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 CPU.
71   return (Triple.isPS4CPU()) ? ToolChain::RM_Disabled : ToolChain::RM_Enabled;
72 }
73 
74 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
75                      const ArgList &Args)
76     : D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)),
77       CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) {
78   std::string RuntimePath = getRuntimePath();
79   if (getVFS().exists(RuntimePath))
80     getLibraryPaths().push_back(RuntimePath);
81 
82   std::string StdlibPath = getStdlibPath();
83   if (getVFS().exists(StdlibPath))
84     getFilePaths().push_back(StdlibPath);
85 
86   std::string CandidateLibPath = getArchSpecificLibPath();
87   if (getVFS().exists(CandidateLibPath))
88     getFilePaths().push_back(CandidateLibPath);
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::useRelaxRelocations() const {
110   return ENABLE_X86_RELAX_RELOCATIONS;
111 }
112 
113 bool ToolChain::isNoExecStackDefault() const {
114     return false;
115 }
116 
117 SanitizerArgs
118 ToolChain::getSanitizerArgs(const llvm::opt::ArgList &JobArgs) const {
119   SanitizerArgs SanArgs(*this, JobArgs, !SanitizerArgsChecked);
120   SanitizerArgsChecked = true;
121   return SanArgs;
122 }
123 
124 const XRayArgs& ToolChain::getXRayArgs() const {
125   if (!XRayArguments.get())
126     XRayArguments.reset(new XRayArgs(*this, Args));
127   return *XRayArguments.get();
128 }
129 
130 namespace {
131 
132 struct DriverSuffix {
133   const char *Suffix;
134   const char *ModeFlag;
135 };
136 
137 } // namespace
138 
139 static const DriverSuffix *FindDriverSuffix(StringRef ProgName, size_t &Pos) {
140   // A list of known driver suffixes. Suffixes are compared against the
141   // program name in order. If there is a match, the frontend type is updated as
142   // necessary by applying the ModeFlag.
143   static const DriverSuffix DriverSuffixes[] = {
144       {"clang", nullptr},
145       {"clang++", "--driver-mode=g++"},
146       {"clang-c++", "--driver-mode=g++"},
147       {"clang-cc", nullptr},
148       {"clang-cpp", "--driver-mode=cpp"},
149       {"clang-g++", "--driver-mode=g++"},
150       {"clang-gcc", nullptr},
151       {"clang-cl", "--driver-mode=cl"},
152       {"cc", nullptr},
153       {"cpp", "--driver-mode=cpp"},
154       {"cl", "--driver-mode=cl"},
155       {"++", "--driver-mode=g++"},
156       {"flang", "--driver-mode=flang"},
157   };
158 
159   for (size_t i = 0; i < llvm::array_lengthof(DriverSuffixes); ++i) {
160     StringRef Suffix(DriverSuffixes[i].Suffix);
161     if (ProgName.endswith(Suffix)) {
162       Pos = ProgName.size() - Suffix.size();
163       return &DriverSuffixes[i];
164     }
165   }
166   return nullptr;
167 }
168 
169 /// Normalize the program name from argv[0] by stripping the file extension if
170 /// present and lower-casing the string on Windows.
171 static std::string normalizeProgramName(llvm::StringRef Argv0) {
172   std::string ProgName = std::string(llvm::sys::path::stem(Argv0));
173   if (is_style_windows(llvm::sys::path::Style::native)) {
174     // Transform to lowercase for case insensitive file systems.
175     std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(),
176                    ::tolower);
177   }
178   return ProgName;
179 }
180 
181 static const DriverSuffix *parseDriverSuffix(StringRef ProgName, size_t &Pos) {
182   // Try to infer frontend type and default target from the program name by
183   // comparing it against DriverSuffixes in order.
184 
185   // If there is a match, the function tries to identify a target as prefix.
186   // E.g. "x86_64-linux-clang" as interpreted as suffix "clang" with target
187   // prefix "x86_64-linux". If such a target prefix is found, it may be
188   // added via -target as implicit first argument.
189   const DriverSuffix *DS = FindDriverSuffix(ProgName, Pos);
190 
191   if (!DS) {
192     // Try again after stripping any trailing version number:
193     // clang++3.5 -> clang++
194     ProgName = ProgName.rtrim("0123456789.");
195     DS = FindDriverSuffix(ProgName, Pos);
196   }
197 
198   if (!DS) {
199     // Try again after stripping trailing -component.
200     // clang++-tot -> clang++
201     ProgName = ProgName.slice(0, ProgName.rfind('-'));
202     DS = FindDriverSuffix(ProgName, Pos);
203   }
204   return DS;
205 }
206 
207 ParsedClangName
208 ToolChain::getTargetAndModeFromProgramName(StringRef PN) {
209   std::string ProgName = normalizeProgramName(PN);
210   size_t SuffixPos;
211   const DriverSuffix *DS = parseDriverSuffix(ProgName, SuffixPos);
212   if (!DS)
213     return {};
214   size_t SuffixEnd = SuffixPos + strlen(DS->Suffix);
215 
216   size_t LastComponent = ProgName.rfind('-', SuffixPos);
217   if (LastComponent == std::string::npos)
218     return ParsedClangName(ProgName.substr(0, SuffixEnd), DS->ModeFlag);
219   std::string ModeSuffix = ProgName.substr(LastComponent + 1,
220                                            SuffixEnd - LastComponent - 1);
221 
222   // Infer target from the prefix.
