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  1. //===- llvm/CodeGen/MBFIWrapper.h -------------------------------*- 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 class keeps track of branch frequencies of newly created blocks and
  10. // tail-merged blocks. Used by the TailDuplication and MachineBlockPlacement.
  11. //
  12. //===----------------------------------------------------------------------===//
  13.  
  14. #ifndef LLVM_CODEGEN_MBFIWRAPPER_H
  15. #define LLVM_CODEGEN_MBFIWRAPPER_H
  16.  
  17. #include "llvm/ADT/DenseMap.h"
  18. #include "llvm/Support/BlockFrequency.h"
  19. #include "llvm/Support/raw_ostream.h"
  20. #include <optional>
  21.  
  22. namespace llvm {
  23.  
  24. class MachineBasicBlock;
  25. class MachineBlockFrequencyInfo;
  26.  
  27. class MBFIWrapper {
  28.  public:
  29.   MBFIWrapper(const MachineBlockFrequencyInfo &I) : MBFI(I) {}
  30.  
  31.   BlockFrequency getBlockFreq(const MachineBasicBlock *MBB) const;
  32.   void setBlockFreq(const MachineBasicBlock *MBB, BlockFrequency F);
  33.   std::optional<uint64_t>
  34.   getBlockProfileCount(const MachineBasicBlock *MBB) const;
  35.  
  36.   raw_ostream &printBlockFreq(raw_ostream &OS,
  37.                               const MachineBasicBlock *MBB) const;
  38.   raw_ostream &printBlockFreq(raw_ostream &OS,
  39.                               const BlockFrequency Freq) const;
  40.   void view(const Twine &Name, bool isSimple = true);
  41.   uint64_t getEntryFreq() const;
  42.   const MachineBlockFrequencyInfo &getMBFI() { return MBFI; }
  43.  
  44.  private:
  45.   const MachineBlockFrequencyInfo &MBFI;
  46.   DenseMap<const MachineBasicBlock *, BlockFrequency> MergedBBFreq;
  47. };
  48.  
  49. } // end namespace llvm
  50.  
  51. #endif // LLVM_CODEGEN_MBFIWRAPPER_H
  52.