[Bug c++/89056] Optimizer generates bad code for non-void function that fails to return a value

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89056

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You can use -fsanatizer=undefined to find this behavior at runtime.