[Bug tree-optimization/93359] Miscompile (loop check omitted) in function with missing return statement

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93359

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In c++, it is undefined behavior if you fall through to the end of a function
without a return if the type is non void.