[Bug target/66930] [5 Regression]: gengtype.c is miscompiled during stage2

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66930

--- Comment #20 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Yes, fixed.  Although it probably could be reverted again because the actual
issue was in sh_find_set_of_reg and it has been extended.

I'll see if it's safe to revert it some time later.