xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 2e7ab55e657fff6eecd8e46f2852af4ef78e1356)
1 //===- CompilerInvocation.cpp ---------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "TestModuleFileExtension.h"
12 #include "clang/Basic/Builtins.h"
13 #include "clang/Basic/CharInfo.h"
14 #include "clang/Basic/CommentOptions.h"
15 #include "clang/Basic/DebugInfoOptions.h"
16 #include "clang/Basic/Diagnostic.h"
17 #include "clang/Basic/DiagnosticOptions.h"
18 #include "clang/Basic/FileSystemOptions.h"
19 #include "clang/Basic/LLVM.h"
20 #include "clang/Basic/LangOptions.h"
21 #include "clang/Basic/ObjCRuntime.h"
22 #include "clang/Basic/Sanitizers.h"
23 #include "clang/Basic/SourceLocation.h"
24 #include "clang/Basic/TargetOptions.h"
25 #include "clang/Basic/Version.h"
26 #include "clang/Basic/Visibility.h"
27 #include "clang/Basic/XRayInstr.h"
28 #include "clang/Config/config.h"
29 #include "clang/Driver/DriverDiagnostic.h"
30 #include "clang/Driver/Options.h"
31 #include "clang/Frontend/CodeGenOptions.h"
32 #include "clang/Frontend/CommandLineSourceLoc.h"
33 #include "clang/Frontend/DependencyOutputOptions.h"
34 #include "clang/Frontend/FrontendDiagnostic.h"
35 #include "clang/Frontend/FrontendOptions.h"
36 #include "clang/Frontend/LangStandard.h"
37 #include "clang/Frontend/MigratorOptions.h"
38 #include "clang/Frontend/PreprocessorOutputOptions.h"
39 #include "clang/Frontend/Utils.h"
40 #include "clang/Lex/HeaderSearchOptions.h"
41 #include "clang/Lex/PreprocessorOptions.h"
42 #include "clang/Sema/CodeCompleteOptions.h"
43 #include "clang/Serialization/ModuleFileExtension.h"
44 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
45 #include "llvm/ADT/APInt.h"
46 #include "llvm/ADT/ArrayRef.h"
47 #include "llvm/ADT/CachedHashString.h"
48 #include "llvm/ADT/Hashing.h"
49 #include "llvm/ADT/None.h"
50 #include "llvm/ADT/Optional.h"
51 #include "llvm/ADT/SmallString.h"
52 #include "llvm/ADT/SmallVector.h"
53 #include "llvm/ADT/StringRef.h"
54 #include "llvm/ADT/StringSwitch.h"
55 #include "llvm/ADT/Triple.h"
56 #include "llvm/ADT/Twine.h"
57 #include "llvm/IR/DebugInfoMetadata.h"
58 #include "llvm/Linker/Linker.h"
59 #include "llvm/MC/MCTargetOptions.h"
60 #include "llvm/Option/Arg.h"
61 #include "llvm/Option/ArgList.h"
62 #include "llvm/Option/OptSpecifier.h"
63 #include "llvm/Option/OptTable.h"
64 #include "llvm/Option/Option.h"
65 #include "llvm/ProfileData/InstrProfReader.h"
66 #include "llvm/Support/CodeGen.h"
67 #include "llvm/Support/Compiler.h"
68 #include "llvm/Support/Error.h"
69 #include "llvm/Support/ErrorHandling.h"
70 #include "llvm/Support/ErrorOr.h"
71 #include "llvm/Support/FileSystem.h"
72 #include "llvm/Support/Host.h"
73 #include "llvm/Support/MathExtras.h"
74 #include "llvm/Support/MemoryBuffer.h"
75 #include "llvm/Support/Path.h"
76 #include "llvm/Support/Process.h"
77 #include "llvm/Support/Regex.h"
78 #include "llvm/Support/VersionTuple.h"
79 #include "llvm/Support/VirtualFileSystem.h"
80 #include "llvm/Support/raw_ostream.h"
81 #include "llvm/Target/TargetOptions.h"
82 #include <algorithm>
83 #include <atomic>
84 #include <cassert>
85 #include <cstddef>
86 #include <cstring>
87 #include <memory>
88 #include <string>
89 #include <tuple>
90 #include <utility>
91 #include <vector>
92 
93 using namespace clang;
94 using namespace driver;
95 using namespace options;
96 using namespace llvm::opt;
97 
98 //===----------------------------------------------------------------------===//
99 // Initialization.
100 //===----------------------------------------------------------------------===//
101 
102 CompilerInvocationBase::CompilerInvocationBase()
103     : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
104       DiagnosticOpts(new DiagnosticOptions()),
105       HeaderSearchOpts(new HeaderSearchOptions()),
106       PreprocessorOpts(new PreprocessorOptions()) {}
107 
108 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
109     : LangOpts(new LangOptions(*X.getLangOpts())),
110       TargetOpts(new TargetOptions(X.getTargetOpts())),
111       DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
112       HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
113       PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
114 
115 CompilerInvocationBase::~CompilerInvocationBase() = default;
116 
117 //===----------------------------------------------------------------------===//
118 // Deserialization (from args)
119 //===----------------------------------------------------------------------===//
120 
121 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
122                                      DiagnosticsEngine &Diags) {
123   unsigned DefaultOpt = llvm::CodeGenOpt::None;
124   if (IK.getLanguage() == InputKind::OpenCL && !Args.hasArg(OPT_cl_opt_disable))
125     DefaultOpt = llvm::CodeGenOpt::Default;
126 
127   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
128     if (A->getOption().matches(options::OPT_O0))
129       return llvm::CodeGenOpt::None;
130 
131     if (A->getOption().matches(options::OPT_Ofast))
132       return llvm::CodeGenOpt::Aggressive;
133 
134     assert(A->getOption().matches(options::OPT_O));
135 
136     StringRef S(A->getValue());
137     if (S == "s" || S == "z" || S.empty())
138       return llvm::CodeGenOpt::Default;
139 
140     if (S == "g")
141       return llvm::CodeGenOpt::Less;
142 
143     return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
144   }
145 
146   return DefaultOpt;
147 }
148 
149 static unsigned getOptimizationLevelSize(ArgList &Args) {
150   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
151     if (A->getOption().matches(options::OPT_O)) {
152       switch (A->getValue()[0]) {
153       default:
154         return 0;
155       case 's':
156         return 1;
157       case 'z':
158         return 2;
159       }
160     }
161   }
162   return 0;
163 }
164 
165 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
166                               OptSpecifier GroupWithValue,
167                               std::vector<std::string> &Diagnostics) {
168   for (auto *A : Args.filtered(Group)) {
169     if (A->getOption().getKind() == Option::FlagClass) {
170       // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
171       // its name (minus the "W" or "R" at the beginning) to the warning list.
172       Diagnostics.push_back(A->getOption().getName().drop_front(1));
173     } else if (A->getOption().matches(GroupWithValue)) {
174       // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
175       Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
176     } else {
177       // Otherwise, add its value (for OPT_W_Joined and similar).
178       for (const auto *Arg : A->getValues())
179         Diagnostics.emplace_back(Arg);
180     }
181   }
182 }
183 
184 // Parse the Static Analyzer configuration. If \p Diags is set to nullptr,
185 // it won't verify the input.
