//===--- ToolChains.cpp - ToolChain Implementations -----------------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "MSVC.h" #include "CommonArgs.h" #include "Darwin.h" #include "clang/Basic/CharInfo.h" #include "clang/Basic/Version.h" #include "clang/Driver/Compilation.h" #include "clang/Driver/Driver.h" #include "clang/Driver/DriverDiagnostic.h" #include "clang/Driver/Options.h" #include "clang/Driver/SanitizerArgs.h" #include "llvm/ADT/StringExtras.h" #include "llvm/ADT/StringSwitch.h" #include "llvm/Config/llvm-config.h" #include "llvm/Option/Arg.h" #include "llvm/Option/ArgList.h" #include "llvm/Support/ConvertUTF.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/FileSystem.h" #include "llvm/Support/Host.h" #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/Path.h" #include "llvm/Support/Process.h" #include // Include the necessary headers to interface with the Windows registry and // environment. #if defined(LLVM_ON_WIN32) #define USE_WIN32 #endif #ifdef USE_WIN32 #define WIN32_LEAN_AND_MEAN #define NOGDI #ifndef NOMINMAX #define NOMINMAX #endif #include #endif #ifdef _MSC_VER // Don't support SetupApi on MinGW. #define USE_MSVC_SETUP_API // Make sure this comes before MSVCSetupApi.h #include #include "MSVCSetupApi.h" #include "llvm/Support/COM.h" _COM_SMARTPTR_TYPEDEF(ISetupConfiguration, __uuidof(ISetupConfiguration)); _COM_SMARTPTR_TYPEDEF(ISetupConfiguration2, __uuidof(ISetupConfiguration2)); _COM_SMARTPTR_TYPEDEF(ISetupHelper, __uuidof(ISetupHelper)); _COM_SMARTPTR_TYPEDEF(IEnumSetupInstances, __uuidof(IEnumSetupInstances)); _COM_SMARTPTR_TYPEDEF(ISetupInstance, __uuidof(ISetupInstance)); _COM_SMARTPTR_TYPEDEF(ISetupInstance2, __uuidof(ISetupInstance2)); #endif using namespace clang::driver; using namespace clang::driver::toolchains; using namespace clang::driver::tools; using namespace clang; using namespace llvm::opt; // Defined below. // Forward declare this so there aren't too many things above the constructor. static bool getSystemRegistryString(const char *keyPath, const char *valueName, std::string &value, std::string *phValue); // Check various environment variables to try and find a toolchain. static bool findVCToolChainViaEnvironment(std::string &Path, MSVCToolChain::ToolsetLayout &VSLayout) { // These variables are typically set by vcvarsall.bat // when launching a developer command prompt. if (llvm::Optional VCToolsInstallDir = llvm::sys::Process::GetEnv("VCToolsInstallDir")) { // This is only set by newer Visual Studios, and it leads straight to // the toolchain directory. Path = std::move(*VCToolsInstallDir); VSLayout = MSVCToolChain::ToolsetLayout::VS2017OrNewer; return true; } if (llvm::Optional VCInstallDir = llvm::sys::Process::GetEnv("VCINSTALLDIR")) { // If the previous variable isn't set but this one is, then we've found // an older Visual Studio. This variable is set by newer Visual Studios too, // so this check has to appear second. // In older Visual Studios, the VC directory is the toolchain. Path = std::move(*VCInstallDir); VSLayout = MSVCToolChain::ToolsetLayout::OlderVS; return true; } // We couldn't find any VC environment variables. Let's walk through PATH and // see if it leads us to a VC toolchain bin directory. If it does, pick the // first one that we find. if (llvm::Optional PathEnv = llvm::sys::Process::GetEnv("PATH")) { llvm::SmallVector PathEntries; llvm::StringRef(*PathEnv).split(PathEntries, llvm::sys::EnvPathSeparator); for (llvm::StringRef PathEntry : PathEntries) { if (PathEntry.empty()) continue; llvm::SmallString<256> ExeTestPath; // If cl.exe doesn't exist, then this definitely isn't a VC toolchain. ExeTestPath = PathEntry; llvm::sys::path::append(ExeTestPath, "cl.exe"); if (!llvm::sys::fs::exists(ExeTestPath)) continue; // cl.exe existing isn't a conclusive test for a VC toolchain; clang also // has a cl.exe. So let's check for link.exe too. ExeTestPath = PathEntry; llvm::sys::path::append(ExeTestPath, "link.exe"); if (!llvm::sys::fs::exists(ExeTestPath)) continue; // whatever/VC/bin --> old toolchain, VC dir is toolchain dir. llvm::StringRef TestPath = PathEntry; bool IsBin = llvm::sys::path::filename(TestPath).equals_lower("bin"); if (!IsBin) { // Strip any architecture subdir like "amd64". TestPath = llvm::sys::path::parent_path(TestPath); IsBin = llvm::sys::path::filename(TestPath).equals_lower("bin"); } if (IsBin) { llvm::StringRef ParentPath = llvm::sys::path::parent_path(TestPath); llvm::StringRef ParentFilename = llvm::sys::path::filename(ParentPath); if (ParentFilename == "VC") { Path = ParentPath; VSLayout = MSVCToolChain::ToolsetLayout::OlderVS; return true; } if (ParentFilename == "x86ret" || ParentFilename == "x86chk" || ParentFilename == "amd64ret" || ParentFilename == "amd64chk") { Path = ParentPath; VSLayout = MSVCToolChain::ToolsetLayout::DevDivInternal; return true; } } else { // This could be a new (>=VS2017) toolchain. If it is, we should find // path components with these prefixes when walking backwards through // the path. // Note: empty strings match anything. llvm::StringRef ExpectedPrefixes[] = {"", "Host", "bin", "", "MSVC", "Tools", "VC"}; auto It = llvm::sys::path::rbegin(PathEntry); auto End = llvm::sys::path::rend(PathEntry); for (llvm::StringRef Prefix : ExpectedPrefixes) { if (It == End) goto NotAToolChain; if (!It->startswith(Prefix)) goto NotAToolChain; ++It; } // We've found a new toolchain! // Back up 3 times (/bin/Host/arch) to get the root path. llvm::StringRef ToolChainPath(PathEntry); for (int i = 0; i < 3; ++i) ToolChainPath = llvm::sys::path::parent_path(ToolChainPath); Path = ToolChainPath; VSLayout = MSVCToolChain::ToolsetLayout::VS2017OrNewer; return true; } NotAToolChain: continue; } } return