--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotReferenceMap.java	2017-02-15 16:55:54.615548183 -0800
@@ -0,0 +1,79 @@
+/*
+ * 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 jdk.vm.ci.hotspot;
+
+import java.util.Arrays;
+
+import jdk.vm.ci.code.Location;
+import jdk.vm.ci.code.ReferenceMap;
+
+/**
+ * Describes where the object references are in machine state, compliant with what HotSpot expects.
+ */
+public final class HotSpotReferenceMap extends ReferenceMap {
+
+    private final Location[] objects;
+    private final Location[] derivedBase;
+    private final int[] sizeInBytes;
+    private final int maxRegisterSize;
+
+    /**
+     *
+     * @param objects This array is now owned by this object and must not be mutated by the caller.
+     * @param derivedBase This array is now owned by this object and must not be mutated by the
+     *            caller.
+     * @param sizeInBytes This array is now owned by this object and must not be mutated by the
+     *            caller.
+     */
+    @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `objects`, `derivedBase` and `sizeInBytes`")
+    public HotSpotReferenceMap(Location[] objects, Location[] derivedBase, int[] sizeInBytes, int maxRegisterSize) {
+        this.objects = objects;
+        this.derivedBase = derivedBase;
+        this.sizeInBytes = sizeInBytes;
+        this.maxRegisterSize = maxRegisterSize;
+    }
+
+    @Override
+    public int hashCode() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof HotSpotReferenceMap) {
+            HotSpotReferenceMap that = (HotSpotReferenceMap) obj;
+            if (sizeInBytes == that.sizeInBytes && maxRegisterSize == that.maxRegisterSize && Arrays.equals(objects, that.objects) && Arrays.equals(derivedBase, that.derivedBase)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return Arrays.toString(objects);
+    }
+}