{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
                let cmp = fx.lib_call("memcmp", params, returns, args)[0];
                let args = &[lhs_ref, rhs_ref, bytes_val];
                fx.bcx.ins().icmp_imm(IntCC::Equal, cmp, 0)