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