[clang] 661cc71 - [PassManager][PhaseOrdering] lower expects before running simplifyCFG
Sanjay Patel via cfe-commits
cfe-commits at lists.llvm.org
Mon Apr 12 12:08:00 PDT 2021
Author: Sanjay Patel
Date: 2021-04-12T15:07:53-04:00
New Revision: 661cc71a1c50081389d73b2baae02f51df670ba1
URL: https://github.com/llvm/llvm-project/commit/661cc71a1c50081389d73b2baae02f51df670ba1
DIFF: https://github.com/llvm/llvm-project/commit/661cc71a1c50081389d73b2baae02f51df670ba1.diff
LOG: [PassManager][PhaseOrdering] lower expects before running simplifyCFG
Retry of 330619a3a623 that includes a clang test update.
Original commit message:
If we run passes before lowering llvm.expect intrinsics to metadata,
then those passes have no way to act on the hints provided by llvm.expect.
SimplifyCFG is the known offender, and we made it smarter about profile
metadata in D98898 <https://reviews.llvm.org/D98898>.
In the motivating example from https://llvm.org/PR49336 , this means we
were ignoring the recommended method for a programmer to tell the compiler
that a compare+branch is expensive. This change appears to solve that case -
the metadata survives to the backend, the compare order is as expected in IR,
and the backend does not do anything to reverse it.
We make the same change to the old pass manager to keep things synchronized.
Differential Revision: https://reviews.llvm.org/D100213
Added:
Modified:
clang/test/CodeGen/thinlto-distributed-newpm.ll
llvm/lib/Passes/PassBuilder.cpp
llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
llvm/test/CodeGen/AMDGPU/opt-pipeline.ll
llvm/test/Other/new-pm-defaults.ll
llvm/test/Other/new-pm-pgo.ll
llvm/test/Other/new-pm-thinlto-defaults.ll
llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll
llvm/test/Other/opt-O2-pipeline.ll
llvm/test/Other/opt-O3-pipeline-enable-matrix.ll
llvm/test/Other/opt-O3-pipeline.ll
llvm/test/Other/opt-Os-pipeline.ll
llvm/test/Transforms/PhaseOrdering/expect.ll
Removed:
################################################################################
diff --git a/clang/test/CodeGen/thinlto-distributed-newpm.ll b/clang/test/CodeGen/thinlto-distributed-newpm.ll
index 1e9d5d4d2629c..398b65116bbd7 100644
--- a/clang/test/CodeGen/thinlto-distributed-newpm.ll
+++ b/clang/test/CodeGen/thinlto-distributed-newpm.ll
@@ -31,6 +31,7 @@
; CHECK-O: Running analysis: OptimizationRemarkEmitterAnalysis on main
; CHECK-O: Running pass: InferFunctionAttrsPass
; CHECK-O: Starting {{.*}}Function pass manager run.
+; CHECK-O: Running pass: LowerExpectIntrinsicPass on main
; CHECK-O: Running pass: SimplifyCFGPass on main
; CHECK-O: Running analysis: TargetIRAnalysis on main
; CHECK-O: Running analysis: AssumptionAnalysis on main
@@ -38,7 +39,6 @@
; CHECK-O: Running analysis: DominatorTreeAnalysis on main
; CHECK-O: Running pass: EarlyCSEPass on main
; CHECK-O: Running analysis: TargetLibraryAnalysis on main
-; CHECK-O: Running pass: LowerExpectIntrinsicPass on main
; CHECK-O3: Running pass: CallSiteSplittingPass on main
; CHECK-O: Finished {{.*}}Function pass manager run.
; CHECK-O: Running pass: LowerTypeTestsPass
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index 6307e468e7017..75ba9da4214d7 100644
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -1066,10 +1066,12 @@ PassBuilder::buildModuleSimplificationPipeline(OptimizationLevel Level,
// Create an early function pass manager to cleanup the output of the
// frontend.
FunctionPassManager EarlyFPM(DebugLogging);
+ // Lower llvm.expect to metadata before attempting transforms.
+ // Compare/branch metadata may alter the behavior of passes like SimplifyCFG.
