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Diffstat (limited to 'src/qmlcompiler/qqmljsbasicblocks_p.h')
-rw-r--r-- | src/qmlcompiler/qqmljsbasicblocks_p.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/qmlcompiler/qqmljsbasicblocks_p.h b/src/qmlcompiler/qqmljsbasicblocks_p.h new file mode 100644 index 0000000000..76f3216ce8 --- /dev/null +++ b/src/qmlcompiler/qqmljsbasicblocks_p.h @@ -0,0 +1,102 @@ +/**************************************************************************** +** +** 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 QQmlJSBasicBlocks : public QQmlJSCompilePass +{ +public: + struct BasicBlock { + QList<int> jumpOrigins; + QList<QQmlJSScope::ConstPtr> readRegisters; + 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> readers; + }; + + 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; + + 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; + bool m_skipUntilNextLabel = false; + bool m_hadBackJumps = false; +}; + +QT_END_NAMESPACE + +#endif // QQMLJSBASICBLOCKS_P_H |