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//===- MBFIWrapper.cpp - MachineBlockFrequencyInfo wrapper ----------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MBFIWrapper.h"
#include <optional>
using namespace llvm;
BlockFrequency MBFIWrapper::getBlockFreq(const MachineBasicBlock *MBB) const {
auto I = MergedBBFreq.find(MBB);
if (I != MergedBBFreq.end())
return I->second;
return MBFI.getBlockFreq(MBB);
}
void MBFIWrapper::setBlockFreq(const MachineBasicBlock *MBB,
BlockFrequency F) {
MergedBBFreq[MBB] = F;
}
std::optional<uint64_t>
MBFIWrapper::getBlockProfileCount(const MachineBasicBlock *MBB) const {
auto I = MergedBBFreq.find(MBB);
// Modified block frequency also impacts profile count. So we should compute
// profile count from new block frequency if it has been changed.
if (I != MergedBBFreq.end())
return MBFI.getProfileCountFromFreq(I->second);
return MBFI.getBlockProfileCount(MBB);
}
void MBFIWrapper::view(const Twine &Name, bool isSimple) {
MBFI.view(Name, isSimple);
}
BlockFrequency MBFIWrapper::getEntryFreq() const { return MBFI.getEntryFreq(); }
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