{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"if"}]}
                if bx.cx().tcx().sess.opts.optimize == OptLevel::No {
                let pred = |op| base::bin_op_to_icmp_predicate(op, is_signed);
                    // FIXME: This actually generates tighter assembly, and is a classic trick