[PATCH] AARCH64_BE load/store rules fix for ARM ABI

[Tim Northover]

  Hi Jiangning,

  I'm afraid I still can't quite see what you're proposing. First, are you sure you mean "alignment" in your post? If so, you seem to be advocating treating these two instructions differently:

       %val = load <4 x i16>* %addr, align 8 ; gets ldr
       %val = load <4 x i16>* %addr, align 2 ; gets ld1

  My opinion is that would be madness, and almost impossible to produce a consistent code from. I'll try to think up some examples if you like, but just want to make sure I understand what you're saying first.

  If that's not what you mean, could you give some IR examples and the code you'd like them to generate (particularly showing the distinctions)?

  Cheers.

  Tim.

http://llvm-reviews.chandlerc.com/D2884