{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"//"}]}
    // -Zretpoline without -Zretpoline-external-thunk enables
pub fn retpoline_features_by_flags(sess: &Session, features: &mut Vec<String>) {
    // retpoline-indirect-branches and retpoline-indirect-calls target features