xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 671f0e2e189c561512511331d95de382e2d6d15d)
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() !=
467           LangOptions::ExceptionHandlingKind::None &&
468       T.isWindowsMSVCEnvironment())
469     Diags.Report(diag::err_fe_invalid_exception_model)
470         << static_cast<unsigned>(LangOpts.getExceptionHandling()) << T.str();
471 
472   if (LangOpts.AppleKext && !LangOpts.CPlusPlus)
473     Diags.Report(diag::warn_c_kext);
474 
475   if (Args.hasArg(OPT_fconcepts_ts))
476     Diags.Report(diag::warn_fe_concepts_ts_flag);
477 
478   if (LangOpts.NewAlignOverride &&
479       !llvm::isPowerOf2_32(LangOpts.NewAlignOverride)) {
480     Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
481     Diags.Report(diag::err_fe_invalid_alignment)
482         << A->getAsString(Args) << A->getValue();
483     LangOpts.NewAlignOverride = 0;
484   }
485 
486   // Prevent the user from specifying both -fsycl-is-device and -fsycl-is-host.
487   if (LangOpts.SYCLIsDevice && LangOpts.SYCLIsHost)
488     Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fsycl-is-device"
489                                                           << "-fsycl-is-host";
490 
491   if (Args.hasArg(OPT_fgnu89_inline) && LangOpts.CPlusPlus)
492     Diags.Report(diag::err_drv_argument_not_allowed_with)
493         << "-fgnu89-inline" << GetInputKindName(IK);
494 
495   if (Args.hasArg(OPT_fgpu_allow_device_init) && !LangOpts.HIP)
496     Diags.Report(diag::warn_ignored_hip_only_option)
497         << Args.getLastArg(OPT_fgpu_allow_device_init)->getAsString(Args);
498 
499   if (Args.hasArg(OPT_gpu_max_threads_per_block_EQ) && !LangOpts.HIP)
500     Diags.Report(diag::warn_ignored_hip_only_option)
501         << Args.getLastArg(OPT_gpu_max_threads_per_block_EQ)->getAsString(Args);
502 
503   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
504   // This option should be deprecated for CL > 1.0 because
505   // this option was added for compatibility with OpenCL 1.0.
506   if (Args.getLastArg(OPT_cl_strict_aliasing) && LangOpts.OpenCLVersion > 100)
507     Diags.Report(diag::warn_option_invalid_ocl_version)
508         << LangOpts.getOpenCLVersionTuple().getAsString()
509         << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
510 
511   if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
512     auto DefaultCC = LangOpts.getDefaultCallingConv();
513 
514     bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
515                       DefaultCC == LangOptions::DCC_StdCall) &&
516                      Arch != llvm::Triple::x86;
517     emitError |= (DefaultCC == LangOptions::DCC_VectorCall ||
518                   DefaultCC == LangOptions::DCC_RegCall) &&
519                  !T.isX86();
520     if (emitError)
521       Diags.Report(diag::err_drv_argument_not_allowed_with)
522           << A->getSpelling() << T.getTriple();
523   }
524 
525   if (!CodeGenOpts.ProfileRemappingFile.empty() && CodeGenOpts.LegacyPassManager)
526     Diags.Report(diag::err_drv_argument_only_allowed_with)
527         << Args.getLastArg(OPT_fprofile_remapping_file_EQ)->getAsString(Args)
528         << "-fno-legacy-pass-manager";
529 
530   return Diags.getNumErrors() == NumErrorsBefore;
531 }
532 
533 //===----------------------------------------------------------------------===//
534 // Deserialization (from args)
535 //===----------------------------------------------------------------------===//
536 
537 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
538                                      DiagnosticsEngine &Diags) {
539   unsigned DefaultOpt = llvm::CodeGenOpt::None;
540   if ((IK.getLanguage() == Language::OpenCL ||
541        IK.getLanguage() == Language::OpenCLCXX) &&
542       !Args.hasArg(OPT_cl_opt_disable))
543     DefaultOpt = llvm::CodeGenOpt::Default;
544 
545   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
546     if (A->getOption().matches(options::OPT_O0))
547       return llvm::CodeGenOpt::None;
548 
549     if (A->getOption().matches(options::OPT_Ofast))
550       return llvm::CodeGenOpt::Aggressive;
551 
552     assert(A->getOption().matches(options::OPT_O));
553 
554     StringRef S(A->getValue());
555     if (S == "s" || S == "z")
556       return llvm::CodeGenOpt::Default;
557 
558     if (S == "g")
559       return llvm::CodeGenOpt::Less;
560 
561     return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
562   }
563 
564   return DefaultOpt;
565 }
566 
567 static unsigned getOptimizationLevelSize(ArgList &Args) {
568   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
569     if (A->getOption().matches(options::OPT_O)) {
570       switch (A->getValue()[0]) {
571       default:
572         return 0;
573       case 's':
574         return 1;
575       case 'z':
576         return 2;
577       }
578     }
579   }
580   return 0;
581 }
582 
583 static void GenerateArg(SmallVectorImpl<const char *> &Args,
584                         llvm::opt::OptSpecifier OptSpecifier,
585                         CompilerInvocation::StringAllocator SA) {
586   Option Opt = getDriverOptTable().getOption(OptSpecifier);
587   denormalizeSimpleFlag(Args, SA(Opt.getPrefix() + Opt.getName()), SA,
588                         Option::OptionClass::FlagClass, 0);
589 }
590 
591 static void GenerateArg(SmallVectorImpl<const char *> &Args,
592                         llvm::opt::OptSpecifier OptSpecifier,
593                         const Twine &Value,
594                         CompilerInvocation::StringAllocator SA) {
595   Option Opt = getDriverOptTable().getOption(OptSpecifier);
596   denormalizeString(Args, SA(Opt.getPrefix() + Opt.getName()), SA,
597                     Opt.getKind(), 0, Value);
598 }
599 
600 // Parse command line arguments into CompilerInvocation.
601 using ParseFn =
602     llvm::function_ref<bool(CompilerInvocation &, ArrayRef<const char *>,
603                             DiagnosticsEngine &, const char *)>;
604 
605 // Generate command line arguments from CompilerInvocation.
606 using GenerateFn = llvm::function_ref<void(
607     CompilerInvocation &, SmallVectorImpl<const char *> &,
608     CompilerInvocation::StringAllocator)>;
609 
610 // May perform round-trip of command line arguments. By default, the round-trip
611 // is enabled if CLANG_ROUND_TRIP_CC1_ARGS was defined during build. This can be
612 // overwritten at run-time via the "-round-trip-args" and "-no-round-trip-args"
613 // command line flags.
614 // During round-trip, the command line arguments are parsed into a dummy
615 // instance of CompilerInvocation which is used to generate the command line
616 // arguments again. The real CompilerInvocation instance is then created by
617 // parsing the generated arguments, not the original ones.
618 static bool RoundTrip(ParseFn Parse, GenerateFn Generate,
619                       CompilerInvocation &RealInvocation,
620                       CompilerInvocation &DummyInvocation,
621                       ArrayRef<const char *> CommandLineArgs,
622                       DiagnosticsEngine &Diags, const char *Argv0) {
623   // FIXME: Switch to '#ifndef NDEBUG' when possible.
624 #ifdef CLANG_ROUND_TRIP_CC1_ARGS
625   bool DoRoundTripDefault = true;
626 #else
627   bool DoRoundTripDefault = false;
628 #endif
629 
630   bool DoRoundTrip = DoRoundTripDefault;
631   for (const auto *Arg : CommandLineArgs) {
632     if (Arg == StringRef("-round-trip-args"))
633       DoRoundTrip = true;
634     if (Arg == StringRef("-no-round-trip-args"))
635       DoRoundTrip = false;
636   }
637 
638   // If round-trip was not requested, simply run the parser with the real
639   // invocation diagnostics.
640   if (!DoRoundTrip)
641     return Parse(RealInvocation, CommandLineArgs, Diags, Argv0);
642 
643   // Serializes quoted (and potentially escaped) arguments.
644   auto SerializeArgs = [](ArrayRef<const char *> Args) {
645     std::string Buffer;
646     llvm::raw_string_ostream OS(Buffer);
647     for (const char *Arg : Args) {
648       llvm::sys::printArg(OS, Arg, /*Quote=*/true);
649       OS << ' ';
650     }
651     OS.flush();
652     return Buffer;
653   };
654 
655   // Setup a dummy DiagnosticsEngine.
656   DiagnosticsEngine DummyDiags(new DiagnosticIDs(), new DiagnosticOptions());
657   DummyDiags.setClient(new TextDiagnosticBuffer());
658 
659   // Run the first parse on the original arguments with the dummy invocation and
660   // diagnostics.
661   if (!Parse(DummyInvocation, CommandLineArgs, DummyDiags, Argv0) ||
662       DummyDiags.getNumWarnings() != 0) {
663     // If the first parse did not succeed, it must be user mistake (invalid
664     // command line arguments). We won't be able to generate arguments that
665     // would reproduce the same result. Let's fail again with the real
666     // invocation and diagnostics, so all side-effects of parsing are visible.
667     unsigned NumWarningsBefore = Diags.getNumWarnings();
668     auto Success = Parse(RealInvocation, CommandLineArgs, Diags, Argv0);
669     if (!Success || Diags.getNumWarnings() != NumWarningsBefore)
670       return Success;
671 
672     // Parse with original options and diagnostics succeeded even though it
673     // shouldn't have. Something is off.
674     Diags.Report(diag::err_cc1_round_trip_fail_then_ok);
675     Diags.Report(diag::note_cc1_round_trip_original)
676         << SerializeArgs(CommandLineArgs);
677     return false;
678   }
679 
680   // Setup string allocator.
681   llvm::BumpPtrAllocator Alloc;
682   llvm::StringSaver StringPool(Alloc);
683   auto SA = [&StringPool](const Twine &Arg) {
684     return StringPool.save(Arg).data();
685   };
686 
687   // Generate arguments from the dummy invocation. If Generate is the
688   // inverse of Parse, the newly generated arguments must have the same
689   // semantics as the original.
690   SmallVector<const char *> GeneratedArgs1;
691   Generate(DummyInvocation, GeneratedArgs1, SA);
692 
693   // Run the second parse, now on the generated arguments, and with the real
694   // invocation and diagnostics. The result is what we will end up using for the
695   // rest of compilation, so if Generate is not inverse of Parse, something down
696   // the line will break.
697   bool Success2 = Parse(RealInvocation, GeneratedArgs1, Diags, Argv0);
698 
699   // The first parse on original arguments succeeded, but second parse of
700   // generated arguments failed. Something must be wrong with the generator.
701   if (!Success2) {
702     Diags.Report(diag::err_cc1_round_trip_ok_then_fail);
703     Diags.Report(diag::note_cc1_round_trip_generated)
704         << 1 << SerializeArgs(GeneratedArgs1);
705     return false;
706   }
707 
708   // Generate arguments again, this time from the options we will end up using
709   // for the rest of the compilation.
710   SmallVector<const char *> GeneratedArgs2;
711   Generate(RealInvocation, GeneratedArgs2, SA);
712 
713   // Compares two lists of generated arguments.
714   auto Equal = [](const ArrayRef<const char *> A,
715                   const ArrayRef<const char *> B) {
716     return std::equal(A.begin(), A.end(), B.begin(), B.end(),
717                       [](const char *AElem, const char *BElem) {
718                         return StringRef(AElem) == StringRef(BElem);
719                       });
720   };
721 
722   // If we generated different arguments from what we assume are two
723   // semantically equivalent CompilerInvocations, the Generate function may
724   // be non-deterministic.
725   if (!Equal(GeneratedArgs1, GeneratedArgs2)) {
726     Diags.Report(diag::err_cc1_round_trip_mismatch);
727     Diags.Report(diag::note_cc1_round_trip_generated)
728         << 1 << SerializeArgs(GeneratedArgs1);
729     Diags.Report(diag::note_cc1_round_trip_generated)
730         << 2 << SerializeArgs(GeneratedArgs2);
731     return false;
732   }
733 
734   Diags.Report(diag::remark_cc1_round_trip_generated)
735       << 1 << SerializeArgs(GeneratedArgs1);
736   Diags.Report(diag::remark_cc1_round_trip_generated)
737       << 2 << SerializeArgs(GeneratedArgs2);
738 
739   return Success2;
740 }
741 
742 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
743                               OptSpecifier GroupWithValue,
744                               std::vector<std::string> &Diagnostics) {
745   for (auto *A : Args.filtered(Group)) {
746     if (A->getOption().getKind() == Option::FlagClass) {
747       // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
748       // its name (minus the "W" or "R" at the beginning) to the diagnostics.
749       Diagnostics.push_back(
750           std::string(A->getOption().getName().drop_front(1)));
751     } else if (A->getOption().matches(GroupWithValue)) {
752       // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic
753       // group. Add only the group name to the diagnostics.
754       Diagnostics.push_back(
755           std::string(A->getOption().getName().drop_front(1).rtrim("=-")));
756     } else {
757       // Otherwise, add its value (for OPT_W_Joined and similar).
758       Diagnostics.push_back(A->getValue());
759     }
760   }
761 }
762 
763 // Parse the Static Analyzer configuration. If \p Diags is set to nullptr,
764 // it won't verify the input.
765 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
766                                  DiagnosticsEngine *Diags);
767 
768 static void getAllNoBuiltinFuncValues(ArgList &Args,
769                                       std::vector<std::string> &Funcs) {
770   std::vector<std::string> Values = Args.getAllArgValues(OPT_fno_builtin_);
771   auto BuiltinEnd = llvm::partition(Values, [](const std::string FuncName) {
772     return Builtin::Context::isBuiltinFunc(FuncName);
773   });
774   Funcs.insert(Funcs.end(), Values.begin(), BuiltinEnd);
775 }
776 
777 static void GenerateAnalyzerArgs(AnalyzerOptions &Opts,
778                                  SmallVectorImpl<const char *> &Args,
779                                  CompilerInvocation::StringAllocator SA) {
780   const AnalyzerOptions *AnalyzerOpts = &Opts;
781 
782 #define ANALYZER_OPTION_WITH_MARSHALLING(                                      \
783     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
784     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
785     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
786     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
787   GENERATE_OPTION_WITH_MARSHALLING(                                            \
788       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
789       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
790 #include "clang/Driver/Options.inc"
791 #undef ANALYZER_OPTION_WITH_MARSHALLING
792 
793   if (Opts.AnalysisStoreOpt != RegionStoreModel) {
794     switch (Opts.AnalysisStoreOpt) {
795 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN)                           \
796   case NAME##Model:                                                            \
797     GenerateArg(Args, OPT_analyzer_store, CMDFLAG, SA);                        \
798     break;
799 #include "clang/StaticAnalyzer/Core/Analyses.def"
800     default:
801       llvm_unreachable("Tried to generate unknown analysis store.");
802     }
803   }
804 
805   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
806     switch (Opts.AnalysisConstraintsOpt) {
807 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN)                     \
808   case NAME##Model:                                                            \
809     GenerateArg(Args, OPT_analyzer_constraints, CMDFLAG, SA);                  \
810     break;
811 #include "clang/StaticAnalyzer/Core/Analyses.def"
812     default:
813       llvm_unreachable("Tried to generate unknown analysis constraint.");
814     }
815   }
816 
817   if (Opts.AnalysisDiagOpt != PD_HTML) {
818     switch (Opts.AnalysisDiagOpt) {
819 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN)                     \
820   case PD_##NAME:                                                              \
821     GenerateArg(Args, OPT_analyzer_output, CMDFLAG, SA);                       \
822     break;
823 #include "clang/StaticAnalyzer/Core/Analyses.def"
824     default:
825       llvm_unreachable("Tried to generate unknown analysis diagnostic client.");
826     }
827   }
828 
829   if (Opts.AnalysisPurgeOpt != PurgeStmt) {
830     switch (Opts.AnalysisPurgeOpt) {
831 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC)                                    \
832   case NAME:                                                                   \
833     GenerateArg(Args, OPT_analyzer_purge, CMDFLAG, SA);                        \
834     break;
835 #include "clang/StaticAnalyzer/Core/Analyses.def"
836     default:
837       llvm_unreachable("Tried to generate unknown analysis purge mode.");
838     }
839   }
840 
841   if (Opts.InliningMode != NoRedundancy) {
842     switch (Opts.InliningMode) {
843 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC)                            \
844   case NAME:                                                                   \
845     GenerateArg(Args, OPT_analyzer_inlining_mode, CMDFLAG, SA);                \
846     break;
847 #include "clang/StaticAnalyzer/Core/Analyses.def"
848     default:
849       llvm_unreachable("Tried to generate unknown analysis inlining mode.");
850     }
851   }
852 
853   for (const auto &CP : Opts.CheckersAndPackages) {
854     OptSpecifier Opt =
855         CP.second ? OPT_analyzer_checker : OPT_analyzer_disable_checker;
856     GenerateArg(Args, Opt, CP.first, SA);
857   }
858 
859   AnalyzerOptions ConfigOpts;
860   parseAnalyzerConfigs(ConfigOpts, nullptr);
861 
862   for (const auto &C : Opts.Config) {
863     // Don't generate anything that came from parseAnalyzerConfigs. It would be
864     // redundant and may not be valid on the command line.
865     auto Entry = ConfigOpts.Config.find(C.getKey());
866     if (Entry != ConfigOpts.Config.end() && Entry->getValue() == C.getValue())
867       continue;
868 
869     GenerateArg(Args, OPT_analyzer_config, C.getKey() + "=" + C.getValue(), SA);
870   }
871 
872   // Nothing to generate for FullCompilerInvocation.
873 }
874 
875 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
876                               DiagnosticsEngine &Diags) {
877   unsigned NumErrorsBefore = Diags.getNumErrors();
878 
879   AnalyzerOptions *AnalyzerOpts = &Opts;
880 
881 #define ANALYZER_OPTION_WITH_MARSHALLING(                                      \
882     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
883     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
884     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
885     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
886   PARSE_OPTION_WITH_MARSHALLING(                                               \
887       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
888       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
889 #include "clang/Driver/Options.inc"
890 #undef ANALYZER_OPTION_WITH_MARSHALLING
891 
892   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
893     StringRef Name = A->getValue();
894     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
895 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
896       .Case(CMDFLAG, NAME##Model)
897 #include "clang/StaticAnalyzer/Core/Analyses.def"
898       .Default(NumStores);
899     if (Value == NumStores) {
900       Diags.Report(diag::err_drv_invalid_value)
901         << A->getAsString(Args) << Name;
902     } else {
903       Opts.AnalysisStoreOpt = Value;
904     }
905   }
906 
907   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
908     StringRef Name = A->getValue();
909     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
910 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
911       .Case(CMDFLAG, NAME##Model)
912 #include "clang/StaticAnalyzer/Core/Analyses.def"
913       .Default(NumConstraints);
914     if (Value == NumConstraints) {
915       Diags.Report(diag::err_drv_invalid_value)
916         << A->getAsString(Args) << Name;
917     } else {
918       Opts.AnalysisConstraintsOpt = Value;
919     }
920   }
921 
922   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
923     StringRef Name = A->getValue();
924     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
925 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
926       .Case(CMDFLAG, PD_##NAME)
927 #include "clang/StaticAnalyzer/Core/Analyses.def"
928       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
929     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
930       Diags.Report(diag::err_drv_invalid_value)
931         << A->getAsString(Args) << Name;
932     } else {
933       Opts.AnalysisDiagOpt = Value;
934     }
935   }
936 
937   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
938     StringRef Name = A->getValue();
939     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
940 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
941       .Case(CMDFLAG, NAME)
942 #include "clang/StaticAnalyzer/Core/Analyses.def"
943       .Default(NumPurgeModes);
944     if (Value == NumPurgeModes) {
945       Diags.Report(diag::err_drv_invalid_value)
946         << A->getAsString(Args) << Name;
947     } else {
948       Opts.AnalysisPurgeOpt = Value;
949     }
950   }
951 
952   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
953     StringRef Name = A->getValue();
954     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
955 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
956       .Case(CMDFLAG, NAME)
957 #include "clang/StaticAnalyzer/Core/Analyses.def"
958       .Default(NumInliningModes);
959     if (Value == NumInliningModes) {
960       Diags.Report(diag::err_drv_invalid_value)
961         << A->getAsString(Args) << Name;
962     } else {
963       Opts.InliningMode = Value;
964     }
965   }
966 
967   Opts.CheckersAndPackages.clear();
968   for (const Arg *A :
969        Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
970     A->claim();
971     bool IsEnabled = A->getOption().getID() == OPT_analyzer_checker;
972     // We can have a list of comma separated checker names, e.g:
973     // '-analyzer-checker=cocoa,unix'
974     StringRef CheckerAndPackageList = A->getValue();
975     SmallVector<StringRef, 16> CheckersAndPackages;
976     CheckerAndPackageList.split(CheckersAndPackages, ",");
977     for (const StringRef &CheckerOrPackage : CheckersAndPackages)
978       Opts.CheckersAndPackages.emplace_back(std::string(CheckerOrPackage),
979                                             IsEnabled);
980   }
981 
982   // Go through the analyzer configuration options.
983   for (const auto *A : Args.filtered(OPT_analyzer_config)) {
984 
985     // We can have a list of comma separated config names, e.g:
986     // '-analyzer-config key1=val1,key2=val2'
987     StringRef configList = A->getValue();
988     SmallVector<StringRef, 4> configVals;
989     configList.split(configVals, ",");
990     for (const auto &configVal : configVals) {
991       StringRef key, val;
992       std::tie(key, val) = configVal.split("=");
993       if (val.empty()) {
994         Diags.Report(SourceLocation(),
995                      diag::err_analyzer_config_no_value) << configVal;
996         break;
997       }
998       if (val.find('=') != StringRef::npos) {
999         Diags.Report(SourceLocation(),
1000                      diag::err_analyzer_config_multiple_values)
1001           << configVal;
1002         break;
1003       }
1004 
1005       // TODO: Check checker options too, possibly in CheckerRegistry.
1006       // Leave unknown non-checker configs unclaimed.
