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-rw-r--r--src/qml/jit/qv4mi.cpp251
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diff --git a/src/qml/jit/qv4mi.cpp b/src/qml/jit/qv4mi.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2018 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 <QtCore/qloggingcategory.h>
-#include <private/qqmlglobal_p.h>
-
-#include "qv4mi_p.h"
-#include "qv4node_p.h"
-
-QT_BEGIN_NAMESPACE
-namespace QV4 {
-namespace IR {
-
-Q_LOGGING_CATEGORY(lcMI, "qt.v4.ir.mi")
-
-QString MIOperand::debugString() const
-{
- switch (kind()) {
- case Invalid: return QStringLiteral("<<INVALID>>");
- case Constant: return ConstantPayload::debugString(constantValue());
- case VirtualRegister: return QStringLiteral("vreg%1").arg(virtualRegister());
- case EngineRegister: return QStringLiteral("engine");
- case CppFrameRegister: return QStringLiteral("cppFrame");
- case Function: return QStringLiteral("function");
- case JSStackSlot: return QStringLiteral("jsstack[%1]").arg(stackSlot());
- case BoolStackSlot: return QStringLiteral("bstack[%1]").arg(stackSlot());
- case JumpTarget: return targetBlock() ? QStringLiteral("L%1").arg(targetBlock()->index())
- : QStringLiteral("<<INVALID BLOCK>>");
- default: Q_UNREACHABLE();
- }
-}
-
-MIInstr *MIInstr::create(QQmlJS::MemoryPool *pool, Node *irNode, unsigned nOperands)
-{
- return pool->New<MIInstr>(irNode, pool, nOperands);
-}
-
-static QString commentIndent(const QString &line)
-{
- int spacing = std::max(70 - line.length(), 1);
- return line + QString(spacing, QLatin1Char(' '));
-}
-
-static QString indent(int nr)
-{
- QString s = nr == -1 ? QString() : QString::number(nr);
- int padding = 6 - s.size();
- if (padding > 0)
- s = QString(padding, QLatin1Char(' ')) + s;
- return s;
-}
-
-MIFunction::MIFunction(Function *irFunction)
- : m_irFunction(irFunction)
-{}
-
-void MIFunction::renumberBlocks()
-{
- for (size_t i = 0, ei = m_blocks.size(); i != ei; ++i) {
- MIBlock *b = m_blocks[i];
- b->setIndex(unsigned(i));
- }
-}
-
-void MIFunction::renumberInstructions()
-{
- int pos = 0;
- for (MIBlock *b : m_blocks) {
- for (MIInstr &instr : b->instructions()) {
- pos += 2;
- instr.setPosition(pos);
- }
- }
-}
-
-void MIFunction::dump(const QString &description) const
-{
- if (!lcMI().isDebugEnabled())
- return;
-
- QString s = description + QLatin1String(":\n");
- QString name;
- if (auto n = irFunction()->v4Function()->name())
- name = n->toQString();
- if (name.isEmpty())
- QString::asprintf("%p", static_cast<void *>(irFunction()->v4Function()));
- QString line = QStringLiteral("function %1 {").arg(name);
- auto loc = irFunction()->v4Function()->sourceLocation();
- s += commentIndent(line) + QStringLiteral("; %1:%2:%3\n").arg(loc.sourceFile,
- QString::number(loc.line),
- QString::number(loc.column));
- for (const MIBlock *b : blocks()) {
- line = QStringLiteral("L%1").arg(b->index());
- bool first = true;
- if (!b->arguments().empty()) {
- line += QLatin1Char('(');
- for (const MIOperand &arg : b->arguments()) {
- if (first)
- first = false;
- else
- line += QStringLiteral(", ");
- line += arg.debugString();
- }
- line += QLatin1Char(')');
- }
- line += QLatin1Char(':');
- line = commentIndent(line) + QStringLiteral("; preds: ");
- if (b->inEdges().isEmpty()) {
- line += QStringLiteral("<none>");
- } else {
- bool first = true;
- for (MIBlock *in : b->inEdges()) {
- if (first)
- first = false;
- else
- line += QStringLiteral(", ");
- line += QStringLiteral("L%1").arg(in->index());
- }
- }
- s += line + QLatin1Char('\n');
- for (const MIInstr &i : b->instructions()) {
- line = indent(i.position()) + QLatin1String(": ");
- if (i.hasDestination())
- line += i.destination().debugString() + QStringLiteral(" = ");
- line += i.irNode()->operation()->debugString();
- bool first = true;
- for (const MIOperand &op : i.operands()) {
- if (first)
- first = false;
- else
- line += QLatin1Char(',');
- line += QLatin1Char(' ') + op.debugString();
- }
- line = commentIndent(line) + QStringLiteral("; node-id: %1").arg(i.irNode()->id());
- if (i.irNode()->operation()->needsBytecodeOffsets())
- line += QStringLiteral(", bytecode-offset: %1").arg(irFunction()->nodeInfo(i.irNode())->currentInstructionOffset());
- s += line + QLatin1Char('\n');
- }
- s += commentIndent(QString()) + QStringLiteral("; succs: ");
- if (b->outEdges().isEmpty()) {
- s += QStringLiteral("<none>");
- } else {
- bool first = true;
- for (MIBlock *succ : b->outEdges()) {
- if (first)
- first = false;
- else
- s += QStringLiteral(", ");
- s += QStringLiteral("L%1").arg(succ->index());
- }
- }
- s += QLatin1Char('\n');
- }
- s += QLatin1Char('}');
-
- for (const QStringRef &line : s.splitRef('\n'))
- qCDebug(lcMI).noquote().nospace() << line;
-}
-
-unsigned MIFunction::extraJSSlots() const
-{
- uint interpreterFrameSize = CppStackFrame::requiredJSStackFrameSize(irFunction()->v4Function());
- if (m_jsSlotCount <= interpreterFrameSize)
- return 0;
- return m_jsSlotCount - interpreterFrameSize;
-}
-
-void MIFunction::setStartBlock(MIBlock *newStartBlock)
-{
- auto it = std::find(m_blocks.begin(), m_blocks.end(), newStartBlock);
- Q_ASSERT(it != m_blocks.end());
- std::swap(*m_blocks.begin(), *it);
-}
-
-void MIFunction::setStackSlotCounts(unsigned dword, unsigned qword, unsigned js)
-{
- m_vregCount = 0;
- m_dwordSlotCount = dword;
- m_qwordSlotCount = qword;
- m_jsSlotCount = js;
-}
-
-void MIFunction::verifyCFG() const
-{
- if (block(MIFunction::StartBlockIndex)->instructions().front().opcode() != Meta::Start)
- qFatal("MIFunction block 0 is not the start block");
-
- for (MIBlock *b : m_blocks) {
- for (MIBlock *in : b->inEdges()) {
- if (!in->outEdges().contains(b))
- qFatal("block %u has incoming edge from block %u, "
- "but does not appear in that block's outgoing edges",
- b->index(), in->index());
- }
- for (MIBlock *out : b->outEdges()) {
- if (!out->inEdges().contains(b))
- qFatal("block %u has outgoing edge from block %u, "
- "but does not appear in that block's incoming edges",
- b->index(), out->index());
- }
- }
-}
-
-MIBlock *MIBlock::findEdgeTo(Operation::Kind target) const
-{
- for (MIBlock *outEdge : outEdges()) {
- if (outEdge->instructions().front().opcode() == target)
- return outEdge;
- }
- return nullptr;
-}
-
-} // IR namespace
-} // QV4 namespace
-QT_END_NAMESPACE
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