diff --git a/llvm/test/Transforms/GVNSink/indirect-call.ll b/llvm/test/Transforms/GVNSink/indirect-call.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -gvn-sink -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true -simplifycfg-sink-common=false -S | FileCheck %s
+; RUN: opt < %s -gvn-sink -simplifycfg -hoist-common-insts=true -simplifycfg-sink-common=false -S | FileCheck %s
 
 declare i8 @ext(i1)
 

diff --git a/llvm/test/Transforms/GVNSink/sink-common-code.ll b/llvm/test/Transforms/GVNSink/sink-common-code.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -gvn-sink -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true -simplifycfg-sink-common=false -S | FileCheck %s
+; RUN: opt < %s -gvn-sink -simplifycfg -hoist-common-insts=true -simplifycfg-sink-common=false -S | FileCheck %s
 
 define zeroext i1 @test1(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks) {
 entry:

diff --git a/llvm/test/Transforms/SimplifyCFG/2004-12-10-SimplifyCFGCrash.ll b/llvm/test/Transforms/SimplifyCFG/2004-12-10-SimplifyCFGCrash.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output
+; RUN: opt < %s -simplifycfg -disable-output
 
 define void @symhash_add() {
 entry:

diff --git a/llvm/test/Transforms/SimplifyCFG/2005-06-16-PHICrash.ll b/llvm/test/Transforms/SimplifyCFG/2005-06-16-PHICrash.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output
+; RUN: opt < %s -simplifycfg -disable-output
 ; PR584
 @g_38098584 = external global i32		; <i32*> [#uses=1]
 @g_60187400 = external global i32		; <i32*> [#uses=1]

diff --git a/llvm/test/Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll b/llvm/test/Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output
+; RUN: opt < %s -simplifycfg -disable-output
 ; END.
 
 define void @main() {

diff --git a/llvm/test/Transforms/SimplifyCFG/2006-08-03-Crash.ll b/llvm/test/Transforms/SimplifyCFG/2006-08-03-Crash.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -gvn -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output
+; RUN: opt < %s -gvn -simplifycfg -disable-output
 ; PR867
 
 target datalayout = "E-p:32:32"

diff --git a/llvm/test/Transforms/SimplifyCFG/2008-12-16-DCECond.ll b/llvm/test/Transforms/SimplifyCFG/2008-12-16-DCECond.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -hoist-common-insts=true | not grep icmp
+; RUN: opt < %s -simplifycfg -S -hoist-common-insts=true | not grep icmp
 ; ModuleID = '/tmp/x.bc'
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
 target triple = "i686-pc-linux-gnu"

diff --git a/llvm/test/Transforms/SimplifyCFG/2011-09-05-TrivialLPad.ll b/llvm/test/Transforms/SimplifyCFG/2011-09-05-TrivialLPad.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
 
 ; CHECK-NOT: invoke
 ; CHECK-NOT: landingpad

diff --git a/llvm/test/Transforms/SimplifyCFG/ARM/speculate-vector-ops.ll b/llvm/test/Transforms/SimplifyCFG/ARM/speculate-vector-ops.ll
@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -simplifycfg -mtriple=thumbv8.1m.main -mattr=+mve -S %s -o - | FileCheck %s --check-prefix=CHECK-MVE
-; RUN: opt -simplifycfg -mtriple=thumbv8.1m.main -S %s -o - | FileCheck %s --check-prefix=CHECK-NOMVE
+; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -mtriple=thumbv8.1m.main -mattr=+mve -S %s -o - | FileCheck %s --check-prefix=CHECK-MVE
+; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -mtriple=thumbv8.1m.main -S %s -o - | FileCheck %s --check-prefix=CHECK-NOMVE
 
 define i32 @speculate_vector_extract(i32 %d, <4 x i32> %v) {
 ; CHECK-MVE-LABEL: @speculate_vector_extract(

diff --git a/llvm/test/Transforms/SimplifyCFG/BrUnwind.ll b/llvm/test/Transforms/SimplifyCFG/BrUnwind.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true -S | \
+; RUN: opt < %s -simplifycfg -hoist-common-insts=true -S | \
 ; RUN: not grep "br label"
 
 define void @test(i1 %C) {

diff --git a/llvm/test/Transforms/SimplifyCFG/DeadSetCC.ll b/llvm/test/Transforms/SimplifyCFG/DeadSetCC.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | \
+; RUN: opt < %s -simplifycfg -S | \
 ; RUN:   not grep "icmp eq"
 
