100     std::optional<llvm::StringRef> WinSysRoot, std::string &Path, int &Major,  in getWindowsSDKDirViaCommandLine()  argument
102   if (WinSdkDir || WinSysRoot) {  in getWindowsSDKDirViaCommandLine()
109     if (WinSysRoot) {  in getWindowsSDKDirViaCommandLine()
110       llvm::SmallString<128> SDKPath(*WinSysRoot);  in getWindowsSDKDirViaCommandLine()
403                       std::optional<StringRef> WinSysRoot, std::string &Path,  in getWindowsSDKDir()  argument
407   if (getWindowsSDKDirViaCommandLine(VFS, WinSdkDir, WinSdkVersion, WinSysRoot,  in getWindowsSDKDir()
459                            std::optional<StringRef> WinSysRoot,  in getUniversalCRTSdkDir()  argument
464   if (getWindowsSDKDirViaCommandLine(VFS, WinSdkDir, WinSdkVersion, WinSysRoot,  in getUniversalCRTSdkDir()
484                                    std::optional<StringRef> WinSysRoot,  in findVCToolChainViaCommandLine()  argument
488   if (VCToolsDir || WinSysRoot) {  in findVCToolChainViaCommandLine()
489     if (WinSysRoot) {  in findVCToolChainViaCommandLine()
490       SmallString<128> ToolsPath(*WinSysRoot);  in findVCToolChainViaCommandLine()