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InstrProf: Use LLVM's -instrprof pass for profiling

Browse Source 
The logic for lowering profiling counters has been moved to an LLVM
pass. Emit the intrinsics rather than duplicating the whole pass in
clang.

llvm-svn: 223683
This commit is contained in:
Justin Bogner
2014-12-08 19:04:51 +00:00
parent 903f3db7ac
commit 970ac60573
11 changed files with 70 additions and 287 deletions
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6
clang/lib/CodeGen/BackendUtil.cpp
View File

@@ -366,6 +366,12 @@ void EmitAssemblyHelper::CreatePasses() {
MPM->add(createStripSymbolsPass(true));
}
if (CodeGenOpts.ProfileInstrGenerate) {
InstrProfOptions Options;
Options.NoRedZone = CodeGenOpts.DisableRedZone;
MPM->add(createInstrProfilingPass(Options));
}
PMBuilder.populateModulePassManager(*MPM);
}

2
clang/lib/CodeGen/CGBlocks.cpp
View File

@@ -1215,8 +1215,6 @@ CodeGenFunction::GenerateBlockFunction(GlobalDecl GD,
RegionCounter Cnt = getPGORegionCounter(blockDecl->getBody());
Cnt.beginRegion(Builder);
EmitStmt(blockDecl->getBody());
PGO.emitInstrumentationData();
PGO.destroyRegionCounters();
}
// Remember where we were...

2
clang/lib/CodeGen/CGObjC.cpp
View File

@@ -508,8 +508,6 @@ void CodeGenFunction::GenerateObjCMethod(const ObjCMethodDecl *OMD) {
Cnt.beginRegion(Builder);
EmitCompoundStmtWithoutScope(*cast<CompoundStmt>(OMD->getBody()));
FinishFunction(OMD->getBodyRBrace());
PGO.emitInstrumentationData();
PGO.destroyRegionCounters();
}
/// emitStructGetterCall - Call the runtime function to load a property

2
clang/lib/CodeGen/CGStmt.cpp
View File

@@ -2208,8 +2208,6 @@ CodeGenFunction::GenerateCapturedStmtFunction(const CapturedStmt &S) {
PGO.assignRegionCounters(CD, F);
CapturedStmtInfo->EmitBody(*this, CD->getBody());
FinishFunction(CD->getBodyRBrace());
PGO.emitInstrumentationData();
PGO.destroyRegionCounters();
return F;
}

3
clang/lib/CodeGen/CodeGenFunction.cpp
View File

@@ -916,9 +916,6 @@ void CodeGenFunction::GenerateCode(GlobalDecl GD, llvm::Function *Fn,
// a quick pass now to see if we can.
if (!CurFn->doesNotThrow())
TryMarkNoThrow(CurFn);
PGO.emitInstrumentationData();
PGO.destroyRegionCounters();
}
/// ContainsLabel - Return true if the statement contains a label in it. If

3
clang/lib/CodeGen/CodeGenModule.cpp
View File

@@ -345,9 +345,6 @@ void CodeGenModule::Release() {
if (ObjCRuntime)
if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction())
AddGlobalCtor(ObjCInitFunction);
if (getCodeGenOpts().ProfileInstrGenerate)
if (llvm::Function *PGOInit = CodeGenPGO::emitInitialization(*this))
AddGlobalCtor(PGOInit, 0);
if (PGOReader && PGOStats.hasDiagnostics())
PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
EmitCtorList(GlobalCtors, "llvm.global_ctors");

