clang/lib/Driver/ToolChain.cpp

   1 //===- ToolChain.cpp - Collections of tools for one platform --------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "clang/Driver/ToolChain.h"
  10 #include "ToolChains/Arch/ARM.h"
  11 #include "ToolChains/Clang.h"
  12 #include "ToolChains/Flang.h"
  13 #include "ToolChains/InterfaceStubs.h"
  14 #include "clang/Basic/ObjCRuntime.h"
  15 #include "clang/Basic/Sanitizers.h"
  16 #include "clang/Config/config.h"
  17 #include "clang/Driver/Action.h"
  18 #include "clang/Driver/Driver.h"
  19 #include "clang/Driver/DriverDiagnostic.h"
  20 #include "clang/Driver/InputInfo.h"
  21 #include "clang/Driver/Job.h"
  22 #include "clang/Driver/Options.h"
  23 #include "clang/Driver/SanitizerArgs.h"
  24 #include "clang/Driver/XRayArgs.h"
  25 #include "llvm/ADT/STLExtras.h"
  26 #include "llvm/ADT/SmallString.h"
  27 #include "llvm/ADT/StringRef.h"
  28 #include "llvm/ADT/Triple.h"
  29 #include "llvm/ADT/Twine.h"
  30 #include "llvm/Config/llvm-config.h"
  31 #include "llvm/MC/MCTargetOptions.h"
  32 #include "llvm/MC/TargetRegistry.h"
  33 #include "llvm/Option/Arg.h"
  34 #include "llvm/Option/ArgList.h"
  35 #include "llvm/Option/OptTable.h"
  36 #include "llvm/Option/Option.h"
  37 #include "llvm/Support/ErrorHandling.h"
  38 #include "llvm/Support/FileSystem.h"
  39 #include "llvm/Support/Path.h"
  40 #include "llvm/Support/TargetParser.h"
  41 #include "llvm/Support/VersionTuple.h"
  42 #include "llvm/Support/VirtualFileSystem.h"
  43 #include <cassert>
  44 #include <cstddef>
  45 #include <cstring>
  46 #include <string>
  47
  48 using namespace clang;
  49 using namespace driver;
  50 using namespace tools;
  51 using namespace llvm;
  52 using namespace llvm::opt;
  53
  54 static llvm::opt::Arg *GetRTTIArgument(const ArgList &Args) {
  55   return Args.getLastArg(options::OPT_mkernel, options::OPT_fapple_kext,
  56                          options::OPT_fno_rtti, options::OPT_frtti);
  57 }
  58
  59 static ToolChain::RTTIMode CalculateRTTIMode(const ArgList &Args,
  60                                              const llvm::Triple &Triple,
  61                                              const Arg *CachedRTTIArg) {
  62   // Explicit rtti/no-rtti args
  63   if (CachedRTTIArg) {
  64     if (CachedRTTIArg->getOption().matches(options::OPT_frtti))
  65       return ToolChain::RM_Enabled;
  66     else
  67       return ToolChain::RM_Disabled;
  68   }
  69
  70   // -frtti is default, except for the PS4/PS5 and DriverKit.
  71   bool NoRTTI = Triple.isPS() || Triple.isDriverKit();
  72   return NoRTTI ? ToolChain::RM_Disabled : ToolChain::RM_Enabled;
  73 }
  74
  75 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
  76                      const ArgList &Args)
  77     : D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)),
  78       CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) {
  79   auto addIfExists = [this](path_list &List, const std::string &Path) {
  80     if (getVFS().exists(Path))
  81       List.push_back(Path);
  82   };
  83
  84   for (const auto &Path : getRuntimePaths())
  85     addIfExists(getLibraryPaths(), Path);
  86   for (const auto &Path : getStdlibPaths())
  87     addIfExists(getFilePaths(), Path);
  88   addIfExists(getFilePaths(), getArchSpecificLibPath());
  89 }
  90
  91 void ToolChain::setTripleEnvironment(llvm::Triple::EnvironmentType Env) {
  92   Triple.setEnvironment(Env);
  93   if (EffectiveTriple != llvm::Triple())
  94     EffectiveTriple.setEnvironment(Env);
  95 }
  96
  97 ToolChain::~ToolChain() = default;
  98
  99 llvm::vfs::FileSystem &ToolChain::getVFS() const {
 100   return getDriver().getVFS();
 101 }
 102
 103 bool ToolChain::useIntegratedAs() const {
 104   return Args.hasFlag(options::OPT_fintegrated_as,
 105                       options::OPT_fno_integrated_as,
 106                       IsIntegratedAssemblerDefault());
 107 }
 108
 109 bool ToolChain::useIntegratedBackend() const {
 110   assert(
 111       ((IsIntegratedBackendDefault() && IsIntegratedBackendSupported()) ||
 112        (!IsIntegratedBackendDefault() || IsNonIntegratedBackendSupported())) &&
 113       "(Non-)integrated backend set incorrectly!");
 114
 115   bool IBackend = Args.hasFlag(options::OPT_fintegrated_objemitter,
 116                                options::OPT_fno_integrated_objemitter,
 117                                IsIntegratedBackendDefault());
 118
 119   // Diagnose when integrated-objemitter options are not supported by this
 120   // toolchain.
 121   unsigned DiagID;
 122   if ((IBackend && !IsIntegratedBackendSupported()) ||
 123       (!IBackend && !IsNonIntegratedBackendSupported()))
 124     DiagID = clang::diag::err_drv_unsupported_opt_for_target;
 125   else
 126     DiagID = clang::diag::warn_drv_unsupported_opt_for_target;
 127   Arg *A = Args.getLastArg(options::OPT_fno_integrated_objemitter);
 128   if (A && !IsNonIntegratedBackendSupported())
 129     D.Diag(DiagID) << A->getAsString(Args) << Triple.getTriple();
 130   A = Args.getLastArg(options::OPT_fintegrated_objemitter);
 131   if (A && !IsIntegratedBackendSupported())
 132     D.Diag(DiagID) << A->getAsString(Args) << Triple.getTriple();
 133
 134   return IBackend;
 135 }
 136
 137 bool ToolChain::useRelaxRelocations() const {
 138   return ENABLE_X86_RELAX_RELOCATIONS;
 139 }
 140
 141 bool ToolChain::defaultToIEEELongDouble() const {
 142   return PPC_LINUX_DEFAULT_IEEELONGDOUBLE && getTriple().isOSLinux();
 143 }
 144
 145 SanitizerArgs
 146 ToolChain::getSanitizerArgs(const llvm::opt::ArgList &JobArgs) const {
 147   SanitizerArgs SanArgs(*this, JobArgs, !SanitizerArgsChecked);
 148   SanitizerArgsChecked = true;
 149   return SanArgs;
 150 }
 151
 152 const XRayArgs& ToolChain::getXRayArgs() const {
 153   if (!XRayArguments.get())
 154     XRayArguments.reset(new XRayArgs(*this, Args));
 155   return *XRayArguments.get();
 156 }
 157
 158 namespace {
 159
 160 struct DriverSuffix {
 161   const char *Suffix;
 162   const char *ModeFlag;
 163 };
 164
 165 } // namespace
 166
 167 static const DriverSuffix *FindDriverSuffix(StringRef ProgName, size_t &Pos) {
 168   // A list of known driver suffixes. Suffixes are compared against the
 169   // program name in order. If there is a match, the frontend type is updated as
 170   // necessary by applying the ModeFlag.
