RFR: 8217257: ZGC: Minor cleanup of ZBarrierSetC2

[Stefan Karlsson]

Hi Per,

On 2019-01-16 15:59, Per Liden wrote:
> Minor style/cosmetic cleanups of ZBarrierSetC2.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8217257
> Webrev: http://cr.openjdk.java.net/~pliden/8217257/webrev.0

This change contains cleanups and they look good. However, the patch 
also contains a bug fix in ZBarrierSetC2::escape_add_final_edges (a 
missing break causing a fall-through in the switch statement), and I'd 
like to see that getting fixed as a separate changeset.

Thanks,
StefanK

> 
> /Per