From 7b0586c89f8ceffe72e6c78a4a430648f45a7b27 Mon Sep 17 00:00:00 2001
From: Brian Rourke Boll <brianrourkeboll@users.noreply.github.com>
Date: Mon, 13 May 2024 14:56:43 -0400
Subject: [PATCH] Consolidate emitted IL `for`-loop tests (#17128)

* Consolidate emitted IL `for`-loop tests

* The test sources and baselines for these were duplicated in #15484 to
  test the realsig feature, but that meant that the test _sources_
  needed to be kept in sync by hand. This change uses the approach used
  in #16795 instead: it reuses the same test _source_ files and just
  adds duplicate _tests_ to check the emitted IL with realsig+.

* Update netfx baselines

* Fix find/replace bug

* Unify netstandard assembly version in IL

* Re-update baselines

---------

Co-authored-by: Kevin Ransom (msft) <codecutter@hotmail.com>
---
 .../ForEachOnArray01.fs                       |   0
 ...rray01.fs.RealInternalSignatureOff.il.bsl} |   0
 ...Array01.fs.RealInternalSignatureOn.il.bsl} |   0
 .../ForEachOnList01.fs                        |   0
 ...List01.fs.RealInternalSignatureOff.il.bsl} |  18 +-
 ...nList01.fs.RealInternalSignatureOn.il.bsl} |  18 +-
 .../ForEachOnString01.fs                      |   0
 ...ring01.fs.RealInternalSignatureOff.il.bsl} |  18 +-
 ...tring01.fs.RealInternalSignatureOn.il.bsl} |  18 +-
 .../ForEachRangeStepByte.fs                   |   0
 ...te.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...yte.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepChar.fs                   |   0
 ...ar.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...har.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepInt16.fs                  |   0
 ...16.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...t16.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepInt32.fs                  |   0
 ...32.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...t32.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepInt64.fs                  |   0
 ...64.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...t64.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepIntPtr.fs                 |   0
 ...tr.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...Ptr.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepSByte.fs                  |   0
 ...te.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...yte.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepUInt16.fs                 |   0
 ...16.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...t16.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepUInt32.fs                 |   0
 ...32.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...t32.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepUInt64.fs                 |   0
 ...64.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...t64.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStepUIntPtr.fs                |   0
 ...tr.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...Ptr.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachRangeStep_UnitsOfMeasure.fs        |   0
 ...re.fs.RealInternalSignatureOff.opt.il.bsl} |   0
 ...ure.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../EmittedIL/ForLoop/ForLoop.fs              | 483 +++++++++++++++
 .../NoAllocationOfTuple01.fs                  |   0
 ...uple01.fs.RealInternalSignatureOff.il.bsl} |   0
 ...Tuple01.fs.RealInternalSignatureOn.il.bsl} |   0
 .../NoIEnumerable01.fsx                       |   0
 ...ble01.fsx.RealInternalSignatureOff.il.bsl} |   0
 ...able01.fsx.RealInternalSignatureOn.il.bsl} |   0
 .../NoIEnumerable02.fsx                       |   0
 ...ble02.fsx.RealInternalSignatureOff.il.bsl} |   0
 ...able02.fsx.RealInternalSignatureOn.il.bsl} |   0
 .../NoIEnumerable03.fsx                       |   0
 ...ble03.fsx.RealInternalSignatureOff.il.bsl} |   0
 ...able03.fsx.RealInternalSignatureOn.il.bsl} |   0
 .../NonTrivialBranchingBindingInEnd01.fs      |   0
 ...nEnd01.fs.RealInternalSignatureOff.il.bsl} |   6 +-
 ...01.fs.RealInternalSignatureOff.opt.il.bsl} |   6 +-
 ...InEnd01.fs.RealInternalSignatureOn.il.bsl} |   0
 ...d01.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../NonTrivialBranchingBindingInEnd02.fs      |   0
 ...nEnd02.fs.RealInternalSignatureOff.il.bsl} |   6 +-
 ...02.fs.RealInternalSignatureOff.opt.il.bsl} |   6 +-
 ...InEnd02.fs.RealInternalSignatureOn.il.bsl} |   0
 ...d02.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../NonTrivialBranchingBindingInEnd03.fs      |   0
 ...nEnd03.fs.RealInternalSignatureOff.il.bsl} | 146 +++--
 ...03.fs.RealInternalSignatureOff.opt.il.bsl} | 146 +++--
 ...InEnd03.fs.RealInternalSignatureOn.il.bsl} |   0
 ...d03.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../NonTrivialBranchingBindingInEnd04.fs      |   0
 ...nEnd04.fs.RealInternalSignatureOff.il.bsl} | 186 +++---
 ...04.fs.RealInternalSignatureOff.opt.il.bsl} | 186 +++---
 ...InEnd04.fs.RealInternalSignatureOn.il.bsl} |   0
 ...d04.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../NonTrivialBranchingBindingInEnd05.fs      |   0
 ...nEnd05.fs.RealInternalSignatureOff.il.bsl} |   6 +-
 ...05.fs.RealInternalSignatureOff.opt.il.bsl} |   6 +-
 ...InEnd05.fs.RealInternalSignatureOn.il.bsl} |   0
 ...d05.fs.RealInternalSignatureOn.opt.il.bsl} |   0
 .../ForEachOnList01.fs.il.net472.debug.bsl    | 465 --------------
 .../ForEachOnList01.fs.il.net472.release.bsl  | 485 ---------------
 .../ForEachOnList01.fs.il.netcore.debug.bsl   | 465 --------------
 .../ForEachOnString01.fs.il.net472.debug.bsl  | 556 -----------------
 ...ForEachOnString01.fs.il.net472.release.bsl | 571 ------------------
 .../ForEachOnString01.fs.il.netcore.debug.bsl | 556 -----------------
 .../RealInternalSignatureOff/ForLoop.fs       | 216 -------
 .../NoIEnumerable01.fsx.il.net472.debug.bsl   |  96 ---
 .../NoIEnumerable01.fsx.il.net472.release.bsl | 106 ----
 .../NoIEnumerable01.fsx.il.netcore.debug.bsl  |  96 ---
 .../NoIEnumerable02.fsx.il.net472.debug.bsl   |  96 ---
 .../NoIEnumerable02.fsx.il.net472.release.bsl | 106 ----
 .../NoIEnumerable02.fsx.il.netcore.debug.bsl  |  96 ---
 .../NoIEnumerable03.fsx.il.net472.debug.bsl   |  98 ---
 .../NoIEnumerable03.fsx.il.net472.release.bsl | 108 ----
 .../NoIEnumerable03.fsx.il.netcore.debug.bsl  |  98 ---
 .../ForEachOnArray01.fs                       |   8 -
 .../ForEachOnList01.fs                        |  51 --
 .../ForEachOnList01.fs.il.net472.debug.bsl    | 465 --------------
 .../ForEachOnList01.fs.il.net472.release.bsl  | 485 ---------------
 .../ForEachOnList01.fs.il.netcore.debug.bsl   | 465 --------------
 .../ForEachOnString01.fs                      |  67 --
 .../ForEachOnString01.fs.il.net472.debug.bsl  | 556 -----------------
 ...ForEachOnString01.fs.il.net472.release.bsl | 571 ------------------
 .../ForEachOnString01.fs.il.netcore.debug.bsl | 556 -----------------
 .../ForEachRangeStepByte.fs                   |  57 --
 .../ForEachRangeStepChar.fs                   |  57 --
 .../ForEachRangeStepInt16.fs                  |  65 --
 .../ForEachRangeStepInt32.fs                  |  65 --
 .../ForEachRangeStepInt64.fs                  |  65 --
 .../ForEachRangeStepIntPtr.fs                 |  65 --
 .../ForEachRangeStepSByte.fs                  |  65 --
 .../ForEachRangeStepUInt16.fs                 |  57 --
 .../ForEachRangeStepUInt32.fs                 |  57 --
 .../ForEachRangeStepUInt64.fs                 |  57 --
 .../ForEachRangeStepUIntPtr.fs                |  57 --
 .../ForEachRangeStep_UnitsOfMeasure.fs        |  47 --
 .../RealInternalSignatureOn/ForLoop.fs        | 220 -------
 .../NoAllocationOfTuple01.fs                  |  11 -
 .../NoIEnumerable01.fsx                       |   8 -
 .../NoIEnumerable01.fsx.il.net472.debug.bsl   |  96 ---
 .../NoIEnumerable01.fsx.il.net472.release.bsl | 106 ----
 .../NoIEnumerable01.fsx.il.netcore.debug.bsl  |  96 ---
 .../NoIEnumerable02.fsx                       |   8 -
 .../NoIEnumerable02.fsx.il.net472.debug.bsl   |  96 ---
 .../NoIEnumerable02.fsx.il.net472.release.bsl | 106 ----
 .../NoIEnumerable02.fsx.il.netcore.debug.bsl  |  96 ---
 .../NoIEnumerable03.fsx                       |   9 -
 .../NoIEnumerable03.fsx.il.net472.debug.bsl   |  98 ---
 .../NoIEnumerable03.fsx.il.net472.release.bsl | 108 ----
 .../NoIEnumerable03.fsx.il.netcore.debug.bsl  |  98 ---
 .../NonTrivialBranchingBindingInEnd01.fs      |  12 -
 .../NonTrivialBranchingBindingInEnd02.fs      |  12 -
 .../NonTrivialBranchingBindingInEnd03.fs      |  11 -
 .../NonTrivialBranchingBindingInEnd04.fs      |  11 -
 .../NonTrivialBranchingBindingInEnd05.fs      |  12 -
 .../ZeroToArrLength01.fs                      |   7 -
 .../ZeroToArrLength02.fs                      |   7 -
 .../ZeroToArrLength01.fs                      |   0
 ...ngth01.fs.RealInternalSignatureOff.il.bsl} |   0
 ...ength01.fs.RealInternalSignatureOn.il.bsl} |   0
 .../ZeroToArrLength02.fs                      |   0
 ...ngth02.fs.RealInternalSignatureOff.il.bsl} |   0
 ...ength02.fs.RealInternalSignatureOn.il.bsl} |   0
 .../FSharp.Compiler.ComponentTests.fsproj     |   3 +-
 tests/FSharp.Test.Utilities/ILChecker.fs      |  11 +-
 149 files changed, 943 insertions(+), 9706 deletions(-)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachOnArray01.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachOnArray01.fs.il.bsl => ForEachOnArray01.fs.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachOnArray01.fs.il.bsl => ForEachOnArray01.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachOnList01.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.release.bsl => ForEachOnList01.fs.RealInternalSignatureOff.il.bsl} (98%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.release.bsl => ForEachOnList01.fs.RealInternalSignatureOn.il.bsl} (98%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachOnString01.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.release.bsl => ForEachOnString01.fs.RealInternalSignatureOff.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.release.bsl => ForEachOnString01.fs.RealInternalSignatureOn.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepByte.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepByte.fs.opt.il.bsl => ForEachRangeStepByte.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepByte.fs.opt.il.bsl => ForEachRangeStepByte.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepChar.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepChar.fs.opt.il.bsl => ForEachRangeStepChar.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepChar.fs.opt.il.bsl => ForEachRangeStepChar.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepInt16.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepInt16.fs.opt.il.bsl => ForEachRangeStepInt16.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepInt16.fs.opt.il.bsl => ForEachRangeStepInt16.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepInt32.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepInt32.fs.opt.il.bsl => ForEachRangeStepInt32.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepInt32.fs.opt.il.bsl => ForEachRangeStepInt32.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepInt64.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepInt64.fs.opt.il.bsl => ForEachRangeStepInt64.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepInt64.fs.opt.il.bsl => ForEachRangeStepInt64.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepIntPtr.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepIntPtr.fs.opt.il.bsl => ForEachRangeStepIntPtr.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepIntPtr.fs.opt.il.bsl => ForEachRangeStepIntPtr.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepSByte.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepSByte.fs.opt.il.bsl => ForEachRangeStepSByte.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepSByte.fs.opt.il.bsl => ForEachRangeStepSByte.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepUInt16.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepUInt16.fs.opt.il.bsl => ForEachRangeStepUInt16.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepUInt16.fs.opt.il.bsl => ForEachRangeStepUInt16.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepUInt32.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepUInt32.fs.opt.il.bsl => ForEachRangeStepUInt32.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepUInt32.fs.opt.il.bsl => ForEachRangeStepUInt32.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepUInt64.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepUInt64.fs.opt.il.bsl => ForEachRangeStepUInt64.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepUInt64.fs.opt.il.bsl => ForEachRangeStepUInt64.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStepUIntPtr.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStepUIntPtr.fs.opt.il.bsl => ForEachRangeStepUIntPtr.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs.opt.il.bsl => ForEachRangeStepUIntPtr.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ForEachRangeStep_UnitsOfMeasure.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ForEachRangeStep_UnitsOfMeasure.fs.opt.il.bsl => ForEachRangeStep_UnitsOfMeasure.fs.RealInternalSignatureOff.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs.opt.il.bsl => ForEachRangeStep_UnitsOfMeasure.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 create mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForLoop.fs
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NoAllocationOfTuple01.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NoAllocationOfTuple01.fs.il.bsl => NoAllocationOfTuple01.fs.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NoAllocationOfTuple01.fs.il.bsl => NoAllocationOfTuple01.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NoIEnumerable01.fsx (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.release.bsl => NoIEnumerable01.fsx.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.release.bsl => NoIEnumerable01.fsx.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NoIEnumerable02.fsx (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.release.bsl => NoIEnumerable02.fsx.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.release.bsl => NoIEnumerable02.fsx.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NoIEnumerable03.fsx (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.release.bsl => NoIEnumerable03.fsx.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.release.bsl => NoIEnumerable03.fsx.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NonTrivialBranchingBindingInEnd01.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.il.bsl => NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.opt.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs.il.bsl => NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NonTrivialBranchingBindingInEnd02.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.il.bsl => NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.opt.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs.il.bsl => NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NonTrivialBranchingBindingInEnd03.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.il.bsl} (75%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.il.bsl => NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.opt.il.bsl} (75%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs.il.bsl => NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NonTrivialBranchingBindingInEnd04.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.il.bsl} (70%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.il.bsl => NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.opt.il.bsl} (70%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs.il.bsl => NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/NonTrivialBranchingBindingInEnd05.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.il.bsl => NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.opt.il.bsl} (97%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs.il.bsl => NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl => NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOn.opt.il.bsl} (100%)
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForLoop.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnArray01.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepByte.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepChar.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt16.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt32.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt64.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepIntPtr.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepSByte.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt16.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt32.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt64.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForLoop.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoAllocationOfTuple01.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.release.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.debug.bsl
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength01.fs
 delete mode 100644 tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength02.fs
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ZeroToArrLength01.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ZeroToArrLength01.fs.il.bsl => ZeroToArrLength01.fs.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ZeroToArrLength01.fs.il.bsl => ZeroToArrLength01.fs.RealInternalSignatureOn.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff => }/ZeroToArrLength02.fs (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOff/ZeroToArrLength02.fs.il.bsl => ZeroToArrLength02.fs.RealInternalSignatureOff.il.bsl} (100%)
 rename tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/{RealInternalSignatureOn/ZeroToArrLength02.fs.il.bsl => ZeroToArrLength02.fs.RealInternalSignatureOn.il.bsl} (100%)

diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnArray01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnArray01.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnArray01.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnArray01.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnArray01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnArray01.fs.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnArray01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnArray01.fs.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnArray01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnArray01.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnArray01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnArray01.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs.RealInternalSignatureOff.il.bsl
similarity index 98%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs.RealInternalSignatureOff.il.bsl
index ffb525ce929..7dad9856c8f 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.release.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs.RealInternalSignatureOff.il.bsl
@@ -52,8 +52,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
   {
     .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -64,8 +63,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
+    .method public strict virtual instance int32 Invoke(int32 x) cil managed
     {
       
       .maxstack  8
@@ -75,8 +73,7 @@
       IL_0003:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
@@ -91,8 +88,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
   {
     .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -103,8 +99,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
+    .method public strict virtual instance int32 Invoke(int32 x) cil managed
     {
       
       .maxstack  8
@@ -114,8 +109,7 @@
       IL_0003:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs.RealInternalSignatureOn.il.bsl
similarity index 98%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs.RealInternalSignatureOn.il.bsl
index ffb525ce929..7dad9856c8f 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.release.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnList01.fs.RealInternalSignatureOn.il.bsl
@@ -52,8 +52,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
   {
     .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -64,8 +63,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
+    .method public strict virtual instance int32 Invoke(int32 x) cil managed
     {
       
       .maxstack  8
@@ -75,8 +73,7 @@
       IL_0003:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
@@ -91,8 +88,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
   {
     .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -103,8 +99,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
+    .method public strict virtual instance int32 Invoke(int32 x) cil managed
     {
       
       .maxstack  8
@@ -114,8 +109,7 @@
       IL_0003:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs.RealInternalSignatureOff.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs.RealInternalSignatureOff.il.bsl
index 66b3dcc4d84..6b807671df2 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.release.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs.RealInternalSignatureOff.il.bsl
@@ -52,8 +52,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
   {
     .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -64,8 +63,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
+    .method public strict virtual instance char Invoke(char x) cil managed
     {
       
       .maxstack  8
@@ -77,8 +75,7 @@
       IL_0005:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
@@ -93,8 +90,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
   {
     .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -105,8 +101,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
+    .method public strict virtual instance char Invoke(char x) cil managed
     {
       
       .maxstack  8
@@ -118,8 +113,7 @@
       IL_0005:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs.RealInternalSignatureOn.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs.RealInternalSignatureOn.il.bsl
index 66b3dcc4d84..6b807671df2 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.release.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachOnString01.fs.RealInternalSignatureOn.il.bsl
@@ -52,8 +52,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
   {
     .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -64,8 +63,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
+    .method public strict virtual instance char Invoke(char x) cil managed
     {
       
       .maxstack  8
@@ -77,8 +75,7 @@
       IL_0005:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
@@ -93,8 +90,7 @@
          extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
   {
     .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
+    .method assembly specialname rtspecialname instance void  .ctor() cil managed
     {
       .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
       .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
@@ -105,8 +101,7 @@
       IL_0006:  ret
     } 
 
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
+    .method public strict virtual instance char Invoke(char x) cil managed
     {
       
       .maxstack  8
@@ -118,8 +113,7 @@
       IL_0005:  ret
     } 
 
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
+    .method private specialname rtspecialname static void  .cctor() cil managed
     {
       
