xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 517bbc64dbe493644eff8d55fd9566435e930520)
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/HashBuilder.h"
82 #include "llvm/Support/Host.h"
83 #include "llvm/Support/MathExtras.h"
84 #include "llvm/Support/MemoryBuffer.h"
85 #include "llvm/Support/Path.h"
86 #include "llvm/Support/Process.h"
87 #include "llvm/Support/Regex.h"
88 #include "llvm/Support/VersionTuple.h"
89 #include "llvm/Support/VirtualFileSystem.h"
90 #include "llvm/Support/raw_ostream.h"
91 #include "llvm/Target/TargetOptions.h"
92 #include <algorithm>
93 #include <atomic>
94 #include <cassert>
95 #include <cstddef>
96 #include <cstring>
97 #include <fstream>
98 #include <memory>
99 #include <string>
100 #include <tuple>
101 #include <type_traits>
102 #include <utility>
103 #include <vector>
104 
105 using namespace clang;
106 using namespace driver;
107 using namespace options;
108 using namespace llvm::opt;
109 
110 //===----------------------------------------------------------------------===//
111 // Helpers.
112 //===----------------------------------------------------------------------===//
113 
114 // Parse misexpect tolerance argument value.
115 // Valid option values are integers in the range [0, 100)
116 inline Expected<Optional<uint64_t>> parseToleranceOption(StringRef Arg) {
117   int64_t Val;
118   if (Arg.getAsInteger(10, Val))
119     return llvm::createStringError(llvm::inconvertibleErrorCode(),
120                                    "Not an integer: %s", Arg.data());
121   return Val;
122 }
123 
124 //===----------------------------------------------------------------------===//
125 // Initialization.
126 //===----------------------------------------------------------------------===//
127 
128 CompilerInvocationRefBase::CompilerInvocationRefBase()
129     : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
130       DiagnosticOpts(new DiagnosticOptions()),
131       HeaderSearchOpts(new HeaderSearchOptions()),
132       PreprocessorOpts(new PreprocessorOptions()),
133       AnalyzerOpts(new AnalyzerOptions()) {}
134 
135 CompilerInvocationRefBase::CompilerInvocationRefBase(
136     const CompilerInvocationRefBase &X)
137     : LangOpts(new LangOptions(*X.getLangOpts())),
138       TargetOpts(new TargetOptions(X.getTargetOpts())),
139       DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
140       HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
141       PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())),
142       AnalyzerOpts(new AnalyzerOptions(*X.getAnalyzerOpts())) {}
143 
144 CompilerInvocationRefBase::CompilerInvocationRefBase(
145     CompilerInvocationRefBase &&X) = default;
146 
147 CompilerInvocationRefBase &
148 CompilerInvocationRefBase::operator=(CompilerInvocationRefBase X) {
149   LangOpts.swap(X.LangOpts);
150   TargetOpts.swap(X.TargetOpts);
151   DiagnosticOpts.swap(X.DiagnosticOpts);
152   HeaderSearchOpts.swap(X.HeaderSearchOpts);
153   PreprocessorOpts.swap(X.PreprocessorOpts);
154   AnalyzerOpts.swap(X.AnalyzerOpts);
155   return *this;
156 }
157 
158 CompilerInvocationRefBase &
159 CompilerInvocationRefBase::operator=(CompilerInvocationRefBase &&X) = default;
160 
161 CompilerInvocationRefBase::~CompilerInvocationRefBase() = default;
162 
163 //===----------------------------------------------------------------------===//
164 // Normalizers
165 //===----------------------------------------------------------------------===//
166 
167 #define SIMPLE_ENUM_VALUE_TABLE
168 #include "clang/Driver/Options.inc"
169 #undef SIMPLE_ENUM_VALUE_TABLE
170 
171 static llvm::Optional<bool> normalizeSimpleFlag(OptSpecifier Opt,
172                                                 unsigned TableIndex,
173                                                 const ArgList &Args,
174                                                 DiagnosticsEngine &Diags) {
175   if (Args.hasArg(Opt))
176     return true;
177   return None;
178 }
179 
180 static Optional<bool> normalizeSimpleNegativeFlag(OptSpecifier Opt, unsigned,
181                                                   const ArgList &Args,
182                                                   DiagnosticsEngine &) {
183   if (Args.hasArg(Opt))
184     return false;
185   return None;
186 }
187 
188 /// The tblgen-erated code passes in a fifth parameter of an arbitrary type, but
189 /// denormalizeSimpleFlags never looks at it. Avoid bloating compile-time with
190 /// unnecessary template instantiations and just ignore it with a variadic
191 /// argument.
192 static void denormalizeSimpleFlag(SmallVectorImpl<const char *> &Args,
193                                   const char *Spelling,
194                                   CompilerInvocation::StringAllocator,
195                                   Option::OptionClass, unsigned, /*T*/...) {
196   Args.push_back(Spelling);
197 }
198 
199 template <typename T> static constexpr bool is_uint64_t_convertible() {
200   return !std::is_same<T, uint64_t>::value &&
201          llvm::is_integral_or_enum<T>::value;
202 }
203 
204 template <typename T,
205           std::enable_if_t<!is_uint64_t_convertible<T>(), bool> = false>
206 static auto makeFlagToValueNormalizer(T Value) {
207   return [Value](OptSpecifier Opt, unsigned, const ArgList &Args,
208                  DiagnosticsEngine &) -> Optional<T> {
209     if (Args.hasArg(Opt))
210       return Value;
211     return None;
212   };
213 }
214 
215 template <typename T,
216           std::enable_if_t<is_uint64_t_convertible<T>(), bool> = false>
217 static auto makeFlagToValueNormalizer(T Value) {
218   return makeFlagToValueNormalizer(uint64_t(Value));
219 }
220 
221 static auto makeBooleanOptionNormalizer(bool Value, bool OtherValue,
222                                         OptSpecifier OtherOpt) {
223   return [Value, OtherValue, OtherOpt](OptSpecifier Opt, unsigned,
224                                        const ArgList &Args,
225                                        DiagnosticsEngine &) -> Optional<bool> {
226     if (const Arg *A = Args.getLastArg(Opt, OtherOpt)) {
227       return A->getOption().matches(Opt) ? Value : OtherValue;
228     }
229     return None;
230   };
231 }
232 
233 static auto makeBooleanOptionDenormalizer(bool Value) {
234   return [Value](SmallVectorImpl<const char *> &Args, const char *Spelling,
235                  CompilerInvocation::StringAllocator, Option::OptionClass,
236                  unsigned, bool KeyPath) {
237     if (KeyPath == Value)
238       Args.push_back(Spelling);
239   };
240 }
241 
242 static void denormalizeStringImpl(SmallVectorImpl<const char *> &Args,
243                                   const char *Spelling,
244                                   CompilerInvocation::StringAllocator SA,
245                                   Option::OptionClass OptClass, unsigned,
246                                   const Twine &Value) {
247   switch (OptClass) {
248   case Option::SeparateClass:
249   case Option::JoinedOrSeparateClass:
250   case Option::JoinedAndSeparateClass:
251     Args.push_back(Spelling);
252     Args.push_back(SA(Value));
253     break;
254   case Option::JoinedClass:
255   case Option::CommaJoinedClass:
256     Args.push_back(SA(Twine(Spelling) + Value));
257     break;
258   default:
259     llvm_unreachable("Cannot denormalize an option with option class "
260                      "incompatible with string denormalization.");
261   }
262 }
263 
264 template <typename T>
265 static void
266 denormalizeString(SmallVectorImpl<const char *> &Args, const char *Spelling,
267                   CompilerInvocation::StringAllocator SA,
268                   Option::OptionClass OptClass, unsigned TableIndex, T Value) {
269   denormalizeStringImpl(Args, Spelling, SA, OptClass, TableIndex, Twine(Value));
270 }
271 
272 static Optional<SimpleEnumValue>
273 findValueTableByName(const SimpleEnumValueTable &Table, StringRef Name) {
274   for (int I = 0, E = Table.Size; I != E; ++I)
275     if (Name == Table.Table[I].Name)
276       return Table.Table[I];
277 
278   return None;
279 }
280 
281 static Optional<SimpleEnumValue>
282 findValueTableByValue(const SimpleEnumValueTable &Table, unsigned Value) {
283   for (int I = 0, E = Table.Size; I != E; ++I)
284     if (Value == Table.Table[I].Value)
285       return Table.Table[I];
286 
287   return None;
288 }
289 
290 static llvm::Optional<unsigned> normalizeSimpleEnum(OptSpecifier Opt,
291                                                     unsigned TableIndex,
292                                                     const ArgList &Args,
293                                                     DiagnosticsEngine &Diags) {
294   assert(TableIndex < SimpleEnumValueTablesSize);
295   const SimpleEnumValueTable &Table = SimpleEnumValueTables[TableIndex];
296 
297   auto *Arg = Args.getLastArg(Opt);
298   if (!Arg)
299     return None;
300 
301   StringRef ArgValue = Arg->getValue();
302   if (auto MaybeEnumVal = findValueTableByName(Table, ArgValue))
303     return MaybeEnumVal->Value;
304 
305   Diags.Report(diag::err_drv_invalid_value)
306       << Arg->getAsString(Args) << ArgValue;
307   return None;
308 }
309 
310 static void denormalizeSimpleEnumImpl(SmallVectorImpl<const char *> &Args,
311                                       const char *Spelling,
312                                       CompilerInvocation::StringAllocator SA,
313                                       Option::OptionClass OptClass,
314                                       unsigned TableIndex, unsigned Value) {
315   assert(TableIndex < SimpleEnumValueTablesSize);
316   const SimpleEnumValueTable &Table = SimpleEnumValueTables[TableIndex];
317   if (auto MaybeEnumVal = findValueTableByValue(Table, Value)) {
318     denormalizeString(Args, Spelling, SA, OptClass, TableIndex,
319                       MaybeEnumVal->Name);
320   } else {
321     llvm_unreachable("The simple enum value was not correctly defined in "
322                      "the tablegen option description");
323   }
324 }
325 
326 template <typename T>
327 static void denormalizeSimpleEnum(SmallVectorImpl<const char *> &Args,
328                                   const char *Spelling,
329                                   CompilerInvocation::StringAllocator SA,
330                                   Option::OptionClass OptClass,
331                                   unsigned TableIndex, T Value) {
332   return denormalizeSimpleEnumImpl(Args, Spelling, SA, OptClass, TableIndex,
333                                    static_cast<unsigned>(Value));
334 }
335 
336 static Optional<std::string> normalizeString(OptSpecifier Opt, int TableIndex,
337                                              const ArgList &Args,
338                                              DiagnosticsEngine &Diags) {
339   auto *Arg = Args.getLastArg(Opt);
340   if (!Arg)
341     return None;
342   return std::string(Arg->getValue());
343 }
344 
345 template <typename IntTy>
346 static Optional<IntTy> normalizeStringIntegral(OptSpecifier Opt, int,
347                                                const ArgList &Args,
348                                                DiagnosticsEngine &Diags) {
349   auto *Arg = Args.getLastArg(Opt);
350   if (!Arg)
351     return None;
352   IntTy Res;
353   if (StringRef(Arg->getValue()).getAsInteger(0, Res)) {
354     Diags.Report(diag::err_drv_invalid_int_value)
355         << Arg->getAsString(Args) << Arg->getValue();
356     return None;
357   }
358   return Res;
359 }
360 
361 static Optional<std::vector<std::string>>
362 normalizeStringVector(OptSpecifier Opt, int, const ArgList &Args,
363                       DiagnosticsEngine &) {
364   return Args.getAllArgValues(Opt);
365 }
366 
367 static void denormalizeStringVector(SmallVectorImpl<const char *> &Args,
368                                     const char *Spelling,
369                                     CompilerInvocation::StringAllocator SA,
370                                     Option::OptionClass OptClass,
371                                     unsigned TableIndex,
372                                     const std::vector<std::string> &Values) {
373   switch (OptClass) {
374   case Option::CommaJoinedClass: {
375     std::string CommaJoinedValue;
376     if (!Values.empty()) {
377       CommaJoinedValue.append(Values.front());
378       for (const std::string &Value : llvm::drop_begin(Values, 1)) {
379         CommaJoinedValue.append(",");
380         CommaJoinedValue.append(Value);
381       }
382     }
383     denormalizeString(Args, Spelling, SA, Option::OptionClass::JoinedClass,
384                       TableIndex, CommaJoinedValue);
385     break;
386   }
387   case Option::JoinedClass:
388   case Option::SeparateClass:
389   case Option::JoinedOrSeparateClass:
390     for (const std::string &Value : Values)
391       denormalizeString(Args, Spelling, SA, OptClass, TableIndex, Value);
392     break;
393   default:
394     llvm_unreachable("Cannot denormalize an option with option class "
395                      "incompatible with string vector denormalization.");
396   }
397 }
398 
399 static Optional<std::string> normalizeTriple(OptSpecifier Opt, int TableIndex,
400                                              const ArgList &Args,
401                                              DiagnosticsEngine &Diags) {
402   auto *Arg = Args.getLastArg(Opt);
403   if (!Arg)
404     return None;
405   return llvm::Triple::normalize(Arg->getValue());
406 }
407 
408 template <typename T, typename U>
409 static T mergeForwardValue(T KeyPath, U Value) {
410   return static_cast<T>(Value);
411 }
412 
413 template <typename T, typename U> static T mergeMaskValue(T KeyPath, U Value) {
414   return KeyPath | Value;
415 }
416 
417 template <typename T> static T extractForwardValue(T KeyPath) {
418   return KeyPath;
419 }
420 
421 template <typename T, typename U, U Value>
422 static T extractMaskValue(T KeyPath) {
423   return ((KeyPath & Value) == Value) ? static_cast<T>(Value) : T();
424 }
425 
426 #define PARSE_OPTION_WITH_MARSHALLING(                                         \
427     ARGS, DIAGS, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,       \
428     IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)             \
429   if ((FLAGS)&options::CC1Option) {                                            \
430     KEYPATH = MERGER(KEYPATH, DEFAULT_VALUE);                                  \
431     if (IMPLIED_CHECK)                                                         \
432       KEYPATH = MERGER(KEYPATH, IMPLIED_VALUE);                                \
433     if (SHOULD_PARSE)                                                          \
434       if (auto MaybeValue = NORMALIZER(OPT_##ID, TABLE_INDEX, ARGS, DIAGS))    \
435         KEYPATH =                                                              \
436             MERGER(KEYPATH, static_cast<decltype(KEYPATH)>(*MaybeValue));      \
437   }
438 
439 // Capture the extracted value as a lambda argument to avoid potential issues
440 // with lifetime extension of the reference.
441 #define GENERATE_OPTION_WITH_MARSHALLING(                                      \
442     ARGS, STRING_ALLOCATOR, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH,       \
443     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR,      \
444     TABLE_INDEX)                                                               \
445   if ((FLAGS)&options::CC1Option) {                                            \
446     [&](const auto &Extracted) {                                               \
447       if (ALWAYS_EMIT ||                                                       \
448           (Extracted !=                                                        \
449            static_cast<decltype(KEYPATH)>((IMPLIED_CHECK) ? (IMPLIED_VALUE)    \
450                                                           : (DEFAULT_VALUE)))) \
451         DENORMALIZER(ARGS, SPELLING, STRING_ALLOCATOR, Option::KIND##Class,    \
452                      TABLE_INDEX, Extracted);                                  \
453     }(EXTRACTOR(KEYPATH));                                                     \
454   }
455 
456 static StringRef GetInputKindName(InputKind IK);
457 
458 static bool FixupInvocation(CompilerInvocation &Invocation,
459                             DiagnosticsEngine &Diags, const ArgList &Args,
460                             InputKind IK) {
461   unsigned NumErrorsBefore = Diags.getNumErrors();
462 
463   LangOptions &LangOpts = *Invocation.getLangOpts();
464   CodeGenOptions &CodeGenOpts = Invocation.getCodeGenOpts();
465   TargetOptions &TargetOpts = Invocation.getTargetOpts();
466   FrontendOptions &FrontendOpts = Invocation.getFrontendOpts();
467   CodeGenOpts.XRayInstrumentFunctions = LangOpts.XRayInstrument;
468   CodeGenOpts.XRayAlwaysEmitCustomEvents = LangOpts.XRayAlwaysEmitCustomEvents;
469   CodeGenOpts.XRayAlwaysEmitTypedEvents = LangOpts.XRayAlwaysEmitTypedEvents;
470   CodeGenOpts.DisableFree = FrontendOpts.DisableFree;
471   FrontendOpts.GenerateGlobalModuleIndex = FrontendOpts.UseGlobalModuleIndex;
472   if (FrontendOpts.ShowStats)
473     CodeGenOpts.ClearASTBeforeBackend = false;
474   LangOpts.SanitizeCoverage = CodeGenOpts.hasSanitizeCoverage();
475   LangOpts.ForceEmitVTables = CodeGenOpts.ForceEmitVTables;
476   LangOpts.SpeculativeLoadHardening = CodeGenOpts.SpeculativeLoadHardening;
477   LangOpts.CurrentModule = LangOpts.ModuleName;
478 
479   llvm::Triple T(TargetOpts.Triple);
480   llvm::Triple::ArchType Arch = T.getArch();
481 
482   CodeGenOpts.CodeModel = TargetOpts.CodeModel;
483 
484   if (LangOpts.getExceptionHandling() !=
485           LangOptions::ExceptionHandlingKind::None &&
486       T.isWindowsMSVCEnvironment())
487     Diags.Report(diag::err_fe_invalid_exception_model)
488         << static_cast<unsigned>(LangOpts.getExceptionHandling()) << T.str();
489 
490   if (LangOpts.AppleKext && !LangOpts.CPlusPlus)
491     Diags.Report(diag::warn_c_kext);
492 
493   if (Args.hasArg(OPT_fconcepts_ts))
494     Diags.Report(diag::warn_fe_concepts_ts_flag);
495 
496   if (LangOpts.NewAlignOverride &&
497       !llvm::isPowerOf2_32(LangOpts.NewAlignOverride)) {
498     Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
499     Diags.Report(diag::err_fe_invalid_alignment)
500         << A->getAsString(Args) << A->getValue();
501     LangOpts.NewAlignOverride = 0;
502   }
503 
504   // Prevent the user from specifying both -fsycl-is-device and -fsycl-is-host.
505   if (LangOpts.SYCLIsDevice && LangOpts.SYCLIsHost)
506     Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fsycl-is-device"
507                                                           << "-fsycl-is-host";
508 
509   if (Args.hasArg(OPT_fgnu89_inline) && LangOpts.CPlusPlus)
510     Diags.Report(diag::err_drv_argument_not_allowed_with)
511         << "-fgnu89-inline" << GetInputKindName(IK);
512 
513   if (Args.hasArg(OPT_fgpu_allow_device_init) && !LangOpts.HIP)
514     Diags.Report(diag::warn_ignored_hip_only_option)
515         << Args.getLastArg(OPT_fgpu_allow_device_init)->getAsString(Args);
516 
517   if (Args.hasArg(OPT_gpu_max_threads_per_block_EQ) && !LangOpts.HIP)
518     Diags.Report(diag::warn_ignored_hip_only_option)
519         << Args.getLastArg(OPT_gpu_max_threads_per_block_EQ)->getAsString(Args);
520 
521   // When these options are used, the compiler is allowed to apply
522   // optimizations that may affect the final result. For example
523   // (x+y)+z is transformed to x+(y+z) but may not give the same
524   // final result; it's not value safe.
525   // Another example can be to simplify x/x to 1.0 but x could be 0.0, INF
526   // or NaN. Final result may then differ. An error is issued when the eval
527   // method is set with one of these options.
528   if (Args.hasArg(OPT_ffp_eval_method_EQ)) {
529     if (LangOpts.ApproxFunc)
530       Diags.Report(diag::err_incompatible_fp_eval_method_options) << 0;
531     if (LangOpts.AllowFPReassoc)
532       Diags.Report(diag::err_incompatible_fp_eval_method_options) << 1;
533     if (LangOpts.AllowRecip)
534       Diags.Report(diag::err_incompatible_fp_eval_method_options) << 2;
535   }
536 
537   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
538   // This option should be deprecated for CL > 1.0 because
539   // this option was added for compatibility with OpenCL 1.0.
540   if (Args.getLastArg(OPT_cl_strict_aliasing) &&
541       (LangOpts.getOpenCLCompatibleVersion() > 100))
542     Diags.Report(diag::warn_option_invalid_ocl_version)
543         << LangOpts.getOpenCLVersionString()
544         << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
545 
546   if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
547     auto DefaultCC = LangOpts.getDefaultCallingConv();
548 
549     bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
550                       DefaultCC == LangOptions::DCC_StdCall) &&
551                      Arch != llvm::Triple::x86;
552     emitError |= (DefaultCC == LangOptions::DCC_VectorCall ||
553                   DefaultCC == LangOptions::DCC_RegCall) &&
554                  !T.isX86();
555     if (emitError)
556       Diags.Report(diag::err_drv_argument_not_allowed_with)
557           << A->getSpelling() << T.getTriple();
558   }
559 
560   return Diags.getNumErrors() == NumErrorsBefore;
561 }
562 
563 //===----------------------------------------------------------------------===//
564 // Deserialization (from args)
565 //===----------------------------------------------------------------------===//
566 
567 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
568                                      DiagnosticsEngine &Diags) {
569   unsigned DefaultOpt = llvm::CodeGenOpt::None;
570   if ((IK.getLanguage() == Language::OpenCL ||
571        IK.getLanguage() == Language::OpenCLCXX) &&
572       !Args.hasArg(OPT_cl_opt_disable))
573     DefaultOpt = llvm::CodeGenOpt::Default;
574 
575   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
576     if (A->getOption().matches(options::OPT_O0))
577       return llvm::CodeGenOpt::None;
578 
579     if (A->getOption().matches(options::OPT_Ofast))
580       return llvm::CodeGenOpt::Aggressive;
581 
582     assert(A->getOption().matches(options::OPT_O));
583 
584     StringRef S(A->getValue());
585     if (S == "s" || S == "z")
586       return llvm::CodeGenOpt::Default;
587 
588     if (S == "g")
589       return llvm::CodeGenOpt::Less;
590 
591     return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
592   }
593 
594   return DefaultOpt;
595 }
596 
597 static unsigned getOptimizationLevelSize(ArgList &Args) {
598   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
599     if (A->getOption().matches(options::OPT_O)) {
600       switch (A->getValue()[0]) {
601       default:
602         return 0;
603       case 's':
604         return 1;
605       case 'z':
606         return 2;
607       }
608     }
609   }
610   return 0;
611 }
612 
613 static void GenerateArg(SmallVectorImpl<const char *> &Args,
614                         llvm::opt::OptSpecifier OptSpecifier,
615                         CompilerInvocation::StringAllocator SA) {
616   Option Opt = getDriverOptTable().getOption(OptSpecifier);
617   denormalizeSimpleFlag(Args, SA(Opt.getPrefix() + Opt.getName()), SA,
618                         Option::OptionClass::FlagClass, 0);
619 }
620 
621 static void GenerateArg(SmallVectorImpl<const char *> &Args,
622                         llvm::opt::OptSpecifier OptSpecifier,
623                         const Twine &Value,
624                         CompilerInvocation::StringAllocator SA) {
625   Option Opt = getDriverOptTable().getOption(OptSpecifier);
626   denormalizeString(Args, SA(Opt.getPrefix() + Opt.getName()), SA,
627                     Opt.getKind(), 0, Value);
628 }
629 
630 // Parse command line arguments into CompilerInvocation.
631 using ParseFn =
632     llvm::function_ref<bool(CompilerInvocation &, ArrayRef<const char *>,
633                             DiagnosticsEngine &, const char *)>;
634 
635 // Generate command line arguments from CompilerInvocation.
636 using GenerateFn = llvm::function_ref<void(
637     CompilerInvocation &, SmallVectorImpl<const char *> &,
638     CompilerInvocation::StringAllocator)>;
639 
640 // May perform round-trip of command line arguments. By default, the round-trip
641 // is enabled in assert builds. This can be overwritten at run-time via the
642 // "-round-trip-args" and "-no-round-trip-args" command line flags.
643 // During round-trip, the command line arguments are parsed into a dummy
644 // instance of CompilerInvocation which is used to generate the command line
645 // arguments again. The real CompilerInvocation instance is then created by
646 // parsing the generated arguments, not the original ones.
647 static bool RoundTrip(ParseFn Parse, GenerateFn Generate,
648                       CompilerInvocation &RealInvocation,
649                       CompilerInvocation &DummyInvocation,
650                       ArrayRef<const char *> CommandLineArgs,
651                       DiagnosticsEngine &Diags, const char *Argv0) {
652 #ifndef NDEBUG
653   bool DoRoundTripDefault = true;
654 #else
655   bool DoRoundTripDefault = false;
656 #endif
657 
658   bool DoRoundTrip = DoRoundTripDefault;
659   for (const auto *Arg : CommandLineArgs) {
660     if (Arg == StringRef("-round-trip-args"))
661       DoRoundTrip = true;
662     if (Arg == StringRef("-no-round-trip-args"))
663       DoRoundTrip = false;
664   }
665 
666   // If round-trip was not requested, simply run the parser with the real
667   // invocation diagnostics.
