assert(exec_list_length(&shader->functions) == 1);
struct exec_node *func_node = exec_list_get_head(&shader->functions);
nir_function *func = exec_node_data(nir_function, func_node, node);
+ assert(func->return_type == glsl_void_type());
+ assert(func->num_params == 0);
return func;
}