xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChain.cpp (revision 350b7c3570aa6c87c537e54f706f1866f93a4142) 
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/FileUtilities.h"
40 #include "llvm/Support/Path.h"
41 #include "llvm/Support/TargetParser.h"
42 #include "llvm/Support/VersionTuple.h"
43 #include "llvm/Support/VirtualFileSystem.h"
44 #include <cassert>
45 #include <cstddef>
46 #include <cstring>
47 #include <string>
48 
49 using namespace clang;
50 using namespace driver;
51 using namespace tools;
52 using namespace llvm;
53 using namespace llvm::opt;
54 
55 static llvm::opt::Arg *GetRTTIArgument(const ArgList &Args) {
56   return Args.getLastArg(options::OPT_mkernel, options::OPT_fapple_kext,
57                          options::OPT_fno_rtti, options::OPT_frtti);
58 }
59 
60 static ToolChain::RTTIMode CalculateRTTIMode(const ArgList &Args,
61                                              const llvm::Triple &Triple,
62                                              const Arg *CachedRTTIArg) {
63   // Explicit rtti/no-rtti args
64   if (CachedRTTIArg) {
65     if (CachedRTTIArg->getOption().matches(options::OPT_frtti))
66       return ToolChain::RM_Enabled;
67     else
68       return ToolChain::RM_Disabled;
69   }
70 
71   // -frtti is default, except for the PS4/PS5 and DriverKit.
72   bool NoRTTI = Triple.isPS() || Triple.isDriverKit();
73   return NoRTTI ? ToolChain::RM_Disabled : ToolChain::RM_Enabled;
74 }
75 
76 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
77                      const ArgList &Args)
78     : D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)),
79       CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) {
80   auto addIfExists = [this](path_list &List, const std::string &Path) {
81     if (getVFS().exists(Path))
82       List.push_back(Path);
83   };
84 
85   for (const auto &Path : getRuntimePaths())
86     addIfExists(getLibraryPaths(), Path);
87   for (const auto &Path : getStdlibPaths())
88     addIfExists(getFilePaths(), Path);
89   addIfExists(getFilePaths(), getArchSpecificLibPath());
90 }
91 
92 llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>>
93 ToolChain::executeToolChainProgram(StringRef Executable) const {
94   llvm::SmallString<64> OutputFile;
95   llvm::sys::fs::createTemporaryFile("toolchain-program", "txt", OutputFile);
96   llvm::FileRemover OutputRemover(OutputFile.c_str());
97   std::optional<llvm::StringRef> Redirects[] = {
98       {""},
99       OutputFile.str(),
100       {""},
101   };
102 
103   std::string ErrorMessage;
104   if (llvm::sys::ExecuteAndWait(Executable, {}, {}, Redirects,
105                                 /* SecondsToWait */ 0,
106                                 /*MemoryLimit*/ 0, &ErrorMessage))
107     return llvm::createStringError(std::error_code(),
108                                    Executable + ": " + ErrorMessage);
109 
110   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> OutputBuf =
111       llvm::MemoryBuffer::getFile(OutputFile.c_str());
112   if (!OutputBuf)
113     return llvm::createStringError(OutputBuf.getError(),
114                                    "Failed to read stdout of " + Executable +
115                                        ": " + OutputBuf.getError().message());
116   return std::move(*OutputBuf);
117 }
118 
119 void ToolChain::setTripleEnvironment(llvm::Triple::EnvironmentType Env) {
120   Triple.setEnvironment(Env);
121   if (EffectiveTriple != llvm::Triple())
122     EffectiveTriple.setEnvironment(Env);
123 }
124 
125 ToolChain::~ToolChain() = default;
126 
127 llvm::vfs::FileSystem &ToolChain::getVFS() const {
128   return getDriver().getVFS();
129 }
130 
131 bool ToolChain::useIntegratedAs() const {
132   return Args.hasFlag(options::OPT_fintegrated_as,
133                       options::OPT_fno_integrated_as,
134                       IsIntegratedAssemblerDefault());
135 }
136 
137 bool ToolChain::useIntegratedBackend() const {
138   assert(
139       ((IsIntegratedBackendDefault() && IsIntegratedBackendSupported()) ||
140        (!IsIntegratedBackendDefault() || IsNonIntegratedBackendSupported())) &&
141       "(Non-)integrated backend set incorrectly!");
142 
143   bool IBackend = Args.hasFlag(options::OPT_fintegrated_objemitter,
144                                options::OPT_fno_integrated_objemitter,
145                                IsIntegratedBackendDefault());
146 
147   // Diagnose when integrated-objemitter options are not supported by this
148   // toolchain.
149   unsigned DiagID;
150   if ((IBackend && !IsIntegratedBackendSupported()) ||
151       (!IBackend && !IsNonIntegratedBackendSupported()))
152     DiagID = clang::diag::err_drv_unsupported_opt_for_target;
153   else
154     DiagID = clang::diag::warn_drv_unsupported_opt_for_target;
155   Arg *A = Args.getLastArg(options::OPT_fno_integrated_objemitter);
156   if (A && !IsNonIntegratedBackendSupported())
157     D.Diag(DiagID) << A->getAsString(Args) << Triple.getTriple();
158   A = Args.getLastArg(options::OPT_fintegrated_objemitter);
159   if (A && !IsIntegratedBackendSupported())
160     D.Diag(DiagID) << A->getAsString(Args) << Triple.getTriple();
161 
162   return IBackend;
163 }
164 
165 bool ToolChain::useRelaxRelocations() const {
166   return ENABLE_X86_RELAX_RELOCATIONS;
167 }
168 
169 bool ToolChain::defaultToIEEELongDouble() const {
170   return PPC_LINUX_DEFAULT_IEEELONGDOUBLE && getTriple().isOSLinux();
171 }
172 
173 SanitizerArgs
174 ToolChain::getSanitizerArgs(const llvm::opt::ArgList &JobArgs) const {
175   SanitizerArgs SanArgs(*this, JobArgs, !SanitizerArgsChecked);
176   SanitizerArgsChecked = true;
177   return SanArgs;
178 }
179 
180 const XRayArgs& ToolChain::getXRayArgs() const {
181   if (!XRayArguments)
182     XRayArguments.reset(new XRayArgs(*this, Args));
183   return *XRayArguments;
184 }
185 
186 namespace {
187 
188 struct DriverSuffix {
189   const char *Suffix;
190   const char *ModeFlag;
191 };
192 
193 } // namespace
194 
195 static const DriverSuffix *FindDriverSuffix(StringRef ProgName, size_t &Pos) {
196   // A list of known driver suffixes. Suffixes are compared against the
197   // program name in order. If there is a match, the frontend type is updated as
198   // necessary by applying the ModeFlag.
