[PATCH] [ARM64/AArch64] Port NEON post-increment load/store with 2/3/4 vectors to ARM64 backend

[Hao Liu]

Hi Tim,

This patch has been refactored according your comments and has been committed in http://llvm.org/viewvc/llvm-project?view=revision&revision=208284.

Thanks,
-Hao

http://reviews.llvm.org/D3605