Abstract base class of comparison instructions. More...

#include <InstrTypes.h>

Inheritance diagram for llvm::CmpInst:

Collaboration diagram for llvm::CmpInst:

Public Types
enum	Predicate { FCMP_FALSE = 0, FCMP_OEQ = 1, FCMP_OGT = 2, FCMP_OGE = 3, FCMP_OLT = 4, FCMP_OLE = 5, FCMP_ONE = 6, FCMP_ORD = 7, FCMP_UNO = 8, FCMP_UEQ = 9, FCMP_UGT = 10, FCMP_UGE = 11, FCMP_ULT = 12, FCMP_ULE = 13, FCMP_UNE = 14, FCMP_TRUE = 15, FIRST_FCMP_PREDICATE = FCMP_FALSE, LAST_FCMP_PREDICATE = FCMP_TRUE, BAD_FCMP_PREDICATE = FCMP_TRUE + 1, ICMP_EQ = 32, ICMP_NE = 33, ICMP_UGT = 34, ICMP_UGE = 35, ICMP_ULT = 36, ICMP_ULE = 37, ICMP_SGT = 38, ICMP_SGE = 39, ICMP_SLT = 40, ICMP_SLE = 41, FIRST_ICMP_PREDICATE = ICMP_EQ, LAST_ICMP_PREDICATE = ICMP_SLE, BAD_ICMP_PREDICATE = ICMP_SLE + 1 }

Public Types inherited from llvm::Instruction
enum	OperationEquivalenceFlags { CompareIgnoringAlignment = 1<<0, CompareUsingScalarTypes = 1<<1 }

enum	TermOps

enum	BinaryOps

enum	MemoryOps

enum	CastOps

enum	OtherOps

Public Types inherited from llvm::User
typedef Use *	op_iterator

typedef const Use *	const_op_iterator

Public Types inherited from llvm::Value
enum	ValueTy { ArgumentVal, BasicBlockVal, FunctionVal, GlobalAliasVal, GlobalVariableVal, UndefValueVal, BlockAddressVal, ConstantExprVal, ConstantAggregateZeroVal, ConstantDataArrayVal, ConstantDataVectorVal, ConstantIntVal, ConstantFPVal, ConstantArrayVal, ConstantStructVal, ConstantVectorVal, ConstantPointerNullVal, MDNodeVal, MDStringVal, InlineAsmVal, PseudoSourceValueVal, FixedStackPseudoSourceValueVal, InstructionVal, ConstantFirstVal = FunctionVal, ConstantLastVal = ConstantPointerNullVal }

typedef value_use_iterator< User >	use_iterator

typedef value_use_iterator < const User >	const_use_iterator

Public Member Functions
void *	operator new (size_t s)

OtherOps	getOpcode () const
	Get the opcode casted to the right type. More...

Predicate	getPredicate () const
	Return the predicate for this instruction. More...

void	setPredicate (Predicate P)
	Set the predicate for this instruction to the specified value. More...

bool	isFPPredicate () const

bool	isIntPredicate () const

Predicate	getInversePredicate () const
	Return the inverse of the instruction's predicate. More...

Predicate	getSwappedPredicate () const
	Return the predicate as if the operands were swapped. More...

	DECLARE_TRANSPARENT_OPERAND_ACCESSORS (Value)
	Provide more efficient getOperand methods. More...

void	swapOperands ()
	Swap the operands and adjust predicate accordingly to retain the same comparison. More...

bool	isCommutative () const
	Determine if this CmpInst is commutative. More...

bool	isEquality () const
	Determine if this is an equals/not equals predicate. More...

bool	isSigned () const
	Determine if this instruction is using a signed comparison. More...

bool	isUnsigned () const
	Determine if this instruction is using an unsigned comparison. More...

bool	isTrueWhenEqual () const
	Determine if this is true when both operands are the same. More...

bool	isFalseWhenEqual () const
	Determine if this is false when both operands are the same. More...

