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 <cstddef>
19#include <vector>
20
21namespace llvm {
22
23class Module;
24class Function;
25class Value;
26
27/// \brief Structure to hold a use-list order.
28struct UseListOrder {
29  const Value *V;
30  const Function *F;
31  std::vector<unsigned> Shuffle;
32
33  UseListOrder(const Value *V, const Function *F, size_t ShuffleSize)
34      : V(V), F(F), Shuffle(ShuffleSize) {}
35
36  UseListOrder() : V(nullptr), F(nullptr) {}
37  UseListOrder(UseListOrder &&X)
38      : V(X.V), F(X.F), Shuffle(std::move(X.Shuffle)) {}
39  UseListOrder &operator=(UseListOrder &&X) {
40    V = X.V;
41    F = X.F;
42    Shuffle = std::move(X.Shuffle);
43    return *this;
44  }
45
46private:
47  UseListOrder(const UseListOrder &X) = delete;
48  UseListOrder &operator=(const UseListOrder &X) = delete;
49};
50
51typedef std::vector<UseListOrder> UseListOrderStack;
52
53} // end namespace llvm
54
55#endif // LLVM_IR_USELISTORDER_H
56