1007       if (!key.contains(":") && Opts.isUnknownAnalyzerConfig(key)) {
1008         if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
1009           Diags.Report(diag::err_analyzer_config_unknown) << key;
1010         continue;
1011       }
1012 
1013       A->claim();
1014       Opts.Config[key] = std::string(val);
1015     }
1016   }
1017 
1018   if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
1019     parseAnalyzerConfigs(Opts, &Diags);
1020   else
1021     parseAnalyzerConfigs(Opts, nullptr);
1022 
1023   llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
1024   for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
1025     if (i != 0)
1026       os << " ";
1027     os << Args.getArgString(i);
1028   }
1029   os.flush();
1030 
1031   return Diags.getNumErrors() == NumErrorsBefore;
1032 }
1033 
1034 static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
1035                                  StringRef OptionName, StringRef DefaultVal) {
1036   return Config.insert({OptionName, std::string(DefaultVal)}).first->second;
1037 }
1038 
1039 static void initOption(AnalyzerOptions::ConfigTable &Config,
1040                        DiagnosticsEngine *Diags,
1041                        StringRef &OptionField, StringRef Name,
1042                        StringRef DefaultVal) {
1043   // String options may be known to invalid (e.g. if the expected string is a
1044   // file name, but the file does not exist), those will have to be checked in
1045   // parseConfigs.
1046   OptionField = getStringOption(Config, Name, DefaultVal);
1047 }
1048 
1049 static void initOption(AnalyzerOptions::ConfigTable &Config,
1050                        DiagnosticsEngine *Diags,
1051                        bool &OptionField, StringRef Name, bool DefaultVal) {
1052   auto PossiblyInvalidVal = llvm::StringSwitch<Optional<bool>>(
1053                  getStringOption(Config, Name, (DefaultVal ? "true" : "false")))
1054       .Case("true", true)
1055       .Case("false", false)
1056       .Default(None);
1057 
1058   if (!PossiblyInvalidVal) {
1059     if (Diags)
1060       Diags->Report(diag::err_analyzer_config_invalid_input)
1061         << Name << "a boolean";
1062     else
1063       OptionField = DefaultVal;
1064   } else
1065     OptionField = PossiblyInvalidVal.getValue();
1066 }
1067 
1068 static void initOption(AnalyzerOptions::ConfigTable &Config,
1069                        DiagnosticsEngine *Diags,
1070                        unsigned &OptionField, StringRef Name,
1071                        unsigned DefaultVal) {
1072 
1073   OptionField = DefaultVal;
1074   bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
1075                      .getAsInteger(0, OptionField);
1076   if (Diags && HasFailed)
1077     Diags->Report(diag::err_analyzer_config_invalid_input)
1078       << Name << "an unsigned";
1079 }
1080 
1081 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
1082                                  DiagnosticsEngine *Diags) {
1083   // TODO: There's no need to store the entire configtable, it'd be plenty
1084   // enough tostore checker options.
1085 
1086 #define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL)                \
1087   initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);
1088 
1089 #define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC,        \
1090                                            SHALLOW_VAL, DEEP_VAL)              \
1091   switch (AnOpts.getUserMode()) {                                              \
1092   case UMK_Shallow:                                                            \
1093     initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, SHALLOW_VAL);       \
1094     break;                                                                     \
1095   case UMK_Deep:                                                               \
1096     initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEEP_VAL);          \
1097     break;                                                                     \
1098   }                                                                            \
1099 
1100 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
1101 #undef ANALYZER_OPTION
1102 #undef ANALYZER_OPTION_DEPENDS_ON_USER_MODE
1103 
1104   // At this point, AnalyzerOptions is configured. Let's validate some options.
1105 
1106   // FIXME: Here we try to validate the silenced checkers or packages are valid.
1107   // The current approach only validates the registered checkers which does not
1108   // contain the runtime enabled checkers and optimally we would validate both.
1109   if (!AnOpts.RawSilencedCheckersAndPackages.empty()) {
1110     std::vector<StringRef> Checkers =
1111         AnOpts.getRegisteredCheckers(/*IncludeExperimental=*/true);
1112     std::vector<StringRef> Packages =
1113         AnOpts.getRegisteredPackages(/*IncludeExperimental=*/true);
1114 
1115     SmallVector<StringRef, 16> CheckersAndPackages;
1116     AnOpts.RawSilencedCheckersAndPackages.split(CheckersAndPackages, ";");
1117 
1118     for (const StringRef &CheckerOrPackage : CheckersAndPackages) {
1119       if (Diags) {
1120         bool IsChecker = CheckerOrPackage.contains('.');
1121         bool IsValidName =
1122             IsChecker
1123                 ? llvm::find(Checkers, CheckerOrPackage) != Checkers.end()
1124                 : llvm::find(Packages, CheckerOrPackage) != Packages.end();
1125 
1126         if (!IsValidName)
1127           Diags->Report(diag::err_unknown_analyzer_checker_or_package)
1128               << CheckerOrPackage;
1129       }
1130 
1131       AnOpts.SilencedCheckersAndPackages.emplace_back(CheckerOrPackage);
1132     }
1133   }
1134 
1135   if (!Diags)
1136     return;
1137 
1138   if (AnOpts.ShouldTrackConditionsDebug && !AnOpts.ShouldTrackConditions)
1139     Diags->Report(diag::err_analyzer_config_invalid_input)
1140         << "track-conditions-debug" << "'track-conditions' to also be enabled";
1141 
1142   if (!AnOpts.CTUDir.empty() && !llvm::sys::fs::is_directory(AnOpts.CTUDir))
1143     Diags->Report(diag::err_analyzer_config_invalid_input) << "ctu-dir"
1144                                                            << "a filename";
1145 
1146   if (!AnOpts.ModelPath.empty() &&
1147       !llvm::sys::fs::is_directory(AnOpts.ModelPath))
1148     Diags->Report(diag::err_analyzer_config_invalid_input) << "model-path"
1149                                                            << "a filename";
1150 }
1151 
1152 /// Generate a remark argument. This is an inverse of `ParseOptimizationRemark`.
1153 static void
1154 GenerateOptimizationRemark(SmallVectorImpl<const char *> &Args,
1155                            CompilerInvocation::StringAllocator SA,
1156                            OptSpecifier OptEQ, StringRef Name,
1157                            const CodeGenOptions::OptRemark &Remark) {
1158   if (Remark.hasValidPattern()) {
1159     GenerateArg(Args, OptEQ, Remark.Pattern, SA);
1160   } else if (Remark.Kind == CodeGenOptions::RK_Enabled) {
1161     GenerateArg(Args, OPT_R_Joined, Name, SA);
1162   } else if (Remark.Kind == CodeGenOptions::RK_Disabled) {
1163     GenerateArg(Args, OPT_R_Joined, StringRef("no-") + Name, SA);
1164   }
1165 }
1166 
1167 /// Parse a remark command line argument. It may be missing, disabled/enabled by
1168 /// '-R[no-]group' or specified with a regular expression by '-Rgroup=regexp'.
1169 /// On top of that, it can be disabled/enabled globally by '-R[no-]everything'.
1170 static CodeGenOptions::OptRemark
1171 ParseOptimizationRemark(DiagnosticsEngine &Diags, ArgList &Args,
1172                         OptSpecifier OptEQ, StringRef Name) {
1173   CodeGenOptions::OptRemark Result;
1174 
1175   auto InitializeResultPattern = [&Diags, &Args, &Result](const Arg *A) {
1176     Result.Pattern = A->getValue();
1177 
1178     std::string RegexError;
1179     Result.Regex = std::make_shared<llvm::Regex>(Result.Pattern);
1180     if (!Result.Regex->isValid(RegexError)) {
1181       Diags.Report(diag::err_drv_optimization_remark_pattern)
1182           << RegexError << A->getAsString(Args);
1183       return false;
1184     }
1185 
1186     return true;
1187   };
1188 
1189   for (Arg *A : Args) {
1190     if (A->getOption().matches(OPT_R_Joined)) {
1191       StringRef Value = A->getValue();
1192 
1193       if (Value == Name)
1194         Result.Kind = CodeGenOptions::RK_Enabled;
1195       else if (Value == "everything")
1196         Result.Kind = CodeGenOptions::RK_EnabledEverything;
1197       else if (Value.split('-') == std::make_pair(StringRef("no"), Name))
1198         Result.Kind = CodeGenOptions::RK_Disabled;
1199       else if (Value == "no-everything")
1200         Result.Kind = CodeGenOptions::RK_DisabledEverything;
1201     } else if (A->getOption().matches(OptEQ)) {
1202       Result.Kind = CodeGenOptions::RK_WithPattern;
1203       if (!InitializeResultPattern(A))
1204         return CodeGenOptions::OptRemark();
1205     }
1206   }
1207 
1208   if (Result.Kind == CodeGenOptions::RK_Disabled ||
1209       Result.Kind == CodeGenOptions::RK_DisabledEverything) {
1210     Result.Pattern = "";
1211     Result.Regex = nullptr;
1212   }
1213 
1214   return Result;
1215 }
1216 
1217 static bool parseDiagnosticLevelMask(StringRef FlagName,
1218                                      const std::vector<std::string> &Levels,
1219                                      DiagnosticsEngine &Diags,
1220                                      DiagnosticLevelMask &M) {
1221   bool Success = true;
1222   for (const auto &Level : Levels) {
1223     DiagnosticLevelMask const PM =
1224       llvm::StringSwitch<DiagnosticLevelMask>(Level)
1225         .Case("note",    DiagnosticLevelMask::Note)
1226         .Case("remark",  DiagnosticLevelMask::Remark)
1227         .Case("warning", DiagnosticLevelMask::Warning)
1228         .Case("error",   DiagnosticLevelMask::Error)
1229         .Default(DiagnosticLevelMask::None);
1230     if (PM == DiagnosticLevelMask::None) {
1231       Success = false;
1232       Diags.Report(diag::err_drv_invalid_value) << FlagName << Level;
1233     }
1234     M = M | PM;
1235   }
1236   return Success;
1237 }
1238 
1239 static void parseSanitizerKinds(StringRef FlagName,
1240                                 const std::vector<std::string> &Sanitizers,
1241                                 DiagnosticsEngine &Diags, SanitizerSet &S) {
1242   for (const auto &Sanitizer : Sanitizers) {
1243     SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
1244     if (K == SanitizerMask())
1245       Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
1246     else
1247       S.set(K, true);
1248   }
1249 }
1250 
1251 static SmallVector<StringRef, 4> serializeSanitizerKinds(SanitizerSet S) {
1252   SmallVector<StringRef, 4> Values;
1253   serializeSanitizerSet(S, Values);
1254   return Values;
1255 }
1256 
1257 static void parseXRayInstrumentationBundle(StringRef FlagName, StringRef Bundle,
1258                                            ArgList &Args, DiagnosticsEngine &D,
1259                                            XRayInstrSet &S) {
1260   llvm::SmallVector<StringRef, 2> BundleParts;
1261   llvm::SplitString(Bundle, BundleParts, ",");
1262   for (const auto &B : BundleParts) {
1263     auto Mask = parseXRayInstrValue(B);
1264     if (Mask == XRayInstrKind::None)
1265       if (B != "none")
1266         D.Report(diag::err_drv_invalid_value) << FlagName << Bundle;
1267       else
1268         S.Mask = Mask;
1269     else if (Mask == XRayInstrKind::All)
1270       S.Mask = Mask;
1271     else
1272       S.set(Mask, true);
1273   }
1274 }
1275 
1276 static std::string serializeXRayInstrumentationBundle(const XRayInstrSet &S) {
1277   llvm::SmallVector<StringRef, 2> BundleParts;
1278   serializeXRayInstrValue(S, BundleParts);
1279   std::string Buffer;
1280   llvm::raw_string_ostream OS(Buffer);
1281   llvm::interleave(BundleParts, OS, [&OS](StringRef Part) { OS << Part; }, ",");
1282   return OS.str();
1283 }
1284 
1285 // Set the profile kind using fprofile-instrument-use-path.
1286 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
1287                                   const Twine &ProfileName) {
1288   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
1289   // In error, return silently and let Clang PGOUse report the error message.
1290   if (auto E = ReaderOrErr.takeError()) {
1291     llvm::consumeError(std::move(E));
1292     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
1293     return;
1294   }
1295   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
1296     std::move(ReaderOrErr.get());
1297   if (PGOReader->isIRLevelProfile()) {
1298     if (PGOReader->hasCSIRLevelProfile())
1299       Opts.setProfileUse(CodeGenOptions::ProfileCSIRInstr);
1300     else
1301       Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
1302   } else
1303     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
1304 }
1305 
1306 void CompilerInvocation::GenerateCodeGenArgs(
1307     const CodeGenOptions &Opts, SmallVectorImpl<const char *> &Args,
1308     StringAllocator SA, const llvm::Triple &T, const std::string &OutputFile,
1309     const LangOptions *LangOpts) {
1310   const CodeGenOptions &CodeGenOpts = Opts;
1311 
1312   if (Opts.OptimizationLevel == 0)
1313     GenerateArg(Args, OPT_O0, SA);
1314   else
1315     GenerateArg(Args, OPT_O, Twine(Opts.OptimizationLevel), SA);
1316 
1317 #define CODEGEN_OPTION_WITH_MARSHALLING(                                       \
1318     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1319     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1320     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1321     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1322   GENERATE_OPTION_WITH_MARSHALLING(                                            \
1323       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
1324       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
1325 #include "clang/Driver/Options.inc"
1326 #undef CODEGEN_OPTION_WITH_MARSHALLING
1327 
1328   if (Opts.OptimizationLevel > 0) {
1329     if (Opts.Inlining == CodeGenOptions::NormalInlining)
1330       GenerateArg(Args, OPT_finline_functions, SA);
1331     else if (Opts.Inlining == CodeGenOptions::OnlyHintInlining)
1332       GenerateArg(Args, OPT_finline_hint_functions, SA);
1333     else if (Opts.Inlining == CodeGenOptions::OnlyAlwaysInlining)
1334       GenerateArg(Args, OPT_fno_inline, SA);
1335   }
1336 
1337   if (Opts.DirectAccessExternalData && LangOpts->PICLevel != 0)
1338     GenerateArg(Args, OPT_fdirect_access_external_data, SA);
1339   else if (!Opts.DirectAccessExternalData && LangOpts->PICLevel == 0)
1340     GenerateArg(Args, OPT_fno_direct_access_external_data, SA);
1341 
1342   Optional<StringRef> DebugInfoVal;
1343   switch (Opts.DebugInfo) {
1344   case codegenoptions::DebugLineTablesOnly:
1345     DebugInfoVal = "line-tables-only";
1346     break;
1347   case codegenoptions::DebugDirectivesOnly:
1348     DebugInfoVal = "line-directives-only";
1349     break;
1350   case codegenoptions::DebugInfoConstructor:
1351     DebugInfoVal = "constructor";
1352     break;
1353   case codegenoptions::LimitedDebugInfo:
1354     DebugInfoVal = "limited";
1355     break;
1356   case codegenoptions::FullDebugInfo:
1357     DebugInfoVal = "standalone";
1358     break;
1359   case codegenoptions::UnusedTypeInfo:
1360     DebugInfoVal = "unused-types";
1361     break;
1362   case codegenoptions::NoDebugInfo: // default value
1363     DebugInfoVal = None;
1364     break;
1365   case codegenoptions::LocTrackingOnly: // implied value
1366     DebugInfoVal = None;
1367     break;
1368   }
1369   if (DebugInfoVal)
1370     GenerateArg(Args, OPT_debug_info_kind_EQ, *DebugInfoVal, SA);
1371 
1372   if (Opts.DebugInfo == codegenoptions::DebugInfoConstructor)
1373     GenerateArg(Args, OPT_fuse_ctor_homing, SA);
1374 
1375   for (const auto &Prefix : Opts.DebugPrefixMap)
1376     GenerateArg(Args, OPT_fdebug_prefix_map_EQ,
1377                 Prefix.first + "=" + Prefix.second, SA);
1378 
1379   for (const auto &Prefix : Opts.CoveragePrefixMap)
1380     GenerateArg(Args, OPT_fcoverage_prefix_map_EQ,
1381                 Prefix.first + "=" + Prefix.second, SA);
1382 
1383   if (Opts.NewStructPathTBAA)
1384     GenerateArg(Args, OPT_new_struct_path_tbaa, SA);
1385 
1386   if (Opts.OptimizeSize == 1)
1387     GenerateArg(Args, OPT_O, "s", SA);
1388   else if (Opts.OptimizeSize == 2)
1389     GenerateArg(Args, OPT_O, "z", SA);
1390 
1391   // SimplifyLibCalls is set only in the absence of -fno-builtin and
1392   // -ffreestanding. We'll consider that when generating them.
1393 
1394   // NoBuiltinFuncs are generated by LangOptions.
1395 
1396   if (Opts.UnrollLoops && Opts.OptimizationLevel <= 1)
1397     GenerateArg(Args, OPT_funroll_loops, SA);
1398   else if (!Opts.UnrollLoops && Opts.OptimizationLevel > 1)
1399     GenerateArg(Args, OPT_fno_unroll_loops, SA);
1400 
1401   if (!Opts.BinutilsVersion.empty())
1402     GenerateArg(Args, OPT_fbinutils_version_EQ, Opts.BinutilsVersion, SA);
1403 
1404   if (Opts.DebugNameTable ==
1405       static_cast<unsigned>(llvm::DICompileUnit::DebugNameTableKind::GNU))
1406     GenerateArg(Args, OPT_ggnu_pubnames, SA);
1407   else if (Opts.DebugNameTable ==
1408            static_cast<unsigned>(
1409                llvm::DICompileUnit::DebugNameTableKind::Default))
1410     GenerateArg(Args, OPT_gpubnames, SA);
1411 
1412   // ProfileInstrumentUsePath is marshalled automatically, no need to generate
1413   // it or PGOUseInstrumentor.
1414 
1415   if (Opts.TimePasses) {
1416     if (Opts.TimePassesPerRun)
1417       GenerateArg(Args, OPT_ftime_report_EQ, "per-pass-run", SA);
1418     else
1419       GenerateArg(Args, OPT_ftime_report, SA);
1420   }
1421 
1422   if (Opts.PrepareForLTO && !Opts.PrepareForThinLTO)
1423     GenerateArg(Args, OPT_flto, SA);
1424 
1425   if (Opts.PrepareForThinLTO)
1426     GenerateArg(Args, OPT_flto_EQ, "thin", SA);
1427 
1428   if (!Opts.ThinLTOIndexFile.empty())
1429     GenerateArg(Args, OPT_fthinlto_index_EQ, Opts.ThinLTOIndexFile, SA);
1430 
1431   if (Opts.SaveTempsFilePrefix == OutputFile)
1432     GenerateArg(Args, OPT_save_temps_EQ, "obj", SA);
1433 
1434   StringRef MemProfileBasename("memprof.profraw");
1435   if (!Opts.MemoryProfileOutput.empty()) {
1436     if (Opts.MemoryProfileOutput == MemProfileBasename) {
1437       GenerateArg(Args, OPT_fmemory_profile, SA);
1438     } else {
1439       size_t ArgLength =
1440           Opts.MemoryProfileOutput.size() - MemProfileBasename.size();
1441       GenerateArg(Args, OPT_fmemory_profile_EQ,
1442                   Opts.MemoryProfileOutput.substr(0, ArgLength), SA);
1443     }
1444   }
1445 
1446   if (memcmp(Opts.CoverageVersion, "408*", 4) != 0)
1447     GenerateArg(Args, OPT_coverage_version_EQ,
1448                 StringRef(Opts.CoverageVersion, 4), SA);
1449 
1450   // TODO: Check if we need to generate arguments stored in CmdArgs. (Namely
1451   //  '-fembed_bitcode', which does not map to any CompilerInvocation field and
1452   //  won't be generated.)
1453 
1454   if (Opts.XRayInstrumentationBundle.Mask != XRayInstrKind::All) {
1455     std::string InstrBundle =
1456         serializeXRayInstrumentationBundle(Opts.XRayInstrumentationBundle);
1457     if (!InstrBundle.empty())
1458       GenerateArg(Args, OPT_fxray_instrumentation_bundle, InstrBundle, SA);
1459   }
1460 
1461   if (Opts.CFProtectionReturn && Opts.CFProtectionBranch)
1462     GenerateArg(Args, OPT_fcf_protection_EQ, "full", SA);
1463   else if (Opts.CFProtectionReturn)
1464     GenerateArg(Args, OPT_fcf_protection_EQ, "return", SA);
1465   else if (Opts.CFProtectionBranch)
1466     GenerateArg(Args, OPT_fcf_protection_EQ, "branch", SA);
1467 
1468   for (const auto &F : Opts.LinkBitcodeFiles) {
1469     bool Builtint = F.LinkFlags == llvm::Linker::Flags::LinkOnlyNeeded &&
1470                     F.PropagateAttrs && F.Internalize;
1471     GenerateArg(Args,
1472                 Builtint ? OPT_mlink_builtin_bitcode : OPT_mlink_bitcode_file,
1473                 F.Filename, SA);
1474   }
1475 
1476   // TODO: Consider removing marshalling annotations from f[no_]emulated_tls.
1477   //  That would make it easy to generate the option only **once** if it was
1478   //  explicitly set to non-default value.
