"Dmitry" <mittie@xxxxxxx> writes: > But is there a chance that between a rtl generation and splitting an insn, a compiler could use that clobbered CC reg in some of intermediate phases, but after a register allocation it turns out that there shouldn't be any clobber at all? Yes, there is a chance that that could happen. If you are lucky you will be able to clean it up after the splitting and reload, by observing the redundant set. Ian