free_slots = n_regs - ARR_LEN(starters);
free_pressure_slots = n_regs - (pressure - ARR_LEN(delayed));
free_slots = MIN(free_slots, free_pressure_slots);
free_slots = n_regs - ARR_LEN(starters);
free_pressure_slots = n_regs - (pressure - ARR_LEN(delayed));
free_slots = MIN(free_slots, free_pressure_slots);