[Bug middle-end/89977] missing -Wstringop-overflow with an out-of-bounds int128_t range

[JunMa at linux dot alibaba.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89977

--- Comment #3 from JunMa <JunMa at linux dot alibaba.com> ---
(In reply to JunMa from comment #2)
> After a bit more thinking, the behavior of gcc trunk is right. the range of
> n_3 in truncation from int128 to long unsigned int equal to the range of
> long unsigned int. for example: if n_3 = 0x100000000, then _1 is 0 which is
> less than 7.
> 
> so this is not a bug.

sorry, when n_3 = 0x1000 00000000 00000000, _1 is 0.