{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"||"}]}
            || tcx.sess.opts.unstable_opts.mir_preserve_ub;
        let preserve_switch_reads = matches!(body.phase, MirPhase::Built | MirPhase::Analysis(_))
        // Do not clear caches yet. The caller to `simplify` will do it if anything changed.