223   StringRef Prefix(ProgName);
224   Prefix = Prefix.slice(0, LastComponent);
225   std::string IgnoredError;
226   bool IsRegistered =
227       llvm::TargetRegistry::lookupTarget(std::string(Prefix), IgnoredError);
228   return ParsedClangName{std::string(Prefix), ModeSuffix, DS->ModeFlag,
229                          IsRegistered};
230 }
231 
232 StringRef ToolChain::getDefaultUniversalArchName() const {
233   // In universal driver terms, the arch name accepted by -arch isn't exactly
234   // the same as the ones that appear in the triple. Roughly speaking, this is
235   // an inverse of the darwin::getArchTypeForDarwinArchName() function.
236   switch (Triple.getArch()) {
237   case llvm::Triple::aarch64: {
238     if (getTriple().isArm64e())
239       return "arm64e";
240     return "arm64";
241   }
242   case llvm::Triple::aarch64_32:
243     return "arm64_32";
244   case llvm::Triple::ppc:
245     return "ppc";
246   case llvm::Triple::ppcle:
247     return "ppcle";
248   case llvm::Triple::ppc64:
249     return "ppc64";
250   case llvm::Triple::ppc64le:
251     return "ppc64le";
252   default:
253     return Triple.getArchName();
254   }
255 }
256 
257 std::string ToolChain::getInputFilename(const InputInfo &Input) const {
258   return Input.getFilename();
259 }
260 
261 bool ToolChain::IsUnwindTablesDefault(const ArgList &Args) const {
262   return false;
263 }
264 
265 Tool *ToolChain::getClang() const {
266   if (!Clang)
267     Clang.reset(new tools::Clang(*this));
268   return Clang.get();
269 }
270 
271 Tool *ToolChain::getFlang() const {
272   if (!Flang)
273     Flang.reset(new tools::Flang(*this));
274   return Flang.get();
275 }
276 
277 Tool *ToolChain::buildAssembler() const {
278   return new tools::ClangAs(*this);
279 }
280 
281 Tool *ToolChain::buildLinker() const {
282   llvm_unreachable("Linking is not supported by this toolchain");
283 }
284 
285 Tool *ToolChain::buildStaticLibTool() const {
286   llvm_unreachable("Creating static lib is not supported by this toolchain");
287 }
288 
289 Tool *ToolChain::getAssemble() const {
290   if (!Assemble)
291     Assemble.reset(buildAssembler());
292   return Assemble.get();
293 }
294 
295 Tool *ToolChain::getClangAs() const {
296   if (!Assemble)
297     Assemble.reset(new tools::ClangAs(*this));
298   return Assemble.get();
299 }
300 
301 Tool *ToolChain::getLink() const {
302   if (!Link)
303     Link.reset(buildLinker());
304   return Link.get();
305 }
306 
307 Tool *ToolChain::getStaticLibTool() const {
308   if (!StaticLibTool)
309     StaticLibTool.reset(buildStaticLibTool());
310   return StaticLibTool.get();
311 }
312 
313 Tool *ToolChain::getIfsMerge() const {
314   if (!IfsMerge)
315     IfsMerge.reset(new tools::ifstool::Merger(*this));
316   return IfsMerge.get();
317 }
318 
319 Tool *ToolChain::getOffloadBundler() const {
320   if (!OffloadBundler)
321     OffloadBundler.reset(new tools::OffloadBundler(*this));
322   return OffloadBundler.get();
323 }
324 
325 Tool *ToolChain::getOffloadWrapper() const {
326   if (!OffloadWrapper)
327     OffloadWrapper.reset(new tools::OffloadWrapper(*this));
328   return OffloadWrapper.get();
329 }
330 
331 Tool *ToolChain::getTool(Action::ActionClass AC) const {
332   switch (AC) {
333   case Action::AssembleJobClass:
334     return getAssemble();
335 
336   case Action::IfsMergeJobClass:
337     return getIfsMerge();
338 
339   case Action::LinkJobClass:
340     return getLink();
341 
342   case Action::StaticLibJobClass:
343     return getStaticLibTool();
344 
345   case Action::InputClass:
346   case Action::BindArchClass:
347   case Action::OffloadClass:
348   case Action::LipoJobClass:
349   case Action::DsymutilJobClass:
350   case Action::VerifyDebugInfoJobClass:
351     llvm_unreachable("Invalid tool kind.");
352 
353   case Action::CompileJobClass:
354   case Action::PrecompileJobClass:
355   case Action::HeaderModulePrecompileJobClass:
356   case Action::PreprocessJobClass:
357   case Action::AnalyzeJobClass:
358   case Action::MigrateJobClass:
359   case Action::VerifyPCHJobClass:
360   case Action::BackendJobClass:
361     return getClang();
362 
363   case Action::OffloadBundlingJobClass:
364   case Action::OffloadUnbundlingJobClass:
365     return getOffloadBundler();
366 
367   case Action::OffloadWrapperJobClass:
368     return getOffloadWrapper();
369   }
370 
371   llvm_unreachable("Invalid tool kind.");
372 }
373 
374 static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
375                                              const ArgList &Args) {
376   const llvm::Triple &Triple = TC.getTriple();
377   bool IsWindows = Triple.isOSWindows();
378 
379   if (TC.getArch() == llvm::Triple::arm || TC.getArch() == llvm::Triple::armeb)
380     return (arm::getARMFloatABI(TC, Args) == arm::FloatABI::Hard && !IsWindows)
381                ? "armhf"
382                : "arm";
383 
384   // For historic reasons, Android library is using i686 instead of i386.
