272   directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override;
388   llvm::sys::fs::directory_iterator Iter;
392     if (Iter != llvm::sys::fs::directory_iterator())  in RealFSDirIter()
399     CurrentEntry = (Iter == llvm::sys::fs::directory_iterator())  in increment()
408 directory_iterator RealFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
411   return directory_iterator(  in dir_begin()
503   SmallVector<directory_iterator, 8> IterList;
505   directory_iterator CurrentDirIter;
515       if (CurrentDirIter != directory_iterator())  in incrementIter()
519     if (IsFirstTime && CurrentDirIter == directory_iterator())  in incrementIter()
525     assert((IsFirstTime || CurrentDirIter != directory_iterator()) &&  in incrementDirIter()
530     if (!EC && CurrentDirIter == directory_iterator())  in incrementDirIter()
538       if (EC || CurrentDirIter == directory_iterator()) {  in incrementImpl()
555       directory_iterator Iter = FS->dir_begin(Dir, FEC);  in CombiningDirIterImpl()
566   CombiningDirIterImpl(ArrayRef<directory_iterator> DirIters,  in CombiningDirIterImpl()
577 directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
579   directory_iterator Combined = directory_iterator(  in dir_begin()
1122 directory_iterator InMemoryFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1127     return directory_iterator(std::make_shared<DirIterator>());  in dir_begin()
1131     return directory_iterator(  in dir_begin()
1135   return directory_iterator(std::make_shared<DirIterator>());  in dir_begin()
1284   llvm::vfs::directory_iterator ExternalIter;
1288                                 llvm::vfs::directory_iterator ExtIter)  in RedirectingFSDirRemapIterImpl()
1291     if (ExternalIter != llvm::vfs::directory_iterator())  in RedirectingFSDirRemapIterImpl()
1309     if (!EC && ExternalIter != llvm::vfs::directory_iterator())  in increment()
1385 directory_iterator RedirectingFileSystem::dir_begin(const Twine &Dir,  in dir_begin()
1422   directory_iterator RedirectIter;  in dir_begin()
1431           directory_iterator(std::make_shared<RedirectingFSDirRemapIterImpl>(  in dir_begin()
1437         directory_iterator(std::make_shared<RedirectingFSDirIterImpl>(  in dir_begin()
1455   directory_iterator ExternalIter = ExternalFS->dir_begin(Path, ExternalEC);  in dir_begin()
1464   SmallVector<directory_iterator, 2> Iters;  in dir_begin()
1478   directory_iterator Combined{  in dir_begin()
2761   directory_iterator I = FS->dir_begin(Path, EC);  in recursive_directory_iterator()
2762   if (I != directory_iterator()) {  in recursive_directory_iterator()
2772   vfs::directory_iterator End;  in increment()
2778       vfs::directory_iterator I = FS->dir_begin(State->Stack.top()->path(), EC);  in increment()