[PATCH] D33311: [X86] Match bitcast of vsetcc to pmovmsk

[Zvi Rackover via Phabricator via llvm-commits]

zvi created this revision.

Add an early combine to match patterns such as:

  (i16 bitcast (v16i1 setcc v16i8 v1, v2, gt))
  ->
  (movmsk (v16i8 setcc v16i8 v1, v2, gt))

This combine needs to happen early enough before
type-legalization scalarizes the result of the setcc.


https://reviews.llvm.org/D33311

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/bitcast-setcc-128.ll
  test/CodeGen/X86/bitcast-setcc-256.ll

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