xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision fb2aa63d7dc54800d8a08df198e261a95bcefdbe)
1 //===- CompilerInvocation.cpp ---------------------------------------------===//
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/Frontend/CompilerInvocation.h"
10 #include "TestModuleFileExtension.h"
11 #include "clang/Basic/Builtins.h"
12 #include "clang/Basic/CharInfo.h"
13 #include "clang/Basic/CodeGenOptions.h"
14 #include "clang/Basic/CommentOptions.h"
15 #include "clang/Basic/DebugInfoOptions.h"
16 #include "clang/Basic/Diagnostic.h"
17 #include "clang/Basic/DiagnosticDriver.h"
18 #include "clang/Basic/DiagnosticOptions.h"
19 #include "clang/Basic/FileSystemOptions.h"
20 #include "clang/Basic/LLVM.h"
21 #include "clang/Basic/LangOptions.h"
22 #include "clang/Basic/LangStandard.h"
23 #include "clang/Basic/ObjCRuntime.h"
24 #include "clang/Basic/Sanitizers.h"
25 #include "clang/Basic/SourceLocation.h"
26 #include "clang/Basic/TargetOptions.h"
27 #include "clang/Basic/Version.h"
28 #include "clang/Basic/Visibility.h"
29 #include "clang/Basic/XRayInstr.h"
30 #include "clang/Config/config.h"
31 #include "clang/Driver/Driver.h"
32 #include "clang/Driver/DriverDiagnostic.h"
33 #include "clang/Driver/Options.h"
34 #include "clang/Frontend/CommandLineSourceLoc.h"
35 #include "clang/Frontend/DependencyOutputOptions.h"
36 #include "clang/Frontend/FrontendDiagnostic.h"
37 #include "clang/Frontend/FrontendOptions.h"
38 #include "clang/Frontend/FrontendPluginRegistry.h"
39 #include "clang/Frontend/MigratorOptions.h"
40 #include "clang/Frontend/PreprocessorOutputOptions.h"
41 #include "clang/Frontend/TextDiagnosticBuffer.h"
42 #include "clang/Frontend/Utils.h"
43 #include "clang/Lex/HeaderSearchOptions.h"
44 #include "clang/Lex/PreprocessorOptions.h"
45 #include "clang/Sema/CodeCompleteOptions.h"
46 #include "clang/Serialization/ASTBitCodes.h"
47 #include "clang/Serialization/ModuleFileExtension.h"
48 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
49 #include "llvm/ADT/APInt.h"
50 #include "llvm/ADT/ArrayRef.h"
51 #include "llvm/ADT/CachedHashString.h"
52 #include "llvm/ADT/DenseSet.h"
53 #include "llvm/ADT/FloatingPointMode.h"
54 #include "llvm/ADT/Hashing.h"
55 #include "llvm/ADT/None.h"
56 #include "llvm/ADT/Optional.h"
57 #include "llvm/ADT/STLExtras.h"
58 #include "llvm/ADT/SmallString.h"
59 #include "llvm/ADT/SmallVector.h"
60 #include "llvm/ADT/StringRef.h"
61 #include "llvm/ADT/StringSwitch.h"
62 #include "llvm/ADT/Triple.h"
63 #include "llvm/ADT/Twine.h"
64 #include "llvm/Config/llvm-config.h"
65 #include "llvm/IR/DebugInfoMetadata.h"
66 #include "llvm/Linker/Linker.h"
67 #include "llvm/MC/MCTargetOptions.h"
68 #include "llvm/Option/Arg.h"
69 #include "llvm/Option/ArgList.h"
70 #include "llvm/Option/OptSpecifier.h"
71 #include "llvm/Option/OptTable.h"
72 #include "llvm/Option/Option.h"
73 #include "llvm/ProfileData/InstrProfReader.h"
74 #include "llvm/Remarks/HotnessThresholdParser.h"
75 #include "llvm/Support/CodeGen.h"
76 #include "llvm/Support/Compiler.h"
77 #include "llvm/Support/Error.h"
78 #include "llvm/Support/ErrorHandling.h"
79 #include "llvm/Support/ErrorOr.h"
80 #include "llvm/Support/FileSystem.h"
81 #include "llvm/Support/Host.h"
82 #include "llvm/Support/MathExtras.h"
83 #include "llvm/Support/MemoryBuffer.h"
84 #include "llvm/Support/Path.h"
85 #include "llvm/Support/Process.h"
86 #include "llvm/Support/Regex.h"
87 #include "llvm/Support/VersionTuple.h"
88 #include "llvm/Support/VirtualFileSystem.h"
89 #include "llvm/Support/raw_ostream.h"
90 #include "llvm/Target/TargetOptions.h"
91 #include <algorithm>
92 #include <atomic>
93 #include <cassert>
94 #include <cstddef>
95 #include <cstring>
96 #include <memory>
97 #include <string>
98 #include <tuple>
99 #include <type_traits>
100 #include <utility>
101 #include <vector>
102 
103 using namespace clang;
104 using namespace driver;
105 using namespace options;
106 using namespace llvm::opt;
107 
108 //===----------------------------------------------------------------------===//
109 // Initialization.
110 //===----------------------------------------------------------------------===//
111 
112 CompilerInvocationRefBase::CompilerInvocationRefBase()
113     : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
114       DiagnosticOpts(new DiagnosticOptions()),
115       HeaderSearchOpts(new HeaderSearchOptions()),
116       PreprocessorOpts(new PreprocessorOptions()),
117       AnalyzerOpts(new AnalyzerOptions()) {}
118 
119 CompilerInvocationRefBase::CompilerInvocationRefBase(
120     const CompilerInvocationRefBase &X)
121     : LangOpts(new LangOptions(*X.getLangOpts())),
122       TargetOpts(new TargetOptions(X.getTargetOpts())),
123       DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
124       HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
125       PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())),
126       AnalyzerOpts(new AnalyzerOptions(*X.getAnalyzerOpts())) {}
127 
128 CompilerInvocationRefBase::CompilerInvocationRefBase(
129     CompilerInvocationRefBase &&X) = default;
130 
131 CompilerInvocationRefBase &
132 CompilerInvocationRefBase::operator=(CompilerInvocationRefBase X) {
133   LangOpts.swap(X.LangOpts);
134   TargetOpts.swap(X.TargetOpts);
135   DiagnosticOpts.swap(X.DiagnosticOpts);
136   HeaderSearchOpts.swap(X.HeaderSearchOpts);
137   PreprocessorOpts.swap(X.PreprocessorOpts);
138   AnalyzerOpts.swap(X.AnalyzerOpts);
139   return *this;
140 }
141 
142 CompilerInvocationRefBase &
143 CompilerInvocationRefBase::operator=(CompilerInvocationRefBase &&X) = default;
144 
145 CompilerInvocationRefBase::~CompilerInvocationRefBase() = default;
146 
147 //===----------------------------------------------------------------------===//
148 // Normalizers
149 //===----------------------------------------------------------------------===//
150 
151 #define SIMPLE_ENUM_VALUE_TABLE
152 #include "clang/Driver/Options.inc"
153 #undef SIMPLE_ENUM_VALUE_TABLE
154 
155 static llvm::Optional<bool> normalizeSimpleFlag(OptSpecifier Opt,
156                                                 unsigned TableIndex,
157                                                 const ArgList &Args,
158                                                 DiagnosticsEngine &Diags) {
159   if (Args.hasArg(Opt))
160     return true;
161   return None;
162 }
163 
164 static Optional<bool> normalizeSimpleNegativeFlag(OptSpecifier Opt, unsigned,
165                                                   const ArgList &Args,
166                                                   DiagnosticsEngine &) {
167   if (Args.hasArg(Opt))
168     return false;
169   return None;
170 }
171 
172 /// The tblgen-erated code passes in a fifth parameter of an arbitrary type, but
173 /// denormalizeSimpleFlags never looks at it. Avoid bloating compile-time with
174 /// unnecessary template instantiations and just ignore it with a variadic
175 /// argument.
176 static void denormalizeSimpleFlag(SmallVectorImpl<const char *> &Args,
177                                   const char *Spelling,
178                                   CompilerInvocation::StringAllocator,
179                                   Option::OptionClass, unsigned, /*T*/...) {
180   Args.push_back(Spelling);
181 }
182 
183 template <typename T> static constexpr bool is_uint64_t_convertible() {
184   return !std::is_same<T, uint64_t>::value &&
185          llvm::is_integral_or_enum<T>::value;
186 }
187 
188 template <typename T,
189           std::enable_if_t<!is_uint64_t_convertible<T>(), bool> = false>
190 static auto makeFlagToValueNormalizer(T Value) {
191   return [Value](OptSpecifier Opt, unsigned, const ArgList &Args,
192                  DiagnosticsEngine &) -> Optional<T> {
193     if (Args.hasArg(Opt))
194       return Value;
195     return None;
196   };
197 }
198 
199 template <typename T,
200           std::enable_if_t<is_uint64_t_convertible<T>(), bool> = false>
201 static auto makeFlagToValueNormalizer(T Value) {
202   return makeFlagToValueNormalizer(uint64_t(Value));
203 }
204 
205 static auto makeBooleanOptionNormalizer(bool Value, bool OtherValue,
206                                         OptSpecifier OtherOpt) {
207   return [Value, OtherValue, OtherOpt](OptSpecifier Opt, unsigned,
208                                        const ArgList &Args,
209                                        DiagnosticsEngine &) -> Optional<bool> {
210     if (const Arg *A = Args.getLastArg(Opt, OtherOpt)) {
211       return A->getOption().matches(Opt) ? Value : OtherValue;
212     }
213     return None;
214   };
215 }
216 
217 static auto makeBooleanOptionDenormalizer(bool Value) {
218   return [Value](SmallVectorImpl<const char *> &Args, const char *Spelling,
219                  CompilerInvocation::StringAllocator, Option::OptionClass,
220                  unsigned, bool KeyPath) {
221     if (KeyPath == Value)
222       Args.push_back(Spelling);
223   };
224 }
225 
226 static void denormalizeStringImpl(SmallVectorImpl<const char *> &Args,
227                                   const char *Spelling,
228                                   CompilerInvocation::StringAllocator SA,
229                                   Option::OptionClass OptClass, unsigned,
230                                   const Twine &Value) {
231   switch (OptClass) {
232   case Option::SeparateClass:
233   case Option::JoinedOrSeparateClass:
234   case Option::JoinedAndSeparateClass:
235     Args.push_back(Spelling);
236     Args.push_back(SA(Value));
237     break;
238   case Option::JoinedClass:
239   case Option::CommaJoinedClass:
240     Args.push_back(SA(Twine(Spelling) + Value));
241     break;
242   default:
243     llvm_unreachable("Cannot denormalize an option with option class "
244                      "incompatible with string denormalization.");
245   }
246 }
247 
248 template <typename T>
249 static void
250 denormalizeString(SmallVectorImpl<const char *> &Args, const char *Spelling,
251                   CompilerInvocation::StringAllocator SA,
252                   Option::OptionClass OptClass, unsigned TableIndex, T Value) {
253   denormalizeStringImpl(Args, Spelling, SA, OptClass, TableIndex, Twine(Value));
254 }
255 
256 static Optional<SimpleEnumValue>
257 findValueTableByName(const SimpleEnumValueTable &Table, StringRef Name) {
258   for (int I = 0, E = Table.Size; I != E; ++I)
259     if (Name == Table.Table[I].Name)
260       return Table.Table[I];
261 
262   return None;
263 }
264 
265 static Optional<SimpleEnumValue>
266 findValueTableByValue(const SimpleEnumValueTable &Table, unsigned Value) {
267   for (int I = 0, E = Table.Size; I != E; ++I)
268     if (Value == Table.Table[I].Value)
269       return Table.Table[I];
270 
271   return None;
272 }
273 
274 static llvm::Optional<unsigned> normalizeSimpleEnum(OptSpecifier Opt,
275                                                     unsigned TableIndex,
276                                                     const ArgList &Args,
277                                                     DiagnosticsEngine &Diags) {
278   assert(TableIndex < SimpleEnumValueTablesSize);
279   const SimpleEnumValueTable &Table = SimpleEnumValueTables[TableIndex];
280 
281   auto *Arg = Args.getLastArg(Opt);
282   if (!Arg)
283     return None;
284 
285   StringRef ArgValue = Arg->getValue();
286   if (auto MaybeEnumVal = findValueTableByName(Table, ArgValue))
287     return MaybeEnumVal->Value;
288 
289   Diags.Report(diag::err_drv_invalid_value)
290       << Arg->getAsString(Args) << ArgValue;
291   return None;
292 }
293 
294 static void denormalizeSimpleEnumImpl(SmallVectorImpl<const char *> &Args,
295                                       const char *Spelling,
296                                       CompilerInvocation::StringAllocator SA,
297                                       Option::OptionClass OptClass,
298                                       unsigned TableIndex, unsigned Value) {
299   assert(TableIndex < SimpleEnumValueTablesSize);
300   const SimpleEnumValueTable &Table = SimpleEnumValueTables[TableIndex];
301   if (auto MaybeEnumVal = findValueTableByValue(Table, Value)) {
302     denormalizeString(Args, Spelling, SA, OptClass, TableIndex,
303                       MaybeEnumVal->Name);
304   } else {
305     llvm_unreachable("The simple enum value was not correctly defined in "
306                      "the tablegen option description");
307   }
308 }
309 
310 template <typename T>
311 static void denormalizeSimpleEnum(SmallVectorImpl<const char *> &Args,
312                                   const char *Spelling,
313                                   CompilerInvocation::StringAllocator SA,
314                                   Option::OptionClass OptClass,
315                                   unsigned TableIndex, T Value) {
316   return denormalizeSimpleEnumImpl(Args, Spelling, SA, OptClass, TableIndex,
317                                    static_cast<unsigned>(Value));
318 }
319 
320 static Optional<std::string> normalizeString(OptSpecifier Opt, int TableIndex,
321                                              const ArgList &Args,
322                                              DiagnosticsEngine &Diags) {
323   auto *Arg = Args.getLastArg(Opt);
324   if (!Arg)
325     return None;
326   return std::string(Arg->getValue());
327 }
328 
329 template <typename IntTy>
330 static Optional<IntTy> normalizeStringIntegral(OptSpecifier Opt, int,
331                                                const ArgList &Args,
332                                                DiagnosticsEngine &Diags) {
333   auto *Arg = Args.getLastArg(Opt);
334   if (!Arg)
335     return None;
336   IntTy Res;
337   if (StringRef(Arg->getValue()).getAsInteger(0, Res)) {
338     Diags.Report(diag::err_drv_invalid_int_value)
339         << Arg->getAsString(Args) << Arg->getValue();
340     return None;
341   }
342   return Res;
343 }
344 
345 static Optional<std::vector<std::string>>
346 normalizeStringVector(OptSpecifier Opt, int, const ArgList &Args,
347                       DiagnosticsEngine &) {
348   return Args.getAllArgValues(Opt);
349 }
350 
351 static void denormalizeStringVector(SmallVectorImpl<const char *> &Args,
352                                     const char *Spelling,
353                                     CompilerInvocation::StringAllocator SA,
354                                     Option::OptionClass OptClass,
355                                     unsigned TableIndex,
356                                     const std::vector<std::string> &Values) {
357   switch (OptClass) {
358   case Option::CommaJoinedClass: {
359     std::string CommaJoinedValue;
360     if (!Values.empty()) {
361       CommaJoinedValue.append(Values.front());
362       for (const std::string &Value : llvm::drop_begin(Values, 1)) {
363         CommaJoinedValue.append(",");
364         CommaJoinedValue.append(Value);
365       }
366     }
367     denormalizeString(Args, Spelling, SA, Option::OptionClass::JoinedClass,
368                       TableIndex, CommaJoinedValue);
369     break;
370   }
371   case Option::JoinedClass:
372   case Option::SeparateClass:
373   case Option::JoinedOrSeparateClass:
374     for (const std::string &Value : Values)
375       denormalizeString(Args, Spelling, SA, OptClass, TableIndex, Value);
376     break;
377   default:
378     llvm_unreachable("Cannot denormalize an option with option class "
379                      "incompatible with string vector denormalization.");
380   }
381 }
382 
383 static Optional<std::string> normalizeTriple(OptSpecifier Opt, int TableIndex,
384                                              const ArgList &Args,
385                                              DiagnosticsEngine &Diags) {
386   auto *Arg = Args.getLastArg(Opt);
387   if (!Arg)
388     return None;
389   return llvm::Triple::normalize(Arg->getValue());
390 }
391 
392 template <typename T, typename U>
393 static T mergeForwardValue(T KeyPath, U Value) {
394   return static_cast<T>(Value);
395 }
396 
397 template <typename T, typename U> static T mergeMaskValue(T KeyPath, U Value) {
398   return KeyPath | Value;
399 }
400 
401 template <typename T> static T extractForwardValue(T KeyPath) {
402   return KeyPath;
403 }
404 
405 template <typename T, typename U, U Value>
406 static T extractMaskValue(T KeyPath) {
407   return ((KeyPath & Value) == Value) ? static_cast<T>(Value) : T();
408 }
409 
410 #define PARSE_OPTION_WITH_MARSHALLING(                                         \
411     ARGS, DIAGS, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,       \
412     IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)             \
413   if ((FLAGS)&options::CC1Option) {                                            \
414     KEYPATH = MERGER(KEYPATH, DEFAULT_VALUE);                                  \
415     if (IMPLIED_CHECK)                                                         \
416       KEYPATH = MERGER(KEYPATH, IMPLIED_VALUE);                                \
417     if (SHOULD_PARSE)                                                          \
418       if (auto MaybeValue = NORMALIZER(OPT_##ID, TABLE_INDEX, ARGS, DIAGS))    \
419         KEYPATH =                                                              \
420             MERGER(KEYPATH, static_cast<decltype(KEYPATH)>(*MaybeValue));      \
421   }
422 
423 // Capture the extracted value as a lambda argument to avoid potential issues
424 // with lifetime extension of the reference.
425 #define GENERATE_OPTION_WITH_MARSHALLING(                                      \
426     ARGS, STRING_ALLOCATOR, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH,       \
427     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR,      \
428     TABLE_INDEX)                                                               \
429   if ((FLAGS)&options::CC1Option) {                                            \
430     [&](const auto &Extracted) {                                               \
431       if (ALWAYS_EMIT ||                                                       \
432           (Extracted !=                                                        \
433            static_cast<decltype(KEYPATH)>((IMPLIED_CHECK) ? (IMPLIED_VALUE)    \
434                                                           : (DEFAULT_VALUE)))) \
435         DENORMALIZER(ARGS, SPELLING, STRING_ALLOCATOR, Option::KIND##Class,    \
436                      TABLE_INDEX, Extracted);                                  \
437     }(EXTRACTOR(KEYPATH));                                                     \
438   }
439 
440 static const StringRef GetInputKindName(InputKind IK);
441 
442 static bool FixupInvocation(CompilerInvocation &Invocation,
443                             DiagnosticsEngine &Diags, const ArgList &Args,
444                             InputKind IK) {
445   unsigned NumErrorsBefore = Diags.getNumErrors();
446 
447   LangOptions &LangOpts = *Invocation.getLangOpts();
448   CodeGenOptions &CodeGenOpts = Invocation.getCodeGenOpts();
449   TargetOptions &TargetOpts = Invocation.getTargetOpts();
450   FrontendOptions &FrontendOpts = Invocation.getFrontendOpts();
451   CodeGenOpts.XRayInstrumentFunctions = LangOpts.XRayInstrument;
452   CodeGenOpts.XRayAlwaysEmitCustomEvents = LangOpts.XRayAlwaysEmitCustomEvents;
453   CodeGenOpts.XRayAlwaysEmitTypedEvents = LangOpts.XRayAlwaysEmitTypedEvents;
454   CodeGenOpts.DisableFree = FrontendOpts.DisableFree;
455   FrontendOpts.GenerateGlobalModuleIndex = FrontendOpts.UseGlobalModuleIndex;
456 
457   LangOpts.ForceEmitVTables = CodeGenOpts.ForceEmitVTables;
458   LangOpts.SpeculativeLoadHardening = CodeGenOpts.SpeculativeLoadHardening;
459   LangOpts.CurrentModule = LangOpts.ModuleName;
460 
461   llvm::Triple T(TargetOpts.Triple);
462   llvm::Triple::ArchType Arch = T.getArch();
463 
464   CodeGenOpts.CodeModel = TargetOpts.CodeModel;
465 
466   if (LangOpts.getExceptionHandling() != llvm::ExceptionHandling::None &&
467       T.isWindowsMSVCEnvironment())
468     Diags.Report(diag::err_fe_invalid_exception_model)
469         << static_cast<unsigned>(LangOpts.getExceptionHandling()) << T.str();
470 
471   if (LangOpts.AppleKext && !LangOpts.CPlusPlus)
472     Diags.Report(diag::warn_c_kext);
473 
474   if (Args.hasArg(OPT_fconcepts_ts))
475     Diags.Report(diag::warn_fe_concepts_ts_flag);
476 
477   if (LangOpts.NewAlignOverride &&
478       !llvm::isPowerOf2_32(LangOpts.NewAlignOverride)) {
479     Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
480     Diags.Report(diag::err_fe_invalid_alignment)
481         << A->getAsString(Args) << A->getValue();
482     LangOpts.NewAlignOverride = 0;
483   }
484 
485   // Prevent the user from specifying both -fsycl-is-device and -fsycl-is-host.
486   if (LangOpts.SYCLIsDevice && LangOpts.SYCLIsHost)
487     Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fsycl-is-device"
488                                                           << "-fsycl-is-host";
489 
490   if (Args.hasArg(OPT_fgnu89_inline) && LangOpts.CPlusPlus)
491     Diags.Report(diag::err_drv_argument_not_allowed_with)
492         << "-fgnu89-inline" << GetInputKindName(IK);
493 
494   if (Args.hasArg(OPT_fgpu_allow_device_init) && !LangOpts.HIP)
495     Diags.Report(diag::warn_ignored_hip_only_option)
496         << Args.getLastArg(OPT_fgpu_allow_device_init)->getAsString(Args);
497 
498   if (Args.hasArg(OPT_gpu_max_threads_per_block_EQ) && !LangOpts.HIP)
499     Diags.Report(diag::warn_ignored_hip_only_option)
500         << Args.getLastArg(OPT_gpu_max_threads_per_block_EQ)->getAsString(Args);
501 
502   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
503   // This option should be deprecated for CL > 1.0 because
504   // this option was added for compatibility with OpenCL 1.0.
505   if (Args.getLastArg(OPT_cl_strict_aliasing) && LangOpts.OpenCLVersion > 100)
506     Diags.Report(diag::warn_option_invalid_ocl_version)
507         << LangOpts.getOpenCLVersionTuple().getAsString()
508         << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
509 
510   if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
511     auto DefaultCC = LangOpts.getDefaultCallingConv();
512 
513     bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
514                       DefaultCC == LangOptions::DCC_StdCall) &&
515                      Arch != llvm::Triple::x86;
516     emitError |= (DefaultCC == LangOptions::DCC_VectorCall ||
517                   DefaultCC == LangOptions::DCC_RegCall) &&
518                  !T.isX86();
519     if (emitError)
520       Diags.Report(diag::err_drv_argument_not_allowed_with)
521           << A->getSpelling() << T.getTriple();
522   }
523 
524   if (!CodeGenOpts.ProfileRemappingFile.empty() && CodeGenOpts.LegacyPassManager)
525     Diags.Report(diag::err_drv_argument_only_allowed_with)
526         << Args.getLastArg(OPT_fprofile_remapping_file_EQ)->getAsString(Args)
527         << "-fno-legacy-pass-manager";
528 
529   return Diags.getNumErrors() == NumErrorsBefore;
530 }
531 
532 //===----------------------------------------------------------------------===//
533 // Deserialization (from args)
534 //===----------------------------------------------------------------------===//
535 
536 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
537                                      DiagnosticsEngine &Diags) {
538   unsigned DefaultOpt = llvm::CodeGenOpt::None;
539   if ((IK.getLanguage() == Language::OpenCL ||
540        IK.getLanguage() == Language::OpenCLCXX) &&
541       !Args.hasArg(OPT_cl_opt_disable))
542     DefaultOpt = llvm::CodeGenOpt::Default;
543 
544   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
545     if (A->getOption().matches(options::OPT_O0))
546       return llvm::CodeGenOpt::None;
547 
548     if (A->getOption().matches(options::OPT_Ofast))
549       return llvm::CodeGenOpt::Aggressive;
550 
551     assert(A->getOption().matches(options::OPT_O));
552 
553     StringRef S(A->getValue());
554     if (S == "s" || S == "z")
555       return llvm::CodeGenOpt::Default;
556 
557     if (S == "g")
558       return llvm::CodeGenOpt::Less;
559 
560     return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
561   }
562 
563   return DefaultOpt;
564 }
565 
566 static unsigned getOptimizationLevelSize(ArgList &Args) {
567   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
568     if (A->getOption().matches(options::OPT_O)) {
569       switch (A->getValue()[0]) {
570       default:
571         return 0;
572       case 's':
573         return 1;
574       case 'z':
575         return 2;
576       }
577     }
578   }
579   return 0;
580 }
581 
582 static void GenerateArg(SmallVectorImpl<const char *> &Args,
583                         llvm::opt::OptSpecifier OptSpecifier,
584                         CompilerInvocation::StringAllocator SA) {
585   Option Opt = getDriverOptTable().getOption(OptSpecifier);
586   denormalizeSimpleFlag(Args, SA(Opt.getPrefix() + Opt.getName()), SA,
587                         Option::OptionClass::FlagClass, 0);
588 }
589 
590 static void GenerateArg(SmallVectorImpl<const char *> &Args,
591                         llvm::opt::OptSpecifier OptSpecifier,
592                         const Twine &Value,
593                         CompilerInvocation::StringAllocator SA) {
594   Option Opt = getDriverOptTable().getOption(OptSpecifier);
595   denormalizeString(Args, SA(Opt.getPrefix() + Opt.getName()), SA,
596                     Opt.getKind(), 0, Value);
597 }
598 
599 // Parse command line arguments into CompilerInvocation.
