[PATCH] D117499: [CodeGen] Support extracting fixed-length vectors from illegal scalable vectors

[David Sherwood via Phabricator via llvm-commits]

david-arm added a comment.

Hi @efriedma, if it's ok with you I'd like to leave the spilling and reloading from the stack if that's ok? As you say, there may be situations where we can improve this with a select, but the crux of this patch is to fix a bug. If we see performance issues in future we can always revisit this?

I've also added checks for the case you described, extracting a legal fixed-width predicate subvector.


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