LLVM 22.0.0git
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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
void setRegisterID (const MCPhysReg RegID)
unsigned getRegisterFileID () const
unsigned getLatency () const
unsigned getDependentWriteCyclesLeft () const
const WriteState * getDependentWrite () const
const CriticalDependency & getCriticalRegDep () const
LLVM_ABI void addUser (unsigned IID, ReadState *Use, int ReadAdvance)
LLVM_ABI 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)
LLVM_ABI void writeStartEvent (unsigned IID, MCPhysReg RegID, unsigned Cycles)
void setWriteZero ()
void setEliminated ()
void setPRF (unsigned PRF)
LLVM_ABI void cycleEvent ()
LLVM_ABI 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 196 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 247 of file Instruction.h.

References llvm::mca::UNKNOWN_CYCLES.

Referenced by addUser(), getDependentWrite(), operator=(), setDependentWrite(), and WriteState().

◆ WriteState() [2/2]

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

References llvm::Other, and WriteState().

Member Function Documentation

◆ addUser() [1/2]

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

Definition at line 72 of file Instruction.cpp.

References 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 85 of file Instruction.cpp.

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

◆ clearsSuperRegisters()

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

Definition at line 286 of file Instruction.h.

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

◆ cycleEvent()

void llvm::mca::WriteState::cycleEvent ( )

Definition at line 96 of file Instruction.cpp.

References llvm::mca::UNKNOWN_CYCLES.

◆ dump()

void llvm::mca::WriteState::dump ( ) const

Definition at line 125 of file Instruction.cpp.

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

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

◆ getCriticalRegDep()

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

Definition at line 267 of file Instruction.h.

◆ getCyclesLeft()

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

Definition at line 257 of file Instruction.h.

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

◆ getDependentWrite()

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

Definition at line 266 of file Instruction.h.

References WriteState().

◆ getDependentWriteCyclesLeft()

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

Definition at line 263 of file Instruction.h.

Referenced by isReady().

◆ getLatency()

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

Definition at line 262 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterWrite(), dump(), isReady(), and onInstructionIssued().

◆ getNumUsers()

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

Definition at line 279 of file Instruction.h.

◆ getRegisterFileID()

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

Definition at line 261 of file Instruction.h.

◆ getRegisterID()

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

Definition at line 259 of file Instruction.h.

Referenced by llvm::mca::RegisterFile::addRegisterWrite(), llvm::mca::RegisterFile::canEliminateMove(), llvm::mca::RegisterFile::collectWrites(), dump(), llvm::mca::RegisterFile::removeRegisterWrite(), and llvm::mca::RegisterFile::tryEliminateMoveOrSwap().

◆ getWriteResourceID()

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

Definition at line 258 of file Instruction.h.

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

◆ isEliminated()

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

Definition at line 288 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 297 of file Instruction.h.

References llvm::mca::UNKNOWN_CYCLES.

◆ isReady()

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

Definition at line 290 of file Instruction.h.

References getDependentWriteCyclesLeft(), and getLatency().

◆ isWriteZero()

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

Definition at line 287 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 54 of file Instruction.cpp.

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

◆ operator=()

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

References llvm::Other, and WriteState().

◆ setDependentWrite()

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

Definition at line 301 of file Instruction.h.

References llvm::Other, and WriteState().

◆ setEliminated()

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

Definition at line 304 of file Instruction.h.

References assert().

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

◆ setPRF()

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

Definition at line 310 of file Instruction.h.

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

◆ setRegisterID()

void llvm::mca::WriteState::setRegisterID ( const MCPhysReg RegID)
inline

Definition at line 260 of file Instruction.h.

◆ setWriteZero()

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

Definition at line 303 of file Instruction.h.

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

◆ writeStartEvent()

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

Definition at line 21 of file Instruction.cpp.

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