600 using ParseFn =
601     llvm::function_ref<bool(CompilerInvocation &, ArrayRef<const char *>,
602                             DiagnosticsEngine &, const char *)>;
603 
604 // Generate command line arguments from CompilerInvocation.
605 using GenerateFn = llvm::function_ref<void(
606     CompilerInvocation &, SmallVectorImpl<const char *> &,
607     CompilerInvocation::StringAllocator)>;
608 
609 // May perform round-trip of command line arguments. By default, the round-trip
610 // is enabled if CLANG_ROUND_TRIP_CC1_ARGS was defined during build. This can be
611 // overwritten at run-time via the "-round-trip-args" and "-no-round-trip-args"
612 // command line flags.
613 // During round-trip, the command line arguments are parsed into a dummy
614 // instance of CompilerInvocation which is used to generate the command line
615 // arguments again. The real CompilerInvocation instance is then created by
616 // parsing the generated arguments, not the original ones.
617 static bool RoundTrip(ParseFn Parse, GenerateFn Generate,
618                       CompilerInvocation &RealInvocation,
619                       CompilerInvocation &DummyInvocation,
620                       ArrayRef<const char *> CommandLineArgs,
621                       DiagnosticsEngine &Diags, const char *Argv0) {
622   // FIXME: Switch to '#ifndef NDEBUG' when possible.
623 #ifdef CLANG_ROUND_TRIP_CC1_ARGS
624   bool DoRoundTripDefault = true;
625 #else
626   bool DoRoundTripDefault = false;
627 #endif
628 
629   bool DoRoundTrip = DoRoundTripDefault;
630   for (const auto *Arg : CommandLineArgs) {
631     if (Arg == StringRef("-round-trip-args"))
632       DoRoundTrip = true;
633     if (Arg == StringRef("-no-round-trip-args"))
634       DoRoundTrip = false;
635   }
636 
637   // If round-trip was not requested, simply run the parser with the real
638   // invocation diagnostics.
639   if (!DoRoundTrip)
640     return Parse(RealInvocation, CommandLineArgs, Diags, Argv0);
641 
642   // Serializes quoted (and potentially escaped) arguments.
643   auto SerializeArgs = [](ArrayRef<const char *> Args) {
644     std::string Buffer;
645     llvm::raw_string_ostream OS(Buffer);
646     for (const char *Arg : Args) {
647       llvm::sys::printArg(OS, Arg, /*Quote=*/true);
648       OS << ' ';
649     }
650     OS.flush();
651     return Buffer;
652   };
653 
654   // Setup a dummy DiagnosticsEngine.
655   DiagnosticsEngine DummyDiags(new DiagnosticIDs(), new DiagnosticOptions());
656   DummyDiags.setClient(new TextDiagnosticBuffer());
657 
658   // Run the first parse on the original arguments with the dummy invocation and
659   // diagnostics.
660   if (!Parse(DummyInvocation, CommandLineArgs, DummyDiags, Argv0) ||
661       DummyDiags.getNumWarnings() != 0) {
662     // If the first parse did not succeed, it must be user mistake (invalid
663     // command line arguments). We won't be able to generate arguments that
664     // would reproduce the same result. Let's fail again with the real
665     // invocation and diagnostics, so all side-effects of parsing are visible.
666     unsigned NumWarningsBefore = Diags.getNumWarnings();
667     auto Success = Parse(RealInvocation, CommandLineArgs, Diags, Argv0);
668     if (!Success || Diags.getNumWarnings() != NumWarningsBefore)
669       return Success;
670 
671     // Parse with original options and diagnostics succeeded even though it
672     // shouldn't have. Something is off.
673     Diags.Report(diag::err_cc1_round_trip_fail_then_ok);
674     Diags.Report(diag::note_cc1_round_trip_original)
675         << SerializeArgs(CommandLineArgs);
676     return false;
677   }
678 
679   // Setup string allocator.
680   llvm::BumpPtrAllocator Alloc;
681   llvm::StringSaver StringPool(Alloc);
682   auto SA = [&StringPool](const Twine &Arg) {
683     return StringPool.save(Arg).data();
684   };
685 
686   // Generate arguments from the dummy invocation. If Generate is the
687   // inverse of Parse, the newly generated arguments must have the same
688   // semantics as the original.
689   SmallVector<const char *> GeneratedArgs1;
690   Generate(DummyInvocation, GeneratedArgs1, SA);
691 
692   // Run the second parse, now on the generated arguments, and with the real
693   // invocation and diagnostics. The result is what we will end up using for the
694   // rest of compilation, so if Generate is not inverse of Parse, something down
695   // the line will break.
696   bool Success2 = Parse(RealInvocation, GeneratedArgs1, Diags, Argv0);
697 
698   // The first parse on original arguments succeeded, but second parse of
699   // generated arguments failed. Something must be wrong with the generator.
700   if (!Success2) {
701     Diags.Report(diag::err_cc1_round_trip_ok_then_fail);
702     Diags.Report(diag::note_cc1_round_trip_generated)
703         << 1 << SerializeArgs(GeneratedArgs1);
704     return false;
705   }
706 
707   // Generate arguments again, this time from the options we will end up using
708   // for the rest of the compilation.
709   SmallVector<const char *> GeneratedArgs2;
710   Generate(RealInvocation, GeneratedArgs2, SA);
711 
712   // Compares two lists of generated arguments.
713   auto Equal = [](const ArrayRef<const char *> A,
714                   const ArrayRef<const char *> B) {
715     return std::equal(A.begin(), A.end(), B.begin(), B.end(),
716                       [](const char *AElem, const char *BElem) {
717                         return StringRef(AElem) == StringRef(BElem);
718                       });
719   };
720 
721   // If we generated different arguments from what we assume are two
722   // semantically equivalent CompilerInvocations, the Generate function may
723   // be non-deterministic.
724   if (!Equal(GeneratedArgs1, GeneratedArgs2)) {
725     Diags.Report(diag::err_cc1_round_trip_mismatch);
726     Diags.Report(diag::note_cc1_round_trip_generated)
727         << 1 << SerializeArgs(GeneratedArgs1);
728     Diags.Report(diag::note_cc1_round_trip_generated)
729         << 2 << SerializeArgs(GeneratedArgs2);
730     return false;
731   }
732 
733   Diags.Report(diag::remark_cc1_round_trip_generated)
734       << 1 << SerializeArgs(GeneratedArgs1);
735   Diags.Report(diag::remark_cc1_round_trip_generated)
736       << 2 << SerializeArgs(GeneratedArgs2);
737 
738   return Success2;
739 }
740 
741 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
742                               OptSpecifier GroupWithValue,
743                               std::vector<std::string> &Diagnostics) {
744   for (auto *A : Args.filtered(Group)) {
745     if (A->getOption().getKind() == Option::FlagClass) {
746       // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
747       // its name (minus the "W" or "R" at the beginning) to the diagnostics.
748       Diagnostics.push_back(
749           std::string(A->getOption().getName().drop_front(1)));
750     } else if (A->getOption().matches(GroupWithValue)) {
751       // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic
752       // group. Add only the group name to the diagnostics.
753       Diagnostics.push_back(
754           std::string(A->getOption().getName().drop_front(1).rtrim("=-")));
755     } else {
756       // Otherwise, add its value (for OPT_W_Joined and similar).
757       Diagnostics.push_back(A->getValue());
758     }
759   }
760 }
761 
762 // Parse the Static Analyzer configuration. If \p Diags is set to nullptr,
763 // it won't verify the input.
764 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
765                                  DiagnosticsEngine *Diags);
766 
767 static void getAllNoBuiltinFuncValues(ArgList &Args,
768                                       std::vector<std::string> &Funcs) {
769   std::vector<std::string> Values = Args.getAllArgValues(OPT_fno_builtin_);
770   auto BuiltinEnd = llvm::partition(Values, [](const std::string FuncName) {
771     return Builtin::Context::isBuiltinFunc(FuncName);
772   });
773   Funcs.insert(Funcs.end(), Values.begin(), BuiltinEnd);
774 }
775 
776 static void GenerateAnalyzerArgs(AnalyzerOptions &Opts,
777                                  SmallVectorImpl<const char *> &Args,
778                                  CompilerInvocation::StringAllocator SA) {
779   const AnalyzerOptions *AnalyzerOpts = &Opts;
780 
781 #define ANALYZER_OPTION_WITH_MARSHALLING(                                      \
782     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
783     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
784     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
785     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
786   GENERATE_OPTION_WITH_MARSHALLING(                                            \
787       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
788       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
789 #include "clang/Driver/Options.inc"
790 #undef ANALYZER_OPTION_WITH_MARSHALLING
791 
792   if (Opts.AnalysisStoreOpt != RegionStoreModel) {
793     switch (Opts.AnalysisStoreOpt) {
794 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN)                           \
795   case NAME##Model:                                                            \
796     GenerateArg(Args, OPT_analyzer_store, CMDFLAG, SA);                        \
797     break;
798 #include "clang/StaticAnalyzer/Core/Analyses.def"
799     default:
800       llvm_unreachable("Tried to generate unknown analysis store.");
801     }
802   }
803 
804   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
805     switch (Opts.AnalysisConstraintsOpt) {
806 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN)                     \
807   case NAME##Model:                                                            \
808     GenerateArg(Args, OPT_analyzer_constraints, CMDFLAG, SA);                  \
809     break;
810 #include "clang/StaticAnalyzer/Core/Analyses.def"
811     default:
812       llvm_unreachable("Tried to generate unknown analysis constraint.");
813     }
814   }
815 
816   if (Opts.AnalysisDiagOpt != PD_HTML) {
817     switch (Opts.AnalysisDiagOpt) {
818 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN)                     \
819   case PD_##NAME:                                                              \
820     GenerateArg(Args, OPT_analyzer_output, CMDFLAG, SA);                       \
821     break;
822 #include "clang/StaticAnalyzer/Core/Analyses.def"
823     default:
824       llvm_unreachable("Tried to generate unknown analysis diagnostic client.");
825     }
826   }
827 
828   if (Opts.AnalysisPurgeOpt != PurgeStmt) {
829     switch (Opts.AnalysisPurgeOpt) {
830 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC)                                    \
831   case NAME:                                                                   \
832     GenerateArg(Args, OPT_analyzer_purge, CMDFLAG, SA);                        \
833     break;
834 #include "clang/StaticAnalyzer/Core/Analyses.def"
835     default:
836       llvm_unreachable("Tried to generate unknown analysis purge mode.");
837     }
838   }
839 
840   if (Opts.InliningMode != NoRedundancy) {
841     switch (Opts.InliningMode) {
842 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC)                            \
843   case NAME:                                                                   \
844     GenerateArg(Args, OPT_analyzer_inlining_mode, CMDFLAG, SA);                \
845     break;
846 #include "clang/StaticAnalyzer/Core/Analyses.def"
847     default:
848       llvm_unreachable("Tried to generate unknown analysis inlining mode.");
849     }
850   }
851 
852   for (const auto &CP : Opts.CheckersAndPackages) {
853     OptSpecifier Opt =
854         CP.second ? OPT_analyzer_checker : OPT_analyzer_disable_checker;
855     GenerateArg(Args, Opt, CP.first, SA);
856   }
857 
858   AnalyzerOptions ConfigOpts;
859   parseAnalyzerConfigs(ConfigOpts, nullptr);
860 
861   for (const auto &C : Opts.Config) {
862     // Don't generate anything that came from parseAnalyzerConfigs. It would be
863     // redundant and may not be valid on the command line.
864     auto Entry = ConfigOpts.Config.find(C.getKey());
865     if (Entry != ConfigOpts.Config.end() && Entry->getValue() == C.getValue())
866       continue;
867 
868     GenerateArg(Args, OPT_analyzer_config, C.getKey() + "=" + C.getValue(), SA);
869   }
870 
871   // Nothing to generate for FullCompilerInvocation.
872 }
873 
874 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
875                               DiagnosticsEngine &Diags) {
876   unsigned NumErrorsBefore = Diags.getNumErrors();
877 
878   AnalyzerOptions *AnalyzerOpts = &Opts;
879 
880 #define ANALYZER_OPTION_WITH_MARSHALLING(                                      \
881     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
882     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
883     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
884     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
885   PARSE_OPTION_WITH_MARSHALLING(                                               \
886       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
887       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
888 #include "clang/Driver/Options.inc"
889 #undef ANALYZER_OPTION_WITH_MARSHALLING
890 
891   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
892     StringRef Name = A->getValue();
893     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
894 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
895       .Case(CMDFLAG, NAME##Model)
896 #include "clang/StaticAnalyzer/Core/Analyses.def"
897       .Default(NumStores);
898     if (Value == NumStores) {
899       Diags.Report(diag::err_drv_invalid_value)
900         << A->getAsString(Args) << Name;
901     } else {
902       Opts.AnalysisStoreOpt = Value;
903     }
904   }
905 
906   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
907     StringRef Name = A->getValue();
908     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
909 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
910       .Case(CMDFLAG, NAME##Model)
911 #include "clang/StaticAnalyzer/Core/Analyses.def"
912       .Default(NumConstraints);
913     if (Value == NumConstraints) {
914       Diags.Report(diag::err_drv_invalid_value)
915         << A->getAsString(Args) << Name;
916     } else {
917       Opts.AnalysisConstraintsOpt = Value;
918     }
919   }
920 
921   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
922     StringRef Name = A->getValue();
923     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
924 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
925       .Case(CMDFLAG, PD_##NAME)
926 #include "clang/StaticAnalyzer/Core/Analyses.def"
927       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
928     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
929       Diags.Report(diag::err_drv_invalid_value)
930         << A->getAsString(Args) << Name;
931     } else {
932       Opts.AnalysisDiagOpt = Value;
933     }
934   }
935 
936   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
937     StringRef Name = A->getValue();
938     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
939 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
940       .Case(CMDFLAG, NAME)
941 #include "clang/StaticAnalyzer/Core/Analyses.def"
942       .Default(NumPurgeModes);
943     if (Value == NumPurgeModes) {
944       Diags.Report(diag::err_drv_invalid_value)
945         << A->getAsString(Args) << Name;
946     } else {
947       Opts.AnalysisPurgeOpt = Value;
948     }
949   }
950 
951   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
952     StringRef Name = A->getValue();
953     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
954 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
955       .Case(CMDFLAG, NAME)
956 #include "clang/StaticAnalyzer/Core/Analyses.def"
957       .Default(NumInliningModes);
958     if (Value == NumInliningModes) {
959       Diags.Report(diag::err_drv_invalid_value)
960         << A->getAsString(Args) << Name;
961     } else {
962       Opts.InliningMode = Value;
963     }
964   }
965 
966   Opts.CheckersAndPackages.clear();
967   for (const Arg *A :
968        Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
969     A->claim();
970     bool IsEnabled = A->getOption().getID() == OPT_analyzer_checker;
971     // We can have a list of comma separated checker names, e.g:
972     // '-analyzer-checker=cocoa,unix'
973     StringRef CheckerAndPackageList = A->getValue();
974     SmallVector<StringRef, 16> CheckersAndPackages;
975     CheckerAndPackageList.split(CheckersAndPackages, ",");
976     for (const StringRef &CheckerOrPackage : CheckersAndPackages)
977       Opts.CheckersAndPackages.emplace_back(std::string(CheckerOrPackage),
978                                             IsEnabled);
979   }
980 
981   // Go through the analyzer configuration options.
982   for (const auto *A : Args.filtered(OPT_analyzer_config)) {
983 
984     // We can have a list of comma separated config names, e.g:
985     // '-analyzer-config key1=val1,key2=val2'
986     StringRef configList = A->getValue();
987     SmallVector<StringRef, 4> configVals;
988     configList.split(configVals, ",");
989     for (const auto &configVal : configVals) {
990       StringRef key, val;
991       std::tie(key, val) = configVal.split("=");
992       if (val.empty()) {
993         Diags.Report(SourceLocation(),
994                      diag::err_analyzer_config_no_value) << configVal;
995         break;
996       }
997       if (val.find('=') != StringRef::npos) {
998         Diags.Report(SourceLocation(),
999                      diag::err_analyzer_config_multiple_values)
1000           << configVal;
1001         break;
1002       }
1003 
1004       // TODO: Check checker options too, possibly in CheckerRegistry.
1005       // Leave unknown non-checker configs unclaimed.
1006       if (!key.contains(":") && Opts.isUnknownAnalyzerConfig(key)) {
1007         if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
1008           Diags.Report(diag::err_analyzer_config_unknown) << key;
1009         continue;
1010       }
1011 
1012       A->claim();
1013       Opts.Config[key] = std::string(val);
1014     }
1015   }
1016 
1017   if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
1018     parseAnalyzerConfigs(Opts, &Diags);
1019   else
1020     parseAnalyzerConfigs(Opts, nullptr);
1021 
1022   llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
1023   for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
1024     if (i != 0)
1025       os << " ";
1026     os << Args.getArgString(i);
1027   }
1028   os.flush();
1029 
1030   return Diags.getNumErrors() == NumErrorsBefore;
1031 }
1032 
1033 static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
1034                                  StringRef OptionName, StringRef DefaultVal) {
1035   return Config.insert({OptionName, std::string(DefaultVal)}).first->second;
1036 }
1037 
1038 static void initOption(AnalyzerOptions::ConfigTable &Config,
1039                        DiagnosticsEngine *Diags,
1040                        StringRef &OptionField, StringRef Name,
1041                        StringRef DefaultVal) {
1042   // String options may be known to invalid (e.g. if the expected string is a
1043   // file name, but the file does not exist), those will have to be checked in
1044   // parseConfigs.
1045   OptionField = getStringOption(Config, Name, DefaultVal);
1046 }
1047 
1048 static void initOption(AnalyzerOptions::ConfigTable &Config,
1049                        DiagnosticsEngine *Diags,
1050                        bool &OptionField, StringRef Name, bool DefaultVal) {
1051   auto PossiblyInvalidVal = llvm::StringSwitch<Optional<bool>>(
1052                  getStringOption(Config, Name, (DefaultVal ? "true" : "false")))
1053       .Case("true", true)
1054       .Case("false", false)
1055       .Default(None);
1056 
1057   if (!PossiblyInvalidVal) {
1058     if (Diags)
1059       Diags->Report(diag::err_analyzer_config_invalid_input)
1060         << Name << "a boolean";
1061     else
1062       OptionField = DefaultVal;
1063   } else
1064     OptionField = PossiblyInvalidVal.getValue();
1065 }
1066 
1067 static void initOption(AnalyzerOptions::ConfigTable &Config,
1068                        DiagnosticsEngine *Diags,
1069                        unsigned &OptionField, StringRef Name,
1070                        unsigned DefaultVal) {
1071 
1072   OptionField = DefaultVal;
1073   bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
1074                      .getAsInteger(0, OptionField);
1075   if (Diags && HasFailed)
1076     Diags->Report(diag::err_analyzer_config_invalid_input)
1077       << Name << "an unsigned";
1078 }
1079 
1080 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
1081                                  DiagnosticsEngine *Diags) {
1082   // TODO: There's no need to store the entire configtable, it'd be plenty
1083   // enough tostore checker options.
1084 
1085 #define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL)                \
1086   initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);
1087 
1088 #define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC,        \
1089                                            SHALLOW_VAL, DEEP_VAL)              \
1090   switch (AnOpts.getUserMode()) {                                              \
1091   case UMK_Shallow:                                                            \
1092     initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, SHALLOW_VAL);       \
1093     break;                                                                     \
1094   case UMK_Deep:                                                               \
1095     initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEEP_VAL);          \
1096     break;                                                                     \
1097   }                                                                            \
1098 
1099 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
1100 #undef ANALYZER_OPTION
1101 #undef ANALYZER_OPTION_DEPENDS_ON_USER_MODE
1102 
1103   // At this point, AnalyzerOptions is configured. Let's validate some options.
1104 
1105   // FIXME: Here we try to validate the silenced checkers or packages are valid.
1106   // The current approach only validates the registered checkers which does not
1107   // contain the runtime enabled checkers and optimally we would validate both.
1108   if (!AnOpts.RawSilencedCheckersAndPackages.empty()) {
1109     std::vector<StringRef> Checkers =
1110         AnOpts.getRegisteredCheckers(/*IncludeExperimental=*/true);
1111     std::vector<StringRef> Packages =
1112         AnOpts.getRegisteredPackages(/*IncludeExperimental=*/true);
1113 
1114     SmallVector<StringRef, 16> CheckersAndPackages;
1115     AnOpts.RawSilencedCheckersAndPackages.split(CheckersAndPackages, ";");
1116 
1117     for (const StringRef &CheckerOrPackage : CheckersAndPackages) {
1118       if (Diags) {
1119         bool IsChecker = CheckerOrPackage.contains('.');
1120         bool IsValidName =
1121             IsChecker
1122                 ? llvm::find(Checkers, CheckerOrPackage) != Checkers.end()
1123                 : llvm::find(Packages, CheckerOrPackage) != Packages.end();
1124 
1125         if (!IsValidName)
1126           Diags->Report(diag::err_unknown_analyzer_checker_or_package)
1127               << CheckerOrPackage;
1128       }
1129 
1130       AnOpts.SilencedCheckersAndPackages.emplace_back(CheckerOrPackage);
1131     }
1132   }
1133 
1134   if (!Diags)
1135     return;
1136 
1137   if (AnOpts.ShouldTrackConditionsDebug && !AnOpts.ShouldTrackConditions)
1138     Diags->Report(diag::err_analyzer_config_invalid_input)
1139         << "track-conditions-debug" << "'track-conditions' to also be enabled";
1140 
1141   if (!AnOpts.CTUDir.empty() && !llvm::sys::fs::is_directory(AnOpts.CTUDir))
1142     Diags->Report(diag::err_analyzer_config_invalid_input) << "ctu-dir"
1143                                                            << "a filename";
1144 
1145   if (!AnOpts.ModelPath.empty() &&
1146       !llvm::sys::fs::is_directory(AnOpts.ModelPath))
1147     Diags->Report(diag::err_analyzer_config_invalid_input) << "model-path"
1148                                                            << "a filename";
1149 }
1150 
1151 /// Generate a remark argument. This is an inverse of `ParseOptimizationRemark`.
1152 static void
1153 GenerateOptimizationRemark(SmallVectorImpl<const char *> &Args,
1154                            CompilerInvocation::StringAllocator SA,
1155                            OptSpecifier OptEQ, StringRef Name,
1156                            const CodeGenOptions::OptRemark &Remark) {
1157   if (Remark.hasValidPattern()) {
1158     GenerateArg(Args, OptEQ, Remark.Pattern, SA);
1159   } else if (Remark.Kind == CodeGenOptions::RK_Enabled) {
1160     GenerateArg(Args, OPT_R_Joined, Name, SA);
1161   } else if (Remark.Kind == CodeGenOptions::RK_Disabled) {
1162     GenerateArg(Args, OPT_R_Joined, StringRef("no-") + Name, SA);
1163   }
1164 }
1165 
1166 /// Parse a remark command line argument. It may be missing, disabled/enabled by
1167 /// '-R[no-]group' or specified with a regular expression by '-Rgroup=regexp'.
1168 /// On top of that, it can be disabled/enabled globally by '-R[no-]everything'.
