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diff --git a/src/qml/qml/v4vm/qv4lookup_p.h b/src/qml/qml/v4vm/qv4lookup_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the V4VM module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QV4LOOKUP_H
+#define QV4LOOKUP_H
+
+#include "qv4global_p.h"
+#include "qv4runtime_p.h"
+#include "qv4engine_p.h"
+#include "qv4context_p.h"
+#include "qv4object_p.h"
+#include "qv4internalclass_p.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QQmlJS {
+namespace VM {
+
+struct Lookup {
+    enum { Size = 3 };
+    union {
+        void (*lookupProperty)(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+        void (*lookupGlobal)(Lookup *l, ExecutionContext *ctx, Value *result);
+    };
+    InternalClass *classList[Size];
+    int level;
+    uint index;
+    String *name;
+
+    static void lookupPropertyGeneric(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+    static void lookupProperty0(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+    static void lookupProperty1(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+    static void lookupProperty2(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+    static void lookupPropertyAccessor0(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+    static void lookupPropertyAccessor1(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+    static void lookupPropertyAccessor2(Lookup *l, ExecutionContext *ctx, Value *result, const Value &object);
+
+    static void lookupGlobalGeneric(Lookup *l, ExecutionContext *ctx, Value *result);
+    static void lookupGlobal0(Lookup *l, ExecutionContext *ctx, Value *result);
+    static void lookupGlobal1(Lookup *l, ExecutionContext *ctx, Value *result);
+    static void lookupGlobal2(Lookup *l, ExecutionContext *ctx, Value *result);
+    static void lookupGlobalAccessor0(Lookup *l, ExecutionContext *ctx, Value *result);
+    static void lookupGlobalAccessor1(Lookup *l, ExecutionContext *ctx, Value *result);
+    static void lookupGlobalAccessor2(Lookup *l, ExecutionContext *ctx, Value *result);
+
+    Property *lookup(Object *obj, PropertyAttributes *attrs) {
+        int i = 0;
+        while (i < level && obj && obj->internalClass == classList[i]) {
+            obj = obj->prototype;
+            ++i;
+        }
+
+        if (index != UINT_MAX && obj->internalClass == classList[i]) {
+            *attrs = obj->internalClass->propertyData.at(index);
+            return obj->memberData + index;
+        }
+
+        while (i < Size && obj) {
+            classList[i] = obj->internalClass;
+
+            index = obj->internalClass->find(name);
+            if (index != UINT_MAX) {
+                level = i;
+                *attrs = obj->internalClass->propertyData.at(index);
+                return obj->memberData + index;
+            }
+
+            obj = obj->prototype;
+            ++i;
+        }
+        level = i;
+
+        while (obj) {
+            index = obj->internalClass->find(name);
+            if (index != UINT_MAX) {
+                *attrs = obj->internalClass->propertyData.at(index);
+                return obj->memberData + index;
+            }
+
+            obj = obj->prototype;
+        }
+        return 0;
+    }
+
+    Property *setterLookup(Object *o, PropertyAttributes *attrs) {
+        if (o->internalClass == classList[0]) {
+            *attrs = o->internalClass->propertyData[index];
+            return o->memberData + index;
+        }
+
+        uint idx = o->internalClass->find(name);
+        if (idx != UINT_MAX) {
+            classList[0] = o->internalClass;
+            index = idx;
+            *attrs = o->internalClass->propertyData[index];
+            return o->memberData + index;
+        }
+        return 0;
+    }
+};
+
+}
+}
+
+QT_END_NAMESPACE
+
+#endif