llvm::mca::WriteState Class Reference

Tracks uses of a register definition (e.g. More...

#include "llvm/MCA/Instruction.h"

Public Member Functions
	WriteState (const WriteDescriptor &Desc, MCPhysReg RegID, bool clearsSuperRegs=false, bool writesZero=false)
	WriteState (const WriteState &Other)=default
WriteState &	operator= (const WriteState &Other)=default
int	getCyclesLeft () const
unsigned	getWriteResourceID () const
MCPhysReg	getRegisterID () const
unsigned	getRegisterFileID () const
unsigned	getLatency () const
unsigned	getDependentWriteCyclesLeft () const
const WriteState *	getDependentWrite () const
const CriticalDependency &	getCriticalRegDep () const
void	addUser (unsigned IID, ReadState *Use, int ReadAdvance)
void	addUser (unsigned IID, WriteState *Use)
unsigned	getNumUsers () const
bool	clearsSuperRegisters () const
bool	isWriteZero () const
bool	isEliminated () const
bool	isReady () const
bool	isExecuted () const
void	setDependentWrite (const WriteState *Other)
void	writeStartEvent (unsigned IID, MCPhysReg RegID, unsigned Cycles)
void	setWriteZero ()
void	setEliminated ()
void	setPRF (unsigned PRF)
void	cycleEvent ()
void	onInstructionIssued (unsigned IID)
void	dump () const

Detailed Description

Tracks uses of a register definition (e.g.

register write).

Each implicit/explicit register write is associated with an instance of this class. A WriteState object tracks the dependent users of a register write. It also tracks how many cycles are left before the write back stage.

Definition at line 99 of file Instruction.h.

Constructor & Destructor Documentation

WriteState() [1/2]

llvm::mca::WriteState::WriteState ( const WriteDescriptor &  Desc, MCPhysReg  RegID, bool  clearsSuperRegs = false, bool  writesZero = false  )

inline

Definition at line 150 of file Instruction.h.

WriteState() [2/2]

llvm::mca::WriteState::WriteState ( const WriteState &  Other )

default

Member Function Documentation

addUser() [1/2]

void llvm::mca::WriteState::addUser	(	unsigned	IID,
		ReadState *	Use,
		int	ReadAdvance
	)

Definition at line 71 of file Instruction.cpp.

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

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

addUser() [2/2]

void llvm::mca::WriteState::addUser	(	unsigned	IID,
		WriteState *	Use
	)

Definition at line 84 of file Instruction.cpp.

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

clearsSuperRegisters()

bool llvm::mca::WriteState::clearsSuperRegisters ( ) const

inline

Definition at line 188 of file Instruction.h.

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

cycleEvent()

void llvm::mca::WriteState::cycleEvent

(

)

Definition at line 95 of file Instruction.cpp.

References llvm::mca::UNKNOWN_CYCLES.

dump()

void llvm::mca::WriteState::dump

(

)

const

Definition at line 124 of file Instruction.cpp.

References llvm::dbgs(), getCyclesLeft(), getLatency(), getRegisterID(), and llvm::mca::WriteDescriptor::OpIndex.

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

getCriticalRegDep()

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

inline

Definition at line 169 of file Instruction.h.

getCyclesLeft()

int llvm::mca::WriteState::getCyclesLeft ( ) const

inline

Definition at line 160 of file Instruction.h.

Referenced by llvm::mca::checkRegisterHazard(), dump(), and llvm::mca::RegisterFile::removeRegisterWrite().

getDependentWrite()

const WriteState* llvm::mca::WriteState::getDependentWrite ( ) const

inline

Definition at line 168 of file Instruction.h.

getDependentWriteCyclesLeft()

unsigned llvm::mca::WriteState::getDependentWriteCyclesLeft ( ) const

inline

Definition at line 165 of file Instruction.h.

Referenced by isReady().

getLatency()

unsigned llvm::mca::WriteState::getLatency ( ) const

inline

Definition at line 164 of file Instruction.h.

References llvm::mca::WriteDescriptor::Latency.

Referenced by dump(), isReady(), and onInstructionIssued().

getNumUsers()

unsigned llvm::mca::WriteState::getNumUsers ( ) const

inline

Definition at line 181 of file Instruction.h.

References Users.

getRegisterFileID()

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

inline

Definition at line 163 of file Instruction.h.

getRegisterID()

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

inline

Definition at line 162 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterWrite(), llvm::mca::checkRegisterHazard(), llvm::mca::RegisterFile::collectWrites(), dump(), llvm::mca::RegisterFile::removeRegisterWrite(), and llvm::mca::RegisterFile::tryEliminateMove().

getWriteResourceID()

unsigned llvm::mca::WriteState::getWriteResourceID ( ) const

inline

Definition at line 161 of file Instruction.h.

References llvm::mca::WriteDescriptor::SClassOrWriteResourceID.

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

isEliminated()

bool llvm::mca::WriteState::isEliminated ( ) const

inline

Definition at line 190 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterWrite(), and llvm::mca::RegisterFile::removeRegisterWrite().

isExecuted()

bool llvm::mca::WriteState::isExecuted ( ) const

inline

Definition at line 199 of file Instruction.h.

References llvm::mca::UNKNOWN_CYCLES.

Referenced by llvm::mca::WriteRef::isAvailable().

isReady()

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

inline

Definition at line 192 of file Instruction.h.

References getDependentWriteCyclesLeft(), and getLatency().

isWriteZero()

bool llvm::mca::WriteState::isWriteZero ( ) const

inline

Definition at line 189 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterWrite(), llvm::mca::WriteRef::isWriteZero(), and llvm::mca::RegisterFile::removeRegisterWrite().

onInstructionIssued()

void llvm::mca::WriteState::onInstructionIssued

(

unsigned

IID

)

Definition at line 53 of file Instruction.cpp.

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

operator=()

WriteState& llvm::mca::WriteState::operator= ( const WriteState &  Other )

default

setDependentWrite()

void llvm::mca::WriteState::setDependentWrite ( const WriteState *  Other )

inline

Definition at line 203 of file Instruction.h.

References Other.

setEliminated()

void llvm::mca::WriteState::setEliminated ( )

inline

Definition at line 206 of file Instruction.h.

References assert(), and Users.

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

setPRF()

void llvm::mca::WriteState::setPRF ( unsigned  PRF )

inline

Definition at line 212 of file Instruction.h.

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

setWriteZero()

void llvm::mca::WriteState::setWriteZero ( )

inline

Definition at line 205 of file Instruction.h.

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

writeStartEvent()

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

Definition at line 21 of file Instruction.cpp.

References llvm::mca::CriticalDependency::Cycles, llvm::mca::CriticalDependency::IID, and llvm::mca::CriticalDependency::RegID.

Referenced by 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