 171   static const DriverSuffix DriverSuffixes[] = {
 172       {"clang", nullptr},
 173       {"clang++", "--driver-mode=g++"},
 174       {"clang-c++", "--driver-mode=g++"},
 175       {"clang-cc", nullptr},
 176       {"clang-cpp", "--driver-mode=cpp"},
 177       {"clang-g++", "--driver-mode=g++"},
 178       {"clang-gcc", nullptr},
 179       {"clang-cl", "--driver-mode=cl"},
 180       {"cc", nullptr},
 181       {"cpp", "--driver-mode=cpp"},
 182       {"cl", "--driver-mode=cl"},
 183       {"++", "--driver-mode=g++"},
 184       {"flang", "--driver-mode=flang"},
 185       {"clang-dxc", "--driver-mode=dxc"},
 186   };
 187
 188   for (const auto &DS : DriverSuffixes) {
 189     StringRef Suffix(DS.Suffix);
 190     if (ProgName.endswith(Suffix)) {
 191       Pos = ProgName.size() - Suffix.size();
 192       return &DS;
 193     }
 194   }
 195   return nullptr;
 196 }
 197
 198 /// Normalize the program name from argv[0] by stripping the file extension if
 199 /// present and lower-casing the string on Windows.
 200 static std::string normalizeProgramName(llvm::StringRef Argv0) {
 201   std::string ProgName = std::string(llvm::sys::path::stem(Argv0));
 202   if (is_style_windows(llvm::sys::path::Style::native)) {
 203     // Transform to lowercase for case insensitive file systems.
 204     std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(),
 205                    ::tolower);
 206   }
 207   return ProgName;
 208 }
 209
 210 static const DriverSuffix *parseDriverSuffix(StringRef ProgName, size_t &Pos) {
 211   // Try to infer frontend type and default target from the program name by
 212   // comparing it against DriverSuffixes in order.
 213
 214   // If there is a match, the function tries to identify a target as prefix.
 215   // E.g. "x86_64-linux-clang" as interpreted as suffix "clang" with target
 216   // prefix "x86_64-linux". If such a target prefix is found, it may be
 217   // added via -target as implicit first argument.
 218   const DriverSuffix *DS = FindDriverSuffix(ProgName, Pos);
 219
 220   if (!DS) {
 221     // Try again after stripping any trailing version number:
 222     // clang++3.5 -> clang++
 223     ProgName = ProgName.rtrim("0123456789.");
 224     DS = FindDriverSuffix(ProgName, Pos);
 225   }
 226
 227   if (!DS) {
 228     // Try again after stripping trailing -component.
 229     // clang++-tot -> clang++
 230     ProgName = ProgName.slice(0, ProgName.rfind('-'));
 231     DS = FindDriverSuffix(ProgName, Pos);
 232   }
 233   return DS;
 234 }
 235
 236 ParsedClangName
 237 ToolChain::getTargetAndModeFromProgramName(StringRef PN) {
 238   std::string ProgName = normalizeProgramName(PN);
 239   size_t SuffixPos;
 240   const DriverSuffix *DS = parseDriverSuffix(ProgName, SuffixPos);
 241   if (!DS)
 242     return {};
 243   size_t SuffixEnd = SuffixPos + strlen(DS->Suffix);
 244
 245   size_t LastComponent = ProgName.rfind('-', SuffixPos);
 246   if (LastComponent == std::string::npos)
 247     return ParsedClangName(ProgName.substr(0, SuffixEnd), DS->ModeFlag);
 248   std::string ModeSuffix = ProgName.substr(LastComponent + 1,
 249                                            SuffixEnd - LastComponent - 1);
 250
 251   // Infer target from the prefix.
 252   StringRef Prefix(ProgName);
 253   Prefix = Prefix.slice(0, LastComponent);
 254   std::string IgnoredError;
 255   bool IsRegistered =
 256       llvm::TargetRegistry::lookupTarget(std::string(Prefix), IgnoredError);
 257   return ParsedClangName{std::string(Prefix), ModeSuffix, DS->ModeFlag,
 258                          IsRegistered};
 259 }
 260
 261 StringRef ToolChain::getDefaultUniversalArchName() const {
 262   // In universal driver terms, the arch name accepted by -arch isn't exactly
 263   // the same as the ones that appear in the triple. Roughly speaking, this is
 264   // an inverse of the darwin::getArchTypeForDarwinArchName() function.
