RFR (11): Cleaner separation between Shenandoah and other GCs in C1's compare-and-swap generation

[Roman Kennke]

> On 5/29/19 3:21 PM, Roman Kennke wrote:
>> http://cr.openjdk.java.net/~rkennke/jdk11-better-c1-cas-regalloc/webrev.00/
> 
> Right on.
> 
> I think we should #include "utilities/macros.hpp" to gain access to INCLUDE_SHENANDOAHGC without
> precompiled headers.

Right.

http://cr.openjdk.java.net/~rkennke/jdk11-better-c1-cas-regalloc/webrev.01/

Good?

Roman