Request for reviews (S): 7026700: regression in 6u24-rev-b23: Crash in C2 compiler in PhaseIdealLoop::build_loop_late_post

[Vladimir Kozlov]

This is fix for jdk7.

http://cr.openjdk.java.net/~kvn/7026700/webrev

Fixed 7026700: regression in 6u24-rev-b23: Crash in C2 compiler in 
PhaseIdealLoop::build_loop_late_post

With EA memory slices should be created explicitly for non-static fields 
regardless the value of ReduceFieldZeroing flag. LoadNode::split_through_phi() 
should not check profitability since we want to eliminate loads from 
non-escaping allocations.
I also want to disable memory split verification code in EA until the fix for 
6984348. It produces false negative results since the verification code does not 
cover all cases.