[Bug target/68261] GCC needs to use optimized version of memcpy

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68261

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Geir Johansen from comment #4)
> (In reply to Andrew Pinski from comment #1)
> > Note glibc does provide a memcpy which is optimized for each target via
> > ifuncs. What version of glibc are you running.
> 
> 2.11.3

That is a very old release which was released before most of the modern v2/v3
were relased so no wonder you are having performance issues.