#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Analysis/MemoryBuiltins.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/Operator.h"
#include "llvm/Support/ConstantRange.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/PatternMatch.h"
#include "llvm/Support/ValueHandle.h"

Include dependency graph for InstructionSimplify.cpp:

Classes
struct	Query

Macros
#define	DEBUG_TYPE "instsimplify"

Enumerations
enum	{ RecursionLimit = 3 }

Functions
	STATISTIC (NumExpand,"Number of expansions")

	STATISTIC (NumFactor,"Number of factorizations")

	STATISTIC (NumReassoc,"Number of reassociations")

static Value *	SimplifyAndInst (Value , Value , const Query &, unsigned)

static Value *	SimplifyBinOp (unsigned, Value , Value , const Query &, unsigned)

static Value *	SimplifyCmpInst (unsigned, Value , Value , const Query &, unsigned)

static Value *	SimplifyOrInst (Value , Value , const Query &, unsigned)

static Value *	SimplifyXorInst (Value , Value , const Query &, unsigned)

static Value *	SimplifyTruncInst (Value , Type , const Query &, unsigned)

static Constant *	getFalse (Type *Ty)

static Constant *	getTrue (Type *Ty)

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

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

static Value *	ExpandBinOp (unsigned Opcode, Value LHS, Value RHS, unsigned OpcToExpand, const Query &Q, unsigned MaxRecurse)

static Value *	FactorizeBinOp (unsigned Opcode, Value LHS, Value RHS, unsigned OpcToExtract, const Query &Q, unsigned MaxRecurse)

static Value *	SimplifyAssociativeBinOp (unsigned Opc, Value LHS, Value RHS, const Query &Q, unsigned MaxRecurse)

static Value *	ThreadBinOpOverSelect (unsigned Opcode, Value LHS, Value RHS, const Query &Q, unsigned MaxRecurse)

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

static Value *	ThreadBinOpOverPHI (unsigned Opcode, Value LHS, Value RHS, const Query &Q, unsigned MaxRecurse)

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

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

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

static Constant *	computePointerDifference (const DataLayout TD, Value LHS, Value *RHS)
	Compute the constant difference between two pointer values. If the difference is not a constant, returns zero. More...

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

static Value *	SimplifyFAddInst (Value Op0, Value Op1, FastMathFlags FMF, const Query &Q, unsigned MaxRecurse)

static Value *	SimplifyFSubInst (Value Op0, Value Op1, FastMathFlags FMF, const Query &Q, unsigned MaxRecurse)

static Value *	SimplifyFMulInst (Value Op0, Value Op1, FastMathFlags FMF, const Query &Q, unsigned MaxRecurse)
	Given the operands for an FMul, see if we can fold the result. More...

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

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

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

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

static Value *	SimplifyFDivInst (Value Op0, Value Op1, const Query &Q, unsigned)

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

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

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

static Value *	SimplifyFRemInst (Value Op0, Value Op1, const Query &, unsigned)

static Value *	SimplifyShift (unsigned Opcode, Value Op0, Value Op1, const Query &Q, unsigned MaxRecurse)

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

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

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

static Type *	GetCompareTy (Value *Op)

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

static Constant *	computePointerICmp (const DataLayout TD, const TargetLibraryInfo TLI, CmpInst::Predicate Pred, Value LHS, Value RHS)

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

static Value *	SimplifyFCmpInst (unsigned Predicate, Value LHS, Value RHS, const Query &Q, unsigned MaxRecurse)

static Value *	SimplifySelectInst (Value CondVal, Value TrueVal, Value *FalseVal, const Query &Q, unsigned MaxRecurse)

static Value *	SimplifyGEPInst (ArrayRef< Value * > Ops, const Query &Q, unsigned)

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

static Value *	SimplifyPHINode (PHINode *PN, const Query &Q)
	SimplifyPHINode - See if we can fold the given phi. If not, returns null. More...