286
clang/lib/CodeGen/CodeGenPGO.cpp
View File

@@ -16,6 +16,7 @@
#include "CoverageMappingGen.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/AST/StmtVisitor.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/ProfileData/InstrProfReader.h"
#include "llvm/Support/Endian.h"
@@ -46,190 +47,33 @@ void CodeGenPGO::setFuncName(StringRef Name,
else
FuncName = FuncName.insert(0, CGM.getCodeGenOpts().MainFileName + ":");
}
// If we're generating a profile, create a variable for the name.
if (CGM.getCodeGenOpts().ProfileInstrGenerate)
createFuncNameVar(Linkage);
}
void CodeGenPGO::setFuncName(llvm::Function *Fn) {
setFuncName(Fn->getName(), Fn->getLinkage());
}
void CodeGenPGO::setVarLinkage(llvm::GlobalValue::LinkageTypes Linkage) {
// Set the linkage for variables based on the function linkage. Usually, we
// want to match it, but available_externally and extern_weak both have the
// wrong semantics.
VarLinkage = Linkage;
switch (VarLinkage) {
case llvm::GlobalValue::ExternalWeakLinkage:
VarLinkage = llvm::GlobalValue::LinkOnceAnyLinkage;
break;
case llvm::GlobalValue::AvailableExternallyLinkage:
VarLinkage = llvm::GlobalValue::LinkOnceODRLinkage;
break;
default:
break;
}
}
void CodeGenPGO::createFuncNameVar(llvm::GlobalValue::LinkageTypes Linkage) {
// Usually, we want to match the function's linkage, but
// available_externally and extern_weak both have the wrong semantics.
if (Linkage == llvm::GlobalValue::ExternalWeakLinkage)
Linkage = llvm::GlobalValue::LinkOnceAnyLinkage;
else if (Linkage == llvm::GlobalValue::AvailableExternallyLinkage)
Linkage = llvm::GlobalValue::LinkOnceODRLinkage;
static llvm::Function *getRegisterFunc(CodeGenModule &CGM) {
return CGM.getModule().getFunction("__llvm_profile_register_functions");
}
auto *Value =
llvm::ConstantDataArray::getString(CGM.getLLVMContext(), FuncName, false);
FuncNameVar =
new llvm::GlobalVariable(CGM.getModule(), Value->getType(), true, Linkage,
Value, "__llvm_profile_name_" + FuncName);
static llvm::BasicBlock *getOrInsertRegisterBB(CodeGenModule &CGM) {
// Don't do this for Darwin. compiler-rt uses linker magic.
if (CGM.getTarget().getTriple().isOSDarwin())
return nullptr;
// Only need to insert this once per module.
if (llvm::Function *RegisterF = getRegisterFunc(CGM))
return &RegisterF->getEntryBlock();
// Construct the function.
auto *VoidTy = llvm::Type::getVoidTy(CGM.getLLVMContext());
auto *RegisterFTy = llvm::FunctionType::get(VoidTy, false);
auto *RegisterF = llvm::Function::Create(RegisterFTy,
llvm::GlobalValue::InternalLinkage,
"__llvm_profile_register_functions",
&CGM.getModule());
RegisterF->setUnnamedAddr(true);
if (CGM.getCodeGenOpts().DisableRedZone)
RegisterF->addFnAttr(llvm::Attribute::NoRedZone);
// Construct and return the entry block.
auto *BB = llvm::BasicBlock::Create(CGM.getLLVMContext(), "", RegisterF);
CGBuilderTy Builder(BB);
Builder.CreateRetVoid();
return BB;
}
static llvm::Constant *getOrInsertRuntimeRegister(CodeGenModule &CGM) {
auto *VoidTy = llvm::Type::getVoidTy(CGM.getLLVMContext());
auto *VoidPtrTy = llvm::Type::getInt8PtrTy(CGM.getLLVMContext());
auto *RuntimeRegisterTy = llvm::FunctionType::get(VoidTy, VoidPtrTy, false);
return CGM.getModule().getOrInsertFunction("__llvm_profile_register_function",
