diff --git a/src/plugins/clangcodemodel/clangbackendcommunicator.cpp b/src/plugins/clangcodemodel/clangbackendcommunicator.cpp
new file mode 100644
index 00000000000..fc5603b0c04
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendcommunicator.cpp
@@ -0,0 +1,581 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#include "clangbackendcommunicator.h"
+
+#include "clangbackendlogging.h"
+#include "clangcompletionassistprocessor.h"
+#include "clangmodelmanagersupport.h"
+#include "clangutils.h"
+
+#include <coreplugin/editormanager/editormanager.h>
+#include <coreplugin/icore.h>
+#include <coreplugin/messagemanager.h>
+
+#include <cpptools/abstracteditorsupport.h>
+#include <cpptools/baseeditordocumentprocessor.h>
+#include <cpptools/cppmodelmanager.h>
+#include <cpptools/editordocumenthandle.h>
+#include <cpptools/projectinfo.h>
+#include <cpptools/cpptoolsbridge.h>
+
+#include <texteditor/codeassist/functionhintproposal.h>
+#include <texteditor/codeassist/iassistprocessor.h>
+#include <texteditor/texteditor.h>
+
+#include <clangsupport/filecontainer.h>
+#include <clangsupport/clangcodemodelservermessages.h>
+
+#include <utils/qtcassert.h>
+
+#include <QDateTime>
+#include <QDir>
+#include <QTextBlock>
+
+using namespace CPlusPlus;
+using namespace ClangBackEnd;
+using namespace TextEditor;
+
+enum { backEndStartTimeOutInMs = 10000 };
+
+static QString backendProcessPath()
+{
+    return Core::ICore::libexecPath()
+            + QStringLiteral("/clangbackend")
+            + QStringLiteral(QTC_HOST_EXE_SUFFIX);
+}
+
+namespace ClangCodeModel {
+namespace Internal {
+
+class DummyBackendSender : public BackendSender
+{
+public:
+    DummyBackendSender() : BackendSender(nullptr) {}
+
+    void end() override {}
+    void registerTranslationUnitsForEditor(const RegisterTranslationUnitForEditorMessage &) override {}
+    void updateTranslationUnitsForEditor(const UpdateTranslationUnitsForEditorMessage &) override {}
+    void unregisterTranslationUnitsForEditor(const UnregisterTranslationUnitsForEditorMessage &) override {}
+    void registerProjectPartsForEditor(const RegisterProjectPartsForEditorMessage &) override {}
+    void unregisterProjectPartsForEditor(const UnregisterProjectPartsForEditorMessage &) override {}
+    void registerUnsavedFilesForEditor(const RegisterUnsavedFilesForEditorMessage &) override {}
+    void unregisterUnsavedFilesForEditor(const UnregisterUnsavedFilesForEditorMessage &) override {}
+    void completeCode(const CompleteCodeMessage &) override {}
+    void requestDocumentAnnotations(const RequestDocumentAnnotationsMessage &) override {}
+    void requestReferences(const RequestReferencesMessage &) override {}
+    void requestFollowSymbol(const RequestFollowSymbolMessage &) override {}
+    void updateVisibleTranslationUnits(const UpdateVisibleTranslationUnitsMessage &) override {}
+};
+
+
+BackendCommunicator::BackendCommunicator()
+    : m_connection(&m_receiver)
+    , m_sender(new DummyBackendSender())
+{
+    m_backendStartTimeOut.setSingleShot(true);
+    connect(&m_backendStartTimeOut, &QTimer::timeout,
+            this, &BackendCommunicator::logStartTimeOut);
+
+    m_receiver.setAliveHandler([this]() { m_connection.resetProcessAliveTimer(); });
+
+    connect(Core::EditorManager::instance(), &Core::EditorManager::editorAboutToClose,
+            this, &BackendCommunicator::onEditorAboutToClose);
+    connect(Core::ICore::instance(), &Core::ICore::coreAboutToClose,
+            this, &BackendCommunicator::setupDummySender);
+
+    initializeBackend();
+}
+
+BackendCommunicator::~BackendCommunicator()
+{
+    disconnect(&m_connection, 0, this, 0);
+}
+
+void BackendCommunicator::initializeBackend()
+{
+    const QString clangBackEndProcessPath = backendProcessPath();
+    if (!QFileInfo(clangBackEndProcessPath).exists()) {
+        logExecutableDoesNotExist();
+        return;
+    }
+    qCDebug(ipcLog) << "Starting" << clangBackEndProcessPath;
+
+    m_connection.setProcessAliveTimerInterval(30 * 1000);
+    m_connection.setProcessPath(clangBackEndProcessPath);
+
+    connect(&m_connection, &ConnectionClient::connectedToLocalSocket,
+            this, &BackendCommunicator::onConnectedToBackend);
+    connect(&m_connection, &ConnectionClient::disconnectedFromLocalSocket,
+            this, &BackendCommunicator::setupDummySender);
+
+    m_connection.startProcessAndConnectToServerAsynchronously();
+    m_backendStartTimeOut.start(backEndStartTimeOutInMs);
+}
+
+static QStringList projectPartOptions(const CppTools::ProjectPart::Ptr &projectPart)
+{
+    const QStringList options = ClangCodeModel::Utils::createClangOptions(projectPart,
+        CppTools::ProjectFile::Unsupported); // No language option
+
+    return options;
+}
+
+static ProjectPartContainer toProjectPartContainer(
+        const CppTools::ProjectPart::Ptr &projectPart)
+{
+    const QStringList options = projectPartOptions(projectPart);
+
+    return ProjectPartContainer(projectPart->id(), Utf8StringVector(options));
+}
+
+static QVector<ProjectPartContainer> toProjectPartContainers(
+        const QVector<CppTools::ProjectPart::Ptr> projectParts)
+{
+    QVector<ProjectPartContainer> projectPartContainers;
+    projectPartContainers.reserve(projectParts.size());
+
+    foreach (const CppTools::ProjectPart::Ptr &projectPart, projectParts)
+        projectPartContainers << toProjectPartContainer(projectPart);
+
+    return projectPartContainers;
+}
+
+void BackendCommunicator::registerFallbackProjectPart()
+{
+    const auto projectPart = CppTools::CppModelManager::instance()->fallbackProjectPart();
+    const auto projectPartContainer = toProjectPartContainer(projectPart);
+
+    registerProjectPartsForEditor({projectPartContainer});
+}
+
+namespace {
+Utf8String currentCppEditorDocumentFilePath()
+{
+    Utf8String currentCppEditorDocumentFilePath;
+
+    const auto currentEditor = Core::EditorManager::currentEditor();
+    if (currentEditor && CppTools::CppModelManager::isCppEditor(currentEditor)) {
+        const auto currentDocument = currentEditor->document();
+        if (currentDocument)
+            currentCppEditorDocumentFilePath = currentDocument->filePath().toString();
+    }
+
+    return currentCppEditorDocumentFilePath;
+}
+
+void removeDuplicates(Utf8StringVector &visibleEditorDocumentsFilePaths)
+{
+    std::sort(visibleEditorDocumentsFilePaths.begin(),
+              visibleEditorDocumentsFilePaths.end());
+    const auto end = std::unique(visibleEditorDocumentsFilePaths.begin(),
+                                 visibleEditorDocumentsFilePaths.end());
+    visibleEditorDocumentsFilePaths.erase(end,
+                                          visibleEditorDocumentsFilePaths.end());
+}
+
+void removeNonCppEditors(QList<Core::IEditor*> &visibleEditors)
+{
+    const auto isNotCppEditor = [] (Core::IEditor *editor) {
+        return !CppTools::CppModelManager::isCppEditor(editor);
+    };
+
+    const auto end = std::remove_if(visibleEditors.begin(),
+                                    visibleEditors.end(),
+                                    isNotCppEditor);
+
+    visibleEditors.erase(end, visibleEditors.end());
+}
+
+Utf8StringVector visibleCppEditorDocumentsFilePaths()
+{
+    auto visibleEditors = CppTools::CppToolsBridge::visibleEditors();
+
+    removeNonCppEditors(visibleEditors);
+
+    Utf8StringVector visibleCppEditorDocumentsFilePaths;
+    visibleCppEditorDocumentsFilePaths.reserve(visibleEditors.size());
+
+    const auto editorFilePaths = [] (Core::IEditor *editor) {
+        return Utf8String(editor->document()->filePath().toString());
+    };
+
+    std::transform(visibleEditors.begin(),
+                   visibleEditors.end(),
+                   std::back_inserter(visibleCppEditorDocumentsFilePaths),
+                   editorFilePaths);
+
+    removeDuplicates(visibleCppEditorDocumentsFilePaths);
+
+    return visibleCppEditorDocumentsFilePaths;
+}
+
+}
+
+void BackendCommunicator::updateTranslationUnitVisiblity()
+{
+    updateTranslationUnitVisiblity(currentCppEditorDocumentFilePath(), visibleCppEditorDocumentsFilePaths());
+}
+
+bool BackendCommunicator::isNotWaitingForCompletion() const
+{
+    return !m_receiver.isExpectingCodeCompletedMessage();
+}
+
+void BackendCommunicator::updateTranslationUnitVisiblity(const Utf8String &currentEditorFilePath,
+                                                     const Utf8StringVector &visibleEditorsFilePaths)
+{
+    const UpdateVisibleTranslationUnitsMessage message(currentEditorFilePath, visibleEditorsFilePaths);
+    m_sender->updateVisibleTranslationUnits(message);
+}
+
+void BackendCommunicator::registerCurrentProjectParts()
+{
+    using namespace CppTools;
+
+    const QList<ProjectInfo> projectInfos = CppModelManager::instance()->projectInfos();
+    foreach (const ProjectInfo &projectInfo, projectInfos)
+        registerProjectsParts(projectInfo.projectParts());
+}
+
+void BackendCommunicator::restoreCppEditorDocuments()
+{
+    resetCppEditorDocumentProcessors();
+    registerVisibleCppEditorDocumentAndMarkInvisibleDirty();
+}
+
+void BackendCommunicator::resetCppEditorDocumentProcessors()
+{
+    using namespace CppTools;
+
+    const auto cppEditorDocuments = CppModelManager::instance()->cppEditorDocuments();
+    foreach (CppEditorDocumentHandle *cppEditorDocument, cppEditorDocuments)
+        cppEditorDocument->resetProcessor();
+}
+
+void BackendCommunicator::registerVisibleCppEditorDocumentAndMarkInvisibleDirty()
+{
+    CppTools::CppModelManager::instance()->updateCppEditorDocuments();
+}
+
+void BackendCommunicator::registerCurrentCodeModelUiHeaders()
+{
+    using namespace CppTools;
+
+    const auto editorSupports = CppModelManager::instance()->abstractEditorSupports();
+    foreach (const AbstractEditorSupport *es, editorSupports) {
+        const QString mappedPath
+                = ModelManagerSupportClang::instance()->dummyUiHeaderOnDiskPath(es->fileName());
+        updateUnsavedFile(mappedPath, es->contents(), es->revision());
+    }
+}
+
+void BackendCommunicator::registerProjectsParts(const QVector<CppTools::ProjectPart::Ptr> projectParts)
+{
+    const auto projectPartContainers = toProjectPartContainers(projectParts);
+    registerProjectPartsForEditor(projectPartContainers);
+}
+
+void BackendCommunicator::updateTranslationUnitFromCppEditorDocument(const QString &filePath)
+{
+    const CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath);
+
+    updateTranslationUnit(filePath, document->contents(), document->revision());
+}
+
+void BackendCommunicator::updateUnsavedFileFromCppEditorDocument(const QString &filePath)
+{
+    const CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath);
+
+    updateUnsavedFile(filePath, document->contents(), document->revision());
+}
+
+void BackendCommunicator::updateTranslationUnit(const QString &filePath,
+                                            const QByteArray &contents,
+                                            uint documentRevision)
+{
+    const bool hasUnsavedContent = true;
+
+    updateTranslationUnitsForEditor({{filePath,
+                                      Utf8String(),
+                                      Utf8String::fromByteArray(contents),
+                                      hasUnsavedContent,
+                                      documentRevision}});
+}
+
+void BackendCommunicator::updateUnsavedFile(const QString &filePath, const QByteArray &contents, uint documentRevision)
+{
+    const bool hasUnsavedContent = true;
+
+    // TODO: Send new only if changed
+    registerUnsavedFilesForEditor({{filePath,
+                                    Utf8String(),
+                                    Utf8String::fromByteArray(contents),
+                                    hasUnsavedContent,
+                                    documentRevision}});
+}
+
+static bool documentHasChanged(const QString &filePath, uint revision)
+{
+    if (CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath))
+        return document->sendTracker().shouldSendRevision(revision);
+
+    return true;
+}
+
+static void setLastSentDocumentRevision(const QString &filePath, uint revision)
+{
+    if (CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath))
+        document->sendTracker().setLastSentRevision(int(revision));
+}
+
+void BackendCommunicator::updateTranslationUnitWithRevisionCheck(const FileContainer &fileContainer)
+{
+    if (documentHasChanged(fileContainer.filePath(), fileContainer.documentRevision())) {
+        updateTranslationUnitsForEditor({fileContainer});
+        setLastSentDocumentRevision(fileContainer.filePath(),
+                                    fileContainer.documentRevision());
+    }
+}
+
+void BackendCommunicator::requestDocumentAnnotations(const FileContainer &fileContainer)
+{
+    const RequestDocumentAnnotationsMessage message(fileContainer);
+    m_sender->requestDocumentAnnotations(message);
+}
+
+QFuture<CppTools::CursorInfo> BackendCommunicator::requestReferences(
+        const FileContainer &fileContainer,
+        quint32 line,
+        quint32 column,
+        QTextDocument *textDocument,
+        const CppTools::SemanticInfo::LocalUseMap &localUses)
+{
+    const RequestReferencesMessage message(fileContainer, line, column);
+    m_sender->requestReferences(message);
+
+    return m_receiver.addExpectedReferencesMessage(message.ticketNumber(), textDocument,
+                                                      localUses);
+}
+
+QFuture<CppTools::SymbolInfo> BackendCommunicator::requestFollowSymbol(
+        const FileContainer &curFileContainer,
+        const QVector<Utf8String> &dependentFiles,
+        quint32 line,
+        quint32 column)
+{
+    const RequestFollowSymbolMessage message(curFileContainer,
+                                             dependentFiles,
+                                             line,
+                                             column);
+    m_sender->requestFollowSymbol(message);
+
+    return m_receiver.addExpectedRequestFollowSymbolMessage(message.ticketNumber());
+}
+
+void BackendCommunicator::updateTranslationUnitWithRevisionCheck(Core::IDocument *document)
+{
+    const auto textDocument = qobject_cast<TextDocument*>(document);
+    const auto filePath = textDocument->filePath().toString();
+    const QString projectPartId = CppTools::CppToolsBridge::projectPartIdForFile(filePath);
+
+    updateTranslationUnitWithRevisionCheck(FileContainer(filePath,
+                                                         projectPartId,
+                                                         Utf8StringVector(),
+                                                         textDocument->document()->revision()));
+}
+
+void BackendCommunicator::updateChangeContentStartPosition(const QString &filePath, int position)
+{
+    if (CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath))
+        document->sendTracker().applyContentChange(position);
+}
+
+void BackendCommunicator::updateTranslationUnitIfNotCurrentDocument(Core::IDocument *document)
+{
+    QTC_ASSERT(document, return);
+    if (Core::EditorManager::currentDocument() != document)
+        updateTranslationUnit(document);
+}
+
+void BackendCommunicator::updateTranslationUnit(Core::IDocument *document)
+{
+    updateTranslationUnitFromCppEditorDocument(document->filePath().toString());
+}
+
+void BackendCommunicator::updateUnsavedFile(Core::IDocument *document)
+{
+    QTC_ASSERT(document, return);
+
+     updateUnsavedFileFromCppEditorDocument(document->filePath().toString());
+}
+
+void BackendCommunicator::onConnectedToBackend()
+{
+    m_backendStartTimeOut.stop();
+
+    ++m_connectedCount;
+    if (m_connectedCount > 1)
+        logRestartedDueToUnexpectedFinish();
+
+    m_receiver.reset();
+    m_sender.reset(new BackendSender(&m_connection));
+
+    initializeBackendWithCurrentData();
+}
+
+void BackendCommunicator::onEditorAboutToClose(Core::IEditor *editor)
+{
+    if (auto *textEditor = qobject_cast<TextEditor::BaseTextEditor *>(editor))
+        m_receiver.deleteProcessorsOfEditorWidget(textEditor->editorWidget());
+}
+
+void BackendCommunicator::setupDummySender()
+{
+    m_sender.reset(new DummyBackendSender);
+}
+
+void BackendCommunicator::logExecutableDoesNotExist()
+{
+    const QString msg
+        = tr("Clang Code Model: Error: "
+             "The clangbackend executable \"%1\" does not exist.")
+                .arg(QDir::toNativeSeparators(backendProcessPath()));
+
+    logError(msg);
+}
+
+void BackendCommunicator::logStartTimeOut()
+{
+    const QString msg
+        = tr("Clang Code Model: Error: "
+             "The clangbackend executable \"%1\" could not be started (timeout after %2ms).")
+                .arg(QDir::toNativeSeparators(backendProcessPath()))
+                .arg(backEndStartTimeOutInMs);
+
+    logError(msg);
+}
+
+void BackendCommunicator::logRestartedDueToUnexpectedFinish()
+{
+    const QString msg
+        = tr("Clang Code Model: Error: "
+             "The clangbackend process has finished unexpectedly and was restarted.");
+
+    logError(msg);
+}
+
+void BackendCommunicator::logError(const QString &text)
+{
+    const QString textWithTimestamp = QDateTime::currentDateTime().toString(Qt::ISODate)
+            + ' ' + text;
+    Core::MessageManager::write(textWithTimestamp, Core::MessageManager::Flash);
+    qWarning("%s", qPrintable(textWithTimestamp));
+}
+
+void BackendCommunicator::initializeBackendWithCurrentData()
+{
+    registerFallbackProjectPart();
+    registerCurrentProjectParts();
+    registerCurrentCodeModelUiHeaders();
+    restoreCppEditorDocuments();
+    updateTranslationUnitVisiblity();
+
+    emit backendReinitialized();
+}
+
+BackendSender *BackendCommunicator::setBackendSender(BackendSender *sender)
+{
+    BackendSender *previousSender = m_sender.take();
+    m_sender.reset(sender);
+    return previousSender;
+}
+
+void BackendCommunicator::killBackendProcess()
+{
+    m_connection.processForTestOnly()->kill();
+}
+
+void BackendCommunicator::registerTranslationUnitsForEditor(const FileContainers &fileContainers)
+{
+    const RegisterTranslationUnitForEditorMessage message(fileContainers,
+                                                          currentCppEditorDocumentFilePath(),
+                                                          visibleCppEditorDocumentsFilePaths());
+    m_sender->registerTranslationUnitsForEditor(message);
+}
+
+void BackendCommunicator::updateTranslationUnitsForEditor(const FileContainers &fileContainers)
+{
+    const UpdateTranslationUnitsForEditorMessage message(fileContainers);
+    m_sender->updateTranslationUnitsForEditor(message);
+}
+
+void BackendCommunicator::unregisterTranslationUnitsForEditor(const FileContainers &fileContainers)
+{
+    const UnregisterTranslationUnitsForEditorMessage message(fileContainers);
+    m_sender->unregisterTranslationUnitsForEditor(message);
+}
+
+void BackendCommunicator::registerProjectPartsForEditor(
+        const ProjectPartContainers &projectPartContainers)
+{
+    const RegisterProjectPartsForEditorMessage message(projectPartContainers);
+    m_sender->registerProjectPartsForEditor(message);
+}
+
+void BackendCommunicator::unregisterProjectPartsForEditor(const QStringList &projectPartIds)
+{
+    const UnregisterProjectPartsForEditorMessage message((Utf8StringVector(projectPartIds)));
+    m_sender->unregisterProjectPartsForEditor(message);
+}
+
+void BackendCommunicator::registerUnsavedFilesForEditor(const FileContainers &fileContainers)
+{
+    const RegisterUnsavedFilesForEditorMessage message(fileContainers);
+    m_sender->registerUnsavedFilesForEditor(message);
+}
+
+void BackendCommunicator::unregisterUnsavedFilesForEditor(const FileContainers &fileContainers)
+{
+    const UnregisterUnsavedFilesForEditorMessage message(fileContainers);
+    m_sender->unregisterUnsavedFilesForEditor(message);
+}
+
+void BackendCommunicator::completeCode(ClangCompletionAssistProcessor *assistProcessor,
+                                   const QString &filePath,
+                                   quint32 line,
+                                   quint32 column,
+                                   const QString &projectFilePath,
+                                   qint32 funcNameStartLine,
+                                   qint32 funcNameStartColumn)
+{
+    const CompleteCodeMessage message(filePath, line, column, projectFilePath, funcNameStartLine,
+                                      funcNameStartColumn);
+    m_sender->completeCode(message);
+    m_receiver.addExpectedCodeCompletedMessage(message.ticketNumber(), assistProcessor);
+}
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangbackendipcintegration.h b/src/plugins/clangcodemodel/clangbackendcommunicator.h
similarity index 55%
rename from src/plugins/clangcodemodel/clangbackendipcintegration.h
rename to src/plugins/clangcodemodel/clangbackendcommunicator.h
index 5c7eb6f9225..86054e566f0 100644
--- a/src/plugins/clangcodemodel/clangbackendipcintegration.h
+++ b/src/plugins/clangcodemodel/clangbackendcommunicator.h
@@ -25,135 +25,42 @@
 