186 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
187                                  DiagnosticsEngine *Diags);
188 
189 static void getAllNoBuiltinFuncValues(ArgList &Args,
190                                       std::vector<std::string> &Funcs) {
191   SmallVector<const char *, 8> Values;
192   for (const auto &Arg : Args) {
193     const Option &O = Arg->getOption();
194     if (O.matches(options::OPT_fno_builtin_)) {
195       const char *FuncName = Arg->getValue();
196       if (Builtin::Context::isBuiltinFunc(FuncName))
197         Values.push_back(FuncName);
198     }
199   }
200   Funcs.insert(Funcs.end(), Values.begin(), Values.end());
201 }
202 
203 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
204                               DiagnosticsEngine &Diags) {
205   bool Success = true;
206   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
207     StringRef Name = A->getValue();
208     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
209 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
210       .Case(CMDFLAG, NAME##Model)
211 #include "clang/StaticAnalyzer/Core/Analyses.def"
212       .Default(NumStores);
213     if (Value == NumStores) {
214       Diags.Report(diag::err_drv_invalid_value)
215         << A->getAsString(Args) << Name;
216       Success = false;
217     } else {
218       Opts.AnalysisStoreOpt = Value;
219     }
220   }
221 
222   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
223     StringRef Name = A->getValue();
224     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
225 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
226       .Case(CMDFLAG, NAME##Model)
227 #include "clang/StaticAnalyzer/Core/Analyses.def"
228       .Default(NumConstraints);
229     if (Value == NumConstraints) {
230       Diags.Report(diag::err_drv_invalid_value)
231         << A->getAsString(Args) << Name;
232       Success = false;
233     } else {
234       Opts.AnalysisConstraintsOpt = Value;
235     }
236   }
237 
238   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
239     StringRef Name = A->getValue();
240     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
241 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
242       .Case(CMDFLAG, PD_##NAME)
243 #include "clang/StaticAnalyzer/Core/Analyses.def"
244       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
245     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
246       Diags.Report(diag::err_drv_invalid_value)
247         << A->getAsString(Args) << Name;
248       Success = false;
249     } else {
250       Opts.AnalysisDiagOpt = Value;
251     }
252   }
253 
254   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
255     StringRef Name = A->getValue();
256     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
257 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
258       .Case(CMDFLAG, NAME)
259 #include "clang/StaticAnalyzer/Core/Analyses.def"
260       .Default(NumPurgeModes);
261     if (Value == NumPurgeModes) {
262       Diags.Report(diag::err_drv_invalid_value)
263         << A->getAsString(Args) << Name;
264       Success = false;
265     } else {
266       Opts.AnalysisPurgeOpt = Value;
267     }
268   }
269 
270   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
271     StringRef Name = A->getValue();
272     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
273 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
274       .Case(CMDFLAG, NAME)
275 #include "clang/StaticAnalyzer/Core/Analyses.def"
276       .Default(NumInliningModes);
277     if (Value == NumInliningModes) {
278       Diags.Report(diag::err_drv_invalid_value)
279         << A->getAsString(Args) << Name;
280       Success = false;
281     } else {
282       Opts.InliningMode = Value;
283     }
284   }
285 
286   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
287   Opts.ShowConfigOptionsList = Args.hasArg(OPT_analyzer_config_help);
288   Opts.ShowEnabledCheckerList = Args.hasArg(OPT_analyzer_list_enabled_checkers);
289   Opts.ShouldEmitErrorsOnInvalidConfigValue =
290       /* negated */!llvm::StringSwitch<bool>(
291                    Args.getLastArgValue(OPT_analyzer_config_compatibility_mode))
292         .Case("true", true)
293         .Case("false", false)
294         .Default(false);
295   Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
296 
297   Opts.visualizeExplodedGraphWithGraphViz =
298     Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
299   Opts.DumpExplodedGraphTo = Args.getLastArgValue(OPT_analyzer_dump_egraph);
300   Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
301   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
302   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
303   Opts.AnalyzeNestedBlocks =
304     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
305   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
306   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
307   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
308   Opts.maxBlockVisitOnPath =
309       getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
310   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
311   Opts.InlineMaxStackDepth =
312       getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
313                          Opts.InlineMaxStackDepth, Diags);
314 
315   Opts.CheckersControlList.clear();
316   for (const Arg *A :
317        Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
318     A->claim();
319     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
320     // We can have a list of comma separated checker names, e.g:
321     // '-analyzer-checker=cocoa,unix'
322     StringRef checkerList = A->getValue();
323     SmallVector<StringRef, 4> checkers;
324     checkerList.split(checkers, ",");
325     for (auto checker : checkers)
326       Opts.CheckersControlList.emplace_back(checker, enable);
327   }
328 
329   // Go through the analyzer configuration options.
330   for (const auto *A : Args.filtered(OPT_analyzer_config)) {
331 
332     // We can have a list of comma separated config names, e.g:
333     // '-analyzer-config key1=val1,key2=val2'
334     StringRef configList = A->getValue();
335     SmallVector<StringRef, 4> configVals;
336     configList.split(configVals, ",");
337     for (const auto &configVal : configVals) {
338       StringRef key, val;
339       std::tie(key, val) = configVal.split("=");
340       if (val.empty()) {
341         Diags.Report(SourceLocation(),
342                      diag::err_analyzer_config_no_value) << configVal;
343         Success = false;
344         break;
345       }
346       if (val.find('=') != StringRef::npos) {
347         Diags.Report(SourceLocation(),
348                      diag::err_analyzer_config_multiple_values)
349           << configVal;
350         Success = false;
351         break;
352       }
353 
354       // TODO: Check checker options too, possibly in CheckerRegistry.
355       // Leave unknown non-checker configs unclaimed.
356       if (!key.contains(":") && Opts.isUnknownAnalyzerConfig(key)) {
357         if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
358           Diags.Report(diag::err_analyzer_config_unknown) << key;
359         continue;
360       }
361 
362       A->claim();
363       Opts.Config[key] = val;
364     }
365   }
366 
367   if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
368     parseAnalyzerConfigs(Opts, &Diags);
369   else
370     parseAnalyzerConfigs(Opts, nullptr);
371 
372   llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
373   for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
374     if (i != 0)
375       os << " ";
376     os << Args.getArgString(i);
377   }
378   os.flush();
379 
380   return Success;
381 }
382 
383 static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
384                                  StringRef OptionName, StringRef DefaultVal) {
385   return Config.insert({OptionName, DefaultVal}).first->second;
386 }
387 
388 static void initOption(AnalyzerOptions::ConfigTable &Config,
389                        DiagnosticsEngine *Diags,
390                        StringRef &OptionField, StringRef Name,
391                        StringRef DefaultVal) {
392   // String options may be known to invalid (e.g. if the expected string is a
393   // file name, but the file does not exist), those will have to be checked in
394   // parseConfigs.
395   OptionField = getStringOption(Config, Name, DefaultVal);
396 }
397 
398 static void initOption(AnalyzerOptions::ConfigTable &Config,
399                        DiagnosticsEngine *Diags,
400                        bool &OptionField, StringRef Name, bool DefaultVal) {
401   auto PossiblyInvalidVal = llvm::StringSwitch<Optional<bool>>(
402                  getStringOption(Config, Name, (DefaultVal ? "true" : "false")))
403       .Case("true", true)
404       .Case("false", false)
405       .Default(None);
406 
407   if (!PossiblyInvalidVal) {
408     if (Diags)
409       Diags->Report(diag::err_analyzer_config_invalid_input)
410         << Name << "a boolean";
411     else
412       OptionField = DefaultVal;
413   } else
414     OptionField = PossiblyInvalidVal.getValue();
415 }
416 
417 static void initOption(AnalyzerOptions::ConfigTable &Config,
418                        DiagnosticsEngine *Diags,
419                        unsigned &OptionField, StringRef Name,
420                        unsigned DefaultVal) {
421 
422   OptionField = DefaultVal;
423   bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
424                      .getAsInteger(10, OptionField);
425   if (Diags && HasFailed)
426     Diags->Report(diag::err_analyzer_config_invalid_input)
427       << Name << "an unsigned";
428 }
429 
430 static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
431                                  DiagnosticsEngine *Diags) {
432   // TODO: There's no need to store the entire configtable, it'd be plenty
433   // enough tostore checker options.
434 
435 #define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL)                \
436   initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);
437 
438 #define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC,        \
439                                            SHALLOW_VAL, DEEP_VAL)              \
440   switch (AnOpts.getUserMode()) {                                              \
441   case UMK_Shallow:                                                            \
442     initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, SHALLOW_VAL);       \
443     break;                                                                     \
444   case UMK_Deep:                                                               \
445     initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEEP_VAL);          \
446     break;                                                                     \
447   }                                                                            \
448 
449 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
450 #undef ANALYZER_OPTION
451 #undef ANALYZER_OPTION_DEPENDS_ON_USER_MODE
452 
453   // At this point, AnalyzerOptions is configured. Let's validate some options.
