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:

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 69 of file RegisterFile.cpp.

Member Function Documentation

◆ addRegisterRead()

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

◆ addRegisterWrite()

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

Definition at line 233 of file RegisterFile.cpp.

References llvm::mca::WriteState::addUser(), assert(), llvm::mca::WriteState::clearsSuperRegisters(), llvm::dbgs(), llvm::mca::WriteState::getLatency(), llvm::mca::WriteState::getRegisterID(), llvm::mca::WriteRef::getSourceIndex(), llvm::mca::WriteRef::getWriteState(), I, llvm::mca::WriteState::isEliminated(), llvm::mca::isNonArtificial(), llvm::mca::WriteState::isWriteZero(), LLVM_DEBUG, llvm::make_filter_range(), llvm::mca::WriteState::setPRF(), and llvm::Write.

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

◆ canEliminateMove()

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

Definition at line 391 of file RegisterFile.cpp.

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

Referenced by tryEliminateMoveOrSwap().

◆ checkRAWHazards()

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

Definition at line 576 of file RegisterFile.cpp.

References assert(), llvm::SmallVectorImpl< T >::clear(), 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::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 510 of file RegisterFile.cpp.

References assert(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::dbgs(), llvm::mca::ReadState::getDescriptor(), getElapsedCyclesFromWriteBack(), llvm::MCSubtargetInfo::getReadAdvanceCycles(), llvm::mca::ReadState::getRegisterID(), llvm::mca::WriteState::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::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorImpl< T >::resize(), llvm::mca::ReadDescriptor::SchedClassID, llvm::SmallVectorTemplateCommon< T, typename >::size(), 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.

◆ cycleStart()

void llvm::mca::RegisterFile::cycleStart ( )

Definition at line 105 of file RegisterFile.cpp.

◆ dump()

void llvm::mca::RegisterFile::dump ( ) const

Definition at line 725 of file RegisterFile.cpp.

References llvm::dbgs(), E(), getNumRegisterFiles(), and I.

◆ getElapsedCyclesFromWriteBack()

unsigned llvm::mca::RegisterFile::getElapsedCyclesFromWriteBack ( const WriteRef & WR ) const

Definition at line 505 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 dump(), and isAvailable().

◆ isAvailable()

unsigned llvm::mca::RegisterFile::isAvailable ( ArrayRef< MCPhysReg > Regs ) const

Definition at line 668 of file RegisterFile.cpp.

References llvm::dbgs(), E(), getNumRegisterFiles(), I, and LLVM_DEBUG.

◆ onInstructionExecuted()

void llvm::mca::RegisterFile::onInstructionExecuted ( Instruction * IS )

Definition at line 110 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.

◆ removeRegisterWrite()

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

Definition at line 339 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.

◆ tryEliminateMoveOrSwap()

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

Definition at line 433 of file RegisterFile.cpp.

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

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

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

Classes

Public Member Functions