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diff --git a/src/qml/jit/qv4lowering.cpp b/src/qml/jit/qv4lowering.cpp
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--- a/src/qml/jit/qv4lowering.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 <QLoggingCategory>
-
-#include "qv4lowering_p.h"
-#include "qv4graph_p.h"
-
-QT_REQUIRE_CONFIG(qml_tracing);
-
-QT_BEGIN_NAMESPACE
-namespace QV4 {
-namespace IR {
-
-Q_LOGGING_CATEGORY(lcLower, "qt.v4.ir.lowering")
-
-GenericLowering::GenericLowering(Function &f)
- : m_function(f)
-{}
-
-void GenericLowering::lower()
-{
- NodeWorkList worklist(graph());
- // The order doesn't really matter for generic lowering, as long as it's done in 1 pass, and
- // have any clean-up done afterwards.
- worklist.enqueueAllInputs(graph()->endNode());
-
- while (Node *n = worklist.dequeueNextNodeForVisiting()) {
- worklist.enqueueAllInputs(n);
-
- if (!CallPayload::isRuntimeCall(n->opcode()))
- continue;
-
- if (CallPayload::isVarArgsCall(n->opcode()))
- replaceWithVarArgsCall(n);
- else
- replaceWithCall(n);
- }
-}
-
-void GenericLowering::replaceWithCall(Node *n)
-{
- auto newOp = opBuilder()->getCall(n->opcode());
-
- QVarLengthArray<Node *, 32> args;
- if (CallPayload::takesEngineAsArg(n->opcode(), 0))
- args.append(graph()->engineNode());
- if (CallPayload::takesFunctionAsArg(n->opcode(), args.size()))
- args.append(graph()->functionNode());
- if (CallPayload::takesFrameAsArg(n->opcode(), args.size()))
- args.append(graph()->cppFrameNode());
- const int extraLeadingArguments = args.size();
-
- for (unsigned arg = 0, earg = n->inputCount(); arg != earg; ++arg) {
- Node *input = n->input(arg);
- if (input->opcode() == Meta::FrameState)
- continue;
-
- if (arg >= n->operation()->valueInputCount()) {
- // effect or control input
- args.append(input);
- continue;
- }
-
- if (CallPayload::needsStorageOnJSStack(n->opcode(), args.size(), input->operation(),
- function().nodeInfo(input)->type()))
- input = graph()->createNode(opBuilder()->get<Meta::Alloca>(), input);
-
- args.append(input);
- }
-
- Node *newCall = graph()->createNode(newOp, args.data(), args.size());
-
- qCDebug(lcLower) << "replacing node" << n->id() << n->operation()->debugString()
- << "with node" << newCall->id() << newOp->debugString();
- qCDebug(lcLower) << "... old node #inputs:" << n->inputCount();
- qCDebug(lcLower) << "... old node #uses:" << n->useCount();
-
- function().nodeInfo(newCall)->setType(CallPayload::returnType(n->opcode()));
- n->replaceAllUsesWith(newCall);
- n->kill();
-
- qCDebug(lcLower) << "... new node #inputs:" << newCall->inputCount();
- qCDebug(lcLower) << "... new node #uses:" << newCall->useCount();
-
- for (Node *use : newCall->uses()) {
- // fix-up indices for SelectOutput:
- if (use->opcode() == Meta::SelectOutput) {
- const int oldIndex = ConstantPayload::get(*use->input(1)->operation())->value().int_32();
- const int newIndex = oldIndex + extraLeadingArguments;
- use->replaceInput(1, graph()->createConstantIntNode(newIndex));
- use->replaceInput(2, newCall->input(newIndex));
- break;
- }
- }
-}
-
-void GenericLowering::replaceWithVarArgsCall(Node *n)
-{
- const bool isTailCall = n->opcode() == Meta::JSTailCall;
- Operation *newOp = isTailCall ? opBuilder()->getTailCall()
- : opBuilder()->getCall(n->opcode());
-
- //### optimize this for 0 and 1 argument: we don't need to create a VarArgs array for these cases
-
- const unsigned varArgsStart = CallPayload::varArgsStart(n->opcode()) - 1; // subtract 1 because the runtime calls all take the engine argument as arg0, which isn't in the graph before lowering.
- Node *vaAlloc = graph()->createNode(
- opBuilder()->get<Meta::VAAlloc>(),
- graph()->createConstantIntNode(n->operation()->valueInputCount() - varArgsStart),
- n->effectInput());
- QVarLengthArray<Node *, 32> vaSealIn;
- vaSealIn.append(vaAlloc);
- for (unsigned i = varArgsStart, ei = n->operation()->valueInputCount(); i != ei; ++i) {
- vaSealIn.append(graph()->createNode(opBuilder()->get<Meta::VAStore>(), vaAlloc,
- graph()->createConstantIntNode(vaSealIn.size() - 1),
- n->input(i)));
- }
- vaSealIn.append(vaAlloc);
- Node *vaSeal = graph()->createNode(opBuilder()->getVASeal(vaSealIn.size() - 2),
- vaSealIn.data(),
- vaSealIn.size());
- QVarLengthArray<Node *, 8> callArgs;
- if (isTailCall)
- callArgs.append(graph()->cppFrameNode());
- callArgs.append(graph()->engineNode());
- for (unsigned i = 0; i != varArgsStart; ++i) {
- Node *input = n->input(i);
- if (CallPayload::needsStorageOnJSStack(n->opcode(), callArgs.size(), input->operation(),
- function().nodeInfo(input)->type()))
- input = graph()->createNode(opBuilder()->get<Meta::Alloca>(), input);
- callArgs.append(input);
- }
- callArgs.append(vaSeal); // args
- if (n->opcode() != Meta::JSCreateClass) // JSCreateClass is the odd duck
- callArgs.append(graph()->createConstantIntNode(vaSealIn.size() - 2)); // argc
- callArgs.append(vaSeal); // effect
- callArgs.append(n->controlInput(0)); // control flow
- Node *newCall = graph()->createNode(newOp, callArgs.data(), unsigned(callArgs.size()));
-
- qCDebug(lcLower) << "replacing node" << n->id() << n->operation()->debugString()
- << "with node" << newCall->id() << newOp->debugString();
- qCDebug(lcLower) << "... old node #inputs:" << n->inputCount();
- qCDebug(lcLower) << "... old node #uses:" << n->useCount();
-
- n->replaceAllUsesWith(newCall);
- n->kill();
-
- qCDebug(lcLower) << "... new node #inputs:" << newCall->inputCount();
- qCDebug(lcLower) << "... new node #uses:" << newCall->useCount();
-}
-
-bool GenericLowering::allUsesAsUnboxedBool(Node *n)
-{
- for (Node *use : n->uses()) {
- if (use->operation()->kind() != Meta::Branch)
- return false;
- }
-
- return true;
-}
-
-} // IR namespace
-} // QV4 namespace
-QT_END_NAMESPACE
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