 #pragma once
 
+#include "clangbackendreceiver.h"
+#include "clangbackendsender.h"
+
 #include <cpptools/projectpart.h>
-#include <cpptools/cppcursorinfo.h>
-#include <cpptools/cppsymbolinfo.h>
 
 #include <clangsupport/clangcodemodelconnectionclient.h>
 #include <clangsupport/filecontainer.h>
-#include <clangsupport/clangcodemodelclientinterface.h>
 #include <clangsupport/projectpartcontainer.h>
 
 #include <QFuture>
 #include <QObject>
-#include <QPointer>
-#include <QSharedPointer>
-#include <QTextDocument>
 #include <QVector>
-
-#include <functional>
+#include <QTimer>
 
 namespace Core {
 class IEditor;
 class IDocument;
 }
 
-namespace ClangBackEnd {
-class DocumentAnnotationsChangedMessage;
-}
-
-namespace TextEditor {
-class TextEditorWidget;
-class TextDocument;
-}
-
 namespace ClangCodeModel {
 namespace Internal {
 
-class ModelManagerSupportClang;
-
 class ClangCompletionAssistProcessor;
 
-class IpcReceiver : public ClangBackEnd::ClangCodeModelClientInterface
-{
-public:
-    IpcReceiver();
-    ~IpcReceiver();
-
-    using AliveHandler = std::function<void ()>;
-    void setAliveHandler(const AliveHandler &handler);
-
-    void addExpectedCodeCompletedMessage(quint64 ticket, ClangCompletionAssistProcessor *processor);
-    void deleteProcessorsOfEditorWidget(TextEditor::TextEditorWidget *textEditorWidget);
-
-    QFuture<CppTools::CursorInfo>
-    addExpectedReferencesMessage(quint64 ticket,
-                                 QTextDocument *textDocument,
-                                 const CppTools::SemanticInfo::LocalUseMap &localUses);
-    QFuture<CppTools::SymbolInfo> addExpectedRequestFollowSymbolMessage(quint64 ticket);
-    bool isExpectingCodeCompletedMessage() const;
-
-    void reset();
-
-private:
-    void alive() override;
-    void echo(const ClangBackEnd::EchoMessage &message) override;
-    void codeCompleted(const ClangBackEnd::CodeCompletedMessage &message) override;
-
-    void documentAnnotationsChanged(const ClangBackEnd::DocumentAnnotationsChangedMessage &message) override;
-    void references(const ClangBackEnd::ReferencesMessage &message) override;
-    void followSymbol(const ClangBackEnd::FollowSymbolMessage &message) override;
-
-private:
-    AliveHandler m_aliveHandler;
-    QHash<quint64, ClangCompletionAssistProcessor *> m_assistProcessorsTable;
-
-    struct ReferencesEntry {
-        ReferencesEntry() = default;
-        ReferencesEntry(QFutureInterface<CppTools::CursorInfo> futureInterface,
-                        QTextDocument *textDocument,
-                        const CppTools::SemanticInfo::LocalUseMap &localUses)
-            : futureInterface(futureInterface)
-            , textDocument(textDocument)
-            , localUses(localUses) {}
-        QFutureInterface<CppTools::CursorInfo> futureInterface;
-        QPointer<QTextDocument> textDocument;
-        CppTools::SemanticInfo::LocalUseMap localUses;
-    };
-    QHash<quint64, ReferencesEntry> m_referencesTable;
-
-    QHash<quint64, QFutureInterface<CppTools::SymbolInfo>> m_followTable;
-};
-
-class IpcSender : public ClangBackEnd::ClangCodeModelServerInterface
-{
-public:
-    IpcSender(ClangBackEnd::ClangCodeModelConnectionClient *connectionClient);
-
-    void end() override;
-    void registerTranslationUnitsForEditor(const ClangBackEnd::RegisterTranslationUnitForEditorMessage &message) override;
-    void updateTranslationUnitsForEditor(const ClangBackEnd::UpdateTranslationUnitsForEditorMessage &message) override;
-    void unregisterTranslationUnitsForEditor(const ClangBackEnd::UnregisterTranslationUnitsForEditorMessage &message) override;
-    void registerProjectPartsForEditor(const ClangBackEnd::RegisterProjectPartsForEditorMessage &message) override;
-    void unregisterProjectPartsForEditor(const ClangBackEnd::UnregisterProjectPartsForEditorMessage &message) override;
-    void registerUnsavedFilesForEditor(const ClangBackEnd::RegisterUnsavedFilesForEditorMessage &message) override;
-    void unregisterUnsavedFilesForEditor(const ClangBackEnd::UnregisterUnsavedFilesForEditorMessage &message) override;
-    void completeCode(const ClangBackEnd::CompleteCodeMessage &message) override;
-    void requestDocumentAnnotations(const ClangBackEnd::RequestDocumentAnnotationsMessage &message) override;
-    void requestReferences(const ClangBackEnd::RequestReferencesMessage &message) override;
-    void requestFollowSymbol(const ClangBackEnd::RequestFollowSymbolMessage &message) override;
-    void updateVisibleTranslationUnits(const ClangBackEnd::UpdateVisibleTranslationUnitsMessage &message) override;
-
-private:
-    bool isConnected() const;
-
-private:
-    ClangBackEnd::ClangCodeModelConnectionClient *m_connection = nullptr;
-};
-
-class IpcCommunicator : public QObject
+class BackendCommunicator : public QObject
 {
     Q_OBJECT
 
