Representation of a single sample record. More...

#include "llvm/ProfileData/SampleProf.h"

Classes
struct	CallTargetComparator

Public Types
using	CallTarget = std::pair<FunctionId, uint64_t>
using	SortedCallTargetSet = SmallVector<CallTarget>
using	CallTargetMap = SortedVectorMap<FunctionId, uint64_t, 0>

Public Member Functions
	SampleRecord ()=default
sampleprof_error	addSamples (uint64_t S, uint64_t Weight=1)
	Increment the number of samples for this record by `S`.
uint64_t	removeSamples (uint64_t S)
	Decrease the number of samples for this record by `S`.
sampleprof_error	addCalledTarget (FunctionId F, uint64_t S, uint64_t Weight=1)
	Add called function `F` with samples `S`.
uint64_t	removeCalledTarget (FunctionId F)
	Remove called function from the call target map.
bool	hasCalls () const
	Return true if this sample record contains function calls.
uint64_t	getSamples () const
const CallTargetMap &	getCallTargets () const LLVM_LIFETIME_BOUND
	Return the call targets collected in this sample record.
SortedCallTargetSet	getSortedCallTargets () const
uint64_t	getCallTargetSum () const
LLVM_ABI sampleprof_error	merge (const SampleRecord &Other, uint64_t Weight=1)
	Merge the samples in `Other` into this record.
LLVM_ABI void	print (raw_ostream &OS, unsigned Indent) const
	Print the sample record to the stream `OS` indented by `Indent`.
LLVM_ABI void	dump () const
LLVM_ABI std::error_code	serialize (raw_ostream &OS, const MapVector< FunctionId, uint32_t > &NameTable) const
	Serialize the sample record to the output stream using ULEB128 encoding.
bool	operator== (const SampleRecord &Other) const
bool	operator!= (const SampleRecord &Other) const

Static Public Member Functions
static SortedCallTargetSet	sortCallTargets (const CallTargetMap &Targets)
	Sort call targets in descending order of call frequency.
static const CallTargetMap	adjustCallTargets (const CallTargetMap &Targets, float DistributionFactor)
	Prorate call targets by a distribution factor.

Detailed Description

Representation of a single sample record.

A sample record is represented by a positive integer value, which indicates how frequently was the associated line location executed.

Additionally, if the associated location contains a function call, the record will hold a list of all the possible called targets and the types for virtual table dispatches. For direct calls, this will be the exact function being invoked. For indirect calls (function pointers, virtual table dispatch), this will be a list of one or more functions. For virtual table dispatches, this record will also hold the type of the object.

Definition at line 422 of file SampleProf.h.

Member Typedef Documentation

◆ CallTarget

using llvm::sampleprof::SampleRecord::CallTarget = std::pair<FunctionId, uint64_t>

Definition at line 424 of file SampleProf.h.

◆ CallTargetMap

using llvm::sampleprof::SampleRecord::CallTargetMap = SortedVectorMap<FunctionId, uint64_t, 0>

Definition at line 435 of file SampleProf.h.

◆ SortedCallTargetSet

using llvm::sampleprof::SampleRecord::SortedCallTargetSet = SmallVector<CallTarget>

Definition at line 434 of file SampleProf.h.

Constructor & Destructor Documentation

◆ SampleRecord()

llvm::sampleprof::SampleRecord::SampleRecord ( )

default

Referenced by merge(), operator!=(), and operator==().

Member Function Documentation

◆ addCalledTarget()

sampleprof_error llvm::sampleprof::SampleRecord::addCalledTarget	(	FunctionId	F,
		uint64_t	S,
		uint64_t	Weight = 1 )

inline

Add called function F with samples S.

Optionally scale sample count S by Weight.

Sample counts accumulate using saturating arithmetic, to avoid wrapping around unsigned integers.

Definition at line 464 of file SampleProf.h.

References llvm::counter_overflow, F, llvm::SaturatingMultiplyAdd(), llvm::success, and uint64_t.

Referenced by merge().

◆ addSamples()

sampleprof_error llvm::sampleprof::SampleRecord::addSamples	(	uint64_t	S,
		uint64_t	Weight = 1 )

inline

Increment the number of samples for this record by S.

Optionally scale sample count S by Weight.

Sample counts accumulate using saturating arithmetic, to avoid wrapping around unsigned integers.

Definition at line 443 of file SampleProf.h.

References llvm::counter_overflow, llvm::SaturatingMultiplyAdd(), llvm::success, and uint64_t.

Referenced by merge().

◆ adjustCallTargets()

const CallTargetMap llvm::sampleprof::SampleRecord::adjustCallTargets	(	const CallTargetMap &	Targets,
		float	DistributionFactor )

inlinestatic

Prorate call targets by a distribution factor.

Definition at line 515 of file SampleProf.h.

◆ dump()

LLVM_DUMP_METHOD void SampleRecord::dump ( ) const

Definition at line 193 of file SampleProf.cpp.

References llvm::dbgs(), LLVM_DUMP_METHOD, and print().

