https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121383

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
if-conversion does nothing to loops with multiple exits.  One could think to
sub-divide its work, but in this case there's a lack of PHIs and the expected
if-conversion is on control dependences rather than data dependences.

I would rather see this as an opportunity to look how to handle such cases
in the vectorizer itself?

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