false; } // Query the Setup Config server for installs, then pick the newest version // and find its default VC toolchain. // This is the preferred way to discover new Visual Studios, as they're no // longer listed in the registry. static bool findVCToolChainViaSetupConfig(std::string &Path, MSVCToolChain::ToolsetLayout &VSLayout) { #if !defined(USE_MSVC_SETUP_API) return false; #else // FIXME: This really should be done once in the top-level program's main // function, as it may have already been initialized with a different // threading model otherwise. llvm::sys::InitializeCOMRAII COM(llvm::sys::COMThreadingMode::SingleThreaded); HRESULT HR; // _com_ptr_t will throw a _com_error if a COM calls fail. // The LLVM coding standards forbid exception handling, so we'll have to // stop them from being thrown in the first place. // The destructor will put the regular error handler back when we leave // this scope. struct SuppressCOMErrorsRAII { static void __stdcall handler(HRESULT hr, IErrorInfo *perrinfo) {} SuppressCOMErrorsRAII() { _set_com_error_handler(handler); } ~SuppressCOMErrorsRAII() { _set_com_error_handler(_com_raise_error); } } COMErrorSuppressor; ISetupConfigurationPtr Query; HR = Query.CreateInstance(__uuidof(SetupConfiguration)); if (FAILED(HR)) return false; IEnumSetupInstancesPtr EnumInstances; HR = ISetupConfiguration2Ptr(Query)->EnumAllInstances(&EnumInstances); if (FAILED(HR)) return false; ISetupInstancePtr Instance; HR = EnumInstances->Next(1, &Instance, nullptr); if (HR != S_OK) return false; ISetupInstancePtr NewestInstance; Optional NewestVersionNum; do { bstr_t VersionString; uint64_t VersionNum; HR = Instance->GetInstallationVersion(VersionString.GetAddress()); if (FAILED(HR)) continue; HR = ISetupHelperPtr(Query)->ParseVersion(VersionString, &VersionNum); if (FAILED(HR)) continue; if (!NewestVersionNum || (VersionNum > NewestVersionNum)) { NewestInstance = Instance; NewestVersionNum = VersionNum; } } while ((HR = EnumInstances->Next(1, &Instance, nullptr)) == S_OK); if (!NewestInstance) return false; bstr_t VCPathWide; HR = NewestInstance->ResolvePath(L"VC", VCPathWide.GetAddress()); if (FAILED(HR)) return false; std::string VCRootPath; llvm::convertWideToUTF8(std::wstring(VCPathWide), VCRootPath); llvm::SmallString<256> ToolsVersionFilePath(VCRootPath); llvm::sys::path::append(ToolsVersionFilePath, "Auxiliary", "Build", "Microsoft.VCToolsVersion.default.txt"); auto ToolsVersionFile = llvm::MemoryBuffer::getFile(ToolsVersionFilePath); if (!ToolsVersionFile) return false; llvm::SmallString<256> ToolchainPath(VCRootPath); llvm::sys::path::append(ToolchainPath, "Tools", "MSVC", ToolsVersionFile->get()->getBuffer().rtrim()); if (!llvm::sys::fs::is_directory(ToolchainPath)) return false; Path = ToolchainPath.str(); VSLayout = MSVCToolChain::ToolsetLayout::VS2017OrNewer; return true; #endif } // Look in the registry for Visual Studio installs, and use that to get // a toolchain path. VS2017 and newer don't get added to the registry. // So if we find something here, we know that it's an older version. static bool findVCToolChainViaRegistry(std::string &Path, MSVCToolChain::ToolsetLayout &VSLayout) { std::string VSInstallPath; if (getSystemRegistryString(R"(SOFTWARE\Microsoft\VisualStudio\$VERSION)", "InstallDir", VSInstallPath, nullptr) || getSystemRegistryString(R"(SOFTWARE\Microsoft\VCExpress\$VERSION)", "InstallDir", VSInstallPath, nullptr)) { if (!VSInstallPath.empty()) { llvm::SmallString<256> VCPath(llvm::StringRef( VSInstallPath.c_str(), VSInstallPath.find(R"(\Common7\IDE)"))); llvm::sys::path::append(VCPath, "VC"); Path = VCPath.str(); VSLayout = MSVCToolChain::ToolsetLayout::OlderVS; return true; } } return false; } // Try to find Exe from a Visual Studio distribution. This first tries to find // an installed copy of Visual Studio and, failing that, looks in the PATH, // making sure that whatever executable that's found is not a same-named exe // from clang itself to prevent clang from falling back to itself. static std::string FindVisualStudioExecutable(const ToolChain &TC, const char *Exe) { const auto &MSVC = static_cast(TC); SmallString<128> FilePath(MSVC.getSubDirectoryPath( toolchains::MSVCToolChain::SubDirectoryType::Bin)); llvm::sys::path::append(FilePath, Exe); return llvm::sys::fs::can_execute(FilePath) ? FilePath.str() : Exe; } void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const ArgList &Args, const char *LinkingOutput) const { ArgStringList CmdArgs; auto &TC = static_cast(getToolChain()); assert((Output.isFilename() || Output.isNothing()) && "invalid output"); if (Output.isFilename()) CmdArgs.push_back( Args.MakeArgString(std::string("-out:") + Output.getFilename())); if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles) && !C.getDriver().IsCLMode()) CmdArgs.push_back("-defaultlib:libcmt"); if (!llvm::sys::Process::GetEnv("LIB")) { // If the VC environment hasn't been configured (perhaps because the user // did not run vcvarsall), try to build a consistent link environment. If // the environment variable is set however, assume the user knows what // they're doing. CmdArgs.push_back(Args.MakeArgString( Twine("-libpath:") + TC.getSubDirectoryPath( toolchains::MSVCToolChain::SubDirectoryType::Lib))); if (TC.useUniversalCRT()) { std::string UniversalCRTLibPath; if (TC.getUniversalCRTLibraryPath(UniversalCRTLibPath)) CmdArgs.push_back( Args.MakeArgString(Twine("-libpath:") + UniversalCRTLibPath)); } std::string WindowsSdkLibPath; if (TC.getWindowsSDKLibraryPath(WindowsSdkLibPath)) CmdArgs.push_back( Args.MakeArgString(std::string("-libpath:") + WindowsSdkLibPath)); } if (!C.getDriver().IsCLMode() && Args.hasArg(options::OPT_L)) for (const auto &LibPath : Args.getAllArgValues(options::OPT_L)) CmdArgs.push_back(Args.MakeArgString("-libpath:" + LibPath)); CmdArgs.push_back("-nologo"); if (Args.hasArg(options::OPT_g_Group, options::OPT__SLASH_Z7, options::OPT__SLASH_Zd)) CmdArgs.push_back("-debug"); bool DLL = Args.hasArg(options::OPT__SLASH_LD, options::OPT__SLASH_LDd, options::OPT_shared); if (DLL) { CmdArgs.push_back(Args.MakeArgString("-dll")); SmallString<128> ImplibName(Output.getFilename()); llvm::sys::path::replace_extension(ImplibName, "lib"); CmdArgs.push_back(Args.MakeArgString(std::string("-implib:") + ImplibName)); } if (TC.getSanitizerArgs().needsAsanRt()) { CmdArgs.push_back(Args.MakeArgString("-debug")); CmdArgs.push_back(Args.MakeArgString("-incremental:no")); if (TC.getSanitizerArgs().needsSharedAsanRt() || Args.hasArg(options::OPT__SLASH_MD, options::OPT__SLASH_MDd)) { for (const auto &Lib : {"asan_dynamic", "asan_dynamic_runtime_thunk"}) CmdArgs.push_back(TC.getCompilerRTArgString(Args, Lib)); // Make sure the dynamic runtime thunk is not optimized out at link time // to ensure proper SEH handling. CmdArgs.push_back(Args.MakeArgString( TC.getArch() == llvm::Triple::x86 ? "-include:___asan_seh_interceptor" : "-include:__asan_seh_interceptor")); // Make sure the linker consider all object files from the dynamic runtime // thunk. CmdArgs.push_back(Args.MakeArgString(std::string("-wholearchive:") + TC.getCompilerRT(Args, "asan_dynamic_runtime_thunk"))); } else if (DLL) { CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dll_thunk")); } else { for (const auto &Lib : {"asan", "asan_cxx"}) { CmdArgs.push_back(TC.getCompilerRTArgString(Args, Lib)); // Make sure the linker consider all object files from the static lib. // This is necessary because instrumented dlls need access to all the // interface exported by the static lib in the main executable. CmdArgs.push_back(Args.MakeArgString(std::string("-wholearchive:") + TC.getCompilerRT(Args, Lib))); } } } Args.AddAllArgValues(CmdArgs, options::OPT__SLASH_link); if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ, options::OPT_fno_openmp, false)) { CmdArgs.push_back("-nodefaultlib:vcomp.lib"); CmdArgs.push_back("-nodefaultlib:vcompd.lib"); CmdArgs.push_back(Args.MakeArgString(std::string("-libpath:") + TC.getDriver().Dir + "/../lib")); switch (TC.getDriver().getOpenMPRuntime(Args)) { case Driver::OMPRT_OMP: CmdArgs.push_back("-defaultlib:libomp.lib"); break; case Driver::OMPRT_IOMP5: CmdArgs.push_back("-defaultlib:libiomp5md.lib"); break; case Driver::OMPRT_GOMP: break; case Driver::OMPRT_Unknown: // Already diagnosed. break; } } // Add compiler-rt lib in case if it was explicitly // specified as an argument for --rtlib option. if (!Args.hasArg(options::OPT_nostdlib)) { AddRunTimeLibs(TC, TC.getDriver(), CmdArgs, Args); } // Add filenames, libraries, and other linker inputs. for (const auto &Input : Inputs) { if (Input.isFilename()) { CmdArgs.push_back(Input.getFilename()); continue; } const Arg &A = Input.getInputArg(); // Render -l options differently for the MSVC linker. if (A.getOption().matches(options::OPT_l)) { StringRef Lib = A.getValue(); const char *LinkLibArg; if (Lib.endswith(".lib")) LinkLibArg = Args.MakeArgString(Lib); else LinkLibArg = Args.MakeArgString(Lib + ".lib"); CmdArgs.push_back(LinkLibArg); continue; } // Otherwise, this is some other kind of linker input option like -Wl, -z, // or -L. Render it, even if MSVC doesn't understand it. A.renderAsInput(Args, CmdArgs); } TC.addProfileRTLibs(Args, CmdArgs); std::vector Environment; // We need to special case some linker paths. In the case of lld, we need to // translate 'lld' into 'lld-link', and in the case of the regular msvc // linker, we need to use a special search algorithm. llvm::SmallString<128> linkPath; StringRef Linker = Args.getLastArgValue(options::OPT_fuse_ld_EQ, "link"); if (Linker.equals_lower("lld")) Linker = "lld-link"; if (Linker.equals_lower("link")) { // If we're using the MSVC linker, it's not sufficient to just use link // from the program PATH, because other environments like GnuWin32 install // their own link.exe which may come first. linkPath = FindVisualStudioExecutable(TC, "link.exe"); #ifdef USE_WIN32 // When cross-compiling with VS2017 or newer, link.exe expects to have // its containing bin directory at the top of PATH, followed by the // native target bin directory. // e.g. when compiling for x86 on an x64 host, PATH should start with: // /bin/HostX64/x86;/bin/HostX64/x64 // This doesn't attempt to handle ToolsetLayout::DevDivInternal. if (TC.getIsVS2017OrNewer() && llvm::Triple(llvm::sys::getProcessTriple()).getArch() != TC.getArch()) { auto HostArch = llvm::Triple(llvm::sys::getProcessTriple()).getArch(); auto EnvBlockWide = std::unique_ptr( GetEnvironmentStringsW(), FreeEnvironmentStringsW); if (!EnvBlockWide) goto SkipSettingEnvironment; size_t EnvCount = 0; size_t EnvBlockLen = 0; while (EnvBlockWide[EnvBlockLen] != L'\0') { ++EnvCount; EnvBlockLen += std::wcslen(&EnvBlockWide[EnvBlockLen]) + 1 /*string null-terminator*/; } ++EnvBlockLen; // add the block null-terminator std::string EnvBlock; if (!llvm::convertUTF16ToUTF8String( llvm::ArrayRef(reinterpret_cast(EnvBlockWide.get()), EnvBlockLen * sizeof(EnvBlockWide[0])), EnvBlock)) goto SkipSettingEnvironment; Environment.reserve(EnvCount); // Now loop over each string in the block and copy them into the // environment vector, adjusting the PATH variable as needed when we // find it. for (const char *Cursor = EnvBlock.data(); *Cursor != '\0';) { llvm::StringRef EnvVar(Cursor); if (EnvVar.startswith_lower("path=")) { using SubDirectoryType = toolchains::MSVCToolChain::SubDirectoryType; constexpr size_t PrefixLen = 