llvm::mca::RegisterFile Class Reference

Manages hardware register files, and tracks register definitions for register renaming purposes. More...

#include "llvm/MCA/HardwareUnits/RegisterFile.h"

Inheritance diagram for llvm::mca::RegisterFile:

Collaboration diagram for llvm::mca::RegisterFile:

Classes
struct	RAWHazard

Public Member Functions
	RegisterFile (const MCSchedModel &SM, const MCRegisterInfo &mri, unsigned NumRegs=0)
void	collectWrites (const MCSubtargetInfo &STI, const ReadState &RS, SmallVectorImpl< WriteRef > &Writes, SmallVectorImpl< WriteRef > &CommittedWrites) const
RAWHazard	checkRAWHazards (const MCSubtargetInfo &STI, const ReadState &RS) const
void	addRegisterWrite (WriteRef Write, MutableArrayRef< unsigned > UsedPhysRegs)
void	addRegisterRead (ReadState &RS, const MCSubtargetInfo &STI) const
void	removeRegisterWrite (const WriteState &WS, MutableArrayRef< unsigned > FreedPhysRegs)
bool	canEliminateMove (const WriteState &WS, const ReadState &RS, unsigned PRFIndex) const
bool	tryEliminateMoveOrSwap (MutableArrayRef< WriteState > Writes, MutableArrayRef< ReadState > Reads)
unsigned	isAvailable (ArrayRef< MCPhysReg > Regs) const
unsigned	getNumRegisterFiles () const
unsigned	getElapsedCyclesFromWriteBack (const WriteRef &WR) const
void	onInstructionExecuted (Instruction *IS)
void	cycleStart ()
void	cycleEnd ()
void	dump () const
Public Member Functions inherited from llvm::mca::HardwareUnit
	HardwareUnit ()=default
virtual	~HardwareUnit ()

Detailed Description

Manages hardware register files, and tracks register definitions for register renaming purposes.

Definition at line 83 of file RegisterFile.h.

Constructor & Destructor Documentation

RegisterFile()

llvm::mca::RegisterFile::RegisterFile	(	const MCSchedModel &	SM,
		const MCRegisterInfo &	mri,
		unsigned	NumRegs = 0
	)

Definition at line 64 of file RegisterFile.cpp.

Member Function Documentation

addRegisterRead()

void llvm::mca::RegisterFile::addRegisterRead	(	ReadState &	RS,
		const MCSubtargetInfo &	STI
	)		const

Definition at line 618 of file RegisterFile.cpp.

References llvm::mca::WriteState::addUser(), assert(), collectWrites(), llvm::mca::ReadState::getDescriptor(), getElapsedCyclesFromWriteBack(), llvm::MCSubtargetInfo::getReadAdvanceCycles(), llvm::mca::ReadState::getRegisterID(), llvm::MCSchedModel::getSchedClassDesc(), llvm::MCSubtargetInfo::getSchedModel(), llvm::mca::ReadState::isIndependentFromDef(), llvm::PPCISD::SC, llvm::mca::ReadDescriptor::SchedClassID, llvm::mca::ReadState::setDependentWrites(), llvm::mca::ReadState::setPRF(), llvm::mca::ReadState::setReadZero(), llvm::mca::ReadDescriptor::UseIndex, and llvm::mca::ReadState::writeStartEvent().

Referenced by llvm::mca::addRegisterReadWrite().

addRegisterWrite()

void llvm::mca::RegisterFile::addRegisterWrite	(	WriteRef	Write,
		MutableArrayRef< unsigned >	UsedPhysRegs
	)

Definition at line 228 of file RegisterFile.cpp.

References llvm::mca::WriteState::addUser(), assert(), llvm::mca::WriteState::clearsSuperRegisters(), llvm::dbgs(), llvm::mca::WriteState::getLatency(), llvm::MCRegisterInfo::getName(), llvm::mca::WriteState::getRegisterID(), llvm::mca::WriteRef::getSourceIndex(), llvm::mca::WriteRef::getWriteState(), I, llvm::mca::WriteState::isEliminated(), llvm::mca::WriteState::isWriteZero(), LLVM_DEBUG, llvm::APInt::setBitVal(), and llvm::mca::WriteState::setPRF().

Referenced by llvm::mca::addRegisterReadWrite().

canEliminateMove()

bool llvm::mca::RegisterFile::canEliminateMove	(	const WriteState &	WS,
		const ReadState &	RS,
		unsigned	PRFIndex
	)		const

Definition at line 384 of file RegisterFile.cpp.

References llvm::mca::WriteState::clearsSuperRegisters(), llvm::mca::WriteState::getRegisterID(), and llvm::mca::ReadState::getRegisterID().

Referenced by tryEliminateMoveOrSwap().

checkRAWHazards()

RegisterFile::RAWHazard llvm::mca::RegisterFile::checkRAWHazards	(	const MCSubtargetInfo &	STI,
		const ReadState &	RS
	)		const

Definition at line 568 of file RegisterFile.cpp.

References assert(), collectWrites(), llvm::mca::RegisterFile::RAWHazard::CyclesLeft, llvm::mca::WriteState::getCyclesLeft(), llvm::mca::ReadState::getDescriptor(), getElapsedCyclesFromWriteBack(), llvm::MCSubtargetInfo::getReadAdvanceCycles(), llvm::MCSchedModel::getSchedClassDesc(), llvm::MCSubtargetInfo::getSchedModel(), llvm::mca::WriteState::getWriteResourceID(), llvm::mca::RegisterFile::RAWHazard::isValid(), llvm::mca::RegisterFile::RAWHazard::RegisterID, llvm::PPCISD::SC, llvm::mca::ReadDescriptor::SchedClassID, llvm::mca::UNKNOWN_CYCLES, and llvm::mca::ReadDescriptor::UseIndex.