668   if (!DoRoundTrip)
669     return Parse(RealInvocation, CommandLineArgs, Diags, Argv0);
670 
671   // Serializes quoted (and potentially escaped) arguments.
672   auto SerializeArgs = [](ArrayRef<const char *> Args) {
673     std::string Buffer;
674     llvm::raw_string_ostream OS(Buffer);
675     for (const char *Arg : Args) {
676       llvm::sys::printArg(OS, Arg, /*Quote=*/true);
677       OS << ' ';
678     }
679     OS.flush();
680     return Buffer;
681   };
682 
683   // Setup a dummy DiagnosticsEngine.
684   DiagnosticsEngine DummyDiags(new DiagnosticIDs(), new DiagnosticOptions());
685   DummyDiags.setClient(new TextDiagnosticBuffer());
686 
687   // Run the first parse on the original arguments with the dummy invocation and
688   // diagnostics.
689   if (!Parse(DummyInvocation, CommandLineArgs, DummyDiags, Argv0) ||
690       DummyDiags.getNumWarnings() != 0) {
691     // If the first parse did not succeed, it must be user mistake (invalid
692     // command line arguments). We won't be able to generate arguments that
693     // would reproduce the same result. Let's fail again with the real
694     // invocation and diagnostics, so all side-effects of parsing are visible.
695     unsigned NumWarningsBefore = Diags.getNumWarnings();
696     auto Success = Parse(RealInvocation, CommandLineArgs, Diags, Argv0);
697     if (!Success || Diags.getNumWarnings() != NumWarningsBefore)
698       return Success;
699 
700     // Parse with original options and diagnostics succeeded even though it
701     // shouldn't have. Something is off.
702     Diags.Report(diag::err_cc1_round_trip_fail_then_ok);
703     Diags.Report(diag::note_cc1_round_trip_original)
704         << SerializeArgs(CommandLineArgs);
705     return false;
706   }
707 
708   // Setup string allocator.
709   llvm::BumpPtrAllocator Alloc;
710   llvm::StringSaver StringPool(Alloc);
711   auto SA = [&StringPool](const Twine &Arg) {
712     return StringPool.save(Arg).data();
713   };
714 
715   // Generate arguments from the dummy invocation. If Generate is the
716   // inverse of Parse, the newly generated arguments must have the same
717   // semantics as the original.
718   SmallVector<const char *> GeneratedArgs1;
719   Generate(DummyInvocation, GeneratedArgs1, SA);
720 
721   // Run the second parse, now on the generated arguments, and with the real
722   // invocation and diagnostics. The result is what we will end up using for the
723   // rest of compilation, so if Generate is not inverse of Parse, something down
724   // the line will break.
725   bool Success2 = Parse(RealInvocation, GeneratedArgs1, Diags, Argv0);
726 
727   // The first parse on original arguments succeeded, but second parse of
728   // generated arguments failed. Something must be wrong with the generator.
729   if (!Success2) {
730     Diags.Report(diag::err_cc1_round_trip_ok_then_fail);
731     Diags.Report(diag::note_cc1_round_trip_generated)
732         << 1 << SerializeArgs(GeneratedArgs1);
733     return false;
734   }
735 
736   // Generate arguments again, this time from the options we will end up using
737   // for the rest of the compilation.
738   SmallVector<const char *> GeneratedArgs2;
739   Generate(RealInvocation, GeneratedArgs2, SA);
740 
741   // Compares two lists of generated arguments.
742   auto Equal = [](const ArrayRef<const char *> A,
743                   const ArrayRef<const char *> B) {
744     return std::equal(A.begin(), A.end(), B.begin(), B.end(),
745                       [](const char *AElem, const char *BElem) {
746                         return StringRef(AElem) == StringRef(BElem);
747                       });
748   };
749 
750   // If we generated different arguments from what we assume are two
751   // semantically equivalent CompilerInvocations, the Generate function may
752   // be non-deterministic.
753   if (!Equal(GeneratedArgs1, GeneratedArgs2)) {
754     Diags.Report(diag::err_cc1_round_trip_mismatch);
755     Diags.Report(diag::note_cc1_round_trip_generated)
756         << 1 << SerializeArgs(GeneratedArgs1);
757     Diags.Report(diag::note_cc1_round_trip_generated)
758         << 2 << SerializeArgs(GeneratedArgs2);
759     return false;
760   }
761 
762   Diags.Report(diag::remark_cc1_round_trip_generated)
763       << 1 << SerializeArgs(GeneratedArgs1);
764   Diags.Report(diag::remark_cc1_round_trip_generated)
765       << 2 << SerializeArgs(GeneratedArgs2);
766 
767   return Success2;
768 }
769 
770 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
771                               OptSpecifier GroupWithValue,
772                               std::vector<std::string> &Diagnostics) {
773   for (auto *A : Args.filtered(Group)) {
774     if (A->getOption().getKind() == Option::FlagClass) {
775       // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
776       // its name (minus the "W" or "R" at the beginning) to the diagnostics.
777       Diagnostics.push_back(
778           std::string(A->getOption().getName().drop_front(1)));
779     } else if (A->getOption().matches(GroupWithValue)) {
780       // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic
781       // group. Add only the group name to the diagnostics.
782       Diagnostics.push_back(
783           std::string(A->getOption().getName().drop_front(1).rtrim("=-")));
784     } else {
785       // Otherwise, add its value (for OPT_W_Joined and similar).
786       Diagnostics.push_back(A->getValue());
787     }
788   }
789 }
790 
791 // Parse the Static Analyzer configuration. If \p Diags is set to nullptr,
792 // it won't verify the input.
793 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
794                                  DiagnosticsEngine *Diags);
795 
796 static void getAllNoBuiltinFuncValues(ArgList &Args,
797                                       std::vector<std::string> &Funcs) {
798   std::vector<std::string> Values = Args.getAllArgValues(OPT_fno_builtin_);
799   auto BuiltinEnd = llvm::partition(Values, Builtin::Context::isBuiltinFunc);
800   Funcs.insert(Funcs.end(), Values.begin(), BuiltinEnd);
801 }
802 
803 static void GenerateAnalyzerArgs(AnalyzerOptions &Opts,
804                                  SmallVectorImpl<const char *> &Args,
805                                  CompilerInvocation::StringAllocator SA) {
806   const AnalyzerOptions *AnalyzerOpts = &Opts;
807 
808 #define ANALYZER_OPTION_WITH_MARSHALLING(                                      \
809     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
810     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
811     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
812     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
813   GENERATE_OPTION_WITH_MARSHALLING(                                            \
814       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
815       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
816 #include "clang/Driver/Options.inc"
817 #undef ANALYZER_OPTION_WITH_MARSHALLING
818 
819   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
820     switch (Opts.AnalysisConstraintsOpt) {
821 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN)                     \
822   case NAME##Model:                                                            \
823     GenerateArg(Args, OPT_analyzer_constraints, CMDFLAG, SA);                  \
824     break;
825 #include "clang/StaticAnalyzer/Core/Analyses.def"
826     default:
827       llvm_unreachable("Tried to generate unknown analysis constraint.");
828     }
829   }
830 
831   if (Opts.AnalysisDiagOpt != PD_HTML) {
832     switch (Opts.AnalysisDiagOpt) {
833 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN)                     \
834   case PD_##NAME:                                                              \
835     GenerateArg(Args, OPT_analyzer_output, CMDFLAG, SA);                       \
836     break;
837 #include "clang/StaticAnalyzer/Core/Analyses.def"
838     default:
839       llvm_unreachable("Tried to generate unknown analysis diagnostic client.");
840     }
841   }
842 
843   if (Opts.AnalysisPurgeOpt != PurgeStmt) {
844     switch (Opts.AnalysisPurgeOpt) {
845 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC)                                    \
846   case NAME:                                                                   \
847     GenerateArg(Args, OPT_analyzer_purge, CMDFLAG, SA);                        \
848     break;
849 #include "clang/StaticAnalyzer/Core/Analyses.def"
850     default:
851       llvm_unreachable("Tried to generate unknown analysis purge mode.");
852     }
853   }
854 
855   if (Opts.InliningMode != NoRedundancy) {
856     switch (Opts.InliningMode) {
857 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC)                            \
858   case NAME:                                                                   \
859     GenerateArg(Args, OPT_analyzer_inlining_mode, CMDFLAG, SA);                \
860     break;
861 #include "clang/StaticAnalyzer/Core/Analyses.def"
862     default:
863       llvm_unreachable("Tried to generate unknown analysis inlining mode.");
864     }
865   }
866 
867   for (const auto &CP : Opts.CheckersAndPackages) {
868     OptSpecifier Opt =
869         CP.second ? OPT_analyzer_checker : OPT_analyzer_disable_checker;
870     GenerateArg(Args, Opt, CP.first, SA);
871   }
872 
873   AnalyzerOptions ConfigOpts;
874   parseAnalyzerConfigs(ConfigOpts, nullptr);
875 
876   for (const auto &C : Opts.Config) {
877     // Don't generate anything that came from parseAnalyzerConfigs. It would be
878     // redundant and may not be valid on the command line.
879     auto Entry = ConfigOpts.Config.find(C.getKey());
880     if (Entry != ConfigOpts.Config.end() && Entry->getValue() == C.getValue())
881       continue;
882 
883     GenerateArg(Args, OPT_analyzer_config, C.getKey() + "=" + C.getValue(), SA);
884   }
885 
886   // Nothing to generate for FullCompilerInvocation.
887 }
888 
889 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
890                               DiagnosticsEngine &Diags) {
891   unsigned NumErrorsBefore = Diags.getNumErrors();
892 
893   AnalyzerOptions *AnalyzerOpts = &Opts;
894 
895 #define ANALYZER_OPTION_WITH_MARSHALLING(                                      \
896     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
897     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
898     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
899     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
900   PARSE_OPTION_WITH_MARSHALLING(                                               \
901       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
902       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
903 #include "clang/Driver/Options.inc"
904 #undef ANALYZER_OPTION_WITH_MARSHALLING
905 
906   if (Args.hasArg(OPT_analyzer_store))
907     Diags.Report(diag::warn_analyzer_deprecated_option) << "-analyzer-store"
908                                                         << "clang-16";
909   if (Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks))
910     Diags.Report(diag::warn_analyzer_deprecated_option)
911         << "-analyzer-opt-analyze-nested-blocks"
912         << "clang-16";
913 
914   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
915     StringRef Name = A->getValue();
916     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
917 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
918       .Case(CMDFLAG, NAME##Model)
919 #include "clang/StaticAnalyzer/Core/Analyses.def"
920       .Default(NumConstraints);
921     if (Value == NumConstraints) {
922       Diags.Report(diag::err_drv_invalid_value)
923         << A->getAsString(Args) << Name;
924     } else {
925 #ifndef LLVM_WITH_Z3
926       if (Value == AnalysisConstraints::Z3ConstraintsModel) {
927         Diags.Report(diag::err_analyzer_not_built_with_z3);
928       }
929 #endif // LLVM_WITH_Z3
930       Opts.AnalysisConstraintsOpt = Value;
931     }
932   }
933 
934   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
935     StringRef Name = A->getValue();
936     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
937 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
938       .Case(CMDFLAG, PD_##NAME)
939 #include "clang/StaticAnalyzer/Core/Analyses.def"
940       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
941     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
942       Diags.Report(diag::err_drv_invalid_value)
943         << A->getAsString(Args) << Name;
944     } else {
945       Opts.AnalysisDiagOpt = Value;
946     }
947   }
948 
949   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
950     StringRef Name = A->getValue();
951     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
952 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
953       .Case(CMDFLAG, NAME)
954 #include "clang/StaticAnalyzer/Core/Analyses.def"
955       .Default(NumPurgeModes);
956     if (Value == NumPurgeModes) {
957       Diags.Report(diag::err_drv_invalid_value)
958         << A->getAsString(Args) << Name;
959     } else {
960       Opts.AnalysisPurgeOpt = Value;
961     }
962   }
963 
964   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
965     StringRef Name = A->getValue();
966     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
967 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
968       .Case(CMDFLAG, NAME)
969 #include "clang/StaticAnalyzer/Core/Analyses.def"
970       .Default(NumInliningModes);
971     if (Value == NumInliningModes) {
972       Diags.Report(diag::err_drv_invalid_value)
973         << A->getAsString(Args) << Name;
974     } else {
975       Opts.InliningMode = Value;
976     }
977   }
978 
979   Opts.CheckersAndPackages.clear();
980   for (const Arg *A :
981        Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
982     A->claim();
983     bool IsEnabled = A->getOption().getID() == OPT_analyzer_checker;
984     // We can have a list of comma separated checker names, e.g:
985     // '-analyzer-checker=cocoa,unix'
986     StringRef CheckerAndPackageList = A->getValue();
987     SmallVector<StringRef, 16> CheckersAndPackages;
988     CheckerAndPackageList.split(CheckersAndPackages, ",");
989     for (const StringRef &CheckerOrPackage : CheckersAndPackages)
990       Opts.CheckersAndPackages.emplace_back(std::string(CheckerOrPackage),
991                                             IsEnabled);
992   }
993 
994   // Go through the analyzer configuration options.
995   for (const auto *A : Args.filtered(OPT_analyzer_config)) {
996 
997     // We can have a list of comma separated config names, e.g:
998     // '-analyzer-config key1=val1,key2=val2'
999     StringRef configList = A->getValue();
1000     SmallVector<StringRef, 4> configVals;
1001     configList.split(configVals, ",");
1002     for (const auto &configVal : configVals) {
1003       StringRef key, val;
1004       std::tie(key, val) = configVal.split("=");
1005       if (val.empty()) {
1006         Diags.Report(SourceLocation(),
1007                      diag::err_analyzer_config_no_value) << configVal;
1008         break;
1009       }
1010       if (val.contains('=')) {
1011         Diags.Report(SourceLocation(),
1012                      diag::err_analyzer_config_multiple_values)
1013           << configVal;
1014         break;
1015       }
1016 
1017       // TODO: Check checker options too, possibly in CheckerRegistry.
1018       // Leave unknown non-checker configs unclaimed.
1019       if (!key.contains(":") && Opts.isUnknownAnalyzerConfig(key)) {
1020         if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
1021           Diags.Report(diag::err_analyzer_config_unknown) << key;
1022         continue;
1023       }
1024 
1025       A->claim();
1026       Opts.Config[key] = std::string(val);
1027     }
1028   }
1029 
1030   if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
1031     parseAnalyzerConfigs(Opts, &Diags);
1032   else
1033     parseAnalyzerConfigs(Opts, nullptr);
1034 
1035   llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
1036   for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
1037     if (i != 0)
1038       os << " ";
1039     os << Args.getArgString(i);
1040   }
1041   os.flush();
1042 
1043   return Diags.getNumErrors() == NumErrorsBefore;
1044 }
1045 
1046 static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
1047                                  StringRef OptionName, StringRef DefaultVal) {
1048   return Config.insert({OptionName, std::string(DefaultVal)}).first->second;
1049 }
1050 
1051 static void initOption(AnalyzerOptions::ConfigTable &Config,
1052                        DiagnosticsEngine *Diags,
1053                        StringRef &OptionField, StringRef Name,
1054                        StringRef DefaultVal) {
1055   // String options may be known to invalid (e.g. if the expected string is a
1056   // file name, but the file does not exist), those will have to be checked in
1057   // parseConfigs.
1058   OptionField = getStringOption(Config, Name, DefaultVal);
1059 }
1060 
1061 static void initOption(AnalyzerOptions::ConfigTable &Config,
1062                        DiagnosticsEngine *Diags,
1063                        bool &OptionField, StringRef Name, bool DefaultVal) {
1064   auto PossiblyInvalidVal = llvm::StringSwitch<Optional<bool>>(
1065                  getStringOption(Config, Name, (DefaultVal ? "true" : "false")))
1066       .Case("true", true)
1067       .Case("false", false)
1068       .Default(None);
1069 
1070   if (!PossiblyInvalidVal) {
1071     if (Diags)
1072       Diags->Report(diag::err_analyzer_config_invalid_input)
1073         << Name << "a boolean";
1074     else
1075       OptionField = DefaultVal;
1076   } else
1077     OptionField = *PossiblyInvalidVal;
1078 }
1079 
1080 static void initOption(AnalyzerOptions::ConfigTable &Config,
1081                        DiagnosticsEngine *Diags,
1082                        unsigned &OptionField, StringRef Name,
1083                        unsigned DefaultVal) {
1084 
1085   OptionField = DefaultVal;
1086   bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
1087                      .getAsInteger(0, OptionField);
1088   if (Diags && HasFailed)
1089     Diags->Report(diag::err_analyzer_config_invalid_input)
1090       << Name << "an unsigned";
1091 }
1092 
1093 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
1094                                  DiagnosticsEngine *Diags) {
1095   // TODO: There's no need to store the entire configtable, it'd be plenty
1096   // enough to store checker options.
1097 
1098 #define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL)                \
1099   initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);
1100 #define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(...)
1101 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
1102 
1103   assert(AnOpts.UserMode == "shallow" || AnOpts.UserMode == "deep");
1104   const bool InShallowMode = AnOpts.UserMode == "shallow";
1105 
1106 #define ANALYZER_OPTION(...)
1107 #define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC,        \
1108                                              SHALLOW_VAL, DEEP_VAL)            \
1109   initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG,                       \
1110              InShallowMode ? SHALLOW_VAL : DEEP_VAL);
1111 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
1112 
1113   // At this point, AnalyzerOptions is configured. Let's validate some options.
1114 
1115   // FIXME: Here we try to validate the silenced checkers or packages are valid.
1116   // The current approach only validates the registered checkers which does not
1117   // contain the runtime enabled checkers and optimally we would validate both.
1118   if (!AnOpts.RawSilencedCheckersAndPackages.empty()) {
1119     std::vector<StringRef> Checkers =
1120         AnOpts.getRegisteredCheckers(/*IncludeExperimental=*/true);
1121     std::vector<StringRef> Packages =
1122         AnOpts.getRegisteredPackages(/*IncludeExperimental=*/true);
1123 
1124     SmallVector<StringRef, 16> CheckersAndPackages;
1125     AnOpts.RawSilencedCheckersAndPackages.split(CheckersAndPackages, ";");
1126 
1127     for (const StringRef &CheckerOrPackage : CheckersAndPackages) {
1128       if (Diags) {
1129         bool IsChecker = CheckerOrPackage.contains('.');
1130         bool IsValidName = IsChecker
1131                                ? llvm::is_contained(Checkers, CheckerOrPackage)
1132                                : llvm::is_contained(Packages, CheckerOrPackage);
1133 
1134         if (!IsValidName)
1135           Diags->Report(diag::err_unknown_analyzer_checker_or_package)
1136               << CheckerOrPackage;
1137       }
1138 
1139       AnOpts.SilencedCheckersAndPackages.emplace_back(CheckerOrPackage);
1140     }
1141   }
1142 
1143   if (!Diags)
1144     return;
1145 
1146   if (AnOpts.ShouldTrackConditionsDebug && !AnOpts.ShouldTrackConditions)
1147     Diags->Report(diag::err_analyzer_config_invalid_input)
1148         << "track-conditions-debug" << "'track-conditions' to also be enabled";
1149 
1150   if (!AnOpts.CTUDir.empty() && !llvm::sys::fs::is_directory(AnOpts.CTUDir))
1151     Diags->Report(diag::err_analyzer_config_invalid_input) << "ctu-dir"
1152                                                            << "a filename";
1153 
1154   if (!AnOpts.ModelPath.empty() &&
1155       !llvm::sys::fs::is_directory(AnOpts.ModelPath))
1156     Diags->Report(diag::err_analyzer_config_invalid_input) << "model-path"
1157                                                            << "a filename";
1158 }
1159 
1160 /// Generate a remark argument. This is an inverse of `ParseOptimizationRemark`.
1161 static void
1162 GenerateOptimizationRemark(SmallVectorImpl<const char *> &Args,
1163                            CompilerInvocation::StringAllocator SA,
1164                            OptSpecifier OptEQ, StringRef Name,
1165                            const CodeGenOptions::OptRemark &Remark) {
1166   if (Remark.hasValidPattern()) {
1167     GenerateArg(Args, OptEQ, Remark.Pattern, SA);
1168   } else if (Remark.Kind == CodeGenOptions::RK_Enabled) {
1169     GenerateArg(Args, OPT_R_Joined, Name, SA);
1170   } else if (Remark.Kind == CodeGenOptions::RK_Disabled) {
1171     GenerateArg(Args, OPT_R_Joined, StringRef("no-") + Name, SA);
1172   }
1173 }
1174 
1175 /// Parse a remark command line argument. It may be missing, disabled/enabled by
1176 /// '-R[no-]group' or specified with a regular expression by '-Rgroup=regexp'.
1177 /// On top of that, it can be disabled/enabled globally by '-R[no-]everything'.
1178 static CodeGenOptions::OptRemark
1179 ParseOptimizationRemark(DiagnosticsEngine &Diags, ArgList &Args,
1180                         OptSpecifier OptEQ, StringRef Name) {
1181   CodeGenOptions::OptRemark Result;
1182 
1183   auto InitializeResultPattern = [&Diags, &Args, &Result](const Arg *A,
1184                                                           StringRef Pattern) {
1185     Result.Pattern = Pattern.str();
1186 
1187     std::string RegexError;
1188     Result.Regex = std::make_shared<llvm::Regex>(Result.Pattern);
1189     if (!Result.Regex->isValid(RegexError)) {
1190       Diags.Report(diag::err_drv_optimization_remark_pattern)
1191           << RegexError << A->getAsString(Args);
1192       return false;
1193     }
1194 
1195     return true;
1196   };
1197 
1198   for (Arg *A : Args) {
1199     if (A->getOption().matches(OPT_R_Joined)) {
1200       StringRef Value = A->getValue();
1201 
1202       if (Value == Name)
1203         Result.Kind = CodeGenOptions::RK_Enabled;
1204       else if (Value == "everything")
1205         Result.Kind = CodeGenOptions::RK_EnabledEverything;
1206       else if (Value.split('-') == std::make_pair(StringRef("no"), Name))
1207         Result.Kind = CodeGenOptions::RK_Disabled;
1208       else if (Value == "no-everything")
1209         Result.Kind = CodeGenOptions::RK_DisabledEverything;
1210       else
1211         continue;
1212 
1213       if (Result.Kind == CodeGenOptions::RK_Disabled ||
1214           Result.Kind == CodeGenOptions::RK_DisabledEverything) {
1215         Result.Pattern = "";
1216         Result.Regex = nullptr;
1217       } else {
1218         InitializeResultPattern(A, ".*");
1219       }
1220     } else if (A->getOption().matches(OptEQ)) {
1221       Result.Kind = CodeGenOptions::RK_WithPattern;
1222       if (!InitializeResultPattern(A, A->getValue()))
1223         return CodeGenOptions::OptRemark();
1224     }
1225   }
1226 
1227   return Result;
1228 }
1229 
1230 static bool parseDiagnosticLevelMask(StringRef FlagName,
1231                                      const std::vector<std::string> &Levels,
1232                                      DiagnosticsEngine &Diags,
1233                                      DiagnosticLevelMask &M) {
1234   bool Success = true;
1235   for (const auto &Level : Levels) {
1236     DiagnosticLevelMask const PM =
1237       llvm::StringSwitch<DiagnosticLevelMask>(Level)
1238         .Case("note",    DiagnosticLevelMask::Note)
1239         .Case("remark",  DiagnosticLevelMask::Remark)
1240         .Case("warning", DiagnosticLevelMask::Warning)
1241         .Case("error",   DiagnosticLevelMask::Error)
1242         .Default(DiagnosticLevelMask::None);
1243     if (PM == DiagnosticLevelMask::None) {
1244       Success = false;
1245       Diags.Report(diag::err_drv_invalid_value) << FlagName << Level;
1246     }
1247     M = M | PM;
1248   }
1249   return Success;
1250 }
1251 
1252 static void parseSanitizerKinds(StringRef FlagName,
1253                                 const std::vector<std::string> &Sanitizers,
1254                                 DiagnosticsEngine &Diags, SanitizerSet &S) {
1255   for (const auto &Sanitizer : Sanitizers) {
1256     SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
1257     if (K == SanitizerMask())
1258       Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
1259     else
1260       S.set(K, true);
1261   }
1262 }
1263 
1264 static SmallVector<StringRef, 4> serializeSanitizerKinds(SanitizerSet S) {
1265   SmallVector<StringRef, 4> Values;
1266   serializeSanitizerSet(S, Values);
1267   return Values;
1268 }
1269 
1270 static void parseXRayInstrumentationBundle(StringRef FlagName, StringRef Bundle,
1271                                            ArgList &Args, DiagnosticsEngine &D,
1272                                            XRayInstrSet &S) {
1273   llvm::SmallVector<StringRef, 2> BundleParts;
1274   llvm::SplitString(Bundle, BundleParts, ",");
1275   for (const auto &B : BundleParts) {
1276     auto Mask = parseXRayInstrValue(B);
1277     if (Mask == XRayInstrKind::None)
1278       if (B != "none")
1279         D.Report(diag::err_drv_invalid_value) << FlagName << Bundle;
1280       else
1281         S.Mask = Mask;
1282     else if (Mask == XRayInstrKind::All)
1283       S.Mask = Mask;
1284     else
1285       S.set(Mask, true);
1286   }
1287 }
1288 
1289 static std::string serializeXRayInstrumentationBundle(const XRayInstrSet &S) {
1290   llvm::SmallVector<StringRef, 2> BundleParts;
1291   serializeXRayInstrValue(S, BundleParts);
1292   std::string Buffer;
1293   llvm::raw_string_ostream OS(Buffer);
1294   llvm::interleave(BundleParts, OS, [&OS](StringRef Part) { OS << Part; }, ",");
1295   return Buffer;
1296 }
1297 
1298 // Set the profile kind using fprofile-instrument-use-path.
