#include "llvm/CodeGen/GlobalISel/CombinerHelper.h"

Collaboration diagram for llvm::CombinerHelper:

[legend]

Public Member Functions
	CombinerHelper (GISelChangeObserver &Observer, MachineIRBuilder &B, GISelKnownBits KB=nullptr, MachineDominatorTree MDT=nullptr, const LegalizerInfo *LI=nullptr)

GISelKnownBits *	getKnownBits () const

const TargetLowering &	getTargetLowering () const

bool	isLegalOrBeforeLegalizer (const LegalityQuery &Query) const

void	replaceRegWith (MachineRegisterInfo &MRI, Register FromReg, Register ToReg) const
	MachineRegisterInfo::replaceRegWith() and inform the observer of the changes. More...

void	replaceRegOpWith (MachineRegisterInfo &MRI, MachineOperand &FromRegOp, Register ToReg) const
	Replace a single register operand with a new register and inform the observer of the changes. More...

const RegisterBank *	getRegBank (Register Reg) const
	Get the register bank of `Reg`. More...

void	setRegBank (Register Reg, const RegisterBank *RegBank)
	Set the register bank of `Reg`. More...

bool	tryCombineCopy (MachineInstr &MI)
	If `MI` is COPY, try to combine it. More...

bool	matchCombineCopy (MachineInstr &MI)

void	applyCombineCopy (MachineInstr &MI)

bool	isPredecessor (const MachineInstr &DefMI, const MachineInstr &UseMI)
	Returns true if `DefMI` precedes `UseMI` or they are the same instruction. More...

bool	dominates (const MachineInstr &DefMI, const MachineInstr &UseMI)
	Returns true if `DefMI` dominates `UseMI`. More...

bool	tryCombineExtendingLoads (MachineInstr &MI)
	If `MI` is extend that consumes the result of a load, try to combine it. More...

bool	matchCombineExtendingLoads (MachineInstr &MI, PreferredTuple &MatchInfo)

void	applyCombineExtendingLoads (MachineInstr &MI, PreferredTuple &MatchInfo)

bool	matchCombineLoadWithAndMask (MachineInstr &MI, BuildFnTy &MatchInfo)
	Match (and (load x), mask) -> zextload x. More...

bool	tryCombineIndexedLoadStore (MachineInstr &MI)
	Combine `MI` into a pre-indexed or post-indexed load/store operation if legal and the surrounding code makes it useful. More...

bool	matchCombineIndexedLoadStore (MachineInstr &MI, IndexedLoadStoreMatchInfo &MatchInfo)

void	applyCombineIndexedLoadStore (MachineInstr &MI, IndexedLoadStoreMatchInfo &MatchInfo)

bool	matchSextTruncSextLoad (MachineInstr &MI)

void	applySextTruncSextLoad (MachineInstr &MI)

bool	matchSextInRegOfLoad (MachineInstr &MI, std::tuple< Register, unsigned > &MatchInfo)
	Match sext_inreg(load p), imm -> sextload p. More...

void	applySextInRegOfLoad (MachineInstr &MI, std::tuple< Register, unsigned > &MatchInfo)

bool	matchCombineDivRem (MachineInstr &MI, MachineInstr *&OtherMI)
	Try to combine G_[SU]DIV and G_[SU]REM into a single G_[SU]DIVREM when their source operands are identical. More...

void	applyCombineDivRem (MachineInstr &MI, MachineInstr *&OtherMI)

bool	matchOptBrCondByInvertingCond (MachineInstr &MI, MachineInstr *&BrCond)
	If a brcond's true block is not the fallthrough, make it so by inverting the condition and swapping operands. More...

void	applyOptBrCondByInvertingCond (MachineInstr &MI, MachineInstr *&BrCond)

bool	tryCombineConcatVectors (MachineInstr &MI)
	If `MI` is G_CONCAT_VECTORS, try to combine it. More...

bool	matchCombineConcatVectors (MachineInstr &MI, bool &IsUndef, SmallVectorImpl< Register > &Ops)
	Check if the G_CONCAT_VECTORS `MI` is undef or if it can be flattened into a build_vector. More...

void	applyCombineConcatVectors (MachineInstr &MI, bool IsUndef, const ArrayRef< Register > Ops)
	Replace `MI` with a flattened build_vector with `Ops` or an implicit_def if IsUndef is true. More...

bool	tryCombineShuffleVector (MachineInstr &MI)
	Try to combine G_SHUFFLE_VECTOR into G_CONCAT_VECTORS. More...

bool	matchCombineShuffleVector (MachineInstr &MI, SmallVectorImpl< Register > &Ops)
	Check if the G_SHUFFLE_VECTOR `MI` can be replaced by a concat_vectors. More...

void	applyCombineShuffleVector (MachineInstr &MI, const ArrayRef< Register > Ops)
	Replace `MI` with a concat_vectors with `Ops`. More...

bool	tryCombineMemCpyFamily (MachineInstr &MI, unsigned MaxLen=0)
	Optimize memcpy intrinsics et al, e.g. More...

bool	matchPtrAddImmedChain (MachineInstr &MI, PtrAddChain &MatchInfo)

void	applyPtrAddImmedChain (MachineInstr &MI, PtrAddChain &MatchInfo)

bool	matchShiftImmedChain (MachineInstr &MI, RegisterImmPair &MatchInfo)
	Fold (shift (shift base, x), y) -> (shift base (x+y)) More...

void	applyShiftImmedChain (MachineInstr &MI, RegisterImmPair &MatchInfo)

bool	matchShiftOfShiftedLogic (MachineInstr &MI, ShiftOfShiftedLogic &MatchInfo)
	If we have a shift-by-constant of a bitwise logic op that itself has a shift-by-constant operand with identical opcode, we may be able to convert that into 2 independent shifts followed by the logic op. More...

void	applyShiftOfShiftedLogic (MachineInstr &MI, ShiftOfShiftedLogic &MatchInfo)

bool	matchCombineMulToShl (MachineInstr &MI, unsigned &ShiftVal)
	Transform a multiply by a power-of-2 value to a left shift. More...

void	applyCombineMulToShl (MachineInstr &MI, unsigned &ShiftVal)

bool	matchCombineShlOfExtend (MachineInstr &MI, RegisterImmPair &MatchData)

void	applyCombineShlOfExtend (MachineInstr &MI, const RegisterImmPair &MatchData)

bool	matchCombineMergeUnmerge (MachineInstr &MI, Register &MatchInfo)
	Fold away a merge of an unmerge of the corresponding values. More...

bool	matchCombineShiftToUnmerge (MachineInstr &MI, unsigned TargetShiftSize, unsigned &ShiftVal)
	Reduce a shift by a constant to an unmerge and a shift on a half sized type. More...

void	applyCombineShiftToUnmerge (MachineInstr &MI, const unsigned &ShiftVal)

bool	tryCombineShiftToUnmerge (MachineInstr &MI, unsigned TargetShiftAmount)

bool	matchCombineUnmergeMergeToPlainValues (MachineInstr &MI, SmallVectorImpl< Register > &Operands)
	Transform <ty,...> G_UNMERGE(G_MERGE ty X, Y, Z) -> ty X, Y, Z. More...

void	applyCombineUnmergeMergeToPlainValues (MachineInstr &MI, SmallVectorImpl< Register > &Operands)

bool	matchCombineUnmergeConstant (MachineInstr &MI, SmallVectorImpl< APInt > &Csts)
	Transform G_UNMERGE Constant -> Constant1, Constant2, ... More...

void	applyCombineUnmergeConstant (MachineInstr &MI, SmallVectorImpl< APInt > &Csts)

bool	matchCombineUnmergeWithDeadLanesToTrunc (MachineInstr &MI)
	Transform X, Y<dead> = G_UNMERGE Z -> X = G_TRUNC Z. More...

void	applyCombineUnmergeWithDeadLanesToTrunc (MachineInstr &MI)

bool	matchCombineUnmergeZExtToZExt (MachineInstr &MI)
	Transform X, Y = G_UNMERGE(G_ZEXT(Z)) -> X = G_ZEXT(Z); Y = G_CONSTANT 0. More...

void	applyCombineUnmergeZExtToZExt (MachineInstr &MI)

bool	matchCombineConstantFoldFpUnary (MachineInstr &MI, Optional< APFloat > &Cst)
	Transform fp_instr(cst) to constant result of the fp operation. More...

void	applyCombineConstantFoldFpUnary (MachineInstr &MI, Optional< APFloat > &Cst)

bool	matchCombineI2PToP2I (MachineInstr &MI, Register &Reg)
	Transform IntToPtr(PtrToInt(x)) to x if cast is in the same address space. More...

void	applyCombineI2PToP2I (MachineInstr &MI, Register &Reg)

bool	matchCombineP2IToI2P (MachineInstr &MI, Register &Reg)
	Transform PtrToInt(IntToPtr(x)) to x. More...

void	applyCombineP2IToI2P (MachineInstr &MI, Register &Reg)

bool	matchCombineAddP2IToPtrAdd (MachineInstr &MI, std::pair< Register, bool > &PtrRegAndCommute)
	Transform G_ADD (G_PTRTOINT x), y -> G_PTRTOINT (G_PTR_ADD x, y) Transform G_ADD y, (G_PTRTOINT x) -> G_PTRTOINT (G_PTR_ADD x, y) More...

void	applyCombineAddP2IToPtrAdd (MachineInstr &MI, std::pair< Register, bool > &PtrRegAndCommute)

bool	matchCombineConstPtrAddToI2P (MachineInstr &MI, int64_t &NewCst)

void	applyCombineConstPtrAddToI2P (MachineInstr &MI, int64_t &NewCst)

bool	matchCombineAnyExtTrunc (MachineInstr &MI, Register &Reg)
	Transform anyext(trunc(x)) to x. More...

void	applyCombineAnyExtTrunc (MachineInstr &MI, Register &Reg)

bool	matchCombineZextTrunc (MachineInstr &MI, Register &Reg)
	Transform zext(trunc(x)) to x. More...

bool	matchCombineExtOfExt (MachineInstr &MI, std::tuple< Register, unsigned > &MatchInfo)
	Transform [asz]ext([asz]ext(x)) to [asz]ext x. More...

void	applyCombineExtOfExt (MachineInstr &MI, std::tuple< Register, unsigned > &MatchInfo)

bool	matchCombineFNegOfFNeg (MachineInstr &MI, Register &Reg)
	Transform fneg(fneg(x)) to x. More...

bool	matchCombineFAbsOfFAbs (MachineInstr &MI, Register &Src)
	Match fabs(fabs(x)) to fabs(x). More...

void	applyCombineFAbsOfFAbs (MachineInstr &MI, Register &Src)

bool	matchCombineTruncOfExt (MachineInstr &MI, std::pair< Register, unsigned > &MatchInfo)
	Transform trunc ([asz]ext x) to x or ([asz]ext x) or (trunc x). More...

void	applyCombineTruncOfExt (MachineInstr &MI, std::pair< Register, unsigned > &MatchInfo)

bool	matchCombineTruncOfShl (MachineInstr &MI, std::pair< Register, Register > &MatchInfo)
	Transform trunc (shl x, K) to shl (trunc x), K => K < VT.getScalarSizeInBits(). More...

void	applyCombineTruncOfShl (MachineInstr &MI, std::pair< Register, Register > &MatchInfo)

void	applyCombineMulByNegativeOne (MachineInstr &MI)
	Transform G_MUL(x, -1) to G_SUB(0, x) More...

bool	matchAnyExplicitUseIsUndef (MachineInstr &MI)
	Return true if any explicit use operand on `MI` is defined by a G_IMPLICIT_DEF. More...

bool	matchAllExplicitUsesAreUndef (MachineInstr &MI)
	Return true if all register explicit use operands on `MI` are defined by a G_IMPLICIT_DEF. More...

bool	matchUndefShuffleVectorMask (MachineInstr &MI)
	Return true if a G_SHUFFLE_VECTOR instruction `MI` has an undef mask. More...

bool	matchUndefStore (MachineInstr &MI)
	Return true if a G_STORE instruction `MI` is storing an undef value. More...

bool	matchUndefSelectCmp (MachineInstr &MI)
	Return true if a G_SELECT instruction `MI` has an undef comparison. More...

bool	matchConstantSelectCmp (MachineInstr &MI, unsigned &OpIdx)
	Return true if a G_SELECT instruction `MI` has a constant comparison. More...

bool	replaceInstWithFConstant (MachineInstr &MI, double C)
	Replace an instruction with a G_FCONSTANT with value `C`. More...

bool	replaceInstWithConstant (MachineInstr &MI, int64_t C)
	Replace an instruction with a G_CONSTANT with value `C`. More...

