[PATCH] D91937: [ISel] Port AArch64 SABD and UABD to DAGCombine

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

I still need to do something with D91921 <https://reviews.llvm.org/D91921> before it can be used with MVE. I was working on that, but it was a bit slow going and other things had come up in the meantime. I was looking at it recently to try and improve trunc/extend lowering, but need to get some time to sort through that properly. There is also some stuff to do with the way that MVE wants to do lane interleaving that I thought might be an issue, but I'm pretty sure that will be fine.

This part can go in if we need it I think. But the MVE side won't be working well yet, and so there won't be another user other than AArch64.


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  https://reviews.llvm.org/D91937/new/

https://reviews.llvm.org/D91937