       .maxstack  10
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepByte.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepByte.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepByte.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepByte.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepByte.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepByte.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepByte.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepByte.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepByte.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepByte.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepByte.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepByte.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepChar.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepChar.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepChar.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepChar.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepChar.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepChar.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepChar.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepChar.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepChar.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepChar.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepChar.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepChar.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt16.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt16.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt16.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt16.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt16.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt16.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt16.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt16.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt16.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt16.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt16.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt16.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt32.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt32.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt32.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt32.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt32.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt32.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt32.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt32.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt32.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt32.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt32.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt32.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt64.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt64.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt64.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt64.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt64.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt64.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepInt64.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt64.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt64.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt64.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt64.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepInt64.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepIntPtr.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepIntPtr.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepIntPtr.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepIntPtr.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepIntPtr.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepIntPtr.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepIntPtr.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepIntPtr.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepIntPtr.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepIntPtr.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepIntPtr.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepIntPtr.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepSByte.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepSByte.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepSByte.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepSByte.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepSByte.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepSByte.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepSByte.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepSByte.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepSByte.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepSByte.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepSByte.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepSByte.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt16.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt16.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt16.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt16.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt16.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt16.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt16.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt16.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt16.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt16.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt16.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt16.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt32.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt32.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt32.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt32.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt32.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt32.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt32.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt32.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt32.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt32.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt32.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt32.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt64.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt64.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt64.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt64.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt64.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt64.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUInt64.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt64.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt64.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt64.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt64.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUInt64.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUIntPtr.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUIntPtr.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUIntPtr.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUIntPtr.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUIntPtr.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUIntPtr.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStepUIntPtr.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUIntPtr.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUIntPtr.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStepUIntPtr.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStep_UnitsOfMeasure.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStep_UnitsOfMeasure.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStep_UnitsOfMeasure.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStep_UnitsOfMeasure.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStep_UnitsOfMeasure.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStep_UnitsOfMeasure.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachRangeStep_UnitsOfMeasure.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStep_UnitsOfMeasure.fs.RealInternalSignatureOff.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStep_UnitsOfMeasure.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForEachRangeStep_UnitsOfMeasure.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForLoop.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForLoop.fs
new file mode 100644
index 00000000000..9a732ba4a30
--- /dev/null
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ForLoop.fs
@@ -0,0 +1,483 @@
+namespace EmittedIL
+
+open Xunit
+open FSharp.Test
+open FSharp.Test.Compiler
+
+module ForLoop =
+
+    let verifyCompilation compilation =
+        compilation
+        |> withOptions [ "--test:EmitFeeFeeAs100001" ]
+        |> asExe
+        |> withOptimize
+        |> withEmbeddedPdb
+        |> withEmbedAllSource
+        |> ignoreWarnings
+        |> verifyILBaseline
+
+    // SOURCE=NoAllocationOfTuple01.fs SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoAllocationOfTuple01.dll" # NoAllocationOfTuple01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NoAllocationOfTuple01.fs"|])>]
+    let ``NoAllocationOfTuple01_fs_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NoAllocationOfTuple01.fs SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoAllocationOfTuple01.dll" # NoAllocationOfTuple01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NoAllocationOfTuple01.fs"|])>]
+    let ``NoAllocationOfTuple01_fs_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachOnArray01.fs      SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnArray01.dll"      # ForEachOnArray01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"ForEachOnArray01.fs"|])>]
+    let ``ForEachOnArray01_fs_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachOnArray01.fs      SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnArray01.dll"      # ForEachOnArray01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"ForEachOnArray01.fs"|])>]
+    let ``ForEachOnArray01_fs_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachOnList01.fs       SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnList01.dll"       # ForEachOnList01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"ForEachOnList01.fs"|])>]
+    let ``ForEachOnList01_fs_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachOnList01.fs       SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnList01.dll"       # ForEachOnList01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"ForEachOnList01.fs"|])>]
+    let ``ForEachOnList01_fs_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachOnString01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnString01.dll"     # ForEachOnString01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"ForEachOnString01.fs"|])>]
+    let ``ForEachOnString01_fs_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachOnString01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnString01.dll"     # ForEachOnString01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"ForEachOnString01.fs"|])>]
+    let ``ForEachOnString01_fs_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ZeroToArrLength01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength01.dll"     # ZeroToArrLength01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"ZeroToArrLength01.fs"|])>]
+    let ``ZeroToArrLength01_fs_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ZeroToArrLength01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength01.dll"     # ZeroToArrLength01.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"ZeroToArrLength01.fs"|])>]
+    let ``ZeroToArrLength01_fs_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ZeroToArrLength02.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength02.dll"     # ZeroToArrLength02.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"ZeroToArrLength02.fs"|])>]
+    let ``ZeroToArrLength02_fs_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ZeroToArrLength02.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength02.dll"     # ZeroToArrLength02.fs
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"ZeroToArrLength02.fs"|])>]
+    let ``ZeroToArrLength02_fs_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NoIEnumerable01.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable01.dll"            # NoIEnumerable01.fsx
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NoIEnumerable01.fsx"|])>]
+    let ``NoIEnumerable01_fsx_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NoIEnumerable01.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable01.dll"            # NoIEnumerable01.fsx
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NoIEnumerable01.fsx"|])>]
+    let ``NoIEnumerable01_fsx_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NoIEnumerable02.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable02.dll"            # NoIEnumerable02.fsx
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NoIEnumerable02.fsx"|])>]
+    let ``NoIEnumerable02_fsx_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NoIEnumerable02.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable02.dll"            # NoIEnumerable02.fsx
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NoIEnumerable02.fsx"|])>]
+    let ``NoIEnumerable02_fsx_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NoIEnumerable03.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable03.dll"            # NoIEnumerable03.fsx
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NoIEnumerable03.fsx"|])>]
+    let ``NoIEnumerable03_fsx_RealInternalSignatureOff`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NoIEnumerable03.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable03.dll"            # NoIEnumerable03.fsx
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NoIEnumerable03.fsx"|])>]
+    let ``NoIEnumerable03_fsx_RealInternalSignatureOn`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd01.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd01_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd01.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd01_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd01.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd01_fs_RealInternalSignatureOff_nonopt`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd01.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd01_fs_RealInternalSignatureOn_nonopt`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd02.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd02_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd02.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd02_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd02.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd02_fs_RealInternalSignatureOff_nonopt`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd02.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd02_fs_RealInternalSignatureOn_nonopt`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd03.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd03_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd03.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd03_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd03.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd03_fs_RealInternalSignatureOff_nonopt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd03.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd03_fs_RealInternalSignatureOn_nonopt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd04.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd04_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd04.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd04_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd04.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd04_fs_RealInternalSignatureOff_nonopt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd04.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd04_fs_RealInternalSignatureOn_nonopt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd05.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd05_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd05.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd05_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd05.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff", Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd05_fs_RealInternalSignatureOff_nonopt`` compilation =
+        compilation
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd05.fs --optimize-
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn", Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
+    let ``NonTrivialBranchingBindingInEnd05_fs_RealInternalSignatureOn_nonopt`` compilation =
+        compilation
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepSByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepSByte.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepSByte.fs"|])>]
+    let ``ForEachRangeStepSByte_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepSByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepSByte.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepSByte.fs"|])>]
+    let ``ForEachRangeStepSByte_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepByte.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepByte.fs"|])>]
+    let ``ForEachRangeStepByte_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepByte.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepByte.fs"|])>]
+    let ``ForEachRangeStepByte_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepChar.fs SCFLAGS="--optimize+"	# ForEachRangeStepChar.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepChar.fs"|])>]
+    let ``ForEachRangeStepChar_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepChar.fs SCFLAGS="--optimize+"	# ForEachRangeStepChar.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepChar.fs"|])>]
+    let ``ForEachRangeStepChar_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt16.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepInt16.fs"|])>]
+    let ``ForEachRangeStepInt16_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt16.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepInt16.fs"|])>]
+    let ``ForEachRangeStepInt16_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt16.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepUInt16.fs"|])>]
+    let ``ForEachRangeStepUInt16_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt16.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepUInt16.fs"|])>]
+    let ``ForEachRangeStepUInt16_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt32.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepInt32.fs"|])>]
+    let ``ForEachRangeStepInt32_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt32.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepInt32.fs"|])>]
+    let ``ForEachRangeStepInt32_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt32.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepUInt32.fs"|])>]
+    let ``ForEachRangeStepUInt32_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt32.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepUInt32.fs"|])>]
+    let ``ForEachRangeStepUInt32_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt64.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepInt64.fs"|])>]
+    let ``ForEachRangeStepInt64_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt64.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepInt64.fs"|])>]
+    let ``ForEachRangeStepInt64_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt64.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepUInt64.fs"|])>]
+    let ``ForEachRangeStepUInt64_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt64.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepUInt64.fs"|])>]
+    let ``ForEachRangeStepUInt64_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepIntPtr.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepIntPtr.fs"|])>]
+    let ``ForEachRangeStepIntPtr_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepIntPtr.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepIntPtr.fs"|])>]
+    let ``ForEachRangeStepIntPtr_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepUIntPtr.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStepUIntPtr.fs"|])>]
+    let ``ForEachRangeStepUIntPtr_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStepUIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepUIntPtr.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStepUIntPtr.fs"|])>]
+    let ``ForEachRangeStepUIntPtr_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStep_UnitsOfMeasure.fs SCFLAGS="--optimize+"	# ForEachRangeStep_UnitsOfMeasure.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOff.opt", Includes=[|"ForEachRangeStep_UnitsOfMeasure.fs"|])>]
+    let ``ForEachRangeStep_UnitsOfMeasure_fs_RealInternalSignatureOff_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOff
+        |> verifyCompilation
+
+    // SOURCE=ForEachRangeStep_UnitsOfMeasure.fs SCFLAGS="--optimize+"	# ForEachRangeStep_UnitsOfMeasure.fs --optimize+
+    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".RealInternalSignatureOn.opt", Includes=[|"ForEachRangeStep_UnitsOfMeasure.fs"|])>]
+    let ``ForEachRangeStep_UnitsOfMeasure_fs_RealInternalSignatureOn_opt`` compilation =
+        compilation
+        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
+        |> withRealInternalSignatureOn
+        |> verifyCompilation
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoAllocationOfTuple01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoAllocationOfTuple01.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoAllocationOfTuple01.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoAllocationOfTuple01.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoAllocationOfTuple01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoAllocationOfTuple01.fs.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoAllocationOfTuple01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoAllocationOfTuple01.fs.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoAllocationOfTuple01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoAllocationOfTuple01.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoAllocationOfTuple01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoAllocationOfTuple01.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable01.fsx
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable01.fsx
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable01.fsx.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable01.fsx.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable01.fsx.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable01.fsx.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable02.fsx
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable02.fsx
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable02.fsx.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable02.fsx.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable02.fsx.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable02.fsx.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable03.fsx
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable03.fsx
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable03.fsx.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable03.fsx.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable03.fsx.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.release.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NoIEnumerable03.fsx.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.il.bsl
index 6a74361f612..24776ea3bce 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.il.bsl
@@ -43,8 +43,7 @@
        extends [runtime]System.Object
 {
   .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public specialname static int32[] 
-          get_r() cil managed
+  .method public specialname static int32[] get_r() cil managed
   {
     
     .maxstack  8
@@ -52,8 +51,7 @@
     IL_0005:  ret
   } 
 
-  .method public specialname static int32[] 
-          get_w() cil managed
+  .method public specialname static int32[] get_w() cil managed
   {
     
     .maxstack  8
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.opt.il.bsl
index 6a74361f612..24776ea3bce 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd01.fs.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOff.opt.il.bsl
@@ -43,8 +43,7 @@
        extends [runtime]System.Object
 {
   .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public specialname static int32[] 
-          get_r() cil managed
+  .method public specialname static int32[] get_r() cil managed
   {
     
     .maxstack  8
@@ -52,8 +51,7 @@
     IL_0005:  ret
   } 
 
-  .method public specialname static int32[] 
-          get_w() cil managed
+  .method public specialname static int32[] get_w() cil managed
   {
     
     .maxstack  8
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd01.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.il.bsl
index 415e5ffd7f1..e3a8fe9afec 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.il.bsl
@@ -43,8 +43,7 @@
        extends [runtime]System.Object
 {
   .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public specialname static int32[] 
-          get_r() cil managed
+  .method public specialname static int32[] get_r() cil managed
   {
     
     .maxstack  8
@@ -52,8 +51,7 @@
     IL_0005:  ret
   } 
 
-  .method public specialname static int32[] 
-          get_w() cil managed
+  .method public specialname static int32[] get_w() cil managed
   {
     
     .maxstack  8
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.opt.il.bsl
index 415e5ffd7f1..e3a8fe9afec 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOff.opt.il.bsl
@@ -43,8 +43,7 @@
        extends [runtime]System.Object
 {
   .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public specialname static int32[] 
-          get_r() cil managed
+  .method public specialname static int32[] get_r() cil managed
   {
     
     .maxstack  8
@@ -52,8 +51,7 @@
     IL_0005:  ret
   } 
 
-  .method public specialname static int32[] 
-          get_w() cil managed
+  .method public specialname static int32[] get_w() cil managed
   {
     
     .maxstack  8
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd02.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.il.bsl
similarity index 75%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.il.bsl
index afcb05828cd..f51b28f7d87 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.il.bsl
@@ -169,7 +169,11 @@
     .entrypoint
     
     .maxstack  7
-    .locals init (int32 V_0)
+    .locals init (int32 V_0,
+             uint64 V_1,
+             valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32> V_2,
+             uint64 V_3,
+             int32 V_4)
     IL_0000:  ldc.i4.8
     IL_0001:  ldc.i4.1
     IL_0002:  call       !!0[] [FSharp.Core]Microsoft.FSharp.Collections.ArrayModule::Create<int32>(int32,
@@ -200,57 +204,95 @@
     IL_0049:  nop
     IL_004a:  ldc.i4.1
     IL_004b:  sub
-    IL_004c:  ldc.i4.m1
-    IL_004d:  ldc.i4.0
-    IL_004e:  call       class [runtime]System.Collections.Generic.IEnumerable`1<int32> [FSharp.Core]Microsoft.FSharp.Core.Operators/OperatorIntrinsics::RangeInt32(int32,
-                                                                                                                                                                           int32,
-                                                                                                                                                                           int32)
-    IL_0053:  call       class [runtime]System.Collections.Generic.IEnumerable`1<!!0> [FSharp.Core]Microsoft.FSharp.Core.Operators::CreateSequence<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_0058:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0> [FSharp.Core]Microsoft.FSharp.Collections.SeqModule::ToList<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_005d:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
-    IL_0062:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0067:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_006c:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
-    IL_0071:  br.s       IL_00b9
-
-    IL_0073:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0078:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_007d:  stloc.0
-    IL_007e:  call       int32[] assembly::get_r()
-    IL_0083:  ldloc.0
-    IL_0084:  call       int32[] assembly::get_r()
-    IL_0089:  ldloc.0
-    IL_008a:  ldelem     [runtime]System.Int32
-    IL_008f:  call       int32[] assembly::get_w()
-    IL_0094:  ldloc.0
-    IL_0095:  ldelem     [runtime]System.Int32
-    IL_009a:  add
-    IL_009b:  stelem     [runtime]System.Int32
-    IL_00a0:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00a5:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00aa:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_00af:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_00b4:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00b9:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00be:  brtrue.s   IL_0073
-
-    IL_00c0:  nop
-    IL_00c1:  nop
-    IL_00c2:  call       int32[] assembly::get_r()
-    IL_00c7:  ldc.i4.0
-    IL_00c8:  ldelem     [runtime]System.Int32
-    IL_00cd:  ldc.i4.3
-    IL_00ce:  bne.un.s   IL_00d4
-
-    IL_00d0:  ldc.i4.0
-    IL_00d1:  nop
-    IL_00d2:  br.s       IL_00d6
-
-    IL_00d4:  ldc.i4.1
-    IL_00d5:  nop
-    IL_00d6:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
-    IL_00db:  pop
-    IL_00dc:  ret
+    IL_004c:  stloc.0
+    IL_004d:  ldloc.0
+    IL_004e:  ldc.i4.0
+    IL_004f:  bge.s      IL_0056
+
+    IL_0051:  ldc.i4.0
+    IL_0052:  conv.i8
+    IL_0053:  nop
+    IL_0054:  br.s       IL_005e
+
+    IL_0056:  ldloc.0
+    IL_0057:  ldc.i4.0
+    IL_0058:  sub
+    IL_0059:  conv.i8
+    IL_005a:  ldc.i4.1
+    IL_005b:  conv.i8
+    IL_005c:  add
+    IL_005d:  nop
+    IL_005e:  stloc.1
+    IL_005f:  ldc.i4.0
+    IL_0060:  conv.i8
+    IL_0061:  stloc.3
+    IL_0062:  ldc.i4.0
+    IL_0063:  stloc.s    V_4
+    IL_0065:  br.s       IL_007c
+
+    IL_0067:  ldloca.s   V_2
+    IL_0069:  ldloc.s    V_4
+    IL_006b:  call       instance void valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Add(!0)
+    IL_0070:  nop
+    IL_0071:  ldloc.s    V_4
+    IL_0073:  ldc.i4.1
+    IL_0074:  add
+    IL_0075:  stloc.s    V_4
+    IL_0077:  ldloc.3
+    IL_0078:  ldc.i4.1
+    IL_0079:  conv.i8
+    IL_007a:  add
+    IL_007b:  stloc.3
+    IL_007c:  ldloc.3
+    IL_007d:  ldloc.1
+    IL_007e:  blt.un.s   IL_0067
+
+    IL_0080:  ldloca.s   V_2
+    IL_0082:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Close()
+    IL_0087:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
+    IL_008c:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_0091:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_0096:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
+    IL_009b:  br.s       IL_00e3
+
+    IL_009d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00a2:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
+    IL_00a7:  stloc.0
+    IL_00a8:  call       int32[] assembly::get_r()
+    IL_00ad:  ldloc.0
+    IL_00ae:  call       int32[] assembly::get_r()
+    IL_00b3:  ldloc.0
+    IL_00b4:  ldelem     [runtime]System.Int32
+    IL_00b9:  call       int32[] assembly::get_w()
+    IL_00be:  ldloc.0
+    IL_00bf:  ldelem     [runtime]System.Int32
+    IL_00c4:  add
+    IL_00c5:  stelem     [runtime]System.Int32
+    IL_00ca:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00cf:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00d4:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00d9:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_00de:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00e3:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00e8:  brtrue.s   IL_009d
+
+    IL_00ea:  nop
+    IL_00eb:  nop
+    IL_00ec:  call       int32[] assembly::get_r()
+    IL_00f1:  ldc.i4.0
+    IL_00f2:  ldelem     [runtime]System.Int32
+    IL_00f7:  ldc.i4.3
+    IL_00f8:  bne.un.s   IL_00fe
+
+    IL_00fa:  ldc.i4.0
+    IL_00fb:  nop
+    IL_00fc:  br.s       IL_0100
+
+    IL_00fe:  ldc.i4.1
+    IL_00ff:  nop
+    IL_0100:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
+    IL_0105:  pop
+    IL_0106:  ret
   } 
 
 } 
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 75%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.opt.il.bsl
index afcb05828cd..f51b28f7d87 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOff.opt.il.bsl
@@ -169,7 +169,11 @@
     .entrypoint
     
