https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81695
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- (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 ;).