{"ast_node_type":"function","tokens":[{"end":96,"kind":"keyword","start":0,"text":"fn"}]}
fn parse_instruction_set_attr(tcx: TyCtxt<'_>, attr: &Attribute) -> Option<InstructionSetAttr> {
// FIXME(jdonszelmann): remove when instruction_set becomes a parsed attr
    let list = attr.meta_item_list()?;