     .maxstack  7
-    .locals init (int32 V_0)
+    .locals init (int32 V_0,
+             uint64 V_1,
+             valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32> V_2,
+             uint64 V_3,
+             int32 V_4)
     IL_0000:  ldc.i4.8
     IL_0001:  ldc.i4.1
     IL_0002:  call       !!0[] [FSharp.Core]Microsoft.FSharp.Collections.ArrayModule::Create<int32>(int32,
@@ -200,57 +204,95 @@
     IL_0049:  nop
     IL_004a:  ldc.i4.1
     IL_004b:  sub
-    IL_004c:  ldc.i4.m1
-    IL_004d:  ldc.i4.0
-    IL_004e:  call       class [runtime]System.Collections.Generic.IEnumerable`1<int32> [FSharp.Core]Microsoft.FSharp.Core.Operators/OperatorIntrinsics::RangeInt32(int32,
-                                                                                                                                                                           int32,
-                                                                                                                                                                           int32)
-    IL_0053:  call       class [runtime]System.Collections.Generic.IEnumerable`1<!!0> [FSharp.Core]Microsoft.FSharp.Core.Operators::CreateSequence<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_0058:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0> [FSharp.Core]Microsoft.FSharp.Collections.SeqModule::ToList<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_005d:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
-    IL_0062:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0067:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_006c:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
-    IL_0071:  br.s       IL_00b9
-
-    IL_0073:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0078:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_007d:  stloc.0
-    IL_007e:  call       int32[] assembly::get_r()
-    IL_0083:  ldloc.0
-    IL_0084:  call       int32[] assembly::get_r()
-    IL_0089:  ldloc.0
-    IL_008a:  ldelem     [runtime]System.Int32
-    IL_008f:  call       int32[] assembly::get_w()
-    IL_0094:  ldloc.0
-    IL_0095:  ldelem     [runtime]System.Int32
-    IL_009a:  add
-    IL_009b:  stelem     [runtime]System.Int32
-    IL_00a0:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00a5:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00aa:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_00af:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_00b4:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00b9:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00be:  brtrue.s   IL_0073
-
-    IL_00c0:  nop
-    IL_00c1:  nop
-    IL_00c2:  call       int32[] assembly::get_r()
-    IL_00c7:  ldc.i4.0
-    IL_00c8:  ldelem     [runtime]System.Int32
-    IL_00cd:  ldc.i4.3
-    IL_00ce:  bne.un.s   IL_00d4
-
-    IL_00d0:  ldc.i4.0
-    IL_00d1:  nop
-    IL_00d2:  br.s       IL_00d6
-
-    IL_00d4:  ldc.i4.1
-    IL_00d5:  nop
-    IL_00d6:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
-    IL_00db:  pop
-    IL_00dc:  ret
+    IL_004c:  stloc.0
+    IL_004d:  ldloc.0
+    IL_004e:  ldc.i4.0
+    IL_004f:  bge.s      IL_0056
+
+    IL_0051:  ldc.i4.0
+    IL_0052:  conv.i8
+    IL_0053:  nop
+    IL_0054:  br.s       IL_005e
+
+    IL_0056:  ldloc.0
+    IL_0057:  ldc.i4.0
+    IL_0058:  sub
+    IL_0059:  conv.i8
+    IL_005a:  ldc.i4.1
+    IL_005b:  conv.i8
+    IL_005c:  add
+    IL_005d:  nop
+    IL_005e:  stloc.1
+    IL_005f:  ldc.i4.0
+    IL_0060:  conv.i8
+    IL_0061:  stloc.3
+    IL_0062:  ldc.i4.0
+    IL_0063:  stloc.s    V_4
+    IL_0065:  br.s       IL_007c
+
+    IL_0067:  ldloca.s   V_2
+    IL_0069:  ldloc.s    V_4
+    IL_006b:  call       instance void valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Add(!0)
+    IL_0070:  nop
+    IL_0071:  ldloc.s    V_4
+    IL_0073:  ldc.i4.1
+    IL_0074:  add
+    IL_0075:  stloc.s    V_4
+    IL_0077:  ldloc.3
+    IL_0078:  ldc.i4.1
+    IL_0079:  conv.i8
+    IL_007a:  add
+    IL_007b:  stloc.3
+    IL_007c:  ldloc.3
+    IL_007d:  ldloc.1
+    IL_007e:  blt.un.s   IL_0067
+
+    IL_0080:  ldloca.s   V_2
+    IL_0082:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Close()
+    IL_0087:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
+    IL_008c:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_0091:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_0096:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
+    IL_009b:  br.s       IL_00e3
+
+    IL_009d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00a2:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
+    IL_00a7:  stloc.0
+    IL_00a8:  call       int32[] assembly::get_r()
+    IL_00ad:  ldloc.0
+    IL_00ae:  call       int32[] assembly::get_r()
+    IL_00b3:  ldloc.0
+    IL_00b4:  ldelem     [runtime]System.Int32
+    IL_00b9:  call       int32[] assembly::get_w()
+    IL_00be:  ldloc.0
+    IL_00bf:  ldelem     [runtime]System.Int32
+    IL_00c4:  add
+    IL_00c5:  stelem     [runtime]System.Int32
+    IL_00ca:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00cf:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00d4:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00d9:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_00de:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00e3:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00e8:  brtrue.s   IL_009d
+
+    IL_00ea:  nop
+    IL_00eb:  nop
+    IL_00ec:  call       int32[] assembly::get_r()
+    IL_00f1:  ldc.i4.0
+    IL_00f2:  ldelem     [runtime]System.Int32
+    IL_00f7:  ldc.i4.3
+    IL_00f8:  bne.un.s   IL_00fe
+
+    IL_00fa:  ldc.i4.0
+    IL_00fb:  nop
+    IL_00fc:  br.s       IL_0100
+
+    IL_00fe:  ldc.i4.1
+    IL_00ff:  nop
+    IL_0100:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
+    IL_0105:  pop
+    IL_0106:  ret
   } 
 
 } 
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd03.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd04.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.il.bsl
similarity index 70%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.il.bsl
index fb5c2acf0b3..df03b5ff533 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.opt.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.il.bsl
@@ -169,7 +169,11 @@
     .entrypoint
     
     .maxstack  7
-    .locals init (int32 V_0)
+    .locals init (int32 V_0,
+             uint64 V_1,
+             valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32> V_2,
+             uint64 V_3,
+             int32 V_4)
     IL_0000:  ldc.i4.8
     IL_0001:  ldc.i4.1
     IL_0002:  call       !!0[] [FSharp.Core]Microsoft.FSharp.Collections.ArrayModule::Create<int32>(int32,
@@ -180,77 +184,115 @@
     IL_000e:  call       !!0[] [FSharp.Core]Microsoft.FSharp.Collections.ArrayModule::Create<int32>(int32,
                                                                                                     !!0)
     IL_0013:  stsfld     int32[] '<StartupCode$assembly>'.$assembly::w@7
-    IL_0018:  ldc.i4.0
-    IL_0019:  ldc.i4.1
-    IL_001a:  call       int32[] assembly::get_r()
-    IL_001f:  ldlen
-    IL_0020:  conv.i4
-    IL_0021:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e1@1
-    IL_0026:  call       int32[] assembly::get_w()
-    IL_002b:  ldlen
-    IL_002c:  conv.i4
-    IL_002d:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e2@1
-    IL_0032:  call       int32 assembly::get_e1@1()
-    IL_0037:  call       int32 assembly::get_e2@1()
-    IL_003c:  bge.s      IL_0046
-
-    IL_003e:  call       int32 assembly::get_e1@1()
-    IL_0043:  nop
-    IL_0044:  br.s       IL_004c
-
-    IL_0046:  call       int32 assembly::get_e2@1()
-    IL_004b:  nop
-    IL_004c:  ldc.i4.1
-    IL_004d:  sub
-    IL_004e:  call       class [runtime]System.Collections.Generic.IEnumerable`1<int32> [FSharp.Core]Microsoft.FSharp.Core.Operators/OperatorIntrinsics::RangeInt32(int32,
-                                                                                                                                                                           int32,
-                                                                                                                                                                           int32)
-    IL_0053:  call       class [runtime]System.Collections.Generic.IEnumerable`1<!!0> [FSharp.Core]Microsoft.FSharp.Core.Operators::CreateSequence<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_0058:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0> [FSharp.Core]Microsoft.FSharp.Collections.SeqModule::ToList<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_005d:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
-    IL_0062:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0067:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_006c:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
-    IL_0071:  br.s       IL_00b9
-
-    IL_0073:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0078:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_007d:  stloc.0
-    IL_007e:  call       int32[] assembly::get_r()
-    IL_0083:  ldloc.0
-    IL_0084:  call       int32[] assembly::get_r()
-    IL_0089:  ldloc.0
-    IL_008a:  ldelem     [runtime]System.Int32
-    IL_008f:  call       int32[] assembly::get_w()
-    IL_0094:  ldloc.0
-    IL_0095:  ldelem     [runtime]System.Int32
-    IL_009a:  add
-    IL_009b:  stelem     [runtime]System.Int32
-    IL_00a0:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00a5:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00aa:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_00af:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_00b4:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00b9:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00be:  brtrue.s   IL_0073
-
-    IL_00c0:  nop
-    IL_00c1:  nop
-    IL_00c2:  call       int32[] assembly::get_r()
-    IL_00c7:  ldc.i4.0
-    IL_00c8:  ldelem     [runtime]System.Int32
-    IL_00cd:  ldc.i4.3
-    IL_00ce:  bne.un.s   IL_00d4
-
-    IL_00d0:  ldc.i4.0
-    IL_00d1:  nop
-    IL_00d2:  br.s       IL_00d6
-
-    IL_00d4:  ldc.i4.1
-    IL_00d5:  nop
-    IL_00d6:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
-    IL_00db:  pop
-    IL_00dc:  ret
+    IL_0018:  call       int32[] assembly::get_r()
+    IL_001d:  ldlen
+    IL_001e:  conv.i4
+    IL_001f:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e1@1
+    IL_0024:  call       int32[] assembly::get_w()
+    IL_0029:  ldlen
+    IL_002a:  conv.i4
+    IL_002b:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e2@1
+    IL_0030:  call       int32 assembly::get_e1@1()
+    IL_0035:  call       int32 assembly::get_e2@1()
+    IL_003a:  bge.s      IL_0044
+
+    IL_003c:  call       int32 assembly::get_e1@1()
+    IL_0041:  nop
+    IL_0042:  br.s       IL_004a
+
+    IL_0044:  call       int32 assembly::get_e2@1()
+    IL_0049:  nop
+    IL_004a:  ldc.i4.1
+    IL_004b:  sub
+    IL_004c:  stloc.0
+    IL_004d:  ldloc.0
+    IL_004e:  ldc.i4.0
+    IL_004f:  bge.s      IL_0056
+
+    IL_0051:  ldc.i4.0
+    IL_0052:  conv.i8
+    IL_0053:  nop
+    IL_0054:  br.s       IL_005e
+
+    IL_0056:  ldloc.0
+    IL_0057:  ldc.i4.0
+    IL_0058:  sub
+    IL_0059:  conv.i8
+    IL_005a:  ldc.i4.1
+    IL_005b:  conv.i8
+    IL_005c:  add
+    IL_005d:  nop
+    IL_005e:  stloc.1
+    IL_005f:  ldc.i4.0
+    IL_0060:  conv.i8
+    IL_0061:  stloc.3
+    IL_0062:  ldloc.0
+    IL_0063:  stloc.s    V_4
+    IL_0065:  br.s       IL_007c
+
+    IL_0067:  ldloca.s   V_2
+    IL_0069:  ldloc.s    V_4
+    IL_006b:  call       instance void valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Add(!0)
+    IL_0070:  nop
+    IL_0071:  ldloc.s    V_4
+    IL_0073:  ldc.i4.m1
+    IL_0074:  add
+    IL_0075:  stloc.s    V_4
+    IL_0077:  ldloc.3
+    IL_0078:  ldc.i4.1
+    IL_0079:  conv.i8
+    IL_007a:  add
+    IL_007b:  stloc.3
+    IL_007c:  ldloc.3
+    IL_007d:  ldloc.1
+    IL_007e:  blt.un.s   IL_0067
+
+    IL_0080:  ldloca.s   V_2
+    IL_0082:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Close()
+    IL_0087:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
+    IL_008c:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_0091:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_0096:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
+    IL_009b:  br.s       IL_00e3
+
+    IL_009d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00a2:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
+    IL_00a7:  stloc.0
+    IL_00a8:  call       int32[] assembly::get_r()
+    IL_00ad:  ldloc.0
+    IL_00ae:  call       int32[] assembly::get_r()
+    IL_00b3:  ldloc.0
+    IL_00b4:  ldelem     [runtime]System.Int32
+    IL_00b9:  call       int32[] assembly::get_w()
+    IL_00be:  ldloc.0
+    IL_00bf:  ldelem     [runtime]System.Int32
+    IL_00c4:  add
+    IL_00c5:  stelem     [runtime]System.Int32
+    IL_00ca:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00cf:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00d4:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00d9:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_00de:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00e3:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00e8:  brtrue.s   IL_009d
+
+    IL_00ea:  nop
+    IL_00eb:  nop
+    IL_00ec:  call       int32[] assembly::get_r()
+    IL_00f1:  ldc.i4.0
+    IL_00f2:  ldelem     [runtime]System.Int32
+    IL_00f7:  ldc.i4.3
+    IL_00f8:  bne.un.s   IL_00fe
+
+    IL_00fa:  ldc.i4.0
+    IL_00fb:  nop
+    IL_00fc:  br.s       IL_0100
+
+    IL_00fe:  ldc.i4.1
+    IL_00ff:  nop
+    IL_0100:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
+    IL_0105:  pop
+    IL_0106:  ret
   } 
 
 } 
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 70%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.opt.il.bsl
index fb5c2acf0b3..df03b5ff533 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd03.fs.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOff.opt.il.bsl
@@ -169,7 +169,11 @@
     .entrypoint
     
     .maxstack  7
-    .locals init (int32 V_0)
+    .locals init (int32 V_0,
+             uint64 V_1,
+             valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32> V_2,
+             uint64 V_3,
+             int32 V_4)
     IL_0000:  ldc.i4.8
     IL_0001:  ldc.i4.1
     IL_0002:  call       !!0[] [FSharp.Core]Microsoft.FSharp.Collections.ArrayModule::Create<int32>(int32,
@@ -180,77 +184,115 @@
     IL_000e:  call       !!0[] [FSharp.Core]Microsoft.FSharp.Collections.ArrayModule::Create<int32>(int32,
                                                                                                     !!0)
     IL_0013:  stsfld     int32[] '<StartupCode$assembly>'.$assembly::w@7
-    IL_0018:  ldc.i4.0
-    IL_0019:  ldc.i4.1
-    IL_001a:  call       int32[] assembly::get_r()
-    IL_001f:  ldlen
-    IL_0020:  conv.i4
-    IL_0021:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e1@1
-    IL_0026:  call       int32[] assembly::get_w()
-    IL_002b:  ldlen
-    IL_002c:  conv.i4
-    IL_002d:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e2@1
-    IL_0032:  call       int32 assembly::get_e1@1()
-    IL_0037:  call       int32 assembly::get_e2@1()
-    IL_003c:  bge.s      IL_0046
-
-    IL_003e:  call       int32 assembly::get_e1@1()
-    IL_0043:  nop
-    IL_0044:  br.s       IL_004c
-
-    IL_0046:  call       int32 assembly::get_e2@1()
-    IL_004b:  nop
-    IL_004c:  ldc.i4.1
-    IL_004d:  sub
-    IL_004e:  call       class [runtime]System.Collections.Generic.IEnumerable`1<int32> [FSharp.Core]Microsoft.FSharp.Core.Operators/OperatorIntrinsics::RangeInt32(int32,
-                                                                                                                                                                           int32,
-                                                                                                                                                                           int32)
-    IL_0053:  call       class [runtime]System.Collections.Generic.IEnumerable`1<!!0> [FSharp.Core]Microsoft.FSharp.Core.Operators::CreateSequence<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_0058:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0> [FSharp.Core]Microsoft.FSharp.Collections.SeqModule::ToList<int32>(class [runtime]System.Collections.Generic.IEnumerable`1<!!0>)
-    IL_005d:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
-    IL_0062:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0067:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_006c:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
-    IL_0071:  br.s       IL_00b9
-
-    IL_0073:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_0078:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_007d:  stloc.0
-    IL_007e:  call       int32[] assembly::get_r()
-    IL_0083:  ldloc.0
-    IL_0084:  call       int32[] assembly::get_r()
-    IL_0089:  ldloc.0
-    IL_008a:  ldelem     [runtime]System.Int32
-    IL_008f:  call       int32[] assembly::get_w()
-    IL_0094:  ldloc.0
-    IL_0095:  ldelem     [runtime]System.Int32
-    IL_009a:  add
-    IL_009b:  stelem     [runtime]System.Int32
-    IL_00a0:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00a5:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00aa:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
-    IL_00af:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_00b4:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
-    IL_00b9:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
-    IL_00be:  brtrue.s   IL_0073
-
-    IL_00c0:  nop
-    IL_00c1:  nop
-    IL_00c2:  call       int32[] assembly::get_r()
-    IL_00c7:  ldc.i4.0
-    IL_00c8:  ldelem     [runtime]System.Int32
-    IL_00cd:  ldc.i4.3
-    IL_00ce:  bne.un.s   IL_00d4
-
-    IL_00d0:  ldc.i4.0
-    IL_00d1:  nop
-    IL_00d2:  br.s       IL_00d6
-
-    IL_00d4:  ldc.i4.1
-    IL_00d5:  nop
-    IL_00d6:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
-    IL_00db:  pop
-    IL_00dc:  ret
+    IL_0018:  call       int32[] assembly::get_r()
+    IL_001d:  ldlen
+    IL_001e:  conv.i4
+    IL_001f:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e1@1
+    IL_0024:  call       int32[] assembly::get_w()
+    IL_0029:  ldlen
+    IL_002a:  conv.i4
+    IL_002b:  stsfld     int32 '<StartupCode$assembly>'.$assembly::e2@1
+    IL_0030:  call       int32 assembly::get_e1@1()
+    IL_0035:  call       int32 assembly::get_e2@1()
+    IL_003a:  bge.s      IL_0044
+
+    IL_003c:  call       int32 assembly::get_e1@1()
+    IL_0041:  nop
+    IL_0042:  br.s       IL_004a
+
+    IL_0044:  call       int32 assembly::get_e2@1()
+    IL_0049:  nop
+    IL_004a:  ldc.i4.1
+    IL_004b:  sub
+    IL_004c:  stloc.0
+    IL_004d:  ldloc.0
+    IL_004e:  ldc.i4.0
+    IL_004f:  bge.s      IL_0056
+
+    IL_0051:  ldc.i4.0
+    IL_0052:  conv.i8
+    IL_0053:  nop
+    IL_0054:  br.s       IL_005e
+
+    IL_0056:  ldloc.0
+    IL_0057:  ldc.i4.0
+    IL_0058:  sub
+    IL_0059:  conv.i8
+    IL_005a:  ldc.i4.1
+    IL_005b:  conv.i8
+    IL_005c:  add
+    IL_005d:  nop
+    IL_005e:  stloc.1
+    IL_005f:  ldc.i4.0
+    IL_0060:  conv.i8
+    IL_0061:  stloc.3
+    IL_0062:  ldloc.0
+    IL_0063:  stloc.s    V_4
+    IL_0065:  br.s       IL_007c
+
+    IL_0067:  ldloca.s   V_2
+    IL_0069:  ldloc.s    V_4
+    IL_006b:  call       instance void valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Add(!0)
+    IL_0070:  nop
+    IL_0071:  ldloc.s    V_4
+    IL_0073:  ldc.i4.m1
+    IL_0074:  add
+    IL_0075:  stloc.s    V_4
+    IL_0077:  ldloc.3
+    IL_0078:  ldc.i4.1
+    IL_0079:  conv.i8
+    IL_007a:  add
+    IL_007b:  stloc.3
+    IL_007c:  ldloc.3
+    IL_007d:  ldloc.1
+    IL_007e:  blt.un.s   IL_0067
+
+    IL_0080:  ldloca.s   V_2
+    IL_0082:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> valuetype [FSharp.Core]Microsoft.FSharp.Core.CompilerServices.ListCollector`1<int32>::Close()
+    IL_0087:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::current@9
+    IL_008c:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_0091:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_0096:  stsfld     class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> '<StartupCode$assembly>'.$assembly::next@9
+    IL_009b:  br.s       IL_00e3
+
+    IL_009d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00a2:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
+    IL_00a7:  stloc.0
+    IL_00a8:  call       int32[] assembly::get_r()
+    IL_00ad:  ldloc.0
+    IL_00ae:  call       int32[] assembly::get_r()
+    IL_00b3:  ldloc.0
+    IL_00b4:  ldelem     [runtime]System.Int32
+    IL_00b9:  call       int32[] assembly::get_w()
+    IL_00be:  ldloc.0
+    IL_00bf:  ldelem     [runtime]System.Int32
+    IL_00c4:  add
+    IL_00c5:  stelem     [runtime]System.Int32
+    IL_00ca:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00cf:  call       void assembly::set_current@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00d4:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_current@9()
+    IL_00d9:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
+    IL_00de:  call       void assembly::set_next@9(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>)
+    IL_00e3:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> assembly::get_next@9()
+    IL_00e8:  brtrue.s   IL_009d
+
+    IL_00ea:  nop
+    IL_00eb:  nop
+    IL_00ec:  call       int32[] assembly::get_r()
+    IL_00f1:  ldc.i4.0
+    IL_00f2:  ldelem     [runtime]System.Int32
+    IL_00f7:  ldc.i4.3
+    IL_00f8:  bne.un.s   IL_00fe
+
+    IL_00fa:  ldc.i4.0
+    IL_00fb:  nop
+    IL_00fc:  br.s       IL_0100
+
+    IL_00fe:  ldc.i4.1
+    IL_00ff:  nop
+    IL_0100:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.Operators::Exit<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(int32)
+    IL_0105:  pop
+    IL_0106:  ret
   } 
 
 } 
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd04.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.il.bsl
index 7ac415a7ea3..46de1e41e75 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.il.bsl
@@ -43,8 +43,7 @@
        extends [runtime]System.Object
 {
   .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public specialname static int32[] 
-          get_r() cil managed
+  .method public specialname static int32[] get_r() cil managed
   {
     
     .maxstack  8
@@ -52,8 +51,7 @@
     IL_0005:  ret
   } 
 
-  .method public specialname static int32[] 
-          get_w() cil managed
+  .method public specialname static int32[] get_w() cil managed
   {
     