bool	replaceInstWithConstant (MachineInstr &MI, APInt C)
	Replace an instruction with a G_CONSTANT with value `C`. More...

bool	replaceInstWithUndef (MachineInstr &MI)
	Replace an instruction with a G_IMPLICIT_DEF. More...

bool	replaceSingleDefInstWithOperand (MachineInstr &MI, unsigned OpIdx)
	Delete `MI` and replace all of its uses with its `OpIdx-th` operand. More...

bool	replaceSingleDefInstWithReg (MachineInstr &MI, Register Replacement)
	Delete `MI` and replace all of its uses with `Replacement`. More...

bool	matchEqualDefs (const MachineOperand &MOP1, const MachineOperand &MOP2)
	Return true if `MOP1` and `MOP2` are register operands are defined by equivalent instructions. More...

bool	matchConstantOp (const MachineOperand &MOP, int64_t C)
	Return true if `MOP` is defined by a G_CONSTANT with a value equal to `C`. More...

bool	matchSelectSameVal (MachineInstr &MI)
	Optimize (cond ? x : x) -> x. More...

bool	matchBinOpSameVal (MachineInstr &MI)
	Optimize (x op x) -> x. More...

bool	matchOperandIsZero (MachineInstr &MI, unsigned OpIdx)
	Check if operand `OpIdx` is zero. More...

bool	matchOperandIsUndef (MachineInstr &MI, unsigned OpIdx)
	Check if operand `OpIdx` is undef. More...

bool	matchOperandIsKnownToBeAPowerOfTwo (MachineInstr &MI, unsigned OpIdx)
	Check if operand `OpIdx` is known to be a power of 2. More...

bool	eraseInst (MachineInstr &MI)
	Erase `MI`. More...

bool	matchSimplifyAddToSub (MachineInstr &MI, std::tuple< Register, Register > &MatchInfo)
	Return true if MI is a G_ADD which can be simplified to a G_SUB. More...

void	applySimplifyAddToSub (MachineInstr &MI, std::tuple< Register, Register > &MatchInfo)

bool	matchHoistLogicOpWithSameOpcodeHands (MachineInstr &MI, InstructionStepsMatchInfo &MatchInfo)
	Match (logic_op (op x...), (op y...)) -> (op (logic_op x, y)) More...

void	applyBuildInstructionSteps (MachineInstr &MI, InstructionStepsMatchInfo &MatchInfo)
	Replace `MI` with a series of instructions described in `MatchInfo`. More...

bool	matchAshrShlToSextInreg (MachineInstr &MI, std::tuple< Register, int64_t > &MatchInfo)
	Match ashr (shl x, C), C -> sext_inreg (C) More...

void	applyAshShlToSextInreg (MachineInstr &MI, std::tuple< Register, int64_t > &MatchInfo)

bool	matchOverlappingAnd (MachineInstr &MI, BuildFnTy &MatchInfo)
	Fold and(and(x, C1), C2) -> C1&C2 ? and(x, C1&C2) : 0. More...

bool	matchRedundantAnd (MachineInstr &MI, Register &Replacement)

bool	matchRedundantOr (MachineInstr &MI, Register &Replacement)

bool	matchRedundantSExtInReg (MachineInstr &MI)

bool	matchNotCmp (MachineInstr &MI, SmallVectorImpl< Register > &RegsToNegate)
	Combine inverting a result of a compare into the opposite cond code. More...

void	applyNotCmp (MachineInstr &MI, SmallVectorImpl< Register > &RegsToNegate)

bool	matchXorOfAndWithSameReg (MachineInstr &MI, std::pair< Register, Register > &MatchInfo)
	Fold (xor (and x, y), y) -> (and (not x), y) {. More...

void	applyXorOfAndWithSameReg (MachineInstr &MI, std::pair< Register, Register > &MatchInfo)

bool	matchPtrAddZero (MachineInstr &MI)
	} More...

void	applyPtrAddZero (MachineInstr &MI)

void	applySimplifyURemByPow2 (MachineInstr &MI)
	Combine G_UREM x, (known power of 2) to an add and bitmasking. More...

bool	matchCombineInsertVecElts (MachineInstr &MI, SmallVectorImpl< Register > &MatchInfo)

void	applyCombineInsertVecElts (MachineInstr &MI, SmallVectorImpl< Register > &MatchInfo)

bool	matchLoadOrCombine (MachineInstr &MI, BuildFnTy &MatchInfo)
	Match expression trees of the form. More...

bool	matchTruncStoreMerge (MachineInstr &MI, MergeTruncStoresInfo &MatchInfo)
	Match a pattern where a wide type scalar value is stored by several narrow stores. More...

void	applyTruncStoreMerge (MachineInstr &MI, MergeTruncStoresInfo &MatchInfo)

bool	matchExtendThroughPhis (MachineInstr &MI, MachineInstr *&ExtMI)

void	applyExtendThroughPhis (MachineInstr &MI, MachineInstr *&ExtMI)

bool	matchExtractVecEltBuildVec (MachineInstr &MI, Register &Reg)

void	applyExtractVecEltBuildVec (MachineInstr &MI, Register &Reg)

bool	matchExtractAllEltsFromBuildVector (MachineInstr &MI, SmallVectorImpl< std::pair< Register, MachineInstr * >> &MatchInfo)

void	applyExtractAllEltsFromBuildVector (MachineInstr &MI, SmallVectorImpl< std::pair< Register, MachineInstr * >> &MatchInfo)

void	applyBuildFn (MachineInstr &MI, BuildFnTy &MatchInfo)
	Use a function which takes in a MachineIRBuilder to perform a combine. More...

void	applyBuildFnNoErase (MachineInstr &MI, BuildFnTy &MatchInfo)
	Use a function which takes in a MachineIRBuilder to perform a combine. More...

bool	matchFunnelShiftToRotate (MachineInstr &MI)
	Match an FSHL or FSHR that can be combined to a ROTR or ROTL rotate. More...

void	applyFunnelShiftToRotate (MachineInstr &MI)

bool	matchRotateOutOfRange (MachineInstr &MI)

void	applyRotateOutOfRange (MachineInstr &MI)

bool	matchICmpToTrueFalseKnownBits (MachineInstr &MI, int64_t &MatchInfo)

bool	matchICmpToLHSKnownBits (MachineInstr &MI, BuildFnTy &MatchInfo)

bool	matchBitfieldExtractFromSExtInReg (MachineInstr &MI, BuildFnTy &MatchInfo)
	Form a G_SBFX from a G_SEXT_INREG fed by a right shift. More...

bool	matchBitfieldExtractFromAnd (MachineInstr &MI, BuildFnTy &MatchInfo)
	Match: and (lshr x, cst), mask -> ubfx x, cst, width. More...

bool	matchBitfieldExtractFromShr (MachineInstr &MI, BuildFnTy &MatchInfo)
	Match: shr (shl x, n), k -> sbfx/ubfx x, pos, width. More...

bool	matchReassocConstantInnerRHS (GPtrAdd &MI, MachineInstr *RHS, BuildFnTy &MatchInfo)

bool	matchReassocFoldConstantsInSubTree (GPtrAdd &MI, MachineInstr LHS, MachineInstr RHS, BuildFnTy &MatchInfo)

bool	matchReassocConstantInnerLHS (GPtrAdd &MI, MachineInstr LHS, MachineInstr RHS, BuildFnTy &MatchInfo)

bool	matchReassocPtrAdd (MachineInstr &MI, BuildFnTy &MatchInfo)
	Reassociate pointer calculations with G_ADD involved, to allow better addressing mode usage. More...

bool	matchConstantFold (MachineInstr &MI, APInt &MatchInfo)
	Do constant folding when opportunities are exposed after MIR building. More...

bool	matchNarrowBinopFeedingAnd (MachineInstr &MI, BuildFnTy &MatchInfo)

bool	tryCombine (MachineInstr &MI)
	Try to transform `MI` by using all of the above combine functions. More...

bool	tryEmitMemcpyInline (MachineInstr &MI)
	Emit loads and stores that perform the given memcpy. More...

Protected Attributes
MachineIRBuilder &	Builder

MachineRegisterInfo &	MRI

GISelChangeObserver &	Observer

GISelKnownBits *	KB

MachineDominatorTree *	MDT

const LegalizerInfo *	LI

const RegisterBankInfo *	RBI

const TargetRegisterInfo *	TRI

Detailed Description

Definition at line 104 of file CombinerHelper.h.

Constructor & Destructor Documentation

◆ CombinerHelper()

CombinerHelper::CombinerHelper	(	GISelChangeObserver &	Observer,
		MachineIRBuilder &	B,
		GISelKnownBits *	KB = `nullptr`,
		MachineDominatorTree *	MDT = `nullptr`,
		const LegalizerInfo *	LI = `nullptr`
	)

Definition at line 48 of file CombinerHelper.cpp.

Member Function Documentation

◆ applyAshShlToSextInreg()

void CombinerHelper::applyAshShlToSextInreg	(	MachineInstr &	MI,
		std::tuple< Register, int64_t > &	MatchInfo
	)

Definition at line 2646 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildSExtInReg(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), MI, MRI, llvm::MachineIRBuilder::setInstrAndDebugLoc(), and llvm::Check::Size.

◆ applyBuildFn()

void CombinerHelper::applyBuildFn	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Use a function which takes in a MachineIRBuilder to perform a combine.

By default, it erases the instruction MI from the function.

Definition at line 3817 of file CombinerHelper.cpp.

References Builder, MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyBuildFnNoErase()

void CombinerHelper::applyBuildFnNoErase	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Use a function which takes in a MachineIRBuilder to perform a combine.

This variant does not erase MI after calling the build function.

Definition at line 3824 of file CombinerHelper.cpp.

References Builder, MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyBuildInstructionSteps()

void CombinerHelper::applyBuildInstructionSteps	(	MachineInstr &	MI,
		InstructionStepsMatchInfo &	MatchInfo
	)

Replace MI with a series of instructions described in MatchInfo.

Definition at line 2613 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildInstr(), llvm::InstructionStepsMatchInfo::InstrsToBuild, MI, and llvm::MachineIRBuilder::setInstr().

◆ applyCombineAddP2IToPtrAdd()

void CombinerHelper::applyCombineAddP2IToPtrAdd	(	MachineInstr &	MI,
		std::pair< Register, bool > &	PtrRegAndCommute
	)

Definition at line 1987 of file CombinerHelper.cpp.

References Builder, llvm::MachineIRBuilder::buildPtrAdd(), llvm::MachineIRBuilder::buildPtrToInt(), llvm::MachineRegisterInfo::getType(), MI, MRI, llvm::MachineIRBuilder::setInstrAndDebugLoc(), and std::swap().

◆ applyCombineAnyExtTrunc()

void llvm::CombinerHelper::applyCombineAnyExtTrunc	(	MachineInstr &	MI,
		Register &	Reg
	)

◆ applyCombineConcatVectors()

void CombinerHelper::applyCombineConcatVectors	(	MachineInstr &	MI,
		bool	IsUndef,
		const ArrayRef< Register >	Ops
	)

Replace MI with a flattened build_vector with Ops or an implicit_def if IsUndef is true.

Definition at line 235 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildBuildVector(), Builder, llvm::MachineIRBuilder::buildUndef(), llvm::MachineRegisterInfo::cloneVirtualRegister(), MI, MRI, replaceRegWith(), and llvm::MachineIRBuilder::setInsertPt().

Referenced by tryCombineConcatVectors().

◆ applyCombineConstantFoldFpUnary()

void CombinerHelper::applyCombineConstantFoldFpUnary	(	MachineInstr &	MI,
		Optional< APFloat > &	Cst
	)

Definition at line 1260 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildFConstant(), llvm::ConstantFP::get(), llvm::Function::getContext(), llvm::MachineFunction::getFunction(), llvm::MachineIRBuilder::getMF(), llvm::Optional< T >::hasValue(), MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineConstPtrAddToI2P()

void CombinerHelper::applyCombineConstPtrAddToI2P	(	MachineInstr &	MI,
		int64_t &	NewCst
	)

Definition at line 2024 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildConstant(), Builder, MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineCopy()

void CombinerHelper::applyCombineCopy ( MachineInstr & MI )

Definition at line 173 of file CombinerHelper.cpp.

References MI, MRI, and replaceRegWith().

Referenced by tryCombineCopy().

