--- Comment #7 from amker at gcc dot ---
(In reply to Jakub Jelinek from comment #6)
> So do you think combiner should throw away the REG_EQUAL note in that case,
> or something different?

It's invalid after transformation, so should be discarded in this case.  What I
am not sure is that how to tell invalid ones from all notes and keep others.  I
sent a proposed patch for discussion before


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