RFR: Reuse MacroAssembler-CAS-Obj for C1. Plus some minor/cosmetic changes in cas-obj code

[Aleksey Shipilev]

On 10/06/2016 12:13 PM, Roman Kennke wrote:
> This makes C1 reuse the CAS-Obj impl of MacroAssembler.
> It also changes the cas-obj impl so that it uses movl for compressed
> oops, and use Assembler::equal instead of ::zero for the final set
> instruction, just to be consistent with the other comparisons in that
> code. Should be cosmetic afaict.
> 
> http://cr.openjdk.java.net/~rkennke/c1casobj/webrev.00/

Okay!

-Aleksey