1299 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
1300                                   const Twine &ProfileName) {
1301   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
1302   // In error, return silently and let Clang PGOUse report the error message.
1303   if (auto E = ReaderOrErr.takeError()) {
1304     llvm::consumeError(std::move(E));
1305     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
1306     return;
1307   }
1308   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
1309     std::move(ReaderOrErr.get());
1310   if (PGOReader->isIRLevelProfile()) {
1311     if (PGOReader->hasCSIRLevelProfile())
1312       Opts.setProfileUse(CodeGenOptions::ProfileCSIRInstr);
1313     else
1314       Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
1315   } else
1316     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
1317 }
1318 
1319 void CompilerInvocation::GenerateCodeGenArgs(
1320     const CodeGenOptions &Opts, SmallVectorImpl<const char *> &Args,
1321     StringAllocator SA, const llvm::Triple &T, const std::string &OutputFile,
1322     const LangOptions *LangOpts) {
1323   const CodeGenOptions &CodeGenOpts = Opts;
1324 
1325   if (Opts.OptimizationLevel == 0)
1326     GenerateArg(Args, OPT_O0, SA);
1327   else
1328     GenerateArg(Args, OPT_O, Twine(Opts.OptimizationLevel), SA);
1329 
1330 #define CODEGEN_OPTION_WITH_MARSHALLING(                                       \
1331     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1332     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1333     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1334     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1335   GENERATE_OPTION_WITH_MARSHALLING(                                            \
1336       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
1337       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
1338 #include "clang/Driver/Options.inc"
1339 #undef CODEGEN_OPTION_WITH_MARSHALLING
1340 
1341   if (Opts.OptimizationLevel > 0) {
1342     if (Opts.Inlining == CodeGenOptions::NormalInlining)
1343       GenerateArg(Args, OPT_finline_functions, SA);
1344     else if (Opts.Inlining == CodeGenOptions::OnlyHintInlining)
1345       GenerateArg(Args, OPT_finline_hint_functions, SA);
1346     else if (Opts.Inlining == CodeGenOptions::OnlyAlwaysInlining)
1347       GenerateArg(Args, OPT_fno_inline, SA);
1348   }
1349 
1350   if (Opts.DirectAccessExternalData && LangOpts->PICLevel != 0)
1351     GenerateArg(Args, OPT_fdirect_access_external_data, SA);
1352   else if (!Opts.DirectAccessExternalData && LangOpts->PICLevel == 0)
1353     GenerateArg(Args, OPT_fno_direct_access_external_data, SA);
1354 
1355   Optional<StringRef> DebugInfoVal;
1356   switch (Opts.DebugInfo) {
1357   case codegenoptions::DebugLineTablesOnly:
1358     DebugInfoVal = "line-tables-only";
1359     break;
1360   case codegenoptions::DebugDirectivesOnly:
1361     DebugInfoVal = "line-directives-only";
1362     break;
1363   case codegenoptions::LimitedDebugInfo:
1364     DebugInfoVal = "limited";
1365     break;
1366   case codegenoptions::FullDebugInfo:
1367     DebugInfoVal = "standalone";
1368     break;
1369   case codegenoptions::UnusedTypeInfo:
1370     DebugInfoVal = "unused-types";
1371     break;
1372   case codegenoptions::NoDebugInfo: // default value
1373     DebugInfoVal = None;
1374     break;
1375   case codegenoptions::LocTrackingOnly: // implied value
1376     DebugInfoVal = None;
1377     break;
1378   }
1379   if (DebugInfoVal)
1380     GenerateArg(Args, OPT_debug_info_kind_EQ, *DebugInfoVal, SA);
1381 
1382   for (const auto &Prefix : Opts.DebugPrefixMap)
1383     GenerateArg(Args, OPT_fdebug_prefix_map_EQ,
1384                 Prefix.first + "=" + Prefix.second, SA);
1385 
1386   for (const auto &Prefix : Opts.CoveragePrefixMap)
1387     GenerateArg(Args, OPT_fcoverage_prefix_map_EQ,
1388                 Prefix.first + "=" + Prefix.second, SA);
1389 
1390   if (Opts.NewStructPathTBAA)
1391     GenerateArg(Args, OPT_new_struct_path_tbaa, SA);
1392 
1393   if (Opts.OptimizeSize == 1)
1394     GenerateArg(Args, OPT_O, "s", SA);
1395   else if (Opts.OptimizeSize == 2)
1396     GenerateArg(Args, OPT_O, "z", SA);
1397 
1398   // SimplifyLibCalls is set only in the absence of -fno-builtin and
1399   // -ffreestanding. We'll consider that when generating them.
1400 
1401   // NoBuiltinFuncs are generated by LangOptions.
1402 
1403   if (Opts.UnrollLoops && Opts.OptimizationLevel <= 1)
1404     GenerateArg(Args, OPT_funroll_loops, SA);
1405   else if (!Opts.UnrollLoops && Opts.OptimizationLevel > 1)
1406     GenerateArg(Args, OPT_fno_unroll_loops, SA);
1407 
1408   if (!Opts.BinutilsVersion.empty())
1409     GenerateArg(Args, OPT_fbinutils_version_EQ, Opts.BinutilsVersion, SA);
1410 
1411   if (Opts.DebugNameTable ==
1412       static_cast<unsigned>(llvm::DICompileUnit::DebugNameTableKind::GNU))
1413     GenerateArg(Args, OPT_ggnu_pubnames, SA);
1414   else if (Opts.DebugNameTable ==
1415            static_cast<unsigned>(
1416                llvm::DICompileUnit::DebugNameTableKind::Default))
1417     GenerateArg(Args, OPT_gpubnames, SA);
1418 
1419   auto TNK = Opts.getDebugSimpleTemplateNames();
1420   if (TNK != codegenoptions::DebugTemplateNamesKind::Full) {
1421     if (TNK == codegenoptions::DebugTemplateNamesKind::Simple)
1422       GenerateArg(Args, OPT_gsimple_template_names_EQ, "simple", SA);
1423     else if (TNK == codegenoptions::DebugTemplateNamesKind::Mangled)
1424       GenerateArg(Args, OPT_gsimple_template_names_EQ, "mangled", SA);
1425   }
1426   // ProfileInstrumentUsePath is marshalled automatically, no need to generate
1427   // it or PGOUseInstrumentor.
1428 
1429   if (Opts.TimePasses) {
1430     if (Opts.TimePassesPerRun)
1431       GenerateArg(Args, OPT_ftime_report_EQ, "per-pass-run", SA);
1432     else
1433       GenerateArg(Args, OPT_ftime_report, SA);
1434   }
1435 
1436   if (Opts.PrepareForLTO && !Opts.PrepareForThinLTO)
1437     GenerateArg(Args, OPT_flto_EQ, "full", SA);
1438 
1439   if (Opts.PrepareForThinLTO)
1440     GenerateArg(Args, OPT_flto_EQ, "thin", SA);
1441 
1442   if (!Opts.ThinLTOIndexFile.empty())
1443     GenerateArg(Args, OPT_fthinlto_index_EQ, Opts.ThinLTOIndexFile, SA);
1444 
1445   if (Opts.SaveTempsFilePrefix == OutputFile)
1446     GenerateArg(Args, OPT_save_temps_EQ, "obj", SA);
1447 
1448   StringRef MemProfileBasename("memprof.profraw");
1449   if (!Opts.MemoryProfileOutput.empty()) {
1450     if (Opts.MemoryProfileOutput == MemProfileBasename) {
1451       GenerateArg(Args, OPT_fmemory_profile, SA);
1452     } else {
1453       size_t ArgLength =
1454           Opts.MemoryProfileOutput.size() - MemProfileBasename.size();
1455       GenerateArg(Args, OPT_fmemory_profile_EQ,
1456                   Opts.MemoryProfileOutput.substr(0, ArgLength), SA);
1457     }
1458   }
1459 
1460   if (memcmp(Opts.CoverageVersion, "408*", 4) != 0)
1461     GenerateArg(Args, OPT_coverage_version_EQ,
1462                 StringRef(Opts.CoverageVersion, 4), SA);
1463 
1464   // TODO: Check if we need to generate arguments stored in CmdArgs. (Namely
1465   //  '-fembed_bitcode', which does not map to any CompilerInvocation field and
1466   //  won't be generated.)
1467 
1468   if (Opts.XRayInstrumentationBundle.Mask != XRayInstrKind::All) {
1469     std::string InstrBundle =
1470         serializeXRayInstrumentationBundle(Opts.XRayInstrumentationBundle);
1471     if (!InstrBundle.empty())
1472       GenerateArg(Args, OPT_fxray_instrumentation_bundle, InstrBundle, SA);
1473   }
1474 
1475   if (Opts.CFProtectionReturn && Opts.CFProtectionBranch)
1476     GenerateArg(Args, OPT_fcf_protection_EQ, "full", SA);
1477   else if (Opts.CFProtectionReturn)
1478     GenerateArg(Args, OPT_fcf_protection_EQ, "return", SA);
1479   else if (Opts.CFProtectionBranch)
1480     GenerateArg(Args, OPT_fcf_protection_EQ, "branch", SA);
1481 
1482   if (Opts.IBTSeal)
1483     GenerateArg(Args, OPT_mibt_seal, SA);
1484 
1485   for (const auto &F : Opts.LinkBitcodeFiles) {
1486     bool Builtint = F.LinkFlags == llvm::Linker::Flags::LinkOnlyNeeded &&
1487                     F.PropagateAttrs && F.Internalize;
1488     GenerateArg(Args,
1489                 Builtint ? OPT_mlink_builtin_bitcode : OPT_mlink_bitcode_file,
1490                 F.Filename, SA);
1491   }
1492 
1493   // TODO: Consider removing marshalling annotations from f[no_]emulated_tls.
1494   //  That would make it easy to generate the option only **once** if it was
1495   //  explicitly set to non-default value.
1496   if (Opts.ExplicitEmulatedTLS) {
1497     GenerateArg(
1498         Args, Opts.EmulatedTLS ? OPT_femulated_tls : OPT_fno_emulated_tls, SA);
1499   }
1500 
1501   if (Opts.FPDenormalMode != llvm::DenormalMode::getIEEE())
1502     GenerateArg(Args, OPT_fdenormal_fp_math_EQ, Opts.FPDenormalMode.str(), SA);
1503 
1504   if ((Opts.FPDenormalMode != Opts.FP32DenormalMode) ||
1505       (Opts.FP32DenormalMode != llvm::DenormalMode::getIEEE()))
1506     GenerateArg(Args, OPT_fdenormal_fp_math_f32_EQ, Opts.FP32DenormalMode.str(),
1507                 SA);
1508 
1509   if (Opts.StructReturnConvention == CodeGenOptions::SRCK_OnStack) {
1510     OptSpecifier Opt =
1511         T.isPPC32() ? OPT_maix_struct_return : OPT_fpcc_struct_return;
1512     GenerateArg(Args, Opt, SA);
1513   } else if (Opts.StructReturnConvention == CodeGenOptions::SRCK_InRegs) {
1514     OptSpecifier Opt =
1515         T.isPPC32() ? OPT_msvr4_struct_return : OPT_freg_struct_return;
1516     GenerateArg(Args, Opt, SA);
1517   }
1518 
1519   if (Opts.EnableAIXExtendedAltivecABI)
1520     GenerateArg(Args, OPT_mabi_EQ_vec_extabi, SA);
1521 
1522   if (!Opts.OptRecordPasses.empty())
1523     GenerateArg(Args, OPT_opt_record_passes, Opts.OptRecordPasses, SA);
1524 
1525   if (!Opts.OptRecordFormat.empty())
1526     GenerateArg(Args, OPT_opt_record_format, Opts.OptRecordFormat, SA);
1527 
1528   GenerateOptimizationRemark(Args, SA, OPT_Rpass_EQ, "pass",
1529                              Opts.OptimizationRemark);
1530 
1531   GenerateOptimizationRemark(Args, SA, OPT_Rpass_missed_EQ, "pass-missed",
1532                              Opts.OptimizationRemarkMissed);
1533 
1534   GenerateOptimizationRemark(Args, SA, OPT_Rpass_analysis_EQ, "pass-analysis",
1535                              Opts.OptimizationRemarkAnalysis);
1536 
1537   GenerateArg(Args, OPT_fdiagnostics_hotness_threshold_EQ,
1538               Opts.DiagnosticsHotnessThreshold
1539                   ? Twine(*Opts.DiagnosticsHotnessThreshold)
1540                   : "auto",
1541               SA);
1542 
1543   GenerateArg(Args, OPT_fdiagnostics_misexpect_tolerance_EQ,
1544               Twine(*Opts.DiagnosticsMisExpectTolerance), SA);
1545 
1546   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeRecover))
1547     GenerateArg(Args, OPT_fsanitize_recover_EQ, Sanitizer, SA);
1548 
1549   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeTrap))
1550     GenerateArg(Args, OPT_fsanitize_trap_EQ, Sanitizer, SA);
1551 
1552   if (!Opts.EmitVersionIdentMetadata)
1553     GenerateArg(Args, OPT_Qn, SA);
1554 
1555   switch (Opts.FiniteLoops) {
1556   case CodeGenOptions::FiniteLoopsKind::Language:
1557     break;
1558   case CodeGenOptions::FiniteLoopsKind::Always:
1559     GenerateArg(Args, OPT_ffinite_loops, SA);
1560     break;
1561   case CodeGenOptions::FiniteLoopsKind::Never:
1562     GenerateArg(Args, OPT_fno_finite_loops, SA);
1563     break;
1564   }
1565 }
1566 
1567 bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
1568                                           InputKind IK,
1569                                           DiagnosticsEngine &Diags,
1570                                           const llvm::Triple &T,
1571                                           const std::string &OutputFile,
1572                                           const LangOptions &LangOptsRef) {
1573   unsigned NumErrorsBefore = Diags.getNumErrors();
1574 
1575   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
1576   // TODO: This could be done in Driver
1577   unsigned MaxOptLevel = 3;
1578   if (OptimizationLevel > MaxOptLevel) {
1579     // If the optimization level is not supported, fall back on the default
1580     // optimization
1581     Diags.Report(diag::warn_drv_optimization_value)
1582         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
1583     OptimizationLevel = MaxOptLevel;
1584   }
1585   Opts.OptimizationLevel = OptimizationLevel;
1586 
1587   // The key paths of codegen options defined in Options.td start with
1588   // "CodeGenOpts.". Let's provide the expected variable name and type.
1589   CodeGenOptions &CodeGenOpts = Opts;
1590   // Some codegen options depend on language options. Let's provide the expected
1591   // variable name and type.
1592   const LangOptions *LangOpts = &LangOptsRef;
1593 
1594 #define CODEGEN_OPTION_WITH_MARSHALLING(                                       \
1595     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
1596     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
1597     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
1598     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
1599   PARSE_OPTION_WITH_MARSHALLING(                                               \
1600       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
1601       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
1602 #include "clang/Driver/Options.inc"
1603 #undef CODEGEN_OPTION_WITH_MARSHALLING
1604 
1605   // At O0 we want to fully disable inlining outside of cases marked with
1606   // 'alwaysinline' that are required for correctness.
1607   if (Opts.OptimizationLevel == 0) {
1608     Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
1609   } else if (const Arg *A = Args.getLastArg(options::OPT_finline_functions,
1610                                             options::OPT_finline_hint_functions,
1611                                             options::OPT_fno_inline_functions,
1612                                             options::OPT_fno_inline)) {
1613     // Explicit inlining flags can disable some or all inlining even at
1614     // optimization levels above zero.
1615     if (A->getOption().matches(options::OPT_finline_functions))
1616       Opts.setInlining(CodeGenOptions::NormalInlining);
1617     else if (A->getOption().matches(options::OPT_finline_hint_functions))
1618       Opts.setInlining(CodeGenOptions::OnlyHintInlining);
1619     else
1620       Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
1621   } else {
1622     Opts.setInlining(CodeGenOptions::NormalInlining);
1623   }
1624 
1625   // PIC defaults to -fno-direct-access-external-data while non-PIC defaults to
1626   // -fdirect-access-external-data.
1627   Opts.DirectAccessExternalData =
1628       Args.hasArg(OPT_fdirect_access_external_data) ||
1629       (!Args.hasArg(OPT_fno_direct_access_external_data) &&
1630        LangOpts->PICLevel == 0);
1631 
1632   if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
1633     unsigned Val =
1634         llvm::StringSwitch<unsigned>(A->getValue())
1635             .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
1636             .Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
1637             .Case("limited", codegenoptions::LimitedDebugInfo)
1638             .Case("standalone", codegenoptions::FullDebugInfo)
1639             .Case("unused-types", codegenoptions::UnusedTypeInfo)
1640             .Default(~0U);
1641     if (Val == ~0U)
1642       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1643                                                 << A->getValue();
1644     else
1645       Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
1646   }
1647 
1648   for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ)) {
1649     auto Split = StringRef(Arg).split('=');
1650     Opts.DebugPrefixMap.insert(
1651         {std::string(Split.first), std::string(Split.second)});
1652   }
1653 
1654   for (const auto &Arg : Args.getAllArgValues(OPT_fcoverage_prefix_map_EQ)) {
1655     auto Split = StringRef(Arg).split('=');
1656     Opts.CoveragePrefixMap.insert(
1657         {std::string(Split.first), std::string(Split.second)});
1658   }
1659 
1660   const llvm::Triple::ArchType DebugEntryValueArchs[] = {
1661       llvm::Triple::x86, llvm::Triple::x86_64, llvm::Triple::aarch64,
1662       llvm::Triple::arm, llvm::Triple::armeb, llvm::Triple::mips,
1663       llvm::Triple::mipsel, llvm::Triple::mips64, llvm::Triple::mips64el};
1664 
1665   if (Opts.OptimizationLevel > 0 && Opts.hasReducedDebugInfo() &&
1666       llvm::is_contained(DebugEntryValueArchs, T.getArch()))
1667     Opts.EmitCallSiteInfo = true;
1668 
1669   if (!Opts.EnableDIPreservationVerify && Opts.DIBugsReportFilePath.size()) {
1670     Diags.Report(diag::warn_ignoring_verify_debuginfo_preserve_export)
1671         << Opts.DIBugsReportFilePath;
1672     Opts.DIBugsReportFilePath = "";
1673   }
1674 
1675   Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
1676                            Args.hasArg(OPT_new_struct_path_tbaa);
1677   Opts.OptimizeSize = getOptimizationLevelSize(Args);
1678   Opts.SimplifyLibCalls = !LangOpts->NoBuiltin;
1679   if (Opts.SimplifyLibCalls)
1680     Opts.NoBuiltinFuncs = LangOpts->NoBuiltinFuncs;
1681   Opts.UnrollLoops =
1682       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
1683                    (Opts.OptimizationLevel > 1));
1684   Opts.BinutilsVersion =
1685       std::string(Args.getLastArgValue(OPT_fbinutils_version_EQ));
1686 
1687   Opts.DebugNameTable = static_cast<unsigned>(
1688       Args.hasArg(OPT_ggnu_pubnames)
1689           ? llvm::DICompileUnit::DebugNameTableKind::GNU
1690           : Args.hasArg(OPT_gpubnames)
1691                 ? llvm::DICompileUnit::DebugNameTableKind::Default
1692                 : llvm::DICompileUnit::DebugNameTableKind::None);
1693   if (const Arg *A = Args.getLastArg(OPT_gsimple_template_names_EQ)) {
1694     StringRef Value = A->getValue();
1695     if (Value != "simple" && Value != "mangled")
1696       Diags.Report(diag::err_drv_unsupported_option_argument)
1697           << A->getOption().getName() << A->getValue();
1698     Opts.setDebugSimpleTemplateNames(
1699         StringRef(A->getValue()) == "simple"
1700             ? codegenoptions::DebugTemplateNamesKind::Simple
1701             : codegenoptions::DebugTemplateNamesKind::Mangled);
1702   }
1703 
1704   if (!Opts.ProfileInstrumentUsePath.empty())
1705     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
1706 
1707   if (const Arg *A = Args.getLastArg(OPT_ftime_report, OPT_ftime_report_EQ)) {
1708     Opts.TimePasses = true;
1709 
1710     // -ftime-report= is only for new pass manager.
1711     if (A->getOption().getID() == OPT_ftime_report_EQ) {
1712       StringRef Val = A->getValue();
1713       if (Val == "per-pass")
1714         Opts.TimePassesPerRun = false;
1715       else if (Val == "per-pass-run")
1716         Opts.TimePassesPerRun = true;
1717       else
1718         Diags.Report(diag::err_drv_invalid_value)
1719             << A->getAsString(Args) << A->getValue();
1720     }
1721   }
1722 
1723   Opts.PrepareForLTO = false;
1724   Opts.PrepareForThinLTO = false;
1725   if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
1726     Opts.PrepareForLTO = true;
1727     StringRef S = A->getValue();
1728     if (S == "thin")
1729       Opts.PrepareForThinLTO = true;
1730     else if (S != "full")
1731       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
1732   }
1733   if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
1734     if (IK.getLanguage() != Language::LLVM_IR)
1735       Diags.Report(diag::err_drv_argument_only_allowed_with)
1736           << A->getAsString(Args) << "-x ir";
1737     Opts.ThinLTOIndexFile =
1738         std::string(Args.getLastArgValue(OPT_fthinlto_index_EQ));
1739   }
1740   if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
1741     Opts.SaveTempsFilePrefix =
1742         llvm::StringSwitch<std::string>(A->getValue())
1743             .Case("obj", OutputFile)
1744             .Default(llvm::sys::path::filename(OutputFile).str());
1745 
1746   // The memory profile runtime appends the pid to make this name more unique.
1747   const char *MemProfileBasename = "memprof.profraw";
1748   if (Args.hasArg(OPT_fmemory_profile_EQ)) {
1749     SmallString<128> Path(
1750         std::string(Args.getLastArgValue(OPT_fmemory_profile_EQ)));
1751     llvm::sys::path::append(Path, MemProfileBasename);
1752     Opts.MemoryProfileOutput = std::string(Path);
1753   } else if (Args.hasArg(OPT_fmemory_profile))
1754     Opts.MemoryProfileOutput = MemProfileBasename;
1755 
1756   memcpy(Opts.CoverageVersion, "408*", 4);
1757   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
1758     if (Args.hasArg(OPT_coverage_version_EQ)) {
1759       StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
1760       if (CoverageVersion.size() != 4) {
1761         Diags.Report(diag::err_drv_invalid_value)
1762             << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
1763             << CoverageVersion;
1764       } else {
1765         memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
1766       }
1767     }
1768   }
1769   // FIXME: For backend options that are not yet recorded as function
1770   // attributes in the IR, keep track of them so we can embed them in a
1771   // separate data section and use them when building the bitcode.
1772   for (const auto &A : Args) {
1773     // Do not encode output and input.
1774     if (A->getOption().getID() == options::OPT_o ||
1775         A->getOption().getID() == options::OPT_INPUT ||
1776         A->getOption().getID() == options::OPT_x ||
1777         A->getOption().getID() == options::OPT_fembed_bitcode ||
1778         A->getOption().matches(options::OPT_W_Group))
1779       continue;
1780     ArgStringList ASL;
1781     A->render(Args, ASL);
1782     for (const auto &arg : ASL) {
1783       StringRef ArgStr(arg);
1784       Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
1785       // using \00 to separate each commandline options.
1786       Opts.CmdArgs.push_back('\0');
1787     }
1788   }
1789 
1790   auto XRayInstrBundles =
1791       Args.getAllArgValues(OPT_fxray_instrumentation_bundle);
1792   if (XRayInstrBundles.empty())
1793     Opts.XRayInstrumentationBundle.Mask = XRayInstrKind::All;
1794   else
1795     for (const auto &A : XRayInstrBundles)
1796       parseXRayInstrumentationBundle("-fxray-instrumentation-bundle=", A, Args,
1797                                      Diags, Opts.XRayInstrumentationBundle);
1798 
1799   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
1800     StringRef Name = A->getValue();
1801     if (Name == "full") {
1802       Opts.CFProtectionReturn = 1;
1803       Opts.CFProtectionBranch = 1;
1804     } else if (Name == "return")
1805       Opts.CFProtectionReturn = 1;
1806     else if (Name == "branch")
1807       Opts.CFProtectionBranch = 1;
1808     else if (Name != "none")
1809       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1810   }
1811 
1812   if (Opts.PrepareForLTO && Args.hasArg(OPT_mibt_seal))
1813     Opts.IBTSeal = 1;
1814 
1815   for (auto *A :
1816        Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_builtin_bitcode)) {
1817     CodeGenOptions::BitcodeFileToLink F;
1818     F.Filename = A->getValue();
1819     if (A->getOption().matches(OPT_mlink_builtin_bitcode)) {
1820       F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
1821       // When linking CUDA bitcode, propagate function attributes so that
1822       // e.g. libdevice gets fast-math attrs if we're building with fast-math.
