1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQMLJSBASICBLOCKS_P_H
#define QQMLJSBASICBLOCKS_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#include <private/qqmljscompilepass_p.h>
#include <private/qflatmap_p.h>
QT_BEGIN_NAMESPACE
class Q_QMLCOMPILER_PRIVATE_EXPORT QQmlJSBasicBlocks : public QQmlJSCompilePass
{
public:
struct BasicBlock {
QList<int> jumpOrigins;
QList<int> readRegisters;
QList<int> writtenRegisters;
QList<QQmlJSScope::ConstPtr> readTypes;
int jumpTarget = -1;
bool jumpIsUnconditional = false;
};
QQmlJSBasicBlocks(const QV4::Compiler::JSUnitGenerator *unitGenerator,
const QQmlJSTypeResolver *typeResolver, QQmlJSLogger *logger)
: QQmlJSCompilePass(unitGenerator, typeResolver, logger)
{
}
~QQmlJSBasicBlocks() = default;
InstructionAnnotations run(const Function *function, const InstructionAnnotations &annotations);
private:
struct RegisterAccess
{
QList<QQmlJSScope::ConstPtr> trackedTypes;
QHash<int, QQmlJSScope::ConstPtr> typeReaders;
QHash<int, QList<int>> registerReadersAndConversions;
int trackedRegister;
};
QV4::Moth::ByteCodeHandler::Verdict startInstruction(QV4::Moth::Instr::Type type) override;
void endInstruction(QV4::Moth::Instr::Type type) override;
void generate_Jump(int offset) override;
void generate_JumpTrue(int offset) override;
void generate_JumpFalse(int offset) override;
void generate_JumpNoException(int offset) override;
void generate_JumpNotUndefined(int offset) override;
void generate_Ret() override;
void generate_ThrowException() override;
void generate_DefineArray(int argc, int argv) override;
enum JumpMode { Unconditional, Conditional };
void processJump(int offset, JumpMode mode);
void populateBasicBlocks();
void populateReaderLocations();
void adjustTypes();
InstructionAnnotations m_annotations;
QFlatMap<int, BasicBlock> m_basicBlocks;
QHash<int, RegisterAccess> m_readerLocations;
QList<int> m_arrayDefinitions;
bool m_skipUntilNextLabel = false;
bool m_hadBackJumps = false;
};
QT_END_NAMESPACE
#endif // QQMLJSBASICBLOCKS_P_H
|
