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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <private/qv4bytecodegenerator_p.h>
#include <private/qv4compilercontext_p.h>
#include <private/qqmljsastfwd_p.h>
QT_USE_NAMESPACE
using namespace QV4;
using namespace Moth;
void BytecodeGenerator::setLocation(const QQmlJS::AST::SourceLocation &loc)
{
currentLine = static_cast<int>(loc.startLine);
}
int BytecodeGenerator::newRegister()
{
int t = currentReg++;
if (regCount < currentReg)
regCount = currentReg;
return t;
}
int BytecodeGenerator::newRegisterArray(int n)
{
int t = currentReg;
currentReg += n;
if (regCount < currentReg)
regCount = currentReg;
return t;
}
void BytecodeGenerator::finalize(Compiler::Context *context)
{
QByteArray code;
// content
QVector<int> instructionOffsets;
QVector<int> lineNumbers;
currentLine = startLine;
instructionOffsets.reserve(instructions.size());
for (const auto &i : qAsConst(instructions)) {
if (i.line != currentLine) {
Q_ASSERT(i.line > currentLine);
while (currentLine < i.line) {
lineNumbers.append(code.size());
++currentLine;
}
}
instructionOffsets.append(code.size());
code.append(reinterpret_cast<const char *>(&i.instr), i.size);
}
// resolve jumps
// qDebug() << "resolving jumps";
for (const auto &j : jumps) {
Q_ASSERT(j.linkedLabel != -1);
int linkedInstruction = labels.at(j.linkedLabel);
Q_ASSERT(linkedInstruction != -1);
int offset = instructionOffsets.at(j.instructionIndex) + j.offset;
// qDebug() << "offset data is at" << offset;
char *c = code.data() + offset;
int linkedInstructionOffset = instructionOffsets.at(linkedInstruction) - offset;
// qDebug() << "linked instruction" << linkedInstruction << "at " << instructionOffsets.at(linkedInstruction);
memcpy(c, &linkedInstructionOffset, sizeof(int));
}
context->code = code;
context->lineNumberMapping = lineNumbers;
}
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