#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/CaptureTracking.h"
#include "llvm/Analysis/CmpInstAnalysis.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/InstSimplifyFolder.h"
#include "llvm/Analysis/LoopAnalysisManager.h"
#include "llvm/Analysis/MemoryBuiltins.h"
#include "llvm/Analysis/OverflowInstAnalysis.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Analysis/VectorUtils.h"
#include "llvm/IR/ConstantRange.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/IR/ValueHandle.h"
#include "llvm/Support/KnownBits.h"
#include <algorithm>
#include "llvm/IR/Instruction.def"

Include dependency graph for InstructionSimplify.cpp:

Namespaces
	llvm
	This is an optimization pass for GlobalISel generic memory operations.

Macros
#define	DEBUG_TYPE "instsimplify"

#define	HANDLE_CAST_INST(num, opc, clas) case Instruction::opc:

Enumerations
enum	{ RecursionLimit = 3 }

Functions
	STATISTIC (NumExpand, "Number of expansions")

	STATISTIC (NumReassoc, "Number of reassociations")

static Value *	SimplifyAndInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an And, see if we can fold the result. More...

static Value *	simplifyUnOp (unsigned Opcode, Value *Op, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given the operand for a UnaryOperator, see if we can fold the result. More...

static Value *	simplifyFPUnOp (unsigned Opcode, Value *Op, const FastMathFlags &FMF, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given the operand for a UnaryOperator, see if we can fold the result. More...

static Value *	SimplifyBinOp (unsigned Opcode, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a BinaryOperator, see if we can fold the result. More...

static Value *	SimplifyBinOp (unsigned Opcode, Value LHS, Value RHS, const FastMathFlags &FMF, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a BinaryOperator, see if we can fold the result. More...

static Value *	SimplifyCmpInst (unsigned Predicate, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a CmpInst, see if we can fold the result. More...

static Value *	SimplifyICmpInst (unsigned Predicate, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an ICmpInst, see if we can fold the result. More...

static Value *	SimplifyOrInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an Or, see if we can fold the result. More...

static Value *	SimplifyXorInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a Xor, see if we can fold the result. More...

static Value *	SimplifyCastInst (unsigned, Value , Type , const SimplifyQuery &, unsigned)

static Value *	SimplifyGEPInst (Type SrcTy, Value Ptr, ArrayRef< Value * > Indices, bool InBounds, const SimplifyQuery &Q, unsigned)
	Given operands for an GetElementPtrInst, see if we can fold the result. More...

static Value *	SimplifySelectInst (Value Cond, Value TrueVal, Value *FalseVal, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a SelectInst, see if we can fold the result. More...

static Value *	foldSelectWithBinaryOp (Value Cond, Value TrueVal, Value *FalseVal)

static Constant *	getFalse (Type *Ty)
	For a boolean type or a vector of boolean type, return false or a vector with every element false. More...

static Constant *	getTrue (Type *Ty)
	For a boolean type or a vector of boolean type, return true or a vector with every element true. More...

static bool	isSameCompare (Value V, CmpInst::Predicate Pred, Value LHS, Value *RHS)
	isSameCompare - Is V equivalent to the comparison "LHS Pred RHS"? More...

static Value *	simplifyCmpSelCase (CmpInst::Predicate Pred, Value LHS, Value RHS, Value Cond, const SimplifyQuery &Q, unsigned MaxRecurse, Constant TrueOrFalse)
	Simplify comparison with true or false branch of select: sel = select i1 cond, i32 tv, i32 fv cmp = icmp sle i32 sel, rhs Compose new comparison by substituting sel with either tv or fv and see if it simplifies. More...

static Value *	simplifyCmpSelTrueCase (CmpInst::Predicate Pred, Value LHS, Value RHS, Value *Cond, const SimplifyQuery &Q, unsigned MaxRecurse)
	Simplify comparison with true branch of select. More...

static Value *	simplifyCmpSelFalseCase (CmpInst::Predicate Pred, Value LHS, Value RHS, Value *Cond, const SimplifyQuery &Q, unsigned MaxRecurse)
	Simplify comparison with false branch of select. More...

static Value *	handleOtherCmpSelSimplifications (Value TCmp, Value FCmp, Value *Cond, const SimplifyQuery &Q, unsigned MaxRecurse)
	We know comparison with both branches of select can be simplified, but they are not equal. More...

static bool	valueDominatesPHI (Value V, PHINode P, const DominatorTree *DT)
	Does the given value dominate the specified phi node? More...

static Value *	expandBinOp (Instruction::BinaryOps Opcode, Value V, Value OtherOp, Instruction::BinaryOps OpcodeToExpand, const SimplifyQuery &Q, unsigned MaxRecurse)
	Try to simplify a binary operator of form "V op OtherOp" where V is "(B0 opex B1)" by distributing 'op' across 'opex' as "(B0 op OtherOp) opex (B1 op OtherOp)". More...

static Value *	expandCommutativeBinOp (Instruction::BinaryOps Opcode, Value L, Value R, Instruction::BinaryOps OpcodeToExpand, const SimplifyQuery &Q, unsigned MaxRecurse)
	Try to simplify binops of form "A op (B op' C)" or the commuted variant by distributing op over op'. More...

static Value *	SimplifyAssociativeBinOp (Instruction::BinaryOps Opcode, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	Generic simplifications for associative binary operations. More...

static Value *	ThreadBinOpOverSelect (Instruction::BinaryOps Opcode, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	In the case of a binary operation with a select instruction as an operand, try to simplify the binop by seeing whether evaluating it on both branches of the select results in the same value. More...

static Value *	ThreadCmpOverSelect (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	In the case of a comparison with a select instruction, try to simplify the comparison by seeing whether both branches of the select result in the same value. More...

static Value *	ThreadBinOpOverPHI (Instruction::BinaryOps Opcode, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	In the case of a binary operation with an operand that is a PHI instruction, try to simplify the binop by seeing whether evaluating it on the incoming phi values yields the same result for every value. More...

static Value *	ThreadCmpOverPHI (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	In the case of a comparison with a PHI instruction, try to simplify the comparison by seeing whether comparing with all of the incoming phi values yields the same result every time. More...

static Constant *	foldOrCommuteConstant (Instruction::BinaryOps Opcode, Value &Op0, Value &Op1, const SimplifyQuery &Q)

static Value *	SimplifyAddInst (Value Op0, Value Op1, bool IsNSW, bool IsNUW, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an Add, see if we can fold the result. More...

static Constant *	stripAndComputeConstantOffsets (const DataLayout &DL, Value *&V, bool AllowNonInbounds=false)
	Compute the base pointer and cumulative constant offsets for V. More...

static Constant *	computePointerDifference (const DataLayout &DL, Value LHS, Value RHS)
	Compute the constant difference between two pointer values. More...

static Value *	SimplifySubInst (Value Op0, Value Op1, bool isNSW, bool isNUW, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a Sub, see if we can fold the result. More...

static Value *	SimplifyMulInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a Mul, see if we can fold the result. More...

static Value *	simplifyDivRem (Instruction::BinaryOps Opcode, Value Op0, Value Op1, const SimplifyQuery &Q)
	Check for common or similar folds of integer division or integer remainder. More...

static bool	isICmpTrue (ICmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given a predicate and two operands, return true if the comparison is true. More...

static bool	isDivZero (Value X, Value Y, const SimplifyQuery &Q, unsigned MaxRecurse, bool IsSigned)
	Return true if we can simplify X / Y to 0. More...

static Value *	simplifyDiv (Instruction::BinaryOps Opcode, Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	These are simplifications common to SDiv and UDiv. More...

static Value *	simplifyRem (Instruction::BinaryOps Opcode, Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	These are simplifications common to SRem and URem. More...

static Value *	SimplifySDivInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an SDiv, see if we can fold the result. More...

static Value *	SimplifyUDivInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a UDiv, see if we can fold the result. More...

static Value *	SimplifySRemInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an SRem, see if we can fold the result. More...

static Value *	SimplifyURemInst (Value Op0, Value Op1, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for a URem, see if we can fold the result. More...

static bool	isPoisonShift (Value *Amount, const SimplifyQuery &Q)
	Returns true if a shift by `Amount` always yields poison. More...

static Value *	SimplifyShift (Instruction::BinaryOps Opcode, Value Op0, Value Op1, bool IsNSW, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an Shl, LShr or AShr, see if we can fold the result. More...

static Value *	SimplifyRightShift (Instruction::BinaryOps Opcode, Value Op0, Value Op1, bool isExact, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an Shl, LShr or AShr, see if we can fold the result. More...

static Value *	SimplifyShlInst (Value Op0, Value Op1, bool isNSW, bool isNUW, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an Shl, see if we can fold the result. More...

static Value *	SimplifyLShrInst (Value Op0, Value Op1, bool isExact, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an LShr, see if we can fold the result. More...

static Value *	SimplifyAShrInst (Value Op0, Value Op1, bool isExact, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an AShr, see if we can fold the result. More...

static Value *	simplifyUnsignedRangeCheck (ICmpInst ZeroICmp, ICmpInst UnsignedICmp, bool IsAnd, const SimplifyQuery &Q)
	Commuted variants are assumed to be handled by calling this function again with the parameters swapped. More...

static Value *	simplifyAndOfICmpsWithSameOperands (ICmpInst Op0, ICmpInst Op1)
	Commuted variants are assumed to be handled by calling this function again with the parameters swapped. More...

static Value *	simplifyOrOfICmpsWithSameOperands (ICmpInst Op0, ICmpInst Op1)
	Commuted variants are assumed to be handled by calling this function again with the parameters swapped. More...

static Value *	simplifyAndOrOfICmpsWithConstants (ICmpInst Cmp0, ICmpInst Cmp1, bool IsAnd)
	Test if a pair of compares with a shared operand and 2 constants has an empty set intersection, full set union, or if one compare is a superset of the other. More...

static Value *	simplifyAndOrOfICmpsWithZero (ICmpInst Cmp0, ICmpInst Cmp1, bool IsAnd)

static Value *	simplifyAndOfICmpsWithAdd (ICmpInst Op0, ICmpInst Op1, const InstrInfoQuery &IIQ)

static Value *	simplifyAndOrOfICmpsWithLimitConst (ICmpInst Cmp0, ICmpInst Cmp1, bool IsAnd)
	Try to eliminate compares with signed or unsigned min/max constants. More...

