272   directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override;
390   llvm::sys::fs::directory_iterator Iter;
394     if (Iter != llvm::sys::fs::directory_iterator())  in RealFSDirIter()
401     CurrentEntry = (Iter == llvm::sys::fs::directory_iterator())  in increment()
410 directory_iterator RealFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
413   return directory_iterator(  in dir_begin()
505   SmallVector<directory_iterator, 8> IterList;
507   directory_iterator CurrentDirIter;
517       if (CurrentDirIter != directory_iterator())  in incrementIter()
521     if (IsFirstTime && CurrentDirIter == directory_iterator())  in incrementIter()
527     assert((IsFirstTime || CurrentDirIter != directory_iterator()) &&  in incrementDirIter()
532     if (!EC && CurrentDirIter == directory_iterator())  in incrementDirIter()
540       if (EC || CurrentDirIter == directory_iterator()) {  in incrementImpl()
557       directory_iterator Iter = FS->dir_begin(Dir, FEC);  in CombiningDirIterImpl()
568   CombiningDirIterImpl(ArrayRef<directory_iterator> DirIters,  in CombiningDirIterImpl()
579 directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
581   directory_iterator Combined = directory_iterator(  in dir_begin()
1120 directory_iterator InMemoryFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1125     return directory_iterator(std::make_shared<DirIterator>());  in dir_begin()
1129     return directory_iterator(  in dir_begin()
1133   return directory_iterator(std::make_shared<DirIterator>());  in dir_begin()
1282   llvm::vfs::directory_iterator ExternalIter;
1286                                 llvm::vfs::directory_iterator ExtIter)  in RedirectingFSDirRemapIterImpl()
1289     if (ExternalIter != llvm::vfs::directory_iterator())  in RedirectingFSDirRemapIterImpl()
1307     if (!EC && ExternalIter != llvm::vfs::directory_iterator())  in increment()
1402 directory_iterator RedirectingFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1439   directory_iterator RedirectIter;  in dir_begin()
1448           directory_iterator(std::make_shared<RedirectingFSDirRemapIterImpl>(  in dir_begin()
1454         directory_iterator(std::make_shared<RedirectingFSDirIterImpl>(  in dir_begin()
1472   directory_iterator ExternalIter = ExternalFS->dir_begin(Path, ExternalEC);  in dir_begin()
1481   SmallVector<directory_iterator, 2> Iters;  in dir_begin()
1495   directory_iterator Combined{  in dir_begin()
2834   directory_iterator I = FS->dir_begin(Path, EC);  in recursive_directory_iterator()
2835   if (I != directory_iterator()) {  in recursive_directory_iterator()
2845   vfs::directory_iterator End;  in increment()
2851       vfs::directory_iterator I = FS->dir_begin(State->Stack.top()->path(), EC);  in increment()