--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.code/src/jdk/vm/ci/code/ValueUtil.java	2017-02-15 16:55:33.397614998 -0800
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2012, 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.code;
+
+import jdk.vm.ci.meta.AllocatableValue;
+import jdk.vm.ci.meta.JavaConstant;
+import jdk.vm.ci.meta.JavaValue;
+import jdk.vm.ci.meta.PlatformKind;
+import jdk.vm.ci.meta.Value;
+
+/**
+ * Utility class for working with the {@link Value} class and its subclasses.
+ */
+public final class ValueUtil {
+
+    public static boolean isIllegal(Value value) {
+        assert value != null;
+        return Value.ILLEGAL.equals(value);
+    }
+
+    public static boolean isIllegalJavaValue(JavaValue value) {
+        assert value != null;
+        return Value.ILLEGAL.equals(value);
+    }
+
+    public static boolean isLegal(Value value) {
+        return !isIllegal(value);
+    }
+
+    public static boolean isVirtualObject(JavaValue value) {
+        assert value != null;
+        return value instanceof VirtualObject;
+    }
+
+    public static VirtualObject asVirtualObject(JavaValue value) {
+        assert value != null;
+        return (VirtualObject) value;
+    }
+
+    public static boolean isConstantJavaValue(JavaValue value) {
+        assert value != null;
+        return value instanceof JavaConstant;
+    }
+
+    public static JavaConstant asConstantJavaValue(JavaValue value) {
+        assert value != null;
+        return (JavaConstant) value;
+    }
+
+    public static boolean isAllocatableValue(Value value) {
+        assert value != null;
+        return value instanceof AllocatableValue;
+    }
+
+    public static AllocatableValue asAllocatableValue(Value value) {
+        assert value != null;
+        return (AllocatableValue) value;
+    }
+
+    public static boolean isStackSlot(Value value) {
+        assert value != null;
+        return value instanceof StackSlot;
+    }
+
+    public static StackSlot asStackSlot(Value value) {
+        assert value != null;
+        return (StackSlot) value;
+    }
+
+    public static boolean isRegister(Value value) {
+        assert value != null;
+        return value instanceof RegisterValue;
+    }
+
+    public static Register asRegister(Value value) {
+        return asRegisterValue(value).getRegister();
+    }
+
+    public static RegisterValue asRegisterValue(Value value) {
+        assert value != null;
+        return (RegisterValue) value;
+    }
+
+    public static Register asRegister(Value value, PlatformKind kind) {
+        if (value.getPlatformKind() != kind) {
+            throw new InternalError("needed: " + kind + " got: " + value.getPlatformKind());
+        } else {
+            return asRegister(value);
+        }
+    }
+}