1479   if (Opts.ExplicitEmulatedTLS) {
1480     GenerateArg(
1481         Args, Opts.EmulatedTLS ? OPT_femulated_tls : OPT_fno_emulated_tls, SA);
1482   }
1483 
1484   if (Opts.FPDenormalMode != llvm::DenormalMode::getIEEE())
1485     GenerateArg(Args, OPT_fdenormal_fp_math_EQ, Opts.FPDenormalMode.str(), SA);
1486 
1487   if (Opts.FP32DenormalMode != llvm::DenormalMode::getIEEE())
1488     GenerateArg(Args, OPT_fdenormal_fp_math_f32_EQ, Opts.FP32DenormalMode.str(),
1489                 SA);
1490 
1491   if (Opts.StructReturnConvention == CodeGenOptions::SRCK_OnStack) {
1492     OptSpecifier Opt =
1493         T.isPPC32() ? OPT_maix_struct_return : OPT_fpcc_struct_return;
1494     GenerateArg(Args, Opt, SA);
1495   } else if (Opts.StructReturnConvention == CodeGenOptions::SRCK_InRegs) {
1496     OptSpecifier Opt =
1497         T.isPPC32() ? OPT_msvr4_struct_return : OPT_freg_struct_return;
1498     GenerateArg(Args, Opt, SA);
1499   }
1500 
1501   if (Opts.EnableAIXExtendedAltivecABI)
1502     GenerateArg(Args, OPT_mabi_EQ_vec_extabi, SA);
1503 
1504   if (!Opts.OptRecordPasses.empty())
1505     GenerateArg(Args, OPT_opt_record_passes, Opts.OptRecordPasses, SA);
1506 
1507   if (!Opts.OptRecordFormat.empty())
1508     GenerateArg(Args, OPT_opt_record_format, Opts.OptRecordFormat, SA);
1509 
1510   GenerateOptimizationRemark(Args, SA, OPT_Rpass_EQ, "pass",
1511                              Opts.OptimizationRemark);
1512 
1513   GenerateOptimizationRemark(Args, SA, OPT_Rpass_missed_EQ, "pass-missed",
1514                              Opts.OptimizationRemarkMissed);
1515 
1516   GenerateOptimizationRemark(Args, SA, OPT_Rpass_analysis_EQ, "pass-analysis",
1517                              Opts.OptimizationRemarkAnalysis);
1518 
1519   GenerateArg(Args, OPT_fdiagnostics_hotness_threshold_EQ,
1520               Opts.DiagnosticsHotnessThreshold
1521                   ? Twine(*Opts.DiagnosticsHotnessThreshold)
1522                   : "auto",
1523               SA);
1524 
1525   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeRecover))
1526     GenerateArg(Args, OPT_fsanitize_recover_EQ, Sanitizer, SA);
1527 
1528   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeTrap))
1529     GenerateArg(Args, OPT_fsanitize_trap_EQ, Sanitizer, SA);
1530 
1531   if (!Opts.EmitVersionIdentMetadata)
1532     GenerateArg(Args, OPT_Qn, SA);
1533 
1534   switch (Opts.FiniteLoops) {
1535   case CodeGenOptions::FiniteLoopsKind::Language:
1536     break;
1537   case CodeGenOptions::FiniteLoopsKind::Always:
1538     GenerateArg(Args, OPT_ffinite_loops, SA);
1539     break;
1540   case CodeGenOptions::FiniteLoopsKind::Never:
1541     GenerateArg(Args, OPT_fno_finite_loops, SA);
1542     break;
1543   }
1544 }
1545 
1546 bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
1547                                           InputKind IK,
1548                                           DiagnosticsEngine &Diags,
1549                                           const llvm::Triple &T,
1550                                           const std::string &OutputFile,
1551                                           const LangOptions &LangOptsRef) {
1552   unsigned NumErrorsBefore = Diags.getNumErrors();
1553 
1554   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
1555   // TODO: This could be done in Driver
1556   unsigned MaxOptLevel = 3;
1557   if (OptimizationLevel > MaxOptLevel) {
1558     // If the optimization level is not supported, fall back on the default
1559     // optimization
1560     Diags.Report(diag::warn_drv_optimization_value)
1561         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
1562     OptimizationLevel = MaxOptLevel;
1563   }
1564   Opts.OptimizationLevel = OptimizationLevel;
1565 
1566   // The key paths of codegen options defined in Options.td start with
1567   // "CodeGenOpts.". Let's provide the expected variable name and type.
1568   CodeGenOptions &CodeGenOpts = Opts;
1569   // Some codegen options depend on language options. Let's provide the expected
1570   // variable name and type.
1571   const LangOptions *LangOpts = &LangOptsRef;
1572 
1573 #define CODEGEN_OPTION_WITH_MARSHALLING(                                       \
1574     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1575     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1576     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1577     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1578   PARSE_OPTION_WITH_MARSHALLING(                                               \
1579       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
1580       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
1581 #include "clang/Driver/Options.inc"
1582 #undef CODEGEN_OPTION_WITH_MARSHALLING
1583 
1584   // At O0 we want to fully disable inlining outside of cases marked with
1585   // 'alwaysinline' that are required for correctness.
1586   Opts.setInlining((Opts.OptimizationLevel == 0)
1587                        ? CodeGenOptions::OnlyAlwaysInlining
1588                        : CodeGenOptions::NormalInlining);
1589   // Explicit inlining flags can disable some or all inlining even at
1590   // optimization levels above zero.
1591   if (Arg *InlineArg = Args.getLastArg(
1592           options::OPT_finline_functions, options::OPT_finline_hint_functions,
1593           options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
1594     if (Opts.OptimizationLevel > 0) {
1595       const Option &InlineOpt = InlineArg->getOption();
1596       if (InlineOpt.matches(options::OPT_finline_functions))
1597         Opts.setInlining(CodeGenOptions::NormalInlining);
1598       else if (InlineOpt.matches(options::OPT_finline_hint_functions))
1599         Opts.setInlining(CodeGenOptions::OnlyHintInlining);
1600       else
1601         Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
1602     }
1603   }
1604 
1605   // PIC defaults to -fno-direct-access-external-data while non-PIC defaults to
1606   // -fdirect-access-external-data.
1607   Opts.DirectAccessExternalData =
1608       Args.hasArg(OPT_fdirect_access_external_data) ||
1609       (!Args.hasArg(OPT_fno_direct_access_external_data) &&
1610        LangOpts->PICLevel == 0);
1611 
1612   if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
1613     unsigned Val =
1614         llvm::StringSwitch<unsigned>(A->getValue())
1615             .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
1616             .Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
1617             .Case("constructor", codegenoptions::DebugInfoConstructor)
1618             .Case("limited", codegenoptions::LimitedDebugInfo)
1619             .Case("standalone", codegenoptions::FullDebugInfo)
1620             .Case("unused-types", codegenoptions::UnusedTypeInfo)
1621             .Default(~0U);
1622     if (Val == ~0U)
1623       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1624                                                 << A->getValue();
1625     else
1626       Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
1627   }
1628 
1629   // If -fuse-ctor-homing is set and limited debug info is already on, then use
1630   // constructor homing.
1631   if (Args.getLastArg(OPT_fuse_ctor_homing))
1632     if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
1633       Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);
1634 
1635   for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ)) {
1636     auto Split = StringRef(Arg).split('=');
1637     Opts.DebugPrefixMap.insert(
1638         {std::string(Split.first), std::string(Split.second)});
1639   }
1640 
1641   for (const auto &Arg : Args.getAllArgValues(OPT_fcoverage_prefix_map_EQ)) {
1642     auto Split = StringRef(Arg).split('=');
1643     Opts.CoveragePrefixMap.insert(
1644         {std::string(Split.first), std::string(Split.second)});
1645   }
1646 
1647   const llvm::Triple::ArchType DebugEntryValueArchs[] = {
1648       llvm::Triple::x86, llvm::Triple::x86_64, llvm::Triple::aarch64,
1649       llvm::Triple::arm, llvm::Triple::armeb, llvm::Triple::mips,
1650       llvm::Triple::mipsel, llvm::Triple::mips64, llvm::Triple::mips64el};
1651 
1652   if (Opts.OptimizationLevel > 0 && Opts.hasReducedDebugInfo() &&
1653       llvm::is_contained(DebugEntryValueArchs, T.getArch()))
1654     Opts.EmitCallSiteInfo = true;
1655 
1656   if (!Opts.EnableDIPreservationVerify && Opts.DIBugsReportFilePath.size()) {
1657     Diags.Report(diag::warn_ignoring_verify_debuginfo_preserve_export)
1658         << Opts.DIBugsReportFilePath;
1659     Opts.DIBugsReportFilePath = "";
1660   }
1661 
1662   Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
1663                            Args.hasArg(OPT_new_struct_path_tbaa);
1664   Opts.OptimizeSize = getOptimizationLevelSize(Args);
1665   Opts.SimplifyLibCalls = !LangOpts->NoBuiltin;
1666   if (Opts.SimplifyLibCalls)
1667     Opts.NoBuiltinFuncs = LangOpts->NoBuiltinFuncs;
1668   Opts.UnrollLoops =
1669       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
1670                    (Opts.OptimizationLevel > 1));
1671   Opts.BinutilsVersion =
1672       std::string(Args.getLastArgValue(OPT_fbinutils_version_EQ));
1673 
1674   Opts.DebugNameTable = static_cast<unsigned>(
1675       Args.hasArg(OPT_ggnu_pubnames)
1676           ? llvm::DICompileUnit::DebugNameTableKind::GNU
1677           : Args.hasArg(OPT_gpubnames)
1678                 ? llvm::DICompileUnit::DebugNameTableKind::Default
1679                 : llvm::DICompileUnit::DebugNameTableKind::None);
1680 
1681   if (!Opts.ProfileInstrumentUsePath.empty())
1682     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
1683 
1684   if (const Arg *A = Args.getLastArg(OPT_ftime_report, OPT_ftime_report_EQ)) {
1685     Opts.TimePasses = true;
1686 
1687     // -ftime-report= is only for new pass manager.
1688     if (A->getOption().getID() == OPT_ftime_report_EQ) {
1689       if (Opts.LegacyPassManager)
1690         Diags.Report(diag::err_drv_argument_only_allowed_with)
1691             << A->getAsString(Args) << "-fno-legacy-pass-manager";
1692 
1693       StringRef Val = A->getValue();
1694       if (Val == "per-pass")
1695         Opts.TimePassesPerRun = false;
1696       else if (Val == "per-pass-run")
1697         Opts.TimePassesPerRun = true;
1698       else
1699         Diags.Report(diag::err_drv_invalid_value)
1700             << A->getAsString(Args) << A->getValue();
1701     }
1702   }
1703 
1704   Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
1705   Opts.PrepareForThinLTO = false;
1706   if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
1707     StringRef S = A->getValue();
1708     if (S == "thin")
1709       Opts.PrepareForThinLTO = true;
1710     else if (S != "full")
1711       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
1712   }
1713   if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
1714     if (IK.getLanguage() != Language::LLVM_IR)
1715       Diags.Report(diag::err_drv_argument_only_allowed_with)
1716           << A->getAsString(Args) << "-x ir";
1717     Opts.ThinLTOIndexFile =
1718         std::string(Args.getLastArgValue(OPT_fthinlto_index_EQ));
1719   }
1720   if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
1721     Opts.SaveTempsFilePrefix =
1722         llvm::StringSwitch<std::string>(A->getValue())
1723             .Case("obj", OutputFile)
1724             .Default(llvm::sys::path::filename(OutputFile).str());
1725 
1726   // The memory profile runtime appends the pid to make this name more unique.
1727   const char *MemProfileBasename = "memprof.profraw";
1728   if (Args.hasArg(OPT_fmemory_profile_EQ)) {
1729     SmallString<128> Path(
1730         std::string(Args.getLastArgValue(OPT_fmemory_profile_EQ)));
1731     llvm::sys::path::append(Path, MemProfileBasename);
1732     Opts.MemoryProfileOutput = std::string(Path);
1733   } else if (Args.hasArg(OPT_fmemory_profile))
1734     Opts.MemoryProfileOutput = MemProfileBasename;
1735 
1736   memcpy(Opts.CoverageVersion, "408*", 4);
1737   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
1738     if (Args.hasArg(OPT_coverage_version_EQ)) {
1739       StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
1740       if (CoverageVersion.size() != 4) {
1741         Diags.Report(diag::err_drv_invalid_value)
1742             << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
1743             << CoverageVersion;
1744       } else {
1745         memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
1746       }
1747     }
1748   }
1749   // FIXME: For backend options that are not yet recorded as function
1750   // attributes in the IR, keep track of them so we can embed them in a
1751   // separate data section and use them when building the bitcode.
1752   for (const auto &A : Args) {
1753     // Do not encode output and input.
1754     if (A->getOption().getID() == options::OPT_o ||
1755         A->getOption().getID() == options::OPT_INPUT ||
1756         A->getOption().getID() == options::OPT_x ||
1757         A->getOption().getID() == options::OPT_fembed_bitcode ||
1758         A->getOption().matches(options::OPT_W_Group))
1759       continue;
1760     ArgStringList ASL;
1761     A->render(Args, ASL);
1762     for (const auto &arg : ASL) {
1763       StringRef ArgStr(arg);
1764       Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
1765       // using \00 to separate each commandline options.
1766       Opts.CmdArgs.push_back('\0');
1767     }
1768   }
1769 
1770   auto XRayInstrBundles =
1771       Args.getAllArgValues(OPT_fxray_instrumentation_bundle);
1772   if (XRayInstrBundles.empty())
1773     Opts.XRayInstrumentationBundle.Mask = XRayInstrKind::All;
1774   else
1775     for (const auto &A : XRayInstrBundles)
1776       parseXRayInstrumentationBundle("-fxray-instrumentation-bundle=", A, Args,
1777                                      Diags, Opts.XRayInstrumentationBundle);
1778 
1779   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
1780     StringRef Name = A->getValue();
1781     if (Name == "full") {
1782       Opts.CFProtectionReturn = 1;
1783       Opts.CFProtectionBranch = 1;
1784     } else if (Name == "return")
1785       Opts.CFProtectionReturn = 1;
1786     else if (Name == "branch")
1787       Opts.CFProtectionBranch = 1;
1788     else if (Name != "none")
1789       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1790   }
1791 
1792   for (auto *A :
1793        Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_builtin_bitcode)) {
1794     CodeGenOptions::BitcodeFileToLink F;
1795     F.Filename = A->getValue();
1796     if (A->getOption().matches(OPT_mlink_builtin_bitcode)) {
1797       F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
1798       // When linking CUDA bitcode, propagate function attributes so that
1799       // e.g. libdevice gets fast-math attrs if we're building with fast-math.
1800       F.PropagateAttrs = true;
1801       F.Internalize = true;
1802     }
1803     Opts.LinkBitcodeFiles.push_back(F);
1804   }
1805 
1806   if (Args.getLastArg(OPT_femulated_tls) ||
1807       Args.getLastArg(OPT_fno_emulated_tls)) {
1808     Opts.ExplicitEmulatedTLS = true;
1809   }
1810 
1811   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
1812     StringRef Val = A->getValue();
1813     Opts.FPDenormalMode = llvm::parseDenormalFPAttribute(Val);
1814     if (!Opts.FPDenormalMode.isValid())
1815       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1816   }
1817 
1818   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_f32_EQ)) {
1819     StringRef Val = A->getValue();
1820     Opts.FP32DenormalMode = llvm::parseDenormalFPAttribute(Val);
1821     if (!Opts.FP32DenormalMode.isValid())
1822       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1823   }
1824 
1825   // X86_32 has -fppc-struct-return and -freg-struct-return.
1826   // PPC32 has -maix-struct-return and -msvr4-struct-return.
1827   if (Arg *A =
1828           Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return,
1829                           OPT_maix_struct_return, OPT_msvr4_struct_return)) {
1830     // TODO: We might want to consider enabling these options on AIX in the
1831     // future.
1832     if (T.isOSAIX())
1833       Diags.Report(diag::err_drv_unsupported_opt_for_target)
1834           << A->getSpelling() << T.str();
1835 
1836     const Option &O = A->getOption();
1837     if (O.matches(OPT_fpcc_struct_return) ||
1838         O.matches(OPT_maix_struct_return)) {
1839       Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
1840     } else {
1841       assert(O.matches(OPT_freg_struct_return) ||
1842              O.matches(OPT_msvr4_struct_return));
1843       Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
1844     }
1845   }
1846 
1847   if (Arg *A =
1848           Args.getLastArg(OPT_mabi_EQ_vec_default, OPT_mabi_EQ_vec_extabi)) {
1849     if (!T.isOSAIX())
1850       Diags.Report(diag::err_drv_unsupported_opt_for_target)
1851           << A->getSpelling() << T.str();
1852 
1853     const Option &O = A->getOption();
1854     if (O.matches(OPT_mabi_EQ_vec_default))
1855       Diags.Report(diag::err_aix_default_altivec_abi)
1856           << A->getSpelling() << T.str();
1857     else {
1858       assert(O.matches(OPT_mabi_EQ_vec_extabi));
1859       Opts.EnableAIXExtendedAltivecABI = 1;
1860     }
1861   }
1862 
1863   bool NeedLocTracking = false;
1864 
1865   if (!Opts.OptRecordFile.empty())
1866     NeedLocTracking = true;
1867 
1868   if (Arg *A = Args.getLastArg(OPT_opt_record_passes)) {
1869     Opts.OptRecordPasses = A->getValue();
1870     NeedLocTracking = true;
1871   }
1872 
1873   if (Arg *A = Args.getLastArg(OPT_opt_record_format)) {
1874     Opts.OptRecordFormat = A->getValue();
1875     NeedLocTracking = true;
1876   }
1877 
1878   Opts.OptimizationRemark =
1879       ParseOptimizationRemark(Diags, Args, OPT_Rpass_EQ, "pass");
1880 
1881   Opts.OptimizationRemarkMissed =
1882       ParseOptimizationRemark(Diags, Args, OPT_Rpass_missed_EQ, "pass-missed");
1883 
1884   Opts.OptimizationRemarkAnalysis = ParseOptimizationRemark(
1885       Diags, Args, OPT_Rpass_analysis_EQ, "pass-analysis");
1886 
1887   NeedLocTracking |= Opts.OptimizationRemark.hasValidPattern() ||
1888                      Opts.OptimizationRemarkMissed.hasValidPattern() ||
1889                      Opts.OptimizationRemarkAnalysis.hasValidPattern();
1890 
1891   bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
1892   bool UsingProfile = UsingSampleProfile ||
1893       (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
1894 
1895   if (Opts.DiagnosticsWithHotness && !UsingProfile &&
1896       // An IR file will contain PGO as metadata
1897       IK.getLanguage() != Language::LLVM_IR)
1898     Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1899         << "-fdiagnostics-show-hotness";
1900 
1901   // Parse remarks hotness threshold. Valid value is either integer or 'auto'.
1902   if (auto *arg =
1903           Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
1904     auto ResultOrErr =
1905         llvm::remarks::parseHotnessThresholdOption(arg->getValue());
1906 
1907     if (!ResultOrErr) {
1908       Diags.Report(diag::err_drv_invalid_diagnotics_hotness_threshold)
1909           << "-fdiagnostics-hotness-threshold=";
1910     } else {
1911       Opts.DiagnosticsHotnessThreshold = *ResultOrErr;
1912       if ((!Opts.DiagnosticsHotnessThreshold.hasValue() ||
1913            Opts.DiagnosticsHotnessThreshold.getValue() > 0) &&
1914           !UsingProfile)
1915         Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1916             << "-fdiagnostics-hotness-threshold=";
1917     }
1918   }
1919 
1920   // If the user requested to use a sample profile for PGO, then the
1921   // backend will need to track source location information so the profile
1922   // can be incorporated into the IR.
1923   if (UsingSampleProfile)
1924     NeedLocTracking = true;
1925 
1926   // If the user requested a flag that requires source locations available in
1927   // the backend, make sure that the backend tracks source location information.
1928   if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
1929     Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
1930 
1931   // Parse -fsanitize-recover= arguments.
1932   // FIXME: Report unrecoverable sanitizers incorrectly specified here.
1933   parseSanitizerKinds("-fsanitize-recover=",
1934                       Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
1935                       Opts.SanitizeRecover);
1936   parseSanitizerKinds("-fsanitize-trap=",
1937                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
1938                       Opts.SanitizeTrap);
1939 
1940   Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
1941 
1942   if (Args.hasArg(options::OPT_ffinite_loops))
1943     Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Always;
1944   else if (Args.hasArg(options::OPT_fno_finite_loops))
1945     Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Never;
1946 
1947   return Diags.getNumErrors() == NumErrorsBefore;
1948 }
1949 
1950 static void
1951 GenerateDependencyOutputArgs(const DependencyOutputOptions &Opts,
1952                              SmallVectorImpl<const char *> &Args,
1953                              CompilerInvocation::StringAllocator SA) {
1954   const DependencyOutputOptions &DependencyOutputOpts = Opts;
1955 #define DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING(                             \
1956     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1957     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1958     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1959     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1960   GENERATE_OPTION_WITH_MARSHALLING(                                            \
1961       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
1962       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
1963 #include "clang/Driver/Options.inc"
1964 #undef DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING
1965 
1966   if (Opts.ShowIncludesDest != ShowIncludesDestination::None)
1967     GenerateArg(Args, OPT_show_includes, SA);
1968 
1969   for (const auto &Dep : Opts.ExtraDeps) {
1970     switch (Dep.second) {
1971     case EDK_SanitizeBlacklist:
1972       // Sanitizer blacklist arguments are generated from LanguageOptions.
1973       continue;
1974     case EDK_ModuleFile:
1975       // Module file arguments are generated from FrontendOptions and
1976       // HeaderSearchOptions.
1977       continue;
1978     case EDK_ProfileList:
1979       // Profile list arguments are generated from LanguageOptions via the
1980       // marshalling infrastructure.
1981       continue;
1982     case EDK_DepFileEntry:
1983       GenerateArg(Args, OPT_fdepfile_entry, Dep.first, SA);
1984       break;
1985     }
1986   }
1987 }
1988 
1989 static bool ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1990                                       ArgList &Args, DiagnosticsEngine &Diags,
1991                                       frontend::ActionKind Action,
1992                                       bool ShowLineMarkers) {
1993   unsigned NumErrorsBefore = Diags.getNumErrors();
1994 
1995   DependencyOutputOptions &DependencyOutputOpts = Opts;
1996 #define DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING(                             \
1997     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1998     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1999     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2000     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2001   PARSE_OPTION_WITH_MARSHALLING(                                               \
2002       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2003       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2004 #include "clang/Driver/Options.inc"
2005 #undef DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING
2006 
2007   if (Args.hasArg(OPT_show_includes)) {
2008     // Writing both /showIncludes and preprocessor output to stdout
2009     // would produce interleaved output, so use stderr for /showIncludes.
2010     // This behaves the same as cl.exe, when /E, /EP or /P are passed.
2011     if (Action == frontend::PrintPreprocessedInput || !ShowLineMarkers)
2012       Opts.ShowIncludesDest = ShowIncludesDestination::Stderr;
2013     else
2014       Opts.ShowIncludesDest = ShowIncludesDestination::Stdout;
2015   } else {
2016     Opts.ShowIncludesDest = ShowIncludesDestination::None;
2017   }
2018 
2019   // Add sanitizer blacklists as extra dependencies.
2020   // They won't be discovered by the regular preprocessor, so
2021   // we let make / ninja to know about this implicit dependency.