 public:
-    using Ptr = QSharedPointer<IpcCommunicator>;
     using FileContainer = ClangBackEnd::FileContainer;
     using FileContainers = QVector<ClangBackEnd::FileContainer>;
     using ProjectPartContainers = QVector<ClangBackEnd::ProjectPartContainer>;
 
 public:
-    IpcCommunicator();
-    ~IpcCommunicator();
+    BackendCommunicator();
+    ~BackendCommunicator();
 
     void registerTranslationUnitsForEditor(const FileContainers &fileContainers);
     void updateTranslationUnitsForEditor(const FileContainers &fileContainers);
@@ -199,7 +106,7 @@ public:
     bool isNotWaitingForCompletion() const;
 
 public: // for tests
-    IpcSender *setIpcSender(IpcSender *ipcSender);
+    BackendSender *setBackendSender(BackendSender *sender);
     void killBackendProcess();
 
 signals: // for tests
@@ -229,10 +136,10 @@ private:
                                         const Utf8StringVector &visibleEditorsFilePaths);
 
 private:
-    IpcReceiver m_ipcReceiver;
+    BackendReceiver m_receiver;
     ClangBackEnd::ClangCodeModelConnectionClient m_connection;
     QTimer m_backendStartTimeOut;
-    QScopedPointer<IpcSender> m_ipcSender;
+    QScopedPointer<BackendSender> m_sender;
     int m_connectedCount = 0;
 };
 