1823       F.PropagateAttrs = true;
1824       F.Internalize = true;
1825     }
1826     Opts.LinkBitcodeFiles.push_back(F);
1827   }
1828 
1829   if (Args.getLastArg(OPT_femulated_tls) ||
1830       Args.getLastArg(OPT_fno_emulated_tls)) {
1831     Opts.ExplicitEmulatedTLS = true;
1832   }
1833 
1834   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1835     if (T.isOSAIX()) {
1836       StringRef Name = A->getValue();
1837       if (Name != "global-dynamic")
1838         Diags.Report(diag::err_aix_unsupported_tls_model) << Name;
1839     }
1840   }
1841 
1842   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
1843     StringRef Val = A->getValue();
1844     Opts.FPDenormalMode = llvm::parseDenormalFPAttribute(Val);
1845     Opts.FP32DenormalMode = Opts.FPDenormalMode;
1846     if (!Opts.FPDenormalMode.isValid())
1847       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1848   }
1849 
1850   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_f32_EQ)) {
1851     StringRef Val = A->getValue();
1852     Opts.FP32DenormalMode = llvm::parseDenormalFPAttribute(Val);
1853     if (!Opts.FP32DenormalMode.isValid())
1854       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1855   }
1856 
1857   // X86_32 has -fppc-struct-return and -freg-struct-return.
1858   // PPC32 has -maix-struct-return and -msvr4-struct-return.
1859   if (Arg *A =
1860           Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return,
1861                           OPT_maix_struct_return, OPT_msvr4_struct_return)) {
1862     // TODO: We might want to consider enabling these options on AIX in the
1863     // future.
1864     if (T.isOSAIX())
1865       Diags.Report(diag::err_drv_unsupported_opt_for_target)
1866           << A->getSpelling() << T.str();
1867 
1868     const Option &O = A->getOption();
1869     if (O.matches(OPT_fpcc_struct_return) ||
1870         O.matches(OPT_maix_struct_return)) {
1871       Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
1872     } else {
1873       assert(O.matches(OPT_freg_struct_return) ||
1874              O.matches(OPT_msvr4_struct_return));
1875       Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
1876     }
1877   }
1878 
1879   if (Arg *A =
1880           Args.getLastArg(OPT_mabi_EQ_vec_default, OPT_mabi_EQ_vec_extabi)) {
1881     if (!T.isOSAIX())
1882       Diags.Report(diag::err_drv_unsupported_opt_for_target)
1883           << A->getSpelling() << T.str();
1884 
1885     const Option &O = A->getOption();
1886     Opts.EnableAIXExtendedAltivecABI = O.matches(OPT_mabi_EQ_vec_extabi);
1887   }
1888 
1889   bool NeedLocTracking = false;
1890 
1891   if (!Opts.OptRecordFile.empty())
1892     NeedLocTracking = true;
1893 
1894   if (Arg *A = Args.getLastArg(OPT_opt_record_passes)) {
1895     Opts.OptRecordPasses = A->getValue();
1896     NeedLocTracking = true;
1897   }
1898 
1899   if (Arg *A = Args.getLastArg(OPT_opt_record_format)) {
1900     Opts.OptRecordFormat = A->getValue();
1901     NeedLocTracking = true;
1902   }
1903 
1904   Opts.OptimizationRemark =
1905       ParseOptimizationRemark(Diags, Args, OPT_Rpass_EQ, "pass");
1906 
1907   Opts.OptimizationRemarkMissed =
1908       ParseOptimizationRemark(Diags, Args, OPT_Rpass_missed_EQ, "pass-missed");
1909 
1910   Opts.OptimizationRemarkAnalysis = ParseOptimizationRemark(
1911       Diags, Args, OPT_Rpass_analysis_EQ, "pass-analysis");
1912 
1913   NeedLocTracking |= Opts.OptimizationRemark.hasValidPattern() ||
1914                      Opts.OptimizationRemarkMissed.hasValidPattern() ||
1915                      Opts.OptimizationRemarkAnalysis.hasValidPattern();
1916 
1917   bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
1918   bool UsingProfile = UsingSampleProfile ||
1919       (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
1920 
1921   if (Opts.DiagnosticsWithHotness && !UsingProfile &&
1922       // An IR file will contain PGO as metadata
1923       IK.getLanguage() != Language::LLVM_IR)
1924     Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1925         << "-fdiagnostics-show-hotness";
1926 
1927   // Parse remarks hotness threshold. Valid value is either integer or 'auto'.
1928   if (auto *arg =
1929           Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
1930     auto ResultOrErr =
1931         llvm::remarks::parseHotnessThresholdOption(arg->getValue());
1932 
1933     if (!ResultOrErr) {
1934       Diags.Report(diag::err_drv_invalid_diagnotics_hotness_threshold)
1935           << "-fdiagnostics-hotness-threshold=";
1936     } else {
1937       Opts.DiagnosticsHotnessThreshold = *ResultOrErr;
1938       if ((!Opts.DiagnosticsHotnessThreshold.hasValue() ||
1939            Opts.DiagnosticsHotnessThreshold.getValue() > 0) &&
1940           !UsingProfile)
1941         Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1942             << "-fdiagnostics-hotness-threshold=";
1943     }
1944   }
1945 
1946   if (auto *arg =
1947           Args.getLastArg(options::OPT_fdiagnostics_misexpect_tolerance_EQ)) {
1948     auto ResultOrErr = parseToleranceOption(arg->getValue());
1949 
1950     if (!ResultOrErr) {
1951       Diags.Report(diag::err_drv_invalid_diagnotics_misexpect_tolerance)
1952           << "-fdiagnostics-misexpect-tolerance=";
1953     } else {
1954       Opts.DiagnosticsMisExpectTolerance = *ResultOrErr;
1955       if ((!Opts.DiagnosticsMisExpectTolerance.hasValue() ||
1956            Opts.DiagnosticsMisExpectTolerance.getValue() > 0) &&
1957           !UsingProfile)
1958         Diags.Report(diag::warn_drv_diagnostics_misexpect_requires_pgo)
1959             << "-fdiagnostics-misexpect-tolerance=";
1960     }
1961   }
1962 
1963   // If the user requested to use a sample profile for PGO, then the
1964   // backend will need to track source location information so the profile
1965   // can be incorporated into the IR.
1966   if (UsingSampleProfile)
1967     NeedLocTracking = true;
1968 
1969   if (!Opts.StackUsageOutput.empty())
1970     NeedLocTracking = true;
1971 
1972   // If the user requested a flag that requires source locations available in
1973   // the backend, make sure that the backend tracks source location information.
1974   if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
1975     Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
1976 
1977   // Parse -fsanitize-recover= arguments.
1978   // FIXME: Report unrecoverable sanitizers incorrectly specified here.
1979   parseSanitizerKinds("-fsanitize-recover=",
1980                       Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
1981                       Opts.SanitizeRecover);
1982   parseSanitizerKinds("-fsanitize-trap=",
1983                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
1984                       Opts.SanitizeTrap);
1985 
1986   Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
1987 
1988   if (Args.hasArg(options::OPT_ffinite_loops))
1989     Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Always;
1990   else if (Args.hasArg(options::OPT_fno_finite_loops))
1991     Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Never;
1992 
1993   Opts.EmitIEEENaNCompliantInsts = Args.hasFlag(
1994       options::OPT_mamdgpu_ieee, options::OPT_mno_amdgpu_ieee, true);
1995   if (!Opts.EmitIEEENaNCompliantInsts && !LangOptsRef.NoHonorNaNs)
1996     Diags.Report(diag::err_drv_amdgpu_ieee_without_no_honor_nans);
1997 
1998   return Diags.getNumErrors() == NumErrorsBefore;
1999 }
2000 
2001 static void
2002 GenerateDependencyOutputArgs(const DependencyOutputOptions &Opts,
2003                              SmallVectorImpl<const char *> &Args,
2004                              CompilerInvocation::StringAllocator SA) {
2005   const DependencyOutputOptions &DependencyOutputOpts = Opts;
2006 #define DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING(                             \
2007     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2008     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2009     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2010     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2011   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2012       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2013       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2014 #include "clang/Driver/Options.inc"
2015 #undef DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING
2016 
2017   if (Opts.ShowIncludesDest != ShowIncludesDestination::None)
2018     GenerateArg(Args, OPT_show_includes, SA);
2019 
2020   for (const auto &Dep : Opts.ExtraDeps) {
2021     switch (Dep.second) {
2022     case EDK_SanitizeIgnorelist:
2023       // Sanitizer ignorelist arguments are generated from LanguageOptions.
2024       continue;
2025     case EDK_ModuleFile:
2026       // Module file arguments are generated from FrontendOptions and
2027       // HeaderSearchOptions.
2028       continue;
2029     case EDK_ProfileList:
2030       // Profile list arguments are generated from LanguageOptions via the
2031       // marshalling infrastructure.
2032       continue;
2033     case EDK_DepFileEntry:
2034       GenerateArg(Args, OPT_fdepfile_entry, Dep.first, SA);
2035       break;
2036     }
2037   }
2038 }
2039 
2040 static bool ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
2041                                       ArgList &Args, DiagnosticsEngine &Diags,
2042                                       frontend::ActionKind Action,
2043                                       bool ShowLineMarkers) {
2044   unsigned NumErrorsBefore = Diags.getNumErrors();
2045 
2046   DependencyOutputOptions &DependencyOutputOpts = Opts;
2047 #define DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING(                             \
2048     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2049     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2050     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2051     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2052   PARSE_OPTION_WITH_MARSHALLING(                                               \
2053       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2054       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2055 #include "clang/Driver/Options.inc"
2056 #undef DEPENDENCY_OUTPUT_OPTION_WITH_MARSHALLING
2057 
2058   if (Args.hasArg(OPT_show_includes)) {
2059     // Writing both /showIncludes and preprocessor output to stdout
2060     // would produce interleaved output, so use stderr for /showIncludes.
2061     // This behaves the same as cl.exe, when /E, /EP or /P are passed.
2062     if (Action == frontend::PrintPreprocessedInput || !ShowLineMarkers)
2063       Opts.ShowIncludesDest = ShowIncludesDestination::Stderr;
2064     else
2065       Opts.ShowIncludesDest = ShowIncludesDestination::Stdout;
2066   } else {
2067     Opts.ShowIncludesDest = ShowIncludesDestination::None;
2068   }
2069 
2070   // Add sanitizer ignorelists as extra dependencies.
2071   // They won't be discovered by the regular preprocessor, so
2072   // we let make / ninja to know about this implicit dependency.
2073   if (!Args.hasArg(OPT_fno_sanitize_ignorelist)) {
2074     for (const auto *A : Args.filtered(OPT_fsanitize_ignorelist_EQ)) {
2075       StringRef Val = A->getValue();
2076       if (!Val.contains('='))
2077         Opts.ExtraDeps.emplace_back(std::string(Val), EDK_SanitizeIgnorelist);
2078     }
2079     if (Opts.IncludeSystemHeaders) {
2080       for (const auto *A : Args.filtered(OPT_fsanitize_system_ignorelist_EQ)) {
2081         StringRef Val = A->getValue();
2082         if (!Val.contains('='))
2083           Opts.ExtraDeps.emplace_back(std::string(Val), EDK_SanitizeIgnorelist);
2084       }
2085     }
2086   }
2087 
2088   // -fprofile-list= dependencies.
2089   for (const auto &Filename : Args.getAllArgValues(OPT_fprofile_list_EQ))
2090     Opts.ExtraDeps.emplace_back(Filename, EDK_ProfileList);
2091 
2092   // Propagate the extra dependencies.
2093   for (const auto *A : Args.filtered(OPT_fdepfile_entry))
2094     Opts.ExtraDeps.emplace_back(A->getValue(), EDK_DepFileEntry);
2095 
2096   // Only the -fmodule-file=<file> form.
2097   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2098     StringRef Val = A->getValue();
2099     if (!Val.contains('='))
2100       Opts.ExtraDeps.emplace_back(std::string(Val), EDK_ModuleFile);
2101   }
2102 
2103   return Diags.getNumErrors() == NumErrorsBefore;
2104 }
2105 
2106 static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
2107   // Color diagnostics default to auto ("on" if terminal supports) in the driver
2108   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
2109   // Support both clang's -f[no-]color-diagnostics and gcc's
2110   // -f[no-]diagnostics-colors[=never|always|auto].
2111   enum {
2112     Colors_On,
2113     Colors_Off,
2114     Colors_Auto
2115   } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
2116   for (auto *A : Args) {
2117     const Option &O = A->getOption();
2118     if (O.matches(options::OPT_fcolor_diagnostics)) {
2119       ShowColors = Colors_On;
2120     } else if (O.matches(options::OPT_fno_color_diagnostics)) {
2121       ShowColors = Colors_Off;
2122     } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
2123       StringRef Value(A->getValue());
2124       if (Value == "always")
2125         ShowColors = Colors_On;
2126       else if (Value == "never")
2127         ShowColors = Colors_Off;
2128       else if (Value == "auto")
2129         ShowColors = Colors_Auto;
2130     }
2131   }
2132   return ShowColors == Colors_On ||
2133          (ShowColors == Colors_Auto &&
2134           llvm::sys::Process::StandardErrHasColors());
2135 }
2136 
2137 static bool checkVerifyPrefixes(const std::vector<std::string> &VerifyPrefixes,
2138                                 DiagnosticsEngine &Diags) {
2139   bool Success = true;
2140   for (const auto &Prefix : VerifyPrefixes) {
2141     // Every prefix must start with a letter and contain only alphanumeric
2142     // characters, hyphens, and underscores.
2143     auto BadChar = llvm::find_if(Prefix, [](char C) {
2144       return !isAlphanumeric(C) && C != '-' && C != '_';
2145     });
2146     if (BadChar != Prefix.end() || !isLetter(Prefix[0])) {
2147       Success = false;
2148       Diags.Report(diag::err_drv_invalid_value) << "-verify=" << Prefix;
2149       Diags.Report(diag::note_drv_verify_prefix_spelling);
2150     }
2151   }
2152   return Success;
2153 }
2154 
2155 static void GenerateFileSystemArgs(const FileSystemOptions &Opts,
2156                                    SmallVectorImpl<const char *> &Args,
2157                                    CompilerInvocation::StringAllocator SA) {
2158   const FileSystemOptions &FileSystemOpts = Opts;
2159 
2160 #define FILE_SYSTEM_OPTION_WITH_MARSHALLING(                                   \
2161     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2162     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2163     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2164     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2165   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2166       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2167       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2168 #include "clang/Driver/Options.inc"
2169 #undef FILE_SYSTEM_OPTION_WITH_MARSHALLING
2170 }
2171 
2172 static bool ParseFileSystemArgs(FileSystemOptions &Opts, const ArgList &Args,
2173                                 DiagnosticsEngine &Diags) {
2174   unsigned NumErrorsBefore = Diags.getNumErrors();
2175 
2176   FileSystemOptions &FileSystemOpts = Opts;
2177 
2178 #define FILE_SYSTEM_OPTION_WITH_MARSHALLING(                                   \
2179     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2180     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2181     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2182     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2183   PARSE_OPTION_WITH_MARSHALLING(                                               \
2184       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2185       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2186 #include "clang/Driver/Options.inc"
2187 #undef FILE_SYSTEM_OPTION_WITH_MARSHALLING
2188 
2189   return Diags.getNumErrors() == NumErrorsBefore;
2190 }
2191 
2192 static void GenerateMigratorArgs(const MigratorOptions &Opts,
2193                                  SmallVectorImpl<const char *> &Args,
2194                                  CompilerInvocation::StringAllocator SA) {
2195   const MigratorOptions &MigratorOpts = Opts;
2196 #define MIGRATOR_OPTION_WITH_MARSHALLING(                                      \
2197     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2198     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2199     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2200     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2201   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2202       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2203       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2204 #include "clang/Driver/Options.inc"
2205 #undef MIGRATOR_OPTION_WITH_MARSHALLING
2206 }
2207 
2208 static bool ParseMigratorArgs(MigratorOptions &Opts, const ArgList &Args,
2209                               DiagnosticsEngine &Diags) {
2210   unsigned NumErrorsBefore = Diags.getNumErrors();
2211 
2212   MigratorOptions &MigratorOpts = Opts;
2213 
2214 #define MIGRATOR_OPTION_WITH_MARSHALLING(                                      \
2215     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2216     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2217     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2218     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2219   PARSE_OPTION_WITH_MARSHALLING(                                               \
2220       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2221       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2222 #include "clang/Driver/Options.inc"
2223 #undef MIGRATOR_OPTION_WITH_MARSHALLING
2224 
2225   return Diags.getNumErrors() == NumErrorsBefore;
2226 }
2227 
2228 void CompilerInvocation::GenerateDiagnosticArgs(
2229     const DiagnosticOptions &Opts, SmallVectorImpl<const char *> &Args,
2230     StringAllocator SA, bool DefaultDiagColor) {
2231   const DiagnosticOptions *DiagnosticOpts = &Opts;
2232 #define DIAG_OPTION_WITH_MARSHALLING(                                          \
2233     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2234     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2235     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2236     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2237   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2238       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2239       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2240 #include "clang/Driver/Options.inc"
2241 #undef DIAG_OPTION_WITH_MARSHALLING
2242 
2243   if (!Opts.DiagnosticSerializationFile.empty())
2244     GenerateArg(Args, OPT_diagnostic_serialized_file,
2245                 Opts.DiagnosticSerializationFile, SA);
2246 
2247   if (Opts.ShowColors)
2248     GenerateArg(Args, OPT_fcolor_diagnostics, SA);
2249 
2250   if (Opts.VerifyDiagnostics &&
2251       llvm::is_contained(Opts.VerifyPrefixes, "expected"))
2252     GenerateArg(Args, OPT_verify, SA);
2253 
2254   for (const auto &Prefix : Opts.VerifyPrefixes)
2255     if (Prefix != "expected")
2256       GenerateArg(Args, OPT_verify_EQ, Prefix, SA);
2257 
2258   DiagnosticLevelMask VIU = Opts.getVerifyIgnoreUnexpected();
2259   if (VIU == DiagnosticLevelMask::None) {
2260     // This is the default, don't generate anything.
2261   } else if (VIU == DiagnosticLevelMask::All) {
2262     GenerateArg(Args, OPT_verify_ignore_unexpected, SA);
2263   } else {
2264     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Note) != 0)
2265       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "note", SA);
2266     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Remark) != 0)
2267       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "remark", SA);
2268     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Warning) != 0)
2269       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "warning", SA);
2270     if (static_cast<unsigned>(VIU & DiagnosticLevelMask::Error) != 0)
2271       GenerateArg(Args, OPT_verify_ignore_unexpected_EQ, "error", SA);
2272   }
2273 
2274   for (const auto &Warning : Opts.Warnings) {
2275     // This option is automatically generated from UndefPrefixes.
2276     if (Warning == "undef-prefix")
2277       continue;
2278     Args.push_back(SA(StringRef("-W") + Warning));
2279   }
2280 
2281   for (const auto &Remark : Opts.Remarks) {
2282     // These arguments are generated from OptimizationRemark fields of
2283     // CodeGenOptions.
2284     StringRef IgnoredRemarks[] = {"pass",          "no-pass",
2285                                   "pass-analysis", "no-pass-analysis",
2286                                   "pass-missed",   "no-pass-missed"};
2287     if (llvm::is_contained(IgnoredRemarks, Remark))
2288       continue;
2289 
2290     Args.push_back(SA(StringRef("-R") + Remark));
2291   }
2292 }
2293 
2294 std::unique_ptr<DiagnosticOptions>
2295 clang::CreateAndPopulateDiagOpts(ArrayRef<const char *> Argv) {
2296   auto DiagOpts = std::make_unique<DiagnosticOptions>();
2297   unsigned MissingArgIndex, MissingArgCount;
2298   InputArgList Args = getDriverOptTable().ParseArgs(
2299       Argv.slice(1), MissingArgIndex, MissingArgCount);
2300   // We ignore MissingArgCount and the return value of ParseDiagnosticArgs.
2301   // Any errors that would be diagnosed here will also be diagnosed later,
2302   // when the DiagnosticsEngine actually exists.
2303   (void)ParseDiagnosticArgs(*DiagOpts, Args);
2304   return DiagOpts;
2305 }
2306 
2307 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
2308                                 DiagnosticsEngine *Diags,
2309                                 bool DefaultDiagColor) {
2310   Optional<DiagnosticsEngine> IgnoringDiags;
2311   if (!Diags) {
2312     IgnoringDiags.emplace(new DiagnosticIDs(), new DiagnosticOptions(),
2313                           new IgnoringDiagConsumer());
2314     Diags = &*IgnoringDiags;
2315   }
2316 
2317   unsigned NumErrorsBefore = Diags->getNumErrors();
2318 
2319   // The key paths of diagnostic options defined in Options.td start with
2320   // "DiagnosticOpts->". Let's provide the expected variable name and type.
2321   DiagnosticOptions *DiagnosticOpts = &Opts;
2322 
2323 #define DIAG_OPTION_WITH_MARSHALLING(                                          \
2324     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2325     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2326     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2327     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2328   PARSE_OPTION_WITH_MARSHALLING(                                               \
2329       Args, *Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,    \
2330       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2331 #include "clang/Driver/Options.inc"
2332 #undef DIAG_OPTION_WITH_MARSHALLING
2333 
2334   llvm::sys::Process::UseANSIEscapeCodes(Opts.UseANSIEscapeCodes);
2335 
2336   if (Arg *A =
2337           Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
2338     Opts.DiagnosticSerializationFile = A->getValue();
2339   Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
2340 
2341   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify) || Args.hasArg(OPT_verify_EQ);
2342   Opts.VerifyPrefixes = Args.getAllArgValues(OPT_verify_EQ);
2343   if (Args.hasArg(OPT_verify))
2344     Opts.VerifyPrefixes.push_back("expected");
2345   // Keep VerifyPrefixes in its original order for the sake of diagnostics, and
2346   // then sort it to prepare for fast lookup using std::binary_search.
2347   if (!checkVerifyPrefixes(Opts.VerifyPrefixes, *Diags))
2348     Opts.VerifyDiagnostics = false;
2349   else
2350     llvm::sort(Opts.VerifyPrefixes);
2351   DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
2352   parseDiagnosticLevelMask(
2353       "-verify-ignore-unexpected=",
2354       Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ), *Diags, DiagMask);
2355   if (Args.hasArg(OPT_verify_ignore_unexpected))
2356     DiagMask = DiagnosticLevelMask::All;
2357   Opts.setVerifyIgnoreUnexpected(DiagMask);
2358   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
2359     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
2360     Diags->Report(diag::warn_ignoring_ftabstop_value)
2361         << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
2362   }
2363 
2364   addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
2365   addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
2366 
2367   return Diags->getNumErrors() == NumErrorsBefore;
2368 }
2369 
2370 /// Parse the argument to the -ftest-module-file-extension
2371 /// command-line argument.
2372 ///
2373 /// \returns true on error, false on success.
2374 static bool parseTestModuleFileExtensionArg(StringRef Arg,
2375                                             std::string &BlockName,
2376                                             unsigned &MajorVersion,
2377                                             unsigned &MinorVersion,
2378                                             bool &Hashed,
2379                                             std::string &UserInfo) {
2380   SmallVector<StringRef, 5> Args;
2381   Arg.split(Args, ':', 5);
2382   if (Args.size() < 5)
2383     return true;
2384 
2385   BlockName = std::string(Args[0]);
2386   if (Args[1].getAsInteger(10, MajorVersion)) return true;
2387   if (Args[2].getAsInteger(10, MinorVersion)) return true;
2388   if (Args[3].getAsInteger(2, Hashed)) return true;
2389   if (Args.size() > 4)
2390     UserInfo = std::string(Args[4]);
2391   return false;
2392 }
2393 
2394 /// Return a table that associates command line option specifiers with the
2395 /// frontend action. Note: The pair {frontend::PluginAction, OPT_plugin} is
2396 /// intentionally missing, as this case is handled separately from other
2397 /// frontend options.