     .maxstack  8
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.opt.il.bsl
similarity index 97%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.opt.il.bsl
index 7ac415a7ea3..46de1e41e75 100644
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl
+++ b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOff.opt.il.bsl
@@ -43,8 +43,7 @@
        extends [runtime]System.Object
 {
   .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public specialname static int32[] 
-          get_r() cil managed
+  .method public specialname static int32[] get_r() cil managed
   {
     
     .maxstack  8
@@ -52,8 +51,7 @@
     IL_0005:  ret
   } 
 
-  .method public specialname static int32[] 
-          get_w() cil managed
+  .method public specialname static int32[] get_w() cil managed
   {
     
     .maxstack  8
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOn.opt.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs.opt.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/NonTrivialBranchingBindingInEnd05.fs.RealInternalSignatureOn.opt.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.debug.bsl
deleted file mode 100644
index 9bd0a4ef373..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.debug.bsl
+++ /dev/null
@@ -1,465 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test6@38
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test6@38::.ctor()
-      IL_0005:  stsfld     class assembly/test6@38 assembly/test6@38::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test7@47
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test7@47::.ctor()
-      IL_0005:  stsfld     class assembly/test7@47 assembly/test7@47::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> lst) cil managed
-  {
-    
-    .maxstack  4
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.1
-    IL_0004:  ldloc.1
-    IL_0005:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_000a:  stloc.2
-    IL_000b:  br.s       IL_0021
-
-    IL_000d:  ldloc.1
-    IL_000e:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0013:  stloc.3
-    IL_0014:  ldloc.0
-    IL_0015:  ldloc.3
-    IL_0016:  add
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.2
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  ldloc.2
-    IL_0022:  brtrue.s   IL_000d
-
-    IL_0024:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0037
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldloc.0
-    IL_002b:  ldloc.3
-    IL_002c:  add
-    IL_002d:  stloc.0
-    IL_002e:  ldloc.2
-    IL_002f:  stloc.1
-    IL_0030:  ldloc.1
-    IL_0031:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0036:  stloc.2
-    IL_0037:  ldloc.2
-    IL_0038:  brtrue.s   IL_0023
-
-    IL_003a:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldc.i4.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.0
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.1
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.1
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.0
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.0
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0049
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldstr      "%A"
-    IL_002f:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0034:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0039:  ldloc.3
-    IL_003a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003f:  pop
-    IL_0040:  ldloc.2
-    IL_0041:  stloc.1
-    IL_0042:  ldloc.1
-    IL_0043:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0048:  stloc.2
-    IL_0049:  ldloc.2
-    IL_004a:  brtrue.s   IL_0023
-
-    IL_004c:  ret
-  } 
-
-  .method public static void  test6() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2)
-    IL_0000:  ldsfld     class assembly/test6@38 assembly/test6@38::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_0057
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldstr      "%O"
-    IL_003d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0042:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0047:  ldloc.2
-    IL_0048:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004d:  pop
-    IL_004e:  ldloc.1
-    IL_004f:  stloc.0
-    IL_0050:  ldloc.0
-    IL_0051:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0056:  stloc.1
-    IL_0057:  ldloc.1
-    IL_0058:  brtrue.s   IL_0031
-
-    IL_005a:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             int32 V_3)
-    IL_0000:  ldsfld     class assembly/test7@47 assembly/test7@47::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_005b
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldloc.2
-    IL_0039:  ldc.i4.1
-    IL_003a:  add
-    IL_003b:  stloc.3
-    IL_003c:  ldstr      "%O"
-    IL_0041:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0046:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_004b:  ldloc.3
-    IL_004c:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0051:  pop
-    IL_0052:  ldloc.1
-    IL_0053:  stloc.0
-    IL_0054:  ldloc.0
-    IL_0055:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_005a:  stloc.1
-    IL_005b:  ldloc.1
-    IL_005c:  brtrue.s   IL_0031
-
-    IL_005e:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.release.bsl
deleted file mode 100644
index 626c68acbf7..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.net472.release.bsl
+++ /dev/null
@@ -1,485 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test6@38
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test6@38::.ctor()
-      IL_0005:  stsfld     class assembly/test6@38 assembly/test6@38::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test7@47
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test7@47::.ctor()
-      IL_0005:  stsfld     class assembly/test7@47 assembly/test7@47::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> lst) cil managed
-  {
-    
-    .maxstack  4
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.1
-    IL_0004:  ldloc.1
-    IL_0005:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_000a:  stloc.2
-    IL_000b:  br.s       IL_0021
-
-    IL_000d:  ldloc.1
-    IL_000e:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0013:  stloc.3
-    IL_0014:  ldloc.0
-    IL_0015:  ldloc.3
-    IL_0016:  add
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.2
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  ldloc.2
-    IL_0022:  brtrue.s   IL_000d
-
-    IL_0024:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0037
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldloc.0
-    IL_002b:  ldloc.3
-    IL_002c:  add
-    IL_002d:  stloc.0
-    IL_002e:  ldloc.2
-    IL_002f:  stloc.1
-    IL_0030:  ldloc.1
-    IL_0031:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0036:  stloc.2
-    IL_0037:  ldloc.2
-    IL_0038:  brtrue.s   IL_0023
-
-    IL_003a:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldc.i4.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.0
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.1
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.1
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.0
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.0
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0052
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldstr      "%A"
-    IL_002f:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0034:  stloc.s    V_4
-    IL_0036:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_003b:  ldloc.s    V_4
-    IL_003d:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                      class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0042:  ldloc.3
-    IL_0043:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0048:  pop
-    IL_0049:  ldloc.2
-    IL_004a:  stloc.1
-    IL_004b:  ldloc.1
-    IL_004c:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0051:  stloc.2
-    IL_0052:  ldloc.2
-    IL_0053:  brtrue.s   IL_0023
-
-    IL_0055:  ret
-  } 
-
-  .method public static void  test6() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_3)
-    IL_0000:  ldsfld     class assembly/test6@38 assembly/test6@38::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_005e
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldstr      "%O"
-    IL_003d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0042:  stloc.3
-    IL_0043:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0048:  ldloc.3
-    IL_0049:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                      class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_004e:  ldloc.2
-    IL_004f:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0054:  pop
-    IL_0055:  ldloc.1
-    IL_0056:  stloc.0
-    IL_0057:  ldloc.0
-    IL_0058:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_005d:  stloc.1
-    IL_005e:  ldloc.1
-    IL_005f:  brtrue.s   IL_0031
-
-    IL_0061:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             int32 V_3,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_4)
-    IL_0000:  ldsfld     class assembly/test7@47 assembly/test7@47::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_0064
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldloc.2
-    IL_0039:  ldc.i4.1
-    IL_003a:  add
-    IL_003b:  stloc.3
-    IL_003c:  ldstr      "%O"
-    IL_0041:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0046:  stloc.s    V_4
-    IL_0048:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_004d:  ldloc.s    V_4
-    IL_004f:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                      class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0054:  ldloc.3
-    IL_0055:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_005a:  pop
-    IL_005b:  ldloc.1
-    IL_005c:  stloc.0
-    IL_005d:  ldloc.0
-    IL_005e:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0063:  stloc.1
-    IL_0064:  ldloc.1
-    IL_0065:  brtrue.s   IL_0031
-
-    IL_0067:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.debug.bsl
deleted file mode 100644
index 9bd0a4ef373..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnList01.fs.il.netcore.debug.bsl
+++ /dev/null
@@ -1,465 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test6@38
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test6@38::.ctor()
-      IL_0005:  stsfld     class assembly/test6@38 assembly/test6@38::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test7@47
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test7@47::.ctor()
-      IL_0005:  stsfld     class assembly/test7@47 assembly/test7@47::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> lst) cil managed
-  {
-    
-    .maxstack  4
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.1
-    IL_0004:  ldloc.1
-    IL_0005:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_000a:  stloc.2
-    IL_000b:  br.s       IL_0021
-
-    IL_000d:  ldloc.1
-    IL_000e:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0013:  stloc.3
-    IL_0014:  ldloc.0
-    IL_0015:  ldloc.3
-    IL_0016:  add
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.2
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  ldloc.2
-    IL_0022:  brtrue.s   IL_000d
-
-    IL_0024:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0037
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldloc.0
-    IL_002b:  ldloc.3
-    IL_002c:  add
-    IL_002d:  stloc.0
-    IL_002e:  ldloc.2
-    IL_002f:  stloc.1
-    IL_0030:  ldloc.1
-    IL_0031:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0036:  stloc.2
-    IL_0037:  ldloc.2
-    IL_0038:  brtrue.s   IL_0023
-
-    IL_003a:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldc.i4.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.0
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.1
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.1
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.0
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.0
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0049
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldstr      "%A"
-    IL_002f:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0034:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0039:  ldloc.3
-    IL_003a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003f:  pop
-    IL_0040:  ldloc.2
-    IL_0041:  stloc.1
-    IL_0042:  ldloc.1
-    IL_0043:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0048:  stloc.2
-    IL_0049:  ldloc.2
-    IL_004a:  brtrue.s   IL_0023
-
-    IL_004c:  ret
-  } 
-
-  .method public static void  test6() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2)
-    IL_0000:  ldsfld     class assembly/test6@38 assembly/test6@38::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_0057
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldstr      "%O"
-    IL_003d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0042:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0047:  ldloc.2
-    IL_0048:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004d:  pop
-    IL_004e:  ldloc.1
-    IL_004f:  stloc.0
-    IL_0050:  ldloc.0
-    IL_0051:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0056:  stloc.1
-    IL_0057:  ldloc.1
-    IL_0058:  brtrue.s   IL_0031
-
-    IL_005a:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             int32 V_3)
-    IL_0000:  ldsfld     class assembly/test7@47 assembly/test7@47::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_005b
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldloc.2
-    IL_0039:  ldc.i4.1
-    IL_003a:  add
-    IL_003b:  stloc.3
-    IL_003c:  ldstr      "%O"
-    IL_0041:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0046:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_004b:  ldloc.3
-    IL_004c:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0051:  pop
-    IL_0052:  ldloc.1
-    IL_0053:  stloc.0
-    IL_0054:  ldloc.0
-    IL_0055:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_005a:  stloc.1
-    IL_005b:  ldloc.1
-    IL_005c:  brtrue.s   IL_0031
-
-    IL_005e:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.debug.bsl
deleted file mode 100644
index e0dc7ca6f63..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.debug.bsl
+++ /dev/null
@@ -1,556 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test8@54
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test8@54::.ctor()
-      IL_0005:  stsfld     class assembly/test8@54 assembly/test8@54::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test9@63
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test9@63::.ctor()
-      IL_0005:  stsfld     class assembly/test9@63 assembly/test9@63::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldstr      "123"
-    IL_0009:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000e:  ldc.i4.1
-    IL_000f:  sub
-    IL_0010:  stloc.1
-    IL_0011:  ldloc.1
-    IL_0012:  ldloc.2
-    IL_0013:  blt.s      IL_0030
-
-    IL_0015:  ldstr      "123"
-    IL_001a:  ldloc.2
-    IL_001b:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0020:  stloc.3
-    IL_0021:  ldloc.0
-    IL_0022:  ldloc.3
-    IL_0023:  conv.i4
-    IL_0024:  add
-    IL_0025:  stloc.0
-    IL_0026:  ldloc.2
-    IL_0027:  ldc.i4.1
-    IL_0028:  add
-    IL_0029:  stloc.2
-    IL_002a:  ldloc.2
-    IL_002b:  ldloc.1
-    IL_002c:  ldc.i4.1
-    IL_002d:  add
-    IL_002e:  bne.un.s   IL_0015
-
-    IL_0030:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  nop
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             char V_2)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.1
-    IL_0003:  ldstr      "123"
-    IL_0008:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000d:  ldc.i4.1
-    IL_000e:  sub
-    IL_000f:  stloc.0
-    IL_0010:  ldloc.0
-    IL_0011:  ldloc.1
-    IL_0012:  blt.s      IL_0040
-
-    IL_0014:  ldstr      "123"
-    IL_0019:  ldloc.1
-    IL_001a:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_001f:  stloc.2
-    IL_0020:  ldstr      "%A"
-    IL_0025:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_002a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_002f:  ldloc.2
-    IL_0030:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0035:  pop
-    IL_0036:  ldloc.1
-    IL_0037:  ldc.i4.1
-    IL_0038:  add
-    IL_0039:  stloc.1
-    IL_003a:  ldloc.1
-    IL_003b:  ldloc.0
-    IL_003c:  ldc.i4.1
-    IL_003d:  add
-    IL_003e:  bne.un.s   IL_0014
-
-    IL_0040:  ret
-  } 
-
-  .method public static void  test6(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test8() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldsfld     class assembly/test8@54 assembly/test8@54::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0047
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "%O"
-    IL_002c:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_0031:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0036:  ldloc.3
-    IL_0037:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003c:  pop
-    IL_003d:  ldloc.2
-    IL_003e:  ldc.i4.1
-    IL_003f:  add
-    IL_0040:  stloc.2
-    IL_0041:  ldloc.2
-    IL_0042:  ldloc.1
-    IL_0043:  ldc.i4.1
-    IL_0044:  add
-    IL_0045:  bne.un.s   IL_001f
-
-    IL_0047:  ret
-  } 
-
-  .method public static void  test9() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             string V_4)
-    IL_0000:  ldsfld     class assembly/test9@63 assembly/test9@63::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_005a
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "{0} foo"
-    IL_002c:  ldloc.3
-    IL_002d:  box        [runtime]System.Char
-    IL_0032:  call       string [runtime]System.String::Format(string,
-                                                                object)
-    IL_0037:  stloc.s    V_4
-    IL_0039:  ldstr      "%O"
-    IL_003e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,string>::.ctor(string)
-    IL_0043:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0048:  ldloc.s    V_4
-    IL_004a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004f:  pop
-    IL_0050:  ldloc.2
-    IL_0051:  ldc.i4.1
-    IL_0052:  add
-    IL_0053:  stloc.2
-    IL_0054:  ldloc.2
-    IL_0055:  ldloc.1
-    IL_0056:  ldc.i4.1
-    IL_0057:  add
-    IL_0058:  bne.un.s   IL_001f
-
-    IL_005a:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.release.bsl
deleted file mode 100644
index 438815ac15a..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.net472.release.bsl
+++ /dev/null
@@ -1,571 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test8@54
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test8@54::.ctor()
-      IL_0005:  stsfld     class assembly/test8@54 assembly/test8@54::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test9@63
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test9@63::.ctor()
-      IL_0005:  stsfld     class assembly/test9@63 assembly/test9@63::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldstr      "123"
-    IL_0009:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000e:  ldc.i4.1
-    IL_000f:  sub
-    IL_0010:  stloc.1
-    IL_0011:  ldloc.1
-    IL_0012:  ldloc.2
-    IL_0013:  blt.s      IL_0030
-
-    IL_0015:  ldstr      "123"
-    IL_001a:  ldloc.2
-    IL_001b:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0020:  stloc.3
-    IL_0021:  ldloc.0
-    IL_0022:  ldloc.3
-    IL_0023:  conv.i4
-    IL_0024:  add
-    IL_0025:  stloc.0
-    IL_0026:  ldloc.2
-    IL_0027:  ldc.i4.1
-    IL_0028:  add
-    IL_0029:  stloc.2
-    IL_002a:  ldloc.2
-    IL_002b:  ldloc.1
-    IL_002c:  ldc.i4.1
-    IL_002d:  add
-    IL_002e:  bne.un.s   IL_0015
-
-    IL_0030:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  nop
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             char V_2,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.1
-    IL_0003:  ldstr      "123"
-    IL_0008:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000d:  ldc.i4.1
-    IL_000e:  sub
-    IL_000f:  stloc.0
-    IL_0010:  ldloc.0
-    IL_0011:  ldloc.1
-    IL_0012:  blt.s      IL_0047
-
-    IL_0014:  ldstr      "123"
-    IL_0019:  ldloc.1
-    IL_001a:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_001f:  stloc.2
-    IL_0020:  ldstr      "%A"
-    IL_0025:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_002a:  stloc.3
-    IL_002b:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0030:  ldloc.3
-    IL_0031:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                     class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0036:  ldloc.2
-    IL_0037:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003c:  pop
-    IL_003d:  ldloc.1
-    IL_003e:  ldc.i4.1
-    IL_003f:  add
-    IL_0040:  stloc.1
-    IL_0041:  ldloc.1
-    IL_0042:  ldloc.0
-    IL_0043:  ldc.i4.1
-    IL_0044:  add
-    IL_0045:  bne.un.s   IL_0014
-
-    IL_0047:  ret
-  } 
-
-  .method public static void  test6(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test8() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_4)
-    IL_0000:  ldsfld     class assembly/test8@54 assembly/test8@54::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0050
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "%O"
-    IL_002c:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_0031:  stloc.s    V_4
-    IL_0033:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0038:  ldloc.s    V_4
-    IL_003a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                     class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_003f:  ldloc.3
-    IL_0040:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0045:  pop
-    IL_0046:  ldloc.2
-    IL_0047:  ldc.i4.1
-    IL_0048:  add
-    IL_0049:  stloc.2
-    IL_004a:  ldloc.2
-    IL_004b:  ldloc.1
-    IL_004c:  ldc.i4.1
-    IL_004d:  add
-    IL_004e:  bne.un.s   IL_001f
-
-    IL_0050:  ret
-  } 
-
-  .method public static void  test9() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             string V_4,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_5)
-    IL_0000:  ldsfld     class assembly/test9@63 assembly/test9@63::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0063
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "{0} foo"
-    IL_002c:  ldloc.3
-    IL_002d:  box        [runtime]System.Char
-    IL_0032:  call       string [runtime]System.String::Format(string,
-                                                                object)
-    IL_0037:  stloc.s    V_4
-    IL_0039:  ldstr      "%O"
-    IL_003e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,string>::.ctor(string)
-    IL_0043:  stloc.s    V_5
-    IL_0045:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_004a:  ldloc.s    V_5
-    IL_004c:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                       class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0051:  ldloc.s    V_4
-    IL_0053:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0058:  pop
-    IL_0059:  ldloc.2
-    IL_005a:  ldc.i4.1
-    IL_005b:  add
-    IL_005c:  stloc.2
-    IL_005d:  ldloc.2
-    IL_005e:  ldloc.1
-    IL_005f:  ldc.i4.1
-    IL_0060:  add
-    IL_0061:  bne.un.s   IL_001f
-
-    IL_0063:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.debug.bsl
deleted file mode 100644
index c56fef87382..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForEachOnString01.fs.il.netcore.debug.bsl
+++ /dev/null
@@ -1,556 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:1:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test8@54
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test8@54::.ctor()
-      IL_0005:  stsfld     class assembly/test8@54 assembly/test8@54::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test9@63
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test9@63::.ctor()
-      IL_0005:  stsfld     class assembly/test9@63 assembly/test9@63::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldstr      "123"
-    IL_0009:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000e:  ldc.i4.1
-    IL_000f:  sub
-    IL_0010:  stloc.1
-    IL_0011:  ldloc.1
-    IL_0012:  ldloc.2
-    IL_0013:  blt.s      IL_0030
-
-    IL_0015:  ldstr      "123"
-    IL_001a:  ldloc.2
-    IL_001b:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0020:  stloc.3
-    IL_0021:  ldloc.0
-    IL_0022:  ldloc.3
-    IL_0023:  conv.i4
-    IL_0024:  add
-    IL_0025:  stloc.0
-    IL_0026:  ldloc.2
-    IL_0027:  ldc.i4.1
-    IL_0028:  add
-    IL_0029:  stloc.2
-    IL_002a:  ldloc.2
-    IL_002b:  ldloc.1
-    IL_002c:  ldc.i4.1
-    IL_002d:  add
-    IL_002e:  bne.un.s   IL_0015
-
-    IL_0030:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  nop
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             char V_2)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.1
-    IL_0003:  ldstr      "123"
-    IL_0008:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000d:  ldc.i4.1
-    IL_000e:  sub
-    IL_000f:  stloc.0
-    IL_0010:  ldloc.0
-    IL_0011:  ldloc.1
-    IL_0012:  blt.s      IL_0040
-
-    IL_0014:  ldstr      "123"
-    IL_0019:  ldloc.1
-    IL_001a:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_001f:  stloc.2
-    IL_0020:  ldstr      "%A"
-    IL_0025:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_002a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_002f:  ldloc.2
-    IL_0030:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0035:  pop
-    IL_0036:  ldloc.1
-    IL_0037:  ldc.i4.1
-    IL_0038:  add
-    IL_0039:  stloc.1
-    IL_003a:  ldloc.1
-    IL_003b:  ldloc.0
-    IL_003c:  ldc.i4.1
-    IL_003d:  add
-    IL_003e:  bne.un.s   IL_0014
-
-    IL_0040:  ret
-  } 
-
-  .method public static void  test6(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test8() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldsfld     class assembly/test8@54 assembly/test8@54::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0047
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "%O"
-    IL_002c:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_0031:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0036:  ldloc.3
-    IL_0037:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003c:  pop
-    IL_003d:  ldloc.2
-    IL_003e:  ldc.i4.1
-    IL_003f:  add
-    IL_0040:  stloc.2
-    IL_0041:  ldloc.2
-    IL_0042:  ldloc.1
-    IL_0043:  ldc.i4.1
-    IL_0044:  add
-    IL_0045:  bne.un.s   IL_001f
-
-    IL_0047:  ret
-  } 
-
-  .method public static void  test9() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             string V_4)
-    IL_0000:  ldsfld     class assembly/test9@63 assembly/test9@63::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_005a
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "{0} foo"
-    IL_002c:  ldloc.3
-    IL_002d:  box        [runtime]System.Char
-    IL_0032:  call       string [runtime]System.String::Format(string,
-                                                                      object)
-    IL_0037:  stloc.s    V_4
-    IL_0039:  ldstr      "%O"
-    IL_003e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,string>::.ctor(string)
-    IL_0043:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0048:  ldloc.s    V_4
-    IL_004a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004f:  pop
-    IL_0050:  ldloc.2
-    IL_0051:  ldc.i4.1
-    IL_0052:  add
-    IL_0053:  stloc.2
-    IL_0054:  ldloc.2
-    IL_0055:  ldloc.1
-    IL_0056:  ldc.i4.1
-    IL_0057:  add
-    IL_0058:  bne.un.s   IL_001f
-
-    IL_005a:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForLoop.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForLoop.fs
deleted file mode 100644
index 69d37924d10..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ForLoop.fs
+++ /dev/null
@@ -1,216 +0,0 @@
-namespace EmittedIL.RealInternalSignature
-
-open Xunit
-open FSharp.Test
-open FSharp.Test.Compiler
-
-module ForLoopRealInternalSignatureOff =
-
-    let verifyCompilation compilation =
-        compilation
-        |> withOptions [ "--test:EmitFeeFeeAs100001" ]
-        |> asExe
-        |> withOptimize
-        |> withEmbeddedPdb
-        |> withEmbedAllSource
-        |> ignoreWarnings
-        |> withRealInternalSignatureOff
-        |> verifyILBaseline
-
-    // SOURCE=NoAllocationOfTuple01.fs SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoAllocationOfTuple01.dll" # NoAllocationOfTuple01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoAllocationOfTuple01.fs"|])>]
-    let ``NoAllocationOfTuple01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachOnArray01.fs      SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnArray01.dll"      # ForEachOnArray01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ForEachOnArray01.fs"|])>]
-    let ``ForEachOnArray01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachOnList01.fs       SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnList01.dll"       # ForEachOnList01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ForEachOnList01.fs"|])>]
-    let ``ForEachOnList01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachOnString01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnString01.dll"     # ForEachOnString01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ForEachOnString01.fs"|])>]
-    let ``ForEachOnString01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ZeroToArrLength01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength01.dll"     # ZeroToArrLength01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ZeroToArrLength01.fs"|])>]
