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| //===- MachineSizeOpts.cpp - code size optimization related code ----------===//
//
// 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 file contains some shared machine IR code size optimization related
// code.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineSizeOpts.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
using namespace llvm;
extern cl::opt<bool> EnablePGSO;
extern cl::opt<bool> PGSOLargeWorkingSetSizeOnly;
extern cl::opt<bool> ForcePGSO;
extern cl::opt<int> PgsoCutoffInstrProf;
extern cl::opt<int> PgsoCutoffSampleProf;
namespace machine_size_opts_detail {
/// Like ProfileSummaryInfo::isColdBlock but for MachineBasicBlock.
bool isColdBlock(const MachineBasicBlock *MBB,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo *MBFI) {
auto Count = MBFI->getBlockProfileCount(MBB);
return Count && PSI->isColdCount(*Count);
}
/// Like ProfileSummaryInfo::isHotBlockNthPercentile but for MachineBasicBlock.
static bool isHotBlockNthPercentile(int PercentileCutoff,
const MachineBasicBlock *MBB,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo *MBFI) {
auto Count = MBFI->getBlockProfileCount(MBB);
return Count && PSI->isHotCountNthPercentile(PercentileCutoff, *Count);
}
/// Like ProfileSummaryInfo::isFunctionColdInCallGraph but for
/// MachineFunction.
bool isFunctionColdInCallGraph(
const MachineFunction *MF,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo &MBFI) {
if (auto FunctionCount = MF->getFunction().getEntryCount())
if (!PSI->isColdCount(FunctionCount.getCount()))
return false;
for (const auto &MBB : *MF)
if (!isColdBlock(&MBB, PSI, &MBFI))
return false;
return true;
}
/// Like ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile but for
/// MachineFunction.
bool isFunctionHotInCallGraphNthPercentile(
int PercentileCutoff,
const MachineFunction *MF,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo &MBFI) {
if (auto FunctionCount = MF->getFunction().getEntryCount())
if (PSI->isHotCountNthPercentile(PercentileCutoff,
FunctionCount.getCount()))
return true;
for (const auto &MBB : *MF)
if (isHotBlockNthPercentile(PercentileCutoff, &MBB, PSI, &MBFI))
return true;
return false;
}
} // namespace machine_size_opts_detail
namespace {
struct MachineBasicBlockBFIAdapter {
static bool isFunctionColdInCallGraph(const MachineFunction *MF,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo &MBFI) {
return machine_size_opts_detail::isFunctionColdInCallGraph(MF, PSI, MBFI);
}
static bool isFunctionHotInCallGraphNthPercentile(
int CutOff,
const MachineFunction *MF,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo &MBFI) {
return machine_size_opts_detail::isFunctionHotInCallGraphNthPercentile(
CutOff, MF, PSI, MBFI);
}
static bool isColdBlock(const MachineBasicBlock *MBB,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo *MBFI) {
return machine_size_opts_detail::isColdBlock(MBB, PSI, MBFI);
}
static bool isHotBlockNthPercentile(int CutOff,
const MachineBasicBlock *MBB,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo *MBFI) {
return machine_size_opts_detail::isHotBlockNthPercentile(
CutOff, MBB, PSI, MBFI);
}
};
} // end anonymous namespace
bool llvm::shouldOptimizeForSize(const MachineFunction *MF,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo *MBFI) {
return shouldFuncOptimizeForSizeImpl<MachineBasicBlockBFIAdapter>(
MF, PSI, MBFI);
}
bool llvm::shouldOptimizeForSize(const MachineBasicBlock *MBB,
ProfileSummaryInfo *PSI,
const MachineBlockFrequencyInfo *MBFI) {
return shouldOptimizeForSizeImpl<MachineBasicBlockBFIAdapter>(
MBB, PSI, MBFI);
}
|