{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"///"}]}
    /// cached in `self.cached_llbbs`, or created on demand (and cached).
    /// Get the backend `BasicBlock` for a MIR `BasicBlock`, either already
    // FIXME(eddyb) rename `llbb` and other `ll`-prefixed things to use a