[Bug c/103103] Incorrect integer optimization omits x < 0 comparison

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103103

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also you can detect this at runtime with -fsanitize=undefined.