progress = remove_dead_vars(&shader->globals, live) || progress;
if (modes & nir_var_system_value)
progress = remove_dead_vars(&shader->system_values, live) || progress;
progress = remove_dead_vars(&shader->globals, live) || progress;
if (modes & nir_var_system_value)
progress = remove_dead_vars(&shader->system_values, live) || progress;