https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94618
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I think the difference is much earlier, in cse_local dump there is (with additional --param=min-nondebug-insn-uid=10000): deferring deletion of insn with uid = 10060. -deferring deletion of insn with uid = 10059. -Deleted 2 trivially dead insns +Deleted 1 trivially dead insns where the RA then removes the trivially dead insn when cse_local didn't.