https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65120
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> --- It was just noted that "But then again (!a == 0) is the same as !(a == 0), so the warning is pretty pointless when the right side is constant zero." so we should probably not warn for this case either.
