{"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
    let lt = fx.bcx.ins().icmp(lt_cc, lhs, rhs);
    let gt = fx.bcx.ins().icmp(gt_cc, lhs, rhs);
    let val = fx.bcx.ins().isub(gt, lt);