199   static const DriverSuffix DriverSuffixes[] = {
200       {"clang", nullptr},
201       {"clang++", "--driver-mode=g++"},
202       {"clang-c++", "--driver-mode=g++"},
203       {"clang-cc", nullptr},
204       {"clang-cpp", "--driver-mode=cpp"},
205       {"clang-g++", "--driver-mode=g++"},
206       {"clang-gcc", nullptr},
207       {"clang-cl", "--driver-mode=cl"},
208       {"cc", nullptr},
209       {"cpp", "--driver-mode=cpp"},
210       {"cl", "--driver-mode=cl"},
211       {"++", "--driver-mode=g++"},
212       {"flang", "--driver-mode=flang"},
213       {"clang-dxc", "--driver-mode=dxc"},
214   };
215 
216   for (const auto &DS : DriverSuffixes) {
217     StringRef Suffix(DS.Suffix);
218     if (ProgName.endswith(Suffix)) {
219       Pos = ProgName.size() - Suffix.size();
220       return &DS;
221     }
222   }
223   return nullptr;
224 }
225 
226 /// Normalize the program name from argv[0] by stripping the file extension if
227 /// present and lower-casing the string on Windows.
228 static std::string normalizeProgramName(llvm::StringRef Argv0) {
229   std::string ProgName = std::string(llvm::sys::path::filename(Argv0));
230   if (is_style_windows(llvm::sys::path::Style::native)) {
231     // Transform to lowercase for case insensitive file systems.
232     std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(),
233                    ::tolower);
234   }
235   return ProgName;
236 }
237 
238 static const DriverSuffix *parseDriverSuffix(StringRef ProgName, size_t &Pos) {
239   // Try to infer frontend type and default target from the program name by
240   // comparing it against DriverSuffixes in order.
241 
242   // If there is a match, the function tries to identify a target as prefix.
243   // E.g. "x86_64-linux-clang" as interpreted as suffix "clang" with target
244   // prefix "x86_64-linux". If such a target prefix is found, it may be
245   // added via -target as implicit first argument.
246   const DriverSuffix *DS = FindDriverSuffix(ProgName, Pos);
247 
248   if (!DS && ProgName.endswith(".exe")) {
249     // Try again after stripping the executable suffix:
250     // clang++.exe -> clang++
251     ProgName = ProgName.drop_back(StringRef(".exe").size());
252     DS = FindDriverSuffix(ProgName, Pos);
253   }
254 
255   if (!DS) {
256     // Try again after stripping any trailing version number:
257     // clang++3.5 -> clang++
258     ProgName = ProgName.rtrim("0123456789.");
259     DS = FindDriverSuffix(ProgName, Pos);
260   }
261 
262   if (!DS) {
263     // Try again after stripping trailing -component.
264     // clang++-tot -> clang++
265     ProgName = ProgName.slice(0, ProgName.rfind('-'));
266     DS = FindDriverSuffix(ProgName, Pos);
267   }
268   return DS;
269 }
270 
271 ParsedClangName
272 ToolChain::getTargetAndModeFromProgramName(StringRef PN) {
273   std::string ProgName = normalizeProgramName(PN);
274   size_t SuffixPos;
275   const DriverSuffix *DS = parseDriverSuffix(ProgName, SuffixPos);
276   if (!DS)
277     return {};
278   size_t SuffixEnd = SuffixPos + strlen(DS->Suffix);
279 
280   size_t LastComponent = ProgName.rfind('-', SuffixPos);
281   if (LastComponent == std::string::npos)
282     return ParsedClangName(ProgName.substr(0, SuffixEnd), DS->ModeFlag);
283   std::string ModeSuffix = ProgName.substr(LastComponent + 1,
284                                            SuffixEnd - LastComponent - 1);
285 
286   // Infer target from the prefix.
287   StringRef Prefix(ProgName);
288   Prefix = Prefix.slice(0, LastComponent);
289   std::string IgnoredError;
290   bool IsRegistered =
291       llvm::TargetRegistry::lookupTarget(std::string(Prefix), IgnoredError);
292   return ParsedClangName{std::string(Prefix), ModeSuffix, DS->ModeFlag,
293                          IsRegistered};
294 }
295 
296 StringRef ToolChain::getDefaultUniversalArchName() const {
297   // In universal driver terms, the arch name accepted by -arch isn't exactly
298   // the same as the ones that appear in the triple. Roughly speaking, this is
299   // an inverse of the darwin::getArchTypeForDarwinArchName() function.
300   switch (Triple.getArch()) {
301   case llvm::Triple::aarch64: {
302     if (getTriple().isArm64e())
303       return "arm64e";
304     return "arm64";
305   }
306   case llvm::Triple::aarch64_32:
307     return "arm64_32";
308   case llvm::Triple::ppc:
309     return "ppc";
310   case llvm::Triple::ppcle:
311     return "ppcle";
312   case llvm::Triple::ppc64:
313     return "ppc64";
314   case llvm::Triple::ppc64le:
315     return "ppc64le";
316   default:
317     return Triple.getArchName();
318   }
319 }
320 
321 std::string ToolChain::getInputFilename(const InputInfo &Input) const {
322   return Input.getFilename();
323 }
324 
325 ToolChain::UnwindTableLevel
326 ToolChain::getDefaultUnwindTableLevel(const ArgList &Args) const {
327   return UnwindTableLevel::None;
328 }
329 
330 Tool *ToolChain::getClang() const {
331   if (!Clang)
332     Clang.reset(new tools::Clang(*this, useIntegratedBackend()));
333   return Clang.get();
334 }
335 
336 Tool *ToolChain::getFlang() const {
337   if (!Flang)
338     Flang.reset(new tools::Flang(*this));
339   return Flang.get();
340 }
341 
342 Tool *ToolChain::buildAssembler() const {
343   return new tools::ClangAs(*this);
344 }
345 
346 Tool *ToolChain::buildLinker() const {
347   llvm_unreachable("Linking is not supported by this toolchain");
348 }
349 
350 Tool *ToolChain::buildStaticLibTool() const {
351   llvm_unreachable("Creating static lib is not supported by this toolchain");
352 }
353 
354 Tool *ToolChain::getAssemble() const {
355   if (!Assemble)
356     Assemble.reset(buildAssembler());
357   return Assemble.get();
358 }
359 
360 Tool *ToolChain::getClangAs() const {
361   if (!Assemble)
362     Assemble.reset(new tools::ClangAs(*this));
363   return Assemble.get();
364 }
365 
366 Tool *ToolChain::getLink() const {
367   if (!Link)
368     Link.reset(buildLinker());
