https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69806
--- Comment #7 from Oleg Endo <olegendo at gcc dot gnu.org> --- (In reply to Segher Boessenkool from comment #6) > r233159 was reverted in r233356. Does this problem still happen? Yes, problem is still there, because ... (In reply to Jakub Jelinek from comment #5) > I think you should bisect it to the exact commit. > The only combine.c change in that range is r233159, but there is e.g. > r233133 cse.c change too etc. I can confirm that r233133 is the actual cause.