MBFIWrapper.h

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//===- llvm/CodeGen/MBFIWrapper.h -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This class keeps track of branch frequencies of newly created blocks and
// tail-merged blocks. Used by the TailDuplication and MachineBlockPlacement.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_CODEGEN_MBFIWRAPPER_H
#define LLVM_CODEGEN_MBFIWRAPPER_H
 
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/BlockFrequency.h"
#include "llvm/Support/raw_ostream.h"
#include <optional>
 
namespace llvm {
 
class MachineBasicBlock;
class MachineBlockFrequencyInfo;
 
class MBFIWrapper {
 public:
  MBFIWrapper(const MachineBlockFrequencyInfo &I) : MBFI(I) {}
 
  BlockFrequency getBlockFreq(const MachineBasicBlock *MBB) const;
  void setBlockFreq(const MachineBasicBlock *MBB, BlockFrequency F);
  std::optional<uint64_t>
  getBlockProfileCount(const MachineBasicBlock *MBB) const;
 
  raw_ostream &printBlockFreq(raw_ostream &OS,
                              const MachineBasicBlock *MBB) const;
  raw_ostream &printBlockFreq(raw_ostream &OS,
                              const BlockFrequency Freq) const;
  void view(const Twine &Name, bool isSimple = true);
  uint64_t getEntryFreq() const;
  const MachineBlockFrequencyInfo &getMBFI() { return MBFI; }
 
 private:
  const MachineBlockFrequencyInfo &MBFI;
  DenseMap<const MachineBasicBlock *, BlockFrequency> MergedBBFreq;
};
 
} // end namespace llvm
 
#endif // LLVM_CODEGEN_MBFIWRAPPER_H