[Bug middle-end/121593] Miscompiles small function to produce endless(?) loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121593

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Now I wonder if there is some signed integer overflow going on.