[PATCH] 'CSE' of ADRP instructions used for load/store addressing

[Quentin Colombet]

  Hi Jianging,

  It looks to me that you have two change sets in the same patch:
  - One that adds the support of external linkage to the global merge pass.
  - One that enables the global merge pass for AArch64.

  Could you split the patch to match that?

  Thanks,
  -Quentin

http://reviews.llvm.org/D3223