static bool	IsIdempotent (Intrinsic::ID ID)

template<typename IterTy >
static Value *	SimplifyIntrinsic (Intrinsic::ID IID, IterTy ArgBegin, IterTy ArgEnd, const Query &Q, unsigned MaxRecurse)

template<typename IterTy >
static Value *	SimplifyCall (Value *V, IterTy ArgBegin, IterTy ArgEnd, const Query &Q, unsigned MaxRecurse)

static bool	replaceAndRecursivelySimplifyImpl (Instruction I, Value SimpleV, const DataLayout TD, const TargetLibraryInfo TLI, const DominatorTree *DT)
	Implementation of recursive simplification through an instructions uses. More...

Macro Definition Documentation

#define DEBUG_TYPE "instsimplify"

Definition at line 20 of file InstructionSimplify.cpp.

Enumeration Type Documentation

anonymous enum

Enumerator
RecursionLimit

Definition at line 38 of file InstructionSimplify.cpp.

Function Documentation

static Constant* computePointerDifference	(	const DataLayout *	TD,
		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 715 of file InstructionSimplify.cpp.

References llvm::ConstantExpr::getSub(), and stripAndComputeConstantOffsets().

Referenced by SimplifySubInst().

static Constant* computePointerICmp	(	const DataLayout *	TD,
		const TargetLibraryInfo *	TLI,
		CmpInst::Predicate	Pred,
		Value *	LHS,
		Value *	RHS
	)

static

static Value* ExpandBinOp	(	unsigned	Opcode,
		Value *	LHS,
		Value *	RHS,
		unsigned	OpcToExpand,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

ExpandBinOp - Simplify "A op (B op' C)" by distributing op over op', turning it into "(A op B) op' (A op C)". Here "op" is given by Opcode and "op'" is given by OpcodeToExpand, while "A" corresponds to LHS and "B op' C" to RHS. Also performs the transform "(A op' B) op C" -> "(A op C) op' (B op C)". Returns the simplified value, or null if no simplification was performed.

Definition at line 128 of file InstructionSimplify.cpp.

References llvm::ARM_PROC::A, llvm::CallingConv::C, llvm::Instruction::isCommutative(), and llvm::SimplifyBinOp().

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

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

static

ExtractEquivalentCondition - 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 1688 of file InstructionSimplify.cpp.

References llvm::dyn_cast(), llvm::SelectInst::getCondition(), llvm::User::getOperand(), llvm::CmpInst::getPredicate(), and llvm::CmpInst::getSwappedPredicate().

Referenced by SimplifyICmpInst().

static Value* FactorizeBinOp	(	unsigned	Opcode,
		Value *	LHS,
		Value *	RHS,
		unsigned	OpcToExtract,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

FactorizeBinOp - Simplify "LHS Opcode RHS" by factorizing out a common term using the operation OpCodeToExtract. For example, when Opcode is Add and OpCodeToExtract is Mul then this tries to turn "(A*B)+(A*C)" into "A*(B+C)". Returns the simplified value, or null if no simplification was performed.

Definition at line 189 of file InstructionSimplify.cpp.

References llvm::ARM_PROC::A, llvm::CallingConv::C, llvm::X86II::DD, llvm::dyn_cast(), llvm::BinaryOperator::getOpcode(), llvm::User::getOperand(), llvm::Instruction::isCommutative(), and llvm::SimplifyBinOp().

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

static Type* GetCompareTy ( Value * Op )

static

Definition at line 1681 of file InstructionSimplify.cpp.

References llvm::Value::getType(), and llvm::CmpInst::makeCmpResultType().

Referenced by computePointerICmp(), SimplifyFCmpInst(), and SimplifyICmpInst().

static Constant* getFalse ( Type * Ty )

static

getFalse - For a boolean type, or a vector of boolean type, return false, or a vector with every element false, as appropriate for the type.

Definition at line 64 of file InstructionSimplify.cpp.

References llvm::Constant::getNullValue(), llvm::Type::getScalarType(), and llvm::Type::isIntegerTy().