◆ getCallTargets()

const CallTargetMap & llvm::sampleprof::SampleRecord::getCallTargets ( ) const

inline

Return the call targets collected in this sample record.

The returned reference may be invalidated by subsequent modifications to this SampleRecord.

Definition at line 493 of file SampleProf.h.

References const, and LLVM_LIFETIME_BOUND.

Referenced by llvm::sampleprof::SampleProfileWriterBinary::addNames(), and serialize().

◆ getCallTargetSum()

uint64_t llvm::sampleprof::SampleRecord::getCallTargetSum ( ) const

inline

Definition at line 500 of file SampleProf.h.

References I, and uint64_t.

◆ getSamples()

uint64_t llvm::sampleprof::SampleRecord::getSamples ( ) const

inline

Definition at line 489 of file SampleProf.h.

References uint64_t.

Referenced by dumpFunctionProfileJson(), and serialize().

◆ getSortedCallTargets()

SortedCallTargetSet llvm::sampleprof::SampleRecord::getSortedCallTargets ( ) const

inline

Definition at line 496 of file SampleProf.h.

References sortCallTargets().

Referenced by dumpFunctionProfileJson(), print(), and serialize().

◆ hasCalls()

bool llvm::sampleprof::SampleRecord::hasCalls ( ) const

inline

Return true if this sample record contains function calls.

Definition at line 487 of file SampleProf.h.

Referenced by print().

◆ merge()

sampleprof_error SampleRecord::merge	(	const SampleRecord &	Other,
		uint64_t	Weight = 1 )

Merge the samples in Other into this record.

Optionally scale sample counts by Weight.

Definition at line 142 of file SampleProf.cpp.

References addCalledTarget(), addSamples(), I, llvm::mergeSampleProfErrors(), llvm::Other, and SampleRecord().

◆ operator!=()

bool llvm::sampleprof::SampleRecord::operator!= ( const SampleRecord & Other ) const

inline

Definition at line 540 of file SampleProf.h.

References llvm::Other, and SampleRecord().

◆ operator==()

bool llvm::sampleprof::SampleRecord::operator== ( const SampleRecord & Other ) const

inline

Definition at line 536 of file SampleProf.h.

References llvm::Other, and SampleRecord().

◆ print()

void SampleRecord::print	(	raw_ostream &	OS,
		unsigned	Indent ) const

Print the sample record to the stream OS indented by Indent.

Definition at line 182 of file SampleProf.cpp.

References getSortedCallTargets(), hasCalls(), and I.

Referenced by dump(), and llvm::sampleprof::operator<<().

◆ removeCalledTarget()

uint64_t llvm::sampleprof::SampleRecord::removeCalledTarget ( FunctionId F )

inline

Remove called function from the call target map.

Return the target sample count of the called function.

Definition at line 476 of file SampleProf.h.

References llvm::Count, F, I, and uint64_t.

◆ removeSamples()

uint64_t llvm::sampleprof::SampleRecord::removeSamples ( uint64_t S )

inline

Decrease the number of samples for this record by S.

Return the amout of samples actually decreased.

Definition at line 452 of file SampleProf.h.

References uint64_t.

◆ serialize()

std::error_code SampleRecord::serialize	(	raw_ostream &	OS,
		const MapVector< FunctionId, uint32_t > &	NameTable ) const

Serialize the sample record to the output stream using ULEB128 encoding.

The NameTable is used to map function names to their IDs.

Definition at line 153 of file SampleProf.cpp.

References llvm::encodeULEB128(), llvm::MapVector< KeyT, ValueT, MapType, VectorType, N >::end(), llvm::MapVector< KeyT, ValueT, MapType, VectorType, N >::find(), getCallTargets(), getSamples(), getSortedCallTargets(), llvm::size(), llvm::success, and llvm::truncated_name_table.

Referenced by llvm::sampleprof::SampleProfileWriterBinary::writeLBRProfile().

◆ sortCallTargets()

SortedCallTargetSet llvm::sampleprof::SampleRecord::sortCallTargets ( const CallTargetMap & Targets )

inlinestatic

Sort call targets in descending order of call frequency.

Definition at line 508 of file SampleProf.h.

References llvm::sort(), and llvm::to_vector_of().

Referenced by getSortedCallTargets(), and GetSortedValueDataFromCallTargets().

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

include/llvm/ProfileData/SampleProf.h
lib/ProfileData/SampleProf.cpp

Classes

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Typedef Documentation

◆ CallTarget

◆ CallTargetMap

◆ SortedCallTargetSet

Constructor & Destructor Documentation

◆ SampleRecord()

Member Function Documentation

◆ addCalledTarget()

◆ addSamples()

◆ adjustCallTargets()

◆ dump()

◆ getCallTargets()

◆ getCallTargetSum()

◆ getSamples()

◆ getSortedCallTargets()

◆ hasCalls()

◆ merge()

◆ operator!=()

◆ operator==()

◆ print()

◆ removeCalledTarget()

◆ removeSamples()

◆ serialize()

◆ sortCallTargets()