[PATCH] D42985: [DAGCombiner][AMDGPU][X86] Turn cttz/ctlz into cttz_zero_undef/ctlz_zero_undef if we can prove the input is never zero

Matt Arsenault via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Tue Feb 6 14:29:12 PST 2018

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arsenm accepted this revision.
arsenm added a comment.
This revision is now accepted and ready to land.

LGTM


https://reviews.llvm.org/D42985

Previous message: [PATCH] D42985: [DAGCombiner][AMDGPU][X86] Turn cttz/ctlz into cttz_zero_undef/ctlz_zero_undef if we can prove the input is never zero
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