Referenced by SimplifyICmpInst(), and ThreadCmpOverSelect().

static Constant* getTrue ( Type * Ty )

static

getTrue - For a boolean type, or a vector of boolean type, return true, or a vector with every element true, as appropriate for the type.

Definition at line 72 of file InstructionSimplify.cpp.

References llvm::Constant::getAllOnesValue(), llvm::Type::getScalarType(), and llvm::Type::isIntegerTy().

Referenced by SimplifyICmpInst(), and ThreadCmpOverSelect().

static bool IsIdempotent ( Intrinsic::ID ID )

static

Definition at line 2951 of file InstructionSimplify.cpp.

References llvm::Intrinsic::ceil, llvm::Intrinsic::fabs, llvm::Intrinsic::floor, llvm::Intrinsic::nearbyint, llvm::Intrinsic::rint, llvm::Intrinsic::round, and llvm::Intrinsic::trunc.

Referenced by SimplifyIntrinsic().

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 79 of file InstructionSimplify.cpp.

References llvm::dyn_cast(), llvm::User::getOperand(), llvm::CmpInst::getPredicate(), and llvm::CmpInst::getSwappedPredicate().

Referenced by ThreadCmpOverSelect().

static bool replaceAndRecursivelySimplifyImpl	(	Instruction *	I,
		Value *	SimpleV,
		const DataLayout *	TD,
		const TargetLibraryInfo *	TLI,
		const DominatorTree *	DT
	)

static

Implementation of recursive simplification through an instructions 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.

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

Definition at line 3170 of file InstructionSimplify.cpp.

References llvm::Instruction::eraseFromParent(), llvm::Instruction::getParent(), llvm::SetVector< T, SmallVector< T, N >, SmallSet< T, N > >::insert(), llvm::Value::replaceAllUsesWith(), llvm::SimplifyInstruction(), llvm::SetVector< T, SmallVector< T, N >, SmallSet< T, N > >::size(), llvm::Value::use_begin(), and llvm::Value::use_end().

Referenced by llvm::recursivelySimplifyInstruction(), and llvm::replaceAndRecursivelySimplify().

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

static

SimplifyAddInst - Given operands for an Add, see if we can fold the result. If not, this returns null.

i1 add -> xor.

Definition at line 592 of file InstructionSimplify.cpp.

References llvm::ConstantFoldInstOperands(), FactorizeBinOp(), llvm::Constant::getAllOnesValue(), llvm::Value::getType(), llvm::Type::isIntegerTy(), llvm::PatternMatch::m_Not(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Sub(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), SimplifyAssociativeBinOp(), llvm::SimplifyXorInst(), std::swap(), Query::TD, Query::TLI, and Y.

Referenced by llvm::SimplifyAddInst().

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

static

SimplifyAndInst - Given operands for an And, see if we can fold the result. If not, this returns null.

Definition at line 1430 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyAndInst().

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

static

SimplifyAShrInst - Given operands for an AShr, see if we can fold the result. If not, this returns null.

Definition at line 1394 of file InstructionSimplify.cpp.

References llvm::Constant::getAllOnesValue(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::PatternMatch::m_AllOnes(), llvm::PatternMatch::m_Shl(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), SimplifyShift(), and llvm::X.

Referenced by llvm::SimplifyAShrInst().

static Value* SimplifyAssociativeBinOp	(	unsigned	Opc,
		Value *	LHS,
		Value *	RHS,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

SimplifyAssociativeBinOp - Generic simplifications for associative binary operations. Returns the simpler value, or null if none was found.

Definition at line 259 of file InstructionSimplify.cpp.

References llvm::ARM_PROC::A, llvm::CallingConv::C, llvm::dyn_cast(), llvm::BinaryOperator::getOpcode(), llvm::User::getOperand(), llvm::Instruction::isAssociative(), llvm::Instruction::isCommutative(), and llvm::SimplifyBinOp().

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

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

static

SimplifyBinOp - Given operands for a BinaryOperator, see if we can fold the result. If not, this returns null.

