https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76783
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- Ok, the BB iteration order of the SSA propagator now visits the merger in a half-diamond before the then block, breaking the setting of prop_set_simulate_again in simulate_stmt for two constant uses. Easy out is to consider ! executable edges as has_simulate_again_uses. I guess we need that to be conservative anyway. But then iteration order is not optimal here. Search for a better one than PRE order (use reverse RPO order?)
