--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/MemoryProxyNode.java	Thu Oct 31 16:54:16 2019 -0700
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2019, 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.StampFactory;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.nodeinfo.InputType;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.memory.MemoryNode;
+import org.graalvm.compiler.nodes.memory.MemoryPhiNode;
+import jdk.internal.vm.compiler.word.LocationIdentity;
+
+@NodeInfo(allowedUsageTypes = {InputType.Memory}, nameTemplate = "MemoryProxy({i#value})")
+public final class MemoryProxyNode extends ProxyNode implements MemoryNode {
+
+    public static final NodeClass<MemoryProxyNode> TYPE = NodeClass.create(MemoryProxyNode.class);
+    @OptionalInput(InputType.Memory) MemoryNode value;
+    protected final LocationIdentity locationIdentity;
+
+    public MemoryProxyNode(MemoryNode value, LoopExitNode proxyPoint, LocationIdentity locationIdentity) {
+        super(TYPE, StampFactory.forVoid(), proxyPoint);
+        this.value = value;
+        this.locationIdentity = locationIdentity;
+    }
+
+    public void setValue(MemoryNode newValue) {
+        this.updateUsages(value.asNode(), newValue.asNode());
+        this.value = newValue;
+    }
+
+    @Override
+    public ValueNode value() {
+        return (value == null ? null : value.asNode());
+    }
+
+    @Override
+    public PhiNode createPhi(AbstractMergeNode merge) {
+        return graph().addWithoutUnique(new MemoryPhiNode(merge, locationIdentity));
+    }
+}