Request for reviews (S): 6832293: JIT compiler got wrong result in type checking with -server

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/6832293/webrev.00

Fixed 6832293: JIT compiler got wrong result in type checking with -server

Problem:
The code in CmpPNode::sub is broken for arrays of interface types.

Solution:
In CmpPNode::sub compare klasses of obj arrays elements..

Reviewed by:

Fix verified (y/n): y, modified (for jdk7) bug's test

Other testing:
JPRT