Definition at line 2866 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyBinOp().

template<typename IterTy >

static Value* SimplifyCall	(	Value *	V,
		IterTy	ArgBegin,
		IterTy	ArgEnd,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

Definition at line 2984 of file InstructionSimplify.cpp.

References llvm::CallingConv::C, llvm::canConstantFoldCallTo(), llvm::ConstantFoldCall(), llvm::dyn_cast(), F(), llvm::UndefValue::get(), llvm::Function::getIntrinsicID(), llvm::FunctionType::getReturnType(), llvm::Value::getType(), I, llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::SmallVectorImpl< T >::reserve(), llvm::AArch64ISD::Ret, SimplifyIntrinsic(), and Query::TLI.

Referenced by llvm::SimplifyCall().

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

static

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

Definition at line 2937 of file InstructionSimplify.cpp.

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

Referenced by llvm::SimplifyCmpInst().

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

static

SimplifyDiv - Given operands for an SDiv or UDiv, see if we can fold the result. If not, this returns null.

Definition at line 1065 of file InstructionSimplify.cpp.

Referenced by SimplifySDivInst(), and SimplifyUDivInst().

static Value* SimplifyFAddInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an FAdd, see if we can fold the result. If not, this returns null.

Definition at line 868 of file InstructionSimplify.cpp.

References llvm::CannotBeNegativeZero(), llvm::ConstantFoldInstOperands(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::Instruction::hasNoInfs(), llvm::Instruction::hasNoNaNs(), llvm::PatternMatch::m_AnyZero(), llvm::PatternMatch::m_FSub(), llvm::PatternMatch::m_NegZero(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), llvm::FastMathFlags::noInfs(), llvm::FastMathFlags::noNaNs(), llvm::FastMathFlags::noSignedZeros(), std::swap(), Query::TD, and Query::TLI.

Referenced by llvm::SimplifyFAddInst().

static Value* SimplifyFCmpInst	(	unsigned	Predicate,
		Value *	LHS,
		Value *	RHS,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

SimplifyFCmpInst - Given operands for an FCmpInst, see if we can fold the result. If not, this returns null.

Definition at line 2600 of file InstructionSimplify.cpp.

References llvm::ConstantFoldCompareInstOperands(), llvm::CmpInst::FCMP_FALSE, llvm::CmpInst::FCMP_OGT, llvm::CmpInst::FCMP_OLT, llvm::CmpInst::FCMP_TRUE, llvm::CmpInst::FCMP_UGE, llvm::CmpInst::FCMP_ULE, llvm::ConstantInt::get(), llvm::UndefValue::get(), GetCompareTy(), llvm::ConstantInt::getFalse(), llvm::CmpInst::getSwappedPredicate(), llvm::ConstantInt::getTrue(), llvm::CmpInst::isFalseWhenEqual(), llvm::CmpInst::isFPPredicate(), llvm::CmpInst::isOrdered(), llvm::CmpInst::isTrueWhenEqual(), llvm::CmpInst::isUnordered(), std::swap(), Query::TD, ThreadCmpOverPHI(), ThreadCmpOverSelect(), and Query::TLI.

Referenced by llvm::SimplifyFCmpInst().

static Value* SimplifyFDivInst	(	Value *	Op0,
		Value *	Op1,
		const Query &	Q,
		unsigned
	)

static

Definition at line 1167 of file InstructionSimplify.cpp.

References llvm::PatternMatch::m_Undef(), and llvm::PatternMatch::match().

Referenced by llvm::SimplifyFDivInst().

static Value* SimplifyFMulInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

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

Definition at line 946 of file InstructionSimplify.cpp.

References llvm::ConstantFoldInstOperands(), llvm::PatternMatch::m_AnyZero(), llvm::PatternMatch::m_FPOne(), llvm::PatternMatch::match(), llvm::FastMathFlags::noNaNs(), llvm::FastMathFlags::noSignedZeros(), std::swap(), Query::TD, and Query::TLI.