454 
455   if (!Diags)
456     return;
457 
458   if (!AnOpts.CTUDir.empty() && !llvm::sys::fs::is_directory(AnOpts.CTUDir))
459     Diags->Report(diag::err_analyzer_config_invalid_input) << "ctu-dir"
460                                                            << "a filename";
461 
462   if (!AnOpts.ModelPath.empty() &&
463       !llvm::sys::fs::is_directory(AnOpts.ModelPath))
464     Diags->Report(diag::err_analyzer_config_invalid_input) << "model-path"
465                                                            << "a filename";
466 }
467 
468 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
469   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
470   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
471   return true;
472 }
473 
474 static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
475   Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
476   Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
477 }
478 
479 static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
480   if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
481     StringRef Value = A->getValue();
482     if (Value == "small" || Value == "kernel" || Value == "medium" ||
483         Value == "large" || Value == "tiny")
484       return Value;
485     Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
486   }
487   return "default";
488 }
489 
490 static llvm::Reloc::Model getRelocModel(ArgList &Args,
491                                         DiagnosticsEngine &Diags) {
492   if (Arg *A = Args.getLastArg(OPT_mrelocation_model)) {
493     StringRef Value = A->getValue();
494     auto RM = llvm::StringSwitch<llvm::Optional<llvm::Reloc::Model>>(Value)
495                   .Case("static", llvm::Reloc::Static)
496                   .Case("pic", llvm::Reloc::PIC_)
497                   .Case("ropi", llvm::Reloc::ROPI)
498                   .Case("rwpi", llvm::Reloc::RWPI)
499                   .Case("ropi-rwpi", llvm::Reloc::ROPI_RWPI)
500                   .Case("dynamic-no-pic", llvm::Reloc::DynamicNoPIC)
501                   .Default(None);
502     if (RM.hasValue())
503       return *RM;
504     Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
505   }
506   return llvm::Reloc::PIC_;
507 }
508 
509 /// Create a new Regex instance out of the string value in \p RpassArg.
510 /// It returns a pointer to the newly generated Regex instance.
511 static std::shared_ptr<llvm::Regex>
512 GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
513                                 Arg *RpassArg) {
514   StringRef Val = RpassArg->getValue();
515   std::string RegexError;
516   std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
517   if (!Pattern->isValid(RegexError)) {
518     Diags.Report(diag::err_drv_optimization_remark_pattern)
519         << RegexError << RpassArg->getAsString(Args);
520     Pattern.reset();
521   }
522   return Pattern;
523 }
524 
525 static bool parseDiagnosticLevelMask(StringRef FlagName,
526                                      const std::vector<std::string> &Levels,
527                                      DiagnosticsEngine *Diags,
528                                      DiagnosticLevelMask &M) {
529   bool Success = true;
530   for (const auto &Level : Levels) {
531     DiagnosticLevelMask const PM =
532       llvm::StringSwitch<DiagnosticLevelMask>(Level)
533         .Case("note",    DiagnosticLevelMask::Note)
534         .Case("remark",  DiagnosticLevelMask::Remark)
535         .Case("warning", DiagnosticLevelMask::Warning)
536         .Case("error",   DiagnosticLevelMask::Error)
537         .Default(DiagnosticLevelMask::None);
538     if (PM == DiagnosticLevelMask::None) {
539       Success = false;
540       if (Diags)
541         Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
542     }
543     M = M | PM;
544   }
545   return Success;
546 }
547 
548 static void parseSanitizerKinds(StringRef FlagName,
549                                 const std::vector<std::string> &Sanitizers,
550                                 DiagnosticsEngine &Diags, SanitizerSet &S) {
551   for (const auto &Sanitizer : Sanitizers) {
552     SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
553     if (K == 0)
554       Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
555     else
556       S.set(K, true);
557   }
558 }
559 
560 static void parseXRayInstrumentationBundle(StringRef FlagName, StringRef Bundle,
561                                            ArgList &Args, DiagnosticsEngine &D,
562                                            XRayInstrSet &S) {
563   llvm::SmallVector<StringRef, 2> BundleParts;
564   llvm::SplitString(Bundle, BundleParts, ",");
565   for (const auto B : BundleParts) {
566     auto Mask = parseXRayInstrValue(B);
567     if (Mask == XRayInstrKind::None)
568       if (B != "none")
569         D.Report(diag::err_drv_invalid_value) << FlagName << Bundle;
570       else
571         S.Mask = Mask;
572     else if (Mask == XRayInstrKind::All)
573       S.Mask = Mask;
574     else
575       S.set(Mask, true);
576   }
577 }
578 
579 // Set the profile kind for fprofile-instrument.
580 static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
581                                DiagnosticsEngine &Diags) {
582   Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
583   if (A == nullptr)
584     return;
585   StringRef S = A->getValue();
586   unsigned I = llvm::StringSwitch<unsigned>(S)
587                    .Case("none", CodeGenOptions::ProfileNone)
588                    .Case("clang", CodeGenOptions::ProfileClangInstr)
589                    .Case("llvm", CodeGenOptions::ProfileIRInstr)
590                    .Default(~0U);
591   if (I == ~0U) {
592     Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
593                                                          << S;
594     return;
595   }
596   auto Instrumentor = static_cast<CodeGenOptions::ProfileInstrKind>(I);
597   Opts.setProfileInstr(Instrumentor);
598 }
599 
600 // Set the profile kind using fprofile-instrument-use-path.
601 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
602                                   const Twine &ProfileName) {
603   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
604   // In error, return silently and let Clang PGOUse report the error message.
605   if (auto E = ReaderOrErr.takeError()) {
606     llvm::consumeError(std::move(E));
607     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
608     return;
609   }
610   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
611     std::move(ReaderOrErr.get());
612   if (PGOReader->isIRLevelProfile())
613     Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
614   else
615     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
616 }
617 
618 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
619                              DiagnosticsEngine &Diags,
620                              const TargetOptions &TargetOpts,
621                              const FrontendOptions &FrontendOpts) {
622   bool Success = true;
623   llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
624 
625   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
626   // TODO: This could be done in Driver
627   unsigned MaxOptLevel = 3;
628   if (OptimizationLevel > MaxOptLevel) {
629     // If the optimization level is not supported, fall back on the default
630     // optimization
631     Diags.Report(diag::warn_drv_optimization_value)
632         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
633     OptimizationLevel = MaxOptLevel;
634   }
635   Opts.OptimizationLevel = OptimizationLevel;
636 
637   // At O0 we want to fully disable inlining outside of cases marked with
638   // 'alwaysinline' that are required for correctness.
639   Opts.setInlining((Opts.OptimizationLevel == 0)
640                        ? CodeGenOptions::OnlyAlwaysInlining
641                        : CodeGenOptions::NormalInlining);
642   // Explicit inlining flags can disable some or all inlining even at
643   // optimization levels above zero.