2398 static const auto &getFrontendActionTable() {
2399   static const std::pair<frontend::ActionKind, unsigned> Table[] = {
2400       {frontend::ASTDeclList, OPT_ast_list},
2401 
2402       {frontend::ASTDump, OPT_ast_dump_all_EQ},
2403       {frontend::ASTDump, OPT_ast_dump_all},
2404       {frontend::ASTDump, OPT_ast_dump_EQ},
2405       {frontend::ASTDump, OPT_ast_dump},
2406       {frontend::ASTDump, OPT_ast_dump_lookups},
2407       {frontend::ASTDump, OPT_ast_dump_decl_types},
2408 
2409       {frontend::ASTPrint, OPT_ast_print},
2410       {frontend::ASTView, OPT_ast_view},
2411       {frontend::DumpCompilerOptions, OPT_compiler_options_dump},
2412       {frontend::DumpRawTokens, OPT_dump_raw_tokens},
2413       {frontend::DumpTokens, OPT_dump_tokens},
2414       {frontend::EmitAssembly, OPT_S},
2415       {frontend::EmitBC, OPT_emit_llvm_bc},
2416       {frontend::EmitHTML, OPT_emit_html},
2417       {frontend::EmitLLVM, OPT_emit_llvm},
2418       {frontend::EmitLLVMOnly, OPT_emit_llvm_only},
2419       {frontend::EmitCodeGenOnly, OPT_emit_codegen_only},
2420       {frontend::EmitObj, OPT_emit_obj},
2421       {frontend::ExtractAPI, OPT_extract_api},
2422 
2423       {frontend::FixIt, OPT_fixit_EQ},
2424       {frontend::FixIt, OPT_fixit},
2425 
2426       {frontend::GenerateModule, OPT_emit_module},
2427       {frontend::GenerateModuleInterface, OPT_emit_module_interface},
2428       {frontend::GenerateHeaderModule, OPT_emit_header_module},
2429       {frontend::GenerateHeaderUnit, OPT_emit_header_unit},
2430       {frontend::GeneratePCH, OPT_emit_pch},
2431       {frontend::GenerateInterfaceStubs, OPT_emit_interface_stubs},
2432       {frontend::InitOnly, OPT_init_only},
2433       {frontend::ParseSyntaxOnly, OPT_fsyntax_only},
2434       {frontend::ModuleFileInfo, OPT_module_file_info},
2435       {frontend::VerifyPCH, OPT_verify_pch},
2436       {frontend::PrintPreamble, OPT_print_preamble},
2437       {frontend::PrintPreprocessedInput, OPT_E},
2438       {frontend::TemplightDump, OPT_templight_dump},
2439       {frontend::RewriteMacros, OPT_rewrite_macros},
2440       {frontend::RewriteObjC, OPT_rewrite_objc},
2441       {frontend::RewriteTest, OPT_rewrite_test},
2442       {frontend::RunAnalysis, OPT_analyze},
2443       {frontend::MigrateSource, OPT_migrate},
2444       {frontend::RunPreprocessorOnly, OPT_Eonly},
2445       {frontend::PrintDependencyDirectivesSourceMinimizerOutput,
2446        OPT_print_dependency_directives_minimized_source},
2447   };
2448 
2449   return Table;
2450 }
2451 
2452 /// Maps command line option to frontend action.
2453 static Optional<frontend::ActionKind> getFrontendAction(OptSpecifier &Opt) {
2454   for (const auto &ActionOpt : getFrontendActionTable())
2455     if (ActionOpt.second == Opt.getID())
2456       return ActionOpt.first;
2457 
2458   return None;
2459 }
2460 
2461 /// Maps frontend action to command line option.
2462 static Optional<OptSpecifier>
2463 getProgramActionOpt(frontend::ActionKind ProgramAction) {
2464   for (const auto &ActionOpt : getFrontendActionTable())
2465     if (ActionOpt.first == ProgramAction)
2466       return OptSpecifier(ActionOpt.second);
2467 
2468   return None;
2469 }
2470 
2471 static void GenerateFrontendArgs(const FrontendOptions &Opts,
2472                                  SmallVectorImpl<const char *> &Args,
2473                                  CompilerInvocation::StringAllocator SA,
2474                                  bool IsHeader) {
2475   const FrontendOptions &FrontendOpts = Opts;
2476 #define FRONTEND_OPTION_WITH_MARSHALLING(                                      \
2477     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2478     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2479     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2480     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2481   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2482       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2483       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2484 #include "clang/Driver/Options.inc"
2485 #undef FRONTEND_OPTION_WITH_MARSHALLING
2486 
2487   Optional<OptSpecifier> ProgramActionOpt =
2488       getProgramActionOpt(Opts.ProgramAction);
2489 
2490   // Generating a simple flag covers most frontend actions.
2491   std::function<void()> GenerateProgramAction = [&]() {
2492     GenerateArg(Args, *ProgramActionOpt, SA);
2493   };
2494 
2495   if (!ProgramActionOpt) {
2496     // PluginAction is the only program action handled separately.
2497     assert(Opts.ProgramAction == frontend::PluginAction &&
2498            "Frontend action without option.");
2499     GenerateProgramAction = [&]() {
2500       GenerateArg(Args, OPT_plugin, Opts.ActionName, SA);
2501     };
2502   }
2503 
2504   // FIXME: Simplify the complex 'AST dump' command line.
2505   if (Opts.ProgramAction == frontend::ASTDump) {
2506     GenerateProgramAction = [&]() {
2507       // ASTDumpLookups, ASTDumpDeclTypes and ASTDumpFilter are generated via
2508       // marshalling infrastructure.
2509 
2510       if (Opts.ASTDumpFormat != ADOF_Default) {
2511         StringRef Format;
2512         switch (Opts.ASTDumpFormat) {
2513         case ADOF_Default:
2514           llvm_unreachable("Default AST dump format.");
2515         case ADOF_JSON:
2516           Format = "json";
2517           break;
2518         }
2519 
2520         if (Opts.ASTDumpAll)
2521           GenerateArg(Args, OPT_ast_dump_all_EQ, Format, SA);
2522         if (Opts.ASTDumpDecls)
2523           GenerateArg(Args, OPT_ast_dump_EQ, Format, SA);
2524       } else {
2525         if (Opts.ASTDumpAll)
2526           GenerateArg(Args, OPT_ast_dump_all, SA);
2527         if (Opts.ASTDumpDecls)
2528           GenerateArg(Args, OPT_ast_dump, SA);
2529       }
2530     };
2531   }
2532 
2533   if (Opts.ProgramAction == frontend::FixIt && !Opts.FixItSuffix.empty()) {
2534     GenerateProgramAction = [&]() {
2535       GenerateArg(Args, OPT_fixit_EQ, Opts.FixItSuffix, SA);
2536     };
2537   }
2538 
2539   GenerateProgramAction();
2540 
2541   for (const auto &PluginArgs : Opts.PluginArgs) {
2542     Option Opt = getDriverOptTable().getOption(OPT_plugin_arg);
2543     const char *Spelling =
2544         SA(Opt.getPrefix() + Opt.getName() + PluginArgs.first);
2545     for (const auto &PluginArg : PluginArgs.second)
2546       denormalizeString(Args, Spelling, SA, Opt.getKind(), 0, PluginArg);
2547   }
2548 
2549   for (const auto &Ext : Opts.ModuleFileExtensions)
2550     if (auto *TestExt = dyn_cast_or_null<TestModuleFileExtension>(Ext.get()))
2551       GenerateArg(Args, OPT_ftest_module_file_extension_EQ, TestExt->str(), SA);
2552 
2553   if (!Opts.CodeCompletionAt.FileName.empty())
2554     GenerateArg(Args, OPT_code_completion_at, Opts.CodeCompletionAt.ToString(),
2555                 SA);
2556 
2557   for (const auto &Plugin : Opts.Plugins)
2558     GenerateArg(Args, OPT_load, Plugin, SA);
2559 
2560   // ASTDumpDecls and ASTDumpAll already handled with ProgramAction.
2561 
2562   for (const auto &ModuleFile : Opts.ModuleFiles)
2563     GenerateArg(Args, OPT_fmodule_file, ModuleFile, SA);
2564 
2565   if (Opts.AuxTargetCPU.hasValue())
2566     GenerateArg(Args, OPT_aux_target_cpu, *Opts.AuxTargetCPU, SA);
2567 
2568   if (Opts.AuxTargetFeatures.hasValue())
2569     for (const auto &Feature : *Opts.AuxTargetFeatures)
2570       GenerateArg(Args, OPT_aux_target_feature, Feature, SA);
2571 
2572   {
2573     StringRef Preprocessed = Opts.DashX.isPreprocessed() ? "-cpp-output" : "";
2574     StringRef ModuleMap =
2575         Opts.DashX.getFormat() == InputKind::ModuleMap ? "-module-map" : "";
2576     StringRef HeaderUnit = "";
2577     switch (Opts.DashX.getHeaderUnitKind()) {
2578     case InputKind::HeaderUnit_None:
2579       break;
2580     case InputKind::HeaderUnit_User:
2581       HeaderUnit = "-user";
2582       break;
2583     case InputKind::HeaderUnit_System:
2584       HeaderUnit = "-system";
2585       break;
2586     case InputKind::HeaderUnit_Abs:
2587       HeaderUnit = "-header-unit";
2588       break;
2589     }
2590     StringRef Header = IsHeader ? "-header" : "";
2591 
2592     StringRef Lang;
2593     switch (Opts.DashX.getLanguage()) {
2594     case Language::C:
2595       Lang = "c";
2596       break;
2597     case Language::OpenCL:
2598       Lang = "cl";
2599       break;
2600     case Language::OpenCLCXX:
2601       Lang = "clcpp";
2602       break;
2603     case Language::CUDA:
2604       Lang = "cuda";
2605       break;
2606     case Language::HIP:
2607       Lang = "hip";
2608       break;
2609     case Language::CXX:
2610       Lang = "c++";
2611       break;
2612     case Language::ObjC:
2613       Lang = "objective-c";
2614       break;
2615     case Language::ObjCXX:
2616       Lang = "objective-c++";
2617       break;
2618     case Language::RenderScript:
2619       Lang = "renderscript";
2620       break;
2621     case Language::Asm:
2622       Lang = "assembler-with-cpp";
2623       break;
2624     case Language::Unknown:
2625       assert(Opts.DashX.getFormat() == InputKind::Precompiled &&
2626              "Generating -x argument for unknown language (not precompiled).");
2627       Lang = "ast";
2628       break;
2629     case Language::LLVM_IR:
2630       Lang = "ir";
2631       break;
2632     case Language::HLSL:
2633       Lang = "hlsl";
2634       break;
2635     }
2636 
2637     GenerateArg(Args, OPT_x,
2638                 Lang + HeaderUnit + Header + ModuleMap + Preprocessed, SA);
2639   }
2640 
2641   // OPT_INPUT has a unique class, generate it directly.
2642   for (const auto &Input : Opts.Inputs)
2643     Args.push_back(SA(Input.getFile()));
2644 }
2645 
2646 static bool ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
2647                               DiagnosticsEngine &Diags, bool &IsHeaderFile) {
2648   unsigned NumErrorsBefore = Diags.getNumErrors();
2649 
2650   FrontendOptions &FrontendOpts = Opts;
2651 
2652 #define FRONTEND_OPTION_WITH_MARSHALLING(                                      \
2653     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2654     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2655     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2656     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2657   PARSE_OPTION_WITH_MARSHALLING(                                               \
2658       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
2659       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
2660 #include "clang/Driver/Options.inc"
2661 #undef FRONTEND_OPTION_WITH_MARSHALLING
2662 
2663   Opts.ProgramAction = frontend::ParseSyntaxOnly;
2664   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
2665     OptSpecifier Opt = OptSpecifier(A->getOption().getID());
2666     Optional<frontend::ActionKind> ProgramAction = getFrontendAction(Opt);
2667     assert(ProgramAction && "Option specifier not in Action_Group.");
2668 
2669     if (ProgramAction == frontend::ASTDump &&
2670         (Opt == OPT_ast_dump_all_EQ || Opt == OPT_ast_dump_EQ)) {
2671       unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
2672                          .CaseLower("default", ADOF_Default)
2673                          .CaseLower("json", ADOF_JSON)
2674                          .Default(std::numeric_limits<unsigned>::max());
2675 
2676       if (Val != std::numeric_limits<unsigned>::max())
2677         Opts.ASTDumpFormat = static_cast<ASTDumpOutputFormat>(Val);
2678       else {
2679         Diags.Report(diag::err_drv_invalid_value)
2680             << A->getAsString(Args) << A->getValue();
2681         Opts.ASTDumpFormat = ADOF_Default;
2682       }
2683     }
2684 
2685     if (ProgramAction == frontend::FixIt && Opt == OPT_fixit_EQ)
2686       Opts.FixItSuffix = A->getValue();
2687 
2688     if (ProgramAction == frontend::GenerateInterfaceStubs) {
2689       StringRef ArgStr =
2690           Args.hasArg(OPT_interface_stub_version_EQ)
2691               ? Args.getLastArgValue(OPT_interface_stub_version_EQ)
2692               : "ifs-v1";
2693       if (ArgStr == "experimental-yaml-elf-v1" ||
2694           ArgStr == "experimental-ifs-v1" || ArgStr == "experimental-ifs-v2" ||
2695           ArgStr == "experimental-tapi-elf-v1") {
2696         std::string ErrorMessage =
2697             "Invalid interface stub format: " + ArgStr.str() +
2698             " is deprecated.";
2699         Diags.Report(diag::err_drv_invalid_value)
2700             << "Must specify a valid interface stub format type, ie: "
2701                "-interface-stub-version=ifs-v1"
2702             << ErrorMessage;
2703         ProgramAction = frontend::ParseSyntaxOnly;
2704       } else if (!ArgStr.startswith("ifs-")) {
2705         std::string ErrorMessage =
2706             "Invalid interface stub format: " + ArgStr.str() + ".";
2707         Diags.Report(diag::err_drv_invalid_value)
2708             << "Must specify a valid interface stub format type, ie: "
2709                "-interface-stub-version=ifs-v1"
2710             << ErrorMessage;
2711         ProgramAction = frontend::ParseSyntaxOnly;
2712       }
2713     }
2714 
2715     Opts.ProgramAction = *ProgramAction;
2716   }
2717 
2718   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
2719     Opts.Plugins.emplace_back(A->getValue(0));
2720     Opts.ProgramAction = frontend::PluginAction;
2721     Opts.ActionName = A->getValue();
2722   }
2723   for (const auto *AA : Args.filtered(OPT_plugin_arg))
2724     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
2725 
2726   for (const std::string &Arg :
2727          Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
2728     std::string BlockName;
2729     unsigned MajorVersion;
2730     unsigned MinorVersion;
2731     bool Hashed;
2732     std::string UserInfo;
2733     if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
2734                                         MinorVersion, Hashed, UserInfo)) {
2735       Diags.Report(diag::err_test_module_file_extension_format) << Arg;
2736 
2737       continue;
2738     }
2739 
2740     // Add the testing module file extension.
2741     Opts.ModuleFileExtensions.push_back(
2742         std::make_shared<TestModuleFileExtension>(
2743             BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
2744   }
2745 
2746   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
2747     Opts.CodeCompletionAt =
2748       ParsedSourceLocation::FromString(A->getValue());
2749     if (Opts.CodeCompletionAt.FileName.empty())
2750       Diags.Report(diag::err_drv_invalid_value)
2751         << A->getAsString(Args) << A->getValue();
2752   }
2753 
2754   Opts.Plugins = Args.getAllArgValues(OPT_load);
2755   Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump, OPT_ast_dump_EQ);
2756   Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all, OPT_ast_dump_all_EQ);
2757   // Only the -fmodule-file=<file> form.
2758   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
2759     StringRef Val = A->getValue();
2760     if (!Val.contains('='))
2761       Opts.ModuleFiles.push_back(std::string(Val));
2762   }
2763 
2764   if (Opts.ProgramAction != frontend::GenerateModule && Opts.IsSystemModule)
2765     Diags.Report(diag::err_drv_argument_only_allowed_with) << "-fsystem-module"
2766                                                            << "-emit-module";
2767 
2768   if (Args.hasArg(OPT_aux_target_cpu))
2769     Opts.AuxTargetCPU = std::string(Args.getLastArgValue(OPT_aux_target_cpu));
2770   if (Args.hasArg(OPT_aux_target_feature))
2771     Opts.AuxTargetFeatures = Args.getAllArgValues(OPT_aux_target_feature);
2772 
2773   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
2774       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
2775     Diags.Report(diag::err_drv_argument_not_allowed_with)
2776       << "ARC migration" << "ObjC migration";
2777   }
2778 
2779   InputKind DashX(Language::Unknown);
2780   if (const Arg *A = Args.getLastArg(OPT_x)) {
2781     StringRef XValue = A->getValue();
2782 
2783     // Parse suffixes:
2784     // '<lang>(-[{header-unit,user,system}-]header|[-module-map][-cpp-output])'.
2785     // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
2786     bool Preprocessed = XValue.consume_back("-cpp-output");
2787     bool ModuleMap = XValue.consume_back("-module-map");
2788     // Detect and consume the header indicator.
2789     bool IsHeader =
2790         XValue != "precompiled-header" && XValue.consume_back("-header");
2791 
2792     // If we have c++-{user,system}-header, that indicates a header unit input
2793     // likewise, if the user put -fmodule-header together with a header with an
2794     // absolute path (header-unit-header).
2795     InputKind::HeaderUnitKind HUK = InputKind::HeaderUnit_None;
2796     if (IsHeader || Preprocessed) {
2797       if (XValue.consume_back("-header-unit"))
2798         HUK = InputKind::HeaderUnit_Abs;
2799       else if (XValue.consume_back("-system"))
2800         HUK = InputKind::HeaderUnit_System;
2801       else if (XValue.consume_back("-user"))
2802         HUK = InputKind::HeaderUnit_User;
2803     }
2804 
2805     // The value set by this processing is an un-preprocessed source which is
2806     // not intended to be a module map or header unit.
2807     IsHeaderFile = IsHeader && !Preprocessed && !ModuleMap &&
2808                    HUK == InputKind::HeaderUnit_None;
2809 
2810     // Principal languages.
2811     DashX = llvm::StringSwitch<InputKind>(XValue)
2812                 .Case("c", Language::C)
2813                 .Case("cl", Language::OpenCL)
2814                 .Case("clcpp", Language::OpenCLCXX)
2815                 .Case("cuda", Language::CUDA)
2816                 .Case("hip", Language::HIP)
2817                 .Case("c++", Language::CXX)
2818                 .Case("objective-c", Language::ObjC)
2819                 .Case("objective-c++", Language::ObjCXX)
2820                 .Case("renderscript", Language::RenderScript)
2821                 .Case("hlsl", Language::HLSL)
2822                 .Default(Language::Unknown);
2823 
2824     // "objc[++]-cpp-output" is an acceptable synonym for
2825     // "objective-c[++]-cpp-output".
2826     if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap &&
2827         HUK == InputKind::HeaderUnit_None)
2828       DashX = llvm::StringSwitch<InputKind>(XValue)
2829                   .Case("objc", Language::ObjC)
2830                   .Case("objc++", Language::ObjCXX)
2831                   .Default(Language::Unknown);
2832 
2833     // Some special cases cannot be combined with suffixes.
2834     if (DashX.isUnknown() && !Preprocessed && !IsHeaderFile && !ModuleMap &&
2835         HUK == InputKind::HeaderUnit_None)
2836       DashX = llvm::StringSwitch<InputKind>(XValue)
2837                   .Case("cpp-output", InputKind(Language::C).getPreprocessed())
2838                   .Case("assembler-with-cpp", Language::Asm)
2839                   .Cases("ast", "pcm", "precompiled-header",
2840                          InputKind(Language::Unknown, InputKind::Precompiled))
2841                   .Case("ir", Language::LLVM_IR)
2842                   .Default(Language::Unknown);
2843 
2844     if (DashX.isUnknown())
2845       Diags.Report(diag::err_drv_invalid_value)
2846         << A->getAsString(Args) << A->getValue();
2847 
2848     if (Preprocessed)
2849       DashX = DashX.getPreprocessed();
2850     // A regular header is considered mutually exclusive with a header unit.
2851     if (HUK != InputKind::HeaderUnit_None) {
2852       DashX = DashX.withHeaderUnit(HUK);
2853       IsHeaderFile = true;
2854     } else if (IsHeaderFile)
2855       DashX = DashX.getHeader();
2856     if (ModuleMap)
2857       DashX = DashX.withFormat(InputKind::ModuleMap);
2858   }
2859 
2860   // '-' is the default input if none is given.
2861   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
2862   Opts.Inputs.clear();
2863   if (Inputs.empty())
2864     Inputs.push_back("-");
2865 
2866   if (DashX.getHeaderUnitKind() != InputKind::HeaderUnit_None &&
2867       Inputs.size() > 1)
2868     Diags.Report(diag::err_drv_header_unit_extra_inputs) << Inputs[1];
2869 
2870   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
2871     InputKind IK = DashX;
2872     if (IK.isUnknown()) {
2873       IK = FrontendOptions::getInputKindForExtension(
2874         StringRef(Inputs[i]).rsplit('.').second);
2875       // FIXME: Warn on this?
2876       if (IK.isUnknown())
2877         IK = Language::C;
2878       // FIXME: Remove this hack.
2879       if (i == 0)
2880         DashX = IK;
2881     }
2882 
2883     bool IsSystem = false;
2884 
2885     // The -emit-module action implicitly takes a module map.
2886     if (Opts.ProgramAction == frontend::GenerateModule &&
2887         IK.getFormat() == InputKind::Source) {
2888       IK = IK.withFormat(InputKind::ModuleMap);
2889       IsSystem = Opts.IsSystemModule;
2890     }
2891 
2892     Opts.Inputs.emplace_back(std::move(Inputs[i]), IK, IsSystem);
2893   }
2894 
2895   Opts.DashX = DashX;
2896 
2897   return Diags.getNumErrors() == NumErrorsBefore;
2898 }
2899 
2900 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
2901                                                  void *MainAddr) {
2902   std::string ClangExecutable =
2903       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
2904   return Driver::GetResourcesPath(ClangExecutable, CLANG_RESOURCE_DIR);
2905 }
2906 
2907 static void GenerateHeaderSearchArgs(HeaderSearchOptions &Opts,
2908                                      SmallVectorImpl<const char *> &Args,
2909                                      CompilerInvocation::StringAllocator SA) {
2910   const HeaderSearchOptions *HeaderSearchOpts = &Opts;
2911 #define HEADER_SEARCH_OPTION_WITH_MARSHALLING(                                 \
2912     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
2913     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
2914     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
2915     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
2916   GENERATE_OPTION_WITH_MARSHALLING(                                            \
2917       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
2918       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
2919 #include "clang/Driver/Options.inc"
2920 #undef HEADER_SEARCH_OPTION_WITH_MARSHALLING
2921 
2922   if (Opts.UseLibcxx)
2923     GenerateArg(Args, OPT_stdlib_EQ, "libc++", SA);
2924 
2925   if (!Opts.ModuleCachePath.empty())
2926     GenerateArg(Args, OPT_fmodules_cache_path, Opts.ModuleCachePath, SA);
2927 
2928   for (const auto &File : Opts.PrebuiltModuleFiles)
2929     GenerateArg(Args, OPT_fmodule_file, File.first + "=" + File.second, SA);
2930 
2931   for (const auto &Path : Opts.PrebuiltModulePaths)
2932     GenerateArg(Args, OPT_fprebuilt_module_path, Path, SA);
2933 
2934   for (const auto &Macro : Opts.ModulesIgnoreMacros)
2935     GenerateArg(Args, OPT_fmodules_ignore_macro, Macro.val(), SA);
2936 
2937   auto Matches = [](const HeaderSearchOptions::Entry &Entry,
2938                     llvm::ArrayRef<frontend::IncludeDirGroup> Groups,
2939                     llvm::Optional<bool> IsFramework,
2940                     llvm::Optional<bool> IgnoreSysRoot) {
2941     return llvm::is_contained(Groups, Entry.Group) &&
2942            (!IsFramework || (Entry.IsFramework == *IsFramework)) &&
2943            (!IgnoreSysRoot || (Entry.IgnoreSysRoot == *IgnoreSysRoot));
2944   };
2945 
2946   auto It = Opts.UserEntries.begin();
2947   auto End = Opts.UserEntries.end();
2948 
2949   // Add -I..., -F..., and -index-header-map options in order.
2950   for (; It < End &&
2951          Matches(*It, {frontend::IndexHeaderMap, frontend::Angled}, None, true);
2952        ++It) {
2953     OptSpecifier Opt = [It, Matches]() {
2954       if (Matches(*It, frontend::IndexHeaderMap, true, true))
2955         return OPT_F;
2956       if (Matches(*It, frontend::IndexHeaderMap, false, true))
2957         return OPT_I;
2958       if (Matches(*It, frontend::Angled, true, true))
2959         return OPT_F;
2960       if (Matches(*It, frontend::Angled, false, true))
2961         return OPT_I;
2962       llvm_unreachable("Unexpected HeaderSearchOptions::Entry.");
2963     }();
2964 
2965     if (It->Group == frontend::IndexHeaderMap)
2966       GenerateArg(Args, OPT_index_header_map, SA);
2967     GenerateArg(Args, Opt, It->Path, SA);
2968   };
2969 
2970   // Note: some paths that came from "[-iprefix=xx] -iwithprefixbefore=yy" may
2971   // have already been generated as "-I[xx]yy". If that's the case, their
2972   // position on command line was such that this has no semantic impact on
2973   // include paths.
2974   for (; It < End &&
2975          Matches(*It, {frontend::After, frontend::Angled}, false, true);
2976        ++It) {
2977     OptSpecifier Opt =
2978         It->Group == frontend::After ? OPT_iwithprefix : OPT_iwithprefixbefore;
2979     GenerateArg(Args, Opt, It->Path, SA);
2980   }
2981 
2982   // Note: Some paths that came from "-idirafter=xxyy" may have already been
2983   // generated as "-iwithprefix=xxyy". If that's the case, their position on
2984   // command line was such that this has no semantic impact on include paths.
