Request for reviews (S): 7154997: assert(false) failed: not G1 barrier raw StoreP

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/7154997/webrev

7154997: assert(false) failed: not G1 barrier raw StoreP

In 7147744 changes I added asserts to identify G1 and unsafe cases. In previous 
version of this code these cases were ignored. In new version I want to skip 
only G1 cases and explicitly set global escape state in unsafe cases.

Thanks,
Vladimir