2022   if (!Args.hasArg(OPT_fno_sanitize_blacklist)) {
2023     for (const auto *A : Args.filtered(OPT_fsanitize_blacklist)) {
2024       StringRef Val = A->getValue();
2025       if (Val.find('=') == StringRef::npos)
2026         Opts.ExtraDeps.emplace_back(std::string(Val), EDK_SanitizeBlacklist);
2027     }
2028     if (Opts.IncludeSystemHeaders) {
2029       for (const auto *A : Args.filtered(OPT_fsanitize_system_blacklist)) {
2030         StringRef Val = A->getValue();
2031         if (Val.find('=') == StringRef::npos)
2032           Opts.ExtraDeps.emplace_back(std::string(Val), EDK_SanitizeBlacklist);
2033       }
2034     }
2035   }
2036 
2037   // -fprofile-list= dependencies.
2038   for (const auto &Filename : Args.getAllArgValues(OPT_fprofile_list_EQ))
2039     Opts.ExtraDeps.emplace_back(Filename, EDK_ProfileList);
2040 
2041   // Propagate the extra dependencies.
2042   for (const auto *A : Args.filtered(OPT_fdepfile_entry))
2043     Opts.ExtraDeps.emplace_back(A->getValue(), EDK_DepFileEntry);
2044 
2045   // Only the -fmodule-file=<file> form.
2046   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2047     StringRef Val = A->getValue();
2048     if (Val.find('=') == StringRef::npos)
2049       Opts.ExtraDeps.emplace_back(std::string(Val), EDK_ModuleFile);
2050   }
2051 
2052   return Diags.getNumErrors() == NumErrorsBefore;
2053 }
2054 
2055 static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
2056   // Color diagnostics default to auto ("on" if terminal supports) in the driver
2057   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
2058   // Support both clang's -f[no-]color-diagnostics and gcc's
2059   // -f[no-]diagnostics-colors[=never|always|auto].
2060   enum {
2061     Colors_On,
2062     Colors_Off,
2063     Colors_Auto
2064   } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
2065   for (auto *A : Args) {
2066     const Option &O = A->getOption();
2067     if (O.matches(options::OPT_fcolor_diagnostics) ||
2068         O.matches(options::OPT_fdiagnostics_color)) {
2069       ShowColors = Colors_On;
2070     } else if (O.matches(options::OPT_fno_color_diagnostics) ||
2071                O.matches(options::OPT_fno_diagnostics_color)) {
2072       ShowColors = Colors_Off;
2073     } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
2074       StringRef Value(A->getValue());
2075       if (Value == "always")
2076         ShowColors = Colors_On;
2077       else if (Value == "never")
2078         ShowColors = Colors_Off;
2079       else if (Value == "auto")
2080         ShowColors = Colors_Auto;
2081     }
2082   }
2083   return ShowColors == Colors_On ||
2084          (ShowColors == Colors_Auto &&
2085           llvm::sys::Process::StandardErrHasColors());
2086 }
2087 
2088 static bool checkVerifyPrefixes(const std::vector<std::string> &VerifyPrefixes,
2089                                 DiagnosticsEngine &Diags) {
2090   bool Success = true;
2091   for (const auto &Prefix : VerifyPrefixes) {
2092     // Every prefix must start with a letter and contain only alphanumeric
2093     // characters, hyphens, and underscores.
2094     auto BadChar = llvm::find_if(Prefix, [](char C) {
2095       return !isAlphanumeric(C) && C != '-' && C != '_';
2096     });
2097     if (BadChar != Prefix.end() || !isLetter(Prefix[0])) {
2098       Success = false;
2099       Diags.Report(diag::err_drv_invalid_value) << "-verify=" << Prefix;
2100       Diags.Report(diag::note_drv_verify_prefix_spelling);
2101     }
2102   }
2103   return Success;
2104 }
2105 
2106 static void GenerateFileSystemArgs(const FileSystemOptions &Opts,
2107                                    SmallVectorImpl<const char *> &Args,
2108                                    CompilerInvocation::StringAllocator SA) {
2109   const FileSystemOptions &FileSystemOpts = Opts;
2110 
2111 #define FILE_SYSTEM_OPTION_WITH_MARSHALLING(                                   \
2112     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2113     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2114     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2115     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2116   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2117       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2118       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2119 #include "clang/Driver/Options.inc"
2120 #undef FILE_SYSTEM_OPTION_WITH_MARSHALLING
2121 }
2122 
2123 static bool ParseFileSystemArgs(FileSystemOptions &Opts, const ArgList &Args,
2124                                 DiagnosticsEngine &Diags) {
2125   unsigned NumErrorsBefore = Diags.getNumErrors();
2126 
2127   FileSystemOptions &FileSystemOpts = Opts;
2128 
2129 #define FILE_SYSTEM_OPTION_WITH_MARSHALLING(                                   \
2130     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2131     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2132     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2133     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2134   PARSE_OPTION_WITH_MARSHALLING(                                               \
2135       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2136       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2137 #include "clang/Driver/Options.inc"
2138 #undef FILE_SYSTEM_OPTION_WITH_MARSHALLING
2139 
2140   return Diags.getNumErrors() == NumErrorsBefore;
2141 }
2142 
2143 static void GenerateMigratorArgs(const MigratorOptions &Opts,
2144                                  SmallVectorImpl<const char *> &Args,
2145                                  CompilerInvocation::StringAllocator SA) {
2146   const MigratorOptions &MigratorOpts = Opts;
2147 #define MIGRATOR_OPTION_WITH_MARSHALLING(                                      \
2148     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2149     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2150     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2151     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2152   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2153       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2154       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2155 #include "clang/Driver/Options.inc"
2156 #undef MIGRATOR_OPTION_WITH_MARSHALLING
2157 }
2158 
2159 static bool ParseMigratorArgs(MigratorOptions &Opts, const ArgList &Args,
2160                               DiagnosticsEngine &Diags) {
2161   unsigned NumErrorsBefore = Diags.getNumErrors();
2162 
2163   MigratorOptions &MigratorOpts = Opts;
2164 
2165 #define MIGRATOR_OPTION_WITH_MARSHALLING(                                      \
2166     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2167     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2168     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2169     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2170   PARSE_OPTION_WITH_MARSHALLING(                                               \
2171       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2172       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2173 #include "clang/Driver/Options.inc"
2174 #undef MIGRATOR_OPTION_WITH_MARSHALLING
2175 
2176   return Diags.getNumErrors() == NumErrorsBefore;
2177 }
2178 
2179 void CompilerInvocation::GenerateDiagnosticArgs(
2180     const DiagnosticOptions &Opts, SmallVectorImpl<const char *> &Args,
2181     StringAllocator SA, bool DefaultDiagColor) {
2182   const DiagnosticOptions *DiagnosticOpts = &Opts;
2183 #define DIAG_OPTION_WITH_MARSHALLING(                                          \
2184     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2185     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2186     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2187     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2188   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2189       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2190       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2191 #include "clang/Driver/Options.inc"
2192 #undef DIAG_OPTION_WITH_MARSHALLING
2193 
2194   if (!Opts.DiagnosticSerializationFile.empty())
2195     GenerateArg(Args, OPT_diagnostic_serialized_file,
2196                 Opts.DiagnosticSerializationFile, SA);
2197 
2198   if (Opts.ShowColors)
2199     GenerateArg(Args, OPT_fcolor_diagnostics, SA);
2200 
2201   if (Opts.VerifyDiagnostics &&
2202       llvm::is_contained(Opts.VerifyPrefixes, "expected"))
2203     GenerateArg(Args, OPT_verify, SA);
2204 
2205   for (const auto &Prefix : Opts.VerifyPrefixes)
2206     if (Prefix != "expected")
2207       GenerateArg(Args, OPT_verify_EQ, Prefix, SA);
2208 
2209   DiagnosticLevelMask VIU = Opts.getVerifyIgnoreUnexpected();
2210   if (VIU == DiagnosticLevelMask::None) {
2211     // This is the default, don't generate anything.
2212   } else if (VIU == DiagnosticLevelMask::All) {
2213     GenerateArg(Args, OPT_verify_ignore_unexpected, SA);
2214   } else {
2215     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Note) != 0)
2216       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "note", SA);
2217     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Remark) != 0)
2218       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "remark", SA);
2219     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Warning) != 0)
2220       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "warning", SA);
2221     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Error) != 0)
2222       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "error", SA);
2223   }
2224 
2225   for (const auto &Warning : Opts.Warnings) {
2226     // This option is automatically generated from UndefPrefixes.
2227     if (Warning == "undef-prefix")
2228       continue;
2229     Args.push_back(SA(StringRef("-W") + Warning));
2230   }
2231 
2232   for (const auto &Remark : Opts.Remarks) {
2233     // These arguments are generated from OptimizationRemark fields of
2234     // CodeGenOptions.
2235     StringRef IgnoredRemarks[] = {"pass",          "no-pass",
2236                                   "pass-analysis", "no-pass-analysis",
2237                                   "pass-missed",   "no-pass-missed"};
2238     if (llvm::is_contained(IgnoredRemarks, Remark))
2239       continue;
2240 
2241     Args.push_back(SA(StringRef("-R") + Remark));
2242   }
2243 }
2244 
2245 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
2246                                 DiagnosticsEngine *Diags,
2247                                 bool DefaultDiagColor) {
2248   Optional<DiagnosticsEngine> IgnoringDiags;
2249   if (!Diags) {
2250     IgnoringDiags.emplace(new DiagnosticIDs(), new DiagnosticOptions(),
2251                           new IgnoringDiagConsumer());
2252     Diags = &*IgnoringDiags;
2253   }
2254 
2255   unsigned NumErrorsBefore = Diags->getNumErrors();
2256 
2257   // The key paths of diagnostic options defined in Options.td start with
2258   // "DiagnosticOpts->". Let's provide the expected variable name and type.
2259   DiagnosticOptions *DiagnosticOpts = &Opts;
2260 
2261 #define DIAG_OPTION_WITH_MARSHALLING(                                          \
2262     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2263     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2264     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2265     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2266   PARSE_OPTION_WITH_MARSHALLING(                                               \
2267       Args, *Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,    \
2268       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2269 #include "clang/Driver/Options.inc"
2270 #undef DIAG_OPTION_WITH_MARSHALLING
2271 
2272   llvm::sys::Process::UseANSIEscapeCodes(Opts.UseANSIEscapeCodes);
2273 
2274   if (Arg *A =
2275           Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
2276     Opts.DiagnosticSerializationFile = A->getValue();
2277   Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
2278 
2279   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify) || Args.hasArg(OPT_verify_EQ);
2280   Opts.VerifyPrefixes = Args.getAllArgValues(OPT_verify_EQ);
2281   if (Args.hasArg(OPT_verify))
2282     Opts.VerifyPrefixes.push_back("expected");
2283   // Keep VerifyPrefixes in its original order for the sake of diagnostics, and
2284   // then sort it to prepare for fast lookup using std::binary_search.
2285   if (!checkVerifyPrefixes(Opts.VerifyPrefixes, *Diags))
2286     Opts.VerifyDiagnostics = false;
2287   else
2288     llvm::sort(Opts.VerifyPrefixes);
2289   DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
2290   parseDiagnosticLevelMask(
2291       "-verify-ignore-unexpected=",
2292       Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ), *Diags, DiagMask);
2293   if (Args.hasArg(OPT_verify_ignore_unexpected))
2294     DiagMask = DiagnosticLevelMask::All;
2295   Opts.setVerifyIgnoreUnexpected(DiagMask);
2296   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
2297     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
2298     Diags->Report(diag::warn_ignoring_ftabstop_value)
2299         << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
2300   }
2301 
2302   addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
2303   addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
2304 
2305   return Diags->getNumErrors() == NumErrorsBefore;
2306 }
2307 
2308 /// Parse the argument to the -ftest-module-file-extension
2309 /// command-line argument.
2310 ///
2311 /// \returns true on error, false on success.
2312 static bool parseTestModuleFileExtensionArg(StringRef Arg,
2313                                             std::string &BlockName,
2314                                             unsigned &MajorVersion,
2315                                             unsigned &MinorVersion,
2316                                             bool &Hashed,
2317                                             std::string &UserInfo) {
2318   SmallVector<StringRef, 5> Args;
2319   Arg.split(Args, ':', 5);
2320   if (Args.size() < 5)
2321     return true;
2322 
2323   BlockName = std::string(Args[0]);
2324   if (Args[1].getAsInteger(10, MajorVersion)) return true;
2325   if (Args[2].getAsInteger(10, MinorVersion)) return true;
2326   if (Args[3].getAsInteger(2, Hashed)) return true;
2327   if (Args.size() > 4)
2328     UserInfo = std::string(Args[4]);
2329   return false;
2330 }
2331 
2332 /// Return a table that associates command line option specifiers with the
2333 /// frontend action. Note: The pair {frontend::PluginAction, OPT_plugin} is
2334 /// intentionally missing, as this case is handled separately from other
2335 /// frontend options.
2336 static const auto &getFrontendActionTable() {
2337   static const std::pair<frontend::ActionKind, unsigned> Table[] = {
2338       {frontend::ASTDeclList, OPT_ast_list},
2339 
2340       {frontend::ASTDump, OPT_ast_dump_all_EQ},
2341       {frontend::ASTDump, OPT_ast_dump_all},
2342       {frontend::ASTDump, OPT_ast_dump_EQ},
2343       {frontend::ASTDump, OPT_ast_dump},
2344       {frontend::ASTDump, OPT_ast_dump_lookups},
2345       {frontend::ASTDump, OPT_ast_dump_decl_types},
2346 
2347       {frontend::ASTPrint, OPT_ast_print},
2348       {frontend::ASTView, OPT_ast_view},
2349       {frontend::DumpCompilerOptions, OPT_compiler_options_dump},
2350       {frontend::DumpRawTokens, OPT_dump_raw_tokens},
2351       {frontend::DumpTokens, OPT_dump_tokens},
2352       {frontend::EmitAssembly, OPT_S},
2353       {frontend::EmitBC, OPT_emit_llvm_bc},
2354       {frontend::EmitHTML, OPT_emit_html},
2355       {frontend::EmitLLVM, OPT_emit_llvm},
2356       {frontend::EmitLLVMOnly, OPT_emit_llvm_only},
2357       {frontend::EmitCodeGenOnly, OPT_emit_codegen_only},
2358       {frontend::EmitCodeGenOnly, OPT_emit_codegen_only},
2359       {frontend::EmitObj, OPT_emit_obj},
2360 
2361       {frontend::FixIt, OPT_fixit_EQ},
2362       {frontend::FixIt, OPT_fixit},
2363 
2364       {frontend::GenerateModule, OPT_emit_module},
2365       {frontend::GenerateModuleInterface, OPT_emit_module_interface},
2366       {frontend::GenerateHeaderModule, OPT_emit_header_module},
2367       {frontend::GeneratePCH, OPT_emit_pch},
2368       {frontend::GenerateInterfaceStubs, OPT_emit_interface_stubs},
2369       {frontend::InitOnly, OPT_init_only},
2370       {frontend::ParseSyntaxOnly, OPT_fsyntax_only},
2371       {frontend::ModuleFileInfo, OPT_module_file_info},
2372       {frontend::VerifyPCH, OPT_verify_pch},
2373       {frontend::PrintPreamble, OPT_print_preamble},
2374       {frontend::PrintPreprocessedInput, OPT_E},
2375       {frontend::TemplightDump, OPT_templight_dump},
2376       {frontend::RewriteMacros, OPT_rewrite_macros},
2377       {frontend::RewriteObjC, OPT_rewrite_objc},
2378       {frontend::RewriteTest, OPT_rewrite_test},
2379       {frontend::RunAnalysis, OPT_analyze},
2380       {frontend::MigrateSource, OPT_migrate},
2381       {frontend::RunPreprocessorOnly, OPT_Eonly},
2382       {frontend::PrintDependencyDirectivesSourceMinimizerOutput,
2383           OPT_print_dependency_directives_minimized_source},
2384   };
2385 
2386   return Table;
2387 }
2388 
2389 /// Maps command line option to frontend action.
2390 static Optional<frontend::ActionKind> getFrontendAction(OptSpecifier &Opt) {
2391   for (const auto &ActionOpt : getFrontendActionTable())
2392     if (ActionOpt.second == Opt.getID())
2393       return ActionOpt.first;
2394 
2395   return None;
2396 }
2397 
2398 /// Maps frontend action to command line option.
2399 static Optional<OptSpecifier>
2400 getProgramActionOpt(frontend::ActionKind ProgramAction) {
2401   for (const auto &ActionOpt : getFrontendActionTable())
2402     if (ActionOpt.first == ProgramAction)
2403       return OptSpecifier(ActionOpt.second);
2404 
2405   return None;
2406 }
2407 
2408 static void GenerateFrontendArgs(const FrontendOptions &Opts,
2409                                  SmallVectorImpl<const char *> &Args,
2410                                  CompilerInvocation::StringAllocator SA,
2411                                  bool IsHeader) {
2412   const FrontendOptions &FrontendOpts = Opts;
2413 #define FRONTEND_OPTION_WITH_MARSHALLING(                                      \
2414     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2415     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2416     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2417     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2418   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2419       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2420       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2421 #include "clang/Driver/Options.inc"
2422 #undef FRONTEND_OPTION_WITH_MARSHALLING
2423 
2424   Optional<OptSpecifier> ProgramActionOpt =
2425       getProgramActionOpt(Opts.ProgramAction);
2426 
2427   // Generating a simple flag covers most frontend actions.
2428   std::function<void()> GenerateProgramAction = [&]() {
2429     GenerateArg(Args, *ProgramActionOpt, SA);
2430   };
2431 
2432   if (!ProgramActionOpt) {
2433     // PluginAction is the only program action handled separately.
2434     assert(Opts.ProgramAction == frontend::PluginAction &&
2435            "Frontend action without option.");
2436     GenerateProgramAction = [&]() {
2437       GenerateArg(Args, OPT_plugin, Opts.ActionName, SA);
2438     };
2439   }
2440 
2441   // FIXME: Simplify the complex 'AST dump' command line.
2442   if (Opts.ProgramAction == frontend::ASTDump) {
2443     GenerateProgramAction = [&]() {
2444       // ASTDumpLookups, ASTDumpDeclTypes and ASTDumpFilter are generated via
2445       // marshalling infrastructure.
2446 
2447       if (Opts.ASTDumpFormat != ADOF_Default) {
2448         StringRef Format;
2449         switch (Opts.ASTDumpFormat) {
2450         case ADOF_Default:
2451           llvm_unreachable("Default AST dump format.");
2452         case ADOF_JSON:
2453           Format = "json";
2454           break;
2455         }
2456 
2457         if (Opts.ASTDumpAll)
2458           GenerateArg(Args, OPT_ast_dump_all_EQ, Format, SA);
2459         if (Opts.ASTDumpDecls)
2460           GenerateArg(Args, OPT_ast_dump_EQ, Format, SA);
2461       } else {
2462         if (Opts.ASTDumpAll)
2463           GenerateArg(Args, OPT_ast_dump_all, SA);
2464         if (Opts.ASTDumpDecls)
2465           GenerateArg(Args, OPT_ast_dump, SA);
2466       }
2467     };
2468   }
2469 
2470   if (Opts.ProgramAction == frontend::FixIt && !Opts.FixItSuffix.empty()) {
2471     GenerateProgramAction = [&]() {
2472       GenerateArg(Args, OPT_fixit_EQ, Opts.FixItSuffix, SA);
2473     };
2474   }
2475 
2476   GenerateProgramAction();
2477 
2478   for (const auto &PluginArgs : Opts.PluginArgs) {
2479     Option Opt = getDriverOptTable().getOption(OPT_plugin_arg);
2480     const char *Spelling =
2481         SA(Opt.getPrefix() + Opt.getName() + PluginArgs.first);
2482     for (const auto &PluginArg : PluginArgs.second)
2483       denormalizeString(Args, Spelling, SA, Opt.getKind(), 0, PluginArg);
2484   }
2485 
2486   for (const auto &Ext : Opts.ModuleFileExtensions)
2487     if (auto *TestExt = dyn_cast_or_null<TestModuleFileExtension>(Ext.get()))
2488       GenerateArg(Args, OPT_ftest_module_file_extension_EQ, TestExt->str(), SA);
2489 
2490   if (!Opts.CodeCompletionAt.FileName.empty())
2491     GenerateArg(Args, OPT_code_completion_at, Opts.CodeCompletionAt.ToString(),
2492                 SA);
2493 
2494   for (const auto &Plugin : Opts.Plugins)
2495     GenerateArg(Args, OPT_load, Plugin, SA);
2496 
2497   // ASTDumpDecls and ASTDumpAll already handled with ProgramAction.
2498 
2499   for (const auto &ModuleFile : Opts.ModuleFiles)
2500     GenerateArg(Args, OPT_fmodule_file, ModuleFile, SA);
2501 
2502   if (Opts.AuxTargetCPU.hasValue())
2503     GenerateArg(Args, OPT_aux_target_cpu, *Opts.AuxTargetCPU, SA);
2504 
2505   if (Opts.AuxTargetFeatures.hasValue())
2506     for (const auto &Feature : *Opts.AuxTargetFeatures)
2507       GenerateArg(Args, OPT_aux_target_feature, Feature, SA);
2508 
2509   {
2510     StringRef Preprocessed = Opts.DashX.isPreprocessed() ? "-cpp-output" : "";
2511     StringRef ModuleMap =
2512         Opts.DashX.getFormat() == InputKind::ModuleMap ? "-module-map" : "";
2513     StringRef Header = IsHeader ? "-header" : "";
2514 
2515     StringRef Lang;
2516     switch (Opts.DashX.getLanguage()) {
2517     case Language::C:
2518       Lang = "c";
2519       break;
2520     case Language::OpenCL:
2521       Lang = "cl";
2522       break;
2523     case Language::OpenCLCXX:
2524       Lang = "clcpp";
2525       break;
2526     case Language::CUDA:
2527       Lang = "cuda";
2528       break;
2529     case Language::HIP:
2530       Lang = "hip";
2531       break;
2532     case Language::CXX:
2533       Lang = "c++";
2534       break;
2535     case Language::ObjC:
2536       Lang = "objective-c";
2537       break;
2538     case Language::ObjCXX:
2539       Lang = "objective-c++";
2540       break;
2541     case Language::RenderScript:
2542       Lang = "renderscript";
2543       break;
2544     case Language::Asm:
2545       Lang = "assembler-with-cpp";
2546       break;
2547     case Language::Unknown:
2548       assert(Opts.DashX.getFormat() == InputKind::Precompiled &&
2549              "Generating -x argument for unknown language (not precompiled).");
2550       Lang = "ast";
2551       break;
2552     case Language::LLVM_IR:
2553       Lang = "ir";
2554       break;
2555     }
2556 
2557     GenerateArg(Args, OPT_x, Lang + Header + ModuleMap + Preprocessed, SA);
2558   }
2559 
2560   // OPT_INPUT has a unique class, generate it directly.