369   return Link.get();
370 }
371 
372 Tool *ToolChain::getStaticLibTool() const {
373   if (!StaticLibTool)
374     StaticLibTool.reset(buildStaticLibTool());
375   return StaticLibTool.get();
376 }
377 
378 Tool *ToolChain::getIfsMerge() const {
379   if (!IfsMerge)
380     IfsMerge.reset(new tools::ifstool::Merger(*this));
381   return IfsMerge.get();
382 }
383 
384 Tool *ToolChain::getOffloadBundler() const {
385   if (!OffloadBundler)
386     OffloadBundler.reset(new tools::OffloadBundler(*this));
387   return OffloadBundler.get();
388 }
389 
390 Tool *ToolChain::getOffloadPackager() const {
391   if (!OffloadPackager)
392     OffloadPackager.reset(new tools::OffloadPackager(*this));
393   return OffloadPackager.get();
394 }
395 
396 Tool *ToolChain::getLinkerWrapper() const {
397   if (!LinkerWrapper)
398     LinkerWrapper.reset(new tools::LinkerWrapper(*this, getLink()));
399   return LinkerWrapper.get();
400 }
401 
402 Tool *ToolChain::getTool(Action::ActionClass AC) const {
403   switch (AC) {
404   case Action::AssembleJobClass:
405     return getAssemble();
406 
407   case Action::IfsMergeJobClass:
408     return getIfsMerge();
409 
410   case Action::LinkJobClass:
411     return getLink();
412 
413   case Action::StaticLibJobClass:
414     return getStaticLibTool();
415 
416   case Action::InputClass:
417   case Action::BindArchClass:
418   case Action::OffloadClass:
419   case Action::LipoJobClass:
420   case Action::DsymutilJobClass:
421   case Action::VerifyDebugInfoJobClass:
422     llvm_unreachable("Invalid tool kind.");
423 
424   case Action::CompileJobClass:
425   case Action::PrecompileJobClass:
426   case Action::PreprocessJobClass:
427   case Action::ExtractAPIJobClass:
428   case Action::AnalyzeJobClass:
429   case Action::MigrateJobClass:
430   case Action::VerifyPCHJobClass:
431   case Action::BackendJobClass:
432     return getClang();
433 
434   case Action::OffloadBundlingJobClass:
435   case Action::OffloadUnbundlingJobClass:
436     return getOffloadBundler();
437 
438   case Action::OffloadPackagerJobClass:
439     return getOffloadPackager();
440   case Action::LinkerWrapperJobClass:
441     return getLinkerWrapper();
442   }
443 
444   llvm_unreachable("Invalid tool kind.");
445 }
446 
447 static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
448                                              const ArgList &Args) {
449   const llvm::Triple &Triple = TC.getTriple();
450   bool IsWindows = Triple.isOSWindows();
451 
452   if (TC.isBareMetal())
453     return Triple.getArchName();
454 
455   if (TC.getArch() == llvm::Triple::arm || TC.getArch() == llvm::Triple::armeb)
456     return (arm::getARMFloatABI(TC, Args) == arm::FloatABI::Hard && !IsWindows)
457                ? "armhf"
458                : "arm";
459 
460   // For historic reasons, Android library is using i686 instead of i386.
461   if (TC.getArch() == llvm::Triple::x86 && Triple.isAndroid())
462     return "i686";
463 
464   if (TC.getArch() == llvm::Triple::x86_64 && Triple.isX32())
465     return "x32";
466 
467   return llvm::Triple::getArchTypeName(TC.getArch());
468 }
469 
470 StringRef ToolChain::getOSLibName() const {
471   if (Triple.isOSDarwin())
472     return "darwin";
473 
474   switch (Triple.getOS()) {
475   case llvm::Triple::FreeBSD:
476     return "freebsd";
477   case llvm::Triple::NetBSD:
478     return "netbsd";
479   case llvm::Triple::OpenBSD:
480     return "openbsd";
481   case llvm::Triple::Solaris:
482     return "sunos";
483   case llvm::Triple::AIX:
484     return "aix";
485   default:
486     return getOS();
487   }
488 }
489 
490 std::string ToolChain::getCompilerRTPath() const {
491   SmallString<128> Path(getDriver().ResourceDir);
492   if (isBareMetal()) {
493     llvm::sys::path::append(Path, "lib", getOSLibName());
494     Path += SelectedMultilib.gccSuffix();
495   } else if (Triple.isOSUnknown()) {
496     llvm::sys::path::append(Path, "lib");
497   } else {
498     llvm::sys::path::append(Path, "lib", getOSLibName());
499   }
500   return std::string(Path.str());
501 }
502 
503 std::string ToolChain::getCompilerRTBasename(const ArgList &Args,
504                                              StringRef Component,
505                                              FileType Type) const {
506   std::string CRTAbsolutePath = getCompilerRT(Args, Component, Type);
507   return llvm::sys::path::filename(CRTAbsolutePath).str();
508 }
509 
510 std::string ToolChain::buildCompilerRTBasename(const llvm::opt::ArgList &Args,
511                                                StringRef Component,
512                                                FileType Type,
513                                                bool AddArch) const {
514   const llvm::Triple &TT = getTriple();
515   bool IsITANMSVCWindows =
516       TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment();
517 
518   const char *Prefix =
519       IsITANMSVCWindows || Type == ToolChain::FT_Object ? "" : "lib";
520   const char *Suffix;
521   switch (Type) {
522   case ToolChain::FT_Object:
523     Suffix = IsITANMSVCWindows ? ".obj" : ".o";
524     break;
525   case ToolChain::FT_Static:
526     Suffix = IsITANMSVCWindows ? ".lib" : ".a";
527     break;
528   case ToolChain::FT_Shared:
529     Suffix = TT.isOSWindows()
530                  ? (TT.isWindowsGNUEnvironment() ? ".dll.a" : ".lib")
531                  : ".so";
532     break;
533   }
534 
535   std::string ArchAndEnv;
536   if (AddArch) {
537     StringRef Arch = getArchNameForCompilerRTLib(*this, Args);
538     const char *Env = TT.isAndroid() ? "-android" : "";
539     ArchAndEnv = ("-" + Arch + Env).str();
540   }
541   return (Prefix + Twine("clang_rt.") + Component + ArchAndEnv + Suffix).str();
542 }
543 
544 std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef Component,
545                                      FileType Type) const {
546   // Check for runtime files in the new layout without the architecture first.
