https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59401
--- Comment #11 from Oleg Endo <olegendo at gcc dot gnu.org> --- Created attachment 33723 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33723&action=edit Make GBR call preserved by default (In reply to Oleg Endo from comment #10) > (In reply to Kazumoto Kojima from comment #9) > > (In reply to Oleg Endo from comment #8) > > > change the > > > value for gbr in sh.h CALL_USED_REGISTERS from '1' to '0' and confirm that > > > everything is still OK? > > > > The comment and document about CALL_USED_REGISTERS say that it must be > > a superset of FIXED_REGISTERS. CALL_REALLY_USED_REGISTERS might be > > a macro for that purpose. > > Right. In this case it's probably better to do it in > sh_conditional_register_usage. It would be nice if '-fcall-saved-gbr' and > '-fcall-used-gbr' still remained functional afterwards ... I'll give it a > try. sh_conditional_register_usage is invoked after the -fcall-*-* options are processed. Defining the CALL_REALLY_USED_REGISTERS macro with the default values works as expected, i.e. -fcall-used-gbr still works. Kaz, could you please add the attached patch to your test run?
