#include <CodeGenPGO.h>

Public Member Functions
	CodeGenPGO (CodeGenModule &CGM)
bool	haveRegionCounts () const
StringRef	getFuncName () const
std::string	getFuncVarName (StringRef VarName) const
uint64_t	getCurrentRegionCount () const
	Return the counter value of the current region.
void	setCurrentRegionCount (uint64_t Count)
void	setCurrentRegionUnreachable ()
bool	getStmtCount (const Stmt *S, uint64_t &Count)
void	setCurrentStmt (const Stmt *S)
llvm::MDNode *	createBranchWeights (uint64_t TrueCount, uint64_t FalseCount)
	Calculate branch weights appropriate for PGO data.
llvm::MDNode *	createBranchWeights (ArrayRef< uint64_t > Weights)
llvm::MDNode *	createLoopWeights (const Stmt *Cond, RegionCounter &Cnt)
void	checkGlobalDecl (GlobalDecl GD)
	Check if we need to emit coverage mapping for a given declaration.
void	assignRegionCounters (const Decl D, llvm::Function Fn)
void	emitInstrumentationData ()
	Emit static data structures for instrumentation data.
void	destroyRegionCounters ()
void	emitEmptyCounterMapping (const Decl *D, StringRef FuncName, llvm::GlobalValue::LinkageTypes Linkage)
Static Public Member Functions
static llvm::Function *	emitInitialization (CodeGenModule &CGM)
	Emit static initialization code, if any.
Friends
class	RegionCounter

Detailed Description

Per-function PGO state. This class should generally not be used directly, but instead through the CodeGenFunction and RegionCounter types.

Definition at line 31 of file CodeGenPGO.h.

Constructor & Destructor Documentation

clang::CodeGen::CodeGenPGO::CodeGenPGO ( CodeGenModule & CGM ) [inline]

Definition at line 51 of file CodeGenPGO.h.

Member Function Documentation

void CodeGenPGO::assignRegionCounters	(	const Decl *	D,
		llvm::Function *	Fn
	)

Assign counters to regions and configure them for PGO of a given function. Does nothing if instrumentation is not enabled and either generates global variables or associates PGO data with each of the counters depending on whether we are generating or using instrumentation.

Definition at line 858 of file CodeGenPGO.cpp.

References clang::CodeGen::CodeGenModule::ClearUnusedCoverageMapping(), emitRuntimeHook(), clang::CodeGen::CodeGenModule::getCodeGenOpts(), clang::CodeGen::CodeGenModule::getContext(), clang::Decl::getLocation(), clang::CodeGen::CodeGenModule::getPGOReader(), clang::ASTContext::getSourceManager(), clang::Decl::isImplicit(), clang::SourceManager::isInMainFile(), and SM.

Referenced by clang::CodeGen::CodeGenFunction::GenerateCapturedStmtFunction(), clang::CodeGen::CodeGenFunction::GenerateCode(), and clang::CodeGen::CodeGenFunction::GenerateObjCMethod().

void CodeGenPGO::checkGlobalDecl ( GlobalDecl GD )

Check if we need to emit coverage mapping for a given declaration.

Definition at line 844 of file CodeGenPGO.cpp.

References clang::Ctor_Base, clang::Dtor_Base, clang::GlobalDecl::getCtorType(), clang::GlobalDecl::getDecl(), and clang::GlobalDecl::getDtorType().

Referenced by clang::CodeGen::CodeGenFunction::GenerateCode().

llvm::MDNode * CodeGenPGO::createBranchWeights	(	uint64_t	TrueCount,
		uint64_t	FalseCount
	)

Calculate branch weights appropriate for PGO data.

Definition at line 1039 of file CodeGenPGO.cpp.

References calculateWeightScale(), clang::CodeGen::CodeGenModule::getLLVMContext(), and scaleBranchWeight().

Referenced by createLoopWeights(), clang::CodeGen::CodeGenFunction::EmitBranchOnBoolExpr(), clang::CodeGen::CodeGenFunction::EmitCaseStmtRange(), clang::CodeGen::CodeGenFunction::EmitObjCForCollectionStmt(), and clang::CodeGen::CodeGenFunction::EmitSwitchStmt().

llvm::MDNode * CodeGenPGO::createBranchWeights ( ArrayRef< uint64_t > Weights )

Definition at line 1053 of file CodeGenPGO.cpp.

References calculateWeightScale(), clang::CodeGen::CodeGenModule::getLLVMContext(), and scaleBranchWeight().

llvm::MDNode * CodeGenPGO::createLoopWeights	(	const Stmt *	Cond,
		RegionCounter &	Cnt
	)

Definition at line 1075 of file CodeGenPGO.cpp.

References createBranchWeights(), clang::CodeGen::RegionCounter::getCount(), getStmtCount(), and haveRegionCounts().

Referenced by clang::CodeGen::CodeGenFunction::EmitCXXForRangeStmt(), clang::CodeGen::CodeGenFunction::EmitDoStmt(), clang::CodeGen::CodeGenFunction::EmitForStmt(), clang::CodeGen::CodeGenFunction::EmitOMPInnerLoop(), and clang::CodeGen::CodeGenFunction::EmitWhileStmt().

void CodeGenPGO::destroyRegionCounters ( )

Clean up region counter state. Must be called if assignRegionCounters is used.