Referenced by llvm::mca::checkRegisterHazard().

collectWrites()

void llvm::mca::RegisterFile::collectWrites	(	const MCSubtargetInfo &	STI,
		const ReadState &	RS,
		SmallVectorImpl< WriteRef > &	Writes,
		SmallVectorImpl< WriteRef > &	CommittedWrites
	)		const

Definition at line 502 of file RegisterFile.cpp.

References assert(), llvm::dbgs(), llvm::mca::ReadState::getDescriptor(), getElapsedCyclesFromWriteBack(), llvm::MCRegisterInfo::getName(), llvm::MCSubtargetInfo::getReadAdvanceCycles(), llvm::mca::WriteState::getRegisterID(), llvm::mca::ReadState::getRegisterID(), llvm::MCSchedModel::getSchedClassDesc(), llvm::MCSubtargetInfo::getSchedModel(), llvm::mca::WriteRef::getSourceIndex(), llvm::mca::WriteRef::getWriteResourceID(), llvm::mca::WriteRef::getWriteState(), llvm::mca::WriteRef::hasKnownWriteBackCycle(), I, LLVM_DEBUG, llvm::SmallVectorImpl< T >::resize(), llvm::PPCISD::SC, llvm::mca::ReadDescriptor::SchedClassID, llvm::sort(), llvm::unique(), and llvm::mca::ReadDescriptor::UseIndex.

Referenced by addRegisterRead(), and checkRAWHazards().

cycleEnd()

void llvm::mca::RegisterFile::cycleEnd ( )

inline

Definition at line 302 of file RegisterFile.h.

Referenced by llvm::mca::RetireStage::cycleEnd(), and llvm::mca::InOrderIssueStage::cycleEnd().

cycleStart()

void llvm::mca::RegisterFile::cycleStart

(

)

Definition at line 100 of file RegisterFile.cpp.

Referenced by llvm::mca::RetireStage::cycleStart(), and llvm::mca::InOrderIssueStage::cycleStart().

dump()

void llvm::mca::RegisterFile::dump

(

)

const

Definition at line 717 of file RegisterFile.cpp.

References llvm::dbgs(), E, llvm::MCRegisterInfo::getName(), getNumRegisterFiles(), llvm::MCRegisterInfo::getNumRegs(), I, and llvm::AArch64::RM.

Referenced by llvm::mca::DispatchStage::dump().

getElapsedCyclesFromWriteBack()

unsigned llvm::mca::RegisterFile::getElapsedCyclesFromWriteBack

(

const WriteRef &

WR

)

const

Definition at line 497 of file RegisterFile.cpp.

References assert(), llvm::mca::WriteRef::getWriteBackCycle(), and llvm::mca::WriteRef::hasKnownWriteBackCycle().

Referenced by addRegisterRead(), checkRAWHazards(), and collectWrites().

getNumRegisterFiles()

unsigned llvm::mca::RegisterFile::getNumRegisterFiles ( ) const

inline

Definition at line 293 of file RegisterFile.h.

Referenced by llvm::mca::DispatchStage::cycleStart(), dump(), isAvailable(), and llvm::mca::RetireStage::notifyInstructionRetired().

isAvailable()

unsigned llvm::mca::RegisterFile::isAvailable

(

ArrayRef< MCPhysReg >

Regs

)

const

Definition at line 660 of file RegisterFile.cpp.

References getNumRegisterFiles().

onInstructionExecuted()

void llvm::mca::RegisterFile::onInstructionExecuted

(

Instruction *

IS

)

Definition at line 105 of file RegisterFile.cpp.

References assert(), llvm::mca::InstructionBase::getDefs(), llvm::mca::WriteRef::getWriteState(), I, llvm::mca::Instruction::isExecuted(), llvm::mca::WriteRef::notifyExecuted(), and llvm::mca::UNKNOWN_CYCLES.

Referenced by llvm::mca::RetireStage::execute().

removeRegisterWrite()

void llvm::mca::RegisterFile::removeRegisterWrite	(	const WriteState &	WS,
		MutableArrayRef< unsigned >	FreedPhysRegs
	)

Definition at line 332 of file RegisterFile.cpp.

References assert(), llvm::mca::WriteState::clearsSuperRegisters(), llvm::mca::WriteRef::commit(), llvm::mca::WriteState::getCyclesLeft(), llvm::mca::WriteState::getRegisterID(), llvm::mca::WriteRef::getWriteState(), I, llvm::mca::WriteState::isEliminated(), llvm::mca::WriteState::isWriteZero(), and llvm::mca::UNKNOWN_CYCLES.

Referenced by llvm::mca::RetireStage::notifyInstructionRetired().

tryEliminateMoveOrSwap()

bool llvm::mca::RegisterFile::tryEliminateMoveOrSwap	(	MutableArrayRef< WriteState >	Writes,
		MutableArrayRef< ReadState >	Reads
	)

Definition at line 426 of file RegisterFile.cpp.

References canEliminateMove(), E, llvm::ArrayRef< T >::empty(), llvm::mca::WriteState::getRegisterID(), llvm::mca::ReadState::getRegisterID(), I, if(), llvm::mca::WriteState::setEliminated(), llvm::mca::ReadState::setReadZero(), llvm::mca::WriteState::setWriteZero(), and llvm::ArrayRef< T >::size().

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

• include/llvm/MCA/HardwareUnits/RegisterFile.h
• lib/MCA/HardwareUnits/RegisterFile.cpp