547   std::string CRTBasename =
548       buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/false);
549   for (const auto &LibPath : getLibraryPaths()) {
550     SmallString<128> P(LibPath);
551     llvm::sys::path::append(P, CRTBasename);
552     if (getVFS().exists(P))
553       return std::string(P.str());
554   }
555 
556   // Fall back to the old expected compiler-rt name if the new one does not
557   // exist.
558   CRTBasename =
559       buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/true);
560   SmallString<128> Path(getCompilerRTPath());
561   llvm::sys::path::append(Path, CRTBasename);
562   return std::string(Path.str());
563 }
564 
565 const char *ToolChain::getCompilerRTArgString(const llvm::opt::ArgList &Args,
566                                               StringRef Component,
567                                               FileType Type) const {
568   return Args.MakeArgString(getCompilerRT(Args, Component, Type));
569 }
570 
571 ToolChain::path_list ToolChain::getRuntimePaths() const {
572   path_list Paths;
573   auto addPathForTriple = [this, &Paths](const llvm::Triple &Triple) {
574     SmallString<128> P(D.ResourceDir);
575     llvm::sys::path::append(P, "lib", Triple.str());
576     Paths.push_back(std::string(P.str()));
577   };
578 
579   addPathForTriple(getTriple());
580 
581   // Android targets may include an API level at the end. We still want to fall
582   // back on a path without the API level.
583   if (getTriple().isAndroid() &&
584       getTriple().getEnvironmentName() != "android") {
585     llvm::Triple TripleWithoutLevel = getTriple();
586     TripleWithoutLevel.setEnvironmentName("android");
587     addPathForTriple(TripleWithoutLevel);
588   }
589 
590   return Paths;
591 }
592 
593 ToolChain::path_list ToolChain::getStdlibPaths() const {
594   path_list Paths;
595   SmallString<128> P(D.Dir);
596   llvm::sys::path::append(P, "..", "lib", getTripleString());
597   Paths.push_back(std::string(P.str()));
598 
599   return Paths;
600 }
601 
602 std::string ToolChain::getArchSpecificLibPath() const {
603   SmallString<128> Path(getDriver().ResourceDir);
604   llvm::sys::path::append(Path, "lib", getOSLibName(),
605                           llvm::Triple::getArchTypeName(getArch()));
606   return std::string(Path.str());
607 }
608 
609 bool ToolChain::needsProfileRT(const ArgList &Args) {
610   if (Args.hasArg(options::OPT_noprofilelib))
611     return false;
612 
613   return Args.hasArg(options::OPT_fprofile_generate) ||
614          Args.hasArg(options::OPT_fprofile_generate_EQ) ||
615          Args.hasArg(options::OPT_fcs_profile_generate) ||
616          Args.hasArg(options::OPT_fcs_profile_generate_EQ) ||
617          Args.hasArg(options::OPT_fprofile_instr_generate) ||
618          Args.hasArg(options::OPT_fprofile_instr_generate_EQ) ||
619          Args.hasArg(options::OPT_fcreate_profile) ||
620          Args.hasArg(options::OPT_forder_file_instrumentation);
621 }
622 
623 bool ToolChain::needsGCovInstrumentation(const llvm::opt::ArgList &Args) {
624   return Args.hasArg(options::OPT_coverage) ||
625          Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
626                       false);
627 }
628 
629 Tool *ToolChain::SelectTool(const JobAction &JA) const {
630   if (D.IsFlangMode() && getDriver().ShouldUseFlangCompiler(JA)) return getFlang();
631   if (getDriver().ShouldUseClangCompiler(JA)) return getClang();
632   Action::ActionClass AC = JA.getKind();
633   if (AC == Action::AssembleJobClass && useIntegratedAs())
634     return getClangAs();
635   return getTool(AC);
636 }
637 
638 std::string ToolChain::GetFilePath(const char *Name) const {
639   return D.GetFilePath(Name, *this);
640 }
641 
642 std::string ToolChain::GetProgramPath(const char *Name) const {
643   return D.GetProgramPath(Name, *this);
644 }
645 
646 std::string ToolChain::GetLinkerPath(bool *LinkerIsLLD) const {
647   if (LinkerIsLLD)
648     *LinkerIsLLD = false;
649 
650   // Get -fuse-ld= first to prevent -Wunused-command-line-argument. -fuse-ld= is
651   // considered as the linker flavor, e.g. "bfd", "gold", or "lld".
652   const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ);
653   StringRef UseLinker = A ? A->getValue() : CLANG_DEFAULT_LINKER;
654 
655   // --ld-path= takes precedence over -fuse-ld= and specifies the executable
656   // name. -B, COMPILER_PATH and PATH and consulted if the value does not
657   // contain a path component separator.
658   // -fuse-ld=lld can be used with --ld-path= to inform clang that the binary
659   // that --ld-path= points to is lld.
660   if (const Arg *A = Args.getLastArg(options::OPT_ld_path_EQ)) {
661     std::string Path(A->getValue());
662     if (!Path.empty()) {
663       if (llvm::sys::path::parent_path(Path).empty())
664         Path = GetProgramPath(A->getValue());
665       if (llvm::sys::fs::can_execute(Path)) {
666         if (LinkerIsLLD)
667           *LinkerIsLLD = UseLinker == "lld";
668         return std::string(Path);
669       }
670     }
671     getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
672     return GetProgramPath(getDefaultLinker());
673   }
674   // If we're passed -fuse-ld= with no argument, or with the argument ld,
675   // then use whatever the default system linker is.
676   if (UseLinker.empty() || UseLinker == "ld") {
677     const char *DefaultLinker = getDefaultLinker();
678     if (llvm::sys::path::is_absolute(DefaultLinker))
679       return std::string(DefaultLinker);
680     else
681       return GetProgramPath(DefaultLinker);
682   }
683 
684   // Extending -fuse-ld= to an absolute or relative path is unexpected. Checking
685   // for the linker flavor is brittle. In addition, prepending "ld." or "ld64."
686   // to a relative path is surprising. This is more complex due to priorities
687   // among -B, COMPILER_PATH and PATH. --ld-path= should be used instead.
688   if (UseLinker.contains('/'))
689     getDriver().Diag(diag::warn_drv_fuse_ld_path);
690 
691   if (llvm::sys::path::is_absolute(UseLinker)) {
692     // If we're passed what looks like an absolute path, don't attempt to
693     // second-guess that.
