https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67650
--- Comment #5 from Vincent <vincent.lextrait at gmail dot com> --- The problem is static time, not dynamic time. This artefact is just a result of source code reduction. In my code there is no "0", and the problem exists. I can provide an alternative case without this artefact, but I do not believe it harms investigations at all.