Skip to content

[MemCpyOpt] Forward memcpy source to load instruction #138490

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 4 commits into from
Closed

[MemCpyOpt] Forward memcpy source to load instruction #138490

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
cfb9991
Pre-commit test cases
dianqk May 4, 2025
0fd9da5
[MemCpyOpt] Forward memcpy source to load instruction
dianqk May 4, 2025
0fb1679
[InstCombine] Accumulate the limit only on the instructions that require
dianqk May 4, 2025
6efcb44
Revert "[InstCombine] Accumulate the limit only on the instructions t…
dianqk May 4, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 11 additions & 3 deletions llvm/include/llvm/Transforms/Scalar/MemCpyOptimizer.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
#ifndef LLVM_TRANSFORMS_SCALAR_MEMCPYOPTIMIZER_H
#define LLVM_TRANSFORMS_SCALAR_MEMCPYOPTIMIZER_H

#include "llvm/Analysis/MemoryLocation.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/PassManager.h"

Expand Down Expand Up @@ -64,21 +65,28 @@ class MemCpyOptPass : public PassInfoMixin<MemCpyOptPass> {
private:
// Helper functions
bool processStore(StoreInst *SI, BasicBlock::iterator &BBI);
bool processLoad(LoadInst *LI, BasicBlock::iterator &BBI,
SmallVectorImpl<Instruction *> &NewInsts);
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 processMemCpy(MemCpyInst *M, BasicBlock::iterator &BBI,
SmallVectorImpl<Instruction *> &NewInsts);
bool processMemMove(MemMoveInst *M, BasicBlock::iterator &BBI);
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);
BatchAAResults &BAA,
SmallVectorImpl<Instruction *> &NewInsts);
bool processMemSetMemCpyDependence(MemCpyInst *MemCpy, MemSetInst *MemSet,
BatchAAResults &BAA);
bool performMemCpyToMemSetOptzn(MemCpyInst *MemCpy, MemSetInst *MemSet,
BatchAAResults &BAA);
bool findNewSrc(MemCpyInst *MDep, Instruction *UseInstr, BatchAAResults &BAA,
Value *&NewSrc, MaybeAlign &NewAlign,
SmallVectorImpl<Instruction *> &NewInsts);
bool processByValArgument(CallBase &CB, unsigned ArgNo);
bool processImmutArgument(CallBase &CB, unsigned ArgNo);
Instruction *tryMergingIntoMemset(Instruction *I, Value *StartPtr,
Expand All @@ -90,7 +98,7 @@ class MemCpyOptPass : public PassInfoMixin<MemCpyOptPass> {
bool isMemMoveMemSetDependency(MemMoveInst *M);

void eraseInstruction(Instruction *I);
bool iterateOnFunction(Function &F);
bool iterateOnFunction(Function &F, SmallVectorImpl<Instruction *> &NewInsts);
};

} // end namespace llvm
Expand Down
Loading
Loading