[Bug middle-end/78115] Missed optimization for "int modulo 2^31"

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78115

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What this needs above and beyond PR 103216 is supporting `x ? a - b : a`.