[PATCH] D30865: [AVX-512] If gather mask is all ones, use UNDEF for the source
Igor Breger via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Mar 13 00:16:48 PDT 2017
igorb added a comment.
In https://reviews.llvm.org/D30865#698889, @craig.topper wrote:
> I wonder if we shouldn't keep zeroes to break execution dependency. I don't think the existing undef handling in ExeDependencyFix can handle the early clobber.
May be it is also profitable to zero src in case mask is all ones ?
https://reviews.llvm.org/D30865
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