[9] RFR (XS): 8087218: Constant fold loads from final instance fields in VM anonymous classes

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8087218/webrev.00
https://bugs.openjdk.java.net/browse/JDK-8087218

Right now, VM doesn't constant fold loads final instance fields unless 
an experimental flag -XX:+TrustFinalNonStaticFields is turned on.
The only exception is classes in java.lang.invoke/sun.invoke packages.
It can be extended to VM anonymous classes because there is no hacking 
of finals going on with them:
   (1) they are part of private API (sun.misc.Unsafe);
   (2) they can't be serialized.

Testing: manual (verified in generated code that constant folding happens)

Thanks!

Best regards,
Vladimir Ivanov