class InstCombiner

Declaration

class InstCombiner : public InstVisitor { /* full declaration omitted */ };

Description

The core instruction combiner logic. This class provides both the logic to recursively visit instructions and combine them.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:300

Inherits from: InstVisitor

Member Variables

public llvm::InstCombineWorklist& Worklist

A worklist of the instructions that need to be simplified.

public llvm::InstCombiner::BuilderTy& Builder

public uint64_t MaxArraySizeForCombine = 0

Maximum size of array considered when transforming.

Method Overview

• public unsigned int ComputeNumSignBits(const llvm::Value * Op, unsigned int Depth = 0, const llvm::Instruction * CxtI = nullptr) const
• public void CreateNonTerminatorUnreachable(llvm::Instruction * InsertAt)
• public llvm::Instruction * CreateOverflowTuple(llvm::IntrinsicInst * II, llvm::Value * Result, llvm::Constant * Overflow)
• public llvm::Instruction * FoldItoFPtoI(llvm::Instruction & FI)
• public llvm::Instruction * FoldShiftByConstant(llvm::Value * Op0, llvm::Constant * Op1, llvm::BinaryOperator & I)
• public llvm::Instruction * InsertNewInstBefore(llvm::Instruction * New, llvm::Instruction & Old)
• public llvm::Instruction * InsertNewInstWith(llvm::Instruction * New, llvm::Instruction & Old)
• public InstCombiner(llvm::InstCombineWorklist & Worklist, llvm::InstCombiner::BuilderTy & Builder, bool MinimizeSize, bool ExpensiveCombines, llvm::AliasAnalysis * AA, llvm::AssumptionCache & AC, llvm::TargetLibraryInfo & TLI, llvm::DominatorTree & DT, llvm::OptimizationRemarkEmitter & ORE, llvm::BlockFrequencyInfo * BFI, llvm::ProfileSummaryInfo * PSI, const llvm::DataLayout & DL, llvm::LoopInfo * LI)
• public bool MaskedValueIsZero(const llvm::Value * V, const llvm::APInt & Mask, unsigned int Depth = 0, const llvm::Instruction * CxtI = nullptr) const
• public llvm::Value * OptimizePointerDifference(llvm::Value * LHS, llvm::Value * RHS, llvm::Type * Ty, bool isNUW)
• public llvm::Instruction * SliceUpIllegalIntegerPHI(llvm::PHINode & PN)
• public llvm::Instruction * canonicalizeCondSignextOfHighBitExtractToSignextHighBitExtract(llvm::BinaryOperator & I)
• public llvm::LoadInst * combineLoadToNewType(llvm::LoadInst & LI, llvm::Type * NewTy, const llvm::Twine & Suffix = "")
• public llvm::Instruction * commonCastTransforms(llvm::CastInst & CI)
• public llvm::Instruction * commonDivTransforms(llvm::BinaryOperator & I)
• public llvm::Instruction * commonIDivTransforms(llvm::BinaryOperator & I)
• public llvm::Instruction * commonIRemTransforms(llvm::BinaryOperator & I)
• public llvm::Instruction * commonPointerCastTransforms(llvm::CastInst & CI)
• public llvm::Instruction * commonRemTransforms(llvm::BinaryOperator & I)
• public llvm::Instruction * commonShiftTransforms(llvm::BinaryOperator & I)
• public void computeKnownBits(const llvm::Value * V, llvm::KnownBits & Known, unsigned int Depth, const llvm::Instruction * CxtI) const
