RFR: 8156835: [JVMCI] clean up and minimize JVMCI

[Doug Simon]

> On 13 May 2016, at 18:21, Igor Veresov <igor.veresov at oracle.com> wrote:
> 
> Looks ok

Thanks for the review.

-Doug

>> On May 13, 2016, at 4:40 AM, Doug Simon <doug.simon at oracle.com> wrote:
>> 
>> Please review this RFE that makes minor changes to clean up and minimize JVMCI.
>> 
>> All jtreg tests pass as do all Graal tests.
>> 
>> https://bugs.openjdk.java.net/browse/JDK-8156835
>> http://cr.openjdk.java.net/~dnsimon/8156835
>> 
>> -Doug
>