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  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
  44.