static Value *	simplifyAndOfICmps (ICmpInst Op0, ICmpInst Op1, const SimplifyQuery &Q)

static Value *	simplifyOrOfICmpsWithAdd (ICmpInst Op0, ICmpInst Op1, const InstrInfoQuery &IIQ)

static Value *	simplifyOrOfICmps (ICmpInst Op0, ICmpInst Op1, const SimplifyQuery &Q)

static Value *	simplifyAndOrOfFCmps (const TargetLibraryInfo TLI, FCmpInst LHS, FCmpInst *RHS, bool IsAnd)

static Value *	simplifyAndOrOfCmps (const SimplifyQuery &Q, Value Op0, Value Op1, bool IsAnd)

static Value *	simplifyLogicOfAddSub (Value Op0, Value Op1, Instruction::BinaryOps Opcode)
	Given a bitwise logic op, check if the operands are add/sub with a common source value and inverted constant (identity: C - X -> ~(X + ~C)). More...

static Value *	simplifyOrLogic (Value X, Value Y)

static Type *	GetCompareTy (Value *Op)

static Value *	ExtractEquivalentCondition (Value V, CmpInst::Predicate Pred, Value LHS, Value *RHS)
	Rummage around inside V looking for something equivalent to the comparison "LHS Pred RHS". More...

static Constant *	computePointerICmp (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q)

static Value *	simplifyICmpOfBools (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q)
	Fold an icmp when its operands have i1 scalar type. More...

static Value *	simplifyICmpWithZero (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q)
	Try hard to fold icmp with zero RHS because this is a common case. More...

static Value *	simplifyICmpWithConstant (CmpInst::Predicate Pred, Value LHS, Value RHS, const InstrInfoQuery &IIQ)

static Value *	simplifyICmpWithBinOpOnLHS (CmpInst::Predicate Pred, BinaryOperator LBO, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)

static bool	trySimplifyICmpWithAdds (CmpInst::Predicate Pred, Value LHS, Value RHS)

static Value *	simplifyICmpWithBinOp (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	TODO: A large part of this logic is duplicated in InstCombine's foldICmpBinOp(). More...

static Value *	simplifyICmpWithMinMax (CmpInst::Predicate Pred, Value LHS, Value RHS, const SimplifyQuery &Q, unsigned MaxRecurse)
	Simplify integer comparisons where at least one operand of the compare matches an integer min/max idiom. More...

static Value *	simplifyICmpWithDominatingAssume (CmpInst::Predicate Predicate, Value LHS, Value RHS, const SimplifyQuery &Q)

static Value *	SimplifyFCmpInst (unsigned Predicate, Value LHS, Value RHS, FastMathFlags FMF, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given operands for an FCmpInst, see if we can fold the result. More...

static Value *	simplifyWithOpReplaced (Value V, Value Op, Value *RepOp, const SimplifyQuery &Q, bool AllowRefinement, unsigned MaxRecurse)

static Value *	simplifySelectBitTest (Value TrueVal, Value FalseVal, Value X, const APInt Y, bool TrueWhenUnset)
	Try to simplify a select instruction when its condition operand is an integer comparison where one operand of the compare is a constant. More...

static Value *	simplifySelectWithFakeICmpEq (Value CmpLHS, Value CmpRHS, ICmpInst::Predicate Pred, Value TrueVal, Value FalseVal)
	An alternative way to test if a bit is set or not uses sgt/slt instead of eq/ne. More...

static Value *	simplifySelectWithICmpCond (Value CondVal, Value TrueVal, Value *FalseVal, const SimplifyQuery &Q, unsigned MaxRecurse)
	Try to simplify a select instruction when its condition operand is an integer comparison. More...

static Value *	simplifySelectWithFCmp (Value Cond, Value T, Value *F, const SimplifyQuery &Q)
	Try to simplify a select instruction when its condition operand is a floating-point comparison. More...

static Value *	SimplifyInsertValueInst (Value Agg, Value Val, ArrayRef< unsigned > Idxs, const SimplifyQuery &Q, unsigned)
	Given operands for an InsertValueInst, see if we can fold the result. More...

static Value *	SimplifyExtractValueInst (Value *Agg, ArrayRef< unsigned > Idxs, const SimplifyQuery &, unsigned)
	Given operands for an ExtractValueInst, see if we can fold the result. More...

static Value *	SimplifyExtractElementInst (Value Vec, Value Idx, const SimplifyQuery &Q, unsigned)
	Given operands for an ExtractElementInst, see if we can fold the result. More...

static Value *	SimplifyPHINode (PHINode PN, ArrayRef< Value > IncomingValues, const SimplifyQuery &Q)
	See if we can fold the given phi. If not, returns null. More...

static Value *	foldIdentityShuffles (int DestElt, Value Op0, Value Op1, int MaskVal, Value *RootVec, unsigned MaxRecurse)
	For the given destination element of a shuffle, peek through shuffles to match a root vector source operand that contains that element in the same vector lane (ie, the same mask index), so we can eliminate the shuffle(s). More...

static Value *	SimplifyShuffleVectorInst (Value Op0, Value Op1, ArrayRef< int > Mask, Type *RetTy, const SimplifyQuery &Q, unsigned MaxRecurse)

static Constant *	foldConstant (Instruction::UnaryOps Opcode, Value *&Op, const SimplifyQuery &Q)

static Value *	simplifyFNegInst (Value *Op, FastMathFlags FMF, const SimplifyQuery &Q, unsigned MaxRecurse)
	Given the operand for an FNeg, see if we can fold the result. More...

static Constant *	propagateNaN (Constant *In)

static Constant *	simplifyFPOp (ArrayRef< Value * > Ops, FastMathFlags FMF, const SimplifyQuery &Q, fp::ExceptionBehavior ExBehavior, RoundingMode Rounding)
	Perform folds that are common to any floating-point operation. More...

static bool	canIgnoreSNaN (fp::ExceptionBehavior EB, FastMathFlags FMF)

static Value *	SimplifyFAddInst (Value Op0, Value Op1, FastMathFlags FMF, const SimplifyQuery &Q, unsigned MaxRecurse, fp::ExceptionBehavior ExBehavior=fp::ebIgnore, RoundingMode Rounding=RoundingMode::NearestTiesToEven)
	Given operands for an FAdd, see if we can fold the result. More...

static Value *	SimplifyFSubInst (Value Op0, Value Op1, FastMathFlags FMF, const SimplifyQuery &Q, unsigned MaxRecurse, fp::ExceptionBehavior ExBehavior=fp::ebIgnore, RoundingMode Rounding=RoundingMode::NearestTiesToEven)
	Given operands for an FSub, see if we can fold the result. More...

static Value *	SimplifyFMAFMul (Value Op0, Value Op1, FastMathFlags FMF, const SimplifyQuery &Q, unsigned MaxRecurse, fp::ExceptionBehavior ExBehavior, RoundingMode Rounding)

static Value *	SimplifyFMulInst (Value Op0, Value Op1, FastMathFlags FMF, const SimplifyQuery &Q, unsigned MaxRecurse, fp::ExceptionBehavior ExBehavior=fp::ebIgnore, RoundingMode Rounding=RoundingMode::NearestTiesToEven)
	Given the operands for an FMul, see if we can fold the result. More...

static Value *	SimplifyFDivInst (Value Op0, Value Op1, FastMathFlags FMF, const SimplifyQuery &Q, unsigned, fp::ExceptionBehavior ExBehavior=fp::ebIgnore, RoundingMode Rounding=RoundingMode::NearestTiesToEven)

static Value *	SimplifyFRemInst (Value Op0, Value Op1, FastMathFlags FMF, const SimplifyQuery &Q, unsigned, fp::ExceptionBehavior ExBehavior=fp::ebIgnore, RoundingMode Rounding=RoundingMode::NearestTiesToEven)

static bool	IsIdempotent (Intrinsic::ID ID)

static Value *	SimplifyRelativeLoad (Constant Ptr, Constant Offset, const DataLayout &DL)

static Value *	simplifyUnaryIntrinsic (Function F, Value Op0, const SimplifyQuery &Q)

static Value *	foldMinMaxSharedOp (Intrinsic::ID IID, Value Op0, Value Op1)
	Given a min/max intrinsic, see if it can be removed based on having an operand that is another min/max intrinsic with shared operand(s). More...

static Value *	simplifyBinaryIntrinsic (Function F, Value Op0, Value *Op1, const SimplifyQuery &Q)

static Value *	simplifyIntrinsic (CallBase *Call, const SimplifyQuery &Q)

static Value *	tryConstantFoldCall (CallBase *Call, const SimplifyQuery &Q)

static Value *	SimplifyFreezeInst (Value *Op0, const SimplifyQuery &Q)
	Given operands for a Freeze, see if we can fold the result. More...

static Value *	SimplifyLoadInst (LoadInst LI, Value PtrOp, const SimplifyQuery &Q)

static Value *	simplifyInstructionWithOperands (Instruction I, ArrayRef< Value > NewOps, const SimplifyQuery &SQ, OptimizationRemarkEmitter *ORE)
	See if we can compute a simplified version of this instruction. More...

static bool	replaceAndRecursivelySimplifyImpl (Instruction I, Value SimpleV, const TargetLibraryInfo TLI, const DominatorTree DT, AssumptionCache AC, SmallSetVector< Instruction , 8 > *UnsimplifiedUsers=nullptr)
	Implementation of recursive simplification through an instruction's uses. More...

const SimplifyQuery	llvm::getBestSimplifyQuery (Pass &, Function &)

const SimplifyQuery	llvm::getBestSimplifyQuery (LoopStandardAnalysisResults &, const DataLayout &)

template<class T , class... TArgs>
const SimplifyQuery	llvm::getBestSimplifyQuery (AnalysisManager< T, TArgs... > &, Function &)

const template SimplifyQuery	llvm::getBestSimplifyQuery (AnalysisManager< Function > &, Function &)

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "instsimplify"

Definition at line 51 of file InstructionSimplify.cpp.

◆ HANDLE_CAST_INST

#define HANDLE_CAST_INST	(	num,
		opc,
		clas
	)	case Instruction::opc:

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
RecursionLimit

Definition at line 53 of file InstructionSimplify.cpp.

Function Documentation

◆ canIgnoreSNaN()

static bool canIgnoreSNaN	(	fp::ExceptionBehavior	EB,
		FastMathFlags	FMF
	)

inlinestatic

Definition at line 5049 of file InstructionSimplify.cpp.

References llvm::fp::ebIgnore, and llvm::FastMathFlags::noNaNs().

Referenced by SimplifyFAddInst().

◆ computePointerDifference()

static Constant* computePointerDifference	(	const DataLayout &	DL,
		Value *	LHS,
		Value *	RHS
	)

static

Compute the constant difference between two pointer values.

If the difference is not a constant, returns zero.

Definition at line 722 of file InstructionSimplify.cpp.

References DL, llvm::ConstantExpr::getSub(), LHS, RHS, and stripAndComputeConstantOffsets().

Referenced by SimplifySubInst().

◆ computePointerICmp()

static Constant* computePointerICmp	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q
	)

static

Definition at line 2540 of file InstructionSimplify.cpp.

