diff options
Diffstat (limited to 'src/qml/compiler/qv4jssimplifier_p.h')
-rw-r--r-- | src/qml/compiler/qv4jssimplifier_p.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/qml/compiler/qv4jssimplifier_p.h b/src/qml/compiler/qv4jssimplifier_p.h new file mode 100644 index 0000000000..ae8d74135c --- /dev/null +++ b/src/qml/compiler/qv4jssimplifier_p.h @@ -0,0 +1,154 @@ +/**************************************************************************** +** +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the tools applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#ifndef QV4JSSIMPLIFIER +#define QV4JSSIMPLIFIER + +// +// 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/qv4global_p.h> + +#include "qqmlirbuilder_p.h" + +QT_BEGIN_NAMESPACE + +namespace QmlIR { +struct Document; +} + +namespace QV4 { +namespace CompiledData { +struct QmlUnit; +struct Location; +} +} + +class QQmlJavaScriptBindingExpressionSimplificationPass +{ +public: + QQmlJavaScriptBindingExpressionSimplificationPass(const QVector<QmlIR::Object*> &qmlObjects, QV4::IR::Module *jsModule, QV4::Compiler::JSUnitGenerator *unitGenerator); + + void reduceTranslationBindings(); + +private: + void reduceTranslationBindings(int objectIndex); + + void visit(QV4::IR::Stmt *s) + { + switch (s->stmtKind) { + case QV4::IR::Stmt::MoveStmt: + visitMove(s->asMove()); + break; + case QV4::IR::Stmt::RetStmt: + visitRet(s->asRet()); + break; + case QV4::IR::Stmt::CJumpStmt: + discard(); + break; + case QV4::IR::Stmt::ExpStmt: + discard(); + break; + case QV4::IR::Stmt::JumpStmt: + break; + case QV4::IR::Stmt::PhiStmt: + break; + } + } + + void visitMove(QV4::IR::Move *move); + void visitRet(QV4::IR::Ret *ret); + + void visitFunctionCall(const QString *name, QV4::IR::ExprList *args, QV4::IR::Temp *target); + + void discard() { _canSimplify = false; } + + bool simplifyBinding(QV4::IR::Function *function, QmlIR::Binding *binding); + bool detectTranslationCallAndConvertBinding(QmlIR::Binding *binding); + + const QVector<QmlIR::Object*> &qmlObjects; + QV4::IR::Module *jsModule; + QV4::Compiler::JSUnitGenerator *unitGenerator; + + bool _canSimplify; + const QString *_nameOfFunctionCalled; + QVector<int> _functionParameters; + int _functionCallReturnValue; + + QHash<int, QV4::IR::Expr*> _temps; + int _returnValueOfBindingExpression; + int _synthesizedConsts; + + QVector<int> irFunctionsToRemove; +}; + +class QQmlIRFunctionCleanser +{ +public: + QQmlIRFunctionCleanser(QV4::IR::Module *module, const QVector<QmlIR::Object*> &qmlObjects, const QVector<int> &functionsToRemove); + + void clean(); + +private: + virtual void visitMove(QV4::IR::Move *s) { + visit(s->source); + visit(s->target); + } + + void visit(QV4::IR::Stmt *s); + void visit(QV4::IR::Expr *e); + +private: + QV4::IR::Module *module; + const QVector<QmlIR::Object*> &qmlObjects; + const QVector<int> &functionsToRemove; + + QVector<int> newFunctionIndices; +}; + +QT_END_NAMESPACE + +#endif // QV4JSSIMPLIFIER |