[llvm] [MemCpyOptimizer] Fix scalable vector crash calling performStackMoveO… (PR #67632)
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Wed Sep 27 23:50:22 PDT 2023
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@@ -1428,8 +1428,12 @@ bool MemCpyOptPass::performMemCpyToMemSetOptzn(MemCpyInst *MemCpy,
// allocas that aren't captured.
bool MemCpyOptPass::performStackMoveOptzn(Instruction *Load, Instruction *Store,
AllocaInst *DestAlloca,
- AllocaInst *SrcAlloca, uint64_t Size,
+ AllocaInst *SrcAlloca, TypeSize Size,
BatchAAResults &BAA) {
+ // We can't optimize scalable types.
+ if (Size.isScalable())
+ return false;
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nikic wrote:
You can instead replace the `Size != SrcSize->getFixedValue()` with `Size != SrcSize` below? (and same with DestSize).
https://github.com/llvm/llvm-project/pull/67632
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