77   StringRef DirName = llvm::sys::path::parent_path(Filename);  in getDirectoryFromFile()  local
79   if (DirName.empty())  in getDirectoryFromFile()
80     DirName = ".";  in getDirectoryFromFile()
82   return FileMgr.getDirectoryRef(DirName, CacheFailure);  in getDirectoryFromFile()
104   StringRef DirName = llvm::sys::path::parent_path(Path);  in addAncestorsAsVirtualDirs()  local
105   if (DirName.empty())  in addAncestorsAsVirtualDirs()
106     DirName = ".";  in addAncestorsAsVirtualDirs()
109         {DirName, std::errc::no_such_file_or_directory}).first;  in addAncestorsAsVirtualDirs()
121       getStatValue(DirName, Status, false, nullptr /*directory lookup*/);  in addAncestorsAsVirtualDirs()
135   addAncestorsAsVirtualDirs(DirName);  in addAncestorsAsVirtualDirs()
139 FileManager::getDirectoryRef(StringRef DirName, bool CacheFailure) {  in getDirectoryRef()  argument
143   if (DirName.size() > 1 &&  in getDirectoryRef()
144       DirName != llvm::sys::path::root_path(DirName) &&  in getDirectoryRef()
145       llvm::sys::path::is_separator(DirName.back()))  in getDirectoryRef()
146     DirName = DirName.substr(0, DirName.size()-1);  in getDirectoryRef()
151     if (DirName.size() > 1 && DirName.back() == ':' &&  in getDirectoryRef()
152         DirName.equals_insensitive(llvm::sys::path::root_name(DirName))) {  in getDirectoryRef()
153       DirNameStr = DirName.str() + '.';  in getDirectoryRef()
154       DirName = *DirNameStr;  in getDirectoryRef()
163       SeenDirEntries.insert({DirName, std::errc::no_such_file_or_directory});  in getDirectoryRef()
188       SeenDirEntries.erase(DirName);  in getDirectoryRef()
200 FileManager::getDirectory(StringRef DirName, bool CacheFailure) {  in getDirectory()  argument
201   auto Result = getDirectoryRef(DirName, CacheFailure);  in getDirectory()