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[EntryExitInstrumenter] Move passes out of clang into LLVM default pi…
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…pelines (#92171)

Move EntryExitInstrumenter(PostInlining=true) to as late as possible and
EntryExitInstrumenter(PostInlining=false) to an early pre-inlining stage
(but skip for ThinLTO post-link).

This should fix the issues reported in
rust-lang/rust#92109 and
#52853. These are caused
by https://reviews.llvm.org/D97608.
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@pasko
pasko committed May 31, 2024
1 parent 6119340 commit cab81dd
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Showing 36 changed files with 268 additions and 162 deletions.
17 changes: 0 additions & 17 deletions clang/lib/CodeGen/BackendUtil.cpp
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Expand Up @@ -85,7 +85,6 @@
#include "llvm/Transforms/Scalar/GVN.h"
#include "llvm/Transforms/Scalar/JumpThreading.h"
#include "llvm/Transforms/Utils/Debugify.h"
#include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
#include <memory>
#include <optional>
Expand Down Expand Up @@ -983,22 +982,6 @@ void EmitAssemblyHelper::RunOptimizationPipeline(
/*DropTypeTests=*/true));
});

if (CodeGenOpts.InstrumentFunctions ||
CodeGenOpts.InstrumentFunctionEntryBare ||
CodeGenOpts.InstrumentFunctionsAfterInlining ||
CodeGenOpts.InstrumentForProfiling) {
PB.registerPipelineStartEPCallback(
[](ModulePassManager &MPM, OptimizationLevel Level) {
MPM.addPass(createModuleToFunctionPassAdaptor(
EntryExitInstrumenterPass(/*PostInlining=*/false)));
});
PB.registerOptimizerLastEPCallback(
[](ModulePassManager &MPM, OptimizationLevel Level) {
MPM.addPass(createModuleToFunctionPassAdaptor(
EntryExitInstrumenterPass(/*PostInlining=*/true)));
});
}

// Register callbacks to schedule sanitizer passes at the appropriate part
// of the pipeline.
if (LangOpts.Sanitize.has(SanitizerKind::LocalBounds))
Expand Down
39 changes: 11 additions & 28 deletions clang/test/CodeGen/X86/x86_64-instrument-functions.c
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@@ -1,37 +1,20 @@
// REQUIRES: x86-registered-target
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -finstrument-functions -O0 -o - -emit-llvm %s | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -finstrument-functions -O2 -o - -emit-llvm %s | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -finstrument-functions-after-inlining -O2 -o - -emit-llvm %s | FileCheck -check-prefix=NOINLINE %s
// RUN: %clang_cc1 -disable-llvm-passes -triple x86_64-unknown-unknown -finstrument-functions -O0 -o - -emit-llvm %s | FileCheck %s
// RUN: %clang_cc1 -disable-llvm-passes -triple x86_64-unknown-unknown -finstrument-functions -O2 -o - -emit-llvm %s | FileCheck %s
// RUN: %clang_cc1 -disable-llvm-passes -triple x86_64-unknown-unknown -finstrument-functions-after-inlining -O2 -o - -emit-llvm %s | FileCheck -check-prefix=NOINLINE %s

__attribute__((always_inline)) int leaf(int x) {
return x;
// CHECK-LABEL: define {{.*}} @leaf
// CHECK: call void @__cyg_profile_func_enter
// CHECK-NOT: cyg_profile
// CHECK: call void @__cyg_profile_func_exit
// CHECK-NOT: cyg_profile
// CHECK: ret
// CHECK-LABEL: define {{.*}} @leaf(i32 noundef %x) #0 {
}

int root(int x) {
return leaf(x);
// CHECK-LABEL: define {{.*}} @root
// CHECK: call void @__cyg_profile_func_enter
// CHECK-NOT: cyg_profile

// Inlined from leaf():
// CHECK: call void @__cyg_profile_func_enter
// CHECK-NOT: cyg_profile
// CHECK: call void @__cyg_profile_func_exit
// CHECK-NOT: cyg_profile