References llvm::all_of(), llvm::SimplifyQuery::CxtI, DL, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::ConstantInt::get(), llvm::ConstantExpr::getAdd(), GetCompareTy(), getFunction(), llvm::ConstantExpr::getICmp(), llvm::getObjectSize(), llvm::ICmpInst::getSignedPredicate(), llvm::Value::getType(), llvm::getUnderlyingObjects(), llvm::ConstantInt::getValue(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULE, llvm::CmpInst::ICMP_ULT, if(), llvm::SimplifyQuery::IIQ, llvm::isAllocLikeFn(), llvm::ICmpInst::isEquality(), llvm::CmpInst::isFalseWhenEqual(), llvm::isKnownNonZero(), llvm::APInt::isNegative(), llvm::isNoAliasCall(), llvm::Constant::isNullValue(), llvm::CmpInst::isTrueWhenEqual(), LHS, MI, llvm::ObjectSizeOpts::NullIsUnknownSize, llvm::NullPointerIsDefined(), llvm::PointerMayBeCaptured(), RHS, stripAndComputeConstantOffsets(), llvm::Value::stripPointerCasts(), llvm::SimplifyQuery::TLI, llvm::APInt::ult(), and llvm::InstrInfoQuery::UseInstrInfo.

Referenced by SimplifyICmpInst().

◆ expandBinOp()

static Value* expandBinOp	(	Instruction::BinaryOps	Opcode,
		Value *	V,
		Value *	OtherOp,
		Instruction::BinaryOps	OpcodeToExpand,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Try to simplify a binary operator of form "V op OtherOp" where V is "(B0 opex B1)" by distributing 'op' across 'opex' as "(B0 op OtherOp) opex (B1 op OtherOp)".

Definition at line 244 of file InstructionSimplify.cpp.

References B, llvm::SimplifyQuery::getWithoutUndef(), llvm::Instruction::isCommutative(), S, and llvm::SimplifyBinOp().

Referenced by expandCommutativeBinOp().

◆ expandCommutativeBinOp()

static Value* expandCommutativeBinOp	(	Instruction::BinaryOps	Opcode,
		Value *	L,
		Value *	R,
		Instruction::BinaryOps	OpcodeToExpand,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Try to simplify binops of form "A op (B op' C)" or the commuted variant by distributing op over op'.

Definition at line 278 of file InstructionSimplify.cpp.

References expandBinOp().

Referenced by SimplifyAndInst(), SimplifyMulInst(), and SimplifyOrInst().

◆ ExtractEquivalentCondition()

static Value* ExtractEquivalentCondition	(	Value *	V,
		CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS
	)

static

Rummage around inside V looking for something equivalent to the comparison "LHS Pred RHS".

Return such a value if found, otherwise return null. Helper function for analyzing max/min idioms.

Definition at line 2494 of file InstructionSimplify.cpp.

References llvm::CmpInst::getSwappedPredicate(), LHS, RHS, and SI.

Referenced by simplifyICmpWithMinMax().

◆ foldConstant()

static Constant* foldConstant	(	Instruction::UnaryOps	Opcode,
		Value *&	Op,
		const SimplifyQuery &	Q
	)

static

Definition at line 4975 of file InstructionSimplify.cpp.

References llvm::ConstantFoldUnaryOpOperand(), and llvm::SimplifyQuery::DL.

Referenced by simplifyFNegInst().

◆ foldIdentityShuffles()

static Value* foldIdentityShuffles	(	int	DestElt,
		Value *	Op0,
		Value *	Op1,
		int	MaskVal,
		Value *	RootVec,
		unsigned	MaxRecurse
	)

static

For the given destination element of a shuffle, peek through shuffles to match a root vector source operand that contains that element in the same vector lane (ie, the same mask index), so we can eliminate the shuffle(s).

Definition at line 4805 of file InstructionSimplify.cpp.

References llvm::Value::getType().

Referenced by SimplifyShuffleVectorInst().

◆ foldMinMaxSharedOp()

static Value* foldMinMaxSharedOp	(	Intrinsic::ID	IID,
		Value *	Op0,
		Value *	Op1
	)

static

Given a min/max intrinsic, see if it can be removed based on having an operand that is another min/max intrinsic with shared operand(s).

The caller is expected to swap the operand arguments to handle commutation.

Definition at line 5641 of file InstructionSimplify.cpp.

References llvm::getInverseMinMaxIntrinsic(), llvm::PatternMatch::m_c_MaxOrMin(), llvm::PatternMatch::m_MaxOrMin(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), X, and Y.

Referenced by simplifyBinaryIntrinsic().

◆ foldOrCommuteConstant()

static Constant* foldOrCommuteConstant	(	Instruction::BinaryOps	Opcode,
		Value *&	Op0,
		Value *&	Op1,
		const SimplifyQuery &	Q
	)

static

Definition at line 603 of file InstructionSimplify.cpp.

References llvm::ConstantFoldBinaryOpOperands(), llvm::SimplifyQuery::DL, llvm::Instruction::isCommutative(), and std::swap().

Referenced by SimplifyAddInst(), SimplifyAndInst(), simplifyDiv(), SimplifyFAddInst(), SimplifyFDivInst(), SimplifyFMulInst(), SimplifyFRemInst(), SimplifyFSubInst(), SimplifyMulInst(), SimplifyOrInst(), simplifyRem(), SimplifyShift(), SimplifySubInst(), and SimplifyXorInst().

◆ foldSelectWithBinaryOp()

static Value* foldSelectWithBinaryOp	(	Value *	Cond,
		Value *	TrueVal,
		Value *	FalseVal
	)

static

Definition at line 79 of file InstructionSimplify.cpp.

References Cond, llvm::tgtok::FalseVal, llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::PatternMatch::m_c_BinOp(), llvm::PatternMatch::m_c_ICmp(), llvm::PatternMatch::m_ICmp(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), llvm::tgtok::TrueVal, X, and Y.

Referenced by SimplifySelectInst().

◆ GetCompareTy()

static Type* GetCompareTy ( Value * Op )

static

Definition at line 2487 of file InstructionSimplify.cpp.

References llvm::CmpInst::makeCmpResultType().

Referenced by computePointerICmp(), SimplifyFCmpInst(), SimplifyICmpInst(), simplifyICmpOfBools(), simplifyICmpWithBinOp(), simplifyICmpWithBinOpOnLHS(), simplifyICmpWithConstant(), simplifyICmpWithDominatingAssume(), simplifyICmpWithMinMax(), and simplifyICmpWithZero().

◆ getFalse()

static Constant* getFalse ( Type * Ty )

static

For a boolean type or a vector of boolean type, return false or a vector with every element false.

Definition at line 123 of file InstructionSimplify.cpp.

References llvm::ConstantInt::getFalse().

Referenced by simplifyAndOfICmpsWithAdd(), simplifyAndOfICmpsWithSameOperands(), simplifyAndOrOfICmpsWithConstants(), simplifyCmpSelFalseCase(), SimplifyFCmpInst(), SimplifyICmpInst(), simplifyICmpOfBools(), simplifyICmpWithBinOpOnLHS(), simplifyICmpWithMinMax(), simplifyICmpWithZero(), and simplifyUnsignedRangeCheck().

◆ getTrue()

static Constant* getTrue ( Type * Ty )

static

For a boolean type or a vector of boolean type, return true or a vector with every element true.

Definition at line 129 of file InstructionSimplify.cpp.

References llvm::ConstantInt::getTrue().

Referenced by simplifyAndOrOfICmpsWithConstants(), simplifyCmpSelTrueCase(), SimplifyFCmpInst(), SimplifyICmpInst(), simplifyICmpOfBools(), simplifyICmpWithBinOpOnLHS(), simplifyICmpWithMinMax(), simplifyICmpWithZero(), simplifyOrOfICmpsWithAdd(), simplifyOrOfICmpsWithSameOperands(), and simplifyUnsignedRangeCheck().

◆ handleOtherCmpSelSimplifications()

static Value* handleOtherCmpSelSimplifications	(	Value *	TCmp,
		Value *	FCmp,
		Value *	Cond,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

We know comparison with both branches of select can be simplified, but they are not equal.

This routine handles some logical simplifications.

Definition at line 188 of file InstructionSimplify.cpp.

References Cond, llvm::Constant::getAllOnesValue(), llvm::impliesPoison(), llvm::PatternMatch::m_One(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), llvm::SimplifyAndInst(), llvm::SimplifyOrInst(), and llvm::SimplifyXorInst().

Referenced by ThreadCmpOverSelect().

◆ isDivZero()

static bool isDivZero	(	Value *	X,
		Value *	Y,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse,
		bool	IsSigned
	)

static

Return true if we can simplify X / Y to 0.

Remainder can adapt that answer to simplify X % Y to X.

Definition at line 1036 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::computeKnownBits(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::ConstantInt::get(), llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_SGT, llvm::CmpInst::ICMP_SLT, llvm::CmpInst::ICMP_ULT, isICmpTrue(), llvm::PatternMatch::m_APInt(), llvm::PatternMatch::match(), X, and Y.

Referenced by simplifyDiv(), and simplifyRem().

◆ isICmpTrue()

static bool isICmpTrue	(	ICmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given a predicate and two operands, return true if the comparison is true.

This is a helper for div/rem simplification where we return some other value when we can prove a relationship between the operands.

Definition at line 1027 of file InstructionSimplify.cpp.

References LHS, RHS, and llvm::SimplifyICmpInst().

Referenced by isDivZero(), and simplifyBinaryIntrinsic().

◆ IsIdempotent()

static bool IsIdempotent ( Intrinsic::ID ID )

static

Definition at line 5472 of file InstructionSimplify.cpp.

References ceil, floor, round(), and trunc.

Referenced by simplifyUnaryIntrinsic().

◆ isPoisonShift()

static bool isPoisonShift	(	Value *	Amount,
		const SimplifyQuery &	Q
	)

static

Returns true if a shift by Amount always yields poison.

Definition at line 1242 of file InstructionSimplify.cpp.

References E, I, and llvm::SimplifyQuery::isUndefValue().

Referenced by SimplifyShift().

◆ isSameCompare()

static bool isSameCompare	(	Value *	V,
		CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS
	)

static

isSameCompare - Is V equivalent to the comparison "LHS Pred RHS"?

Definition at line 134 of file InstructionSimplify.cpp.

References llvm::CmpInst::getSwappedPredicate(), LHS, and RHS.

Referenced by simplifyCmpSelCase().

◆ propagateNaN()

static Constant* propagateNaN ( Constant * In )

static

Definition at line 5002 of file InstructionSimplify.cpp.

References llvm::ConstantFP::getNaN(), and llvm::tgtok::In.

Referenced by simplifyBinaryIntrinsic(), and simplifyFPOp().

