[PATCH] D31290: [x86] use PMOVMSK to replace memcmp libcalls for 16-byte equality
Sanjay Patel via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Mar 24 10:49:22 PDT 2017
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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