• public llvm::KnownBits computeKnownBits(const llvm::Value * V, unsigned int Depth, const llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflow(Instruction::BinaryOps BinaryOp, bool IsSigned, llvm::Value * LHS, llvm::Value * RHS, llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflowForSignedAdd(const llvm::Value * LHS, const llvm::Value * RHS, const llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflowForSignedMul(const llvm::Value * LHS, const llvm::Value * RHS, const llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflowForSignedSub(const llvm::Value * LHS, const llvm::Value * RHS, const llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflowForUnsignedAdd(const llvm::Value * LHS, const llvm::Value * RHS, const llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflowForUnsignedMul(const llvm::Value * LHS, const llvm::Value * RHS, const llvm::Instruction * CxtI) const
• public llvm::OverflowResult computeOverflowForUnsignedSub(const llvm::Value * LHS, const llvm::Value * RHS, const llvm::Instruction * CxtI) const
• public bool dominatesAllUses(const llvm::Instruction * DI, const llvm::Instruction * UI, const llvm::BasicBlock * DB) const
• public llvm::Instruction * eraseInstFromFunction(llvm::Instruction & I)
• public llvm::Instruction * foldVariableSignZeroExtensionOfVariableHighBitExtract(llvm::BinaryOperator & OldAShr)
• public llvm::AssumptionCache & getAssumptionCache() const
• public const llvm::DataLayout & getDataLayout() const
• public llvm::DominatorTree & getDominatorTree() const
• public llvm::LoopInfo * getLoopInfo() const
• public llvm::TargetLibraryInfo & getTargetLibraryInfo() const
• public bool isKnownToBeAPowerOfTwo(const llvm::Value * V, bool OrZero = false, unsigned int Depth = 0, const llvm::Instruction * CxtI = nullptr)
• public llvm::Value * reassociateShiftAmtsOfTwoSameDirectionShifts(llvm::BinaryOperator * Sh0, const llvm::SimplifyQuery & SQ, bool AnalyzeForSignBitExtraction = false)
• public llvm::Instruction * replaceInstUsesWith(llvm::Instruction & I, llvm::Value * V)
• public bool replacePointer(llvm::Instruction & I, llvm::Value * V)
• public bool replacedSelectWithOperand(llvm::SelectInst * SI, const llvm::ICmpInst * Icmp, const unsigned int SIOpd)
• public bool run()
• public bool simplifyDivRemOfSelectWithZeroOp(llvm::BinaryOperator & I)
• public llvm::Value * simplifyRangeCheck(llvm::ICmpInst * Cmp0, llvm::ICmpInst * Cmp1, bool Inverted)
• public llvm::Instruction * visitAShr(llvm::BinaryOperator & I)
• public llvm::Instruction * visitAdd(llvm::BinaryOperator & I)
• public llvm::Instruction * visitAddrSpaceCast(llvm::AddrSpaceCastInst & CI)
• public llvm::Instruction * visitAllocSite(llvm::Instruction & FI)
• public llvm::Instruction * visitAllocaInst(llvm::AllocaInst & AI)
• public llvm::Instruction * visitAnd(llvm::BinaryOperator & I)
• public llvm::Instruction * visitAtomicRMWInst(llvm::AtomicRMWInst & SI)
• public llvm::Instruction * visitBitCast(llvm::BitCastInst & CI)
• public llvm::Instruction * visitBranchInst(llvm::BranchInst & BI)
• public llvm::Instruction * visitCallBrInst(llvm::CallBrInst & CBI)
• public llvm::Instruction * visitCallInst(llvm::CallInst & CI)
• public llvm::Instruction * visitExtractElementInst(llvm::ExtractElementInst & EI)
• public llvm::Instruction * visitExtractValueInst(llvm::ExtractValueInst & EV)