Referenced by llvm::SimplifyFMulInst().

static Value* SimplifyFRemInst	(	Value *	Op0,
		Value *	Op1,
		const Query &	,
		unsigned
	)

static

Definition at line 1272 of file InstructionSimplify.cpp.

References llvm::PatternMatch::m_Undef(), and llvm::PatternMatch::match().

Referenced by llvm::SimplifyFRemInst().

static Value* SimplifyFSubInst	(	Value *	Op0,
		Value *	Op1,
		FastMathFlags	FMF,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

Given operands for an FSub, see if we can fold the result. If not, this returns null.

Definition at line 910 of file InstructionSimplify.cpp.

References llvm::CannotBeNegativeZero(), llvm::ConstantFoldInstOperands(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::PatternMatch::m_AnyZero(), llvm::PatternMatch::m_FSub(), llvm::PatternMatch::m_NegZero(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), llvm::FastMathFlags::noInfs(), llvm::FastMathFlags::noNaNs(), llvm::FastMathFlags::noSignedZeros(), Query::TD, Query::TLI, and llvm::X.

Referenced by llvm::SimplifyFSubInst().

static Value* SimplifyGEPInst	(	ArrayRef< Value * >	Ops,
		const Query &	Q,
		unsigned
	)

static

SimplifyGEPInst - Given operands for an GetElementPtrInst, see if we can fold the result. If not, this returns null.

Definition at line 2732 of file InstructionSimplify.cpp.

References llvm::CallingConv::C, llvm::dyn_cast(), llvm::PointerType::get(), llvm::UndefValue::get(), llvm::PointerType::getAddressSpace(), llvm::SequentialType::getElementType(), llvm::ConstantExpr::getGetElementPtr(), llvm::GetElementPtrInst::getIndexedType(), llvm::DataLayout::getTypeAllocSize(), llvm::Type::isSized(), llvm::ArrayRef< T >::size(), llvm::ArrayRef< T >::slice(), and Query::TD.

Referenced by llvm::SimplifyGEPInst().

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

static

SimplifyICmpInst - Given operands for an ICmpInst, see if we can fold the result. If not, this returns null.

Definition at line 1861 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyICmpInst().

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

static

SimplifyInsertValueInst - Given operands for an InsertValueInst, see if we can fold the result. If not, this returns null.

Definition at line 2779 of file InstructionSimplify.cpp.

References llvm::ConstantFoldInsertValueInstruction(), llvm::Value::getType(), llvm::PatternMatch::m_Undef(), and llvm::PatternMatch::match().

Referenced by llvm::SimplifyInsertValueInst().

template<typename IterTy >

static Value* SimplifyIntrinsic	(	Intrinsic::ID	IID,
		IterTy	ArgBegin,
		IterTy	ArgEnd,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

Definition at line 2968 of file InstructionSimplify.cpp.

References IsIdempotent().

Referenced by SimplifyCall().

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

static

SimplifyLShrInst - Given operands for an LShr, see if we can fold the result. If not, this returns null.

Definition at line 1362 of file InstructionSimplify.cpp.

References llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::PatternMatch::m_Shl(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), SimplifyShift(), and llvm::X.

Referenced by llvm::SimplifyLShrInst().

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

static

SimplifyMulInst - Given operands for a Mul, see if we can fold the result. If not, this returns null.

Definition at line 974 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyMulInst().

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

static

SimplifyOrInst - Given operands for an Or, see if we can fold the result. If not, this returns null.

Definition at line 1529 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifyOrInst().

static Value* SimplifyPHINode	(	PHINode *	PN,
		const Query &	Q
	)

static

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

Definition at line 2816 of file InstructionSimplify.cpp.

References Query::DT, llvm::UndefValue::get(), llvm::PHINode::getIncomingValue(), llvm::PHINode::getNumIncomingValues(), llvm::Value::getType(), and ValueDominatesPHI().

Referenced by llvm::SimplifyInstruction().

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

static

SimplifyRem - Given operands for an SRem or URem, see if we can fold the result. If not, this returns null.

