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diff --git a/src/qml/jit/qv4tracingjit.cpp b/src/qml/jit/qv4tracingjit.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/qloggingcategory.h>
+
+#include "qv4vme_moth_p.h"
+#include "qv4graphbuilder_p.h"
+
+QT_BEGIN_NAMESPACE
+
+Q_LOGGING_CATEGORY(lcTracing, "qt.v4.tracing")
+
+namespace QV4 {
+
+// This is the entry point for the "tracing JIT". It uses the sea-of-nodes concept as described in
+// https://scholarship.rice.edu/bitstream/handle/1911/96451/TR95-252.pdf
+//
+// The minimal pipeline is as follows:
+//  - create the graph for the function
+//  - do generic lowering
+//  - schedule the nodes
+//  - run minimal stack slot allocation (no re-use of slots)
+//  - run the assembler
+//
+// This pipeline has no optimizations, and generates quite inefficient code. It does have the
+// advantage that no trace information is used, so it can be used for testing where it replaces
+// the baseline JIT. Any optimizations are additions to this pipeline.
+//
+// Note: generators (or resuming functions in general) are not supported by this JIT.
+void Moth::runTracingJit(QV4::Function *function)
+{
+    IR::Function irFunction(function);
+    qCDebug(lcTracing).noquote() << "runTracingJit called for" << irFunction.name() << "...";
+
+    qCDebug(lcTracing).noquote().nospace() << function->traceInfoToString();
+
+    IR::GraphBuilder::buildGraph(&irFunction);
+    irFunction.dump(QStringLiteral("initial IR"));
+    irFunction.verify();
+}
+
+} // QV4 namespace
+QT_END_NAMESPACE