[PATCH] D31290: [x86] use PMOVMSK to replace memcmp libcalls for 16-byte equality

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 92974.
spatel added a comment.

Patch updated:
Check all of the 16-byte simple value types before giving up.

Eli pointed me to https://reviews.llvm.org/D28637 (which I hadn't seen of course!) - a general solution for memcmp transformation. Not sure if this specialization still makes sense given that patch, but since I already made the edits, I'll post it.


https://reviews.llvm.org/D31290

Files:
  include/llvm/Target/TargetLowering.h
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  test/CodeGen/X86/memcmp.ll

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