225   llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem(  in runToolOnCodeWithArgs()  local
226       new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem()));  in runToolOnCodeWithArgs()
229   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in runToolOnCodeWithArgs()
242   return runToolOnCodeWithArgs(std::move(ToolAction), Code, OverlayFileSystem,  in runToolOnCodeWithArgs()
447       OverlayFileSystem(new llvm::vfs::OverlayFileSystem(std::move(BaseFS))),  in ClangTool()
450                   : new FileManager(FileSystemOptions(), OverlayFileSystem)) {  in ClangTool()
451   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in ClangTool()
456     Files->setVirtualFileSystem(OverlayFileSystem);  in ClangTool()
507     auto AbsPath = getAbsolutePath(*OverlayFileSystem, SourcePath);  in run()
520     if (auto CWD = OverlayFileSystem->getCurrentWorkingDirectory()) {  in run()
551       if (OverlayFileSystem->setCurrentWorkingDirectory(  in run()
599             OverlayFileSystem->setCurrentWorkingDirectory(InitialWorkingDir))  in run()
664   llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem(  in buildASTFromCodeWithArgs()  local
665       new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem()));  in buildASTFromCodeWithArgs()
668   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in buildASTFromCodeWithArgs()
670       new FileManager(FileSystemOptions(), OverlayFileSystem));  in buildASTFromCodeWithArgs()