[PATCH] [ARM64] Add diagnostics for bitfield extract/insert instructions

[Tim Northover]

Hi Bradley,

This looks reasonable to me, at least for now.

As you say, there might be better ways to handle the bitfield instructions overall. Though I'm still not convinced AArch64 has this one any better. There are lots of pseudo-instructions there, which amount to something not much better.

Any cunning ideas you have...

Tim.

http://reviews.llvm.org/D3702