 265   switch (Triple.getArch()) {
 266   case llvm::Triple::aarch64: {
 267     if (getTriple().isArm64e())
 268       return "arm64e";
 269     return "arm64";
 270   }
 271   case llvm::Triple::aarch64_32:
 272     return "arm64_32";
 273   case llvm::Triple::ppc:
 274     return "ppc";
 275   case llvm::Triple::ppcle:
 276     return "ppcle";
 277   case llvm::Triple::ppc64:
 278     return "ppc64";
 279   case llvm::Triple::ppc64le:
 280     return "ppc64le";
 281   default:
 282     return Triple.getArchName();
 283   }
 284 }
 285
 286 std::string ToolChain::getInputFilename(const InputInfo &Input) const {
 287   return Input.getFilename();
 288 }
 289
 290 bool ToolChain::IsUnwindTablesDefault(const ArgList &Args) const {
 291   return false;
 292 }
 293
 294 Tool *ToolChain::getClang() const {
 295   if (!Clang)
 296     Clang.reset(new tools::Clang(*this, useIntegratedBackend()));
 297   return Clang.get();
 298 }
 299
 300 Tool *ToolChain::getFlang() const {
 301   if (!Flang)
 302     Flang.reset(new tools::Flang(*this));
 303   return Flang.get();
 304 }
 305
 306 Tool *ToolChain::buildAssembler() const {
 307   return new tools::ClangAs(*this);
 308 }
 309
 310 Tool *ToolChain::buildLinker() const {
 311   llvm_unreachable("Linking is not supported by this toolchain");
 312 }
 313
 314 Tool *ToolChain::buildStaticLibTool() const {
 315   llvm_unreachable("Creating static lib is not supported by this toolchain");
 316 }
 317
 318 Tool *ToolChain::getAssemble() const {
 319   if (!Assemble)
 320     Assemble.reset(buildAssembler());
 321   return Assemble.get();
 322 }
 323
 324 Tool *ToolChain::getClangAs() const {
 325   if (!Assemble)
 326     Assemble.reset(new tools::ClangAs(*this));
 327   return Assemble.get();
 328 }
 329
 330 Tool *ToolChain::getLink() const {
 331   if (!Link)
 332     Link.reset(buildLinker());
 333   return Link.get();
 334 }
 335
 336 Tool *ToolChain::getStaticLibTool() const {
 337   if (!StaticLibTool)
 338     StaticLibTool.reset(buildStaticLibTool());
 339   return StaticLibTool.get();
 340 }
 341
 342 Tool *ToolChain::getIfsMerge() const {
 343   if (!IfsMerge)
 344     IfsMerge.reset(new tools::ifstool::Merger(*this));
 345   return IfsMerge.get();
 346 }
 347
 348 Tool *ToolChain::getOffloadBundler() const {
 349   if (!OffloadBundler)
 350     OffloadBundler.reset(new tools::OffloadBundler(*this));
 351   return OffloadBundler.get();
 352 }
 353
 354 Tool *ToolChain::getOffloadPackager() const {
 355   if (!OffloadPackager)
 356     OffloadPackager.reset(new tools::OffloadPackager(*this));
 357   return OffloadPackager.get();
 358 }
 359
 360 Tool *ToolChain::getLinkerWrapper() const {
 361   if (!LinkerWrapper)
 362     LinkerWrapper.reset(new tools::LinkerWrapper(*this, getLink()));
 363   return LinkerWrapper.get();
 364 }
 365
 366 Tool *ToolChain::getTool(Action::ActionClass AC) const {
 367   switch (AC) {
 368   case Action::AssembleJobClass:
 369     return getAssemble();
 370
 371   case Action::IfsMergeJobClass:
 372     return getIfsMerge();
 373
 374   case Action::LinkJobClass:
 375     return getLink();
 376
 377   case Action::StaticLibJobClass:
 378     return getStaticLibTool();
 379
 380   case Action::InputClass:
 381   case Action::BindArchClass:
 382   case Action::OffloadClass:
 383   case Action::LipoJobClass:
 384   case Action::DsymutilJobClass:
 385   case Action::VerifyDebugInfoJobClass:
 386     llvm_unreachable("Invalid tool kind.");
 387
 388   case Action::CompileJobClass:
 389   case Action::PrecompileJobClass:
 390   case Action::HeaderModulePrecompileJobClass:
 391   case Action::PreprocessJobClass:
 392   case Action::ExtractAPIJobClass:
 393   case Action::AnalyzeJobClass:
 394   case Action::MigrateJobClass:
 395   case Action::VerifyPCHJobClass:
 396   case Action::BackendJobClass:
 397     return getClang();
 398
 399   case Action::OffloadBundlingJobClass:
 400   case Action::OffloadUnbundlingJobClass:
 401     return getOffloadBundler();
 402
 403   case Action::OffloadPackagerJobClass:
 404     return getOffloadPackager();
 405   case Action::LinkerWrapperJobClass:
 406     return getLinkerWrapper();
 407   }
 408
 409   llvm_unreachable("Invalid tool kind.");
 410 }
 411
 412 static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
 413                                              const ArgList &Args) {
 414   const llvm::Triple &Triple = TC.getTriple();
 415   bool IsWindows = Triple.isOSWindows();
 416
 417   if (TC.isBareMetal())
 418     return Triple.getArchName();
 419
 420   if (TC.getArch() == llvm::Triple::arm || TC.getArch() == llvm::Triple::armeb)
 421     return (arm::getARMFloatABI(TC, Args) == arm::FloatABI::Hard && !IsWindows)
 422                ? "armhf"
 423                : "arm";
 424
 425   // For historic reasons, Android library is using i686 instead of i386.
 426   if (TC.getArch() == llvm::Triple::x86 && Triple.isAndroid())
 427     return "i686";
 428
 429   if (TC.getArch() == llvm::Triple::x86_64 && Triple.isX32())
 430     return "x32";
 431
 432   return llvm::Triple::getArchTypeName(TC.getArch());
 433 }
 434
 435 StringRef ToolChain::getOSLibName() const {
 436   if (Triple.isOSDarwin())
 437     return "darwin";
 438
 439   switch (Triple.getOS()) {
 440   case llvm::Triple::FreeBSD:
 441     return "freebsd";
 442   case llvm::Triple::NetBSD:
 443     return "netbsd";
 444   case llvm::Triple::OpenBSD:
 445     return "openbsd";
 446   case llvm::Triple::Solaris:
 447     return "sunos";
 448   case llvm::Triple::AIX:
 449     return "aix";
 450   default:
 451     return getOS();
 452   }
 453 }
 454
 455 std::string ToolChain::getCompilerRTPath() const {
 456   SmallString<128> Path(getDriver().ResourceDir);
 457   if (isBareMetal()) {
 458     llvm::sys::path::append(Path, "lib", getOSLibName());
 459     Path += SelectedMultilib.gccSuffix();
 460   } else if (Triple.isOSUnknown()) {
 461     llvm::sys::path::append(Path, "lib");
 462   } else {
 463     llvm::sys::path::append(Path, "lib", getOSLibName());
 464   }
 465   return std::string(Path.str());
 466 }
 467
 468 std::string ToolChain::getCompilerRTBasename(const ArgList &Args,
 469                                              StringRef Component,
 470                                              FileType Type) const {
 471   std::string CRTAbsolutePath = getCompilerRT(Args, Component, Type);
 472   return llvm::sys::path::filename(CRTAbsolutePath).str();
 473 }
 474
 475 std::string ToolChain::buildCompilerRTBasename(const llvm::opt::ArgList &Args,
 476                                                StringRef Component,
 477                                                FileType Type,
 478                                                bool AddArch) const {
 479   const llvm::Triple &TT = getTriple();
 480   bool IsITANMSVCWindows =
 481       TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment();
 482
 483   const char *Prefix =
 484       IsITANMSVCWindows || Type == ToolChain::FT_Object ? "" : "lib";
 485   const char *Suffix;
 486   switch (Type) {
 487   case ToolChain::FT_Object:
 488     Suffix = IsITANMSVCWindows ? ".obj" : ".o";
 489     break;
 490   case ToolChain::FT_Static:
 491     Suffix = IsITANMSVCWindows ? ".lib" : ".a";
 492     break;
 493   case ToolChain::FT_Shared:
 494     Suffix = TT.isOSWindows()
 495                  ? (TT.isWindowsGNUEnvironment() ? ".dll.a" : ".lib")
 496                  : ".so";
 497     break;
 498   }
 499
 500   std::string ArchAndEnv;
 501   if (AddArch) {
 502     StringRef Arch = getArchNameForCompilerRTLib(*this, Args);
 503     const char *Env = TT.isAndroid() ? "-android" : "";
 504     ArchAndEnv = ("-" + Arch + Env).str();
 505   }
 506   return (Prefix + Twine("clang_rt.") + Component + ArchAndEnv + Suffix).str();
 507 }
 508
 509 std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef Component,
 510                                      FileType Type) const {
 511   // Check for runtime files in the new layout without the architecture first.
