118   StringRef DirName = llvm::sys::path::parent_path(Filename);  in getDirectoryFromFile()  local
120   if (DirName.empty())  in getDirectoryFromFile()
121     DirName = ".";  in getDirectoryFromFile()
123   return FileMgr.getDirectory(DirName, CacheFailure);  in getDirectoryFromFile()
129   StringRef DirName = llvm::sys::path::parent_path(Path);  in addAncestorsAsVirtualDirs()  local
130   if (DirName.empty())  in addAncestorsAsVirtualDirs()
134       *SeenDirEntries.insert(std::make_pair(DirName, nullptr)).first;  in addAncestorsAsVirtualDirs()
150   addAncestorsAsVirtualDirs(DirName);  in addAncestorsAsVirtualDirs()
153 const DirectoryEntry *FileManager::getDirectory(StringRef DirName,  in getDirectory()  argument
158   if (DirName.size() > 1 &&  in getDirectory()
159       DirName != llvm::sys::path::root_path(DirName) &&  in getDirectory()
160       llvm::sys::path::is_separator(DirName.back()))  in getDirectory()
161     DirName = DirName.substr(0, DirName.size()-1);  in getDirectory()
166   if (DirName.size() > 1 && DirName.back() == ':' &&  in getDirectory()
167       DirName.equals_lower(llvm::sys::path::root_name(DirName))) {  in getDirectory()
168     DirNameStr = DirName.str() + '.';  in getDirectory()
169     DirName = DirNameStr;  in getDirectory()
175       *SeenDirEntries.insert(std::make_pair(DirName, nullptr)).first;  in getDirectory()
197       SeenDirEntries.erase(DirName);  in getDirectory()