llvm::mca::ReadState Class Reference

Tracks register operand latency in cycles. More...

#include "llvm/MCA/Instruction.h"

Public Member Functions
	ReadState (const ReadDescriptor &Desc, MCPhysReg RegID)
const ReadDescriptor &	getDescriptor () const
unsigned	getSchedClass () const
MCPhysReg	getRegisterID () const
unsigned	getRegisterFileID () const
const CriticalDependency &	getCriticalRegDep () const
bool	isPending () const
bool	isReady () const
bool	isImplicitRead () const
bool	isIndependentFromDef () const
void	setIndependentFromDef ()
void	cycleEvent ()
void	writeStartEvent (unsigned IID, MCPhysReg RegID, unsigned Cycles)
void	setDependentWrites (unsigned Writes)
bool	isReadZero () const
void	setReadZero ()
void	setPRF (unsigned ID)

Detailed Description

Tracks register operand latency in cycles.

A read may be dependent on more than one write. This occurs when some writes only partially update the register associated to this read.

Definition at line 326 of file Instruction.h.

Constructor & Destructor Documentation

ReadState()

llvm::mca::ReadState::ReadState ( const ReadDescriptor &  Desc, MCPhysReg  RegID  )

inline

Definition at line 356 of file Instruction.h.

Member Function Documentation

cycleEvent()

void llvm::mca::ReadState::cycleEvent

(

)

Definition at line 107 of file Instruction.cpp.

References llvm::mca::UNKNOWN_CYCLES.

getCriticalRegDep()

const CriticalDependency & llvm::mca::ReadState::getCriticalRegDep ( ) const

inline

Definition at line 365 of file Instruction.h.

getDescriptor()

const ReadDescriptor & llvm::mca::ReadState::getDescriptor ( ) const

inline

Definition at line 361 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterRead(), llvm::mca::RegisterFile::checkRAWHazards(), and llvm::mca::RegisterFile::collectWrites().

getRegisterFileID()

unsigned llvm::mca::ReadState::getRegisterFileID ( ) const

inline

Definition at line 364 of file Instruction.h.

getRegisterID()

MCPhysReg llvm::mca::ReadState::getRegisterID ( ) const

inline

Definition at line 363 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterRead(), llvm::mca::RegisterFile::canEliminateMove(), llvm::mca::RegisterFile::collectWrites(), and llvm::mca::RegisterFile::tryEliminateMoveOrSwap().

getSchedClass()

unsigned llvm::mca::ReadState::getSchedClass ( ) const

inline

Definition at line 362 of file Instruction.h.

References llvm::mca::ReadDescriptor::SchedClassID.

isImplicitRead()

bool llvm::mca::ReadState::isImplicitRead ( ) const

inline

Definition at line 369 of file Instruction.h.

References llvm::mca::ReadDescriptor::isImplicitRead().

isIndependentFromDef()

bool llvm::mca::ReadState::isIndependentFromDef ( ) const

inline

Definition at line 371 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterRead().

isPending()

bool llvm::mca::ReadState::isPending ( ) const

inline

Definition at line 367 of file Instruction.h.

isReady()

bool llvm::mca::ReadState::isReady ( ) const

inline

Definition at line 368 of file Instruction.h.

isReadZero()

bool llvm::mca::ReadState::isReadZero ( ) const

inline

Definition at line 381 of file Instruction.h.

setDependentWrites()

void llvm::mca::ReadState::setDependentWrites ( unsigned  Writes )

inline

Definition at line 376 of file Instruction.h.

References Writes.

Referenced by llvm::mca::RegisterFile::addRegisterRead().

setIndependentFromDef()

void llvm::mca::ReadState::setIndependentFromDef ( )

inline

Definition at line 372 of file Instruction.h.

Referenced by llvm::mca::InstrBuilder::createInstruction().

setPRF()

void llvm::mca::ReadState::setPRF ( unsigned  ID )

inline

Definition at line 383 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterRead().

setReadZero()

void llvm::mca::ReadState::setReadZero ( )

inline

Definition at line 382 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterRead(), and llvm::mca::RegisterFile::tryEliminateMoveOrSwap().

writeStartEvent()

void llvm::mca::ReadState::writeStartEvent	(	unsigned	IID,
		MCPhysReg	RegID,
		unsigned	Cycles
	)

Definition at line 30 of file Instruction.cpp.

References assert(), llvm::mca::CriticalDependency::Cycles, llvm::mca::CriticalDependency::IID, llvm::mca::CriticalDependency::RegID, and llvm::mca::UNKNOWN_CYCLES.

Referenced by llvm::mca::RegisterFile::addRegisterRead(), and llvm::mca::WriteState::onInstructionIssued().

---

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

• include/llvm/MCA/Instruction.h
• lib/MCA/Instruction.cpp