#include <Constants.h>

Inheritance diagram for llvm::UndefValue:

Collaboration diagram for llvm::UndefValue:

Public Member Functions
UndefValue *	getSequentialElement () const

UndefValue *	getStructElement (unsigned Elt) const

UndefValue *	getElementValue (Constant *C) const

UndefValue *	getElementValue (unsigned Idx) const

virtual void	destroyConstant ()

Public Member Functions inherited from llvm::Constant
bool	isNullValue () const

bool	isAllOnesValue () const

bool	isNegativeZeroValue () const

bool	isZeroValue () const
	Return true if the value is negative zero or null value. More...

bool	canTrap () const

bool	isThreadDependent () const
	isThreadDependent - Return true if the value can vary between threads. More...

bool	isConstantUsed () const

PossibleRelocationsTy	getRelocationInfo () const

Constant *	getAggregateElement (unsigned Elt) const

Constant *	getAggregateElement (Constant *Elt) const

Constant *	getSplatValue () const

const APInt &	getUniqueInteger () const

virtual void	replaceUsesOfWithOnConstant (Value , Value , Use *)

void	removeDeadConstantUsers () 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)

Static Public Member Functions
static UndefValue *	get (Type *T)

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::Constant
static bool	classof (const Value *V)

static Constant *	getNullValue (Type *Ty)

static Constant *	getAllOnesValue (Type *Ty)
	Get the all ones value. More...

static Constant *	getIntegerValue (Type *Ty, const APInt &V)

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

Protected Member Functions
	UndefValue (Type *T)

void *	operator new (size_t s)

Protected Member Functions inherited from llvm::Constant
	Constant (Type ty, ValueTy vty, Use Ops, unsigned NumOps)

void	destroyConstantImpl ()

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)

Additional Inherited Members
Public Types inherited from llvm::Constant
enum	PossibleRelocationsTy { NoRelocation = 0, LocalRelocation = 1, GlobalRelocations = 2 }

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

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

UndefValue - 'undef' values are things that do not have specified contents. These are used for a variety of purposes, including global variable initializers and operands to instructions. 'undef' values can occur with any first-class type.

Undef values aren't exactly constants; if they have multiple uses, they can appear to have different bit patterns at each use. See LangRef.html::undefvalues for details.

Definition at line 1121 of file Constants.h.

Constructor & Destructor Documentation

llvm::UndefValue::UndefValue ( Type * T )

inlineexplicitprotected

Definition at line 1125 of file Constants.h.

Member Function Documentation

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

inlinestatic

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

Definition at line 1156 of file Constants.h.

References llvm::Value::getValueID().

void UndefValue::destroyConstant ( )

virtual

destroyConstant - Called if some element of this constant is no longer valid. At this point only other constants may be on the use_list for this constant. Any constants on our Use list must also be destroy'd. The implementation must be sure to remove the constant from the list of available cached constants. Implementations should call destroyConstantImpl as the last thing they do, to destroy all users and delete this.

Reimplemented from llvm::Constant.

Definition at line 1344 of file Constants.cpp.

References llvm::Constant::destroyConstantImpl(), llvm::Value::getContext(), llvm::Value::getType(), llvm::LLVMContext::pImpl, and llvm::LLVMContextImpl::UVConstants.

UndefValue * UndefValue::get ( Type * T )

static

get() - Static factory methods - Return an 'undef' object of the specified type.

Definition at line 1334 of file Constants.cpp.

References llvm::Type::getContext(), llvm::LLVMContext::pImpl, and llvm::LLVMContextImpl::UVConstants.

UndefValue * UndefValue::getElementValue ( Constant * C ) const

getElementValue - Return an undef of the right value for the specified GEP index.

getElementValue - Return an undef of the right value for the specified GEP index if we can, otherwise return null (e.g. if C is a ConstantExpr).

Definition at line 705 of file Constants.cpp.

References getSequentialElement(), getStructElement(), and llvm::Value::getType().

UndefValue * UndefValue::getElementValue ( unsigned Idx ) const

getElementValue - Return an undef of the right value for the specified GEP index.

Definition at line 713 of file Constants.cpp.

References getSequentialElement(), getStructElement(), and llvm::Value::getType().

UndefValue * UndefValue::getSequentialElement ( ) const

getSequentialElement - If this Undef has array or vector type, return a undef with the right element type.

getSequentialElement - If this undef has array or vector type, return an undef with the right element type.

Definition at line 693 of file Constants.cpp.

References get(), and llvm::Value::getType().

Referenced by getElementValue().

UndefValue * UndefValue::getStructElement ( unsigned Elt ) const

getStructElement - If this undef has struct type, return a undef with the right element type for the specified element.

getStructElement - If this undef has struct type, return a zero with the right element type for the specified element.

Definition at line 699 of file Constants.cpp.

References get(), and llvm::Value::getType().

Referenced by getElementValue().

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

inlineprotected

Definition at line 1128 of file Constants.h.

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

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation