qqmljsstoragegeneralizer.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
#include "qqmljsstoragegeneralizer_p.h"
 
QT_BEGIN_NAMESPACE
 
QQmlJSCompilePass::InstructionAnnotations QQmlJSStorageGeneralizer::run(
        InstructionAnnotations annotations, Function *function,
        QQmlJS::DiagnosticMessage *error)
{
    m_error = error;
 
    if (QQmlJSScope::ConstPtr &returnType = function->returnType) {
        if (QQmlJSScope::ConstPtr stored = m_typeResolver->genericType(
                    returnType, QQmlJSTypeResolver::ComponentIsGeneric::Yes)) {
            returnType = stored;
        } else {
            setError(QStringLiteral("Cannot store the return type %1.")
                     .arg(returnType->internalName(), 0));
            return InstructionAnnotations();
        }
    }
 
    const auto transformRegister = [&](QQmlJSRegisterContent &content) {
        if (const QQmlJSScope::ConstPtr &specific = content.storedType())
            m_typeResolver->generalizeType(specific);
    };
 
    const auto transformRegisters = [&](VirtualRegisters &registers) {
        for (auto j = registers.begin(), jEnd = registers.end(); j != jEnd; ++j) {
            QQmlJSRegisterContent &content = j.value().content;
            transformRegister(content);
        }
    };
 
    for (QQmlJSRegisterContent &argument : function->argumentTypes) {
        Q_ASSERT(argument.isValid());
        transformRegister(argument);
    }
 
    for (auto i = annotations.begin(), iEnd = annotations.end(); i != iEnd; ++i) {
        transformRegister(i->second.changedRegister);
        transformRegisters(i->second.typeConversions);
    }
 
    return annotations;
}
 
QT_END_NAMESPACE