llvm::sampleprof::SampleRecord Class Reference

Representation of a single sample record. More...

#include "llvm/ProfileData/SampleProf.h"

Classes
struct	CallTargetComparator

Public Types
using	CallTarget = std::pair< StringRef, uint64_t >
using	SortedCallTargetSet = std::set< CallTarget, CallTargetComparator >
using	CallTargetMap = StringMap< uint64_t >

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. More...
uint64_t	removeSamples (uint64_t S)
	Decrease the number of samples for this record by S. More...
sampleprof_error	addCalledTarget (StringRef F, uint64_t S, uint64_t Weight=1)
	Add called function F with samples S. More...
uint64_t	removeCalledTarget (StringRef F)
	Remove called function from the call target map. More...
bool	hasCalls () const
	Return true if this sample record contains function calls. More...
uint64_t	getSamples () const
const CallTargetMap &	getCallTargets () const
const SortedCallTargetSet	getSortedCallTargets () const
uint64_t	getCallTargetSum () const
sampleprof_error	merge (const SampleRecord &Other, uint64_t Weight=1)
	Merge the samples in Other into this record. More...
void	print (raw_ostream &OS, unsigned Indent) const
	Print the sample record to the stream OS indented by Indent. More...
void	dump () const

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

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. 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.

Definition at line 317 of file SampleProf.h.

Member Typedef Documentation

CallTarget

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

Definition at line 319 of file SampleProf.h.

CallTargetMap

using llvm::sampleprof::SampleRecord::CallTargetMap = StringMap<uint64_t>

Definition at line 330 of file SampleProf.h.

SortedCallTargetSet

using llvm::sampleprof::SampleRecord::SortedCallTargetSet = std::set<CallTarget, CallTargetComparator>

Definition at line 329 of file SampleProf.h.

Constructor & Destructor Documentation

SampleRecord()

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

default

Member Function Documentation

addCalledTarget()

sampleprof_error llvm::sampleprof::SampleRecord::addCalledTarget ( StringRef  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 359 of file SampleProf.h.

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

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 338 of file SampleProf.h.

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

Referenced by merge().

adjustCallTargets()

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

inlinestatic

Prorate call targets by a distribution factor.

Definition at line 407 of file SampleProf.h.

References I.

dump()

LLVM_DUMP_METHOD void SampleRecord::dump

(

)

const

Definition at line 147 of file SampleProf.cpp.

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

getCallTargets()

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

inline

Definition at line 385 of file SampleProf.h.

getCallTargetSum()

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

inline

Definition at line 390 of file SampleProf.h.

References I.

getSamples()

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

inline

Definition at line 384 of file SampleProf.h.

getSortedCallTargets()

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

inline

Definition at line 386 of file SampleProf.h.

References SortCallTargets().

Referenced by print().

hasCalls()

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

inline

Return true if this sample record contains function calls.

Definition at line 382 of file SampleProf.h.

References llvm::StringMapImpl::empty().

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 121 of file SampleProf.cpp.

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

print()

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

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

Definition at line 136 of file SampleProf.cpp.

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

Referenced by dump().

removeCalledTarget()

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

inline

Remove called function from the call target map.

Return the target sample count of the called function.

Definition at line 371 of file SampleProf.h.

References llvm::StringMap< ValueTy, AllocatorTy >::end(), llvm::StringMap< ValueTy, AllocatorTy >::erase(), F, llvm::StringMap< ValueTy, AllocatorTy >::find(), and I.

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 347 of file SampleProf.h.

References S.

SortCallTargets()

static const SortedCallTargetSet llvm::sampleprof::SampleRecord::SortCallTargets ( const CallTargetMap &  Targets )

inlinestatic

Sort call targets in descending order of call frequency.

Definition at line 398 of file SampleProf.h.

References I.

Referenced by getSortedCallTargets(), and GetSortedValueDataFromCallTargets().

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

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