diff --git a/src/plugins/clangcodemodel/clangbackendipcintegration.cpp b/src/plugins/clangcodemodel/clangbackendipcintegration.cpp
deleted file mode 100644
index 8a953af9c32..00000000000
--- a/src/plugins/clangcodemodel/clangbackendipcintegration.cpp
+++ /dev/null
@@ -1,927 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of Qt Creator.
-**
-** 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 General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 as published by the Free Software
-** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-** 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-3.0.html.
-**
-****************************************************************************/
-
-#include "clangbackendipcintegration.h"
-
-#include "clangcompletionassistprocessor.h"
-#include "clangeditordocumentprocessor.h"
-#include "clangmodelmanagersupport.h"
-#include "clangutils.h"
-
-#include <coreplugin/editormanager/editormanager.h>
-#include <coreplugin/icore.h>
-#include <coreplugin/messagemanager.h>
-
-#include <cpptools/abstracteditorsupport.h>
-#include <cpptools/baseeditordocumentprocessor.h>
-#include <cpptools/cppmodelmanager.h>
-#include <cpptools/cpptoolsbridge.h>
-#include <cpptools/editordocumenthandle.h>
-#include <cpptools/projectinfo.h>
-
-#include <texteditor/codeassist/functionhintproposal.h>
-#include <texteditor/codeassist/iassistprocessor.h>
-#include <texteditor/texteditor.h>
-
-#include <utils/hostosinfo.h>
-#include <utils/qtcassert.h>
-
-#include <clangsupport/clangcodemodelservermessages.h>
-#include <clangsupport/clangcodemodelclientmessages.h>
-#include <clangsupport/filecontainer.h>
-
-#include <cplusplus/Icons.h>
-
-#include <QDateTime>
-#include <QDir>
-#include <QElapsedTimer>
-#include <QLoggingCategory>
-#include <QProcess>
-#include <QTextBlock>
-
-static Q_LOGGING_CATEGORY(log, "qtc.clangcodemodel.ipc")
-
-using namespace CPlusPlus;
-using namespace ClangCodeModel;
-using namespace ClangCodeModel::Internal;
-using namespace ClangBackEnd;
-using namespace TextEditor;
-
-static QString backendProcessPath()
-{
-    return Core::ICore::libexecPath()
-            + QStringLiteral("/clangbackend")
-            + QStringLiteral(QTC_HOST_EXE_SUFFIX);
-}
-
-static bool printAliveMessageHelper()
-{
-    const bool print = qEnvironmentVariableIntValue("QTC_CLANG_FORCE_VERBOSE_ALIVE");
-    if (!print) {
-        qCDebug(log) << "Hint: AliveMessage will not be printed. "
-                        "Force it by setting QTC_CLANG_FORCE_VERBOSE_ALIVE=1.";
-    }
-
-    return print;
-}
-
-static bool printAliveMessage()
-{
-    static bool print = log().isDebugEnabled() ? printAliveMessageHelper() : false;
-    return print;
-}
-
-IpcReceiver::IpcReceiver()
-{
-}
-
-IpcReceiver::~IpcReceiver()
-{
-    reset();
-}
-
-void IpcReceiver::setAliveHandler(const IpcReceiver::AliveHandler &handler)
-{
-    m_aliveHandler = handler;
-}
-
-void IpcReceiver::addExpectedCodeCompletedMessage(
-        quint64 ticket,
-        ClangCompletionAssistProcessor *processor)
-{
-    QTC_ASSERT(processor, return);
-    QTC_CHECK(!m_assistProcessorsTable.contains(ticket));
-    m_assistProcessorsTable.insert(ticket, processor);
-}
-
-void IpcReceiver::deleteProcessorsOfEditorWidget(TextEditor::TextEditorWidget *textEditorWidget)
-{
-    QMutableHashIterator<quint64, ClangCompletionAssistProcessor *> it(m_assistProcessorsTable);
-    while (it.hasNext()) {
-        it.next();
-        ClangCompletionAssistProcessor *assistProcessor = it.value();
-        if (assistProcessor->textEditorWidget() == textEditorWidget) {
-            delete assistProcessor;
-            it.remove();
-        }
-    }
-}
-
-QFuture<CppTools::CursorInfo> IpcReceiver::addExpectedReferencesMessage(
-        quint64 ticket,
-        QTextDocument *textDocument,
-        const CppTools::SemanticInfo::LocalUseMap &localUses)
-{
-    QTC_CHECK(textDocument);
-    QTC_CHECK(!m_referencesTable.contains(ticket));
-
-    QFutureInterface<CppTools::CursorInfo> futureInterface;
-    futureInterface.reportStarted();
-
-    const ReferencesEntry entry{futureInterface, textDocument, localUses};
-    m_referencesTable.insert(ticket, entry);
-
-    return futureInterface.future();
-}
-
-QFuture<CppTools::SymbolInfo> IpcReceiver::addExpectedRequestFollowSymbolMessage(quint64 ticket)
-{
-    QTC_CHECK(!m_followTable.contains(ticket));
-
-    QFutureInterface<CppTools::SymbolInfo> futureInterface;
-    futureInterface.reportStarted();
-
-    m_followTable.insert(ticket, futureInterface);
-
-    return futureInterface.future();
-}
-
-bool IpcReceiver::isExpectingCodeCompletedMessage() const
-{
-    return !m_assistProcessorsTable.isEmpty();
-}
-
-void IpcReceiver::reset()
-{
-    // Clean up waiting assist processors
-    qDeleteAll(m_assistProcessorsTable.begin(), m_assistProcessorsTable.end());
-    m_assistProcessorsTable.clear();
-
-    // Clean up futures for references
-    for (ReferencesEntry &entry : m_referencesTable)
-        entry.futureInterface.cancel();
-    m_referencesTable.clear();
-    for (QFutureInterface<CppTools::SymbolInfo> &futureInterface : m_followTable)
-        futureInterface.cancel();
-    m_followTable.clear();
-}
-
-void IpcReceiver::alive()
-{
-    if (printAliveMessage())
-        qCDebug(log) << "<<< AliveMessage";
-    QTC_ASSERT(m_aliveHandler, return);
-    m_aliveHandler();
-}
-
-void IpcReceiver::echo(const EchoMessage &message)
-{
-    qCDebug(log) << "<<<" << message;
-}
-
-void IpcReceiver::codeCompleted(const CodeCompletedMessage &message)
-{
-    qCDebug(log) << "<<< CodeCompletedMessage with" << message.codeCompletions().size() << "items";
-
-    const quint64 ticket = message.ticketNumber();
-    QScopedPointer<ClangCompletionAssistProcessor> processor(m_assistProcessorsTable.take(ticket));
-    if (processor) {
-        processor->handleAvailableCompletions(message.codeCompletions(),
-                                              message.neededCorrection());
-    }
-}
-
-void IpcReceiver::documentAnnotationsChanged(const DocumentAnnotationsChangedMessage &message)
-{
-    qCDebug(log) << "<<< DocumentAnnotationsChangedMessage with"
-                 << message.diagnostics().size() << "diagnostics"
-                 << message.highlightingMarks().size() << "highlighting marks"
-                 << message.skippedPreprocessorRanges().size() << "skipped preprocessor ranges";
-
-    auto processor = ClangEditorDocumentProcessor::get(message.fileContainer().filePath());
-
-    if (processor) {
-        const QString projectPartId = message.fileContainer().projectPartId();
-        const QString filePath = message.fileContainer().filePath();
-        const QString documentProjectPartId = CppTools::CppToolsBridge::projectPartIdForFile(filePath);
-        if (projectPartId == documentProjectPartId) {
-            const quint32 documentRevision = message.fileContainer().documentRevision();
-            processor->updateCodeWarnings(message.diagnostics(),
-                                          message.firstHeaderErrorDiagnostic(),
-                                          documentRevision);
-            processor->updateHighlighting(message.highlightingMarks(),
-                                          message.skippedPreprocessorRanges(),
-                                          documentRevision);
-        }
-    }
-}
-
-static
-CppTools::CursorInfo::Range toCursorInfoRange(const QTextDocument &textDocument,
-                                              const SourceRangeContainer &sourceRange)
-{
-    const SourceLocationContainer start = sourceRange.start();
-    const SourceLocationContainer end = sourceRange.end();
-    const unsigned length = end.column() - start.column();
-
-    const QTextBlock block = textDocument.findBlockByNumber(static_cast<int>(start.line()) - 1);
-    const int shift = ClangCodeModel::Utils::extraUtf8CharsShift(block.text(),
-                                                                 static_cast<int>(start.column()));
-    const uint column = start.column() - static_cast<uint>(shift);
-
-    return CppTools::CursorInfo::Range(start.line(), column, length);
-}
-
-static
-CppTools::CursorInfo toCursorInfo(const QTextDocument &textDocument,
-                                  const CppTools::SemanticInfo::LocalUseMap &localUses,
-                                  const ReferencesMessage &message)
-{
-    CppTools::CursorInfo result;
-    const QVector<SourceRangeContainer> references = message.references();
-
-    result.areUseRangesForLocalVariable = message.isLocalVariable();
-    for (const SourceRangeContainer &reference : references)
-        result.useRanges.append(toCursorInfoRange(textDocument, reference));
-
-    result.useRanges.reserve(references.size());
-    result.localUses = localUses;
-
-    return result;
-}
-
-static
-CppTools::SymbolInfo toSymbolInfo(const FollowSymbolMessage &message)
-{
-    CppTools::SymbolInfo result;
-    const SourceRangeContainer &range = message.sourceRange();
-
-    const SourceLocationContainer start = range.start();
-    const SourceLocationContainer end = range.end();
-    result.startLine = static_cast<int>(start.line());
-    result.startColumn = static_cast<int>(start.column());
-    result.endLine = static_cast<int>(end.line());
-    result.endColumn = static_cast<int>(end.column());
-    result.fileName = start.filePath();
-
-    return result;
-}
-
-void IpcReceiver::references(const ReferencesMessage &message)
-{
-    qCDebug(log) << "<<< ReferencesMessage with"
-                 << message.references().size() << "references";
-
-    const quint64 ticket = message.ticketNumber();
-    const ReferencesEntry entry = m_referencesTable.take(ticket);
-    QFutureInterface<CppTools::CursorInfo> futureInterface = entry.futureInterface;
-    QTC_CHECK(futureInterface != QFutureInterface<CppTools::CursorInfo>());
-
-    if (futureInterface.isCanceled())
-        return; // Editor document closed or a new request was issued making this result outdated.
-
-    QTC_ASSERT(entry.textDocument, return);
-    futureInterface.reportResult(toCursorInfo(*entry.textDocument, entry.localUses, message));
-    futureInterface.reportFinished();
-}
-
-void IpcReceiver::followSymbol(const ClangBackEnd::FollowSymbolMessage &message)
-{
-    qCDebug(log) << "<<< FollowSymbolMessage with"
-                 << message.sourceRange() << "range";
-
-    const quint64 ticket = message.ticketNumber();
-    QFutureInterface<CppTools::SymbolInfo> futureInterface = m_followTable.take(ticket);
-    QTC_CHECK(futureInterface != QFutureInterface<CppTools::SymbolInfo>());
-
-    if (futureInterface.isCanceled())
-        return; // Editor document closed or a new request was issued making this result outdated.
-
-    futureInterface.reportResult(toSymbolInfo(message));
-    futureInterface.reportFinished();
-}
-
-IpcSender::IpcSender(ClangCodeModelConnectionClient *connectionClient)
-    : m_connection(connectionClient)
-{}
-
-void IpcSender::end()
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << ClangBackEnd::EndMessage();
-     m_connection->sendEndMessage();
-}
-
-void IpcSender::registerTranslationUnitsForEditor(const RegisterTranslationUnitForEditorMessage &message)
-{
-     QTC_CHECK(m_connection->isConnected());
-     qCDebug(log) << ">>>" << message;
-     m_connection->serverProxy().registerTranslationUnitsForEditor(message);
-}
-
-void IpcSender::updateTranslationUnitsForEditor(const UpdateTranslationUnitsForEditorMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().updateTranslationUnitsForEditor(message);
-}
-
-void IpcSender::unregisterTranslationUnitsForEditor(const UnregisterTranslationUnitsForEditorMessage &message)
-{
-     QTC_CHECK(m_connection->isConnected());
-     qCDebug(log) << ">>>" << message;
-     m_connection->serverProxy().unregisterTranslationUnitsForEditor(message);
-}
-
-void IpcSender::registerProjectPartsForEditor(const RegisterProjectPartsForEditorMessage &message)
-{
-     QTC_CHECK(m_connection->isConnected());
-     qCDebug(log) << ">>>" << message;
-     m_connection->serverProxy().registerProjectPartsForEditor(message);
-}
-
-void IpcSender::unregisterProjectPartsForEditor(const UnregisterProjectPartsForEditorMessage &message)
-{
-     QTC_CHECK(m_connection->isConnected());
-     qCDebug(log) << ">>>" << message;
-     m_connection->serverProxy().unregisterProjectPartsForEditor(message);
-}
-
-void IpcSender::registerUnsavedFilesForEditor(const RegisterUnsavedFilesForEditorMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().registerUnsavedFilesForEditor(message);
-}
-
-void IpcSender::unregisterUnsavedFilesForEditor(const UnregisterUnsavedFilesForEditorMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().unregisterUnsavedFilesForEditor(message);
-}
-
-void IpcSender::completeCode(const CompleteCodeMessage &message)
-{
-     QTC_CHECK(m_connection->isConnected());
-     qCDebug(log) << ">>>" << message;
-     m_connection->serverProxy().completeCode(message);
-}
-
-void IpcSender::requestDocumentAnnotations(const RequestDocumentAnnotationsMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().requestDocumentAnnotations(message);
-}
-
-void IpcSender::requestReferences(const RequestReferencesMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().requestReferences(message);
-}
-
-void IpcSender::requestFollowSymbol(const RequestFollowSymbolMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().requestFollowSymbol(message);
-}
-
-void IpcSender::updateVisibleTranslationUnits(const UpdateVisibleTranslationUnitsMessage &message)
-{
-    QTC_CHECK(m_connection->isConnected());
-    qCDebug(log) << ">>>" << message;
-    m_connection->serverProxy().updateVisibleTranslationUnits(message);
-}
-
-bool IpcSender::isConnected() const
-{
-    return m_connection && m_connection->isConnected();
-}
-
-class DummyIpcSender : public IpcSender
-{
-public:
-    DummyIpcSender() : IpcSender(nullptr) {}
-
-    void end() override {}
-    void registerTranslationUnitsForEditor(const ClangBackEnd::RegisterTranslationUnitForEditorMessage &) override {}
-    void updateTranslationUnitsForEditor(const ClangBackEnd::UpdateTranslationUnitsForEditorMessage &) override {}
-    void unregisterTranslationUnitsForEditor(const ClangBackEnd::UnregisterTranslationUnitsForEditorMessage &) override {}
-    void registerProjectPartsForEditor(const ClangBackEnd::RegisterProjectPartsForEditorMessage &) override {}
-    void unregisterProjectPartsForEditor(const ClangBackEnd::UnregisterProjectPartsForEditorMessage &) override {}
-    void registerUnsavedFilesForEditor(const ClangBackEnd::RegisterUnsavedFilesForEditorMessage &) override {}
-    void unregisterUnsavedFilesForEditor(const ClangBackEnd::UnregisterUnsavedFilesForEditorMessage &) override {}
-    void completeCode(const ClangBackEnd::CompleteCodeMessage &) override {}
-    void requestDocumentAnnotations(const ClangBackEnd::RequestDocumentAnnotationsMessage &) override {}
-    void requestReferences(const ClangBackEnd::RequestReferencesMessage &) override {}
-    void requestFollowSymbol(const RequestFollowSymbolMessage &) override {}
-    void updateVisibleTranslationUnits(const UpdateVisibleTranslationUnitsMessage &) override {}
-};
-
-enum { backEndStartTimeOutInMs = 10000 };
-
-IpcCommunicator::IpcCommunicator()
-    : m_connection(&m_ipcReceiver)
-    , m_ipcSender(new DummyIpcSender())
-{
-    m_backendStartTimeOut.setSingleShot(true);
-    connect(&m_backendStartTimeOut, &QTimer::timeout,
-            this, &IpcCommunicator::logStartTimeOut);
-
-    m_ipcReceiver.setAliveHandler([this]() { m_connection.resetProcessAliveTimer(); });
-
-    connect(Core::EditorManager::instance(), &Core::EditorManager::editorAboutToClose,
-            this, &IpcCommunicator::onEditorAboutToClose);
-    connect(Core::ICore::instance(), &Core::ICore::coreAboutToClose,
-            this, &IpcCommunicator::setupDummySender);
-
-    initializeBackend();
-}
-
-IpcCommunicator::~IpcCommunicator()
-{
-    disconnect(&m_connection, 0, this, 0);
-}
-
-void IpcCommunicator::initializeBackend()
-{
-    const QString clangBackEndProcessPath = backendProcessPath();
-    if (!QFileInfo(clangBackEndProcessPath).exists()) {
-        logExecutableDoesNotExist();
-        return;
-    }
-    qCDebug(log) << "Starting" << clangBackEndProcessPath;
-
-    m_connection.setProcessAliveTimerInterval(30 * 1000);
-    m_connection.setProcessPath(clangBackEndProcessPath);
-
-    connect(&m_connection, &ConnectionClient::connectedToLocalSocket,
-            this, &IpcCommunicator::onConnectedToBackend);
-    connect(&m_connection, &ConnectionClient::disconnectedFromLocalSocket,
-            this, &IpcCommunicator::setupDummySender);
-
-    m_connection.startProcessAndConnectToServerAsynchronously();
-    m_backendStartTimeOut.start(backEndStartTimeOutInMs);
-}
-
-static QStringList projectPartOptions(const CppTools::ProjectPart::Ptr &projectPart)
-{
-    const QStringList options = ClangCodeModel::Utils::createClangOptions(projectPart,
-        CppTools::ProjectFile::Unsupported); // No language option
-
-    return options;
-}
-
-static ClangBackEnd::ProjectPartContainer toProjectPartContainer(
-        const CppTools::ProjectPart::Ptr &projectPart)
-{
-    const QStringList options = projectPartOptions(projectPart);
-
-    return ClangBackEnd::ProjectPartContainer(projectPart->id(), Utf8StringVector(options));
-}
-
-static QVector<ClangBackEnd::ProjectPartContainer> toProjectPartContainers(
-        const QVector<CppTools::ProjectPart::Ptr> projectParts)
-{
-    QVector<ClangBackEnd::ProjectPartContainer> projectPartContainers;
-    projectPartContainers.reserve(projectParts.size());
-
-    foreach (const CppTools::ProjectPart::Ptr &projectPart, projectParts)
-        projectPartContainers << toProjectPartContainer(projectPart);
-
-    return projectPartContainers;
-}
-
-void IpcCommunicator::registerFallbackProjectPart()
-{
-    const auto projectPart = CppTools::CppModelManager::instance()->fallbackProjectPart();
-    const auto projectPartContainer = toProjectPartContainer(projectPart);
-
-    registerProjectPartsForEditor({projectPartContainer});
