[PATCH] D71374: Improve support of GNU mempcpy

[serge via Phabricator via cfe-commits]

serge-sans-paille added a comment.

In D71374#1783245 <https://reviews.llvm.org/D71374#1783245>, @xbolva00 wrote:

> LLVM already converts mempcpy to memcpy..


Indeed, the clang version I was using as base reference was clang-9, and the mempcpy optimisation at IR level got introduced after that.
Nevertheless, this patch does much more than lowering mempcpy, it also triggers new warnings, so It's still useful that clang understands it.

@xbolva00 should I remove the lowering part and leave it to llvm?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D71374/new/

https://reviews.llvm.org/D71374