[PATCH] [AArch64] Improve and enable the SeparateConstOffsetFromGEP for AArch64 backend.

[Hao Liu]

>>! In D5864#62, @Gerolf wrote:
> Hi Hao,
> 
> thanks for all your efforts landing this. We’ll check the performance impact on cyclone. Did lto have any impact on your results?
> 
> Cheers
> Gerolf
Hi Gerolf

I don't know the LTO impact. Actually I never tested on LTO and don't know how to test it. 
If you think LTO will be affected, I can have a try.

Thanks,
-Hao

http://reviews.llvm.org/D5864