| Issue |
133984
|
| Summary |
MemcpyOpt doesn't strip TBAA correctly
|
| Labels |
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| Assignees |
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| Reporter |
gbaraldi
|
While debugging https://github.com/JuliaLang/julia/issues/57959. It got minimized to what looks to be a bug in MemCpyOpt, where it strips the noalias attribute of a memcpy https://github.com/llvm/llvm-project/blob/3c7a0e6c826b8bcfa4ec6154fd4247658ca3a03f/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp#L1682-L1688 but not the other aliasing metadatas (tbaa,tbaa.struct). Probably using `combineMetadata` as used elsewhere in the pass
@khei4 was the one that originally added this optimization
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