In the base class BaseVisitor of the clang parser, check whether the file has changed by comparing the CXFile. If it has changed, convert the file name to a QString and call visitLocation(). The code is then faster since the file name checks are only performed when the CXFile changes. The check code operating on QString becomes simpler and can be extended more easily. Task-number: PYSIDE-802 Task-number: PYSIDE-1660 Pick-to: 6.2 Change-Id: I1dd22ef91a4a7b96d05507b43511313507281fd6 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>