[PATCH] D61189: [X86][SSE] Extract i1 elements from vXi1 bool vectors

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 197084.
RKSimon added a comment.

Updated version, which actually looks pretty similar to D59669 <https://reviews.llvm.org/D59669>.....

I'm performing all the extractions at the same time and only combining if (a) there are only extractions using the source vector and (b) there's more than 1 extract (I'd like to remove this limitation in the future).

The big difference is D59669 <https://reviews.llvm.org/D59669> tries to limit to setcc usage only, which with our new SimplifyDemandedBits support is probably unnecessary.

@spatel How do you want to proceed with this + D59669 <https://reviews.llvm.org/D59669>?


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D61189/new/

https://reviews.llvm.org/D61189

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/bitcast-vector-bool.ll
  test/CodeGen/X86/bool-vector.ll
  test/CodeGen/X86/movmsk-cmp.ll

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