{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"on_stack_param_indices.insert(argument_tys.len());"}]}
                    on_stack_param_indices.insert(argument_tys.len());
                    // This is a "byval" argument, so we don't apply the `restrict` attribute on it.
                    arg.layout.gcc_type(cx)