Public Member Functions inherited from llvm::Instruction
	~Instruction ()

Instruction *	use_back ()

const Instruction *	use_back () const

const BasicBlock *	getParent () const

BasicBlock *	getParent ()

void	removeFromParent ()

void	eraseFromParent ()

void	insertBefore (Instruction *InsertPos)

void	insertAfter (Instruction *InsertPos)

void	moveBefore (Instruction *MovePos)

unsigned	getOpcode () const
	getOpcode() returns a member of one of the enums like Instruction::Add. More...

const char *	getOpcodeName () const

bool	isTerminator () const

bool	isBinaryOp () const

bool	isShift ()

bool	isCast () const

bool	isLogicalShift () const

bool	isArithmeticShift () const
	isArithmeticShift - Return true if this is an arithmetic shift right. More...

bool	hasMetadata () const

bool	hasMetadataOtherThanDebugLoc () const

MDNode *	getMetadata (unsigned KindID) const

MDNode *	getMetadata (StringRef Kind) const

void	getAllMetadata (SmallVectorImpl< std::pair< unsigned, MDNode * > > &MDs) const

void	getAllMetadataOtherThanDebugLoc (SmallVectorImpl< std::pair< unsigned, MDNode * > > &MDs) const

void	setMetadata (unsigned KindID, MDNode *Node)

void	setMetadata (StringRef Kind, MDNode *Node)

void	setDebugLoc (const DebugLoc &Loc)
	setDebugLoc - Set the debug location information for this instruction. More...

const DebugLoc &	getDebugLoc () const
	getDebugLoc - Return the debug location for this node as a DebugLoc. More...

void	setHasUnsafeAlgebra (bool B)

void	setHasNoNaNs (bool B)

void	setHasNoInfs (bool B)

void	setHasNoSignedZeros (bool B)

void	setHasAllowReciprocal (bool B)

void	setFastMathFlags (FastMathFlags FMF)

bool	hasUnsafeAlgebra () const
	Determine whether the unsafe-algebra flag is set. More...

bool	hasNoNaNs () const
	Determine whether the no-NaNs flag is set. More...

bool	hasNoInfs () const
	Determine whether the no-infs flag is set. More...

bool	hasNoSignedZeros () const
	Determine whether the no-signed-zeros flag is set. More...

bool	hasAllowReciprocal () const
	Determine whether the allow-reciprocal flag is set. More...

FastMathFlags	getFastMathFlags () const

void	copyFastMathFlags (const Instruction *I)
	Copy I's fast-math flags. More...

bool	isAssociative () const

bool	isCommutative () const

bool	isIdempotent () const

bool	isNilpotent () const

bool	mayWriteToMemory () const

bool	mayReadFromMemory () const

bool	mayReadOrWriteMemory () const

bool	mayThrow () const

bool	mayReturn () const

bool	mayHaveSideEffects () const

Instruction *	clone () const

bool	isIdenticalTo (const Instruction *I) const

bool	isIdenticalToWhenDefined (const Instruction *I) const

bool	isSameOperationAs (const Instruction *I, unsigned flags=0) const
	Determine if one instruction is the same operation as another. More...

bool	isUsedOutsideOfBlock (const BasicBlock *BB) const

Public Member Functions inherited from llvm::User
	~User ()

void	operator delete (void *Usr)
	operator delete - free memory allocated for User and Use objects More...

void	operator delete (void *, unsigned)
	placement delete - required by std, but never called. More...

void	operator delete (void *, unsigned, bool)
	placement delete - required by std, but never called. More...

