class WriteState

Declaration

class WriteState { /* full declaration omitted */ };

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.

Declared at: llvm/include/llvm/MCA/Instruction.h:99

Method Overview

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

Methods

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

Declared at: llvm/include/llvm/MCA/Instruction.h:157

Parameters

const llvm::mca::WriteState& Other

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

Declared at: llvm/include/llvm/MCA/Instruction.h:150

Parameters

const llvm::mca::WriteDescriptor& Desc

llvm::MCPhysReg RegID

bool clearsSuperRegs = false

bool writesZero = false

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

Declared at: llvm/include/llvm/MCA/Instruction.h:179

Parameters

unsigned int IID

llvm::mca::WriteState* Use

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

Declared at: llvm/include/llvm/MCA/Instruction.h:175

Parameters

unsigned int IID

llvm::mca::ReadState* Use

int ReadAdvance

¶bool clearsSuperRegisters() const

Declared at: llvm/include/llvm/MCA/Instruction.h:188

¶void cycleEvent()

Declared at: llvm/include/llvm/MCA/Instruction.h:215

¶void dump() const

Declared at: llvm/include/llvm/MCA/Instruction.h:219

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

Declared at: llvm/include/llvm/MCA/Instruction.h:169

¶int getCyclesLeft() const

Declared at: llvm/include/llvm/MCA/Instruction.h:160

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

Declared at: llvm/include/llvm/MCA/Instruction.h:168

¶unsigned int getDependentWriteCyclesLeft() const

Declared at: llvm/include/llvm/MCA/Instruction.h:165

¶unsigned int getLatency() const

Declared at: llvm/include/llvm/MCA/Instruction.h:164

¶unsigned int getNumUsers() const

Declared at: llvm/include/llvm/MCA/Instruction.h:181

¶unsigned int getRegisterFileID() const

Declared at: llvm/include/llvm/MCA/Instruction.h:163

¶llvm::MCPhysReg getRegisterID() const

Declared at: llvm/include/llvm/MCA/Instruction.h:162

¶unsigned int getWriteResourceID() const

Declared at: llvm/include/llvm/MCA/Instruction.h:161

¶bool isEliminated() const

Declared at: llvm/include/llvm/MCA/Instruction.h:190

¶bool isExecuted() const

Declared at: llvm/include/llvm/MCA/Instruction.h:199

¶bool isReady() const

Declared at: llvm/include/llvm/MCA/Instruction.h:192

¶bool isWriteZero() const

Declared at: llvm/include/llvm/MCA/Instruction.h:189

¶void onInstructionIssued(unsigned int IID)

Declared at: llvm/include/llvm/MCA/Instruction.h:216

Parameters

unsigned int IID

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

Declared at: llvm/include/llvm/MCA/Instruction.h:203

Parameters

const llvm::mca::WriteState* Other

¶void setEliminated()

Declared at: llvm/include/llvm/MCA/Instruction.h:206

¶void setPRF(unsigned int PRF)

Declared at: llvm/include/llvm/MCA/Instruction.h:212

Parameters

unsigned int PRF

¶void setWriteZero()

Declared at: llvm/include/llvm/MCA/Instruction.h:205

¶void writeStartEvent(unsigned int IID,
                     llvm::MCPhysReg RegID,
                     unsigned int Cycles)

Declared at: llvm/include/llvm/MCA/Instruction.h:204

Parameters

unsigned int IID

llvm::MCPhysReg RegID

unsigned int Cycles