[Bug target/59401] [SH] GBR addressing mode optimization produces wrong code

[kkojima at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59401

--- Comment #9 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
(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.