Value *	getOperand (unsigned i) const

void	setOperand (unsigned i, Value *Val)

const Use &	getOperandUse (unsigned i) const

Use &	getOperandUse (unsigned i)

unsigned	getNumOperands () const

op_iterator	op_begin ()

const_op_iterator	op_begin () const

op_iterator	op_end ()

const_op_iterator	op_end () const

value_op_iterator	value_op_begin ()

value_op_iterator	value_op_end ()

void	dropAllReferences ()

void	replaceUsesOfWith (Value From, Value To)

Public Member Functions inherited from llvm::Value
virtual	~Value ()

void	dump () const
	dump - Support for debugging, callable in GDB: V->dump() More...

void	print (raw_ostream &O, AssemblyAnnotationWriter *AAW=0) const

Type *	getType () const

LLVMContext &	getContext () const
	All values hold a context through their type. More...

bool	hasName () const

ValueName *	getValueName () const

void	setValueName (ValueName *VN)

StringRef	getName () const

void	setName (const Twine &Name)

void	takeName (Value *V)

void	replaceAllUsesWith (Value *V)

bool	use_empty () const

use_iterator	use_begin ()

const_use_iterator	use_begin () const

use_iterator	use_end ()

const_use_iterator	use_end () const

User *	use_back ()

const User *	use_back () const

bool	hasOneUse () const

bool	hasNUses (unsigned N) const

bool	hasNUsesOrMore (unsigned N) const

bool	isUsedInBasicBlock (const BasicBlock *BB) const

unsigned	getNumUses () const

void	addUse (Use &U)

unsigned	getValueID () const

unsigned	getRawSubclassOptionalData () const

void	clearSubclassOptionalData ()

bool	hasSameSubclassOptionalData (const Value *V) const

void	intersectOptionalDataWith (const Value *V)

bool	hasValueHandle () const

Value *	stripPointerCasts ()
	Strips off any unneeded pointer casts, all-zero GEPs and aliases from the specified value, returning the original uncasted value. More...

const Value *	stripPointerCasts () const

Value *	stripPointerCastsNoFollowAliases ()
	Strips off any unneeded pointer casts and all-zero GEPs from the specified value, returning the original uncasted value. More...

const Value *	stripPointerCastsNoFollowAliases () const

Value *	stripInBoundsConstantOffsets ()
	Strips off unneeded pointer casts and all-constant GEPs from the specified value, returning the original pointer value. More...

const Value *	stripInBoundsConstantOffsets () const

Value *	stripAndAccumulateInBoundsConstantOffsets (const DataLayout &DL, APInt &Offset)
	Strips like `stripInBoundsConstantOffsets` but also accumulates the constant offset stripped. More...

const Value *	stripAndAccumulateInBoundsConstantOffsets (const DataLayout &DL, APInt &Offset) const

Value *	stripInBoundsOffsets ()
	Strips off unneeded pointer casts and any in-bounds offsets from the specified value, returning the original pointer value. More...

const Value *	stripInBoundsOffsets () const

bool	isDereferenceablePointer () const

Value *	DoPHITranslation (const BasicBlock CurBB, const BasicBlock PredBB)

const Value *	DoPHITranslation (const BasicBlock CurBB, const BasicBlock PredBB) const

void	mutateType (Type *Ty)

Public Member Functions inherited from llvm::ilist_node< Instruction >
Instruction *	getPrevNode ()
	Get the previous node, or 0 for the list head. More...

const Instruction *	getPrevNode () const
	Get the previous node, or 0 for the list head. More...

Instruction *	getNextNode ()
	Get the next node, or 0 for the list tail. More...

const Instruction *	getNextNode () const
	Get the next node, or 0 for the list tail. More...