◆ replaceAndRecursivelySimplifyImpl()

static bool replaceAndRecursivelySimplifyImpl	(	Instruction *	I,
		Value *	SimpleV,
		const TargetLibraryInfo *	TLI,
		const DominatorTree *	DT,
		AssumptionCache *	AC,
		SmallSetVector< Instruction , 8 >	UnsimplifiedUsers = `nullptr`
	)

static

Implementation of recursive simplification through an instruction's uses.

This is the common implementation of the recursive simplification routines. If we have a pre-simplified value in 'SimpleV', that is forcibly used to replace the instruction 'I'. Otherwise, we simply add 'I' to the list of instructions to process and attempt to simplify it using InstructionSimplify. Recursively visited users which could not be simplified themselves are to the optional UnsimplifiedUsers set for further processing by the caller.

This routine returns 'true' only when it simplifies something. The passed in simplified value does not count toward this.

Definition at line 6382 of file InstructionSimplify.cpp.

References DL, I, llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::insert(), llvm::JumpTable::Simplified, llvm::SimplifyInstruction(), and llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::size().

Referenced by llvm::replaceAndRecursivelySimplify().

◆ SimplifyAddInst()

static Value* SimplifyAddInst	(	Value *	Op0,
		Value *	Op1,
		bool	IsNSW,
		bool	IsNUW,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an Add, see if we can fold the result.

If not, this returns null.

i1 add -> xor.

Definition at line 619 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyAddInst().

◆ SimplifyAndInst()

static Value * SimplifyAndInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an And, see if we can fold the result.

If not, this returns null.

Definition at line 2020 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyAndInst().

◆ simplifyAndOfICmps()

static Value* simplifyAndOfICmps	(	ICmpInst *	Op0,
		ICmpInst *	Op1,
		const SimplifyQuery &	Q
	)

static

Definition at line 1815 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::IIQ, simplifyAndOfICmpsWithAdd(), simplifyAndOfICmpsWithSameOperands(), simplifyAndOrOfICmpsWithConstants(), simplifyAndOrOfICmpsWithLimitConst(), simplifyAndOrOfICmpsWithZero(), simplifyUnsignedRangeCheck(), and X.

Referenced by simplifyAndOrOfCmps().

◆ simplifyAndOfICmpsWithAdd()

static Value* simplifyAndOfICmpsWithAdd	(	ICmpInst *	Op0,
		ICmpInst *	Op1,
		const InstrInfoQuery &	IIQ
	)

static

◆ simplifyAndOfICmpsWithSameOperands()

static Value* simplifyAndOfICmpsWithSameOperands	(	ICmpInst *	Op0,
		ICmpInst *	Op1
	)

static

Commuted variants are assumed to be handled by calling this function again with the parameters swapped.

Definition at line 1582 of file InstructionSimplify.cpp.

References B, getFalse(), llvm::CmpInst::getInversePredicate(), llvm::Value::getType(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_SGT, llvm::CmpInst::ICMP_SLT, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULT, llvm::CmpInst::isFalseWhenEqual(), llvm::CmpInst::isImpliedTrueByMatchingCmp(), llvm::PatternMatch::m_ICmp(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), and llvm::PatternMatch::match().

Referenced by simplifyAndOfICmps().

◆ simplifyAndOrOfCmps()

static Value* simplifyAndOrOfCmps	(	const SimplifyQuery &	Q,
		Value *	Op0,
		Value *	Op1,
		bool	IsAnd
	)

static

Definition at line 1958 of file InstructionSimplify.cpp.

References llvm::ConstantExpr::getCast(), simplifyAndOfICmps(), simplifyAndOrOfFCmps(), simplifyOrOfICmps(), and llvm::SimplifyQuery::TLI.

Referenced by SimplifyAndInst(), and SimplifyOrInst().

◆ simplifyAndOrOfFCmps()

static Value* simplifyAndOrOfFCmps	(	const TargetLibraryInfo *	TLI,
		FCmpInst *	LHS,
		FCmpInst *	RHS,
		bool	IsAnd
	)

static

Definition at line 1920 of file InstructionSimplify.cpp.

References llvm::CmpInst::FCMP_ORD, llvm::CmpInst::FCMP_UNO, llvm::Value::getType(), llvm::isKnownNeverNaN(), LHS, and RHS.

Referenced by simplifyAndOrOfCmps().

◆ simplifyAndOrOfICmpsWithConstants()

static Value* simplifyAndOrOfICmpsWithConstants	(	ICmpInst *	Cmp0,
		ICmpInst *	Cmp1,
		bool	IsAnd
	)

static

Test if a pair of compares with a shared operand and 2 constants has an empty set intersection, full set union, or if one compare is a superset of the other.

Definition at line 1634 of file InstructionSimplify.cpp.

References C1, getFalse(), llvm::User::getOperand(), llvm::CmpInst::getPredicate(), getTrue(), llvm::Value::getType(), llvm::PatternMatch::m_APInt(), llvm::ConstantRange::makeExactICmpRegion(), and llvm::PatternMatch::match().

Referenced by simplifyAndOfICmps(), and simplifyOrOfICmps().

◆ simplifyAndOrOfICmpsWithLimitConst()

static Value* simplifyAndOrOfICmpsWithLimitConst	(	ICmpInst *	Cmp0,
		ICmpInst *	Cmp1,
		bool	IsAnd
	)

static

Try to eliminate compares with signed or unsigned min/max constants.

Definition at line 1756 of file InstructionSimplify.cpp.

References llvm::APInt::getBitWidth(), llvm::CmpInst::getInversePredicate(), llvm::User::getOperand(), llvm::CmpInst::getPredicate(), llvm::APInt::getSignedMinValue(), llvm::ICmpInst::getUnsignedPredicate(), llvm::APInt::getZero(), llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULT, llvm::ICmpInst::isEquality(), llvm::APInt::isMaxValue(), llvm::APInt::isMinValue(), llvm::CmpInst::isSigned(), llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_c_ICmp(), llvm::PatternMatch::m_Not(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), std::swap(), and X.

Referenced by simplifyAndOfICmps(), and simplifyOrOfICmps().

◆ simplifyAndOrOfICmpsWithZero()

static Value* simplifyAndOrOfICmpsWithZero	(	ICmpInst *	Cmp0,
		ICmpInst *	Cmp1,
		bool	IsAnd
	)

static

Definition at line 1671 of file InstructionSimplify.cpp.

References llvm::User::getOperand(), llvm::CmpInst::getPredicate(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::PatternMatch::m_c_And(), llvm::PatternMatch::m_PtrToInt(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), X, and Y.

Referenced by simplifyAndOfICmps(), and simplifyOrOfICmps().

◆ SimplifyAShrInst()

static Value* SimplifyAShrInst	(	Value *	Op0,
		Value *	Op1,
		bool	isExact,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an AShr, see if we can fold the result.

If not, this returns null.

Definition at line 1439 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::ComputeNumSignBits(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::Constant::getAllOnesValue(), llvm::Type::getScalarSizeInBits(), llvm::Value::getType(), llvm::SimplifyQuery::IIQ, llvm::PatternMatch::m_AllOnes(), llvm::PatternMatch::m_NSWShl(), llvm::PatternMatch::m_Shl(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), SimplifyRightShift(), llvm::InstrInfoQuery::UseInstrInfo, and X.

Referenced by llvm::SimplifyAShrInst().

◆ SimplifyAssociativeBinOp()

static Value* SimplifyAssociativeBinOp	(	Instruction::BinaryOps	Opcode,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Generic simplifications for associative binary operations.

Returns the simpler value, or null if none was found.

Definition at line 296 of file InstructionSimplify.cpp.

References assert(), B, llvm::BinaryOperator::getOpcode(), llvm::User::getOperand(), llvm::Instruction::isAssociative(), llvm::Instruction::isCommutative(), LHS, RHS, llvm::SimplifyBinOp(), and llvm::RISCVFenceField::W.

Referenced by SimplifyAddInst(), SimplifyAndInst(), SimplifyMulInst(), SimplifyOrInst(), and SimplifyXorInst().

◆ simplifyBinaryIntrinsic()

static Value* simplifyBinaryIntrinsic	(	Function *	F,
		Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q
	)

static

Definition at line 5663 of file InstructionSimplify.cpp.

Referenced by simplifyIntrinsic().

◆ SimplifyBinOp() [1/2]

static Value * SimplifyBinOp	(	unsigned	Opcode,
		Value *	LHS,
		Value *	RHS,
		const FastMathFlags &	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a BinaryOperator, see if we can fold the result.

If not, this returns null. Try to use FastMathFlags when folding the result.

Definition at line 5432 of file InstructionSimplify.cpp.

References LHS, RHS, llvm::SimplifyBinOp(), llvm::SimplifyFAddInst(), llvm::SimplifyFDivInst(), llvm::SimplifyFMulInst(), and llvm::SimplifyFSubInst().

◆ SimplifyBinOp() [2/2]

static Value * SimplifyBinOp	(	unsigned	Opcode,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a BinaryOperator, see if we can fold the result.

If not, this returns null.

Definition at line 5385 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyBinOp().

◆ SimplifyCastInst()

static Value * SimplifyCastInst	(	unsigned	CastOpc,
		Value *	Op,
		Type *	Ty,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Definition at line 4763 of file InstructionSimplify.cpp.

References llvm::ConstantFoldCastOperand(), llvm::SimplifyQuery::DL, llvm::DataLayout::getIntPtrType(), llvm::CastInst::isEliminableCastPair(), and llvm::Type::isPtrOrPtrVectorTy().

Referenced by llvm::SimplifyCastInst().

◆ SimplifyCmpInst()

static Value * SimplifyCmpInst	(	unsigned	Predicate,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a CmpInst, see if we can fold the result.

Definition at line 5460 of file InstructionSimplify.cpp.

References llvm::CmpInst::isIntPredicate(), LHS, RHS, llvm::SimplifyFCmpInst(), and llvm::SimplifyICmpInst().

Referenced by llvm::SimplifyCmpInst().

◆ simplifyCmpSelCase()

static Value* simplifyCmpSelCase	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		Value *	Cond,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse,
		Constant *	TrueOrFalse
	)

static

Simplify comparison with true or false branch of select: sel = select i1 cond, i32 tv, i32 fv cmp = icmp sle i32 sel, rhs Compose new comparison by substituting sel with either tv or fv and see if it simplifies.

Definition at line 152 of file InstructionSimplify.cpp.

References Cond, isSameCompare(), LHS, RHS, and llvm::SimplifyCmpInst().

Referenced by simplifyCmpSelFalseCase(), and simplifyCmpSelTrueCase().

◆ simplifyCmpSelFalseCase()

static Value* simplifyCmpSelFalseCase	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		Value *	Cond,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Simplify comparison with false branch of select.

Definition at line 178 of file InstructionSimplify.cpp.

