[Bug c/124223] Cast (int32_t)0x80000000 causes the whole loop to be optimized away

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124223

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why aren't you just doing arithmetic on the unsigned types?

        int32_t diff = values[i] - 0x80000000;