1//===- llvm/IR/UseListOrder.h - LLVM Use List Order -------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file has structures and command-line options for preserving use-list
11// order.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_IR_USELISTORDER_H
16#define LLVM_IR_USELISTORDER_H
17
18#include "llvm/ADT/ArrayRef.h"
19#include "llvm/ADT/SmallVector.h"
20#include <vector>
21
22namespace llvm {
23
24class Module;
25class Function;
26class Value;
27
28/// \brief Structure to hold a use-list order.
29struct UseListOrder {
30  const Value *V;
31  const Function *F;
32  std::vector<unsigned> Shuffle;
33
34  UseListOrder(const Value *V, const Function *F, size_t ShuffleSize)
35      : V(V), F(F), Shuffle(ShuffleSize) {}
36
37  UseListOrder() : V(0), F(0) {}
38  UseListOrder(UseListOrder &&X)
39      : V(X.V), F(X.F), Shuffle(std::move(X.Shuffle)) {}
40  UseListOrder &operator=(UseListOrder &&X) {
41    V = X.V;
42    F = X.F;
43    Shuffle = std::move(X.Shuffle);
44    return *this;
45  }
46
47private:
48  UseListOrder(const UseListOrder &X) = delete;
49  UseListOrder &operator=(const UseListOrder &X) = delete;
50};
51
52typedef std::vector<UseListOrder> UseListOrderStack;
53
54} // end namespace llvm
55
56#endif
57