-}
-
-namespace {
-Utf8String currentCppEditorDocumentFilePath()
-{
-    Utf8String currentCppEditorDocumentFilePath;
-
-    const auto currentEditor = Core::EditorManager::currentEditor();
-    if (currentEditor && CppTools::CppModelManager::isCppEditor(currentEditor)) {
-        const auto currentDocument = currentEditor->document();
-        if (currentDocument)
-            currentCppEditorDocumentFilePath = currentDocument->filePath().toString();
-    }
-
-    return currentCppEditorDocumentFilePath;
-}
-
-void removeDuplicates(Utf8StringVector &visibleEditorDocumentsFilePaths)
-{
-    std::sort(visibleEditorDocumentsFilePaths.begin(),
-              visibleEditorDocumentsFilePaths.end());
-    const auto end = std::unique(visibleEditorDocumentsFilePaths.begin(),
-                                 visibleEditorDocumentsFilePaths.end());
-    visibleEditorDocumentsFilePaths.erase(end,
-                                          visibleEditorDocumentsFilePaths.end());
-}
-
-void removeNonCppEditors(QList<Core::IEditor*> &visibleEditors)
-{
-    const auto isNotCppEditor = [] (Core::IEditor *editor) {
-        return !CppTools::CppModelManager::isCppEditor(editor);
-    };
-
-    const auto end = std::remove_if(visibleEditors.begin(),
-                                    visibleEditors.end(),
-                                    isNotCppEditor);
-
-    visibleEditors.erase(end, visibleEditors.end());
-}
-
-Utf8StringVector visibleCppEditorDocumentsFilePaths()
-{
-    auto visibleEditors = CppTools::CppToolsBridge::visibleEditors();
-
-    removeNonCppEditors(visibleEditors);
-
-    Utf8StringVector visibleCppEditorDocumentsFilePaths;
-    visibleCppEditorDocumentsFilePaths.reserve(visibleEditors.size());
-
-    const auto editorFilePaths = [] (Core::IEditor *editor) {
-        return Utf8String(editor->document()->filePath().toString());
-    };
-
-    std::transform(visibleEditors.begin(),
-                   visibleEditors.end(),
-                   std::back_inserter(visibleCppEditorDocumentsFilePaths),
-                   editorFilePaths);
-
-    removeDuplicates(visibleCppEditorDocumentsFilePaths);
-
-    return visibleCppEditorDocumentsFilePaths;
-}
-
-}
-
-void IpcCommunicator::updateTranslationUnitVisiblity()
-{
-    updateTranslationUnitVisiblity(currentCppEditorDocumentFilePath(), visibleCppEditorDocumentsFilePaths());
-}
-
-bool IpcCommunicator::isNotWaitingForCompletion() const
-{
-    return !m_ipcReceiver.isExpectingCodeCompletedMessage();
-}
-
-void IpcCommunicator::updateTranslationUnitVisiblity(const Utf8String &currentEditorFilePath,
-                                                     const Utf8StringVector &visibleEditorsFilePaths)
-{
-    const UpdateVisibleTranslationUnitsMessage message(currentEditorFilePath, visibleEditorsFilePaths);
-    m_ipcSender->updateVisibleTranslationUnits(message);
-}
-
-void IpcCommunicator::registerCurrentProjectParts()
-{
-    using namespace CppTools;
-
-    const QList<ProjectInfo> projectInfos = CppModelManager::instance()->projectInfos();
-    foreach (const ProjectInfo &projectInfo, projectInfos)
-        registerProjectsParts(projectInfo.projectParts());
-}
-
-void IpcCommunicator::restoreCppEditorDocuments()
-{
-    resetCppEditorDocumentProcessors();
-    registerVisibleCppEditorDocumentAndMarkInvisibleDirty();
-}
-
-void IpcCommunicator::resetCppEditorDocumentProcessors()
-{
-    using namespace CppTools;
-
-    const auto cppEditorDocuments = CppModelManager::instance()->cppEditorDocuments();
-    foreach (CppEditorDocumentHandle *cppEditorDocument, cppEditorDocuments)
-        cppEditorDocument->resetProcessor();
-}
-
-void IpcCommunicator::registerVisibleCppEditorDocumentAndMarkInvisibleDirty()
-{
-    CppTools::CppModelManager::instance()->updateCppEditorDocuments();
-}
-
-void IpcCommunicator::registerCurrentCodeModelUiHeaders()
-{
-    using namespace CppTools;
-
-    const auto editorSupports = CppModelManager::instance()->abstractEditorSupports();
-    foreach (const AbstractEditorSupport *es, editorSupports) {
-        const QString mappedPath
-                = ModelManagerSupportClang::instance()->dummyUiHeaderOnDiskPath(es->fileName());
-        updateUnsavedFile(mappedPath, es->contents(), es->revision());
-    }
-}
-
-void IpcCommunicator::registerProjectsParts(const QVector<CppTools::ProjectPart::Ptr> projectParts)
-{
-    const auto projectPartContainers = toProjectPartContainers(projectParts);
-    registerProjectPartsForEditor(projectPartContainers);
-}
-
-void IpcCommunicator::updateTranslationUnitFromCppEditorDocument(const QString &filePath)
-{
-    const CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath);
-
-    updateTranslationUnit(filePath, document->contents(), document->revision());
-}
-
-void IpcCommunicator::updateUnsavedFileFromCppEditorDocument(const QString &filePath)
-{
-    const CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath);
-
-    updateUnsavedFile(filePath, document->contents(), document->revision());
-}
-
-namespace {
-
-
-}
-
-void IpcCommunicator::updateTranslationUnit(const QString &filePath,
-                                            const QByteArray &contents,
-                                            uint documentRevision)
-{
-    const bool hasUnsavedContent = true;
-
-    updateTranslationUnitsForEditor({{filePath,
-                                      Utf8String(),
-                                      Utf8String::fromByteArray(contents),
-                                      hasUnsavedContent,
-                                      documentRevision}});
-}
-
-void IpcCommunicator::updateUnsavedFile(const QString &filePath, const QByteArray &contents, uint documentRevision)
-{
-    const bool hasUnsavedContent = true;
-
-    // TODO: Send new only if changed
-    registerUnsavedFilesForEditor({{filePath,
-                                    Utf8String(),
-                                    Utf8String::fromByteArray(contents),
-                                    hasUnsavedContent,
-                                    documentRevision}});
-}
-
-static bool documentHasChanged(const QString &filePath, uint revision)
-{
-    if (CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath))
-        return document->sendTracker().shouldSendRevision(revision);
-
-    return true;
-}
-
-static void setLastSentDocumentRevision(const QString &filePath, uint revision)
-{
-    if (CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath))
-        document->sendTracker().setLastSentRevision(int(revision));
-}
-
-void IpcCommunicator::updateTranslationUnitWithRevisionCheck(const FileContainer &fileContainer)
-{
-    if (documentHasChanged(fileContainer.filePath(), fileContainer.documentRevision())) {
-        updateTranslationUnitsForEditor({fileContainer});
-        setLastSentDocumentRevision(fileContainer.filePath(),
-                                    fileContainer.documentRevision());
-    }
-}
-
-void IpcCommunicator::requestDocumentAnnotations(const FileContainer &fileContainer)
-{
-    const RequestDocumentAnnotationsMessage message(fileContainer);
-    m_ipcSender->requestDocumentAnnotations(message);
-}
-
-QFuture<CppTools::CursorInfo> IpcCommunicator::requestReferences(
-        const FileContainer &fileContainer,
-        quint32 line,
-        quint32 column,
-        QTextDocument *textDocument,
-        const CppTools::SemanticInfo::LocalUseMap &localUses)
-{
-    const RequestReferencesMessage message(fileContainer, line, column);
-    m_ipcSender->requestReferences(message);
-
-    return m_ipcReceiver.addExpectedReferencesMessage(message.ticketNumber(), textDocument,
-                                                      localUses);
-}
-
-QFuture<CppTools::SymbolInfo> IpcCommunicator::requestFollowSymbol(
-        const FileContainer &curFileContainer,
-        const QVector<Utf8String> &dependentFiles,
-        quint32 line,
-        quint32 column)
-{
-    const RequestFollowSymbolMessage message(curFileContainer,
-                                             dependentFiles,
-                                             line,
-                                             column);
-    m_ipcSender->requestFollowSymbol(message);
-
-    return m_ipcReceiver.addExpectedRequestFollowSymbolMessage(message.ticketNumber());
-}
-
-void IpcCommunicator::updateTranslationUnitWithRevisionCheck(Core::IDocument *document)
-{
-    const auto textDocument = qobject_cast<TextDocument*>(document);
-    const auto filePath = textDocument->filePath().toString();
-    const QString projectPartId = CppTools::CppToolsBridge::projectPartIdForFile(filePath);
-
-    updateTranslationUnitWithRevisionCheck(FileContainer(filePath,
-                                                         projectPartId,
-                                                         Utf8StringVector(),
-                                                         textDocument->document()->revision()));
-}
-
-void IpcCommunicator::updateChangeContentStartPosition(const QString &filePath, int position)
-{
-    if (CppTools::CppEditorDocumentHandle *document = ClangCodeModel::Utils::cppDocument(filePath))
-        document->sendTracker().applyContentChange(position);
-}
-
-void IpcCommunicator::updateTranslationUnitIfNotCurrentDocument(Core::IDocument *document)
-{
-    QTC_ASSERT(document, return);
-    if (Core::EditorManager::currentDocument() != document)
-        updateTranslationUnit(document);
-}
-
-void IpcCommunicator::updateTranslationUnit(Core::IDocument *document)
-{
-    updateTranslationUnitFromCppEditorDocument(document->filePath().toString());
-}
-
-void IpcCommunicator::updateUnsavedFile(Core::IDocument *document)
-{
-    QTC_ASSERT(document, return);
-
-     updateUnsavedFileFromCppEditorDocument(document->filePath().toString());
-}
-
-void IpcCommunicator::onConnectedToBackend()
-{
-    m_backendStartTimeOut.stop();
-
-    ++m_connectedCount;
-    if (m_connectedCount > 1)
-        logRestartedDueToUnexpectedFinish();
-
-    m_ipcReceiver.reset();
-    m_ipcSender.reset(new IpcSender(&m_connection));
-
-    initializeBackendWithCurrentData();
-}
-
-void IpcCommunicator::onEditorAboutToClose(Core::IEditor *editor)
-{
-    if (auto *textEditor = qobject_cast<TextEditor::BaseTextEditor *>(editor))
-        m_ipcReceiver.deleteProcessorsOfEditorWidget(textEditor->editorWidget());
-}
-
-void IpcCommunicator::setupDummySender()
-{
-    m_ipcSender.reset(new DummyIpcSender);
-}
-
-void IpcCommunicator::logExecutableDoesNotExist()
-{
-    const QString msg
-        = tr("Clang Code Model: Error: "
-             "The clangbackend executable \"%1\" does not exist.")
-                .arg(QDir::toNativeSeparators(backendProcessPath()));
-
-    logError(msg);
-}
-
-void IpcCommunicator::logStartTimeOut()
-{
-    const QString msg
-        = tr("Clang Code Model: Error: "
-             "The clangbackend executable \"%1\" could not be started (timeout after %2ms).")
-                .arg(QDir::toNativeSeparators(backendProcessPath()))
-                .arg(backEndStartTimeOutInMs);
-
-    logError(msg);
-}
-
-void IpcCommunicator::logRestartedDueToUnexpectedFinish()
-{
-    const QString msg
-        = tr("Clang Code Model: Error: "
-             "The clangbackend process has finished unexpectedly and was restarted.");
-
-    logError(msg);
-}
-
-void IpcCommunicator::logError(const QString &text)
-{
-    const QString textWithTimestamp = QDateTime::currentDateTime().toString(Qt::ISODate)
-            + ' ' + text;
-    Core::MessageManager::write(textWithTimestamp, Core::MessageManager::Flash);
-    qWarning("%s", qPrintable(textWithTimestamp));
-}
-
-void IpcCommunicator::initializeBackendWithCurrentData()
-{
-    registerFallbackProjectPart();
-    registerCurrentProjectParts();
-    registerCurrentCodeModelUiHeaders();
-    restoreCppEditorDocuments();
-    updateTranslationUnitVisiblity();
-
-    emit backendReinitialized();
-}
-
-IpcSender *IpcCommunicator::setIpcSender(IpcSender *ipcSender)
-{
-    IpcSender *previousMessageSender = m_ipcSender.take();
-    m_ipcSender.reset(ipcSender);
-    return previousMessageSender;
-}
-
-void IpcCommunicator::killBackendProcess()
-{
-    m_connection.processForTestOnly()->kill();
-}
-
-void IpcCommunicator::registerTranslationUnitsForEditor(const FileContainers &fileContainers)
-{
-    const RegisterTranslationUnitForEditorMessage message(fileContainers,
-                                                          currentCppEditorDocumentFilePath(),
-                                                          visibleCppEditorDocumentsFilePaths());
-    m_ipcSender->registerTranslationUnitsForEditor(message);
-}
-
-void IpcCommunicator::updateTranslationUnitsForEditor(const IpcCommunicator::FileContainers &fileContainers)
-{
-    const UpdateTranslationUnitsForEditorMessage message(fileContainers);
-    m_ipcSender->updateTranslationUnitsForEditor(message);
-}
-
-void IpcCommunicator::unregisterTranslationUnitsForEditor(const FileContainers &fileContainers)
-{
-    const UnregisterTranslationUnitsForEditorMessage message(fileContainers);
-    m_ipcSender->unregisterTranslationUnitsForEditor(message);
-}
-
-void IpcCommunicator::registerProjectPartsForEditor(
-        const ProjectPartContainers &projectPartContainers)
-{
-    const RegisterProjectPartsForEditorMessage message(projectPartContainers);
-    m_ipcSender->registerProjectPartsForEditor(message);
-}
-
-void IpcCommunicator::unregisterProjectPartsForEditor(const QStringList &projectPartIds)
-{
-    const UnregisterProjectPartsForEditorMessage message((Utf8StringVector(projectPartIds)));
-    m_ipcSender->unregisterProjectPartsForEditor(message);
-}
-
-void IpcCommunicator::registerUnsavedFilesForEditor(const IpcCommunicator::FileContainers &fileContainers)
-{
-    const RegisterUnsavedFilesForEditorMessage message(fileContainers);
-    m_ipcSender->registerUnsavedFilesForEditor(message);
-}
-
-void IpcCommunicator::unregisterUnsavedFilesForEditor(const IpcCommunicator::FileContainers &fileContainers)
-{
-    const UnregisterUnsavedFilesForEditorMessage message(fileContainers);
-    m_ipcSender->unregisterUnsavedFilesForEditor(message);
-}
-
-void IpcCommunicator::completeCode(ClangCompletionAssistProcessor *assistProcessor,
-                                   const QString &filePath,
-                                   quint32 line,
-                                   quint32 column,
-                                   const QString &projectFilePath,
-                                   qint32 funcNameStartLine,
-                                   qint32 funcNameStartColumn)
-{
-    const CompleteCodeMessage message(filePath, line, column, projectFilePath, funcNameStartLine,
-                                      funcNameStartColumn);
-    m_ipcSender->completeCode(message);
-    m_ipcReceiver.addExpectedCodeCompletedMessage(message.ticketNumber(), assistProcessor);
-}
diff --git a/src/plugins/clangcodemodel/clangbackendlogging.cpp b/src/plugins/clangcodemodel/clangbackendlogging.cpp
new file mode 100644
index 00000000000..47118ca22d5
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendlogging.cpp
@@ -0,0 +1,34 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#include "clangbackendlogging.h"
+
+namespace ClangCodeModel {
+namespace Internal {
+
+Q_LOGGING_CATEGORY(ipcLog, "qtc.clangcodemodel.ipc")
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangbackendlogging.h b/src/plugins/clangcodemodel/clangbackendlogging.h
new file mode 100644
index 00000000000..6e2e3ec6893
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendlogging.h
@@ -0,0 +1,35 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QLoggingCategory>
+
+namespace ClangCodeModel { namespace Internal {
+
+Q_DECLARE_LOGGING_CATEGORY(ipcLog)
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangbackendreceiver.cpp b/src/plugins/clangcodemodel/clangbackendreceiver.cpp
new file mode 100644
index 00000000000..9d620d6697d
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendreceiver.cpp
@@ -0,0 +1,287 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#include "clangbackendreceiver.h"
+
+#include "clangbackendlogging.h"
+
+#include "clangcompletionassistprocessor.h"
+#include "clangeditordocumentprocessor.h"
+
+#include <cpptools/cpptoolsbridge.h>
+
+#include <clangsupport/clangcodemodelclientmessages.h>
+
+#include <QLoggingCategory>
+#include <QTextBlock>
+
+#include <utils/qtcassert.h>
+
+static Q_LOGGING_CATEGORY(log, "qtc.clangcodemodel.ipc")
+
+using namespace ClangBackEnd;
+
+namespace ClangCodeModel {
+namespace Internal {
+
+static bool printAliveMessageHelper()
+{
+    const bool print = qEnvironmentVariableIntValue("QTC_CLANG_FORCE_VERBOSE_ALIVE");
+    if (!print) {
+        qCDebug(log) << "Hint: AliveMessage will not be printed. "
+                        "Force it by setting QTC_CLANG_FORCE_VERBOSE_ALIVE=1.";
+    }
+
+    return print;
+}
+
+static bool printAliveMessage()
+{
+    static bool print = log().isDebugEnabled() ? printAliveMessageHelper() : false;
+    return print;
+}
+
+BackendReceiver::BackendReceiver()
+{
+}
+
+BackendReceiver::~BackendReceiver()
+{
+    reset();
+}
+
+void BackendReceiver::setAliveHandler(const BackendReceiver::AliveHandler &handler)
+{
+    m_aliveHandler = handler;
+}
+
+void BackendReceiver::addExpectedCodeCompletedMessage(
+        quint64 ticket,
+        ClangCompletionAssistProcessor *processor)
+{
+    QTC_ASSERT(processor, return);
+    QTC_CHECK(!m_assistProcessorsTable.contains(ticket));
+    m_assistProcessorsTable.insert(ticket, processor);
+}
+
+void BackendReceiver::deleteProcessorsOfEditorWidget(TextEditor::TextEditorWidget *textEditorWidget)
+{
+    QMutableHashIterator<quint64, ClangCompletionAssistProcessor *> it(m_assistProcessorsTable);
+    while (it.hasNext()) {
+        it.next();
+        ClangCompletionAssistProcessor *assistProcessor = it.value();
+        if (assistProcessor->textEditorWidget() == textEditorWidget) {
+            delete assistProcessor;
+            it.remove();
+        }
+    }
+}
+
+QFuture<CppTools::CursorInfo> BackendReceiver::addExpectedReferencesMessage(
