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()
436       OverlayFileSystem(new llvm::vfs::OverlayFileSystem(std::move(BaseFS))),  in ClangTool()
439                   : new FileManager(FileSystemOptions(), OverlayFileSystem)) {  in ClangTool()
440   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in ClangTool()
445     Files->setVirtualFileSystem(OverlayFileSystem);  in ClangTool()
496     auto AbsPath = getAbsolutePath(*OverlayFileSystem, SourcePath);  in run()
509     if (auto CWD = OverlayFileSystem->getCurrentWorkingDirectory()) {  in run()
540       if (OverlayFileSystem->setCurrentWorkingDirectory(  in run()
588             OverlayFileSystem->setCurrentWorkingDirectory(InitialWorkingDir))  in run()
653   llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem(  in buildASTFromCodeWithArgs()  local
654       new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem()));  in buildASTFromCodeWithArgs()
657   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in buildASTFromCodeWithArgs()
659       new FileManager(FileSystemOptions(), OverlayFileSystem));  in buildASTFromCodeWithArgs()