include/llvm/IR/UseListOrder.h

   1 //===- llvm/IR/UseListOrder.h - LLVM Use List Order -------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file has structures and command-line options for preserving use-list
  10 // order.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_IR_USELISTORDER_H
  15 #define LLVM_IR_USELISTORDER_H
  16
  17 #include <cstddef>
  18 #include <vector>
  19
  20 namespace llvm {
  21
  22 class Function;
  23 class Value;
  24
  25 /// Structure to hold a use-list order.
  26 struct UseListOrder {
  27   const Value *V = nullptr;
  28   const Function *F = nullptr;
  29   std::vector<unsigned> Shuffle;
  30
  31   UseListOrder(const Value *V, const Function *F, size_t ShuffleSize)
  32       : V(V), F(F), Shuffle(ShuffleSize) {}
  33
  34   UseListOrder() = default;
  35   UseListOrder(UseListOrder &&) = default;
  36   UseListOrder &operator=(UseListOrder &&) = default;
  37 };
  38
  39 using UseListOrderStack = std::vector<UseListOrder>;
  40
  41 } // end namespace llvm
  42
  43 #endif // LLVM_IR_USELISTORDER_H