RuntimeRegisterTy);
}
static bool isMachO(const CodeGenModule &CGM) {
return CGM.getTarget().getTriple().isOSBinFormatMachO();
}
static StringRef getCountersSection(const CodeGenModule &CGM) {
return isMachO(CGM) ? "__DATA,__llvm_prf_cnts" : "__llvm_prf_cnts";
}
static StringRef getNameSection(const CodeGenModule &CGM) {
return isMachO(CGM) ? "__DATA,__llvm_prf_names" : "__llvm_prf_names";
}
static StringRef getDataSection(const CodeGenModule &CGM) {
return isMachO(CGM) ? "__DATA,__llvm_prf_data" : "__llvm_prf_data";
}
llvm::GlobalVariable *CodeGenPGO::buildDataVar() {
// Create name variable.
llvm::LLVMContext &Ctx = CGM.getLLVMContext();
auto *VarName = llvm::ConstantDataArray::getString(Ctx, getFuncName(),
false);
auto *Name = new llvm::GlobalVariable(CGM.getModule(), VarName->getType(),
true, VarLinkage, VarName,
getFuncVarName("name"));
Name->setSection(getNameSection(CGM));
Name->setAlignment(1);
// Create data variable.
auto *Int32Ty = llvm::Type::getInt32Ty(Ctx);
auto *Int64Ty = llvm::Type::getInt64Ty(Ctx);
auto *Int8PtrTy = llvm::Type::getInt8PtrTy(Ctx);
auto *Int64PtrTy = llvm::Type::getInt64PtrTy(Ctx);
llvm::GlobalVariable *Data = nullptr;
if (RegionCounters) {
llvm::Type *DataTypes[] = {
Int32Ty, Int32Ty, Int64Ty, Int8PtrTy, Int64PtrTy
};
auto *DataTy = llvm::StructType::get(Ctx, makeArrayRef(DataTypes));
llvm::Constant *DataVals[] = {
llvm::ConstantInt::get(Int32Ty, getFuncName().size()),
llvm::ConstantInt::get(Int32Ty, NumRegionCounters),
llvm::ConstantInt::get(Int64Ty, FunctionHash),
llvm::ConstantExpr::getBitCast(Name, Int8PtrTy),
llvm::ConstantExpr::getBitCast(RegionCounters, Int64PtrTy)
};
Data =
new llvm::GlobalVariable(CGM.getModule(), DataTy, true, VarLinkage,
llvm::ConstantStruct::get(DataTy, DataVals),
getFuncVarName("data"));
// All the data should be packed into an array in its own section.
Data->setSection(getDataSection(CGM));
Data->setAlignment(8);
}
// Create coverage mapping data variable.
if (!CoverageMapping.empty())
CGM.getCoverageMapping()->addFunctionMappingRecord(Name, getFuncName(),
FunctionHash,
CoverageMapping);
// Hide all these symbols so that we correctly get a copy for each
// executable. The profile format expects names and counters to be
// contiguous, so references into shared objects would be invalid.
if (!llvm::GlobalValue::isLocalLinkage(VarLinkage)) {
Name->setVisibility(llvm::GlobalValue::HiddenVisibility);
if (Data) {
Data->setVisibility(llvm::GlobalValue::HiddenVisibility);
RegionCounters->setVisibility(llvm::GlobalValue::HiddenVisibility);
}
}
// Make sure the data doesn't get deleted.
if (Data) CGM.addUsedGlobal(Data);
return Data;
}
void CodeGenPGO::emitInstrumentationData() {
if (!RegionCounters)
return;
// Build the data.
auto *Data = buildDataVar();
// Register the data.
auto *RegisterBB = getOrInsertRegisterBB(CGM);
if (!RegisterBB)
return;
CGBuilderTy Builder(RegisterBB->getTerminator());
auto *VoidPtrTy = llvm::Type::getInt8PtrTy(CGM.getLLVMContext());
Builder.CreateCall(getOrInsertRuntimeRegister(CGM),
Builder.CreateBitCast(Data, VoidPtrTy));
}
llvm::Function *CodeGenPGO::emitInitialization(CodeGenModule &CGM) {
if (!CGM.getCodeGenOpts().ProfileInstrGenerate)
return nullptr;
assert(CGM.getModule().getFunction("__llvm_profile_init") == nullptr &&
