Value handle that is nullable, but tries to track the Value. More...

#include "llvm/IR/ValueHandle.h"

Inheritance diagram for llvm::WeakTrackingVH:

Public Member Functions
	WeakTrackingVH ()
	WeakTrackingVH (Value *P)
	WeakTrackingVH (const WeakTrackingVH &RHS)
WeakTrackingVH &	operator= (const WeakTrackingVH &RHS)=default
Value *	operator= (Value *RHS)
Value *	operator= (const ValueHandleBase &RHS)
	operator Value * () const
bool	pointsToAliveValue () const
Public Member Functions inherited from llvm::ValueHandleBase
	ValueHandleBase (HandleBaseKind Kind)
	ValueHandleBase (HandleBaseKind Kind, Value *V)
	~ValueHandleBase ()
Value *	operator= (Value *RHS)
Value *	operator= (const ValueHandleBase &RHS)
Value *	operator= (ValueHandleBase &&RHS)
Value *	operator-> () const
Value &	operator* () const

Additional Inherited Members
Static Public Member Functions inherited from llvm::ValueHandleBase
static LLVM_ABI void	ValueIsDeleted (Value *V)
static LLVM_ABI void	ValueIsRAUWd (Value Old, Value New)
Protected Types inherited from llvm::ValueHandleBase
enum	HandleBaseKind { Assert , Callback , Weak , WeakTracking }
	This indicates what sub class the handle actually is. More...
Protected Member Functions inherited from llvm::ValueHandleBase
	ValueHandleBase (const ValueHandleBase &RHS)
	ValueHandleBase (HandleBaseKind Kind, const ValueHandleBase &RHS)
	ValueHandleBase (HandleBaseKind Kind, ValueHandleBase &&RHS)
Value *	getValPtr () const
LLVM_ABI void	RemoveFromUseList ()
	Remove this ValueHandle from its current use list.
void	clearValPtr ()
	Clear the underlying pointer without clearing the use list.
Static Protected Member Functions inherited from llvm::ValueHandleBase
static bool	isValid (Value *V)

Detailed Description

Value handle that is nullable, but tries to track the Value.

This is a value handle that tries hard to point to a Value, even across RAUW operations, but will null itself out if the value is destroyed. this is useful for advisory sorts of information, but should not be used as the key of a map (since the map would have to rearrange itself when the pointer changes).

Definition at line 234 of file ValueHandle.h.