https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90476
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Segher Boessenkool from comment #3) > Where is it documented (in GCC). then? I can't find it. ¯\_(ツ)_/¯ I dunno where they got that idea; just reporting it because I thought it seemed like it might be relevant