[PATCH] D31156: [x86] use PMOVMSK for vector-sized equality comparisons

[Sanjay Patel via Phabricator via llvm-commits]

spatel created this revision.
Herald added a subscriber: mcrosier.

We could do better by splitting any oversized type into whatever vector size the target supports, but I left that for future work if it ever comes up. The motivating case is memcmp() calls on 16-byte structs, so I think we can wire that up with a TLI hook that feeds into this.


https://reviews.llvm.org/D31156

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/setcc-wide-types.ll

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