6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
96 lines
3.4 KiB
C++
96 lines
3.4 KiB
C++
//===- 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/IR/BasicBlock.h"
|
|
#include "llvm/IR/PassManager.h"
|
|
|
|
namespace llvm {
|
|
|
|
class AAResults;
|
|
class AllocaInst;
|
|
class BatchAAResults;
|
|
class AssumptionCache;
|
|
class CallBase;
|
|
class CallInst;
|
|
class DominatorTree;
|
|
class Function;
|
|
class Instruction;
|
|
class LoadInst;
|
|
class MemCpyInst;
|
|
class MemMoveInst;
|
|
class MemorySSA;
|
|
class MemorySSAUpdater;
|
|
class MemSetInst;
|
|
class PostDominatorTree;
|
|
class StoreInst;
|
|
class TargetLibraryInfo;
|
|
class TypeSize;
|
|
class Value;
|
|
|
|
class MemCpyOptPass : public PassInfoMixin<MemCpyOptPass> {
|
|
TargetLibraryInfo *TLI = nullptr;
|
|
AAResults *AA = nullptr;
|
|
AssumptionCache *AC = nullptr;
|
|
DominatorTree *DT = nullptr;
|
|
PostDominatorTree *PDT = nullptr;
|
|
MemorySSA *MSSA = nullptr;
|
|
MemorySSAUpdater *MSSAU = nullptr;
|
|
|
|
public:
|
|
MemCpyOptPass() = default;
|
|
|
|
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
|
|
|
|
// Glue for the old PM.
|
|
bool runImpl(Function &F, TargetLibraryInfo *TLI, AAResults *AA,
|
|
AssumptionCache *AC, DominatorTree *DT, PostDominatorTree *PDT,
|
|
MemorySSA *MSSA);
|
|
|
|
private:
|
|
// Helper functions
|
|
bool processStore(StoreInst *SI, BasicBlock::iterator &BBI);
|
|
bool processStoreOfLoad(StoreInst *SI, LoadInst *LI, const DataLayout &DL,
|
|
BasicBlock::iterator &BBI);
|
|
bool processMemSet(MemSetInst *SI, BasicBlock::iterator &BBI);
|
|
bool processMemCpy(MemCpyInst *M, BasicBlock::iterator &BBI);
|
|
bool processMemMove(MemMoveInst *M);
|
|
bool performCallSlotOptzn(Instruction *cpyLoad, Instruction *cpyStore,
|
|
Value *cpyDst, Value *cpySrc, TypeSize cpyLen,
|
|
Align cpyAlign, BatchAAResults &BAA,
|
|
std::function<CallInst *()> GetC);
|
|
bool processMemCpyMemCpyDependence(MemCpyInst *M, MemCpyInst *MDep,
|
|
BatchAAResults &BAA);
|
|
bool processMemSetMemCpyDependence(MemCpyInst *MemCpy, MemSetInst *MemSet,
|
|
BatchAAResults &BAA);
|
|
bool performMemCpyToMemSetOptzn(MemCpyInst *MemCpy, MemSetInst *MemSet,
|
|
BatchAAResults &BAA);
|
|
bool processByValArgument(CallBase &CB, unsigned ArgNo);
|
|
bool processImmutArgument(CallBase &CB, unsigned ArgNo);
|
|
Instruction *tryMergingIntoMemset(Instruction *I, Value *StartPtr,
|
|
Value *ByteVal);
|
|
bool moveUp(StoreInst *SI, Instruction *P, const LoadInst *LI);
|
|
bool performStackMoveOptzn(Instruction *Load, Instruction *Store,
|
|
AllocaInst *DestAlloca, AllocaInst *SrcAlloca,
|
|
TypeSize Size, BatchAAResults &BAA);
|
|
|
|
void eraseInstruction(Instruction *I);
|
|
bool iterateOnFunction(Function &F);
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_TRANSFORMS_SCALAR_MEMCPYOPTIMIZER_H
|