Static Public Member Functions
static CmpInst *	Create (OtherOps Op, unsigned short predicate, Value S1, Value S2, const Twine &Name="", Instruction *InsertBefore=0)
	Create a CmpInst. More...

static CmpInst *	Create (OtherOps Op, unsigned short predicate, Value S1, Value S2, const Twine &Name, BasicBlock *InsertAtEnd)
	Create a CmpInst. More...

static bool	isFPPredicate (Predicate P)

static bool	isIntPredicate (Predicate P)

static Predicate	getInversePredicate (Predicate pred)
	Return the inverse of a given predicate. More...

static Predicate	getSwappedPredicate (Predicate pred)
	Return the predicate as if the operands were swapped. More...

static bool	isUnsigned (unsigned short predicate)
	Determine if the predicate is an unsigned operation. More...

static bool	isSigned (unsigned short predicate)
	Determine if the predicate is an signed operation. More...

static bool	isOrdered (unsigned short predicate)
	Determine if the predicate is an ordered operation. More...

static bool	isUnordered (unsigned short predicate)
	Determine if the predicate is an unordered operation. More...

static bool	isTrueWhenEqual (unsigned short predicate)
	Determine if the predicate is true when comparing a value with itself. More...

static bool	isFalseWhenEqual (unsigned short predicate)
	Determine if the predicate is false when comparing a value with itself. More...

static bool	classof (const Instruction *I)
	Methods for support type inquiry through isa, cast, and dyn_cast: More...

static bool	classof (const Value *V)

static Type *	makeCmpResultType (Type *opnd_type)
	Create a result type for fcmp/icmp. More...

Static Public Member Functions inherited from llvm::Instruction
static const char *	getOpcodeName (unsigned OpCode)

static bool	isTerminator (unsigned OpCode)

static bool	isBinaryOp (unsigned Opcode)

static bool	isShift (unsigned Opcode)
	Determine if the Opcode is one of the shift instructions. More...

static bool	isCast (unsigned OpCode)
	Determine if the OpCode is one of the CastInst instructions. More...

static bool	isAssociative (unsigned op)

static bool	isCommutative (unsigned op)

static bool	isIdempotent (unsigned op)

static bool	isNilpotent (unsigned op)

static bool	classof (const Value *V)
	Methods for support type inquiry through isa, cast, and dyn_cast: More...

Static Public Member Functions inherited from llvm::User
static bool	classof (const Value *V)

Protected Member Functions
	CmpInst (Type ty, Instruction::OtherOps op, unsigned short pred, Value LHS, Value RHS, const Twine &Name="", Instruction InsertBefore=0)

	CmpInst (Type ty, Instruction::OtherOps op, unsigned short pred, Value LHS, Value RHS, const Twine &Name, BasicBlock InsertAtEnd)

virtual void	anchor () LLVM_OVERRIDE

Protected Member Functions inherited from llvm::Instruction
void	setInstructionSubclassData (unsigned short D)

unsigned	getSubclassDataFromInstruction () const

	Instruction (Type Ty, unsigned iType, Use Ops, unsigned NumOps, Instruction *InsertBefore=0)

	Instruction (Type Ty, unsigned iType, Use Ops, unsigned NumOps, BasicBlock *InsertAtEnd)

virtual Instruction *	clone_impl () const =0

Protected Member Functions inherited from llvm::User
void *	operator new (size_t s, unsigned Us)

	User (Type ty, unsigned vty, Use OpList, unsigned NumOps)

Use *	allocHungoffUses (unsigned) const

void	dropHungoffUses ()

template<int Idx>
Use &	Op ()

template<int Idx>
const Use &	Op () const

Protected Member Functions inherited from llvm::Value
virtual void	printCustom (raw_ostream &O) const

	Value (Type *Ty, unsigned scid)

unsigned short	getSubclassDataFromValue () const

void	setValueSubclassData (unsigned short D)

Protected Member Functions inherited from llvm::ilist_node< Instruction >
	ilist_node ()

Additional Inherited Members
Static Public Attributes inherited from llvm::Value
static const unsigned	MaximumAlignment = 1u << 29

Static Protected Member Functions inherited from llvm::User
template<int Idx, typename U >
static Use &	OpFrom (const U *that)

Protected Attributes inherited from llvm::User
Use *	OperandList

unsigned	NumOperands

Protected Attributes inherited from llvm::Value
unsigned char	SubclassOptionalData: 7

Detailed Description

Abstract base class of comparison instructions.

