[Bug c/110519] Optimize loop that only assigns to a local variable

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110519

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See bug 94392 comment #3 on why the general case does not apply to C and why we
decided not enable it when using the C front-end.