Definition at line 1008 of file CodeGenPGO.cpp.

Referenced by clang::CodeGen::CodeGenFunction::GenerateCapturedStmtFunction(), clang::CodeGen::CodeGenFunction::GenerateCode(), and clang::CodeGen::CodeGenFunction::GenerateObjCMethod().

void CodeGenPGO::emitEmptyCounterMapping	(	const Decl *	D,
		StringRef	FuncName,
		llvm::GlobalValue::LinkageTypes	Linkage
	)

Emit a coverage mapping range with a counter zero for an unused declaration.

Definition at line 917 of file CodeGenPGO.cpp.

References clang::CodeGen::CoverageMappingGen::emitEmptyMapping(), clang::Decl::getBody(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getCoverageMapping(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::Stmt::getLocStart(), clang::ASTContext::getSourceManager(), and clang::SourceManager::isInSystemHeader().

Referenced by clang::CodeGen::CodeGenModule::EmitDeferredUnusedCoverageMappings().

llvm::Function * CodeGenPGO::emitInitialization ( CodeGenModule & CGM ) [static]

Emit static initialization code, if any.

Definition at line 208 of file CodeGenPGO.cpp.

References Builder, clang::CodeGen::CodeGenModule::getCodeGenOpts(), clang::CodeGen::CodeGenModule::getLLVMContext(), clang::CodeGen::CodeGenModule::getModule(), getRegisterFunc(), and clang::InternalLinkage.

Referenced by clang::CodeGen::CodeGenModule::Release().

void CodeGenPGO::emitInstrumentationData ( )

Emit static data structures for instrumentation data.

Definition at line 191 of file CodeGenPGO.cpp.

References Builder, clang::CodeGen::CodeGenModule::getLLVMContext(), getOrInsertRegisterBB(), and getOrInsertRuntimeRegister().

Referenced by clang::CodeGen::CodeGenFunction::GenerateCapturedStmtFunction(), clang::CodeGen::CodeGenFunction::GenerateCode(), and clang::CodeGen::CodeGenFunction::GenerateObjCMethod().

uint64_t clang::CodeGen::CodeGenPGO::getCurrentRegionCount ( ) const [inline]

Return the counter value of the current region.

Definition at line 69 of file CodeGenPGO.h.

Referenced by clang::CodeGen::RegionCounter::adjustForControlFlow(), clang::CodeGen::RegionCounter::beginRegion(), clang::CodeGen::CodeGenFunction::EmitBranchOnBoolExpr(), and clang::CodeGen::CodeGenFunction::EmitObjCForCollectionStmt().

StringRef clang::CodeGen::CodeGenPGO::getFuncName ( ) const [inline]

Get the string used to identify this function in the profile data. For functions with local linkage, this includes the main file name.

Definition at line 63 of file CodeGenPGO.h.

std::string clang::CodeGen::CodeGenPGO::getFuncVarName ( StringRef VarName ) const [inline]

Definition at line 64 of file CodeGenPGO.h.

bool clang::CodeGen::CodeGenPGO::getStmtCount	(	const Stmt *	S,
		uint64_t &	Count
	)		`[inline]`

Check if an execution count is known for a given statement. If so, return true and put the value in Count; else return false.

Definition at line 83 of file CodeGenPGO.h.

Referenced by createLoopWeights(), and setCurrentStmt().

bool clang::CodeGen::CodeGenPGO::haveRegionCounts ( ) const [inline]

Whether or not we have PGO region data for the current function. This is false both when we have no data at all and when our data has been discarded.

Definition at line 59 of file CodeGenPGO.h.

Referenced by createLoopWeights(), and clang::CodeGen::CodeGenFunction::EmitSwitchStmt().

void clang::CodeGen::CodeGenPGO::setCurrentRegionCount ( uint64_t Count ) [inline]

Set the counter value for the current region. This is used to keep track of changes to the most recent counter from control flow and non-local exits.

Definition at line 74 of file CodeGenPGO.h.

References clang::LangAS::Count.

Referenced by clang::CodeGen::RegionCounter::applyAdjustmentsToRegion(), clang::CodeGen::RegionCounter::beginElseRegion(), clang::CodeGen::RegionCounter::beginRegion(), clang::CodeGen::RegionCounter::setCurrentRegionCount(), setCurrentRegionUnreachable(), and setCurrentStmt().

void clang::CodeGen::CodeGenPGO::setCurrentRegionUnreachable ( ) [inline]

Indicate that the current region is never reached, and thus should have a counter value of zero. This is important so that subsequent regions can correctly track their parent counts.

Definition at line 79 of file CodeGenPGO.h.

References setCurrentRegionCount().

void clang::CodeGen::CodeGenPGO::setCurrentStmt ( const Stmt * S ) [inline]

If the execution count for the current statement is known, record that as the current count.

Definition at line 96 of file CodeGenPGO.h.

References clang::LangAS::Count, getStmtCount(), and setCurrentRegionCount().

Referenced by clang::CodeGen::CodeGenFunction::EmitStmt(), and clang::CodeGen::CodeGenFunction::EvaluateExprAsBool().

Friends And Related Function Documentation

friend class RegionCounter [friend]

Definition at line 157 of file CodeGenPGO.h.

The documentation for this class was generated from the following files:

Public Member Functions

Static Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation