[PATCH] D56011: [x86] lower extracted fadd/fsub to horizontal vector math

[Sanjay Patel via Phabricator via llvm-commits]

spatel reopened this revision.
spatel added a comment.
This revision is now accepted and ready to land.

Reopening - I reverted with rL350373 <https://reviews.llvm.org/rL350373>.
I didn't realize the custom legalization would affect the cost models used by the vectorizers; there are potentially IR test changes that go with this.


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  rL LLVM

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  https://reviews.llvm.org/D56011/new/

https://reviews.llvm.org/D56011