RFR (S) 8190891: Clean up G1 barrier code in compiler interface (ci)

[Erik Österlund]

Hi Coleen,

Looks fantastic.

Thanks,
/Erik

On 2017-11-08 01:38, coleen.phillimore at oracle.com wrote:
> Summary: consolidate gc barrier code in ci
>
> See bug and comments for more details.
>
> Tested with mach5 tier1-5 on linux x64 and iwndows x64.  Also tested 
> StressRedefineWithoutBytecodeModification in 
> test/jdk/java/lang/instrument which fails without the g1 barriers.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8190891.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8190891
>
> Thanks,
> Coleen