--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/Value.java	Wed May 27 00:36:16 2015 +0200
@@ -0,0 +1,63 @@
+/*
+ * 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.jvmci.meta;
+
+/**
+ * Interface for values manipulated by the compiler. All values have a {@linkplain Kind kind} and
+ * are immutable.
+ */
+public interface Value extends KindProvider, TrustedInterface {
+
+    AllocatableValue ILLEGAL = new AllocatableValue(LIRKind.Illegal) {
+
+        @Override
+        public String toString() {
+            return "-";
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            // Due to de-serialization this object may exist multiple times. So we compare classes
+            // instead of the individual objects. (This anonymous class has always the same meaning)
+            return other != null && this.getClass() == other.getClass();
+        }
+    };
+
+    LIRKind getLIRKind();
+
+    /**
+     * Returns the platform specific kind used to store this value.
+     */
+    PlatformKind getPlatformKind();
+
+    /**
+     * Checks if this value is identical to {@code other}.
+     *
+     * Warning: Use with caution! Usually equivalence {@link #equals(Object)} is sufficient and
+     * should be used.
+     */
+    @ExcludeFromIdentityComparisonVerification
+    default boolean identityEquals(Value other) {
+        return this == other;
+    }
+}