• public llvm::Instruction * visitFAdd(llvm::BinaryOperator & I)
• public llvm::Instruction * visitFCmpInst(llvm::FCmpInst & I)
• public llvm::Instruction * visitFDiv(llvm::BinaryOperator & I)
• public llvm::Instruction * visitFMul(llvm::BinaryOperator & I)
• public llvm::Instruction * visitFNeg(llvm::UnaryOperator & I)
• public llvm::Instruction * visitFPExt(llvm::CastInst & CI)
• public llvm::Instruction * visitFPToSI(llvm::FPToSIInst & FI)
• public llvm::Instruction * visitFPToUI(llvm::FPToUIInst & FI)
• public llvm::Instruction * visitFPTrunc(llvm::FPTruncInst & CI)
• public llvm::Instruction * visitFRem(llvm::BinaryOperator & I)
• public llvm::Instruction * visitFSub(llvm::BinaryOperator & I)
• public llvm::Instruction * visitFenceInst(llvm::FenceInst & FI)
• public llvm::Instruction * visitFree(llvm::CallInst & FI)
• public llvm::Instruction * visitFreeze(llvm::FreezeInst & I)
• public llvm::Instruction * visitGetElementPtrInst(llvm::GetElementPtrInst & GEP)
• public llvm::Instruction * visitICmpInst(llvm::ICmpInst & I)
• public llvm::Instruction * visitInsertElementInst(llvm::InsertElementInst & IE)
• public llvm::Instruction * visitInsertValueInst(llvm::InsertValueInst & IV)
• public llvm::Instruction * visitInstruction(llvm::Instruction & I)
• public llvm::Instruction * visitIntToPtr(llvm::IntToPtrInst & CI)
• public llvm::Instruction * visitInvokeInst(llvm::InvokeInst & II)
• public llvm::Instruction * visitLShr(llvm::BinaryOperator & I)
• public llvm::Instruction * visitLandingPadInst(llvm::LandingPadInst & LI)
• public llvm::Instruction * visitLoadInst(llvm::LoadInst & LI)
• public llvm::Instruction * visitMul(llvm::BinaryOperator & I)
• public llvm::Instruction * visitOr(llvm::BinaryOperator & I)
• public llvm::Instruction * visitPHINode(llvm::PHINode & PN)
• public llvm::Instruction * visitPtrToInt(llvm::PtrToIntInst & CI)
• public llvm::Instruction * visitReturnInst(llvm::ReturnInst & RI)
• public llvm::Instruction * visitSDiv(llvm::BinaryOperator & I)
• public llvm::Instruction * visitSExt(llvm::SExtInst & CI)
• public llvm::Instruction * visitSIToFP(llvm::CastInst & CI)
• public llvm::Instruction * visitSRem(llvm::BinaryOperator & I)
• public llvm::Instruction * visitSelectInst(llvm::SelectInst & SI)
• public llvm::Instruction * visitShl(llvm::BinaryOperator & I)
• public llvm::Instruction * visitShuffleVectorInst(llvm::ShuffleVectorInst & SVI)
• public llvm::Instruction * visitStoreInst(llvm::StoreInst & SI)
• public llvm::Instruction * visitSub(llvm::BinaryOperator & I)
• public llvm::Instruction * visitSwitchInst(llvm::SwitchInst & SI)
• public llvm::Instruction * visitTrunc(llvm::TruncInst & CI)
• public llvm::Instruction * visitUDiv(llvm::BinaryOperator & I)
• public llvm::Instruction * visitUIToFP(llvm::CastInst & CI)
• public llvm::Instruction * visitURem(llvm::BinaryOperator & I)
• public llvm::Instruction * visitVACopyInst(llvm::VACopyInst & I)
• public llvm::Instruction * visitVAStartInst(llvm::VAStartInst & I)
• public llvm::Instruction * visitXor(llvm::BinaryOperator & I)
• public llvm::Instruction * visitZExt(llvm::ZExtInst & CI)