385   if (TC.getArch() == llvm::Triple::x86 && Triple.isAndroid())
386     return "i686";
387 
388   if (TC.getArch() == llvm::Triple::x86_64 && Triple.isX32())
389     return "x32";
390 
391   return llvm::Triple::getArchTypeName(TC.getArch());
392 }
393 
394 StringRef ToolChain::getOSLibName() const {
395   if (Triple.isOSDarwin())
396     return "darwin";
397 
398   switch (Triple.getOS()) {
399   case llvm::Triple::FreeBSD:
400     return "freebsd";
401   case llvm::Triple::NetBSD:
402     return "netbsd";
403   case llvm::Triple::OpenBSD:
404     return "openbsd";
405   case llvm::Triple::Solaris:
406     return "sunos";
407   case llvm::Triple::AIX:
408     return "aix";
409   default:
410     return getOS();
411   }
412 }
413 
414 std::string ToolChain::getCompilerRTPath() const {
415   SmallString<128> Path(getDriver().ResourceDir);
416   if (Triple.isOSUnknown()) {
417     llvm::sys::path::append(Path, "lib");
418   } else {
419     llvm::sys::path::append(Path, "lib", getOSLibName());
420   }
421   return std::string(Path.str());
422 }
423 
424 std::string ToolChain::getCompilerRTBasename(const ArgList &Args,
425                                              StringRef Component,
426                                              FileType Type) const {
427   std::string CRTAbsolutePath = getCompilerRT(Args, Component, Type);
428   return llvm::sys::path::filename(CRTAbsolutePath).str();
429 }
430 
431 std::string ToolChain::buildCompilerRTBasename(const llvm::opt::ArgList &Args,
432                                                StringRef Component,
433                                                FileType Type,
434                                                bool AddArch) const {
435   const llvm::Triple &TT = getTriple();
436   bool IsITANMSVCWindows =
437       TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment();
438 
439   const char *Prefix =
440       IsITANMSVCWindows || Type == ToolChain::FT_Object ? "" : "lib";
441   const char *Suffix;
442   switch (Type) {
443   case ToolChain::FT_Object:
444     Suffix = IsITANMSVCWindows ? ".obj" : ".o";
445     break;
446   case ToolChain::FT_Static:
447     Suffix = IsITANMSVCWindows ? ".lib" : ".a";
448     break;
449   case ToolChain::FT_Shared:
450     Suffix = TT.isOSWindows()
451                  ? (TT.isWindowsGNUEnvironment() ? ".dll.a" : ".lib")
452                  : ".so";
453     break;
454   }
455 
456   std::string ArchAndEnv;
457   if (AddArch) {
458     StringRef Arch = getArchNameForCompilerRTLib(*this, Args);
459     const char *Env = TT.isAndroid() ? "-android" : "";
460     ArchAndEnv = ("-" + Arch + Env).str();
461   }
462   return (Prefix + Twine("clang_rt.") + Component + ArchAndEnv + Suffix).str();
463 }
464 
465 std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef Component,
466                                      FileType Type) const {
467   // Check for runtime files in the new layout without the architecture first.
468   std::string CRTBasename =
469       buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/false);
470   for (const auto &LibPath : getLibraryPaths()) {
471     SmallString<128> P(LibPath);
472     llvm::sys::path::append(P, CRTBasename);
473     if (getVFS().exists(P))
474       return std::string(P.str());
475   }
476 
477   // Fall back to the old expected compiler-rt name if the new one does not
478   // exist.
479   CRTBasename =
480       buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/true);
481   SmallString<128> Path(getCompilerRTPath());
482   llvm::sys::path::append(Path, CRTBasename);
483   return std::string(Path.str());
484 }
485 
486 const char *ToolChain::getCompilerRTArgString(const llvm::opt::ArgList &Args,
487                                               StringRef Component,
488                                               FileType Type) const {
489   return Args.MakeArgString(getCompilerRT(Args, Component, Type));
490 }
491 
492 std::string ToolChain::getRuntimePath() const {
493   SmallString<128> P(D.ResourceDir);
494   llvm::sys::path::append(P, "lib", getTripleString());
495   return std::string(P.str());
496 }
497 
498 std::string ToolChain::getStdlibPath() const {
499   SmallString<128> P(D.Dir);
500   llvm::sys::path::append(P, "..", "lib", getTripleString());
501   return std::string(P.str());
502 }
503 
504 std::string ToolChain::getArchSpecificLibPath() const {
505   SmallString<128> Path(getDriver().ResourceDir);
506   llvm::sys::path::append(Path, "lib", getOSLibName(),
507                           llvm::Triple::getArchTypeName(getArch()));
508   return std::string(Path.str());
509 }
510 
511 bool ToolChain::needsProfileRT(const ArgList &Args) {
512   if (Args.hasArg(options::OPT_noprofilelib))
513     return false;
514 
515   return Args.hasArg(options::OPT_fprofile_generate) ||
516          Args.hasArg(options::OPT_fprofile_generate_EQ) ||
517          Args.hasArg(options::OPT_fcs_profile_generate) ||
518          Args.hasArg(options::OPT_fcs_profile_generate_EQ) ||
519          Args.hasArg(options::OPT_fprofile_instr_generate) ||
520          Args.hasArg(options::OPT_fprofile_instr_generate_EQ) ||
521          Args.hasArg(options::OPT_fcreate_profile) ||
522          Args.hasArg(options::OPT_forder_file_instrumentation);
523 }
524 
525 bool ToolChain::needsGCovInstrumentation(const llvm::opt::ArgList &Args) {
526   return Args.hasArg(options::OPT_coverage) ||
527          Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
528                       false);
529 }
530 
531 Tool *ToolChain::SelectTool(const JobAction &JA) const {
532   if (D.IsFlangMode() && getDriver().ShouldUseFlangCompiler(JA)) return getFlang();
533   if (getDriver().ShouldUseClangCompiler(JA)) return getClang();
534   Action::ActionClass AC = JA.getKind();
535   if (AC == Action::AssembleJobClass && useIntegratedAs())
536     return getClangAs();
537   return getTool(AC);
538 }
539 
540 std::string ToolChain::GetFilePath(const char *Name) const {
541   return D.GetFilePath(Name, *this);
542 }
543 
544 std::string ToolChain::GetProgramPath(const char *Name) const {
545   return D.GetProgramPath(Name, *this);
546 }
547 
548 std::string ToolChain::GetLinkerPath(bool *LinkerIsLLD,
549                                      bool *LinkerIsLLDDarwinNew) const {
550   if (LinkerIsLLD)
551     *LinkerIsLLD = false;
552   if (LinkerIsLLDDarwinNew)
553     *LinkerIsLLDDarwinNew = false;
554 
555   // Get -fuse-ld= first to prevent -Wunused-command-line-argument. -fuse-ld= is
556   // considered as the linker flavor, e.g. "bfd", "gold", or "lld".