+ EarlyFPM.addPass(LowerExpectIntrinsicPass());
EarlyFPM.addPass(SimplifyCFGPass());
EarlyFPM.addPass(SROA());
EarlyFPM.addPass(EarlyCSEPass());
- EarlyFPM.addPass(LowerExpectIntrinsicPass());
if (PTO.Coroutines)
EarlyFPM.addPass(CoroEarlyPass());
if (Level == OptimizationLevel::O3)
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
index 2c80a16febeff..19e212f738ade 100644
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -316,10 +316,12 @@ void PassManagerBuilder::populateFunctionPassManager(
addInitialAliasAnalysisPasses(FPM);
+ // Lower llvm.expect to metadata before attempting transforms.
+ // Compare/branch metadata may alter the behavior of passes like SimplifyCFG.
+ FPM.add(createLowerExpectIntrinsicPass());
FPM.add(createCFGSimplificationPass());
FPM.add(createSROAPass());
FPM.add(createEarlyCSEPass());
- FPM.add(createLowerExpectIntrinsicPass());
}
// Do PGO instrumentation generation or use pass as the option specified.
diff --git a/llvm/test/CodeGen/AMDGPU/opt-pipeline.ll b/llvm/test/CodeGen/AMDGPU/opt-pipeline.ll
index 5a05310177bb6..3ba9099176d8f 100644
--- a/llvm/test/CodeGen/AMDGPU/opt-pipeline.ll
+++ b/llvm/test/CodeGen/AMDGPU/opt-pipeline.ll
@@ -41,11 +41,11 @@
; GCN-O1-NEXT: Basic Alias Analysis (stateless AA impl)
; GCN-O1-NEXT: Function Alias Analysis Results
; GCN-O1-NEXT: Simplify well-known AMD library calls
+; GCN-O1-NEXT: Lower 'expect' Intrinsics
; GCN-O1-NEXT: Simplify the CFG
; GCN-O1-NEXT: Dominator Tree Construction
; GCN-O1-NEXT: SROA
; GCN-O1-NEXT: Early CSE
-; GCN-O1-NEXT: Lower 'expect' Intrinsics
; GCN-O1-NEXT: Pass Arguments:
; GCN-O1-NEXT: Target Library Information
@@ -350,11 +350,11 @@
; GCN-O2-NEXT: Basic Alias Analysis (stateless AA impl)
; GCN-O2-NEXT: Function Alias Analysis Results
; GCN-O2-NEXT: Simplify well-known AMD library calls
+; GCN-O2-NEXT: Lower 'expect' Intrinsics
; GCN-O2-NEXT: Simplify the CFG
; GCN-O2-NEXT: Dominator Tree Construction
; GCN-O2-NEXT: SROA
; GCN-O2-NEXT: Early CSE
-; GCN-O2-NEXT: Lower 'expect' Intrinsics
; GCN-O2-NEXT: Pass Arguments:
; GCN-O2-NEXT: Target Library Information
@@ -704,11 +704,11 @@
; GCN-O3-NEXT: Basic Alias Analysis (stateless AA impl)
; GCN-O3-NEXT: Function Alias Analysis Results
; GCN-O3-NEXT: Simplify well-known AMD library calls
+; GCN-O3-NEXT: Lower 'expect' Intrinsics
; GCN-O3-NEXT: Simplify the CFG
; GCN-O3-NEXT: Dominator Tree Construction
; GCN-O3-NEXT: SROA
; GCN-O3-NEXT: Early CSE
-; GCN-O3-NEXT: Lower 'expect' Intrinsics
; GCN-O3-NEXT: Pass Arguments:
; GCN-O3-NEXT: Target Library Information
diff --git a/llvm/test/Other/new-pm-defaults.ll b/llvm/test/Other/new-pm-defaults.ll
index 8dc54e4ccb84e..ae268fd0c3a36 100644
--- a/llvm/test/Other/new-pm-defaults.ll
+++ b/llvm/test/Other/new-pm-defaults.ll
@@ -79,6 +79,7 @@
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Running analysis: PreservedCFGCheckerAnalysis on foo
; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
@@ -86,7 +87,6 @@
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
-; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Finished llvm::Function pass manager run.
