On Tue, 22 Oct 2024, Dave Hansen wrote:

> So I think Peter's version was the best.  It shuts up clang and also
> preserves the existing (good) gcc 'sub' behavior.  I'll send it out for
> real in a bit, but I'm thinking of something like the attached patch.

The desired behavior is a "dec". "sub" has a longer op code AFAICT.