[PATCH] D102404: [InstCombine] Add instcombine fold for extractelement + splat for scalable vectors

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

This is not what I had in mind. If we are not creating a new instruction, then we should try to get this into -instsimplify:
https://github.com/llvm/llvm-project/blob/6c92215e07f41cb566d54599e891180fe2ddbea5/llvm/lib/Analysis/InstructionSimplify.cpp#L4492

That's where we handle fixed-length vector splat+extract. Can we add to or adjust the underlying analysis there to handle scalable vectors?


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https://reviews.llvm.org/D102404