1 files changed, 127 insertions, 0 deletions
diff --git a/src/qml/compiler/qv4ssa_p.h b/src/qml/compiler/qv4ssa_p.h
new file mode 100644
index 0000000000..097a40eff1
--- /dev/null
+++ b/src/qml/compiler/qv4ssa_p.h
@@ -0,0 +1,127 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 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 QV4SSA_P_H
+#define QV4SSA_P_H
+
+#include "qv4jsir_p.h"
+
+QT_BEGIN_NAMESPACE
+namespace QQmlJS {
+namespace V4IR {
+
+class LifeTimeInterval {
+    struct Range {
+        int start;
+        int end;
+
+        Range(int start = Invalid, int end = Invalid)
+            : start(start)
+            , end(end)
+        {}
+    };
+
+    Temp _temp;
+    QList<Range> _ranges;
+    int _reg;
+
+public:
+    static const int Invalid = -1;
+
+    LifeTimeInterval()
+        : _reg(Invalid)
+    {}
+
+    void setTemp(const Temp &temp) { this->_temp = temp; }
+    Temp temp() const { return _temp; }
+
+    void setFrom(Stmt *from);
+    void addRange(Stmt *from, Stmt *to);
+
+    int start() const { return _ranges.first().start; }
+    int end() const { return _ranges.last().end; }
+
+    int reg() const { return _reg; }
+    void setReg(int reg) { _reg = reg; }
+
+    void dump() const;
+    static bool lessThan(const LifeTimeInterval &r1, const LifeTimeInterval &r2);
+};
+
+class Optimizer
+{
+public:
+    struct SSADeconstructionMove
+    {
+        Expr *source;
+        Temp *target;
+
+        bool needsConversion() const
+        { return target->type != source->type; }
+    };
+
+public:
+    Optimizer(Function *function)
+        : function(function)
+        , inSSA(false)
+    {}
+
+    void run();
+    void convertOutOfSSA();
+
+    bool isInSSA() const
+    { return inSSA; }
+
+    QList<SSADeconstructionMove> ssaDeconstructionMoves(BasicBlock *basicBlock);
+
+    QList<LifeTimeInterval> lifeRanges() const;
+
+private:
+    Function *function;
+    bool inSSA;
+    QHash<BasicBlock *, BasicBlock *> startEndLoops;
+};
+
+} // V4IR namespace
+} // QQmlJS namespace
+QT_END_NAMESPACE
+
+#endif // QV4SSA_P_H