Methods

¶unsigned int ComputeNumSignBits(
    const llvm::Value* Op,
    unsigned int Depth = 0,
    const llvm::Instruction* CxtI = nullptr) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:749

Parameters

const llvm::Value* Op

unsigned int Depth = 0

const llvm::Instruction* CxtI = nullptr

¶void CreateNonTerminatorUnreachable(
    llvm::Instruction* InsertAt)

Description

Create and insert the idiom we use to indicate a block is unreachable without having to rewrite the CFG from within InstCombine.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:697

Parameters

llvm::Instruction* InsertAt

¶llvm::Instruction* CreateOverflowTuple(
    llvm::IntrinsicInst* II,
    llvm::Value* Result,
    llvm::Constant* Overflow)

Description

Creates a result tuple for an overflow intrinsic \p II with a given\p Result and a constant \p Overflow value.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:687

Parameters

llvm::IntrinsicInst* II

llvm::Value* Result

llvm::Constant* Overflow

¶llvm::Instruction* FoldItoFPtoI(
    llvm::Instruction& FI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:423

Parameters

llvm::Instruction& FI

¶llvm::Instruction* FoldShiftByConstant(
    llvm::Value* Op0,
    llvm::Constant* Op1,
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:406

Parameters

llvm::Value* Op0

llvm::Constant* Op1

llvm::BinaryOperator& I

¶llvm::Instruction* InsertNewInstBefore(
    llvm::Instruction* New,
    llvm::Instruction& Old)

Description

Inserts an instruction \p New before instruction \p Old Also adds the new instruction to the worklist and returns \p New so that it is suitable for use as the return from the visitation patterns.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:645

Parameters

llvm::Instruction* New

llvm::Instruction& Old

¶llvm::Instruction* InsertNewInstWith(
    llvm::Instruction* New,
    llvm::Instruction& Old)

Description

Same as InsertNewInstBefore, but also sets the debug loc.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:655

Parameters

llvm::Instruction* New

llvm::Instruction& Old

¶InstCombiner(
    llvm::InstCombineWorklist& Worklist,
    llvm::InstCombiner::BuilderTy& Builder,
    bool MinimizeSize,
    bool ExpensiveCombines,
    llvm::AliasAnalysis* AA,
    llvm::AssumptionCache& AC,
    llvm::TargetLibraryInfo& TLI,
    llvm::DominatorTree& DT,
    llvm::OptimizationRemarkEmitter& ORE,
    llvm::BlockFrequencyInfo* BFI,
    llvm::ProfileSummaryInfo* PSI,
    const llvm::DataLayout& DL,
    llvm::LoopInfo* LI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:338

Parameters

llvm::InstCombineWorklist& Worklist

llvm::InstCombiner::BuilderTy& Builder

bool MinimizeSize

bool ExpensiveCombines

llvm::AliasAnalysis* AA

llvm::AssumptionCache& AC

llvm::TargetLibraryInfo& TLI

llvm::DominatorTree& DT

llvm::OptimizationRemarkEmitter& ORE

llvm::BlockFrequencyInfo* BFI

llvm::ProfileSummaryInfo* PSI

const llvm::DataLayout& DL

llvm::LoopInfo* LI

¶bool MaskedValueIsZero(
    const llvm::Value* V,
    const llvm::APInt& Mask,
    unsigned int Depth = 0,
    const llvm::Instruction* CxtI = nullptr) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:744

Parameters

const llvm::Value* V

const llvm::APInt& Mask

unsigned int Depth = 0

const llvm::Instruction* CxtI = nullptr

¶llvm::Value* OptimizePointerDifference(
    llvm::Value* LHS,
    llvm::Value* RHS,
    llvm::Type* Ty,
    bool isNUW)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:372

Parameters

llvm::Value* LHS

llvm::Value* RHS

llvm::Type* Ty

bool isNUW

¶llvm::Instruction* SliceUpIllegalIntegerPHI(
    llvm::PHINode& PN)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:429

Parameters

llvm::PHINode& PN

¶llvm::Instruction*
canonicalizeCondSignextOfHighBitExtractToSignextHighBitExtract(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:397

Parameters

llvm::BinaryOperator& I

¶llvm::LoadInst* combineLoadToNewType(
    llvm::LoadInst& LI,
    llvm::Type* NewTy,
    const llvm::Twine& Suffix = "")

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:470

Parameters

llvm::LoadInst& LI

llvm::Type* NewTy

const llvm::Twine& Suffix = ""

¶llvm::Instruction* commonCastTransforms(
    llvm::CastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:408

Parameters

llvm::CastInst& CI

¶llvm::Instruction* commonDivTransforms(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:384

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* commonIDivTransforms(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:385

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* commonIRemTransforms(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:383

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* commonPointerCastTransforms(
    llvm::CastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:409

Parameters

llvm::CastInst& CI

¶llvm::Instruction* commonRemTransforms(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:382

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* commonShiftTransforms(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:403

Parameters

llvm::BinaryOperator& I

¶void computeKnownBits(
    const llvm::Value* V,
    llvm::KnownBits& Known,
    unsigned int Depth,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:728

Parameters

const llvm::Value* V

llvm::KnownBits& Known

unsigned int Depth

const llvm::Instruction* CxtI

¶llvm::KnownBits computeKnownBits(
    const llvm::Value* V,
    unsigned int Depth,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:733