1169 static CodeGenOptions::OptRemark
1170 ParseOptimizationRemark(DiagnosticsEngine &Diags, ArgList &Args,
1171                         OptSpecifier OptEQ, StringRef Name) {
1172   CodeGenOptions::OptRemark Result;
1173 
1174   auto InitializeResultPattern = [&Diags, &Args, &Result](const Arg *A) {
1175     Result.Pattern = A->getValue();
1176 
1177     std::string RegexError;
1178     Result.Regex = std::make_shared<llvm::Regex>(Result.Pattern);
1179     if (!Result.Regex->isValid(RegexError)) {
1180       Diags.Report(diag::err_drv_optimization_remark_pattern)
1181           << RegexError << A->getAsString(Args);
1182       return false;
1183     }
1184 
1185     return true;
1186   };
1187 
1188   for (Arg *A : Args) {
1189     if (A->getOption().matches(OPT_R_Joined)) {
1190       StringRef Value = A->getValue();
1191 
1192       if (Value == Name)
1193         Result.Kind = CodeGenOptions::RK_Enabled;
1194       else if (Value == "everything")
1195         Result.Kind = CodeGenOptions::RK_EnabledEverything;
1196       else if (Value.split('-') == std::make_pair(StringRef("no"), Name))
1197         Result.Kind = CodeGenOptions::RK_Disabled;
1198       else if (Value == "no-everything")
1199         Result.Kind = CodeGenOptions::RK_DisabledEverything;
1200     } else if (A->getOption().matches(OptEQ)) {
1201       Result.Kind = CodeGenOptions::RK_WithPattern;
1202       if (!InitializeResultPattern(A))
1203         return CodeGenOptions::OptRemark();
1204     }
1205   }
1206 
1207   if (Result.Kind == CodeGenOptions::RK_Disabled ||
1208       Result.Kind == CodeGenOptions::RK_DisabledEverything) {
1209     Result.Pattern = "";
1210     Result.Regex = nullptr;
1211   }
1212 
1213   return Result;
1214 }
1215 
1216 static bool parseDiagnosticLevelMask(StringRef FlagName,
1217                                      const std::vector<std::string> &Levels,
1218                                      DiagnosticsEngine &Diags,
1219                                      DiagnosticLevelMask &M) {
1220   bool Success = true;
1221   for (const auto &Level : Levels) {
1222     DiagnosticLevelMask const PM =
1223       llvm::StringSwitch<DiagnosticLevelMask>(Level)
1224         .Case("note",    DiagnosticLevelMask::Note)
1225         .Case("remark",  DiagnosticLevelMask::Remark)
1226         .Case("warning", DiagnosticLevelMask::Warning)
1227         .Case("error",   DiagnosticLevelMask::Error)
1228         .Default(DiagnosticLevelMask::None);
1229     if (PM == DiagnosticLevelMask::None) {
1230       Success = false;
1231       Diags.Report(diag::err_drv_invalid_value) << FlagName << Level;
1232     }
1233     M = M | PM;
1234   }
1235   return Success;
1236 }
1237 
1238 static void parseSanitizerKinds(StringRef FlagName,
1239                                 const std::vector<std::string> &Sanitizers,
1240                                 DiagnosticsEngine &Diags, SanitizerSet &S) {
1241   for (const auto &Sanitizer : Sanitizers) {
1242     SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
1243     if (K == SanitizerMask())
1244       Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
1245     else
1246       S.set(K, true);
1247   }
1248 }
1249 
1250 static SmallVector<StringRef, 4> serializeSanitizerKinds(SanitizerSet S) {
1251   SmallVector<StringRef, 4> Values;
1252   serializeSanitizerSet(S, Values);
1253   return Values;
1254 }
1255 
1256 static void parseXRayInstrumentationBundle(StringRef FlagName, StringRef Bundle,
1257                                            ArgList &Args, DiagnosticsEngine &D,
1258                                            XRayInstrSet &S) {
1259   llvm::SmallVector<StringRef, 2> BundleParts;
1260   llvm::SplitString(Bundle, BundleParts, ",");
1261   for (const auto &B : BundleParts) {
1262     auto Mask = parseXRayInstrValue(B);
1263     if (Mask == XRayInstrKind::None)
1264       if (B != "none")
1265         D.Report(diag::err_drv_invalid_value) << FlagName << Bundle;
1266       else
1267         S.Mask = Mask;
1268     else if (Mask == XRayInstrKind::All)
1269       S.Mask = Mask;
1270     else
1271       S.set(Mask, true);
1272   }
1273 }
1274 
1275 static std::string serializeXRayInstrumentationBundle(const XRayInstrSet &S) {
1276   llvm::SmallVector<StringRef, 2> BundleParts;
1277   serializeXRayInstrValue(S, BundleParts);
1278   std::string Buffer;
1279   llvm::raw_string_ostream OS(Buffer);
1280   llvm::interleave(BundleParts, OS, [&OS](StringRef Part) { OS << Part; }, ",");
1281   return OS.str();
1282 }
1283 
1284 // Set the profile kind using fprofile-instrument-use-path.
1285 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
1286                                   const Twine &ProfileName) {
1287   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
1288   // In error, return silently and let Clang PGOUse report the error message.
1289   if (auto E = ReaderOrErr.takeError()) {
1290     llvm::consumeError(std::move(E));
1291     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
1292     return;
1293   }
1294   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
1295     std::move(ReaderOrErr.get());
1296   if (PGOReader->isIRLevelProfile()) {
1297     if (PGOReader->hasCSIRLevelProfile())
1298       Opts.setProfileUse(CodeGenOptions::ProfileCSIRInstr);
1299     else
1300       Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
1301   } else
1302     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
1303 }
1304 
1305 void CompilerInvocation::GenerateCodeGenArgs(
1306     const CodeGenOptions &Opts, SmallVectorImpl<const char *> &Args,
1307     StringAllocator SA, const llvm::Triple &T, const std::string &OutputFile,
1308     const LangOptions *LangOpts) {
1309   const CodeGenOptions &CodeGenOpts = Opts;
1310 
1311   if (Opts.OptimizationLevel == 0)
1312     GenerateArg(Args, OPT_O0, SA);
1313   else
1314     GenerateArg(Args, OPT_O, Twine(Opts.OptimizationLevel), SA);
1315 
1316 #define CODEGEN_OPTION_WITH_MARSHALLING(                                       \
1317     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1318     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1319     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1320     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1321   GENERATE_OPTION_WITH_MARSHALLING(                                            \
1322       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
1323       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
1324 #include "clang/Driver/Options.inc"
1325 #undef CODEGEN_OPTION_WITH_MARSHALLING
1326 
1327   if (Opts.OptimizationLevel > 0) {
1328     if (Opts.Inlining == CodeGenOptions::NormalInlining)
1329       GenerateArg(Args, OPT_finline_functions, SA);
1330     else if (Opts.Inlining == CodeGenOptions::OnlyHintInlining)
1331       GenerateArg(Args, OPT_finline_hint_functions, SA);
1332     else if (Opts.Inlining == CodeGenOptions::OnlyAlwaysInlining)
1333       GenerateArg(Args, OPT_fno_inline, SA);
1334   }
1335 
1336   if (Opts.DirectAccessExternalData && LangOpts->PICLevel != 0)
1337     GenerateArg(Args, OPT_fdirect_access_external_data, SA);
1338   else if (!Opts.DirectAccessExternalData && LangOpts->PICLevel == 0)
1339     GenerateArg(Args, OPT_fno_direct_access_external_data, SA);
1340 
1341   Optional<StringRef> DebugInfoVal;
1342   switch (Opts.DebugInfo) {
1343   case codegenoptions::DebugLineTablesOnly:
1344     DebugInfoVal = "line-tables-only";
1345     break;
1346   case codegenoptions::DebugDirectivesOnly:
1347     DebugInfoVal = "line-directives-only";
1348     break;
1349   case codegenoptions::DebugInfoConstructor:
1350     DebugInfoVal = "constructor";
1351     break;
1352   case codegenoptions::LimitedDebugInfo:
1353     DebugInfoVal = "limited";
1354     break;
1355   case codegenoptions::FullDebugInfo:
1356     DebugInfoVal = "standalone";
1357     break;
1358   case codegenoptions::UnusedTypeInfo:
1359     DebugInfoVal = "unused-types";
1360     break;
1361   case codegenoptions::NoDebugInfo: // default value
1362     DebugInfoVal = None;
1363     break;
1364   case codegenoptions::LocTrackingOnly: // implied value
1365     DebugInfoVal = None;
1366     break;
1367   }
1368   if (DebugInfoVal)
1369     GenerateArg(Args, OPT_debug_info_kind_EQ, *DebugInfoVal, SA);
1370 
1371   if (Opts.DebugInfo == codegenoptions::DebugInfoConstructor)
1372     GenerateArg(Args, OPT_fuse_ctor_homing, SA);
1373 
1374   for (const auto &Prefix : Opts.DebugPrefixMap)
1375     GenerateArg(Args, OPT_fdebug_prefix_map_EQ,
1376                 Prefix.first + "=" + Prefix.second, SA);
1377 
1378   for (const auto &Prefix : Opts.CoveragePrefixMap)
1379     GenerateArg(Args, OPT_fcoverage_prefix_map_EQ,
1380                 Prefix.first + "=" + Prefix.second, SA);
1381 
1382   if (Opts.NewStructPathTBAA)
1383     GenerateArg(Args, OPT_new_struct_path_tbaa, SA);
1384 
1385   if (Opts.OptimizeSize == 1)
1386     GenerateArg(Args, OPT_O, "s", SA);
1387   else if (Opts.OptimizeSize == 2)
1388     GenerateArg(Args, OPT_O, "z", SA);
1389 
1390   // SimplifyLibCalls is set only in the absence of -fno-builtin and
1391   // -ffreestanding. We'll consider that when generating them.
1392 
1393   // NoBuiltinFuncs are generated by LangOptions.
1394 
1395   if (Opts.UnrollLoops && Opts.OptimizationLevel <= 1)
1396     GenerateArg(Args, OPT_funroll_loops, SA);
1397   else if (!Opts.UnrollLoops && Opts.OptimizationLevel > 1)
1398     GenerateArg(Args, OPT_fno_unroll_loops, SA);
1399 
1400   if (!Opts.BinutilsVersion.empty())
1401     GenerateArg(Args, OPT_fbinutils_version_EQ, Opts.BinutilsVersion, SA);
1402 
1403   if (Opts.DebugNameTable ==
1404       static_cast<unsigned>(llvm::DICompileUnit::DebugNameTableKind::GNU))
1405     GenerateArg(Args, OPT_ggnu_pubnames, SA);
1406   else if (Opts.DebugNameTable ==
1407            static_cast<unsigned>(
1408                llvm::DICompileUnit::DebugNameTableKind::Default))
1409     GenerateArg(Args, OPT_gpubnames, SA);
1410 
1411   // ProfileInstrumentUsePath is marshalled automatically, no need to generate
1412   // it or PGOUseInstrumentor.
1413 
1414   if (Opts.TimePasses) {
1415     if (Opts.TimePassesPerRun)
1416       GenerateArg(Args, OPT_ftime_report_EQ, "per-pass-run", SA);
1417     else
1418       GenerateArg(Args, OPT_ftime_report, SA);
1419   }
1420 
1421   if (Opts.PrepareForLTO && !Opts.PrepareForThinLTO)
1422     GenerateArg(Args, OPT_flto, SA);
1423 
1424   if (Opts.PrepareForThinLTO)
1425     GenerateArg(Args, OPT_flto_EQ, "thin", SA);
1426 
1427   if (!Opts.ThinLTOIndexFile.empty())
1428     GenerateArg(Args, OPT_fthinlto_index_EQ, Opts.ThinLTOIndexFile, SA);
1429 
1430   if (Opts.SaveTempsFilePrefix == OutputFile)
1431     GenerateArg(Args, OPT_save_temps_EQ, "obj", SA);
1432 
1433   StringRef MemProfileBasename("memprof.profraw");
1434   if (!Opts.MemoryProfileOutput.empty()) {
1435     if (Opts.MemoryProfileOutput == MemProfileBasename) {
1436       GenerateArg(Args, OPT_fmemory_profile, SA);
1437     } else {
1438       size_t ArgLength =
1439           Opts.MemoryProfileOutput.size() - MemProfileBasename.size();
1440       GenerateArg(Args, OPT_fmemory_profile_EQ,
1441                   Opts.MemoryProfileOutput.substr(0, ArgLength), SA);
1442     }
1443   }
1444 
1445   if (memcmp(Opts.CoverageVersion, "408*", 4) != 0)
1446     GenerateArg(Args, OPT_coverage_version_EQ,
1447                 StringRef(Opts.CoverageVersion, 4), SA);
1448 
1449   // TODO: Check if we need to generate arguments stored in CmdArgs. (Namely
1450   //  '-fembed_bitcode', which does not map to any CompilerInvocation field and
1451   //  won't be generated.)
1452 
1453   if (Opts.XRayInstrumentationBundle.Mask != XRayInstrKind::All) {
1454     std::string InstrBundle =
1455         serializeXRayInstrumentationBundle(Opts.XRayInstrumentationBundle);
1456     if (!InstrBundle.empty())
1457       GenerateArg(Args, OPT_fxray_instrumentation_bundle, InstrBundle, SA);
1458   }
1459 
1460   if (Opts.CFProtectionReturn && Opts.CFProtectionBranch)
1461     GenerateArg(Args, OPT_fcf_protection_EQ, "full", SA);
1462   else if (Opts.CFProtectionReturn)
1463     GenerateArg(Args, OPT_fcf_protection_EQ, "return", SA);
1464   else if (Opts.CFProtectionBranch)
1465     GenerateArg(Args, OPT_fcf_protection_EQ, "branch", SA);
1466 
1467   for (const auto &F : Opts.LinkBitcodeFiles) {
1468     bool Builtint = F.LinkFlags == llvm::Linker::Flags::LinkOnlyNeeded &&
1469                     F.PropagateAttrs && F.Internalize;
1470     GenerateArg(Args,
1471                 Builtint ? OPT_mlink_builtin_bitcode : OPT_mlink_bitcode_file,
1472                 F.Filename, SA);
1473   }
1474 
1475   // TODO: Consider removing marshalling annotations from f[no_]emulated_tls.
1476   //  That would make it easy to generate the option only **once** if it was
1477   //  explicitly set to non-default value.
1478   if (Opts.ExplicitEmulatedTLS) {
1479     GenerateArg(
1480         Args, Opts.EmulatedTLS ? OPT_femulated_tls : OPT_fno_emulated_tls, SA);
1481   }
1482 
1483   if (Opts.FPDenormalMode != llvm::DenormalMode::getIEEE())
1484     GenerateArg(Args, OPT_fdenormal_fp_math_EQ, Opts.FPDenormalMode.str(), SA);
1485 
1486   if (Opts.FP32DenormalMode != llvm::DenormalMode::getIEEE())
1487     GenerateArg(Args, OPT_fdenormal_fp_math_f32_EQ, Opts.FP32DenormalMode.str(),
1488                 SA);
1489 
1490   if (Opts.StructReturnConvention == CodeGenOptions::SRCK_OnStack) {
1491     OptSpecifier Opt =
1492         T.isPPC32() ? OPT_maix_struct_return : OPT_fpcc_struct_return;
1493     GenerateArg(Args, Opt, SA);
1494   } else if (Opts.StructReturnConvention == CodeGenOptions::SRCK_InRegs) {
1495     OptSpecifier Opt =
1496         T.isPPC32() ? OPT_msvr4_struct_return : OPT_freg_struct_return;
1497     GenerateArg(Args, Opt, SA);
1498   }
1499 
1500   if (Opts.EnableAIXExtendedAltivecABI)
1501     GenerateArg(Args, OPT_mabi_EQ_vec_extabi, SA);
1502 
1503   if (!Opts.OptRecordPasses.empty())
1504     GenerateArg(Args, OPT_opt_record_passes, Opts.OptRecordPasses, SA);
1505 
1506   if (!Opts.OptRecordFormat.empty())
1507     GenerateArg(Args, OPT_opt_record_format, Opts.OptRecordFormat, SA);
1508 
1509   GenerateOptimizationRemark(Args, SA, OPT_Rpass_EQ, "pass",
1510                              Opts.OptimizationRemark);
1511 
1512   GenerateOptimizationRemark(Args, SA, OPT_Rpass_missed_EQ, "pass-missed",
1513                              Opts.OptimizationRemarkMissed);
1514 
1515   GenerateOptimizationRemark(Args, SA, OPT_Rpass_analysis_EQ, "pass-analysis",
1516                              Opts.OptimizationRemarkAnalysis);
1517 
1518   GenerateArg(Args, OPT_fdiagnostics_hotness_threshold_EQ,
1519               Opts.DiagnosticsHotnessThreshold
1520                   ? Twine(*Opts.DiagnosticsHotnessThreshold)
1521                   : "auto",
1522               SA);
1523 
1524   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeRecover))
1525     GenerateArg(Args, OPT_fsanitize_recover_EQ, Sanitizer, SA);
1526 
1527   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeTrap))
1528     GenerateArg(Args, OPT_fsanitize_trap_EQ, Sanitizer, SA);
1529 
1530   if (!Opts.EmitVersionIdentMetadata)
1531     GenerateArg(Args, OPT_Qn, SA);
1532 
1533   switch (Opts.FiniteLoops) {
1534   case CodeGenOptions::FiniteLoopsKind::Language:
1535     break;
1536   case CodeGenOptions::FiniteLoopsKind::Always:
1537     GenerateArg(Args, OPT_ffinite_loops, SA);
1538     break;
1539   case CodeGenOptions::FiniteLoopsKind::Never:
1540     GenerateArg(Args, OPT_fno_finite_loops, SA);
1541     break;
1542   }
1543 }
1544 
1545 bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
1546                                           InputKind IK,
1547                                           DiagnosticsEngine &Diags,
1548                                           const llvm::Triple &T,
1549                                           const std::string &OutputFile,
1550                                           const LangOptions &LangOptsRef) {
1551   unsigned NumErrorsBefore = Diags.getNumErrors();
1552 
1553   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
1554   // TODO: This could be done in Driver
1555   unsigned MaxOptLevel = 3;
1556   if (OptimizationLevel > MaxOptLevel) {
1557     // If the optimization level is not supported, fall back on the default
1558     // optimization
1559     Diags.Report(diag::warn_drv_optimization_value)
1560         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
1561     OptimizationLevel = MaxOptLevel;
1562   }
1563   Opts.OptimizationLevel = OptimizationLevel;
1564 
1565   // The key paths of codegen options defined in Options.td start with
1566   // "CodeGenOpts.". Let's provide the expected variable name and type.
1567   CodeGenOptions &CodeGenOpts = Opts;
1568   // Some codegen options depend on language options. Let's provide the expected
1569   // variable name and type.
1570   const LangOptions *LangOpts = &LangOptsRef;
1571 
1572 #define CODEGEN_OPTION_WITH_MARSHALLING(                                       \
1573     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1574     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1575     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1576     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1577   PARSE_OPTION_WITH_MARSHALLING(                                               \
1578       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
1579       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
1580 #include "clang/Driver/Options.inc"
1581 #undef CODEGEN_OPTION_WITH_MARSHALLING
1582 
1583   // At O0 we want to fully disable inlining outside of cases marked with
1584   // 'alwaysinline' that are required for correctness.
1585   Opts.setInlining((Opts.OptimizationLevel == 0)
1586                        ? CodeGenOptions::OnlyAlwaysInlining
1587                        : CodeGenOptions::NormalInlining);
1588   // Explicit inlining flags can disable some or all inlining even at
1589   // optimization levels above zero.
1590   if (Arg *InlineArg = Args.getLastArg(
1591           options::OPT_finline_functions, options::OPT_finline_hint_functions,
1592           options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
1593     if (Opts.OptimizationLevel > 0) {
1594       const Option &InlineOpt = InlineArg->getOption();
1595       if (InlineOpt.matches(options::OPT_finline_functions))
1596         Opts.setInlining(CodeGenOptions::NormalInlining);
1597       else if (InlineOpt.matches(options::OPT_finline_hint_functions))
1598         Opts.setInlining(CodeGenOptions::OnlyHintInlining);
1599       else
1600         Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
1601     }
1602   }
1603 
1604   // PIC defaults to -fno-direct-access-external-data while non-PIC defaults to
1605   // -fdirect-access-external-data.
1606   Opts.DirectAccessExternalData =
1607       Args.hasArg(OPT_fdirect_access_external_data) ||
1608       (!Args.hasArg(OPT_fno_direct_access_external_data) &&
1609        LangOpts->PICLevel == 0);
1610 
1611   if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
1612     unsigned Val =
1613         llvm::StringSwitch<unsigned>(A->getValue())
1614             .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
1615             .Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
1616             .Case("constructor", codegenoptions::DebugInfoConstructor)
1617             .Case("limited", codegenoptions::LimitedDebugInfo)
1618             .Case("standalone", codegenoptions::FullDebugInfo)
1619             .Case("unused-types", codegenoptions::UnusedTypeInfo)
1620             .Default(~0U);
1621     if (Val == ~0U)
1622       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1623                                                 << A->getValue();
1624     else
1625       Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
1626   }
1627 
1628   // If -fuse-ctor-homing is set and limited debug info is already on, then use
1629   // constructor homing.
1630   if (Args.getLastArg(OPT_fuse_ctor_homing))
1631     if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
1632       Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
1633 
1634   for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ)) {
1635     auto Split = StringRef(Arg).split('=');
1636     Opts.DebugPrefixMap.insert(
1637         {std::string(Split.first), std::string(Split.second)});
1638   }
1639 
1640   for (const auto &Arg : Args.getAllArgValues(OPT_fcoverage_prefix_map_EQ)) {
1641     auto Split = StringRef(Arg).split('=');
1642     Opts.CoveragePrefixMap.insert(
1643         {std::string(Split.first), std::string(Split.second)});
1644   }
1645 
1646   const llvm::Triple::ArchType DebugEntryValueArchs[] = {
1647       llvm::Triple::x86, llvm::Triple::x86_64, llvm::Triple::aarch64,
1648       llvm::Triple::arm, llvm::Triple::armeb, llvm::Triple::mips,
1649       llvm::Triple::mipsel, llvm::Triple::mips64, llvm::Triple::mips64el};
1650 
1651   if (Opts.OptimizationLevel > 0 && Opts.hasReducedDebugInfo() &&
1652       llvm::is_contained(DebugEntryValueArchs, T.getArch()))
1653     Opts.EmitCallSiteInfo = true;
1654 
1655   if (!Opts.EnableDIPreservationVerify && Opts.DIBugsReportFilePath.size()) {
1656     Diags.Report(diag::warn_ignoring_verify_debuginfo_preserve_export)
1657         << Opts.DIBugsReportFilePath;
1658     Opts.DIBugsReportFilePath = "";
1659   }
1660 
1661   Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
1662                            Args.hasArg(OPT_new_struct_path_tbaa);
1663   Opts.OptimizeSize = getOptimizationLevelSize(Args);
1664   Opts.SimplifyLibCalls = !LangOpts->NoBuiltin;
1665   if (Opts.SimplifyLibCalls)
1666     Opts.NoBuiltinFuncs = LangOpts->NoBuiltinFuncs;
1667   Opts.UnrollLoops =
1668       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
1669                    (Opts.OptimizationLevel > 1));
1670   Opts.BinutilsVersion =
1671       std::string(Args.getLastArgValue(OPT_fbinutils_version_EQ));
1672 
1673   Opts.DebugNameTable = static_cast<unsigned>(
1674       Args.hasArg(OPT_ggnu_pubnames)
1675           ? llvm::DICompileUnit::DebugNameTableKind::GNU
1676           : Args.hasArg(OPT_gpubnames)
1677                 ? llvm::DICompileUnit::DebugNameTableKind::Default
1678                 : llvm::DICompileUnit::DebugNameTableKind::None);
1679 
1680   if (!Opts.ProfileInstrumentUsePath.empty())
1681     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
1682 
1683   if (const Arg *A = Args.getLastArg(OPT_ftime_report, OPT_ftime_report_EQ)) {
1684     Opts.TimePasses = true;
1685 
1686     // -ftime-report= is only for new pass manager.
1687     if (A->getOption().getID() == OPT_ftime_report_EQ) {
1688       if (Opts.LegacyPassManager)
1689         Diags.Report(diag::err_drv_argument_only_allowed_with)
1690             << A->getAsString(Args) << "-fno-legacy-pass-manager";
1691 
1692       StringRef Val = A->getValue();
1693       if (Val == "per-pass")
1694         Opts.TimePassesPerRun = false;
1695       else if (Val == "per-pass-run")
1696         Opts.TimePassesPerRun = true;
1697       else
1698         Diags.Report(diag::err_drv_invalid_value)
1699             << A->getAsString(Args) << A->getValue();
1700     }
1701   }
1702 
1703   Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
1704   Opts.PrepareForThinLTO = false;
1705   if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
1706     StringRef S = A->getValue();
1707     if (S == "thin")
1708       Opts.PrepareForThinLTO = true;
1709     else if (S != "full")
1710       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
1711   }
1712   if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
1713     if (IK.getLanguage() != Language::LLVM_IR)
1714       Diags.Report(diag::err_drv_argument_only_allowed_with)
1715           << A->getAsString(Args) << "-x ir";
1716     Opts.ThinLTOIndexFile =
1717         std::string(Args.getLastArgValue(OPT_fthinlto_index_EQ));
1718   }
1719   if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
1720     Opts.SaveTempsFilePrefix =
1721         llvm::StringSwitch<std::string>(A->getValue())
1722             .Case("obj", OutputFile)
1723             .Default(llvm::sys::path::filename(OutputFile).str());
1724 
1725   // The memory profile runtime appends the pid to make this name more unique.
