[PATCH] D117912: [IR] document and update ctlz/cttz intrinsics to optionally return poison rather than undef

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

Thanks, @zielaj for explaining the larger example. It's not clear to me exactly what clang/LLVM can do to improve that case, but if you have a suggestion, please do file another issue.


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