 512   std::string CRTBasename =
 513       buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/false);
 514   for (const auto &LibPath : getLibraryPaths()) {
 515     SmallString<128> P(LibPath);
 516     llvm::sys::path::append(P, CRTBasename);
 517     if (getVFS().exists(P))
 518       return std::string(P.str());
 519   }
 520
 521   // Fall back to the old expected compiler-rt name if the new one does not
 522   // exist.
 523   CRTBasename =
 524       buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/true);
 525   SmallString<128> Path(getCompilerRTPath());
 526   llvm::sys::path::append(Path, CRTBasename);
 527   return std::string(Path.str());
 528 }
 529
 530 const char *ToolChain::getCompilerRTArgString(const llvm::opt::ArgList &Args,
 531                                               StringRef Component,
 532                                               FileType Type) const {
 533   return Args.MakeArgString(getCompilerRT(Args, Component, Type));
 534 }
 535
 536 ToolChain::path_list ToolChain::getRuntimePaths() const {
 537   path_list Paths;
 538   auto addPathForTriple = [this, &Paths](const llvm::Triple &Triple) {
 539     SmallString<128> P(D.ResourceDir);
 540     llvm::sys::path::append(P, "lib", Triple.str());
 541     Paths.push_back(std::string(P.str()));
 542   };
 543
 544   addPathForTriple(getTriple());
 545
 546   // Android targets may include an API level at the end. We still want to fall
 547   // back on a path without the API level.
 548   if (getTriple().isAndroid() &&
 549       getTriple().getEnvironmentName() != "android") {
 550     llvm::Triple TripleWithoutLevel = getTriple();
 551     TripleWithoutLevel.setEnvironmentName("android");
 552     addPathForTriple(TripleWithoutLevel);
 553   }
 554
 555   return Paths;
 556 }
 557
 558 ToolChain::path_list ToolChain::getStdlibPaths() const {
 559   path_list Paths;
 560   SmallString<128> P(D.Dir);
 561   llvm::sys::path::append(P, "..", "lib", getTripleString());
 562   Paths.push_back(std::string(P.str()));
 563
 564   return Paths;
 565 }
 566
 567 std::string ToolChain::getArchSpecificLibPath() const {
 568   SmallString<128> Path(getDriver().ResourceDir);
 569   llvm::sys::path::append(Path, "lib", getOSLibName(),
 570                           llvm::Triple::getArchTypeName(getArch()));
 571   return std::string(Path.str());
 572 }
 573
 574 bool ToolChain::needsProfileRT(const ArgList &Args) {
 575   if (Args.hasArg(options::OPT_noprofilelib))
 576     return false;
 577
 578   return Args.hasArg(options::OPT_fprofile_generate) ||
 579          Args.hasArg(options::OPT_fprofile_generate_EQ) ||
 580          Args.hasArg(options::OPT_fcs_profile_generate) ||
 581          Args.hasArg(options::OPT_fcs_profile_generate_EQ) ||
 582          Args.hasArg(options::OPT_fprofile_instr_generate) ||
 583          Args.hasArg(options::OPT_fprofile_instr_generate_EQ) ||
 584          Args.hasArg(options::OPT_fcreate_profile) ||
 585          Args.hasArg(options::OPT_forder_file_instrumentation);
 586 }
 587
 588 bool ToolChain::needsGCovInstrumentation(const llvm::opt::ArgList &Args) {
 589   return Args.hasArg(options::OPT_coverage) ||
 590          Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
 591                       false);
 592 }
 593
 594 Tool *ToolChain::SelectTool(const JobAction &JA) const {
 595   if (D.IsFlangMode() && getDriver().ShouldUseFlangCompiler(JA)) return getFlang();
 596   if (getDriver().ShouldUseClangCompiler(JA)) return getClang();
 597   Action::ActionClass AC = JA.getKind();
 598   if (AC == Action::AssembleJobClass && useIntegratedAs())
 599     return getClangAs();
 600   return getTool(AC);
 601 }
 602
 603 std::string ToolChain::GetFilePath(const char *Name) const {
 604   return D.GetFilePath(Name, *this);
 605 }
 606
 607 std::string ToolChain::GetProgramPath(const char *Name) const {
 608   return D.GetProgramPath(Name, *this);
 609 }
 610
 611 std::string ToolChain::GetLinkerPath(bool *LinkerIsLLD) const {
 612   if (LinkerIsLLD)
 613     *LinkerIsLLD = false;
 614
 615   // Get -fuse-ld= first to prevent -Wunused-command-line-argument. -fuse-ld= is
 616   // considered as the linker flavor, e.g. "bfd", "gold", or "lld".
 617   const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ);
 618   StringRef UseLinker = A ? A->getValue() : CLANG_DEFAULT_LINKER;
 619
 620   // --ld-path= takes precedence over -fuse-ld= and specifies the executable
 621   // name. -B, COMPILER_PATH and PATH and consulted if the value does not
 622   // contain a path component separator.
 623   if (const Arg *A = Args.getLastArg(options::OPT_ld_path_EQ)) {
 624     std::string Path(A->getValue());
 625     if (!Path.empty()) {
 626       if (llvm::sys::path::parent_path(Path).empty())
 627         Path = GetProgramPath(A->getValue());
 628       if (llvm::sys::fs::can_execute(Path))
 629         return std::string(Path);
 630     }
 631     getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
 632     return GetProgramPath(getDefaultLinker());
 633   }
 634   // If we're passed -fuse-ld= with no argument, or with the argument ld,
 635   // then use whatever the default system linker is.
 636   if (UseLinker.empty() || UseLinker == "ld") {
 637     const char *DefaultLinker = getDefaultLinker();
 638     if (llvm::sys::path::is_absolute(DefaultLinker))
 639       return std::string(DefaultLinker);
 640     else
 641       return GetProgramPath(DefaultLinker);
 642   }
 643
 644   // Extending -fuse-ld= to an absolute or relative path is unexpected. Checking
 645   // for the linker flavor is brittle. In addition, prepending "ld." or "ld64."
 646   // to a relative path is surprising. This is more complex due to priorities
 647   // among -B, COMPILER_PATH and PATH. --ld-path= should be used instead.
