{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"///"}]}
    /// as-needed (e.g. RPO reaching it or another block branching to it).
    /// A backend `BasicBlock` for each MIR `BasicBlock`, created lazily
    // FIXME(eddyb) rename `llbbs` and other `ll`-prefixed things to use a