2985   for (; It < End && Matches(*It, {frontend::After}, false, true); ++It)
2986     GenerateArg(Args, OPT_idirafter, It->Path, SA);
2987   for (; It < End && Matches(*It, {frontend::Quoted}, false, true); ++It)
2988     GenerateArg(Args, OPT_iquote, It->Path, SA);
2989   for (; It < End && Matches(*It, {frontend::System}, false, None); ++It)
2990     GenerateArg(Args, It->IgnoreSysRoot ? OPT_isystem : OPT_iwithsysroot,
2991                 It->Path, SA);
2992   for (; It < End && Matches(*It, {frontend::System}, true, true); ++It)
2993     GenerateArg(Args, OPT_iframework, It->Path, SA);
2994   for (; It < End && Matches(*It, {frontend::System}, true, false); ++It)
2995     GenerateArg(Args, OPT_iframeworkwithsysroot, It->Path, SA);
2996 
2997   // Add the paths for the various language specific isystem flags.
2998   for (; It < End && Matches(*It, {frontend::CSystem}, false, true); ++It)
2999     GenerateArg(Args, OPT_c_isystem, It->Path, SA);
3000   for (; It < End && Matches(*It, {frontend::CXXSystem}, false, true); ++It)
3001     GenerateArg(Args, OPT_cxx_isystem, It->Path, SA);
3002   for (; It < End && Matches(*It, {frontend::ObjCSystem}, false, true); ++It)
3003     GenerateArg(Args, OPT_objc_isystem, It->Path, SA);
3004   for (; It < End && Matches(*It, {frontend::ObjCXXSystem}, false, true); ++It)
3005     GenerateArg(Args, OPT_objcxx_isystem, It->Path, SA);
3006 
3007   // Add the internal paths from a driver that detects standard include paths.
3008   // Note: Some paths that came from "-internal-isystem" arguments may have
3009   // already been generated as "-isystem". If that's the case, their position on
3010   // command line was such that this has no semantic impact on include paths.
3011   for (; It < End &&
3012          Matches(*It, {frontend::System, frontend::ExternCSystem}, false, true);
3013        ++It) {
3014     OptSpecifier Opt = It->Group == frontend::System
3015                            ? OPT_internal_isystem
3016                            : OPT_internal_externc_isystem;
3017     GenerateArg(Args, Opt, It->Path, SA);
3018   }
3019 
3020   assert(It == End && "Unhandled HeaderSearchOption::Entry.");
3021 
3022   // Add the path prefixes which are implicitly treated as being system headers.
3023   for (const auto &P : Opts.SystemHeaderPrefixes) {
3024     OptSpecifier Opt = P.IsSystemHeader ? OPT_system_header_prefix
3025                                         : OPT_no_system_header_prefix;
3026     GenerateArg(Args, Opt, P.Prefix, SA);
3027   }
3028 
3029   for (const std::string &F : Opts.VFSOverlayFiles)
3030     GenerateArg(Args, OPT_ivfsoverlay, F, SA);
3031 }
3032 
3033 static bool ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
3034                                   DiagnosticsEngine &Diags,
3035                                   const std::string &WorkingDir) {
3036   unsigned NumErrorsBefore = Diags.getNumErrors();
3037 
3038   HeaderSearchOptions *HeaderSearchOpts = &Opts;
3039 
3040 #define HEADER_SEARCH_OPTION_WITH_MARSHALLING(                                 \
3041     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3042     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3043     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3044     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3045   PARSE_OPTION_WITH_MARSHALLING(                                               \
3046       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
3047       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
3048 #include "clang/Driver/Options.inc"
3049 #undef HEADER_SEARCH_OPTION_WITH_MARSHALLING
3050 
3051   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
3052     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
3053 
3054   // Canonicalize -fmodules-cache-path before storing it.
3055   SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
3056   if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
3057     if (WorkingDir.empty())
3058       llvm::sys::fs::make_absolute(P);
3059     else
3060       llvm::sys::fs::make_absolute(WorkingDir, P);
3061   }
3062   llvm::sys::path::remove_dots(P);
3063   Opts.ModuleCachePath = std::string(P.str());
3064 
3065   // Only the -fmodule-file=<name>=<file> form.
3066   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
3067     StringRef Val = A->getValue();
3068     if (Val.contains('=')) {
3069       auto Split = Val.split('=');
3070       Opts.PrebuiltModuleFiles.insert(
3071           {std::string(Split.first), std::string(Split.second)});
3072     }
3073   }
3074   for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
3075     Opts.AddPrebuiltModulePath(A->getValue());
3076 
3077   for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
3078     StringRef MacroDef = A->getValue();
3079     Opts.ModulesIgnoreMacros.insert(
3080         llvm::CachedHashString(MacroDef.split('=').first));
3081   }
3082 
3083   // Add -I..., -F..., and -index-header-map options in order.
3084   bool IsIndexHeaderMap = false;
3085   bool IsSysrootSpecified =
3086       Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
3087   for (const auto *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
3088     if (A->getOption().matches(OPT_index_header_map)) {
3089       // -index-header-map applies to the next -I or -F.
3090       IsIndexHeaderMap = true;
3091       continue;
3092     }
3093 
3094     frontend::IncludeDirGroup Group =
3095         IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
3096 
3097     bool IsFramework = A->getOption().matches(OPT_F);
3098     std::string Path = A->getValue();
3099 
3100     if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
3101       SmallString<32> Buffer;
3102       llvm::sys::path::append(Buffer, Opts.Sysroot,
3103                               llvm::StringRef(A->getValue()).substr(1));
3104       Path = std::string(Buffer.str());
3105     }
3106 
3107     Opts.AddPath(Path, Group, IsFramework,
3108                  /*IgnoreSysroot*/ true);
3109     IsIndexHeaderMap = false;
3110   }
3111 
3112   // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
3113   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
3114   for (const auto *A :
3115        Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
3116     if (A->getOption().matches(OPT_iprefix))
3117       Prefix = A->getValue();
3118     else if (A->getOption().matches(OPT_iwithprefix))
3119       Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
3120     else
3121       Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
3122   }
3123 
3124   for (const auto *A : Args.filtered(OPT_idirafter))
3125     Opts.AddPath(A->getValue(), frontend::After, false, true);
3126   for (const auto *A : Args.filtered(OPT_iquote))
3127     Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
3128   for (const auto *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
3129     Opts.AddPath(A->getValue(), frontend::System, false,
3130                  !A->getOption().matches(OPT_iwithsysroot));
3131   for (const auto *A : Args.filtered(OPT_iframework))
3132     Opts.AddPath(A->getValue(), frontend::System, true, true);
3133   for (const auto *A : Args.filtered(OPT_iframeworkwithsysroot))
3134     Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
3135                  /*IgnoreSysRoot=*/false);
3136 
3137   // Add the paths for the various language specific isystem flags.
3138   for (const auto *A : Args.filtered(OPT_c_isystem))
3139     Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
3140   for (const auto *A : Args.filtered(OPT_cxx_isystem))
3141     Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
3142   for (const auto *A : Args.filtered(OPT_objc_isystem))
3143     Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
3144   for (const auto *A : Args.filtered(OPT_objcxx_isystem))
3145     Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
3146 
3147   // Add the internal paths from a driver that detects standard include paths.
3148   for (const auto *A :
3149        Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
3150     frontend::IncludeDirGroup Group = frontend::System;
3151     if (A->getOption().matches(OPT_internal_externc_isystem))
3152       Group = frontend::ExternCSystem;
3153     Opts.AddPath(A->getValue(), Group, false, true);
3154   }
3155 
3156   // Add the path prefixes which are implicitly treated as being system headers.
3157   for (const auto *A :
3158        Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
3159     Opts.AddSystemHeaderPrefix(
3160         A->getValue(), A->getOption().matches(OPT_system_header_prefix));
3161 
3162   for (const auto *A : Args.filtered(OPT_ivfsoverlay))
3163     Opts.AddVFSOverlayFile(A->getValue());
3164 
3165   return Diags.getNumErrors() == NumErrorsBefore;
3166 }
3167 
3168 /// Check if input file kind and language standard are compatible.
3169 static bool IsInputCompatibleWithStandard(InputKind IK,
3170                                           const LangStandard &S) {
3171   switch (IK.getLanguage()) {
3172   case Language::Unknown:
3173   case Language::LLVM_IR:
3174     llvm_unreachable("should not parse language flags for this input");
3175 
3176   case Language::C:
3177   case Language::ObjC:
3178   case Language::RenderScript:
3179     return S.getLanguage() == Language::C;
3180 
3181   case Language::OpenCL:
3182     return S.getLanguage() == Language::OpenCL ||
3183            S.getLanguage() == Language::OpenCLCXX;
3184 
3185   case Language::OpenCLCXX:
3186     return S.getLanguage() == Language::OpenCLCXX;
3187 
3188   case Language::CXX:
3189   case Language::ObjCXX:
3190     return S.getLanguage() == Language::CXX;
3191 
3192   case Language::CUDA:
3193     // FIXME: What -std= values should be permitted for CUDA compilations?
3194     return S.getLanguage() == Language::CUDA ||
3195            S.getLanguage() == Language::CXX;
3196 
3197   case Language::HIP:
3198     return S.getLanguage() == Language::CXX || S.getLanguage() == Language::HIP;
3199 
3200   case Language::Asm:
3201     // Accept (and ignore) all -std= values.
3202     // FIXME: The -std= value is not ignored; it affects the tokenization
3203     // and preprocessing rules if we're preprocessing this asm input.
3204     return true;
3205 
3206   case Language::HLSL:
3207     return S.getLanguage() == Language::HLSL;
3208   }
3209 
3210   llvm_unreachable("unexpected input language");
3211 }
3212 
3213 /// Get language name for given input kind.
3214 static StringRef GetInputKindName(InputKind IK) {
3215   switch (IK.getLanguage()) {
3216   case Language::C:
3217     return "C";
3218   case Language::ObjC:
3219     return "Objective-C";
3220   case Language::CXX:
3221     return "C++";
3222   case Language::ObjCXX:
3223     return "Objective-C++";
3224   case Language::OpenCL:
3225     return "OpenCL";
3226   case Language::OpenCLCXX:
3227     return "C++ for OpenCL";
3228   case Language::CUDA:
3229     return "CUDA";
3230   case Language::RenderScript:
3231     return "RenderScript";
3232   case Language::HIP:
3233     return "HIP";
3234 
3235   case Language::Asm:
3236     return "Asm";
3237   case Language::LLVM_IR:
3238     return "LLVM IR";
3239 
3240   case Language::HLSL:
3241     return "HLSL";
3242 
3243   case Language::Unknown:
3244     break;
3245   }
3246   llvm_unreachable("unknown input language");
3247 }
3248 
3249 void CompilerInvocation::GenerateLangArgs(const LangOptions &Opts,
3250                                           SmallVectorImpl<const char *> &Args,
3251                                           StringAllocator SA,
3252                                           const llvm::Triple &T, InputKind IK) {
3253   if (IK.getFormat() == InputKind::Precompiled ||
3254       IK.getLanguage() == Language::LLVM_IR) {
3255     if (Opts.ObjCAutoRefCount)
3256       GenerateArg(Args, OPT_fobjc_arc, SA);
3257     if (Opts.PICLevel != 0)
3258       GenerateArg(Args, OPT_pic_level, Twine(Opts.PICLevel), SA);
3259     if (Opts.PIE)
3260       GenerateArg(Args, OPT_pic_is_pie, SA);
3261     for (StringRef Sanitizer : serializeSanitizerKinds(Opts.Sanitize))
3262       GenerateArg(Args, OPT_fsanitize_EQ, Sanitizer, SA);
3263 
3264     return;
3265   }
3266 
3267   OptSpecifier StdOpt;
3268   switch (Opts.LangStd) {
3269   case LangStandard::lang_opencl10:
3270   case LangStandard::lang_opencl11:
3271   case LangStandard::lang_opencl12:
3272   case LangStandard::lang_opencl20:
3273   case LangStandard::lang_opencl30:
3274   case LangStandard::lang_openclcpp10:
3275   case LangStandard::lang_openclcpp2021:
3276     StdOpt = OPT_cl_std_EQ;
3277     break;
3278   default:
3279     StdOpt = OPT_std_EQ;
3280     break;
3281   }
3282 
3283   auto LangStandard = LangStandard::getLangStandardForKind(Opts.LangStd);
3284   GenerateArg(Args, StdOpt, LangStandard.getName(), SA);
3285 
3286   if (Opts.IncludeDefaultHeader)
3287     GenerateArg(Args, OPT_finclude_default_header, SA);
3288   if (Opts.DeclareOpenCLBuiltins)
3289     GenerateArg(Args, OPT_fdeclare_opencl_builtins, SA);
3290 
3291   const LangOptions *LangOpts = &Opts;
3292 
3293 #define LANG_OPTION_WITH_MARSHALLING(                                          \
3294     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3295     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3296     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3297     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3298   GENERATE_OPTION_WITH_MARSHALLING(                                            \
3299       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
3300       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
3301 #include "clang/Driver/Options.inc"
3302 #undef LANG_OPTION_WITH_MARSHALLING
3303 
3304   // The '-fcf-protection=' option is generated by CodeGenOpts generator.
3305 
3306   if (Opts.ObjC) {
3307     GenerateArg(Args, OPT_fobjc_runtime_EQ, Opts.ObjCRuntime.getAsString(), SA);
3308 
3309     if (Opts.GC == LangOptions::GCOnly)
3310       GenerateArg(Args, OPT_fobjc_gc_only, SA);
3311     else if (Opts.GC == LangOptions::HybridGC)
3312       GenerateArg(Args, OPT_fobjc_gc, SA);
3313     else if (Opts.ObjCAutoRefCount == 1)
3314       GenerateArg(Args, OPT_fobjc_arc, SA);
3315 
3316     if (Opts.ObjCWeakRuntime)
3317       GenerateArg(Args, OPT_fobjc_runtime_has_weak, SA);
3318 
3319     if (Opts.ObjCWeak)
3320       GenerateArg(Args, OPT_fobjc_weak, SA);
3321 
3322     if (Opts.ObjCSubscriptingLegacyRuntime)
3323       GenerateArg(Args, OPT_fobjc_subscripting_legacy_runtime, SA);
3324   }
3325 
3326   if (Opts.GNUCVersion != 0) {
3327     unsigned Major = Opts.GNUCVersion / 100 / 100;
3328     unsigned Minor = (Opts.GNUCVersion / 100) % 100;
3329     unsigned Patch = Opts.GNUCVersion % 100;
3330     GenerateArg(Args, OPT_fgnuc_version_EQ,
3331                 Twine(Major) + "." + Twine(Minor) + "." + Twine(Patch), SA);
3332   }
3333 
3334   if (Opts.IgnoreXCOFFVisibility)
3335     GenerateArg(Args, OPT_mignore_xcoff_visibility, SA);
3336 
3337   if (Opts.SignedOverflowBehavior == LangOptions::SOB_Trapping) {
3338     GenerateArg(Args, OPT_ftrapv, SA);
3339     GenerateArg(Args, OPT_ftrapv_handler, Opts.OverflowHandler, SA);
3340   } else if (Opts.SignedOverflowBehavior == LangOptions::SOB_Defined) {
3341     GenerateArg(Args, OPT_fwrapv, SA);
3342   }
3343 
3344   if (Opts.MSCompatibilityVersion != 0) {
3345     unsigned Major = Opts.MSCompatibilityVersion / 10000000;
3346     unsigned Minor = (Opts.MSCompatibilityVersion / 100000) % 100;
3347     unsigned Subminor = Opts.MSCompatibilityVersion % 100000;
3348     GenerateArg(Args, OPT_fms_compatibility_version,
3349                 Twine(Major) + "." + Twine(Minor) + "." + Twine(Subminor), SA);
3350   }
3351 
3352   if ((!Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17) || T.isOSzOS()) {
3353     if (!Opts.Trigraphs)
3354       GenerateArg(Args, OPT_fno_trigraphs, SA);
3355   } else {
3356     if (Opts.Trigraphs)
3357       GenerateArg(Args, OPT_ftrigraphs, SA);
3358   }
3359 
3360   if (Opts.Blocks && !(Opts.OpenCL && Opts.OpenCLVersion == 200))
3361     GenerateArg(Args, OPT_fblocks, SA);
3362 
3363   if (Opts.ConvergentFunctions &&
3364       !(Opts.OpenCL || (Opts.CUDA && Opts.CUDAIsDevice) || Opts.SYCLIsDevice))
3365     GenerateArg(Args, OPT_fconvergent_functions, SA);
3366 
3367   if (Opts.NoBuiltin && !Opts.Freestanding)
3368     GenerateArg(Args, OPT_fno_builtin, SA);
3369 
3370   if (!Opts.NoBuiltin)
3371     for (const auto &Func : Opts.NoBuiltinFuncs)
3372       GenerateArg(Args, OPT_fno_builtin_, Func, SA);
3373 
3374   if (Opts.LongDoubleSize == 128)
3375     GenerateArg(Args, OPT_mlong_double_128, SA);
3376   else if (Opts.LongDoubleSize == 64)
3377     GenerateArg(Args, OPT_mlong_double_64, SA);
3378   else if (Opts.LongDoubleSize == 80)
3379     GenerateArg(Args, OPT_mlong_double_80, SA);
3380 
3381   // Not generating '-mrtd', it's just an alias for '-fdefault-calling-conv='.
3382 
3383   // OpenMP was requested via '-fopenmp', not implied by '-fopenmp-simd' or
3384   // '-fopenmp-targets='.
3385   if (Opts.OpenMP && !Opts.OpenMPSimd) {
3386     GenerateArg(Args, OPT_fopenmp, SA);
3387 
3388     if (Opts.OpenMP != 50)
3389       GenerateArg(Args, OPT_fopenmp_version_EQ, Twine(Opts.OpenMP), SA);
3390 
3391     if (!Opts.OpenMPUseTLS)
3392       GenerateArg(Args, OPT_fnoopenmp_use_tls, SA);
3393 
3394     if (Opts.OpenMPIsDevice)
3395       GenerateArg(Args, OPT_fopenmp_is_device, SA);
3396 
3397     if (Opts.OpenMPIRBuilder)
3398       GenerateArg(Args, OPT_fopenmp_enable_irbuilder, SA);
3399   }
3400 
3401   if (Opts.OpenMPSimd) {
3402     GenerateArg(Args, OPT_fopenmp_simd, SA);
3403 
3404     if (Opts.OpenMP != 50)
3405       GenerateArg(Args, OPT_fopenmp_version_EQ, Twine(Opts.OpenMP), SA);
3406   }
3407 
3408   if (Opts.OpenMPThreadSubscription)
3409     GenerateArg(Args, OPT_fopenmp_assume_threads_oversubscription, SA);
3410 
3411   if (Opts.OpenMPTeamSubscription)
3412     GenerateArg(Args, OPT_fopenmp_assume_teams_oversubscription, SA);
3413 
3414   if (Opts.OpenMPTargetDebug != 0)
3415     GenerateArg(Args, OPT_fopenmp_target_debug_EQ,
3416                 Twine(Opts.OpenMPTargetDebug), SA);
3417 
3418   if (Opts.OpenMPCUDANumSMs != 0)
3419     GenerateArg(Args, OPT_fopenmp_cuda_number_of_sm_EQ,
3420                 Twine(Opts.OpenMPCUDANumSMs), SA);
3421 
3422   if (Opts.OpenMPCUDABlocksPerSM != 0)
3423     GenerateArg(Args, OPT_fopenmp_cuda_blocks_per_sm_EQ,
3424                 Twine(Opts.OpenMPCUDABlocksPerSM), SA);
3425 
3426   if (Opts.OpenMPCUDAReductionBufNum != 1024)
3427     GenerateArg(Args, OPT_fopenmp_cuda_teams_reduction_recs_num_EQ,
3428                 Twine(Opts.OpenMPCUDAReductionBufNum), SA);
3429 
3430   if (!Opts.OMPTargetTriples.empty()) {
3431     std::string Targets;
3432     llvm::raw_string_ostream OS(Targets);
3433     llvm::interleave(
3434         Opts.OMPTargetTriples, OS,
3435         [&OS](const llvm::Triple &T) { OS << T.str(); }, ",");
3436     GenerateArg(Args, OPT_fopenmp_targets_EQ, OS.str(), SA);
3437   }
3438 
3439   if (!Opts.OMPHostIRFile.empty())
3440     GenerateArg(Args, OPT_fopenmp_host_ir_file_path, Opts.OMPHostIRFile, SA);
3441 
3442   if (Opts.OpenMPCUDAMode)
3443     GenerateArg(Args, OPT_fopenmp_cuda_mode, SA);
3444 
3445   if (Opts.OpenMPCUDAForceFullRuntime)
3446     GenerateArg(Args, OPT_fopenmp_cuda_force_full_runtime, SA);
3447 
3448   // The arguments used to set Optimize, OptimizeSize and NoInlineDefine are
3449   // generated from CodeGenOptions.
3450 
3451   if (Opts.DefaultFPContractMode == LangOptions::FPM_Fast)
3452     GenerateArg(Args, OPT_ffp_contract, "fast", SA);
3453   else if (Opts.DefaultFPContractMode == LangOptions::FPM_On)
3454     GenerateArg(Args, OPT_ffp_contract, "on", SA);
3455   else if (Opts.DefaultFPContractMode == LangOptions::FPM_Off)
3456     GenerateArg(Args, OPT_ffp_contract, "off", SA);
3457   else if (Opts.DefaultFPContractMode == LangOptions::FPM_FastHonorPragmas)
3458     GenerateArg(Args, OPT_ffp_contract, "fast-honor-pragmas", SA);
3459 
3460   for (StringRef Sanitizer : serializeSanitizerKinds(Opts.Sanitize))
3461     GenerateArg(Args, OPT_fsanitize_EQ, Sanitizer, SA);
3462 
3463   // Conflating '-fsanitize-system-ignorelist' and '-fsanitize-ignorelist'.
3464   for (const std::string &F : Opts.NoSanitizeFiles)
3465     GenerateArg(Args, OPT_fsanitize_ignorelist_EQ, F, SA);
3466 
3467   if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver3_8)
3468     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "3.8", SA);
3469   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver4)
3470     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "4.0", SA);
3471   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver6)
3472     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "6.0", SA);
3473   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver7)
3474     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "7.0", SA);
3475   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver9)
3476     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "9.0", SA);
3477   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver11)
3478     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "11.0", SA);
3479   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver12)
3480     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "12.0", SA);
3481   else if (Opts.getClangABICompat() == LangOptions::ClangABI::Ver14)
3482     GenerateArg(Args, OPT_fclang_abi_compat_EQ, "14.0", SA);
3483 
3484   if (Opts.getSignReturnAddressScope() ==
3485       LangOptions::SignReturnAddressScopeKind::All)
3486     GenerateArg(Args, OPT_msign_return_address_EQ, "all", SA);
3487   else if (Opts.getSignReturnAddressScope() ==
3488            LangOptions::SignReturnAddressScopeKind::NonLeaf)
3489     GenerateArg(Args, OPT_msign_return_address_EQ, "non-leaf", SA);
3490 
3491   if (Opts.getSignReturnAddressKey() ==
3492       LangOptions::SignReturnAddressKeyKind::BKey)
3493     GenerateArg(Args, OPT_msign_return_address_key_EQ, "b_key", SA);
3494 
3495   if (Opts.CXXABI)
3496     GenerateArg(Args, OPT_fcxx_abi_EQ, TargetCXXABI::getSpelling(*Opts.CXXABI),
3497                 SA);
3498 
3499   if (Opts.RelativeCXXABIVTables)
3500     GenerateArg(Args, OPT_fexperimental_relative_cxx_abi_vtables, SA);
3501   else
3502     GenerateArg(Args, OPT_fno_experimental_relative_cxx_abi_vtables, SA);
3503 
3504   if (Opts.UseTargetPathSeparator)
3505     GenerateArg(Args, OPT_ffile_reproducible, SA);
3506   else
3507     GenerateArg(Args, OPT_fno_file_reproducible, SA);
3508 
3509   for (const auto &MP : Opts.MacroPrefixMap)
3510     GenerateArg(Args, OPT_fmacro_prefix_map_EQ, MP.first + "=" + MP.second, SA);
3511 
3512   if (!Opts.RandstructSeed.empty())
3513     GenerateArg(Args, OPT_frandomize_layout_seed_EQ, Opts.RandstructSeed, SA);
3514 }
3515 
3516 bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
3517                                        InputKind IK, const llvm::Triple &T,
3518                                        std::vector<std::string> &Includes,
3519                                        DiagnosticsEngine &Diags) {
3520   unsigned NumErrorsBefore = Diags.getNumErrors();
3521 
3522   if (IK.getFormat() == InputKind::Precompiled ||
3523       IK.getLanguage() == Language::LLVM_IR) {
3524     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
3525     // PassManager in BackendUtil.cpp. They need to be initialized no matter
3526     // what the input type is.
3527     if (Args.hasArg(OPT_fobjc_arc))
3528       Opts.ObjCAutoRefCount = 1;
3529     // PICLevel and PIELevel are needed during code generation and this should
3530     // be set regardless of the input type.
3531     Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
3532     Opts.PIE = Args.hasArg(OPT_pic_is_pie);
3533     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3534                         Diags, Opts.Sanitize);
3535 
3536     return Diags.getNumErrors() == NumErrorsBefore;
3537   }
3538 
3539   // Other LangOpts are only initialized when the input is not AST or LLVM IR.
3540   // FIXME: Should we really be parsing this for an Language::Asm input?
3541 
3542   // FIXME: Cleanup per-file based stuff.
3543   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
3544   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
3545     LangStd = LangStandard::getLangKind(A->getValue());
3546     if (LangStd == LangStandard::lang_unspecified) {
3547       Diags.Report(diag::err_drv_invalid_value)
3548         << A->getAsString(Args) << A->getValue();
3549       // Report supported standards with short description.
