[Bug tree-optimization/120265] Optimize modular counters

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120265

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is basically what PR 20231 is asking for with a non-constant value
even :).