{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":".flat_map(|feat|"}]}
        .flat_map(|feat| to_gcc_features(cx.tcx.sess, feat).into_iter())
        .map(|features| features.name.as_str())
        .chain(codegen_fn_attrs.instruction_set.iter().map(|x| match *x {