[PATCH] D80658: [InstCombine] enhance vector demanded elements for select condition operand

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

I'm concerned that in some cases, the condition might be "demanded" due to poison rules, even if we don't actually care about the value.  See, for example, http://volta.cs.utah.edu:8080/z/YDSX7k


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https://reviews.llvm.org/D80658