644   if (Arg *InlineArg = Args.getLastArg(
645           options::OPT_finline_functions, options::OPT_finline_hint_functions,
646           options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
647     if (Opts.OptimizationLevel > 0) {
648       const Option &InlineOpt = InlineArg->getOption();
649       if (InlineOpt.matches(options::OPT_finline_functions))
650         Opts.setInlining(CodeGenOptions::NormalInlining);
651       else if (InlineOpt.matches(options::OPT_finline_hint_functions))
652         Opts.setInlining(CodeGenOptions::OnlyHintInlining);
653       else
654         Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
655     }
656   }
657 
658   Opts.ExperimentalNewPassManager = Args.hasFlag(
659       OPT_fexperimental_new_pass_manager, OPT_fno_experimental_new_pass_manager,
660       /* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER);
661 
662   Opts.DebugPassManager =
663       Args.hasFlag(OPT_fdebug_pass_manager, OPT_fno_debug_pass_manager,
664                    /* Default */ false);
665 
666   if (Arg *A = Args.getLastArg(OPT_fveclib)) {
667     StringRef Name = A->getValue();
668     if (Name == "Accelerate")
669       Opts.setVecLib(CodeGenOptions::Accelerate);
670     else if (Name == "SVML")
671       Opts.setVecLib(CodeGenOptions::SVML);
672     else if (Name == "none")
673       Opts.setVecLib(CodeGenOptions::NoLibrary);
674     else
675       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
676   }
677 
678   if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
679     unsigned Val =
680         llvm::StringSwitch<unsigned>(A->getValue())
681             .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
682             .Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
683             .Case("limited", codegenoptions::LimitedDebugInfo)
684             .Case("standalone", codegenoptions::FullDebugInfo)
685             .Default(~0U);
686     if (Val == ~0U)
687       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
688                                                 << A->getValue();
689     else
690       Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
691   }
692   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
693     unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
694                        .Case("gdb", unsigned(llvm::DebuggerKind::GDB))
695                        .Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
696                        .Case("sce", unsigned(llvm::DebuggerKind::SCE))
697                        .Default(~0U);
698     if (Val == ~0U)
699       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
700                                                 << A->getValue();
701     else
702       Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
703   }
704   Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
705   Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
706   Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
707   Opts.CodeViewGHash = Args.hasArg(OPT_gcodeview_ghash);
708   Opts.MacroDebugInfo = Args.hasArg(OPT_debug_info_macro);
709   Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
710   Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
711   Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
712   Opts.SplitDwarfInlining = !Args.hasArg(OPT_fno_split_dwarf_inlining);
713 
714   if (Arg *A =
715           Args.getLastArg(OPT_enable_split_dwarf, OPT_enable_split_dwarf_EQ)) {
716     if (A->getOption().matches(options::OPT_enable_split_dwarf)) {
717       Opts.setSplitDwarfMode(CodeGenOptions::SplitFileFission);
718     } else {
719       StringRef Name = A->getValue();
720       if (Name == "single")
721         Opts.setSplitDwarfMode(CodeGenOptions::SingleFileFission);
722       else if (Name == "split")
723         Opts.setSplitDwarfMode(CodeGenOptions::SplitFileFission);
724       else
725         Diags.Report(diag::err_drv_invalid_value)
726             << A->getAsString(Args) << Name;
727     }
728   }
729 
730   Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
731   Opts.DebugExplicitImport = Args.hasArg(OPT_dwarf_explicit_import);
732   Opts.DebugFwdTemplateParams = Args.hasArg(OPT_debug_forward_template_params);
733   Opts.EmbedSource = Args.hasArg(OPT_gembed_source);
734 
735   for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
736     Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
737 
738   if (const Arg *A =
739           Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
740     Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
741 
742   Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
743   Opts.DisableLifetimeMarkers = Args.hasArg(OPT_disable_lifetimemarkers);
744   Opts.DisableO0ImplyOptNone = Args.hasArg(OPT_disable_O0_optnone);
745   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
746   Opts.IndirectTlsSegRefs = Args.hasArg(OPT_mno_tls_direct_seg_refs);
747   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
748   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
749     OPT_fuse_register_sized_bitfield_access);
750   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
751   Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
752   Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
753                            Args.hasArg(OPT_new_struct_path_tbaa);
754   Opts.FineGrainedBitfieldAccesses =
755       Args.hasFlag(OPT_ffine_grained_bitfield_accesses,
756                    OPT_fno_fine_grained_bitfield_accesses, false);
757   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
758   Opts.MergeAllConstants = Args.hasArg(OPT_fmerge_all_constants);
759   Opts.NoCommon = Args.hasArg(OPT_fno_common);
760   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
761   Opts.OptimizeSize = getOptimizationLevelSize(Args);
762   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
763                             Args.hasArg(OPT_ffreestanding));
764   if (Opts.SimplifyLibCalls)
765     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
766   Opts.UnrollLoops =
767       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
768                    (Opts.OptimizationLevel > 1));
769   Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
770 
771   Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
772   Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
773   Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
774   Opts.DebugInfoForProfiling = Args.hasFlag(
775       OPT_fdebug_info_for_profiling, OPT_fno_debug_info_for_profiling, false);
776   Opts.DebugNameTable = static_cast<unsigned>(
777       Args.hasArg(OPT_ggnu_pubnames)
778           ? llvm::DICompileUnit::DebugNameTableKind::GNU
779           : Args.hasArg(OPT_gpubnames)
780                 ? llvm::DICompileUnit::DebugNameTableKind::Default
781                 : llvm::DICompileUnit::DebugNameTableKind::None);
782   Opts.DebugRangesBaseAddress = Args.hasArg(OPT_fdebug_ranges_base_address);
783 
784   setPGOInstrumentor(Opts, Args, Diags);
785   Opts.InstrProfileOutput =
786       Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
787   Opts.ProfileInstrumentUsePath =
788       Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
789   if (!Opts.ProfileInstrumentUsePath.empty())
790     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
791   Opts.ProfileRemappingFile =
792       Args.getLastArgValue(OPT_fprofile_remapping_file_EQ);
793   if (!Opts.ProfileRemappingFile.empty() && !Opts.ExperimentalNewPassManager) {
794     Diags.Report(diag::err_drv_argument_only_allowed_with)
795       << Args.getLastArg(OPT_fprofile_remapping_file_EQ)->getAsString(Args)
796       << "-fexperimental-new-pass-manager";
797   }
798 
799   Opts.CoverageMapping =
800       Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
801   Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
802   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
803   Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
804   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
805   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
806   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
807   Opts.RegisterGlobalDtorsWithAtExit =
808       Args.hasArg(OPT_fregister_global_dtors_with_atexit);
809   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
810   Opts.CodeModel = TargetOpts.CodeModel;
811   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
812   Opts.DisableFPElim =
813       (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
814   Opts.DisableFree = Args.hasArg(OPT_disable_free);
815   Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
816   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
817   Opts.NoEscapingBlockTailCalls =
818       Args.hasArg(OPT_fno_escaping_block_tail_calls);
819   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
820   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable) ||
821                           Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
822                           Args.hasArg(OPT_cl_fast_relaxed_math);
823   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
824   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
825                        Args.hasArg(OPT_cl_finite_math_only) ||
826                        Args.hasArg(OPT_cl_fast_relaxed_math));
827   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
828                        Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
829                        Args.hasArg(OPT_cl_finite_math_only) ||
830                        Args.hasArg(OPT_cl_fast_relaxed_math));
831   Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
832                         Args.hasArg(OPT_cl_no_signed_zeros) ||
833                         Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
834                         Args.hasArg(OPT_cl_fast_relaxed_math));
835   Opts.Reassociate = Args.hasArg(OPT_mreassociate);
836   Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero) ||
837                      (Args.hasArg(OPT_fcuda_is_device) &&
838                       Args.hasArg(OPT_fcuda_flush_denormals_to_zero));
839   Opts.CorrectlyRoundedDivSqrt =
840       Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
841   Opts.UniformWGSize =
842       Args.hasArg(OPT_cl_uniform_work_group_size);
843   Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
844   Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
845   Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
846   Opts.StrictFloatCastOverflow =
847       !Args.hasArg(OPT_fno_strict_float_cast_overflow);
848 
849   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
850   Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
851   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
852   Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
853   Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
854   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
855   Opts.IncrementalLinkerCompatible =
856       Args.hasArg(OPT_mincremental_linker_compatible);
857   Opts.PIECopyRelocations =
858       Args.hasArg(OPT_mpie_copy_relocations);
859   Opts.NoPLT = Args.hasArg(OPT_fno_plt);
860   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
861   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
862   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
863   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
864   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
865   Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
866   Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
867   Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
868   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
869                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
870                       Args.hasArg(OPT_cl_fast_relaxed_math);
871   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
872   Opts.RelocationModel = getRelocModel(Args, Diags);
873   Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
874   if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
875     Diags.Report(diag::err_drv_invalid_value)
876         << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
877         << Opts.ThreadModel;
878   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
879   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
880 
881   Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
882                                        OPT_fno_function_sections, false);
883   Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
884                                    OPT_fno_data_sections, false);
885   Opts.StackSizeSection =
886       Args.hasFlag(OPT_fstack_size_section, OPT_fno_stack_size_section, false);
887   Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
888                                          OPT_fno_unique_section_names, true);
889 
890   Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
891 
892   Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
893 
894   Opts.NullPointerIsValid = Args.hasArg(OPT_fno_delete_null_pointer_checks);
895 
896   Opts.ProfileSampleAccurate = Args.hasArg(OPT_fprofile_sample_accurate);
897 
898   Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
899   Opts.PrepareForThinLTO = false;
900   if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
901     StringRef S = A->getValue();
902     if (S == "thin")
903       Opts.PrepareForThinLTO = true;
904     else if (S != "full")
905       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
906   }
907   Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
908   if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
909     if (IK.getLanguage() != InputKind::LLVM_IR)
910       Diags.Report(diag::err_drv_argument_only_allowed_with)
911           << A->getAsString(Args) << "-x ir";
912     Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
913   }
914   if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
915     Opts.SaveTempsFilePrefix =
916         llvm::StringSwitch<std::string>(A->getValue())
917             .Case("obj", FrontendOpts.OutputFile)
918             .Default(llvm::sys::path::filename(FrontendOpts.OutputFile).str());
919 
920   Opts.ThinLinkBitcodeFile = Args.getLastArgValue(OPT_fthin_link_bitcode_EQ);
921 
922   Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
923 
924   Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
925   Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
926 
927   Opts.PreferVectorWidth = Args.getLastArgValue(OPT_mprefer_vector_width_EQ);
928 
929   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
930   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
931 
932   Opts.ControlFlowGuard = Args.hasArg(OPT_cfguard);
933 
934   Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
935   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
936   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
937   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
938     Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
939     Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
940     Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
941     Opts.CoverageNoFunctionNamesInData =
942         Args.hasArg(OPT_coverage_no_function_names_in_data);
943     Opts.ProfileFilterFiles =
944         Args.getLastArgValue(OPT_fprofile_filter_files_EQ);
945     Opts.ProfileExcludeFiles =
946         Args.getLastArgValue(OPT_fprofile_exclude_files_EQ);
947     Opts.CoverageExitBlockBeforeBody =
948         Args.hasArg(OPT_coverage_exit_block_before_body);
949     if (Args.hasArg(OPT_coverage_version_EQ)) {
950       StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
951       if (CoverageVersion.size() != 4) {
952         Diags.Report(diag::err_drv_invalid_value)
953             << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
954             << CoverageVersion;
955       } else {
956         memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
957       }
958     }
959   }
960   // Handle -fembed-bitcode option.