1726   const char *MemProfileBasename = "memprof.profraw";
1727   if (Args.hasArg(OPT_fmemory_profile_EQ)) {
1728     SmallString<128> Path(
1729         std::string(Args.getLastArgValue(OPT_fmemory_profile_EQ)));
1730     llvm::sys::path::append(Path, MemProfileBasename);
1731     Opts.MemoryProfileOutput = std::string(Path);
1732   } else if (Args.hasArg(OPT_fmemory_profile))
1733     Opts.MemoryProfileOutput = MemProfileBasename;
1734 
1735   memcpy(Opts.CoverageVersion, "408*", 4);
1736   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
1737     if (Args.hasArg(OPT_coverage_version_EQ)) {
1738       StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
1739       if (CoverageVersion.size() != 4) {
1740         Diags.Report(diag::err_drv_invalid_value)
1741             << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
1742             << CoverageVersion;
1743       } else {
1744         memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
1745       }
1746     }
1747   }
1748   // FIXME: For backend options that are not yet recorded as function
1749   // attributes in the IR, keep track of them so we can embed them in a
1750   // separate data section and use them when building the bitcode.
1751   for (const auto &A : Args) {
1752     // Do not encode output and input.
1753     if (A->getOption().getID() == options::OPT_o ||
1754         A->getOption().getID() == options::OPT_INPUT ||
1755         A->getOption().getID() == options::OPT_x ||
1756         A->getOption().getID() == options::OPT_fembed_bitcode ||
1757         A->getOption().matches(options::OPT_W_Group))
1758       continue;
1759     ArgStringList ASL;
1760     A->render(Args, ASL);
1761     for (const auto &arg : ASL) {
1762       StringRef ArgStr(arg);
1763       Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
1764       // using \00 to separate each commandline options.
1765       Opts.CmdArgs.push_back('\0');
1766     }
1767   }
1768 
1769   auto XRayInstrBundles =
1770       Args.getAllArgValues(OPT_fxray_instrumentation_bundle);
1771   if (XRayInstrBundles.empty())
1772     Opts.XRayInstrumentationBundle.Mask = XRayInstrKind::All;
1773   else
1774     for (const auto &A : XRayInstrBundles)
1775       parseXRayInstrumentationBundle("-fxray-instrumentation-bundle=", A, Args,
1776                                      Diags, Opts.XRayInstrumentationBundle);
1777 
1778   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
1779     StringRef Name = A->getValue();
1780     if (Name == "full") {
1781       Opts.CFProtectionReturn = 1;
1782       Opts.CFProtectionBranch = 1;
1783     } else if (Name == "return")
1784       Opts.CFProtectionReturn = 1;
1785     else if (Name == "branch")
1786       Opts.CFProtectionBranch = 1;
1787     else if (Name != "none")
1788       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1789   }
1790 
1791   for (auto *A :
1792        Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_builtin_bitcode)) {
1793     CodeGenOptions::BitcodeFileToLink F;
1794     F.Filename = A->getValue();
1795     if (A->getOption().matches(OPT_mlink_builtin_bitcode)) {
1796       F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
1797       // When linking CUDA bitcode, propagate function attributes so that
1798       // e.g. libdevice gets fast-math attrs if we're building with fast-math.
1799       F.PropagateAttrs = true;
1800       F.Internalize = true;
1801     }
1802     Opts.LinkBitcodeFiles.push_back(F);
1803   }
1804 
1805   if (Args.getLastArg(OPT_femulated_tls) ||
1806       Args.getLastArg(OPT_fno_emulated_tls)) {
1807     Opts.ExplicitEmulatedTLS = true;
1808   }
1809 
1810   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
1811     StringRef Val = A->getValue();
1812     Opts.FPDenormalMode = llvm::parseDenormalFPAttribute(Val);
1813     if (!Opts.FPDenormalMode.isValid())
1814       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1815   }
1816 
1817   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_f32_EQ)) {
1818     StringRef Val = A->getValue();
1819     Opts.FP32DenormalMode = llvm::parseDenormalFPAttribute(Val);
1820     if (!Opts.FP32DenormalMode.isValid())
1821       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1822   }
1823 
1824   // X86_32 has -fppc-struct-return and -freg-struct-return.
1825   // PPC32 has -maix-struct-return and -msvr4-struct-return.
1826   if (Arg *A =
1827           Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return,
1828                           OPT_maix_struct_return, OPT_msvr4_struct_return)) {
1829     // TODO: We might want to consider enabling these options on AIX in the
1830     // future.
1831     if (T.isOSAIX())
1832       Diags.Report(diag::err_drv_unsupported_opt_for_target)
1833           << A->getSpelling() << T.str();
1834 
1835     const Option &O = A->getOption();
1836     if (O.matches(OPT_fpcc_struct_return) ||
1837         O.matches(OPT_maix_struct_return)) {
1838       Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
1839     } else {
1840       assert(O.matches(OPT_freg_struct_return) ||
1841              O.matches(OPT_msvr4_struct_return));
1842       Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
1843     }
1844   }
1845 
1846   if (Arg *A =
1847           Args.getLastArg(OPT_mabi_EQ_vec_default, OPT_mabi_EQ_vec_extabi)) {
1848     if (!T.isOSAIX())
1849       Diags.Report(diag::err_drv_unsupported_opt_for_target)
1850           << A->getSpelling() << T.str();
1851 
1852     const Option &O = A->getOption();
1853     if (O.matches(OPT_mabi_EQ_vec_default))
1854       Diags.Report(diag::err_aix_default_altivec_abi)
1855           << A->getSpelling() << T.str();
1856     else {
1857       assert(O.matches(OPT_mabi_EQ_vec_extabi));
1858       Opts.EnableAIXExtendedAltivecABI = 1;
1859     }
1860   }
1861 
1862   bool NeedLocTracking = false;
1863 
1864   if (!Opts.OptRecordFile.empty())
1865     NeedLocTracking = true;
1866 
1867   if (Arg *A = Args.getLastArg(OPT_opt_record_passes)) {
1868     Opts.OptRecordPasses = A->getValue();
1869     NeedLocTracking = true;
1870   }
1871 
1872   if (Arg *A = Args.getLastArg(OPT_opt_record_format)) {
1873     Opts.OptRecordFormat = A->getValue();
1874     NeedLocTracking = true;
1875   }
1876 
1877   Opts.OptimizationRemark =
1878       ParseOptimizationRemark(Diags, Args, OPT_Rpass_EQ, "pass");
1879 
1880   Opts.OptimizationRemarkMissed =
1881       ParseOptimizationRemark(Diags, Args, OPT_Rpass_missed_EQ, "pass-missed");
1882 
1883   Opts.OptimizationRemarkAnalysis = ParseOptimizationRemark(
1884       Diags, Args, OPT_Rpass_analysis_EQ, "pass-analysis");
1885 
1886   NeedLocTracking |= Opts.OptimizationRemark.hasValidPattern() ||
1887                      Opts.OptimizationRemarkMissed.hasValidPattern() ||
1888                      Opts.OptimizationRemarkAnalysis.hasValidPattern();
1889 
1890   bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
1891   bool UsingProfile = UsingSampleProfile ||
1892       (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
1893 
1894   if (Opts.DiagnosticsWithHotness && !UsingProfile &&
1895       // An IR file will contain PGO as metadata
1896       IK.getLanguage() != Language::LLVM_IR)
1897     Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1898         << "-fdiagnostics-show-hotness";
1899 
1900   // Parse remarks hotness threshold. Valid value is either integer or 'auto'.
1901   if (auto *arg =
1902           Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
1903     auto ResultOrErr =
1904         llvm::remarks::parseHotnessThresholdOption(arg->getValue());
1905 
1906     if (!ResultOrErr) {
1907       Diags.Report(diag::err_drv_invalid_diagnotics_hotness_threshold)
1908           << "-fdiagnostics-hotness-threshold=";
1909     } else {
1910       Opts.DiagnosticsHotnessThreshold = *ResultOrErr;
1911       if ((!Opts.DiagnosticsHotnessThreshold.hasValue() ||
1912            Opts.DiagnosticsHotnessThreshold.getValue() > 0) &&
1913           !UsingProfile)
1914         Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1915             << "-fdiagnostics-hotness-threshold=";
1916     }
1917   }
1918 
1919   // If the user requested to use a sample profile for PGO, then the
1920   // backend will need to track source location information so the profile
1921   // can be incorporated into the IR.
1922   if (UsingSampleProfile)
1923     NeedLocTracking = true;
1924 
1925   // If the user requested a flag that requires source locations available in
1926   // the backend, make sure that the backend tracks source location information.
1927   if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
1928     Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
1929 
1930   // Parse -fsanitize-recover= arguments.
1931   // FIXME: Report unrecoverable sanitizers incorrectly specified here.
1932   parseSanitizerKinds("-fsanitize-recover=",
1933                       Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
1934                       Opts.SanitizeRecover);
1935   parseSanitizerKinds("-fsanitize-trap=",
1936                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
1937                       Opts.SanitizeTrap);
1938 
1939   Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
1940 
1941   if (Args.hasArg(options::OPT_ffinite_loops))
1942     Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Always;
1943   else if (Args.hasArg(options::OPT_fno_finite_loops))
1944     Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Never;
1945 
1946   return Diags.getNumErrors() == NumErrorsBefore;
1947 }
1948 
1949 static void
1950 GenerateDependencyOutputArgs(const DependencyOutputOptions &Opts,
1951                              SmallVectorImpl<const char *> &Args,
1952                              CompilerInvocation::StringAllocator SA) {
1953   const DependencyOutputOptions &DependencyOutputOpts = Opts;
1954 #define DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING(                             \
1955     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1956     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1957     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1958     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1959   GENERATE_OPTION_WITH_MARSHALLING(                                            \
1960       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
1961       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
1962 #include "clang/Driver/Options.inc"
1963 #undef DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING
1964 
1965   if (Opts.ShowIncludesDest != ShowIncludesDestination::None)
1966     GenerateArg(Args, OPT_show_includes, SA);
1967 
1968   for (const auto &Dep : Opts.ExtraDeps) {
1969     switch (Dep.second) {
1970     case EDK_SanitizeBlacklist:
1971       // Sanitizer blacklist arguments are generated from LanguageOptions.
1972       continue;
1973     case EDK_ModuleFile:
1974       // Module file arguments are generated from FrontendOptions and
1975       // HeaderSearchOptions.
1976       continue;
1977     case EDK_ProfileList:
1978       // Profile list arguments are generated from LanguageOptions via the
1979       // marshalling infrastructure.
1980       continue;
1981     case EDK_DepFileEntry:
1982       GenerateArg(Args, OPT_fdepfile_entry, Dep.first, SA);
1983       break;
1984     }
1985   }
1986 }
1987 
1988 static bool ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1989                                       ArgList &Args, DiagnosticsEngine &Diags,
1990                                       frontend::ActionKind Action,
1991                                       bool ShowLineMarkers) {
1992   unsigned NumErrorsBefore = Diags.getNumErrors();
1993 
1994   DependencyOutputOptions &DependencyOutputOpts = Opts;
1995 #define DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING(                             \
1996     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1997     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1998     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1999     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2000   PARSE_OPTION_WITH_MARSHALLING(                                               \
2001       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2002       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2003 #include "clang/Driver/Options.inc"
2004 #undef DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING
2005 
2006   if (Args.hasArg(OPT_show_includes)) {
2007     // Writing both /showIncludes and preprocessor output to stdout
2008     // would produce interleaved output, so use stderr for /showIncludes.
2009     // This behaves the same as cl.exe, when /E, /EP or /P are passed.
2010     if (Action == frontend::PrintPreprocessedInput || !ShowLineMarkers)
2011       Opts.ShowIncludesDest = ShowIncludesDestination::Stderr;
2012     else
2013       Opts.ShowIncludesDest = ShowIncludesDestination::Stdout;
2014   } else {
2015     Opts.ShowIncludesDest = ShowIncludesDestination::None;
2016   }
2017 
2018   // Add sanitizer blacklists as extra dependencies.
2019   // They won't be discovered by the regular preprocessor, so
2020   // we let make / ninja to know about this implicit dependency.
2021   if (!Args.hasArg(OPT_fno_sanitize_blacklist)) {
2022     for (const auto *A : Args.filtered(OPT_fsanitize_blacklist)) {
2023       StringRef Val = A->getValue();
2024       if (Val.find('=') == StringRef::npos)
2025         Opts.ExtraDeps.emplace_back(std::string(Val), EDK_SanitizeBlacklist);
2026     }
2027     if (Opts.IncludeSystemHeaders) {
2028       for (const auto *A : Args.filtered(OPT_fsanitize_system_blacklist)) {
2029         StringRef Val = A->getValue();
2030         if (Val.find('=') == StringRef::npos)
2031           Opts.ExtraDeps.emplace_back(std::string(Val), EDK_SanitizeBlacklist);
2032       }
2033     }
2034   }
2035 
2036   // -fprofile-list= dependencies.
2037   for (const auto &Filename : Args.getAllArgValues(OPT_fprofile_list_EQ))
2038     Opts.ExtraDeps.emplace_back(Filename, EDK_ProfileList);
2039 
2040   // Propagate the extra dependencies.
2041   for (const auto *A : Args.filtered(OPT_fdepfile_entry))
2042     Opts.ExtraDeps.emplace_back(A->getValue(), EDK_DepFileEntry);
2043 
2044   // Only the -fmodule-file=<file> form.
2045   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2046     StringRef Val = A->getValue();
2047     if (Val.find('=') == StringRef::npos)
2048       Opts.ExtraDeps.emplace_back(std::string(Val), EDK_ModuleFile);
2049   }
2050 
2051   return Diags.getNumErrors() == NumErrorsBefore;
2052 }
2053 
2054 static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
2055   // Color diagnostics default to auto ("on" if terminal supports) in the driver
2056   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
2057   // Support both clang's -f[no-]color-diagnostics and gcc's
2058   // -f[no-]diagnostics-colors[=never|always|auto].
2059   enum {
2060     Colors_On,
2061     Colors_Off,
2062     Colors_Auto
2063   } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
2064   for (auto *A : Args) {
2065     const Option &O = A->getOption();
2066     if (O.matches(options::OPT_fcolor_diagnostics) ||
2067         O.matches(options::OPT_fdiagnostics_color)) {
2068       ShowColors = Colors_On;
2069     } else if (O.matches(options::OPT_fno_color_diagnostics) ||
2070                O.matches(options::OPT_fno_diagnostics_color)) {
2071       ShowColors = Colors_Off;
2072     } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
2073       StringRef Value(A->getValue());
2074       if (Value == "always")
2075         ShowColors = Colors_On;
2076       else if (Value == "never")
2077         ShowColors = Colors_Off;
2078       else if (Value == "auto")
2079         ShowColors = Colors_Auto;
2080     }
2081   }
2082   return ShowColors == Colors_On ||
2083          (ShowColors == Colors_Auto &&
2084           llvm::sys::Process::StandardErrHasColors());
2085 }
2086 
2087 static bool checkVerifyPrefixes(const std::vector<std::string> &VerifyPrefixes,
2088                                 DiagnosticsEngine &Diags) {
2089   bool Success = true;
2090   for (const auto &Prefix : VerifyPrefixes) {
2091     // Every prefix must start with a letter and contain only alphanumeric
2092     // characters, hyphens, and underscores.
2093     auto BadChar = llvm::find_if(Prefix, [](char C) {
2094       return !isAlphanumeric(C) && C != '-' && C != '_';
2095     });
2096     if (BadChar != Prefix.end() || !isLetter(Prefix[0])) {
2097       Success = false;
2098       Diags.Report(diag::err_drv_invalid_value) << "-verify=" << Prefix;
2099       Diags.Report(diag::note_drv_verify_prefix_spelling);
2100     }
2101   }
2102   return Success;
2103 }
2104 
2105 static void GenerateFileSystemArgs(const FileSystemOptions &Opts,
2106                                    SmallVectorImpl<const char *> &Args,
2107                                    CompilerInvocation::StringAllocator SA) {
2108   const FileSystemOptions &FileSystemOpts = Opts;
2109 
2110 #define FILE_SYSTEM_OPTION_WITH_MARSHALLING(                                   \
2111     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2112     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2113     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2114     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2115   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2116       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2117       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2118 #include "clang/Driver/Options.inc"
2119 #undef FILE_SYSTEM_OPTION_WITH_MARSHALLING
2120 }
2121 
2122 static bool ParseFileSystemArgs(FileSystemOptions &Opts, const ArgList &Args,
2123                                 DiagnosticsEngine &Diags) {
2124   unsigned NumErrorsBefore = Diags.getNumErrors();
2125 
2126   FileSystemOptions &FileSystemOpts = Opts;
2127 
2128 #define FILE_SYSTEM_OPTION_WITH_MARSHALLING(                                   \
2129     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2130     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2131     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2132     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2133   PARSE_OPTION_WITH_MARSHALLING(                                               \
2134       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2135       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2136 #include "clang/Driver/Options.inc"
2137 #undef FILE_SYSTEM_OPTION_WITH_MARSHALLING
2138 
2139   return Diags.getNumErrors() == NumErrorsBefore;
2140 }
2141 
2142 static void GenerateMigratorArgs(const MigratorOptions &Opts,
2143                                  SmallVectorImpl<const char *> &Args,
2144                                  CompilerInvocation::StringAllocator SA) {
2145   const MigratorOptions &MigratorOpts = Opts;
2146 #define MIGRATOR_OPTION_WITH_MARSHALLING(                                      \
2147     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2148     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2149     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2150     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2151   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2152       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2153       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2154 #include "clang/Driver/Options.inc"
2155 #undef MIGRATOR_OPTION_WITH_MARSHALLING
2156 }
2157 
2158 static bool ParseMigratorArgs(MigratorOptions &Opts, const ArgList &Args,
2159                               DiagnosticsEngine &Diags) {
2160   unsigned NumErrorsBefore = Diags.getNumErrors();
2161 
2162   MigratorOptions &MigratorOpts = Opts;
2163 
2164 #define MIGRATOR_OPTION_WITH_MARSHALLING(                                      \
2165     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2166     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2167     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2168     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2169   PARSE_OPTION_WITH_MARSHALLING(                                               \
2170       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2171       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2172 #include "clang/Driver/Options.inc"
2173 #undef MIGRATOR_OPTION_WITH_MARSHALLING
2174 
2175   return Diags.getNumErrors() == NumErrorsBefore;
2176 }
2177 
2178 void CompilerInvocation::GenerateDiagnosticArgs(
2179     const DiagnosticOptions &Opts, SmallVectorImpl<const char *> &Args,
2180     StringAllocator SA, bool DefaultDiagColor) {
2181   const DiagnosticOptions *DiagnosticOpts = &Opts;
2182 #define DIAG_OPTION_WITH_MARSHALLING(                                          \
2183     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2184     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2185     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2186     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2187   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2188       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2189       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2190 #include "clang/Driver/Options.inc"
2191 #undef DIAG_OPTION_WITH_MARSHALLING
2192 
2193   if (!Opts.DiagnosticSerializationFile.empty())
2194     GenerateArg(Args, OPT_diagnostic_serialized_file,
2195                 Opts.DiagnosticSerializationFile, SA);
2196 
2197   if (Opts.ShowColors)
2198     GenerateArg(Args, OPT_fcolor_diagnostics, SA);
2199 
2200   if (Opts.VerifyDiagnostics &&
2201       llvm::is_contained(Opts.VerifyPrefixes, "expected"))
2202     GenerateArg(Args, OPT_verify, SA);
2203 
2204   for (const auto &Prefix : Opts.VerifyPrefixes)
2205     if (Prefix != "expected")
2206       GenerateArg(Args, OPT_verify_EQ, Prefix, SA);
2207 
2208   DiagnosticLevelMask VIU = Opts.getVerifyIgnoreUnexpected();
2209   if (VIU == DiagnosticLevelMask::None) {
2210     // This is the default, don't generate anything.
2211   } else if (VIU == DiagnosticLevelMask::All) {
2212     GenerateArg(Args, OPT_verify_ignore_unexpected, SA);
2213   } else {
2214     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Note) != 0)
2215       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "note", SA);
2216     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Remark) != 0)
2217       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "remark", SA);
2218     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Warning) != 0)
2219       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "warning", SA);
2220     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Error) != 0)
2221       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "error", SA);
2222   }
2223 
2224   for (const auto &Warning : Opts.Warnings) {
2225     // This option is automatically generated from UndefPrefixes.
2226     if (Warning == "undef-prefix")
2227       continue;
2228     Args.push_back(SA(StringRef("-W") + Warning));
2229   }
2230 
2231   for (const auto &Remark : Opts.Remarks) {
2232     // These arguments are generated from OptimizationRemark fields of
2233     // CodeGenOptions.
2234     StringRef IgnoredRemarks[] = {"pass",          "no-pass",
2235                                   "pass-analysis", "no-pass-analysis",
2236                                   "pass-missed",   "no-pass-missed"};
2237     if (llvm::is_contained(IgnoredRemarks, Remark))
2238       continue;
2239 
2240     Args.push_back(SA(StringRef("-R") + Remark));
2241   }
2242 }
2243 
2244 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
2245                                 DiagnosticsEngine *Diags,
2246                                 bool DefaultDiagColor) {
2247   Optional<DiagnosticsEngine> IgnoringDiags;
2248   if (!Diags) {
2249     IgnoringDiags.emplace(new DiagnosticIDs(), new DiagnosticOptions(),
2250                           new IgnoringDiagConsumer());
2251     Diags = &*IgnoringDiags;
2252   }
2253 
2254   unsigned NumErrorsBefore = Diags->getNumErrors();
2255 
2256   // The key paths of diagnostic options defined in Options.td start with
2257   // "DiagnosticOpts->". Let's provide the expected variable name and type.
2258   DiagnosticOptions *DiagnosticOpts = &Opts;
2259 
2260 #define DIAG_OPTION_WITH_MARSHALLING(                                          \
2261     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2262     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2263     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2264     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2265   PARSE_OPTION_WITH_MARSHALLING(                                               \
2266       Args, *Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,    \
2267       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2268 #include "clang/Driver/Options.inc"
2269 #undef DIAG_OPTION_WITH_MARSHALLING
2270 
2271   llvm::sys::Process::UseANSIEscapeCodes(Opts.UseANSIEscapeCodes);
2272 
2273   if (Arg *A =
2274           Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
2275     Opts.DiagnosticSerializationFile = A->getValue();
2276   Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
2277 
2278   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify) || Args.hasArg(OPT_verify_EQ);
2279   Opts.VerifyPrefixes = Args.getAllArgValues(OPT_verify_EQ);
2280   if (Args.hasArg(OPT_verify))
2281     Opts.VerifyPrefixes.push_back("expected");
2282   // Keep VerifyPrefixes in its original order for the sake of diagnostics, and
2283   // then sort it to prepare for fast lookup using std::binary_search.
2284   if (!checkVerifyPrefixes(Opts.VerifyPrefixes, *Diags))
2285     Opts.VerifyDiagnostics = false;
2286   else
2287     llvm::sort(Opts.VerifyPrefixes);
2288   DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
2289   parseDiagnosticLevelMask(
2290       "-verify-ignore-unexpected=",
2291       Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ), *Diags, DiagMask);
2292   if (Args.hasArg(OPT_verify_ignore_unexpected))
2293     DiagMask = DiagnosticLevelMask::All;
2294   Opts.setVerifyIgnoreUnexpected(DiagMask);
2295   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
2296     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
2297     Diags->Report(diag::warn_ignoring_ftabstop_value)
2298         << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
2299   }
2300 
2301   addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
2302   addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
2303 
2304   return Diags->getNumErrors() == NumErrorsBefore;
2305 }
2306 
2307 /// Parse the argument to the -ftest-module-file-extension
2308 /// command-line argument.
2309 ///
2310 /// \returns true on error, false on success.