2561   for (const auto &Input : Opts.Inputs)
2562     Args.push_back(SA(Input.getFile()));
2563 }
2564 
2565 static bool ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
2566                               DiagnosticsEngine &Diags, bool &IsHeaderFile) {
2567   unsigned NumErrorsBefore = Diags.getNumErrors();
2568 
2569   FrontendOptions &FrontendOpts = Opts;
2570 
2571 #define FRONTEND_OPTION_WITH_MARSHALLING(                                      \
2572     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2573     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2574     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2575     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2576   PARSE_OPTION_WITH_MARSHALLING(                                               \
2577       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2578       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2579 #include "clang/Driver/Options.inc"
2580 #undef FRONTEND_OPTION_WITH_MARSHALLING
2581 
2582   Opts.ProgramAction = frontend::ParseSyntaxOnly;
2583   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
2584     OptSpecifier Opt = OptSpecifier(A->getOption().getID());
2585     Optional<frontend::ActionKind> ProgramAction = getFrontendAction(Opt);
2586     assert(ProgramAction && "Option specifier not in Action_Group.");
2587 
2588     if (ProgramAction == frontend::ASTDump &&
2589         (Opt == OPT_ast_dump_all_EQ || Opt == OPT_ast_dump_EQ)) {
2590       unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
2591                          .CaseLower("default", ADOF_Default)
2592                          .CaseLower("json", ADOF_JSON)
2593                          .Default(std::numeric_limits<unsigned>::max());
2594 
2595       if (Val != std::numeric_limits<unsigned>::max())
2596         Opts.ASTDumpFormat = static_cast<ASTDumpOutputFormat>(Val);
2597       else {
2598         Diags.Report(diag::err_drv_invalid_value)
2599             << A->getAsString(Args) << A->getValue();
2600         Opts.ASTDumpFormat = ADOF_Default;
2601       }
2602     }
2603 
2604     if (ProgramAction == frontend::FixIt && Opt == OPT_fixit_EQ)
2605       Opts.FixItSuffix = A->getValue();
2606 
2607     if (ProgramAction == frontend::GenerateInterfaceStubs) {
2608       StringRef ArgStr =
2609           Args.hasArg(OPT_interface_stub_version_EQ)
2610               ? Args.getLastArgValue(OPT_interface_stub_version_EQ)
2611               : "experimental-ifs-v2";
2612       if (ArgStr == "experimental-yaml-elf-v1" ||
2613           ArgStr == "experimental-ifs-v1" ||
2614           ArgStr == "experimental-tapi-elf-v1") {
2615         std::string ErrorMessage =
2616             "Invalid interface stub format: " + ArgStr.str() +
2617             " is deprecated.";
2618         Diags.Report(diag::err_drv_invalid_value)
2619             << "Must specify a valid interface stub format type, ie: "
2620                "-interface-stub-version=experimental-ifs-v2"
2621             << ErrorMessage;
2622         ProgramAction = frontend::ParseSyntaxOnly;
2623       } else if (!ArgStr.startswith("experimental-ifs-")) {
2624         std::string ErrorMessage =
2625             "Invalid interface stub format: " + ArgStr.str() + ".";
2626         Diags.Report(diag::err_drv_invalid_value)
2627             << "Must specify a valid interface stub format type, ie: "
2628                "-interface-stub-version=experimental-ifs-v2"
2629             << ErrorMessage;
2630         ProgramAction = frontend::ParseSyntaxOnly;
2631       }
2632     }
2633 
2634     Opts.ProgramAction = *ProgramAction;
2635   }
2636 
2637   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
2638     Opts.Plugins.emplace_back(A->getValue(0));
2639     Opts.ProgramAction = frontend::PluginAction;
2640     Opts.ActionName = A->getValue();
2641   }
2642   for (const auto *AA : Args.filtered(OPT_plugin_arg))
2643     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
2644 
2645   for (const std::string &Arg :
2646          Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
2647     std::string BlockName;
2648     unsigned MajorVersion;
2649     unsigned MinorVersion;
2650     bool Hashed;
2651     std::string UserInfo;
2652     if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
2653                                         MinorVersion, Hashed, UserInfo)) {
2654       Diags.Report(diag::err_test_module_file_extension_format) << Arg;
2655 
2656       continue;
2657     }
2658 
2659     // Add the testing module file extension.
2660     Opts.ModuleFileExtensions.push_back(
2661         std::make_shared<TestModuleFileExtension>(
2662             BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
2663   }
2664 
2665   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
2666     Opts.CodeCompletionAt =
2667       ParsedSourceLocation::FromString(A->getValue());
2668     if (Opts.CodeCompletionAt.FileName.empty())
2669       Diags.Report(diag::err_drv_invalid_value)
2670         << A->getAsString(Args) << A->getValue();
2671   }
2672 
2673   Opts.Plugins = Args.getAllArgValues(OPT_load);
2674   Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump, OPT_ast_dump_EQ);
2675   Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all, OPT_ast_dump_all_EQ);
2676   // Only the -fmodule-file=<file> form.
2677   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2678     StringRef Val = A->getValue();
2679     if (Val.find('=') == StringRef::npos)
2680       Opts.ModuleFiles.push_back(std::string(Val));
2681   }
2682 
2683   if (Opts.ProgramAction != frontend::GenerateModule && Opts.IsSystemModule)
2684     Diags.Report(diag::err_drv_argument_only_allowed_with) << "-fsystem-module"
2685                                                            << "-emit-module";
2686 
2687   if (Args.hasArg(OPT_aux_target_cpu))
2688     Opts.AuxTargetCPU = std::string(Args.getLastArgValue(OPT_aux_target_cpu));
2689   if (Args.hasArg(OPT_aux_target_feature))
2690     Opts.AuxTargetFeatures = Args.getAllArgValues(OPT_aux_target_feature);
2691 
2692   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
2693       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
2694     Diags.Report(diag::err_drv_argument_not_allowed_with)
2695       << "ARC migration" << "ObjC migration";
2696   }
2697 
2698   InputKind DashX(Language::Unknown);
2699   if (const Arg *A = Args.getLastArg(OPT_x)) {
2700     StringRef XValue = A->getValue();
2701 
2702     // Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
2703     // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
2704     bool Preprocessed = XValue.consume_back("-cpp-output");
2705     bool ModuleMap = XValue.consume_back("-module-map");
2706     IsHeaderFile = !Preprocessed && !ModuleMap &&
2707                    XValue != "precompiled-header" &&
2708                    XValue.consume_back("-header");
2709 
2710     // Principal languages.
2711     DashX = llvm::StringSwitch<InputKind>(XValue)
2712                 .Case("c", Language::C)
2713                 .Case("cl", Language::OpenCL)
2714                 .Case("clcpp", Language::OpenCLCXX)
2715                 .Case("cuda", Language::CUDA)
2716                 .Case("hip", Language::HIP)
2717                 .Case("c++", Language::CXX)
2718                 .Case("objective-c", Language::ObjC)
2719                 .Case("objective-c++", Language::ObjCXX)
2720                 .Case("renderscript", Language::RenderScript)
2721                 .Default(Language::Unknown);
2722 
2723     // "objc[++]-cpp-output" is an acceptable synonym for
2724     // "objective-c[++]-cpp-output".
2725     if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
2726       DashX = llvm::StringSwitch<InputKind>(XValue)
2727                   .Case("objc", Language::ObjC)
2728                   .Case("objc++", Language::ObjCXX)
2729                   .Default(Language::Unknown);
2730 
2731     // Some special cases cannot be combined with suffixes.
2732     if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
2733       DashX = llvm::StringSwitch<InputKind>(XValue)
2734                   .Case("cpp-output", InputKind(Language::C).getPreprocessed())
2735                   .Case("assembler-with-cpp", Language::Asm)
2736                   .Cases("ast", "pcm", "precompiled-header",
2737                          InputKind(Language::Unknown, InputKind::Precompiled))
2738                   .Case("ir", Language::LLVM_IR)
2739                   .Default(Language::Unknown);
2740 
2741     if (DashX.isUnknown())
2742       Diags.Report(diag::err_drv_invalid_value)
2743         << A->getAsString(Args) << A->getValue();
2744 
2745     if (Preprocessed)
2746       DashX = DashX.getPreprocessed();
2747     if (ModuleMap)
2748       DashX = DashX.withFormat(InputKind::ModuleMap);
2749   }
2750 
2751   // '-' is the default input if none is given.
2752   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
2753   Opts.Inputs.clear();
2754   if (Inputs.empty())
2755     Inputs.push_back("-");
2756   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
2757     InputKind IK = DashX;
2758     if (IK.isUnknown()) {
2759       IK = FrontendOptions::getInputKindForExtension(
2760         StringRef(Inputs[i]).rsplit('.').second);
2761       // FIXME: Warn on this?
2762       if (IK.isUnknown())
2763         IK = Language::C;
2764       // FIXME: Remove this hack.
2765       if (i == 0)
2766         DashX = IK;
2767     }
2768 
2769     bool IsSystem = false;
2770 
2771     // The -emit-module action implicitly takes a module map.
2772     if (Opts.ProgramAction == frontend::GenerateModule &&
2773         IK.getFormat() == InputKind::Source) {
2774       IK = IK.withFormat(InputKind::ModuleMap);
2775       IsSystem = Opts.IsSystemModule;
2776     }
2777 
2778     Opts.Inputs.emplace_back(std::move(Inputs[i]), IK, IsSystem);
2779   }
2780 
2781   Opts.DashX = DashX;
2782 
2783   return Diags.getNumErrors() == NumErrorsBefore;
2784 }
2785 
2786 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
2787                                                  void *MainAddr) {
2788   std::string ClangExecutable =
2789       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
2790   return Driver::GetResourcesPath(ClangExecutable, CLANG_RESOURCE_DIR);
2791 }
2792 
2793 static void GenerateHeaderSearchArgs(HeaderSearchOptions &Opts,
2794                                      SmallVectorImpl<const char *> &Args,
2795                                      CompilerInvocation::StringAllocator SA) {
2796   const HeaderSearchOptions *HeaderSearchOpts = &Opts;
2797 #define HEADER_SEARCH_OPTION_WITH_MARSHALLING(                                 \
2798     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2799     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2800     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2801     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2802   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2803       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2804       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2805 #include "clang/Driver/Options.inc"
2806 #undef HEADER_SEARCH_OPTION_WITH_MARSHALLING
2807 
2808   if (Opts.UseLibcxx)
2809     GenerateArg(Args, OPT_stdlib_EQ, "libc++", SA);
2810 
2811   if (!Opts.ModuleCachePath.empty())
2812     GenerateArg(Args, OPT_fmodules_cache_path, Opts.ModuleCachePath, SA);
2813 
2814   for (const auto &File : Opts.PrebuiltModuleFiles)
2815     GenerateArg(Args, OPT_fmodule_file, File.first + "=" + File.second, SA);
2816 
2817   for (const auto &Path : Opts.PrebuiltModulePaths)
2818     GenerateArg(Args, OPT_fprebuilt_module_path, Path, SA);
2819 
2820   for (const auto &Macro : Opts.ModulesIgnoreMacros)
2821     GenerateArg(Args, OPT_fmodules_ignore_macro, Macro.val(), SA);
2822 
2823   auto Matches = [](const HeaderSearchOptions::Entry &Entry,
2824                     llvm::ArrayRef<frontend::IncludeDirGroup> Groups,
2825                     llvm::Optional<bool> IsFramework,
2826                     llvm::Optional<bool> IgnoreSysRoot) {
2827     return llvm::find(Groups, Entry.Group) != Groups.end() &&
2828            (!IsFramework || (Entry.IsFramework == *IsFramework)) &&
2829            (!IgnoreSysRoot || (Entry.IgnoreSysRoot == *IgnoreSysRoot));
2830   };
2831 
2832   auto It = Opts.UserEntries.begin();
2833   auto End = Opts.UserEntries.end();
2834 
2835   // Add -I..., -F..., and -index-header-map options in order.
2836   for (; It < End &&
2837          Matches(*It, {frontend::IndexHeaderMap, frontend::Angled}, None, true);
2838        ++It) {
2839     OptSpecifier Opt = [It, Matches]() {
2840       if (Matches(*It, frontend::IndexHeaderMap, true, true))
2841         return OPT_F;
2842       if (Matches(*It, frontend::IndexHeaderMap, false, true))
2843         return OPT_I;
2844       if (Matches(*It, frontend::Angled, true, true))
2845         return OPT_F;
2846       if (Matches(*It, frontend::Angled, false, true))
2847         return OPT_I;
2848       llvm_unreachable("Unexpected HeaderSearchOptions::Entry.");
2849     }();
2850 
2851     if (It->Group == frontend::IndexHeaderMap)
2852       GenerateArg(Args, OPT_index_header_map, SA);
2853     GenerateArg(Args, Opt, It->Path, SA);
2854   };
2855 
2856   // Note: some paths that came from "[-iprefix=xx] -iwithprefixbefore=yy" may
2857   // have already been generated as "-I[xx]yy". If that's the case, their
2858   // position on command line was such that this has no semantic impact on
2859   // include paths.
2860   for (; It < End &&
2861          Matches(*It, {frontend::After, frontend::Angled}, false, true);
2862        ++It) {
2863     OptSpecifier Opt =
2864         It->Group == frontend::After ? OPT_iwithprefix : OPT_iwithprefixbefore;
2865     GenerateArg(Args, Opt, It->Path, SA);
2866   }
2867 
2868   // Note: Some paths that came from "-idirafter=xxyy" may have already been
2869   // generated as "-iwithprefix=xxyy". If that's the case, their position on
2870   // command line was such that this has no semantic impact on include paths.
2871   for (; It < End && Matches(*It, {frontend::After}, false, true); ++It)
2872     GenerateArg(Args, OPT_idirafter, It->Path, SA);
2873   for (; It < End && Matches(*It, {frontend::Quoted}, false, true); ++It)
2874     GenerateArg(Args, OPT_iquote, It->Path, SA);
2875   for (; It < End && Matches(*It, {frontend::System}, false, None); ++It)
2876     GenerateArg(Args, It->IgnoreSysRoot ? OPT_isystem : OPT_iwithsysroot,
2877                 It->Path, SA);
2878   for (; It < End && Matches(*It, {frontend::System}, true, true); ++It)
2879     GenerateArg(Args, OPT_iframework, It->Path, SA);
2880   for (; It < End && Matches(*It, {frontend::System}, true, false); ++It)
2881     GenerateArg(Args, OPT_iframeworkwithsysroot, It->Path, SA);
2882 
2883   // Add the paths for the various language specific isystem flags.
2884   for (; It < End && Matches(*It, {frontend::CSystem}, false, true); ++It)
2885     GenerateArg(Args, OPT_c_isystem, It->Path, SA);
2886   for (; It < End && Matches(*It, {frontend::CXXSystem}, false, true); ++It)
2887     GenerateArg(Args, OPT_cxx_isystem, It->Path, SA);
2888   for (; It < End && Matches(*It, {frontend::ObjCSystem}, false, true); ++It)
2889     GenerateArg(Args, OPT_objc_isystem, It->Path, SA);
2890   for (; It < End && Matches(*It, {frontend::ObjCXXSystem}, false, true); ++It)
2891     GenerateArg(Args, OPT_objcxx_isystem, It->Path, SA);
2892 
2893   // Add the internal paths from a driver that detects standard include paths.
2894   // Note: Some paths that came from "-internal-isystem" arguments may have
2895   // already been generated as "-isystem". If that's the case, their position on
2896   // command line was such that this has no semantic impact on include paths.
2897   for (; It < End &&
2898          Matches(*It, {frontend::System, frontend::ExternCSystem}, false, true);
2899        ++It) {
2900     OptSpecifier Opt = It->Group == frontend::System
2901                            ? OPT_internal_isystem
2902                            : OPT_internal_externc_isystem;
2903     GenerateArg(Args, Opt, It->Path, SA);
2904   }
2905 
2906   assert(It == End && "Unhandled HeaderSearchOption::Entry.");
2907 
2908   // Add the path prefixes which are implicitly treated as being system headers.
2909   for (const auto &P : Opts.SystemHeaderPrefixes) {
2910     OptSpecifier Opt = P.IsSystemHeader ? OPT_system_header_prefix
2911                                         : OPT_no_system_header_prefix;
2912     GenerateArg(Args, Opt, P.Prefix, SA);
2913   }
2914 
2915   for (const std::string &F : Opts.VFSOverlayFiles)
2916     GenerateArg(Args, OPT_ivfsoverlay, F, SA);
2917 }
2918 
2919 static bool ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
2920                                   DiagnosticsEngine &Diags,
2921                                   const std::string &WorkingDir) {
2922   unsigned NumErrorsBefore = Diags.getNumErrors();
2923 
2924   HeaderSearchOptions *HeaderSearchOpts = &Opts;
2925 
2926 #define HEADER_SEARCH_OPTION_WITH_MARSHALLING(                                 \
2927     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2928     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2929     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2930     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2931   PARSE_OPTION_WITH_MARSHALLING(                                               \
2932       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2933       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2934 #include "clang/Driver/Options.inc"
2935 #undef HEADER_SEARCH_OPTION_WITH_MARSHALLING
2936 
2937   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
2938     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
2939 
2940   // Canonicalize -fmodules-cache-path before storing it.
2941   SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
2942   if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
2943     if (WorkingDir.empty())
2944       llvm::sys::fs::make_absolute(P);
2945     else
2946       llvm::sys::fs::make_absolute(WorkingDir, P);
2947   }
2948   llvm::sys::path::remove_dots(P);
2949   Opts.ModuleCachePath = std::string(P.str());
2950 
2951   // Only the -fmodule-file=<name>=<file> form.
2952   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2953     StringRef Val = A->getValue();
2954     if (Val.find('=') != StringRef::npos){
2955       auto Split = Val.split('=');
2956       Opts.PrebuiltModuleFiles.insert(
2957           {std::string(Split.first), std::string(Split.second)});
2958     }
2959   }
2960   for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
2961     Opts.AddPrebuiltModulePath(A->getValue());
2962 
2963   for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
2964     StringRef MacroDef = A->getValue();
2965     Opts.ModulesIgnoreMacros.insert(
2966         llvm::CachedHashString(MacroDef.split('=').first));
2967   }
2968 
2969   // Add -I..., -F..., and -index-header-map options in order.
2970   bool IsIndexHeaderMap = false;
2971   bool IsSysrootSpecified =
2972       Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
2973   for (const auto *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
2974     if (A->getOption().matches(OPT_index_header_map)) {
2975       // -index-header-map applies to the next -I or -F.
2976       IsIndexHeaderMap = true;
2977       continue;
2978     }
2979 
2980     frontend::IncludeDirGroup Group =
2981         IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
2982 
2983     bool IsFramework = A->getOption().matches(OPT_F);
2984     std::string Path = A->getValue();
2985 
2986     if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
2987       SmallString<32> Buffer;
2988       llvm::sys::path::append(Buffer, Opts.Sysroot,
2989                               llvm::StringRef(A->getValue()).substr(1));
2990       Path = std::string(Buffer.str());
2991     }
2992 
2993     Opts.AddPath(Path, Group, IsFramework,
2994                  /*IgnoreSysroot*/ true);
2995     IsIndexHeaderMap = false;
2996   }
2997 
2998   // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
2999   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
3000   for (const auto *A :
3001        Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
3002     if (A->getOption().matches(OPT_iprefix))
3003       Prefix = A->getValue();
3004     else if (A->getOption().matches(OPT_iwithprefix))
3005       Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
3006     else
3007       Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
3008   }
3009 
3010   for (const auto *A : Args.filtered(OPT_idirafter))
3011     Opts.AddPath(A->getValue(), frontend::After, false, true);
3012   for (const auto *A : Args.filtered(OPT_iquote))
3013     Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
3014   for (const auto *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
3015     Opts.AddPath(A->getValue(), frontend::System, false,
3016                  !A->getOption().matches(OPT_iwithsysroot));
3017   for (const auto *A : Args.filtered(OPT_iframework))
3018     Opts.AddPath(A->getValue(), frontend::System, true, true);
3019   for (const auto *A : Args.filtered(OPT_iframeworkwithsysroot))
3020     Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
3021                  /*IgnoreSysRoot=*/false);
3022 
3023   // Add the paths for the various language specific isystem flags.
3024   for (const auto *A : Args.filtered(OPT_c_isystem))
3025     Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
3026   for (const auto *A : Args.filtered(OPT_cxx_isystem))
3027     Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
3028   for (const auto *A : Args.filtered(OPT_objc_isystem))
3029     Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
3030   for (const auto *A : Args.filtered(OPT_objcxx_isystem))
3031     Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
3032 
3033   // Add the internal paths from a driver that detects standard include paths.
3034   for (const auto *A :
3035        Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
3036     frontend::IncludeDirGroup Group = frontend::System;
3037     if (A->getOption().matches(OPT_internal_externc_isystem))
3038       Group = frontend::ExternCSystem;
3039     Opts.AddPath(A->getValue(), Group, false, true);
3040   }
3041 
3042   // Add the path prefixes which are implicitly treated as being system headers.
3043   for (const auto *A :
3044        Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
3045     Opts.AddSystemHeaderPrefix(
3046         A->getValue(), A->getOption().matches(OPT_system_header_prefix));
3047 
3048   for (const auto *A : Args.filtered(OPT_ivfsoverlay))
3049     Opts.AddVFSOverlayFile(A->getValue());
3050 
3051   return Diags.getNumErrors() == NumErrorsBefore;
3052 }
3053 
3054 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
3055                                          const llvm::Triple &T,
3056                                          std::vector<std::string> &Includes,
3057                                          LangStandard::Kind LangStd) {
3058   // Set some properties which depend solely on the input kind; it would be nice
3059   // to move these to the language standard, and have the driver resolve the
3060   // input kind + language standard.
3061   //
3062   // FIXME: Perhaps a better model would be for a single source file to have
3063   // multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
3064   // simultaneously active?