 ; Check that simplifycfg deletes a dead 'seteq' instruction when it

diff --git a/llvm/test/Transforms/SimplifyCFG/HoistCode.ll b/llvm/test/Transforms/SimplifyCFG/HoistCode.ll
@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -passes=simplifycfg -hoist-common-insts=true -S | FileCheck %s
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -hoist-common-insts=true -S | FileCheck %s
 
 define void @foo(i1 %C, i32* %P) {
 ; CHECK-LABEL: @foo(

diff --git a/llvm/test/Transforms/SimplifyCFG/UncondBranchToReturn.ll b/llvm/test/Transforms/SimplifyCFG/UncondBranchToReturn.ll
@@ -2,7 +2,7 @@
 ; a PHI node and a return.  Make sure the simplify cfg can straighten out this
 ; important case.  This is basically the most trivial form of tail-duplication.
 
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true -S | \
+; RUN: opt < %s -simplifycfg -hoist-common-insts=true -S | \
 ; RUN:    not grep "br label"
 
 define i32 @test(i1 %B, i32 %A, i32 %B.upgrd.1) {

diff --git a/llvm/test/Transforms/SimplifyCFG/UnreachableEliminate.ll b/llvm/test/Transforms/SimplifyCFG/UnreachableEliminate.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1  -S | FileCheck %s
 
 define void @test1(i1 %C, i1* %BP) {
 ; CHECK-LABEL: @test1(

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/2010-03-30-InvokeCrash.ll b/llvm/test/Transforms/SimplifyCFG/X86/2010-03-30-InvokeCrash.ll
@@ -1,4 +1,4 @@
-; RUN: opt -simplifycfg -disable-output < %s
+; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output < %s
 ; END.
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
 target triple = "x86_64-unknown-linux-gnu"

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/CoveredLookupTable.ll b/llvm/test/Transforms/SimplifyCFG/X86/CoveredLookupTable.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -switch-to-lookup -S %s | FileCheck %s
+; RUN: opt -simplifycfg -switch-to-lookup -S %s | FileCheck %s
 ; RUN: opt -passes='simplify-cfg<switch-to-lookup>' -S %s | FileCheck %s
 ; rdar://15268442
 

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/bug-25299.ll b/llvm/test/Transforms/SimplifyCFG/X86/bug-25299.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
 
 ;; Test case for bug 25299, contributed by David Majnemer.
 

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll b/llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -switch-to-lookup -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
+; RUN: opt < %s -simplifycfg -switch-to-lookup -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
 ; RUN: opt < %s -passes='simplify-cfg<switch-to-lookup>' -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
 
 ; In the presence of "-no-jump-tables"="true", simplifycfg should not convert switches to lookup tables.

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/pr39187-g.ll b/llvm/test/Transforms/SimplifyCFG/X86/pr39187-g.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true | FileCheck %s
+; RUN: opt < %s -S -simplifycfg -hoist-common-insts=true | FileCheck %s
 
 ; SimplifyCFG can hoist any common code in the 'then' and 'else' blocks to
 ; the 'if' basic block.

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/switch-covered-bug.ll b/llvm/test/Transforms/SimplifyCFG/X86/switch-covered-bug.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
+; RUN: opt -S -simplifycfg -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
 ; RUN: opt -S -passes='simplify-cfg<switch-to-lookup>' < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
 
 ; rdar://17887153

diff --git a/llvm/test/Transforms/SimplifyCFG/X86/switch-table-bug.ll b/llvm/test/Transforms/SimplifyCFG/X86/switch-table-bug.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
+; RUN: opt -S -simplifycfg -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
 ; RUN: opt -S -passes='simplify-cfg<switch-to-lookup>' < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
 
 ; rdar://17735071

diff --git a/llvm/test/Transforms/SimplifyCFG/branch-fold.ll b/llvm/test/Transforms/SimplifyCFG/branch-fold.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
 
 define void @test(i32* %P, i32* %Q, i1 %A, i1 %B) {
 ; CHECK: test

diff --git a/llvm/test/Transforms/SimplifyCFG/branch-phi-thread.ll b/llvm/test/Transforms/SimplifyCFG/branch-phi-thread.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -adce -S | \
+; RUN: opt < %s -simplifycfg -adce -S | \
 ; RUN:   not grep "call void @f1"
 ; END.
 

