RFR: new API points in gc interface for acmp

[Aleksey Shipilev]

On 08/22/2018 05:45 PM, Roland Westrelin wrote:
> 
>> This looks good to me. There are no changes in the body of the moved method
>> (ShenandoahBarrierNode::do_cmpp_if), right?
> 
> No, no change.

Looks good then.

-Aleksey