class PhiValues::PhiValuesCallbackVH

Declaration

class PhiValues::PhiValuesCallbackVH : public CallbackVH { /* full declaration omitted */ };

Description

A CallbackVH to notify PhiValues when a value is deleted or replaced, so that the cached information for that value can be cleared to avoid dangling pointers to invalid values.

Declared at: llvm/include/llvm/Analysis/PhiValues.h:90

Inherits from: CallbackVH

Member Variables

private llvm::PhiValues* PV

Method Overview

Inherited from CallbackVH:

Inherited from ValueHandleBase:

Methods

PhiValuesCallbackVH(llvm::Value* V,
                    llvm::PhiValues* PV = nullptr)

Declared at: llvm/include/llvm/Analysis/PhiValues.h:96

Parameters

llvm::Value* V
llvm::PhiValues* PV = nullptr

void allUsesReplacedWith(llvm::Value* New)

Description

Callback for Value RAUW. Called when this->getValPtr()->replaceAllUsesWith(new_value) is called, _before_ any of the uses have actually been replaced. If WeakTrackingVH were implemented as a CallbackVH, it would use this method to call setValPtr(new_value). AssertingVH would do nothing in this method.

Declared at: llvm/include/llvm/Analysis/PhiValues.h:93

Parameters

llvm::Value* New

void deleted()

Description

Callback for Value destruction. Called when this->getValPtr() is destroyed, inside ~Value(), so you may call any non-virtual Value method on getValPtr(), but no subclass methods. If WeakTrackingVH were implemented as a CallbackVH, it would use this method to call setValPtr(NULL). AssertingVH would use this method to cause an assertion failure. All implementations must remove the reference from this object to the Value that's being destroyed.

Declared at: llvm/include/llvm/Analysis/PhiValues.h:92