◆ applyCombineDivRem()

void CombinerHelper::applyCombineDivRem	(	MachineInstr &	MI,
		MachineInstr *&	OtherMI
	)

Definition at line 1095 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildInstr(), dominates(), llvm::MachineInstr::eraseFromParent(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), getReg(), MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineExtendingLoads()

void CombinerHelper::applyCombineExtendingLoads	(	MachineInstr &	MI,
		PreferredTuple &	MatchInfo
	)

rewrites to:

Definition at line 526 of file CombinerHelper.cpp.

References Builder, llvm::MachineIRBuilder::buildTrunc(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MachineRegisterInfo::cloneVirtualRegister(), llvm::MachineInstr::eraseFromParent(), llvm::GISelChangeObserver::erasingInstr(), llvm::PreferredTuple::ExtendOpcode, llvm::MCInstrInfo::get(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getParent(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), llvm::MachineIRBuilder::getTII(), llvm::MachineRegisterInfo::getType(), llvm::DenseMapBase< DenseMap< KeyT, ValueT, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >, KeyT, ValueT, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >::lookup(), llvm::PreferredTuple::MI, MI, MRI, Observer, replaceRegOpWith(), replaceRegWith(), llvm::MachineIRBuilder::setInsertPt(), llvm::MachineOperand::setReg(), llvm::PreferredTuple::Ty, llvm::MachineRegisterInfo::use_operands(), UseMI, and Uses.

Referenced by tryCombineExtendingLoads().

◆ applyCombineExtOfExt()

void CombinerHelper::applyCombineExtOfExt	(	MachineInstr &	MI,
		std::tuple< Register, unsigned > &	MatchInfo
	)

Definition at line 2078 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildInstr(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), MI, Observer, Reg, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineFAbsOfFAbs()

void llvm::CombinerHelper::applyCombineFAbsOfFAbs	(	MachineInstr &	MI,
		Register &	Src
	)

◆ applyCombineI2PToP2I()

void CombinerHelper::applyCombineI2PToP2I	(	MachineInstr &	MI,
		Register &	Reg
	)

Definition at line 1940 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildCopy(), Builder, MI, Reg, and llvm::MachineIRBuilder::setInstr().

◆ applyCombineIndexedLoadStore()

void CombinerHelper::applyCombineIndexedLoadStore	(	MachineInstr &	MI,
		IndexedLoadStoreMatchInfo &	MatchInfo
	)

Definition at line 991 of file CombinerHelper.cpp.

References llvm::MachineInstrBuilder::addDef(), llvm::MachineInstrBuilder::addImm(), llvm::IndexedLoadStoreMatchInfo::Addr, llvm::MachineInstrBuilder::addUse(), llvm::IndexedLoadStoreMatchInfo::Base, llvm::MachineIRBuilder::buildInstr(), llvm::dbgs(), llvm::MachineInstr::eraseFromParent(), llvm::MachineRegisterInfo::getUniqueVRegDef(), llvm::IndexedLoadStoreMatchInfo::IsPre, LLVM_DEBUG, llvm_unreachable, MI, MRI, and llvm::IndexedLoadStoreMatchInfo::Offset.

Referenced by tryCombineIndexedLoadStore().

◆ applyCombineInsertVecElts()

void CombinerHelper::applyCombineInsertVecElts	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	MatchInfo
	)

Definition at line 2494 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildBuildVector(), Builder, llvm::MachineIRBuilder::buildUndef(), getReg(), llvm::LLT::getScalarType(), llvm::MachineRegisterInfo::getType(), I, MI, MRI, and llvm::MachineIRBuilder::setInstr().

◆ applyCombineMulByNegativeOne()

void CombinerHelper::applyCombineMulByNegativeOne ( MachineInstr & MI )

Transform G_MUL(x, -1) to G_SUB(0, x)

Definition at line 2109 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), Builder, llvm::MachineIRBuilder::buildSub(), llvm::MachineRegisterInfo::getType(), MI, MRI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineMulToShl()

void CombinerHelper::applyCombineMulToShl	(	MachineInstr &	MI,
		unsigned &	ShiftVal
	)

Definition at line 1551 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MCInstrInfo::get(), llvm::MachineIRBuilder::getTII(), llvm::MachineRegisterInfo::getType(), MI, MRI, and Observer.

◆ applyCombineP2IToI2P()

void CombinerHelper::applyCombineP2IToI2P	(	MachineInstr &	MI,
		Register &	Reg
	)

Definition at line 1954 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildZExtOrTrunc(), MI, Reg, and llvm::MachineIRBuilder::setInstr().

◆ applyCombineShiftToUnmerge()

void CombinerHelper::applyCombineShiftToUnmerge	(	MachineInstr &	MI,
		const unsigned &	ShiftVal
	)

◆ applyCombineShlOfExtend()

void CombinerHelper::applyCombineShlOfExtend	(	MachineInstr &	MI,
		const RegisterImmPair &	MatchData
	)

Definition at line 1601 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildConstant(), Builder, llvm::MachineIRBuilder::buildShl(), llvm::MachineIRBuilder::buildZExt(), llvm::MachineRegisterInfo::getType(), llvm::RegisterImmPair::Imm, MI, MRI, llvm::RegisterImmPair::Reg, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineShuffleVector()

void CombinerHelper::applyCombineShuffleVector	(	MachineInstr &	MI,
		const ArrayRef< Register >	Ops
	)

Replace MI with a concat_vectors with Ops.

Definition at line 342 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildCopy(), Builder, llvm::MachineIRBuilder::buildMerge(), llvm::MachineRegisterInfo::cloneVirtualRegister(), MI, MRI, replaceRegWith(), llvm::MachineIRBuilder::setInsertPt(), and llvm::ArrayRef< T >::size().

Referenced by tryCombineShuffleVector().

◆ applyCombineTruncOfExt()

void CombinerHelper::applyCombineTruncOfExt	(	MachineInstr &	MI,
		std::pair< Register, unsigned > &	MatchInfo
	)

Definition at line 2148 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildInstr(), llvm::MachineIRBuilder::buildTrunc(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), MI, MRI, replaceRegWith(), and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineTruncOfShl()

void CombinerHelper::applyCombineTruncOfShl	(	MachineInstr &	MI,
		std::pair< Register, Register > &	MatchInfo
	)

Definition at line 2193 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildShl(), llvm::MachineIRBuilder::buildTrunc(), llvm::MachineInstr::getFlags(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getVRegDef(), MI, MRI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineUnmergeConstant()

void CombinerHelper::applyCombineUnmergeConstant	(	MachineInstr &	MI,
		SmallVectorImpl< APInt > &	Csts
	)

Definition at line 1714 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), Builder, MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineUnmergeMergeToPlainValues()

void CombinerHelper::applyCombineUnmergeMergeToPlainValues	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	Operands
	)

Definition at line 1666 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildCast(), Builder, llvm::MachineRegisterInfo::getType(), MI, MRI, Operands, replaceRegWith(), and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineUnmergeWithDeadLanesToTrunc()

void CombinerHelper::applyCombineUnmergeWithDeadLanesToTrunc ( MachineInstr & MI )

Definition at line 1741 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildCast(), Builder, llvm::MachineIRBuilder::buildTrunc(), llvm::MachineInstrBuilder::getReg(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::LLT::isVector(), MI, MRI, llvm::LLT::scalar(), and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyCombineUnmergeZExtToZExt()

void CombinerHelper::applyCombineUnmergeZExtToZExt ( MachineInstr & MI )

Definition at line 1788 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), Builder, llvm::MachineIRBuilder::buildZExt(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineInstrBuilder::getReg(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getVRegDef(), MI, MRI, replaceRegWith(), and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyExtendThroughPhis()

void CombinerHelper::applyExtendThroughPhis	(	MachineInstr &	MI,
		MachineInstr *&	ExtMI
	)

◆ applyExtractAllEltsFromBuildVector()

void CombinerHelper::applyExtractAllEltsFromBuildVector	(	MachineInstr &	MI,
		SmallVectorImpl< std::pair< Register, MachineInstr * >> &	MatchInfo
	)

Definition at line 3805 of file CombinerHelper.cpp.

References assert(), MI, MRI, and replaceRegWith().

◆ applyExtractVecEltBuildVec()

void CombinerHelper::applyExtractVecEltBuildVec	(	MachineInstr &	MI,
		Register &	Reg
	)

Definition at line 3744 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildTrunc(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), MI, MRI, Reg, replaceSingleDefInstWithReg(), and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyFunnelShiftToRotate()

void CombinerHelper::applyFunnelShiftToRotate ( MachineInstr & MI )

Definition at line 3843 of file CombinerHelper.cpp.

References assert(), Builder, llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MCInstrInfo::get(), llvm::MachineIRBuilder::getTII(), MI, and Observer.

◆ applyNotCmp()

void CombinerHelper::applyNotCmp	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	RegsToNegate
	)

Definition at line 2878 of file CombinerHelper.cpp.

References Builder, llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::tgtok::Def, llvm::MCInstrInfo::get(), llvm::CmpInst::getInversePredicate(), llvm::MachineOperand::getPredicate(), llvm::MachineIRBuilder::getTII(), llvm::MachineRegisterInfo::getVRegDef(), llvm_unreachable, MI, MRI, Observer, Reg, replaceRegWith(), and llvm::MachineOperand::setPredicate().

◆ applyOptBrCondByInvertingCond()

void CombinerHelper::applyOptBrCondByInvertingCond	(	MachineInstr &	MI,
		MachineInstr *&	BrCond
	)

◆ applyPtrAddImmedChain()

void CombinerHelper::applyPtrAddImmedChain	(	MachineInstr &	MI,
		PtrAddChain &	MatchInfo
	)

Definition at line 1333 of file CombinerHelper.cpp.

References assert(), llvm::PtrAddChain::Bank, llvm::PtrAddChain::Base, llvm::MachineIRBuilder::buildConstant(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MachineRegisterInfo::getType(), llvm::PtrAddChain::Imm, MI, MRI, Observer, and setRegBank().

◆ applyPtrAddZero()

void CombinerHelper::applyPtrAddZero ( MachineInstr & MI )

Definition at line 2974 of file CombinerHelper.cpp.

References Builder, llvm::MachineIRBuilder::buildIntToPtr(), MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyRotateOutOfRange()

void CombinerHelper::applyRotateOutOfRange ( MachineInstr & MI )

Definition at line 3870 of file CombinerHelper.cpp.

References assert(), llvm::tgtok::Bits, llvm::MachineIRBuilder::buildConstant(), Builder, llvm::MachineIRBuilder::buildURem(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MachineInstrBuilder::getReg(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), MI, MRI, Observer, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applySextInRegOfLoad()

void CombinerHelper::applySextInRegOfLoad	(	MachineInstr &	MI,
		std::tuple< Register, unsigned > &	MatchInfo
	)

Definition at line 808 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildLoadInstr(), llvm::MachineFunction::getMachineMemOperand(), llvm::MachineIRBuilder::getMF(), llvm::GLoadStore::getMMO(), llvm::GLoadStore::getPointerReg(), llvm::MachineRegisterInfo::getVRegDef(), MI, MRI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applySextTruncSextLoad()

void CombinerHelper::applySextTruncSextLoad ( MachineInstr & MI )

Definition at line 760 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildCopy(), Builder, MI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyShiftImmedChain()

void CombinerHelper::applyShiftImmedChain	(	MachineInstr &	MI,
		RegisterImmPair &	MatchInfo
	)

Definition at line 1391 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), Builder, llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MachineInstrBuilder::getReg(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::RegisterImmPair::Imm, MI, MRI, Observer, llvm::RegisterImmPair::Reg, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyShiftOfShiftedLogic()

void CombinerHelper::applyShiftOfShiftedLogic	(	MachineInstr &	MI,
		ShiftOfShiftedLogic &	MatchInfo
	)

◆ applySimplifyAddToSub()

void CombinerHelper::applySimplifyAddToSub	(	MachineInstr &	MI,
		std::tuple< Register, Register > &	MatchInfo
	)

Definition at line 2513 of file CombinerHelper.cpp.

References Builder, llvm::MachineIRBuilder::buildSub(), MI, and llvm::MachineIRBuilder::setInstr().

◆ applySimplifyURemByPow2()

void CombinerHelper::applySimplifyURemByPow2 ( MachineInstr & MI )

Combine G_UREM x, (known power of 2) to an add and bitmasking.

The second source operand is known to be a power of 2.

Definition at line 2982 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::buildAdd(), llvm::MachineIRBuilder::buildAnd(), llvm::MachineIRBuilder::buildConstant(), Builder, llvm::MachineRegisterInfo::getType(), MI, MRI, and llvm::MachineIRBuilder::setInstrAndDebugLoc().