// CHECK: call void @__cyg_profile_func_exit
// CHECK: ret

// NOINLINE-LABEL: define {{.*}} @root
// NOINLINE: call void @__cyg_profile_func_enter
// NOINLINE-NOT: cyg_profile
// NOINLINE: call void @__cyg_profile_func_exit
// NOINLINE-NOT: cyg_profile
// NOINLINE: ret
// CHECK-LABEL: define {{.*}} @root(i32 noundef %x) #1 {
// NOINLINE-LABEL: define {{.*}} @root(i32 noundef %x) #1 {
}

// CHECK: attributes #0 = { {{.*}}"instrument-function-entry"="__cyg_profile_func_enter" "instrument-function-exit"="__cyg_profile_func_exit"
// CHECK: attributes #1 = { {{.*}}"instrument-function-entry"="__cyg_profile_func_enter" "instrument-function-exit"="__cyg_profile_func_exit"
// NOINLINE: attributes #0 = { {{.*}}"instrument-function-entry-inlined"="__cyg_profile_func_enter" "instrument-function-exit-inlined"="__cyg_profile_func_exit"
// NOINLINE: attributes #1 = { {{.*}}"instrument-function-entry-inlined"="__cyg_profile_func_enter" "instrument-function-exit-inlined"="__cyg_profile_func_exit"
32 changes: 14 additions & 18 deletions clang/test/CodeGen/instrument-objc-method.m
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@@ -1,34 +1,30 @@
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -debug-info-kind=standalone -emit-llvm -o - %s -finstrument-functions | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -debug-info-kind=standalone -emit-llvm -o - %s -finstrument-function-entry-bare | FileCheck -check-prefix=BARE %s
// RUN: %clang_cc1 -disable-llvm-passes -triple x86_64-apple-darwin10 -debug-info-kind=standalone -emit-llvm -o - %s -finstrument-functions | FileCheck -check-prefix=PREINLINE %s
// RUN: %clang_cc1 -disable-llvm-passes -triple x86_64-apple-darwin10 -debug-info-kind=standalone -emit-llvm -o - %s -finstrument-function-entry-bare | FileCheck -check-prefix=BARE %s

@interface ObjCClass
@end

@implementation ObjCClass

// CHECK: @"\01+[ObjCClass initialize]"
// CHECK: call void @__cyg_profile_func_enter
// CHECK: call void @__cyg_profile_func_exit
// BARE: @"\01+[ObjCClass initialize]"
// BARE: call void @__cyg_profile_func_enter
// PREINLINE: @"\01+[ObjCClass initialize]"{{\(.*\)}} #0
// BARE: @"\01+[ObjCClass initialize]"{{\(.*\)}} #0
+ (void)initialize {
}

// CHECK: @"\01+[ObjCClass load]"
// CHECK-NOT: call void @__cyg_profile_func_enter
// BARE: @"\01+[ObjCClass load]"
// BARE-NOT: call void @__cyg_profile_func_enter
// PREINLINE: declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
// BARE: @"\01+[ObjCClass load]"{{\(.*\)}} #2
+ (void)load __attribute__((no_instrument_function)) {
}

// CHECK: @"\01-[ObjCClass dealloc]"
// CHECK-NOT: call void @__cyg_profile_func_enter
// BARE: @"\01-[ObjCClass dealloc]"
// BARE-NOT: call void @__cyg_profile_func_enter
// PREINLINE: @"\01-[ObjCClass dealloc]"{{\(.*\)}} #2
// BARE: @"\01-[ObjCClass dealloc]"{{\(.*\)}} #2
- (void)dealloc __attribute__((no_instrument_function)) {
}