Parameters

const llvm::Value* V

unsigned int Depth

const llvm::Instruction* CxtI

¶llvm::OverflowResult computeOverflow(
    Instruction::BinaryOps BinaryOp,
    bool IsSigned,
    llvm::Value* LHS,
    llvm::Value* RHS,
    llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:789

Parameters

Instruction::BinaryOps BinaryOp

bool IsSigned

llvm::Value* LHS

llvm::Value* RHS

llvm::Instruction* CxtI

¶llvm::OverflowResult computeOverflowForSignedAdd(
    const llvm::Value* LHS,
    const llvm::Value* RHS,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:772

Parameters

const llvm::Value* LHS

const llvm::Value* RHS

const llvm::Instruction* CxtI

¶llvm::OverflowResult computeOverflowForSignedMul(
    const llvm::Value* LHS,
    const llvm::Value* RHS,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:760

Parameters

const llvm::Value* LHS

const llvm::Value* RHS

const llvm::Instruction* CxtI

¶llvm::OverflowResult computeOverflowForSignedSub(
    const llvm::Value* LHS,
    const llvm::Value* RHS,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:784

Parameters

const llvm::Value* LHS

const llvm::Value* RHS

const llvm::Instruction* CxtI

¶llvm::OverflowResult
computeOverflowForUnsignedAdd(
    const llvm::Value* LHS,
    const llvm::Value* RHS,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:766

Parameters

const llvm::Value* LHS

const llvm::Value* RHS

const llvm::Instruction* CxtI

¶llvm::OverflowResult
computeOverflowForUnsignedMul(
    const llvm::Value* LHS,
    const llvm::Value* RHS,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:754

Parameters

const llvm::Value* LHS

const llvm::Value* RHS

const llvm::Instruction* CxtI

¶llvm::OverflowResult
computeOverflowForUnsignedSub(
    const llvm::Value* LHS,
    const llvm::Value* RHS,
    const llvm::Instruction* CxtI) const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:778

Parameters

const llvm::Value* LHS

const llvm::Value* RHS

const llvm::Instruction* CxtI

¶bool dominatesAllUses(
    const llvm::Instruction* DI,
    const llvm::Instruction* UI,
    const llvm::BasicBlock* DB) const

Description

True when DB dominates all uses of DI except UI. UI must be in the same block as DI. The routine checks that the DI parent and DB are different.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:458

Parameters

const llvm::Instruction* DI

const llvm::Instruction* UI

const llvm::BasicBlock* DB

¶llvm::Instruction* eraseInstFromFunction(
    llvm::Instruction& I)

Description

Combiner aware instruction erasure. When dealing with an instruction that has side effects or produces a void value, we can't rely on DCE to delete the instruction. Instead, visit methods should return the value returned by this function.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:710

Parameters

llvm::Instruction& I

¶llvm::Instruction*
foldVariableSignZeroExtensionOfVariableHighBitExtract(
    llvm::BinaryOperator& OldAShr)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:399

Parameters

llvm::BinaryOperator& OldAShr

¶llvm::AssumptionCache& getAssumptionCache() const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:352

¶const llvm::DataLayout& getDataLayout() const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:354

¶llvm::DominatorTree& getDominatorTree() const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:356

¶llvm::LoopInfo* getLoopInfo() const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:358

¶llvm::TargetLibraryInfo& getTargetLibraryInfo()
    const

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:360

¶bool isKnownToBeAPowerOfTwo(
    const llvm::Value* V,
    bool OrZero = false,
    unsigned int Depth = 0,
    const llvm::Instruction* CxtI = nullptr)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:738

Parameters

const llvm::Value* V

bool OrZero = false

unsigned int Depth = 0

const llvm::Instruction* CxtI = nullptr

¶llvm::Value*
reassociateShiftAmtsOfTwoSameDirectionShifts(
    llvm::BinaryOperator* Sh0,
    const llvm::SimplifyQuery& SQ,
    bool AnalyzeForSignBitExtraction = false)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:394

