{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"let"}]}
                let t_idx = fx.bcx.ins().uextend(fx.pointer_type, idx_lane);
                    fx.bcx.ins().icmp_imm(IntCC::UnsignedGreaterThanOrEqual, idx_lane, 16);
                let t_lane = t.value_lane_dyn(fx, t_idx).load_scalar(fx);