https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78365
--- Comment #6 from kugan at gcc dot gnu.org --- (In reply to Richard Biener from comment #5) > IPA has to deal with argument mismatches (I think I've said this elsewhere). As I understand, this is along what you found earlier but a different issue. I posted a patch at https://gcc.gnu.org/ml/gcc-patches/2016-11/msg01878.html for review.