This class is the base class for the comparison instructions.

Definition at line 633 of file InstrTypes.h.

Member Enumeration Documentation

enum llvm::CmpInst::Predicate

This enumeration lists the possible predicates for CmpInst subclasses. Values in the range 0-31 are reserved for FCmpInst, while values in the range 32-64 are reserved for ICmpInst. This is necessary to ensure the predicate values are not overlapping between the classes.

Enumerator
FCMP_FALSE	0 0 0 0 Always false (always folded)
FCMP_OEQ	0 0 0 1 True if ordered and equal
FCMP_OGT	0 0 1 0 True if ordered and greater than
FCMP_OGE	0 0 1 1 True if ordered and greater than or equal
FCMP_OLT	0 1 0 0 True if ordered and less than
FCMP_OLE	0 1 0 1 True if ordered and less than or equal
FCMP_ONE	0 1 1 0 True if ordered and operands are unequal
FCMP_ORD	0 1 1 1 True if ordered (no nans)
FCMP_UNO	1 0 0 0 True if unordered: isnan(X) \| isnan(Y)
FCMP_UEQ	1 0 0 1 True if unordered or equal
FCMP_UGT	1 0 1 0 True if unordered or greater than
FCMP_UGE	1 0 1 1 True if unordered, greater than, or equal
FCMP_ULT	1 1 0 0 True if unordered or less than
FCMP_ULE	1 1 0 1 True if unordered, less than, or equal
FCMP_UNE	1 1 1 0 True if unordered or not equal
FCMP_TRUE	1 1 1 1 Always true (always folded)
FIRST_FCMP_PREDICATE
LAST_FCMP_PREDICATE
BAD_FCMP_PREDICATE
ICMP_EQ	equal
ICMP_NE	not equal
ICMP_UGT	unsigned greater than
ICMP_UGE	unsigned greater or equal
ICMP_ULT	unsigned less than
ICMP_ULE	unsigned less or equal
ICMP_SGT	signed greater than
ICMP_SGE	signed greater or equal
ICMP_SLT	signed less than
ICMP_SLE	signed less or equal
FIRST_ICMP_PREDICATE
LAST_ICMP_PREDICATE
BAD_ICMP_PREDICATE

Definition at line 651 of file InstrTypes.h.

Constructor & Destructor Documentation

CmpInst::CmpInst	(	Type *	ty,
		Instruction::OtherOps	op,
		unsigned short	pred,
		Value *	LHS,
		Value *	RHS,
		const Twine &	Name = `""`,
		Instruction *	InsertBefore = `0`
	)

protected

Definition at line 3008 of file Instructions.cpp.

References llvm::Value::setName(), and setPredicate().

CmpInst::CmpInst	(	Type *	ty,
		Instruction::OtherOps	op,
		unsigned short	pred,
		Value *	LHS,
		Value *	RHS,
		const Twine &	Name,
		BasicBlock *	InsertAtEnd
	)

protected

Definition at line 3021 of file Instructions.cpp.

References llvm::Value::setName(), and setPredicate().

Member Function Documentation

void CmpInst::anchor ( )

protectedvirtual

Reimplemented from llvm::User.

Definition at line 3006 of file Instructions.cpp.

static bool llvm::CmpInst::classof ( const Instruction * I )

inlinestatic

Methods for support type inquiry through isa, cast, and dyn_cast:

Definition at line 823 of file InstrTypes.h.

References llvm::Instruction::getOpcode().

Referenced by classof().

static bool llvm::CmpInst::classof ( const Value * V )

inlinestatic

Definition at line 827 of file InstrTypes.h.

References classof().

CmpInst * CmpInst::Create	(	OtherOps	Op,
		unsigned short	predicate,
		Value *	S1,
		Value *	S2,
		const Twine &	Name = `""`,
		Instruction *	InsertBefore = `0`
	)

static

Create a CmpInst.