◆ applyTruncStoreMerge()

void CombinerHelper::applyTruncStoreMerge	(	MachineInstr &	MI,
		MergeTruncStoresInfo &	MatchInfo
	)

◆ applyXorOfAndWithSameReg()

void CombinerHelper::applyXorOfAndWithSameReg	(	MachineInstr &	MI,
		std::pair< Register, Register > &	MatchInfo
	)

Definition at line 2941 of file CombinerHelper.cpp.

References Builder, llvm::MachineIRBuilder::buildNot(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MCInstrInfo::get(), llvm::MachineIRBuilder::getTII(), llvm::MachineRegisterInfo::getType(), MI, MRI, Observer, llvm::MachineIRBuilder::setInstrAndDebugLoc(), X, and Y.

◆ dominates()

bool CombinerHelper::dominates	(	const MachineInstr &	DefMI,
		const MachineInstr &	UseMI
	)

Returns true if DefMI dominates UseMI.

By definition an instruction dominates itself.

If we haven't been provided with a MachineDominatorTree during construction, this function returns a conservative result that tracks just a single basic block.

Definition at line 722 of file CombinerHelper.cpp.

References assert(), DefMI, llvm::MachineDominatorTree::dominates(), isPredecessor(), MDT, and UseMI.

Referenced by applyCombineDivRem().

◆ eraseInst()

bool CombinerHelper::eraseInst ( MachineInstr & MI )

Erase MI.

Definition at line 2251 of file CombinerHelper.cpp.

References MI.

◆ getKnownBits()

GISelKnownBits* llvm::CombinerHelper::getKnownBits ( ) const

inline

Definition at line 121 of file CombinerHelper.h.

References KB.

◆ getRegBank()

const RegisterBank * CombinerHelper::getRegBank ( Register Reg ) const

Get the register bank of Reg.

If Reg has not been assigned a register, a register class, or a register bank, then this returns nullptr.

Precondition: Reg.isValid()

Definition at line 150 of file CombinerHelper.cpp.

References llvm::RegisterBankInfo::getRegBank(), MRI, RBI, Reg, and TRI.

Referenced by matchPtrAddImmedChain().

◆ getTargetLowering()

const TargetLowering & CombinerHelper::getTargetLowering ( ) const

Definition at line 58 of file CombinerHelper.cpp.

References Builder, llvm::MachineIRBuilder::getMF(), llvm::MachineFunction::getSubtarget(), and llvm::TargetSubtargetInfo::getTargetLowering().

Referenced by applyOptBrCondByInvertingCond(), matchBitfieldExtractFromAnd(), matchBitfieldExtractFromSExtInReg(), matchBitfieldExtractFromShr(), matchCombineShlOfExtend(), matchCombineTruncOfShl(), matchExtractVecEltBuildVec(), matchICmpToLHSKnownBits(), matchICmpToTrueFalseKnownBits(), matchLoadOrCombine(), matchNarrowBinopFeedingAnd(), and matchTruncStoreMerge().

◆ isLegalOrBeforeLegalizer()

bool CombinerHelper::isLegalOrBeforeLegalizer ( const LegalityQuery & Query ) const

Returns: true if the combine is running prior to legalization, or if Query is legal on the target.

Definition at line 122 of file CombinerHelper.cpp.

References llvm::LegalizeActionStep::Action, llvm::LegalizerInfo::getAction(), llvm::LegalizeActions::Legal, and LI.

Referenced by matchAshrShlToSextInreg(), matchCombineDivRem(), matchCombineLoadWithAndMask(), matchCombineShlOfExtend(), matchCombineTruncOfShl(), matchExtractVecEltBuildVec(), matchFunnelShiftToRotate(), matchHoistLogicOpWithSameOpcodeHands(), matchICmpToLHSKnownBits(), matchLoadOrCombine(), matchNarrowBinopFeedingAnd(), matchSextInRegOfLoad(), and matchTruncStoreMerge().

◆ isPredecessor()

bool CombinerHelper::isPredecessor	(	const MachineInstr &	DefMI,
		const MachineInstr &	UseMI
	)

Returns true if DefMI precedes UseMI or they are the same instruction.

Both must be in the same basic block.

Definition at line 706 of file CombinerHelper.cpp.

References assert(), DefMI, llvm::MachineBasicBlock::end(), llvm::find_if(), llvm_unreachable, MBB, MI, and UseMI.

Referenced by dominates().

◆ matchAllExplicitUsesAreUndef()

bool CombinerHelper::matchAllExplicitUsesAreUndef ( MachineInstr & MI )

Return true if all register explicit use operands on MI are defined by a G_IMPLICIT_DEF.

Definition at line 2216 of file CombinerHelper.cpp.

References llvm::all_of(), and MI.

◆ matchAnyExplicitUseIsUndef()

bool CombinerHelper::matchAnyExplicitUseIsUndef ( MachineInstr & MI )

Return true if any explicit use operand on MI is defined by a G_IMPLICIT_DEF.

Definition at line 2209 of file CombinerHelper.cpp.

References llvm::any_of(), and MI.

◆ matchAshrShlToSextInreg()

bool CombinerHelper::matchAshrShlToSextInreg	(	MachineInstr &	MI,
		std::tuple< Register, int64_t > &	MatchInfo
	)

Match ashr (shl x, C), C -> sext_inreg (C)

Definition at line 2628 of file CombinerHelper.cpp.

References assert(), llvm::MachineRegisterInfo::getType(), isLegalOrBeforeLegalizer(), llvm::MIPatternMatch::m_GAShr(), llvm::MIPatternMatch::m_GShl(), llvm::MIPatternMatch::m_ICst(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchBinOpSameVal()

bool CombinerHelper::matchBinOpSameVal ( MachineInstr & MI )

Optimize (x op x) -> x.

Definition at line 2377 of file CombinerHelper.cpp.

References llvm::canReplaceReg(), matchEqualDefs(), MI, and MRI.

◆ matchBitfieldExtractFromAnd()

bool CombinerHelper::matchBitfieldExtractFromAnd	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Match: and (lshr x, cst), mask -> ubfx x, cst, width.

Form a G_UBFX from "(a srl b) & mask", where b and mask are constants.

Definition at line 4010 of file CombinerHelper.cpp.

References assert(), B, llvm::APInt::countTrailingOnes(), llvm::TargetLoweringBase::getPreferredShiftAmountTy(), llvm::LLT::getScalarSizeInBits(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::MIPatternMatch::m_GAnd(), llvm::MIPatternMatch::m_GLShr(), llvm::MIPatternMatch::m_ICst(), llvm::MIPatternMatch::m_OneNonDBGUse(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and llvm::Check::Size.

◆ matchBitfieldExtractFromSExtInReg()

bool CombinerHelper::matchBitfieldExtractFromSExtInReg	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Form a G_SBFX from a G_SEXT_INREG fed by a right shift.

Definition at line 3981 of file CombinerHelper.cpp.

References assert(), llvm::TargetLoweringBase::getPreferredShiftAmountTy(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::LegalizerInfo::isLegalOrCustom(), LI, MI, and MRI.

◆ matchBitfieldExtractFromShr()

bool CombinerHelper::matchBitfieldExtractFromShr	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Match: shr (shl x, n), k -> sbfx/ubfx x, pos, width.

Definition at line 4046 of file CombinerHelper.cpp.

References assert(), llvm::TargetLoweringBase::getPreferredShiftAmountTy(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::LegalizerInfo::isLegalOrCustom(), LI, MI, and MRI.

◆ matchCombineAddP2IToPtrAdd()

bool CombinerHelper::matchCombineAddP2IToPtrAdd	(	MachineInstr &	MI,
		std::pair< Register, bool > &	PtrRegAndCommute
	)

Transform G_ADD (G_PTRTOINT x), y -> G_PTRTOINT (G_PTR_ADD x, y) Transform G_ADD y, (G_PTRTOINT x) -> G_PTRTOINT (G_PTR_ADD x, y)

Definition at line 1962 of file CombinerHelper.cpp.

References assert(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::MIPatternMatch::m_GPtrToInt(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchCombineAnyExtTrunc()

bool CombinerHelper::matchCombineAnyExtTrunc	(	MachineInstr &	MI,
		Register &	Reg
	)

Transform anyext(trunc(x)) to x.

Definition at line 2034 of file CombinerHelper.cpp.

References assert(), llvm::MachineRegisterInfo::getType(), llvm::MIPatternMatch::m_all_of(), llvm::MIPatternMatch::m_GTrunc(), llvm::MIPatternMatch::m_Reg(), llvm::MIPatternMatch::m_SpecificType(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

◆ matchCombineConcatVectors()

bool CombinerHelper::matchCombineConcatVectors	(	MachineInstr &	MI,
		bool &	IsUndef,
		SmallVectorImpl< Register > &	Ops
	)

Check if the G_CONCAT_VECTORS MI is undef or if it can be flattened into a build_vector.

In the first case IsUndef will be true. In the second case Ops will contain the operands needed to produce the flattened build_vector.

Precondition: MI.getOpcode() == G_CONCAT_VECTORS.

Definition at line 190 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildUndef(), llvm::tgtok::Def, llvm::LLT::getNumElements(), llvm::LLT::getScalarType(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getVRegDef(), MI, MRI, Reg, llvm::MachineIRBuilder::setInsertPt(), and llvm::RegState::Undef.

Referenced by tryCombineConcatVectors().

◆ matchCombineConstantFoldFpUnary()

bool CombinerHelper::matchCombineConstantFoldFpUnary	(	MachineInstr &	MI,
		Optional< APFloat > &	Cst
	)

Transform fp_instr(cst) to constant result of the fp operation.

Definition at line 1251 of file CombinerHelper.cpp.

References constantFoldFpUnary(), llvm::MachineRegisterInfo::getType(), llvm::Optional< T >::hasValue(), MI, and MRI.

◆ matchCombineConstPtrAddToI2P()

bool CombinerHelper::matchCombineConstPtrAddToI2P	(	MachineInstr &	MI,
		int64_t &	NewCst
	)

Definition at line 2006 of file CombinerHelper.cpp.

References Builder, llvm::getConstantVRegSExtVal(), llvm::MachineIRBuilder::getMF(), llvm::MachineFunction::getRegInfo(), llvm::MIPatternMatch::m_GIntToPtr(), llvm::MIPatternMatch::m_ICst(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchCombineCopy()

bool CombinerHelper::matchCombineCopy ( MachineInstr & MI )

Definition at line 166 of file CombinerHelper.cpp.

References llvm::canReplaceReg(), MI, and MRI.

Referenced by tryCombineCopy().

◆ matchCombineDivRem()

bool CombinerHelper::matchCombineDivRem	(	MachineInstr &	MI,
		MachineInstr *&	OtherMI
	)

Try to combine G_[SU]DIV and G_[SU]REM into a single G_[SU]DIVREM when their source operands are identical.

Definition at line 1033 of file CombinerHelper.cpp.

References llvm::MachineRegisterInfo::getType(), isLegalOrBeforeLegalizer(), llvm_unreachable, matchEqualDefs(), MI, MRI, llvm::MachineRegisterInfo::use_nodbg_instructions(), and UseMI.

◆ matchCombineExtendingLoads()

bool CombinerHelper::matchCombineExtendingLoads	(	MachineInstr &	MI,
		PreferredTuple &	MatchInfo
	)

Definition at line 451 of file CombinerHelper.cpp.

References llvm::LegalizerInfo::getAction(), llvm::GAnyLoad::getDstReg(), llvm::GLoadStore::getMMO(), llvm::GLoadStore::getPointerReg(), llvm::MachineInstrBuilder::getReg(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::isPowerOf2_32(), llvm::LLT::isScalar(), llvm::LegalizeActions::Legal, LI, MI, MRI, llvm::MachineRegisterInfo::use_nodbg_instructions(), and UseMI.

Referenced by tryCombineExtendingLoads().

◆ matchCombineExtOfExt()

bool CombinerHelper::matchCombineExtOfExt	(	MachineInstr &	MI,
		std::tuple< Register, unsigned > &	MatchInfo
	)

Transform [asz]ext([asz]ext(x)) to [asz]ext x.

Definition at line 2057 of file CombinerHelper.cpp.

References assert(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getVRegDef(), MI, and MRI.

◆ matchCombineFAbsOfFAbs()

bool CombinerHelper::matchCombineFAbsOfFAbs	(	MachineInstr &	MI,
		Register &	Src
	)

Match fabs(fabs(x)) to fabs(x).

Definition at line 2127 of file CombinerHelper.cpp.

References assert(), llvm::MIPatternMatch::m_GFabs(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchCombineFNegOfFNeg()

bool CombinerHelper::matchCombineFNegOfFNeg	(	MachineInstr &	MI,
		Register &	Reg
	)

Transform fneg(fneg(x)) to x.

