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/ADT/Optional.h"
19 #include "llvm/Support/BlockFrequency.h"
20 
21 namespace llvm {
22 
23 class MachineBasicBlock;
24 class MachineBlockFrequencyInfo;
25 
26 class MBFIWrapper {
27  public:
28   MBFIWrapper(const MachineBlockFrequencyInfo &I) : MBFI(I) {}
29 
30   BlockFrequency getBlockFreq(const MachineBasicBlock *MBB) const;
31   void setBlockFreq(const MachineBasicBlock *MBB, BlockFrequency F);
32   Optional<uint64_t> getBlockProfileCount(const MachineBasicBlock *MBB) const;
33 
34   raw_ostream &printBlockFreq(raw_ostream &OS,
35                               const MachineBasicBlock *MBB) const;
36   raw_ostream &printBlockFreq(raw_ostream &OS,
37                               const BlockFrequency Freq) const;
38   void view(const Twine &Name, bool isSimple = true);
39   uint64_t getEntryFreq() const;
40   const MachineBlockFrequencyInfo &getMBFI() { return MBFI; }
41 
42  private:
43   const MachineBlockFrequencyInfo &MBFI;
44   DenseMap<const MachineBasicBlock *, BlockFrequency> MergedBBFreq;
45 };
46 
47 } // end namespace llvm
48 
49 #endif // LLVM_CODEGEN_MBFIWRAPPER_H
50