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, unsigned RegID, bool clearsSuperRegs=false, bool writesZero=false)
	WriteState (const WriteState &Other)=default
WriteState &	operator= (const WriteState &Other)=default
int	getCyclesLeft () const
unsigned	getWriteResourceID () const
unsigned	getRegisterID () const
unsigned	getRegisterFileID () const
unsigned	getLatency () const
void	addUser (ReadState *Use, int ReadAdvance)
void	addUser (WriteState *Use)
unsigned	getDependentWriteCyclesLeft () const
unsigned	getNumUsers () const
bool	clearsSuperRegisters () const
bool	isWriteZero () const
bool	isEliminated () const
bool	isExecuted () const
const WriteState *	getDependentWrite () const
void	setDependentWrite (WriteState *Other)
void	writeStartEvent (unsigned Cycles)
void	setWriteZero ()
void	setEliminated ()
void	setPRF (unsigned PRF)
void	cycleEvent ()
void	onInstructionIssued ()
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 90 of file Instruction.h.

Constructor & Destructor Documentation

WriteState() [1/2]

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

inline

Definition at line 139 of file Instruction.h.

References Other.

WriteState() [2/2]

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

default

Member Function Documentation

addUser() [1/2]

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

Definition at line 58 of file Instruction.cpp.

References llvm::find_if(), llvm::max(), llvm::mca::UNKNOWN_CYCLES, Users, and llvm::mca::ReadState::writeStartEvent().

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

addUser() [2/2]

void llvm::mca::WriteState::addUser

(

WriteState *

Use

)

Definition at line 75 of file Instruction.cpp.

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

clearsSuperRegisters()

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

inline

Definition at line 169 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 86 of file Instruction.cpp.

References llvm::mca::UNKNOWN_CYCLES.

dump()

void llvm::mca::WriteState::dump

(

)

const

Definition at line 115 of file Instruction.cpp.

References llvm::dbgs(), getLatency(), and llvm::mca::ReadState::getRegisterID().

getCyclesLeft()

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

inline

Definition at line 149 of file Instruction.h.

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

getDependentWrite()

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

inline

Definition at line 176 of file Instruction.h.

getDependentWriteCyclesLeft()

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

inline

Definition at line 158 of file Instruction.h.

getLatency()

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

inline

Definition at line 153 of file Instruction.h.

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

getNumUsers()

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

inline

Definition at line 162 of file Instruction.h.

References llvm::SmallVectorBase::size().

Referenced by llvm::mca::InstructionBase::hasDependentUsers().

getRegisterFileID()

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

inline

Definition at line 152 of file Instruction.h.

getRegisterID()

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

inline

Definition at line 151 of file Instruction.h.

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

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

getWriteResourceID()

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

inline

Definition at line 150 of file Instruction.h.

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

isEliminated()

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

inline

Definition at line 171 of file Instruction.h.

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

isExecuted()

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

inline

Definition at line 172 of file Instruction.h.

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

isWriteZero()

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

inline

Definition at line 170 of file Instruction.h.

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

onInstructionIssued()

void llvm::mca::WriteState::onInstructionIssued

(

)

Definition at line 40 of file Instruction.cpp.

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

operator=()

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

default

setDependentWrite()

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

inline

Definition at line 177 of file Instruction.h.

Referenced by addUser().

setEliminated()

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

inline

Definition at line 184 of file Instruction.h.

References assert(), and llvm::SmallVectorBase::empty().

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

setPRF()

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

inline

Definition at line 190 of file Instruction.h.

References llvm::dump().

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

setWriteZero()

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

inline

Definition at line 183 of file Instruction.h.

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

writeStartEvent()

void llvm::mca::WriteState::writeStartEvent ( unsigned  Cycles )

inline

Definition at line 178 of file Instruction.h.

Referenced by addUser().

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

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