https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212
--- Comment #27 from Kazumoto Kojima <kkojima at gcc dot gnu.org> --- Created attachment 33526 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33526&action=edit A trial patch It disables equiv substitution when the equiv includes some reg assigned to a small register class. I hope that it makes the issue a bit clearer, even if it doesn't the right thing.
