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:

Public Member Functions
	RegisterFile (const MCSchedModel &SM, const MCRegisterInfo &mri, unsigned NumRegs=0)
void	addRegisterWrite (WriteRef Write, MutableArrayRef< unsigned > UsedPhysRegs)
void	addRegisterRead (ReadState &RS, SmallVectorImpl< WriteRef > &Writes) const
void	removeRegisterWrite (const WriteState &WS, MutableArrayRef< unsigned > FreedPhysRegs)
bool	tryEliminateMove (WriteState &WS, ReadState &RS)
unsigned	isAvailable (ArrayRef< unsigned > Regs) const
unsigned	getNumRegisterFiles () const
void	cycleStart ()
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 36 of file RegisterFile.h.

Constructor & Destructor Documentation

RegisterFile()

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

Definition at line 26 of file RegisterFile.cpp.

References assert(), E, llvm::SmallVectorImpl< T >::emplace_back(), llvm::MCSchedModel::getExtraProcessorInfo(), llvm::MCSchedModel::hasExtraProcessorInfo(), I, Info, llvm::MCRegisterFileDesc::NumPhysRegs, llvm::MCRegisterFileDesc::NumRegisterCostEntries, llvm::MCExtraProcessorInfo::NumRegisterFiles, llvm::MCRegisterFileDesc::RegisterCostEntryIdx, llvm::MCExtraProcessorInfo::RegisterCostTable, and llvm::MCExtraProcessorInfo::RegisterFiles.

Member Function Documentation

addRegisterRead()

void llvm::mca::RegisterFile::addRegisterRead	(	ReadState &	RS,
		SmallVectorImpl< WriteRef > &	Writes
	)		const

Definition at line 404 of file RegisterFile.cpp.

References llvm::mca::ReadState::getRegisterID(), llvm::mca::ReadState::isIndependentFromDef(), llvm::mca::ReadState::setDependentWrites(), llvm::mca::ReadState::setPRF(), llvm::mca::ReadState::setReadZero(), and llvm::SmallVectorBase::size().

addRegisterWrite()

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

Definition at line 148 of file RegisterFile.cpp.

References llvm::mca::WriteState::addUser(), assert(), llvm::APInt::clearBit(), llvm::mca::WriteState::clearsSuperRegisters(), llvm::dbgs(), 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, second, llvm::APInt::setBit(), and llvm::mca::WriteState::setPRF().

cycleStart()

void llvm::mca::RegisterFile::cycleStart

(

)

Definition at line 62 of file RegisterFile.cpp.

References llvm::MCRegisterFileDesc::AllowZeroMoveEliminationOnly, llvm::SmallVectorImpl< T >::emplace_back(), llvm::ArrayRef< T >::empty(), llvm::errs(), llvm::MCRegisterInfo::getName(), llvm::MCRegisterInfo::getRegClass(), I, llvm::MCRegisterInfo::isSuperRegister(), llvm::MCRegisterFileDesc::MaxMovesEliminatedPerCycle, llvm::MCRegisterFileDesc::NumPhysRegs, Reg, and llvm::SmallVectorBase::size().

Referenced by llvm::mca::DispatchStage::cycleStart(), and getNumRegisterFiles().

dump()

void llvm::mca::RegisterFile::dump

(

)

const

Definition at line 466 of file RegisterFile.cpp.

References llvm::dbgs(), llvm::APInt::dump(), E, llvm::MCRegisterInfo::getName(), getNumRegisterFiles(), llvm::MCRegisterInfo::getNumRegs(), I, and llvm::NVPTX::PTXCvtMode::RM.

Referenced by llvm::mca::DispatchStage::dump(), and getNumRegisterFiles().

getNumRegisterFiles()

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

inline

Definition at line 226 of file RegisterFile.h.

References cycleStart(), dump(), and llvm::SmallVectorBase::size().

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

isAvailable()

unsigned llvm::mca::RegisterFile::isAvailable

(

ArrayRef< unsigned >

Regs

)

const

Definition at line 418 of file RegisterFile.cpp.

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

removeRegisterWrite()

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

Definition at line 244 of file RegisterFile.cpp.

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

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

tryEliminateMove()

bool llvm::mca::RegisterFile::tryEliminateMove	(	WriteState &	WS,
		ReadState &	RS
	)

Definition at line 292 of file RegisterFile.cpp.

References assert(), llvm::SmallVectorTemplateCommon< T >::begin(), llvm::mca::WriteState::clearsSuperRegisters(), llvm::dbgs(), llvm::SmallVectorTemplateCommon< T >::end(), llvm::MCRegisterInfo::getName(), llvm::mca::WriteState::getRegisterID(), llvm::mca::ReadState::getRegisterID(), llvm::mca::WriteRef::getSourceIndex(), llvm::mca::WriteRef::getWriteState(), I, llvm::mca::WriteRef::isValid(), LLVM_DEBUG, llvm::SmallVectorTemplateBase< T >::push_back(), llvm::SmallVectorImpl< T >::resize(), second, llvm::mca::WriteState::setEliminated(), llvm::mca::ReadState::setReadZero(), llvm::mca::WriteState::setWriteZero(), llvm::SmallVectorBase::size(), and llvm::sort().

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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