2311 static bool parseTestModuleFileExtensionArg(StringRef Arg,
2312                                             std::string &BlockName,
2313                                             unsigned &MajorVersion,
2314                                             unsigned &MinorVersion,
2315                                             bool &Hashed,
2316                                             std::string &UserInfo) {
2317   SmallVector<StringRef, 5> Args;
2318   Arg.split(Args, ':', 5);
2319   if (Args.size() < 5)
2320     return true;
2321 
2322   BlockName = std::string(Args[0]);
2323   if (Args[1].getAsInteger(10, MajorVersion)) return true;
2324   if (Args[2].getAsInteger(10, MinorVersion)) return true;
2325   if (Args[3].getAsInteger(2, Hashed)) return true;
2326   if (Args.size() > 4)
2327     UserInfo = std::string(Args[4]);
2328   return false;
2329 }
2330 
2331 /// Return a table that associates command line option specifiers with the
2332 /// frontend action. Note: The pair {frontend::PluginAction, OPT_plugin} is
2333 /// intentionally missing, as this case is handled separately from other
2334 /// frontend options.
2335 static const auto &getFrontendActionTable() {
2336   static const std::pair<frontend::ActionKind, unsigned> Table[] = {
2337       {frontend::ASTDeclList, OPT_ast_list},
2338 
2339       {frontend::ASTDump, OPT_ast_dump_all_EQ},
2340       {frontend::ASTDump, OPT_ast_dump_all},
2341       {frontend::ASTDump, OPT_ast_dump_EQ},
2342       {frontend::ASTDump, OPT_ast_dump},
2343       {frontend::ASTDump, OPT_ast_dump_lookups},
2344       {frontend::ASTDump, OPT_ast_dump_decl_types},
2345 
2346       {frontend::ASTPrint, OPT_ast_print},
2347       {frontend::ASTView, OPT_ast_view},
2348       {frontend::DumpCompilerOptions, OPT_compiler_options_dump},
2349       {frontend::DumpRawTokens, OPT_dump_raw_tokens},
2350       {frontend::DumpTokens, OPT_dump_tokens},
2351       {frontend::EmitAssembly, OPT_S},
2352       {frontend::EmitBC, OPT_emit_llvm_bc},
2353       {frontend::EmitHTML, OPT_emit_html},
2354       {frontend::EmitLLVM, OPT_emit_llvm},
2355       {frontend::EmitLLVMOnly, OPT_emit_llvm_only},
2356       {frontend::EmitCodeGenOnly, OPT_emit_codegen_only},
2357       {frontend::EmitCodeGenOnly, OPT_emit_codegen_only},
2358       {frontend::EmitObj, OPT_emit_obj},
2359 
2360       {frontend::FixIt, OPT_fixit_EQ},
2361       {frontend::FixIt, OPT_fixit},
2362 
2363       {frontend::GenerateModule, OPT_emit_module},
2364       {frontend::GenerateModuleInterface, OPT_emit_module_interface},
2365       {frontend::GenerateHeaderModule, OPT_emit_header_module},
2366       {frontend::GeneratePCH, OPT_emit_pch},
2367       {frontend::GenerateInterfaceStubs, OPT_emit_interface_stubs},
2368       {frontend::InitOnly, OPT_init_only},
2369       {frontend::ParseSyntaxOnly, OPT_fsyntax_only},
2370       {frontend::ModuleFileInfo, OPT_module_file_info},
2371       {frontend::VerifyPCH, OPT_verify_pch},
2372       {frontend::PrintPreamble, OPT_print_preamble},
2373       {frontend::PrintPreprocessedInput, OPT_E},
2374       {frontend::TemplightDump, OPT_templight_dump},
2375       {frontend::RewriteMacros, OPT_rewrite_macros},
2376       {frontend::RewriteObjC, OPT_rewrite_objc},
2377       {frontend::RewriteTest, OPT_rewrite_test},
2378       {frontend::RunAnalysis, OPT_analyze},
2379       {frontend::MigrateSource, OPT_migrate},
2380       {frontend::RunPreprocessorOnly, OPT_Eonly},
2381       {frontend::PrintDependencyDirectivesSourceMinimizerOutput,
2382           OPT_print_dependency_directives_minimized_source},
2383   };
2384 
2385   return Table;
2386 }
2387 
2388 /// Maps command line option to frontend action.
2389 static Optional<frontend::ActionKind> getFrontendAction(OptSpecifier &Opt) {
2390   for (const auto &ActionOpt : getFrontendActionTable())
2391     if (ActionOpt.second == Opt.getID())
2392       return ActionOpt.first;
2393 
2394   return None;
2395 }
2396 
2397 /// Maps frontend action to command line option.
2398 static Optional<OptSpecifier>
2399 getProgramActionOpt(frontend::ActionKind ProgramAction) {
2400   for (const auto &ActionOpt : getFrontendActionTable())
2401     if (ActionOpt.first == ProgramAction)
2402       return OptSpecifier(ActionOpt.second);
2403 
2404   return None;
2405 }
2406 
2407 static void GenerateFrontendArgs(const FrontendOptions &Opts,
2408                                  SmallVectorImpl<const char *> &Args,
2409                                  CompilerInvocation::StringAllocator SA,
2410                                  bool IsHeader) {
2411   const FrontendOptions &FrontendOpts = Opts;
2412 #define FRONTEND_OPTION_WITH_MARSHALLING(                                      \
2413     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2414     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2415     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2416     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2417   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2418       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2419       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2420 #include "clang/Driver/Options.inc"
2421 #undef FRONTEND_OPTION_WITH_MARSHALLING
2422 
2423   Optional<OptSpecifier> ProgramActionOpt =
2424       getProgramActionOpt(Opts.ProgramAction);
2425 
2426   // Generating a simple flag covers most frontend actions.
2427   std::function<void()> GenerateProgramAction = [&]() {
2428     GenerateArg(Args, *ProgramActionOpt, SA);
2429   };
2430 
2431   if (!ProgramActionOpt) {
2432     // PluginAction is the only program action handled separately.
2433     assert(Opts.ProgramAction == frontend::PluginAction &&
2434            "Frontend action without option.");
2435     GenerateProgramAction = [&]() {
2436       GenerateArg(Args, OPT_plugin, Opts.ActionName, SA);
2437     };
2438   }
2439 
2440   // FIXME: Simplify the complex 'AST dump' command line.
2441   if (Opts.ProgramAction == frontend::ASTDump) {
2442     GenerateProgramAction = [&]() {
2443       // ASTDumpLookups, ASTDumpDeclTypes and ASTDumpFilter are generated via
2444       // marshalling infrastructure.
2445 
2446       if (Opts.ASTDumpFormat != ADOF_Default) {
2447         StringRef Format;
2448         switch (Opts.ASTDumpFormat) {
2449         case ADOF_Default:
2450           llvm_unreachable("Default AST dump format.");
2451         case ADOF_JSON:
2452           Format = "json";
2453           break;
2454         }
2455 
2456         if (Opts.ASTDumpAll)
2457           GenerateArg(Args, OPT_ast_dump_all_EQ, Format, SA);
2458         if (Opts.ASTDumpDecls)
2459           GenerateArg(Args, OPT_ast_dump_EQ, Format, SA);
2460       } else {
2461         if (Opts.ASTDumpAll)
2462           GenerateArg(Args, OPT_ast_dump_all, SA);
2463         if (Opts.ASTDumpDecls)
2464           GenerateArg(Args, OPT_ast_dump, SA);
2465       }
2466     };
2467   }
2468 
2469   if (Opts.ProgramAction == frontend::FixIt && !Opts.FixItSuffix.empty()) {
2470     GenerateProgramAction = [&]() {
2471       GenerateArg(Args, OPT_fixit_EQ, Opts.FixItSuffix, SA);
2472     };
2473   }
2474 
2475   GenerateProgramAction();
2476 
2477   for (const auto &PluginArgs : Opts.PluginArgs) {
2478     Option Opt = getDriverOptTable().getOption(OPT_plugin_arg);
2479     const char *Spelling =
2480         SA(Opt.getPrefix() + Opt.getName() + PluginArgs.first);
2481     for (const auto &PluginArg : PluginArgs.second)
2482       denormalizeString(Args, Spelling, SA, Opt.getKind(), 0, PluginArg);
2483   }
2484 
2485   for (const auto &Ext : Opts.ModuleFileExtensions)
2486     if (auto *TestExt = dyn_cast_or_null<TestModuleFileExtension>(Ext.get()))
2487       GenerateArg(Args, OPT_ftest_module_file_extension_EQ, TestExt->str(), SA);
2488 
2489   if (!Opts.CodeCompletionAt.FileName.empty())
2490     GenerateArg(Args, OPT_code_completion_at, Opts.CodeCompletionAt.ToString(),
2491                 SA);
2492 
2493   for (const auto &Plugin : Opts.Plugins)
2494     GenerateArg(Args, OPT_load, Plugin, SA);
2495 
2496   // ASTDumpDecls and ASTDumpAll already handled with ProgramAction.
2497 
2498   for (const auto &ModuleFile : Opts.ModuleFiles)
2499     GenerateArg(Args, OPT_fmodule_file, ModuleFile, SA);
2500 
2501   if (Opts.AuxTargetCPU.hasValue())
2502     GenerateArg(Args, OPT_aux_target_cpu, *Opts.AuxTargetCPU, SA);
2503 
2504   if (Opts.AuxTargetFeatures.hasValue())
2505     for (const auto &Feature : *Opts.AuxTargetFeatures)
2506       GenerateArg(Args, OPT_aux_target_feature, Feature, SA);
2507 
2508   {
2509     StringRef Preprocessed = Opts.DashX.isPreprocessed() ? "-cpp-output" : "";
2510     StringRef ModuleMap =
2511         Opts.DashX.getFormat() == InputKind::ModuleMap ? "-module-map" : "";
2512     StringRef Header = IsHeader ? "-header" : "";
2513 
2514     StringRef Lang;
2515     switch (Opts.DashX.getLanguage()) {
2516     case Language::C:
2517       Lang = "c";
2518       break;
2519     case Language::OpenCL:
2520       Lang = "cl";
2521       break;
2522     case Language::OpenCLCXX:
2523       Lang = "clcpp";
2524       break;
2525     case Language::CUDA:
2526       Lang = "cuda";
2527       break;
2528     case Language::HIP:
2529       Lang = "hip";
2530       break;
2531     case Language::CXX:
2532       Lang = "c++";
2533       break;
2534     case Language::ObjC:
2535       Lang = "objective-c";
2536       break;
2537     case Language::ObjCXX:
2538       Lang = "objective-c++";
2539       break;
2540     case Language::RenderScript:
2541       Lang = "renderscript";
2542       break;
2543     case Language::Asm:
2544       Lang = "assembler-with-cpp";
2545       break;
2546     case Language::Unknown:
2547       assert(Opts.DashX.getFormat() == InputKind::Precompiled &&
2548              "Generating -x argument for unknown language (not precompiled).");
2549       Lang = "ast";
2550       break;
2551     case Language::LLVM_IR:
2552       Lang = "ir";
2553       break;
2554     }
2555 
2556     GenerateArg(Args, OPT_x, Lang + Header + ModuleMap + Preprocessed, SA);
2557   }
2558 
2559   // OPT_INPUT has a unique class, generate it directly.
2560   for (const auto &Input : Opts.Inputs)
2561     Args.push_back(SA(Input.getFile()));
2562 }
2563 
2564 static bool ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
2565                               DiagnosticsEngine &Diags, bool &IsHeaderFile) {
2566   unsigned NumErrorsBefore = Diags.getNumErrors();
2567 
2568   FrontendOptions &FrontendOpts = Opts;
2569 
2570 #define FRONTEND_OPTION_WITH_MARSHALLING(                                      \
2571     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2572     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2573     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2574     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2575   PARSE_OPTION_WITH_MARSHALLING(                                               \
2576       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2577       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2578 #include "clang/Driver/Options.inc"
2579 #undef FRONTEND_OPTION_WITH_MARSHALLING
2580 
2581   Opts.ProgramAction = frontend::ParseSyntaxOnly;
2582   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
2583     OptSpecifier Opt = OptSpecifier(A->getOption().getID());
2584     Optional<frontend::ActionKind> ProgramAction = getFrontendAction(Opt);
2585     assert(ProgramAction && "Option specifier not in Action_Group.");
2586 
2587     if (ProgramAction == frontend::ASTDump &&
2588         (Opt == OPT_ast_dump_all_EQ || Opt == OPT_ast_dump_EQ)) {
2589       unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
2590                          .CaseLower("default", ADOF_Default)
2591                          .CaseLower("json", ADOF_JSON)
2592                          .Default(std::numeric_limits<unsigned>::max());
2593 
2594       if (Val != std::numeric_limits<unsigned>::max())
2595         Opts.ASTDumpFormat = static_cast<ASTDumpOutputFormat>(Val);
2596       else {
2597         Diags.Report(diag::err_drv_invalid_value)
2598             << A->getAsString(Args) << A->getValue();
2599         Opts.ASTDumpFormat = ADOF_Default;
2600       }
2601     }
2602 
2603     if (ProgramAction == frontend::FixIt && Opt == OPT_fixit_EQ)
2604       Opts.FixItSuffix = A->getValue();
2605 
2606     if (ProgramAction == frontend::GenerateInterfaceStubs) {
2607       StringRef ArgStr =
2608           Args.hasArg(OPT_interface_stub_version_EQ)
2609               ? Args.getLastArgValue(OPT_interface_stub_version_EQ)
2610               : "experimental-ifs-v2";
2611       if (ArgStr == "experimental-yaml-elf-v1" ||
2612           ArgStr == "experimental-ifs-v1" ||
2613           ArgStr == "experimental-tapi-elf-v1") {
2614         std::string ErrorMessage =
2615             "Invalid interface stub format: " + ArgStr.str() +
2616             " is deprecated.";
2617         Diags.Report(diag::err_drv_invalid_value)
2618             << "Must specify a valid interface stub format type, ie: "
2619                "-interface-stub-version=experimental-ifs-v2"
2620             << ErrorMessage;
2621         ProgramAction = frontend::ParseSyntaxOnly;
2622       } else if (!ArgStr.startswith("experimental-ifs-")) {
2623         std::string ErrorMessage =
2624             "Invalid interface stub format: " + ArgStr.str() + ".";
2625         Diags.Report(diag::err_drv_invalid_value)
2626             << "Must specify a valid interface stub format type, ie: "
2627                "-interface-stub-version=experimental-ifs-v2"
2628             << ErrorMessage;
2629         ProgramAction = frontend::ParseSyntaxOnly;
2630       }
2631     }
2632 
2633     Opts.ProgramAction = *ProgramAction;
2634   }
2635 
2636   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
2637     Opts.Plugins.emplace_back(A->getValue(0));
2638     Opts.ProgramAction = frontend::PluginAction;
2639     Opts.ActionName = A->getValue();
2640   }
2641   for (const auto *AA : Args.filtered(OPT_plugin_arg))
2642     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
2643 
2644   for (const std::string &Arg :
2645          Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
2646     std::string BlockName;
2647     unsigned MajorVersion;
2648     unsigned MinorVersion;
2649     bool Hashed;
2650     std::string UserInfo;
2651     if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
2652                                         MinorVersion, Hashed, UserInfo)) {
2653       Diags.Report(diag::err_test_module_file_extension_format) << Arg;
2654 
2655       continue;
2656     }
2657 
2658     // Add the testing module file extension.
2659     Opts.ModuleFileExtensions.push_back(
2660         std::make_shared<TestModuleFileExtension>(
2661             BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
2662   }
2663 
2664   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
2665     Opts.CodeCompletionAt =
2666       ParsedSourceLocation::FromString(A->getValue());
2667     if (Opts.CodeCompletionAt.FileName.empty())
2668       Diags.Report(diag::err_drv_invalid_value)
2669         << A->getAsString(Args) << A->getValue();
2670   }
2671 
2672   Opts.Plugins = Args.getAllArgValues(OPT_load);
2673   Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump, OPT_ast_dump_EQ);
2674   Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all, OPT_ast_dump_all_EQ);
2675   // Only the -fmodule-file=<file> form.
2676   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2677     StringRef Val = A->getValue();
2678     if (Val.find('=') == StringRef::npos)
2679       Opts.ModuleFiles.push_back(std::string(Val));
2680   }
2681 
2682   if (Opts.ProgramAction != frontend::GenerateModule && Opts.IsSystemModule)
2683     Diags.Report(diag::err_drv_argument_only_allowed_with) << "-fsystem-module"
2684                                                            << "-emit-module";
2685 
2686   if (Args.hasArg(OPT_aux_target_cpu))
2687     Opts.AuxTargetCPU = std::string(Args.getLastArgValue(OPT_aux_target_cpu));
2688   if (Args.hasArg(OPT_aux_target_feature))
2689     Opts.AuxTargetFeatures = Args.getAllArgValues(OPT_aux_target_feature);
2690 
2691   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
2692       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
2693     Diags.Report(diag::err_drv_argument_not_allowed_with)
2694       << "ARC migration" << "ObjC migration";
2695   }
2696 
2697   InputKind DashX(Language::Unknown);
2698   if (const Arg *A = Args.getLastArg(OPT_x)) {
2699     StringRef XValue = A->getValue();
2700 
2701     // Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
2702     // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
2703     bool Preprocessed = XValue.consume_back("-cpp-output");
2704     bool ModuleMap = XValue.consume_back("-module-map");
2705     IsHeaderFile = !Preprocessed && !ModuleMap &&
2706                    XValue != "precompiled-header" &&
2707                    XValue.consume_back("-header");
2708 
2709     // Principal languages.
2710     DashX = llvm::StringSwitch<InputKind>(XValue)
2711                 .Case("c", Language::C)
2712                 .Case("cl", Language::OpenCL)
2713                 .Case("clcpp", Language::OpenCLCXX)
2714                 .Case("cuda", Language::CUDA)
2715                 .Case("hip", Language::HIP)
2716                 .Case("c++", Language::CXX)
2717                 .Case("objective-c", Language::ObjC)
2718                 .Case("objective-c++", Language::ObjCXX)
2719                 .Case("renderscript", Language::RenderScript)
2720                 .Default(Language::Unknown);
2721 
2722     // "objc[++]-cpp-output" is an acceptable synonym for
2723     // "objective-c[++]-cpp-output".
2724     if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
2725       DashX = llvm::StringSwitch<InputKind>(XValue)
2726                   .Case("objc", Language::ObjC)
2727                   .Case("objc++", Language::ObjCXX)
2728                   .Default(Language::Unknown);
2729 
2730     // Some special cases cannot be combined with suffixes.
2731     if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
2732       DashX = llvm::StringSwitch<InputKind>(XValue)
2733                   .Case("cpp-output", InputKind(Language::C).getPreprocessed())
2734                   .Case("assembler-with-cpp", Language::Asm)
2735                   .Cases("ast", "pcm", "precompiled-header",
2736                          InputKind(Language::Unknown, InputKind::Precompiled))
2737                   .Case("ir", Language::LLVM_IR)
2738                   .Default(Language::Unknown);
2739 
2740     if (DashX.isUnknown())
2741       Diags.Report(diag::err_drv_invalid_value)
2742         << A->getAsString(Args) << A->getValue();
2743 
2744     if (Preprocessed)
2745       DashX = DashX.getPreprocessed();
2746     if (ModuleMap)
2747       DashX = DashX.withFormat(InputKind::ModuleMap);
2748   }
2749 
2750   // '-' is the default input if none is given.
2751   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
2752   Opts.Inputs.clear();
2753   if (Inputs.empty())
2754     Inputs.push_back("-");
2755   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
2756     InputKind IK = DashX;
2757     if (IK.isUnknown()) {
2758       IK = FrontendOptions::getInputKindForExtension(
2759         StringRef(Inputs[i]).rsplit('.').second);
2760       // FIXME: Warn on this?
2761       if (IK.isUnknown())
2762         IK = Language::C;
2763       // FIXME: Remove this hack.
2764       if (i == 0)
2765         DashX = IK;
2766     }
2767 
2768     bool IsSystem = false;
2769 
2770     // The -emit-module action implicitly takes a module map.
2771     if (Opts.ProgramAction == frontend::GenerateModule &&
2772         IK.getFormat() == InputKind::Source) {
2773       IK = IK.withFormat(InputKind::ModuleMap);
2774       IsSystem = Opts.IsSystemModule;
2775     }
2776 
2777     Opts.Inputs.emplace_back(std::move(Inputs[i]), IK, IsSystem);
2778   }
2779 
2780   Opts.DashX = DashX;
2781 
2782   return Diags.getNumErrors() == NumErrorsBefore;
2783 }
2784 
2785 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
2786                                                  void *MainAddr) {
2787   std::string ClangExecutable =
2788       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
2789   return Driver::GetResourcesPath(ClangExecutable, CLANG_RESOURCE_DIR);
2790 }
2791 
2792 static void GenerateHeaderSearchArgs(HeaderSearchOptions &Opts,
2793                                      SmallVectorImpl<const char *> &Args,
2794                                      CompilerInvocation::StringAllocator SA) {
2795   const HeaderSearchOptions *HeaderSearchOpts = &Opts;
2796 #define HEADER_SEARCH_OPTION_WITH_MARSHALLING(                                 \
2797     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2798     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2799     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2800     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2801   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2802       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2803       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2804 #include "clang/Driver/Options.inc"
2805 #undef HEADER_SEARCH_OPTION_WITH_MARSHALLING
2806 
2807   if (Opts.UseLibcxx)
2808     GenerateArg(Args, OPT_stdlib_EQ, "libc++", SA);
2809 
2810   if (!Opts.ModuleCachePath.empty())
2811     GenerateArg(Args, OPT_fmodules_cache_path, Opts.ModuleCachePath, SA);
2812 
2813   for (const auto &File : Opts.PrebuiltModuleFiles)
2814     GenerateArg(Args, OPT_fmodule_file, File.first + "=" + File.second, SA);
2815 
2816   for (const auto &Path : Opts.PrebuiltModulePaths)
2817     GenerateArg(Args, OPT_fprebuilt_module_path, Path, SA);
2818 
2819   for (const auto &Macro : Opts.ModulesIgnoreMacros)
2820     GenerateArg(Args, OPT_fmodules_ignore_macro, Macro.val(), SA);
2821 
2822   auto Matches = [](const HeaderSearchOptions::Entry &Entry,
2823                     llvm::ArrayRef<frontend::IncludeDirGroup> Groups,
2824                     llvm::Optional<bool> IsFramework,
2825                     llvm::Optional<bool> IgnoreSysRoot) {
2826     return llvm::find(Groups, Entry.Group) != Groups.end() &&
2827            (!IsFramework || (Entry.IsFramework == *IsFramework)) &&
2828            (!IgnoreSysRoot || (Entry.IgnoreSysRoot == *IgnoreSysRoot));
2829   };
2830 
2831   auto It = Opts.UserEntries.begin();
2832   auto End = Opts.UserEntries.end();
2833 
2834   // Add -I..., -F..., and -index-header-map options in order.
2835   for (; It < End &&
2836          Matches(*It, {frontend::IndexHeaderMap, frontend::Angled}, None, true);
2837        ++It) {
2838     OptSpecifier Opt = [It, Matches]() {
2839       if (Matches(*It, frontend::IndexHeaderMap, true, true))
2840         return OPT_F;
2841       if (Matches(*It, frontend::IndexHeaderMap, false, true))
2842         return OPT_I;
2843       if (Matches(*It, frontend::Angled, true, true))
2844         return OPT_F;
2845       if (Matches(*It, frontend::Angled, false, true))
2846         return OPT_I;
2847       llvm_unreachable("Unexpected HeaderSearchOptions::Entry.");
2848     }();
2849 
2850     if (It->Group == frontend::IndexHeaderMap)
2851       GenerateArg(Args, OPT_index_header_map, SA);
2852     GenerateArg(Args, Opt, It->Path, SA);
2853   };
2854 
2855   // Note: some paths that came from "[-iprefix=xx] -iwithprefixbefore=yy" may
2856   // have already been generated as "-I[xx]yy". If that's the case, their
2857   // position on command line was such that this has no semantic impact on
2858   // include paths.
2859   for (; It < End &&
2860          Matches(*It, {frontend::After, frontend::Angled}, false, true);
2861        ++It) {
2862     OptSpecifier Opt =
2863         It->Group == frontend::After ? OPT_iwithprefix : OPT_iwithprefixbefore;
2864     GenerateArg(Args, Opt, It->Path, SA);
2865   }
2866 
2867   // Note: Some paths that came from "-idirafter=xxyy" may have already been
2868   // generated as "-iwithprefix=xxyy". If that's the case, their position on
2869   // command line was such that this has no semantic impact on include paths.
2870   for (; It < End && Matches(*It, {frontend::After}, false, true); ++It)
2871     GenerateArg(Args, OPT_idirafter, It->Path, SA);
2872   for (; It < End && Matches(*It, {frontend::Quoted}, false, true); ++It)
2873     GenerateArg(Args, OPT_iquote, It->Path, SA);
2874   for (; It < End && Matches(*It, {frontend::System}, false, None); ++It)
2875     GenerateArg(Args, It->IgnoreSysRoot ? OPT_isystem : OPT_iwithsysroot,
2876                 It->Path, SA);
2877   for (; It < End && Matches(*It, {frontend::System}, true, true); ++It)
2878     GenerateArg(Args, OPT_iframework, It->Path, SA);
2879   for (; It < End && Matches(*It, {frontend::System}, true, false); ++It)
2880     GenerateArg(Args, OPT_iframeworkwithsysroot, It->Path, SA);
2881 
2882   // Add the paths for the various language specific isystem flags.
