llvm::mca::InstrBuilder Class Reference

A builder class that knows how to construct Instruction objects. More...

#include "llvm/MCA/InstrBuilder.h"

Public Member Functions
	InstrBuilder (const MCSubtargetInfo &STI, const MCInstrInfo &MCII, const MCRegisterInfo &RI, const MCInstrAnalysis *IA)
void	clear ()
Expected< std::unique_ptr< Instruction > >	createInstruction (const MCInst &MCI)

Detailed Description

A builder class that knows how to construct Instruction objects.

Every llvm-mca Instruction is described by an object of class InstrDesc. An InstrDesc describes which registers are read/written by the instruction, as well as the instruction latency and hardware resources consumed.

This class is used by the tool to construct Instructions and instruction descriptors (i.e. InstrDesc objects). Information from the machine scheduling model is used to identify processor resources that are consumed by an instruction.

Definition at line 39 of file InstrBuilder.h.

Constructor & Destructor Documentation

InstrBuilder()

llvm::mca::InstrBuilder::InstrBuilder	(	const MCSubtargetInfo &	STI,
		const MCInstrInfo &	MCII,
		const MCRegisterInfo &	RI,
		const MCInstrAnalysis *	IA
	)

Definition at line 28 of file InstrBuilder.cpp.

References llvm::mca::computeProcResourceMasks(), llvm::MCSchedModel::getNumProcResourceKinds(), llvm::MCSubtargetInfo::getSchedModel(), and llvm::SmallVectorImpl< T >::resize().

Member Function Documentation

clear()

void llvm::mca::InstrBuilder::clear ( )

inline

Definition at line 66 of file InstrBuilder.h.

References createInstruction(), and llvm::DenseMap< KeyT, ValueT, KeyInfoT, BucketT >::shrink_and_clear().

createInstruction()

Expected< std::unique_ptr< Instruction > > llvm::mca::InstrBuilder::createInstruction

(

const MCInst &

MCI

)

Definition at line 598 of file InstrBuilder.cpp.

References assert(), llvm::MCInstrAnalysis::clearsSuperRegisters(), D, llvm::MCInst::getOperand(), llvm::MCSchedModel::getProcessorID(), llvm::MCOperand::getReg(), llvm::MCSubtargetInfo::getSchedModel(), llvm::MCInstrAnalysis::isDependencyBreaking(), llvm::mca::ReadDescriptor::isImplicitRead(), llvm::mca::WriteDescriptor::isImplicitWrite(), llvm::MCInstrAnalysis::isOptimizableRegisterMove(), llvm::mca::WriteDescriptor::IsOptionalDef, llvm::MCOperand::isReg(), llvm::MCInstrAnalysis::isZeroIdiom(), llvm::BitmaskEnumDetail::Mask(), llvm::mca::WriteDescriptor::OpIndex, llvm::mca::ReadDescriptor::OpIndex, llvm::mca::InstrDesc::Reads, llvm::mca::WriteDescriptor::RegisterID, llvm::mca::ReadDescriptor::RegisterID, llvm::mca::ReadState::setIndependentFromDef(), llvm::Expected< T >::takeError(), llvm::mca::ReadDescriptor::UseIndex, and llvm::mca::InstrDesc::Writes.

Referenced by clear().

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

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