557   const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ);
558   StringRef UseLinker = A ? A->getValue() : CLANG_DEFAULT_LINKER;
559 
560   // --ld-path= takes precedence over -fuse-ld= and specifies the executable
561   // name. -B, COMPILER_PATH and PATH and consulted if the value does not
562   // contain a path component separator.
563   if (const Arg *A = Args.getLastArg(options::OPT_ld_path_EQ)) {
564     std::string Path(A->getValue());
565     if (!Path.empty()) {
566       if (llvm::sys::path::parent_path(Path).empty())
567         Path = GetProgramPath(A->getValue());
568       if (llvm::sys::fs::can_execute(Path))
569         return std::string(Path);
570     }
571     getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
572     return GetProgramPath(getDefaultLinker());
573   }
574   // If we're passed -fuse-ld= with no argument, or with the argument ld,
575   // then use whatever the default system linker is.
576   if (UseLinker.empty() || UseLinker == "ld") {
577     const char *DefaultLinker = getDefaultLinker();
578     if (llvm::sys::path::is_absolute(DefaultLinker))
579       return std::string(DefaultLinker);
580     else
581       return GetProgramPath(DefaultLinker);
582   }
583 
584   // Extending -fuse-ld= to an absolute or relative path is unexpected. Checking
585   // for the linker flavor is brittle. In addition, prepending "ld." or "ld64."
586   // to a relative path is surprising. This is more complex due to priorities
587   // among -B, COMPILER_PATH and PATH. --ld-path= should be used instead.
588   if (UseLinker.contains('/'))
589     getDriver().Diag(diag::warn_drv_fuse_ld_path);
590 
591   if (llvm::sys::path::is_absolute(UseLinker)) {
592     // If we're passed what looks like an absolute path, don't attempt to
593     // second-guess that.
594     if (llvm::sys::fs::can_execute(UseLinker))
595       return std::string(UseLinker);
596   } else {
597     llvm::SmallString<8> LinkerName;
598     if (Triple.isOSDarwin())
599       LinkerName.append("ld64.");
600     else
601       LinkerName.append("ld.");
602     LinkerName.append(UseLinker);
603 
604     std::string LinkerPath(GetProgramPath(LinkerName.c_str()));
605     if (llvm::sys::fs::can_execute(LinkerPath)) {
606       // FIXME: Remove LinkerIsLLDDarwinNew once there's only one MachO lld.
607       if (LinkerIsLLD)
608         *LinkerIsLLD = UseLinker == "lld" || UseLinker == "lld.darwinold";
609       if (LinkerIsLLDDarwinNew)
610         *LinkerIsLLDDarwinNew = UseLinker == "lld";
611       return LinkerPath;
612     }
613   }
614 
615   if (A)
616     getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
617 
618   return GetProgramPath(getDefaultLinker());
619 }
620 
621 std::string ToolChain::GetStaticLibToolPath() const {
622   // TODO: Add support for static lib archiving on Windows
623   if (Triple.isOSDarwin())
624     return GetProgramPath("libtool");
625   return GetProgramPath("llvm-ar");
626 }
627 
628 types::ID ToolChain::LookupTypeForExtension(StringRef Ext) const {
629   types::ID id = types::lookupTypeForExtension(Ext);
630 
631   // Flang always runs the preprocessor and has no notion of "preprocessed
632   // fortran". Here, TY_PP_Fortran is coerced to TY_Fortran to avoid treating
633   // them differently.
634   if (D.IsFlangMode() && id == types::TY_PP_Fortran)
635     id = types::TY_Fortran;
636 
637   return id;
638 }
639 
640 bool ToolChain::HasNativeLLVMSupport() const {
641   return false;
642 }
643 
644 bool ToolChain::isCrossCompiling() const {
645   llvm::Triple HostTriple(LLVM_HOST_TRIPLE);
646   switch (HostTriple.getArch()) {
647   // The A32/T32/T16 instruction sets are not separate architectures in this
648   // context.
649   case llvm::Triple::arm:
650   case llvm::Triple::armeb:
651   case llvm::Triple::thumb:
652   case llvm::Triple::thumbeb:
653     return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb &&
654            getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb;
655   default:
656     return HostTriple.getArch() != getArch();
657   }
658 }
659 
660 ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const {
661   return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
662                      VersionTuple());
663 }
664 
665 llvm::ExceptionHandling
666 ToolChain::GetExceptionModel(const llvm::opt::ArgList &Args) const {
667   return llvm::ExceptionHandling::None;
668 }
669 
670 bool ToolChain::isThreadModelSupported(const StringRef Model) const {
671   if (Model == "single") {
672     // FIXME: 'single' is only supported on ARM and WebAssembly so far.