961   if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
962     StringRef Name = A->getValue();
963     unsigned Model = llvm::StringSwitch<unsigned>(Name)
964         .Case("off", CodeGenOptions::Embed_Off)
965         .Case("all", CodeGenOptions::Embed_All)
966         .Case("bitcode", CodeGenOptions::Embed_Bitcode)
967         .Case("marker", CodeGenOptions::Embed_Marker)
968         .Default(~0U);
969     if (Model == ~0U) {
970       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
971       Success = false;
972     } else
973       Opts.setEmbedBitcode(
974           static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
975   }
976   // FIXME: For backend options that are not yet recorded as function
977   // attributes in the IR, keep track of them so we can embed them in a
978   // separate data section and use them when building the bitcode.
979   if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
980     for (const auto &A : Args) {
981       // Do not encode output and input.
982       if (A->getOption().getID() == options::OPT_o ||
983           A->getOption().getID() == options::OPT_INPUT ||
984           A->getOption().getID() == options::OPT_x ||
985           A->getOption().getID() == options::OPT_fembed_bitcode ||
986           (A->getOption().getGroup().isValid() &&
987            A->getOption().getGroup().getID() == options::OPT_W_Group))
988         continue;
989       ArgStringList ASL;
990       A->render(Args, ASL);
991       for (const auto &arg : ASL) {
992         StringRef ArgStr(arg);
993         Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
994         // using \00 to seperate each commandline options.
995         Opts.CmdArgs.push_back('\0');
996       }
997     }
998   }
999 
1000   Opts.PreserveVec3Type = Args.hasArg(OPT_fpreserve_vec3_type);
1001   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1002   Opts.InstrumentFunctionsAfterInlining =
1003       Args.hasArg(OPT_finstrument_functions_after_inlining);
1004   Opts.InstrumentFunctionEntryBare =
1005       Args.hasArg(OPT_finstrument_function_entry_bare);
1006 
1007   Opts.XRayInstrumentFunctions =
1008       Args.hasArg(OPT_fxray_instrument);
1009   Opts.XRayAlwaysEmitCustomEvents =
1010       Args.hasArg(OPT_fxray_always_emit_customevents);
1011   Opts.XRayAlwaysEmitTypedEvents =
1012       Args.hasArg(OPT_fxray_always_emit_typedevents);
1013   Opts.XRayInstructionThreshold =
1014       getLastArgIntValue(Args, OPT_fxray_instruction_threshold_EQ, 200, Diags);
1015 
1016   auto XRayInstrBundles =
1017       Args.getAllArgValues(OPT_fxray_instrumentation_bundle);
1018   if (XRayInstrBundles.empty())
1019     Opts.XRayInstrumentationBundle.Mask = XRayInstrKind::All;
1020   else
1021     for (const auto &A : XRayInstrBundles)
1022       parseXRayInstrumentationBundle("-fxray-instrumentation-bundle=", A, Args,
1023                                      Diags, Opts.XRayInstrumentationBundle);
1024 
1025   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1026   Opts.CallFEntry = Args.hasArg(OPT_mfentry);
1027   Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
1028 
1029   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
1030     StringRef Name = A->getValue();
1031     if (Name == "full") {
1032       Opts.CFProtectionReturn = 1;
1033       Opts.CFProtectionBranch = 1;
1034     } else if (Name == "return")
1035       Opts.CFProtectionReturn = 1;
1036     else if (Name == "branch")
1037       Opts.CFProtectionBranch = 1;
1038     else if (Name != "none") {
1039       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1040       Success = false;
1041     }
1042   }
1043 
1044   if (const Arg *A = Args.getLastArg(OPT_compress_debug_sections,
1045                                      OPT_compress_debug_sections_EQ)) {
1046     if (A->getOption().getID() == OPT_compress_debug_sections) {
1047       // TODO: be more clever about the compression type auto-detection
1048       Opts.setCompressDebugSections(llvm::DebugCompressionType::GNU);
1049     } else {
1050       auto DCT = llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
1051                      .Case("none", llvm::DebugCompressionType::None)
1052                      .Case("zlib", llvm::DebugCompressionType::Z)
1053                      .Case("zlib-gnu", llvm::DebugCompressionType::GNU)
1054                      .Default(llvm::DebugCompressionType::None);
1055       Opts.setCompressDebugSections(DCT);
1056     }
1057   }
1058 
1059   Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
1060   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1061   for (auto *A :
1062        Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_builtin_bitcode)) {
1063     CodeGenOptions::BitcodeFileToLink F;
1064     F.Filename = A->getValue();
1065     if (A->getOption().matches(OPT_mlink_builtin_bitcode)) {
1066       F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
1067       // When linking CUDA bitcode, propagate function attributes so that
1068       // e.g. libdevice gets fast-math attrs if we're building with fast-math.
