https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70495
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-01
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> b+b has type int
But even b+b+b can never be negative (which is the case where the warning is
interesting).