http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59934
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> --- But with the second patch we'll generate bigger code (because we pass arguments to fancy_abort) and it really is a will never happen case, if you don't have any partial (or vector) modes, then no mode will have MODE_PARTIAL_INT (or MODE_VECTOR_INT) class. Plus, with --disable-checking we'll trigger the warning again.