hg: graal/graal-compiler: GraphPE: keep state of MergeNode when creating LoopBeginNode

[doug.simon at oracle.com]

Changeset: b2223a89bd22
Author:    Christian Wimmer <christian.wimmer at oracle.com>
Date:      2016-01-20 10:54 -0800
URL:       http://hg.openjdk.java.net/graal/graal-compiler/rev/b2223a89bd22

GraphPE: keep state of MergeNode when creating LoopBeginNode

! graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GraphDecoder.java