673     return Triple.getArch() == llvm::Triple::arm ||
674            Triple.getArch() == llvm::Triple::armeb ||
675            Triple.getArch() == llvm::Triple::thumb ||
676            Triple.getArch() == llvm::Triple::thumbeb || Triple.isWasm();
677   } else if (Model == "posix")
678     return true;
679 
680   return false;
681 }
682 
683 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
684                                          types::ID InputType) const {
685   switch (getTriple().getArch()) {
686   default:
687     return getTripleString();
688 
689   case llvm::Triple::x86_64: {
690     llvm::Triple Triple = getTriple();
691     if (!Triple.isOSBinFormatMachO())
692       return getTripleString();
693 
694     if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
695       // x86_64h goes in the triple. Other -march options just use the
696       // vanilla triple we already have.
697       StringRef MArch = A->getValue();
698       if (MArch == "x86_64h")
699         Triple.setArchName(MArch);
700     }
701     return Triple.getTriple();
702   }
703   case llvm::Triple::aarch64: {
704     llvm::Triple Triple = getTriple();
705     if (!Triple.isOSBinFormatMachO())
706       return getTripleString();
707 
708     if (Triple.isArm64e())
709       return getTripleString();
710 
711     // FIXME: older versions of ld64 expect the "arm64" component in the actual
712     // triple string and query it to determine whether an LTO file can be
713     // handled. Remove this when we don't care any more.
714     Triple.setArchName("arm64");
715     return Triple.getTriple();
716   }
717   case llvm::Triple::aarch64_32:
718     return getTripleString();
719   case llvm::Triple::arm:
720   case llvm::Triple::armeb:
721   case llvm::Triple::thumb:
722   case llvm::Triple::thumbeb: {
723     llvm::Triple Triple = getTriple();
724     tools::arm::setArchNameInTriple(getDriver(), Args, InputType, Triple);
725     tools::arm::setFloatABIInTriple(getDriver(), Args, Triple);
726     return Triple.getTriple();
727   }
728   }
729 }
730 
731 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
732                                                    types::ID InputType) const {
733   return ComputeLLVMTriple(Args, InputType);
734 }
735 
736 std::string ToolChain::computeSysRoot() const {
737   return D.SysRoot;
738 }
739 
740 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
741                                           ArgStringList &CC1Args) const {
742   // Each toolchain should provide the appropriate include flags.
743 }
744 
745 void ToolChain::addClangTargetOptions(
746     const ArgList &DriverArgs, ArgStringList &CC1Args,
747     Action::OffloadKind DeviceOffloadKind) const {}
748 
749 void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
750 
751 void ToolChain::addProfileRTLibs(const llvm::opt::ArgList &Args,
752                                  llvm::opt::ArgStringList &CmdArgs) const {
753   if (!needsProfileRT(Args) && !needsGCovInstrumentation(Args))
754     return;
755 
756   CmdArgs.push_back(getCompilerRTArgString(Args, "profile"));
757 }
758 
759 ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType(
760     const ArgList &Args) const {
761   if (runtimeLibType)
762     return *runtimeLibType;
763 
764   const Arg* A = Args.getLastArg(options::OPT_rtlib_EQ);
765   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_RTLIB;
766 
767   // Only use "platform" in tests to override CLANG_DEFAULT_RTLIB!
768   if (LibName == "compiler-rt")
769     runtimeLibType = ToolChain::RLT_CompilerRT;
770   else if (LibName == "libgcc")
771     runtimeLibType = ToolChain::RLT_Libgcc;
772   else if (LibName == "platform")
773     runtimeLibType = GetDefaultRuntimeLibType();
774   else {
775     if (A)
776       getDriver().Diag(diag::err_drv_invalid_rtlib_name)
777           << A->getAsString(Args);
778 
779     runtimeLibType = GetDefaultRuntimeLibType();
780   }
781 
782   return *runtimeLibType;
783 }
784 
785 ToolChain::UnwindLibType ToolChain::GetUnwindLibType(
786     const ArgList &Args) const {
787   if (unwindLibType)
788     return *unwindLibType;
789 
790   const Arg *A = Args.getLastArg(options::OPT_unwindlib_EQ);
791   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_UNWINDLIB;
792 
793   if (LibName == "none")
794     unwindLibType = ToolChain::UNW_None;
795   else if (LibName == "platform" || LibName == "") {
796     ToolChain::RuntimeLibType RtLibType = GetRuntimeLibType(Args);
797     if (RtLibType == ToolChain::RLT_CompilerRT) {
798       if (getTriple().isAndroid() || getTriple().isOSAIX())
799         unwindLibType = ToolChain::UNW_CompilerRT;
800       else
801         unwindLibType = ToolChain::UNW_None;
802     } else if (RtLibType == ToolChain::RLT_Libgcc)
803       unwindLibType = ToolChain::UNW_Libgcc;
804   } else if (LibName == "libunwind") {
805     if (GetRuntimeLibType(Args) == RLT_Libgcc)
806       getDriver().Diag(diag::err_drv_incompatible_unwindlib);
807     unwindLibType = ToolChain::UNW_CompilerRT;
808   } else if (LibName == "libgcc")
809     unwindLibType = ToolChain::UNW_Libgcc;
810   else {
811     if (A)
812       getDriver().Diag(diag::err_drv_invalid_unwindlib_name)
813           << A->getAsString(Args);
814 
815     unwindLibType = GetDefaultUnwindLibType();
816   }
817 
818   return *unwindLibType;
819 }
820 
821 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
822   if (cxxStdlibType)
823     return *cxxStdlibType;
824 
825   const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
826   StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_CXX_STDLIB;
827 
828   // Only use "platform" in tests to override CLANG_DEFAULT_CXX_STDLIB!