 648   if (UseLinker.contains('/'))
 649     getDriver().Diag(diag::warn_drv_fuse_ld_path);
 650
 651   if (llvm::sys::path::is_absolute(UseLinker)) {
 652     // If we're passed what looks like an absolute path, don't attempt to
 653     // second-guess that.
 654     if (llvm::sys::fs::can_execute(UseLinker))
 655       return std::string(UseLinker);
 656   } else {
 657     llvm::SmallString<8> LinkerName;
 658     if (Triple.isOSDarwin())
 659       LinkerName.append("ld64.");
 660     else
 661       LinkerName.append("ld.");
 662     LinkerName.append(UseLinker);
 663
 664     std::string LinkerPath(GetProgramPath(LinkerName.c_str()));
 665     if (llvm::sys::fs::can_execute(LinkerPath)) {
 666       if (LinkerIsLLD)
 667         *LinkerIsLLD = UseLinker == "lld";
 668       return LinkerPath;
 669     }
 670   }
 671
 672   if (A)
 673     getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
 674
 675   return GetProgramPath(getDefaultLinker());
 676 }
 677
 678 std::string ToolChain::GetStaticLibToolPath() const {
 679   // TODO: Add support for static lib archiving on Windows
 680   if (Triple.isOSDarwin())
 681     return GetProgramPath("libtool");
 682   return GetProgramPath("llvm-ar");
 683 }
 684
 685 types::ID ToolChain::LookupTypeForExtension(StringRef Ext) const {
 686   types::ID id = types::lookupTypeForExtension(Ext);
 687
 688   // Flang always runs the preprocessor and has no notion of "preprocessed
 689   // fortran". Here, TY_PP_Fortran is coerced to TY_Fortran to avoid treating
 690   // them differently.
 691   if (D.IsFlangMode() && id == types::TY_PP_Fortran)
 692     id = types::TY_Fortran;
 693
 694   return id;
 695 }
 696
 697 bool ToolChain::HasNativeLLVMSupport() const {
 698   return false;
 699 }
 700
 701 bool ToolChain::isCrossCompiling() const {
 702   llvm::Triple HostTriple(LLVM_HOST_TRIPLE);
 703   switch (HostTriple.getArch()) {
 704   // The A32/T32/T16 instruction sets are not separate architectures in this
 705   // context.
 706   case llvm::Triple::arm:
 707   case llvm::Triple::armeb:
 708   case llvm::Triple::thumb:
 709   case llvm::Triple::thumbeb:
 710     return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb &&
 711            getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb;
 712   default:
 713     return HostTriple.getArch() != getArch();
 714   }
 715 }
 716
 717 ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
 718   return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
 719                      VersionTuple());
 720 }
 721
 722 llvm::ExceptionHandling
 723 ToolChain::GetExceptionModel(const llvm::opt::ArgList &Args) const {
 724   return llvm::ExceptionHandling::None;
 725 }
 726
 727 bool ToolChain::isThreadModelSupported(const StringRef Model) const {
 728   if (Model == "single") {
 729     // FIXME: 'single' is only supported on ARM and WebAssembly so far.
 730     return Triple.getArch() == llvm::Triple::arm ||
 731            Triple.getArch() == llvm::Triple::armeb ||
 732            Triple.getArch() == llvm::Triple::thumb ||
 733            Triple.getArch() == llvm::Triple::thumbeb || Triple.isWasm();
 734   } else if (Model == "posix")
 735     return true;
 736
 737   return false;
 738 }
 739
 740 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
 741                                          types::ID InputType) const {
 742   switch (getTriple().getArch()) {
 743   default:
 744     return getTripleString();
 745
 746   case llvm::Triple::x86_64: {
 747     llvm::Triple Triple = getTriple();
 748     if (!Triple.isOSBinFormatMachO())
 749       return getTripleString();
 750
 751     if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
 752       // x86_64h goes in the triple. Other -march options just use the
 753       // vanilla triple we already have.
 754       StringRef MArch = A->getValue();
 755       if (MArch == "x86_64h")
 756         Triple.setArchName(MArch);
 757     }
 758     return Triple.getTriple();
 759   }
 760   case llvm::Triple::aarch64: {
 761     llvm::Triple Triple = getTriple();
 762     if (!Triple.isOSBinFormatMachO())
 763       return getTripleString();
 764
 765     if (Triple.isArm64e())
 766       return getTripleString();
 767
 768     // FIXME: older versions of ld64 expect the "arm64" component in the actual
 769     // triple string and query it to determine whether an LTO file can be
 770     // handled. Remove this when we don't care any more.
 771     Triple.setArchName("arm64");
 772     return Triple.getTriple();
 773   }
 774   case llvm::Triple::aarch64_32:
 775     return getTripleString();
 776   case llvm::Triple::arm:
 777   case llvm::Triple::armeb:
 778   case llvm::Triple::thumb:
 779   case llvm::Triple::thumbeb: {
 780     llvm::Triple Triple = getTriple();
 781     tools::arm::setArchNameInTriple(getDriver(), Args, InputType, Triple);
 782     tools::arm::setFloatABIInTriple(getDriver(), Args, Triple);
 783     return Triple.getTriple();
 784   }
 785   }
 786 }
 787
 788 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
 789                                                    types::ID InputType) const {
 790   return ComputeLLVMTriple(Args, InputType);
 791 }
 792
 793 std::string ToolChain::computeSysRoot() const {
 794   return D.SysRoot;
 795 }
 796
 797 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 798                                           ArgStringList &CC1Args) const {
 799   // Each toolchain should provide the appropriate include flags.
 800 }
 801
 802 void ToolChain::addClangTargetOptions(
 803     const ArgList &DriverArgs, ArgStringList &CC1Args,
 804     Action::OffloadKind DeviceOffloadKind) const {}
 805
 806 void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
 807
 808 void ToolChain::addProfileRTLibs(const llvm::opt::ArgList &Args,
 809                                  llvm::opt::ArgStringList &CmdArgs) const {
 810   if (!needsProfileRT(Args) && !needsGCovInstrumentation(Args))
 811     return;
 812
 813   CmdArgs.push_back(getCompilerRTArgString(Args, "profile"));
 814 }
 815
 816 ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
 817     const ArgList &Args) const {
 818   if (runtimeLibType)
 819     return *runtimeLibType;
 820
 821   const Arg* A = Args.getLastArg(options::OPT_rtlib_EQ);
 822   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_RTLIB;
 823
 824   // Only use "platform" in tests to override CLANG_DEFAULT_RTLIB!
