MachineFunctionSplitter.cpp File Reference

#include "llvm/ADT/SmallVector.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/CodeGen/BasicBlockSectionUtils.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Function.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/CommandLine.h"

Include dependency graph for MachineFunctionSplitter.cpp:

Go to the source code of this file.

Functions
static bool	isColdBlock (const MachineBasicBlock &MBB, const MachineBlockFrequencyInfo *MBFI, ProfileSummaryInfo *PSI)
	INITIALIZE_PASS (MachineFunctionSplitter, "machine-function-splitter", "Split machine functions using profile information", false, false) MachineFunctionPass *llvm

Variables
static cl::opt< unsigned >	PercentileCutoff ("mfs-psi-cutoff", cl::desc("Percentile profile summary cutoff used to " "determine cold blocks. Unused if set to zero."), cl::init(999950), cl::Hidden)
static cl::opt< unsigned >	ColdCountThreshold ("mfs-count-threshold", cl::desc("Minimum number of times a block must be executed to be retained."), cl::init(1), cl::Hidden)

Function Documentation

INITIALIZE_PASS()

INITIALIZE_PASS	(	MachineFunctionSplitter	,
		"machine-function-splitter"	,
		"Split machine functions using profile information"	,
		false	,
		false
	)

Definition at line 161 of file MachineFunctionSplitter.cpp.

isColdBlock()

static bool isColdBlock ( const MachineBasicBlock &  MBB, const MachineBlockFrequencyInfo *  MBFI, ProfileSummaryInfo *  PSI  )

static

Definition at line 79 of file MachineFunctionSplitter.cpp.

References ColdCountThreshold, llvm::MachineBlockFrequencyInfo::getBlockProfileCount(), llvm::Optional< T >::hasValue(), llvm::ProfileSummaryInfo::isColdCountNthPercentile(), MBB, and PercentileCutoff.

Referenced by llvm::shouldOptimizeForSizeImpl().

Variable Documentation

ColdCountThreshold

cl::opt<unsigned> ColdCountThreshold("mfs-count-threshold", cl::desc( "Minimum number of times a block must be executed to be retained."), cl::init(1), cl::Hidden)

static

Referenced by annotateAllFunctions(), llvm::ProfileSummaryBuilder::getColdCountThreshold(), isColdBlock(), llvm::sampleprof::SampleContextTrimmer::trimAndMergeColdContextProfiles(), and verifyFuncBFI().

PercentileCutoff

cl::opt<unsigned> PercentileCutoff("mfs-psi-cutoff", cl::desc("Percentile profile summary cutoff used to " "determine cold blocks. Unused if set to zero."), cl::init(999950), cl::Hidden)

static

Referenced by isColdBlock(), llvm::ProfileSummaryInfo::isColdBlockNthPercentile(), llvm::ProfileSummaryInfo::isColdCountNthPercentile(), llvm::ProfileSummaryInfo::isFunctionColdInCallGraphNthPercentile(), llvm::ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile(), llvm::ProfileSummaryInfo::isHotBlockNthPercentile(), and llvm::ProfileSummaryInfo::isHotCountNthPercentile().