829   if (LibName == "libc++")
830     cxxStdlibType = ToolChain::CST_Libcxx;
831   else if (LibName == "libstdc++")
832     cxxStdlibType = ToolChain::CST_Libstdcxx;
833   else if (LibName == "platform")
834     cxxStdlibType = GetDefaultCXXStdlibType();
835   else {
836     if (A)
837       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
838           << A->getAsString(Args);
839 
840     cxxStdlibType = GetDefaultCXXStdlibType();
841   }
842 
843   return *cxxStdlibType;
844 }
845 
846 /// Utility function to add a system include directory to CC1 arguments.
847 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
848                                             ArgStringList &CC1Args,
849                                             const Twine &Path) {
850   CC1Args.push_back("-internal-isystem");
851   CC1Args.push_back(DriverArgs.MakeArgString(Path));
852 }
853 
854 /// Utility function to add a system include directory with extern "C"
855 /// semantics to CC1 arguments.
856 ///
857 /// Note that this should be used rarely, and only for directories that
858 /// historically and for legacy reasons are treated as having implicit extern
859 /// "C" semantics. These semantics are *ignored* by and large today, but its
860 /// important to preserve the preprocessor changes resulting from the
861 /// classification.
862 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
863                                                    ArgStringList &CC1Args,
864                                                    const Twine &Path) {
865   CC1Args.push_back("-internal-externc-isystem");
866   CC1Args.push_back(DriverArgs.MakeArgString(Path));
867 }
868 
869 void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs,
870                                                 ArgStringList &CC1Args,
871                                                 const Twine &Path) {
872   if (llvm::sys::fs::exists(Path))
873     addExternCSystemInclude(DriverArgs, CC1Args, Path);
874 }
875 
876 /// Utility function to add a list of system include directories to CC1.
877 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
878                                              ArgStringList &CC1Args,
879                                              ArrayRef<StringRef> Paths) {
880   for (const auto &Path : Paths) {
881     CC1Args.push_back("-internal-isystem");
882     CC1Args.push_back(DriverArgs.MakeArgString(Path));
883   }
884 }
885 
886 std::string ToolChain::detectLibcxxVersion(StringRef IncludePath) const {
887   std::error_code EC;
888   int MaxVersion = 0;
889   std::string MaxVersionString;
890   SmallString<128> Path(IncludePath);
891   llvm::sys::path::append(Path, "c++");
892   for (llvm::vfs::directory_iterator LI = getVFS().dir_begin(Path, EC), LE;
893        !EC && LI != LE; LI = LI.increment(EC)) {
894     StringRef VersionText = llvm::sys::path::filename(LI->path());
895     int Version;
896     if (VersionText[0] == 'v' &&
897         !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
898       if (Version > MaxVersion) {
899         MaxVersion = Version;
900         MaxVersionString = std::string(VersionText);
901       }
902     }
903   }
904   if (!MaxVersion)
905     return "";
906   return MaxVersionString;
907 }
908 
909 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
910                                              ArgStringList &CC1Args) const {
911   // Header search paths should be handled by each of the subclasses.
912   // Historically, they have not been, and instead have been handled inside of
913   // the CC1-layer frontend. As the logic is hoisted out, this generic function
914   // will slowly stop being called.
915   //
916   // While it is being called, replicate a bit of a hack to propagate the
917   // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
918   // header search paths with it. Once all systems are overriding this
919   // function, the CC1 flag and this line can be removed.
920   DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
921 }
922 
923 void ToolChain::AddClangCXXStdlibIsystemArgs(
924     const llvm::opt::ArgList &DriverArgs,
925     llvm::opt::ArgStringList &CC1Args) const {
926   DriverArgs.ClaimAllArgs(options::OPT_stdlibxx_isystem);
927   if (!DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdincxx,
928                          options::OPT_nostdlibinc))
929     for (const auto &P :
930          DriverArgs.getAllArgValues(options::OPT_stdlibxx_isystem))
931       addSystemInclude(DriverArgs, CC1Args, P);
932 }
933 
934 bool ToolChain::ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const {
935   return getDriver().CCCIsCXX() &&
936          !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
937                       options::OPT_nostdlibxx);
938 }
939 
940 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
941                                     ArgStringList &CmdArgs) const {
942   assert(!Args.hasArg(options::OPT_nostdlibxx) &&
943          "should not have called this");
944   CXXStdlibType Type = GetCXXStdlibType(Args);
945 
946   switch (Type) {
947   case ToolChain::CST_Libcxx:
948     CmdArgs.push_back("-lc++");
949     break;
950 
951   case ToolChain::CST_Libstdcxx:
952     CmdArgs.push_back("-lstdc++");
953     break;
954   }
955 }
956 
957 void ToolChain::AddFilePathLibArgs(const ArgList &Args,
958                                    ArgStringList &CmdArgs) const {
959   for (const auto &LibPath : getFilePaths())
960     if(LibPath.length() > 0)
961       CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
962 }
963 
964 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
965                                  ArgStringList &CmdArgs) const {
966   CmdArgs.push_back("-lcc_kext");
967 }
968 
969 bool ToolChain::isFastMathRuntimeAvailable(const ArgList &Args,
970                                            std::string &Path) const {
971   // Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed
972   // (to keep the linker options consistent with gcc and clang itself).
973   if (!isOptimizationLevelFast(Args)) {
974     // Check if -ffast-math or -funsafe-math.
975     Arg *A =
976       Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math,
977                       options::OPT_funsafe_math_optimizations,
978                       options::OPT_fno_unsafe_math_optimizations);
979 
980     if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
981         A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
982       return false;
983   }
984   // If crtfastmath.o exists add it to the arguments.