Construct a compare instruction, given the opcode, the predicate and the two operands. Optionally (if InstBefore is specified) insert the instruction into a BasicBlock right before the specified instruction. The specified Instruction is allowed to be a dereferenced end iterator.

Definition at line 3035 of file Instructions.cpp.

Referenced by llvm::ConstantExpr::getAsInstruction(), OptimizeCmpExpression(), llvm::InstCombiner::visitICmpInst(), and llvm::InstCombiner::visitXor().

CmpInst * CmpInst::Create	(	OtherOps	Op,
		unsigned short	predicate,
		Value *	S1,
		Value *	S2,
		const Twine &	Name,
		BasicBlock *	InsertAtEnd
	)

static

Create a CmpInst.

Construct a compare instruction, given the opcode, the predicate and the two operands. Also automatically insert this instruction to the end of the BasicBlock specified.

Definition at line 3056 of file Instructions.cpp.

llvm::CmpInst::DECLARE_TRANSPARENT_OPERAND_ACCESSORS ( Value )

Provide more efficient getOperand methods.

Predicate llvm::CmpInst::getInversePredicate ( ) const

inline

Return the inverse of the instruction's predicate.

For example, EQ -> NE, UGT -> ULE, SLT -> SGE, OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.

Returns: the inverse predicate for the instruction's current predicate.

Definition at line 737 of file InstrTypes.h.

References getPredicate().

Referenced by llvm::ConstantFoldBinaryInstruction(), llvm::FoldBranchToCommonDest(), llvm::getICmpCode(), SimplifyICmpInst(), llvm::InstCombiner::visitBranchInst(), and llvm::InstCombiner::visitICmpInst().

CmpInst::Predicate CmpInst::getInversePredicate ( Predicate pred )

static

Return the inverse of a given predicate.

For example, EQ -> NE, UGT -> ULE, SLT -> SGE, OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.

Returns: the inverse predicate for predicate provided in pred.

Definition at line 3086 of file Instructions.cpp.

References FCMP_FALSE, FCMP_OEQ, FCMP_OGE, FCMP_OGT, FCMP_OLE, FCMP_OLT, FCMP_ONE, FCMP_ORD, FCMP_TRUE, FCMP_UEQ, FCMP_UGE, FCMP_UGT, FCMP_ULE, FCMP_ULT, FCMP_UNE, FCMP_UNO, ICMP_EQ, ICMP_NE, ICMP_SGE, ICMP_SGT, ICMP_SLE, ICMP_SLT, ICMP_UGE, ICMP_UGT, ICMP_ULE, ICMP_ULT, and llvm_unreachable.

OtherOps llvm::CmpInst::getOpcode ( ) const

inline

Get the opcode casted to the right type.

Definition at line 709 of file InstrTypes.h.

References llvm::Instruction::getOpcode().

Referenced by OptimizeCmpExpression(), and llvm::InstCombiner::visitXor().

Predicate llvm::CmpInst::getPredicate ( ) const

inline

Return the predicate for this instruction.

Definition at line 714 of file InstrTypes.h.

References llvm::Instruction::getSubclassDataFromInstruction().

Predicate llvm::CmpInst::getSwappedPredicate ( ) const

inline

Return the predicate as if the operands were swapped.

For example, EQ->EQ, SLE->SGE, ULT->UGT, OEQ->OEQ, ULE->UGE, OLT->OGT, etc.

Returns: the predicate that would be the result of exchanging the two operands of the CmpInst instruction without changing the result produced.

Definition at line 753 of file InstrTypes.h.

References getPredicate().

CmpInst::Predicate CmpInst::getSwappedPredicate ( Predicate pred )

static

Return the predicate as if the operands were swapped.

This is a static version that you can use without an instruction available.

Definition at line 3208 of file Instructions.cpp.