 825   if (LibName == "compiler-rt")
 826     runtimeLibType = ToolChain::RLT_CompilerRT;
 827   else if (LibName == "libgcc")
 828     runtimeLibType = ToolChain::RLT_Libgcc;
 829   else if (LibName == "platform")
 830     runtimeLibType = GetDefaultRuntimeLibType();
 831   else {
 832     if (A)
 833       getDriver().Diag(diag::err_drv_invalid_rtlib_name)
 834           << A->getAsString(Args);
 835
 836     runtimeLibType = GetDefaultRuntimeLibType();
 837   }
 838
 839   return *runtimeLibType;
 840 }
 841
 842 ToolChain::UnwindLibType ToolChain::GetUnwindLibType(
 843     const ArgList &Args) const {
 844   if (unwindLibType)
 845     return *unwindLibType;
 846
 847   const Arg *A = Args.getLastArg(options::OPT_unwindlib_EQ);
 848   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_UNWINDLIB;
 849
 850   if (LibName == "none")
 851     unwindLibType = ToolChain::UNW_None;
 852   else if (LibName == "platform" || LibName == "") {
 853     ToolChain::RuntimeLibType RtLibType = GetRuntimeLibType(Args);
 854     if (RtLibType == ToolChain::RLT_CompilerRT) {
 855       if (getTriple().isAndroid() || getTriple().isOSAIX())
 856         unwindLibType = ToolChain::UNW_CompilerRT;
 857       else
 858         unwindLibType = ToolChain::UNW_None;
 859     } else if (RtLibType == ToolChain::RLT_Libgcc)
 860       unwindLibType = ToolChain::UNW_Libgcc;
 861   } else if (LibName == "libunwind") {
 862     if (GetRuntimeLibType(Args) == RLT_Libgcc)
 863       getDriver().Diag(diag::err_drv_incompatible_unwindlib);
 864     unwindLibType = ToolChain::UNW_CompilerRT;
 865   } else if (LibName == "libgcc")
 866     unwindLibType = ToolChain::UNW_Libgcc;
 867   else {
 868     if (A)
 869       getDriver().Diag(diag::err_drv_invalid_unwindlib_name)
 870           << A->getAsString(Args);
 871
 872     unwindLibType = GetDefaultUnwindLibType();
 873   }
 874
 875   return *unwindLibType;
 876 }
 877
 878 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
 879   if (cxxStdlibType)
 880     return *cxxStdlibType;
 881
 882   const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
 883   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_CXX_STDLIB;
 884
 885   // Only use "platform" in tests to override CLANG_DEFAULT_CXX_STDLIB!
 886   if (LibName == "libc++")
 887     cxxStdlibType = ToolChain::CST_Libcxx;
 888   else if (LibName == "libstdc++")
 889     cxxStdlibType = ToolChain::CST_Libstdcxx;
 890   else if (LibName == "platform")
 891     cxxStdlibType = GetDefaultCXXStdlibType();
 892   else {
 893     if (A)
 894       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
 895           << A->getAsString(Args);
 896
 897     cxxStdlibType = GetDefaultCXXStdlibType();
 898   }
 899
 900   return *cxxStdlibType;
 901 }
 902
 903 /// Utility function to add a system include directory to CC1 arguments.
 904 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
 905                                             ArgStringList &CC1Args,
 906                                             const Twine &Path) {
 907   CC1Args.push_back("-internal-isystem");
 908   CC1Args.push_back(DriverArgs.MakeArgString(Path));
 909 }
 910
 911 /// Utility function to add a system include directory with extern "C"
 912 /// semantics to CC1 arguments.
 913 ///
 914 /// Note that this should be used rarely, and only for directories that
 915 /// historically and for legacy reasons are treated as having implicit extern
 916 /// "C" semantics. These semantics are *ignored* by and large today, but its
 917 /// important to preserve the preprocessor changes resulting from the
 918 /// classification.
 919 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
 920                                                    ArgStringList &CC1Args,
 921                                                    const Twine &Path) {
 922   CC1Args.push_back("-internal-externc-isystem");
 923   CC1Args.push_back(DriverArgs.MakeArgString(Path));
 924 }
 925
 926 void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs,
 927                                                 ArgStringList &CC1Args,
 928                                                 const Twine &Path) {
 929   if (llvm::sys::fs::exists(Path))
 930     addExternCSystemInclude(DriverArgs, CC1Args, Path);
 931 }
 932
 933 /// Utility function to add a list of system include directories to CC1.
 934 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
 935                                              ArgStringList &CC1Args,
 936                                              ArrayRef<StringRef> Paths) {
 937   for (const auto &Path : Paths) {
 938     CC1Args.push_back("-internal-isystem");
 939     CC1Args.push_back(DriverArgs.MakeArgString(Path));
 940   }
 941 }
 942
 943 /*static*/ std::string ToolChain::concat(StringRef Path, const Twine &A,
 944                                          const Twine &B, const Twine &C,
 945                                          const Twine &D) {
 946   SmallString<128> Result(Path);
 947   llvm::sys::path::append(Result, llvm::sys::path::Style::posix, A, B, C, D);
 948   return std::string(Result);
 949 }
 950
 951 std::string ToolChain::detectLibcxxVersion(StringRef IncludePath) const {
 952   std::error_code EC;
 953   int MaxVersion = 0;
 954   std::string MaxVersionString;
 955   SmallString<128> Path(IncludePath);
 956   llvm::sys::path::append(Path, "c++");
 957   for (llvm::vfs::directory_iterator LI = getVFS().dir_begin(Path, EC), LE;
 958        !EC && LI != LE; LI = LI.increment(EC)) {
 959     StringRef VersionText = llvm::sys::path::filename(LI->path());
 960     int Version;
 961     if (VersionText[0] == 'v' &&
 962         !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
 963       if (Version > MaxVersion) {
 964         MaxVersion = Version;
 965         MaxVersionString = std::string(VersionText);
 966       }
 967     }
 968   }
 969   if (!MaxVersion)
 970     return "";
 971   return MaxVersionString;
 972 }
 973
 974 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
 975                                              ArgStringList &CC1Args) const {
 976   // Header search paths should be handled by each of the subclasses.
 977   // Historically, they have not been, and instead have been handled inside of
 978   // the CC1-layer frontend. As the logic is hoisted out, this generic function
 979   // will slowly stop being called.
 980   //
 981   // While it is being called, replicate a bit of a hack to propagate the
 982   // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
 983   // header search paths with it. Once all systems are overriding this
 984   // function, the CC1 flag and this line can be removed.
