[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 #7 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #6)
> Kaz, what's your opinion on making GBR to be call preserved by default?

Looks OK to me for 5.0.  It's clearly an ABI change but a change to
the more robust direction and wouldn't be surprising to users.