--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotObjectConstantImpl.java	Wed Nov 05 21:07:59 2014 +0100
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2009, 2014, 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 com.oracle.graal.hotspot.meta;
+
+import com.oracle.graal.api.meta.*;
+
+/**
+ * Represents a constant non-{@code null} object reference, within the compiler and across the
+ * compiler/runtime interface.
+ */
+public final class HotSpotObjectConstantImpl extends JavaConstant implements HotSpotObjectConstant {
+
+    private static final long serialVersionUID = 3592151693708093496L;
+
+    public static JavaConstant forObject(Object object) {
+        if (object == null) {
+            return JavaConstant.NULL_OBJECT;
+        } else {
+            return new HotSpotObjectConstantImpl(object, false);
+        }
+    }
+
+    public static JavaConstant forBoxedValue(Kind kind, Object value) {
+        if (kind == Kind.Object) {
+            return HotSpotObjectConstantImpl.forObject(value);
+        } else {
+            return JavaConstant.forBoxedPrimitive(value);
+        }
+    }
+
+    public static Object asObject(Constant constant) {
+        if (JavaConstant.isNull(constant)) {
+            return null;
+        } else {
+            return ((HotSpotObjectConstantImpl) constant).object;
+        }
+    }
+
+    public static Object asBoxedValue(Constant constant) {
+        if (JavaConstant.isNull(constant)) {
+            return null;
+        } else if (constant instanceof HotSpotObjectConstantImpl) {
+            return ((HotSpotObjectConstantImpl) constant).object;
+        } else {
+            return ((JavaConstant) constant).asBoxedPrimitive();
+        }
+    }
+
+    public static boolean isCompressed(Constant constant) {
+        if (JavaConstant.isNull(constant)) {
+            return HotSpotCompressedNullConstant.NULL_OBJECT.equals(constant);
+        } else {
+            return ((HotSpotObjectConstantImpl) constant).compressed;
+        }
+    }
+
+    private final Object object;
+    private final boolean compressed;
+
+    private HotSpotObjectConstantImpl(Object object, boolean compressed) {
+        super(LIRKind.reference(compressed ? Kind.Int : Kind.Object));
+        this.object = object;
+        this.compressed = compressed;
+        assert object != null;
+    }
+
+    public JavaConstant compress() {
+        assert !compressed;
+        return new HotSpotObjectConstantImpl(object, true);
+    }
+
+    public JavaConstant uncompress() {
+        assert compressed;
+        return new HotSpotObjectConstantImpl(object, false);
+    }
+
+    @Override
+    public boolean isNull() {
+        return false;
+    }
+
+    @Override
+    public boolean isDefaultForKind() {
+        return false;
+    }
+
+    @Override
+    public Object asBoxedPrimitive() {
+        throw new IllegalArgumentException();
+    }
+
+    @Override
+    public int asInt() {
+        throw new IllegalArgumentException();
+    }
+
+    @Override
+    public boolean asBoolean() {
+        throw new IllegalArgumentException();
+    }
+
+    @Override
+    public long asLong() {
+        throw new IllegalArgumentException();
+    }
+
+    @Override
+    public float asFloat() {
+        throw new IllegalArgumentException();
+    }
+
+    @Override
+    public double asDouble() {
+        throw new IllegalArgumentException();
+    }
+
+    @Override
+    public int hashCode() {
+        return System.identityHashCode(object);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        return o == this || (o instanceof HotSpotObjectConstantImpl && super.equals(o) && object == ((HotSpotObjectConstantImpl) o).object);
+    }
+
+    @Override
+    public String toValueString() {
+        if (object instanceof String) {
+            return (String) object;
+        } else {
+            return Kind.Object.format(object);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return (compressed ? "NarrowOop" : getKind().getJavaName()) + "[" + Kind.Object.format(object) + "]";
+    }
+}