3065   if (IK.getLanguage() == Language::Asm) {
3066     Opts.AsmPreprocessor = 1;
3067   } else if (IK.isObjectiveC()) {
3068     Opts.ObjC = 1;
3069   }
3070 
3071   if (LangStd == LangStandard::lang_unspecified) {
3072     // Based on the base language, pick one.
3073     switch (IK.getLanguage()) {
3074     case Language::Unknown:
3075     case Language::LLVM_IR:
3076       llvm_unreachable("Invalid input kind!");
3077     case Language::OpenCL:
3078       LangStd = LangStandard::lang_opencl10;
3079       break;
3080     case Language::OpenCLCXX:
3081       LangStd = LangStandard::lang_openclcpp;
3082       break;
3083     case Language::CUDA:
3084       LangStd = LangStandard::lang_cuda;
3085       break;
3086     case Language::Asm:
3087     case Language::C:
3088 #if defined(CLANG_DEFAULT_STD_C)
3089       LangStd = CLANG_DEFAULT_STD_C;
3090 #else
3091       // The PS4 uses C99 as the default C standard.
3092       if (T.isPS4())
3093         LangStd = LangStandard::lang_gnu99;
3094       else
3095         LangStd = LangStandard::lang_gnu17;
3096 #endif
3097       break;
3098     case Language::ObjC:
3099 #if defined(CLANG_DEFAULT_STD_C)
3100       LangStd = CLANG_DEFAULT_STD_C;
3101 #else
3102       LangStd = LangStandard::lang_gnu11;
3103 #endif
3104       break;
3105     case Language::CXX:
3106     case Language::ObjCXX:
3107 #if defined(CLANG_DEFAULT_STD_CXX)
3108       LangStd = CLANG_DEFAULT_STD_CXX;
3109 #else
3110       LangStd = LangStandard::lang_gnucxx14;
3111 #endif
3112       break;
3113     case Language::RenderScript:
3114       LangStd = LangStandard::lang_c99;
3115       break;
3116     case Language::HIP:
3117       LangStd = LangStandard::lang_hip;
3118       break;
3119     }
3120   }
3121 
3122   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
3123   Opts.LangStd = LangStd;
3124   Opts.LineComment = Std.hasLineComments();
3125   Opts.C99 = Std.isC99();
3126   Opts.C11 = Std.isC11();
3127   Opts.C17 = Std.isC17();
3128   Opts.C2x = Std.isC2x();
3129   Opts.CPlusPlus = Std.isCPlusPlus();
3130   Opts.CPlusPlus11 = Std.isCPlusPlus11();
3131   Opts.CPlusPlus14 = Std.isCPlusPlus14();
3132   Opts.CPlusPlus17 = Std.isCPlusPlus17();
3133   Opts.CPlusPlus20 = Std.isCPlusPlus20();
3134   Opts.CPlusPlus2b = Std.isCPlusPlus2b();
3135   Opts.GNUMode = Std.isGNUMode();
3136   Opts.GNUCVersion = 0;
3137   Opts.HexFloats = Std.hasHexFloats();
3138   Opts.ImplicitInt = Std.hasImplicitInt();
3139 
3140   Opts.CPlusPlusModules = Opts.CPlusPlus20;
3141 
3142   // Set OpenCL Version.
3143   Opts.OpenCL = Std.isOpenCL();
3144   if (LangStd == LangStandard::lang_opencl10)
3145     Opts.OpenCLVersion = 100;
3146   else if (LangStd == LangStandard::lang_opencl11)
3147     Opts.OpenCLVersion = 110;
3148   else if (LangStd == LangStandard::lang_opencl12)
3149     Opts.OpenCLVersion = 120;
3150   else if (LangStd == LangStandard::lang_opencl20)
3151     Opts.OpenCLVersion = 200;
3152   else if (LangStd == LangStandard::lang_opencl30)
3153     Opts.OpenCLVersion = 300;
3154   else if (LangStd == LangStandard::lang_openclcpp)
3155     Opts.OpenCLCPlusPlusVersion = 100;
3156 
3157   // OpenCL has some additional defaults.
3158   if (Opts.OpenCL) {
3159     Opts.AltiVec = 0;
3160     Opts.ZVector = 0;
3161     Opts.setDefaultFPContractMode(LangOptions::FPM_On);
3162     Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
3163     Opts.OpenCLPipe = Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
3164     Opts.OpenCLGenericAddressSpace =
3165         Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
3166 
3167     // Include default header file for OpenCL.
3168     if (Opts.IncludeDefaultHeader) {
3169       if (Opts.DeclareOpenCLBuiltins) {
3170         // Only include base header file for builtin types and constants.
3171         Includes.push_back("opencl-c-base.h");
3172       } else {
3173         Includes.push_back("opencl-c.h");
3174       }
3175     }
3176   }
3177 
3178   Opts.HIP = IK.getLanguage() == Language::HIP;
3179   Opts.CUDA = IK.getLanguage() == Language::CUDA || Opts.HIP;
3180   if (Opts.HIP) {
3181     // HIP toolchain does not support 'Fast' FPOpFusion in backends since it
3182     // fuses multiplication/addition instructions without contract flag from
3183     // device library functions in LLVM bitcode, which causes accuracy loss in
3184     // certain math functions, e.g. tan(-1e20) becomes -0.933 instead of 0.8446.
3185     // For device library functions in bitcode to work, 'Strict' or 'Standard'
3186     // FPOpFusion options in backends is needed. Therefore 'fast-honor-pragmas'
3187     // FP contract option is used to allow fuse across statements in frontend
3188     // whereas respecting contract flag in backend.
3189     Opts.setDefaultFPContractMode(LangOptions::FPM_FastHonorPragmas);
3190   } else if (Opts.CUDA) {
3191     // Allow fuse across statements disregarding pragmas.
3192     Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3193   }
3194 
3195   Opts.RenderScript = IK.getLanguage() == Language::RenderScript;
3196 
3197   // OpenCL and C++ both have bool, true, false keywords.
3198   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
3199 
3200   // OpenCL has half keyword
3201   Opts.Half = Opts.OpenCL;
3202 }
3203 
3204 /// Check if input file kind and language standard are compatible.
3205 static bool IsInputCompatibleWithStandard(InputKind IK,
3206                                           const LangStandard &S) {
3207   switch (IK.getLanguage()) {
3208   case Language::Unknown:
3209   case Language::LLVM_IR:
3210     llvm_unreachable("should not parse language flags for this input");
3211 
3212   case Language::C:
3213   case Language::ObjC:
3214   case Language::RenderScript:
3215     return S.getLanguage() == Language::C;
3216 
3217   case Language::OpenCL:
3218     return S.getLanguage() == Language::OpenCL ||
3219            S.getLanguage() == Language::OpenCLCXX;
3220 
3221   case Language::OpenCLCXX:
3222     return S.getLanguage() == Language::OpenCLCXX;
3223 
3224   case Language::CXX:
3225   case Language::ObjCXX:
3226     return S.getLanguage() == Language::CXX;
3227 
3228   case Language::CUDA:
3229     // FIXME: What -std= values should be permitted for CUDA compilations?
3230     return S.getLanguage() == Language::CUDA ||
3231            S.getLanguage() == Language::CXX;
3232 
3233   case Language::HIP:
3234     return S.getLanguage() == Language::CXX || S.getLanguage() == Language::HIP;
3235 
3236   case Language::Asm:
3237     // Accept (and ignore) all -std= values.
3238     // FIXME: The -std= value is not ignored; it affects the tokenization
3239     // and preprocessing rules if we're preprocessing this asm input.
3240     return true;
3241   }
3242 
3243   llvm_unreachable("unexpected input language");
3244 }
3245 
3246 /// Get language name for given input kind.
3247 static const StringRef GetInputKindName(InputKind IK) {
3248   switch (IK.getLanguage()) {
3249   case Language::C:
3250     return "C";
3251   case Language::ObjC:
3252     return "Objective-C";
3253   case Language::CXX:
3254     return "C++";
3255   case Language::ObjCXX:
3256     return "Objective-C++";
3257   case Language::OpenCL:
3258     return "OpenCL";
3259   case Language::OpenCLCXX:
3260     return "C++ for OpenCL";
3261   case Language::CUDA:
3262     return "CUDA";
3263   case Language::RenderScript:
3264     return "RenderScript";
3265   case Language::HIP:
3266     return "HIP";
3267 
3268   case Language::Asm:
3269     return "Asm";
3270   case Language::LLVM_IR:
3271     return "LLVM IR";
3272 
3273   case Language::Unknown:
3274     break;
3275   }
3276   llvm_unreachable("unknown input language");
3277 }
3278 
3279 void CompilerInvocation::GenerateLangArgs(const LangOptions &Opts,
3280                                           SmallVectorImpl<const char *> &Args,
3281                                           StringAllocator SA,
3282                                           const llvm::Triple &T, InputKind IK) {
3283   if (IK.getFormat() == InputKind::Precompiled ||
3284       IK.getLanguage() == Language::LLVM_IR) {
3285     if (Opts.ObjCAutoRefCount)
3286       GenerateArg(Args, OPT_fobjc_arc, SA);
3287     if (Opts.PICLevel != 0)
3288       GenerateArg(Args, OPT_pic_level, Twine(Opts.PICLevel), SA);
3289     if (Opts.PIE)
3290       GenerateArg(Args, OPT_pic_is_pie, SA);
3291     for (StringRef Sanitizer : serializeSanitizerKinds(Opts.Sanitize))
3292       GenerateArg(Args, OPT_fsanitize_EQ, Sanitizer, SA);
3293 
3294     return;
3295   }
3296 
3297   OptSpecifier StdOpt;
3298   switch (Opts.LangStd) {
3299   case LangStandard::lang_opencl10:
3300   case LangStandard::lang_opencl11:
3301   case LangStandard::lang_opencl12:
3302   case LangStandard::lang_opencl20:
3303   case LangStandard::lang_opencl30:
3304   case LangStandard::lang_openclcpp:
3305     StdOpt = OPT_cl_std_EQ;
3306     break;
3307   default:
3308     StdOpt = OPT_std_EQ;
3309     break;
3310   }
3311 
3312   auto LangStandard = LangStandard::getLangStandardForKind(Opts.LangStd);
3313   GenerateArg(Args, StdOpt, LangStandard.getName(), SA);
3314 
3315   if (Opts.IncludeDefaultHeader)
3316     GenerateArg(Args, OPT_finclude_default_header, SA);
3317   if (Opts.DeclareOpenCLBuiltins)
3318     GenerateArg(Args, OPT_fdeclare_opencl_builtins, SA);
3319 
3320   const LangOptions *LangOpts = &Opts;
3321 
3322 #define LANG_OPTION_WITH_MARSHALLING(                                          \
3323     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3324     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3325     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3326     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3327   GENERATE_OPTION_WITH_MARSHALLING(                                            \
3328       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
3329       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
3330 #include "clang/Driver/Options.inc"
3331 #undef LANG_OPTION_WITH_MARSHALLING
3332 
3333   // The '-fcf-protection=' option is generated by CodeGenOpts generator.
3334 
3335   if (Opts.ObjC) {
3336     GenerateArg(Args, OPT_fobjc_runtime_EQ, Opts.ObjCRuntime.getAsString(), SA);
3337 
3338     if (Opts.GC == LangOptions::GCOnly)
3339       GenerateArg(Args, OPT_fobjc_gc_only, SA);
3340     else if (Opts.GC == LangOptions::HybridGC)
3341       GenerateArg(Args, OPT_fobjc_gc, SA);
3342     else if (Opts.ObjCAutoRefCount == 1)
3343       GenerateArg(Args, OPT_fobjc_arc, SA);
3344 
3345     if (Opts.ObjCWeakRuntime)
3346       GenerateArg(Args, OPT_fobjc_runtime_has_weak, SA);
3347 
3348     if (Opts.ObjCWeak)
3349       GenerateArg(Args, OPT_fobjc_weak, SA);
3350 
3351     if (Opts.ObjCSubscriptingLegacyRuntime)
3352       GenerateArg(Args, OPT_fobjc_subscripting_legacy_runtime, SA);
3353   }
3354 
3355   if (Opts.GNUCVersion != 0) {
3356     unsigned Major = Opts.GNUCVersion / 100 / 100;
3357     unsigned Minor = (Opts.GNUCVersion / 100) % 100;
3358     unsigned Patch = Opts.GNUCVersion % 100;
3359     GenerateArg(Args, OPT_fgnuc_version_EQ,
3360                 Twine(Major) + "." + Twine(Minor) + "." + Twine(Patch), SA);
3361   }
3362 
3363   if (Opts.IgnoreXCOFFVisibility)
3364     GenerateArg(Args, OPT_mignore_xcoff_visibility, SA);
3365 
3366   if (Opts.SignedOverflowBehavior == LangOptions::SOB_Trapping) {
3367     GenerateArg(Args, OPT_ftrapv, SA);
3368     GenerateArg(Args, OPT_ftrapv_handler, Opts.OverflowHandler, SA);
3369   } else if (Opts.SignedOverflowBehavior == LangOptions::SOB_Defined) {
3370     GenerateArg(Args, OPT_fwrapv, SA);
3371   }
3372 
3373   if (Opts.MSCompatibilityVersion != 0) {
3374     unsigned Major = Opts.MSCompatibilityVersion / 10000000;
3375     unsigned Minor = (Opts.MSCompatibilityVersion / 100000) % 100;
3376     unsigned Subminor = Opts.MSCompatibilityVersion % 100000;
3377     GenerateArg(Args, OPT_fms_compatibility_version,
3378                 Twine(Major) + "." + Twine(Minor) + "." + Twine(Subminor), SA);
3379   }
3380 
3381   if ((!Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17) || T.isOSzOS()) {
3382     if (!Opts.Trigraphs)
3383       GenerateArg(Args, OPT_fno_trigraphs, SA);
3384   } else {
3385     if (Opts.Trigraphs)
3386       GenerateArg(Args, OPT_ftrigraphs, SA);
3387   }
3388 
3389   if (Opts.Blocks && !(Opts.OpenCL && Opts.OpenCLVersion == 200))
3390     GenerateArg(Args, OPT_fblocks, SA);
3391 
3392   if (Opts.ConvergentFunctions &&
3393       !(Opts.OpenCL || (Opts.CUDA && Opts.CUDAIsDevice) || Opts.SYCLIsDevice))
3394     GenerateArg(Args, OPT_fconvergent_functions, SA);
3395 
3396   if (Opts.NoBuiltin && !Opts.Freestanding)
3397     GenerateArg(Args, OPT_fno_builtin, SA);
3398 
3399   if (!Opts.NoBuiltin)
3400     for (const auto &Func : Opts.NoBuiltinFuncs)
3401       GenerateArg(Args, OPT_fno_builtin_, Func, SA);
3402 
3403   if (Opts.LongDoubleSize == 128)
3404     GenerateArg(Args, OPT_mlong_double_128, SA);
3405   else if (Opts.LongDoubleSize == 64)
3406     GenerateArg(Args, OPT_mlong_double_64, SA);
3407 
3408   // Not generating '-mrtd', it's just an alias for '-fdefault-calling-conv='.
3409 
3410   // OpenMP was requested via '-fopenmp', not implied by '-fopenmp-simd' or
3411   // '-fopenmp-targets='.
3412   if (Opts.OpenMP && !Opts.OpenMPSimd) {
3413     GenerateArg(Args, OPT_fopenmp, SA);
3414 
3415     if (Opts.OpenMP != 50)
3416       GenerateArg(Args, OPT_fopenmp_version_EQ, Twine(Opts.OpenMP), SA);
3417 
3418     if (!Opts.OpenMPUseTLS)
3419       GenerateArg(Args, OPT_fnoopenmp_use_tls, SA);
3420 
3421     if (Opts.OpenMPIsDevice)
3422       GenerateArg(Args, OPT_fopenmp_is_device, SA);
3423 
3424     if (Opts.OpenMPIRBuilder)
3425       GenerateArg(Args, OPT_fopenmp_enable_irbuilder, SA);
3426   }
3427 
3428   if (Opts.OpenMPSimd) {
3429     GenerateArg(Args, OPT_fopenmp_simd, SA);
3430 
3431     if (Opts.OpenMP != 50)
3432       GenerateArg(Args, OPT_fopenmp_version_EQ, Twine(Opts.OpenMP), SA);
3433   }
3434 
3435   if (Opts.OpenMPCUDANumSMs != 0)
3436     GenerateArg(Args, OPT_fopenmp_cuda_number_of_sm_EQ,
3437                 Twine(Opts.OpenMPCUDANumSMs), SA);
3438 
3439   if (Opts.OpenMPCUDABlocksPerSM != 0)
3440     GenerateArg(Args, OPT_fopenmp_cuda_blocks_per_sm_EQ,
3441                 Twine(Opts.OpenMPCUDABlocksPerSM), SA);
3442 
3443   if (Opts.OpenMPCUDAReductionBufNum != 1024)
3444     GenerateArg(Args, OPT_fopenmp_cuda_teams_reduction_recs_num_EQ,
3445                 Twine(Opts.OpenMPCUDAReductionBufNum), SA);
3446 
3447   if (!Opts.OMPTargetTriples.empty()) {
3448     std::string Targets;
3449     llvm::raw_string_ostream OS(Targets);
3450     llvm::interleave(
3451         Opts.OMPTargetTriples, OS,
3452         [&OS](const llvm::Triple &T) { OS << T.str(); }, ",");
3453     GenerateArg(Args, OPT_fopenmp_targets_EQ, OS.str(), SA);
3454   }
3455 
3456   if (!Opts.OMPHostIRFile.empty())
3457     GenerateArg(Args, OPT_fopenmp_host_ir_file_path, Opts.OMPHostIRFile, SA);
3458 
3459   if (Opts.OpenMPCUDAMode)
3460     GenerateArg(Args, OPT_fopenmp_cuda_mode, SA);
3461 
3462   if (Opts.OpenMPCUDATargetParallel)
3463     GenerateArg(Args, OPT_fopenmp_cuda_parallel_target_regions, SA);
3464 
3465   if (Opts.OpenMPCUDAForceFullRuntime)
3466     GenerateArg(Args, OPT_fopenmp_cuda_force_full_runtime, SA);
3467 
3468   // The arguments used to set Optimize, OptimizeSize and NoInlineDefine are
3469   // generated from CodeGenOptions.
3470 
3471   if (Opts.DefaultFPContractMode == LangOptions::FPM_Fast)
3472     GenerateArg(Args, OPT_ffp_contract, "fast", SA);
3473   else if (Opts.DefaultFPContractMode == LangOptions::FPM_On)
3474     GenerateArg(Args, OPT_ffp_contract, "on", SA);
3475   else if (Opts.DefaultFPContractMode == LangOptions::FPM_Off)
3476     GenerateArg(Args, OPT_ffp_contract, "off", SA);
3477   else if (Opts.DefaultFPContractMode == LangOptions::FPM_FastHonorPragmas)
3478     GenerateArg(Args, OPT_ffp_contract, "fast-honor-pragmas", SA);
3479 
3480   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.Sanitize))
3481     GenerateArg(Args, OPT_fsanitize_EQ, Sanitizer, SA);
3482 
3483   // Conflating '-fsanitize-system-blacklist' and '-fsanitize-blacklist'.
3484   for (const std::string &F : Opts.NoSanitizeFiles)
3485     GenerateArg(Args, OPT_fsanitize_blacklist, F, SA);
3486 
3487   if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver3_8)
3488     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "3.8", SA);
3489   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver4)
3490     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "4.0", SA);
3491   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver6)
3492     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "6.0", SA);
3493   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver7)
3494     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "7.0", SA);
3495   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver9)
3496     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "9.0", SA);
3497   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver11)
3498     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "11.0", SA);
3499 
3500   if (Opts.getSignReturnAddressScope() ==
3501       LangOptions::SignReturnAddressScopeKind::All)
3502     GenerateArg(Args, OPT_msign_return_address_EQ, "all", SA);
3503   else if (Opts.getSignReturnAddressScope() ==
3504            LangOptions::SignReturnAddressScopeKind::NonLeaf)
3505     GenerateArg(Args, OPT_msign_return_address_EQ, "non-leaf", SA);
3506 
3507   if (Opts.getSignReturnAddressKey() ==
3508       LangOptions::SignReturnAddressKeyKind::BKey)
3509     GenerateArg(Args, OPT_msign_return_address_key_EQ, "b_key", SA);
3510 }
3511 
3512 bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
3513                                        InputKind IK, const llvm::Triple &T,
3514                                        std::vector<std::string> &Includes,
3515                                        DiagnosticsEngine &Diags) {
3516   unsigned NumErrorsBefore = Diags.getNumErrors();
3517 
3518   if (IK.getFormat() == InputKind::Precompiled ||
3519       IK.getLanguage() == Language::LLVM_IR) {
3520     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
3521     // PassManager in BackendUtil.cpp. They need to be initialized no matter
3522     // what the input type is.
3523     if (Args.hasArg(OPT_fobjc_arc))
3524       Opts.ObjCAutoRefCount = 1;
3525     // PICLevel and PIELevel are needed during code generation and this should
3526     // be set regardless of the input type.
3527     Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
3528     Opts.PIE = Args.hasArg(OPT_pic_is_pie);
3529     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3530                         Diags, Opts.Sanitize);
3531 
3532     return Diags.getNumErrors() == NumErrorsBefore;
3533   }
3534 
3535   // Other LangOpts are only initialized when the input is not AST or LLVM IR.
3536   // FIXME: Should we really be parsing this for an Language::Asm input?
3537 
3538   // FIXME: Cleanup per-file based stuff.
3539   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
3540   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
3541     LangStd = LangStandard::getLangKind(A->getValue());
3542     if (LangStd == LangStandard::lang_unspecified) {
3543       Diags.Report(diag::err_drv_invalid_value)
3544         << A->getAsString(Args) << A->getValue();
3545       // Report supported standards with short description.
