class X86InstrPostProcess

Declaration

class X86InstrPostProcess : public InstrPostProcess { /* full declaration omitted */ };

Description

Class which can be overriden by targets to modify the mca::Instruction objects before the pipeline starts. A common usage of this class is to add immediate operands to certain instructions or to remove Defs/Uses from an instruction where the schedulinng model is incorrect.

Declared at: llvm/lib/Target/X86/MCA/X86CustomBehaviour.h:27

Inherits from: InstrPostProcess

Member Variables

Inherited from InstrPostProcess:

protected STI

protected MCII

Method Overview

• public X86InstrPostProcess(const llvm::MCSubtargetInfo & STI, const llvm::MCInstrInfo & MCII)
• public void postProcessInstruction(std::unique_ptr<Instruction> & Inst, const llvm::MCInst & MCI)
• private void processWaitCnt(std::unique_ptr<Instruction> & Inst, const llvm::MCInst & MCI)
• private void setMemBarriers(std::unique_ptr<Instruction> & Inst, const llvm::MCInst & MCI)
• public ~X86InstrPostProcess()

Inherited from InstrPostProcess:

• public postProcessInstruction
• public resetState

Methods

¶X86InstrPostProcess(
    const llvm::MCSubtargetInfo& STI,
    const llvm::MCInstrInfo& MCII)

Declared at: llvm/lib/Target/X86/MCA/X86CustomBehaviour.h:35

Parameters

const llvm::MCSubtargetInfo& STI

const llvm::MCInstrInfo& MCII

¶void postProcessInstruction(
    std::unique_ptr<Instruction>& Inst,
    const llvm::MCInst& MCI)

Description

This method can be overriden by targets to modify the mca::Instruction object after it has been lowered from the MCInst. This is generally a less disruptive alternative to modifying the scheduling model.

Declared at: llvm/lib/Target/X86/MCA/X86CustomBehaviour.h:40

Parameters

std::unique_ptr<Instruction>& Inst

const llvm::MCInst& MCI

¶void processWaitCnt(
    std::unique_ptr<Instruction>& Inst,
    const llvm::MCInst& MCI)

Declared at: llvm/lib/Target/X86/MCA/X86CustomBehaviour.h:28

Parameters

std::unique_ptr<Instruction>& Inst

const llvm::MCInst& MCI

¶void setMemBarriers(
    std::unique_ptr<Instruction>& Inst,
    const llvm::MCInst& MCI)

Description

Called within X86InstrPostProcess to specify certain instructions as load and store barriers.

Declared at: llvm/lib/Target/X86/MCA/X86CustomBehaviour.h:32

Parameters

std::unique_ptr<Instruction>& Inst

const llvm::MCInst& MCI

¶~X86InstrPostProcess()

Declared at: llvm/lib/Target/X86/MCA/X86CustomBehaviour.h:38