2883   for (; It < End && Matches(*It, {frontend::CSystem}, false, true); ++It)
2884     GenerateArg(Args, OPT_c_isystem, It->Path, SA);
2885   for (; It < End && Matches(*It, {frontend::CXXSystem}, false, true); ++It)
2886     GenerateArg(Args, OPT_cxx_isystem, It->Path, SA);
2887   for (; It < End && Matches(*It, {frontend::ObjCSystem}, false, true); ++It)
2888     GenerateArg(Args, OPT_objc_isystem, It->Path, SA);
2889   for (; It < End && Matches(*It, {frontend::ObjCXXSystem}, false, true); ++It)
2890     GenerateArg(Args, OPT_objcxx_isystem, It->Path, SA);
2891 
2892   // Add the internal paths from a driver that detects standard include paths.
2893   // Note: Some paths that came from "-internal-isystem" arguments may have
2894   // already been generated as "-isystem". If that's the case, their position on
2895   // command line was such that this has no semantic impact on include paths.
2896   for (; It < End &&
2897          Matches(*It, {frontend::System, frontend::ExternCSystem}, false, true);
2898        ++It) {
2899     OptSpecifier Opt = It->Group == frontend::System
2900                            ? OPT_internal_isystem
2901                            : OPT_internal_externc_isystem;
2902     GenerateArg(Args, Opt, It->Path, SA);
2903   }
2904 
2905   assert(It == End && "Unhandled HeaderSearchOption::Entry.");
2906 
2907   // Add the path prefixes which are implicitly treated as being system headers.
2908   for (const auto &P : Opts.SystemHeaderPrefixes) {
2909     OptSpecifier Opt = P.IsSystemHeader ? OPT_system_header_prefix
2910                                         : OPT_no_system_header_prefix;
2911     GenerateArg(Args, Opt, P.Prefix, SA);
2912   }
2913 
2914   for (const std::string &F : Opts.VFSOverlayFiles)
2915     GenerateArg(Args, OPT_ivfsoverlay, F, SA);
2916 }
2917 
2918 static bool ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
2919                                   DiagnosticsEngine &Diags,
2920                                   const std::string &WorkingDir) {
2921   unsigned NumErrorsBefore = Diags.getNumErrors();
2922 
2923   HeaderSearchOptions *HeaderSearchOpts = &Opts;
2924 
2925 #define HEADER_SEARCH_OPTION_WITH_MARSHALLING(                                 \
2926     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2927     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2928     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2929     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2930   PARSE_OPTION_WITH_MARSHALLING(                                               \
2931       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2932       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2933 #include "clang/Driver/Options.inc"
2934 #undef HEADER_SEARCH_OPTION_WITH_MARSHALLING
2935 
2936   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
2937     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
2938 
2939   // Canonicalize -fmodules-cache-path before storing it.
2940   SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
2941   if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
2942     if (WorkingDir.empty())
2943       llvm::sys::fs::make_absolute(P);
2944     else
2945       llvm::sys::fs::make_absolute(WorkingDir, P);
2946   }
2947   llvm::sys::path::remove_dots(P);
2948   Opts.ModuleCachePath = std::string(P.str());
2949 
2950   // Only the -fmodule-file=<name>=<file> form.
2951   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2952     StringRef Val = A->getValue();
2953     if (Val.find('=') != StringRef::npos){
2954       auto Split = Val.split('=');
2955       Opts.PrebuiltModuleFiles.insert(
2956           {std::string(Split.first), std::string(Split.second)});
2957     }
2958   }
2959   for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
2960     Opts.AddPrebuiltModulePath(A->getValue());
2961 
2962   for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
2963     StringRef MacroDef = A->getValue();
2964     Opts.ModulesIgnoreMacros.insert(
2965         llvm::CachedHashString(MacroDef.split('=').first));
2966   }
2967 
2968   // Add -I..., -F..., and -index-header-map options in order.
2969   bool IsIndexHeaderMap = false;
2970   bool IsSysrootSpecified =
2971       Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
2972   for (const auto *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
2973     if (A->getOption().matches(OPT_index_header_map)) {
2974       // -index-header-map applies to the next -I or -F.
2975       IsIndexHeaderMap = true;
2976       continue;
2977     }
2978 
2979     frontend::IncludeDirGroup Group =
2980         IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
2981 
2982     bool IsFramework = A->getOption().matches(OPT_F);
2983     std::string Path = A->getValue();
2984 
2985     if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
2986       SmallString<32> Buffer;
2987       llvm::sys::path::append(Buffer, Opts.Sysroot,
2988                               llvm::StringRef(A->getValue()).substr(1));
2989       Path = std::string(Buffer.str());
2990     }
2991 
2992     Opts.AddPath(Path, Group, IsFramework,
2993                  /*IgnoreSysroot*/ true);
2994     IsIndexHeaderMap = false;
2995   }
2996 
2997   // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
2998   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
2999   for (const auto *A :
3000        Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
3001     if (A->getOption().matches(OPT_iprefix))
3002       Prefix = A->getValue();
3003     else if (A->getOption().matches(OPT_iwithprefix))
3004       Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
3005     else
3006       Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
3007   }
3008 
3009   for (const auto *A : Args.filtered(OPT_idirafter))
3010     Opts.AddPath(A->getValue(), frontend::After, false, true);
3011   for (const auto *A : Args.filtered(OPT_iquote))
3012     Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
3013   for (const auto *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
3014     Opts.AddPath(A->getValue(), frontend::System, false,
3015                  !A->getOption().matches(OPT_iwithsysroot));
3016   for (const auto *A : Args.filtered(OPT_iframework))
3017     Opts.AddPath(A->getValue(), frontend::System, true, true);
3018   for (const auto *A : Args.filtered(OPT_iframeworkwithsysroot))
3019     Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
3020                  /*IgnoreSysRoot=*/false);
3021 
3022   // Add the paths for the various language specific isystem flags.
3023   for (const auto *A : Args.filtered(OPT_c_isystem))
3024     Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
3025   for (const auto *A : Args.filtered(OPT_cxx_isystem))
3026     Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
3027   for (const auto *A : Args.filtered(OPT_objc_isystem))
3028     Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
3029   for (const auto *A : Args.filtered(OPT_objcxx_isystem))
3030     Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
3031 
3032   // Add the internal paths from a driver that detects standard include paths.
3033   for (const auto *A :
3034        Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
3035     frontend::IncludeDirGroup Group = frontend::System;
3036     if (A->getOption().matches(OPT_internal_externc_isystem))
3037       Group = frontend::ExternCSystem;
3038     Opts.AddPath(A->getValue(), Group, false, true);
3039   }
3040 
3041   // Add the path prefixes which are implicitly treated as being system headers.
3042   for (const auto *A :
3043        Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
3044     Opts.AddSystemHeaderPrefix(
3045         A->getValue(), A->getOption().matches(OPT_system_header_prefix));
3046 
3047   for (const auto *A : Args.filtered(OPT_ivfsoverlay))
3048     Opts.AddVFSOverlayFile(A->getValue());
3049 
3050   return Diags.getNumErrors() == NumErrorsBefore;
3051 }
3052 
3053 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
3054                                          const llvm::Triple &T,
3055                                          std::vector<std::string> &Includes,
3056                                          LangStandard::Kind LangStd) {
3057   // Set some properties which depend solely on the input kind; it would be nice
3058   // to move these to the language standard, and have the driver resolve the
3059   // input kind + language standard.
3060   //
3061   // FIXME: Perhaps a better model would be for a single source file to have
3062   // multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
3063   // simultaneously active?
3064   if (IK.getLanguage() == Language::Asm) {
3065     Opts.AsmPreprocessor = 1;
3066   } else if (IK.isObjectiveC()) {
3067     Opts.ObjC = 1;
3068   }
3069 
3070   if (LangStd == LangStandard::lang_unspecified) {
3071     // Based on the base language, pick one.
3072     switch (IK.getLanguage()) {
3073     case Language::Unknown:
3074     case Language::LLVM_IR:
3075       llvm_unreachable("Invalid input kind!");
3076     case Language::OpenCL:
3077       LangStd = LangStandard::lang_opencl10;
3078       break;
3079     case Language::OpenCLCXX:
3080       LangStd = LangStandard::lang_openclcpp;
3081       break;
3082     case Language::CUDA:
3083       LangStd = LangStandard::lang_cuda;
3084       break;
3085     case Language::Asm:
3086     case Language::C:
3087 #if defined(CLANG_DEFAULT_STD_C)
3088       LangStd = CLANG_DEFAULT_STD_C;
3089 #else
3090       // The PS4 uses C99 as the default C standard.
3091       if (T.isPS4())
3092         LangStd = LangStandard::lang_gnu99;
3093       else
3094         LangStd = LangStandard::lang_gnu17;
3095 #endif
3096       break;
3097     case Language::ObjC:
3098 #if defined(CLANG_DEFAULT_STD_C)
3099       LangStd = CLANG_DEFAULT_STD_C;
3100 #else
3101       LangStd = LangStandard::lang_gnu11;
3102 #endif
3103       break;
3104     case Language::CXX:
3105     case Language::ObjCXX:
3106 #if defined(CLANG_DEFAULT_STD_CXX)
3107       LangStd = CLANG_DEFAULT_STD_CXX;
3108 #else
3109       LangStd = LangStandard::lang_gnucxx14;
3110 #endif
3111       break;
3112     case Language::RenderScript:
3113       LangStd = LangStandard::lang_c99;
3114       break;
3115     case Language::HIP:
3116       LangStd = LangStandard::lang_hip;
3117       break;
3118     }
3119   }
3120 
3121   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
3122   Opts.LangStd = LangStd;
3123   Opts.LineComment = Std.hasLineComments();
3124   Opts.C99 = Std.isC99();
3125   Opts.C11 = Std.isC11();
3126   Opts.C17 = Std.isC17();
3127   Opts.C2x = Std.isC2x();
3128   Opts.CPlusPlus = Std.isCPlusPlus();
3129   Opts.CPlusPlus11 = Std.isCPlusPlus11();
3130   Opts.CPlusPlus14 = Std.isCPlusPlus14();
3131   Opts.CPlusPlus17 = Std.isCPlusPlus17();
3132   Opts.CPlusPlus20 = Std.isCPlusPlus20();
3133   Opts.CPlusPlus2b = Std.isCPlusPlus2b();
3134   Opts.GNUMode = Std.isGNUMode();
3135   Opts.GNUCVersion = 0;
3136   Opts.HexFloats = Std.hasHexFloats();
3137   Opts.ImplicitInt = Std.hasImplicitInt();
3138 
3139   Opts.CPlusPlusModules = Opts.CPlusPlus20;
3140 
3141   // Set OpenCL Version.
3142   Opts.OpenCL = Std.isOpenCL();
3143   if (LangStd == LangStandard::lang_opencl10)
3144     Opts.OpenCLVersion = 100;
3145   else if (LangStd == LangStandard::lang_opencl11)
3146     Opts.OpenCLVersion = 110;
3147   else if (LangStd == LangStandard::lang_opencl12)
3148     Opts.OpenCLVersion = 120;
3149   else if (LangStd == LangStandard::lang_opencl20)
3150     Opts.OpenCLVersion = 200;
3151   else if (LangStd == LangStandard::lang_opencl30)
3152     Opts.OpenCLVersion = 300;
3153   else if (LangStd == LangStandard::lang_openclcpp)
3154     Opts.OpenCLCPlusPlusVersion = 100;
3155 
3156   // OpenCL has some additional defaults.
3157   if (Opts.OpenCL) {
3158     Opts.AltiVec = 0;
3159     Opts.ZVector = 0;
3160     Opts.setDefaultFPContractMode(LangOptions::FPM_On);
3161     Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
3162     Opts.OpenCLPipe = Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
3163     Opts.OpenCLGenericAddressSpace =
3164         Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
3165 
3166     // Include default header file for OpenCL.
3167     if (Opts.IncludeDefaultHeader) {
3168       if (Opts.DeclareOpenCLBuiltins) {
3169         // Only include base header file for builtin types and constants.
3170         Includes.push_back("opencl-c-base.h");
3171       } else {
3172         Includes.push_back("opencl-c.h");
3173       }
3174     }
3175   }
3176 
3177   Opts.HIP = IK.getLanguage() == Language::HIP;
3178   Opts.CUDA = IK.getLanguage() == Language::CUDA || Opts.HIP;
3179   if (Opts.HIP) {
3180     // HIP toolchain does not support 'Fast' FPOpFusion in backends since it
3181     // fuses multiplication/addition instructions without contract flag from
3182     // device library functions in LLVM bitcode, which causes accuracy loss in
3183     // certain math functions, e.g. tan(-1e20) becomes -0.933 instead of 0.8446.
3184     // For device library functions in bitcode to work, 'Strict' or 'Standard'
3185     // FPOpFusion options in backends is needed. Therefore 'fast-honor-pragmas'
3186     // FP contract option is used to allow fuse across statements in frontend
3187     // whereas respecting contract flag in backend.
3188     Opts.setDefaultFPContractMode(LangOptions::FPM_FastHonorPragmas);
3189   } else if (Opts.CUDA) {
3190     // Allow fuse across statements disregarding pragmas.
3191     Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3192   }
3193 
3194   Opts.RenderScript = IK.getLanguage() == Language::RenderScript;
3195 
3196   // OpenCL and C++ both have bool, true, false keywords.
3197   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
3198 
3199   // OpenCL has half keyword
3200   Opts.Half = Opts.OpenCL;
3201 }
3202 
3203 /// Check if input file kind and language standard are compatible.
3204 static bool IsInputCompatibleWithStandard(InputKind IK,
3205                                           const LangStandard &S) {
3206   switch (IK.getLanguage()) {
3207   case Language::Unknown:
3208   case Language::LLVM_IR:
3209     llvm_unreachable("should not parse language flags for this input");
3210 
3211   case Language::C:
3212   case Language::ObjC:
3213   case Language::RenderScript:
3214     return S.getLanguage() == Language::C;
3215 
3216   case Language::OpenCL:
3217     return S.getLanguage() == Language::OpenCL ||
3218            S.getLanguage() == Language::OpenCLCXX;
3219 
3220   case Language::OpenCLCXX:
3221     return S.getLanguage() == Language::OpenCLCXX;
3222 
3223   case Language::CXX:
3224   case Language::ObjCXX:
3225     return S.getLanguage() == Language::CXX;
3226 
3227   case Language::CUDA:
3228     // FIXME: What -std= values should be permitted for CUDA compilations?
3229     return S.getLanguage() == Language::CUDA ||
3230            S.getLanguage() == Language::CXX;
3231 
3232   case Language::HIP:
3233     return S.getLanguage() == Language::CXX || S.getLanguage() == Language::HIP;
3234 
3235   case Language::Asm:
3236     // Accept (and ignore) all -std= values.
3237     // FIXME: The -std= value is not ignored; it affects the tokenization
3238     // and preprocessing rules if we're preprocessing this asm input.
3239     return true;
3240   }
3241 
3242   llvm_unreachable("unexpected input language");
3243 }
3244 
3245 /// Get language name for given input kind.
3246 static const StringRef GetInputKindName(InputKind IK) {
3247   switch (IK.getLanguage()) {
3248   case Language::C:
3249     return "C";
3250   case Language::ObjC:
3251     return "Objective-C";
3252   case Language::CXX:
3253     return "C++";
3254   case Language::ObjCXX:
3255     return "Objective-C++";
3256   case Language::OpenCL:
3257     return "OpenCL";
3258   case Language::OpenCLCXX:
3259     return "C++ for OpenCL";
3260   case Language::CUDA:
3261     return "CUDA";
3262   case Language::RenderScript:
3263     return "RenderScript";
3264   case Language::HIP:
3265     return "HIP";
3266 
3267   case Language::Asm:
3268     return "Asm";
3269   case Language::LLVM_IR:
3270     return "LLVM IR";
3271 
3272   case Language::Unknown:
3273     break;
3274   }
3275   llvm_unreachable("unknown input language");
3276 }
3277 
3278 void CompilerInvocation::GenerateLangArgs(const LangOptions &Opts,
3279                                           SmallVectorImpl<const char *> &Args,
3280                                           StringAllocator SA,
3281                                           const llvm::Triple &T, InputKind IK) {
3282   if (IK.getFormat() == InputKind::Precompiled ||
3283       IK.getLanguage() == Language::LLVM_IR) {
3284     if (Opts.ObjCAutoRefCount)
3285       GenerateArg(Args, OPT_fobjc_arc, SA);
3286     if (Opts.PICLevel != 0)
3287       GenerateArg(Args, OPT_pic_level, Twine(Opts.PICLevel), SA);
3288     if (Opts.PIE)
3289       GenerateArg(Args, OPT_pic_is_pie, SA);
3290     for (StringRef Sanitizer : serializeSanitizerKinds(Opts.Sanitize))
3291       GenerateArg(Args, OPT_fsanitize_EQ, Sanitizer, SA);
3292 
3293     return;
3294   }
3295 
3296   OptSpecifier StdOpt;
3297   switch (Opts.LangStd) {
3298   case LangStandard::lang_opencl10:
3299   case LangStandard::lang_opencl11:
3300   case LangStandard::lang_opencl12:
3301   case LangStandard::lang_opencl20:
3302   case LangStandard::lang_opencl30:
3303   case LangStandard::lang_openclcpp:
3304     StdOpt = OPT_cl_std_EQ;
3305     break;
3306   default:
3307     StdOpt = OPT_std_EQ;
3308     break;
3309   }
3310 
3311   auto LangStandard = LangStandard::getLangStandardForKind(Opts.LangStd);
3312   GenerateArg(Args, StdOpt, LangStandard.getName(), SA);
3313 
3314   if (Opts.IncludeDefaultHeader)
3315     GenerateArg(Args, OPT_finclude_default_header, SA);
3316   if (Opts.DeclareOpenCLBuiltins)
3317     GenerateArg(Args, OPT_fdeclare_opencl_builtins, SA);
3318 
3319   const LangOptions *LangOpts = &Opts;
3320 
3321 #define LANG_OPTION_WITH_MARSHALLING(                                          \
3322     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3323     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3324     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3325     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3326   GENERATE_OPTION_WITH_MARSHALLING(                                            \
3327       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
3328       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
3329 #include "clang/Driver/Options.inc"
3330 #undef LANG_OPTION_WITH_MARSHALLING
3331 
3332   // The '-fcf-protection=' option is generated by CodeGenOpts generator.
3333 
3334   if (Opts.ObjC) {
3335     GenerateArg(Args, OPT_fobjc_runtime_EQ, Opts.ObjCRuntime.getAsString(), SA);
3336 
3337     if (Opts.GC == LangOptions::GCOnly)
3338       GenerateArg(Args, OPT_fobjc_gc_only, SA);
3339     else if (Opts.GC == LangOptions::HybridGC)
3340       GenerateArg(Args, OPT_fobjc_gc, SA);
3341     else if (Opts.ObjCAutoRefCount == 1)
3342       GenerateArg(Args, OPT_fobjc_arc, SA);
3343 
3344     if (Opts.ObjCWeakRuntime)
3345       GenerateArg(Args, OPT_fobjc_runtime_has_weak, SA);
3346 
3347     if (Opts.ObjCWeak)
3348       GenerateArg(Args, OPT_fobjc_weak, SA);
3349 
3350     if (Opts.ObjCSubscriptingLegacyRuntime)
3351       GenerateArg(Args, OPT_fobjc_subscripting_legacy_runtime, SA);
3352   }
3353 
3354   if (Opts.GNUCVersion != 0) {
3355     unsigned Major = Opts.GNUCVersion / 100 / 100;
3356     unsigned Minor = (Opts.GNUCVersion / 100) % 100;
3357     unsigned Patch = Opts.GNUCVersion % 100;
3358     GenerateArg(Args, OPT_fgnuc_version_EQ,
3359                 Twine(Major) + "." + Twine(Minor) + "." + Twine(Patch), SA);
3360   }
3361 
3362   if (Opts.IgnoreXCOFFVisibility)
3363     GenerateArg(Args, OPT_mignore_xcoff_visibility, SA);
3364 
3365   if (Opts.SignedOverflowBehavior == LangOptions::SOB_Trapping) {
3366     GenerateArg(Args, OPT_ftrapv, SA);
3367     GenerateArg(Args, OPT_ftrapv_handler, Opts.OverflowHandler, SA);
3368   } else if (Opts.SignedOverflowBehavior == LangOptions::SOB_Defined) {
3369     GenerateArg(Args, OPT_fwrapv, SA);
3370   }
3371 
3372   if (Opts.MSCompatibilityVersion != 0) {
3373     unsigned Major = Opts.MSCompatibilityVersion / 10000000;
3374     unsigned Minor = (Opts.MSCompatibilityVersion / 100000) % 100;
3375     unsigned Subminor = Opts.MSCompatibilityVersion % 100000;
3376     GenerateArg(Args, OPT_fms_compatibility_version,
3377                 Twine(Major) + "." + Twine(Minor) + "." + Twine(Subminor), SA);
3378   }
3379 
3380   if ((!Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17) || T.isOSzOS()) {
3381     if (!Opts.Trigraphs)
3382       GenerateArg(Args, OPT_fno_trigraphs, SA);
3383   } else {
3384     if (Opts.Trigraphs)
3385       GenerateArg(Args, OPT_ftrigraphs, SA);
3386   }
3387 
3388   if (Opts.Blocks && !(Opts.OpenCL && Opts.OpenCLVersion == 200))
3389     GenerateArg(Args, OPT_fblocks, SA);
3390 
3391   if (Opts.ConvergentFunctions &&
3392       !(Opts.OpenCL || (Opts.CUDA && Opts.CUDAIsDevice) || Opts.SYCLIsDevice))
3393     GenerateArg(Args, OPT_fconvergent_functions, SA);
3394 
3395   if (Opts.NoBuiltin && !Opts.Freestanding)
3396     GenerateArg(Args, OPT_fno_builtin, SA);
3397 
3398   if (!Opts.NoBuiltin)
3399     for (const auto &Func : Opts.NoBuiltinFuncs)
3400       GenerateArg(Args, OPT_fno_builtin_, Func, SA);
3401 
3402   if (Opts.LongDoubleSize == 128)
3403     GenerateArg(Args, OPT_mlong_double_128, SA);
3404   else if (Opts.LongDoubleSize == 64)
3405     GenerateArg(Args, OPT_mlong_double_64, SA);
3406 
3407   // Not generating '-mrtd', it's just an alias for '-fdefault-calling-conv='.
3408 
3409   // OpenMP was requested via '-fopenmp', not implied by '-fopenmp-simd' or
3410   // '-fopenmp-targets='.
3411   if (Opts.OpenMP && !Opts.OpenMPSimd) {
3412     GenerateArg(Args, OPT_fopenmp, SA);
3413 
3414     if (Opts.OpenMP != 50)
3415       GenerateArg(Args, OPT_fopenmp_version_EQ, Twine(Opts.OpenMP), SA);
3416 
3417     if (!Opts.OpenMPUseTLS)
3418       GenerateArg(Args, OPT_fnoopenmp_use_tls, SA);
3419 
3420     if (Opts.OpenMPIsDevice)
3421       GenerateArg(Args, OPT_fopenmp_is_device, SA);
3422 
3423     if (Opts.OpenMPIRBuilder)
3424       GenerateArg(Args, OPT_fopenmp_enable_irbuilder, SA);
3425   }
3426 
3427   if (Opts.OpenMPSimd) {
3428     GenerateArg(Args, OPT_fopenmp_simd, SA);
3429 
3430     if (Opts.OpenMP != 50)
3431       GenerateArg(Args, OPT_fopenmp_version_EQ, Twine(Opts.OpenMP), SA);
3432   }
3433 
3434   if (Opts.OpenMPCUDANumSMs != 0)
3435     GenerateArg(Args, OPT_fopenmp_cuda_number_of_sm_EQ,
3436                 Twine(Opts.OpenMPCUDANumSMs), SA);
3437 
3438   if (Opts.OpenMPCUDABlocksPerSM != 0)
3439     GenerateArg(Args, OPT_fopenmp_cuda_blocks_per_sm_EQ,
3440                 Twine(Opts.OpenMPCUDABlocksPerSM), SA);
3441 
3442   if (Opts.OpenMPCUDAReductionBufNum != 1024)
3443     GenerateArg(Args, OPT_fopenmp_cuda_teams_reduction_recs_num_EQ,
3444                 Twine(Opts.OpenMPCUDAReductionBufNum), SA);
3445 
3446   if (!Opts.OMPTargetTriples.empty()) {
3447     std::string Targets;
3448     llvm::raw_string_ostream OS(Targets);
3449     llvm::interleave(
3450         Opts.OMPTargetTriples, OS,
3451         [&OS](const llvm::Triple &T) { OS << T.str(); }, ",");
3452     GenerateArg(Args, OPT_fopenmp_targets_EQ, OS.str(), SA);
3453   }
3454 
3455   if (!Opts.OMPHostIRFile.empty())
3456     GenerateArg(Args, OPT_fopenmp_host_ir_file_path, Opts.OMPHostIRFile, SA);
3457 
3458   if (Opts.OpenMPCUDAMode)
3459     GenerateArg(Args, OPT_fopenmp_cuda_mode, SA);
3460 
3461   if (Opts.OpenMPCUDATargetParallel)
3462     GenerateArg(Args, OPT_fopenmp_cuda_parallel_target_regions, SA);
3463 
3464   if (Opts.OpenMPCUDAForceFullRuntime)
3465     GenerateArg(Args, OPT_fopenmp_cuda_force_full_runtime, SA);
3466 
3467   // The arguments used to set Optimize, OptimizeSize and NoInlineDefine are
3468   // generated from CodeGenOptions.