+        quint64 ticket,
+        QTextDocument *textDocument,
+        const CppTools::SemanticInfo::LocalUseMap &localUses)
+{
+    QTC_CHECK(textDocument);
+    QTC_CHECK(!m_referencesTable.contains(ticket));
+
+    QFutureInterface<CppTools::CursorInfo> futureInterface;
+    futureInterface.reportStarted();
+
+    const ReferencesEntry entry{futureInterface, textDocument, localUses};
+    m_referencesTable.insert(ticket, entry);
+
+    return futureInterface.future();
+}
+
+QFuture<CppTools::SymbolInfo> BackendReceiver::addExpectedRequestFollowSymbolMessage(quint64 ticket)
+{
+    QTC_CHECK(!m_followTable.contains(ticket));
+
+    QFutureInterface<CppTools::SymbolInfo> futureInterface;
+    futureInterface.reportStarted();
+
+    m_followTable.insert(ticket, futureInterface);
+
+    return futureInterface.future();
+}
+
+bool BackendReceiver::isExpectingCodeCompletedMessage() const
+{
+    return !m_assistProcessorsTable.isEmpty();
+}
+
+void BackendReceiver::reset()
+{
+    // Clean up waiting assist processors
+    qDeleteAll(m_assistProcessorsTable.begin(), m_assistProcessorsTable.end());
+    m_assistProcessorsTable.clear();
+
+    // Clean up futures for references
+    for (ReferencesEntry &entry : m_referencesTable)
+        entry.futureInterface.cancel();
+    m_referencesTable.clear();
+    for (QFutureInterface<CppTools::SymbolInfo> &futureInterface : m_followTable)
+        futureInterface.cancel();
+    m_followTable.clear();
+}
+
+void BackendReceiver::alive()
+{
+    if (printAliveMessage())
+        qCDebug(log) << "<<< AliveMessage";
+    QTC_ASSERT(m_aliveHandler, return);
+    m_aliveHandler();
+}
+
+void BackendReceiver::echo(const EchoMessage &message)
+{
+    qCDebug(log) << "<<<" << message;
+}
+
+void BackendReceiver::codeCompleted(const CodeCompletedMessage &message)
+{
+    qCDebug(log) << "<<< CodeCompletedMessage with" << message.codeCompletions().size() << "items";
+
+    const quint64 ticket = message.ticketNumber();
+    QScopedPointer<ClangCompletionAssistProcessor> processor(m_assistProcessorsTable.take(ticket));
+    if (processor) {
+        processor->handleAvailableCompletions(message.codeCompletions(),
+                                              message.neededCorrection());
+    }
+}
+
+void BackendReceiver::documentAnnotationsChanged(const DocumentAnnotationsChangedMessage &message)
+{
+    qCDebug(log) << "<<< DocumentAnnotationsChangedMessage with"
+                 << message.diagnostics().size() << "diagnostics"
+                 << message.highlightingMarks().size() << "highlighting marks"
+                 << message.skippedPreprocessorRanges().size() << "skipped preprocessor ranges";
+
+    auto processor = ClangEditorDocumentProcessor::get(message.fileContainer().filePath());
+
+    if (processor) {
+        const QString projectPartId = message.fileContainer().projectPartId();
+        const QString filePath = message.fileContainer().filePath();
+        const QString documentProjectPartId = CppTools::CppToolsBridge::projectPartIdForFile(filePath);
+        if (projectPartId == documentProjectPartId) {
+            const quint32 documentRevision = message.fileContainer().documentRevision();
+            processor->updateCodeWarnings(message.diagnostics(),
+                                          message.firstHeaderErrorDiagnostic(),
+                                          documentRevision);
+            processor->updateHighlighting(message.highlightingMarks(),
+                                          message.skippedPreprocessorRanges(),
+                                          documentRevision);
+        }
+    }
+}
+
+static
+CppTools::CursorInfo::Range toCursorInfoRange(const QTextDocument &textDocument,
+                                              const SourceRangeContainer &sourceRange)
+{
+    const SourceLocationContainer start = sourceRange.start();
+    const SourceLocationContainer end = sourceRange.end();
+    const unsigned length = end.column() - start.column();
+
+    const QTextBlock block = textDocument.findBlockByNumber(static_cast<int>(start.line()) - 1);
+    const int shift = ClangCodeModel::Utils::extraUtf8CharsShift(block.text(),
+                                                                 static_cast<int>(start.column()));
+    const uint column = start.column() - static_cast<uint>(shift);
+
+    return CppTools::CursorInfo::Range(start.line(), column, length);
+}
+
+static
+CppTools::CursorInfo toCursorInfo(const QTextDocument &textDocument,
+                                  const CppTools::SemanticInfo::LocalUseMap &localUses,
+                                  const ReferencesMessage &message)
+{
+    CppTools::CursorInfo result;
+    const QVector<SourceRangeContainer> references = message.references();
+
+    result.areUseRangesForLocalVariable = message.isLocalVariable();
+    for (const SourceRangeContainer &reference : references)
+        result.useRanges.append(toCursorInfoRange(textDocument, reference));
+
+    result.useRanges.reserve(references.size());
+    result.localUses = localUses;
+
+    return result;
+}
+
+static
+CppTools::SymbolInfo toSymbolInfo(const FollowSymbolMessage &message)
+{
+    CppTools::SymbolInfo result;
+    const SourceRangeContainer &range = message.sourceRange();
+
+    const SourceLocationContainer start = range.start();
+    const SourceLocationContainer end = range.end();
+    result.startLine = static_cast<int>(start.line());
+    result.startColumn = static_cast<int>(start.column());
+    result.endLine = static_cast<int>(end.line());
+    result.endColumn = static_cast<int>(end.column());
+    result.fileName = start.filePath();
+
+    return result;
+}
+
+void BackendReceiver::references(const ReferencesMessage &message)
+{
+    qCDebug(log) << "<<< ReferencesMessage with"
+                 << message.references().size() << "references";
+
+    const quint64 ticket = message.ticketNumber();
+    const ReferencesEntry entry = m_referencesTable.take(ticket);
+    QFutureInterface<CppTools::CursorInfo> futureInterface = entry.futureInterface;
+    QTC_CHECK(futureInterface != QFutureInterface<CppTools::CursorInfo>());
+
+    if (futureInterface.isCanceled())
+        return; // Editor document closed or a new request was issued making this result outdated.
+
+    QTC_ASSERT(entry.textDocument, return);
+    futureInterface.reportResult(toCursorInfo(*entry.textDocument, entry.localUses, message));
+    futureInterface.reportFinished();
+}
+
+void BackendReceiver::followSymbol(const ClangBackEnd::FollowSymbolMessage &message)
+{
+    qCDebug(log) << "<<< FollowSymbolMessage with"
+                 << message.sourceRange() << "range";
+
+    const quint64 ticket = message.ticketNumber();
+    QFutureInterface<CppTools::SymbolInfo> futureInterface = m_followTable.take(ticket);
+    QTC_CHECK(futureInterface != QFutureInterface<CppTools::SymbolInfo>());
+
+    if (futureInterface.isCanceled())
+        return; // Editor document closed or a new request was issued making this result outdated.
+
+    futureInterface.reportResult(toSymbolInfo(message));
+    futureInterface.reportFinished();
+}
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangbackendreceiver.h b/src/plugins/clangcodemodel/clangbackendreceiver.h
new file mode 100644
index 00000000000..d67db732239
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendreceiver.h
@@ -0,0 +1,96 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <cpptools/cppcursorinfo.h>
+#include <cpptools/cppsymbolinfo.h>
+
+#include <clangsupport/clangcodemodelclientinterface.h>
+
+#include <QFuture>
+#include <QPointer>
+#include <QTextDocument>
+
+namespace TextEditor { class TextEditorWidget; }
+
+namespace ClangCodeModel {
+namespace Internal {
+
+class ClangCompletionAssistProcessor;
+
+class BackendReceiver : public ClangBackEnd::ClangCodeModelClientInterface
+{
+public:
+    BackendReceiver();
+    ~BackendReceiver() override;
+
+    using AliveHandler = std::function<void ()>;
+    void setAliveHandler(const AliveHandler &handler);
+
+    void addExpectedCodeCompletedMessage(quint64 ticket, ClangCompletionAssistProcessor *processor);
+    void deleteProcessorsOfEditorWidget(TextEditor::TextEditorWidget *textEditorWidget);
+
+    QFuture<CppTools::CursorInfo>
+    addExpectedReferencesMessage(quint64 ticket,
+                                 QTextDocument *textDocument,
+                                 const CppTools::SemanticInfo::LocalUseMap &localUses);
+    QFuture<CppTools::SymbolInfo> addExpectedRequestFollowSymbolMessage(quint64 ticket);
+    bool isExpectingCodeCompletedMessage() const;
+
+    void reset();
+
+private:
+    void alive() override;
+    void echo(const ClangBackEnd::EchoMessage &message) override;
+    void codeCompleted(const ClangBackEnd::CodeCompletedMessage &message) override;
+
+    void documentAnnotationsChanged(const ClangBackEnd::DocumentAnnotationsChangedMessage &message) override;
+    void references(const ClangBackEnd::ReferencesMessage &message) override;
+    void followSymbol(const ClangBackEnd::FollowSymbolMessage &message) override;
+
+private:
+    AliveHandler m_aliveHandler;
+    QHash<quint64, ClangCompletionAssistProcessor *> m_assistProcessorsTable;
+
+    struct ReferencesEntry {
+        ReferencesEntry() = default;
+        ReferencesEntry(QFutureInterface<CppTools::CursorInfo> futureInterface,
+                        QTextDocument *textDocument,
+                        const CppTools::SemanticInfo::LocalUseMap &localUses)
+            : futureInterface(futureInterface)
+            , textDocument(textDocument)
+            , localUses(localUses) {}
+        QFutureInterface<CppTools::CursorInfo> futureInterface;
+        QPointer<QTextDocument> textDocument;
+        CppTools::SemanticInfo::LocalUseMap localUses;
+    };
+    QHash<quint64, ReferencesEntry> m_referencesTable;
+
+    QHash<quint64, QFutureInterface<CppTools::SymbolInfo>> m_followTable;
+};
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangbackendsender.cpp b/src/plugins/clangcodemodel/clangbackendsender.cpp
new file mode 100644
index 00000000000..b43b5dee4e2
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendsender.cpp
@@ -0,0 +1,141 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#include "clangbackendsender.h"
+
+#include "clangbackendlogging.h"
+
+#include <clangsupport/clangcodemodelconnectionclient.h>
+#include <clangsupport/clangcodemodelservermessages.h>
+
+#include <utils/qtcassert.h>
+
+using namespace ClangBackEnd;
+
+namespace ClangCodeModel {
+namespace Internal {
+
+BackendSender::BackendSender(ClangCodeModelConnectionClient *connectionClient)
+    : m_connection(connectionClient)
+{}
+
+void BackendSender::end()
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << ClangBackEnd::EndMessage();
+     m_connection->sendEndMessage();
+}
+
+void BackendSender::registerTranslationUnitsForEditor(const RegisterTranslationUnitForEditorMessage &message)
+{
+     QTC_CHECK(m_connection->isConnected());
+     qCDebug(ipcLog) << ">>>" << message;
+     m_connection->serverProxy().registerTranslationUnitsForEditor(message);
+}
+
+void BackendSender::updateTranslationUnitsForEditor(const UpdateTranslationUnitsForEditorMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().updateTranslationUnitsForEditor(message);
+}
+
+void BackendSender::unregisterTranslationUnitsForEditor(const UnregisterTranslationUnitsForEditorMessage &message)
+{
+     QTC_CHECK(m_connection->isConnected());
+     qCDebug(ipcLog) << ">>>" << message;
+     m_connection->serverProxy().unregisterTranslationUnitsForEditor(message);
+}
+
+void BackendSender::registerProjectPartsForEditor(const RegisterProjectPartsForEditorMessage &message)
+{
+     QTC_CHECK(m_connection->isConnected());
+     qCDebug(ipcLog) << ">>>" << message;
+     m_connection->serverProxy().registerProjectPartsForEditor(message);
+}
+
+void BackendSender::unregisterProjectPartsForEditor(const UnregisterProjectPartsForEditorMessage &message)
+{
+     QTC_CHECK(m_connection->isConnected());
+     qCDebug(ipcLog) << ">>>" << message;
+     m_connection->serverProxy().unregisterProjectPartsForEditor(message);
+}
+
+void BackendSender::registerUnsavedFilesForEditor(const RegisterUnsavedFilesForEditorMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().registerUnsavedFilesForEditor(message);
+}
+
+void BackendSender::unregisterUnsavedFilesForEditor(const UnregisterUnsavedFilesForEditorMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().unregisterUnsavedFilesForEditor(message);
+}
+
+void BackendSender::completeCode(const CompleteCodeMessage &message)
+{
+     QTC_CHECK(m_connection->isConnected());
+     qCDebug(ipcLog) << ">>>" << message;
+     m_connection->serverProxy().completeCode(message);
+}
+
+void BackendSender::requestDocumentAnnotations(const RequestDocumentAnnotationsMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().requestDocumentAnnotations(message);
+}
+
+void BackendSender::requestReferences(const RequestReferencesMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().requestReferences(message);
+}
+
+void BackendSender::requestFollowSymbol(const RequestFollowSymbolMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().requestFollowSymbol(message);
+}
+
+void BackendSender::updateVisibleTranslationUnits(const UpdateVisibleTranslationUnitsMessage &message)
+{
+    QTC_CHECK(m_connection->isConnected());
+    qCDebug(ipcLog) << ">>>" << message;
+    m_connection->serverProxy().updateVisibleTranslationUnits(message);
+}
+
+bool BackendSender::isConnected() const
+{
+    return m_connection && m_connection->isConnected();
+}
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangbackendsender.h b/src/plugins/clangcodemodel/clangbackendsender.h
new file mode 100644
index 00000000000..ca9238ae651
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangbackendsender.h
@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <clangsupport/clangcodemodelserverinterface.h>
+
+namespace ClangBackEnd { class ClangCodeModelConnectionClient; }
+
+namespace ClangCodeModel {
+namespace Internal {
+
+class BackendSender : public ClangBackEnd::ClangCodeModelServerInterface
+{
+public:
+    BackendSender(ClangBackEnd::ClangCodeModelConnectionClient *connectionClient);
+
+    void end() override;
+    void registerTranslationUnitsForEditor(const ClangBackEnd::RegisterTranslationUnitForEditorMessage &message) override;
+    void updateTranslationUnitsForEditor(const ClangBackEnd::UpdateTranslationUnitsForEditorMessage &message) override;
+    void unregisterTranslationUnitsForEditor(const ClangBackEnd::UnregisterTranslationUnitsForEditorMessage &message) override;
+    void registerProjectPartsForEditor(const ClangBackEnd::RegisterProjectPartsForEditorMessage &message) override;
+    void unregisterProjectPartsForEditor(const ClangBackEnd::UnregisterProjectPartsForEditorMessage &message) override;
+    void registerUnsavedFilesForEditor(const ClangBackEnd::RegisterUnsavedFilesForEditorMessage &message) override;
+    void unregisterUnsavedFilesForEditor(const ClangBackEnd::UnregisterUnsavedFilesForEditorMessage &message) override;
+    void completeCode(const ClangBackEnd::CompleteCodeMessage &message) override;
+    void requestDocumentAnnotations(const ClangBackEnd::RequestDocumentAnnotationsMessage &message) override;
+    void requestReferences(const ClangBackEnd::RequestReferencesMessage &message) override;
+    void requestFollowSymbol(const ClangBackEnd::RequestFollowSymbolMessage &message) override;
+    void updateVisibleTranslationUnits(const ClangBackEnd::UpdateVisibleTranslationUnitsMessage &message) override;
+
+private:
+    bool isConnected() const;
+
+private:
+    ClangBackEnd::ClangCodeModelConnectionClient *m_connection = nullptr;
+};
+
+} // namespace Internal
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangcodemodel.pro b/src/plugins/clangcodemodel/clangcodemodel.pro
index d48ce960ded..9f632dd4642 100644
--- a/src/plugins/clangcodemodel/clangcodemodel.pro
+++ b/src/plugins/clangcodemodel/clangcodemodel.pro
@@ -9,7 +9,10 @@ SOURCES += \
     clangassistproposal.cpp \
     clangassistproposalitem.cpp \
     clangassistproposalmodel.cpp \
-    clangbackendipcintegration.cpp \
+    clangbackendcommunicator.cpp \
+    clangbackendlogging.cpp \
+    clangbackendreceiver.cpp \
+    clangbackendsender.cpp \
     clangcodemodelplugin.cpp \
     clangcompletionassistinterface.cpp \
     clangcompletionassistprocessor.cpp \
@@ -40,7 +43,10 @@ HEADERS += \
     clangassistproposal.h \
     clangassistproposalitem.h \
     clangassistproposalmodel.h \
-    clangbackendipcintegration.h \
+    clangbackendcommunicator.h \
+    clangbackendlogging.h \
+    clangbackendreceiver.h \
+    clangbackendsender.h \
     clangcodemodelplugin.h \
     clangcompletionassistinterface.h \
     clangcompletionassistprocessor.h \
diff --git a/src/plugins/clangcodemodel/clangcodemodel.qbs b/src/plugins/clangcodemodel/clangcodemodel.qbs
index 699e5730329..cfee39fdbfe 100644
--- a/src/plugins/clangcodemodel/clangcodemodel.qbs
+++ b/src/plugins/clangcodemodel/clangcodemodel.qbs
@@ -41,8 +41,14 @@ QtcPlugin {
         "clangassistproposalitem.h",
         "clangassistproposalmodel.cpp",
         "clangassistproposalmodel.h",
-        "clangbackendipcintegration.cpp",
-        "clangbackendipcintegration.h",
+        "clangbackendcommunicator.cpp",
+        "clangbackendcommunicator.h",
+        "clangbackendlogging.cpp",
+        "clangbackendlogging.h",
+        "clangbackendreceiver.cpp",
+        "clangbackendreceiver.h",
+        "clangbackendsender.cpp",
+        "clangbackendsender.h",
         "clangcodemodelplugin.cpp",
         "clangcodemodelplugin.h",
         "clangcodemodel.qrc",
diff --git a/src/plugins/clangcodemodel/clangcompletionassistinterface.cpp b/src/plugins/clangcodemodel/clangcompletionassistinterface.cpp
index 57e2cbcdf1a..0f5ec7bc1df 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistinterface.cpp
+++ b/src/plugins/clangcodemodel/clangcompletionassistinterface.cpp
@@ -31,7 +31,7 @@ namespace ClangCodeModel {
 namespace Internal {
 