"profile initialization already emitted");
// Get the function to call at initialization.
llvm::Constant *RegisterF = getRegisterFunc(CGM);
if (!RegisterF)
return nullptr;
// Create the initialization function.
auto *VoidTy = llvm::Type::getVoidTy(CGM.getLLVMContext());
auto *F = llvm::Function::Create(llvm::FunctionType::get(VoidTy, false),
llvm::GlobalValue::InternalLinkage,
"__llvm_profile_init", &CGM.getModule());
F->setUnnamedAddr(true);
F->addFnAttr(llvm::Attribute::NoInline);
if (CGM.getCodeGenOpts().DisableRedZone)
F->addFnAttr(llvm::Attribute::NoRedZone);
// Add the basic block and the necessary calls.
CGBuilderTy Builder(llvm::BasicBlock::Create(CGM.getLLVMContext(), "", F));
Builder.CreateCall(RegisterF);
Builder.CreateRetVoid();
return F;
// Hide the symbol so that we correctly get a copy for each executable.
if (!llvm::GlobalValue::isLocalLinkage(FuncNameVar->getLinkage()))
FuncNameVar->setVisibility(llvm::GlobalValue::HiddenVisibility);
}
namespace {
@@ -809,35 +653,6 @@ uint64_t PGOHash::finalize() {
return endian::read<uint64_t, little, unaligned>(Result);
}
static void emitRuntimeHook(CodeGenModule &CGM) {
const char *const RuntimeVarName = "__llvm_profile_runtime";
const char *const RuntimeUserName = "__llvm_profile_runtime_user";
if (CGM.getModule().getGlobalVariable(RuntimeVarName))
return;
// Declare the runtime hook.
llvm::LLVMContext &Ctx = CGM.getLLVMContext();
auto *Int32Ty = llvm::Type::getInt32Ty(Ctx);
auto *Var = new llvm::GlobalVariable(CGM.getModule(), Int32Ty, false,
llvm::GlobalValue::ExternalLinkage,
nullptr, RuntimeVarName);
// Make a function that uses it.
auto *User = llvm::Function::Create(llvm::FunctionType::get(Int32Ty, false),
llvm::GlobalValue::LinkOnceODRLinkage,
RuntimeUserName, &CGM.getModule());
User->addFnAttr(llvm::Attribute::NoInline);
if (CGM.getCodeGenOpts().DisableRedZone)
User->addFnAttr(llvm::Attribute::NoRedZone);
CGBuilderTy Builder(llvm::BasicBlock::Create(CGM.getLLVMContext(), "", User));
auto *Load = Builder.CreateLoad(Var);
Builder.CreateRet(Load);
// Create a use of the function. Now the definition of the runtime variable
// should get pulled in, along with any static initializears.
CGM.addUsedGlobal(User);
}
void CodeGenPGO::checkGlobalDecl(GlobalDecl GD) {
// Make sure we only emit coverage mapping for one constructor/destructor.
// Clang emits several functions for the constructor and the destructor of
@@ -861,15 +676,10 @@ void CodeGenPGO::assignRegionCounters(const Decl *D, llvm::Function *Fn) {
return;
CGM.ClearUnusedCoverageMapping(D);
setFuncName(Fn);
setVarLinkage(Fn->getLinkage());
mapRegionCounters(D);
if (InstrumentRegions) {
emitRuntimeHook(CGM);
emitCounterVariables();
if (CGM.getCodeGenOpts().CoverageMapping)
emitCounterRegionMapping(D);
}
if (CGM.getCodeGenOpts().CoverageMapping)
emitCounterRegionMapping(D);
if (PGOReader) {
SourceManager &SM = CGM.getContext().getSourceManager();
loadRegionCounts(PGOReader, SM.isInMainFile(D->getLocation()));
@@ -902,12 +712,19 @@ void CodeGenPGO::emitCounterRegionMapping(const Decl *D) {
if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))
return;
std::string CoverageMapping;
llvm::raw_string_ostream OS(CoverageMapping);
CoverageMappingGen MappingGen(*CGM.getCoverageMapping(),