694     if (llvm::sys::fs::can_execute(UseLinker))
695       return std::string(UseLinker);
696   } else {
697     llvm::SmallString<8> LinkerName;
698     if (Triple.isOSDarwin())
699       LinkerName.append("ld64.");
700     else
701       LinkerName.append("ld.");
702     LinkerName.append(UseLinker);
703 
704     std::string LinkerPath(GetProgramPath(LinkerName.c_str()));
705     if (llvm::sys::fs::can_execute(LinkerPath)) {
706       if (LinkerIsLLD)
707         *LinkerIsLLD = UseLinker == "lld";
708       return LinkerPath;
709     }
710   }
711 
712   if (A)
713     getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
714 
715   return GetProgramPath(getDefaultLinker());
716 }
717 
718 std::string ToolChain::GetStaticLibToolPath() const {
719   // TODO: Add support for static lib archiving on Windows
720   if (Triple.isOSDarwin())
721     return GetProgramPath("libtool");
722   return GetProgramPath("llvm-ar");
723 }
724 
725 types::ID ToolChain::LookupTypeForExtension(StringRef Ext) const {
726   types::ID id = types::lookupTypeForExtension(Ext);
727 
728   // Flang always runs the preprocessor and has no notion of "preprocessed
729   // fortran". Here, TY_PP_Fortran is coerced to TY_Fortran to avoid treating
730   // them differently.
731   if (D.IsFlangMode() && id == types::TY_PP_Fortran)
732     id = types::TY_Fortran;
733 
734   return id;
735 }
736 
737 bool ToolChain::HasNativeLLVMSupport() const {
738   return false;
739 }
740 
741 bool ToolChain::isCrossCompiling() const {
742   llvm::Triple HostTriple(LLVM_HOST_TRIPLE);
743   switch (HostTriple.getArch()) {
744   // The A32/T32/T16 instruction sets are not separate architectures in this
745   // context.
746   case llvm::Triple::arm:
747   case llvm::Triple::armeb:
748   case llvm::Triple::thumb:
749   case llvm::Triple::thumbeb:
750     return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb &&
751            getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb;
752   default:
753     return HostTriple.getArch() != getArch();
754   }
755 }
756 
757 ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
758   return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
759                      VersionTuple());
760 }
761 
762 llvm::ExceptionHandling
763 ToolChain::GetExceptionModel(const llvm::opt::ArgList &Args) const {
764   return llvm::ExceptionHandling::None;
765 }
766 
767 bool ToolChain::isThreadModelSupported(const StringRef Model) const {
768   if (Model == "single") {
769     // FIXME: 'single' is only supported on ARM and WebAssembly so far.
770     return Triple.getArch() == llvm::Triple::arm ||
771            Triple.getArch() == llvm::Triple::armeb ||
772            Triple.getArch() == llvm::Triple::thumb ||
773            Triple.getArch() == llvm::Triple::thumbeb || Triple.isWasm();
774   } else if (Model == "posix")
775     return true;
776 
777   return false;
778 }
779 
780 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
781                                          types::ID InputType) const {
782   switch (getTriple().getArch()) {
783   default:
784     return getTripleString();
785 
786   case llvm::Triple::x86_64: {
787     llvm::Triple Triple = getTriple();
788     if (!Triple.isOSBinFormatMachO())
789       return getTripleString();
790 
791     if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
792       // x86_64h goes in the triple. Other -march options just use the
793       // vanilla triple we already have.
794       StringRef MArch = A->getValue();
795       if (MArch == "x86_64h")
796         Triple.setArchName(MArch);
797     }
798     return Triple.getTriple();
799   }
800   case llvm::Triple::aarch64: {
801     llvm::Triple Triple = getTriple();
802     if (!Triple.isOSBinFormatMachO())
803       return getTripleString();
804 
805     if (Triple.isArm64e())
806       return getTripleString();
807 
808     // FIXME: older versions of ld64 expect the "arm64" component in the actual
809     // triple string and query it to determine whether an LTO file can be
810     // handled. Remove this when we don't care any more.
811     Triple.setArchName("arm64");
812     return Triple.getTriple();
813   }
814   case llvm::Triple::aarch64_32:
815     return getTripleString();
816   case llvm::Triple::arm:
817   case llvm::Triple::armeb:
818   case llvm::Triple::thumb:
819   case llvm::Triple::thumbeb: {
820     llvm::Triple Triple = getTriple();
821     tools::arm::setArchNameInTriple(getDriver(), Args, InputType, Triple);
822     tools::arm::setFloatABIInTriple(getDriver(), Args, Triple);
823     return Triple.getTriple();
824   }
825   }
826 }
827 
828 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
829                                                    types::ID InputType) const {
830   return ComputeLLVMTriple(Args, InputType);
831 }
832 
833 std::string ToolChain::computeSysRoot() const {
834   return D.SysRoot;
835 }
836 
837 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
838                                           ArgStringList &CC1Args) const {
839   // Each toolchain should provide the appropriate include flags.
840 }
841 
842 void ToolChain::addClangTargetOptions(
843     const ArgList &DriverArgs, ArgStringList &CC1Args,
844     Action::OffloadKind DeviceOffloadKind) const {}
845 
846 void ToolChain::addClangCC1ASTargetOptions(const ArgList &Args,
847                                            ArgStringList &CC1ASArgs) const {}
848 
849 void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
850 
851 void ToolChain::addProfileRTLibs(const llvm::opt::ArgList &Args,
852                                  llvm::opt::ArgStringList &CmdArgs) const {
853   if (!needsProfileRT(Args) && !needsGCovInstrumentation(Args))
854     return;
855 
856   CmdArgs.push_back(getCompilerRTArgString(Args, "profile"));
857 }
858 
859 ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
860     const ArgList &Args) const {
861   if (runtimeLibType)
862     return *runtimeLibType;
863 
864   const Arg* A = Args.getLastArg(options::OPT_rtlib_EQ);
865   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_RTLIB;
866 
867   // Only use "platform" in tests to override CLANG_DEFAULT_RTLIB!
