[Bug target/67317] [x86] Silly code generation for _addcarry_u32/_addcarry_u64

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67317

--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Segher Boessenkool from comment #3)

> Does this need to be an unspec at all?

Of course not. We are looking to replace unspecs with standard RTXes. Do you
have any recommendation on how we can represent this carry-setting insn to
satisfy combine?