Update swift:main to support llvm-project:stable/20210726 changes (Rebranch merge) #39473

rdar://82037718

As of "ELF: Create unique SHF_GNU_RETAIN sections for llvm.used global objects" (https://reviews.llvm.org/D97448) LLVM will create separate sections for symbols marked as llvm.used. Use llvm.compiler.used instead. rdar://82681143

IRGen: Use llvm.compiler.used instead of llvm.used on ELF

Later stages use the name to disambiguate variables and this amgiguity can lead to incorrect debug info that crashes LLVM. This also makes the artificial variable names visible in textual SIL output. rdar://82313550

…lyCombiner. Looks like this was a well-intentioned, but counterproductive attempt to introduce new debug info in for partial applies. SILVerifier is now stricter about finding clashing anonymous arguments so this becomes a SIL verifier error rather than a late LLVM crash.

Assign variable names for anonymous function arguments in SILGen.

…in SILBuilder. The size buffer is determined outside of TailAllocatedDebugVariable so of course the substitution must take place outside, too.

…path.

This test is pretty brittle on such a short file. If a member of the timer output is zero, that member is omitted from the output. With how short the file is, various fields come back zero occasionally. On the Linux CI bot, there was a run with no "System Time", while I was seeing it failing locally due to other missing time fields.

…r-timer-test [Rebranch] Disabling driver-time-compilation test

And calling `swift::salvageDebugInfo` in more places. NOTE: The latter change seems to break stdlib build.

This rule tries to prevent two DIVariables -- with different types -- conflicting with each other on the same argument number. If this rule fails, it's highly possible that we forgot to add 'inlinedAt' somewhere.

This has regressed on the rebranch. Add a check for the COFF case.

The ELF autolink section was previously relying on the SHF_EXCLUDE flag being applied through module-level assembly. Remove this gadget and sink the handling down into LLVM. The latest improvements to LLVM now cause this workaround to be insufficient as the section is explicitly marked as SHF_ALLOC, which will implicitly negate the SHF_EXCLUDE. As a result, we no longer discard the metadata. Once this is sunk into LLVM the attribute is unnecessary. Furthermore, due to uniquing, will actually cause a problem as there is no uniform handling for metadata section prefixes. rdar://82640394

test: repair IRGen.objc_protocol_vars on Windows

Conflicts: include/swift/SIL/SILBuilder.h

…ebranch/1 [rebranch] Merge branch 'main' into rebranch

The SingleCommandCompilationDatabase type was removed from LLVM and the API's that took it were changed to just take the vector of arguments instead. This patch updates the calls to `getFullDependencies` to pass in the argument vector to reflect that change and get things building again.

…atabase-api Rebranch: Fix SingleCommandCompilationDatabase references

…he entire type in DebugTypeInfo.

…ble names

IRGen: remove ELF autolink discard gadget

Support additional salvage debug info opportunities

Disable resilience for modules imported by the MemoryBuffer loader.

Wrap assertion code in infndef NDEBUG to fix non-asserts build.

The rebranch is exposing a UaF/stack corruption, disable this for the time being.

tests: disable Concurrency.throwing

(Swift hashes) The last good merge commit was: bc61e6a The first bad merge commit was: 0d6ac8f The commit where it broke was 7e77bc4. This commit only changes a test and shouldn’t have affected the failing test. I'm disabling this test for now since we need to rebranch.

Disabling ClangImporter/overlay.swift

Adapt to API changes in ba664d9, where `AAQueryInfo` now requires the capturing information. Switch to the new `SimpleAAQueryInfo` which maintains the status quo for alias analysis.

LLVMPasses: adapt to ba664d9

/usr/bin/python doesn't exist on ubuntu 20.04 causing tests to fail. I've updated the shebangs everywhere to use `/usr/bin/env python` instead.

Replace /usr/bin/python with /usr/bin/env python

llvm-project commit 1813652 removed the prologue_end, so this test started failing. That directive is now annotated with `is_stmt 0`.

Fix DebugInfo/prologue.swift for

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Update swift:main to support llvm-project:stable/20210726 changes (Rebranch merge) #39473

Update swift:main to support llvm-project:stable/20210726 changes (Rebranch merge) #39473

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