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📄 ADCE.h(1.38 KB)
📄 AlignmentFromAssumptions.h(1.6 KB)
📄 BDCE.h(1.04 KB)
📄 CallSiteSplitting.h(810 B)
📄 ConstantHoisting.h(8.02 KB)
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📄 DCE.h(892 B)
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📄 EarlyCSE.h(1.41 KB)
📄 Float2Int.h(1.74 KB)
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📄 IVUsersPrinter.h(960 B)
📄 IndVarSimplify.h(1.03 KB)
📄 InductiveRangeCheckElimination.h(950 B)
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📄 JumpThreading.h(6.55 KB)
📄 LICM.h(2.78 KB)
📄 LoopAccessAnalysisPrinter.h(999 B)
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📄 LoopIdiomRecognize.h(1.18 KB)
📄 LoopInstSimplify.h(1.07 KB)
📄 LoopLoadElimination.h(1.1 KB)
📄 LoopPassManager.h(15.85 KB)
📄 LoopPredication.h(1.12 KB)
📄 LoopRotation.h(1.13 KB)
📄 LoopSimplifyCFG.h(1.31 KB)
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📄 LoopStrengthReduce.h(1.52 KB)
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📄 LowerAtomic.h(974 B)
📄 LowerConstantIntrinsics.h(1.4 KB)
📄 LowerExpectIntrinsic.h(1.25 KB)
📄 LowerGuardIntrinsic.h(992 B)
📄 LowerMatrixIntrinsics.h(868 B)
📄 LowerWidenableCondition.h(937 B)
📄 MakeGuardsExplicit.h(1.85 KB)
📄 MemCpyOptimizer.h(2.71 KB)
📄 MergeICmps.h(714 B)
📄 MergedLoadStoreMotion.h(2.02 KB)
📄 NaryReassociate.h(6.98 KB)
📄 NewGVN.h(935 B)
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📄 Reassociate.h(4.6 KB)
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📄 Scalarizer.h(1.18 KB)
📄 SimpleLoopUnswitch.h(3.35 KB)
📄 SimplifyCFG.h(2.01 KB)
📄 Sink.h(998 B)
📄 SpeculateAroundPHIs.h(3.69 KB)
📄 SpeculativeExecution.h(3.04 KB)
📄 TailRecursionElimination.h(3.3 KB)
📄 WarnMissedTransforms.h(1.19 KB)

Editing: MemCpyOptimizer.h

//===- MemCpyOptimizer.h - memcpy 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 pass performs various transformations related to eliminating memcpy
// calls, or transforming sets of stores into memset's.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_SCALAR_MEMCPYOPTIMIZER_H
#define LLVM_TRANSFORMS_SCALAR_MEMCPYOPTIMIZER_H

#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/PassManager.h"
#include <cstdint>
#include <functional>

namespace llvm {

class AssumptionCache;
class CallInst;
class DominatorTree;
class Function;
class Instruction;
class MemCpyInst;
class MemMoveInst;
class MemoryDependenceResults;
class MemSetInst;
class StoreInst;
class TargetLibraryInfo;
class Value;

class MemCpyOptPass : public PassInfoMixin<MemCpyOptPass> {
  MemoryDependenceResults *MD = nullptr;
  TargetLibraryInfo *TLI = nullptr;
  std::function<AliasAnalysis &()> LookupAliasAnalysis;
  std::function<AssumptionCache &()> LookupAssumptionCache;
  std::function<DominatorTree &()> LookupDomTree;

public:
  MemCpyOptPass() = default;

PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);

// Glue for the old PM.
  bool runImpl(Function &F, MemoryDependenceResults *MD_,
               TargetLibraryInfo *TLI_,
               std::function<AliasAnalysis &()> LookupAliasAnalysis_,
               std::function<AssumptionCache &()> LookupAssumptionCache_,
               std::function<DominatorTree &()> LookupDomTree_);

private:
  // Helper functions
  bool processStore(StoreInst *SI, BasicBlock::iterator &BBI);
  bool processMemSet(MemSetInst *SI, BasicBlock::iterator &BBI);
  bool processMemCpy(MemCpyInst *M, BasicBlock::iterator &BBI);
  bool processMemMove(MemMoveInst *M);
  bool performCallSlotOptzn(Instruction *cpy, Value *cpyDst, Value *cpySrc,
                            uint64_t cpyLen, Align cpyAlign, CallInst *C);
  bool processMemCpyMemCpyDependence(MemCpyInst *M, MemCpyInst *MDep);
  bool processMemSetMemCpyDependence(MemCpyInst *MemCpy, MemSetInst *MemSet);
  bool performMemCpyToMemSetOptzn(MemCpyInst *MemCpy, MemSetInst *MemSet);
  bool processByValArgument(CallBase &CB, unsigned ArgNo);
  Instruction *tryMergingIntoMemset(Instruction *I, Value *StartPtr,
                                    Value *ByteVal);

bool iterateOnFunction(Function &F);
};

} // end namespace llvm

#endif // LLVM_TRANSFORMS_SCALAR_MEMCPYOPTIMIZER_H

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