References FCMP_FALSE, FCMP_OEQ, FCMP_OGE, FCMP_OGT, FCMP_OLE, FCMP_OLT, FCMP_ONE, FCMP_ORD, FCMP_TRUE, FCMP_UEQ, FCMP_UGE, FCMP_UGT, FCMP_ULE, FCMP_ULT, FCMP_UNE, FCMP_UNO, ICMP_EQ, ICMP_NE, ICMP_SGE, ICMP_SGT, ICMP_SLE, ICMP_SLT, ICMP_UGE, ICMP_UGT, ICMP_ULE, ICMP_ULT, and llvm_unreachable.

bool CmpInst::isCommutative ( ) const

Determine if this CmpInst is commutative.

This is just a convenience that dispatches to the subclasses.

Definition at line 3073 of file Instructions.cpp.

bool CmpInst::isEquality ( ) const

Determine if this is an equals/not equals predicate.

This is just a convenience that dispatches to the subclasses.

Definition at line 3079 of file Instructions.cpp.

bool llvm::CmpInst::isFalseWhenEqual ( ) const

inline

Determine if this is false when both operands are the same.

This is just a convenience.

Definition at line 798 of file InstrTypes.h.

References getPredicate().

Referenced by SimplifyFCmpInst(), and llvm::ScalarEvolution::SimplifyICmpOperands().

bool CmpInst::isFalseWhenEqual ( unsigned short predicate )

static

Determine if the predicate is false when comparing a value with itself.

Definition at line 3280 of file Instructions.cpp.

References FCMP_FALSE, FCMP_OGT, FCMP_OLT, FCMP_ONE, ICMP_NE, ICMP_SGT, ICMP_SLT, ICMP_UGT, and ICMP_ULT.

static bool llvm::CmpInst::isFPPredicate ( Predicate P )

inlinestatic

Definition at line 721 of file InstrTypes.h.

References FIRST_FCMP_PREDICATE, and LAST_FCMP_PREDICATE.

bool llvm::CmpInst::isFPPredicate ( ) const

inline

Definition at line 729 of file InstrTypes.h.

References getPredicate(), and isFPPredicate().

Referenced by isFPPredicate(), and SimplifyFCmpInst().

static bool llvm::CmpInst::isIntPredicate ( Predicate P )

inlinestatic

Definition at line 725 of file InstrTypes.h.

References FIRST_ICMP_PREDICATE, and LAST_ICMP_PREDICATE.

bool llvm::CmpInst::isIntPredicate ( ) const

inline

Definition at line 730 of file InstrTypes.h.

References getPredicate(), and isIntPredicate().

Referenced by isIntPredicate(), SimplifyCmpInst(), and SimplifyICmpInst().

bool CmpInst::isOrdered ( unsigned short predicate )

static

Determine if the predicate is an ordered operation.

Definition at line 3254 of file Instructions.cpp.

References FCMP_OEQ, FCMP_OGE, FCMP_OGT, FCMP_OLE, FCMP_OLT, FCMP_ONE, and FCMP_ORD.

Referenced by SimplifyFCmpInst().

bool llvm::CmpInst::isSigned ( ) const

inline

Determine if this instruction is using a signed comparison.

Returns: true if the comparison is signed, false otherwise.

Definition at line 780 of file InstrTypes.h.

References getPredicate().

Referenced by llvm::ConstantFoldCompareInstruction(), llvm::InstCombiner::FoldAndOfICmps(), llvm::InstCombiner::FoldGEPICmp(), llvm::InstCombiner::FoldICmpDivCst(), llvm::InstCombiner::FoldICmpShrCst(), llvm::InstCombiner::FoldOrOfICmps(), isSignTest(), llvm::PredicatesFoldable(), SimplifyICmpInst(), llvm::InstCombiner::visitICmpInst(), llvm::InstCombiner::visitICmpInstWithCastAndCast(), and llvm::InstCombiner::visitICmpInstWithInstAndIntCst().

bool CmpInst::isSigned ( unsigned short predicate )

static

Determine if the predicate is an signed operation.

