Request for reviews (XS): 6879362

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/6879362/webrev.00

Fixed 6879362: assert(!klass_is_exact(),"only non-exact klass")

Problem:
The AddP type could be not related to the type of
allocated object when CHA type is different from MDO type
on a dead path (for example, from instanceof check)
which is not collapsed during parsing.

Solution:
Do nothing for such AddP node and don't process its users
during escape analysis since this code branch will go away.

Reviewed by:

Fix verified (y/n): y, test

Other testing:
JPRT