// CHECK: declare void @__cyg_profile_func_enter(ptr, ptr)
// CHECK: declare void @__cyg_profile_func_exit(ptr, ptr)
// BARE: declare void @__cyg_profile_func_enter_bare
// PREINLINE: attributes #0 = { {{.*}}"instrument-function-entry"="__cyg_profile_func_enter"
// PREINLINE-NOT: attributes #0 = { {{.*}}"instrument-function-entry"="__cyg_profile_func_enter_bare"
// PREINLINE-NOT: attributes #2 = { {{.*}}"__cyg_profile_func_enter"
// BARE: attributes #0 = { {{.*}}"instrument-function-entry-inlined"="__cyg_profile_func_enter_bare"
// BARE-NOT: attributes #0 = { {{.*}}"__cyg_profile_func_enter"
// BARE-NOT: attributes #2 = { {{.*}}"__cyg_profile_func_enter_bare"
@end
6 changes: 4 additions & 2 deletions clang/test/CodeGen/lto-newpm-pipeline.c
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Expand Up @@ -27,8 +27,9 @@

// CHECK-FULL-O0: Running pass: VerifierPass
// CHECK-FULL-O0-NEXT: Running analysis: VerifierAnalysis
// CHECK-FULL-O0-NEXT: Running pass: AlwaysInlinerPass
// CHECK-FULL-O0-NEXT: Running analysis: InnerAnalysisManagerProxy
// CHECK-FULL-O0-NEXT: Running pass: EntryExitInstrumenterPass
// CHECK-FULL-O0-NEXT: Running pass: AlwaysInlinerPass
// CHECK-FULL-O0-NEXT: Running analysis: ProfileSummaryAnalysis
// CHECK-FULL-O0-NEXT: Running pass: CoroConditionalWrapper
// CHECK-FULL-O0-NEXT: Running pass: CanonicalizeAliasesPass
Expand All @@ -40,8 +41,9 @@

// CHECK-THIN-O0: Running pass: VerifierPass
// CHECK-THIN-O0-NEXT: Running analysis: VerifierAnalysis
// CHECK-THIN-O0-NEXT: Running pass: AlwaysInlinerPass
// CHECK-THIN-O0-NEXT: Running analysis: InnerAnalysisManagerProxy
// CHECK-THIN-O0-NEXT: Running pass: EntryExitInstrumenterPass
// CHECK-THIN-O0-NEXT: Running pass: AlwaysInlinerPass
// CHECK-THIN-O0-NEXT: Running analysis: ProfileSummaryAnalysis
// CHECK-THIN-O0-NEXT: Running pass: CoroConditionalWrapper
// CHECK-THIN-O0-NEXT: Running pass: CanonicalizeAliasesPass
Expand Down
24 changes: 6 additions & 18 deletions clang/test/CodeGen/mcount-aix.c
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@@ -1,25 +1,13 @@
// RUN: %clang_cc1 -pg -triple powerpc-ibm-aix7.2.0.0 -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -pg -triple powerpc64-ibm-aix7.2.0.0 -emit-llvm %s -o - | FileCheck %s -check-prefix=CHECK64
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc-ibm-aix7.2.0.0 -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc64-ibm-aix7.2.0.0 -emit-llvm %s -o - | FileCheck %s

void foo() {
// CHECK: define void @foo() #0 {
}

void bar() {
// CHECK: define void @bar() #0 {
foo();
}
// CHECK: @[[GLOB0:[0-9]+]] = internal global i32 0
// CHECK: @[[GLOB1:[0-9]+]] = internal global i32 0
// CHECK64: @[[GLOB0:[0-9]+]] = internal global i64 0
// CHECK64: @[[GLOB1:[0-9]+]] = internal global i64 0
// CHECK-LABEL: @foo(
// CHECK-NEXT: entry:
// CHECK-NEXT: call void @__mcount(ptr @[[GLOB0]])
// CHECK64-LABEL: @foo(
// CHECK64-NEXT: entry:
// CHECK64-NEXT: call void @__mcount(ptr @[[GLOB0]])
// CHECK-LABEL: @bar(
// CHECK-NEXT: entry:
// CHECK-NEXT: call void @__mcount(ptr @[[GLOB1]])
// CHECK64-LABEL: @bar(
// CHECK64-NEXT: entry:
// CHECK64-NEXT: call void @__mcount(ptr @[[GLOB1]])