 985   DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
 986 }
 987
 988 void ToolChain::AddClangCXXStdlibIsystemArgs(
 989     const llvm::opt::ArgList &DriverArgs,
 990     llvm::opt::ArgStringList &CC1Args) const {
 991   DriverArgs.ClaimAllArgs(options::OPT_stdlibxx_isystem);
 992   if (!DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdincxx,
 993                          options::OPT_nostdlibinc))
 994     for (const auto &P :
 995          DriverArgs.getAllArgValues(options::OPT_stdlibxx_isystem))
 996       addSystemInclude(DriverArgs, CC1Args, P);
 997 }
 998
 999 bool ToolChain::ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const {
1000   return getDriver().CCCIsCXX() &&
1001          !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
1002                       options::OPT_nostdlibxx);
1003 }
1004
1005 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
1006                                     ArgStringList &CmdArgs) const {
1007   assert(!Args.hasArg(options::OPT_nostdlibxx) &&
1008          "should not have called this");
1009   CXXStdlibType Type = GetCXXStdlibType(Args);
1010
1011   switch (Type) {
1012   case ToolChain::CST_Libcxx:
1013     CmdArgs.push_back("-lc++");
1014     if (Args.hasArg(options::OPT_fexperimental_library))
1015       CmdArgs.push_back("-lc++experimental");
1016     break;
1017
1018   case ToolChain::CST_Libstdcxx:
1019     CmdArgs.push_back("-lstdc++");
1020     break;
1021   }
1022 }
1023
1024 void ToolChain::AddFilePathLibArgs(const ArgList &Args,
1025                                    ArgStringList &CmdArgs) const {
1026   for (const auto &LibPath : getFilePaths())
1027     if(LibPath.length() > 0)
1028       CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
1029 }
1030
1031 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
1032                                  ArgStringList &CmdArgs) const {
1033   CmdArgs.push_back("-lcc_kext");
1034 }
1035
1036 bool ToolChain::isFastMathRuntimeAvailable(const ArgList &Args,
1037                                            std::string &Path) const {
1038   // Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed
1039   // (to keep the linker options consistent with gcc and clang itself).
1040   if (!isOptimizationLevelFast(Args)) {
1041     // Check if -ffast-math or -funsafe-math.
1042     Arg *A =
1043       Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math,
1044                       options::OPT_funsafe_math_optimizations,
1045                       options::OPT_fno_unsafe_math_optimizations);
1046
1047     if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
1048         A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
1049       return false;
1050   }
1051   // If crtfastmath.o exists add it to the arguments.
1052   Path = GetFilePath("crtfastmath.o");
1053   return (Path != "crtfastmath.o"); // Not found.
1054 }
1055
1056 bool ToolChain::addFastMathRuntimeIfAvailable(const ArgList &Args,
1057                                               ArgStringList &CmdArgs) const {
1058   std::string Path;
1059   if (isFastMathRuntimeAvailable(Args, Path)) {
1060     CmdArgs.push_back(Args.MakeArgString(Path));
1061     return true;
1062   }
1063
1064   return false;
1065 }
1066
1067 SanitizerMask ToolChain::getSupportedSanitizers() const {
1068   // Return sanitizers which don't require runtime support and are not
1069   // platform dependent.
1070
1071   SanitizerMask Res =
1072       (SanitizerKind::Undefined & ~SanitizerKind::Vptr &
1073        ~SanitizerKind::Function) |
1074       (SanitizerKind::CFI & ~SanitizerKind::CFIICall) |
1075       SanitizerKind::CFICastStrict | SanitizerKind::FloatDivideByZero |
1076       SanitizerKind::UnsignedIntegerOverflow |
1077       SanitizerKind::UnsignedShiftBase | SanitizerKind::ImplicitConversion |
1078       SanitizerKind::Nullability | SanitizerKind::LocalBounds;
1079   if (getTriple().getArch() == llvm::Triple::x86 ||
1080       getTriple().getArch() == llvm::Triple::x86_64 ||
1081       getTriple().getArch() == llvm::Triple::arm || getTriple().isWasm() ||
1082       getTriple().isAArch64() || getTriple().isRISCV())
1083     Res |= SanitizerKind::CFIICall;
1084   if (getTriple().getArch() == llvm::Triple::x86_64 ||
1085       getTriple().isAArch64(64))
1086     Res |= SanitizerKind::KCFI;
1087   if (getTriple().getArch() == llvm::Triple::x86_64 ||
1088       getTriple().isAArch64(64) || getTriple().isRISCV())
1089     Res |= SanitizerKind::ShadowCallStack;
1090   if (getTriple().isAArch64(64))
1091     Res |= SanitizerKind::MemTag;
1092   return Res;
1093 }
1094
1095 void ToolChain::AddCudaIncludeArgs(const ArgList &DriverArgs,
1096                                    ArgStringList &CC1Args) const {}
1097
1098 void ToolChain::AddHIPIncludeArgs(const ArgList &DriverArgs,
1099                                   ArgStringList &CC1Args) const {}
1100
1101 llvm::SmallVector<ToolChain::BitCodeLibraryInfo, 12>
1102 ToolChain::getDeviceLibs(const ArgList &DriverArgs) const {
1103   return {};
1104 }
1105
1106 void ToolChain::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
1107                                     ArgStringList &CC1Args) const {}
1108
1109 static VersionTuple separateMSVCFullVersion(unsigned Version) {
1110   if (Version < 100)
1111     return VersionTuple(Version);
1112
1113   if (Version < 10000)
1114     return VersionTuple(Version / 100, Version % 100);
1115
1116   unsigned Build = 0, Factor = 1;
1117   for (; Version > 10000; Version = Version / 10, Factor = Factor * 10)
1118     Build = Build + (Version % 10) * Factor;
1119   return VersionTuple(Version / 100, Version % 100, Build);
1120 }
1121
1122 VersionTuple
1123 ToolChain::computeMSVCVersion(const Driver *D,
1124                               const llvm::opt::ArgList &Args) const {
1125   const Arg *MSCVersion = Args.getLastArg(options::OPT_fmsc_version);
1126   const Arg *MSCompatibilityVersion =
1127       Args.getLastArg(options::OPT_fms_compatibility_version);
1128
1129   if (MSCVersion && MSCompatibilityVersion) {
1130     if (D)
1131       D->Diag(diag::err_drv_argument_not_allowed_with)
1132           << MSCVersion->getAsString(Args)
1133           << MSCompatibilityVersion->getAsString(Args);
1134     return VersionTuple();
1135   }
1136
1137   if (MSCompatibilityVersion) {
1138     VersionTuple MSVT;
1139     if (MSVT.tryParse(MSCompatibilityVersion->getValue())) {
1140       if (D)
1141         D->Diag(diag::err_drv_invalid_value)
1142             << MSCompatibilityVersion->getAsString(Args)
1143             << MSCompatibilityVersion->getValue();
1144     } else {
1145       return MSVT;
1146     }
1147   }
1148
1149   if (MSCVersion) {
1150     unsigned Version = 0;
1151     if (StringRef(MSCVersion->getValue()).getAsInteger(10, Version)) {
1152       if (D)
1153         D->Diag(diag::err_drv_invalid_value)
1154             << MSCVersion->getAsString(Args) << MSCVersion->getValue();
1155     } else {
1156       return separateMSVCFullVersion(Version);
1157     }
1158   }
1159
1160   return VersionTuple();
1161 }
1162
1163 llvm::opt::DerivedArgList *ToolChain::TranslateOpenMPTargetArgs(
1164     const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost,
1165     SmallVectorImpl<llvm::opt::Arg *> &AllocatedArgs) const {
1166   DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
1167   const OptTable &Opts = getDriver().getOpts();
1168   bool Modified = false;
1169
1170   // Handle -Xopenmp-target flags
1171   for (auto *A : Args) {
1172     // Exclude flags which may only apply to the host toolchain.