diff --git a/llvm/test/Transforms/SimplifyCFG/debug-info-thread-phi.ll b/llvm/test/Transforms/SimplifyCFG/debug-info-thread-phi.ll
@@ -1,4 +1,4 @@
-; RUN: opt %s -debugify -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt %s -debugify -simplifycfg -S | FileCheck %s
 ; Tests Bug 37966
 
 define void @bar(i32 %aa) {

diff --git a/llvm/test/Transforms/SimplifyCFG/duplicate-ret-into-uncond-br.ll b/llvm/test/Transforms/SimplifyCFG/duplicate-ret-into-uncond-br.ll
@@ -0,0 +1,31 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -simplifycfg-dup-ret -S | FileCheck %s
+
+declare void @bar()
+declare void @baz()
+
+define void @foo(i1 %c) {
+; CHECK-LABEL: @foo(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br i1 [[C:%.*]], label [[TRUE:%.*]], label [[FALSE:%.*]]
+; CHECK:       true:
+; CHECK-NEXT:    call void @bar()
+; CHECK-NEXT:    ret void
+; CHECK:       false:
+; CHECK-NEXT:    call void @baz()
+; CHECK-NEXT:    ret void
+;
+entry:
+  br i1 %c, label %true, label %false
+
+true:
+  call void @bar()
+  br label %end
+
+false:
+  call void @baz()
+  br label %end
+
+end:
+  ret void
+}
diff --git a/llvm/test/Transforms/SimplifyCFG/extract-cost.ll b/llvm/test/Transforms/SimplifyCFG/extract-cost.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S  < %s | FileCheck %s
+; RUN: opt -simplifycfg -S  < %s | FileCheck %s
 
 declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1
 

diff --git a/llvm/test/Transforms/SimplifyCFG/fold-branch-to-common-dest.ll b/llvm/test/Transforms/SimplifyCFG/fold-branch-to-common-dest.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -S -simplifycfg -bonus-inst-threshold=10 | FileCheck %s
+; RUN: opt < %s -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -bonus-inst-threshold=10 | FileCheck %s
 
 declare void @sideeffect0()
 declare void @sideeffect1()

diff --git a/llvm/test/Transforms/SimplifyCFG/hoist-common-code.ll b/llvm/test/Transforms/SimplifyCFG/hoist-common-code.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -hoist-common-insts=true | not grep br
+; RUN: opt < %s -simplifycfg -S -hoist-common-insts=true | not grep br
 
 declare void @bar(i32)
 

diff --git a/llvm/test/Transforms/SimplifyCFG/hoist-with-range.ll b/llvm/test/Transforms/SimplifyCFG/hoist-with-range.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -hoist-common-insts=true -S | FileCheck %s
 
 define void @foo(i1 %c, i8* %p) {
 ; CHECK: if:

diff --git a/llvm/test/Transforms/SimplifyCFG/indirectbr.ll b/llvm/test/Transforms/SimplifyCFG/indirectbr.ll
@@ -1,4 +1,4 @@
-; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
+; RUN: opt -S -simplifycfg < %s | FileCheck %s
 
 ; SimplifyCFG should eliminate redundant indirectbr edges.
 

diff --git a/llvm/test/Transforms/SimplifyCFG/invoke_unwind.ll b/llvm/test/Transforms/SimplifyCFG/invoke_unwind.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
 
 declare void @bar()
 

diff --git a/llvm/test/Transforms/SimplifyCFG/lifetime-landingpad.ll b/llvm/test/Transforms/SimplifyCFG/lifetime-landingpad.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
 
 ; CHECK-LABEL: define void @foo
 define void @foo() personality i32 (...)* @__gxx_personality_v0 {

diff --git a/llvm/test/Transforms/SimplifyCFG/merge-duplicate-conditional-ret-val.ll b/llvm/test/Transforms/SimplifyCFG/merge-duplicate-conditional-ret-val.ll
@@ -0,0 +1,21 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -simplifycfg-dup-ret -S | FileCheck %s
+
+declare void @bar()
+declare void @baz()
+
+define i8 @foo(i1 %c, i8 %v0, i8 %v1) {
+; CHECK-LABEL: @foo(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[SPEC_SELECT:%.*]] = select i1 [[C:%.*]], i8 [[V0:%.*]], i8 [[V1:%.*]]
+; CHECK-NEXT:    ret i8 [[SPEC_SELECT]]
+;
+entry:
+  br i1 %c, label %true, label %false
+
+true:
+  ret i8 %v0
+
+false:
+  ret i8 %v1
+}
diff --git a/llvm/test/Transforms/SimplifyCFG/pr39807.ll b/llvm/test/Transforms/SimplifyCFG/pr39807.ll
@@ -1,4 +1,4 @@
-; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -hoist-common-insts=true < %s | FileCheck %s
+; RUN: opt -S -simplifycfg -hoist-common-insts=true < %s | FileCheck %s
 