-    let ``ZeroToArrLength01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ZeroToArrLength02.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength02.dll"     # ZeroToArrLength02.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ZeroToArrLength02.fs"|])>]
-    let ``ZeroToArrLength02_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NoIEnumerable01.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable01.dll"            # NoIEnumerable01.fsx
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoIEnumerable01.fsx"|])>]
-    let ``NoIEnumerable01_fsx`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NoIEnumerable02.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable02.dll"            # NoIEnumerable02.fsx
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoIEnumerable02.fsx"|])>]
-    let ``NoIEnumerable02_fsx`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NoIEnumerable03.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable03.dll"            # NoIEnumerable03.fsx
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoIEnumerable03.fsx"|])>]
-    let ``NoIEnumerable03_fsx`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd01.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd01_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd01.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd01_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd02.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd02_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd02.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd02_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd03.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd03_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd03.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd03_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd04.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd04_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd04.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd04_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd05.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd05_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd05.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd05_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepSByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepSByte.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepSByte.fs"|])>]
-    let ``ForEachRangeStepSByte_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepByte.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepByte.fs"|])>]
-    let ``ForEachRangeStepByte_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepChar.fs SCFLAGS="--optimize+"	# ForEachRangeStepChar.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepChar.fs"|])>]
-    let ``ForEachRangeStepChar_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt16.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepInt16.fs"|])>]
-    let ``ForEachRangeStepInt16_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt16.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUInt16.fs"|])>]
-    let ``ForEachRangeStepUInt16_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt32.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepInt32.fs"|])>]
-    let ``ForEachRangeStepInt32_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt32.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUInt32.fs"|])>]
-    let ``ForEachRangeStepUInt32_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt64.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepInt64.fs"|])>]
-    let ``ForEachRangeStepInt64_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt64.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUInt64.fs"|])>]
-    let ``ForEachRangeStepUInt64_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepIntPtr.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepIntPtr.fs"|])>]
-    let ``ForEachRangeStepIntPtr_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepUIntPtr.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUIntPtr.fs"|])>]
-    let ``ForEachRangeStepUIntPtr_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStep_UnitsOfMeasure.fs SCFLAGS="--optimize+"	# ForEachRangeStep_UnitsOfMeasure.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStep_UnitsOfMeasure.fs"|])>]
-    let ``ForEachRangeStep_UnitsOfMeasure_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.debug.bsl
deleted file mode 100644
index 4c0acb5b6ba..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop1(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.1
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.release.bsl
deleted file mode 100644
index 1c1f3221262..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.net472.release.bsl
+++ /dev/null
@@ -1,106 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop1(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_2)
-    IL_0000:  ldc.i4.1
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0029
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  stloc.2
-    IL_0013:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0018:  ldloc.2
-    IL_0019:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                         class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_001e:  pop
-    IL_001f:  ldloc.1
-    IL_0020:  ldc.i4.1
-    IL_0021:  add
-    IL_0022:  stloc.1
-    IL_0023:  ldloc.1
-    IL_0024:  ldloc.0
-    IL_0025:  ldc.i4.1
-    IL_0026:  add
-    IL_0027:  bne.un.s   IL_0008
-
-    IL_0029:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.debug.bsl
deleted file mode 100644
index 4c0acb5b6ba..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable01.fsx.il.netcore.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop1(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.1
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.debug.bsl
deleted file mode 100644
index e31d59290d9..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop2(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.s   100
-    IL_0002:  stloc.1
-    IL_0003:  ldarg.0
-    IL_0004:  stloc.0
-    IL_0005:  ldloc.0
-    IL_0006:  ldloc.1
-    IL_0007:  blt.s      IL_0023
-
-    IL_0009:  ldstr      "aaa"
-    IL_000e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0013:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0018:  pop
-    IL_0019:  ldloc.1
-    IL_001a:  ldc.i4.1
-    IL_001b:  add
-    IL_001c:  stloc.1
-    IL_001d:  ldloc.1
-    IL_001e:  ldloc.0
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  bne.un.s   IL_0009
-
-    IL_0023:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.release.bsl
deleted file mode 100644
index 5db215b7499..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.net472.release.bsl
+++ /dev/null
@@ -1,106 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop2(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_2)
-    IL_0000:  ldc.i4.s   100
-    IL_0002:  stloc.1
-    IL_0003:  ldarg.0
-    IL_0004:  stloc.0
-    IL_0005:  ldloc.0
-    IL_0006:  ldloc.1
-    IL_0007:  blt.s      IL_002a
-
-    IL_0009:  ldstr      "aaa"
-    IL_000e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0013:  stloc.2
-    IL_0014:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0019:  ldloc.2
-    IL_001a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                         class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_001f:  pop
-    IL_0020:  ldloc.1
-    IL_0021:  ldc.i4.1
-    IL_0022:  add
-    IL_0023:  stloc.1
-    IL_0024:  ldloc.1
-    IL_0025:  ldloc.0
-    IL_0026:  ldc.i4.1
-    IL_0027:  add
-    IL_0028:  bne.un.s   IL_0009
-
-    IL_002a:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.debug.bsl
deleted file mode 100644
index e31d59290d9..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable02.fsx.il.netcore.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop2(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.s   100
-    IL_0002:  stloc.1
-    IL_0003:  ldarg.0
-    IL_0004:  stloc.0
-    IL_0005:  ldloc.0
-    IL_0006:  ldloc.1
-    IL_0007:  blt.s      IL_0023
-
-    IL_0009:  ldstr      "aaa"
-    IL_000e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0013:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0018:  pop
-    IL_0019:  ldloc.1
-    IL_001a:  ldc.i4.1
-    IL_001b:  add
-    IL_001c:  stloc.1
-    IL_001d:  ldloc.1
-    IL_001e:  ldloc.0
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  bne.un.s   IL_0009
-
-    IL_0023:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.debug.bsl
deleted file mode 100644
index c580ba49eec..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.debug.bsl
+++ /dev/null
@@ -1,98 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop3(int32 a,
-                                    int32 N) cil managed
-  {
-    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationArgumentCountsAttribute::.ctor(int32[]) = ( 01 00 02 00 00 00 01 00 00 00 01 00 00 00 00 00 ) 
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldarg.0
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.1
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.release.bsl
deleted file mode 100644
index 30f24778b50..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.net472.release.bsl
+++ /dev/null
@@ -1,108 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop3(int32 a,
-                                    int32 N) cil managed
-  {
-    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationArgumentCountsAttribute::.ctor(int32[]) = ( 01 00 02 00 00 00 01 00 00 00 01 00 00 00 00 00 ) 
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_2)
-    IL_0000:  ldarg.0
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.1
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0029
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  stloc.2
-    IL_0013:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0018:  ldloc.2
-    IL_0019:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                         class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_001e:  pop
-    IL_001f:  ldloc.1
-    IL_0020:  ldc.i4.1
-    IL_0021:  add
-    IL_0022:  stloc.1
-    IL_0023:  ldloc.1
-    IL_0024:  ldloc.0
-    IL_0025:  ldc.i4.1
-    IL_0026:  add
-    IL_0027:  bne.un.s   IL_0008
-
-    IL_0029:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.debug.bsl
deleted file mode 100644
index c580ba49eec..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/NoIEnumerable03.fsx.il.netcore.debug.bsl
+++ /dev/null
@@ -1,98 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop3(int32 a,
-                                    int32 N) cil managed
-  {
-    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationArgumentCountsAttribute::.ctor(int32[]) = ( 01 00 02 00 00 00 01 00 00 00 01 00 00 00 00 00 ) 
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldarg.0
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.1
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnArray01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnArray01.fs
deleted file mode 100644
index ad9a9e104b5..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnArray01.fs
+++ /dev/null
@@ -1,8 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-// Regression test for FSHARP1.0:3982
-// Compiler should turn 'foreach' loops over arrays into 'for' loops
-module ForEachOnArray01
-let test3(arr: int[]) = 
-     let mutable z = 0
-     for x in arr do
-         z <- z + x
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs
deleted file mode 100644
index 942d99c3234..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs
+++ /dev/null
@@ -1,51 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT
-// Compiler should turn 'foreach' loops over lists into 'while' loops
-module ForEachOnList01
-
-// Some variations to make sure optimizer can detect the foreach properly
-
-let test1(lst: int list) =
-     let mutable z = 0
-     for x in lst do
-         z <- z + x
-
-let test2() =
-     let mutable z = 0
-     for x in [1;2;3] do
-         z <- z + x
-
-let test3() =
-     let xs = [1;2;3]
-     let mutable z = 0
-     for x in xs do
-         z <- z + x
-
-let test4() =
-     let mutable z = 0
-     let xs = [1;2;3]
-     for x in xs do
-         z <- z + x
-
-let test5() =
-     let xs = [1;2;3]
-     for x in xs do
-         printfn "%A" x
-
-// more complex enumerable expression
-let test6() = 
-    for i in (
-                [1;2;3;4]
-                |> List.map (fun x ->
-                    x + 1)
-                ) do
-        printfn "%O" i
- 
-// multiline body 
-let test7() = 
-    for i in (
-                [1;2;3;4]
-                |> List.map (fun x ->
-                    x + 1)
-                ) do
-        let tmp = i + 1
-        printfn "%O" tmp
\ No newline at end of file
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.debug.bsl
deleted file mode 100644
index 9bd0a4ef373..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.debug.bsl
+++ /dev/null
@@ -1,465 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test6@38
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test6@38::.ctor()
-      IL_0005:  stsfld     class assembly/test6@38 assembly/test6@38::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test7@47
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test7@47::.ctor()
-      IL_0005:  stsfld     class assembly/test7@47 assembly/test7@47::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> lst) cil managed
-  {
-    
-    .maxstack  4
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.1
-    IL_0004:  ldloc.1
-    IL_0005:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_000a:  stloc.2
-    IL_000b:  br.s       IL_0021
-
-    IL_000d:  ldloc.1
-    IL_000e:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0013:  stloc.3
-    IL_0014:  ldloc.0
-    IL_0015:  ldloc.3
-    IL_0016:  add
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.2
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  ldloc.2
-    IL_0022:  brtrue.s   IL_000d
-
-    IL_0024:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0037
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldloc.0
-    IL_002b:  ldloc.3
-    IL_002c:  add
-    IL_002d:  stloc.0
-    IL_002e:  ldloc.2
-    IL_002f:  stloc.1
-    IL_0030:  ldloc.1
-    IL_0031:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0036:  stloc.2
-    IL_0037:  ldloc.2
-    IL_0038:  brtrue.s   IL_0023
-
-    IL_003a:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldc.i4.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.0
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.1
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.1
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.0
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.0
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0049
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldstr      "%A"
-    IL_002f:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0034:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0039:  ldloc.3
-    IL_003a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003f:  pop
-    IL_0040:  ldloc.2
-    IL_0041:  stloc.1
-    IL_0042:  ldloc.1
-    IL_0043:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0048:  stloc.2
-    IL_0049:  ldloc.2
-    IL_004a:  brtrue.s   IL_0023
-
-    IL_004c:  ret
-  } 
-
-  .method public static void  test6() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2)
-    IL_0000:  ldsfld     class assembly/test6@38 assembly/test6@38::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_0057
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldstr      "%O"
-    IL_003d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0042:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0047:  ldloc.2
-    IL_0048:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004d:  pop
-    IL_004e:  ldloc.1
-    IL_004f:  stloc.0
-    IL_0050:  ldloc.0
-    IL_0051:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0056:  stloc.1
-    IL_0057:  ldloc.1
-    IL_0058:  brtrue.s   IL_0031
-
-    IL_005a:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             int32 V_3)
-    IL_0000:  ldsfld     class assembly/test7@47 assembly/test7@47::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_005b
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldloc.2
-    IL_0039:  ldc.i4.1
-    IL_003a:  add
-    IL_003b:  stloc.3
-    IL_003c:  ldstr      "%O"
-    IL_0041:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0046:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_004b:  ldloc.3
-    IL_004c:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0051:  pop
-    IL_0052:  ldloc.1
-    IL_0053:  stloc.0
-    IL_0054:  ldloc.0
-    IL_0055:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_005a:  stloc.1
-    IL_005b:  ldloc.1
-    IL_005c:  brtrue.s   IL_0031
-
-    IL_005e:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.release.bsl
deleted file mode 100644
index 626c68acbf7..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.net472.release.bsl
+++ /dev/null
@@ -1,485 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test6@38
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test6@38::.ctor()
-      IL_0005:  stsfld     class assembly/test6@38 assembly/test6@38::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test7@47
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test7@47::.ctor()
-      IL_0005:  stsfld     class assembly/test7@47 assembly/test7@47::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> lst) cil managed
-  {
-    
-    .maxstack  4
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.1
-    IL_0004:  ldloc.1
-    IL_0005:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_000a:  stloc.2
-    IL_000b:  br.s       IL_0021
-
-    IL_000d:  ldloc.1
-    IL_000e:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0013:  stloc.3
-    IL_0014:  ldloc.0
-    IL_0015:  ldloc.3
-    IL_0016:  add
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.2
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  ldloc.2
-    IL_0022:  brtrue.s   IL_000d
-
-    IL_0024:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0037
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldloc.0
-    IL_002b:  ldloc.3
-    IL_002c:  add
-    IL_002d:  stloc.0
-    IL_002e:  ldloc.2
-    IL_002f:  stloc.1
-    IL_0030:  ldloc.1
-    IL_0031:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0036:  stloc.2
-    IL_0037:  ldloc.2
-    IL_0038:  brtrue.s   IL_0023
-
-    IL_003a:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldc.i4.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.0
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.1
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.1
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.0
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.0
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0052
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldstr      "%A"
-    IL_002f:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0034:  stloc.s    V_4
-    IL_0036:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_003b:  ldloc.s    V_4
-    IL_003d:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                      class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0042:  ldloc.3
-    IL_0043:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0048:  pop
-    IL_0049:  ldloc.2
-    IL_004a:  stloc.1
-    IL_004b:  ldloc.1
-    IL_004c:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0051:  stloc.2
-    IL_0052:  ldloc.2
-    IL_0053:  brtrue.s   IL_0023
-
-    IL_0055:  ret
-  } 
-
-  .method public static void  test6() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_3)
-    IL_0000:  ldsfld     class assembly/test6@38 assembly/test6@38::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_005e
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldstr      "%O"
-    IL_003d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0042:  stloc.3
-    IL_0043:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0048:  ldloc.3
-    IL_0049:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                      class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_004e:  ldloc.2
-    IL_004f:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0054:  pop
-    IL_0055:  ldloc.1
-    IL_0056:  stloc.0
-    IL_0057:  ldloc.0
-    IL_0058:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_005d:  stloc.1
-    IL_005e:  ldloc.1
-    IL_005f:  brtrue.s   IL_0031
-
-    IL_0061:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             int32 V_3,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_4)
-    IL_0000:  ldsfld     class assembly/test7@47 assembly/test7@47::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_0064
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldloc.2
-    IL_0039:  ldc.i4.1
-    IL_003a:  add
-    IL_003b:  stloc.3
-    IL_003c:  ldstr      "%O"
-    IL_0041:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0046:  stloc.s    V_4
-    IL_0048:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_004d:  ldloc.s    V_4
-    IL_004f:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                      class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0054:  ldloc.3
-    IL_0055:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_005a:  pop
-    IL_005b:  ldloc.1
-    IL_005c:  stloc.0
-    IL_005d:  ldloc.0
-    IL_005e:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0063:  stloc.1
-    IL_0064:  ldloc.1
-    IL_0065:  brtrue.s   IL_0031
-
-    IL_0067:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.debug.bsl
deleted file mode 100644
index 9bd0a4ef373..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnList01.fs.il.netcore.debug.bsl
+++ /dev/null
@@ -1,465 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test6@38
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test6@38 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test6@38::.ctor()
-      IL_0005:  stsfld     class assembly/test6@38 assembly/test6@38::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test7@47
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>
-  {
-    .field static assembly initonly class assembly/test7@47 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,int32>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance int32 
-            Invoke(int32 x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  ldc.i4.1
-      IL_0002:  add
-      IL_0003:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test7@47::.ctor()
-      IL_0005:  stsfld     class assembly/test7@47 assembly/test7@47::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> lst) cil managed
-  {
-    
-    .maxstack  4
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.1
-    IL_0004:  ldloc.1
-    IL_0005:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_000a:  stloc.2
-    IL_000b:  br.s       IL_0021
-
-    IL_000d:  ldloc.1
-    IL_000e:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0013:  stloc.3
-    IL_0014:  ldloc.0
-    IL_0015:  ldloc.3
-    IL_0016:  add
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.2
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  ldloc.2
-    IL_0022:  brtrue.s   IL_000d
-
-    IL_0024:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0037
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldloc.0
-    IL_002b:  ldloc.3
-    IL_002c:  add
-    IL_002d:  stloc.0
-    IL_002e:  ldloc.2
-    IL_002f:  stloc.1
-    IL_0030:  ldloc.1
-    IL_0031:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0036:  stloc.2
-    IL_0037:  ldloc.2
-    IL_0038:  brtrue.s   IL_0023
-
-    IL_003a:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldc.i4.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.0
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.1
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.1
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (int32 V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_3,
-             int32 V_4)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.1
-    IL_0003:  ldc.i4.2
-    IL_0004:  ldc.i4.3
-    IL_0005:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000a:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000f:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0014:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  stloc.2
-    IL_001c:  ldloc.2
-    IL_001d:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0022:  stloc.3
-    IL_0023:  br.s       IL_003b
-
-    IL_0025:  ldloc.2
-    IL_0026:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_002b:  stloc.s    V_4
-    IL_002d:  ldloc.0
-    IL_002e:  ldloc.s    V_4
-    IL_0030:  add
-    IL_0031:  stloc.0
-    IL_0032:  ldloc.3
-    IL_0033:  stloc.2
-    IL_0034:  ldloc.2
-    IL_0035:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_003a:  stloc.3
-    IL_003b:  ldloc.3
-    IL_003c:  brtrue.s   IL_0025
-
-    IL_003e:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  6
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_2,
-             int32 V_3)
-    IL_0000:  ldc.i4.1
-    IL_0001:  ldc.i4.2
-    IL_0002:  ldc.i4.3
-    IL_0003:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_0008:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_000d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0012:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0017:  stloc.0
-    IL_0018:  ldloc.0
-    IL_0019:  stloc.1
-    IL_001a:  ldloc.1
-    IL_001b:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0020:  stloc.2
-    IL_0021:  br.s       IL_0049
-
-    IL_0023:  ldloc.1
-    IL_0024:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0029:  stloc.3
-    IL_002a:  ldstr      "%A"
-    IL_002f:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0034:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0039:  ldloc.3
-    IL_003a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003f:  pop
-    IL_0040:  ldloc.2
-    IL_0041:  stloc.1
-    IL_0042:  ldloc.1
-    IL_0043:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0048:  stloc.2
-    IL_0049:  ldloc.2
-    IL_004a:  brtrue.s   IL_0023
-
-    IL_004c:  ret
-  } 
-
-  .method public static void  test6() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2)
-    IL_0000:  ldsfld     class assembly/test6@38 assembly/test6@38::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_0057
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldstr      "%O"
-    IL_003d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0042:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0047:  ldloc.2
-    IL_0048:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004d:  pop
-    IL_004e:  ldloc.1
-    IL_004f:  stloc.0
-    IL_0050:  ldloc.0
-    IL_0051:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_0056:  stloc.1
-    IL_0057:  ldloc.1
-    IL_0058:  brtrue.s   IL_0031
-
-    IL_005a:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  8
-    .locals init (class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_0,
-             class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32> V_1,
-             int32 V_2,
-             int32 V_3)
-    IL_0000:  ldsfld     class assembly/test7@47 assembly/test7@47::@_instance
-    IL_0005:  ldc.i4.1
-    IL_0006:  ldc.i4.2
-    IL_0007:  ldc.i4.3
-    IL_0008:  ldc.i4.4
-    IL_0009:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_Empty()
-    IL_000e:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0013:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0018:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_001d:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::Cons(!0,
-                                                                                                                                                                    class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0>)
-    IL_0022:  call       class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!1> [FSharp.Core]Microsoft.FSharp.Collections.ListModule::Map<int32,int32>(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<!!0,!!1>,
-                                                                                                                                                                  class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!!0>)
-    IL_0027:  stloc.0
-    IL_0028:  ldloc.0
-    IL_0029:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_002e:  stloc.1
-    IL_002f:  br.s       IL_005b
-
-    IL_0031:  ldloc.0
-    IL_0032:  call       instance !0 class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_HeadOrDefault()
-    IL_0037:  stloc.2
-    IL_0038:  ldloc.2
-    IL_0039:  ldc.i4.1
-    IL_003a:  add
-    IL_003b:  stloc.3
-    IL_003c:  ldstr      "%O"
-    IL_0041:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,int32>::.ctor(string)
-    IL_0046:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_004b:  ldloc.3
-    IL_004c:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0051:  pop
-    IL_0052:  ldloc.1
-    IL_0053:  stloc.0
-    IL_0054:  ldloc.0
-    IL_0055:  call       instance class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<!0> class [FSharp.Core]Microsoft.FSharp.Collections.FSharpList`1<int32>::get_TailOrNull()
-    IL_005a:  stloc.1
-    IL_005b:  ldloc.1
-    IL_005c:  brtrue.s   IL_0031
-
-    IL_005e:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs
deleted file mode 100644
