Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- 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