868   if (LibName == "compiler-rt")
869     runtimeLibType = ToolChain::RLT_CompilerRT;
870   else if (LibName == "libgcc")
871     runtimeLibType = ToolChain::RLT_Libgcc;
872   else if (LibName == "platform")
873     runtimeLibType = GetDefaultRuntimeLibType();
874   else {
875     if (A)
876       getDriver().Diag(diag::err_drv_invalid_rtlib_name)
877           << A->getAsString(Args);
878 
879     runtimeLibType = GetDefaultRuntimeLibType();
880   }
881 
882   return *runtimeLibType;
883 }
884 
885 ToolChain::UnwindLibType ToolChain::GetUnwindLibType(
886     const ArgList &Args) const {
887   if (unwindLibType)
888     return *unwindLibType;
889 
890   const Arg *A = Args.getLastArg(options::OPT_unwindlib_EQ);
891   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_UNWINDLIB;
892 
893   if (LibName == "none")
894     unwindLibType = ToolChain::UNW_None;
895   else if (LibName == "platform" || LibName == "") {
896     ToolChain::RuntimeLibType RtLibType = GetRuntimeLibType(Args);
897     if (RtLibType == ToolChain::RLT_CompilerRT) {
898       if (getTriple().isAndroid() || getTriple().isOSAIX())
899         unwindLibType = ToolChain::UNW_CompilerRT;
900       else
901         unwindLibType = ToolChain::UNW_None;
902     } else if (RtLibType == ToolChain::RLT_Libgcc)
903       unwindLibType = ToolChain::UNW_Libgcc;
904   } else if (LibName == "libunwind") {
905     if (GetRuntimeLibType(Args) == RLT_Libgcc)
906       getDriver().Diag(diag::err_drv_incompatible_unwindlib);
907     unwindLibType = ToolChain::UNW_CompilerRT;
908   } else if (LibName == "libgcc")
909     unwindLibType = ToolChain::UNW_Libgcc;
910   else {
911     if (A)
912       getDriver().Diag(diag::err_drv_invalid_unwindlib_name)
913           << A->getAsString(Args);
914 
915     unwindLibType = GetDefaultUnwindLibType();
916   }
917 
918   return *unwindLibType;
919 }
920 
921 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
922   if (cxxStdlibType)
923     return *cxxStdlibType;
924 
925   const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
926   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_CXX_STDLIB;
927 
928   // Only use "platform" in tests to override CLANG_DEFAULT_CXX_STDLIB!
929   if (LibName == "libc++")
930     cxxStdlibType = ToolChain::CST_Libcxx;
931   else if (LibName == "libstdc++")
932     cxxStdlibType = ToolChain::CST_Libstdcxx;
933   else if (LibName == "platform")
934     cxxStdlibType = GetDefaultCXXStdlibType();
935   else {
936     if (A)
937       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
938           << A->getAsString(Args);
939 
940     cxxStdlibType = GetDefaultCXXStdlibType();
941   }
942 
943   return *cxxStdlibType;
944 }
945 
946 /// Utility function to add a system include directory to CC1 arguments.
947 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
948                                             ArgStringList &CC1Args,
949                                             const Twine &Path) {
950   CC1Args.push_back("-internal-isystem");
951   CC1Args.push_back(DriverArgs.MakeArgString(Path));
952 }
953 
954 /// Utility function to add a system include directory with extern "C"
955 /// semantics to CC1 arguments.
956 ///
957 /// Note that this should be used rarely, and only for directories that
958 /// historically and for legacy reasons are treated as having implicit extern
959 /// "C" semantics. These semantics are *ignored* by and large today, but its
960 /// important to preserve the preprocessor changes resulting from the
961 /// classification.
962 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
963                                                    ArgStringList &CC1Args,
964                                                    const Twine &Path) {
965   CC1Args.push_back("-internal-externc-isystem");
966   CC1Args.push_back(DriverArgs.MakeArgString(Path));
967 }
968 
969 void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs,
970                                                 ArgStringList &CC1Args,
971                                                 const Twine &Path) {
972   if (llvm::sys::fs::exists(Path))
973     addExternCSystemInclude(DriverArgs, CC1Args, Path);
974 }
975 
976 /// Utility function to add a list of system include directories to CC1.
977 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
978                                              ArgStringList &CC1Args,
979                                              ArrayRef<StringRef> Paths) {
980   for (const auto &Path : Paths) {
981     CC1Args.push_back("-internal-isystem");
982     CC1Args.push_back(DriverArgs.MakeArgString(Path));
983   }
984 }
985 
986 /*static*/ std::string ToolChain::concat(StringRef Path, const Twine &A,
987                                          const Twine &B, const Twine &C,
988                                          const Twine &D) {
989   SmallString<128> Result(Path);
990   llvm::sys::path::append(Result, llvm::sys::path::Style::posix, A, B, C, D);
991   return std::string(Result);
992 }
993 
994 std::string ToolChain::detectLibcxxVersion(StringRef IncludePath) const {
995   std::error_code EC;
996   int MaxVersion = 0;
997   std::string MaxVersionString;
998   SmallString<128> Path(IncludePath);
999   llvm::sys::path::append(Path, "c++");
1000   for (llvm::vfs::directory_iterator LI = getVFS().dir_begin(Path, EC), LE;
1001        !EC && LI != LE; LI = LI.increment(EC)) {
1002     StringRef VersionText = llvm::sys::path::filename(LI->path());
1003     int Version;
1004     if (VersionText[0] == 'v' &&
1005         !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
1006       if (Version > MaxVersion) {
1007         MaxVersion = Version;
1008         MaxVersionString = std::string(VersionText);
1009       }
1010     }
1011   }
1012   if (!MaxVersion)
1013     return "";
1014   return MaxVersionString;
1015 }
1016 
1017 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
1018                                              ArgStringList &CC1Args) const {
1019   // Header search paths should be handled by each of the subclasses.
1020   // Historically, they have not been, and instead have been handled inside of
1021   // the CC1-layer frontend. As the logic is hoisted out, this generic function
1022   // will slowly stop being called.
1023   //
1024   // While it is being called, replicate a bit of a hack to propagate the
1025   // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
1026   // header search paths with it. Once all systems are overriding this
1027   // function, the CC1 flag and this line can be removed.
1028   DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
1029 }
1030 
1031 void ToolChain::AddClangCXXStdlibIsystemArgs(
1032     const llvm::opt::ArgList &DriverArgs,
1033     llvm::opt::ArgStringList &CC1Args) const {
1034   DriverArgs.ClaimAllArgs(options::OPT_stdlibxx_isystem);
1035   // This intentionally only looks at -nostdinc++, and not -nostdinc or
1036   // -nostdlibinc. The purpose of -stdlib++-isystem is to support toolchain
1037   // setups with non-standard search logic for the C++ headers, while still
1038   // allowing users of the toolchain to bring their own C++ headers. Such a
1039   // toolchain likely also has non-standard search logic for the C headers and
1040   // uses -nostdinc to suppress the default logic, but -stdlib++-isystem should
1041   // still work in that case and only be suppressed by an explicit -nostdinc++
1042   // in a project using the toolchain.