 ClangCompletionAssistInterface::ClangCompletionAssistInterface(
-        IpcCommunicator &ipcCommunicator,
+        BackendCommunicator &communicator,
         const TextEditor::TextEditorWidget *textEditorWidget,
         int position,
         const QString &fileName,
@@ -39,7 +39,7 @@ ClangCompletionAssistInterface::ClangCompletionAssistInterface(
         const CppTools::ProjectPartHeaderPaths &headerPaths,
         const CPlusPlus::LanguageFeatures &features)
     : AssistInterface(textEditorWidget->document(), position, fileName, reason)
-    , m_ipcCommunicator(ipcCommunicator)
+    , m_communicator(communicator)
     , m_headerPaths(headerPaths)
     , m_languageFeatures(features)
     , m_textEditorWidget(textEditorWidget)
@@ -71,9 +71,9 @@ const TextEditor::TextEditorWidget *ClangCompletionAssistInterface::textEditorWi
     return m_textEditorWidget;
 }
 
-IpcCommunicator &ClangCompletionAssistInterface::ipcCommunicator() const
+BackendCommunicator &ClangCompletionAssistInterface::communicator() const
 {
-    return m_ipcCommunicator;
+    return m_communicator;
 }
 
 } // namespace Internal
diff --git a/src/plugins/clangcodemodel/clangcompletionassistinterface.h b/src/plugins/clangcodemodel/clangcompletionassistinterface.h
index fc0724777e0..df198d8fcf5 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistinterface.h
+++ b/src/plugins/clangcodemodel/clangcompletionassistinterface.h
@@ -25,7 +25,7 @@
 
 #pragma once
 
-#include "clangbackendipcintegration.h"
+#include "clangbackendcommunicator.h"
 #include "clangutils.h"
 
 #include <texteditor/codeassist/assistinterface.h>
@@ -36,7 +36,7 @@ namespace Internal {
 class ClangCompletionAssistInterface: public TextEditor::AssistInterface
 {
 public:
-    ClangCompletionAssistInterface(IpcCommunicator &ipcCommunicator,
+    ClangCompletionAssistInterface(BackendCommunicator &communicator,
                                    const TextEditor::TextEditorWidget *textEditorWidget,
                                    int position,
                                    const QString &fileName,
@@ -44,7 +44,7 @@ public:
                                    const CppTools::ProjectPartHeaderPaths &headerPaths,
                                    const CPlusPlus::LanguageFeatures &features);
 
-    IpcCommunicator &ipcCommunicator() const;
+    BackendCommunicator &communicator() const;
     bool objcEnabled() const;
     const CppTools::ProjectPartHeaderPaths &headerPaths() const;
     CPlusPlus::LanguageFeatures languageFeatures() const;
@@ -53,7 +53,7 @@ public:
     void setHeaderPaths(const CppTools::ProjectPartHeaderPaths &headerPaths); // For tests
 
 private:
-    IpcCommunicator &m_ipcCommunicator;
+    BackendCommunicator &m_communicator;
     QStringList m_options;
     CppTools::ProjectPartHeaderPaths m_headerPaths;
     CPlusPlus::LanguageFeatures m_languageFeatures;
diff --git a/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp b/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
index e60ac37ec6c..54d960ff03c 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
+++ b/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
@@ -495,12 +495,12 @@ void ClangCompletionAssistProcessor::sendFileContent(const QByteArray &customFil
     // TODO: Revert custom modification after the completions
     const UnsavedFileContentInfo info = unsavedFileContent(customFileContent);
 
-    IpcCommunicator &ipcCommunicator = m_interface->ipcCommunicator();
-    ipcCommunicator.updateTranslationUnitsForEditor({{m_interface->fileName(),
-                                                      Utf8String(),
-                                                      Utf8String::fromByteArray(info.unsavedContent),
-                                                      info.isDocumentModified,
-                                                      uint(m_interface->textDocument()->revision())}});
+    BackendCommunicator &communicator = m_interface->communicator();
+    communicator.updateTranslationUnitsForEditor({{m_interface->fileName(),
+                                                   Utf8String(),
+                                                   Utf8String::fromByteArray(info.unsavedContent),
+                                                   info.isDocumentModified,
+                                                   uint(m_interface->textDocument()->revision())}});
 }
 namespace {
 bool shouldSendDocumentForCompletion(const QString &filePath,
@@ -568,10 +568,9 @@ bool ClangCompletionAssistProcessor::sendCompletionRequest(int position,
 {
     const QString filePath = m_interface->fileName();
 
-    auto &ipcCommunicator = m_interface->ipcCommunicator();
+    auto &communicator = m_interface->communicator();
 
-    if (shouldSendCodeCompletion(filePath, position)
-            || ipcCommunicator.isNotWaitingForCompletion()) {
+    if (shouldSendCodeCompletion(filePath, position) || communicator.isNotWaitingForCompletion()) {
         if (shouldSendDocumentForCompletion(filePath, position)) {
             sendFileContent(customFileContent);
             setLastDocumentRevision(filePath);
@@ -580,9 +579,9 @@ bool ClangCompletionAssistProcessor::sendCompletionRequest(int position,
         const Position cursorPosition = extractLineColumn(position);
         const Position functionNameStart = extractLineColumn(functionNameStartPosition);
         const QString projectPartId = CppTools::CppToolsBridge::projectPartIdForFile(filePath);
-        ipcCommunicator.completeCode(this, filePath, uint(cursorPosition.line),
-                                     uint(cursorPosition.column), projectPartId,
-                                     functionNameStart.line, functionNameStart.column);
+        communicator.completeCode(this, filePath, uint(cursorPosition.line),
+                                  uint(cursorPosition.column), projectPartId,
+                                  functionNameStart.line, functionNameStart.column);
         setLastCompletionPosition(filePath, position);
         return true;
     }
diff --git a/src/plugins/clangcodemodel/clangcompletionassistprovider.cpp b/src/plugins/clangcodemodel/clangcompletionassistprovider.cpp
index 99abf8ab257..64b97957e74 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistprovider.cpp
+++ b/src/plugins/clangcodemodel/clangcompletionassistprovider.cpp
@@ -43,8 +43,8 @@
 namespace ClangCodeModel {
 namespace Internal {
 
-ClangCompletionAssistProvider::ClangCompletionAssistProvider(IpcCommunicator &ipcCommunicator)
-    : m_ipcCommunicator(ipcCommunicator)
+ClangCompletionAssistProvider::ClangCompletionAssistProvider(BackendCommunicator &communicator)
+    : m_communicator(communicator)
 {
 }
 
@@ -67,7 +67,7 @@ TextEditor::AssistInterface *ClangCompletionAssistProvider::createAssistInterfac
 {
     const CppTools::ProjectPart::Ptr projectPart = Utils::projectPartForFileBasedOnProcessor(filePath);
     if (projectPart) {
-        return new ClangCompletionAssistInterface(m_ipcCommunicator,
+        return new ClangCompletionAssistInterface(m_communicator,
                                                   textEditorWidget,
                                                   position,
                                                   filePath,
diff --git a/src/plugins/clangcodemodel/clangcompletionassistprovider.h b/src/plugins/clangcodemodel/clangcompletionassistprovider.h
index 7c1ac168be2..12139b35d77 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistprovider.h
+++ b/src/plugins/clangcodemodel/clangcompletionassistprovider.h
@@ -25,7 +25,7 @@
 
 #pragma once
 
-#include "clangbackendipcintegration.h"
+#include "clangbackendcommunicator.h"
 
 #include <cpptools/cppcompletionassistprovider.h>
 
@@ -39,7 +39,7 @@ class ClangCompletionAssistProvider : public CppTools::CppCompletionAssistProvid
     Q_OBJECT
 
 public:
-    ClangCompletionAssistProvider(IpcCommunicator &ipcCommunicator);
+    ClangCompletionAssistProvider(BackendCommunicator &communicator);
 
     IAssistProvider::RunType runType() const override;
 
@@ -52,7 +52,7 @@ public:
             TextEditor::AssistReason reason) const override;
 
 private:
-    IpcCommunicator &m_ipcCommunicator;
+    BackendCommunicator &m_communicator;
 };
 
 } // namespace Internal
diff --git a/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp b/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
index 81053cef60e..3d2f2f5267e 100644
--- a/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
+++ b/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
@@ -25,7 +25,7 @@
 
 #include "clangeditordocumentprocessor.h"
 
-#include "clangbackendipcintegration.h"
+#include "clangbackendcommunicator.h"
 #include "clangdiagnostictooltipwidget.h"
 #include "clangfixitoperation.h"
 #include "clangfixitoperationsextractor.h"
@@ -67,12 +67,12 @@ namespace ClangCodeModel {
 namespace Internal {
 
 ClangEditorDocumentProcessor::ClangEditorDocumentProcessor(
-        IpcCommunicator &ipcCommunicator,
+        BackendCommunicator &communicator,
         TextEditor::TextDocument *document)
     : BaseEditorDocumentProcessor(document->document(), document->filePath().toString())
     , m_document(*document)
     , m_diagnosticManager(document)
-    , m_ipcCommunicator(ipcCommunicator)
+    , m_communicator(communicator)
     , m_parser(new ClangEditorDocumentParser(document->filePath().toString()))
     , m_parserRevision(0)
     , m_semanticHighlighter(document)
@@ -102,7 +102,7 @@ ClangEditorDocumentProcessor::~ClangEditorDocumentProcessor()
     m_parserWatcher.waitForFinished();
 
     if (m_projectPart) {
-        m_ipcCommunicator.unregisterTranslationUnitsForEditor(
+        m_communicator.unregisterTranslationUnitsForEditor(
             {ClangBackEnd::FileContainer(filePath(), m_projectPart->id())});
     }
 }
@@ -343,11 +343,11 @@ ClangEditorDocumentProcessor::cursorInfo(const CppTools::CursorInfoParams &param
     const CppTools::SemanticInfo::LocalUseMap localUses
         = CppTools::BuiltinCursorInfo::findLocalUses(params.semanticInfo.doc, line, column);
 