Definition at line 2121 of file CombinerHelper.cpp.

References assert(), llvm::MIPatternMatch::m_GFNeg(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

◆ matchCombineI2PToP2I()

bool CombinerHelper::matchCombineI2PToP2I	(	MachineInstr &	MI,
		Register &	Reg
	)

Transform IntToPtr(PtrToInt(x)) to x if cast is in the same address space.

Definition at line 1931 of file CombinerHelper.cpp.

References assert(), llvm::MachineRegisterInfo::getType(), llvm::MIPatternMatch::m_all_of(), llvm::MIPatternMatch::m_GPtrToInt(), llvm::MIPatternMatch::m_Reg(), llvm::MIPatternMatch::m_SpecificType(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

◆ matchCombineIndexedLoadStore()

bool CombinerHelper::matchCombineIndexedLoadStore	(	MachineInstr &	MI,
		IndexedLoadStoreMatchInfo &	MatchInfo
	)

Definition at line 970 of file CombinerHelper.cpp.

References llvm::IndexedLoadStoreMatchInfo::Addr, llvm::IndexedLoadStoreMatchInfo::Base, ForceLegalIndexing, llvm::IndexedLoadStoreMatchInfo::IsPre, MI, and llvm::IndexedLoadStoreMatchInfo::Offset.

Referenced by tryCombineIndexedLoadStore().

◆ matchCombineInsertVecElts()

bool CombinerHelper::matchCombineInsertVecElts	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	MatchInfo
	)

◆ matchCombineLoadWithAndMask()

bool CombinerHelper::matchCombineLoadWithAndMask	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

◆ matchCombineMergeUnmerge()

bool CombinerHelper::matchCombineMergeUnmerge	(	MachineInstr &	MI,
		Register &	MatchInfo
	)

Fold away a merge of an unmerge of the corresponding values.

Definition at line 1615 of file CombinerHelper.cpp.

References llvm::SmallVectorImpl< T >::emplace_back(), I, Merge, MI, and MRI.

◆ matchCombineMulToShl()

bool CombinerHelper::matchCombineMulToShl	(	MachineInstr &	MI,
		unsigned &	ShiftVal
	)

Transform a multiply by a power-of-2 value to a left shift.

Definition at line 1539 of file CombinerHelper.cpp.

References assert(), llvm::getConstantVRegValWithLookThrough(), MI, and MRI.

◆ matchCombineP2IToI2P()

bool CombinerHelper::matchCombineP2IToI2P	(	MachineInstr &	MI,
		Register &	Reg
	)

Transform PtrToInt(IntToPtr(x)) to x.

Definition at line 1948 of file CombinerHelper.cpp.

References assert(), llvm::MIPatternMatch::m_GIntToPtr(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

◆ matchCombineShiftToUnmerge()

bool CombinerHelper::matchCombineShiftToUnmerge	(	MachineInstr &	MI,
		unsigned	TargetShiftSize,
		unsigned &	ShiftVal
	)

Reduce a shift by a constant to an unmerge and a shift on a half sized type.

This will not produce a shift smaller than TargetShiftSize.

Definition at line 1822 of file CombinerHelper.cpp.

References assert(), llvm::getConstantVRegValWithLookThrough(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::LLT::isVector(), MI, MRI, and llvm::Check::Size.

Referenced by tryCombineShiftToUnmerge().

◆ matchCombineShlOfExtend()

bool CombinerHelper::matchCombineShlOfExtend	(	MachineInstr &	MI,
		RegisterImmPair &	MatchData
	)

◆ matchCombineShuffleVector()

bool CombinerHelper::matchCombineShuffleVector	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	Ops
	)

Check if the G_SHUFFLE_VECTOR MI can be replaced by a concat_vectors.

Ops will contain the operands needed to produce the flattened concat_vectors.

Precondition: MI.getOpcode() == G_SHUFFLE_VECTOR.

Definition at line 266 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildUndef(), llvm::LLT::getNumElements(), llvm::MachineInstrBuilder::getReg(), llvm::MachineRegisterInfo::getType(), i, llvm::LLT::isVector(), llvm::BitmaskEnumDetail::Mask(), MI, MRI, and llvm::MachineIRBuilder::setInsertPt().

Referenced by tryCombineShuffleVector().

◆ matchCombineTruncOfExt()

bool CombinerHelper::matchCombineTruncOfExt	(	MachineInstr &	MI,
		std::pair< Register, unsigned > &	MatchInfo
	)

Transform trunc ([asz]ext x) to x or ([asz]ext x) or (trunc x).

Definition at line 2134 of file CombinerHelper.cpp.

References assert(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getVRegDef(), MI, and MRI.

◆ matchCombineTruncOfShl()

bool CombinerHelper::matchCombineTruncOfShl	(	MachineInstr &	MI,
		std::pair< Register, Register > &	MatchInfo
	)

Transform trunc (shl x, K) to shl (trunc x), K => K < VT.getScalarSizeInBits().

Definition at line 2169 of file CombinerHelper.cpp.

References assert(), llvm::KnownBits::countMinLeadingZeros(), llvm::KnownBits::getBitWidth(), llvm::GISelKnownBits::getKnownBits(), llvm::TargetLoweringBase::getPreferredShiftAmountTy(), llvm::LLT::getSizeInBits(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), isLegalOrBeforeLegalizer(), KB, llvm::Log2_32(), llvm::MIPatternMatch::m_GShl(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and llvm::Check::Size.

◆ matchCombineUnmergeConstant()

bool CombinerHelper::matchCombineUnmergeConstant	(	MachineInstr &	MI,
		SmallVectorImpl< APInt > &	Csts
	)

Transform G_UNMERGE Constant -> Constant1, Constant2, ...

Definition at line 1689 of file CombinerHelper.cpp.

References llvm::APFloat::bitcastToAPInt(), llvm::SmallVectorImpl< T >::emplace_back(), llvm::MachineOperand::getCImm(), llvm::MachineOperand::getFPImm(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::ConstantInt::getValue(), llvm::ConstantFP::getValueAPF(), llvm::MachineRegisterInfo::getVRegDef(), llvm::APInt::lshr(), MI, MRI, and llvm::APInt::trunc().

◆ matchCombineUnmergeMergeToPlainValues()

bool CombinerHelper::matchCombineUnmergeMergeToPlainValues	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	Operands
	)

Transform <ty,...> G_UNMERGE(G_MERGE ty X, Y, Z) -> ty X, Y, Z.

Definition at line 1642 of file CombinerHelper.cpp.

References assert(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), MI, MRI, Operands, and peekThroughBitcast().

◆ matchCombineUnmergeWithDeadLanesToTrunc()

bool CombinerHelper::matchCombineUnmergeWithDeadLanesToTrunc ( MachineInstr & MI )

Transform X, Y<dead> = G_UNMERGE Z -> X = G_TRUNC Z.

Definition at line 1730 of file CombinerHelper.cpp.

References assert(), MI, MRI, and llvm::MachineRegisterInfo::use_nodbg_empty().

◆ matchCombineUnmergeZExtToZExt()

bool CombinerHelper::matchCombineUnmergeZExtToZExt ( MachineInstr & MI )

Transform X, Y = G_UNMERGE(G_ZEXT(Z)) -> X = G_ZEXT(Z); Y = G_CONSTANT 0.

Definition at line 1762 of file CombinerHelper.cpp.

References assert(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::LLT::isVector(), llvm::MIPatternMatch::m_GZExt(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchCombineZextTrunc()

bool CombinerHelper::matchCombineZextTrunc	(	MachineInstr &	MI,
		Register &	Reg
	)

Transform zext(trunc(x)) to x.

Definition at line 2043 of file CombinerHelper.cpp.

References assert(), llvm::KnownBits::countMinLeadingZeros(), llvm::GISelKnownBits::getKnownBits(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), KB, llvm::MIPatternMatch::m_all_of(), llvm::MIPatternMatch::m_GTrunc(), llvm::MIPatternMatch::m_Reg(), llvm::MIPatternMatch::m_SpecificType(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

◆ matchConstantFold()

bool CombinerHelper::matchConstantFold	(	MachineInstr &	MI,
		APInt &	MatchInfo
	)

Do constant folding when opportunities are exposed after MIR building.

Definition at line 4278 of file CombinerHelper.cpp.

References llvm::ConstantFoldBinOp(), MI, and MRI.

◆ matchConstantOp()

bool CombinerHelper::matchConstantOp	(	const MachineOperand &	MOP,
		int64_t	C
	)

Return true if MOP is defined by a G_CONSTANT with a value equal to C.

Definition at line 2340 of file CombinerHelper.cpp.

References llvm::getConstantVRegValWithLookThrough(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), and MRI.

Referenced by matchOperandIsZero().

◆ matchConstantSelectCmp()

bool CombinerHelper::matchConstantSelectCmp	(	MachineInstr &	MI,
		unsigned &	OpIdx
	)

Return true if a G_SELECT instruction MI has a constant comparison.

If true, OpIdx will store the operand index of the known selected value.

Definition at line 2241 of file CombinerHelper.cpp.

References assert(), llvm::getConstantVRegValWithLookThrough(), MI, and MRI.

◆ matchEqualDefs()

bool CombinerHelper::matchEqualDefs	(	const MachineOperand &	MOP1,
		const MachineOperand &	MOP2
	)

Return true if MOP1 and MOP2 are register operands are defined by equivalent instructions.

Definition at line 2256 of file CombinerHelper.cpp.

References llvm::any_of(), Builder, llvm::MachineInstr::findRegisterDefOperandIdx(), llvm::getDefSrcRegIgnoringCopies(), llvm::MachineOperand::getReg(), llvm::MachineIRBuilder::getTII(), llvm::MachineInstr::isDereferenceableInvariantLoad(), llvm::MachineInstr::isIdenticalTo(), llvm::MachineOperand::isReg(), llvm::MachineInstr::mayLoadOrStore(), MRI, llvm::TargetInstrInfo::produceSameValue(), and llvm::MachineInstr::uses().

Referenced by matchBinOpSameVal(), matchCombineDivRem(), matchHoistLogicOpWithSameOpcodeHands(), and matchSelectSameVal().

◆ matchExtendThroughPhis()

bool CombinerHelper::matchExtendThroughPhis	(	MachineInstr &	MI,
		MachineInstr *&	ExtMI
	)

Definition at line 3606 of file CombinerHelper.cpp.

References assert(), Builder, DefMI, llvm::getDefIgnoringCopies(), llvm::MachineInstr::getOpcode(), llvm::MachineIRBuilder::getTII(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::TargetInstrInfo::isExtendLikelyToBeFolded(), llvm::LLT::isVector(), MI, MRI, llvm::SmallPtrSetImplBase::size(), and llvm::MachineRegisterInfo::use_instr_nodbg_begin().

◆ matchExtractAllEltsFromBuildVector()

bool CombinerHelper::matchExtractAllEltsFromBuildVector	(	MachineInstr &	MI,
		SmallVectorImpl< std::pair< Register, MachineInstr * >> &	MatchInfo
	)

Definition at line 3762 of file CombinerHelper.cpp.

References llvm::SmallBitVector::all(), assert(), llvm::getConstantVRegVal(), llvm::LLT::getNumElements(), llvm::MachineRegisterInfo::getType(), llvm::make_range(), MI, MRI, llvm::SmallBitVector::set(), llvm::MachineRegisterInfo::use_instr_nodbg_begin(), and llvm::MachineRegisterInfo::use_instr_nodbg_end().

◆ matchExtractVecEltBuildVec()

bool CombinerHelper::matchExtractVecEltBuildVec	(	MachineInstr &	MI,
		Register &	Reg
	)

Definition at line 3707 of file CombinerHelper.cpp.

References assert(), llvm::getConstantVRegValWithLookThrough(), llvm::LLT::getElementType(), llvm::getMVTForLLT(), llvm::LLT::getNumElements(), llvm::getOpcodeDef(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), isLegalOrBeforeLegalizer(), MI, MRI, and Reg.

◆ matchFunnelShiftToRotate()

bool CombinerHelper::matchFunnelShiftToRotate ( MachineInstr & MI )

Match an FSHL or FSHR that can be combined to a ROTR or ROTL rotate.

Definition at line 3831 of file CombinerHelper.cpp.

References assert(), llvm::MachineRegisterInfo::getType(), isLegalOrBeforeLegalizer(), MI, MRI, X, and Y.

