--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/FunctionRootNode.java	Mon Nov 11 21:34:44 2013 +0100
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2012, 2013, 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.nodes;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.sl.builtins.*;
+import com.oracle.truffle.sl.runtime.*;
+
+public final class FunctionRootNode extends RootNode {
+
+    @Child private TypedNode body;
+
+    private final TypedNode uninitializedBody;
+    private final String name;
+    private final boolean alwaysInline;
+
+    private FunctionRootNode(TypedNode body, String name, boolean alwaysInline) {
+        super(null);
+        this.uninitializedBody = NodeUtil.cloneNode(body);
+        this.body = adoptChild(body);
+        this.name = name;
+        this.alwaysInline = alwaysInline;
+    }
+
+    public static CallTarget createBuiltin(SLContext context, NodeFactory<? extends BuiltinNode> factory, String name) {
+        int argumentCount = factory.getExecutionSignature().size();
+        TypedNode[] arguments = new TypedNode[argumentCount];
+        for (int i = 0; i < arguments.length; i++) {
+            arguments[i] = new ReadArgumentNode(i);
+        }
+        BuiltinNode buitinBody = factory.createNode(arguments, context);
+        FunctionRootNode root = new FunctionRootNode(buitinBody, name, true);
+        return Truffle.getRuntime().createCallTarget(root);
+    }
+
+    public static CallTarget createFunction(StatementNode body, FrameDescriptor frameDescriptor, String name, TypedNode returnValue, String[] parameterNames) {
+        FunctionBodyNode bodyContainer = new FunctionBodyNode(frameDescriptor, body, returnValue, parameterNames);
+        FunctionRootNode root = new FunctionRootNode(bodyContainer, name, false);
+        return Truffle.getRuntime().createCallTarget(root, frameDescriptor);
+    }
+
+    @Override
+    public Object execute(VirtualFrame frame) {
+        return body.executeGeneric(frame);
+    }
+
+    public boolean isAlwaysInline() {
+        return alwaysInline;
+    }
+
+    public TypedNode inline(ArgumentsNode clonedArgs) {
+        TypedNode clonedBody = NodeUtil.cloneNode(uninitializedBody);
+        if (clonedBody instanceof BuiltinNode) {
+            return inlineBuiltin(clonedArgs, (BuiltinNode) clonedBody);
+        } else if (clonedBody instanceof FunctionBodyNode) {
+            return inlineFunction(clonedArgs, (FunctionBodyNode) clonedBody);
+        } else {
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    private InlinedFunctionNode inlineFunction(ArgumentsNode clonedArgs, FunctionBodyNode clonedBody) {
+        return new InlinedFunctionNode(getCallTarget(), clonedBody, clonedArgs);
+    }
+
+    private static TypedNode inlineBuiltin(ArgumentsNode clonedArgs, BuiltinNode builtin) {
+        TypedNode[] callerArgs = clonedArgs.getArguments();
+        TypedNode[] builtinArgs = builtin.getArguments();
+        for (int i = 0; i < builtinArgs.length; i++) {
+            if (i < callerArgs.length) {
+                builtinArgs[i].replace(callerArgs[i]);
+            } else {
+                builtinArgs[i].replace(new NullLiteralNode());
+            }
+        }
+        return builtin;
+    }
+
+    public Node getUninitializedBody() {
+        return uninitializedBody;
+    }
+
+    @Override
+    public String toString() {
+        return "function " + name;
+    }
+
+    private static final class InlinedFunctionNode extends TypedNode implements InlinedCallSite {
+
+        @Child private FunctionBodyNode body;
+        @Child private ArgumentsNode arguments;
+
+        private final CallTarget callTarget;
+        private final FrameDescriptor frameDescriptor;
+
+        public InlinedFunctionNode(CallTarget callTarget, FunctionBodyNode body, ArgumentsNode arguments) {
+            this.callTarget = callTarget;
+            this.body = adoptChild(body);
+            this.frameDescriptor = body.getFrameDescriptor();
+            this.arguments = adoptChild(arguments);
+        }
+
+        @Override
+        public Object executeGeneric(VirtualFrame frame) {
+            SLArguments args = new SLArguments(arguments.executeArray(frame));
+            VirtualFrame childFrame = Truffle.getRuntime().createVirtualFrame(frame.pack(), args, frameDescriptor);
+            return body.executeGeneric(childFrame);
+        }
+
+        public CallTarget getCallTarget() {
+            return callTarget;
+        }
+
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}