Definition at line 1188 of file InstructionSimplify.cpp.

References llvm::ConstantFoldInstOperands(), llvm::UndefValue::get(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::Type::isIntegerTy(), llvm::PatternMatch::m_One(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), Query::TD, ThreadBinOpOverPHI(), ThreadBinOpOverSelect(), and Query::TLI.

Referenced by SimplifySRemInst(), and SimplifyURemInst().

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

static

SimplifySDivInst - Given operands for an SDiv, see if we can fold the result. If not, this returns null.

Definition at line 1137 of file InstructionSimplify.cpp.

References SimplifyDiv().

Referenced by llvm::SimplifySDivInst().

static Value* SimplifySelectInst	(	Value *	CondVal,
		Value *	TrueVal,
		Value *	FalseVal,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

SimplifySelectInst - Given operands for a SelectInst, see if we can fold the result. If not, this returns null.

Definition at line 2697 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifySelectInst().

static Value* SimplifyShift	(	unsigned	Opcode,
		Value *	Op0,
		Value *	Op1,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

SimplifyShift - Given operands for an Shl, LShr or AShr, see if we can fold the result. If not, this returns null.

Definition at line 1293 of file InstructionSimplify.cpp.

References llvm::ConstantFoldInstOperands(), llvm::UndefValue::get(), llvm::Type::getScalarSizeInBits(), llvm::Value::getType(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), Query::TD, ThreadBinOpOverPHI(), ThreadBinOpOverSelect(), and Query::TLI.

Referenced by SimplifyAShrInst(), SimplifyLShrInst(), and SimplifyShlInst().

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

static

SimplifyShlInst - Given operands for an Shl, see if we can fold the result. If not, this returns null.

Definition at line 1337 of file InstructionSimplify.cpp.

References llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::PatternMatch::m_Exact(), llvm::PatternMatch::m_Shr(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), SimplifyShift(), and llvm::X.

Referenced by llvm::SimplifyShlInst().

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

static

SimplifySRemInst - Given operands for an SRem, see if we can fold the result. If not, this returns null.

Definition at line 1242 of file InstructionSimplify.cpp.

References SimplifyRem().

Referenced by llvm::SimplifySRemInst().

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

static

SimplifySubInst - Given operands for a Sub, see if we can fold the result. If not, this returns null.

Definition at line 734 of file InstructionSimplify.cpp.

Referenced by llvm::SimplifySubInst().

static Value * SimplifyTruncInst	(	Value *	Op,
		Type *	Ty,
		const Query &	Q,
		unsigned
	)

static

Definition at line 2849 of file InstructionSimplify.cpp.

References llvm::CallingConv::C, llvm::ConstantFoldInstOperands(), Query::TD, and Query::TLI.

Referenced by llvm::SimplifyTruncInst().

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

static

SimplifyUDivInst - Given operands for a UDiv, see if we can fold the result. If not, this returns null.

Definition at line 1153 of file InstructionSimplify.cpp.

References SimplifyDiv().

Referenced by llvm::SimplifyUDivInst().

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

static

SimplifyURemInst - Given operands for a URem, see if we can fold the result. If not, this returns null.

Definition at line 1258 of file InstructionSimplify.cpp.

References SimplifyRem().

Referenced by llvm::SimplifyURemInst().

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

static

SimplifyXorInst - Given operands for a Xor, see if we can fold the result. If not, this returns null.

Definition at line 1623 of file InstructionSimplify.cpp.

References llvm::APIntOps::And(), llvm::ConstantFoldInstOperands(), FactorizeBinOp(), llvm::Constant::getAllOnesValue(), llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::PatternMatch::m_Not(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Undef(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), SimplifyAssociativeBinOp(), std::swap(), Query::TD, Query::TLI, and llvm::APIntOps::Xor().

Referenced by llvm::SimplifyXorInst().

