--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/PiArrayNode.java	2016-12-09 00:55:06.641182377 -0800
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2012, 2012, 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 org.graalvm.compiler.core.common.type.Stamp;
+import org.graalvm.compiler.graph.Node;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.graph.spi.CanonicalizerTool;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.java.ArrayLengthNode;
+import org.graalvm.compiler.nodes.spi.ArrayLengthProvider;
+import org.graalvm.compiler.nodes.util.GraphUtil;
+
+/**
+ * A {@link PiNode} that also provides an array length in addition to a more refined stamp. A usage
+ * that reads the array length, such as an {@link ArrayLengthNode}, can be canonicalized based on
+ * this information.
+ */
+@NodeInfo
+public final class PiArrayNode extends PiNode implements ArrayLengthProvider {
+
+    public static final NodeClass<PiArrayNode> TYPE = NodeClass.create(PiArrayNode.class);
+    @Input ValueNode length;
+
+    @Override
+    public ValueNode length() {
+        return length;
+    }
+
+    public PiArrayNode(ValueNode object, ValueNode length, Stamp stamp) {
+        super(TYPE, object, stamp, null);
+        this.length = length;
+    }
+
+    @Override
+    public Node canonical(CanonicalizerTool tool) {
+        if (GraphUtil.arrayLength(object()) != length()) {
+            return this;
+        }
+        return super.canonical(tool);
+    }
+
+    @NodeIntrinsic
+    public static native Object piArrayCast(Object object, int length, @ConstantNodeParameter Stamp stamp);
+}