82   StringRef DirName = llvm::sys::path::parent_path(Filename);  in getDirectoryFromFile()  local
84   if (DirName.empty())  in getDirectoryFromFile()
85     DirName = ".";  in getDirectoryFromFile()
87   return FileMgr.getDirectoryRef(DirName, CacheFailure);  in getDirectoryFromFile()
93   StringRef DirName = llvm::sys::path::parent_path(Path);  in addAncestorsAsVirtualDirs()  local
94   if (DirName.empty())  in addAncestorsAsVirtualDirs()
95     DirName = ".";  in addAncestorsAsVirtualDirs()
98         {DirName, std::errc::no_such_file_or_directory}).first;  in addAncestorsAsVirtualDirs()
114   addAncestorsAsVirtualDirs(DirName);  in addAncestorsAsVirtualDirs()
118 FileManager::getDirectoryRef(StringRef DirName, bool CacheFailure) {  in getDirectoryRef()  argument
122   if (DirName.size() > 1 &&  in getDirectoryRef()
123       DirName != llvm::sys::path::root_path(DirName) &&  in getDirectoryRef()
124       llvm::sys::path::is_separator(DirName.back()))  in getDirectoryRef()
125     DirName = DirName.substr(0, DirName.size()-1);  in getDirectoryRef()
130   if (DirName.size() > 1 && DirName.back() == ':' &&  in getDirectoryRef()
131       DirName.equals_lower(llvm::sys::path::root_name(DirName))) {  in getDirectoryRef()
132     DirNameStr = DirName.str() + '.';  in getDirectoryRef()
133     DirName = DirNameStr;  in getDirectoryRef()
142       SeenDirEntries.insert({DirName, std::errc::no_such_file_or_directory});  in getDirectoryRef()
167       SeenDirEntries.erase(DirName);  in getDirectoryRef()
188 FileManager::getDirectory(StringRef DirName, bool CacheFailure) {  in getDirectory()  argument
189   auto Result = getDirectoryRef(DirName, CacheFailure);  in getDirectory()