mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8077 91177308-0d34-0410-b5e6-96231b3b80d8
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
//===-- llvm/Support/ValueHolder.h - Wrapper for Value's --------*- C++ -*-===//
|
|
//
|
|
// This class defines a simple subclass of User, which keeps a pointer to a
|
|
// Value, which automatically updates when Value::replaceAllUsesWith is called.
|
|
// This is useful when you have pointers to Value's in your pass, but the
|
|
// pointers get invalidated when some other portion of the algorithm is
|
|
// replacing Values with other Values.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_VALUEHOLDER_H
|
|
#define LLVM_SUPPORT_VALUEHOLDER_H
|
|
|
|
#include "llvm/User.h"
|
|
|
|
struct ValueHolder : public User {
|
|
ValueHolder(Value *V = 0);
|
|
ValueHolder(const ValueHolder &VH) : User(VH.getType(), Value::TypeVal) {
|
|
Operands.push_back(Use(VH.get(), this));
|
|
}
|
|
|
|
// Getters...
|
|
Value *get() const { return (Value*)getOperand(0); }
|
|
operator Value*() const { return (Value*)getOperand(0); }
|
|
|
|
// Setters...
|
|
const ValueHolder &operator=(Value *V) {
|
|
setOperand(0, V);
|
|
return *this;
|
|
}
|
|
|
|
const ValueHolder &operator=(ValueHolder &VH) {
|
|
setOperand(0, VH);
|
|
return *this;
|
|
}
|
|
|
|
virtual void print(std::ostream& OS) const {
|
|
OS << "ValueHolder";
|
|
}
|
|
};
|
|
|
|
#endif
|