{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
                    let res = fx.bcx.ins().select(is_zero, zero, a_lane);
                    let a_lane = a.value_lane_dyn(fx, a_idx).load_scalar(fx);
                    ret.place_lane(fx, i).to_ptr().store(fx, res, MemFlags::trusted());