[Bug target/65456] powerpc64le autovectorized copy loop missed optimization

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65456

--- Comment #16 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Proposed patch added to the general P8 unaligned vector patch:

https://gcc.gnu.org/ml/gcc-patches/2015-03/msg01502.html