CGM.getContext().getSourceManager(),
CGM.getLangOpts(), RegionCounterMap.get());
MappingGen.emitCounterMapping(D, OS);
OS.flush();
if (CoverageMapping.empty())
return;
CGM.getCoverageMapping()->addFunctionMappingRecord(
FuncNameVar, FuncName, FunctionHash, CoverageMapping);
}
void
@@ -916,20 +733,25 @@ CodeGenPGO::emitEmptyCounterMapping(const Decl *D, StringRef FuncName,
if (SkipCoverageMapping)
return;
setFuncName(FuncName, Linkage);
setVarLinkage(Linkage);
// Don't map the functions inside the system headers
auto Loc = D->getBody()->getLocStart();
if (CGM.getContext().getSourceManager().isInSystemHeader(Loc))
return;
std::string CoverageMapping;
llvm::raw_string_ostream OS(CoverageMapping);
CoverageMappingGen MappingGen(*CGM.getCoverageMapping(),
CGM.getContext().getSourceManager(),
CGM.getLangOpts());
MappingGen.emitEmptyMapping(D, OS);
OS.flush();
buildDataVar();
if (CoverageMapping.empty())
return;
CGM.getCoverageMapping()->addFunctionMappingRecord(
FuncNameVar, FuncName, FunctionHash, CoverageMapping);
}
void CodeGenPGO::computeRegionCounts(const Decl *D) {
@@ -963,34 +785,23 @@ CodeGenPGO::applyFunctionAttributes(llvm::IndexedInstrProfReader *PGOReader,
Fn->addFnAttr(llvm::Attribute::Cold);
}
void CodeGenPGO::emitCounterVariables() {
llvm::LLVMContext &Ctx = CGM.getLLVMContext();
llvm::ArrayType *CounterTy = llvm::ArrayType::get(llvm::Type::getInt64Ty(Ctx),
NumRegionCounters);
RegionCounters =
new llvm::GlobalVariable(CGM.getModule(), CounterTy, false, VarLinkage,
llvm::Constant::getNullValue(CounterTy),
getFuncVarName("counters"));
RegionCounters->setAlignment(8);
RegionCounters->setSection(getCountersSection(CGM));
}
void CodeGenPGO::emitCounterIncrement(CGBuilderTy &Builder, unsigned Counter) {
if (!RegionCounters)
if (!CGM.getCodeGenOpts().ProfileInstrGenerate || !RegionCounterMap)
return;
llvm::Value *Addr =
Builder.CreateConstInBoundsGEP2_64(RegionCounters, 0, Counter);
llvm::Value *Count = Builder.CreateLoad(Addr, "pgocount");
Count = Builder.CreateAdd(Count, Builder.getInt64(1));
Builder.CreateStore(Count, Addr);
auto *I8PtrTy = llvm::Type::getInt8PtrTy(CGM.getLLVMContext());
Builder.CreateCall4(CGM.getIntrinsic(llvm::Intrinsic::instrprof_increment),
llvm::ConstantExpr::getBitCast(FuncNameVar, I8PtrTy),
Builder.getInt64(FunctionHash),
Builder.getInt32(NumRegionCounters),
Builder.getInt32(Counter));
}
void CodeGenPGO::loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader,
bool IsInMainFile) {
CGM.getPGOStats().addVisited(IsInMainFile);
RegionCounts.clear();
if (std::error_code EC = PGOReader->getFunctionCounts(
getFuncName(), FunctionHash, RegionCounts)) {
if (std::error_code EC =
PGOReader->getFunctionCounts(FuncName, FunctionHash, RegionCounts)) {
if (EC == llvm::instrprof_error::unknown_function)
CGM.getPGOStats().addMissing(IsInMainFile);
else if (EC == llvm::instrprof_error::hash_mismatch)
@@ -1002,13 +813,6 @@ void CodeGenPGO::loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader,
}
}
void CodeGenPGO::destroyRegionCounters() {
RegionCounterMap.reset();
StmtCountMap.reset();
RegionCounts.clear();
RegionCounters = nullptr;
}
/// \brief Calculate what to divide by to scale weights.
///
/// Given the maximum weight, calculate a divisor that will scale all the