985   Path = GetFilePath("crtfastmath.o");
986   return (Path != "crtfastmath.o"); // Not found.
987 }
988 
989 bool ToolChain::addFastMathRuntimeIfAvailable(const ArgList &Args,
990                                               ArgStringList &CmdArgs) const {
991   std::string Path;
992   if (isFastMathRuntimeAvailable(Args, Path)) {
993     CmdArgs.push_back(Args.MakeArgString(Path));
994     return true;
995   }
996 
997   return false;
998 }
999 
1000 SanitizerMask ToolChain::getSupportedSanitizers() const {
1001   // Return sanitizers which don't require runtime support and are not
1002   // platform dependent.
1003 
1004   SanitizerMask Res =
1005       (SanitizerKind::Undefined & ~SanitizerKind::Vptr &
1006        ~SanitizerKind::Function) |
1007       (SanitizerKind::CFI & ~SanitizerKind::CFIICall) |
1008       SanitizerKind::CFICastStrict | SanitizerKind::FloatDivideByZero |
1009       SanitizerKind::UnsignedIntegerOverflow |
1010       SanitizerKind::UnsignedShiftBase | SanitizerKind::ImplicitConversion |
1011       SanitizerKind::Nullability | SanitizerKind::LocalBounds;
1012   if (getTriple().getArch() == llvm::Triple::x86 ||
1013       getTriple().getArch() == llvm::Triple::x86_64 ||
1014       getTriple().getArch() == llvm::Triple::arm || getTriple().isWasm() ||
1015       getTriple().isAArch64())
1016     Res |= SanitizerKind::CFIICall;
1017   if (getTriple().getArch() == llvm::Triple::x86_64 ||
1018       getTriple().isAArch64(64) || getTriple().isRISCV())
1019     Res |= SanitizerKind::ShadowCallStack;
1020   if (getTriple().isAArch64(64))
1021     Res |= SanitizerKind::MemTag;
1022   return Res;
1023 }
1024 
1025 void ToolChain::AddCudaIncludeArgs(const ArgList &DriverArgs,
1026                                    ArgStringList &CC1Args) const {}
1027 
1028 void ToolChain::AddHIPIncludeArgs(const ArgList &DriverArgs,
1029                                   ArgStringList &CC1Args) const {}
1030 
1031 llvm::SmallVector<ToolChain::BitCodeLibraryInfo, 12>
1032 ToolChain::getHIPDeviceLibs(const ArgList &DriverArgs) const {
1033   return {};
1034 }
1035 
1036 void ToolChain::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
1037                                     ArgStringList &CC1Args) const {}
1038 
1039 static VersionTuple separateMSVCFullVersion(unsigned Version) {
1040   if (Version < 100)
1041     return VersionTuple(Version);
1042 
1043   if (Version < 10000)
1044     return VersionTuple(Version / 100, Version % 100);
1045 
1046   unsigned Build = 0, Factor = 1;
1047   for (; Version > 10000; Version = Version / 10, Factor = Factor * 10)
1048     Build = Build + (Version % 10) * Factor;
1049   return VersionTuple(Version / 100, Version % 100, Build);
1050 }
1051 
1052 VersionTuple
1053 ToolChain::computeMSVCVersion(const Driver *D,
1054                               const llvm::opt::ArgList &Args) const {
1055   const Arg *MSCVersion = Args.getLastArg(options::OPT_fmsc_version);
1056   const Arg *MSCompatibilityVersion =
1057       Args.getLastArg(options::OPT_fms_compatibility_version);
1058 
1059   if (MSCVersion && MSCompatibilityVersion) {
1060     if (D)
1061       D->Diag(diag::err_drv_argument_not_allowed_with)
1062           << MSCVersion->getAsString(Args)
1063           << MSCompatibilityVersion->getAsString(Args);
1064     return VersionTuple();
1065   }
1066 
1067   if (MSCompatibilityVersion) {
1068     VersionTuple MSVT;
1069     if (MSVT.tryParse(MSCompatibilityVersion->getValue())) {
1070       if (D)
1071         D->Diag(diag::err_drv_invalid_value)
1072             << MSCompatibilityVersion->getAsString(Args)
1073             << MSCompatibilityVersion->getValue();
1074     } else {
1075       return MSVT;
1076     }
1077   }
1078 
1079   if (MSCVersion) {
1080     unsigned Version = 0;
1081     if (StringRef(MSCVersion->getValue()).getAsInteger(10, Version)) {
1082       if (D)
1083         D->Diag(diag::err_drv_invalid_value)
1084             << MSCVersion->getAsString(Args) << MSCVersion->getValue();
1085     } else {
1086       return separateMSVCFullVersion(Version);
1087     }
1088   }
1089 
1090   return VersionTuple();
1091 }
1092 
1093 llvm::opt::DerivedArgList *ToolChain::TranslateOpenMPTargetArgs(
1094     const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost,
1095     SmallVectorImpl<llvm::opt::Arg *> &AllocatedArgs) const {
1096   DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
1097   const OptTable &Opts = getDriver().getOpts();
1098   bool Modified = false;
1099 
1100   // Handle -Xopenmp-target flags
1101   for (auto *A : Args) {
1102     // Exclude flags which may only apply to the host toolchain.
1103     // Do not exclude flags when the host triple (AuxTriple)
1104     // matches the current toolchain triple. If it is not present
1105     // at all, target and host share a toolchain.