3550       for (unsigned KindValue = 0;
3551            KindValue != LangStandard::lang_unspecified;
3552            ++KindValue) {
3553         const LangStandard &Std = LangStandard::getLangStandardForKind(
3554           static_cast<LangStandard::Kind>(KindValue));
3555         if (IsInputCompatibleWithStandard(IK, Std)) {
3556           auto Diag = Diags.Report(diag::note_drv_use_standard);
3557           Diag << Std.getName() << Std.getDescription();
3558           unsigned NumAliases = 0;
3559 #define LANGSTANDARD(id, name, lang, desc, features)
3560 #define LANGSTANDARD_ALIAS(id, alias) \
3561           if (KindValue == LangStandard::lang_##id) ++NumAliases;
3562 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
3563 #include "clang/Basic/LangStandards.def"
3564           Diag << NumAliases;
3565 #define LANGSTANDARD(id, name, lang, desc, features)
3566 #define LANGSTANDARD_ALIAS(id, alias) \
3567           if (KindValue == LangStandard::lang_##id) Diag << alias;
3568 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
3569 #include "clang/Basic/LangStandards.def"
3570         }
3571       }
3572     } else {
3573       // Valid standard, check to make sure language and standard are
3574       // compatible.
3575       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
3576       if (!IsInputCompatibleWithStandard(IK, Std)) {
3577         Diags.Report(diag::err_drv_argument_not_allowed_with)
3578           << A->getAsString(Args) << GetInputKindName(IK);
3579       }
3580     }
3581   }
3582 
3583   // -cl-std only applies for OpenCL language standards.
3584   // Override the -std option in this case.
3585   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
3586     LangStandard::Kind OpenCLLangStd
3587       = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
3588         .Cases("cl", "CL", LangStandard::lang_opencl10)
3589         .Cases("cl1.0", "CL1.0", LangStandard::lang_opencl10)
3590         .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
3591         .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
3592         .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
3593         .Cases("cl3.0", "CL3.0", LangStandard::lang_opencl30)
3594         .Cases("clc++", "CLC++", LangStandard::lang_openclcpp10)
3595         .Cases("clc++1.0", "CLC++1.0", LangStandard::lang_openclcpp10)
3596         .Cases("clc++2021", "CLC++2021", LangStandard::lang_openclcpp2021)
3597         .Default(LangStandard::lang_unspecified);
3598 
3599     if (OpenCLLangStd == LangStandard::lang_unspecified) {
3600       Diags.Report(diag::err_drv_invalid_value)
3601         << A->getAsString(Args) << A->getValue();
3602     }
3603     else
3604       LangStd = OpenCLLangStd;
3605   }
3606 
3607   // These need to be parsed now. They are used to set OpenCL defaults.
3608   Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
3609   Opts.DeclareOpenCLBuiltins = Args.hasArg(OPT_fdeclare_opencl_builtins);
3610 
3611   LangOptions::setLangDefaults(Opts, IK.getLanguage(), T, Includes, LangStd);
3612 
3613   // The key paths of codegen options defined in Options.td start with
3614   // "LangOpts->". Let's provide the expected variable name and type.
3615   LangOptions *LangOpts = &Opts;
3616 
3617 #define LANG_OPTION_WITH_MARSHALLING(                                          \
3618     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
3619     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
3620     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
3621     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
3622   PARSE_OPTION_WITH_MARSHALLING(                                               \
3623       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
3624       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
3625 #include "clang/Driver/Options.inc"
3626 #undef LANG_OPTION_WITH_MARSHALLING
3627 
3628   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
3629     StringRef Name = A->getValue();
3630     if (Name == "full" || Name == "branch") {
3631       Opts.CFProtectionBranch = 1;
3632     }
3633   }
3634 
3635   if ((Args.hasArg(OPT_fsycl_is_device) || Args.hasArg(OPT_fsycl_is_host)) &&
3636       !Args.hasArg(OPT_sycl_std_EQ)) {
3637     // If the user supplied -fsycl-is-device or -fsycl-is-host, but failed to
3638     // provide -sycl-std=, we want to default it to whatever the default SYCL
3639     // version is. I could not find a way to express this with the options
3640     // tablegen because we still want this value to be SYCL_None when the user
3641     // is not in device or host mode.
3642     Opts.setSYCLVersion(LangOptions::SYCL_Default);
3643   }
3644 
3645   if (Opts.ObjC) {
3646     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
3647       StringRef value = arg->getValue();
3648       if (Opts.ObjCRuntime.tryParse(value))
3649         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
3650     }
3651 
3652     if (Args.hasArg(OPT_fobjc_gc_only))
3653       Opts.setGC(LangOptions::GCOnly);
3654     else if (Args.hasArg(OPT_fobjc_gc))
3655       Opts.setGC(LangOptions::HybridGC);
3656     else if (Args.hasArg(OPT_fobjc_arc)) {
3657       Opts.ObjCAutoRefCount = 1;
3658       if (!Opts.ObjCRuntime.allowsARC())
3659         Diags.Report(diag::err_arc_unsupported_on_runtime);
3660     }
3661 
3662     // ObjCWeakRuntime tracks whether the runtime supports __weak, not
3663     // whether the feature is actually enabled.  This is predominantly
3664     // determined by -fobjc-runtime, but we allow it to be overridden
3665     // from the command line for testing purposes.
3666     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
3667       Opts.ObjCWeakRuntime = 1;
3668     else
3669       Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
3670 
3671     // ObjCWeak determines whether __weak is actually enabled.
3672     // Note that we allow -fno-objc-weak to disable this even in ARC mode.
3673     if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
3674       if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
3675         assert(!Opts.ObjCWeak);
3676       } else if (Opts.getGC() != LangOptions::NonGC) {
3677         Diags.Report(diag::err_objc_weak_with_gc);
3678       } else if (!Opts.ObjCWeakRuntime) {
3679         Diags.Report(diag::err_objc_weak_unsupported);
3680       } else {
3681         Opts.ObjCWeak = 1;
3682       }
3683     } else if (Opts.ObjCAutoRefCount) {
3684       Opts.ObjCWeak = Opts.ObjCWeakRuntime;
3685     }
3686 
3687     if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
3688       Opts.ObjCSubscriptingLegacyRuntime =
3689         (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
3690   }
3691 
3692   if (Arg *A = Args.getLastArg(options::OPT_fgnuc_version_EQ)) {
3693     // Check that the version has 1 to 3 components and the minor and patch
3694     // versions fit in two decimal digits.
3695     VersionTuple GNUCVer;
3696     bool Invalid = GNUCVer.tryParse(A->getValue());
3697     unsigned Major = GNUCVer.getMajor();
3698     unsigned Minor = GNUCVer.getMinor().value_or(0);
3699     unsigned Patch = GNUCVer.getSubminor().value_or(0);
3700     if (Invalid || GNUCVer.getBuild() || Minor >= 100 || Patch >= 100) {
3701       Diags.Report(diag::err_drv_invalid_value)
3702           << A->getAsString(Args) << A->getValue();
3703     }
3704     Opts.GNUCVersion = Major * 100 * 100 + Minor * 100 + Patch;
3705   }
3706 
3707   if (T.isOSAIX() && (Args.hasArg(OPT_mignore_xcoff_visibility)))
3708     Opts.IgnoreXCOFFVisibility = 1;
3709 
3710   if (Args.hasArg(OPT_ftrapv)) {
3711     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
3712     // Set the handler, if one is specified.
3713     Opts.OverflowHandler =
3714         std::string(Args.getLastArgValue(OPT_ftrapv_handler));
3715   }
3716   else if (Args.hasArg(OPT_fwrapv))
3717     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
3718 
3719   Opts.MSCompatibilityVersion = 0;
3720   if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
3721     VersionTuple VT;
3722     if (VT.tryParse(A->getValue()))
3723       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
3724                                                 << A->getValue();
3725     Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
3726                                   VT.getMinor().value_or(0) * 100000 +
3727                                   VT.getSubminor().value_or(0);
3728   }
3729 
3730   // Mimicking gcc's behavior, trigraphs are only enabled if -trigraphs
3731   // is specified, or -std is set to a conforming mode.
3732   // Trigraphs are disabled by default in c++1z onwards.
3733   // For z/OS, trigraphs are enabled by default (without regard to the above).
3734   Opts.Trigraphs =
3735       (!Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17) || T.isOSzOS();
3736   Opts.Trigraphs =
3737       Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
3738 
3739   Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
3740     && Opts.OpenCLVersion == 200);
3741 
3742   Opts.ConvergentFunctions = Opts.OpenCL || (Opts.CUDA && Opts.CUDAIsDevice) ||
3743                              Opts.SYCLIsDevice ||
3744                              Args.hasArg(OPT_fconvergent_functions);
3745 
3746   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
3747   if (!Opts.NoBuiltin)
3748     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
3749   if (Arg *A = Args.getLastArg(options::OPT_LongDouble_Group)) {
3750     if (A->getOption().matches(options::OPT_mlong_double_64))
3751       Opts.LongDoubleSize = 64;
3752     else if (A->getOption().matches(options::OPT_mlong_double_80))
3753       Opts.LongDoubleSize = 80;
3754     else if (A->getOption().matches(options::OPT_mlong_double_128))
3755       Opts.LongDoubleSize = 128;
3756     else
3757       Opts.LongDoubleSize = 0;
3758   }
3759   if (Opts.FastRelaxedMath)
3760     Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3761 
3762   llvm::sort(Opts.ModuleFeatures);
3763 
3764   // -mrtd option
3765   if (Arg *A = Args.getLastArg(OPT_mrtd)) {
3766     if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
3767       Diags.Report(diag::err_drv_argument_not_allowed_with)
3768           << A->getSpelling() << "-fdefault-calling-conv";
3769     else {
3770       if (T.getArch() != llvm::Triple::x86)
3771         Diags.Report(diag::err_drv_argument_not_allowed_with)
3772             << A->getSpelling() << T.getTriple();
3773       else
3774         Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
3775     }
3776   }
3777 
3778   // Check if -fopenmp is specified and set default version to 5.0.
3779   Opts.OpenMP = Args.hasArg(OPT_fopenmp) ? 50 : 0;
3780   // Check if -fopenmp-simd is specified.
3781   bool IsSimdSpecified =
3782       Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
3783                    /*Default=*/false);
3784   Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
3785   Opts.OpenMPUseTLS =
3786       Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
3787   Opts.OpenMPIsDevice =
3788       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
3789   Opts.OpenMPIRBuilder =
3790       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_enable_irbuilder);
3791   bool IsTargetSpecified =
3792       Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
3793 
3794   Opts.ConvergentFunctions = Opts.ConvergentFunctions || Opts.OpenMPIsDevice;
3795 
3796   if (Opts.OpenMP || Opts.OpenMPSimd) {
3797     if (int Version = getLastArgIntValue(
3798             Args, OPT_fopenmp_version_EQ,
3799             (IsSimdSpecified || IsTargetSpecified) ? 50 : Opts.OpenMP, Diags))
3800       Opts.OpenMP = Version;
3801     // Provide diagnostic when a given target is not expected to be an OpenMP
3802     // device or host.
3803     if (!Opts.OpenMPIsDevice) {
3804       switch (T.getArch()) {
3805       default:
3806         break;
3807       // Add unsupported host targets here:
3808       case llvm::Triple::nvptx:
3809       case llvm::Triple::nvptx64:
3810         Diags.Report(diag::err_drv_omp_host_target_not_supported) << T.str();
3811         break;
3812       }
3813     }
3814   }
3815 
3816   // Set the flag to prevent the implementation from emitting device exception
3817   // handling code for those requiring so.
3818   if ((Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN())) ||
3819       Opts.OpenCLCPlusPlus) {
3820 
3821     Opts.Exceptions = 0;
3822     Opts.CXXExceptions = 0;
3823   }
3824   if (Opts.OpenMPIsDevice && T.isNVPTX()) {
3825     Opts.OpenMPCUDANumSMs =
3826         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_number_of_sm_EQ,
3827                            Opts.OpenMPCUDANumSMs, Diags);
3828     Opts.OpenMPCUDABlocksPerSM =
3829         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_blocks_per_sm_EQ,
3830                            Opts.OpenMPCUDABlocksPerSM, Diags);
3831     Opts.OpenMPCUDAReductionBufNum = getLastArgIntValue(
3832         Args, options::OPT_fopenmp_cuda_teams_reduction_recs_num_EQ,
3833         Opts.OpenMPCUDAReductionBufNum, Diags);
3834   }
3835 
3836   // Set the value of the debugging flag used in the new offloading device RTL.
3837   // Set either by a specific value or to a default if not specified.
3838   if (Opts.OpenMPIsDevice && (Args.hasArg(OPT_fopenmp_target_debug) ||
3839                               Args.hasArg(OPT_fopenmp_target_debug_EQ))) {
3840     Opts.OpenMPTargetDebug = getLastArgIntValue(
3841         Args, OPT_fopenmp_target_debug_EQ, Opts.OpenMPTargetDebug, Diags);
3842     if (!Opts.OpenMPTargetDebug && Args.hasArg(OPT_fopenmp_target_debug))
3843       Opts.OpenMPTargetDebug = 1;
3844   }
3845 
3846   if (Opts.OpenMPIsDevice) {
3847     if (Args.hasArg(OPT_fopenmp_assume_teams_oversubscription))
3848       Opts.OpenMPTeamSubscription = true;
3849     if (Args.hasArg(OPT_fopenmp_assume_threads_oversubscription))
3850       Opts.OpenMPThreadSubscription = true;
3851   }
3852 
3853   // Get the OpenMP target triples if any.
3854   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
3855     enum ArchPtrSize { Arch16Bit, Arch32Bit, Arch64Bit };
3856     auto getArchPtrSize = [](const llvm::Triple &T) {
3857       if (T.isArch16Bit())
3858         return Arch16Bit;
3859       if (T.isArch32Bit())
3860         return Arch32Bit;
3861       assert(T.isArch64Bit() && "Expected 64-bit architecture");
3862       return Arch64Bit;
3863     };
3864 
3865     for (unsigned i = 0; i < A->getNumValues(); ++i) {
3866       llvm::Triple TT(A->getValue(i));
3867 
3868       if (TT.getArch() == llvm::Triple::UnknownArch ||
3869           !(TT.getArch() == llvm::Triple::aarch64 || TT.isPPC() ||
3870             TT.getArch() == llvm::Triple::nvptx ||
3871             TT.getArch() == llvm::Triple::nvptx64 ||
3872             TT.getArch() == llvm::Triple::amdgcn ||
3873             TT.getArch() == llvm::Triple::x86 ||
3874             TT.getArch() == llvm::Triple::x86_64))
3875         Diags.Report(diag::err_drv_invalid_omp_target) << A->getValue(i);
3876       else if (getArchPtrSize(T) != getArchPtrSize(TT))
3877         Diags.Report(diag::err_drv_incompatible_omp_arch)
3878             << A->getValue(i) << T.str();
3879       else
3880         Opts.OMPTargetTriples.push_back(TT);
3881     }
3882   }
3883 
3884   // Get OpenMP host file path if any and report if a non existent file is
3885   // found
3886   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
3887     Opts.OMPHostIRFile = A->getValue();
3888     if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
3889       Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
3890           << Opts.OMPHostIRFile;
3891   }
3892 
3893   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
3894   Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3895                         Args.hasArg(options::OPT_fopenmp_cuda_mode);
3896 
3897   // Set CUDA mode for OpenMP target NVPTX/AMDGCN if specified in options
3898   Opts.OpenMPCUDAForceFullRuntime =
3899       Opts.OpenMPIsDevice && (T.isNVPTX() || T.isAMDGCN()) &&
3900       Args.hasArg(options::OPT_fopenmp_cuda_force_full_runtime);
3901 
3902   // FIXME: Eliminate this dependency.
3903   unsigned Opt = getOptimizationLevel(Args, IK, Diags),
3904        OptSize = getOptimizationLevelSize(Args);
3905   Opts.Optimize = Opt != 0;
3906   Opts.OptimizeSize = OptSize != 0;
3907 
3908   // This is the __NO_INLINE__ define, which just depends on things like the
3909   // optimization level and -fno-inline, not actually whether the backend has
3910   // inlining enabled.
3911   Opts.NoInlineDefine = !Opts.Optimize;
3912   if (Arg *InlineArg = Args.getLastArg(
3913           options::OPT_finline_functions, options::OPT_finline_hint_functions,
3914           options::OPT_fno_inline_functions, options::OPT_fno_inline))
3915     if (InlineArg->getOption().matches(options::OPT_fno_inline))
3916       Opts.NoInlineDefine = true;
3917 
3918   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
3919     StringRef Val = A->getValue();
3920     if (Val == "fast")
3921       Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
3922     else if (Val == "on")
3923       Opts.setDefaultFPContractMode(LangOptions::FPM_On);
3924     else if (Val == "off")
3925       Opts.setDefaultFPContractMode(LangOptions::FPM_Off);
3926     else if (Val == "fast-honor-pragmas")
3927       Opts.setDefaultFPContractMode(LangOptions::FPM_FastHonorPragmas);
3928     else
3929       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
3930   }
3931 
3932   // Parse -fsanitize= arguments.
3933   parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3934                       Diags, Opts.Sanitize);
3935   Opts.NoSanitizeFiles = Args.getAllArgValues(OPT_fsanitize_ignorelist_EQ);
3936   std::vector<std::string> systemIgnorelists =
3937       Args.getAllArgValues(OPT_fsanitize_system_ignorelist_EQ);
3938   Opts.NoSanitizeFiles.insert(Opts.NoSanitizeFiles.end(),
3939                               systemIgnorelists.begin(),
3940                               systemIgnorelists.end());
3941 
3942   if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
3943     Opts.setClangABICompat(LangOptions::ClangABI::Latest);
3944 
3945     StringRef Ver = A->getValue();
3946     std::pair<StringRef, StringRef> VerParts = Ver.split('.');
3947     unsigned Major, Minor = 0;
3948 
3949     // Check the version number is valid: either 3.x (0 <= x <= 9) or
3950     // y or y.0 (4 <= y <= current version).
3951     if (!VerParts.first.startswith("0") &&
3952         !VerParts.first.getAsInteger(10, Major) &&
3953         3 <= Major && Major <= CLANG_VERSION_MAJOR &&
3954         (Major == 3 ? VerParts.second.size() == 1 &&
3955                       !VerParts.second.getAsInteger(10, Minor)
3956                     : VerParts.first.size() == Ver.size() ||
3957                       VerParts.second == "0")) {
3958       // Got a valid version number.
3959       if (Major == 3 && Minor <= 8)
3960         Opts.setClangABICompat(LangOptions::ClangABI::Ver3_8);
3961       else if (Major <= 4)
3962         Opts.setClangABICompat(LangOptions::ClangABI::Ver4);
3963       else if (Major <= 6)
3964         Opts.setClangABICompat(LangOptions::ClangABI::Ver6);
3965       else if (Major <= 7)
3966         Opts.setClangABICompat(LangOptions::ClangABI::Ver7);
3967       else if (Major <= 9)
3968         Opts.setClangABICompat(LangOptions::ClangABI::Ver9);
3969       else if (Major <= 11)
3970         Opts.setClangABICompat(LangOptions::ClangABI::Ver11);
3971       else if (Major <= 12)
3972         Opts.setClangABICompat(LangOptions::ClangABI::Ver12);
3973       else if (Major <= 14)
3974         Opts.setClangABICompat(LangOptions::ClangABI::Ver14);
3975     } else if (Ver != "latest") {
3976       Diags.Report(diag::err_drv_invalid_value)
3977           << A->getAsString(Args) << A->getValue();
3978     }
3979   }
3980 
3981   if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
3982     StringRef SignScope = A->getValue();
3983 
3984     if (SignScope.equals_insensitive("none"))
3985       Opts.setSignReturnAddressScope(
3986           LangOptions::SignReturnAddressScopeKind::None);
3987     else if (SignScope.equals_insensitive("all"))
3988       Opts.setSignReturnAddressScope(
3989           LangOptions::SignReturnAddressScopeKind::All);
3990     else if (SignScope.equals_insensitive("non-leaf"))
3991       Opts.setSignReturnAddressScope(
3992           LangOptions::SignReturnAddressScopeKind::NonLeaf);
3993     else
3994       Diags.Report(diag::err_drv_invalid_value)
3995           << A->getAsString(Args) << SignScope;
3996 
3997     if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
3998       StringRef SignKey = A->getValue();
3999       if (!SignScope.empty() && !SignKey.empty()) {
4000         if (SignKey.equals_insensitive("a_key"))
4001           Opts.setSignReturnAddressKey(
4002               LangOptions::SignReturnAddressKeyKind::AKey);
4003         else if (SignKey.equals_insensitive("b_key"))
4004           Opts.setSignReturnAddressKey(
4005               LangOptions::SignReturnAddressKeyKind::BKey);
4006         else
4007           Diags.Report(diag::err_drv_invalid_value)
4008               << A->getAsString(Args) << SignKey;
4009       }
4010     }
4011   }
4012 
4013   // The value can be empty, which indicates the system default should be used.
4014   StringRef CXXABI = Args.getLastArgValue(OPT_fcxx_abi_EQ);
4015   if (!CXXABI.empty()) {
4016     if (!TargetCXXABI::isABI(CXXABI)) {
4017       Diags.Report(diag::err_invalid_cxx_abi) << CXXABI;
4018     } else {
4019       auto Kind = TargetCXXABI::getKind(CXXABI);
4020       if (!TargetCXXABI::isSupportedCXXABI(T, Kind))
4021         Diags.Report(diag::err_unsupported_cxx_abi) << CXXABI << T.str();
4022       else
4023         Opts.CXXABI = Kind;
4024     }
4025   }
4026 
4027   Opts.RelativeCXXABIVTables =
4028       Args.hasFlag(options::OPT_fexperimental_relative_cxx_abi_vtables,
4029                    options::OPT_fno_experimental_relative_cxx_abi_vtables,
4030                    TargetCXXABI::usesRelativeVTables(T));
4031 
4032   for (const auto &A : Args.getAllArgValues(OPT_fmacro_prefix_map_EQ)) {
4033     auto Split = StringRef(A).split('=');
4034     Opts.MacroPrefixMap.insert(
4035         {std::string(Split.first), std::string(Split.second)});
4036   }
4037 
4038   Opts.UseTargetPathSeparator =
4039       !Args.getLastArg(OPT_fno_file_reproducible) &&
4040       (Args.getLastArg(OPT_ffile_compilation_dir_EQ) ||
4041        Args.getLastArg(OPT_fmacro_prefix_map_EQ) ||
4042        Args.getLastArg(OPT_ffile_reproducible));
4043 
4044   // Error if -mvscale-min is unbounded.
4045   if (Arg *A = Args.getLastArg(options::OPT_mvscale_min_EQ)) {
4046     unsigned VScaleMin;
4047     if (StringRef(A->getValue()).getAsInteger(10, VScaleMin) || VScaleMin == 0)
4048       Diags.Report(diag::err_cc1_unbounded_vscale_min);
4049   }
4050 
4051   if (const Arg *A = Args.getLastArg(OPT_frandomize_layout_seed_file_EQ)) {
4052     std::ifstream SeedFile(A->getValue(0));
4053 
4054     if (!SeedFile.is_open())
4055       Diags.Report(diag::err_drv_cannot_open_randomize_layout_seed_file)
4056           << A->getValue(0);
4057 
4058     std::getline(SeedFile, Opts.RandstructSeed);
4059   }
4060 
4061   if (const Arg *A = Args.getLastArg(OPT_frandomize_layout_seed_EQ))
4062     Opts.RandstructSeed = A->getValue(0);
4063 
4064   return Diags.getNumErrors() == NumErrorsBefore;
4065 }
4066 
4067 static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
4068   switch (Action) {
4069   case frontend::ASTDeclList:
4070   case frontend::ASTDump:
4071   case frontend::ASTPrint:
4072   case frontend::ASTView:
4073   case frontend::EmitAssembly:
4074   case frontend::EmitBC:
4075   case frontend::EmitHTML:
4076   case frontend::EmitLLVM:
4077   case frontend::EmitLLVMOnly:
4078   case frontend::EmitCodeGenOnly:
4079   case frontend::EmitObj:
4080   case frontend::ExtractAPI:
4081   case frontend::FixIt:
4082   case frontend::GenerateModule:
4083   case frontend::GenerateModuleInterface:
4084   case frontend::GenerateHeaderModule:
4085   case frontend::GenerateHeaderUnit:
4086   case frontend::GeneratePCH:
4087   case frontend::GenerateInterfaceStubs:
4088   case frontend::ParseSyntaxOnly:
4089   case frontend::ModuleFileInfo:
4090   case frontend::VerifyPCH:
4091   case frontend::PluginAction:
4092   case frontend::RewriteObjC:
4093   case frontend::RewriteTest:
4094   case frontend::RunAnalysis:
4095   case frontend::TemplightDump:
4096   case frontend::MigrateSource:
4097     return false;
4098 
4099   case frontend::DumpCompilerOptions:
4100   case frontend::DumpRawTokens:
4101   case frontend::DumpTokens:
4102   case frontend::InitOnly:
4103   case frontend::PrintPreamble:
4104   case frontend::PrintPreprocessedInput:
4105   case frontend::RewriteMacros:
4106   case frontend::RunPreprocessorOnly:
4107   case frontend::PrintDependencyDirectivesSourceMinimizerOutput:
4108     return true;
4109   }
4110   llvm_unreachable("invalid frontend action");
4111 }
4112 
4113 static void GeneratePreprocessorArgs(PreprocessorOptions &Opts,
4114                                      SmallVectorImpl<const char *> &Args,
4115                                      CompilerInvocation::StringAllocator SA,
4116                                      const LangOptions &LangOpts,
4117                                      const FrontendOptions &FrontendOpts,
4118                                      const CodeGenOptions &CodeGenOpts) {
4119   PreprocessorOptions *PreprocessorOpts = &Opts;
4120 
4121 #define PREPROCESSOR_OPTION_WITH_MARSHALLING(                                  \
4122     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4123     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4124     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4125     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4126   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4127       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4128       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4129 #include "clang/Driver/Options.inc"
4130 #undef PREPROCESSOR_OPTION_WITH_MARSHALLING
4131 
4132   if (Opts.PCHWithHdrStop && !Opts.PCHWithHdrStopCreate)
4133     GenerateArg(Args, OPT_pch_through_hdrstop_use, SA);
4134 
4135   for (const auto &D : Opts.DeserializedPCHDeclsToErrorOn)
4136     GenerateArg(Args, OPT_error_on_deserialized_pch_decl, D, SA);
4137 
4138   if (Opts.PrecompiledPreambleBytes != std::make_pair(0u, false))
4139     GenerateArg(Args, OPT_preamble_bytes_EQ,
4140                 Twine(Opts.PrecompiledPreambleBytes.first) + "," +
4141                     (Opts.PrecompiledPreambleBytes.second ? "1" : "0"),
4142                 SA);
4143 
4144   for (const auto &M : Opts.Macros) {
4145     // Don't generate __CET__ macro definitions. They are implied by the
4146     // -fcf-protection option that is generated elsewhere.
4147     if (M.first == "__CET__=1" && !M.second &&
4148         !CodeGenOpts.CFProtectionReturn && CodeGenOpts.CFProtectionBranch)
4149       continue;
4150     if (M.first == "__CET__=2" && !M.second && CodeGenOpts.CFProtectionReturn &&
4151         !CodeGenOpts.CFProtectionBranch)
4152       continue;
4153     if (M.first == "__CET__=3" && !M.second && CodeGenOpts.CFProtectionReturn &&
4154         CodeGenOpts.CFProtectionBranch)
4155       continue;
4156 
4157     GenerateArg(Args, M.second ? OPT_U : OPT_D, M.first, SA);
4158   }
4159 
4160   for (const auto &I : Opts.Includes) {
4161     // Don't generate OpenCL includes. They are implied by other flags that are
4162     // generated elsewhere.
4163     if (LangOpts.OpenCL && LangOpts.IncludeDefaultHeader &&
4164         ((LangOpts.DeclareOpenCLBuiltins && I == "opencl-c-base.h") ||
4165          I == "opencl-c.h"))
4166       continue;
4167     // Don't generate HLSL includes. They are implied by other flags that are
4168     // generated elsewhere.
4169     if (LangOpts.HLSL && I == "hlsl.h")
4170       continue;
4171 
4172     GenerateArg(Args, OPT_include, I, SA);
4173   }
4174 
4175   for (const auto &CI : Opts.ChainedIncludes)
4176     GenerateArg(Args, OPT_chain_include, CI, SA);
4177 
4178   for (const auto &RF : Opts.RemappedFiles)
4179     GenerateArg(Args, OPT_remap_file, RF.first + ";" + RF.second, SA);
4180 
4181   // Don't handle LexEditorPlaceholders. It is implied by the action that is
4182   // generated elsewhere.
4183 }
4184 
4185 static bool ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
4186                                   DiagnosticsEngine &Diags,
4187                                   frontend::ActionKind Action,
4188                                   const FrontendOptions &FrontendOpts) {
4189   unsigned NumErrorsBefore = Diags.getNumErrors();
4190 
4191   PreprocessorOptions *PreprocessorOpts = &Opts;
4192 
4193 #define PREPROCESSOR_OPTION_WITH_MARSHALLING(                                  \
4194     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4195     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4196     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4197     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4198   PARSE_OPTION_WITH_MARSHALLING(                                               \
4199       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4200       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4201 #include "clang/Driver/Options.inc"
4202 #undef PREPROCESSOR_OPTION_WITH_MARSHALLING
4203 
4204   Opts.PCHWithHdrStop = Args.hasArg(OPT_pch_through_hdrstop_create) ||
4205                         Args.hasArg(OPT_pch_through_hdrstop_use);
4206 
4207   for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
4208     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
4209 
4210   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
4211     StringRef Value(A->getValue());
4212     size_t Comma = Value.find(',');
4213     unsigned Bytes = 0;
4214     unsigned EndOfLine = 0;
4215 
4216     if (Comma == StringRef::npos ||
4217         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
4218         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
4219       Diags.Report(diag::err_drv_preamble_format);
4220     else {
4221       Opts.PrecompiledPreambleBytes.first = Bytes;
4222       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
4223     }
4224   }
4225 
4226   // Add the __CET__ macro if a CFProtection option is set.
4227   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
4228     StringRef Name = A->getValue();
4229     if (Name == "branch")
4230       Opts.addMacroDef("__CET__=1");
4231     else if (Name == "return")
4232       Opts.addMacroDef("__CET__=2");
4233     else if (Name == "full")
4234       Opts.addMacroDef("__CET__=3");
4235   }
4236 
4237   // Add macros from the command line.
4238   for (const auto *A : Args.filtered(OPT_D, OPT_U)) {
4239     if (A->getOption().matches(OPT_D))
4240       Opts.addMacroDef(A->getValue());
4241     else
4242       Opts.addMacroUndef(A->getValue());
4243   }
4244 
4245   // Add the ordered list of -includes.
4246   for (const auto *A : Args.filtered(OPT_include))
4247     Opts.Includes.emplace_back(A->getValue());
4248 
4249   for (const auto *A : Args.filtered(OPT_chain_include))
4250     Opts.ChainedIncludes.emplace_back(A->getValue());
4251 
4252   for (const auto *A : Args.filtered(OPT_remap_file)) {
4253     std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
4254 
4255     if (Split.second.empty()) {
4256       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
4257       continue;
4258     }
4259 
4260     Opts.addRemappedFile(Split.first, Split.second);
4261   }
4262 
4263   // Always avoid lexing editor placeholders when we're just running the
4264   // preprocessor as we never want to emit the
4265   // "editor placeholder in source file" error in PP only mode.
4266   if (isStrictlyPreprocessorAction(Action))
4267     Opts.LexEditorPlaceholders = false;
4268 
4269   return Diags.getNumErrors() == NumErrorsBefore;
4270 }
4271 
4272 static void GeneratePreprocessorOutputArgs(
4273     const PreprocessorOutputOptions &Opts, SmallVectorImpl<const char *> &Args,
4274     CompilerInvocation::StringAllocator SA, frontend::ActionKind Action) {
4275   const PreprocessorOutputOptions &PreprocessorOutputOpts = Opts;
4276 
4277 #define PREPROCESSOR_OUTPUT_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   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4283       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4284       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4285 #include "clang/Driver/Options.inc"
4286 #undef PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING
4287 
4288   bool Generate_dM = isStrictlyPreprocessorAction(Action) && !Opts.ShowCPP;
4289   if (Generate_dM)
4290     GenerateArg(Args, OPT_dM, SA);
4291   if (!Generate_dM && Opts.ShowMacros)
4292     GenerateArg(Args, OPT_dD, SA);
4293   if (Opts.DirectivesOnly)
4294     GenerateArg(Args, OPT_fdirectives_only, SA);
4295 }
4296 
4297 static bool ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
4298                                         ArgList &Args, DiagnosticsEngine &Diags,
4299                                         frontend::ActionKind Action) {
4300   unsigned NumErrorsBefore = Diags.getNumErrors();
4301 
4302   PreprocessorOutputOptions &PreprocessorOutputOpts = Opts;
4303 
4304 #define PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING(                           \
4305     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4306     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4307     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4308     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4309   PARSE_OPTION_WITH_MARSHALLING(                                               \
4310       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4311       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4312 #include "clang/Driver/Options.inc"
4313 #undef PREPROCESSOR_OUTPUT_OPTION_WITH_MARSHALLING
4314 
4315   Opts.ShowCPP = isStrictlyPreprocessorAction(Action) && !Args.hasArg(OPT_dM);
4316   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
4317   Opts.DirectivesOnly = Args.hasArg(OPT_fdirectives_only);
4318 
4319   return Diags.getNumErrors() == NumErrorsBefore;
4320 }
4321 
4322 static void GenerateTargetArgs(const TargetOptions &Opts,
4323                                SmallVectorImpl<const char *> &Args,
4324                                CompilerInvocation::StringAllocator SA) {
4325   const TargetOptions *TargetOpts = &Opts;
4326 #define TARGET_OPTION_WITH_MARSHALLING(                                        \
4327     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4328     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4329     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4330     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4331   GENERATE_OPTION_WITH_MARSHALLING(                                            \
4332       Args, SA, KIND, FLAGS, SPELLING, ALWAYS_EMIT, KEYPATH, DEFAULT_VALUE,    \
4333       IMPLIED_CHECK, IMPLIED_VALUE, DENORMALIZER, EXTRACTOR, TABLE_INDEX)
4334 #include "clang/Driver/Options.inc"
4335 #undef TARGET_OPTION_WITH_MARSHALLING
4336 
4337   if (!Opts.SDKVersion.empty())
4338     GenerateArg(Args, OPT_target_sdk_version_EQ, Opts.SDKVersion.getAsString(),
4339                 SA);
4340   if (!Opts.DarwinTargetVariantSDKVersion.empty())
4341     GenerateArg(Args, OPT_darwin_target_variant_sdk_version_EQ,
4342                 Opts.DarwinTargetVariantSDKVersion.getAsString(), SA);
4343 }
4344 
4345 static bool ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
4346                             DiagnosticsEngine &Diags) {
4347   unsigned NumErrorsBefore = Diags.getNumErrors();
4348 
4349   TargetOptions *TargetOpts = &Opts;
4350 
4351 #define TARGET_OPTION_WITH_MARSHALLING(                                        \
4352     PREFIX_TYPE, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,        \
4353     HELPTEXT, METAVAR, VALUES, SPELLING, SHOULD_PARSE, ALWAYS_EMIT, KEYPATH,   \
4354     DEFAULT_VALUE, IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, DENORMALIZER,     \
4355     MERGER, EXTRACTOR, TABLE_INDEX)                                            \
4356   PARSE_OPTION_WITH_MARSHALLING(                                               \
4357       Args, Diags, ID, FLAGS, PARAM, SHOULD_PARSE, KEYPATH, DEFAULT_VALUE,     \
4358       IMPLIED_CHECK, IMPLIED_VALUE, NORMALIZER, MERGER, TABLE_INDEX)
4359 #include "clang/Driver/Options.inc"
4360 #undef TARGET_OPTION_WITH_MARSHALLING
4361 
4362   if (Arg *A = Args.getLastArg(options::OPT_target_sdk_version_EQ)) {
4363     llvm::VersionTuple Version;
4364     if (Version.tryParse(A->getValue()))
4365       Diags.Report(diag::err_drv_invalid_value)
4366           << A->getAsString(Args) << A->getValue();
4367     else
4368       Opts.SDKVersion = Version;
4369   }
4370   if (Arg *A =
4371           Args.getLastArg(options::OPT_darwin_target_variant_sdk_version_EQ)) {
4372     llvm::VersionTuple Version;
4373     if (Version.tryParse(A->getValue()))
4374       Diags.Report(diag::err_drv_invalid_value)
4375           << A->getAsString(Args) << A->getValue();
4376     else
4377       Opts.DarwinTargetVariantSDKVersion = Version;
4378   }
4379 
4380   return Diags.getNumErrors() == NumErrorsBefore;
4381 }
4382 
4383 bool CompilerInvocation::CreateFromArgsImpl(
4384     CompilerInvocation &Res, ArrayRef<const char *> CommandLineArgs,
4385     DiagnosticsEngine &Diags, const char *Argv0) {
4386   unsigned NumErrorsBefore = Diags.getNumErrors();
4387 
4388   // Parse the arguments.
4389   const OptTable &Opts = getDriverOptTable();
4390   const unsigned IncludedFlagsBitmask = options::CC1Option;
4391   unsigned MissingArgIndex, MissingArgCount;
4392   InputArgList Args = Opts.ParseArgs(CommandLineArgs, MissingArgIndex,
4393                                      MissingArgCount, IncludedFlagsBitmask);
4394   LangOptions &LangOpts = *Res.getLangOpts();
4395 
4396   // Check for missing argument error.
4397   if (MissingArgCount)
4398     Diags.Report(diag::err_drv_missing_argument)
4399         << Args.getArgString(MissingArgIndex) << MissingArgCount;
4400 
4401   // Issue errors on unknown arguments.
4402   for (const auto *A : Args.filtered(OPT_UNKNOWN)) {
4403     auto ArgString = A->getAsString(Args);
4404     std::string Nearest;
4405     if (Opts.findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
4406       Diags.Report(diag::err_drv_unknown_argument) << ArgString;
4407     else
4408       Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
4409           << ArgString << Nearest;
4410   }
4411 
4412   ParseFileSystemArgs(Res.getFileSystemOpts(), Args, Diags);
4413   ParseMigratorArgs(Res.getMigratorOpts(), Args, Diags);
4414   ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
4415   ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
4416                       /*DefaultDiagColor=*/false);
4417   ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags, LangOpts.IsHeaderFile);
4418   // FIXME: We shouldn't have to pass the DashX option around here
4419   InputKind DashX = Res.getFrontendOpts().DashX;
4420   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
4421   llvm::Triple T(Res.getTargetOpts().Triple);
4422   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args, Diags,
4423                         Res.getFileSystemOpts().WorkingDir);
4424 
4425   ParseLangArgs(LangOpts, Args, DashX, T, Res.getPreprocessorOpts().Includes,
4426                 Diags);
4427   if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
4428     LangOpts.ObjCExceptions = 1;
4429 
4430   for (auto Warning : Res.getDiagnosticOpts().Warnings) {
4431     if (Warning == "misexpect" &&
4432         !Diags.isIgnored(diag::warn_profile_data_misexpect, SourceLocation())) {
4433       Res.getCodeGenOpts().MisExpect = true;
4434     }
4435   }
4436 
4437   if (LangOpts.CUDA) {
4438     // During CUDA device-side compilation, the aux triple is the
4439     // triple used for host compilation.
4440     if (LangOpts.CUDAIsDevice)
4441       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
4442   }
4443 
4444   // Set the triple of the host for OpenMP device compile.
4445   if (LangOpts.OpenMPIsDevice)
4446     Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
4447 
4448   ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags, T,
4449                    Res.getFrontendOpts().OutputFile, LangOpts);
4450 
4451   // FIXME: Override value name discarding when asan or msan is used because the
4452   // backend passes depend on the name of the alloca in order to print out
4453   // names.
4454   Res.getCodeGenOpts().DiscardValueNames &=
4455       !LangOpts.Sanitize.has(SanitizerKind::Address) &&
4456       !LangOpts.Sanitize.has(SanitizerKind::KernelAddress) &&
4457       !LangOpts.Sanitize.has(SanitizerKind::Memory) &&
4458       !LangOpts.Sanitize.has(SanitizerKind::KernelMemory);
4459 
4460   ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, Diags,
4461                         Res.getFrontendOpts().ProgramAction,
4462                         Res.getFrontendOpts());
4463   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args, Diags,
4464                               Res.getFrontendOpts().ProgramAction);
4465 
4466   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args, Diags,
4467                             Res.getFrontendOpts().ProgramAction,
4468                             Res.getPreprocessorOutputOpts().ShowLineMarkers);
4469   if (!Res.getDependencyOutputOpts().OutputFile.empty() &&
4470       Res.getDependencyOutputOpts().Targets.empty())
4471     Diags.Report(diag::err_fe_dependency_file_requires_MT);
4472 
4473   // If sanitizer is enabled, disable OPT_ffine_grained_bitfield_accesses.
4474   if (Res.getCodeGenOpts().FineGrainedBitfieldAccesses &&
4475       !Res.getLangOpts()->Sanitize.empty()) {
4476     Res.getCodeGenOpts().FineGrainedBitfieldAccesses = false;
4477     Diags.Report(diag::warn_drv_fine_grained_bitfield_accesses_ignored);
4478   }
4479 
4480   // Store the command-line for using in the CodeView backend.
4481   Res.getCodeGenOpts().Argv0 = Argv0;
4482   append_range(Res.getCodeGenOpts().CommandLineArgs, CommandLineArgs);
4483 
4484   FixupInvocation(Res, Diags, Args, DashX);
4485 
4486   return Diags.getNumErrors() == NumErrorsBefore;
4487 }
4488 
4489 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Invocation,
4490                                         ArrayRef<const char *> CommandLineArgs,
4491                                         DiagnosticsEngine &Diags,
4492                                         const char *Argv0) {
4493   CompilerInvocation DummyInvocation;
4494 
4495   return RoundTrip(
4496       [](CompilerInvocation &Invocation, ArrayRef<const char *> CommandLineArgs,
4497          DiagnosticsEngine &Diags, const char *Argv0) {
4498         return CreateFromArgsImpl(Invocation, CommandLineArgs, Diags, Argv0);
4499       },
4500       [](CompilerInvocation &Invocation, SmallVectorImpl<const char *> &Args,
4501          StringAllocator SA) { Invocation.generateCC1CommandLine(Args, SA); },
4502       Invocation, DummyInvocation, CommandLineArgs, Diags, Argv0);
4503 }
4504 
4505 std::string CompilerInvocation::getModuleHash() const {
4506   // FIXME: Consider using SHA1 instead of MD5.
4507   llvm::HashBuilder<llvm::MD5, llvm::support::endianness::native> HBuilder;
4508 
4509   // Note: For QoI reasons, the things we use as a hash here should all be
4510   // dumped via the -module-info flag.
4511 
4512   // Start the signature with the compiler version.
4513   HBuilder.add(getClangFullRepositoryVersion());
4514 
4515   // Also include the serialization version, in case LLVM_APPEND_VC_REV is off
4516   // and getClangFullRepositoryVersion() doesn't include git revision.
4517   HBuilder.add(serialization::VERSION_MAJOR, serialization::VERSION_MINOR);
4518 
4519   // Extend the signature with the language options
4520 #define LANGOPT(Name, Bits, Default, Description) HBuilder.add(LangOpts->Name);
4521 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description)                   \
4522   HBuilder.add(static_cast<unsigned>(LangOpts->get##Name()));
4523 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
4524 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
4525 #include "clang/Basic/LangOptions.def"
4526 
4527   HBuilder.addRange(LangOpts->ModuleFeatures);
4528 
4529   HBuilder.add(LangOpts->ObjCRuntime);
4530   HBuilder.addRange(LangOpts->CommentOpts.BlockCommandNames);
4531 
4532   // Extend the signature with the target options.
4533   HBuilder.add(TargetOpts->Triple, TargetOpts->CPU, TargetOpts->TuneCPU,
4534                TargetOpts->ABI);
4535   HBuilder.addRange(TargetOpts->FeaturesAsWritten);
4536 
4537   // Extend the signature with preprocessor options.
4538   const PreprocessorOptions &ppOpts = getPreprocessorOpts();
4539   HBuilder.add(ppOpts.UsePredefines, ppOpts.DetailedRecord);
4540 
4541   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
4542   for (const auto &Macro : getPreprocessorOpts().Macros) {
4543     // If we're supposed to ignore this macro for the purposes of modules,
4544     // don't put it into the hash.
4545     if (!hsOpts.ModulesIgnoreMacros.empty()) {
4546       // Check whether we're ignoring this macro.
4547       StringRef MacroDef = Macro.first;
4548       if (hsOpts.ModulesIgnoreMacros.count(
4549               llvm::CachedHashString(MacroDef.split('=').first)))
4550         continue;
4551     }
4552 
4553     HBuilder.add(Macro);
4554   }
4555 
4556   // Extend the signature with the sysroot and other header search options.
4557   HBuilder.add(hsOpts.Sysroot, hsOpts.ModuleFormat, hsOpts.UseDebugInfo,
4558                hsOpts.UseBuiltinIncludes, hsOpts.UseStandardSystemIncludes,
4559                hsOpts.UseStandardCXXIncludes, hsOpts.UseLibcxx,
4560                hsOpts.ModulesValidateDiagnosticOptions);
4561   HBuilder.add(hsOpts.ResourceDir);
4562 
4563   if (hsOpts.ModulesStrictContextHash) {
4564     HBuilder.addRange(hsOpts.SystemHeaderPrefixes);
4565     HBuilder.addRange(hsOpts.UserEntries);
4566 
4567     const DiagnosticOptions &diagOpts = getDiagnosticOpts();
4568 #define DIAGOPT(Name, Bits, Default) HBuilder.add(diagOpts.Name);
4569 #define ENUM_DIAGOPT(Name, Type, Bits, Default)                                \
4570   HBuilder.add(diagOpts.get##Name());
4571 #include "clang/Basic/DiagnosticOptions.def"
4572 #undef DIAGOPT
4573 #undef ENUM_DIAGOPT
4574   }
4575 
4576   // Extend the signature with the user build path.
4577   HBuilder.add(hsOpts.ModuleUserBuildPath);
4578 
4579   // Extend the signature with the module file extensions.
4580   for (const auto &ext : getFrontendOpts().ModuleFileExtensions)
4581     ext->hashExtension(HBuilder);
4582 
4583   // When compiling with -gmodules, also hash -fdebug-prefix-map as it
4584   // affects the debug info in the PCM.
4585   if (getCodeGenOpts().DebugTypeExtRefs)
4586     HBuilder.addRange(getCodeGenOpts().DebugPrefixMap);
4587 
4588   // Extend the signature with the enabled sanitizers, if at least one is
4589   // enabled. Sanitizers which cannot affect AST generation aren't hashed.
4590   SanitizerSet SanHash = LangOpts->Sanitize;
4591   SanHash.clear(getPPTransparentSanitizers());
4592   if (!SanHash.empty())
4593     HBuilder.add(SanHash.Mask);
4594 
4595   llvm::MD5::MD5Result Result;
4596   HBuilder.getHasher().final(Result);
4597   uint64_t Hash = Result.high() ^ Result.low();
4598   return toString(llvm::APInt(64, Hash), 36, /*Signed=*/false);
4599 }
4600 
4601 void CompilerInvocation::generateCC1CommandLine(
4602     SmallVectorImpl<const char *> &Args, StringAllocator SA) const {
4603   llvm::Triple T(TargetOpts->Triple);
4604 
4605   GenerateFileSystemArgs(FileSystemOpts, Args, SA);
4606   GenerateMigratorArgs(MigratorOpts, Args, SA);
4607   GenerateAnalyzerArgs(*AnalyzerOpts, Args, SA);
4608   GenerateDiagnosticArgs(*DiagnosticOpts, Args, SA, false);
4609   GenerateFrontendArgs(FrontendOpts, Args, SA, LangOpts->IsHeaderFile);
4610   GenerateTargetArgs(*TargetOpts, Args, SA);
4611   GenerateHeaderSearchArgs(*HeaderSearchOpts, Args, SA);
4612   GenerateLangArgs(*LangOpts, Args, SA, T, FrontendOpts.DashX);
4613   GenerateCodeGenArgs(CodeGenOpts, Args, SA, T, FrontendOpts.OutputFile,
4614                       &*LangOpts);
4615   GeneratePreprocessorArgs(*PreprocessorOpts, Args, SA, *LangOpts, FrontendOpts,
4616                            CodeGenOpts);
4617   GeneratePreprocessorOutputArgs(PreprocessorOutputOpts, Args, SA,
4618                                  FrontendOpts.ProgramAction);
4619   GenerateDependencyOutputArgs(DependencyOutputOpts, Args, SA);
4620 }
4621 
4622 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
4623 clang::createVFSFromCompilerInvocation(const CompilerInvocation &CI,
4624                                        DiagnosticsEngine &Diags) {
4625   return createVFSFromCompilerInvocation(CI, Diags,
4626                                          llvm::vfs::getRealFileSystem());
4627 }
4628 
4629 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
4630 clang::createVFSFromCompilerInvocation(
4631     const CompilerInvocation &CI, DiagnosticsEngine &Diags,
4632     IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
4633   if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
4634     return BaseFS;
4635 
4636   IntrusiveRefCntPtr<llvm::vfs::FileSystem> Result = BaseFS;
4637   // earlier vfs files are on the bottom
4638   for (const auto &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
4639     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
4640         Result->getBufferForFile(File);
4641     if (!Buffer) {
4642       Diags.Report(diag::err_missing_vfs_overlay_file) << File;
4643       continue;
4644     }
4645 
4646     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getVFSFromYAML(
4647         std::move(Buffer.get()), /*DiagHandler*/ nullptr, File,
4648         /*DiagContext*/ nullptr, Result);
4649     if (!FS) {
4650       Diags.Report(diag::err_invalid_vfs_overlay) << File;
4651       continue;
4652     }
4653 
4654     Result = FS;
4655   }
4656   return Result;
4657 }
4658