1043   if (!DriverArgs.hasArg(options::OPT_nostdincxx))
1044     for (const auto &P :
1045          DriverArgs.getAllArgValues(options::OPT_stdlibxx_isystem))
1046       addSystemInclude(DriverArgs, CC1Args, P);
1047 }
1048 
1049 bool ToolChain::ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const {
1050   return getDriver().CCCIsCXX() &&
1051          !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
1052                       options::OPT_nostdlibxx);
1053 }
1054 
1055 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
1056                                     ArgStringList &CmdArgs) const {
1057   assert(!Args.hasArg(options::OPT_nostdlibxx) &&
1058          "should not have called this");
1059   CXXStdlibType Type = GetCXXStdlibType(Args);
1060 
1061   switch (Type) {
1062   case ToolChain::CST_Libcxx:
1063     CmdArgs.push_back("-lc++");
1064     if (Args.hasArg(options::OPT_fexperimental_library))
1065       CmdArgs.push_back("-lc++experimental");
1066     break;
1067 
1068   case ToolChain::CST_Libstdcxx:
1069     CmdArgs.push_back("-lstdc++");
1070     break;
1071   }
1072 }
1073 
1074 void ToolChain::AddFilePathLibArgs(const ArgList &Args,
1075                                    ArgStringList &CmdArgs) const {
1076   for (const auto &LibPath : getFilePaths())
1077     if(LibPath.length() > 0)
1078       CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
1079 }
1080 
1081 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
1082                                  ArgStringList &CmdArgs) const {
1083   CmdArgs.push_back("-lcc_kext");
1084 }
1085 
1086 bool ToolChain::isFastMathRuntimeAvailable(const ArgList &Args,
1087                                            std::string &Path) const {
1088   // Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed
1089   // (to keep the linker options consistent with gcc and clang itself).
1090   if (!isOptimizationLevelFast(Args)) {
1091     // Check if -ffast-math or -funsafe-math.
1092     Arg *A =
1093       Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math,
1094                       options::OPT_funsafe_math_optimizations,
1095                       options::OPT_fno_unsafe_math_optimizations);
1096 
1097     if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
1098         A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
1099       return false;
1100   }
1101   // If crtfastmath.o exists add it to the arguments.
1102   Path = GetFilePath("crtfastmath.o");
1103   return (Path != "crtfastmath.o"); // Not found.
1104 }
1105 
1106 bool ToolChain::addFastMathRuntimeIfAvailable(const ArgList &Args,
1107                                               ArgStringList &CmdArgs) const {
1108   std::string Path;
1109   if (isFastMathRuntimeAvailable(Args, Path)) {
1110     CmdArgs.push_back(Args.MakeArgString(Path));
1111     return true;
1112   }
1113 
1114   return false;
1115 }
1116 
1117 Expected<SmallVector<std::string>>
1118 ToolChain::getSystemGPUArchs(const llvm::opt::ArgList &Args) const {
1119   return SmallVector<std::string>();
1120 }
1121 
1122 SanitizerMask ToolChain::getSupportedSanitizers() const {
1123   // Return sanitizers which don't require runtime support and are not
1124   // platform dependent.
1125 
1126   SanitizerMask Res =
1127       (SanitizerKind::Undefined & ~SanitizerKind::Vptr &
1128        ~SanitizerKind::Function) |
1129       (SanitizerKind::CFI & ~SanitizerKind::CFIICall) |
1130       SanitizerKind::CFICastStrict | SanitizerKind::FloatDivideByZero |
1131       SanitizerKind::KCFI | SanitizerKind::UnsignedIntegerOverflow |
1132       SanitizerKind::UnsignedShiftBase | SanitizerKind::ImplicitConversion |
1133       SanitizerKind::Nullability | SanitizerKind::LocalBounds;
1134   if (getTriple().getArch() == llvm::Triple::x86 ||
1135       getTriple().getArch() == llvm::Triple::x86_64 ||
1136       getTriple().getArch() == llvm::Triple::arm || getTriple().isWasm() ||
1137       getTriple().isAArch64() || getTriple().isRISCV())
1138     Res |= SanitizerKind::CFIICall;
1139   if (getTriple().getArch() == llvm::Triple::x86_64 ||
1140       getTriple().isAArch64(64) || getTriple().isRISCV())
1141     Res |= SanitizerKind::ShadowCallStack;
1142   if (getTriple().isAArch64(64))
1143     Res |= SanitizerKind::MemTag;
1144   return Res;
1145 }
1146 
1147 void ToolChain::AddCudaIncludeArgs(const ArgList &DriverArgs,
1148                                    ArgStringList &CC1Args) const {}
1149 
1150 void ToolChain::AddHIPIncludeArgs(const ArgList &DriverArgs,
1151                                   ArgStringList &CC1Args) const {}
1152 
1153 llvm::SmallVector<ToolChain::BitCodeLibraryInfo, 12>
1154 ToolChain::getDeviceLibs(const ArgList &DriverArgs) const {
1155   return {};
1156 }
1157 
1158 void ToolChain::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
1159                                     ArgStringList &CC1Args) const {}
1160 
1161 static VersionTuple separateMSVCFullVersion(unsigned Version) {
1162   if (Version < 100)
1163     return VersionTuple(Version);
1164 
1165   if (Version < 10000)
1166     return VersionTuple(Version / 100, Version % 100);
1167 
1168   unsigned Build = 0, Factor = 1;
1169   for (; Version > 10000; Version = Version / 10, Factor = Factor * 10)
1170     Build = Build + (Version % 10) * Factor;
1171   return VersionTuple(Version / 100, Version % 100, Build);
1172 }
1173 
1174 VersionTuple
1175 ToolChain::computeMSVCVersion(const Driver *D,
1176                               const llvm::opt::ArgList &Args) const {
1177   const Arg *MSCVersion = Args.getLastArg(options::OPT_fmsc_version);
1178   const Arg *MSCompatibilityVersion =
1179       Args.getLastArg(options::OPT_fms_compatibility_version);
1180 
1181   if (MSCVersion && MSCompatibilityVersion) {
1182     if (D)
1183       D->Diag(diag::err_drv_argument_not_allowed_with)
1184           << MSCVersion->getAsString(Args)
1185           << MSCompatibilityVersion->getAsString(Args);
1186     return VersionTuple();
1187   }
1188 
1189   if (MSCompatibilityVersion) {
1190     VersionTuple MSVT;
1191     if (MSVT.tryParse(MSCompatibilityVersion->getValue())) {
1192       if (D)
1193         D->Diag(diag::err_drv_invalid_value)
1194             << MSCompatibilityVersion->getAsString(Args)
1195             << MSCompatibilityVersion->getValue();
1196     } else {
1197       return MSVT;
1198     }
1199   }
1200 
1201   if (MSCVersion) {
1202     unsigned Version = 0;
1203     if (StringRef(MSCVersion->getValue()).getAsInteger(10, Version)) {
1204       if (D)
1205         D->Diag(diag::err_drv_invalid_value)
1206             << MSCVersion->getAsString(Args) << MSCVersion->getValue();
1207     } else {
1208       return separateMSVCFullVersion(Version);
1209     }
1210   }
1211 
1212   return VersionTuple();
1213 }
1214 
1215 llvm::opt::DerivedArgList *ToolChain::TranslateOpenMPTargetArgs(
1216     const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost,
1217     SmallVectorImpl<llvm::opt::Arg *> &AllocatedArgs) const {
1218   DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
1219   const OptTable &Opts = getDriver().getOpts();
1220   bool Modified = false;
1221 
1222   // Handle -Xopenmp-target flags
1223   for (auto *A : Args) {
1224     // Exclude flags which may only apply to the host toolchain.