STATISTIC	(	NumExpand	,
		"Number of expansions"
	)

STATISTIC	(	NumFactor	,
		"Number of factorizations"
	)

STATISTIC	(	NumReassoc	,
		"Number of reassociations"
	)

static Constant* stripAndComputeConstantOffsets	(	const DataLayout *	TD,
		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 670 of file InstructionSimplify.cpp.

References llvm::IntegerType::get(), llvm::ConstantInt::get(), llvm::Value::getContext(), llvm::Type::getIntegerBitWidth(), llvm::DataLayout::getIntPtrType(), llvm::APInt::getNullValue(), llvm::Operator::getOpcode(), llvm::Type::getScalarType(), llvm::ConstantVector::getSplat(), llvm::Value::getType(), llvm::Type::getVectorNumElements(), llvm::SmallPtrSet< PtrType, SmallSize >::insert(), llvm::Type::isPointerTy(), and llvm::Type::isVectorTy().

Referenced by computePointerDifference(), and computePointerICmp().

static Value* ThreadBinOpOverPHI	(	unsigned	Opcode,
		Value *	LHS,
		Value *	RHS,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

ThreadBinOpOverPHI - 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 512 of file InstructionSimplify.cpp.

References Query::DT, llvm::PHINode::getIncomingValue(), llvm::PHINode::getNumIncomingValues(), llvm::SimplifyBinOp(), and ValueDominatesPHI().

Referenced by SimplifyAndInst(), SimplifyBinOp(), SimplifyDiv(), SimplifyMulInst(), SimplifyOrInst(), SimplifyRem(), and SimplifyShift().

static Value* ThreadBinOpOverSelect	(	unsigned	Opcode,
		Value *	LHS,
		Value *	RHS,
		const Query &	Q,
		unsigned	MaxRecurse
	)

static

ThreadBinOpOverSelect - 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 358 of file InstructionSimplify.cpp.

References llvm::dyn_cast(), llvm::SelectInst::getFalseValue(), llvm::Instruction::getOpcode(), llvm::User::getOperand(), llvm::SelectInst::getTrueValue(), llvm::Instruction::isCommutative(), and llvm::SimplifyBinOp().

Referenced by SimplifyAndInst(), SimplifyBinOp(), SimplifyDiv(), SimplifyMulInst(), SimplifyOrInst(), SimplifyRem(), and SimplifyShift().

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

static

ThreadCmpOverPHI - In the case of a comparison with a PHI instruction, try 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 555 of file InstructionSimplify.cpp.

References Query::DT, llvm::PHINode::getIncomingValue(), llvm::PHINode::getNumIncomingValues(), llvm::CmpInst::getSwappedPredicate(), llvm::SimplifyCmpInst(), std::swap(), and ValueDominatesPHI().

Referenced by SimplifyFCmpInst(), and SimplifyICmpInst().

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

static

ThreadCmpOverSelect - 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.

Definition at line 430 of file InstructionSimplify.cpp.

References llvm::Constant::getAllOnesValue(), llvm::SelectInst::getCondition(), getFalse(), llvm::SelectInst::getFalseValue(), llvm::CmpInst::getSwappedPredicate(), getTrue(), llvm::SelectInst::getTrueValue(), llvm::Value::getType(), isSameCompare(), llvm::Type::isVectorTy(), llvm::PatternMatch::m_One(), llvm::PatternMatch::m_Zero(), llvm::PatternMatch::match(), llvm::SimplifyAndInst(), llvm::SimplifyCmpInst(), llvm::SimplifyOrInst(), llvm::SimplifyXorInst(), and std::swap().

Referenced by SimplifyFCmpInst(), and SimplifyICmpInst().

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

static

ValueDominatesPHI - Does the given value dominate the specified phi node?

Definition at line 93 of file InstructionSimplify.cpp.

References llvm::DominatorTree::dominates(), llvm::dyn_cast(), llvm::Function::getEntryBlock(), llvm::Instruction::getParent(), llvm::BasicBlock::getParent(), I, and llvm::DominatorTree::isReachableFromEntry().

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

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