[Bug middle-end/80346] pessimistic stringop-overflow

[bonzini at gnu dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80346

--- Comment #12 from Paolo Bonzini <bonzini at gnu dot org> ---
> So AFAICT, the warning for the first testcase is valid as well.

True, but isn't the maximum object size (2^63-1 aka PTRDIFF_MAX) as bogus as
2^64-1?  We are using -1 which is a bit ugly but SIZE_MAX would also warn and
the warning then makes less sense.

In other words, I'm not sure it's particularly useful to have a warning if GCC
cannot determine the object size at all.