review(XS) 7032696: Fix for 7029152 broke VM

[Vladimir Kozlov]

I updated webrev. As John pointed me, Ideal() should return 'this' when memory 
is updated. I also added a band-aid for one iteration loops problem which causes 
the second failure in the bug report. I have RFE 7004555 to fix it.

Vladimir

Vladimir Kozlov wrote:
> http://cr.openjdk.java.net/~kvn/7032696/webrev
> 
> Fixed: 7032696: Fix for 7029152 broke VM
> 
> StrIntrinsicNode::Ideal() should not optimize memory during Parse.
> 
> Tested with full CTW.