[PATCH] D125671: [InstCombine] Allow undef vectors when foldSelectToCopysign

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

This does not look correct.

In the example test, if both elements of X are negative, we should return <-42.0, -42.0>. But after this transform, we will return <-42.0, undef>?


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