24
clang/lib/CodeGen/CodeGenPGO.h
View File

@@ -32,24 +32,21 @@ class CodeGenPGO {
private:
CodeGenModule &CGM;
std::string FuncName;
llvm::GlobalValue::LinkageTypes VarLinkage;
llvm::GlobalVariable *FuncNameVar;
unsigned NumRegionCounters;
uint64_t FunctionHash;
llvm::GlobalVariable *RegionCounters;
std::unique_ptr<llvm::DenseMap<const Stmt *, unsigned>> RegionCounterMap;
std::unique_ptr<llvm::DenseMap<const Stmt *, uint64_t>> StmtCountMap;
std::vector<uint64_t> RegionCounts;
uint64_t CurrentRegionCount;
std::string CoverageMapping;
/// \brief A flag that is set to true when this function doesn't need
/// to have coverage mapping data.
bool SkipCoverageMapping;
public:
CodeGenPGO(CodeGenModule &CGM)
: CGM(CGM), NumRegionCounters(0), FunctionHash(0),
RegionCounters(nullptr), CurrentRegionCount(0),
: CGM(CGM), NumRegionCounters(0), FunctionHash(0), CurrentRegionCount(0),
SkipCoverageMapping(false) {}
/// Whether or not we have PGO region data for the current function. This is
@@ -57,13 +54,6 @@ public:
/// discarded.
bool haveRegionCounts() const { return !RegionCounts.empty(); }
/// Get the string used to identify this function in the profile data.
/// For functions with local linkage, this includes the main file name.
StringRef getFuncName() const { return StringRef(FuncName); }
std::string getFuncVarName(StringRef VarName) const {
return ("__llvm_profile_" + VarName + "_" + FuncName).str();
}
/// Return the counter value of the current region.
uint64_t getCurrentRegionCount() const { return CurrentRegionCount; }
@@ -110,13 +100,6 @@ public:
/// generates global variables or associates PGO data with each of the
/// counters depending on whether we are generating or using instrumentation.
void assignRegionCounters(const Decl *D, llvm::Function *Fn);
/// Emit static data structures for instrumentation data.
void emitInstrumentationData();
/// Clean up region counter state. Must be called if assignRegionCounters is
/// used.
void destroyRegionCounters();
/// Emit static initialization code, if any.
static llvm::Function *emitInitialization(CodeGenModule &CGM);
/// Emit a coverage mapping range with a counter zero
/// for an unused declaration.
void emitEmptyCounterMapping(const Decl *D, StringRef FuncName,
@@ -124,7 +107,7 @@ public:
private:
void setFuncName(llvm::Function *Fn);
void setFuncName(StringRef Name, llvm::GlobalValue::LinkageTypes Linkage);
void setVarLinkage(llvm::GlobalValue::LinkageTypes Linkage);
void createFuncNameVar(llvm::GlobalValue::LinkageTypes Linkage);
void mapRegionCounters(const Decl *D);
void computeRegionCounts(const Decl *D);
void applyFunctionAttributes(llvm::IndexedInstrProfReader *PGOReader,
@@ -132,7 +115,6 @@ private:
void loadRegionCounts(llvm::IndexedInstrProfReader *PGOReader,
bool IsInMainFile);
void emitCounterVariables();
llvm::GlobalVariable *buildDataVar();
void emitCounterRegionMapping(const Decl *D);
/// Emit code to increment the counter at the given index

3
clang/test/Profile/c-linkage-available_externally.c
View File

@@ -2,8 +2,9 @@
// get thrown out.
// RUN: %clang_cc1 -O2 -triple x86_64-apple-macosx10.9 -main-file-name c-linkage-available_externally.c %s -o - -emit-llvm -fprofile-instr-generate | FileCheck %s
// CHECK: @__llvm_profile_counters_foo = linkonce_odr hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name_foo = linkonce_odr hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_counters_foo = linkonce_odr hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_data_foo = linkonce_odr hidden constant { i32, i32, i64, i8*, i64* } { i32 3, i32 1, i64 {{[0-9]+}}, i8* getelementptr inbounds ([3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64]* @__llvm_profile_counters_foo, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
inline int foo(void) { return 1; }

