//
// This must be set by the OS init code (typically in osinit) before
// mallocinit.
var physPageSize uintptr

// physHugePageSize is the size in bytes of the OS's default physical huge
// page size whose allocation is opaque to the application. It is assumed
// and verified to be a power of two.
//
// If set, this must be set by the OS init code (typically in osinit) before

  bool IsRootEnter(const Node* n) const {
    return IsEnter(n) && control_flow_info_[n->id()].parent_frame->IsSource();
  }

  bool IsRootExit(const Node* n) const {
    return IsExit(n) && control_flow_info_[n->id()].parent_frame->IsSource();
  }

  const Graph& graph_;
  absl::flat_hash_map<TensorId, Predicate*, TensorId::Hasher> predicate_map_;
  PredicateFactory predicate_factory_;