3469 
3470   if (Opts.DefaultFPContractMode == LangOptions::FPM_Fast)
3471     GenerateArg(Args, OPT_ffp_contract, "fast", SA);
3472   else if (Opts.DefaultFPContractMode == LangOptions::FPM_On)
3473     GenerateArg(Args, OPT_ffp_contract, "on", SA);
3474   else if (Opts.DefaultFPContractMode == LangOptions::FPM_Off)
3475     GenerateArg(Args, OPT_ffp_contract, "off", SA);
3476   else if (Opts.DefaultFPContractMode == LangOptions::FPM_FastHonorPragmas)
3477     GenerateArg(Args, OPT_ffp_contract, "fast-honor-pragmas", SA);
3478 
3479   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.Sanitize))
3480     GenerateArg(Args, OPT_fsanitize_EQ, Sanitizer, SA);
3481 
3482   // Conflating '-fsanitize-system-blacklist' and '-fsanitize-blacklist'.
3483   for (const std::string &F : Opts.NoSanitizeFiles)
3484     GenerateArg(Args, OPT_fsanitize_blacklist, F, SA);
3485 
3486   if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver3_8)
3487     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "3.8", SA);
3488   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver4)
3489     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "4.0", SA);
3490   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver6)
3491     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "6.0", SA);
3492   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver7)
3493     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "7.0", SA);
3494   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver9)
3495     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "9.0", SA);
3496   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver11)
3497     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "11.0", SA);
3498 
3499   if (Opts.getSignReturnAddressScope() ==
3500       LangOptions::SignReturnAddressScopeKind::All)
3501     GenerateArg(Args, OPT_msign_return_address_EQ, "all", SA);
3502   else if (Opts.getSignReturnAddressScope() ==
3503            LangOptions::SignReturnAddressScopeKind::NonLeaf)
3504     GenerateArg(Args, OPT_msign_return_address_EQ, "non-leaf", SA);
3505 
3506   if (Opts.getSignReturnAddressKey() ==
3507       LangOptions::SignReturnAddressKeyKind::BKey)
3508     GenerateArg(Args, OPT_msign_return_address_key_EQ, "b_key", SA);
3509 }
3510 
3511 bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
3512                                        InputKind IK, const llvm::Triple &T,
3513                                        std::vector<std::string> &Includes,
3514                                        DiagnosticsEngine &Diags) {
3515   unsigned NumErrorsBefore = Diags.getNumErrors();
3516 
3517   if (IK.getFormat() == InputKind::Precompiled ||
3518       IK.getLanguage() == Language::LLVM_IR) {
3519     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
3520     // PassManager in BackendUtil.cpp. They need to be initialized no matter
3521     // what the input type is.
3522     if (Args.hasArg(OPT_fobjc_arc))
3523       Opts.ObjCAutoRefCount = 1;
3524     // PICLevel and PIELevel are needed during code generation and this should
3525     // be set regardless of the input type.
3526     Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
3527     Opts.PIE = Args.hasArg(OPT_pic_is_pie);
3528     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3529                         Diags, Opts.Sanitize);
3530 
3531     return Diags.getNumErrors() == NumErrorsBefore;
3532   }
3533 
3534   // Other LangOpts are only initialized when the input is not AST or LLVM IR.
3535   // FIXME: Should we really be parsing this for an Language::Asm input?
3536 
3537   // FIXME: Cleanup per-file based stuff.
3538   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
3539   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
3540     LangStd = LangStandard::getLangKind(A->getValue());
3541     if (LangStd == LangStandard::lang_unspecified) {
3542       Diags.Report(diag::err_drv_invalid_value)
3543         << A->getAsString(Args) << A->getValue();
3544       // Report supported standards with short description.
3545       for (unsigned KindValue = 0;
3546            KindValue != LangStandard::lang_unspecified;
3547            ++KindValue) {
3548         const LangStandard &Std = LangStandard::getLangStandardForKind(
3549           static_cast<LangStandard::Kind>(KindValue));
3550         if (IsInputCompatibleWithStandard(IK, Std)) {
3551           auto Diag = Diags.Report(diag::note_drv_use_standard);
3552           Diag << Std.getName() << Std.getDescription();
3553           unsigned NumAliases = 0;
3554 #define LANGSTANDARD(id, name, lang, desc, features)
3555 #define LANGSTANDARD_ALIAS(id, alias) \
3556           if (KindValue == LangStandard::lang_##id) ++NumAliases;
3557 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
3558 #include "clang/Basic/LangStandards.def"
3559           Diag << NumAliases;
3560 #define LANGSTANDARD(id, name, lang, desc, features)
3561 #define LANGSTANDARD_ALIAS(id, alias) \
3562           if (KindValue == LangStandard::lang_##id) Diag << alias;
3563 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
3564 #include "clang/Basic/LangStandards.def"
3565         }
3566       }
3567     } else {
3568       // Valid standard, check to make sure language and standard are
3569       // compatible.
3570       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
3571       if (!IsInputCompatibleWithStandard(IK, Std)) {
3572         Diags.Report(diag::err_drv_argument_not_allowed_with)
3573           << A->getAsString(Args) << GetInputKindName(IK);
3574       }
3575     }
3576   }
3577 
3578   // -cl-std only applies for OpenCL language standards.
3579   // Override the -std option in this case.
3580   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
3581     LangStandard::Kind OpenCLLangStd
3582       = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
3583         .Cases("cl", "CL", LangStandard::lang_opencl10)
3584         .Cases("cl1.0", "CL1.0", LangStandard::lang_opencl10)
3585         .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
3586         .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
3587         .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
3588         .Cases("cl3.0", "CL3.0", LangStandard::lang_opencl30)
3589         .Cases("clc++", "CLC++", LangStandard::lang_openclcpp)
3590         .Default(LangStandard::lang_unspecified);
3591 
3592     if (OpenCLLangStd == LangStandard::lang_unspecified) {
3593       Diags.Report(diag::err_drv_invalid_value)
3594         << A->getAsString(Args) << A->getValue();
3595     }
3596     else
3597       LangStd = OpenCLLangStd;
3598   }
3599 
3600   // These need to be parsed now. They are used to set OpenCL defaults.
3601   Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
3602   Opts.DeclareOpenCLBuiltins = Args.hasArg(OPT_fdeclare_opencl_builtins);
3603 
3604   CompilerInvocation::setLangDefaults(Opts, IK, T, Includes, LangStd);
3605 
3606   // The key paths of codegen options defined in Options.td start with
3607   // "LangOpts->". Let's provide the expected variable name and type.
3608   LangOptions *LangOpts = &Opts;
3609 
3610 #define LANG_OPTION_WITH_MARSHALLING(                                          \
3611     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3612     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3613     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3614     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3615   PARSE_OPTION_WITH_MARSHALLING(                                               \
3616       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
3617       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
3618 #include "clang/Driver/Options.inc"
3619 #undef LANG_OPTION_WITH_MARSHALLING
3620 
3621   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
3622     StringRef Name = A->getValue();
3623     if (Name == "full" || Name == "branch") {
3624       Opts.CFProtectionBranch = 1;
3625     }
3626   }
3627 
3628   if (Opts.ObjC) {
3629     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
3630       StringRef value = arg->getValue();
3631       if (Opts.ObjCRuntime.tryParse(value))
3632         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
3633     }
3634 
3635     if (Args.hasArg(OPT_fobjc_gc_only))
3636       Opts.setGC(LangOptions::GCOnly);
3637     else if (Args.hasArg(OPT_fobjc_gc))
3638       Opts.setGC(LangOptions::HybridGC);
3639     else if (Args.hasArg(OPT_fobjc_arc)) {
3640       Opts.ObjCAutoRefCount = 1;
3641       if (!Opts.ObjCRuntime.allowsARC())
3642         Diags.Report(diag::err_arc_unsupported_on_runtime);
3643     }
3644 
3645     // ObjCWeakRuntime tracks whether the runtime supports __weak, not
3646     // whether the feature is actually enabled.  This is predominantly
3647     // determined by -fobjc-runtime, but we allow it to be overridden
3648     // from the command line for testing purposes.
3649     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
3650       Opts.ObjCWeakRuntime = 1;
3651     else
3652       Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
3653 
3654     // ObjCWeak determines whether __weak is actually enabled.
3655     // Note that we allow -fno-objc-weak to disable this even in ARC mode.
3656     if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
3657       if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
3658         assert(!Opts.ObjCWeak);
3659       } else if (Opts.getGC() != LangOptions::NonGC) {
3660         Diags.Report(diag::err_objc_weak_with_gc);
3661       } else if (!Opts.ObjCWeakRuntime) {
3662         Diags.Report(diag::err_objc_weak_unsupported);
3663       } else {
3664         Opts.ObjCWeak = 1;
3665       }
3666     } else if (Opts.ObjCAutoRefCount) {
3667       Opts.ObjCWeak = Opts.ObjCWeakRuntime;
3668     }
3669 
3670     if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
3671       Opts.ObjCSubscriptingLegacyRuntime =
3672         (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
3673   }
3674 
3675   if (Arg *A = Args.getLastArg(options::OPT_fgnuc_version_EQ)) {
3676     // Check that the version has 1 to 3 components and the minor and patch
3677     // versions fit in two decimal digits.
3678     VersionTuple GNUCVer;
3679     bool Invalid = GNUCVer.tryParse(A->getValue());
3680     unsigned Major = GNUCVer.getMajor();
3681     unsigned Minor = GNUCVer.getMinor().getValueOr(0);
3682     unsigned Patch = GNUCVer.getSubminor().getValueOr(0);
3683     if (Invalid || GNUCVer.getBuild() || Minor >= 100 || Patch >= 100) {
3684       Diags.Report(diag::err_drv_invalid_value)
3685           << A->getAsString(Args) << A->getValue();
3686     }
3687     Opts.GNUCVersion = Major * 100 * 100 + Minor * 100 + Patch;
3688   }
3689 
3690   // In AIX OS, the -mignore-xcoff-visibility is enable by default if there is
3691   // no -fvisibility=* option.
3692   // This is the reason why '-fvisibility' needs to be always generated:
3693   // its absence implies '-mignore-xcoff-visibility'.
3694   //
3695   // Suppose the original cc1 command line does contain '-fvisibility default':
3696   // '-mignore-xcoff-visibility' should not be implied.
3697   // * If '-fvisibility' is not generated (as most options with default values
3698   //   don't), its absence would imply '-mignore-xcoff-visibility'. This changes
3699   //   the command line semantics.
3700   // * If '-fvisibility' is generated regardless of its presence and value,
3701   //   '-mignore-xcoff-visibility' won't be implied and the command line
3702   //   semantics are kept intact.
3703   //
3704   // When the original cc1 command line does **not** contain '-fvisibility',
3705   // '-mignore-xcoff-visibility' is implied. The generated command line will
3706   // contain both '-fvisibility default' and '-mignore-xcoff-visibility' and
3707   // subsequent calls to `CreateFromArgs`/`generateCC1CommandLine` will always
3708   // produce the same arguments.
3709 
3710   if (T.isOSAIX() && (Args.hasArg(OPT_mignore_xcoff_visibility) ||
3711                       !Args.hasArg(OPT_fvisibility)))
3712     Opts.IgnoreXCOFFVisibility = 1;
3713 
3714   if (Args.hasArg(OPT_ftrapv)) {
3715     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
3716     // Set the handler, if one is specified.
3717     Opts.OverflowHandler =
3718         std::string(Args.getLastArgValue(OPT_ftrapv_handler));
3719   }
3720   else if (Args.hasArg(OPT_fwrapv))
3721     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
3722 
3723   Opts.MSCompatibilityVersion = 0;
3724   if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
3725     VersionTuple VT;
3726     if (VT.tryParse(A->getValue()))
3727       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
3728                                                 << A->getValue();
3729     Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
3730                                   VT.getMinor().getValueOr(0) * 100000 +
3731                                   VT.getSubminor().getValueOr(0);
3732   }
3733 
3734   // Mimicking gcc's behavior, trigraphs are only enabled if -trigraphs
3735   // is specified, or -std is set to a conforming mode.
3736   // Trigraphs are disabled by default in c++1z onwards.
3737   // For z/OS, trigraphs are enabled by default (without regard to the above).
3738   Opts.Trigraphs =
3739       (!Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17) || T.isOSzOS();
3740   Opts.Trigraphs =
3741       Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
3742 
3743   Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
3744     && Opts.OpenCLVersion == 200);
3745 
3746   Opts.ConvergentFunctions = Opts.OpenCL || (Opts.CUDA && Opts.CUDAIsDevice) ||
3747                              Opts.SYCLIsDevice ||
3748                              Args.hasArg(OPT_fconvergent_functions);
3749 
3750   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
3751   if (!Opts.NoBuiltin)
3752     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
3753   Opts.LongDoubleSize = Args.hasArg(OPT_mlong_double_128)
3754                             ? 128
3755                             : Args.hasArg(OPT_mlong_double_64) ? 64 : 0;
3756   if (Opts.FastRelaxedMath)
3757     Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3758   llvm::sort(Opts.ModuleFeatures);
3759 
3760   // -mrtd option
3761   if (Arg *A = Args.getLastArg(OPT_mrtd)) {
3762     if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
3763       Diags.Report(diag::err_drv_argument_not_allowed_with)
3764           << A->getSpelling() << "-fdefault-calling-conv";
3765     else {
3766       if (T.getArch() != llvm::Triple::x86)
3767         Diags.Report(diag::err_drv_argument_not_allowed_with)
3768             << A->getSpelling() << T.getTriple();
3769       else
3770         Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
3771     }
3772   }
3773 
3774   // Check if -fopenmp is specified and set default version to 5.0.
3775   Opts.OpenMP = Args.hasArg(OPT_fopenmp) ? 50 : 0;
3776   // Check if -fopenmp-simd is specified.
3777   bool IsSimdSpecified =
3778       Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
3779                    /*Default=*/false);
3780   Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
3781   Opts.OpenMPUseTLS =
3782       Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
3783   Opts.OpenMPIsDevice =
3784       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
3785   Opts.OpenMPIRBuilder =
3786       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_enable_irbuilder);
3787   bool IsTargetSpecified =
3788       Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
3789 
3790   Opts.ConvergentFunctions = Opts.ConvergentFunctions || Opts.OpenMPIsDevice;
3791 
3792   if (Opts.OpenMP || Opts.OpenMPSimd) {
3793     if (int Version = getLastArgIntValue(
3794             Args, OPT_fopenmp_version_EQ,
3795             (IsSimdSpecified || IsTargetSpecified) ? 50 : Opts.OpenMP, Diags))
3796       Opts.OpenMP = Version;
3797     // Provide diagnostic when a given target is not expected to be an OpenMP
3798     // device or host.
3799     if (!Opts.OpenMPIsDevice) {
3800       switch (T.getArch()) {
3801       default:
3802         break;
3803       // Add unsupported host targets here:
3804       case llvm::Triple::nvptx:
3805       case llvm::Triple::nvptx64:
3806         Diags.Report(diag::err_drv_omp_host_target_not_supported) << T.str();
3807         break;
3808       }
3809     }
3810   }
3811 
3812   // Set the flag to prevent the implementation from emitting device exception
3813   // handling code for those requiring so.
3814   if ((Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN())) ||
3815       Opts.OpenCLCPlusPlus) {
3816     Opts.Exceptions = 0;
3817     Opts.CXXExceptions = 0;
3818   }
3819   if (Opts.OpenMPIsDevice && T.isNVPTX()) {
3820     Opts.OpenMPCUDANumSMs =
3821         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_number_of_sm_EQ,
3822                            Opts.OpenMPCUDANumSMs, Diags);
3823     Opts.OpenMPCUDABlocksPerSM =
3824         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_blocks_per_sm_EQ,
3825                            Opts.OpenMPCUDABlocksPerSM, Diags);
3826     Opts.OpenMPCUDAReductionBufNum = getLastArgIntValue(
3827         Args, options::OPT_fopenmp_cuda_teams_reduction_recs_num_EQ,
3828         Opts.OpenMPCUDAReductionBufNum, Diags);
3829   }
3830 
3831   // Get the OpenMP target triples if any.
3832   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
3833     enum ArchPtrSize { Arch16Bit, Arch32Bit, Arch64Bit };
3834     auto getArchPtrSize = [](const llvm::Triple &T) {
3835       if (T.isArch16Bit())
3836         return Arch16Bit;
3837       if (T.isArch32Bit())
3838         return Arch32Bit;
3839       assert(T.isArch64Bit() && "Expected 64-bit architecture");
3840       return Arch64Bit;
3841     };
3842 
3843     for (unsigned i = 0; i < A->getNumValues(); ++i) {
3844       llvm::Triple TT(A->getValue(i));
3845 
3846       if (TT.getArch() == llvm::Triple::UnknownArch ||
3847           !(TT.getArch() == llvm::Triple::aarch64 || TT.isPPC() ||
3848             TT.getArch() == llvm::Triple::nvptx ||
3849             TT.getArch() == llvm::Triple::nvptx64 ||
3850             TT.getArch() == llvm::Triple::amdgcn ||
3851             TT.getArch() == llvm::Triple::x86 ||
3852             TT.getArch() == llvm::Triple::x86_64))
3853         Diags.Report(diag::err_drv_invalid_omp_target) << A->getValue(i);
3854       else if (getArchPtrSize(T) != getArchPtrSize(TT))
3855         Diags.Report(diag::err_drv_incompatible_omp_arch)
3856             << A->getValue(i) << T.str();
3857       else
3858         Opts.OMPTargetTriples.push_back(TT);
3859     }
3860   }
3861 
3862   // Get OpenMP host file path if any and report if a non existent file is
3863   // found
3864   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
3865     Opts.OMPHostIRFile = A->getValue();
3866     if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
3867       Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
3868           << Opts.OMPHostIRFile;
3869   }
3870 
3871   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
3872   Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3873                         Args.hasArg(options::OPT_fopenmp_cuda_mode);
3874 
3875   // Set CUDA support for parallel execution of target regions for OpenMP target
3876   // NVPTX/AMDGCN if specified in options.
3877   Opts.OpenMPCUDATargetParallel =
3878       Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3879       Args.hasArg(options::OPT_fopenmp_cuda_parallel_target_regions);
3880 
3881   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
3882   Opts.OpenMPCUDAForceFullRuntime =
3883       Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3884       Args.hasArg(options::OPT_fopenmp_cuda_force_full_runtime);
3885 
3886   // FIXME: Eliminate this dependency.
3887   unsigned Opt = getOptimizationLevel(Args, IK, Diags),
3888        OptSize = getOptimizationLevelSize(Args);
3889   Opts.Optimize = Opt != 0;
3890   Opts.OptimizeSize = OptSize != 0;
3891 
3892   // This is the __NO_INLINE__ define, which just depends on things like the
3893   // optimization level and -fno-inline, not actually whether the backend has
3894   // inlining enabled.
3895   Opts.NoInlineDefine = !Opts.Optimize;
3896   if (Arg *InlineArg = Args.getLastArg(
3897           options::OPT_finline_functions, options::OPT_finline_hint_functions,
3898           options::OPT_fno_inline_functions, options::OPT_fno_inline))
3899     if (InlineArg->getOption().matches(options::OPT_fno_inline))
3900       Opts.NoInlineDefine = true;
3901 
3902   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
3903     StringRef Val = A->getValue();
3904     if (Val == "fast")
3905       Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3906     else if (Val == "on")
3907       Opts.setDefaultFPContractMode(LangOptions::FPM_On);
3908     else if (Val == "off")
3909       Opts.setDefaultFPContractMode(LangOptions::FPM_Off);
3910     else if (Val == "fast-honor-pragmas")
3911       Opts.setDefaultFPContractMode(LangOptions::FPM_FastHonorPragmas);
3912     else
3913       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
3914   }
3915 
3916   // Parse -fsanitize= arguments.
3917   parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3918                       Diags, Opts.Sanitize);
3919   Opts.NoSanitizeFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
3920   std::vector<std::string> systemBlacklists =
3921       Args.getAllArgValues(OPT_fsanitize_system_blacklist);
3922   Opts.NoSanitizeFiles.insert(Opts.NoSanitizeFiles.end(),
3923                               systemBlacklists.begin(), systemBlacklists.end());
3924 
3925   if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
3926     Opts.setClangABICompat(LangOptions::ClangABI::Latest);
3927 
3928     StringRef Ver = A->getValue();
3929     std::pair<StringRef, StringRef> VerParts = Ver.split('.');
3930     unsigned Major, Minor = 0;
3931 
3932     // Check the version number is valid: either 3.x (0 <= x <= 9) or
3933     // y or y.0 (4 <= y <= current version).
3934     if (!VerParts.first.startswith("0") &&
3935         !VerParts.first.getAsInteger(10, Major) &&
3936         3 <= Major && Major <= CLANG_VERSION_MAJOR &&
3937         (Major == 3 ? VerParts.second.size() == 1 &&
3938                       !VerParts.second.getAsInteger(10, Minor)
3939                     : VerParts.first.size() == Ver.size() ||
3940                       VerParts.second == "0")) {
3941       // Got a valid version number.