13
clang/test/Profile/c-linkage.c
View File

@@ -1,20 +1,21 @@
// Check the data structures emitted by instrumentation.
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-linkage.c %s -o - -emit-llvm -fprofile-instr-generate | FileCheck %s
// CHECK: @__llvm_profile_runtime = external global i32
// CHECK: @__llvm_profile_counters_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name_foo = hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_name_foo_weak = weak hidden constant [8 x i8] c"foo_weak", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_name_main = hidden constant [4 x i8] c"main", section "__DATA,__llvm_prf_names", align 1
// CHECK: @"__llvm_profile_name_c-linkage.c:foo_internal" = internal constant [24 x i8] c"c-linkage.c:foo_internal", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_counters_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_data_foo = hidden constant { i32, i32, i64, i8*, i64* } { i32 3, i32 1, i64 {{[0-9]+}}, i8* getelementptr inbounds ([3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64]* @__llvm_profile_counters_foo, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
void foo(void) { }
// CHECK: @__llvm_profile_counters_foo_weak = weak hidden global [5 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name_foo_weak = weak hidden constant [8 x i8] c"foo_weak", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_data_foo_weak = weak hidden constant { i32, i32, i64, i8*, i64* } { i32 8, i32 5, i64 {{[0-9]+}}, i8* getelementptr inbounds ([8 x i8]* @__llvm_profile_name_foo_weak, i32 0, i32 0), i64* getelementptr inbounds ([5 x i64]* @__llvm_profile_counters_foo_weak, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
void foo_weak(void) __attribute__((weak));
void foo_weak(void) { if (0){} if (0){} if (0){} if (0){} }
// CHECK: @__llvm_profile_counters_main = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name_main = hidden constant [4 x i8] c"main", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_data_main = hidden constant { i32, i32, i64, i8*, i64* } { i32 4, i32 1, i64 {{[0-9]+}}, i8* getelementptr inbounds ([4 x i8]* @__llvm_profile_name_main, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64]* @__llvm_profile_counters_main, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
static void foo_internal(void);
int main(void) {
@@ -25,11 +26,11 @@ int main(void) {
}
// CHECK: @"__llvm_profile_counters_c-linkage.c:foo_internal" = internal global [3 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @"__llvm_profile_name_c-linkage.c:foo_internal" = internal constant [24 x i8] c"c-linkage.c:foo_internal", section "__DATA,__llvm_prf_names", align 1
// CHECK: @"__llvm_profile_data_c-linkage.c:foo_internal" = internal constant { i32, i32, i64, i8*, i64* } { i32 24, i32 3, i64 {{[0-9]+}}, i8* getelementptr inbounds ([24 x i8]* @"__llvm_profile_name_c-linkage.c:foo_internal", i32 0, i32 0), i64* getelementptr inbounds ([3 x i64]* @"__llvm_profile_counters_c-linkage.c:foo_internal", i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
static void foo_internal(void) { if (0){} if (0){} }
// CHECK: @llvm.used = appending global [5 x i8*] [i8* bitcast (i32 ()* @__llvm_profile_runtime_user to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_foo to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_foo_weak to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_main to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @"__llvm_profile_data_c-linkage.c:foo_internal" to i8*)], section "llvm.metadata"
// CHECK: @__llvm_profile_runtime = external global i32
// CHECK: @llvm.used = appending global [5 x i8*] [i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_foo to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_foo_weak to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_main to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @"__llvm_profile_data_c-linkage.c:foo_internal" to i8*), i8* bitcast (i32 ()* @__llvm_profile_runtime_user to i8*)], section "llvm.metadata"
// CHECK: define linkonce_odr i32 @__llvm_profile_runtime_user() {{.*}} {
// CHECK: %[[REG:.*]] = load i32* @__llvm_profile_runtime