References Cond, getFalse(), LHS, RHS, and simplifyCmpSelCase().

Referenced by ThreadCmpOverSelect().

◆ simplifyCmpSelTrueCase()

static Value* simplifyCmpSelTrueCase	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		Value *	Cond,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Simplify comparison with true branch of select.

Definition at line 169 of file InstructionSimplify.cpp.

References Cond, getTrue(), LHS, RHS, and simplifyCmpSelCase().

Referenced by ThreadCmpOverSelect().

◆ simplifyDiv()

static Value* simplifyDiv	(	Instruction::BinaryOps	Opcode,
		Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

These are simplifications common to SDiv and UDiv.

Definition at line 1097 of file InstructionSimplify.cpp.

References C1, foldOrCommuteConstant(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::ConstantInt::getValue(), isDivZero(), llvm::PatternMatch::m_ConstantInt(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_SRem(), llvm::PatternMatch::m_UDiv(), llvm::PatternMatch::m_URem(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), simplifyDivRem(), ThreadBinOpOverPHI(), and ThreadBinOpOverSelect().

Referenced by SimplifySDivInst(), and SimplifyUDivInst().

◆ simplifyDivRem()

static Value* simplifyDivRem	(	Instruction::BinaryOps	Opcode,
		Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q
	)

static

Check for common or similar folds of integer division or integer remainder.

This applies to all 4 opcodes (sdiv/udiv/srem/urem).

Definition at line 945 of file InstructionSimplify.cpp.

Referenced by simplifyDiv(), and simplifyRem().

◆ SimplifyExtractElementInst()

static Value* SimplifyExtractElementInst	(	Value *	Vec,
		Value *	Idx,
		const SimplifyQuery &	Q,
		unsigned
	)

static

Given operands for an ExtractElementInst, see if we can fold the result.

If not, this returns null.

Definition at line 4683 of file InstructionSimplify.cpp.

References llvm::findScalarElement(), llvm::UndefValue::get(), llvm::PoisonValue::get(), llvm::ConstantExpr::getExtractElement(), llvm::getSplatValue(), llvm::Value::getType(), and llvm::SimplifyQuery::isUndefValue().

Referenced by llvm::SimplifyExtractElementInst().

◆ SimplifyExtractValueInst()

static Value* SimplifyExtractValueInst	(	Value *	Agg,
		ArrayRef< unsigned >	Idxs,
		const SimplifyQuery &	,
		unsigned
	)

static

Given operands for an ExtractValueInst, see if we can fold the result.

If not, this returns null.

Definition at line 4653 of file InstructionSimplify.cpp.

References llvm::ConstantFoldExtractValueInstruction(), llvm::min(), llvm::ArrayRef< T >::size(), and llvm::ArrayRef< T >::slice().

Referenced by llvm::SimplifyExtractValueInst().

◆ SimplifyFAddInst()

static Value* SimplifyFAddInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse,
		fp::ExceptionBehavior	ExBehavior = `fp::ebIgnore`,
		RoundingMode	Rounding = `RoundingMode::NearestTiesToEven`
	)

static

Given operands for an FAdd, see if we can fold the result.

If not, this returns null.

Definition at line 5056 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyFAddInst().

◆ SimplifyFCmpInst()

static Value* SimplifyFCmpInst	(	unsigned	Predicate,
		Value *	LHS,
		Value *	RHS,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an FCmpInst, see if we can fold the result.

If not, this returns null.

Definition at line 3806 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyFCmpInst().

◆ SimplifyFDivInst()

static Value* SimplifyFDivInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	,
		fp::ExceptionBehavior	ExBehavior = `fp::ebIgnore`,
		RoundingMode	Rounding = `RoundingMode::NearestTiesToEven`
	)

static

◆ SimplifyFMAFMul()

static Value* SimplifyFMAFMul	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse,
		fp::ExceptionBehavior	ExBehavior,
		RoundingMode	Rounding
	)

static

Definition at line 5169 of file InstructionSimplify.cpp.

References llvm::FastMathFlags::allowReassoc(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::isDefaultFPEnvironment(), llvm::PatternMatch::m_AnyZeroFP(), llvm::PatternMatch::m_FPOne(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), llvm::FastMathFlags::noNaNs(), llvm::FastMathFlags::noSignedZeros(), simplifyFPOp(), and X.

Referenced by llvm::SimplifyFMAFMul().

◆ SimplifyFMulInst()

static Value* SimplifyFMulInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse,
		fp::ExceptionBehavior	ExBehavior = `fp::ebIgnore`,
		RoundingMode	Rounding = `RoundingMode::NearestTiesToEven`
	)

static

Given the operands for an FMul, see if we can fold the result.

Definition at line 5209 of file InstructionSimplify.cpp.

References foldOrCommuteConstant(), llvm::isDefaultFPEnvironment(), and llvm::SimplifyFMAFMul().

Referenced by llvm::SimplifyFMulInst().

◆ simplifyFNegInst()

static Value* simplifyFNegInst	(	Value *	Op,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given the operand for an FNeg, see if we can fold the result.

If not, this returns null.

Definition at line 4984 of file InstructionSimplify.cpp.

References foldConstant(), llvm::PatternMatch::m_FNeg(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), and X.

Referenced by llvm::SimplifyFNegInst(), simplifyFPUnOp(), and simplifyUnOp().

◆ simplifyFPOp()

static Constant* simplifyFPOp	(	ArrayRef< Value * >	Ops,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		fp::ExceptionBehavior	ExBehavior,
		RoundingMode	Rounding
	)

static

Perform folds that are common to any floating-point operation.

This implies transforms based on poison/undef/NaN because the operation itself makes no difference to the result.

Definition at line 5015 of file InstructionSimplify.cpp.

References llvm::any_of(), llvm::fp::ebStrict, llvm::PoisonValue::get(), llvm::Intrinsic::getType(), llvm::Value::getType(), llvm::isDefaultFPEnvironment(), llvm::SimplifyQuery::isUndefValue(), llvm::PatternMatch::m_Inf(), llvm::PatternMatch::m_NaN(), llvm::PatternMatch::m_Poison(), llvm::PatternMatch::match(), llvm::FastMathFlags::noInfs(), llvm::FastMathFlags::noNaNs(), and propagateNaN().

Referenced by SimplifyFAddInst(), SimplifyFDivInst(), SimplifyFMAFMul(), SimplifyFRemInst(), SimplifyFSubInst(), and simplifyIntrinsic().

◆ simplifyFPUnOp()

static Value * simplifyFPUnOp	(	unsigned	Opcode,
		Value *	Op,
		const FastMathFlags &	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given the operand for a UnaryOperator, see if we can fold the result.

If not, this returns null. Try to use FastMathFlags when folding the result.

Definition at line 5363 of file InstructionSimplify.cpp.

References simplifyFNegInst(), and simplifyUnOp().

Referenced by llvm::SimplifyUnOp().

◆ SimplifyFreezeInst()

static Value* SimplifyFreezeInst	(	Value *	Op0,
		const SimplifyQuery &	Q
	)

static

Given operands for a Freeze, see if we can fold the result.

Definition at line 6161 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DT, and llvm::isGuaranteedNotToBeUndefOrPoison().

Referenced by llvm::SimplifyFreezeInst().

◆ SimplifyFRemInst()

static Value* SimplifyFRemInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	,
		fp::ExceptionBehavior	ExBehavior = `fp::ebIgnore`,
		RoundingMode	Rounding = `RoundingMode::NearestTiesToEven`
	)

static

Definition at line 5309 of file InstructionSimplify.cpp.

References foldOrCommuteConstant(), llvm::ConstantFP::getNegativeZero(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::isDefaultFPEnvironment(), llvm::PatternMatch::m_NegZeroFP(), llvm::PatternMatch::m_PosZeroFP(), llvm::PatternMatch::match(), llvm::FastMathFlags::noNaNs(), and simplifyFPOp().

Referenced by llvm::SimplifyFRemInst().

◆ SimplifyFSubInst()

static Value* SimplifyFSubInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse,
		fp::ExceptionBehavior	ExBehavior = `fp::ebIgnore`,
		RoundingMode	Rounding = `RoundingMode::NearestTiesToEven`
	)

static

Given operands for an FSub, see if we can fold the result.

If not, this returns null.

Definition at line 5118 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyFSubInst().

◆ SimplifyGEPInst()

static Value * SimplifyGEPInst	(	Type *	SrcTy,
		Value *	Ptr,
		ArrayRef< Value * >	Indices,
		bool	InBounds,
		const SimplifyQuery &	Q,
		unsigned
	)

static

Given operands for an GetElementPtrInst, see if we can fold the result.

If not, this returns null.

Definition at line 4445 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyGEPInst().

◆ SimplifyICmpInst()

static Value * SimplifyICmpInst	(	unsigned	Predicate,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an ICmpInst, see if we can fold the result.

If not, this returns null.

Definition at line 3511 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyICmpInst().

◆ simplifyICmpOfBools()

static Value* simplifyICmpOfBools	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q
	)

static

Fold an icmp when its operands have i1 scalar type.

For signed comparison, the values for an i1 are 0 and -1 respectively. This maps into a truth table of: LHS | RHS | LHS >=s RHS | LHS implies RHS 0 | 0 | 1 (0 >= 0) | 1 0 | 1 | 1 (0 >= -1) | 1 1 | 0 | 0 (-1 >= 0) | 0 1 | 1 | 1 (-1 >= -1) | 1

Definition at line 2732 of file InstructionSimplify.cpp.

Referenced by SimplifyICmpInst().

◆ simplifyICmpWithBinOp()

static Value* simplifyICmpWithBinOp	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

TODO: A large part of this logic is duplicated in InstCombine's foldICmpBinOp().

We should be able to share that and avoid the code duplication.

Definition at line 3116 of file InstructionSimplify.cpp.

Referenced by SimplifyICmpInst().

◆ simplifyICmpWithBinOpOnLHS()

static Value* simplifyICmpWithBinOpOnLHS	(	CmpInst::Predicate	Pred,
		BinaryOperator *	LBO,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Definition at line 2939 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, C1, llvm::computeKnownBits(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::APInt::getBitWidth(), GetCompareTy(), getFalse(), getTrue(), 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::isKnownNonZero(), llvm::KnownBits::isNegative(), llvm::KnownBits::isNonNegative(), LLVM_FALLTHROUGH, llvm_unreachable, llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_c_And(), llvm::PatternMatch::m_c_Or(), llvm::PatternMatch::m_LShr(), llvm::PatternMatch::m_Mul(), llvm::PatternMatch::m_Shl(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_UDiv(), llvm::PatternMatch::m_URem(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), RHS, and Y.

Referenced by simplifyICmpWithBinOp().

◆ simplifyICmpWithConstant()

static Value* simplifyICmpWithConstant	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const InstrInfoQuery &	IIQ
	)

static

Definition at line 2890 of file InstructionSimplify.cpp.

