--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLFunction.java	Fri Jan 24 18:16:24 2014 -0800
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2014, 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.truffle.sl.runtime;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.utilities.*;
+
+public final class SLFunction {
+
+    private final String name;
+    private RootCallTarget callTarget;
+    private final CyclicAssumption callTargetStable;
+
+    protected SLFunction(String name) {
+        this.name = name;
+        this.callTargetStable = new CyclicAssumption(name);
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    protected void setCallTarget(RootCallTarget callTarget) {
+        this.callTarget = callTarget;
+        callTargetStable.invalidate();
+    }
+
+    public RootCallTarget getCallTarget() {
+        return callTarget;
+    }
+
+    public Assumption getCallTargetStable() {
+        return callTargetStable.getAssumption();
+    }
+
+    @Override
+    public String toString() {
+        return "function " + name;
+    }
+}