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

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 179860.
spatel marked 3 inline comments as done.
spatel added a comment.

Patch updated:

1. Ease extra uses constraint - we might still be able to avoid a shuffle/extract.
2. Allow 512-bit vectors.
3. Add TODO to for other extract index pairs.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56011/new/

https://reviews.llvm.org/D56011

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/haddsub-undef.ll
  test/CodeGen/X86/haddsub.ll

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