[Bug c/84121] optimizer breaks code without -frwapv, but -Wall -Wextra show no warnings

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84121

--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> It does:

Ah, of course, it prints it only for the first occurrence, and since this
quickly disappears, I missed it. My bad, thanks.