[PATCH] [AArch64] Inline memcpy() as a sequence of ldp-stp with 64-bit registers

[Sergey Dmitrouk]

Tim, James,

I've updated the diff, but I'll also ask Andy Trick and/or Dave Estes if there
is a better way that involves instruction scheduler using this review as an
example of what I want to achieve.

Cheers,
Sergey

http://reviews.llvm.org/D6054