3942       if (Major == 3 && Minor <= 8)
3943         Opts.setClangABICompat(LangOptions::ClangABI::Ver3_8);
3944       else if (Major <= 4)
3945         Opts.setClangABICompat(LangOptions::ClangABI::Ver4);
3946       else if (Major <= 6)
3947         Opts.setClangABICompat(LangOptions::ClangABI::Ver6);
3948       else if (Major <= 7)
3949         Opts.setClangABICompat(LangOptions::ClangABI::Ver7);
3950       else if (Major <= 9)
3951         Opts.setClangABICompat(LangOptions::ClangABI::Ver9);
3952       else if (Major <= 11)
3953         Opts.setClangABICompat(LangOptions::ClangABI::Ver11);
3954     } else if (Ver != "latest") {
3955       Diags.Report(diag::err_drv_invalid_value)
3956           << A->getAsString(Args) << A->getValue();
3957     }
3958   }
3959 
3960   if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
3961     StringRef SignScope = A->getValue();
3962 
3963     if (SignScope.equals_lower("none"))
3964       Opts.setSignReturnAddressScope(
3965           LangOptions::SignReturnAddressScopeKind::None);
3966     else if (SignScope.equals_lower("all"))
3967       Opts.setSignReturnAddressScope(
3968           LangOptions::SignReturnAddressScopeKind::All);
3969     else if (SignScope.equals_lower("non-leaf"))
3970       Opts.setSignReturnAddressScope(
3971           LangOptions::SignReturnAddressScopeKind::NonLeaf);
3972     else
3973       Diags.Report(diag::err_drv_invalid_value)
3974           << A->getAsString(Args) << SignScope;
3975 
3976     if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
3977       StringRef SignKey = A->getValue();
3978       if (!SignScope.empty() && !SignKey.empty()) {
3979         if (SignKey.equals_lower("a_key"))
3980           Opts.setSignReturnAddressKey(
3981               LangOptions::SignReturnAddressKeyKind::AKey);
3982         else if (SignKey.equals_lower("b_key"))
3983           Opts.setSignReturnAddressKey(
3984               LangOptions::SignReturnAddressKeyKind::BKey);
3985         else
3986           Diags.Report(diag::err_drv_invalid_value)
3987               << A->getAsString(Args) << SignKey;
3988       }
3989     }
3990   }
3991 
3992   return Diags.getNumErrors() == NumErrorsBefore;
3993 }
3994 
3995 static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
3996   switch (Action) {
3997   case frontend::ASTDeclList:
3998   case frontend::ASTDump:
3999   case frontend::ASTPrint:
4000   case frontend::ASTView:
4001   case frontend::EmitAssembly:
4002   case frontend::EmitBC:
4003   case frontend::EmitHTML:
4004   case frontend::EmitLLVM:
4005   case frontend::EmitLLVMOnly:
4006   case frontend::EmitCodeGenOnly:
4007   case frontend::EmitObj:
4008   case frontend::FixIt:
4009   case frontend::GenerateModule:
4010   case frontend::GenerateModuleInterface:
4011   case frontend::GenerateHeaderModule:
4012   case frontend::GeneratePCH:
4013   case frontend::GenerateInterfaceStubs:
4014   case frontend::ParseSyntaxOnly:
4015   case frontend::ModuleFileInfo:
4016   case frontend::VerifyPCH:
4017   case frontend::PluginAction:
4018   case frontend::RewriteObjC:
4019   case frontend::RewriteTest:
4020   case frontend::RunAnalysis:
4021   case frontend::TemplightDump:
4022   case frontend::MigrateSource:
4023     return false;
4024 
4025   case frontend::DumpCompilerOptions:
4026   case frontend::DumpRawTokens:
4027   case frontend::DumpTokens:
4028   case frontend::InitOnly:
4029   case frontend::PrintPreamble:
4030   case frontend::PrintPreprocessedInput:
4031   case frontend::RewriteMacros:
4032   case frontend::RunPreprocessorOnly:
4033   case frontend::PrintDependencyDirectivesSourceMinimizerOutput:
4034     return true;
4035   }
4036   llvm_unreachable("invalid frontend action");
4037 }
4038 
4039 static void GeneratePreprocessorArgs(PreprocessorOptions &Opts,
4040                                      SmallVectorImpl<const char *> &Args,
4041                                      CompilerInvocation::StringAllocator SA,
4042                                      const LangOptions &LangOpts,
4043                                      const FrontendOptions &FrontendOpts,
4044                                      const CodeGenOptions &CodeGenOpts) {
4045   PreprocessorOptions *PreprocessorOpts = &Opts;
4046 
4047 #define PREPROCESSOR_OPTION_WITH_MARSHALLING(                                  \
4048     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4049     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4050     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4051     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4052   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4053       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4054       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4055 #include "clang/Driver/Options.inc"
4056 #undef PREPROCESSOR_OPTION_WITH_MARSHALLING
4057 
4058   if (Opts.PCHWithHdrStop && !Opts.PCHWithHdrStopCreate)
4059     GenerateArg(Args, OPT_pch_through_hdrstop_use, SA);
4060 
4061   for (const auto &D : Opts.DeserializedPCHDeclsToErrorOn)
4062     GenerateArg(Args, OPT_error_on_deserialized_pch_decl, D, SA);
4063 
4064   for (const auto &MP : Opts.MacroPrefixMap)
4065     GenerateArg(Args, OPT_fmacro_prefix_map_EQ, MP.first + "=" + MP.second, SA);
4066 
4067   if (Opts.PrecompiledPreambleBytes != std::make_pair(0u, false))
4068     GenerateArg(Args, OPT_preamble_bytes_EQ,
4069                 Twine(Opts.PrecompiledPreambleBytes.first) + "," +
4070                     (Opts.PrecompiledPreambleBytes.second ? "1" : "0"),
4071                 SA);
4072 
4073   for (const auto &M : Opts.Macros) {
4074     // Don't generate __CET__ macro definitions. They are implied by the
4075     // -fcf-protection option that is generated elsewhere.
4076     if (M.first == "__CET__=1" && !M.second &&
4077         !CodeGenOpts.CFProtectionReturn && CodeGenOpts.CFProtectionBranch)
4078       continue;
4079     if (M.first == "__CET__=2" && !M.second && CodeGenOpts.CFProtectionReturn &&
4080         !CodeGenOpts.CFProtectionBranch)
4081       continue;
4082     if (M.first == "__CET__=3" && !M.second && CodeGenOpts.CFProtectionReturn &&
4083         CodeGenOpts.CFProtectionBranch)
4084       continue;
4085 
4086     GenerateArg(Args, M.second ? OPT_U : OPT_D, M.first, SA);
4087   }
4088 
4089   for (const auto &I : Opts.Includes) {
4090     // Don't generate OpenCL includes. They are implied by other flags that are
4091     // generated elsewhere.
4092     if (LangOpts.OpenCL && LangOpts.IncludeDefaultHeader &&
4093         ((LangOpts.DeclareOpenCLBuiltins && I == "opencl-c-base.h") ||
4094          I == "opencl-c.h"))
4095       continue;
4096 
4097     GenerateArg(Args, OPT_include, I, SA);
4098   }
4099 
4100   for (const auto &CI : Opts.ChainedIncludes)
4101     GenerateArg(Args, OPT_chain_include, CI, SA);
4102 
4103   for (const auto &RF : Opts.RemappedFiles)
4104     GenerateArg(Args, OPT_remap_file, RF.first + ";" + RF.second, SA);
4105 
4106   // Don't handle LexEditorPlaceholders. It is implied by the action that is
4107   // generated elsewhere.
4108 }
4109 
4110 static bool ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
4111                                   DiagnosticsEngine &Diags,
4112                                   frontend::ActionKind Action,
4113                                   const FrontendOptions &FrontendOpts) {
4114   unsigned NumErrorsBefore = Diags.getNumErrors();
4115 
4116   PreprocessorOptions *PreprocessorOpts = &Opts;
4117 
4118 #define PREPROCESSOR_OPTION_WITH_MARSHALLING(                                  \
4119     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4120     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4121     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4122     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4123   PARSE_OPTION_WITH_MARSHALLING(                                               \
4124       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4125       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4126 #include "clang/Driver/Options.inc"
4127 #undef PREPROCESSOR_OPTION_WITH_MARSHALLING
4128 
4129   Opts.PCHWithHdrStop = Args.hasArg(OPT_pch_through_hdrstop_create) ||
4130                         Args.hasArg(OPT_pch_through_hdrstop_use);
4131 
4132   for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
4133     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
4134 
4135   for (const auto &A : Args.getAllArgValues(OPT_fmacro_prefix_map_EQ)) {
4136     auto Split = StringRef(A).split('=');
4137     Opts.MacroPrefixMap.insert(
4138         {std::string(Split.first), std::string(Split.second)});
4139   }
4140 
4141   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
4142     StringRef Value(A->getValue());
4143     size_t Comma = Value.find(',');
4144     unsigned Bytes = 0;
4145     unsigned EndOfLine = 0;
4146 
4147     if (Comma == StringRef::npos ||
4148         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
4149         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
4150       Diags.Report(diag::err_drv_preamble_format);
4151     else {
4152       Opts.PrecompiledPreambleBytes.first = Bytes;
4153       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
4154     }
4155   }
4156 
4157   // Add the __CET__ macro if a CFProtection option is set.
4158   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
4159     StringRef Name = A->getValue();
4160     if (Name == "branch")
4161       Opts.addMacroDef("__CET__=1");
4162     else if (Name == "return")
4163       Opts.addMacroDef("__CET__=2");
4164     else if (Name == "full")
4165       Opts.addMacroDef("__CET__=3");
4166   }
4167 
4168   // Add macros from the command line.
4169   for (const auto *A : Args.filtered(OPT_D, OPT_U)) {
4170     if (A->getOption().matches(OPT_D))
4171       Opts.addMacroDef(A->getValue());
4172     else
4173       Opts.addMacroUndef(A->getValue());
4174   }
4175 
4176   // Add the ordered list of -includes.
4177   for (const auto *A : Args.filtered(OPT_include))
4178     Opts.Includes.emplace_back(A->getValue());
4179 
4180   for (const auto *A : Args.filtered(OPT_chain_include))
4181     Opts.ChainedIncludes.emplace_back(A->getValue());
4182 
4183   for (const auto *A : Args.filtered(OPT_remap_file)) {
4184     std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
4185 
4186     if (Split.second.empty()) {
4187       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
4188       continue;
4189     }
4190 
4191     Opts.addRemappedFile(Split.first, Split.second);
4192   }
4193 
4194   // Always avoid lexing editor placeholders when we're just running the
4195   // preprocessor as we never want to emit the
4196   // "editor placeholder in source file" error in PP only mode.
4197   if (isStrictlyPreprocessorAction(Action))
4198     Opts.LexEditorPlaceholders = false;
4199 
4200   return Diags.getNumErrors() == NumErrorsBefore;
4201 }
4202 
4203 static void GeneratePreprocessorOutputArgs(
4204     const PreprocessorOutputOptions &Opts, SmallVectorImpl<const char *> &Args,
4205     CompilerInvocation::StringAllocator SA, frontend::ActionKind Action) {
4206   const PreprocessorOutputOptions &PreprocessorOutputOpts = Opts;
4207 
4208 #define PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING(                           \
4209     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4210     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4211     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4212     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4213   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4214       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4215       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4216 #include "clang/Driver/Options.inc"
4217 #undef PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING
4218 
4219   bool Generate_dM = isStrictlyPreprocessorAction(Action) && !Opts.ShowCPP;
4220   if (Generate_dM)
4221     GenerateArg(Args, OPT_dM, SA);
4222   if (!Generate_dM && Opts.ShowMacros)
4223     GenerateArg(Args, OPT_dD, SA);
4224 }
4225 
4226 static bool ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
4227                                         ArgList &Args, DiagnosticsEngine &Diags,
4228                                         frontend::ActionKind Action) {
4229   unsigned NumErrorsBefore = Diags.getNumErrors();
4230 
4231   PreprocessorOutputOptions &PreprocessorOutputOpts = Opts;
4232 
4233 #define PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING(                           \
4234     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4235     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4236     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4237     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4238   PARSE_OPTION_WITH_MARSHALLING(                                               \
4239       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4240       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4241 #include "clang/Driver/Options.inc"
4242 #undef PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING
4243 
4244   Opts.ShowCPP = isStrictlyPreprocessorAction(Action) && !Args.hasArg(OPT_dM);
4245   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
4246 
4247   return Diags.getNumErrors() == NumErrorsBefore;
4248 }
4249 
4250 static void GenerateTargetArgs(const TargetOptions &Opts,
4251                                SmallVectorImpl<const char *> &Args,
4252                                CompilerInvocation::StringAllocator SA) {
4253   const TargetOptions *TargetOpts = &Opts;
4254 #define TARGET_OPTION_WITH_MARSHALLING(                                        \
4255     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4256     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4257     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4258     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4259   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4260       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4261       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4262 #include "clang/Driver/Options.inc"
4263 #undef TARGET_OPTION_WITH_MARSHALLING
4264 
4265   if (!Opts.SDKVersion.empty())
4266     GenerateArg(Args, OPT_target_sdk_version_EQ, Opts.SDKVersion.getAsString(),
4267                 SA);
4268 }
4269 
4270 static bool ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
4271                             DiagnosticsEngine &Diags) {
4272   unsigned NumErrorsBefore = Diags.getNumErrors();
4273 
4274   TargetOptions *TargetOpts = &Opts;
4275 
4276 #define TARGET_OPTION_WITH_MARSHALLING(                                        \
4277     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4278     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4279     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4280     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4281   PARSE_OPTION_WITH_MARSHALLING(                                               \
4282       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4283       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4284 #include "clang/Driver/Options.inc"
4285 #undef TARGET_OPTION_WITH_MARSHALLING
4286 
4287   if (Arg *A = Args.getLastArg(options::OPT_target_sdk_version_EQ)) {
4288     llvm::VersionTuple Version;
4289     if (Version.tryParse(A->getValue()))
4290       Diags.Report(diag::err_drv_invalid_value)
4291           << A->getAsString(Args) << A->getValue();
4292     else
4293       Opts.SDKVersion = Version;
4294   }
4295 
4296   return Diags.getNumErrors() == NumErrorsBefore;
4297 }
4298 
4299 bool CompilerInvocation::CreateFromArgsImpl(
4300     CompilerInvocation &Res, ArrayRef<const char *> CommandLineArgs,
4301     DiagnosticsEngine &Diags, const char *Argv0) {
4302   unsigned NumErrorsBefore = Diags.getNumErrors();
4303 
4304   // Parse the arguments.
4305   const OptTable &Opts = getDriverOptTable();
4306   const unsigned IncludedFlagsBitmask = options::CC1Option;
4307   unsigned MissingArgIndex, MissingArgCount;
4308   InputArgList Args = Opts.ParseArgs(CommandLineArgs, MissingArgIndex,
4309                                      MissingArgCount, IncludedFlagsBitmask);
4310   LangOptions &LangOpts = *Res.getLangOpts();
4311 
4312   // Check for missing argument error.
4313   if (MissingArgCount)
4314     Diags.Report(diag::err_drv_missing_argument)
4315         << Args.getArgString(MissingArgIndex) << MissingArgCount;
4316 
4317   // Issue errors on unknown arguments.
4318   for (const auto *A : Args.filtered(OPT_UNKNOWN)) {
4319     auto ArgString = A->getAsString(Args);
4320     std::string Nearest;
4321     if (Opts.findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
4322       Diags.Report(diag::err_drv_unknown_argument) << ArgString;
4323     else
4324       Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
4325           << ArgString << Nearest;
4326   }
4327 
4328   ParseFileSystemArgs(Res.getFileSystemOpts(), Args, Diags);
4329   ParseMigratorArgs(Res.getMigratorOpts(), Args, Diags);
4330   ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
4331   ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
4332                       /*DefaultDiagColor=*/false);
4333   ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags, LangOpts.IsHeaderFile);
4334   // FIXME: We shouldn't have to pass the DashX option around here
4335   InputKind DashX = Res.getFrontendOpts().DashX;
4336   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
4337   llvm::Triple T(Res.getTargetOpts().Triple);
4338   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args, Diags,
4339                         Res.getFileSystemOpts().WorkingDir);
4340 
4341   ParseLangArgs(LangOpts, Args, DashX, T, Res.getPreprocessorOpts().Includes,
4342                 Diags);
4343   if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
4344     LangOpts.ObjCExceptions = 1;
4345 
4346   if (LangOpts.CUDA) {
4347     // During CUDA device-side compilation, the aux triple is the
4348     // triple used for host compilation.
4349     if (LangOpts.CUDAIsDevice)
4350       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
4351   }
4352 
4353   // Set the triple of the host for OpenMP device compile.
4354   if (LangOpts.OpenMPIsDevice)
4355     Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
4356 
4357   ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags, T,
4358                    Res.getFrontendOpts().OutputFile, LangOpts);
4359 
4360   // FIXME: Override value name discarding when asan or msan is used because the
4361   // backend passes depend on the name of the alloca in order to print out
4362   // names.
4363   Res.getCodeGenOpts().DiscardValueNames &=
4364       !LangOpts.Sanitize.has(SanitizerKind::Address) &&
4365       !LangOpts.Sanitize.has(SanitizerKind::KernelAddress) &&
4366       !LangOpts.Sanitize.has(SanitizerKind::Memory) &&
4367       !LangOpts.Sanitize.has(SanitizerKind::KernelMemory);
4368 
4369   ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, Diags,
4370                         Res.getFrontendOpts().ProgramAction,
4371                         Res.getFrontendOpts());
4372   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args, Diags,
4373                               Res.getFrontendOpts().ProgramAction);
4374 
4375   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args, Diags,
4376                             Res.getFrontendOpts().ProgramAction,
4377                             Res.getPreprocessorOutputOpts().ShowLineMarkers);
4378   if (!Res.getDependencyOutputOpts().OutputFile.empty() &&
4379       Res.getDependencyOutputOpts().Targets.empty())
4380     Diags.Report(diag::err_fe_dependency_file_requires_MT);
4381 
4382   // If sanitizer is enabled, disable OPT_ffine_grained_bitfield_accesses.
4383   if (Res.getCodeGenOpts().FineGrainedBitfieldAccesses &&
4384       !Res.getLangOpts()->Sanitize.empty()) {
4385     Res.getCodeGenOpts().FineGrainedBitfieldAccesses = false;
4386     Diags.Report(diag::warn_drv_fine_grained_bitfield_accesses_ignored);
4387   }
4388 
4389   // Store the command-line for using in the CodeView backend.
4390   Res.getCodeGenOpts().Argv0 = Argv0;
4391   Res.getCodeGenOpts().CommandLineArgs = CommandLineArgs;
4392 
4393   FixupInvocation(Res, Diags, Args, DashX);
4394 
4395   return Diags.getNumErrors() == NumErrorsBefore;
4396 }
4397 
4398 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Invocation,
4399                                         ArrayRef<const char *> CommandLineArgs,
4400                                         DiagnosticsEngine &Diags,
4401                                         const char *Argv0) {
4402   CompilerInvocation DummyInvocation;
4403 
4404   return RoundTrip(
4405       [](CompilerInvocation &Invocation, ArrayRef<const char *> CommandLineArgs,
4406          DiagnosticsEngine &Diags, const char *Argv0) {
4407         return CreateFromArgsImpl(Invocation, CommandLineArgs, Diags, Argv0);
4408       },
4409       [](CompilerInvocation &Invocation, SmallVectorImpl<const char *> &Args,
4410          StringAllocator SA) { Invocation.generateCC1CommandLine(Args, SA); },
4411       Invocation, DummyInvocation, CommandLineArgs, Diags, Argv0);
4412 }
4413 
4414 std::string CompilerInvocation::getModuleHash() const {
4415   // Note: For QoI reasons, the things we use as a hash here should all be
4416   // dumped via the -module-info flag.
4417   using llvm::hash_code;
4418   using llvm::hash_value;
4419   using llvm::hash_combine;
4420   using llvm::hash_combine_range;
4421 
4422   // Start the signature with the compiler version.
4423   // FIXME: We'd rather use something more cryptographically sound than
4424   // CityHash, but this will do for now.
4425   hash_code code = hash_value(getClangFullRepositoryVersion());
4426 
4427   // Also include the serialization version, in case LLVM_APPEND_VC_REV is off
4428   // and getClangFullRepositoryVersion() doesn't include git revision.
4429   code = hash_combine(code, serialization::VERSION_MAJOR,
4430                       serialization::VERSION_MINOR);
4431 
4432   // Extend the signature with the language options
4433 #define LANGOPT(Name, Bits, Default, Description) \
4434    code = hash_combine(code, LangOpts->Name);
4435 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
4436   code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
4437 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
4438 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
4439 #include "clang/Basic/LangOptions.def"
4440 
4441   for (StringRef Feature : LangOpts->ModuleFeatures)
4442     code = hash_combine(code, Feature);
4443 
4444   code = hash_combine(code, LangOpts->ObjCRuntime);
4445   const auto &BCN = LangOpts->CommentOpts.BlockCommandNames;
4446   code = hash_combine(code, hash_combine_range(BCN.begin(), BCN.end()));
4447 
4448   // Extend the signature with the target options.
4449   code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
4450                       TargetOpts->TuneCPU, TargetOpts->ABI);
4451   for (const auto &FeatureAsWritten : TargetOpts->FeaturesAsWritten)
4452     code = hash_combine(code, FeatureAsWritten);
4453 
4454   // Extend the signature with preprocessor options.
4455   const PreprocessorOptions &ppOpts = getPreprocessorOpts();
4456   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
4457   code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
4458 
4459   for (const auto &I : getPreprocessorOpts().Macros) {
4460     // If we're supposed to ignore this macro for the purposes of modules,
4461     // don't put it into the hash.
4462     if (!hsOpts.ModulesIgnoreMacros.empty()) {
4463       // Check whether we're ignoring this macro.
4464       StringRef MacroDef = I.first;
4465       if (hsOpts.ModulesIgnoreMacros.count(
4466               llvm::CachedHashString(MacroDef.split('=').first)))
4467         continue;
4468     }
4469 
4470     code = hash_combine(code, I.first, I.second);
4471   }
4472 
4473   // Extend the signature with the sysroot and other header search options.
4474   code = hash_combine(code, hsOpts.Sysroot,
4475                       hsOpts.ModuleFormat,
4476                       hsOpts.UseDebugInfo,
4477                       hsOpts.UseBuiltinIncludes,
4478                       hsOpts.UseStandardSystemIncludes,
4479                       hsOpts.UseStandardCXXIncludes,
4480                       hsOpts.UseLibcxx,
4481                       hsOpts.ModulesValidateDiagnosticOptions);
4482   code = hash_combine(code, hsOpts.ResourceDir);
4483 
4484   if (hsOpts.ModulesStrictContextHash) {
4485     hash_code SHPC = hash_combine_range(hsOpts.SystemHeaderPrefixes.begin(),
4486                                         hsOpts.SystemHeaderPrefixes.end());
4487     hash_code UEC = hash_combine_range(hsOpts.UserEntries.begin(),
4488                                        hsOpts.UserEntries.end());
4489     code = hash_combine(code, hsOpts.SystemHeaderPrefixes.size(), SHPC,
4490                         hsOpts.UserEntries.size(), UEC);
4491 
4492     const DiagnosticOptions &diagOpts = getDiagnosticOpts();
4493     #define DIAGOPT(Name, Bits, Default) \
4494       code = hash_combine(code, diagOpts.Name);
4495     #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
4496       code = hash_combine(code, diagOpts.get##Name());
4497     #include "clang/Basic/DiagnosticOptions.def"
4498     #undef DIAGOPT
4499     #undef ENUM_DIAGOPT
4500   }
4501 
4502   // Extend the signature with the user build path.
4503   code = hash_combine(code, hsOpts.ModuleUserBuildPath);
4504 
4505   // Extend the signature with the module file extensions.
4506   const FrontendOptions &frontendOpts = getFrontendOpts();
4507   for (const auto &ext : frontendOpts.ModuleFileExtensions) {
4508     code = ext->hashExtension(code);
4509   }
4510 
4511   // When compiling with -gmodules, also hash -fdebug-prefix-map as it
4512   // affects the debug info in the PCM.
4513   if (getCodeGenOpts().DebugTypeExtRefs)
4514     for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
4515       code = hash_combine(code, KeyValue.first, KeyValue.second);
4516 
4517   // Extend the signature with the enabled sanitizers, if at least one is
4518   // enabled. Sanitizers which cannot affect AST generation aren't hashed.
4519   SanitizerSet SanHash = LangOpts->Sanitize;
4520   SanHash.clear(getPPTransparentSanitizers());
4521   if (!SanHash.empty())
4522     code = hash_combine(code, SanHash.Mask);
4523 
4524   return llvm::APInt(64, code).toString(36, /*Signed=*/false);
4525 }
4526 
4527 void CompilerInvocation::generateCC1CommandLine(
4528     SmallVectorImpl<const char *> &Args, StringAllocator SA) const {
4529   llvm::Triple T(TargetOpts->Triple);
4530 
4531   GenerateFileSystemArgs(FileSystemOpts, Args, SA);
4532   GenerateMigratorArgs(MigratorOpts, Args, SA);
4533   GenerateAnalyzerArgs(*AnalyzerOpts, Args, SA);
4534   GenerateDiagnosticArgs(*DiagnosticOpts, Args, SA, false);
4535   GenerateFrontendArgs(FrontendOpts, Args, SA, LangOpts->IsHeaderFile);
4536   GenerateTargetArgs(*TargetOpts, Args, SA);
4537   GenerateHeaderSearchArgs(*HeaderSearchOpts, Args, SA);
4538   GenerateLangArgs(*LangOpts, Args, SA, T, FrontendOpts.DashX);
4539   GenerateCodeGenArgs(CodeGenOpts, Args, SA, T, FrontendOpts.OutputFile,
4540                       &*LangOpts);
4541   GeneratePreprocessorArgs(*PreprocessorOpts, Args, SA, *LangOpts, FrontendOpts,
4542                            CodeGenOpts);
4543   GeneratePreprocessorOutputArgs(PreprocessorOutputOpts, Args, SA,
4544                                  FrontendOpts.ProgramAction);
4545   GenerateDependencyOutputArgs(DependencyOutputOpts, Args, SA);
4546 }
4547 
4548 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
4549 clang::createVFSFromCompilerInvocation(const CompilerInvocation &CI,
4550                                        DiagnosticsEngine &Diags) {
4551   return createVFSFromCompilerInvocation(CI, Diags,
4552                                          llvm::vfs::getRealFileSystem());
4553 }
4554 
4555 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
4556 clang::createVFSFromCompilerInvocation(
4557     const CompilerInvocation &CI, DiagnosticsEngine &Diags,
4558     IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
4559   if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
4560     return BaseFS;
4561 
4562   IntrusiveRefCntPtr<llvm::vfs::FileSystem> Result = BaseFS;
4563   // earlier vfs files are on the bottom
4564   for (const auto &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
4565     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
4566         Result->getBufferForFile(File);
4567     if (!Buffer) {
4568       Diags.Report(diag::err_missing_vfs_overlay_file) << File;
4569       continue;
4570     }
4571 
4572     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getVFSFromYAML(
4573         std::move(Buffer.get()), /*DiagHandler*/ nullptr, File,
4574         /*DiagContext*/ nullptr, Result);
4575     if (!FS) {
4576       Diags.Report(diag::err_invalid_vfs_overlay) << File;
4577       continue;
4578     }
4579 
4580     Result = FS;
4581   }
4582   return Result;
4583 }
4584