Parameters

llvm::BinaryOperator* Sh0

const llvm::SimplifyQuery& SQ

bool AnalyzeForSignBitExtraction = false

¶llvm::Instruction* replaceInstUsesWith(
    llvm::Instruction& I,
    llvm::Value* V)

Description

A combiner-aware RAUW-like routine. This method is to be used when an instruction is found to be dead, replaceable with another preexisting expression. Here we add all uses of I to the worklist, replace all uses of I with the new value, then return I, so that the inst combiner will know that I was modified.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:666

Parameters

llvm::Instruction& I

llvm::Value* V

¶bool replacePointer(llvm::Instruction& I,
                    llvm::Value* V)

Description

Try to replace instruction \p I with value \p V which are pointers in different address space.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:468

Parameters

llvm::Instruction& I

llvm::Value* V

Returns

true if successful.

¶bool replacedSelectWithOperand(
    llvm::SelectInst* SI,
    const llvm::ICmpInst* Icmp,
    const unsigned int SIOpd)

Description

Try to replace select with select operand SIOpd in SI-ICmp sequence.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:462

Parameters

llvm::SelectInst* SI

const llvm::ICmpInst* Icmp

const unsigned int SIOpd

¶bool run()

Description

Run the combiner over the entire worklist until it is empty.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:350

Returns

true if the IR is changed.

¶bool simplifyDivRemOfSelectWithZeroOp(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:381

Parameters

llvm::BinaryOperator& I

¶llvm::Value* simplifyRangeCheck(
    llvm::ICmpInst* Cmp0,
    llvm::ICmpInst* Cmp1,
    bool Inverted)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:389

Parameters

llvm::ICmpInst* Cmp0

llvm::ICmpInst* Cmp1

bool Inverted

¶llvm::Instruction* visitAShr(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:401

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitAdd(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:370

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitAddrSpaceCast(
    llvm::AddrSpaceCastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:422

Parameters

llvm::AddrSpaceCastInst& CI

¶llvm::Instruction* visitAllocSite(
    llvm::Instruction& FI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:433

Parameters

llvm::Instruction& FI

¶llvm::Instruction* visitAllocaInst(
    llvm::AllocaInst& AI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:432

Parameters

llvm::AllocaInst& AI

¶llvm::Instruction* visitAnd(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:390

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitAtomicRMWInst(
    llvm::AtomicRMWInst& SI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:437

Parameters

llvm::AtomicRMWInst& SI

¶llvm::Instruction* visitBitCast(
    llvm::BitCastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:421

Parameters

llvm::BitCastInst& CI

¶llvm::Instruction* visitBranchInst(
    llvm::BranchInst& BI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:438

Parameters

llvm::BranchInst& BI

¶llvm::Instruction* visitCallBrInst(
    llvm::CallBrInst& CBI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:427

Parameters

llvm::CallBrInst& CBI

¶llvm::Instruction* visitCallInst(
    llvm::CallInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:425

Parameters

llvm::CallInst& CI

¶llvm::Instruction* visitExtractElementInst(
    llvm::ExtractElementInst& EI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:444

Parameters

llvm::ExtractElementInst& EI

¶llvm::Instruction* visitExtractValueInst(
    llvm::ExtractValueInst& EV)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:446

Parameters

llvm::ExtractValueInst& EV

¶llvm::Instruction* visitFAdd(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:371

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitFCmpInst(
    llvm::FCmpInst& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:404

Parameters

llvm::FCmpInst& I

¶llvm::Instruction* visitFDiv(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:388

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitFMul(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:377

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitFNeg(
    llvm::UnaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:369

Parameters

llvm::UnaryOperator& I

¶llvm::Instruction* visitFPExt(llvm::CastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:414

Parameters

llvm::CastInst& CI

¶llvm::Instruction* visitFPToSI(
    llvm::FPToSIInst& FI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:416

Parameters

llvm::FPToSIInst& FI

¶llvm::Instruction* visitFPToUI(
    llvm::FPToUIInst& FI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:415

Parameters

llvm::FPToUIInst& FI

¶llvm::Instruction* visitFPTrunc(
    llvm::FPTruncInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:413

Parameters

llvm::FPTruncInst& CI

¶llvm::Instruction* visitFRem(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:380

