--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/ValuePhiNode.java	2017-02-15 17:06:54.246315833 -0800
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.graalvm.compiler.nodes;
+
+import java.util.stream.Collectors;
+
+import org.graalvm.compiler.core.common.type.Stamp;
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.graph.NodeInputList;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.spi.ArrayLengthProvider;
+import org.graalvm.compiler.nodes.type.StampTool;
+import org.graalvm.compiler.nodes.util.GraphUtil;
+
+/**
+ * Value {@link PhiNode}s merge data flow values at control flow merges.
+ */
+@NodeInfo(nameTemplate = "Phi({i#values})")
+public class ValuePhiNode extends PhiNode implements ArrayLengthProvider {
+
+    public static final NodeClass<ValuePhiNode> TYPE = NodeClass.create(ValuePhiNode.class);
+    @Input protected NodeInputList<ValueNode> values;
+
+    public ValuePhiNode(Stamp stamp, AbstractMergeNode merge) {
+        this(TYPE, stamp, merge);
+    }
+
+    protected ValuePhiNode(NodeClass<? extends ValuePhiNode> c, Stamp stamp, AbstractMergeNode merge) {
+        super(c, stamp, merge);
+        assert stamp != StampFactory.forVoid();
+        values = new NodeInputList<>(this);
+    }
+
+    public ValuePhiNode(Stamp stamp, AbstractMergeNode merge, ValueNode[] values) {
+        super(TYPE, stamp, merge);
+        assert stamp != StampFactory.forVoid();
+        this.values = new NodeInputList<>(this, values);
+    }
+
+    @Override
+    public NodeInputList<ValueNode> values() {
+        return values;
+    }
+
+    @Override
+    public boolean inferStamp() {
+        /*
+         * Meet all the values feeding this Phi but don't use the stamp of this Phi since that's
+         * what's being computed.
+         */
+        Stamp valuesStamp = StampTool.meetOrNull(values(), this);
+        if (valuesStamp == null) {
+            valuesStamp = stamp;
+        } else if (stamp.isCompatible(valuesStamp)) {
+            valuesStamp = stamp.join(valuesStamp);
+        }
+        return updateStamp(valuesStamp);
+    }
+
+    @Override
+    public ValueNode length() {
+        if (merge() instanceof LoopBeginNode) {
+            return null;
+        }
+        ValueNode length = null;
+        for (ValueNode input : values()) {
+            ValueNode l = GraphUtil.arrayLength(input);
+            if (l == null) {
+                return null;
+            }
+            if (length == null) {
+                length = l;
+            } else if (length != l) {
+                return null;
+            }
+        }
+        return length;
+    }
+
+    @Override
+    public boolean verify() {
+        Stamp s = null;
+        for (ValueNode input : values()) {
+            if (s == null) {
+                s = input.stamp();
+            } else {
+                if (!s.isCompatible(input.stamp())) {
+                    fail("Phi Input Stamps are not compatible. Phi:%s inputs:%s", this, values().stream().map(x -> x.toString() + ":" + x.stamp()).collect(Collectors.joining(", ")));
+                }
+            }
+        }
+        return super.verify();
+    }
+}