1225     // Do not exclude flags when the host triple (AuxTriple)
1226     // matches the current toolchain triple. If it is not present
1227     // at all, target and host share a toolchain.
1228     if (A->getOption().matches(options::OPT_m_Group)) {
1229       if (SameTripleAsHost)
1230         DAL->append(A);
1231       else
1232         Modified = true;
1233       continue;
1234     }
1235 
1236     unsigned Index;
1237     unsigned Prev;
1238     bool XOpenMPTargetNoTriple =
1239         A->getOption().matches(options::OPT_Xopenmp_target);
1240 
1241     if (A->getOption().matches(options::OPT_Xopenmp_target_EQ)) {
1242       llvm::Triple TT(getOpenMPTriple(A->getValue(0)));
1243 
1244       // Passing device args: -Xopenmp-target=<triple> -opt=val.
1245       if (TT.getTriple() == getTripleString())
1246         Index = Args.getBaseArgs().MakeIndex(A->getValue(1));
1247       else
1248         continue;
1249     } else if (XOpenMPTargetNoTriple) {
1250       // Passing device args: -Xopenmp-target -opt=val.
1251       Index = Args.getBaseArgs().MakeIndex(A->getValue(0));
1252     } else {
1253       DAL->append(A);
1254       continue;
1255     }
1256 
1257     // Parse the argument to -Xopenmp-target.
1258     Prev = Index;
1259     std::unique_ptr<Arg> XOpenMPTargetArg(Opts.ParseOneArg(Args, Index));
1260     if (!XOpenMPTargetArg || Index > Prev + 1) {
1261       getDriver().Diag(diag::err_drv_invalid_Xopenmp_target_with_args)
1262           << A->getAsString(Args);
1263       continue;
1264     }
1265     if (XOpenMPTargetNoTriple && XOpenMPTargetArg &&
1266         Args.getAllArgValues(options::OPT_fopenmp_targets_EQ).size() != 1) {
1267       getDriver().Diag(diag::err_drv_Xopenmp_target_missing_triple);
1268       continue;
1269     }
1270     XOpenMPTargetArg->setBaseArg(A);
1271     A = XOpenMPTargetArg.release();
1272     AllocatedArgs.push_back(A);
1273     DAL->append(A);
1274     Modified = true;
1275   }
1276 
1277   if (Modified)
1278     return DAL;
1279 
1280   delete DAL;
1281   return nullptr;
1282 }
1283 
1284 // TODO: Currently argument values separated by space e.g.
1285 // -Xclang -mframe-pointer=no cannot be passed by -Xarch_. This should be
1286 // fixed.
1287 void ToolChain::TranslateXarchArgs(
1288     const llvm::opt::DerivedArgList &Args, llvm::opt::Arg *&A,
1289     llvm::opt::DerivedArgList *DAL,
1290     SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const {
1291   const OptTable &Opts = getDriver().getOpts();
1292   unsigned ValuePos = 1;
1293   if (A->getOption().matches(options::OPT_Xarch_device) ||
1294       A->getOption().matches(options::OPT_Xarch_host))
1295     ValuePos = 0;
1296 
1297   unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(ValuePos));
1298   unsigned Prev = Index;
1299   std::unique_ptr<llvm::opt::Arg> XarchArg(Opts.ParseOneArg(Args, Index));
1300 
1301   // If the argument parsing failed or more than one argument was
1302   // consumed, the -Xarch_ argument's parameter tried to consume
1303   // extra arguments. Emit an error and ignore.
1304   //
1305   // We also want to disallow any options which would alter the
1306   // driver behavior; that isn't going to work in our model. We
1307   // use options::NoXarchOption to control this.
1308   if (!XarchArg || Index > Prev + 1) {
1309     getDriver().Diag(diag::err_drv_invalid_Xarch_argument_with_args)
1310         << A->getAsString(Args);
1311     return;
1312   } else if (XarchArg->getOption().hasFlag(options::NoXarchOption)) {
1313     auto &Diags = getDriver().getDiags();
1314     unsigned DiagID =
1315         Diags.getCustomDiagID(DiagnosticsEngine::Error,
1316                               "invalid Xarch argument: '%0', not all driver "
1317                               "options can be forwared via Xarch argument");
1318     Diags.Report(DiagID) << A->getAsString(Args);
1319     return;
1320   }
1321   XarchArg->setBaseArg(A);
1322   A = XarchArg.release();
1323   if (!AllocatedArgs)
1324     DAL->AddSynthesizedArg(A);
1325   else
1326     AllocatedArgs->push_back(A);
1327 }
1328 
1329 llvm::opt::DerivedArgList *ToolChain::TranslateXarchArgs(
1330     const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
1331     Action::OffloadKind OFK,
1332     SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const {
1333   DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
1334   bool Modified = false;
1335 
1336   bool IsDevice = OFK != Action::OFK_None && OFK != Action::OFK_Host;
1337   for (Arg *A : Args) {
1338     bool NeedTrans = false;
1339     bool Skip = false;
1340     if (A->getOption().matches(options::OPT_Xarch_device)) {
1341       NeedTrans = IsDevice;
1342       Skip = !IsDevice;
1343     } else if (A->getOption().matches(options::OPT_Xarch_host)) {
1344       NeedTrans = !IsDevice;
1345       Skip = IsDevice;
1346     } else if (A->getOption().matches(options::OPT_Xarch__) && IsDevice) {
1347       // Do not translate -Xarch_ options for non CUDA/HIP toolchain since
1348       // they may need special translation.
1349       // Skip this argument unless the architecture matches BoundArch
1350       if (BoundArch.empty() || A->getValue(0) != BoundArch)
1351         Skip = true;
1352       else
1353         NeedTrans = true;
1354     }
1355     if (NeedTrans || Skip)
1356       Modified = true;
1357     if (NeedTrans)
1358       TranslateXarchArgs(Args, A, DAL, AllocatedArgs);
1359     if (!Skip)
1360       DAL->append(A);
1361   }
1362 
1363   if (Modified)
1364     return DAL;
1365 
1366   delete DAL;
1367   return nullptr;
1368 }
1369