[PATCH] D67875: [X86] X86DAGToDAGISel::matchBEXTRFromAndImm(): if can't use BEXTR, fallback to BZHI (PR43381)
Craig Topper via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun Sep 22 13:07:22 PDT 2019
craig.topper added a comment.
What if we just do the larger than 32-bit mask? Its not clear that making BZHI just to fold a load is an improvement. You have to materialize an immediate instead so the total uops increased.
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https://reviews.llvm.org/D67875
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