; CHECK-EP-PIPELINE-EARLY-SIMPLIFICATION-NEXT: Running pass: NoOpModulePass
diff --git a/llvm/test/Other/new-pm-pgo.ll b/llvm/test/Other/new-pm-pgo.ll
index 09fd103e172b5..b2f6b666150a2 100644
--- a/llvm/test/Other/new-pm-pgo.ll
+++ b/llvm/test/Other/new-pm-pgo.ll
@@ -20,10 +20,10 @@
; USE_POST_LINK: Running pass: PGOMemOPSizeOpt
; SAMPLE_USE_O: Running pass: AddDiscriminatorsPass
; SAMPLE_USE_PRE_LINK: Running pass: AddDiscriminatorsPass
+; SAMPLE_USE: Running pass: LowerExpectIntrinsicPass
; SAMPLE_USE: Running pass: SimplifyCFGPass
; SAMPLE_USE: Running pass: SROA
; SAMPLE_USE: Running pass: EarlyCSEPass
-; SAMPLE_USE: Running pass: LowerExpectIntrinsicPass
; SAMPLE_USE_POST_LINK: Running pass: InstCombinePass
; SAMPLE_USE: Running pass: SampleProfileLoaderPass
; SAMPLE_USE_O: Running pass: PGOIndirectCallPromotion
diff --git a/llvm/test/Other/new-pm-thinlto-defaults.ll b/llvm/test/Other/new-pm-thinlto-defaults.ll
index 46620aea31db1..ceb024074796e 100644
--- a/llvm/test/Other/new-pm-thinlto-defaults.ll
+++ b/llvm/test/Other/new-pm-thinlto-defaults.ll
@@ -64,6 +64,7 @@
; CHECK-PRELINK-O-NODIS-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Starting llvm::Function pass manager run.
+; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
@@ -71,7 +72,6 @@
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
-; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Finished llvm::Function pass manager run.
; CHECK-POSTLINK-O-NEXT: Running pass: LowerTypeTestsPass
diff --git a/llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll b/llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
index ed0e17175fd0c..77a556c278b48 100644
--- a/llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
+++ b/llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
@@ -34,6 +34,7 @@
; CHECK-O-NEXT: Running pass: InferFunctionAttrsPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Starting {{.*}}Function pass manager run.
+; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
@@ -41,7 +42,6 @@
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
-; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Finished {{.*}}Function pass manager run.
; CHECK-O-NEXT: Running pass: LowerTypeTestsPass
diff --git a/llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll b/llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
index 05e7a887271e1..b66b28f266786 100644
--- a/llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
+++ b/llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
@@ -36,6 +36,7 @@
; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Starting {{.*}}Function pass manager run.
+; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
@@ -43,7 +44,6 @@
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
-; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Running pass: InstCombinePass on foo
; CHECK-O-NEXT: Running analysis: OptimizationRemarkEmitterAnalysis on foo
diff --git a/llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll b/llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
index e1bab9c6fc7cb..0d7a1c44e0c2a 100644
--- a/llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
+++ b/llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
@@ -35,6 +35,7 @@
; CHECK-O-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Starting {{.*}}Function pass manager run.
+; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
@@ -42,7 +43,6 @@
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
-; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Finished {{.*}}Function pass manager run.
; CHECK-O-NEXT: Running pass: IPSCCPPass
diff --git a/llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll b/llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll
index c2412ff4073d6..e577e837e8e74 100644
--- a/llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll
+++ b/llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll
@@ -34,6 +34,7 @@
; CHECK-O-NEXT: Running pass: InferFunctionAttrsPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
; CHECK-O-NEXT: Starting {{.*}}Function pass manager run.
+; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running analysis: TargetIRAnalysis
; CHECK-O-NEXT: Running analysis: AssumptionAnalysis
@@ -41,7 +42,6 @@
; CHECK-O-NEXT: Running analysis: DominatorTreeAnalysis
; CHECK-O-NEXT: Running pass: EarlyCSEPass
; CHECK-O-NEXT: Running analysis: TargetLibraryAnalysis
-; CHECK-O-NEXT: Running pass: LowerExpectIntrinsicPass
; CHECK-O3-NEXT: Running pass: CallSiteSplittingPass
; CHECK-O-NEXT: Running pass: InstCombinePass on foo
; CHECK-O-NEXT: Running analysis: OptimizationRemarkEmitterAnalysis on foo
diff --git a/llvm/test/Other/opt-O2-pipeline.ll b/llvm/test/Other/opt-O2-pipeline.ll
index af7093b0bd53f..36370d6cd6d39 100644
--- a/llvm/test/Other/opt-O2-pipeline.ll
+++ b/llvm/test/Other/opt-O2-pipeline.ll
@@ -12,11 +12,11 @@
; CHECK-NEXT: Module Verifier
; CHECK-EXT: Good Bye World Pass
; CHECK-NOEXT-NOT: Good Bye World Pass
+; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: SROA
; CHECK-NEXT: Early CSE
-; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: Target Transform Information
diff --git a/llvm/test/Other/opt-O3-pipeline-enable-matrix.ll b/llvm/test/Other/opt-O3-pipeline-enable-matrix.ll
index 12b5e188e508a..e5d9e51402354 100644
--- a/llvm/test/Other/opt-O3-pipeline-enable-matrix.ll
+++ b/llvm/test/Other/opt-O3-pipeline-enable-matrix.ll
@@ -12,11 +12,11 @@
; CHECK-NEXT: Module Verifier
; CHECK-EXT: Good Bye World Pass
; CHECK-NOEXT-NOT: Good Bye World Pass
+; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: SROA
; CHECK-NEXT: Early CSE
-; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: Target Transform Information
diff --git a/llvm/test/Other/opt-O3-pipeline.ll b/llvm/test/Other/opt-O3-pipeline.ll
index bee06f816a532..af77e09c24968 100644
--- a/llvm/test/Other/opt-O3-pipeline.ll
+++ b/llvm/test/Other/opt-O3-pipeline.ll
@@ -12,11 +12,11 @@
; CHECK-NEXT: Module Verifier
; CHECK-EXT: Good Bye World Pass
; CHECK-NOEXT-NOT: Good Bye World Pass
+; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: SROA
; CHECK-NEXT: Early CSE
-; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: Target Transform Information
diff --git a/llvm/test/Other/opt-Os-pipeline.ll b/llvm/test/Other/opt-Os-pipeline.ll
index 5d7ce952a78e8..e24d3d3f57bfc 100644
--- a/llvm/test/Other/opt-Os-pipeline.ll
+++ b/llvm/test/Other/opt-Os-pipeline.ll
@@ -12,11 +12,11 @@
; CHECK-NEXT: Module Verifier
; CHECK-EXT: Good Bye World Pass
; CHECK-NOEXT-NOT: Good Bye World Pass
+; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Simplify the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: SROA
; CHECK-NEXT: Early CSE
-; CHECK-NEXT: Lower 'expect' Intrinsics
; CHECK-NEXT: Pass Arguments:
; CHECK-NEXT: Target Library Information
; CHECK-NEXT: Target Transform Information
diff --git a/llvm/test/Transforms/PhaseOrdering/expect.ll b/llvm/test/Transforms/PhaseOrdering/expect.ll
index 14a9284baa5eb..3a23785ddff78 100644
--- a/llvm/test/Transforms/PhaseOrdering/expect.ll
+++ b/llvm/test/Transforms/PhaseOrdering/expect.ll
@@ -1,7 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -O2 -S < %s | FileCheck %s
-; FIXME:
; Given an "expect" on a compare, we should not combine
; that compare with other instructions in a way that the
; backend can't undo. Expect lowering becomes metadata,
@@ -10,10 +9,11 @@
define void @PR49336(i32 %delta, i32 %tag_type, i8* %ip) {
; CHECK-LABEL: @PR49336(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TOBOOL:%.*]] = icmp slt i32 [[DELTA:%.*]], 0
-; CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[TAG_TYPE:%.*]], 0
-; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[TOBOOL]], [[CMP1]]
-; CHECK-NEXT: br i1 [[OR_COND]], label [[IF_THEN2:%.*]], label [[IF_END3:%.*]]
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[DELTA:%.*]], 0
+; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END3:%.*]], !prof !0
+; CHECK: if.then:
+; CHECK-NEXT: [[CMP1_NOT:%.*]] = icmp eq i32 [[TAG_TYPE:%.*]], 0
+; CHECK-NEXT: br i1 [[CMP1_NOT]], label [[IF_END3]], label [[IF_THEN2:%.*]]
; CHECK: if.then2:
; CHECK-NEXT: store i8 42, i8* [[IP:%.*]], align 1
; CHECK-NEXT: br label [[IF_END3]]
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