1106     if (A->getOption().matches(options::OPT_m_Group)) {
1107       if (SameTripleAsHost)
1108         DAL->append(A);
1109       else
1110         Modified = true;
1111       continue;
1112     }
1113 
1114     unsigned Index;
1115     unsigned Prev;
1116     bool XOpenMPTargetNoTriple =
1117         A->getOption().matches(options::OPT_Xopenmp_target);
1118 
1119     if (A->getOption().matches(options::OPT_Xopenmp_target_EQ)) {
1120       // Passing device args: -Xopenmp-target=<triple> -opt=val.
1121       if (A->getValue(0) == getTripleString())
1122         Index = Args.getBaseArgs().MakeIndex(A->getValue(1));
1123       else
1124         continue;
1125     } else if (XOpenMPTargetNoTriple) {
1126       // Passing device args: -Xopenmp-target -opt=val.
1127       Index = Args.getBaseArgs().MakeIndex(A->getValue(0));
1128     } else {
1129       DAL->append(A);
1130       continue;
1131     }
1132 
1133     // Parse the argument to -Xopenmp-target.
1134     Prev = Index;
1135     std::unique_ptr<Arg> XOpenMPTargetArg(Opts.ParseOneArg(Args, Index));
1136     if (!XOpenMPTargetArg || Index > Prev + 1) {
1137       getDriver().Diag(diag::err_drv_invalid_Xopenmp_target_with_args)
1138           << A->getAsString(Args);
1139       continue;
1140     }
1141     if (XOpenMPTargetNoTriple && XOpenMPTargetArg &&
1142         Args.getAllArgValues(options::OPT_fopenmp_targets_EQ).size() != 1) {
1143       getDriver().Diag(diag::err_drv_Xopenmp_target_missing_triple);
1144       continue;
1145     }
1146     XOpenMPTargetArg->setBaseArg(A);
1147     A = XOpenMPTargetArg.release();
1148     AllocatedArgs.push_back(A);
1149     DAL->append(A);
1150     Modified = true;
1151   }
1152 
1153   if (Modified)
1154     return DAL;
1155 
1156   delete DAL;
1157   return nullptr;
1158 }
1159 
1160 // TODO: Currently argument values separated by space e.g.
1161 // -Xclang -mframe-pointer=no cannot be passed by -Xarch_. This should be
1162 // fixed.
1163 void ToolChain::TranslateXarchArgs(
1164     const llvm::opt::DerivedArgList &Args, llvm::opt::Arg *&A,
1165     llvm::opt::DerivedArgList *DAL,
1166     SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const {
1167   const OptTable &Opts = getDriver().getOpts();
1168   unsigned ValuePos = 1;
1169   if (A->getOption().matches(options::OPT_Xarch_device) ||
1170       A->getOption().matches(options::OPT_Xarch_host))
1171     ValuePos = 0;
1172 
1173   unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(ValuePos));
1174   unsigned Prev = Index;
1175   std::unique_ptr<llvm::opt::Arg> XarchArg(Opts.ParseOneArg(Args, Index));
1176 
1177   // If the argument parsing failed or more than one argument was
1178   // consumed, the -Xarch_ argument's parameter tried to consume
1179   // extra arguments. Emit an error and ignore.
1180   //
1181   // We also want to disallow any options which would alter the
1182   // driver behavior; that isn't going to work in our model. We
1183   // use options::NoXarchOption to control this.
1184   if (!XarchArg || Index > Prev + 1) {
1185     getDriver().Diag(diag::err_drv_invalid_Xarch_argument_with_args)
1186         << A->getAsString(Args);
1187     return;
1188   } else if (XarchArg->getOption().hasFlag(options::NoXarchOption)) {
1189     auto &Diags = getDriver().getDiags();
1190     unsigned DiagID =
1191         Diags.getCustomDiagID(DiagnosticsEngine::Error,
1192                               "invalid Xarch argument: '%0', not all driver "
1193                               "options can be forwared via Xarch argument");
1194     Diags.Report(DiagID) << A->getAsString(Args);
1195     return;
1196   }
1197   XarchArg->setBaseArg(A);
1198   A = XarchArg.release();
1199   if (!AllocatedArgs)
1200     DAL->AddSynthesizedArg(A);
1201   else
1202     AllocatedArgs->push_back(A);
1203 }
1204 
1205 llvm::opt::DerivedArgList *ToolChain::TranslateXarchArgs(
1206     const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
1207     Action::OffloadKind OFK,
1208     SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const {
1209   DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
1210   bool Modified = false;
1211 
1212   bool IsGPU = OFK == Action::OFK_Cuda || OFK == Action::OFK_HIP;
1213   for (Arg *A : Args) {
1214     bool NeedTrans = false;
1215     bool Skip = false;
1216     if (A->getOption().matches(options::OPT_Xarch_device)) {
1217       NeedTrans = IsGPU;
1218       Skip = !IsGPU;
1219     } else if (A->getOption().matches(options::OPT_Xarch_host)) {
1220       NeedTrans = !IsGPU;
1221       Skip = IsGPU;
1222     } else if (A->getOption().matches(options::OPT_Xarch__) && IsGPU) {
1223       // Do not translate -Xarch_ options for non CUDA/HIP toolchain since
1224       // they may need special translation.
1225       // Skip this argument unless the architecture matches BoundArch
1226       if (BoundArch.empty() || A->getValue(0) != BoundArch)
1227         Skip = true;
1228       else
1229         NeedTrans = true;
1230     }
1231     if (NeedTrans || Skip)
1232       Modified = true;
1233     if (NeedTrans)
1234       TranslateXarchArgs(Args, A, DAL, AllocatedArgs);
1235     if (!Skip)
1236       DAL->append(A);
1237   }
1238 
1239   if (Modified)
1240     return DAL;
1241 
1242   delete DAL;
1243   return nullptr;
1244 }
1245