233   llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem(  in runToolOnCodeWithArgs()  local
234       new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem()));  in runToolOnCodeWithArgs()
237   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in runToolOnCodeWithArgs()
250   return runToolOnCodeWithArgs(std::move(ToolAction), Code, OverlayFileSystem,  in runToolOnCodeWithArgs()
478       OverlayFileSystem(new llvm::vfs::OverlayFileSystem(std::move(BaseFS))),  in ClangTool()
481                   : new FileManager(FileSystemOptions(), OverlayFileSystem)) {  in ClangTool()
482   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in ClangTool()
487     Files->setVirtualFileSystem(OverlayFileSystem);  in ClangTool()
538     auto AbsPath = getAbsolutePath(*OverlayFileSystem, SourcePath);  in run()
550   if (auto CWD = OverlayFileSystem->getCurrentWorkingDirectory()) {  in run()
582       if (OverlayFileSystem->setCurrentWorkingDirectory(  in run()
634             OverlayFileSystem->setCurrentWorkingDirectory(InitialWorkingDir))  in run()
695   llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem(  in buildASTFromCodeWithArgs()  local
696       new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem()));  in buildASTFromCodeWithArgs()
699   OverlayFileSystem->pushOverlay(InMemoryFileSystem);  in buildASTFromCodeWithArgs()
701       new FileManager(FileSystemOptions(), OverlayFileSystem));  in buildASTFromCodeWithArgs()