475 struct LoopDepthTree {  struct
476   using LoopsOnLevelTy = SmallVector<LoopVector, 4>;
477   using iterator = LoopsOnLevelTy::iterator;
478   using const_iterator = LoopsOnLevelTy::const_iterator;
480   LoopDepthTree(LoopInfo &LI) : Depth(1) {  in LoopDepthTree()  argument
487   bool isRemovedLoop(const Loop *L) const { return RemovedLoops.count(L); }  in isRemovedLoop()
491   void removeLoop(const Loop *L) { RemovedLoops.insert(L); }  in removeLoop()
494   void descend() {  in descend()
507   bool empty() const { return size() == 0; }  in empty()
508   size_t size() const { return LoopsOnLevel.size() - RemovedLoops.size(); }  in size()
509   unsigned getDepth() const { return Depth; }  in getDepth()
511   iterator begin() { return LoopsOnLevel.begin(); }  in begin()
512   iterator end() { return LoopsOnLevel.end(); }  in end()
513   const_iterator begin() const { return LoopsOnLevel.begin(); }  in begin()
514   const_iterator end() const { return LoopsOnLevel.end(); }  in end()
519   SmallPtrSet<const Loop *, 8> RemovedLoops;
522   unsigned Depth;
525   LoopsOnLevelTy LoopsOnLevel;