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| //===- llvm/Transforms/Utils/SizeOpts.h - size optimization -----*- C++ -*-===//
//
// 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 code size optimization related code.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_UTILS_SIZEOPTS_H
#define LLVM_TRANSFORMS_UTILS_SIZEOPTS_H
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Support/CommandLine.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 llvm {
class BasicBlock;
class BlockFrequencyInfo;
class Function;
class ProfileSummaryInfo;
template<typename AdapterT, typename FuncT, typename BFIT>
bool shouldFuncOptimizeForSizeImpl(const FuncT *F, ProfileSummaryInfo *PSI,
BFIT *BFI) {
assert(F);
if (!PSI || !BFI || !PSI->hasProfileSummary())
return false;
if (ForcePGSO)
return true;
if (!EnablePGSO)
return false;
if (PGSOLargeWorkingSetSizeOnly && !PSI->hasLargeWorkingSetSize()) {
// Even if the working set size isn't large, size-optimize cold code.
return AdapterT::isFunctionColdInCallGraph(F, PSI, *BFI);
}
return !AdapterT::isFunctionHotInCallGraphNthPercentile(
PSI->hasSampleProfile() ? PgsoCutoffSampleProf : PgsoCutoffInstrProf,
F, PSI, *BFI);
}
template<typename AdapterT, typename BlockT, typename BFIT>
bool shouldOptimizeForSizeImpl(const BlockT *BB, ProfileSummaryInfo *PSI,
BFIT *BFI) {
assert(BB);
if (!PSI || !BFI || !PSI->hasProfileSummary())
return false;
if (ForcePGSO)
return true;
if (!EnablePGSO)
return false;
if (PGSOLargeWorkingSetSizeOnly && !PSI->hasLargeWorkingSetSize()) {
// Even if the working set size isn't large, size-optimize cold code.
return AdapterT::isColdBlock(BB, PSI, BFI);
}
return !AdapterT::isHotBlockNthPercentile(
PSI->hasSampleProfile() ? PgsoCutoffSampleProf : PgsoCutoffInstrProf,
BB, PSI, BFI);
}
/// Returns true if function \p F is suggested to be size-optimized base on the
/// profile.
bool shouldOptimizeForSize(const Function *F, ProfileSummaryInfo *PSI,
BlockFrequencyInfo *BFI);
/// Returns true if basic block \p BB is suggested to be size-optimized base
/// on the profile.
bool shouldOptimizeForSize(const BasicBlock *BB, ProfileSummaryInfo *PSI,
BlockFrequencyInfo *BFI);
} // end namespace llvm
#endif // LLVM_TRANSFORMS_UTILS_SIZEOPTS_H
|