class CSEMIRBuilder

Declaration

class CSEMIRBuilder : public MachineIRBuilder { /* full declaration omitted */ };

Description

Defines a builder that does CSE of MachineInstructions using GISelCSEInfo. Eg usage. GISelCSEInfo *Info = &getAnalysis <GISelCSEAnalysisWrapperPass >().getCSEInfo(); CSEMIRBuilder CB(Builder.getState()); CB.setCSEInfo(Info); auto A = CB.buildConstant(s32, 42); auto B = CB.buildConstant(s32, 42); assert(A == B); unsigned CReg = MRI.createGenericVirtualRegister(s32); auto C = CB.buildConstant(CReg, 42); assert(C->getOpcode() == TargetOpcode::COPY); Explicitly passing in a register would materialize a copy if possible. CSEMIRBuilder also does trivial constant folding for binary ops.

Declared at: llvm/include/llvm/CodeGen/GlobalISel/CSEMIRBuilder.h:32

Inherits from: MachineIRBuilder

Method Overview

• public llvm::MachineInstrBuilder buildConstant(const llvm::DstOp & Res, const llvm::ConstantInt & Val)
• public llvm::MachineInstrBuilder buildFConstant(const llvm::DstOp & Res, const llvm::ConstantFP & Val)
• public llvm::MachineInstrBuilder buildInstr(unsigned int Opc, ArrayRef<llvm::DstOp> DstOps, ArrayRef<llvm::SrcOp> SrcOps, Optional<unsigned int> Flag = None)

Inherited from MachineIRBuilder:

• public buildAShr
• public buildAdd
• public buildAddrSpaceCast
• public buildAnd
• public buildAnyExt
• public buildAnyExtOrTrunc
• public buildAtomicCmpXchg
• public buildAtomicCmpXchgWithSuccess
• public buildAtomicRMW
• public buildAtomicRMWAdd
• public buildAtomicRMWAnd
• public buildAtomicRMWFAdd
• public buildAtomicRMWFSub
• public buildAtomicRMWMax
• public buildAtomicRMWMin
• public buildAtomicRMWNand
• public buildAtomicRMWOr
• public buildAtomicRMWSub
• public buildAtomicRMWUmax
• public buildAtomicRMWUmin
• public buildAtomicRMWXchg
• public buildAtomicRMWXor
• public buildBitcast
• public buildBlockAddress
• public buildBoolExt
• public buildBr
• public buildBrCond
• public buildBrIndirect
• public buildBrJT
• public buildBuildVector
• public buildBuildVectorTrunc
• public buildCTLZ
• public buildCTLZ_ZERO_UNDEF
• public buildCTPOP
• public buildCTTZ
• public buildCTTZ_ZERO_UNDEF
• public buildCast
• public buildConcatVectors
• public buildConstDbgValue
• public buildConstant
• public buildConstant
• public buildConstant
• public buildCopy
• public buildDbgLabel
• public buildDirectDbgValue
• public buildDynStackAlloc
• public buildExtOrTrunc
• public buildExtract
• public buildExtractVectorElement
• public buildFAbs
• public buildFAdd
• public buildFCanonicalize
• public buildFCmp
• public buildFConstant
• public buildFConstant
• public buildFConstant
• public buildFCopysign
• public buildFIDbgValue
• public buildFMA
• public buildFMAD
• public buildFMul
• public buildFNeg
• public buildFPExt
• public buildFPTOSI
• public buildFPTOUI
• public buildFPTrunc
• public buildFSub
• public buildFence
• public buildFrameIndex
• public buildGlobalValue
• public buildICmp
• public buildIndirectDbgValue
• public buildInsert
• public buildInsertVectorElement
• public buildInstr
• public buildInstr
• public buildInstrNoInsert
• public buildIntToPtr
• public buildIntrinsic
• public buildIntrinsic
• public buildIntrinsicTrunc
• public buildJumpTable
• public buildLShr
• public buildLoad
• public buildLoadInstr
• public buildMerge
• public buildMul
• public buildNot
• public buildOr
• public buildPtrAdd
• public buildPtrMask
• public buildPtrToInt
• public buildSExt
• public buildSExtOrTrunc
• public buildSITOFP
• public buildSMax
• public buildSMin
• public buildSMulH
• public buildSelect
• public buildSequence
• public buildShl
• public buildSplatVector
• public buildStore
• public buildSub
• public buildTrunc
• public buildUAdde
• public buildUAddo
• public buildUITOFP
• public buildUMax
• public buildUMin
• public buildUMulH
• public buildUndef
• public buildUnmerge
• public buildUnmerge
• public buildUnmerge
• public buildXor
• public buildZExt
• public buildZExtOrTrunc
• public getBoolExtOp
• public getCSEInfo
• public getCSEInfo
• public getDL
• public getDataLayout
• public getDebugLoc
• public getInsertPt
• public getMBB
• public getMBB
• public getMF
• public getMF
• public getMRI
• public getMRI
• public getState
• public getTII
• public insertInstr
• public materializePtrAdd
• protected recordInsertion
• public setCSEInfo
• public setChangeObserver
• public setDebugLoc
• public setInsertPt
• public setInstr
• public setMBB
• public setMF
• public stopObservingChanges
• protected validateBinaryOp
• protected validateSelectOp
• protected validateShiftOp
• protected validateTruncExt

Methods

¶llvm::MachineInstrBuilder buildConstant(
    const llvm::DstOp& Res,
    const llvm::ConstantInt& Val)

Description

Build and insert \p Res = G_CONSTANT \p Val G_CONSTANT is an integer constant with the specified size and value. \p Val will be extended or truncated to the size of \p Reg.

Declared at: llvm/include/llvm/CodeGen/GlobalISel/CSEMIRBuilder.h:100

Parameters

const llvm::DstOp& Res

const llvm::ConstantInt& Val

Returns

The newly created instruction.

¶llvm::MachineInstrBuilder buildFConstant(
    const llvm::DstOp& Res,
    const llvm::ConstantFP& Val)

Description

Build and insert \p Res = G_FCONSTANT \p Val G_FCONSTANT is a floating-point constant with the specified size and value.

Declared at: llvm/include/llvm/CodeGen/GlobalISel/CSEMIRBuilder.h:105

Parameters

const llvm::DstOp& Res

const llvm::ConstantFP& Val

Returns

The newly created instruction.

¶llvm::MachineInstrBuilder buildInstr(
    unsigned int Opc,
    ArrayRef<llvm::DstOp> DstOps,
    ArrayRef<llvm::SrcOp> SrcOps,
    Optional<unsigned int> Flag = None)

Declared at: llvm/include/llvm/CodeGen/GlobalISel/CSEMIRBuilder.h:94

Parameters

unsigned int Opc

ArrayRef<llvm::DstOp> DstOps

ArrayRef<llvm::SrcOp> SrcOps

Optional<unsigned int> Flag = None