References llvm::computeConstantRange(), llvm::ConstantRange::contains(), llvm::ConstantInt::get(), GetCompareTy(), llvm::ConstantInt::getFalse(), llvm::ConstantInt::getTrue(), llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_SGT, llvm::CmpInst::ICMP_SLT, llvm::ConstantRange::inverse(), llvm::ConstantRange::isEmptySet(), llvm::ICmpInst::isEquality(), llvm::ConstantRange::isFullSet(), llvm::CmpInst::isSigned(), LHS, llvm::PatternMatch::m_AllOnes(), llvm::PatternMatch::m_APIntAllowUndef(), llvm::PatternMatch::m_BitCast(), llvm::PatternMatch::m_NSWMul(), llvm::PatternMatch::m_NUWMul(), llvm::PatternMatch::m_UIToFP(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::ConstantRange::makeExactICmpRegion(), llvm::PatternMatch::match(), RHS, llvm::APInt::srem(), llvm::APInt::urem(), llvm::InstrInfoQuery::UseInstrInfo, and X.

Referenced by SimplifyICmpInst().

◆ simplifyICmpWithDominatingAssume()

static Value* simplifyICmpWithDominatingAssume	(	CmpInst::Predicate	Predicate,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q
	)

static

Definition at line 3485 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::AssumptionCache::assumptionsFor(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::ConstantInt::get(), llvm::CallBase::getArgOperand(), GetCompareTy(), llvm::Instruction::getParent(), llvm::isImpliedCondition(), llvm::isValidAssumeForContext(), LHS, and RHS.

Referenced by SimplifyICmpInst().

◆ simplifyICmpWithMinMax()

static Value* simplifyICmpWithMinMax	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Simplify integer comparisons where at least one operand of the compare matches an integer min/max idiom.

Definition at line 3300 of file InstructionSimplify.cpp.

Referenced by SimplifyICmpInst().

◆ simplifyICmpWithZero()

static Value* simplifyICmpWithZero	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q
	)

static

Try hard to fold icmp with zero RHS because this is a common case.

Definition at line 2828 of file InstructionSimplify.cpp.

Referenced by SimplifyICmpInst().

◆ SimplifyInsertValueInst()

static Value* SimplifyInsertValueInst	(	Value *	Agg,
		Value *	Val,
		ArrayRef< unsigned >	Idxs,
		const SimplifyQuery &	Q,
		unsigned
	)

static

Given operands for an InsertValueInst, see if we can fold the result.

If not, this returns null.

Definition at line 4583 of file InstructionSimplify.cpp.

References llvm::ConstantFoldInsertValueInstruction(), llvm::Value::getType(), and llvm::SimplifyQuery::isUndefValue().

Referenced by llvm::SimplifyInsertValueInst().

◆ simplifyInstructionWithOperands()

static Value* simplifyInstructionWithOperands	(	Instruction *	I,
		ArrayRef< Value * >	NewOps,
		const SimplifyQuery &	SQ,
		OptimizationRemarkEmitter *	ORE
	)

static

See if we can compute a simplified version of this instruction.

If not, this returns null.

If called on unreachable code, the above logic may report that the instruction simplified to itself. Make life easier for users by detecting that case here, returning a safe value instead.

Definition at line 6200 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyInstruction(), and llvm::SimplifyInstructionWithOperands().

◆ simplifyIntrinsic()

static Value* simplifyIntrinsic	(	CallBase *	Call,
		const SimplifyQuery &	Q
	)

static

Definition at line 5925 of file InstructionSimplify.cpp.

References llvm::BitWidth, llvm::fp::ebIgnore, F, llvm::ConstantInt::get(), llvm::UndefValue::get(), llvm::Constant::getAllOnesValue(), llvm::APInt::getBitWidth(), llvm::Constant::getNullValue(), llvm::APInt::getOneBitSet(), llvm::APInt::isNonNegative(), llvm::SimplifyQuery::isUndefValue(), llvm::APInt::isZero(), llvm::PatternMatch::m_AllOnes(), llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_SpecificInt(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::maskIsAllZeroOrUndef(), llvm::PatternMatch::match(), llvm::NearestTiesToEven, simplifyBinaryIntrinsic(), llvm::SimplifyFAddInst(), llvm::SimplifyFDivInst(), llvm::SimplifyFMulInst(), simplifyFPOp(), llvm::SimplifyFRemInst(), llvm::SimplifyFSubInst(), simplifyUnaryIntrinsic(), std::swap(), llvm::APInt::urem(), and X.

Referenced by llvm::SimplifyCall().

◆ SimplifyLoadInst()

static Value* SimplifyLoadInst	(	LoadInst *	LI,
		Value *	PtrOp,
		const SimplifyQuery &	Q
	)

static

Definition at line 6173 of file InstructionSimplify.cpp.

References llvm::ConstantFoldLoadFromConstPtr(), llvm::SimplifyQuery::DL, llvm::DataLayout::getIndexTypeSizeInBits(), llvm::Value::getType(), llvm::getUnderlyingObject(), llvm::LoadInst::isVolatile(), Offset, and llvm::Value::stripAndAccumulateConstantOffsets().

Referenced by simplifyInstructionWithOperands().

◆ simplifyLogicOfAddSub()

static Value* simplifyLogicOfAddSub	(	Value *	Op0,
		Value *	Op1,
		Instruction::BinaryOps	Opcode
	)

static

Given a bitwise logic op, check if the operands are add/sub with a common source value and inverted constant (identity: C - X -> ~(X + ~C)).

Definition at line 1996 of file InstructionSimplify.cpp.

References assert(), C1, llvm::Constant::getAllOnesValue(), llvm::ConstantExpr::getNot(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::Instruction::isBitwiseLogicOp(), llvm::PatternMatch::m_Add(), llvm::PatternMatch::m_Constant(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Sub(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), and X.

Referenced by SimplifyAndInst(), SimplifyOrInst(), and SimplifyXorInst().

◆ SimplifyLShrInst()

static Value* SimplifyLShrInst	(	Value *	Op0,
		Value *	Op1,
		bool	isExact,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an LShr, see if we can fold the result.

If not, this returns null.

Definition at line 1402 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::computeKnownBits(), llvm::KnownBits::countMaxActiveBits(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_c_Or(), llvm::PatternMatch::m_NUWShl(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), SimplifyRightShift(), llvm::APInt::uge(), X, and Y.

Referenced by llvm::SimplifyLShrInst().

◆ SimplifyMulInst()

static Value* SimplifyMulInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a Mul, see if we can fold the result.

If not, this returns null.

Definition at line 881 of file InstructionSimplify.cpp.

References llvm::MCID::Add, expandCommutativeBinOp(), foldOrCommuteConstant(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::SimplifyQuery::IIQ, llvm::Type::isIntOrIntVectorTy(), llvm::SimplifyQuery::isUndefValue(), llvm::PatternMatch::m_Exact(), llvm::PatternMatch::m_IDiv(), llvm::PatternMatch::m_One(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), Mul, llvm::SimplifyAndInst(), SimplifyAssociativeBinOp(), ThreadBinOpOverPHI(), ThreadBinOpOverSelect(), llvm::InstrInfoQuery::UseInstrInfo, and X.

Referenced by llvm::SimplifyMulInst().

◆ SimplifyOrInst()

static Value * SimplifyOrInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an Or, see if we can fold the result.

If not, this returns null.

Definition at line 2292 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyOrInst().

◆ simplifyOrLogic()

static Value* simplifyOrLogic	(	Value *	X,
		Value *	Y
	)

static

Definition at line 2207 of file InstructionSimplify.cpp.

References assert(), B, llvm::Constant::getAllOnesValue(), llvm::PatternMatch::m_And(), llvm::PatternMatch::m_c_And(), llvm::PatternMatch::m_c_Or(), llvm::PatternMatch::m_c_Xor(), llvm::PatternMatch::m_CombineAnd(), llvm::PatternMatch::m_Not(), llvm::PatternMatch::m_NotForbidUndef(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Xor(), llvm::PatternMatch::match(), X, and Y.

Referenced by SimplifyOrInst().

◆ simplifyOrOfICmps()

static Value* simplifyOrOfICmps	(	ICmpInst *	Op0,
		ICmpInst *	Op1,
		const SimplifyQuery &	Q
	)

static

Definition at line 1891 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::IIQ, simplifyAndOrOfICmpsWithConstants(), simplifyAndOrOfICmpsWithLimitConst(), simplifyAndOrOfICmpsWithZero(), simplifyOrOfICmpsWithAdd(), simplifyOrOfICmpsWithSameOperands(), simplifyUnsignedRangeCheck(), and X.

Referenced by simplifyAndOrOfCmps().

◆ simplifyOrOfICmpsWithAdd()

static Value* simplifyOrOfICmpsWithAdd	(	ICmpInst *	Op0,
		ICmpInst *	Op1,
		const InstrInfoQuery &	IIQ
	)

static

◆ simplifyOrOfICmpsWithSameOperands()

static Value* simplifyOrOfICmpsWithSameOperands	(	ICmpInst *	Op0,
		ICmpInst *	Op1
	)

static

Commuted variants are assumed to be handled by calling this function again with the parameters swapped.

Definition at line 1607 of file InstructionSimplify.cpp.

References B, llvm::CmpInst::getInversePredicate(), getTrue(), llvm::Value::getType(), llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_SGE, llvm::CmpInst::ICMP_SLE, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_ULE, llvm::CmpInst::isImpliedTrueByMatchingCmp(), llvm::CmpInst::isTrueWhenEqual(), llvm::PatternMatch::m_ICmp(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), and llvm::PatternMatch::match().

Referenced by simplifyOrOfICmps().

◆ SimplifyPHINode()

static Value* SimplifyPHINode	(	PHINode *	PN,
		ArrayRef< Value * >	IncomingValues,
		const SimplifyQuery &	Q
	)

static

See if we can fold the given phi. If not, returns null.

Definition at line 4726 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::DT, llvm::UndefValue::get(), llvm::Value::getType(), llvm::SimplifyQuery::isUndefValue(), and valueDominatesPHI().

Referenced by llvm::SCEVExpander::replaceCongruentIVs(), and simplifyInstructionWithOperands().

◆ SimplifyRelativeLoad()

static Value* SimplifyRelativeLoad	(	Constant *	Ptr,
		Constant *	Offset,
		const DataLayout &	DL
	)

static

Definition at line 5490 of file InstructionSimplify.cpp.

References llvm::ConstantFoldLoadFromConstPtr(), DL, llvm::ConstantInt::get(), llvm::ConstantExpr::getBitCast(), llvm::Value::getContext(), llvm::ConstantExpr::getGetElementPtr(), llvm::Type::getInt32Ty(), llvm::Type::getInt64Ty(), llvm::Type::getInt8PtrTy(), llvm::User::getOperand(), llvm::Type::getPointerTo(), Int32Ty, llvm::IsConstantOffsetFromGlobal(), and Offset.

