llvm/llvm/lib/CodeGen/LazyMachineBlockFrequencyInfo.cpp

///===- LazyMachineBlockFrequencyInfo.cpp - Lazy Machine Block Frequency --===//
///
/// 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
///
///===---------------------------------------------------------------------===//
/// \file
/// This is an alternative analysis pass to MachineBlockFrequencyInfo.  The
/// difference is that with this pass the block frequencies are not computed
/// when the analysis pass is executed but rather when the BFI result is
/// explicitly requested by the analysis client.
///
///===---------------------------------------------------------------------===//

#include "llvm/CodeGen/LazyMachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
#include "llvm/InitializePasses.h"

usingnamespacellvm;

#define DEBUG_TYPE …

INITIALIZE_PASS_BEGIN(LazyMachineBlockFrequencyInfoPass, DEBUG_TYPE,
                      "Lazy Machine Block Frequency Analysis", true, true)
INITIALIZE_PASS_DEPENDENCY(MachineBranchProbabilityInfoWrapperPass)
INITIALIZE_PASS_DEPENDENCY(MachineLoopInfoWrapperPass)
INITIALIZE_PASS_END(LazyMachineBlockFrequencyInfoPass, DEBUG_TYPE,
                    "Lazy Machine Block Frequency Analysis", true, true)

char LazyMachineBlockFrequencyInfoPass::ID = …;

LazyMachineBlockFrequencyInfoPass::LazyMachineBlockFrequencyInfoPass()
    : … { … }

void LazyMachineBlockFrequencyInfoPass::getAnalysisUsage(
    AnalysisUsage &AU) const { … }

void LazyMachineBlockFrequencyInfoPass::releaseMemory() { … }

MachineBlockFrequencyInfo &
LazyMachineBlockFrequencyInfoPass::calculateIfNotAvailable() const { … }

bool LazyMachineBlockFrequencyInfoPass::runOnMachineFunction(
    MachineFunction &F) { … }