[PATCH] D56796: [DAGCombiner][x86] add transform/hook to vectorize: cast(extract V, Y)

[Ulrich Weigand via Phabricator via llvm-commits]

uweigand added a comment.

Thanks for the heads-up!  This may indeed be interesting for SystemZ, but I think it's still probably preferable to do it in the back-end like your alternative approach does, that will allow us to handle some special instruction selection issues we'll likely run into ...


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  https://reviews.llvm.org/D56796/new/

https://reviews.llvm.org/D56796