3546       for (unsigned KindValue = 0;
3547            KindValue != LangStandard::lang_unspecified;
3548            ++KindValue) {
3549         const LangStandard &Std = LangStandard::getLangStandardForKind(
3550           static_cast<LangStandard::Kind>(KindValue));
3551         if (IsInputCompatibleWithStandard(IK, Std)) {
3552           auto Diag = Diags.Report(diag::note_drv_use_standard);
3553           Diag << Std.getName() << Std.getDescription();
3554           unsigned NumAliases = 0;
3555 #define LANGSTANDARD(id, name, lang, desc, features)
3556 #define LANGSTANDARD_ALIAS(id, alias) \
3557           if (KindValue == LangStandard::lang_##id) ++NumAliases;
3558 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
3559 #include "clang/Basic/LangStandards.def"
3560           Diag << NumAliases;
3561 #define LANGSTANDARD(id, name, lang, desc, features)
3562 #define LANGSTANDARD_ALIAS(id, alias) \
3563           if (KindValue == LangStandard::lang_##id) Diag << alias;
3564 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
3565 #include "clang/Basic/LangStandards.def"
3566         }
3567       }
3568     } else {
3569       // Valid standard, check to make sure language and standard are
3570       // compatible.
3571       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
3572       if (!IsInputCompatibleWithStandard(IK, Std)) {
3573         Diags.Report(diag::err_drv_argument_not_allowed_with)
3574           << A->getAsString(Args) << GetInputKindName(IK);
3575       }
3576     }
3577   }
3578 
3579   // -cl-std only applies for OpenCL language standards.
3580   // Override the -std option in this case.
3581   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
3582     LangStandard::Kind OpenCLLangStd
3583       = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
3584         .Cases("cl", "CL", LangStandard::lang_opencl10)
3585         .Cases("cl1.0", "CL1.0", LangStandard::lang_opencl10)
3586         .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
3587         .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
3588         .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
3589         .Cases("cl3.0", "CL3.0", LangStandard::lang_opencl30)
3590         .Cases("clc++", "CLC++", LangStandard::lang_openclcpp)
3591         .Default(LangStandard::lang_unspecified);
3592 
3593     if (OpenCLLangStd == LangStandard::lang_unspecified) {
3594       Diags.Report(diag::err_drv_invalid_value)
3595         << A->getAsString(Args) << A->getValue();
3596     }
3597     else
3598       LangStd = OpenCLLangStd;
3599   }
3600 
3601   // These need to be parsed now. They are used to set OpenCL defaults.
3602   Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
3603   Opts.DeclareOpenCLBuiltins = Args.hasArg(OPT_fdeclare_opencl_builtins);
3604 
3605   CompilerInvocation::setLangDefaults(Opts, IK, T, Includes, LangStd);
3606 
3607   // The key paths of codegen options defined in Options.td start with
3608   // "LangOpts->". Let's provide the expected variable name and type.
3609   LangOptions *LangOpts = &Opts;
3610 
3611 #define LANG_OPTION_WITH_MARSHALLING(                                          \
3612     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3613     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3614     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3615     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3616   PARSE_OPTION_WITH_MARSHALLING(                                               \
3617       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
3618       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
3619 #include "clang/Driver/Options.inc"
3620 #undef LANG_OPTION_WITH_MARSHALLING
3621 
3622   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
3623     StringRef Name = A->getValue();
3624     if (Name == "full" || Name == "branch") {
3625       Opts.CFProtectionBranch = 1;
3626     }
3627   }
3628 
3629   if (Opts.ObjC) {
3630     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
3631       StringRef value = arg->getValue();
3632       if (Opts.ObjCRuntime.tryParse(value))
3633         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
3634     }
3635 
3636     if (Args.hasArg(OPT_fobjc_gc_only))
3637       Opts.setGC(LangOptions::GCOnly);
3638     else if (Args.hasArg(OPT_fobjc_gc))
3639       Opts.setGC(LangOptions::HybridGC);
3640     else if (Args.hasArg(OPT_fobjc_arc)) {
3641       Opts.ObjCAutoRefCount = 1;
3642       if (!Opts.ObjCRuntime.allowsARC())
3643         Diags.Report(diag::err_arc_unsupported_on_runtime);
3644     }
3645 
3646     // ObjCWeakRuntime tracks whether the runtime supports __weak, not
3647     // whether the feature is actually enabled.  This is predominantly
3648     // determined by -fobjc-runtime, but we allow it to be overridden
3649     // from the command line for testing purposes.
3650     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
3651       Opts.ObjCWeakRuntime = 1;
3652     else
3653       Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
3654 
3655     // ObjCWeak determines whether __weak is actually enabled.
3656     // Note that we allow -fno-objc-weak to disable this even in ARC mode.
3657     if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
3658       if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
3659         assert(!Opts.ObjCWeak);
3660       } else if (Opts.getGC() != LangOptions::NonGC) {
3661         Diags.Report(diag::err_objc_weak_with_gc);
3662       } else if (!Opts.ObjCWeakRuntime) {
3663         Diags.Report(diag::err_objc_weak_unsupported);
3664       } else {
3665         Opts.ObjCWeak = 1;
3666       }
3667     } else if (Opts.ObjCAutoRefCount) {
3668       Opts.ObjCWeak = Opts.ObjCWeakRuntime;
3669     }
3670 
3671     if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
3672       Opts.ObjCSubscriptingLegacyRuntime =
3673         (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
3674   }
3675 
3676   if (Arg *A = Args.getLastArg(options::OPT_fgnuc_version_EQ)) {
3677     // Check that the version has 1 to 3 components and the minor and patch
3678     // versions fit in two decimal digits.
3679     VersionTuple GNUCVer;
3680     bool Invalid = GNUCVer.tryParse(A->getValue());
3681     unsigned Major = GNUCVer.getMajor();
3682     unsigned Minor = GNUCVer.getMinor().getValueOr(0);
3683     unsigned Patch = GNUCVer.getSubminor().getValueOr(0);
3684     if (Invalid || GNUCVer.getBuild() || Minor >= 100 || Patch >= 100) {
3685       Diags.Report(diag::err_drv_invalid_value)
3686           << A->getAsString(Args) << A->getValue();
3687     }
3688     Opts.GNUCVersion = Major * 100 * 100 + Minor * 100 + Patch;
3689   }
3690 
3691   // In AIX OS, the -mignore-xcoff-visibility is enable by default if there is
3692   // no -fvisibility=* option.
3693   // This is the reason why '-fvisibility' needs to be always generated:
3694   // its absence implies '-mignore-xcoff-visibility'.
3695   //
3696   // Suppose the original cc1 command line does contain '-fvisibility default':
3697   // '-mignore-xcoff-visibility' should not be implied.
3698   // * If '-fvisibility' is not generated (as most options with default values
3699   //   don't), its absence would imply '-mignore-xcoff-visibility'. This changes
3700   //   the command line semantics.
3701   // * If '-fvisibility' is generated regardless of its presence and value,
3702   //   '-mignore-xcoff-visibility' won't be implied and the command line
3703   //   semantics are kept intact.
3704   //
3705   // When the original cc1 command line does **not** contain '-fvisibility',
3706   // '-mignore-xcoff-visibility' is implied. The generated command line will
3707   // contain both '-fvisibility default' and '-mignore-xcoff-visibility' and
3708   // subsequent calls to `CreateFromArgs`/`generateCC1CommandLine` will always
3709   // produce the same arguments.
3710 
3711   if (T.isOSAIX() && (Args.hasArg(OPT_mignore_xcoff_visibility) ||
3712                       !Args.hasArg(OPT_fvisibility)))
3713     Opts.IgnoreXCOFFVisibility = 1;
3714 
3715   if (Args.hasArg(OPT_ftrapv)) {
3716     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
3717     // Set the handler, if one is specified.
3718     Opts.OverflowHandler =
3719         std::string(Args.getLastArgValue(OPT_ftrapv_handler));
3720   }
3721   else if (Args.hasArg(OPT_fwrapv))
3722     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
3723 
3724   Opts.MSCompatibilityVersion = 0;
3725   if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
3726     VersionTuple VT;
3727     if (VT.tryParse(A->getValue()))
3728       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
3729                                                 << A->getValue();
3730     Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
3731                                   VT.getMinor().getValueOr(0) * 100000 +
3732                                   VT.getSubminor().getValueOr(0);
3733   }
3734 
3735   // Mimicking gcc's behavior, trigraphs are only enabled if -trigraphs
3736   // is specified, or -std is set to a conforming mode.
3737   // Trigraphs are disabled by default in c++1z onwards.
3738   // For z/OS, trigraphs are enabled by default (without regard to the above).
3739   Opts.Trigraphs =
3740       (!Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17) || T.isOSzOS();
3741   Opts.Trigraphs =
3742       Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
3743 
3744   Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
3745     && Opts.OpenCLVersion == 200);
3746 
3747   Opts.ConvergentFunctions = Opts.OpenCL || (Opts.CUDA && Opts.CUDAIsDevice) ||
3748                              Opts.SYCLIsDevice ||
3749                              Args.hasArg(OPT_fconvergent_functions);
3750 
3751   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
3752   if (!Opts.NoBuiltin)
3753     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
3754   Opts.LongDoubleSize = Args.hasArg(OPT_mlong_double_128)
3755                             ? 128
3756                             : Args.hasArg(OPT_mlong_double_64) ? 64 : 0;
3757   if (Opts.FastRelaxedMath)
3758     Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3759   llvm::sort(Opts.ModuleFeatures);
3760 
3761   // -mrtd option
3762   if (Arg *A = Args.getLastArg(OPT_mrtd)) {
3763     if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
3764       Diags.Report(diag::err_drv_argument_not_allowed_with)
3765           << A->getSpelling() << "-fdefault-calling-conv";
3766     else {
3767       if (T.getArch() != llvm::Triple::x86)
3768         Diags.Report(diag::err_drv_argument_not_allowed_with)
3769             << A->getSpelling() << T.getTriple();
3770       else
3771         Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
3772     }
3773   }
3774 
3775   // Check if -fopenmp is specified and set default version to 5.0.
3776   Opts.OpenMP = Args.hasArg(OPT_fopenmp) ? 50 : 0;
3777   // Check if -fopenmp-simd is specified.
3778   bool IsSimdSpecified =
3779       Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
3780                    /*Default=*/false);
3781   Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
3782   Opts.OpenMPUseTLS =
3783       Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
3784   Opts.OpenMPIsDevice =
3785       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
3786   Opts.OpenMPIRBuilder =
3787       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_enable_irbuilder);
3788   bool IsTargetSpecified =
3789       Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
3790 
3791   Opts.ConvergentFunctions = Opts.ConvergentFunctions || Opts.OpenMPIsDevice;
3792 
3793   if (Opts.OpenMP || Opts.OpenMPSimd) {
3794     if (int Version = getLastArgIntValue(
3795             Args, OPT_fopenmp_version_EQ,
3796             (IsSimdSpecified || IsTargetSpecified) ? 50 : Opts.OpenMP, Diags))
3797       Opts.OpenMP = Version;
3798     // Provide diagnostic when a given target is not expected to be an OpenMP
3799     // device or host.
3800     if (!Opts.OpenMPIsDevice) {
3801       switch (T.getArch()) {
3802       default:
3803         break;
3804       // Add unsupported host targets here:
3805       case llvm::Triple::nvptx:
3806       case llvm::Triple::nvptx64:
3807         Diags.Report(diag::err_drv_omp_host_target_not_supported) << T.str();
3808         break;
3809       }
3810     }
3811   }
3812 
3813   // Set the flag to prevent the implementation from emitting device exception
3814   // handling code for those requiring so.
3815   if ((Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN())) ||
3816       Opts.OpenCLCPlusPlus) {
3817     Opts.Exceptions = 0;
3818     Opts.CXXExceptions = 0;
3819   }
3820   if (Opts.OpenMPIsDevice && T.isNVPTX()) {
3821     Opts.OpenMPCUDANumSMs =
3822         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_number_of_sm_EQ,
3823                            Opts.OpenMPCUDANumSMs, Diags);
3824     Opts.OpenMPCUDABlocksPerSM =
3825         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_blocks_per_sm_EQ,
3826                            Opts.OpenMPCUDABlocksPerSM, Diags);
3827     Opts.OpenMPCUDAReductionBufNum = getLastArgIntValue(
3828         Args, options::OPT_fopenmp_cuda_teams_reduction_recs_num_EQ,
3829         Opts.OpenMPCUDAReductionBufNum, Diags);
3830   }
3831 
3832   // Get the OpenMP target triples if any.
3833   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
3834     enum ArchPtrSize { Arch16Bit, Arch32Bit, Arch64Bit };
3835     auto getArchPtrSize = [](const llvm::Triple &T) {
3836       if (T.isArch16Bit())
3837         return Arch16Bit;
3838       if (T.isArch32Bit())
3839         return Arch32Bit;
3840       assert(T.isArch64Bit() && "Expected 64-bit architecture");
3841       return Arch64Bit;
3842     };
3843 
3844     for (unsigned i = 0; i < A->getNumValues(); ++i) {
3845       llvm::Triple TT(A->getValue(i));
3846 
3847       if (TT.getArch() == llvm::Triple::UnknownArch ||
3848           !(TT.getArch() == llvm::Triple::aarch64 || TT.isPPC() ||
3849             TT.getArch() == llvm::Triple::nvptx ||
3850             TT.getArch() == llvm::Triple::nvptx64 ||
3851             TT.getArch() == llvm::Triple::amdgcn ||
3852             TT.getArch() == llvm::Triple::x86 ||
3853             TT.getArch() == llvm::Triple::x86_64))
3854         Diags.Report(diag::err_drv_invalid_omp_target) << A->getValue(i);
3855       else if (getArchPtrSize(T) != getArchPtrSize(TT))
3856         Diags.Report(diag::err_drv_incompatible_omp_arch)
3857             << A->getValue(i) << T.str();
3858       else
3859         Opts.OMPTargetTriples.push_back(TT);
3860     }
3861   }
3862 
3863   // Get OpenMP host file path if any and report if a non existent file is
3864   // found
3865   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
3866     Opts.OMPHostIRFile = A->getValue();
3867     if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
3868       Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
3869           << Opts.OMPHostIRFile;
3870   }
3871 
3872   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
3873   Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3874                         Args.hasArg(options::OPT_fopenmp_cuda_mode);
3875 
3876   // Set CUDA support for parallel execution of target regions for OpenMP target
3877   // NVPTX/AMDGCN if specified in options.
3878   Opts.OpenMPCUDATargetParallel =
3879       Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3880       Args.hasArg(options::OPT_fopenmp_cuda_parallel_target_regions);
3881 
3882   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
3883   Opts.OpenMPCUDAForceFullRuntime =
3884       Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3885       Args.hasArg(options::OPT_fopenmp_cuda_force_full_runtime);
3886 
3887   // FIXME: Eliminate this dependency.
3888   unsigned Opt = getOptimizationLevel(Args, IK, Diags),
3889        OptSize = getOptimizationLevelSize(Args);
3890   Opts.Optimize = Opt != 0;
3891   Opts.OptimizeSize = OptSize != 0;
3892 
3893   // This is the __NO_INLINE__ define, which just depends on things like the
3894   // optimization level and -fno-inline, not actually whether the backend has
3895   // inlining enabled.
3896   Opts.NoInlineDefine = !Opts.Optimize;
3897   if (Arg *InlineArg = Args.getLastArg(
3898           options::OPT_finline_functions, options::OPT_finline_hint_functions,
3899           options::OPT_fno_inline_functions, options::OPT_fno_inline))
3900     if (InlineArg->getOption().matches(options::OPT_fno_inline))
3901       Opts.NoInlineDefine = true;
3902 
3903   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
3904     StringRef Val = A->getValue();
3905     if (Val == "fast")
3906       Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3907     else if (Val == "on")
3908       Opts.setDefaultFPContractMode(LangOptions::FPM_On);
3909     else if (Val == "off")
3910       Opts.setDefaultFPContractMode(LangOptions::FPM_Off);
3911     else if (Val == "fast-honor-pragmas")
3912       Opts.setDefaultFPContractMode(LangOptions::FPM_FastHonorPragmas);
3913     else
3914       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
3915   }
3916 
3917   // Parse -fsanitize= arguments.
3918   parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3919                       Diags, Opts.Sanitize);
3920   Opts.NoSanitizeFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
3921   std::vector<std::string> systemBlacklists =
3922       Args.getAllArgValues(OPT_fsanitize_system_blacklist);
3923   Opts.NoSanitizeFiles.insert(Opts.NoSanitizeFiles.end(),
3924                               systemBlacklists.begin(), systemBlacklists.end());
3925 
3926   if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
3927     Opts.setClangABICompat(LangOptions::ClangABI::Latest);
3928 
3929     StringRef Ver = A->getValue();
3930     std::pair<StringRef, StringRef> VerParts = Ver.split('.');
3931     unsigned Major, Minor = 0;
3932 
3933     // Check the version number is valid: either 3.x (0 <= x <= 9) or
3934     // y or y.0 (4 <= y <= current version).
3935     if (!VerParts.first.startswith("0") &&
3936         !VerParts.first.getAsInteger(10, Major) &&
3937         3 <= Major && Major <= CLANG_VERSION_MAJOR &&
3938         (Major == 3 ? VerParts.second.size() == 1 &&
3939                       !VerParts.second.getAsInteger(10, Minor)
3940                     : VerParts.first.size() == Ver.size() ||
3941                       VerParts.second == "0")) {
3942       // Got a valid version number.
3943       if (Major == 3 && Minor <= 8)
3944         Opts.setClangABICompat(LangOptions::ClangABI::Ver3_8);
3945       else if (Major <= 4)
3946         Opts.setClangABICompat(LangOptions::ClangABI::Ver4);
3947       else if (Major <= 6)
3948         Opts.setClangABICompat(LangOptions::ClangABI::Ver6);
3949       else if (Major <= 7)
3950         Opts.setClangABICompat(LangOptions::ClangABI::Ver7);
3951       else if (Major <= 9)
3952         Opts.setClangABICompat(LangOptions::ClangABI::Ver9);
3953       else if (Major <= 11)
3954         Opts.setClangABICompat(LangOptions::ClangABI::Ver11);
3955     } else if (Ver != "latest") {
3956       Diags.Report(diag::err_drv_invalid_value)
3957           << A->getAsString(Args) << A->getValue();
3958     }
3959   }
3960 
3961   if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
3962     StringRef SignScope = A->getValue();
3963 
3964     if (SignScope.equals_lower("none"))
3965       Opts.setSignReturnAddressScope(
3966           LangOptions::SignReturnAddressScopeKind::None);
3967     else if (SignScope.equals_lower("all"))
3968       Opts.setSignReturnAddressScope(
3969           LangOptions::SignReturnAddressScopeKind::All);
3970     else if (SignScope.equals_lower("non-leaf"))
3971       Opts.setSignReturnAddressScope(
3972           LangOptions::SignReturnAddressScopeKind::NonLeaf);
3973     else
3974       Diags.Report(diag::err_drv_invalid_value)
3975           << A->getAsString(Args) << SignScope;
3976 
3977     if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
3978       StringRef SignKey = A->getValue();
3979       if (!SignScope.empty() && !SignKey.empty()) {
3980         if (SignKey.equals_lower("a_key"))
3981           Opts.setSignReturnAddressKey(
3982               LangOptions::SignReturnAddressKeyKind::AKey);
3983         else if (SignKey.equals_lower("b_key"))
3984           Opts.setSignReturnAddressKey(
3985               LangOptions::SignReturnAddressKeyKind::BKey);
3986         else
3987           Diags.Report(diag::err_drv_invalid_value)
3988               << A->getAsString(Args) << SignKey;
3989       }
3990     }
3991   }
3992 
3993   return Diags.getNumErrors() == NumErrorsBefore;
3994 }
3995 
3996 static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
3997   switch (Action) {
3998   case frontend::ASTDeclList:
3999   case frontend::ASTDump:
4000   case frontend::ASTPrint:
4001   case frontend::ASTView:
4002   case frontend::EmitAssembly:
4003   case frontend::EmitBC:
4004   case frontend::EmitHTML:
4005   case frontend::EmitLLVM:
4006   case frontend::EmitLLVMOnly:
4007   case frontend::EmitCodeGenOnly:
4008   case frontend::EmitObj:
4009   case frontend::FixIt:
4010   case frontend::GenerateModule:
4011   case frontend::GenerateModuleInterface:
4012   case frontend::GenerateHeaderModule:
4013   case frontend::GeneratePCH:
4014   case frontend::GenerateInterfaceStubs:
4015   case frontend::ParseSyntaxOnly:
4016   case frontend::ModuleFileInfo:
4017   case frontend::VerifyPCH:
4018   case frontend::PluginAction:
4019   case frontend::RewriteObjC:
4020   case frontend::RewriteTest:
4021   case frontend::RunAnalysis:
4022   case frontend::TemplightDump:
4023   case frontend::MigrateSource:
4024     return false;
4025 
4026   case frontend::DumpCompilerOptions:
4027   case frontend::DumpRawTokens:
4028   case frontend::DumpTokens:
4029   case frontend::InitOnly:
4030   case frontend::PrintPreamble:
4031   case frontend::PrintPreprocessedInput:
4032   case frontend::RewriteMacros:
4033   case frontend::RunPreprocessorOnly:
4034   case frontend::PrintDependencyDirectivesSourceMinimizerOutput:
4035     return true;
4036   }
4037   llvm_unreachable("invalid frontend action");
4038 }
4039 
4040 static void GeneratePreprocessorArgs(PreprocessorOptions &Opts,
4041                                      SmallVectorImpl<const char *> &Args,
4042                                      CompilerInvocation::StringAllocator SA,
4043                                      const LangOptions &LangOpts,
4044                                      const FrontendOptions &FrontendOpts,
4045                                      const CodeGenOptions &CodeGenOpts) {
4046   PreprocessorOptions *PreprocessorOpts = &Opts;
4047 
4048 #define PREPROCESSOR_OPTION_WITH_MARSHALLING(                                  \
4049     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4050     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4051     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4052     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4053   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4054       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4055       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4056 #include "clang/Driver/Options.inc"
4057 #undef PREPROCESSOR_OPTION_WITH_MARSHALLING
4058 
4059   if (Opts.PCHWithHdrStop && !Opts.PCHWithHdrStopCreate)
4060     GenerateArg(Args, OPT_pch_through_hdrstop_use, SA);
4061 
4062   for (const auto &D : Opts.DeserializedPCHDeclsToErrorOn)
4063     GenerateArg(Args, OPT_error_on_deserialized_pch_decl, D, SA);
4064 
4065   for (const auto &MP : Opts.MacroPrefixMap)
4066     GenerateArg(Args, OPT_fmacro_prefix_map_EQ, MP.first + "=" + MP.second, SA);
4067 
4068   if (Opts.PrecompiledPreambleBytes != std::make_pair(0u, false))
4069     GenerateArg(Args, OPT_preamble_bytes_EQ,
4070                 Twine(Opts.PrecompiledPreambleBytes.first) + "," +
4071                     (Opts.PrecompiledPreambleBytes.second ? "1" : "0"),
4072                 SA);
4073 
4074   for (const auto &M : Opts.Macros) {
4075     // Don't generate __CET__ macro definitions. They are implied by the
4076     // -fcf-protection option that is generated elsewhere.