Referenced by simplifyBinaryIntrinsic().

◆ simplifyRem()

static Value* simplifyRem	(	Instruction::BinaryOps	Opcode,
		Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

These are simplifications common to SRem and URem.

Definition at line 1141 of file InstructionSimplify.cpp.

References foldOrCommuteConstant(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::SimplifyQuery::IIQ, isDivZero(), llvm::PatternMatch::m_NSWShl(), llvm::PatternMatch::m_NUWShl(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_SRem(), llvm::PatternMatch::m_URem(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), simplifyDivRem(), ThreadBinOpOverPHI(), ThreadBinOpOverSelect(), and llvm::InstrInfoQuery::UseInstrInfo.

Referenced by SimplifySRemInst(), and SimplifyURemInst().

◆ SimplifyRightShift()

static Value* SimplifyRightShift	(	Instruction::BinaryOps	Opcode,
		Value *	Op0,
		Value *	Op1,
		bool	isExact,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an Shl, LShr or AShr, see if we can fold the result.

If not, this returns null.

Definition at line 1341 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::computeKnownBits(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::SimplifyQuery::isUndefValue(), llvm::KnownBits::One, and SimplifyShift().

Referenced by SimplifyAShrInst(), and SimplifyLShrInst().

◆ SimplifySDivInst()

static Value* SimplifySDivInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an SDiv, see if we can fold the result.

If not, this returns null.

Definition at line 1185 of file InstructionSimplify.cpp.

References llvm::Constant::getAllOnesValue(), llvm::Value::getType(), llvm::isKnownNegation(), and simplifyDiv().

Referenced by llvm::SimplifySDivInst().

◆ simplifySelectBitTest()

static Value* simplifySelectBitTest	(	Value *	TrueVal,
		Value *	FalseVal,
		Value *	X,
		const APInt *	Y,
		bool	TrueWhenUnset
	)

static

Try to simplify a select instruction when its condition operand is an integer comparison where one operand of the compare is a constant.

Definition at line 4138 of file InstructionSimplify.cpp.

References llvm::tgtok::FalseVal, llvm::PatternMatch::m_And(), llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_Or(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::match(), llvm::tgtok::TrueVal, X, and Y.

Referenced by simplifySelectWithFakeICmpEq(), and simplifySelectWithICmpCond().

◆ SimplifySelectInst()

static Value * SimplifySelectInst	(	Value *	Cond,
		Value *	TrueVal,
		Value *	FalseVal,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a SelectInst, see if we can fold the result.

If not, this returns null.

Definition at line 4322 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, assert(), Cond, llvm::ConstantFoldSelectInstruction(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::tgtok::FalseVal, foldSelectWithBinaryOp(), llvm::ConstantVector::get(), llvm::PoisonValue::get(), llvm::Constant::getAggregateElement(), llvm::Value::getType(), i, llvm::isGuaranteedNotToBePoison(), llvm::isImpliedByDomCondition(), llvm::SimplifyQuery::isUndefValue(), llvm::PatternMatch::m_c_LogicalOr(), llvm::PatternMatch::m_Constant(), llvm::PatternMatch::m_Not(), llvm::PatternMatch::m_One(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::m_ZeroInt(), llvm::PatternMatch::match(), simplifySelectWithFCmp(), simplifySelectWithICmpCond(), llvm::tgtok::TrueVal, X, and Y.

Referenced by llvm::SimplifySelectInst().

◆ simplifySelectWithFakeICmpEq()

static Value* simplifySelectWithFakeICmpEq	(	Value *	CmpLHS,
		Value *	CmpRHS,
		ICmpInst::Predicate	Pred,
		Value *	TrueVal,
		Value *	FalseVal
	)

static

An alternative way to test if a bit is set or not uses sgt/slt instead of eq/ne.

Definition at line 4173 of file InstructionSimplify.cpp.

References llvm::decomposeBitTestICmp(), llvm::tgtok::FalseVal, llvm::CmpInst::ICMP_EQ, llvm::BitmaskEnumDetail::Mask(), simplifySelectBitTest(), llvm::tgtok::TrueVal, and X.

Referenced by simplifySelectWithICmpCond().

◆ simplifySelectWithFCmp()

static Value* simplifySelectWithFCmp	(	Value *	Cond,
		Value *	T,
		Value *	F,
		const SimplifyQuery &	Q
	)

static

Try to simplify a select instruction when its condition operand is a floating-point comparison.

Definition at line 4291 of file InstructionSimplify.cpp.

References Cond, llvm::SimplifyQuery::CxtI, F, llvm::CmpInst::FCMP_OEQ, llvm::CmpInst::FCMP_UNE, llvm::Instruction::hasNoSignedZeros(), llvm::PatternMatch::m_APFloat(), llvm::PatternMatch::m_FCmp(), llvm::PatternMatch::m_Specific(), and llvm::PatternMatch::match().

Referenced by SimplifySelectInst().

◆ simplifySelectWithICmpCond()

static Value* simplifySelectWithICmpCond	(	Value *	CondVal,
		Value *	TrueVal,
		Value *	FalseVal,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Try to simplify a select instruction when its condition operand is an integer comparison.

Definition at line 4187 of file InstructionSimplify.cpp.

Referenced by SimplifySelectInst().

◆ SimplifyShift()

static Value* SimplifyShift	(	Instruction::BinaryOps	Opcode,
		Value *	Op0,
		Value *	Op1,
		bool	IsNSW,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an Shl, LShr or AShr, see if we can fold the result.

If not, this returns null.

Definition at line 1271 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, assert(), llvm::computeKnownBits(), llvm::KnownBits::countMinTrailingZeros(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, foldOrCommuteConstant(), llvm::PoisonValue::get(), llvm::KnownBits::getBitWidth(), llvm::KnownBits::getMinValue(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::KnownBits::hasConflict(), isPoisonShift(), llvm::APInt::isSignBitSet(), llvm::Log2_32_Ceil(), llvm::PatternMatch::m_SExt(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), llvm::KnownBits::One, llvm::APInt::setSignBit(), llvm::KnownBits::shl(), ThreadBinOpOverPHI(), ThreadBinOpOverSelect(), llvm::APInt::uge(), X, and llvm::KnownBits::Zero.

Referenced by SimplifyRightShift(), and SimplifyShlInst().

◆ SimplifyShlInst()

static Value* SimplifyShlInst	(	Value *	Op0,
		Value *	Op1,
		bool	isNSW,
		bool	isNUW,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an Shl, see if we can fold the result.

If not, this returns null.

Definition at line 1369 of file InstructionSimplify.cpp.

References llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::SimplifyQuery::IIQ, llvm::SimplifyQuery::isUndefValue(), llvm::PatternMatch::m_Exact(), llvm::PatternMatch::m_Negative(), llvm::PatternMatch::m_Shr(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), SimplifyShift(), llvm::InstrInfoQuery::UseInstrInfo, and X.

Referenced by llvm::SimplifyShlInst().

◆ SimplifyShuffleVectorInst()

static Value* SimplifyShuffleVectorInst	(	Value *	Op0,
		Value *	Op1,
		ArrayRef< int >	Mask,
		Type *	RetTy,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Definition at line 4853 of file InstructionSimplify.cpp.

References llvm::all_of(), assert(), llvm::SmallVectorImpl< T >::assign(), llvm::ShuffleVectorInst::commuteShuffleMask(), foldIdentityShuffles(), llvm::ConstantVector::get(), llvm::UndefValue::get(), llvm::PoisonValue::get(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::ConstantExpr::getShuffleVector(), llvm::Value::getType(), llvm::ConstantInt::getZExtValue(), i, llvm::is_contained(), llvm::is_splat(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::SimplifyQuery::isUndefValue(), llvm::PatternMatch::m_Constant(), llvm::PatternMatch::m_ConstantInt(), llvm::PatternMatch::m_InsertElt(), llvm::PatternMatch::m_Value(), llvm::BitmaskEnumDetail::Mask(), llvm::PatternMatch::match(), std::swap(), and llvm::UndefMaskElem.

Referenced by llvm::SimplifyShuffleVectorInst().

◆ SimplifySRemInst()

static Value* SimplifySRemInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an SRem, see if we can fold the result.

If not, this returns null.

Definition at line 1211 of file InstructionSimplify.cpp.

References llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::isKnownNegation(), llvm::PatternMatch::m_SExt(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), simplifyRem(), and X.

Referenced by llvm::SimplifySRemInst().

◆ SimplifySubInst()

static Value* SimplifySubInst	(	Value *	Op0,
		Value *	Op1,
		bool	isNSW,
		bool	isNUW,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a Sub, see if we can fold the result.

If not, this returns null.

Definition at line 741 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, llvm::MCID::Add, llvm::computeKnownBits(), computePointerDifference(), llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, foldOrCommuteConstant(), llvm::UndefValue::get(), llvm::PoisonValue::get(), llvm::ConstantExpr::getIntegerCast(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::Type::isIntOrIntVectorTy(), llvm::APInt::isMaxSignedValue(), llvm::SimplifyQuery::isUndefValue(), llvm::PatternMatch::m_Add(), llvm::PatternMatch::m_PtrToInt(), llvm::PatternMatch::m_Sub(), llvm::PatternMatch::m_Trunc(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), llvm::SimplifyBinOp(), llvm::SimplifyCastInst(), llvm::SimplifyXorInst(), llvm::RISCVFenceField::W, X, Y, and llvm::KnownBits::Zero.

Referenced by llvm::SimplifySubInst().

◆ SimplifyUDivInst()

static Value* SimplifyUDivInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a UDiv, see if we can fold the result.

If not, this returns null.

Definition at line 1200 of file InstructionSimplify.cpp.

References simplifyDiv().

Referenced by llvm::SimplifyUDivInst().

◆ simplifyUnaryIntrinsic()

static Value* simplifyUnaryIntrinsic	(	Function *	F,
		Value *	Op0,
		const SimplifyQuery &	Q
	)

static

◆ simplifyUnOp()

static Value * simplifyUnOp	(	unsigned	Opcode,
		Value *	Op,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given the operand for a UnaryOperator, see if we can fold the result.

If not, this returns null.

Definition at line 5350 of file InstructionSimplify.cpp.

References llvm_unreachable, and simplifyFNegInst().

Referenced by simplifyFPUnOp(), and llvm::SimplifyUnOp().

◆ simplifyUnsignedRangeCheck()

static Value* simplifyUnsignedRangeCheck	(	ICmpInst *	ZeroICmp,
		ICmpInst *	UnsignedICmp,
		bool	IsAnd,
		const SimplifyQuery &	Q
	)

static

Commuted variants are assumed to be handled by calling this function again with the parameters swapped.

