Split com.oracle.graal.loop in 2 parts, Make LoopPolicies extensible Moved the phases out of com.oracle.graal.loop into com.oracle.graal.loop.phases. Made LoopPolicies an interface with a default implementation. Pass a LoopPolicies instance to the different loop phases constructors. Add abstract classes for loop phases to hold onto the loop polcies.

Please see http://openjdk.java.net/contribute/ for details of how to contribute
to OpenJDK projects including GraalVM.