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Editing: HotColdSplitting.h
//===- HotColdSplitting.h ---- Outline Cold Regions -------------*- 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 pass outlines cold regions to a separate function. // //===----------------------------------------------------------------------===// #ifndef LLVM_TRANSFORMS_IPO_HOTCOLDSPLITTING_H #define LLVM_TRANSFORMS_IPO_HOTCOLDSPLITTING_H #include "llvm/IR/PassManager.h" #include "llvm/Support/BranchProbability.h" namespace llvm { class Module; class ProfileSummaryInfo; class BasicBlock; class BlockFrequencyInfo; class TargetTransformInfo; class OptimizationRemarkEmitter; class AssumptionCache; class DominatorTree; class CodeExtractor; class CodeExtractorAnalysisCache; /// A sequence of basic blocks. /// /// A 0-sized SmallVector is slightly cheaper to move than a std::vector. using BlockSequence = SmallVector<BasicBlock *, 0>; class HotColdSplitting { public: HotColdSplitting(ProfileSummaryInfo *ProfSI, function_ref<BlockFrequencyInfo *(Function &)> GBFI, function_ref<TargetTransformInfo &(Function &)> GTTI, std::function<OptimizationRemarkEmitter &(Function &)> *GORE, function_ref<AssumptionCache *(Function &)> LAC) : PSI(ProfSI), GetBFI(GBFI), GetTTI(GTTI), GetORE(GORE), LookupAC(LAC) {} bool run(Module &M); private: bool isFunctionCold(const Function &F) const; bool isBasicBlockCold(BasicBlock *BB, BranchProbability ColdProbThresh, SmallPtrSetImpl<BasicBlock *> &AnnotatedColdBlocks, BlockFrequencyInfo *BFI) const; bool shouldOutlineFrom(const Function &F) const; bool outlineColdRegions(Function &F, bool HasProfileSummary); bool isSplittingBeneficial(CodeExtractor &CE, const BlockSequence &Region, TargetTransformInfo &TTI); Function *extractColdRegion(BasicBlock &EntryPoint, CodeExtractor &CE, const CodeExtractorAnalysisCache &CEAC, BlockFrequencyInfo *BFI, TargetTransformInfo &TTI, OptimizationRemarkEmitter &ORE); ProfileSummaryInfo *PSI; function_ref<BlockFrequencyInfo *(Function &)> GetBFI; function_ref<TargetTransformInfo &(Function &)> GetTTI; std::function<OptimizationRemarkEmitter &(Function &)> *GetORE; function_ref<AssumptionCache *(Function &)> LookupAC; }; /// Pass to outline cold regions. class HotColdSplittingPass : public PassInfoMixin<HotColdSplittingPass> { public: PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM); }; } // end namespace llvm #endif // LLVM_TRANSFORMS_IPO_HOTCOLDSPLITTING_H
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