[Bug c/91232] Adding -fPIC with optimization level > 0 resulting a busy hang in my program

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91232

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>Can I please have any pointers which could explain why that particular 
>computation is invoking an undefined behaviour ?

Signed integer overflow.