Request for reviews (S): 6865031: Application gives bad result (throws bad exception) with compressed oops

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/6865031/webrev.00

Fixed 6865031: Application gives bad result (throws bad exception) with compressed oops

Problem:
The problem at the same place as in 6851282.
The new Phi narrow type is incorrect since it is based
on the type of one of inputs which could be subtype of
the original Phi's type. The Phi is used in CmpP node
which gives a wrong result since Phi's type is wrong.
It leads to incorrect graph and generated code.

Solution:
Produce narrow type for new Phi from the original type
instead of using a type of Phi's input.

Reviewed by:

Fix verified (y/n): y, bug's test and 6851282 test

Other testing:
JPRT, CTW with +UseCompressedOops