[Bug c/70308] memset generates rep stosl instead of rep stosq

[socketpair at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70308

--- Comment #2 from Коренберг Марк <socketpair at gmail dot com> ---
Please read carefully. All conditions are the same, except different branching.
So, gcc choose "rep stosl" by unknown cause.