index 04262a04e63..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs
+++ /dev/null
@@ -1,67 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT
-// Compiler should turn 'foreach' loops over strings into 'for' loops
-module ForEachOnString01
-
-open System
-
-let test1(str: string) =
-     let mutable z = 0
-     for x in str do
-         z <- z + (int x)
-
-let test2() =
-     let mutable z = 0
-     for x in "123" do
-         z <- z + (int x)
-
-let test3() =
-     let xs = "123"
-     let mutable z = 0
-     for x in xs do
-         z <- z + (int x)
-
-let test4() =
-     let mutable z = 0
-     let xs = "123"
-     for x in xs do
-         z <- z + (int x)
-
-let test5() =
-     let xs = "123"
-     for x in xs do
-         printfn "%A" x
-
-// test6, test7 makes sure the optimization triggers
-// for System.String and String as well.
-// They are the same type as string but internally string
-// is an alias which potentially could make the optimizer
-// miss one case or the other
-let test6(str: System.String) =
-     let mutable z = 0
-     for x in str do
-         z <- z + (int x)
-
-let test7() =
-     let xs : String = "123"
-     let mutable z = 0
-     for x in xs do
-         z <- z + (int x)
-
-// more complex enumerable expression
-let test8() =
-    for i in (
-                "1234"
-                |> String.map (fun x ->
-                    char ((int x) + 1))
-                ) do
-        printfn "%O" i
-
-// multiline body
-let test9() =
-    for i in (
-                "1234"
-                |> String.map (fun x ->
-                    char ((int x) + 1))
-                ) do
-        let tmp = System.String.Format("{0} foo", i)
-        printfn "%O" tmp
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.debug.bsl
deleted file mode 100644
index e0dc7ca6f63..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.debug.bsl
+++ /dev/null
@@ -1,556 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test8@54
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test8@54::.ctor()
-      IL_0005:  stsfld     class assembly/test8@54 assembly/test8@54::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test9@63
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test9@63::.ctor()
-      IL_0005:  stsfld     class assembly/test9@63 assembly/test9@63::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldstr      "123"
-    IL_0009:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000e:  ldc.i4.1
-    IL_000f:  sub
-    IL_0010:  stloc.1
-    IL_0011:  ldloc.1
-    IL_0012:  ldloc.2
-    IL_0013:  blt.s      IL_0030
-
-    IL_0015:  ldstr      "123"
-    IL_001a:  ldloc.2
-    IL_001b:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0020:  stloc.3
-    IL_0021:  ldloc.0
-    IL_0022:  ldloc.3
-    IL_0023:  conv.i4
-    IL_0024:  add
-    IL_0025:  stloc.0
-    IL_0026:  ldloc.2
-    IL_0027:  ldc.i4.1
-    IL_0028:  add
-    IL_0029:  stloc.2
-    IL_002a:  ldloc.2
-    IL_002b:  ldloc.1
-    IL_002c:  ldc.i4.1
-    IL_002d:  add
-    IL_002e:  bne.un.s   IL_0015
-
-    IL_0030:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  nop
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             char V_2)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.1
-    IL_0003:  ldstr      "123"
-    IL_0008:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000d:  ldc.i4.1
-    IL_000e:  sub
-    IL_000f:  stloc.0
-    IL_0010:  ldloc.0
-    IL_0011:  ldloc.1
-    IL_0012:  blt.s      IL_0040
-
-    IL_0014:  ldstr      "123"
-    IL_0019:  ldloc.1
-    IL_001a:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_001f:  stloc.2
-    IL_0020:  ldstr      "%A"
-    IL_0025:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_002a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_002f:  ldloc.2
-    IL_0030:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0035:  pop
-    IL_0036:  ldloc.1
-    IL_0037:  ldc.i4.1
-    IL_0038:  add
-    IL_0039:  stloc.1
-    IL_003a:  ldloc.1
-    IL_003b:  ldloc.0
-    IL_003c:  ldc.i4.1
-    IL_003d:  add
-    IL_003e:  bne.un.s   IL_0014
-
-    IL_0040:  ret
-  } 
-
-  .method public static void  test6(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test8() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldsfld     class assembly/test8@54 assembly/test8@54::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0047
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "%O"
-    IL_002c:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_0031:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0036:  ldloc.3
-    IL_0037:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003c:  pop
-    IL_003d:  ldloc.2
-    IL_003e:  ldc.i4.1
-    IL_003f:  add
-    IL_0040:  stloc.2
-    IL_0041:  ldloc.2
-    IL_0042:  ldloc.1
-    IL_0043:  ldc.i4.1
-    IL_0044:  add
-    IL_0045:  bne.un.s   IL_001f
-
-    IL_0047:  ret
-  } 
-
-  .method public static void  test9() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             string V_4)
-    IL_0000:  ldsfld     class assembly/test9@63 assembly/test9@63::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_005a
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "{0} foo"
-    IL_002c:  ldloc.3
-    IL_002d:  box        [runtime]System.Char
-    IL_0032:  call       string [runtime]System.String::Format(string,
-                                                                object)
-    IL_0037:  stloc.s    V_4
-    IL_0039:  ldstr      "%O"
-    IL_003e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,string>::.ctor(string)
-    IL_0043:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0048:  ldloc.s    V_4
-    IL_004a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004f:  pop
-    IL_0050:  ldloc.2
-    IL_0051:  ldc.i4.1
-    IL_0052:  add
-    IL_0053:  stloc.2
-    IL_0054:  ldloc.2
-    IL_0055:  ldloc.1
-    IL_0056:  ldc.i4.1
-    IL_0057:  add
-    IL_0058:  bne.un.s   IL_001f
-
-    IL_005a:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.release.bsl
deleted file mode 100644
index 438815ac15a..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.net472.release.bsl
+++ /dev/null
@@ -1,571 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test8@54
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test8@54::.ctor()
-      IL_0005:  stsfld     class assembly/test8@54 assembly/test8@54::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test9@63
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test9@63::.ctor()
-      IL_0005:  stsfld     class assembly/test9@63 assembly/test9@63::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldstr      "123"
-    IL_0009:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000e:  ldc.i4.1
-    IL_000f:  sub
-    IL_0010:  stloc.1
-    IL_0011:  ldloc.1
-    IL_0012:  ldloc.2
-    IL_0013:  blt.s      IL_0030
-
-    IL_0015:  ldstr      "123"
-    IL_001a:  ldloc.2
-    IL_001b:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0020:  stloc.3
-    IL_0021:  ldloc.0
-    IL_0022:  ldloc.3
-    IL_0023:  conv.i4
-    IL_0024:  add
-    IL_0025:  stloc.0
-    IL_0026:  ldloc.2
-    IL_0027:  ldc.i4.1
-    IL_0028:  add
-    IL_0029:  stloc.2
-    IL_002a:  ldloc.2
-    IL_002b:  ldloc.1
-    IL_002c:  ldc.i4.1
-    IL_002d:  add
-    IL_002e:  bne.un.s   IL_0015
-
-    IL_0030:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  nop
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             char V_2,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.1
-    IL_0003:  ldstr      "123"
-    IL_0008:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000d:  ldc.i4.1
-    IL_000e:  sub
-    IL_000f:  stloc.0
-    IL_0010:  ldloc.0
-    IL_0011:  ldloc.1
-    IL_0012:  blt.s      IL_0047
-
-    IL_0014:  ldstr      "123"
-    IL_0019:  ldloc.1
-    IL_001a:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_001f:  stloc.2
-    IL_0020:  ldstr      "%A"
-    IL_0025:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_002a:  stloc.3
-    IL_002b:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0030:  ldloc.3
-    IL_0031:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                     class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0036:  ldloc.2
-    IL_0037:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003c:  pop
-    IL_003d:  ldloc.1
-    IL_003e:  ldc.i4.1
-    IL_003f:  add
-    IL_0040:  stloc.1
-    IL_0041:  ldloc.1
-    IL_0042:  ldloc.0
-    IL_0043:  ldc.i4.1
-    IL_0044:  add
-    IL_0045:  bne.un.s   IL_0014
-
-    IL_0047:  ret
-  } 
-
-  .method public static void  test6(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test8() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_4)
-    IL_0000:  ldsfld     class assembly/test8@54 assembly/test8@54::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0050
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "%O"
-    IL_002c:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_0031:  stloc.s    V_4
-    IL_0033:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0038:  ldloc.s    V_4
-    IL_003a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                     class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_003f:  ldloc.3
-    IL_0040:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0045:  pop
-    IL_0046:  ldloc.2
-    IL_0047:  ldc.i4.1
-    IL_0048:  add
-    IL_0049:  stloc.2
-    IL_004a:  ldloc.2
-    IL_004b:  ldloc.1
-    IL_004c:  ldc.i4.1
-    IL_004d:  add
-    IL_004e:  bne.un.s   IL_001f
-
-    IL_0050:  ret
-  } 
-
-  .method public static void  test9() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             string V_4,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_5)
-    IL_0000:  ldsfld     class assembly/test9@63 assembly/test9@63::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0063
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "{0} foo"
-    IL_002c:  ldloc.3
-    IL_002d:  box        [runtime]System.Char
-    IL_0032:  call       string [runtime]System.String::Format(string,
-                                                                object)
-    IL_0037:  stloc.s    V_4
-    IL_0039:  ldstr      "%O"
-    IL_003e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,string>::.ctor(string)
-    IL_0043:  stloc.s    V_5
-    IL_0045:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_004a:  ldloc.s    V_5
-    IL_004c:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                                                                                       class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0051:  ldloc.s    V_4
-    IL_0053:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0058:  pop
-    IL_0059:  ldloc.2
-    IL_005a:  ldc.i4.1
-    IL_005b:  add
-    IL_005c:  stloc.2
-    IL_005d:  ldloc.2
-    IL_005e:  ldloc.1
-    IL_005f:  ldc.i4.1
-    IL_0060:  add
-    IL_0061:  bne.un.s   IL_001f
-
-    IL_0063:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.debug.bsl
deleted file mode 100644
index c56fef87382..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachOnString01.fs.il.netcore.debug.bsl
+++ /dev/null
@@ -1,556 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:1:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed assembly
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .class auto ansi serializable sealed nested assembly beforefieldinit test8@54
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test8@54 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test8@54::.ctor()
-      IL_0005:  stsfld     class assembly/test8@54 assembly/test8@54::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .class auto ansi serializable sealed nested assembly beforefieldinit test9@63
-         extends class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>
-  {
-    .field static assembly initonly class assembly/test9@63 @_instance
-    .method assembly specialname rtspecialname 
-            instance void  .ctor() cil managed
-    {
-      .custom instance void [runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
-      .custom instance void [runtime]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
-      
-      .maxstack  8
-      IL_0000:  ldarg.0
-      IL_0001:  call       instance void class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>::.ctor()
-      IL_0006:  ret
-    } 
-
-    .method public strict virtual instance char 
-            Invoke(char x) cil managed
-    {
-      
-      .maxstack  8
-      IL_0000:  ldarg.1
-      IL_0001:  conv.i4
-      IL_0002:  ldc.i4.1
-      IL_0003:  add
-      IL_0004:  conv.u2
-      IL_0005:  ret
-    } 
-
-    .method private specialname rtspecialname static 
-            void  .cctor() cil managed
-    {
-      
-      .maxstack  10
-      IL_0000:  newobj     instance void assembly/test9@63::.ctor()
-      IL_0005:  stsfld     class assembly/test9@63 assembly/test9@63::@_instance
-      IL_000a:  ret
-    } 
-
-  } 
-
-  .method public static void  test1(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test2() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldstr      "123"
-    IL_0009:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000e:  ldc.i4.1
-    IL_000f:  sub
-    IL_0010:  stloc.1
-    IL_0011:  ldloc.1
-    IL_0012:  ldloc.2
-    IL_0013:  blt.s      IL_0030
-
-    IL_0015:  ldstr      "123"
-    IL_001a:  ldloc.2
-    IL_001b:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0020:  stloc.3
-    IL_0021:  ldloc.0
-    IL_0022:  ldloc.3
-    IL_0023:  conv.i4
-    IL_0024:  add
-    IL_0025:  stloc.0
-    IL_0026:  ldloc.2
-    IL_0027:  ldc.i4.1
-    IL_0028:  add
-    IL_0029:  stloc.2
-    IL_002a:  ldloc.2
-    IL_002b:  ldloc.1
-    IL_002c:  ldc.i4.1
-    IL_002d:  add
-    IL_002e:  bne.un.s   IL_0015
-
-    IL_0030:  ret
-  } 
-
-  .method public static void  test3() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test4() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  nop
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test5() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             char V_2)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.1
-    IL_0003:  ldstr      "123"
-    IL_0008:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000d:  ldc.i4.1
-    IL_000e:  sub
-    IL_000f:  stloc.0
-    IL_0010:  ldloc.0
-    IL_0011:  ldloc.1
-    IL_0012:  blt.s      IL_0040
-
-    IL_0014:  ldstr      "123"
-    IL_0019:  ldloc.1
-    IL_001a:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_001f:  stloc.2
-    IL_0020:  ldstr      "%A"
-    IL_0025:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_002a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_002f:  ldloc.2
-    IL_0030:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_0035:  pop
-    IL_0036:  ldloc.1
-    IL_0037:  ldc.i4.1
-    IL_0038:  add
-    IL_0039:  stloc.1
-    IL_003a:  ldloc.1
-    IL_003b:  ldloc.0
-    IL_003c:  ldc.i4.1
-    IL_003d:  add
-    IL_003e:  bne.un.s   IL_0014
-
-    IL_0040:  ret
-  } 
-
-  .method public static void  test6(string str) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldc.i4.0
-    IL_0001:  stloc.0
-    IL_0002:  ldc.i4.0
-    IL_0003:  stloc.2
-    IL_0004:  ldarg.0
-    IL_0005:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000a:  ldc.i4.1
-    IL_000b:  sub
-    IL_000c:  stloc.1
-    IL_000d:  ldloc.1
-    IL_000e:  ldloc.2
-    IL_000f:  blt.s      IL_0028
-
-    IL_0011:  ldarg.0
-    IL_0012:  ldloc.2
-    IL_0013:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0018:  stloc.3
-    IL_0019:  ldloc.0
-    IL_001a:  ldloc.3
-    IL_001b:  conv.i4
-    IL_001c:  add
-    IL_001d:  stloc.0
-    IL_001e:  ldloc.2
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  stloc.2
-    IL_0022:  ldloc.2
-    IL_0023:  ldloc.1
-    IL_0024:  ldc.i4.1
-    IL_0025:  add
-    IL_0026:  bne.un.s   IL_0011
-
-    IL_0028:  ret
-  } 
-
-  .method public static void  test7() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldc.i4.0
-    IL_0004:  stloc.2
-    IL_0005:  ldstr      "123"
-    IL_000a:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_000f:  ldc.i4.1
-    IL_0010:  sub
-    IL_0011:  stloc.1
-    IL_0012:  ldloc.1
-    IL_0013:  ldloc.2
-    IL_0014:  blt.s      IL_0031
-
-    IL_0016:  ldstr      "123"
-    IL_001b:  ldloc.2
-    IL_001c:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0021:  stloc.3
-    IL_0022:  ldloc.0
-    IL_0023:  ldloc.3
-    IL_0024:  conv.i4
-    IL_0025:  add
-    IL_0026:  stloc.0
-    IL_0027:  ldloc.2
-    IL_0028:  ldc.i4.1
-    IL_0029:  add
-    IL_002a:  stloc.2
-    IL_002b:  ldloc.2
-    IL_002c:  ldloc.1
-    IL_002d:  ldc.i4.1
-    IL_002e:  add
-    IL_002f:  bne.un.s   IL_0016
-
-    IL_0031:  ret
-  } 
-
-  .method public static void  test8() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3)
-    IL_0000:  ldsfld     class assembly/test8@54 assembly/test8@54::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_0047
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "%O"
-    IL_002c:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,char>::.ctor(string)
-    IL_0031:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0036:  ldloc.3
-    IL_0037:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_003c:  pop
-    IL_003d:  ldloc.2
-    IL_003e:  ldc.i4.1
-    IL_003f:  add
-    IL_0040:  stloc.2
-    IL_0041:  ldloc.2
-    IL_0042:  ldloc.1
-    IL_0043:  ldc.i4.1
-    IL_0044:  add
-    IL_0045:  bne.un.s   IL_001f
-
-    IL_0047:  ret
-  } 
-
-  .method public static void  test9() cil managed
-  {
-    
-    .maxstack  5
-    .locals init (string V_0,
-             int32 V_1,
-             int32 V_2,
-             char V_3,
-             string V_4)
-    IL_0000:  ldsfld     class assembly/test9@63 assembly/test9@63::@_instance
-    IL_0005:  ldstr      "1234"
-    IL_000a:  call       string [FSharp.Core]Microsoft.FSharp.Core.StringModule::Map(class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<char,char>,
-                                                                                     string)
-    IL_000f:  stloc.0
-    IL_0010:  ldc.i4.0
-    IL_0011:  stloc.2
-    IL_0012:  ldloc.0
-    IL_0013:  callvirt   instance int32 [runtime]System.String::get_Length()
-    IL_0018:  ldc.i4.1
-    IL_0019:  sub
-    IL_001a:  stloc.1
-    IL_001b:  ldloc.1
-    IL_001c:  ldloc.2
-    IL_001d:  blt.s      IL_005a
-
-    IL_001f:  ldloc.0
-    IL_0020:  ldloc.2
-    IL_0021:  callvirt   instance char [netstandard]System.String::get_Chars(int32)
-    IL_0026:  stloc.3
-    IL_0027:  ldstr      "{0} foo"
-    IL_002c:  ldloc.3
-    IL_002d:  box        [runtime]System.Char
-    IL_0032:  call       string [runtime]System.String::Format(string,
-                                                                      object)
-    IL_0037:  stloc.s    V_4
-    IL_0039:  ldstr      "%O"
-    IL_003e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,string>::.ctor(string)
-    IL_0043:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0048:  ldloc.s    V_4
-    IL_004a:  callvirt   instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<string,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::Invoke(!0)
-    IL_004f:  pop
-    IL_0050:  ldloc.2
-    IL_0051:  ldc.i4.1
-    IL_0052:  add
-    IL_0053:  stloc.2
-    IL_0054:  ldloc.2
-    IL_0055:  ldloc.1
-    IL_0056:  ldc.i4.1
-    IL_0057:  add
-    IL_0058:  bne.un.s   IL_001f
-
-    IL_005a:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$assembly
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepByte.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepByte.fs
deleted file mode 100644
index f4e047fb3d5..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepByte.fs
+++ /dev/null
@@ -1,57 +0,0 @@
-let mutable c = 0uy
-
-let f0 () =
-    for n in 10uy..1uy do
-        c <- n
-
-let f00 () =
-    for n in 10uy..1uy..1uy do
-        c <- n
-
-let f1 () =
-    for n in 1uy..10uy do
-        c <- n
-
-let f2 start =
-    for n in start..10uy do
-        c <- n
-
-let f3 finish =
-    for n in 1uy..finish do
-        c <- n
-
-let f4 (start: byte) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1uy..1uy..10uy do
-        c <- n
-
-let f6 () =
-    for n in 1uy..2uy..10uy do
-        c <- n
-
-let f7uy start =
-    for n in start..2uy..10uy do
-        c <- n
-
-let f8 step =
-    for n in 1uy..step..10uy do
-        c <- n
-
-let f9 finish =
-    for n in 1uy..2uy..finish do
-        c <- n
-
-let f10 (start: byte) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0uy..finish do
-        c <- n
-
-let f12 () =
-    for n in 1uy..0uy..10uy do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepChar.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepChar.fs
deleted file mode 100644
index 137044d13b9..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepChar.fs
+++ /dev/null
@@ -1,57 +0,0 @@
-let mutable c = '\000'
-
-let f0 () =
-    for n in 'z'..'a' do
-        c <- n
-
-let f00 () =
-    for n in 'z'..'\001'..'a' do
-        c <- n
-
-let f1 () =
-    for n in 'a'..'z' do
-        c <- n
-
-let f2 start =
-    for n in start..'z' do
-        c <- n
-
-let f3 finish =
-    for n in 'a'..finish do
-        c <- n
-
-let f4 (start: char) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 'a'..'\001'..'z' do
-        c <- n
-
-let f6 () =
-    for n in 'a'..'\002'..'z' do
-        c <- n
-
-let f7 start =
-    for n in start..'\002'..'z' do
-        c <- n
-
-let f8 step =
-    for n in 'a'..step..'z' do
-        c <- n
-
-let f9 finish =
-    for n in 'a'..'\002'..finish do
-        c <- n
-
-let f10 (start: char) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..'\000'..finish do
-        c <- n
-
-let f12 () =
-    for n in 'a'..'\000'..'z' do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt16.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt16.fs
deleted file mode 100644
index f664f0ad2de..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt16.fs
+++ /dev/null
@@ -1,65 +0,0 @@
-let mutable c = 0s
-
-let f0 () =
-    for n in 10s..1s do
-        c <- n
-
-let f00 () =
-    for n in 10s..1s..1s do
-        c <- n
-
-let f1 () =
-    for n in 1s..10s do
-        c <- n
-
-let f2 start =
-    for n in start..10s do
-        c <- n
-
-let f3 finish =
-    for n in 1s..finish do
-        c <- n
-
-let f4 (start: int16) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1s..1s..10s do
-        c <- n
-
-let f6 () =
-    for n in 1s..2s..10s do
-        c <- n
-
-let f7 start =
-    for n in start..2s..10s do
-        c <- n
-
-let f8 step =
-    for n in 1s..step..10s do
-        c <- n
-
-let f9 finish =
-    for n in 1s..2s..finish do
-        c <- n
-
-let f10 (start: int16) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0s..finish do
-        c <- n
-
-let f12 () =
-    for n in 1s..0s..10s do
-        c <- n
-
-let f13 () =
-    for n in 10s .. -1s .. 1s do
-        c <- n
-
-let f14 () =
-    for n in 10s .. -2s .. 1s do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt32.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt32.fs
deleted file mode 100644
index 32bca951da3..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt32.fs
+++ /dev/null
@@ -1,65 +0,0 @@
-let mutable c = 0
-
-let f0 () =
-    for n in 10..1 do
-        c <- n
-
-let f00 () =
-    for n in 10..1..1 do
-        c <- n
-
-let f1 () =
-    for n in 1..10 do
-        c <- n
-
-let f2 start =
-    for n in start..10 do
-        c <- n
-
-let f3 finish =
-    for n in 1..finish do
-        c <- n
-
-let f4 start finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1..1..10 do
-        c <- n
-
-let f6 () =
-    for n in 1..2..10 do
-        c <- n
-
-let f7 start =
-    for n in start..2..10 do
-        c <- n
-
-let f8 step =
-    for n in 1..step..10 do
-        c <- n
-
-let f9 finish =
-    for n in 1..2..finish do
-        c <- n
-
-let f10 start step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0..finish do
-        c <- n
-
-let f12 () =
-    for n in 1..0..10 do
-        c <- n
-
-let f13 () =
-    for n in 10..-1..1 do
-        c <- n
-
-let f14 () =
-    for n in 10..-2..1 do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt64.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt64.fs
deleted file mode 100644
index 9e272eb300a..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepInt64.fs
+++ /dev/null
@@ -1,65 +0,0 @@
-let mutable c = 0L
-
-let f0 () =
-    for n in 10L..1L do
-        c <- n
-
-let f00 () =
-    for n in 10L..1L..1L do
-        c <- n
-
-let f1 () =
-    for n in 1L..10L do
-        c <- n
-
-let f2 start =
-    for n in start..10L do
-        c <- n
-
-let f3 finish =
-    for n in 1L..finish do
-        c <- n
-
-let f4 (start: int64) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1L..1L..10L do
-        c <- n
-
-let f6 () =
-    for n in 1L..2L..10L do
-        c <- n
-
-let f7 start =
-    for n in start..2L..10L do
-        c <- n
-
-let f8 step =
-    for n in 1L..step..10L do
-         c <- n
-
-let f9 finish =
-    for n in 1L..2L..finish do
-         c <- n
-
-let f10 (start: int64) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0L..finish do
-        c <- n
-
-let f12 () =
-    for n in 1L..0L..10L do
-        c <- n
-
-let f13 () =
-    for n in 10L.. -1L ..1L do
-        c <- n
-
-let f14 () =
-    for n in 10L.. -2L ..1L do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepIntPtr.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepIntPtr.fs
deleted file mode 100644
index 31464a36932..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepIntPtr.fs
+++ /dev/null
@@ -1,65 +0,0 @@
-let mutable c = 0n
-
-let f0 () =
-    for n in 10n..1n do
-        c <- n
-
-let f00 () =
-    for n in 10n..1n..1n do
-        c <- n
-
-let f1 () =
-    for n in 1n..10n do
-        c <- n
-
-let f2 start =
-    for n in start..10n do
-        c <- n
-
-let f3 finish =
-    for n in 1n..finish do
-        c <- n
-
-let f4 (start: nativeint) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1n..1n..10n do
-        c <- n
-
-let f6 () =
-    for n in 1n..2n..10n do
-        c <- n
-
-let f7 start =
-    for n in start..2n..10n do
-        c <- n
-
-let f8 step =
-    for n in 1n..step..10n do
-         c <- n
-
-let f9 finish =
-    for n in 1n..2n..finish do
-         c <- n
-
-let f10 (start: nativeint) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0n..finish do
-        c <- n
-
-let f12 () =
-    for n in 1n..0n..10n do
-        c <- n
-
-let f13 () =
-    for n in 10n.. -1n ..1n do
-        c <- n
-
-let f14 () =
-    for n in 10n.. -2n ..1n do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepSByte.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepSByte.fs
deleted file mode 100644
index ee96ee45237..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepSByte.fs
+++ /dev/null
@@ -1,65 +0,0 @@
-let mutable c = 0y
-
-let f0 () =
-    for n in 10y..1y do
-        c <- n
-
-let f00 () =
-    for n in 10y..1y..1y do
-        c <- n
-
-let f1 () =
-    for n in 1y..10y do
-        c <- n
-
-let f2 start =
-    for n in start..10y do
-        c <- n
-
-let f3 finish =
-    for n in 1y..finish do
-        c <- n
-
-let f4 (start: sbyte) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1y..1y..10y do
-        c <- n
-
-let f6 () =
-    for n in 1y..2y..10y do
-        c <- n
-
-let f7 start =
-    for n in start..2y..10y do
-        c <- n
-
-let f8 step =
-    for n in 1y..step..10y do
-        c <- n
-
-let f9 finish =
-    for n in 1y..2y..finish do
-        c <- n
-
-let f10 (start: sbyte) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0y..finish do
-        c <- n
-
-let f12 () =
-    for n in 1y..0y..10y do
-        c <- n
-
-let f13 () =
-    for n in 10y .. -1y .. 1y do
-        c <- n
-
-let f14 () =
-    for n in 10y .. -2y .. 1y do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt16.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt16.fs
deleted file mode 100644
index 64028b65394..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt16.fs
+++ /dev/null
@@ -1,57 +0,0 @@
-let mutable c = 0us
-
-let f0 () =
-    for n in 10us..1us do
-        c <- n
-
-let f00 () =
-    for n in 10us..1us..1us do
-        c <- n
-
-let f1 () =
-    for n in 1us..10us do
-        c <- n
-
-let f2 start =
-    for n in start..10us do
-        c <- n
-
-let f3 finish =
-    for n in 1us..finish do
-        c <- n
-
-let f4 (start: uint16) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1us..1us..10us do
-        c <- n
-
-let f6 () =
-    for n in 1us..2us..10us do
-        c <- n
-
-let f7 start =
-    for n in start..2us..10us do
-        c <- n
-
-let f8 step =
-    for n in 1us..step..10us do
-        c <- n
-
-let f9 finish =
-    for n in 1us..2us..finish do
-        c <- n
-
-let f10 (start: uint16) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0us..finish do
-        c <- n
-
-let f12 () =
-    for n in 1us..0us..10us do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt32.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt32.fs
deleted file mode 100644
index d689d8d393a..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt32.fs
+++ /dev/null
@@ -1,57 +0,0 @@
-let mutable c = 0u
-
-let f0 () =
-    for n in 10u..1u do
-        c <- n
-
-let f00 () =
-    for n in 10u..1u..1u do
-        c <- n
-
-let f1 () =
-    for n in 1u..10u do
-        c <- n
-
-let f2 start =
-    for n in start..10u do
-        c <- n
-
-let f3 finish =
-    for n in 1u..finish do
-        c <- n
-
-let f4 (start: uint32) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1u..1u..10u do