// CHECK: attributes #0 = { {{.*}}"instrument-function-entry-inlined"="__mcount"
84 changes: 41 additions & 43 deletions clang/test/CodeGen/mcount.c
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@@ -1,60 +1,58 @@
// RUN: %clang_cc1 -pg -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -pg -triple i386-unknown-unknown -emit-llvm -O2 -o - %s | FileCheck %s
// RUN: %clang_cc1 -pg -triple powerpc-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple powerpc64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple powerpc64le-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple i386-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple x86_64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple arm-netbsd-eabi -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple aarch64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple loongarch32 -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple loongarch64 -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple mips-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple mips-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple mipsel-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple mips64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple mips64el-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv32-elf -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv64-elf -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv32-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv64-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv64-freebsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv64-freebsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple riscv64-openbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple powerpc-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple powerpc64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple powerpc64le-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple sparc-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -pg -triple sparc64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s -check-prefix=NO-MCOUNT
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple i386-unknown-unknown -emit-llvm -O2 -o - %s | FileCheck %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc64le-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple i386-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple x86_64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple arm-netbsd-eabi -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple aarch64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple loongarch32 -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple loongarch64 -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple mips-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple mips-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple mipsel-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple mips64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple mips64el-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv32-elf -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv64-elf -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv32-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv64-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv64-freebsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv64-freebsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple riscv64-openbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple powerpc64le-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple sparc-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -pg -triple sparc64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
// RUN: %clang_cc1 -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s -check-prefix=NO-MCOUNT

int bar(void) {
// CHECK: define dso_local i32 @bar() #0 {
return 0;
}

int foo(void) {
// CHECK: define dso_local i32 @foo() #0 {
return bar();
}

int __attribute__((no_instrument_function)) no_instrument(void) {
// CHECK: define dso_local i32 @no_instrument() #1 {
return foo();
}

int main(void) {
// CHECK: define dso_local i32 @main() #0 {
return no_instrument();
}

// CHECK: call void @mcount
// CHECK: call void @mcount
// CHECK: call void @mcount
// CHECK-NOT: call void @mcount
// CHECK-PREFIXED: call void @_mcount
// CHECK-PREFIXED: call void @_mcount
// CHECK-PREFIXED: call void @_mcount
// CHECK-PREFIXED-NOT: call void @_mcount
// CHECK-DOUBLE-PREFIXED: call void @__mcount
// CHECK-DOUBLE-PREFIXED: call void @__mcount
// CHECK-DOUBLE-PREFIXED: call void @__mcount
// CHECK-DOUBLE-PREFIXED-NOT: call void @__mcount
// NO-MCOUNT-NOT: call void @{{.*}}mcount
// NO-MCOUNT1-NOT: call void @{{.*}}mcount
// CHECK: attributes #0 = { {{.*}} "instrument-function-entry-inlined"="mcount"
// CHECK-NOT: attributes #1 = { {{.*}}"mcount"
// CHECK-PREFIXED: attributes #0 = { {{.*}} "instrument-function-entry-inlined"="_mcount"
// CHECK-PREFIXED-NOT: attributes #1 = { {{.*}}"_mcount"
// CHECK-DOUBLE-PREFIXED: attributes #0 = { {{.*}} "instrument-function-entry-inlined"="__mcount"
// CHECK-DOUBLE-PREFIXED-NOT: attributes #1 = { {{.*}}"__mcount"
// NO-MCOUNT-NOT: attributes{{.*}}mcount
// NO-MCOUNT1-NOT: attributes{{.*}}mcount
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