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitFSub(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:375

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitFenceInst(
    llvm::FenceInst& FI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:439

Parameters

llvm::FenceInst& FI

¶llvm::Instruction* visitFree(llvm::CallInst& FI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:434

Parameters

llvm::CallInst& FI

¶llvm::Instruction* visitFreeze(
    llvm::FreezeInst& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:450

Parameters

llvm::FreezeInst& I

¶llvm::Instruction* visitGetElementPtrInst(
    llvm::GetElementPtrInst& GEP)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:431

Parameters

llvm::GetElementPtrInst& GEP

¶llvm::Instruction* visitICmpInst(
    llvm::ICmpInst& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:405

Parameters

llvm::ICmpInst& I

¶llvm::Instruction* visitInsertElementInst(
    llvm::InsertElementInst& IE)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:443

Parameters

llvm::InsertElementInst& IE

¶llvm::Instruction* visitInsertValueInst(
    llvm::InsertValueInst& IV)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:442

Parameters

llvm::InsertValueInst& IV

¶llvm::Instruction* visitInstruction(
    llvm::Instruction& I)

Description

Specify what to return for unhandled instructions.

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:453

Parameters

llvm::Instruction& I

¶llvm::Instruction* visitIntToPtr(
    llvm::IntToPtrInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:420

Parameters

llvm::IntToPtrInst& CI

¶llvm::Instruction* visitInvokeInst(
    llvm::InvokeInst& II)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:426

Parameters

llvm::InvokeInst& II

¶llvm::Instruction* visitLShr(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:402

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitLandingPadInst(
    llvm::LandingPadInst& LI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:447

Parameters

llvm::LandingPadInst& LI

¶llvm::Instruction* visitLoadInst(
    llvm::LoadInst& LI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:435

Parameters

llvm::LoadInst& LI

¶llvm::Instruction* visitMul(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:376

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitOr(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:391

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitPHINode(llvm::PHINode& PN)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:430

Parameters

llvm::PHINode& PN

¶llvm::Instruction* visitPtrToInt(
    llvm::PtrToIntInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:419

Parameters

llvm::PtrToIntInst& CI

¶llvm::Instruction* visitReturnInst(
    llvm::ReturnInst& RI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:441

Parameters

llvm::ReturnInst& RI

¶llvm::Instruction* visitSDiv(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:387

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitSExt(llvm::SExtInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:412

Parameters

llvm::SExtInst& CI

¶llvm::Instruction* visitSIToFP(llvm::CastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:418

Parameters

llvm::CastInst& CI

¶llvm::Instruction* visitSRem(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:379

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitSelectInst(
    llvm::SelectInst& SI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:424

Parameters

llvm::SelectInst& SI

¶llvm::Instruction* visitShl(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:393

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitShuffleVectorInst(
    llvm::ShuffleVectorInst& SVI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:445

Parameters

llvm::ShuffleVectorInst& SVI

¶llvm::Instruction* visitStoreInst(
    llvm::StoreInst& SI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:436

Parameters

llvm::StoreInst& SI

¶llvm::Instruction* visitSub(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:374

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitSwitchInst(
    llvm::SwitchInst& SI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:440

Parameters

llvm::SwitchInst& SI

¶llvm::Instruction* visitTrunc(llvm::TruncInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:410

Parameters

llvm::TruncInst& CI

¶llvm::Instruction* visitUDiv(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:386

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitUIToFP(llvm::CastInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:417

Parameters

llvm::CastInst& CI

¶llvm::Instruction* visitURem(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:378

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitVACopyInst(
    llvm::VACopyInst& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:449

Parameters

llvm::VACopyInst& I

¶llvm::Instruction* visitVAStartInst(
    llvm::VAStartInst& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:448

Parameters

llvm::VAStartInst& I

¶llvm::Instruction* visitXor(
    llvm::BinaryOperator& I)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:392

Parameters

llvm::BinaryOperator& I

¶llvm::Instruction* visitZExt(llvm::ZExtInst& CI)

Declared at: llvm/lib/Transforms/InstCombine/InstCombineInternal.h:411

Parameters

llvm::ZExtInst& CI