[Bug target/67391] [SH] Convert clrt addc to normal add insn

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67391

--- Comment #26 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Kazumoto Kojima from comment #25)

> Yes, 36400 fixes that failure:
> PASS: gcc.c-torture/compile/sync-3.c   -O1   (test for warnings, line )

OK, I'll commit attachment 36400 to trunk then.  Do you think it's safe for GCC
5 branch, too?  Or shall we test it on the branch?