◆ matchHoistLogicOpWithSameOpcodeHands()

bool CombinerHelper::matchHoistLogicOpWithSameOpcodeHands	(	MachineInstr &	MI,
		InstructionStepsMatchInfo &	MatchInfo
	)

Match (logic_op (op x...), (op y...)) -> (op (logic_op x, y))

Definition at line 2522 of file CombinerHelper.cpp.

References llvm::MachineInstrBuilder::addReg(), assert(), llvm::MachineRegisterInfo::createGenericVirtualRegister(), llvm::getDefIgnoringCopies(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), isLegalOrBeforeLegalizer(), llvm::MachineOperand::isReg(), llvm::Register::isValid(), matchEqualDefs(), MI, MRI, X, and Y.

◆ matchICmpToLHSKnownBits()

bool CombinerHelper::matchICmpToLHSKnownBits	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Returns: true if a G_ICMP MI can be replaced with its LHS based off of KnownBits information.

Definition at line 3938 of file CombinerHelper.cpp.

References assert(), B, llvm::getICmpTrueVal(), llvm::GISelKnownBits::getKnownBits(), llvm::LLT::getSizeInBits(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::isEquality(), isLegalOrBeforeLegalizer(), llvm::LLT::isVector(), KB, llvm::MIPatternMatch::m_SpecificICst(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchICmpToTrueFalseKnownBits()

bool CombinerHelper::matchICmpToTrueFalseKnownBits	(	MachineInstr &	MI,
		int64_t &	MatchInfo
	)

Returns: true if a G_ICMP instruction MI can be replaced with a true or false constant based off of KnownBits information.

Definition at line 3885 of file CombinerHelper.cpp.

References assert(), llvm::KnownBits::eq(), llvm::getICmpTrueVal(), llvm::GISelKnownBits::getKnownBits(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_SGE, llvm::CmpInst::ICMP_SGT, llvm::CmpInst::ICMP_SLE, llvm::CmpInst::ICMP_SLT, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULE, llvm::CmpInst::ICMP_ULT, llvm::LLT::isVector(), KB, llvm_unreachable, MI, MRI, llvm::KnownBits::ne(), llvm::KnownBits::sge(), llvm::KnownBits::sgt(), llvm::KnownBits::sle(), llvm::KnownBits::slt(), llvm::KnownBits::uge(), llvm::KnownBits::ugt(), llvm::KnownBits::ule(), and llvm::KnownBits::ult().

◆ matchLoadOrCombine()

bool CombinerHelper::matchLoadOrCombine	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Match expression trees of the form.

sN *a = ...

sM val = a[0] | (a[1] << N) | (a[2] << 2N) | (a[3] << 3N) ...

And check if the tree can be replaced with a M-bit load + possibly a bswap.

Definition at line 3228 of file CombinerHelper.cpp.

References assert(), bigEndianByteAt(), llvm::MachineRegisterInfo::cloneVirtualRegister(), DL, llvm::DenseMapBase< SmallDenseMap< KeyT, ValueT, 4, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >, KeyT, ValueT, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >::end(), llvm::DenseMapBase< SmallDenseMap< KeyT, ValueT, 4, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >, KeyT, ValueT, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >::find(), llvm::Function::getContext(), llvm::MachineFunction::getDataLayout(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getMachineMemOperand(), llvm::GLoadStore::getMMO(), llvm::MachineMemOperand::getPointerInfo(), llvm::GLoadStore::getPointerReg(), llvm::LLT::getSizeInBits(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::Optional< T >::hasValue(), isBigEndian(), llvm::DataLayout::isBigEndian(), isLegalOrBeforeLegalizer(), llvm::LLT::isVector(), littleEndianByteAt(), llvm::LegalityQuery::MemDesc::MemoryTy, MI, and MRI.

◆ matchNarrowBinopFeedingAnd()

bool CombinerHelper::matchNarrowBinopFeedingAnd	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Returns: true if it is possible to narrow the width of a scalar binop feeding a G_AND instruction MI.

Definition at line 4288 of file CombinerHelper.cpp.

References assert(), B, Builder, llvm::MachineIRBuilder::buildInstr(), llvm::MachineIRBuilder::buildTrunc(), llvm::MachineIRBuilder::buildZExt(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), DL, llvm::MipsISD::Ext, llvm::getConstantVRegValWithLookThrough(), llvm::getDefIgnoringCopies(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::LLT::getSizeInBits(), getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), isLegalOrBeforeLegalizer(), llvm::LLT::isScalar(), llvm::BitmaskEnumDetail::Mask(), MI, MRI, Observer, and llvm::LLT::scalar().

◆ matchNotCmp()

bool CombinerHelper::matchNotCmp	(	MachineInstr &	MI,
		SmallVectorImpl< Register > &	RegsToNegate
	)

Combine inverting a result of a compare into the opposite cond code.

Definition at line 2801 of file CombinerHelper.cpp.

References assert(), Builder, llvm::tgtok::Def, llvm::getBuildVectorConstantSplat(), llvm::MachineIRBuilder::getMF(), llvm::LLT::getScalarSizeInBits(), llvm::LLT::getSizeInBits(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getVRegDef(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), I, isConstValidTrue(), llvm::LLT::isVector(), llvm::MIPatternMatch::m_GXor(), llvm::MIPatternMatch::m_ICst(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

◆ matchOperandIsKnownToBeAPowerOfTwo()

bool CombinerHelper::matchOperandIsKnownToBeAPowerOfTwo	(	MachineInstr &	MI,
		unsigned	OpIdx
	)

Check if operand OpIdx is known to be a power of 2.

Definition at line 2395 of file CombinerHelper.cpp.

References llvm::MachineOperand::getReg(), llvm::isKnownToBeAPowerOfTwo(), KB, MI, and MRI.

◆ matchOperandIsUndef()

bool CombinerHelper::matchOperandIsUndef	(	MachineInstr &	MI,
		unsigned	OpIdx
	)

Check if operand OpIdx is undef.

Definition at line 2389 of file CombinerHelper.cpp.

References llvm::getOpcodeDef(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), MI, and MRI.

◆ matchOperandIsZero()

bool CombinerHelper::matchOperandIsZero	(	MachineInstr &	MI,
		unsigned	OpIdx
	)

Check if operand OpIdx is zero.

Definition at line 2383 of file CombinerHelper.cpp.

References llvm::canReplaceReg(), matchConstantOp(), MI, and MRI.

◆ matchOptBrCondByInvertingCond()

bool CombinerHelper::matchOptBrCondByInvertingCond	(	MachineInstr &	MI,
		MachineInstr *&	BrCond
	)

If a brcond's true block is not the fallthrough, make it so by inverting the condition and swapping operands.

Definition at line 1127 of file CombinerHelper.cpp.

References assert(), llvm::MachineBasicBlock::begin(), llvm::MachineBasicBlock::end(), llvm::MachineOperand::getMBB(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::isLayoutSuccessor(), MBB, and MI.

◆ matchOverlappingAnd()

bool CombinerHelper::matchOverlappingAnd	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Fold and(and(x, C1), C2) -> C1&C2 ? and(x, C1&C2) : 0.

and(and(x, C1), C2) -> C1&C2 ? and(x, C1&C2) : 0

Definition at line 2659 of file CombinerHelper.cpp.

References assert(), B, C1, llvm::MachineRegisterInfo::getType(), llvm::MIPatternMatch::m_GAnd(), llvm::MIPatternMatch::m_ICst(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and replaceRegWith().

◆ matchPtrAddImmedChain()

bool CombinerHelper::matchPtrAddImmedChain	(	MachineInstr &	MI,
		PtrAddChain &	MatchInfo
	)

◆ matchPtrAddZero()

bool CombinerHelper::matchPtrAddZero ( MachineInstr & MI )

}

Combine G_PTR_ADD with nullptr to G_INTTOPTR

Definition at line 2955 of file CombinerHelper.cpp.

References assert(), Builder, DL, llvm::LLT::getAddressSpace(), llvm::getConstantVRegVal(), llvm::MachineFunction::getDataLayout(), llvm::MachineIRBuilder::getMF(), llvm::LLT::getScalarType(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getVRegDef(), llvm::isBuildVectorAllZeros(), llvm::LLT::isPointer(), llvm::LLT::isVector(), MI, and MRI.

◆ matchReassocConstantInnerLHS()

bool CombinerHelper::matchReassocConstantInnerLHS	(	GPtrAdd &	MI,
		MachineInstr *	LHS,
		MachineInstr *	RHS,
		BuildFnTy &	MatchInfo
	)

Definition at line 4187 of file CombinerHelper.cpp.

References B, llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MIPatternMatch::m_GPtrAdd(), llvm::MIPatternMatch::m_ICst(), llvm::MIPatternMatch::m_OneNonDBGUse(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Observer.

Referenced by matchReassocPtrAdd().

◆ matchReassocConstantInnerRHS()

bool CombinerHelper::matchReassocConstantInnerRHS	(	GPtrAdd &	MI,
		MachineInstr *	RHS,
		BuildFnTy &	MatchInfo
	)

Definition at line 4163 of file CombinerHelper.cpp.

References B, Builder, llvm::MachineIRBuilder::buildPtrAdd(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::getConstantVRegVal(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getType(), MI, MRI, and Observer.

Referenced by matchReassocPtrAdd().

◆ matchReassocFoldConstantsInSubTree()

bool CombinerHelper::matchReassocFoldConstantsInSubTree	(	GPtrAdd &	MI,
		MachineInstr *	LHS,
		MachineInstr *	RHS,
		BuildFnTy &	MatchInfo
	)

Definition at line 4216 of file CombinerHelper.cpp.

References B, C1, llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::getConstantVRegVal(), llvm::MachineRegisterInfo::getType(), MI, MRI, and Observer.

Referenced by matchReassocPtrAdd().

◆ matchReassocPtrAdd()

bool CombinerHelper::matchReassocPtrAdd	(	MachineInstr &	MI,
		BuildFnTy &	MatchInfo
	)

Reassociate pointer calculations with G_ADD involved, to allow better addressing mode usage.

Definition at line 4245 of file CombinerHelper.cpp.

References llvm::MachineRegisterInfo::getVRegDef(), matchReassocConstantInnerLHS(), matchReassocConstantInnerRHS(), matchReassocFoldConstantsInSubTree(), MI, and MRI.

◆ matchRedundantAnd()

bool CombinerHelper::matchRedundantAnd	(	MachineInstr &	MI,
		Register &	Replacement
	)

Returns: true if MI is a G_AND instruction whose operands are x and y where x & y == x or x & y == y. (E.g., one of operands is all-ones value.)

Parameters

[in]	MI	- The G_AND instruction.
[out]	Replacement	- A register the G_AND should be replaced with on success.

Definition at line 2685 of file CombinerHelper.cpp.

References assert(), llvm::canReplaceReg(), llvm::GISelKnownBits::getKnownBits(), llvm::MachineRegisterInfo::getType(), llvm::LLT::isVector(), KB, MI, MRI, llvm::KnownBits::One, and llvm::KnownBits::Zero.

◆ matchRedundantOr()

bool CombinerHelper::matchRedundantOr	(	MachineInstr &	MI,
		Register &	Replacement
	)

Returns: true if MI is a G_OR instruction whose operands are x and y where x | y == x or x | y == y. (E.g., one of operands is all-zeros value.)

Parameters

[in]	MI	- The G_OR instruction.
[out]	Replacement	- A register the G_OR should be replaced with on success.

Definition at line 2740 of file CombinerHelper.cpp.

References assert(), llvm::canReplaceReg(), llvm::GISelKnownBits::getKnownBits(), llvm::MachineRegisterInfo::getType(), llvm::LLT::isVector(), KB, MI, MRI, llvm::KnownBits::One, and llvm::KnownBits::Zero.

◆ matchRedundantSExtInReg()

bool CombinerHelper::matchRedundantSExtInReg ( MachineInstr & MI )

Returns: true if MI is a G_SEXT_INREG that can be erased.

Definition at line 2786 of file CombinerHelper.cpp.

References llvm::GISelKnownBits::computeNumSignBits(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), KB, MI, and MRI.

◆ matchRotateOutOfRange()

bool CombinerHelper::matchRotateOutOfRange ( MachineInstr & MI )

Definition at line 3855 of file CombinerHelper.cpp.

References assert(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::matchUnaryPredicate(), MI, and MRI.

◆ matchSelectSameVal()

bool CombinerHelper::matchSelectSameVal ( MachineInstr & MI )

Optimize (cond ? x : x) -> x.

Definition at line 2369 of file CombinerHelper.cpp.

References assert(), llvm::canReplaceReg(), matchEqualDefs(), MI, and MRI.