Returns: true if the predicate is signed, false otherwise.

Definition at line 3246 of file Instructions.cpp.

References ICMP_SGE, ICMP_SGT, ICMP_SLE, and ICMP_SLT.

bool llvm::CmpInst::isTrueWhenEqual ( ) const

inline

Determine if this is true when both operands are the same.

This is just a convenience.

Definition at line 792 of file InstrTypes.h.

References getPredicate().

Referenced by computePointerICmp(), llvm::ConstantFoldCompareInstruction(), llvm::InstCombiner::FoldGEPICmp(), llvm::InstCombiner::FoldICmpAddOpCst(), SimplifyFCmpInst(), SimplifyICmpInst(), and llvm::ScalarEvolution::SimplifyICmpOperands().

bool CmpInst::isTrueWhenEqual ( unsigned short predicate )

static

Determine if the predicate is true when comparing a value with itself.

Definition at line 3272 of file Instructions.cpp.

References FCMP_TRUE, FCMP_UEQ, FCMP_UGE, FCMP_ULE, ICMP_EQ, ICMP_SGE, ICMP_SLE, ICMP_UGE, and ICMP_ULE.

bool CmpInst::isUnordered ( unsigned short predicate )

static

Determine if the predicate is an unordered operation.

Definition at line 3263 of file Instructions.cpp.

References FCMP_UEQ, FCMP_UGE, FCMP_UGT, FCMP_ULE, FCMP_ULT, FCMP_UNE, and FCMP_UNO.

Referenced by SimplifyFCmpInst().

bool llvm::CmpInst::isUnsigned ( ) const

inline

Determine if this instruction is using an unsigned comparison.

Returns: true if the comparison is unsigned, false otherwise.

Definition at line 786 of file InstrTypes.h.

References getPredicate().

Referenced by SimplifyICmpInst(), llvm::InstCombiner::visitICmpInst(), llvm::InstCombiner::visitICmpInstWithInstAndIntCst(), and llvm::InstCombiner::visitSelectInstWithICmp().

bool CmpInst::isUnsigned ( unsigned short predicate )

static

Determine if the predicate is an unsigned operation.

Returns: true if the predicate is unsigned, false otherwise.

Definition at line 3238 of file Instructions.cpp.

References ICMP_UGE, ICMP_UGT, ICMP_ULE, and ICMP_ULT.

static Type* llvm::CmpInst::makeCmpResultType ( Type * opnd_type )

inlinestatic

Create a result type for fcmp/icmp.

Definition at line 832 of file InstrTypes.h.

References llvm::VectorType::get(), llvm::Type::getContext(), and llvm::Type::getInt1Ty().

Referenced by llvm::InstCombiner::FoldAndOfFCmps(), llvm::InstCombiner::FoldAndOfICmps(), llvm::InstCombiner::FoldOrOfFCmps(), GetCompareTy(), and llvm::getICmpValue().

void* llvm::CmpInst::operator new ( size_t s )

inline

Definition at line 688 of file InstrTypes.h.

void llvm::CmpInst::setPredicate ( Predicate P )

inline

Set the predicate for this instruction to the specified value.

Definition at line 719 of file InstrTypes.h.

References llvm::Instruction::setInstructionSubclassData().

Referenced by CmpInst(), llvm::FoldBranchToCommonDest(), llvm::FCmpInst::swapOperands(), llvm::InstCombiner::visitBranchInst(), llvm::InstCombiner::visitFCmpInst(), and llvm::InstCombiner::visitSelectInstWithICmp().

void CmpInst::swapOperands ( )

Swap the operands and adjust predicate accordingly to retain the same comparison.

This is just a convenience that dispatches to the subclasses.

Definition at line 3066 of file Instructions.cpp.

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

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation