[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 #10 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #8)
> Ah, right.  If it fixes the problem, then I think it's the only option we
> have for the release branch.

It can be used as a last resort.  It depends on whether various rtl
passes take care of hard registers or not.
I'd like to wait your pre-allocating pass.  It's surely cleaner than
that a bit unreliable artifact in prepare_move_operands.  Perhaps
both can be almost equaly invasive to the release branch.  If the pass
is enough simple and can give good results, it may be a safer bet,
especially when we are in transition to LRA.