[PATCH] Add AArch32 DCPS{1,2,3} and HLT instructions

[Tim Northover]

Hi Rich,

> The attached patch adds ARMv8 AArch32 DCPS and HLT instructions to the
> backend.

The code changes look OK. These are special instructions (they need to
be insertable absolutely anywhere to be fully useful, hence the weird
predication rules and the allocation of quite a chunk of 16-bit Thumb
space I suspect), so the AsmParser hack isn't unduly worrying.

One question on the tests:

+0x01 0x80 0x8f 0xf7
+# CHECK dcps1

Doesn't FileCheck need a colon to spot a CHECK line?

Cheers.

Tim.