Request for reviews (XS): 6676462: JVM sometimes would suddenly consume significant amount of memory

[Vladimir Kozlov]

http://webrev.invokedynamic.info/kvn/6676462/index.html

Fixed 6676462: JVM sometimes would suddenly consume significant amount of memory

Problem:
This is forward port to hs14 of the fix in 1.6 and 1.5 JDK.
Missing dead loop checks in AddNode::Ideal().

Solution:
Add missing dead loop checks.

Reviewed by:
Fix verified (y/n): y, tested with fix in 1.5.

Other testing:
JPRT


Note: I don't think it could happen in 1.6 and 7 jdk because
of the dead loops elimination changes in 1.6.
And all related bug reports filed for 1.5 jdk.
But changes are small and safe. So I am not against them.

Thanks,
Vladimir