4077     if (M.first == "__CET__=1" && !M.second &&
4078         !CodeGenOpts.CFProtectionReturn && CodeGenOpts.CFProtectionBranch)
4079       continue;
4080     if (M.first == "__CET__=2" && !M.second && CodeGenOpts.CFProtectionReturn &&
4081         !CodeGenOpts.CFProtectionBranch)
4082       continue;
4083     if (M.first == "__CET__=3" && !M.second && CodeGenOpts.CFProtectionReturn &&
4084         CodeGenOpts.CFProtectionBranch)
4085       continue;
4086 
4087     GenerateArg(Args, M.second ? OPT_U : OPT_D, M.first, SA);
4088   }
4089 
4090   for (const auto &I : Opts.Includes) {
4091     // Don't generate OpenCL includes. They are implied by other flags that are
4092     // generated elsewhere.
4093     if (LangOpts.OpenCL && LangOpts.IncludeDefaultHeader &&
4094         ((LangOpts.DeclareOpenCLBuiltins && I == "opencl-c-base.h") ||
4095          I == "opencl-c.h"))
4096       continue;
4097 
4098     GenerateArg(Args, OPT_include, I, SA);
4099   }
4100 
4101   for (const auto &CI : Opts.ChainedIncludes)
4102     GenerateArg(Args, OPT_chain_include, CI, SA);
4103 
4104   for (const auto &RF : Opts.RemappedFiles)
4105     GenerateArg(Args, OPT_remap_file, RF.first + ";" + RF.second, SA);
4106 
4107   // Don't handle LexEditorPlaceholders. It is implied by the action that is
4108   // generated elsewhere.
4109 }
4110 
4111 static bool ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
4112                                   DiagnosticsEngine &Diags,
4113                                   frontend::ActionKind Action,
4114                                   const FrontendOptions &FrontendOpts) {
4115   unsigned NumErrorsBefore = Diags.getNumErrors();
4116 
4117   PreprocessorOptions *PreprocessorOpts = &Opts;
4118 
4119 #define PREPROCESSOR_OPTION_WITH_MARSHALLING(                                  \
4120     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4121     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4122     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4123     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4124   PARSE_OPTION_WITH_MARSHALLING(                                               \
4125       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4126       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4127 #include "clang/Driver/Options.inc"
4128 #undef PREPROCESSOR_OPTION_WITH_MARSHALLING
4129 
4130   Opts.PCHWithHdrStop = Args.hasArg(OPT_pch_through_hdrstop_create) ||
4131                         Args.hasArg(OPT_pch_through_hdrstop_use);
4132 
4133   for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
4134     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
4135 
4136   for (const auto &A : Args.getAllArgValues(OPT_fmacro_prefix_map_EQ)) {
4137     auto Split = StringRef(A).split('=');
4138     Opts.MacroPrefixMap.insert(
4139         {std::string(Split.first), std::string(Split.second)});
4140   }
4141 
4142   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
4143     StringRef Value(A->getValue());
4144     size_t Comma = Value.find(',');
4145     unsigned Bytes = 0;
4146     unsigned EndOfLine = 0;
4147 
4148     if (Comma == StringRef::npos ||
4149         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
4150         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
4151       Diags.Report(diag::err_drv_preamble_format);
4152     else {
4153       Opts.PrecompiledPreambleBytes.first = Bytes;
4154       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
4155     }
4156   }
4157 
4158   // Add the __CET__ macro if a CFProtection option is set.
4159   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
4160     StringRef Name = A->getValue();
4161     if (Name == "branch")
4162       Opts.addMacroDef("__CET__=1");
4163     else if (Name == "return")
4164       Opts.addMacroDef("__CET__=2");
4165     else if (Name == "full")
4166       Opts.addMacroDef("__CET__=3");
4167   }
4168 
4169   // Add macros from the command line.
4170   for (const auto *A : Args.filtered(OPT_D, OPT_U)) {
4171     if (A->getOption().matches(OPT_D))
4172       Opts.addMacroDef(A->getValue());
4173     else
4174       Opts.addMacroUndef(A->getValue());
4175   }
4176 
4177   // Add the ordered list of -includes.
4178   for (const auto *A : Args.filtered(OPT_include))
4179     Opts.Includes.emplace_back(A->getValue());
4180 
4181   for (const auto *A : Args.filtered(OPT_chain_include))
4182     Opts.ChainedIncludes.emplace_back(A->getValue());
4183 
4184   for (const auto *A : Args.filtered(OPT_remap_file)) {
4185     std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
4186 
4187     if (Split.second.empty()) {
4188       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
4189       continue;
4190     }
4191 
4192     Opts.addRemappedFile(Split.first, Split.second);
4193   }
4194 
4195   // Always avoid lexing editor placeholders when we're just running the
4196   // preprocessor as we never want to emit the
4197   // "editor placeholder in source file" error in PP only mode.
4198   if (isStrictlyPreprocessorAction(Action))
4199     Opts.LexEditorPlaceholders = false;
4200 
4201   return Diags.getNumErrors() == NumErrorsBefore;
4202 }
4203 
4204 static void GeneratePreprocessorOutputArgs(
4205     const PreprocessorOutputOptions &Opts, SmallVectorImpl<const char *> &Args,
4206     CompilerInvocation::StringAllocator SA, frontend::ActionKind Action) {
4207   const PreprocessorOutputOptions &PreprocessorOutputOpts = Opts;
4208 
4209 #define PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING(                           \
4210     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4211     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4212     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4213     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4214   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4215       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4216       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4217 #include "clang/Driver/Options.inc"
4218 #undef PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING
4219 
4220   bool Generate_dM = isStrictlyPreprocessorAction(Action) && !Opts.ShowCPP;
4221   if (Generate_dM)
4222     GenerateArg(Args, OPT_dM, SA);
4223   if (!Generate_dM && Opts.ShowMacros)
4224     GenerateArg(Args, OPT_dD, SA);
4225 }
4226 
4227 static bool ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
4228                                         ArgList &Args, DiagnosticsEngine &Diags,
4229                                         frontend::ActionKind Action) {
4230   unsigned NumErrorsBefore = Diags.getNumErrors();
4231 
4232   PreprocessorOutputOptions &PreprocessorOutputOpts = Opts;
4233 
4234 #define PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING(                           \
4235     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4236     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4237     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4238     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4239   PARSE_OPTION_WITH_MARSHALLING(                                               \
4240       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4241       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4242 #include "clang/Driver/Options.inc"
4243 #undef PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING
4244 
4245   Opts.ShowCPP = isStrictlyPreprocessorAction(Action) && !Args.hasArg(OPT_dM);
4246   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
4247 
4248   return Diags.getNumErrors() == NumErrorsBefore;
4249 }
4250 
4251 static void GenerateTargetArgs(const TargetOptions &Opts,
4252                                SmallVectorImpl<const char *> &Args,
4253                                CompilerInvocation::StringAllocator SA) {
4254   const TargetOptions *TargetOpts = &Opts;
4255 #define TARGET_OPTION_WITH_MARSHALLING(                                        \
4256     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4257     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4258     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4259     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4260   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4261       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4262       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4263 #include "clang/Driver/Options.inc"
4264 #undef TARGET_OPTION_WITH_MARSHALLING
4265 
4266   if (!Opts.SDKVersion.empty())
4267     GenerateArg(Args, OPT_target_sdk_version_EQ, Opts.SDKVersion.getAsString(),
4268                 SA);
4269 }
4270 
4271 static bool ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
4272                             DiagnosticsEngine &Diags) {
4273   unsigned NumErrorsBefore = Diags.getNumErrors();
4274 
4275   TargetOptions *TargetOpts = &Opts;
4276 
4277 #define TARGET_OPTION_WITH_MARSHALLING(                                        \
4278     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4279     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4280     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4281     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4282   PARSE_OPTION_WITH_MARSHALLING(                                               \
4283       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4284       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4285 #include "clang/Driver/Options.inc"
4286 #undef TARGET_OPTION_WITH_MARSHALLING
4287 
4288   if (Arg *A = Args.getLastArg(options::OPT_target_sdk_version_EQ)) {
4289     llvm::VersionTuple Version;
4290     if (Version.tryParse(A->getValue()))
4291       Diags.Report(diag::err_drv_invalid_value)
4292           << A->getAsString(Args) << A->getValue();
4293     else
4294       Opts.SDKVersion = Version;
4295   }
4296 
4297   return Diags.getNumErrors() == NumErrorsBefore;
4298 }
4299 
4300 bool CompilerInvocation::CreateFromArgsImpl(
4301     CompilerInvocation &Res, ArrayRef<const char *> CommandLineArgs,
4302     DiagnosticsEngine &Diags, const char *Argv0) {
4303   unsigned NumErrorsBefore = Diags.getNumErrors();
4304 
4305   // Parse the arguments.
4306   const OptTable &Opts = getDriverOptTable();
4307   const unsigned IncludedFlagsBitmask = options::CC1Option;
4308   unsigned MissingArgIndex, MissingArgCount;
4309   InputArgList Args = Opts.ParseArgs(CommandLineArgs, MissingArgIndex,
4310                                      MissingArgCount, IncludedFlagsBitmask);
4311   LangOptions &LangOpts = *Res.getLangOpts();
4312 
4313   // Check for missing argument error.
4314   if (MissingArgCount)
4315     Diags.Report(diag::err_drv_missing_argument)
4316         << Args.getArgString(MissingArgIndex) << MissingArgCount;
4317 
4318   // Issue errors on unknown arguments.
4319   for (const auto *A : Args.filtered(OPT_UNKNOWN)) {
4320     auto ArgString = A->getAsString(Args);
4321     std::string Nearest;
4322     if (Opts.findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
4323       Diags.Report(diag::err_drv_unknown_argument) << ArgString;
4324     else
4325       Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
4326           << ArgString << Nearest;
4327   }
4328 
4329   ParseFileSystemArgs(Res.getFileSystemOpts(), Args, Diags);
4330   ParseMigratorArgs(Res.getMigratorOpts(), Args, Diags);
4331   ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
4332   ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
4333                       /*DefaultDiagColor=*/false);
4334   ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags, LangOpts.IsHeaderFile);
4335   // FIXME: We shouldn't have to pass the DashX option around here
4336   InputKind DashX = Res.getFrontendOpts().DashX;
4337   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
4338   llvm::Triple T(Res.getTargetOpts().Triple);
4339   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args, Diags,
4340                         Res.getFileSystemOpts().WorkingDir);
4341 
4342   ParseLangArgs(LangOpts, Args, DashX, T, Res.getPreprocessorOpts().Includes,
4343                 Diags);
4344   if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
4345     LangOpts.ObjCExceptions = 1;
4346 
4347   if (LangOpts.CUDA) {
4348     // During CUDA device-side compilation, the aux triple is the
4349     // triple used for host compilation.
4350     if (LangOpts.CUDAIsDevice)
4351       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
4352   }
4353 
4354   // Set the triple of the host for OpenMP device compile.
4355   if (LangOpts.OpenMPIsDevice)
4356     Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
4357 
4358   ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags, T,
4359                    Res.getFrontendOpts().OutputFile, LangOpts);
4360 
4361   // FIXME: Override value name discarding when asan or msan is used because the
4362   // backend passes depend on the name of the alloca in order to print out
4363   // names.
4364   Res.getCodeGenOpts().DiscardValueNames &=
4365       !LangOpts.Sanitize.has(SanitizerKind::Address) &&
4366       !LangOpts.Sanitize.has(SanitizerKind::KernelAddress) &&
4367       !LangOpts.Sanitize.has(SanitizerKind::Memory) &&
4368       !LangOpts.Sanitize.has(SanitizerKind::KernelMemory);
4369 
4370   ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, Diags,
4371                         Res.getFrontendOpts().ProgramAction,
4372                         Res.getFrontendOpts());
4373   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args, Diags,
4374                               Res.getFrontendOpts().ProgramAction);
4375 
4376   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args, Diags,
4377                             Res.getFrontendOpts().ProgramAction,
4378                             Res.getPreprocessorOutputOpts().ShowLineMarkers);
4379   if (!Res.getDependencyOutputOpts().OutputFile.empty() &&
4380       Res.getDependencyOutputOpts().Targets.empty())
4381     Diags.Report(diag::err_fe_dependency_file_requires_MT);
4382 
4383   // If sanitizer is enabled, disable OPT_ffine_grained_bitfield_accesses.
4384   if (Res.getCodeGenOpts().FineGrainedBitfieldAccesses &&
4385       !Res.getLangOpts()->Sanitize.empty()) {
4386     Res.getCodeGenOpts().FineGrainedBitfieldAccesses = false;
4387     Diags.Report(diag::warn_drv_fine_grained_bitfield_accesses_ignored);
4388   }
4389 
4390   // Store the command-line for using in the CodeView backend.
4391   Res.getCodeGenOpts().Argv0 = Argv0;
4392   Res.getCodeGenOpts().CommandLineArgs = CommandLineArgs;
4393 
4394   FixupInvocation(Res, Diags, Args, DashX);
4395 
4396   return Diags.getNumErrors() == NumErrorsBefore;
4397 }
4398 
4399 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Invocation,
4400                                         ArrayRef<const char *> CommandLineArgs,
4401                                         DiagnosticsEngine &Diags,
4402                                         const char *Argv0) {
4403   CompilerInvocation DummyInvocation;
4404 
4405   return RoundTrip(
4406       [](CompilerInvocation &Invocation, ArrayRef<const char *> CommandLineArgs,
4407          DiagnosticsEngine &Diags, const char *Argv0) {
4408         return CreateFromArgsImpl(Invocation, CommandLineArgs, Diags, Argv0);
4409       },
4410       [](CompilerInvocation &Invocation, SmallVectorImpl<const char *> &Args,
4411          StringAllocator SA) { Invocation.generateCC1CommandLine(Args, SA); },
4412       Invocation, DummyInvocation, CommandLineArgs, Diags, Argv0);
4413 }
4414 
4415 std::string CompilerInvocation::getModuleHash() const {
4416   // Note: For QoI reasons, the things we use as a hash here should all be
4417   // dumped via the -module-info flag.
4418   using llvm::hash_code;
4419   using llvm::hash_value;
4420   using llvm::hash_combine;
4421   using llvm::hash_combine_range;
4422 
4423   // Start the signature with the compiler version.
4424   // FIXME: We'd rather use something more cryptographically sound than
4425   // CityHash, but this will do for now.
4426   hash_code code = hash_value(getClangFullRepositoryVersion());
4427 
4428   // Also include the serialization version, in case LLVM_APPEND_VC_REV is off
4429   // and getClangFullRepositoryVersion() doesn't include git revision.
4430   code = hash_combine(code, serialization::VERSION_MAJOR,
4431                       serialization::VERSION_MINOR);
4432 
4433   // Extend the signature with the language options
4434 #define LANGOPT(Name, Bits, Default, Description) \
4435    code = hash_combine(code, LangOpts->Name);
4436 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
4437   code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
4438 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
4439 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
4440 #include "clang/Basic/LangOptions.def"
4441 
4442   for (StringRef Feature : LangOpts->ModuleFeatures)
4443     code = hash_combine(code, Feature);
4444 
4445   code = hash_combine(code, LangOpts->ObjCRuntime);
4446   const auto &BCN = LangOpts->CommentOpts.BlockCommandNames;
4447   code = hash_combine(code, hash_combine_range(BCN.begin(), BCN.end()));
4448 
4449   // Extend the signature with the target options.
4450   code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
4451                       TargetOpts->TuneCPU, TargetOpts->ABI);
4452   for (const auto &FeatureAsWritten : TargetOpts->FeaturesAsWritten)
4453     code = hash_combine(code, FeatureAsWritten);
4454 
4455   // Extend the signature with preprocessor options.
4456   const PreprocessorOptions &ppOpts = getPreprocessorOpts();
4457   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
4458   code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
4459 
4460   for (const auto &I : getPreprocessorOpts().Macros) {
4461     // If we're supposed to ignore this macro for the purposes of modules,
4462     // don't put it into the hash.
4463     if (!hsOpts.ModulesIgnoreMacros.empty()) {
4464       // Check whether we're ignoring this macro.
4465       StringRef MacroDef = I.first;
4466       if (hsOpts.ModulesIgnoreMacros.count(
4467               llvm::CachedHashString(MacroDef.split('=').first)))
4468         continue;
4469     }
4470 
4471     code = hash_combine(code, I.first, I.second);
4472   }
4473 
4474   // Extend the signature with the sysroot and other header search options.
4475   code = hash_combine(code, hsOpts.Sysroot,
4476                       hsOpts.ModuleFormat,
4477                       hsOpts.UseDebugInfo,
4478                       hsOpts.UseBuiltinIncludes,
4479                       hsOpts.UseStandardSystemIncludes,
4480                       hsOpts.UseStandardCXXIncludes,
4481                       hsOpts.UseLibcxx,
4482                       hsOpts.ModulesValidateDiagnosticOptions);
4483   code = hash_combine(code, hsOpts.ResourceDir);
4484 
4485   if (hsOpts.ModulesStrictContextHash) {
4486     hash_code SHPC = hash_combine_range(hsOpts.SystemHeaderPrefixes.begin(),
4487                                         hsOpts.SystemHeaderPrefixes.end());
4488     hash_code UEC = hash_combine_range(hsOpts.UserEntries.begin(),
4489                                        hsOpts.UserEntries.end());
4490     code = hash_combine(code, hsOpts.SystemHeaderPrefixes.size(), SHPC,
4491                         hsOpts.UserEntries.size(), UEC);
4492 
4493     const DiagnosticOptions &diagOpts = getDiagnosticOpts();
4494     #define DIAGOPT(Name, Bits, Default) \
4495       code = hash_combine(code, diagOpts.Name);
4496     #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
4497       code = hash_combine(code, diagOpts.get##Name());
4498     #include "clang/Basic/DiagnosticOptions.def"
4499     #undef DIAGOPT
4500     #undef ENUM_DIAGOPT
4501   }
4502 
4503   // Extend the signature with the user build path.
4504   code = hash_combine(code, hsOpts.ModuleUserBuildPath);
4505 
4506   // Extend the signature with the module file extensions.
4507   const FrontendOptions &frontendOpts = getFrontendOpts();
4508   for (const auto &ext : frontendOpts.ModuleFileExtensions) {
4509     code = ext->hashExtension(code);
4510   }
4511 
4512   // When compiling with -gmodules, also hash -fdebug-prefix-map as it
4513   // affects the debug info in the PCM.
4514   if (getCodeGenOpts().DebugTypeExtRefs)
4515     for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
4516       code = hash_combine(code, KeyValue.first, KeyValue.second);
4517 
4518   // Extend the signature with the enabled sanitizers, if at least one is
4519   // enabled. Sanitizers which cannot affect AST generation aren't hashed.
4520   SanitizerSet SanHash = LangOpts->Sanitize;
4521   SanHash.clear(getPPTransparentSanitizers());
4522   if (!SanHash.empty())
4523     code = hash_combine(code, SanHash.Mask);
4524 
4525   return llvm::APInt(64, code).toString(36, /*Signed=*/false);
4526 }
4527 
4528 void CompilerInvocation::generateCC1CommandLine(
4529     SmallVectorImpl<const char *> &Args, StringAllocator SA) const {
4530   llvm::Triple T(TargetOpts->Triple);
4531 
4532   GenerateFileSystemArgs(FileSystemOpts, Args, SA);
4533   GenerateMigratorArgs(MigratorOpts, Args, SA);
4534   GenerateAnalyzerArgs(*AnalyzerOpts, Args, SA);
4535   GenerateDiagnosticArgs(*DiagnosticOpts, Args, SA, false);
4536   GenerateFrontendArgs(FrontendOpts, Args, SA, LangOpts->IsHeaderFile);
4537   GenerateTargetArgs(*TargetOpts, Args, SA);
4538   GenerateHeaderSearchArgs(*HeaderSearchOpts, Args, SA);
4539   GenerateLangArgs(*LangOpts, Args, SA, T, FrontendOpts.DashX);
4540   GenerateCodeGenArgs(CodeGenOpts, Args, SA, T, FrontendOpts.OutputFile,
4541                       &*LangOpts);
4542   GeneratePreprocessorArgs(*PreprocessorOpts, Args, SA, *LangOpts, FrontendOpts,
4543                            CodeGenOpts);
4544   GeneratePreprocessorOutputArgs(PreprocessorOutputOpts, Args, SA,
4545                                  FrontendOpts.ProgramAction);
4546   GenerateDependencyOutputArgs(DependencyOutputOpts, Args, SA);
4547 }
4548 
4549 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
4550 clang::createVFSFromCompilerInvocation(const CompilerInvocation &CI,
4551                                        DiagnosticsEngine &Diags) {
4552   return createVFSFromCompilerInvocation(CI, Diags,
4553                                          llvm::vfs::getRealFileSystem());
4554 }
4555 
4556 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
4557 clang::createVFSFromCompilerInvocation(
4558     const CompilerInvocation &CI, DiagnosticsEngine &Diags,
4559     IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
4560   if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
4561     return BaseFS;
4562 
4563   IntrusiveRefCntPtr<llvm::vfs::FileSystem> Result = BaseFS;
4564   // earlier vfs files are on the bottom
4565   for (const auto &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
4566     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
4567         Result->getBufferForFile(File);
4568     if (!Buffer) {
4569       Diags.Report(diag::err_missing_vfs_overlay_file) << File;
4570       continue;
4571     }
4572 
4573     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getVFSFromYAML(
4574         std::move(Buffer.get()), /*DiagHandler*/ nullptr, File,
4575         /*DiagContext*/ nullptr, Result);
4576     if (!FS) {
4577       Diags.Report(diag::err_invalid_vfs_overlay) << File;
4578       continue;
4579     }
4580 
4581     Result = FS;
4582   }
4583   return Result;
4584 }
4585