| 1 | //===- MBFIWrapper.cpp - MachineBlockFrequencyInfo wrapper ----------------===// |
|---|---|
| 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 | #include "llvm/CodeGen/MachineBlockFrequencyInfo.h" |
| 15 | #include "llvm/CodeGen/MBFIWrapper.h" |
| 16 | #include <optional> |
| 17 | |
| 18 | using namespace llvm; |
| 19 | |
| 20 | BlockFrequency MBFIWrapper::getBlockFreq(const MachineBasicBlock *MBB) const { |
| 21 | auto I = MergedBBFreq.find(Val: MBB); |
| 22 | |
| 23 | if (I != MergedBBFreq.end()) |
| 24 | return I->second; |
| 25 | |
| 26 | return MBFI.getBlockFreq(MBB); |
| 27 | } |
| 28 | |
| 29 | void MBFIWrapper::setBlockFreq(const MachineBasicBlock *MBB, |
| 30 | BlockFrequency F) { |
| 31 | MergedBBFreq[MBB] = F; |
| 32 | } |
| 33 | |
| 34 | std::optional<uint64_t> |
| 35 | MBFIWrapper::getBlockProfileCount(const MachineBasicBlock *MBB) const { |
| 36 | auto I = MergedBBFreq.find(Val: MBB); |
| 37 | |
| 38 | // Modified block frequency also impacts profile count. So we should compute |
| 39 | // profile count from new block frequency if it has been changed. |
| 40 | if (I != MergedBBFreq.end()) |
| 41 | return MBFI.getProfileCountFromFreq(Freq: I->second); |
| 42 | |
| 43 | return MBFI.getBlockProfileCount(MBB); |
| 44 | } |
| 45 | |
| 46 | void MBFIWrapper::view(const Twine &Name, bool isSimple) { |
| 47 | MBFI.view(Name, isSimple); |
| 48 | } |
| 49 | |
| 50 | BlockFrequency MBFIWrapper::getEntryFreq() const { return MBFI.getEntryFreq(); } |
| 51 |