--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.cri/src/com/sun/cri/xir/XirArgument.java	Sat Dec 17 19:59:18 2011 +0100
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2009, 2011, 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.sun.cri.xir;
+
+import com.sun.cri.ci.*;
+
+/**
+ * Represents an argument to an {@link XirSnippet}.
+ * Currently, this is a <i>union </i> type; it is either a {@link CiConstant} or an {@code Object}.
+ */
+public final class XirArgument {
+
+    public final CiConstant constant;
+    public final Object object;
+
+    private XirArgument(CiConstant value) {
+        this.constant = value;
+        this.object = null;
+    }
+
+    private XirArgument(Object o) {
+        this.constant = null;
+        this.object = o;
+    }
+
+    public static XirArgument forInternalObject(Object o) {
+        return new XirArgument(o);
+    }
+
+    public static XirArgument forInt(int x) {
+        return new XirArgument(CiConstant.forInt(x));
+    }
+
+    public static XirArgument forLong(long x) {
+        return new XirArgument(CiConstant.forLong(x));
+    }
+
+    public static XirArgument forObject(Object o) {
+        return new XirArgument(CiConstant.forObject(o));
+    }
+
+    @Override
+    public String toString() {
+        if (constant != null) {
+            return constant.toString();
+        } else {
+            return "" + object;
+        }
+    }
+}