-    return m_ipcCommunicator.requestReferences(simpleFileContainer(),
-                                               static_cast<quint32>(line),
-                                               static_cast<quint32>(column),
-                                               textDocument(),
-                                               localUses);
+    return m_communicator.requestReferences(simpleFileContainer(),
+                                            static_cast<quint32>(line),
+                                            static_cast<quint32>(column),
+                                            textDocument(),
+                                            localUses);
 }
 
 static QVector<Utf8String> prioritizeByBaseName(const QString &curPath,
@@ -392,10 +392,10 @@ ClangEditorDocumentProcessor::requestFollowSymbol(int line, int column)
         dependentFiles = prioritizeByBaseName(filePath(), fileDeps);
     }
 
-    return m_ipcCommunicator.requestFollowSymbol(simpleFileContainer(),
-                                                 dependentFiles,
-                                                 static_cast<quint32>(line),
-                                                 static_cast<quint32>(column));
+    return m_communicator.requestFollowSymbol(simpleFileContainer(),
+                                              dependentFiles,
+                                              static_cast<quint32>(line),
+                                              static_cast<quint32>(column));
 }
 
 ClangBackEnd::FileContainer ClangEditorDocumentProcessor::fileContainerWithArguments() const
@@ -456,10 +456,10 @@ void ClangEditorDocumentProcessor::registerTranslationUnitForEditor(CppTools::Pr
     if (m_projectPart) {
         if (projectPart->id() == m_projectPart->id())
             return;
-        m_ipcCommunicator.unregisterTranslationUnitsForEditor({fileContainerWithArguments()});
+        m_communicator.unregisterTranslationUnitsForEditor({fileContainerWithArguments()});
     }
 
-    m_ipcCommunicator.registerTranslationUnitsForEditor(
+    m_communicator.registerTranslationUnitsForEditor(
         {fileContainerWithArgumentsAndDocumentContent(projectPart)});
     ClangCodeModel::Utils::setLastSentDocumentRevision(filePath(), revision());
 }
@@ -469,7 +469,7 @@ void ClangEditorDocumentProcessor::updateTranslationUnitIfProjectPartExists()
     if (m_projectPart) {
         const ClangBackEnd::FileContainer fileContainer = fileContainerWithDocumentContent(m_projectPart->id());
 
-        m_ipcCommunicator.updateTranslationUnitWithRevisionCheck(fileContainer);
+        m_communicator.updateTranslationUnitWithRevisionCheck(fileContainer);
     }
 }
 
@@ -477,7 +477,7 @@ void ClangEditorDocumentProcessor::requestDocumentAnnotations(const QString &pro
 {
     const auto fileContainer = fileContainerWithDocumentContent(projectpartId);
 
-    m_ipcCommunicator.requestDocumentAnnotations(fileContainer);
+    m_communicator.requestDocumentAnnotations(fileContainer);
 }
 
 CppTools::BaseEditorDocumentProcessor::HeaderErrorDiagnosticWidgetCreator
diff --git a/src/plugins/clangcodemodel/clangeditordocumentprocessor.h b/src/plugins/clangcodemodel/clangeditordocumentprocessor.h
index d7f7f966f50..a040cba256b 100644
--- a/src/plugins/clangcodemodel/clangeditordocumentprocessor.h
+++ b/src/plugins/clangcodemodel/clangeditordocumentprocessor.h
@@ -43,14 +43,14 @@ class FileContainer;
 namespace ClangCodeModel {
 namespace Internal {
 
-class IpcCommunicator;
+class BackendCommunicator;
 
 class ClangEditorDocumentProcessor : public CppTools::BaseEditorDocumentProcessor
 {
     Q_OBJECT
 
 public:
-    ClangEditorDocumentProcessor(IpcCommunicator &ipcCommunicator,
+    ClangEditorDocumentProcessor(BackendCommunicator &communicator,
                                  TextEditor::TextDocument *document);
     ~ClangEditorDocumentProcessor();
 
@@ -114,7 +114,7 @@ private:
 private:
     TextEditor::TextDocument &m_document;
     ClangDiagnosticManager m_diagnosticManager;
-    IpcCommunicator &m_ipcCommunicator;
+    BackendCommunicator &m_communicator;
     QSharedPointer<ClangEditorDocumentParser> m_parser;
     CppTools::ProjectPart::Ptr m_projectPart;
     bool m_isProjectFile = false;
diff --git a/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp b/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
index c5d85045c51..df1e96869c3 100644
--- a/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
+++ b/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
@@ -66,7 +66,7 @@ static CppTools::CppModelManager *cppModelManager()
 }
 
 ModelManagerSupportClang::ModelManagerSupportClang()
-    : m_completionAssistProvider(m_ipcCommunicator)
+    : m_completionAssistProvider(m_communicator)
 {
     QTC_CHECK(!m_instance);
     m_instance = this;
@@ -96,7 +96,7 @@ ModelManagerSupportClang::ModelManagerSupportClang()
     connect(modelManager, &CppTools::CppModelManager::projectPartsRemoved,
             this, &ModelManagerSupportClang::onProjectPartsRemoved);
 
-    m_ipcCommunicator.registerFallbackProjectPart();
+    m_communicator.registerFallbackProjectPart();
 }
 
 ModelManagerSupportClang::~ModelManagerSupportClang()
@@ -117,12 +117,12 @@ CppTools::FollowSymbolInterface &ModelManagerSupportClang::followSymbolInterface
 CppTools::BaseEditorDocumentProcessor *ModelManagerSupportClang::editorDocumentProcessor(
         TextEditor::TextDocument *baseTextDocument)
 {
-    return new ClangEditorDocumentProcessor(m_ipcCommunicator, baseTextDocument);
+    return new ClangEditorDocumentProcessor(m_communicator, baseTextDocument);
 }
 
 void ModelManagerSupportClang::onCurrentEditorChanged(Core::IEditor *)
 {
-    m_ipcCommunicator.updateTranslationUnitVisiblity();
+    m_communicator.updateTranslationUnitVisiblity();
 }
 
 void ModelManagerSupportClang::connectTextDocumentToTranslationUnit(TextEditor::TextDocument *textDocument)
@@ -195,7 +195,7 @@ void ModelManagerSupportClang::onEditorOpened(Core::IEditor *editor)
 
 void ModelManagerSupportClang::onEditorClosed(const QList<Core::IEditor *> &)
 {
-    m_ipcCommunicator.updateTranslationUnitVisiblity();
+    m_communicator.updateTranslationUnitVisiblity();
 }
 
 void ModelManagerSupportClang::onCppDocumentAboutToReloadOnTranslationUnit()
@@ -210,7 +210,7 @@ void ModelManagerSupportClang::onCppDocumentReloadFinishedOnTranslationUnit(bool
     if (success) {
         TextEditor::TextDocument *textDocument = qobject_cast<TextEditor::TextDocument *>(sender());
         connectToTextDocumentContentsChangedForTranslationUnit(textDocument);
-        m_ipcCommunicator.updateTranslationUnitWithRevisionCheck(textDocument);
+        m_communicator.updateTranslationUnitWithRevisionCheck(textDocument);
     }
 }
 
@@ -229,9 +229,9 @@ void ModelManagerSupportClang::onCppDocumentContentsChangedOnTranslationUnit(int
 {
     Core::IDocument *document = qobject_cast<Core::IDocument *>(sender());
 
-    m_ipcCommunicator.updateChangeContentStartPosition(document->filePath().toString(),
+    m_communicator.updateChangeContentStartPosition(document->filePath().toString(),
                                                        position);
-    m_ipcCommunicator.updateTranslationUnitIfNotCurrentDocument(document);
+    m_communicator.updateTranslationUnitIfNotCurrentDocument(document);
 
     clearDiagnosticFixIts(document->filePath().toString());
 }
@@ -248,14 +248,14 @@ void ModelManagerSupportClang::onCppDocumentReloadFinishedOnUnsavedFile(bool suc
     if (success) {
         TextEditor::TextDocument *textDocument = qobject_cast<TextEditor::TextDocument *>(sender());
         connectToTextDocumentContentsChangedForUnsavedFile(textDocument);
-        m_ipcCommunicator.updateUnsavedFile(textDocument);
+        m_communicator.updateUnsavedFile(textDocument);
     }
 }
 
 void ModelManagerSupportClang::onCppDocumentContentsChangedOnUnsavedFile()
 {
     Core::IDocument *document = qobject_cast<Core::IDocument *>(sender());
-    m_ipcCommunicator.updateUnsavedFile(document);
+    m_communicator.updateUnsavedFile(document);
 }
 
 void ModelManagerSupportClang::onAbstractEditorSupportContentsUpdated(const QString &filePath,
@@ -264,7 +264,7 @@ void ModelManagerSupportClang::onAbstractEditorSupportContentsUpdated(const QStr
     QTC_ASSERT(!filePath.isEmpty(), return);
 
     const QString mappedPath = m_uiHeaderOnDiskManager.createIfNeeded(filePath);
-    m_ipcCommunicator.updateUnsavedFile(mappedPath, content, 0);
+    m_communicator.updateUnsavedFile(mappedPath, content, 0);
 }
 
 void ModelManagerSupportClang::onAbstractEditorSupportRemoved(const QString &filePath)
@@ -274,7 +274,7 @@ void ModelManagerSupportClang::onAbstractEditorSupportRemoved(const QString &fil
     if (!cppModelManager()->cppEditorDocument(filePath)) {
         const QString mappedPath = m_uiHeaderOnDiskManager.remove(filePath);
         const QString projectPartId = Utils::projectPartIdForFile(filePath);
-        m_ipcCommunicator.unregisterUnsavedFilesForEditor({{mappedPath, projectPartId}});
+        m_communicator.unregisterUnsavedFilesForEditor({{mappedPath, projectPartId}});
     }
 }
 
@@ -328,16 +328,16 @@ void ModelManagerSupportClang::onProjectPartsUpdated(ProjectExplorer::Project *p
     const CppTools::ProjectInfo projectInfo = cppModelManager()->projectInfo(project);
     QTC_ASSERT(projectInfo.isValid(), return);
 
-    m_ipcCommunicator.registerProjectsParts(projectInfo.projectParts());
-    m_ipcCommunicator.registerFallbackProjectPart();
+    m_communicator.registerProjectsParts(projectInfo.projectParts());
+    m_communicator.registerFallbackProjectPart();
 }
 
 void ModelManagerSupportClang::onProjectPartsRemoved(const QStringList &projectPartIds)
 {
     if (!projectPartIds.isEmpty()) {
         unregisterTranslationUnitsWithProjectParts(projectPartIds);
-        m_ipcCommunicator.unregisterProjectPartsForEditor(projectPartIds);
-        m_ipcCommunicator.registerFallbackProjectPart();
+        m_communicator.unregisterProjectPartsForEditor(projectPartIds);
+        m_communicator.registerFallbackProjectPart();
     }
 }
 
@@ -363,7 +363,7 @@ void ModelManagerSupportClang::unregisterTranslationUnitsWithProjectParts(
 {
     const auto processors = clangProcessorsWithProjectParts(projectPartIds);
     foreach (ClangEditorDocumentProcessor *processor, processors) {
-        m_ipcCommunicator.unregisterTranslationUnitsForEditor({processor->fileContainerWithArguments()});
+        m_communicator.unregisterTranslationUnitsForEditor({processor->fileContainerWithArguments()});
         processor->clearProjectPart();
         processor->run();
     }
@@ -374,9 +374,9 @@ ModelManagerSupportClang *ModelManagerSupportClang::instance()
     return m_instance;
 }
 
-IpcCommunicator &ModelManagerSupportClang::ipcCommunicator()
+BackendCommunicator &ModelManagerSupportClang::communicator()
 {
-    return m_ipcCommunicator;
+    return m_communicator;
 }
 
 QString ModelManagerSupportClang::dummyUiHeaderOnDiskPath(const QString &filePath) const
diff --git a/src/plugins/clangcodemodel/clangmodelmanagersupport.h b/src/plugins/clangcodemodel/clangmodelmanagersupport.h
index 78e5cd5694a..f87ac11923a 100644
--- a/src/plugins/clangcodemodel/clangmodelmanagersupport.h
+++ b/src/plugins/clangcodemodel/clangmodelmanagersupport.h
@@ -62,7 +62,7 @@ public:
                 TextEditor::TextDocument *baseTextDocument) override;
     CppTools::FollowSymbolInterface &followSymbolInterface() override;
 
-    IpcCommunicator &ipcCommunicator();
+    BackendCommunicator &communicator();
     QString dummyUiHeaderOnDiskDirPath() const;
     QString dummyUiHeaderOnDiskPath(const QString &filePath) const;
 
@@ -102,7 +102,7 @@ private:
 
 private:
     UiHeaderOnDiskManager m_uiHeaderOnDiskManager;
-    IpcCommunicator m_ipcCommunicator;
+    BackendCommunicator m_communicator;
     ClangCompletionAssistProvider m_completionAssistProvider;
     std::unique_ptr<CppTools::FollowSymbolInterface> m_followSymbol;
 };