5; // strlen("path=") Environment.push_back(Args.MakeArgString( EnvVar.substr(0, PrefixLen) + TC.getSubDirectoryPath(SubDirectoryType::Bin) + llvm::Twine(llvm::sys::EnvPathSeparator) + TC.getSubDirectoryPath(SubDirectoryType::Bin, HostArch) + (EnvVar.size() > PrefixLen ? llvm::Twine(llvm::sys::EnvPathSeparator) + EnvVar.substr(PrefixLen) : ""))); } else { Environment.push_back(Args.MakeArgString(EnvVar)); } Cursor += EnvVar.size() + 1 /*null-terminator*/; } } SkipSettingEnvironment:; #endif } else { linkPath = TC.GetProgramPath(Linker.str().c_str()); } auto LinkCmd = llvm::make_unique( JA, *this, Args.MakeArgString(linkPath), CmdArgs, Inputs); if (!Environment.empty()) LinkCmd->setEnvironment(Environment); C.addCommand(std::move(LinkCmd)); } void visualstudio::Compiler::ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const ArgList &Args, const char *LinkingOutput) const { C.addCommand(GetCommand(C, JA, Output, Inputs, Args, LinkingOutput)); } std::unique_ptr visualstudio::Compiler::GetCommand( Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const ArgList &Args, const char *LinkingOutput) const { ArgStringList CmdArgs; CmdArgs.push_back("/nologo"); CmdArgs.push_back("/c"); // Compile only. CmdArgs.push_back("/W0"); // No warnings. // The goal is to be able to invoke this tool correctly based on // any flag accepted by clang-cl. // These are spelled the same way in clang and cl.exe,. Args.AddAllArgs(CmdArgs, {options::OPT_D, options::OPT_U, options::OPT_I}); // Optimization level. if (Arg *A = Args.getLastArg(options::OPT_fbuiltin, options::OPT_fno_builtin)) CmdArgs.push_back(A->getOption().getID() == options::OPT_fbuiltin ? "/Oi" : "/Oi-"); if (Arg *A = Args.getLastArg(options::OPT_O, options::OPT_O0)) { if (A->getOption().getID() == options::OPT_O0) { CmdArgs.push_back("/Od"); } else { CmdArgs.push_back("/Og"); StringRef OptLevel = A->getValue(); if (OptLevel == "s" || OptLevel == "z") CmdArgs.push_back("/Os"); else CmdArgs.push_back("/Ot"); CmdArgs.push_back("/Ob2"); } } if (Arg *A = Args.getLastArg(options::OPT_fomit_frame_pointer, options::OPT_fno_omit_frame_pointer)) CmdArgs.push_back(A->getOption().getID() == options::OPT_fomit_frame_pointer ? "/Oy" : "/Oy-"); if (!Args.hasArg(options::OPT_fwritable_strings)) CmdArgs.push_back("/GF"); // Flags for which clang-cl has an alias. // FIXME: How can we ensure this stays in sync with relevant clang-cl options? if (Args.hasFlag(options::OPT__SLASH_GR_, options::OPT__SLASH_GR, /*default=*/false)) CmdArgs.push_back("/GR-"); if (Args.hasFlag(options::OPT__SLASH_GS_, options::OPT__SLASH_GS, /*default=*/false)) CmdArgs.push_back("/GS-"); if (Arg *A = Args.getLastArg(options::OPT_ffunction_sections, options::OPT_fno_function_sections)) CmdArgs.push_back(A->getOption().getID() == options::OPT_ffunction_sections ? "/Gy" : "/Gy-"); if (Arg *A = Args.getLastArg(options::OPT_fdata_sections, options::OPT_fno_data_sections)) CmdArgs.push_back( A->getOption().getID() == options::OPT_fdata_sections ? "/Gw" : "/Gw-"); if (Args.hasArg(options::OPT_fsyntax_only)) CmdArgs.push_back("/Zs"); if (Args.hasArg(options::OPT_g_Flag, options::OPT_gline_tables_only, options::OPT__SLASH_Z7)) CmdArgs.push_back("/Z7"); std::vector Includes = Args.getAllArgValues(options::OPT_include); for (const auto &Include : Includes) CmdArgs.push_back(Args.MakeArgString(std::string("/FI") + Include)); // Flags that can simply be passed through. Args.AddAllArgs(CmdArgs, options::OPT__SLASH_LD); Args.AddAllArgs(CmdArgs, options::OPT__SLASH_LDd); Args.AddAllArgs(CmdArgs, options::OPT__SLASH_GX); Args.AddAllArgs(CmdArgs, options::OPT__SLASH_GX_); Args.AddAllArgs(CmdArgs, options::OPT__SLASH_EH); Args.AddAllArgs(CmdArgs, options::OPT__SLASH_Zl); // The order of these flags is relevant, so pick the last one. if (Arg *A = Args.getLastArg(options::OPT__SLASH_MD, options::OPT__SLASH_MDd, options::OPT__SLASH_MT, options::OPT__SLASH_MTd)) A->render(Args, CmdArgs); // Use MSVC's default threadsafe statics behaviour unless there was a flag. if (Arg *A = Args.getLastArg(options::OPT_fthreadsafe_statics, options::OPT_fno_threadsafe_statics)) { CmdArgs.push_back(A->getOption().getID() == options::OPT_fthreadsafe_statics ? "/Zc:threadSafeInit" : "/Zc:threadSafeInit-"); } // Pass through all unknown arguments so that the fallback command can see // them too. Args.AddAllArgs(CmdArgs, options::OPT_UNKNOWN); // Input filename. assert(Inputs.size() == 1); const InputInfo &II = Inputs[0]; assert(II.getType() == types::TY_C || II.getType() == types::TY_CXX); CmdArgs.push_back(II.getType() == types::TY_C ? "/Tc" : "/Tp"); if (II.isFilename()) CmdArgs.push_back(II.getFilename()); else II.getInputArg().renderAsInput(Args, CmdArgs); // Output filename. assert(Output.getType() == types::TY_Object); const char *Fo = Args.MakeArgString(std::string("/Fo") + Output.getFilename()); CmdArgs.push_back(Fo); std::string Exec = FindVisualStudioExecutable(getToolChain(), "cl.exe"); return llvm::make_unique(JA, *this, Args.MakeArgString(Exec), CmdArgs, Inputs); } MSVCToolChain::MSVCToolChain(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args) { getProgramPaths().push_back(getDriver().getInstalledDir()); if (getDriver().getInstalledDir() != getDriver().Dir) getProgramPaths().push_back(getDriver().Dir); // Check the environment first, since that's probably the user telling us // what they want to use. // Failing that, just try to find the newest Visual Studio version we can // and use its default VC toolchain. findVCToolChainViaEnvironment(VCToolChainPath, VSLayout) || findVCToolChainViaSetupConfig(VCToolChainPath, VSLayout) || findVCToolChainViaRegistry(VCToolChainPath, VSLayout); } Tool *MSVCToolChain::buildLinker() const { if (VCToolChainPath.empty()) getDriver().Diag(clang::diag::warn_drv_msvc_not_found); return new tools::visualstudio::Linker(*this); } Tool *MSVCToolChain::buildAssembler() const { if (getTriple().isOSBinFormatMachO()) return new tools::darwin::Assembler(*this); getDriver().Diag(clang::diag::err_no_external_assembler); return nullptr; } bool MSVCToolChain::IsIntegratedAssemblerDefault() const { return true; } bool MSVCToolChain::IsUnwindTablesDefault(const ArgList &Args) const { // Emit unwind tables by default on Win64. All non-x86_32 Windows platforms // such as ARM and PPC actually require unwind tables, but LLVM doesn't know // how to generate them yet. // Don't emit unwind tables by default for MachO targets. if (getTriple().isOSBinFormatMachO()) return false; return getArch() == llvm::Triple::x86_64; } bool MSVCToolChain::isPICDefault() const { return getArch() == llvm::Triple::x86_64; } bool MSVCToolChain::isPIEDefault() const { return false; } bool MSVCToolChain::isPICDefaultForced() const { return getArch() == llvm::Triple::x86_64; } void MSVCToolChain::AddCudaIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args); } void MSVCToolChain::printVerboseInfo(raw_ostream &OS) const { CudaInstallation.print(OS); } // Windows SDKs and VC Toolchains group their contents into subdirectories based // on the target architecture. This function converts an llvm::Triple::ArchType // to the corresponding subdirectory name. static const char *llvmArchToWindowsSDKArch(llvm::Triple::ArchType Arch) { using ArchType = llvm::Triple::ArchType; switch (Arch) { case ArchType::x86: return "x86"; case ArchType::x86_64: return "x64"; case ArchType::arm: return "arm"; default: return ""; } } // Similar to the above function, but for Visual Studios before VS2017. static const char *llvmArchToLegacyVCArch(llvm::Triple::ArchType Arch) { using ArchType = llvm::Triple::ArchType; switch (Arch) { case ArchType::x86: // x86 is default in legacy VC toolchains. // e.g. x86 libs are directly in /lib as opposed to /lib/x86. return ""; case ArchType::x86_64: return "amd64"; case ArchType::arm: return "arm"; default: return ""; } } // Similar to the above function, but for DevDiv internal builds. static const char *llvmArchToDevDivInternalArch(llvm::Triple::ArchType Arch) { using ArchType = llvm::Triple::ArchType; switch (Arch) { case ArchType::x86: return "i386"; case ArchType::x86_64: return "amd64"; case ArchType::arm: return "arm"; default: return ""; } } // Get the path to a specific subdirectory in the current toolchain for // a given target architecture. // VS2017 changed the VC toolchain layout, so this should be used instead // of hardcoding paths. std::string MSVCToolChain::getSubDirectoryPath(SubDirectoryType Type, llvm::Triple::ArchType TargetArch) const { const char *SubdirName; const char *IncludeName; switch (VSLayout) { case ToolsetLayout::OlderVS: SubdirName = llvmArchToLegacyVCArch(TargetArch); IncludeName = "include"; break; case ToolsetLayout::VS2017OrNewer: SubdirName = llvmArchToWindowsSDKArch(TargetArch); IncludeName = "include"; break; case ToolsetLayout::DevDivInternal: SubdirName = llvmArchToDevDivInternalArch(TargetArch); IncludeName = "inc"; break; } llvm::SmallString<256> Path(VCToolChainPath); switch (Type) { case SubDirectoryType::Bin: if (VSLayout == ToolsetLayout::VS2017OrNewer) { const bool HostIsX64 = llvm::Triple(llvm::sys::getProcessTriple()).isArch64Bit(); const char *const HostName = HostIsX64 ? "HostX64" : "HostX86"; llvm::sys::path::append(Path, "bin", HostName, SubdirName); } else { // OlderVS or DevDivInternal llvm::sys::path::append(Path, "bin", SubdirName); } break; case SubDirectoryType::Include: llvm::sys::path::append(Path, IncludeName); break; case SubDirectoryType::Lib: llvm::sys::path::append(Path, "lib", SubdirName); break; } return Path.str(); } #ifdef USE_WIN32 static bool readFullStringValue(HKEY hkey, const char *valueName, std::string &value) { std::wstring WideValueName; if (!llvm::ConvertUTF8toWide(valueName, WideValueName)) return false; DWORD result = 0; DWORD valueSize = 0; DWORD type = 0; // First just query for the required size. result = RegQueryValueExW(hkey, WideValueName.c_str(), NULL, &type, NULL, &valueSize); if (result != ERROR_SUCCESS || type != REG_SZ || !valueSize) return false; std::vector buffer(valueSize); result = RegQueryValueExW(hkey, WideValueName.c_str(), NULL, NULL, &buffer[0], &valueSize); if (result == ERROR_SUCCESS) { std::wstring WideValue(reinterpret_cast(buffer.data()), valueSize / sizeof(wchar_t)); if (valueSize && WideValue.back() == L'\0') { WideValue.pop_back(); } // The destination buffer must be empty as an invariant of the conversion // function; but this function is sometimes called in a loop that passes in // the same buffer, however. Simply clear it out so we can overwrite it. value.clear(); return llvm::convertWideToUTF8(WideValue, value); } return false; } #endif /// \brief Read registry string. /// This also supports a means to look for high-versioned keys by use /// of a $VERSION placeholder in the key path. /// $VERSION in the key path is a placeholder for the version number, /// causing the highest value path to be searched for and used. /// I.e. "SOFTWARE\\Microsoft\\VisualStudio\\$VERSION". /// There can be additional characters in the component. Only the numeric /// characters are compared. This function only searches HKLM. static bool getSystemRegistryString(const char *keyPath, const char *valueName, std::string &value, std::string *phValue) { #ifndef USE_WIN32 return false; #else HKEY hRootKey = HKEY_LOCAL_MACHINE; HKEY hKey = NULL; long lResult; bool returnValue = false; const char *placeHolder = strstr(keyPath, "$VERSION"); std::string bestName; // If we have a $VERSION placeholder, do the highest-version search. if (placeHolder) { const char *keyEnd = placeHolder - 1; const char *nextKey = placeHolder; // Find end of previous key. while ((keyEnd > keyPath) && (*keyEnd != '\\')) keyEnd--; // Find end of key containing $VERSION. while (*nextKey && (*nextKey != '\\')) nextKey++; size_t partialKeyLength = keyEnd - keyPath; char partialKey[256]; if (partialKeyLength >= sizeof(partialKey)) partialKeyLength = sizeof(partialKey) - 1; strncpy(partialKey, keyPath, partialKeyLength); partialKey[partialKeyLength] = '\0'; HKEY hTopKey = NULL; lResult = RegOpenKeyExA(hRootKey, partialKey, 0, KEY_READ | KEY_WOW64_32KEY, &hTopKey); if (lResult == ERROR_SUCCESS) { char keyName[256]; double bestValue = 0.0; DWORD index, size = sizeof(keyName) - 1; for (index = 0; RegEnumKeyExA(hTopKey, index, keyName, &size, NULL, NULL, NULL, NULL) == ERROR_SUCCESS; index++) { const char *sp = keyName; while (*sp && !isDigit(*sp)) sp++; if (!*sp) continue; const char *ep = sp + 1; while (*ep && (isDigit(*ep) || (*ep == '.'))) ep++; char numBuf[32]; strncpy(numBuf, sp, sizeof(numBuf) - 1); numBuf[sizeof(numBuf) - 1] = '\0'; double dvalue = strtod(numBuf, NULL); if (dvalue > bestValue) { // Test that InstallDir is indeed there before keeping this index. // Open the chosen key path remainder. bestName = keyName; // Append rest of key. bestName.append(nextKey); lResult = RegOpenKeyExA(hTopKey, bestName.c_str(), 0, KEY_READ | KEY_WOW64_32KEY, &hKey); if (lResult == ERROR_SUCCESS) { if (readFullStringValue(hKey, valueName, value)) { bestValue = dvalue; if (phValue) *phValue = bestName; returnValue = true; } RegCloseKey(hKey); } } size = sizeof(keyName) - 1; } RegCloseKey(hTopKey); } } else { lResult = RegOpenKeyExA(hRootKey, keyPath, 0, KEY_READ | KEY_WOW64_32KEY, &hKey); if (lResult == ERROR_SUCCESS) { if (readFullStringValue(hKey, valueName, value)) returnValue = true; if (phValue) phValue->clear(); RegCloseKey(hKey); } } return returnValue; #endif // USE_WIN32 } // Find the most recent version of Universal CRT or Windows 10 SDK. // vcvarsqueryregistry.bat from Visual Studio 2015 sorts entries in the include // directory by name and uses the last one of the list. // So we compare entry names lexicographically to find the greatest one. static bool getWindows10SDKVersionFromPath(const std::string &SDKPath, std::string &SDKVersion) { SDKVersion.clear(); std::error_code EC; llvm::SmallString<128> IncludePath(SDKPath); llvm::sys::path::append(IncludePath, "Include"); for (llvm::sys::fs::directory_iterator DirIt(IncludePath, EC), DirEnd; DirIt != DirEnd && !EC; DirIt.increment(EC)) { if (!llvm::sys::fs::is_directory(DirIt->path())) continue; StringRef CandidateName = llvm::sys::path::filename(DirIt->path()); // If WDK is installed, there could be subfolders like "wdf" in the // "Include" directory. // Allow only directories which names start with "10.". if (!CandidateName.startswith("10.")) continue; if (CandidateName > SDKVersion) SDKVersion = CandidateName; } return !SDKVersion.empty(); } /// \brief Get Windows SDK installation directory. static bool getWindowsSDKDir(std::string &Path, int &Major, std::string &WindowsSDKIncludeVersion, std::string &WindowsSDKLibVersion) { std::string RegistrySDKVersion; // Try the Windows registry. if (!getSystemRegistryString( "SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows\\$VERSION", "InstallationFolder", Path, &RegistrySDKVersion)) return false; if (Path.empty() || RegistrySDKVersion.empty()) return false; WindowsSDKIncludeVersion.clear(); WindowsSDKLibVersion.clear(); Major = 0; std::sscanf(RegistrySDKVersion.c_str(), "v%d.", &Major); if (Major <= 7) return true; if (Major == 8) { // Windows SDK 8.x installs libraries in a folder whose names depend on the // version of the OS you're targeting. By default choose the newest, which // usually corresponds to the version of the OS you've installed the SDK on. const char *Tests[] = {"winv6.3", "win8", "win7"}; for (const char *Test : Tests) { llvm::SmallString<128> TestPath(Path); llvm::sys::path::append(TestPath, "Lib", Test); if (llvm::sys::fs::exists(TestPath.c_str())) { WindowsSDKLibVersion = Test; break; } } return !WindowsSDKLibVersion.empty(); } if (Major == 10) { if (!getWindows10SDKVersionFromPath(Path, WindowsSDKIncludeVersion)) return false; WindowsSDKLibVersion = WindowsSDKIncludeVersion; return true; } // Unsupported SDK version return false; } // Gets the library path required to link against the Windows SDK. bool MSVCToolChain::getWindowsSDKLibraryPath(std::string &path) const { std::string sdkPath; int sdkMajor = 0; std::string windowsSDKIncludeVersion; std::string windowsSDKLibVersion; path.clear(); if (!getWindowsSDKDir(sdkPath, sdkMajor, windowsSDKIncludeVersion, windowsSDKLibVersion)) return false; llvm::SmallString<128> libPath(sdkPath); llvm::sys::path::append(libPath, "Lib"); if (sdkMajor >= 8) { llvm::sys::path::append(libPath, windowsSDKLibVersion, "um", llvmArchToWindowsSDKArch(getArch())); } else { switch (getArch()) { // In Windows SDK 7.x, x86 libraries are directly in the Lib folder. case llvm::Triple::x86: break; case llvm::Triple::x86_64: llvm::sys::path::append(libPath, "x64"); break; case llvm::Triple::arm: // It is not necessary to link against Windows SDK 7.x when targeting ARM. return false; default: return false; } } path = libPath.str(); return true; } // Check if the Include path of a specified version of Visual Studio contains // specific header files. If not, they are probably shipped with Universal CRT. bool MSVCToolChain::useUniversalCRT() const { llvm::SmallString<128> TestPath( getSubDirectoryPath(SubDirectoryType::Include)); llvm::sys::path::append(TestPath, "stdlib.h"); return !llvm::sys::fs::exists(TestPath); } static bool getUniversalCRTSdkDir(std::string &Path, std::string &UCRTVersion) { // vcvarsqueryregistry.bat for Visual Studio 2015 queries the registry // for the specific key "KitsRoot10". So do we. if (!getSystemRegistryString( "SOFTWARE\\Microsoft\\Windows Kits\\Installed Roots", "KitsRoot10", Path, nullptr)) return false; return getWindows10SDKVersionFromPath(Path, UCRTVersion); } bool MSVCToolChain::getUniversalCRTLibraryPath(std::string &Path) const { std::string UniversalCRTSdkPath; std::string UCRTVersion; Path.clear(); if (!getUniversalCRTSdkDir(UniversalCRTSdkPath, UCRTVersion)) return false; StringRef ArchName = llvmArchToWindowsSDKArch(getArch()); if (ArchName.empty()) return false; llvm::SmallString<128> LibPath(UniversalCRTSdkPath); llvm::sys::path::append(LibPath, "Lib", UCRTVersion, "ucrt", ArchName); Path = LibPath.str(); return true; } static VersionTuple getMSVCVersionFromTriple(const llvm::Triple &Triple) { unsigned Major, Minor, Micro; Triple.getEnvironmentVersion(Major, Minor, Micro); if (Major || Minor || Micro) return VersionTuple(Major, Minor, Micro); return VersionTuple(); } static VersionTuple getMSVCVersionFromExe(const std::string &BinDir) { VersionTuple Version; #ifdef USE_WIN32 SmallString<128> ClExe(BinDir); llvm::sys::path::append(ClExe, "cl.exe"); std::wstring ClExeWide; if (!llvm::ConvertUTF8toWide(ClExe.c_str(), ClExeWide)) return Version; const DWORD VersionSize = ::GetFileVersionInfoSizeW(ClExeWide.c_str(), nullptr); if (VersionSize == 0) return Version; SmallVector VersionBlock(VersionSize); if (!::GetFileVersionInfoW(ClExeWide.c_str(), 0, VersionSize, VersionBlock.data())) return Version; VS_FIXEDFILEINFO *FileInfo = nullptr; UINT FileInfoSize = 0; if (!::VerQueryValueW(VersionBlock.data(), L"\\", reinterpret_cast(&FileInfo), &FileInfoSize) || FileInfoSize < sizeof(*FileInfo)) return Version; const unsigned Major = (FileInfo->dwFileVersionMS >> 16) & 0xFFFF; const unsigned Minor = (FileInfo->dwFileVersionMS ) & 0xFFFF; const unsigned Micro = (FileInfo->dwFileVersionLS >> 16) & 0xFFFF; Version = VersionTuple(Major, Minor, Micro); #endif return Version; } void MSVCToolChain::AddSystemIncludeWithSubfolder( const ArgList &DriverArgs, ArgStringList &CC1Args, const std::string &folder, const Twine &subfolder1, const Twine &subfolder2, const Twine &subfolder3) const { llvm::SmallString<128> path(folder); llvm::sys::path::append(path, subfolder1, subfolder2, subfolder3); addSystemInclude(DriverArgs, CC1Args, path); } void MSVCToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { if (DriverArgs.hasArg(options::OPT_nostdinc)) return; if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, getDriver().ResourceDir, "include"); } // Add %INCLUDE%-like directories from the -imsvc flag. for (const auto &Path : DriverArgs.getAllArgValues(options::OPT__SLASH_imsvc)) addSystemInclude(DriverArgs, CC1Args, Path); if (DriverArgs.hasArg(options::OPT_nostdlibinc)) return; // Honor %INCLUDE%. It should know essential search paths with vcvarsall.bat. if (llvm::Optional cl_include_dir = llvm::sys::Process::GetEnv("INCLUDE")) { SmallVector Dirs; StringRef(*cl_include_dir) .split(Dirs, ";", /*MaxSplit=*/-1, /*KeepEmpty=*/false); for (StringRef Dir : Dirs) addSystemInclude(DriverArgs, CC1Args, Dir); if (!Dirs.empty()) return; } // When built with access to the proper Windows APIs, try to actually find // the correct include paths first. if (!VCToolChainPath.empty()) { addSystemInclude(DriverArgs, CC1Args, getSubDirectoryPath(SubDirectoryType::Include)); if (useUniversalCRT()) { std::string UniversalCRTSdkPath; std::string UCRTVersion; if (getUniversalCRTSdkDir(UniversalCRTSdkPath, UCRTVersion)) { AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, UniversalCRTSdkPath, "Include", UCRTVersion, "ucrt"); } } std::string WindowsSDKDir; int major; std::string windowsSDKIncludeVersion; std::string windowsSDKLibVersion; if (getWindowsSDKDir(WindowsSDKDir, major, windowsSDKIncludeVersion, windowsSDKLibVersion)) { if (major >= 8) { // Note: windowsSDKIncludeVersion is empty for SDKs prior to v10. // Anyway, llvm::sys::path::append is able to manage it. AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir, "include", windowsSDKIncludeVersion, "shared"); AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir, "include", windowsSDKIncludeVersion, "um"); AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir, "include", windowsSDKIncludeVersion, "winrt"); } else { AddSystemIncludeWithSubfolder(DriverArgs, CC1Args, WindowsSDKDir, "include"); } } return; } #if defined(LLVM_ON_WIN32) // As a fallback, select default install paths. // FIXME: Don't guess drives and paths like this on Windows. const StringRef Paths[] = { "C:/Program Files/Microsoft Visual Studio 10.0/VC/include", "C:/Program Files/Microsoft Visual Studio 9.0/VC/include", "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include", "C:/Program Files/Microsoft Visual Studio 8/VC/include", "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include" }; addSystemIncludes(DriverArgs, CC1Args, Paths); #endif } void MSVCToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { // FIXME: There should probably be logic here to find libc++ on Windows. } VersionTuple MSVCToolChain::computeMSVCVersion(const Driver *D, const ArgList &Args) const { bool IsWindowsMSVC = getTriple().isWindowsMSVCEnvironment(); VersionTuple MSVT = ToolChain::computeMSVCVersion(D, Args); if (MSVT.empty()) MSVT = getMSVCVersionFromTriple(getTriple()); if (MSVT.empty() && IsWindowsMSVC) MSVT = getMSVCVersionFromExe(getSubDirectoryPath(SubDirectoryType::Bin)); if (MSVT.empty() && Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions, IsWindowsMSVC)) { // -fms-compatibility-version=18.00 is default. // FIXME: Consider bumping this to 19 (MSVC2015) soon. MSVT = VersionTuple(18); } return MSVT; } std::string MSVCToolChain::ComputeEffectiveClangTriple(const ArgList &Args, types::ID InputType) const { // The MSVC version doesn't care about the architecture, even though it // may look at the triple internally. VersionTuple MSVT = computeMSVCVersion(/*D=*/nullptr, Args); MSVT = VersionTuple(MSVT.getMajor(), MSVT.getMinor().getValueOr(0), MSVT.getSubminor().getValueOr(0)); // For the rest of the triple, however, a computed architecture name may // be needed. llvm::Triple Triple(ToolChain::ComputeEffectiveClangTriple(Args, InputType)); if (Triple.getEnvironment() == llvm::Triple::MSVC) { StringRef ObjFmt = Triple.getEnvironmentName().split('-').second; if (ObjFmt.empty()) Triple.setEnvironmentName((Twine("msvc") + MSVT.getAsString()).str()); else Triple.setEnvironmentName( (Twine("msvc") + MSVT.getAsString() + Twine('-') + ObjFmt).str()); } return Triple.getTriple(); } SanitizerMask MSVCToolChain::getSupportedSanitizers() const { SanitizerMask Res = ToolChain::getSupportedSanitizers(); Res |= SanitizerKind::Address; return Res; } static void TranslateOptArg(Arg *A, llvm::opt::DerivedArgList &DAL, bool SupportsForcingFramePointer, const char *ExpandChar, const OptTable &Opts) { assert(A->getOption().matches(options::OPT__SLASH_O)); StringRef OptStr = A->getValue(); for (size_t I = 0, E = OptStr.size(); I != E; ++I) { const char &OptChar = *(OptStr.data() + I); switch (OptChar) { default: break; case '1': case '2': case 'x': case 'd': if (&OptChar == ExpandChar) { if (OptChar == 'd') { DAL.AddFlagArg(A, Opts.getOption(options::OPT_O0)); } else { if (OptChar == '1') { DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "s"); } else if (OptChar == '2' || OptChar == 'x') { DAL.AddFlagArg(A, Opts.getOption(options::OPT_fbuiltin)); DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "2"); } if (SupportsForcingFramePointer && !DAL.hasArgNoClaim(options::OPT_fno_omit_frame_pointer)) DAL.AddFlagArg(A, Opts.getOption(options::OPT_fomit_frame_pointer)); if (OptChar == '1' || OptChar == '2') DAL.AddFlagArg(A, Opts.getOption(options::OPT_ffunction_sections)); } } break; case 'b': if (I + 1 != E && isdigit(OptStr[I + 1])) { switch (OptStr[I + 1]) { case '0': DAL.AddFlagArg(A, Opts.getOption(options::OPT_fno_inline)); break; case '1': DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_hint_functions)); break; case '2': DAL.AddFlagArg(A, Opts.getOption(options::OPT_finline_functions)); break; } ++I; } break; case 'g': break; case 'i': if (I + 1 != E && OptStr[I + 1] == '-') { ++I; DAL.AddFlagArg(A, Opts.getOption(options::OPT_fno_builtin)); } else { DAL.AddFlagArg(A, Opts.getOption(options::OPT_fbuiltin)); } break; case 's': DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "s"); break; case 't': DAL.AddJoinedArg(A, Opts.getOption(options::OPT_O), "2"); break; case 'y': { bool OmitFramePointer = true; if (I + 1 != E && OptStr[I + 1] == '-') { OmitFramePointer = false; ++I; } if (SupportsForcingFramePointer) { if (OmitFramePointer) DAL.AddFlagArg(A, Opts.getOption(options::OPT_fomit_frame_pointer)); else DAL.AddFlagArg( A, Opts.getOption(options::OPT_fno_omit_frame_pointer)); } else { // Don't warn about /Oy- in 64-bit builds (where // SupportsForcingFramePointer is false). The flag having no effect // there is a compiler-internal optimization, and people shouldn't have // to special-case their build files for 64-bit clang-cl. A->claim(); } break; } } } } static void TranslateDArg(Arg *A, llvm::opt::DerivedArgList &DAL, const OptTable &Opts) { assert(A->getOption().matches(options::OPT_D)); StringRef Val = A->getValue(); size_t Hash = Val.find('#'); if (Hash == StringRef::npos || Hash > Val.find('=')) { DAL.append(A); return; } std::string NewVal = Val; NewVal[Hash] = '='; DAL.AddJoinedArg(A, Opts.getOption(options::OPT_D), NewVal); } llvm::opt::DerivedArgList * MSVCToolChain::TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch, Action::OffloadKind) const { DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs()); const OptTable &Opts = getDriver().getOpts(); // /Oy and /Oy- only has an effect under X86-32. bool SupportsForcingFramePointer = getArch() == llvm::Triple::x86; // The -O[12xd] flag actually expands to several flags. We must desugar the // flags so that options embedded can be negated. For example, the '-O2' flag // enables '-Oy'. Expanding '-O2' into its constituent flags allows us to // correctly handle '-O2 -Oy-' where the trailing '-Oy-' disables a single // aspect of '-O2'. // // Note that this expansion logic only applies to the *last* of '[12xd]'. // First step is to search for the character we'd like to expand. const char *ExpandChar = nullptr; for (Arg *A : Args) { if (!A->getOption().matches(options::OPT__SLASH_O)) continue; StringRef OptStr = A->getValue(); for (size_t I = 0, E = OptStr.size(); I != E; ++I) { char OptChar = OptStr[I]; char PrevChar = I > 0 ? OptStr[I - 1] : '0'; if (PrevChar == 'b') { // OptChar does not expand; it's an argument to the previous char. continue; } if (OptChar == '1' || OptChar == '2' || OptChar == 'x' || OptChar == 'd') ExpandChar = OptStr.data() + I; } } for (Arg *A : Args) { if (A->getOption().matches(options::OPT__SLASH_O)) { // The -O flag actually takes an amalgam of other options. For example, // '/Ogyb2' is equivalent to '/Og' '/Oy' '/Ob2'. TranslateOptArg(A, *DAL, SupportsForcingFramePointer, ExpandChar, Opts); } else if (A->getOption().matches(options::OPT_D)) { // Translate -Dfoo#bar into -Dfoo=bar. TranslateDArg(A, *DAL, Opts); } else { DAL->append(A); } } return DAL; }