https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81695
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Marek Polacek from comment #3) > (In reply to Richard Biener from comment #2) > > Note the folding we do here is not safe (but I hesitated to remove all the > > copies...). It can end up confusing data dependence analysis (read: > > wrong-code). > > I hope you don't mean that removing the folding causes wrong-code ;). No, on the contrary...