83   StringRef DirName = llvm::sys::path::parent_path(Filename);  in getDirectoryFromFile()  local
85   if (DirName.empty())  in getDirectoryFromFile()
86     DirName = ".";  in getDirectoryFromFile()
88   return FileMgr.getDirectoryRef(DirName, CacheFailure);  in getDirectoryFromFile()
94   StringRef DirName = llvm::sys::path::parent_path(Path);  in addAncestorsAsVirtualDirs()  local
95   if (DirName.empty())  in addAncestorsAsVirtualDirs()
96     DirName = ".";  in addAncestorsAsVirtualDirs()
99         {DirName, std::errc::no_such_file_or_directory}).first;  in addAncestorsAsVirtualDirs()
115   addAncestorsAsVirtualDirs(DirName);  in addAncestorsAsVirtualDirs()
119 FileManager::getDirectoryRef(StringRef DirName, bool CacheFailure) {  in getDirectoryRef()  argument
123   if (DirName.size() > 1 &&  in getDirectoryRef()
124       DirName != llvm::sys::path::root_path(DirName) &&  in getDirectoryRef()
125       llvm::sys::path::is_separator(DirName.back()))  in getDirectoryRef()
126     DirName = DirName.substr(0, DirName.size()-1);  in getDirectoryRef()
131     if (DirName.size() > 1 && DirName.back() == ':' &&  in getDirectoryRef()
132         DirName.equals_insensitive(llvm::sys::path::root_name(DirName))) {  in getDirectoryRef()
133       DirNameStr = DirName.str() + '.';  in getDirectoryRef()
134       DirName = *DirNameStr;  in getDirectoryRef()
143       SeenDirEntries.insert({DirName, std::errc::no_such_file_or_directory});  in getDirectoryRef()
168       SeenDirEntries.erase(DirName);  in getDirectoryRef()
190 FileManager::getDirectory(StringRef DirName, bool CacheFailure) {  in getDirectory()  argument
191   auto Result = getDirectoryRef(DirName, CacheFailure);  in getDirectory()