[Bug middle-end/101913] -Wstrict-overflow -O3 false alarm on tzdb localtime.c

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101913

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>-1L << 63 is LONG_MIN
No it is undefined and has an overflow bit on it.
You want (long)(-1UL << 63) for it be correct.
But the warning is still there.

I thought -fsanitize=undefined enabled -fwrapv too ...