{"ast_node_type":"import","tokens":[{"end":62,"kind":"keyword","start":0,"text":"//"}]}
        // TODO: we probably need to use gcc_int_cast instead.
        let a_val = bx.context.new_bitcast(None, a_val, unsigned_type);
        let a_val = bx.gcc_int_cast(a_val, new_int_type);