--- /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/extended/LoadHubOrNullNode.java	Tue Sep 24 12:47:15 2019 -0400
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2011, 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.extended;
+
+import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
+
+import org.graalvm.compiler.core.common.type.AbstractPointerStamp;
+import org.graalvm.compiler.core.common.type.ObjectStamp;
+import org.graalvm.compiler.core.common.type.Stamp;
+import org.graalvm.compiler.core.common.type.TypeReference;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.graph.spi.Canonicalizable;
+import org.graalvm.compiler.graph.spi.CanonicalizerTool;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.ConstantNode;
+import org.graalvm.compiler.nodes.NodeView;
+import org.graalvm.compiler.nodes.ValueNode;
+import org.graalvm.compiler.nodes.calc.FloatingNode;
+import org.graalvm.compiler.nodes.spi.Lowerable;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.nodes.spi.StampProvider;
+import org.graalvm.compiler.nodes.spi.Virtualizable;
+import org.graalvm.compiler.nodes.spi.VirtualizerTool;
+import org.graalvm.compiler.nodes.type.StampTool;
+
+import jdk.vm.ci.meta.ConstantReflectionProvider;
+import jdk.vm.ci.meta.MetaAccessProvider;
+
+/**
+ * Loads an object's hub, or null if the object is null.
+ */
+@NodeInfo(cycles = CYCLES_2, size = SIZE_1)
+public final class LoadHubOrNullNode extends FloatingNode implements Lowerable, Canonicalizable, Virtualizable {
+
+    public static final NodeClass<LoadHubOrNullNode> TYPE = NodeClass.create(LoadHubOrNullNode.class);
+    @Input ValueNode value;
+
+    public ValueNode getValue() {
+        return value;
+    }
+
+    private static AbstractPointerStamp hubStamp(StampProvider stampProvider, ValueNode value) {
+        assert value.stamp(NodeView.DEFAULT) instanceof ObjectStamp;
+        return stampProvider.createHubStamp(((ObjectStamp) value.stamp(NodeView.DEFAULT))).asMaybeNull();
+    }
+
+    public static ValueNode create(ValueNode value, StampProvider stampProvider, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) {
+        AbstractPointerStamp stamp = hubStamp(stampProvider, value);
+        return create(value, stamp, metaAccess, constantReflection);
+    }
+
+    public static ValueNode create(ValueNode value, AbstractPointerStamp stamp, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) {
+        ValueNode synonym = findSynonym(value, stamp, metaAccess, constantReflection);
+        if (synonym != null) {
+            return synonym;
+        }
+        return new LoadHubOrNullNode(stamp, value);
+    }
+
+    public LoadHubOrNullNode(@InjectedNodeParameter StampProvider stampProvider, ValueNode value) {
+        this(hubStamp(stampProvider, value), value);
+    }
+
+    public LoadHubOrNullNode(Stamp stamp, ValueNode value) {
+        super(TYPE, stamp);
+        this.value = value;
+    }
+
+    @Override
+    public void lower(LoweringTool tool) {
+        tool.getLowerer().lower(this, tool);
+    }
+
+    @Override
+    public ValueNode canonical(CanonicalizerTool tool) {
+        if (!GeneratePIC.getValue(tool.getOptions())) {
+            NodeView view = NodeView.from(tool);
+            MetaAccessProvider metaAccess = tool.getMetaAccess();
+            ValueNode curValue = getValue();
+            ValueNode newNode = findSynonym(curValue, (AbstractPointerStamp) stamp(view), metaAccess, tool.getConstantReflection());
+            if (newNode != null) {
+                return newNode;
+            }
+        }
+        return this;
+    }
+
+    public static ValueNode findSynonym(ValueNode curValue, AbstractPointerStamp stamp, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) {
+        if (StampTool.isPointerNonNull(stamp)) {
+            return LoadHubNode.create(curValue, stamp.asNonNull(), metaAccess, constantReflection);
+        }
+        return null;
+    }
+
+    @Override
+    public void virtualize(VirtualizerTool tool) {
+        if (!GeneratePIC.getValue(tool.getOptions())) {
+            ValueNode alias = tool.getAlias(getValue());
+            TypeReference type = StampTool.typeReferenceOrNull(alias);
+            if (type != null && type.isExact()) {
+                tool.replaceWithValue(ConstantNode.forConstant(stamp(NodeView.DEFAULT), tool.getConstantReflection().asObjectHub(type.getType()), tool.getMetaAccess(), graph()));
+            }
+        }
+    }
+}