1069       F.PropagateAttrs = true;
1070       F.Internalize = true;
1071     }
1072     Opts.LinkBitcodeFiles.push_back(F);
1073   }
1074   Opts.SanitizeCoverageType =
1075       getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
1076   Opts.SanitizeCoverageIndirectCalls =
1077       Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
1078   Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
1079   Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
1080   Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
1081   Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
1082   Opts.SanitizeCoverage8bitCounters =
1083       Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
1084   Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
1085   Opts.SanitizeCoverageTracePCGuard =
1086       Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
1087   Opts.SanitizeCoverageNoPrune = Args.hasArg(OPT_fsanitize_coverage_no_prune);
1088   Opts.SanitizeCoverageInline8bitCounters =
1089       Args.hasArg(OPT_fsanitize_coverage_inline_8bit_counters);
1090   Opts.SanitizeCoveragePCTable = Args.hasArg(OPT_fsanitize_coverage_pc_table);
1091   Opts.SanitizeCoverageStackDepth =
1092       Args.hasArg(OPT_fsanitize_coverage_stack_depth);
1093   Opts.SanitizeMemoryTrackOrigins =
1094       getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
1095   Opts.SanitizeMemoryUseAfterDtor =
1096       Args.hasFlag(OPT_fsanitize_memory_use_after_dtor,
1097                    OPT_fno_sanitize_memory_use_after_dtor,
1098                    false);
1099   Opts.SanitizeMinimalRuntime = Args.hasArg(OPT_fsanitize_minimal_runtime);
1100   Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
1101   Opts.SanitizeCfiICallGeneralizePointers =
1102       Args.hasArg(OPT_fsanitize_cfi_icall_generalize_pointers);
1103   Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
1104   if (Arg *A = Args.getLastArg(
1105           OPT_fsanitize_address_poison_custom_array_cookie,
1106           OPT_fno_sanitize_address_poison_custom_array_cookie)) {
1107     Opts.SanitizeAddressPoisonCustomArrayCookie =
1108         A->getOption().getID() ==
1109         OPT_fsanitize_address_poison_custom_array_cookie;
1110   }
1111   if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
1112                                OPT_fno_sanitize_address_use_after_scope)) {
1113     Opts.SanitizeAddressUseAfterScope =
1114         A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
1115   }
1116   Opts.SanitizeAddressGlobalsDeadStripping =
1117       Args.hasArg(OPT_fsanitize_address_globals_dead_stripping);
1118   if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_odr_indicator,
1119                                OPT_fno_sanitize_address_use_odr_indicator)) {
1120     Opts.SanitizeAddressUseOdrIndicator =
1121         A->getOption().getID() == OPT_fsanitize_address_use_odr_indicator;
1122   }
1123   Opts.SSPBufferSize =
1124       getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
1125   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1126   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1127     StringRef Val = A->getValue();
1128     unsigned StackAlignment = Opts.StackAlignment;
1129     Val.getAsInteger(10, StackAlignment);
1130     Opts.StackAlignment = StackAlignment;
1131   }
1132 
1133   if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
1134     StringRef Val = A->getValue();
1135     unsigned StackProbeSize = Opts.StackProbeSize;
1136     Val.getAsInteger(0, StackProbeSize);
1137     Opts.StackProbeSize = StackProbeSize;
1138   }
1139 
1140   Opts.NoStackArgProbe = Args.hasArg(OPT_mno_stack_arg_probe);
1141 
1142   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1143     StringRef Name = A->getValue();
1144     unsigned Method = llvm::StringSwitch<unsigned>(Name)
1145       .Case("legacy", CodeGenOptions::Legacy)
1146       .Case("non-legacy", CodeGenOptions::NonLegacy)
1147       .Case("mixed", CodeGenOptions::Mixed)
1148       .Default(~0U);
1149     if (Method == ~0U) {
1150       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1151       Success = false;
1152     } else {
1153       Opts.setObjCDispatchMethod(
1154         static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
1155     }
1156   }
1157 
1158   if (Args.getLastArg(OPT_femulated_tls) ||
1159       Args.getLastArg(OPT_fno_emulated_tls)) {
1160     Opts.ExplicitEmulatedTLS = true;
1161     Opts.EmulatedTLS =
1162         Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
1163   }
1164 
1165   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1166     StringRef Name = A->getValue();
1167     unsigned Model = llvm::StringSwitch<unsigned>(Name)
1168         .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1169         .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1170         .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1171         .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1172         .Default(~0U);
1173     if (Model == ~0U) {
1174       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1175       Success = false;
1176     } else {
1177       Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
1178     }
1179   }
1180 
1181   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
1182     StringRef Val = A->getValue();
1183     if (Val == "ieee")
1184       Opts.FPDenormalMode = "ieee";
1185     else if (Val == "preserve-sign")
1186       Opts.FPDenormalMode = "preserve-sign";
1187     else if (Val == "positive-zero")
1188       Opts.FPDenormalMode = "positive-zero";
1189     else
1190       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1191   }
1192 
1193   if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
1194     if (A->getOption().matches(OPT_fpcc_struct_return)) {
1195       Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
1196     } else {
1197       assert(A->getOption().matches(OPT_freg_struct_return));
1198       Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
1199     }
1200   }
1201 
1202   Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
1203   Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
1204   bool NeedLocTracking = false;
1205 
1206   Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
1207   if (!Opts.OptRecordFile.empty())
1208     NeedLocTracking = true;
1209 
1210   if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
1211     Opts.OptimizationRemarkPattern =
1212         GenerateOptimizationRemarkRegex(Diags, Args, A);
1213     NeedLocTracking = true;
1214   }
1215 
1216   if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
1217     Opts.OptimizationRemarkMissedPattern =
1218         GenerateOptimizationRemarkRegex(Diags, Args, A);
1219     NeedLocTracking = true;
1220   }
1221 
1222   if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
1223     Opts.OptimizationRemarkAnalysisPattern =
1224         GenerateOptimizationRemarkRegex(Diags, Args, A);
1225     NeedLocTracking = true;
1226   }
1227 
1228   Opts.DiagnosticsWithHotness =
1229       Args.hasArg(options::OPT_fdiagnostics_show_hotness);
1230   bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
1231   bool UsingProfile = UsingSampleProfile ||
1232       (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
1233 
1234   if (Opts.DiagnosticsWithHotness && !UsingProfile &&
1235       // An IR file will contain PGO as metadata
1236       IK.getLanguage() != InputKind::LLVM_IR)
1237     Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1238         << "-fdiagnostics-show-hotness";
1239 
1240   Opts.DiagnosticsHotnessThreshold = getLastArgUInt64Value(
1241       Args, options::OPT_fdiagnostics_hotness_threshold_EQ, 0);
1242   if (Opts.DiagnosticsHotnessThreshold > 0 && !UsingProfile)
1243     Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1244         << "-fdiagnostics-hotness-threshold=";
1245 
1246   // If the user requested to use a sample profile for PGO, then the
1247   // backend will need to track source location information so the profile
1248   // can be incorporated into the IR.
1249   if (UsingSampleProfile)
1250     NeedLocTracking = true;
1251 
1252   // If the user requested a flag that requires source locations available in
1253   // the backend, make sure that the backend tracks source location information.
1254   if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
1255     Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
1256 
1257   Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
1258 
1259   // Parse -fsanitize-recover= arguments.
1260   // FIXME: Report unrecoverable sanitizers incorrectly specified here.
1261   parseSanitizerKinds("-fsanitize-recover=",
1262                       Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
1263                       Opts.SanitizeRecover);
1264   parseSanitizerKinds("-fsanitize-trap=",
1265                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
1266                       Opts.SanitizeTrap);
1267 
1268   Opts.CudaGpuBinaryFileName =
1269       Args.getLastArgValue(OPT_fcuda_include_gpubinary);
1270 
1271   Opts.Backchain = Args.hasArg(OPT_mbackchain);
1272 
1273   Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
1274       Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
1275 
1276   Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
1277 
1278   Opts.Addrsig = Args.hasArg(OPT_faddrsig);
1279 
1280   if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
1281     StringRef SignScope = A->getValue();
1282 
1283     if (SignScope.equals_lower("none"))
1284       Opts.setSignReturnAddress(CodeGenOptions::SignReturnAddressScope::None);
1285     else if (SignScope.equals_lower("all"))
1286       Opts.setSignReturnAddress(CodeGenOptions::SignReturnAddressScope::All);
1287     else if (SignScope.equals_lower("non-leaf"))
1288       Opts.setSignReturnAddress(
1289           CodeGenOptions::SignReturnAddressScope::NonLeaf);
1290     else
1291       Diags.Report(diag::err_drv_invalid_value)
1292           << A->getAsString(Args) << SignScope;
1293 
1294     if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
1295       StringRef SignKey = A->getValue();
1296       if (!SignScope.empty() && !SignKey.empty()) {
1297         if (SignKey.equals_lower("a_key"))
1298           Opts.setSignReturnAddressKey(
1299               CodeGenOptions::SignReturnAddressKeyValue::AKey);
1300         else if (SignKey.equals_lower("b_key"))
1301           Opts.setSignReturnAddressKey(
1302               CodeGenOptions::SignReturnAddressKeyValue::BKey);
1303         else
1304           Diags.Report(diag::err_drv_invalid_value)
1305               << A->getAsString(Args) << SignKey;
1306       }
1307     }
1308   }
1309 
1310   Opts.BranchTargetEnforcement = Args.hasArg(OPT_mbranch_target_enforce);
1311 
1312   Opts.KeepStaticConsts = Args.hasArg(OPT_fkeep_static_consts);
1313 
1314   Opts.SpeculativeLoadHardening = Args.hasArg(OPT_mspeculative_load_hardening);
1315 
1316   return Success;
1317 }
1318 
1319 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1320                                       ArgList &Args) {
1321   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1322   Opts.Targets = Args.getAllArgValues(OPT_MT);
1323   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1324   Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
1325   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1326   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1327   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1328   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1329   if (Args.hasArg(OPT_show_includes)) {
1330     // Writing both /showIncludes and preprocessor output to stdout
1331     // would produce interleaved output, so use stderr for /showIncludes.
1332     // This behaves the same as cl.exe, when /E, /EP or /P are passed.