 declare void @personality()
 

diff --git a/llvm/test/Transforms/SimplifyCFG/pr46638.ll b/llvm/test/Transforms/SimplifyCFG/pr46638.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
+; RUN: opt -S -simplifycfg < %s | FileCheck %s
 
 define void @pr46638(i1 %c, i32 %x) {
 ; CHECK-LABEL: @pr46638(

diff --git a/llvm/test/Transforms/SimplifyCFG/preserve-branchweights-partial.ll b/llvm/test/Transforms/SimplifyCFG/preserve-branchweights-partial.ll
@@ -1,8 +1,8 @@
-; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -o - < %s | FileCheck %s
+; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s
 
 ; This test case was written to trigger an incorrect assert statement in
 ; -simplifycfg.  Thus we don't actually want to check the output, just that
-; -simplifycfg -simplifycfg-require-and-preserve-domtree=1 ran successfully.  Thus we only check that the function still
+; -simplifycfg ran successfully.  Thus we only check that the function still
 ; exists, and that it still calls foo().
 ;
 ; NOTE: There are some obviously dead blocks and missing branch weight

diff --git a/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll b/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -o - < %s | FileCheck %s
+; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s
 
 declare void @helper(i32)
 

diff --git a/llvm/test/Transforms/SimplifyCFG/rangereduce.ll b/llvm/test/Transforms/SimplifyCFG/rangereduce.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -switch-to-lookup -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -switch-to-lookup -S | FileCheck %s
 ; RUN: opt < %s -passes='simplify-cfg<switch-to-lookup>' -S | FileCheck %s
 
 target datalayout = "e-n32"

diff --git a/llvm/test/Transforms/SimplifyCFG/switch-masked-bits.ll b/llvm/test/Transforms/SimplifyCFG/switch-masked-bits.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
+; RUN: opt -S -simplifycfg < %s | FileCheck %s
 
 define i32 @test1(i32 %x) nounwind {
 ; CHECK-LABEL: @test1(

diff --git a/llvm/test/Transforms/SimplifyCFG/switch-on-const-select.ll b/llvm/test/Transforms/SimplifyCFG/switch-on-const-select.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck -enable-var-scope %s
+; RUN: opt < %s -simplifycfg -S | FileCheck -enable-var-scope %s
 
 ; Test basic folding to a conditional branch.
 define i32 @foo(i64 %x, i64 %y) nounwind {

diff --git a/llvm/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll b/llvm/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt %s -simplifycfg -S | FileCheck %s
 
 declare i32 @f(i32)
 

diff --git a/llvm/test/Transforms/SimplifyCFG/switch-simplify-crash.ll b/llvm/test/Transforms/SimplifyCFG/switch-simplify-crash.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output
+; RUN: opt < %s -simplifycfg -disable-output
 
 define void @NewExtractNames() {
 entry:

diff --git a/llvm/test/Transforms/SimplifyCFG/switch-to-select-two-case.ll b/llvm/test/Transforms/SimplifyCFG/switch-to-select-two-case.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
 
 ; int foo1_with_default(int a) {
 ;   switch(a) {

diff --git a/llvm/test/Transforms/SimplifyCFG/switch_switch_fold.ll b/llvm/test/Transforms/SimplifyCFG/switch_switch_fold.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
 
 ; Test that a switch going to a switch on the same value can be merged.
 ; All three switches in this example can be merged into one big one.

diff --git a/llvm/test/Transforms/SimplifyCFG/switch_thread.ll b/llvm/test/Transforms/SimplifyCFG/switch_thread.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
 
 ; Test that we can thread a simple known condition through switch statements.
 

diff --git a/llvm/test/Transforms/SimplifyCFG/unprofitable-pr.ll b/llvm/test/Transforms/SimplifyCFG/unprofitable-pr.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -simplifycfg-max-small-block-size=10 -S < %s | FileCheck %s
+; RUN: opt -simplifycfg -simplifycfg-max-small-block-size=10 -S < %s | FileCheck %s
 ; RUN: opt -passes=simplify-cfg -simplifycfg-max-small-block-size=10 -S < %s | FileCheck %s
 
 target datalayout = "e-p:64:64-p5:32:32-A5"