forked from OSchip/llvm-project
123 lines
4.7 KiB
C++
123 lines
4.7 KiB
C++
//===- MachineSizeOpts.cpp - code size optimization related code ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains some shared machine IR code size optimization related
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// code.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineSizeOpts.h"
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#include "llvm/Analysis/ProfileSummaryInfo.h"
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#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
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using namespace llvm;
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extern cl::opt<bool> EnablePGSO;
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extern cl::opt<bool> PGSOLargeWorkingSetSizeOnly;
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extern cl::opt<bool> ForcePGSO;
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extern cl::opt<int> PgsoCutoffInstrProf;
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extern cl::opt<int> PgsoCutoffSampleProf;
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namespace machine_size_opts_detail {
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/// Like ProfileSummaryInfo::isColdBlock but for MachineBasicBlock.
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bool isColdBlock(const MachineBasicBlock *MBB,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo *MBFI) {
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auto Count = MBFI->getBlockProfileCount(MBB);
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return Count && PSI->isColdCount(*Count);
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}
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/// Like ProfileSummaryInfo::isHotBlockNthPercentile but for MachineBasicBlock.
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static bool isHotBlockNthPercentile(int PercentileCutoff,
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const MachineBasicBlock *MBB,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo *MBFI) {
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auto Count = MBFI->getBlockProfileCount(MBB);
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return Count && PSI->isHotCountNthPercentile(PercentileCutoff, *Count);
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}
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/// Like ProfileSummaryInfo::isFunctionColdInCallGraph but for
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/// MachineFunction.
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bool isFunctionColdInCallGraph(
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const MachineFunction *MF,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo &MBFI) {
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if (auto FunctionCount = MF->getFunction().getEntryCount())
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if (!PSI->isColdCount(FunctionCount.getCount()))
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return false;
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for (const auto &MBB : *MF)
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if (!isColdBlock(&MBB, PSI, &MBFI))
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return false;
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return true;
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}
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/// Like ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile but for
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/// MachineFunction.
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bool isFunctionHotInCallGraphNthPercentile(
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int PercentileCutoff,
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const MachineFunction *MF,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo &MBFI) {
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if (auto FunctionCount = MF->getFunction().getEntryCount())
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if (PSI->isHotCountNthPercentile(PercentileCutoff,
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FunctionCount.getCount()))
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return true;
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for (const auto &MBB : *MF)
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if (isHotBlockNthPercentile(PercentileCutoff, &MBB, PSI, &MBFI))
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return true;
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return false;
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}
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} // namespace machine_size_opts_detail
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namespace {
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struct MachineBasicBlockBFIAdapter {
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static bool isFunctionColdInCallGraph(const MachineFunction *MF,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo &MBFI) {
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return machine_size_opts_detail::isFunctionColdInCallGraph(MF, PSI, MBFI);
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}
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static bool isFunctionHotInCallGraphNthPercentile(
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int CutOff,
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const MachineFunction *MF,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo &MBFI) {
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return machine_size_opts_detail::isFunctionHotInCallGraphNthPercentile(
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CutOff, MF, PSI, MBFI);
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}
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static bool isColdBlock(const MachineBasicBlock *MBB,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo *MBFI) {
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return machine_size_opts_detail::isColdBlock(MBB, PSI, MBFI);
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}
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static bool isHotBlockNthPercentile(int CutOff,
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const MachineBasicBlock *MBB,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo *MBFI) {
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return machine_size_opts_detail::isHotBlockNthPercentile(
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CutOff, MBB, PSI, MBFI);
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}
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};
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} // end anonymous namespace
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bool llvm::shouldOptimizeForSize(const MachineFunction *MF,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo *MBFI,
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PGSOQueryType QueryType) {
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return shouldFuncOptimizeForSizeImpl<MachineBasicBlockBFIAdapter>(
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MF, PSI, MBFI, QueryType);
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}
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bool llvm::shouldOptimizeForSize(const MachineBasicBlock *MBB,
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ProfileSummaryInfo *PSI,
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const MachineBlockFrequencyInfo *MBFI,
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PGSOQueryType QueryType) {
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return shouldOptimizeForSizeImpl<MachineBasicBlockBFIAdapter>(
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MBB, PSI, MBFI, QueryType);
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}
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