Function IsHostMemoryPreserving

tensorflow/core/graph/graph.h:889–891

inline bool IsScopedAllocator(const Node* n) { return n->IsScopedAllocator(); }

inline bool IsHostMemoryPreserving(const Node* node) {
  return IsIdentity(node) || IsControlFlow(node);
}

// NOTE: We declare Reference type of NodeIter and NeighborIter as Node* (see
// https://en.cppreference.com/w/cpp/iterator/iterator).