Definition at line 1472 of file InstructionSimplify.cpp.

References llvm::SimplifyQuery::AC, B, llvm::SimplifyQuery::CxtI, llvm::SimplifyQuery::DL, llvm::SimplifyQuery::DT, llvm::ConstantInt::getFalse(), getFalse(), llvm::CmpInst::getSwappedPredicate(), llvm::ConstantInt::getTrue(), getTrue(), llvm::Value::getType(), llvm::CmpInst::ICMP_EQ, llvm::CmpInst::ICMP_NE, llvm::CmpInst::ICMP_UGE, llvm::CmpInst::ICMP_UGT, llvm::CmpInst::ICMP_ULE, llvm::CmpInst::ICMP_ULT, llvm::ICmpInst::isEquality(), llvm::isKnownNonZero(), llvm::CmpInst::isUnsigned(), llvm::PatternMatch::m_c_ICmp(), llvm::PatternMatch::m_ICmp(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Sub(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), X, and Y.

Referenced by simplifyAndOfICmps(), and simplifyOrOfICmps().

◆ SimplifyURemInst()

static Value* SimplifyURemInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a URem, see if we can fold the result.

If not, this returns null.

Definition at line 1232 of file InstructionSimplify.cpp.

References simplifyRem().

Referenced by llvm::SimplifyURemInst().

◆ simplifyWithOpReplaced()

static Value* simplifyWithOpReplaced	(	Value *	V,
		Value *	Op,
		Value *	RepOp,
		const SimplifyQuery &	Q,
		bool	AllowRefinement,
		unsigned	MaxRecurse
	)

static

◆ SimplifyXorInst()

static Value * SimplifyXorInst	(	Value *	Op0,
		Value *	Op1,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for a Xor, see if we can fold the result.

If not, this returns null.

Definition at line 2416 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyXorInst().

◆ STATISTIC() [1/2]

STATISTIC	(	NumExpand	,
		"Number of expansions"
	)

◆ STATISTIC() [2/2]

STATISTIC	(	NumReassoc	,
		"Number of reassociations"
	)

◆ stripAndComputeConstantOffsets()

static Constant* stripAndComputeConstantOffsets	(	const DataLayout &	DL,
		Value *&	V,
		bool	AllowNonInbounds = `false`
	)

static

Compute the base pointer and cumulative constant offsets for V.

This strips all constant offsets off of V, leaving it the base pointer, and accumulates the total constant offset applied in the returned constant. It returns 0 if V is not a pointer, and returns the constant '0' if there are no constant offsets applied.

This is very similar to GetPointerBaseWithConstantOffset except it doesn't follow non-inbounds geps. This allows it to remain usable for icmp ult/etc. folding.

Definition at line 702 of file InstructionSimplify.cpp.

References assert(), DL, llvm::ConstantInt::get(), llvm::Type::getIntegerBitWidth(), llvm::ConstantVector::getSplat(), llvm::Value::getType(), llvm::APInt::getZero(), llvm::Type::isPtrOrPtrVectorTy(), Offset, and llvm::Value::stripAndAccumulateConstantOffsets().

Referenced by computePointerDifference(), and computePointerICmp().

◆ ThreadBinOpOverPHI()

static Value* ThreadBinOpOverPHI	(	Instruction::BinaryOps	Opcode,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

In the case of a binary operation with an operand that is a PHI instruction, try to simplify the binop by seeing whether evaluating it on the incoming phi values yields the same result for every value.

If so returns the common value, otherwise returns null.

Definition at line 520 of file InstructionSimplify.cpp.

References assert(), llvm::SimplifyQuery::DT, llvm::PHINode::incoming_values(), LHS, RHS, llvm::SimplifyBinOp(), and valueDominatesPHI().

Referenced by SimplifyAndInst(), simplifyDiv(), SimplifyMulInst(), SimplifyOrInst(), simplifyRem(), and SimplifyShift().

◆ ThreadBinOpOverSelect()

static Value* ThreadBinOpOverSelect	(	Instruction::BinaryOps	Opcode,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

In the case of a binary operation with a select instruction as an operand, try to simplify the binop by seeing whether evaluating it on both branches of the select results in the same value.

Returns the common value if so, otherwise returns null.

Definition at line 396 of file InstructionSimplify.cpp.

References assert(), llvm::SimplifyQuery::isUndefValue(), LHS, RHS, SI, llvm::JumpTable::Simplified, and llvm::SimplifyBinOp().

Referenced by SimplifyAndInst(), simplifyDiv(), SimplifyMulInst(), SimplifyOrInst(), simplifyRem(), and SimplifyShift().

◆ ThreadCmpOverPHI()

static Value* ThreadCmpOverPHI	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

In the case of a comparison with a PHI instruction, try to simplify the comparison by seeing whether comparing with all of the incoming phi values yields the same result every time.

If so returns the common result, otherwise returns null.

Definition at line 563 of file InstructionSimplify.cpp.

References assert(), llvm::SimplifyQuery::DT, llvm::numbers::e, llvm::PHINode::getIncomingBlock(), llvm::PHINode::getIncomingValue(), llvm::PHINode::getNumIncomingValues(), llvm::CmpInst::getSwappedPredicate(), llvm::BasicBlock::getTerminator(), llvm::SimplifyQuery::getWithInstruction(), LHS, RHS, llvm::SimplifyCmpInst(), std::swap(), and valueDominatesPHI().

Referenced by SimplifyFCmpInst(), and SimplifyICmpInst().

◆ ThreadCmpOverSelect()

static Value* ThreadCmpOverSelect	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS,
		const SimplifyQuery &	Q,
		unsigned	MaxRecurse
	)

static

In the case of a comparison with a select instruction, try to simplify the comparison by seeing whether both branches of the select result in the same value.

Returns the common value if so, otherwise returns null. For example, if we have: tmp = select i1 cmp, i32 1, i32 2 cmp1 = icmp sle i32 tmp, 3 We can simplify cmp1 to true, because both branches of select are less than 3. We compose new comparison by substituting tmp with both branches of select and see if it can be simplified.

Definition at line 474 of file InstructionSimplify.cpp.

References assert(), Cond, llvm::CmpInst::getSwappedPredicate(), llvm::Value::getType(), handleOtherCmpSelSimplifications(), llvm::Type::isVectorTy(), LHS, RHS, SI, simplifyCmpSelFalseCase(), simplifyCmpSelTrueCase(), and std::swap().

Referenced by SimplifyFCmpInst(), and SimplifyICmpInst().

◆ tryConstantFoldCall()

static Value* tryConstantFoldCall	(	CallBase *	Call,
		const SimplifyQuery &	Q
	)

static

Definition at line 6116 of file InstructionSimplify.cpp.

References Arg, llvm::canConstantFoldCallTo(), llvm::ConstantFoldCall(), F, llvm::SmallVectorImpl< T >::reserve(), and llvm::SimplifyQuery::TLI.

Referenced by llvm::SimplifyCall().

◆ trySimplifyICmpWithAdds()

static bool trySimplifyICmpWithAdds	(	CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS
	)

static

Definition at line 3090 of file InstructionSimplify.cpp.

References C1, llvm::CmpInst::ICMP_SLT, LHS, llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_c_Add(), llvm::PatternMatch::m_NSWAdd(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), RHS, llvm::APInt::slt(), std::swap(), and X.

Referenced by simplifyICmpWithBinOp().

◆ valueDominatesPHI()

static bool valueDominatesPHI	(	Value *	V,
		PHINode *	P,
		const DominatorTree *	DT
	)

static

Does the given value dominate the specified phi node?

Definition at line 216 of file InstructionSimplify.cpp.

References llvm::DominatorTree::dominates(), I, and P.

Referenced by SimplifyPHINode(), ThreadBinOpOverPHI(), and ThreadCmpOverPHI().

Namespaces

Macros

Enumerations

Functions

Macro Definition Documentation

◆ DEBUG_TYPE

◆ HANDLE_CAST_INST

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ canIgnoreSNaN()

◆ computePointerDifference()

◆ computePointerICmp()

◆ expandBinOp()

◆ expandCommutativeBinOp()

◆ ExtractEquivalentCondition()

◆ foldConstant()

◆ foldIdentityShuffles()

◆ foldMinMaxSharedOp()

◆ foldOrCommuteConstant()

◆ foldSelectWithBinaryOp()

◆ GetCompareTy()

◆ getFalse()

◆ getTrue()

◆ handleOtherCmpSelSimplifications()

◆ isDivZero()

◆ isICmpTrue()

◆ IsIdempotent()

◆ isPoisonShift()

◆ isSameCompare()

◆ propagateNaN()

◆ replaceAndRecursivelySimplifyImpl()

◆ SimplifyAddInst()

◆ SimplifyAndInst()

◆ simplifyAndOfICmps()

◆ simplifyAndOfICmpsWithAdd()

◆ simplifyAndOfICmpsWithSameOperands()

◆ simplifyAndOrOfCmps()

◆ simplifyAndOrOfFCmps()

◆ simplifyAndOrOfICmpsWithConstants()

◆ simplifyAndOrOfICmpsWithLimitConst()

◆ simplifyAndOrOfICmpsWithZero()

◆ SimplifyAShrInst()

◆ SimplifyAssociativeBinOp()

◆ simplifyBinaryIntrinsic()

◆ SimplifyBinOp() [1/2]

◆ SimplifyBinOp() [2/2]

◆ SimplifyCastInst()

◆ SimplifyCmpInst()

◆ simplifyCmpSelCase()

◆ simplifyCmpSelFalseCase()

◆ simplifyCmpSelTrueCase()

◆ simplifyDiv()

◆ simplifyDivRem()

◆ SimplifyExtractElementInst()

◆ SimplifyExtractValueInst()

◆ SimplifyFAddInst()

◆ SimplifyFCmpInst()

◆ SimplifyFDivInst()

◆ SimplifyFMAFMul()

◆ SimplifyFMulInst()

◆ simplifyFNegInst()

◆ simplifyFPOp()

◆ simplifyFPUnOp()

◆ SimplifyFreezeInst()

◆ SimplifyFRemInst()

◆ SimplifyFSubInst()

◆ SimplifyGEPInst()

◆ SimplifyICmpInst()

◆ simplifyICmpOfBools()

◆ simplifyICmpWithBinOp()

◆ simplifyICmpWithBinOpOnLHS()

◆ simplifyICmpWithConstant()

◆ simplifyICmpWithDominatingAssume()

◆ simplifyICmpWithMinMax()

◆ simplifyICmpWithZero()

◆ SimplifyInsertValueInst()

◆ simplifyInstructionWithOperands()

◆ simplifyIntrinsic()

◆ SimplifyLoadInst()