llvm::mca::ReadState Class Reference

Tracks register operand latency in cycles. More...

#include "llvm/MCA/Instruction.h"

Public Member Functions
	ReadState (const ReadDescriptor &Desc, unsigned RegID)
const ReadDescriptor &	getDescriptor () const
unsigned	getSchedClass () const
unsigned	getRegisterID () const
unsigned	getRegisterFileID () const
bool	isReady () const
bool	isImplicitRead () const
bool	isIndependentFromDef () const
void	setIndependentFromDef ()
void	cycleEvent ()
void	writeStartEvent (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 205 of file Instruction.h.

Constructor & Destructor Documentation

ReadState()

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

inline

Definition at line 233 of file Instruction.h.

Member Function Documentation

cycleEvent()

void llvm::mca::ReadState::cycleEvent

(

)

Definition at line 97 of file Instruction.cpp.

References llvm::mca::UNKNOWN_CYCLES.

getDescriptor()

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

inline

Definition at line 238 of file Instruction.h.

getRegisterFileID()

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

inline

Definition at line 241 of file Instruction.h.

getRegisterID()

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

inline

Definition at line 240 of file Instruction.h.

References llvm::mca::WriteDescriptor::RegisterID.

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

getSchedClass()

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

inline

Definition at line 239 of file Instruction.h.

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

isImplicitRead()

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

inline

Definition at line 244 of file Instruction.h.

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

isIndependentFromDef()

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

inline

Definition at line 246 of file Instruction.h.

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

isReady()

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

inline

Definition at line 243 of file Instruction.h.

Referenced by llvm::mca::Instruction::cycleEvent(), and llvm::mca::Instruction::update().

isReadZero()

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

inline

Definition at line 256 of file Instruction.h.

setDependentWrites()

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

inline

Definition at line 251 of file Instruction.h.

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

setIndependentFromDef()

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

inline

Definition at line 247 of file Instruction.h.

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

setPRF()

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

inline

Definition at line 258 of file Instruction.h.

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

setReadZero()

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

inline

Definition at line 257 of file Instruction.h.

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

writeStartEvent()

void llvm::mca::ReadState::writeStartEvent

(

unsigned

Cycles

)

Definition at line 22 of file Instruction.cpp.

References assert(), llvm::max(), and llvm::mca::UNKNOWN_CYCLES.

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

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

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