[Bug target/66358] [5/6 Regression] [SH] ICE: in extract_constrain_insn, at recog.c:2232

[kkojima at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66358

--- Comment #7 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #6)
> There could be some negative side effects with the patch above, because it
> forces the R0 usage quite early (at RTL expansion).

Yes, the comment part says it and it was discussed in #c83
and #c82 of PR55212.  This patch will be a 'micro-degradation',
though it wins CSiBE for the code size at least, even without LRA.

> I'd like to give the RTL pass a try, although it's probably even more
> invasive than the patch above.

It sounds better and OK for trunk.  Also yes, it looks too invasive
for the release branch.