--- /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/DynamicPiNode.java	2017-02-15 17:06:36.523540543 -0800
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2016, 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.core.common.type.StampFactory;
+import org.graalvm.compiler.core.common.type.TypeReference;
+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.extended.GuardingNode;
+
+import jdk.vm.ci.meta.ResolvedJavaType;
+
+/**
+ * A {@link PiNode} where the type is not yet known. If the type becomes known at a later point in
+ * the compilation, this can canonicalize to a regular {@link PiNode}.
+ */
+@NodeInfo
+public final class DynamicPiNode extends PiNode {
+
+    public static final NodeClass<DynamicPiNode> TYPE = NodeClass.create(DynamicPiNode.class);
+    @Input ValueNode typeMirror;
+
+    public DynamicPiNode(ValueNode object, GuardingNode guard, ValueNode typeMirror) {
+        super(TYPE, object, StampFactory.object(), guard);
+        this.typeMirror = typeMirror;
+    }
+
+    @Override
+    public Node canonical(CanonicalizerTool tool) {
+        if (typeMirror.isConstant()) {
+            ResolvedJavaType t = tool.getConstantReflection().asJavaType(typeMirror.asConstant());
+            if (t != null) {
+                Stamp staticPiStamp;
+                if (t.isPrimitive()) {
+                    staticPiStamp = StampFactory.alwaysNull();
+                } else {
+                    TypeReference type = TypeReference.createTrusted(tool.getAssumptions(), t);
+                    staticPiStamp = StampFactory.object(type);
+                }
+
+                return new PiNode(object(), staticPiStamp, (ValueNode) getGuard()).canonical(tool);
+            }
+        }
+
+        return this;
+    }
+}