-        c <- n
-
-let f6 () =
-    for n in 1u..2u..10u do
-        c <- n
-
-let f7 start =
-    for n in start..2u..10u do
-        c <- n
-
-let f8 step =
-    for n in 1u..step..10u do
-        c <- n
-
-let f9 finish =
-    for n in 1u..2u..finish do
-        c <- n
-
-let f10 (start: uint32) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0u..finish do
-        c <- n
-
-let f12 () =
-    for n in 1u..0u..10u do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt64.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt64.fs
deleted file mode 100644
index 2a9b1627344..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUInt64.fs
+++ /dev/null
@@ -1,57 +0,0 @@
-let mutable c = 0UL
-
-let f0 () =
-    for n in 10UL..1UL do
-        c <- n
-
-let f00 () =
-    for n in 10UL..1UL..1UL do
-        c <- n
-
-let f1 () =
-    for n in 1UL..10UL do
-        c <- n
-
-let f2 start =
-    for n in start..10UL do
-        c <- n
-
-let f3 finish =
-    for n in 1UL..finish do
-        c <- n
-
-let f4 (start: uint64) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1UL..1UL..10UL do
-        c <- n
-
-let f6 () =
-    for n in 1UL..2UL..10UL do
-        c <- n
-
-let f7 start =
-    for n in start..2UL..10UL do
-        c <- n
-
-let f8 step =
-    for n in 1UL..step..10UL do
-        c <- n
-
-let f9 finish =
-    for n in 1UL..2UL..finish do
-        c <- n
-
-let f10 (start: uint64) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0UL..finish do
-        c <- n
-
-let f12 () =
-    for n in 1UL..0UL..10UL do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs
deleted file mode 100644
index 0ec7970c52a..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStepUIntPtr.fs
+++ /dev/null
@@ -1,57 +0,0 @@
-let mutable c = 0un
-
-let f0 () =
-    for n in 10un..1un do
-        c <- n
-
-let f00 () =
-    for n in 10un..1un..1un do
-        c <- n
-
-let f1 () =
-    for n in 1un..10un do
-        c <- n
-
-let f2 start =
-    for n in start..10un do
-        c <- n
-
-let f3 finish =
-    for n in 1un..finish do
-        c <- n
-
-let f4 (start: unativeint) finish =
-    for n in start..finish do
-        c <- n
-
-let f5 () =
-    for n in 1un..1un..10un do
-        c <- n
-
-let f6 () =
-    for n in 1un..2un..10un do
-        c <- n
-
-let f7 start =
-    for n in start..2un..10un do
-        c <- n
-
-let f8 step =
-    for n in 1un..step..10un do
-        c <- n
-
-let f9 finish =
-    for n in 1un..2un..finish do
-        c <- n
-
-let f10 (start: unativeint) step finish =
-    for n in finish..step..finish do
-        c <- n
-
-let f11 start finish =
-    for n in start..0un..finish do
-        c <- n
-
-let f12 () =
-    for n in 1un..0un..10un do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs
deleted file mode 100644
index a142d0f5e00..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForEachRangeStep_UnitsOfMeasure.fs
+++ /dev/null
@@ -1,47 +0,0 @@
-open FSharp.Data.UnitSystems.SI.UnitSymbols
-
-let mutable c = 0L<m>
-
-let f1 () =
-    for n in 10L<m>..1L<m>..1L<m> do
-        c <- n
-
-let f2 () =
-    for n in 1L<m>..1L<m>..10L<m> do
-        c <- n
-
-let f3 () =
-    for n in 1L<m>..2L<m>..10L<m> do
-        c <- n
-
-let f4 start =
-    for n in start..2L<m>..10L<m> do
-        c <- n
-
-let f5 step =
-    for n in 1L<m>..step..10L<m> do
-        c <- n
-
-let f6 finish =
-    for n in 1L<m>..2L<m>..finish do
-        c <- n
-
-let f7 start step finish =
-    for n in start..step..finish do
-        c <- n
-
-let f8 start finish =
-    for n in start..0L<m>..finish do
-        c <- n
-
-let f9 () =
-    for n in 1L<m>..0L<m>..10L<m> do
-        c <- n
-
-let f10 () =
-    for n in 10L<m> .. -1L<m>..1L<m> do
-        c <- n
-
-let f11 () =
-    for n in 10L<m> .. -2L<m>..1L<m> do
-        c <- n
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForLoop.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForLoop.fs
deleted file mode 100644
index 57fa5bd39ac..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ForLoop.fs
+++ /dev/null
@@ -1,220 +0,0 @@
-namespace EmittedIL.RealInternalSignature
-
-open Xunit
-open FSharp.Test
-open FSharp.Test.Compiler
-
-module ForLoopRealInternalSignatureOn =
-
-    let verifyCompilation compilation =
-        compilation
-        |> withOptions [ "--test:EmitFeeFeeAs100001" ]
-        |> asExe
-        |> withOptimize
-        |> withEmbeddedPdb
-        |> withEmbedAllSource
-        |> ignoreWarnings
-        |> withRealInternalSignatureOn
-        |> verifyILBaseline
-
-    // SOURCE=NoAllocationOfTuple01.fs SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoAllocationOfTuple01.dll" # NoAllocationOfTuple01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoAllocationOfTuple01.fs"|])>]
-    let ``NoAllocationOfTuple01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachOnArray01.fs      SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnArray01.dll"      # ForEachOnArray01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ForEachOnArray01.fs"|])>]
-    let ``ForEachOnArray01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachOnList01.fs       SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnList01.dll"       # ForEachOnList01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ForEachOnList01.fs"|])>]
-    let ``ForEachOnList01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachOnString01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ForEachOnString01.dll"     # ForEachOnString01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ForEachOnString01.fs"|])>]
-    let ``ForEachOnString01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ZeroToArrLength01.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength01.dll"     # ZeroToArrLength01.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ZeroToArrLength01.fs"|])>]
-    let ``ZeroToArrLength01_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ZeroToArrLength02.fs     SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd ZeroToArrLength02.dll"     # ZeroToArrLength02.fs
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"ZeroToArrLength02.fs"|])>]
-    let ``ZeroToArrLength02_fs`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NoIEnumerable01.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable01.dll"            # NoIEnumerable01.fsx
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoIEnumerable01.fsx"|])>]
-    let ``NoIEnumerable01_fsx`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NoIEnumerable02.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable02.dll"            # NoIEnumerable02.fsx
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoIEnumerable02.fsx"|])>]
-    let ``NoIEnumerable02_fsx`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NoIEnumerable03.fsx SCFLAGS="-a -g --optimize+" COMPILE_ONLY=1 POSTCMD="..\\CompareIL.cmd NoIEnumerable03.dll"            # NoIEnumerable03.fsx
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NoIEnumerable03.fsx"|])>]
-    let ``NoIEnumerable03_fsx`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd01.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd01_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd01.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd01.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd01.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd01_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd02.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd02_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd02.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd02.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd02.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd02_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd03.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd03_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd03.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd03.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd03.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd03_fs_nonopt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd04.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd04_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd04.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd04.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd04.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd04_fs_nonopt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize+"	# NonTrivialBranchingBindingInEnd05.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd05_fs_opt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=NonTrivialBranchingBindingInEnd05.fs SCFLAGS="--optimize-"	# NonTrivialBranchingBindingInEnd05.fs --optimize-
-    [<Theory; Directory(__SOURCE_DIRECTORY__, Includes=[|"NonTrivialBranchingBindingInEnd05.fs"|])>]
-    let ``NonTrivialBranchingBindingInEnd05_fs_nonopt`` compilation =
-        compilation
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepSByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepSByte.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepSByte.fs"|])>]
-    let ``ForEachRangeStepSByte_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepByte.fs SCFLAGS="--optimize+"	# ForEachRangeStepByte.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepByte.fs"|])>]
-    let ``ForEachRangeStepByte_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepChar.fs SCFLAGS="--optimize+"	# ForEachRangeStepChar.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepChar.fs"|])>]
-    let ``ForEachRangeStepChar_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt16.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepInt16.fs"|])>]
-    let ``ForEachRangeStepInt16_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUInt16.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt16.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUInt16.fs"|])>]
-    let ``ForEachRangeStepUInt16_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt32.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepInt32.fs"|])>]
-    let ``ForEachRangeStepInt32_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUInt32.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt32.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUInt32.fs"|])>]
-    let ``ForEachRangeStepUInt32_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepInt64.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepInt64.fs"|])>]
-    let ``ForEachRangeStepInt64_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUInt64.fs SCFLAGS="--optimize+"	# ForEachRangeStepUInt64.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUInt64.fs"|])>]
-    let ``ForEachRangeStepUInt64_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepIntPtr.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepIntPtr.fs"|])>]
-    let ``ForEachRangeStepIntPtr_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStepUIntPtr.fs SCFLAGS="--optimize+"	# ForEachRangeStepUIntPtr.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStepUIntPtr.fs"|])>]
-    let ``ForEachRangeStepUIntPtr_fs_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
-
-    // SOURCE=ForEachRangeStep_UnitsOfMeasure.fs SCFLAGS="--optimize+"	# ForEachRangeStep_UnitsOfMeasure.fs --optimize+
-    [<Theory; Directory(__SOURCE_DIRECTORY__, BaselineSuffix=".opt", Includes=[|"ForEachRangeStep_UnitsOfMeasure.fs"|])>]
-    let ``ForEachRangeStep_UnitsOfMeasure_opt`` compilation =
-        compilation
-        |> withLangVersionPreview // TODO https://github.com/dotnet/fsharp/issues/16739: Remove this when LanguageFeature.LowerIntegralRangesToFastLoops is out of preview.
-        |> verifyCompilation
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoAllocationOfTuple01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoAllocationOfTuple01.fs
deleted file mode 100644
index 54c5dd3c27c..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoAllocationOfTuple01.fs
+++ /dev/null
@@ -1,11 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-// Regression test for FSHARP1.0:5408
-// For-loop emitted with unnecessary tuple
-module NoAllocationOfTuple01
-let loop n =
-    let a = Array.zeroCreate n 
-    let mutable i = -1
-    for j = 1 to n do
-      i <- i + 1 
-      a.[ i ] <- j // creates an unnecessary temporary tuple
-    a
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx
deleted file mode 100644
index 6c6ab9e6c2f..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx
+++ /dev/null
@@ -1,8 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-// Regression test for FSHARP1.0:6064
-
-module M
-
-let loop1 N =
-   for i in 1 .. N do
-      printfn "aaa"
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.debug.bsl
deleted file mode 100644
index 4c0acb5b6ba..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop1(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.1
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.release.bsl
deleted file mode 100644
index 1c1f3221262..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.net472.release.bsl
+++ /dev/null
@@ -1,106 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop1(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_2)
-    IL_0000:  ldc.i4.1
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0029
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  stloc.2
-    IL_0013:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0018:  ldloc.2
-    IL_0019:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                         class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_001e:  pop
-    IL_001f:  ldloc.1
-    IL_0020:  ldc.i4.1
-    IL_0021:  add
-    IL_0022:  stloc.1
-    IL_0023:  ldloc.1
-    IL_0024:  ldloc.0
-    IL_0025:  ldc.i4.1
-    IL_0026:  add
-    IL_0027:  bne.un.s   IL_0008
-
-    IL_0029:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.debug.bsl
deleted file mode 100644
index 4c0acb5b6ba..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable01.fsx.il.netcore.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop1(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.1
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.0
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx
deleted file mode 100644
index 14fa58c1458..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx
+++ /dev/null
@@ -1,8 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-// Regression test for FSHARP1.0:6064
-
-module M
-
-let loop2 N =
-   for i in 100 .. N do
-      printfn "aaa"
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.debug.bsl
deleted file mode 100644
index e31d59290d9..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop2(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.s   100
-    IL_0002:  stloc.1
-    IL_0003:  ldarg.0
-    IL_0004:  stloc.0
-    IL_0005:  ldloc.0
-    IL_0006:  ldloc.1
-    IL_0007:  blt.s      IL_0023
-
-    IL_0009:  ldstr      "aaa"
-    IL_000e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0013:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0018:  pop
-    IL_0019:  ldloc.1
-    IL_001a:  ldc.i4.1
-    IL_001b:  add
-    IL_001c:  stloc.1
-    IL_001d:  ldloc.1
-    IL_001e:  ldloc.0
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  bne.un.s   IL_0009
-
-    IL_0023:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.release.bsl
deleted file mode 100644
index 5db215b7499..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.net472.release.bsl
+++ /dev/null
@@ -1,106 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop2(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_2)
-    IL_0000:  ldc.i4.s   100
-    IL_0002:  stloc.1
-    IL_0003:  ldarg.0
-    IL_0004:  stloc.0
-    IL_0005:  ldloc.0
-    IL_0006:  ldloc.1
-    IL_0007:  blt.s      IL_002a
-
-    IL_0009:  ldstr      "aaa"
-    IL_000e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0013:  stloc.2
-    IL_0014:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0019:  ldloc.2
-    IL_001a:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                         class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_001f:  pop
-    IL_0020:  ldloc.1
-    IL_0021:  ldc.i4.1
-    IL_0022:  add
-    IL_0023:  stloc.1
-    IL_0024:  ldloc.1
-    IL_0025:  ldloc.0
-    IL_0026:  ldc.i4.1
-    IL_0027:  add
-    IL_0028:  bne.un.s   IL_0009
-
-    IL_002a:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.debug.bsl
deleted file mode 100644
index e31d59290d9..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable02.fsx.il.netcore.debug.bsl
+++ /dev/null
@@ -1,96 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop2(int32 N) cil managed
-  {
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldc.i4.s   100
-    IL_0002:  stloc.1
-    IL_0003:  ldarg.0
-    IL_0004:  stloc.0
-    IL_0005:  ldloc.0
-    IL_0006:  ldloc.1
-    IL_0007:  blt.s      IL_0023
-
-    IL_0009:  ldstr      "aaa"
-    IL_000e:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0013:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0018:  pop
-    IL_0019:  ldloc.1
-    IL_001a:  ldc.i4.1
-    IL_001b:  add
-    IL_001c:  stloc.1
-    IL_001d:  ldloc.1
-    IL_001e:  ldloc.0
-    IL_001f:  ldc.i4.1
-    IL_0020:  add
-    IL_0021:  bne.un.s   IL_0009
-
-    IL_0023:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx
deleted file mode 100644
index a445b6fd3dd..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx
+++ /dev/null
@@ -1,9 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-// Regression test for FSHARP1.0:6064
-
-module M
-
-let loop3 a N = 
-   for i in a .. N do
-      printfn "aaa"
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.debug.bsl
deleted file mode 100644
index c580ba49eec..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.debug.bsl
+++ /dev/null
@@ -1,98 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop3(int32 a,
-                                    int32 N) cil managed
-  {
-    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationArgumentCountsAttribute::.ctor(int32[]) = ( 01 00 02 00 00 00 01 00 00 00 01 00 00 00 00 00 ) 
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldarg.0
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.1
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.release.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.release.bsl
deleted file mode 100644
index 30f24778b50..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.net472.release.bsl
+++ /dev/null
@@ -1,108 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly extern netstandard
-{
-  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         
-  .ver 2:0:0:0
-}
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop3(int32 a,
-                                    int32 N) cil managed
-  {
-    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationArgumentCountsAttribute::.ctor(int32[]) = ( 01 00 02 00 00 00 01 00 00 00 01 00 00 00 00 00 ) 
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1,
-             class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit> V_2)
-    IL_0000:  ldarg.0
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.1
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0029
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  stloc.2
-    IL_0013:  call       class [netstandard]System.IO.TextWriter [netstandard]System.Console::get_Out()
-    IL_0018:  ldloc.2
-    IL_0019:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.PrintfModule::PrintFormatLineToTextWriter<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [runtime]System.IO.TextWriter,
-                                                                                                                                                         class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_001e:  pop
-    IL_001f:  ldloc.1
-    IL_0020:  ldc.i4.1
-    IL_0021:  add
-    IL_0022:  stloc.1
-    IL_0023:  ldloc.1
-    IL_0024:  ldloc.0
-    IL_0025:  ldc.i4.1
-    IL_0026:  add
-    IL_0027:  bne.un.s   IL_0008
-
-    IL_0029:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.debug.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.debug.bsl
deleted file mode 100644
index c580ba49eec..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NoIEnumerable03.fsx.il.netcore.debug.bsl
+++ /dev/null
@@ -1,98 +0,0 @@
-
-
-
-
-
-.assembly extern runtime { }
-.assembly extern FSharp.Core { }
-.assembly assembly
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
-                                                                                                      int32,
-                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
-
-  
-  
-
-  .hash algorithm 0x00008004
-  .ver 0:0:0:0
-}
-.mresource public FSharpSignatureData.assembly
-{
-  
-  
-}
-.mresource public FSharpOptimizationData.assembly
-{
-  
-  
-}
-.module assembly.exe
-
-.imagebase {value}
-.file alignment 0x00000200
-.stackreserve 0x00100000
-.subsystem 0x0003       
-.corflags 0x00000001    
-
-
-
-
-
-.class public abstract auto ansi sealed M
-       extends [runtime]System.Object
-{
-  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
-  .method public static void  loop3(int32 a,
-                                    int32 N) cil managed
-  {
-    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationArgumentCountsAttribute::.ctor(int32[]) = ( 01 00 02 00 00 00 01 00 00 00 01 00 00 00 00 00 ) 
-    
-    .maxstack  5
-    .locals init (int32 V_0,
-             int32 V_1)
-    IL_0000:  ldarg.0
-    IL_0001:  stloc.1
-    IL_0002:  ldarg.1
-    IL_0003:  stloc.0
-    IL_0004:  ldloc.0
-    IL_0005:  ldloc.1
-    IL_0006:  blt.s      IL_0022
-
-    IL_0008:  ldstr      "aaa"
-    IL_000d:  newobj     instance void class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`5<class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>::.ctor(string)
-    IL_0012:  call       !!0 [FSharp.Core]Microsoft.FSharp.Core.ExtraTopLevelOperators::PrintFormatLine<class [FSharp.Core]Microsoft.FSharp.Core.Unit>(class [FSharp.Core]Microsoft.FSharp.Core.PrintfFormat`4<!!0,class [runtime]System.IO.TextWriter,class [FSharp.Core]Microsoft.FSharp.Core.Unit,class [FSharp.Core]Microsoft.FSharp.Core.Unit>)
-    IL_0017:  pop
-    IL_0018:  ldloc.1
-    IL_0019:  ldc.i4.1
-    IL_001a:  add
-    IL_001b:  stloc.1
-    IL_001c:  ldloc.1
-    IL_001d:  ldloc.0
-    IL_001e:  ldc.i4.1
-    IL_001f:  add
-    IL_0020:  bne.un.s   IL_0008
-
-    IL_0022:  ret
-  } 
-
-} 
-
-.class private abstract auto ansi sealed '<StartupCode$assembly>'.$M$fsx
-       extends [runtime]System.Object
-{
-  .method public static void  main@() cil managed
-  {
-    .entrypoint
-    
-    .maxstack  8
-    IL_0000:  ret
-  } 
-
-} 
-
-
-
-
-
-
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs
deleted file mode 100644
index 9288143b4de..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd01.fs
+++ /dev/null
@@ -1,12 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow 
-// Regression test for FSHARP1.0:5306
-// Bad codegen while optimizing for-loops with non-trivial branching and binding in end
-//<Expects status="success"></Expects>
-
-let r = Array.create 8 1
-let w = Array.create 5 2
-
-for j = 0 to (min r.Length w.Length) - 1 do
-   r.[j] <- r.[j] + w.[j]
-
-(if r.[0] = 3 then 0 else 1) |> exit
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs
deleted file mode 100644
index 9f976b52b52..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd02.fs
+++ /dev/null
@@ -1,12 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow 
-// Regression test for FSHARP1.0:5306
-// Bad codegen while optimizing for-loops with non-trivial branching and binding in end
-//<Expects status="success"></Expects>
-
-let r = Array.create 8 1
-let w = Array.create 5 2
-
-
-for j = (min r.Length w.Length) - 1 downto 0 do
-   r.[j] <- r.[j] + w.[j]
-(if r.[0] = 3 then 0 else 1) |> exit
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs
deleted file mode 100644
index 25e457f4509..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd03.fs
+++ /dev/null
@@ -1,11 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow 
-// Regression test for FSHARP1.0:5306
-// Bad codegen while optimizing for-loops with non-trivial branching and binding in end
-//<Expects status="success"></Expects>
-
-let r = Array.create 8 1
-let w = Array.create 5 2
-
-for j in [0 .. (min r.Length w.Length) - 1] do
-   r.[j] <- r.[j] + w.[j]
-(if r.[0] = 3 then 0 else 1) |> exit
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs
deleted file mode 100644
index 57bf33efac2..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd04.fs
+++ /dev/null
@@ -1,11 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow 
-// Regression test for FSHARP1.0:5306
-// Bad codegen while optimizing for-loops with non-trivial branching and binding in end
-//<Expects status="success"></Expects>
-
-let r = Array.create 8 1
-let w = Array.create 5 2
-
-for j in [(min r.Length w.Length) - 1 .. -1 .. 0] do
-   r.[j] <- r.[j] + w.[j]
-(if r.[0] = 3 then 0 else 1) |> exit
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs
deleted file mode 100644
index 1c3e67958e4..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/NonTrivialBranchingBindingInEnd05.fs
+++ /dev/null
@@ -1,12 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow 
-// Regression test for FSHARP1.0:5306
-// Bad codegen while optimizing for-loops with non-trivial branching and binding in end
-//<Expects status="success"></Expects>
-
-let r = Array.create 8 1
-let w = Array.create 5 2
-
-for k = 0 to (min r.Length w.Length) - 1 do
-    for j = 0 to (min r.Length w.Length) - 1 do
-        r.[j] <- r.[j] + w.[j]
-(if r.[0] = 11 then 0 else 1) |> exit
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength01.fs
deleted file mode 100644
index 68f256b2add..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength01.fs
+++ /dev/null
@@ -1,7 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-//
-// Regression test for FSHARP1.0:4461
-module ZeroToArrLength01
-let f1(arr:int[]) = 
-    for i = 0 to arr.Length - 1 do 
-        arr.[i] <- i
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength02.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength02.fs
deleted file mode 100644
index 96ec6ca9cad..00000000000
--- a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength02.fs
+++ /dev/null
@@ -1,7 +0,0 @@
-// #Regression #CodeGen #Optimizations #ControlFlow #NoMono #ReqNOMT 
-//
-// Regression test for FSHARP1.0:4461
-module ZeroToArrLength02
-let f1(arr:int[]) = 
-    for i = 0 to Array.length arr - 1 do 
-        arr.[i] <- i
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength01.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength01.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength01.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength01.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength01.fs.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength01.fs.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength01.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength01.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength01.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength01.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength02.fs b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength02.fs
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength02.fs
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength02.fs
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength02.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength02.fs.RealInternalSignatureOff.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOff/ZeroToArrLength02.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength02.fs.RealInternalSignatureOff.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength02.fs.il.bsl b/tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength02.fs.RealInternalSignatureOn.il.bsl
similarity index 100%
rename from tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/RealInternalSignatureOn/ZeroToArrLength02.fs.il.bsl
rename to tests/FSharp.Compiler.ComponentTests/EmittedIL/ForLoop/ZeroToArrLength02.fs.RealInternalSignatureOn.il.bsl
diff --git a/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj b/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj
index fec09aa52d9..4f52ba14ae0 100644
--- a/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj
+++ b/tests/FSharp.Compiler.ComponentTests/FSharp.Compiler.ComponentTests.fsproj
@@ -154,8 +154,7 @@
     <Compile Include="EmittedIL\ComputationExpressions\ComputationExpressions.fs" />
     <Compile Include="EmittedIL\ComputedCollections\ComputedCollections.fs" />
     <Compile Include="EmittedIL\DoNotBoxStruct\DoNotBoxStruct.fs" />
-    <Compile Include="EmittedIL\ForLoop\RealInternalSignatureOff\ForLoop.fs" />
-    <Compile Include="EmittedIL\ForLoop\RealInternalSignatureOn\ForLoop.fs" />
+    <Compile Include="EmittedIL\ForLoop\ForLoop.fs" />
     <Compile Include="EmittedIL\GeneratedIterators\GeneratedIterators.fs" />
     <Compile Include="EmittedIL\GenericComparison\CrossAssembly.fs" />
     <Compile Include="EmittedIL\GenericComparison\GenericComparison.fs" />
diff --git a/tests/FSharp.Test.Utilities/ILChecker.fs b/tests/FSharp.Test.Utilities/ILChecker.fs
index 0db96f449ee..3c60114d85e 100644
--- a/tests/FSharp.Test.Utilities/ILChecker.fs
+++ b/tests/FSharp.Test.Utilities/ILChecker.fs
@@ -72,11 +72,15 @@ module ILChecker =
             |> unifyRuntimeAssemblyName
             |> unifyImageBase
 