◆ matchSextInRegOfLoad()

bool CombinerHelper::matchSextInRegOfLoad	(	MachineInstr &	MI,
		std::tuple< Register, unsigned > &	MatchInfo
	)

Match sext_inreg(load p), imm -> sextload p.

Definition at line 767 of file CombinerHelper.cpp.

References assert(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), isLegalOrBeforeLegalizer(), llvm::isPowerOf2_32(), llvm::LLT::isVector(), llvm::LegalityQuery::MemDesc::MemoryTy, MI, llvm::min(), MRI, and llvm::LLT::scalar().

◆ matchSextTruncSextLoad()

bool CombinerHelper::matchSextTruncSextLoad ( MachineInstr & MI )

Definition at line 734 of file CombinerHelper.cpp.

References assert(), llvm::LLT::getSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::LLT::isVector(), llvm::MIPatternMatch::m_GTrunc(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchShiftImmedChain()

bool CombinerHelper::matchShiftImmedChain	(	MachineInstr &	MI,
		RegisterImmPair &	MatchInfo
	)

Fold (shift (shift base, x), y) -> (shift base (x+y))

Definition at line 1346 of file CombinerHelper.cpp.

References assert(), llvm::sampleprof::Base, llvm::getConstantVRegValWithLookThrough(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getUniqueVRegDef(), llvm::RegisterImmPair::Imm, MI, MRI, and llvm::RegisterImmPair::Reg.

◆ matchShiftOfShiftedLogic()

bool CombinerHelper::matchShiftOfShiftedLogic	(	MachineInstr &	MI,
		ShiftOfShiftedLogic &	MatchInfo
	)

If we have a shift-by-constant of a bitwise logic op that itself has a shift-by-constant operand with identical opcode, we may be able to convert that into 2 independent shifts followed by the logic op.

Definition at line 1424 of file CombinerHelper.cpp.

References assert(), C1, llvm::getConstantVRegValWithLookThrough(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::LLT::getScalarSizeInBits(), llvm::MachineRegisterInfo::getType(), llvm::MachineRegisterInfo::getUniqueVRegDef(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), llvm::ShiftOfShiftedLogic::Logic, llvm::ShiftOfShiftedLogic::LogicNonShiftReg, MI, MRI, llvm::ShiftOfShiftedLogic::Shift2, and llvm::ShiftOfShiftedLogic::ValSum.

◆ matchSimplifyAddToSub()

bool CombinerHelper::matchSimplifyAddToSub	(	MachineInstr &	MI,
		std::tuple< Register, Register > &	MatchInfo
	)

Return true if MI is a G_ADD which can be simplified to a G_SUB.

Definition at line 2433 of file CombinerHelper.cpp.

References llvm::MIPatternMatch::m_Neg(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), and MRI.

◆ matchTruncStoreMerge()

bool CombinerHelper::matchTruncStoreMerge	(	MachineInstr &	MI,
		MergeTruncStoresInfo &	MatchInfo
	)

Match a pattern where a wide type scalar value is stored by several narrow stores.

Fold it into a single store or a BSWAP and a store if the targets supports it.

Assuming little endian target: i8 *p = ... i32 val = ... p[0] = (val >> 0) & 0xFF; p[1] = (val >> 8) & 0xFF; p[2] = (val >> 16) & 0xFF; p[3] = (val >> 24) & 0xFF; => *((i32)p) = val;

i8 *p = ... i32 val = ... p[0] = (val >> 24) & 0xFF; p[1] = (val >> 16) & 0xFF; p[2] = (val >> 8) & 0xFF; p[3] = (val >> 0) & 0xFF; => *((i32)p) = BSWAP(val);

Definition at line 3409 of file CombinerHelper.cpp.

References llvm::ARMBuildAttrs::Allowed, llvm::TargetLoweringBase::allowsMemoryAccess(), assert(), DL, llvm::SmallVectorImpl< T >::emplace_back(), llvm::MergeTruncStoresInfo::FoundStores, llvm::MachineMemOperand::getMemoryType(), llvm::GLoadStore::getMMO(), llvm::GLoadStore::getPointerReg(), llvm::LLT::getScalarSizeInBits(), llvm::LLT::getSizeInBits(), getTargetLowering(), getTruncStoreByteOffset(), llvm::MachineRegisterInfo::getType(), i, INT64_MAX, isLegalOrBeforeLegalizer(), llvm::LLT::isScalar(), llvm::GLoadStore::isSimple(), llvm::Register::isValid(), j(), llvm::MergeTruncStoresInfo::LowestIdxStore, llvm::MIPatternMatch::m_GPtrAdd(), llvm::MIPatternMatch::m_ICst(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), move, MRI, llvm::MergeTruncStoresInfo::NeedBSwap, llvm::MergeTruncStoresInfo::NeedRotate, and llvm::MergeTruncStoresInfo::WideSrcVal.

◆ matchUndefSelectCmp()

bool CombinerHelper::matchUndefSelectCmp ( MachineInstr & MI )

Return true if a G_SELECT instruction MI has an undef comparison.

Definition at line 2235 of file CombinerHelper.cpp.

References assert(), llvm::getOpcodeDef(), MI, and MRI.

◆ matchUndefShuffleVectorMask()

bool CombinerHelper::matchUndefShuffleVectorMask ( MachineInstr & MI )

Return true if a G_SHUFFLE_VECTOR instruction MI has an undef mask.

Definition at line 2223 of file CombinerHelper.cpp.

References llvm::all_of(), assert(), llvm::BitmaskEnumDetail::Mask(), and MI.

◆ matchUndefStore()

bool CombinerHelper::matchUndefStore ( MachineInstr & MI )

Return true if a G_STORE instruction MI is storing an undef value.

Definition at line 2229 of file CombinerHelper.cpp.

References assert(), llvm::getOpcodeDef(), MI, and MRI.

◆ matchXorOfAndWithSameReg()

bool CombinerHelper::matchXorOfAndWithSameReg	(	MachineInstr &	MI,
		std::pair< Register, Register > &	MatchInfo
	)

Fold (xor (and x, y), y) -> (and (not x), y) {.

Definition at line 2910 of file CombinerHelper.cpp.

References assert(), llvm::MachineRegisterInfo::hasOneNonDBGUse(), llvm::MIPatternMatch::m_GAnd(), llvm::MIPatternMatch::m_Reg(), MI, llvm::MIPatternMatch::mi_match(), MRI, std::swap(), X, and Y.

◆ replaceInstWithConstant() [1/2]

bool CombinerHelper::replaceInstWithConstant	(	MachineInstr &	MI,
		APInt	C
	)

Replace an instruction with a G_CONSTANT with value C.

Definition at line 2417 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), Builder, MI, and llvm::MachineIRBuilder::setInstr().

◆ replaceInstWithConstant() [2/2]

bool CombinerHelper::replaceInstWithConstant	(	MachineInstr &	MI,
		int64_t	C
	)

Replace an instruction with a G_CONSTANT with value C.

Definition at line 2409 of file CombinerHelper.cpp.

References assert(), llvm::MachineIRBuilder::buildConstant(), Builder, MI, and llvm::MachineIRBuilder::setInstr().

◆ replaceInstWithFConstant()

bool CombinerHelper::replaceInstWithFConstant	(	MachineInstr &	MI,
		double	C
	)

Replace an instruction with a G_FCONSTANT with value C.

Definition at line 2401 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildFConstant(), MI, and llvm::MachineIRBuilder::setInstr().

◆ replaceInstWithUndef()

bool CombinerHelper::replaceInstWithUndef ( MachineInstr & MI )

Replace an instruction with a G_IMPLICIT_DEF.

Definition at line 2425 of file CombinerHelper.cpp.

References assert(), Builder, llvm::MachineIRBuilder::buildUndef(), MI, and llvm::MachineIRBuilder::setInstr().

◆ replaceRegOpWith()

void CombinerHelper::replaceRegOpWith	(	MachineRegisterInfo &	MRI,
		MachineOperand &	FromRegOp,
		Register	ToReg
	)		const

Replace a single register operand with a new register and inform the observer of the changes.

Definition at line 139 of file CombinerHelper.cpp.

References assert(), llvm::GISelChangeObserver::changedInstr(), llvm::GISelChangeObserver::changingInstr(), llvm::MachineOperand::getParent(), Observer, and llvm::MachineOperand::setReg().

Referenced by applyCombineExtendingLoads().

◆ replaceRegWith()

void CombinerHelper::replaceRegWith	(	MachineRegisterInfo &	MRI,
		Register	FromReg,
		Register	ToReg
	)		const

◆ replaceSingleDefInstWithOperand()

bool CombinerHelper::replaceSingleDefInstWithOperand	(	MachineInstr &	MI,
		unsigned	OpIdx
	)

Delete MI and replace all of its uses with its OpIdx-th operand.

Definition at line 2348 of file CombinerHelper.cpp.

References assert(), llvm::canReplaceReg(), MI, MRI, and replaceRegWith().

◆ replaceSingleDefInstWithReg()

bool CombinerHelper::replaceSingleDefInstWithReg	(	MachineInstr &	MI,
		Register	Replacement
	)

Delete MI and replace all of its uses with Replacement.

Definition at line 2359 of file CombinerHelper.cpp.

References assert(), llvm::canReplaceReg(), MI, MRI, and replaceRegWith().

Referenced by applyExtractVecEltBuildVec().

◆ setRegBank()

void CombinerHelper::setRegBank	(	Register	Reg,
		const RegisterBank *	RegBank
	)

Set the register bank of Reg.

Does nothing if the RegBank is null. This is the counterpart to getRegBank.

Definition at line 154 of file CombinerHelper.cpp.

References MRI, Reg, and llvm::MachineRegisterInfo::setRegBank().

Referenced by applyPtrAddImmedChain().

◆ tryCombine()

bool CombinerHelper::tryCombine ( MachineInstr & MI )

Try to transform MI by using all of the above combine functions.

Returns true if changed.

Definition at line 4379 of file CombinerHelper.cpp.

References MI, tryCombineCopy(), tryCombineExtendingLoads(), and tryCombineIndexedLoadStore().

◆ tryCombineConcatVectors()

bool CombinerHelper::tryCombineConcatVectors ( MachineInstr & MI )

If MI is G_CONCAT_VECTORS, try to combine it.

Returns true if MI changed. Right now, we support:

concat_vector(undef, undef) => undef
concat_vector(build_vector(A, B), build_vector(C, D)) => build_vector(A, B, C, D)

Precondition: MI.getOpcode() == G_CONCAT_VECTORS.

Definition at line 180 of file CombinerHelper.cpp.

References applyCombineConcatVectors(), matchCombineConcatVectors(), and MI.

◆ tryCombineCopy()

bool CombinerHelper::tryCombineCopy ( MachineInstr & MI )

If MI is COPY, try to combine it.

Returns true if MI changed.

Definition at line 159 of file CombinerHelper.cpp.

References applyCombineCopy(), matchCombineCopy(), and MI.

Referenced by tryCombine().

◆ tryCombineExtendingLoads()

bool CombinerHelper::tryCombineExtendingLoads ( MachineInstr & MI )

If MI is extend that consumes the result of a load, try to combine it.

Returns true if MI changed.

Definition at line 442 of file CombinerHelper.cpp.

References applyCombineExtendingLoads(), matchCombineExtendingLoads(), and MI.

Referenced by tryCombine().

◆ tryCombineIndexedLoadStore()

bool CombinerHelper::tryCombineIndexedLoadStore ( MachineInstr & MI )

Combine MI into a pre-indexed or post-indexed load/store operation if legal and the surrounding code makes it useful.

Definition at line 961 of file CombinerHelper.cpp.

References applyCombineIndexedLoadStore(), matchCombineIndexedLoadStore(), and MI.

Referenced by tryCombine().

◆ tryCombineMemCpyFamily()

bool CombinerHelper::tryCombineMemCpyFamily	(	MachineInstr &	MI,
		unsigned	MaxLen = `0`
	)

Optimize memcpy intrinsics et al, e.g.

constant len calls. /p MaxLen if non-zero specifies the max length of a mem libcall to inline.

For example (pre-indexed):

$addr = G_PTR_ADD $base, $offset
[...]
$val = G_LOAD $addr
[...]
$whatever = COPY $addr

-->

$val, $addr = G_INDEXED_LOAD $base, $offset, 1 (IsPre)
[...]
$whatever = COPY $addr

or (post-indexed):

G_STORE $val, $base
[...]
$addr = G_PTR_ADD $base, $offset
[...]
$whatever = COPY $addr

-->

$addr = G_INDEXED_STORE $val, $base, $offset
[...]
$whatever = COPY $addr

Definition at line 1201 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::getMF(), llvm::LegalizerHelper::lowerMemCpyFamily(), and MI.