1333     if (Args.hasArg(options::OPT_E) || Args.hasArg(options::OPT_P))
1334       Opts.ShowIncludesDest = ShowIncludesDestination::Stderr;
1335     else
1336       Opts.ShowIncludesDest = ShowIncludesDestination::Stdout;
1337   } else {
1338     Opts.ShowIncludesDest = ShowIncludesDestination::None;
1339   }
1340   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1341   Opts.ModuleDependencyOutputDir =
1342       Args.getLastArgValue(OPT_module_dependency_dir);
1343   if (Args.hasArg(OPT_MV))
1344     Opts.OutputFormat = DependencyOutputFormat::NMake;
1345   // Add sanitizer blacklists as extra dependencies.
1346   // They won't be discovered by the regular preprocessor, so
1347   // we let make / ninja to know about this implicit dependency.
1348   Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
1349   // Only the -fmodule-file=<file> form.
1350   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
1351     StringRef Val = A->getValue();
1352     if (Val.find('=') == StringRef::npos)
1353       Opts.ExtraDeps.push_back(Val);
1354   }
1355 }
1356 
1357 static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
1358   // Color diagnostics default to auto ("on" if terminal supports) in the driver
1359   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
1360   // Support both clang's -f[no-]color-diagnostics and gcc's
1361   // -f[no-]diagnostics-colors[=never|always|auto].
1362   enum {
1363     Colors_On,
1364     Colors_Off,
1365     Colors_Auto
1366   } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
1367   for (auto *A : Args) {
1368     const Option &O = A->getOption();
1369     if (O.matches(options::OPT_fcolor_diagnostics) ||
1370         O.matches(options::OPT_fdiagnostics_color)) {
1371       ShowColors = Colors_On;
1372     } else if (O.matches(options::OPT_fno_color_diagnostics) ||
1373                O.matches(options::OPT_fno_diagnostics_color)) {
1374       ShowColors = Colors_Off;
1375     } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
1376       StringRef Value(A->getValue());
1377       if (Value == "always")
1378         ShowColors = Colors_On;
1379       else if (Value == "never")
1380         ShowColors = Colors_Off;
1381       else if (Value == "auto")
1382         ShowColors = Colors_Auto;
1383     }
1384   }
1385   return ShowColors == Colors_On ||
1386          (ShowColors == Colors_Auto &&
1387           llvm::sys::Process::StandardErrHasColors());
1388 }
1389 
1390 static bool checkVerifyPrefixes(const std::vector<std::string> &VerifyPrefixes,
1391                                 DiagnosticsEngine *Diags) {
1392   bool Success = true;
1393   for (const auto &Prefix : VerifyPrefixes) {
1394     // Every prefix must start with a letter and contain only alphanumeric
1395     // characters, hyphens, and underscores.
1396     auto BadChar = std::find_if(Prefix.begin(), Prefix.end(),
1397                                 [](char C){return !isAlphanumeric(C)
1398                                                   && C != '-' && C != '_';});
1399     if (BadChar != Prefix.end() || !isLetter(Prefix[0])) {
1400       Success = false;
1401       if (Diags) {
1402         Diags->Report(diag::err_drv_invalid_value) << "-verify=" << Prefix;
1403         Diags->Report(diag::note_drv_verify_prefix_spelling);
1404       }
1405     }
1406   }
1407   return Success;
1408 }
1409 
1410 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1411                                 DiagnosticsEngine *Diags,
1412                                 bool DefaultDiagColor, bool DefaultShowOpt) {
1413   bool Success = true;
1414 
1415   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1416   if (Arg *A =
1417           Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
1418     Opts.DiagnosticSerializationFile = A->getValue();
1419   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1420   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1421   Opts.Pedantic = Args.hasArg(OPT_pedantic);
1422   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1423   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1424   Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
1425   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1426                                  OPT_fno_show_column,
1427                                  /*Default=*/true);
1428   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1429   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1430   Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
1431   Opts.ShowOptionNames =
1432       Args.hasFlag(OPT_fdiagnostics_show_option,
1433                    OPT_fno_diagnostics_show_option, DefaultShowOpt);
1434 
1435   llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
1436 
1437   // Default behavior is to not to show note include stacks.
1438   Opts.ShowNoteIncludeStack = false;
1439   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1440                                OPT_fno_diagnostics_show_note_include_stack))
1441     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1442       Opts.ShowNoteIncludeStack = true;
1443 
1444   StringRef ShowOverloads =
1445     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1446   if (ShowOverloads == "best")
1447     Opts.setShowOverloads(Ovl_Best);
1448   else if (ShowOverloads == "all")
1449     Opts.setShowOverloads(Ovl_All);
1450   else {
1451     Success = false;
1452     if (Diags)
1453       Diags->Report(diag::err_drv_invalid_value)
1454       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1455       << ShowOverloads;
1456   }
1457 
1458   StringRef ShowCategory =
1459     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1460   if (ShowCategory == "none")
1461     Opts.ShowCategories = 0;
1462   else if (ShowCategory == "id")
1463     Opts.ShowCategories = 1;
1464   else if (ShowCategory == "name")
1465     Opts.ShowCategories = 2;
1466   else {
1467     Success = false;
1468     if (Diags)
1469       Diags->Report(diag::err_drv_invalid_value)
1470       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1471       << ShowCategory;
1472   }
1473 
1474   StringRef Format =
1475     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1476   if (Format == "clang")
1477     Opts.setFormat(DiagnosticOptions::Clang);
1478   else if (Format == "msvc")
1479     Opts.setFormat(DiagnosticOptions::MSVC);
1480   else if (Format == "msvc-fallback") {
1481     Opts.setFormat(DiagnosticOptions::MSVC);
1482     Opts.CLFallbackMode = true;
1483   } else if (Format == "vi")
1484     Opts.setFormat(DiagnosticOptions::Vi);
1485   else {
1486     Success = false;
1487     if (Diags)
1488       Diags->Report(diag::err_drv_invalid_value)
1489       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1490       << Format;
1491   }
1492 
1493   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1494   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1495   Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1496   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify) || Args.hasArg(OPT_verify_EQ);
1497   Opts.VerifyPrefixes = Args.getAllArgValues(OPT_verify_EQ);
1498   if (Args.hasArg(OPT_verify))
1499     Opts.VerifyPrefixes.push_back("expected");
1500   // Keep VerifyPrefixes in its original order for the sake of diagnostics, and
1501   // then sort it to prepare for fast lookup using std::binary_search.
1502   if (!checkVerifyPrefixes(Opts.VerifyPrefixes, Diags)) {
1503     Opts.VerifyDiagnostics = false;
1504     Success = false;
1505   }
1506   else
1507     llvm::sort(Opts.VerifyPrefixes);
1508   DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1509   Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1510     Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1511     Diags, DiagMask);
1512   if (Args.hasArg(OPT_verify_ignore_unexpected))
1513     DiagMask = DiagnosticLevelMask::All;
1514   Opts.setVerifyIgnoreUnexpected(DiagMask);
1515   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1516   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1517   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1518   Opts.MacroBacktraceLimit =
1519       getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1520                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1521   Opts.TemplateBacktraceLimit = getLastArgIntValue(
1522       Args, OPT_ftemplate_backtrace_limit,
1523       DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1524   Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1525       Args, OPT_fconstexpr_backtrace_limit,
1526       DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1527   Opts.SpellCheckingLimit = getLastArgIntValue(
1528       Args, OPT_fspell_checking_limit,
1529       DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1530   Opts.SnippetLineLimit = getLastArgIntValue(
1531       Args, OPT_fcaret_diagnostics_max_lines,
1532       DiagnosticOptions::DefaultSnippetLineLimit, Diags);
1533   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1534                                     DiagnosticOptions::DefaultTabStop, Diags);
1535   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1536     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1537     if (Diags)
1538       Diags->Report(diag::warn_ignoring_ftabstop_value)
1539       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1540   }
1541   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1542   addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1543   addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1544 
1545   return Success;
1546 }
1547 
1548 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1549   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1550 }
1551 
1552 /// Parse the argument to the -ftest-module-file-extension
1553 /// command-line argument.
1554 ///
1555 /// \returns true on error, false on success.