+        // This lets the same test be used when targeting both netfx and netcore.
+        let unifyNetStandardVersions (text: string) = text.Replace(".ver 2:0:0:0", ".ver 2:1:0:0")
+
         ilCode.Trim()
         |> normalizeNewLines
         |> stripComments
         |> unifyingAssemblyNames
         |> unifyMethodLine
+        |> unifyNetStandardVersions
 
     let private generateIlFile dllFilePath ildasmArgs =
         let ilFilePath = Path.ChangeExtension(dllFilePath, ".il")
@@ -120,9 +124,9 @@ module ILChecker =
         match expectedIL with
         | [] -> errorMsgOpt <- Some "No Expected IL"
         | expectedIL ->
-            expectedIL
-            |> List.map (fun (ilCode: string) -> ilCode.Trim())
-            |> List.iter (fun (ilCode: string) ->
+            let (|Trimmed|) (ilCode: string) = ilCode.Trim()
+
+            for Trimmed ilCode in expectedIL do
                 let expectedLines = ilCode |> normalizeILText (Some assemblyName) |> prepareLines
 
                 if expectedLines.Length = 0 then
@@ -150,7 +154,6 @@ module ILChecker =
                         if errors.Count > 0 then
                             let msg = String.concat "\n" errors + "\n\n\Expected:\n" + ilCode + "\n"
                             errorMsgOpt <- Some(msg + "\n\n\nActual:\n" + String.Join("\n", actualLines, 0, expectedLines.Length))
-            )
 
         match errorMsgOpt with
         | Some msg ->