◆ tryCombineShiftToUnmerge()

bool CombinerHelper::tryCombineShiftToUnmerge	(	MachineInstr &	MI,
		unsigned	TargetShiftAmount
	)

Definition at line 1920 of file CombinerHelper.cpp.

References applyCombineShiftToUnmerge(), matchCombineShiftToUnmerge(), and MI.

◆ tryCombineShuffleVector()

bool CombinerHelper::tryCombineShuffleVector ( MachineInstr & MI )

Try to combine G_SHUFFLE_VECTOR into G_CONCAT_VECTORS.

Returns true if MI changed.

Precondition: MI.getOpcode() == G_SHUFFLE_VECTOR.

Definition at line 257 of file CombinerHelper.cpp.

References applyCombineShuffleVector(), matchCombineShuffleVector(), and MI.

◆ tryEmitMemcpyInline()

bool CombinerHelper::tryEmitMemcpyInline ( MachineInstr & MI )

Emit loads and stores that perform the given memcpy.

Assumes MI is a G_MEMCPY_INLINE TODO: implement dynamically sized inline memcpy, and rename: s/bool tryEmit/void emit/

Definition at line 1193 of file CombinerHelper.cpp.

References llvm::MachineIRBuilder::getMF(), and MI.

Member Data Documentation

◆ Builder

MachineIRBuilder& llvm::CombinerHelper::Builder

protected

Definition at line 106 of file CombinerHelper.h.

Referenced by applyAshShlToSextInreg(), applyBuildFn(), applyBuildFnNoErase(), applyBuildInstructionSteps(), applyCombineAddP2IToPtrAdd(), applyCombineConcatVectors(), applyCombineConstantFoldFpUnary(), applyCombineConstPtrAddToI2P(), applyCombineDivRem(), applyCombineExtendingLoads(), applyCombineExtOfExt(), applyCombineI2PToP2I(), applyCombineInsertVecElts(), applyCombineMulByNegativeOne(), applyCombineP2IToI2P(), applyCombineShiftToUnmerge(), applyCombineShlOfExtend(), applyCombineShuffleVector(), applyCombineTruncOfExt(), applyCombineTruncOfShl(), applyCombineUnmergeConstant(), applyCombineUnmergeMergeToPlainValues(), applyCombineUnmergeWithDeadLanesToTrunc(), applyCombineUnmergeZExtToZExt(), applyExtendThroughPhis(), applyExtractVecEltBuildVec(), applyFunnelShiftToRotate(), applyNotCmp(), applyOptBrCondByInvertingCond(), applyPtrAddZero(), applyRotateOutOfRange(), applySextInRegOfLoad(), applySextTruncSextLoad(), applyShiftImmedChain(), applyShiftOfShiftedLogic(), applySimplifyAddToSub(), applySimplifyURemByPow2(), applyTruncStoreMerge(), applyXorOfAndWithSameReg(), getTargetLowering(), matchCombineConcatVectors(), matchCombineConstPtrAddToI2P(), matchCombineShuffleVector(), matchEqualDefs(), matchExtendThroughPhis(), matchNarrowBinopFeedingAnd(), matchNotCmp(), matchPtrAddZero(), matchReassocConstantInnerRHS(), replaceInstWithConstant(), replaceInstWithFConstant(), replaceInstWithUndef(), and replaceRegWith().

◆ KB

GISelKnownBits* llvm::CombinerHelper::KB

protected

Definition at line 109 of file CombinerHelper.h.

Referenced by getKnownBits(), matchCombineShlOfExtend(), matchCombineTruncOfShl(), matchCombineZextTrunc(), matchICmpToLHSKnownBits(), matchICmpToTrueFalseKnownBits(), matchOperandIsKnownToBeAPowerOfTwo(), matchRedundantAnd(), matchRedundantOr(), and matchRedundantSExtInReg().

◆ LI

const LegalizerInfo* llvm::CombinerHelper::LI

protected

Definition at line 111 of file CombinerHelper.h.

Referenced by isLegalOrBeforeLegalizer(), matchBitfieldExtractFromSExtInReg(), matchBitfieldExtractFromShr(), matchCombineExtendingLoads(), and matchCombineShlOfExtend().

◆ MDT

MachineDominatorTree* llvm::CombinerHelper::MDT

protected

Definition at line 110 of file CombinerHelper.h.

Referenced by dominates().

◆ MRI

MachineRegisterInfo& llvm::CombinerHelper::MRI

protected

Definition at line 107 of file CombinerHelper.h.

Referenced by applyAshShlToSextInreg(), applyCombineAddP2IToPtrAdd(), applyCombineConcatVectors(), applyCombineCopy(), applyCombineExtendingLoads(), applyCombineIndexedLoadStore(), applyCombineInsertVecElts(), applyCombineMulByNegativeOne(), applyCombineMulToShl(), applyCombineShiftToUnmerge(), applyCombineShlOfExtend(), applyCombineShuffleVector(), applyCombineTruncOfExt(), applyCombineTruncOfShl(), applyCombineUnmergeMergeToPlainValues(), applyCombineUnmergeWithDeadLanesToTrunc(), applyCombineUnmergeZExtToZExt(), applyExtendThroughPhis(), applyExtractAllEltsFromBuildVector(), applyExtractVecEltBuildVec(), applyNotCmp(), applyOptBrCondByInvertingCond(), applyPtrAddImmedChain(), applyRotateOutOfRange(), applySextInRegOfLoad(), applyShiftImmedChain(), applyShiftOfShiftedLogic(), applySimplifyURemByPow2(), applyTruncStoreMerge(), applyXorOfAndWithSameReg(), getRegBank(), matchAshrShlToSextInreg(), matchBinOpSameVal(), matchBitfieldExtractFromAnd(), matchBitfieldExtractFromSExtInReg(), matchBitfieldExtractFromShr(), matchCombineAddP2IToPtrAdd(), matchCombineAnyExtTrunc(), matchCombineConcatVectors(), matchCombineConstantFoldFpUnary(), matchCombineConstPtrAddToI2P(), matchCombineCopy(), matchCombineDivRem(), matchCombineExtendingLoads(), matchCombineExtOfExt(), matchCombineFAbsOfFAbs(), matchCombineFNegOfFNeg(), matchCombineI2PToP2I(), matchCombineInsertVecElts(), matchCombineLoadWithAndMask(), matchCombineMergeUnmerge(), matchCombineMulToShl(), matchCombineP2IToI2P(), matchCombineShiftToUnmerge(), matchCombineShlOfExtend(), matchCombineShuffleVector(), matchCombineTruncOfExt(), matchCombineTruncOfShl(), matchCombineUnmergeConstant(), matchCombineUnmergeMergeToPlainValues(), matchCombineUnmergeWithDeadLanesToTrunc(), matchCombineUnmergeZExtToZExt(), matchCombineZextTrunc(), matchConstantFold(), matchConstantOp(), matchConstantSelectCmp(), matchEqualDefs(), matchExtendThroughPhis(), matchExtractAllEltsFromBuildVector(), matchExtractVecEltBuildVec(), matchFunnelShiftToRotate(), matchHoistLogicOpWithSameOpcodeHands(), matchICmpToLHSKnownBits(), matchICmpToTrueFalseKnownBits(), matchLoadOrCombine(), matchNarrowBinopFeedingAnd(), matchNotCmp(), matchOperandIsKnownToBeAPowerOfTwo(), matchOperandIsUndef(), matchOperandIsZero(), matchOverlappingAnd(), matchPtrAddImmedChain(), matchPtrAddZero(), matchReassocConstantInnerLHS(), matchReassocConstantInnerRHS(), matchReassocFoldConstantsInSubTree(), matchReassocPtrAdd(), matchRedundantAnd(), matchRedundantOr(), matchRedundantSExtInReg(), matchRotateOutOfRange(), matchSelectSameVal(), matchSextInRegOfLoad(), matchSextTruncSextLoad(), matchShiftImmedChain(), matchShiftOfShiftedLogic(), matchSimplifyAddToSub(), matchTruncStoreMerge(), matchUndefSelectCmp(), matchUndefStore(), matchXorOfAndWithSameReg(), replaceRegWith(), replaceSingleDefInstWithOperand(), replaceSingleDefInstWithReg(), and setRegBank().

◆ Observer

GISelChangeObserver& llvm::CombinerHelper::Observer

protected

Definition at line 108 of file CombinerHelper.h.

Referenced by applyCombineExtendingLoads(), applyCombineExtOfExt(), applyCombineMulToShl(), applyFunnelShiftToRotate(), applyNotCmp(), applyOptBrCondByInvertingCond(), applyPtrAddImmedChain(), applyRotateOutOfRange(), applyShiftImmedChain(), applyXorOfAndWithSameReg(), matchNarrowBinopFeedingAnd(), matchReassocConstantInnerLHS(), matchReassocConstantInnerRHS(), matchReassocFoldConstantsInSubTree(), replaceRegOpWith(), and replaceRegWith().

◆ RBI

const RegisterBankInfo* llvm::CombinerHelper::RBI

protected

Definition at line 112 of file CombinerHelper.h.

Referenced by getRegBank().

◆ TRI

const TargetRegisterInfo* llvm::CombinerHelper::TRI

protected

Definition at line 113 of file CombinerHelper.h.

Referenced by getRegBank().

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

include/llvm/CodeGen/GlobalISel/CombinerHelper.h
lib/CodeGen/GlobalISel/CombinerHelper.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ CombinerHelper()

Member Function Documentation

◆ applyAshShlToSextInreg()

◆ applyBuildFn()

◆ applyBuildFnNoErase()

◆ applyBuildInstructionSteps()

◆ applyCombineAddP2IToPtrAdd()

◆ applyCombineAnyExtTrunc()

◆ applyCombineConcatVectors()

◆ applyCombineConstantFoldFpUnary()

◆ applyCombineConstPtrAddToI2P()

◆ applyCombineCopy()

◆ applyCombineDivRem()

◆ applyCombineExtendingLoads()

◆ applyCombineExtOfExt()

◆ applyCombineFAbsOfFAbs()

◆ applyCombineI2PToP2I()

◆ applyCombineIndexedLoadStore()

◆ applyCombineInsertVecElts()

◆ applyCombineMulByNegativeOne()

◆ applyCombineMulToShl()

◆ applyCombineP2IToI2P()

◆ applyCombineShiftToUnmerge()

◆ applyCombineShlOfExtend()

◆ applyCombineShuffleVector()

◆ applyCombineTruncOfExt()

◆ applyCombineTruncOfShl()

◆ applyCombineUnmergeConstant()

◆ applyCombineUnmergeMergeToPlainValues()

◆ applyCombineUnmergeWithDeadLanesToTrunc()

◆ applyCombineUnmergeZExtToZExt()

◆ applyExtendThroughPhis()

◆ applyExtractAllEltsFromBuildVector()

◆ applyExtractVecEltBuildVec()

◆ applyFunnelShiftToRotate()

◆ applyNotCmp()

◆ applyOptBrCondByInvertingCond()

◆ applyPtrAddImmedChain()

◆ applyPtrAddZero()

◆ applyRotateOutOfRange()

◆ applySextInRegOfLoad()

◆ applySextTruncSextLoad()

◆ applyShiftImmedChain()

◆ applyShiftOfShiftedLogic()

◆ applySimplifyAddToSub()

◆ applySimplifyURemByPow2()

◆ applyTruncStoreMerge()

◆ applyXorOfAndWithSameReg()

◆ dominates()

◆ eraseInst()

◆ getKnownBits()

◆ getRegBank()

◆ getTargetLowering()

◆ isLegalOrBeforeLegalizer()

◆ isPredecessor()

◆ matchAllExplicitUsesAreUndef()

◆ matchAnyExplicitUseIsUndef()

◆ matchAshrShlToSextInreg()

◆ matchBinOpSameVal()

◆ matchBitfieldExtractFromAnd()

◆ matchBitfieldExtractFromSExtInReg()

◆ matchBitfieldExtractFromShr()

◆ matchCombineAddP2IToPtrAdd()

◆ matchCombineAnyExtTrunc()

◆ matchCombineConcatVectors()

◆ matchCombineConstantFoldFpUnary()

◆ matchCombineConstPtrAddToI2P()

◆ matchCombineCopy()

◆ matchCombineDivRem()

◆ matchCombineExtendingLoads()

◆ matchCombineExtOfExt()

◆ matchCombineFAbsOfFAbs()

◆ matchCombineFNegOfFNeg()

◆ matchCombineI2PToP2I()

◆ matchCombineIndexedLoadStore()

◆ matchCombineInsertVecElts()