1173     // Do not exclude flags when the host triple (AuxTriple)
1174     // matches the current toolchain triple. If it is not present
1175     // at all, target and host share a toolchain.
1176     if (A->getOption().matches(options::OPT_m_Group)) {
1177       if (SameTripleAsHost)
1178         DAL->append(A);
1179       else
1180         Modified = true;
1181       continue;
1182     }
1183
1184     unsigned Index;
1185     unsigned Prev;
1186     bool XOpenMPTargetNoTriple =
1187         A->getOption().matches(options::OPT_Xopenmp_target);
1188
1189     if (A->getOption().matches(options::OPT_Xopenmp_target_EQ)) {
1190       llvm::Triple TT(getOpenMPTriple(A->getValue(0)));
1191
1192       // Passing device args: -Xopenmp-target=<triple> -opt=val.
1193       if (TT.getTriple() == getTripleString())
1194         Index = Args.getBaseArgs().MakeIndex(A->getValue(1));
1195       else
1196         continue;
1197     } else if (XOpenMPTargetNoTriple) {
1198       // Passing device args: -Xopenmp-target -opt=val.
1199       Index = Args.getBaseArgs().MakeIndex(A->getValue(0));
1200     } else {
1201       DAL->append(A);
1202       continue;
1203     }
1204
1205     // Parse the argument to -Xopenmp-target.
1206     Prev = Index;
1207     std::unique_ptr<Arg> XOpenMPTargetArg(Opts.ParseOneArg(Args, Index));
1208     if (!XOpenMPTargetArg || Index > Prev + 1) {
1209       getDriver().Diag(diag::err_drv_invalid_Xopenmp_target_with_args)
1210           << A->getAsString(Args);
1211       continue;
1212     }
1213     if (XOpenMPTargetNoTriple && XOpenMPTargetArg &&
1214         Args.getAllArgValues(options::OPT_fopenmp_targets_EQ).size() != 1) {
1215       getDriver().Diag(diag::err_drv_Xopenmp_target_missing_triple);
1216       continue;
1217     }
1218     XOpenMPTargetArg->setBaseArg(A);
1219     A = XOpenMPTargetArg.release();
1220     AllocatedArgs.push_back(A);
1221     DAL->append(A);
1222     Modified = true;
1223   }
1224
1225   if (Modified)
1226     return DAL;
1227
1228   delete DAL;
1229   return nullptr;
1230 }
1231
1232 // TODO: Currently argument values separated by space e.g.
1233 // -Xclang -mframe-pointer=no cannot be passed by -Xarch_. This should be
1234 // fixed.
1235 void ToolChain::TranslateXarchArgs(
1236     const llvm::opt::DerivedArgList &Args, llvm::opt::Arg *&A,
1237     llvm::opt::DerivedArgList *DAL,
1238     SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const {
1239   const OptTable &Opts = getDriver().getOpts();
1240   unsigned ValuePos = 1;
1241   if (A->getOption().matches(options::OPT_Xarch_device) ||
1242       A->getOption().matches(options::OPT_Xarch_host))
1243     ValuePos = 0;
1244
1245   unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(ValuePos));
1246   unsigned Prev = Index;
1247   std::unique_ptr<llvm::opt::Arg> XarchArg(Opts.ParseOneArg(Args, Index));
1248
1249   // If the argument parsing failed or more than one argument was
1250   // consumed, the -Xarch_ argument's parameter tried to consume
1251   // extra arguments. Emit an error and ignore.
1252   //
1253   // We also want to disallow any options which would alter the
1254   // driver behavior; that isn't going to work in our model. We
1255   // use options::NoXarchOption to control this.
1256   if (!XarchArg || Index > Prev + 1) {
1257     getDriver().Diag(diag::err_drv_invalid_Xarch_argument_with_args)
1258         << A->getAsString(Args);
1259     return;
1260   } else if (XarchArg->getOption().hasFlag(options::NoXarchOption)) {
1261     auto &Diags = getDriver().getDiags();
1262     unsigned DiagID =
1263         Diags.getCustomDiagID(DiagnosticsEngine::Error,
1264                               "invalid Xarch argument: '%0', not all driver "
1265                               "options can be forwared via Xarch argument");
1266     Diags.Report(DiagID) << A->getAsString(Args);
1267     return;
1268   }
1269   XarchArg->setBaseArg(A);
1270   A = XarchArg.release();
1271   if (!AllocatedArgs)
1272     DAL->AddSynthesizedArg(A);
1273   else
1274     AllocatedArgs->push_back(A);
1275 }
1276
1277 llvm::opt::DerivedArgList *ToolChain::TranslateXarchArgs(
1278     const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
1279     Action::OffloadKind OFK,
1280     SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const {
1281   DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
1282   bool Modified = false;
1283
1284   bool IsGPU = OFK == Action::OFK_Cuda || OFK == Action::OFK_HIP;
1285   for (Arg *A : Args) {
1286     bool NeedTrans = false;
1287     bool Skip = false;
1288     if (A->getOption().matches(options::OPT_Xarch_device)) {
1289       NeedTrans = IsGPU;
1290       Skip = !IsGPU;
1291     } else if (A->getOption().matches(options::OPT_Xarch_host)) {
1292       NeedTrans = !IsGPU;
1293       Skip = IsGPU;
1294     } else if (A->getOption().matches(options::OPT_Xarch__) && IsGPU) {
1295       // Do not translate -Xarch_ options for non CUDA/HIP toolchain since
1296       // they may need special translation.
1297       // Skip this argument unless the architecture matches BoundArch
1298       if (BoundArch.empty() || A->getValue(0) != BoundArch)
1299         Skip = true;
1300       else
1301         NeedTrans = true;
1302     }
1303     if (NeedTrans || Skip)
1304       Modified = true;
1305     if (NeedTrans)
1306       TranslateXarchArgs(Args, A, DAL, AllocatedArgs);
1307     if (!Skip)
1308       DAL->append(A);
1309   }
1310
1311   if (Modified)
1312     return DAL;
1313
1314   delete DAL;
1315   return nullptr;
1316 }