clang::CodeGen::CodeGenPGO Class Reference

Per-function PGO state. More...

#include "/opt/doxygen-docs/src/clang/lib/CodeGen/CodeGenPGO.h"

Public Member Functions
	CodeGenPGO (CodeGenModule &CGModule)
bool	haveRegionCounts () const
	Whether or not we have PGO region data for the current function. More...
uint64_t	getCurrentRegionCount () const
	Return the counter value of the current region. More...
void	setCurrentRegionCount (uint64_t Count)
	Set the counter value for the current region. More...
Optional< uint64_t >	getStmtCount (const Stmt *S)
	Check if an execution count is known for a given statement. More...
void	setCurrentStmt (const Stmt *S)
	If the execution count for the current statement is known, record that as the current count. More...
void	assignRegionCounters (GlobalDecl GD, llvm::Function *Fn)
	Assign counters to regions and configure them for PGO of a given function. More...
void	emitEmptyCounterMapping (const Decl *D, StringRef FuncName, llvm::GlobalValue::LinkageTypes Linkage)
	Emit a coverage mapping range with a counter zero for an unused declaration. More...
void	valueProfile (CGBuilderTy &Builder, uint32_t ValueKind, llvm::Instruction *ValueSite, llvm::Value *ValuePtr)
void	emitCounterIncrement (CGBuilderTy &Builder, const Stmt *S, llvm::Value *StepV)
uint64_t	getRegionCount (const Stmt *S)
	Return the region count for the counter at the given index. More...

Detailed Description

Per-function PGO state.

Definition at line 27 of file CodeGenPGO.h.

Constructor & Destructor Documentation

CodeGenPGO()

clang::CodeGen::CodeGenPGO::CodeGenPGO ( CodeGenModule &  CGModule )

inline

Definition at line 43 of file CodeGenPGO.h.

Member Function Documentation

assignRegionCounters()

void CodeGenPGO::assignRegionCounters	(	GlobalDecl	GD,
		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 771 of file CodeGenPGO.cpp.

References clang::Ctor_Base, clang::Dtor_Base, clang::CodeGen::CoverageMappingGen::emitCounterMapping(), clang::Stmt::getBeginLoc(), clang::Decl::getBody(), clang::GlobalDecl::getCtorType(), clang::GlobalDecl::getDecl(), clang::GlobalDecl::getDtorType(), clang::Decl::getLocation(), clang::Decl::hasBody(), clang::CodeGen::CodeGenFunction::IsConstructorDelegationValid(), clang::Decl::isImplicit(), clang::SourceManager::isInMainFile(), PGO_HASH_LATEST, and SM.

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

emitCounterIncrement()

void CodeGenPGO::emitCounterIncrement	(	CGBuilderTy &	Builder,
		const Stmt *	S,
		llvm::Value *	StepV
	)

Definition at line 904 of file CodeGenPGO.cpp.

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

emitEmptyCounterMapping()

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 860 of file CodeGenPGO.cpp.

References clang::CodeGen::CoverageMappingGen::emitEmptyMapping(), getRegionCount(), and haveRegionCounts().

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

getCurrentRegionCount()

uint64_t clang::CodeGen::CodeGenPGO::getCurrentRegionCount ( ) const

inline

Return the counter value of the current region.

Definition at line 53 of file CodeGenPGO.h.

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

getRegionCount()

uint64_t clang::CodeGen::CodeGenPGO::getRegionCount ( const Stmt *  S )

inline

Return the region count for the counter at the given index.

Definition at line 107 of file CodeGenPGO.h.

References haveRegionCounts().

Referenced by emitEmptyCounterMapping().

getStmtCount()

Optional<uint64_t> clang::CodeGen::CodeGenPGO::getStmtCount ( const Stmt *  S )

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 62 of file CodeGenPGO.h.

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

haveRegionCounts()

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 50 of file CodeGenPGO.h.

Referenced by emitEmptyCounterMapping(), and getRegionCount().

setCurrentRegionCount()

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 58 of file CodeGenPGO.h.

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

setCurrentStmt()

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 73 of file CodeGenPGO.h.

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

valueProfile()

void CodeGenPGO::valueProfile	(	CGBuilderTy &	Builder,
		uint32_t	ValueKind,
		llvm::Instruction *	ValueSite,
		llvm::Value *	ValuePtr
	)

Definition at line 929 of file CodeGenPGO.cpp.

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

• lib/CodeGen/CodeGenPGO.h
• lib/CodeGen/CodeGenPGO.cpp