--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/FunctionCallNode.java	Fri Jan 24 15:55:41 2014 +0100
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2012, 2012, 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.frame.*;
+import com.oracle.truffle.api.impl.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.sl.runtime.*;
+
+public abstract class FunctionCallNode extends TypedNode {
+
+    private static final int INLINE_CACHE_SIZE = 2;
+
+    @Child protected TypedNode functionNode;
+    @Child protected ArgumentsNode argumentsNode;
+
+    public FunctionCallNode(TypedNode functionNode, ArgumentsNode argumentsNode) {
+        this.functionNode = adoptChild(functionNode);
+        this.argumentsNode = adoptChild(argumentsNode);
+    }
+
+    @Override
+    public final Object executeGeneric(VirtualFrame frame) {
+        CallTarget function;
+        try {
+            function = functionNode.executeCallTarget(frame);
+        } catch (UnexpectedResultException e) {
+            throw new UnsupportedOperationException("Call to " + e.getMessage() + " not supported.");
+        }
+        Object[] arguments = argumentsNode.executeArray(frame);
+        return executeCall(frame, function, new SLArguments(arguments));
+    }
+
+    public abstract Object executeCall(VirtualFrame frame, CallTarget function, SLArguments arguments);
+
+    public static FunctionCallNode create(TypedNode function, TypedNode[] arguments) {
+        return new UninitializedCallNode(function, new ArgumentsNode(arguments), 0);
+    }
+
+    private static final class UninitializedCallNode extends FunctionCallNode {
+
+        protected final int depth;
+
+        UninitializedCallNode(TypedNode function, ArgumentsNode args, int depth) {
+            super(function, args);
+            this.depth = depth;
+        }
+
+        UninitializedCallNode(UninitializedCallNode copy) {
+            super(null, null);
+            this.depth = copy.depth + 1;
+        }
+
+        @Override
+        public Object executeCall(VirtualFrame frame, CallTarget function, SLArguments arguments) {
+            CompilerDirectives.transferToInterpreter();
+            return specialize(function).executeCall(frame, function, arguments);
+        }
+
+        private FunctionCallNode specialize(CallTarget function) {
+            CompilerAsserts.neverPartOfCompilation();
+            if (depth < INLINE_CACHE_SIZE) {
+                return replace(new CachedCallNode(functionNode, argumentsNode, function, new UninitializedCallNode(this)));
+            } else {
+                FunctionCallNode topMost = (FunctionCallNode) NodeUtil.getNthParent(this, depth);
+                return topMost.replace(new GenericCallNode(topMost.functionNode, topMost.argumentsNode));
+            }
+        }
+
+    }
+
+    private static final class CachedCallNode extends FunctionCallNode {
+
+        protected final CallTarget cachedFunction;
+
+        @Child protected CallNode callNode;
+        @Child protected FunctionCallNode nextNode;
+
+        public CachedCallNode(TypedNode function, ArgumentsNode arguments, CallTarget cachedFunction, FunctionCallNode next) {
+            super(function, arguments);
+            this.cachedFunction = cachedFunction;
+            this.callNode = adoptChild(CallNode.create(cachedFunction));
+            this.nextNode = adoptChild(next);
+
+            // inline usually known functions that should always be inlined
+            if (findSLFunctionRoot(cachedFunction).isInlineImmediatly()) {
+                if (callNode.isInlinable() && !callNode.isInlined()) {
+                    callNode.inline();
+                }
+            }
+        }
+
+        @Override
+        public Object executeCall(VirtualFrame frame, CallTarget function, SLArguments arguments) {
+            if (this.cachedFunction == function) {
+                return callNode.call(frame.pack(), arguments);
+            }
+            return nextNode.executeCall(frame, function, arguments);
+        }
+
+        private static FunctionRootNode findSLFunctionRoot(CallTarget target) {
+            return (FunctionRootNode) ((DefaultCallTarget) target).getRootNode();
+        }
+
+    }
+
+    private static final class GenericCallNode extends FunctionCallNode {
+
+        GenericCallNode(TypedNode functionNode, ArgumentsNode arguments) {
+            super(functionNode, arguments);
+        }
+
+        @Override
+        public Object executeCall(VirtualFrame frame, CallTarget function, SLArguments arguments) {
+            return function.call(frame.pack(), arguments);
+        }
+    }
+
+}