[Bug target/118678] Dubious optimization when compiling with -fpie -Os

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118678

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> `rep movsl` is smaller than `rep movsq`.

because movsq requires an extra prefix.

So this is definitely smaller.