13
clang/test/Profile/cxx-linkage.cpp
View File

@@ -1,19 +1,20 @@
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9.0 -emit-llvm -main-file-name cxx-linkage.cpp %s -o - -fprofile-instr-generate | FileCheck %s
// CHECK: @__llvm_profile_runtime = external global i32
// CHECK: @__llvm_profile_counters__Z3foov = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name__Z3foov = hidden constant [7 x i8] c"_Z3foov", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_name__Z8foo_weakv = weak hidden constant [12 x i8] c"_Z8foo_weakv", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_name_main = hidden constant [4 x i8] c"main", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_name__Z10foo_inlinev = linkonce_odr hidden constant [15 x i8] c"_Z10foo_inlinev", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_counters__Z3foov = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_data__Z3foov = hidden constant { i32, i32, i64, i8*, i64* } { i32 7, i32 1, i64 {{[0-9]+}}, i8* getelementptr inbounds ([7 x i8]* @__llvm_profile_name__Z3foov, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64]* @__llvm_profile_counters__Z3foov, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
void foo(void) { }
// CHECK: @__llvm_profile_counters__Z8foo_weakv = weak hidden global [5 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name__Z8foo_weakv = weak hidden constant [12 x i8] c"_Z8foo_weakv", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_data__Z8foo_weakv = weak hidden constant { i32, i32, i64, i8*, i64* } { i32 12, i32 5, i64 {{[0-9]+}}, i8* getelementptr inbounds ([12 x i8]* @__llvm_profile_name__Z8foo_weakv, i32 0, i32 0), i64* getelementptr inbounds ([5 x i64]* @__llvm_profile_counters__Z8foo_weakv, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
void foo_weak(void) __attribute__((weak));
void foo_weak(void) { if (0){} if (0){} if (0){} if (0){} }
// CHECK: @__llvm_profile_counters_main = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name_main = hidden constant [4 x i8] c"main", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_data_main = hidden constant { i32, i32, i64, i8*, i64* } { i32 4, i32 1, i64 {{[0-9]+}}, i8* getelementptr inbounds ([4 x i8]* @__llvm_profile_name_main, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64]* @__llvm_profile_counters_main, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
inline void foo_inline(void);
int main(void) {
@@ -24,11 +25,11 @@ int main(void) {
}
// CHECK: @__llvm_profile_counters__Z10foo_inlinev = linkonce_odr hidden global [7 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_name__Z10foo_inlinev = linkonce_odr hidden constant [15 x i8] c"_Z10foo_inlinev", section "__DATA,__llvm_prf_names", align 1
// CHECK: @__llvm_profile_data__Z10foo_inlinev = linkonce_odr hidden constant { i32, i32, i64, i8*, i64* } { i32 15, i32 7, i64 {{[0-9]+}}, i8* getelementptr inbounds ([15 x i8]* @__llvm_profile_name__Z10foo_inlinev, i32 0, i32 0), i64* getelementptr inbounds ([7 x i64]* @__llvm_profile_counters__Z10foo_inlinev, i32 0, i32 0) }, section "__DATA,__llvm_prf_data", align 8
inline void foo_inline(void) { if (0){} if (0){} if (0){} if (0){} if (0){} if (0){}}
// CHECK: @llvm.used = appending global [5 x i8*] [i8* bitcast (i32 ()* @__llvm_profile_runtime_user to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data__Z3foov to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data__Z8foo_weakv to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_main to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data__Z10foo_inlinev to i8*)], section "llvm.metadata"
// CHECK: @__llvm_profile_runtime = external global i32
// CHECK: @llvm.used = appending global [5 x i8*] [i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data__Z3foov to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data__Z8foo_weakv to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data_main to i8*), i8* bitcast ({ i32, i32, i64, i8*, i64* }* @__llvm_profile_data__Z10foo_inlinev to i8*), i8* bitcast (i32 ()* @__llvm_profile_runtime_user to i8*)], section "llvm.metadata"
// CHECK: define linkonce_odr i32 @__llvm_profile_runtime_user() {{.*}} {
// CHECK: %[[REG:.*]] = load i32* @__llvm_profile_runtime