1556 static bool parseTestModuleFileExtensionArg(StringRef Arg,
1557                                             std::string &BlockName,
1558                                             unsigned &MajorVersion,
1559                                             unsigned &MinorVersion,
1560                                             bool &Hashed,
1561                                             std::string &UserInfo) {
1562   SmallVector<StringRef, 5> Args;
1563   Arg.split(Args, ':', 5);
1564   if (Args.size() < 5)
1565     return true;
1566 
1567   BlockName = Args[0];
1568   if (Args[1].getAsInteger(10, MajorVersion)) return true;
1569   if (Args[2].getAsInteger(10, MinorVersion)) return true;
1570   if (Args[3].getAsInteger(2, Hashed)) return true;
1571   if (Args.size() > 4)
1572     UserInfo = Args[4];
1573   return false;
1574 }
1575 
1576 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1577                                    DiagnosticsEngine &Diags,
1578                                    bool &IsHeaderFile) {
1579   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1580   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1581     switch (A->getOption().getID()) {
1582     default:
1583       llvm_unreachable("Invalid option in group!");
1584     case OPT_ast_list:
1585       Opts.ProgramAction = frontend::ASTDeclList; break;
1586     case OPT_ast_dump:
1587     case OPT_ast_dump_all:
1588     case OPT_ast_dump_lookups:
1589       Opts.ProgramAction = frontend::ASTDump; break;
1590     case OPT_ast_print:
1591       Opts.ProgramAction = frontend::ASTPrint; break;
1592     case OPT_ast_view:
1593       Opts.ProgramAction = frontend::ASTView; break;
1594     case OPT_compiler_options_dump:
1595       Opts.ProgramAction = frontend::DumpCompilerOptions; break;
1596     case OPT_dump_raw_tokens:
1597       Opts.ProgramAction = frontend::DumpRawTokens; break;
1598     case OPT_dump_tokens:
1599       Opts.ProgramAction = frontend::DumpTokens; break;
1600     case OPT_S:
1601       Opts.ProgramAction = frontend::EmitAssembly; break;
1602     case OPT_emit_llvm_bc:
1603       Opts.ProgramAction = frontend::EmitBC; break;
1604     case OPT_emit_html:
1605       Opts.ProgramAction = frontend::EmitHTML; break;
1606     case OPT_emit_llvm:
1607       Opts.ProgramAction = frontend::EmitLLVM; break;
1608     case OPT_emit_llvm_only:
1609       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1610     case OPT_emit_codegen_only:
1611       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1612     case OPT_emit_obj:
1613       Opts.ProgramAction = frontend::EmitObj; break;
1614     case OPT_fixit_EQ:
1615       Opts.FixItSuffix = A->getValue();
1616       LLVM_FALLTHROUGH;
1617     case OPT_fixit:
1618       Opts.ProgramAction = frontend::FixIt; break;
1619     case OPT_emit_module:
1620       Opts.ProgramAction = frontend::GenerateModule; break;
1621     case OPT_emit_module_interface:
1622       Opts.ProgramAction = frontend::GenerateModuleInterface; break;
1623     case OPT_emit_header_module:
1624       Opts.ProgramAction = frontend::GenerateHeaderModule; break;
1625     case OPT_emit_pch:
1626       Opts.ProgramAction = frontend::GeneratePCH; break;
1627     case OPT_init_only:
1628       Opts.ProgramAction = frontend::InitOnly; break;
1629     case OPT_fsyntax_only:
1630       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1631     case OPT_module_file_info:
1632       Opts.ProgramAction = frontend::ModuleFileInfo; break;
1633     case OPT_verify_pch:
1634       Opts.ProgramAction = frontend::VerifyPCH; break;
1635     case OPT_print_preamble:
1636       Opts.ProgramAction = frontend::PrintPreamble; break;
1637     case OPT_E:
1638       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1639     case OPT_templight_dump:
1640       Opts.ProgramAction = frontend::TemplightDump; break;
1641     case OPT_rewrite_macros:
1642       Opts.ProgramAction = frontend::RewriteMacros; break;
1643     case OPT_rewrite_objc:
1644       Opts.ProgramAction = frontend::RewriteObjC; break;
1645     case OPT_rewrite_test:
1646       Opts.ProgramAction = frontend::RewriteTest; break;
1647     case OPT_analyze:
1648       Opts.ProgramAction = frontend::RunAnalysis; break;
1649     case OPT_migrate:
1650       Opts.ProgramAction = frontend::MigrateSource; break;
1651     case OPT_Eonly:
1652       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1653     }
1654   }
1655 
1656   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1657     Opts.Plugins.emplace_back(A->getValue(0));
1658     Opts.ProgramAction = frontend::PluginAction;
1659     Opts.ActionName = A->getValue();
1660   }
1661   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1662   for (const auto *AA : Args.filtered(OPT_plugin_arg))
1663     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1664 
1665   for (const std::string &Arg :
1666          Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1667     std::string BlockName;
1668     unsigned MajorVersion;
1669     unsigned MinorVersion;
1670     bool Hashed;
1671     std::string UserInfo;
1672     if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1673                                         MinorVersion, Hashed, UserInfo)) {
1674       Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1675 
1676       continue;
1677     }
1678 
1679     // Add the testing module file extension.
1680     Opts.ModuleFileExtensions.push_back(
1681         std::make_shared<TestModuleFileExtension>(
1682             BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
1683   }
1684 
1685   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1686     Opts.CodeCompletionAt =
1687       ParsedSourceLocation::FromString(A->getValue());
1688     if (Opts.CodeCompletionAt.FileName.empty())
1689       Diags.Report(diag::err_drv_invalid_value)
1690         << A->getAsString(Args) << A->getValue();
1691   }
1692   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1693 
1694   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1695   Opts.Plugins = Args.getAllArgValues(OPT_load);
1696   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1697   Opts.ShowHelp = Args.hasArg(OPT_help);
1698   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1699   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1700   Opts.ShowVersion = Args.hasArg(OPT_version);
1701   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1702   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1703   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1704   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1705   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1706   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1707   Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1708   Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all);
1709   Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1710   Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1711   Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1712   Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1713   Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1714   // Only the -fmodule-file=<file> form.
1715   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
1716     StringRef Val = A->getValue();
1717     if (Val.find('=') == StringRef::npos)
1718       Opts.ModuleFiles.push_back(Val);
1719   }
1720   Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1721   Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1722   Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1723 
1724   Opts.CodeCompleteOpts.IncludeMacros
1725     = Args.hasArg(OPT_code_completion_macros);
1726   Opts.CodeCompleteOpts.IncludeCodePatterns
1727     = Args.hasArg(OPT_code_completion_patterns);
1728   Opts.CodeCompleteOpts.IncludeGlobals
1729     = !Args.hasArg(OPT_no_code_completion_globals);
1730   Opts.CodeCompleteOpts.IncludeNamespaceLevelDecls
1731     = !Args.hasArg(OPT_no_code_completion_ns_level_decls);
1732   Opts.CodeCompleteOpts.IncludeBriefComments
1733     = Args.hasArg(OPT_code_completion_brief_comments);
1734   Opts.CodeCompleteOpts.IncludeFixIts
1735     = Args.hasArg(OPT_code_completion_with_fixits);
1736 
1737   Opts.OverrideRecordLayoutsFile
1738     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1739   Opts.AuxTriple = Args.getLastArgValue(OPT_aux_triple);
1740   Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
1741 
1742   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1743                                      OPT_arcmt_modify,
1744                                      OPT_arcmt_migrate)) {
1745     switch (A->getOption().getID()) {
1746     default:
1747       llvm_unreachable("missed a case");
1748     case OPT_arcmt_check:
1749       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1750       break;
1751     case OPT_arcmt_modify:
1752       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1753       break;
1754     case OPT_arcmt_migrate:
1755       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1756       break;
1757     }
1758   }
1759   Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1760   Opts.ARCMTMigrateReportOut
1761     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1762   Opts.ARCMTMigrateEmitARCErrors
1763     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1764 
1765   if (Args.hasArg(OPT_objcmt_migrate_literals))
1766     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1767   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1768     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1769   if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1770     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1771   if (Args.hasArg(OPT_objcmt_migrate_property))
1772     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1773   if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1774     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1775   if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1776     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1777   if (Args.hasArg(OPT_objcmt_migrate_annotation))
1778     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1779   if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1780     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1781   if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1782     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1783   if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1784     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1785   if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1786     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1787   if (Args.hasArg(OPT_objcmt_atomic_property))
1788     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1789   if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1790     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1791   if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1792     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1793   if (Args.hasArg(OPT_objcmt_migrate_all))
1794     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1795 
1796   Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1797 
1798   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1799       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1800     Diags.Report(diag::err_drv_argument_not_allowed_with)
1801       << "ARC migration" << "ObjC migration";
1802   }
1803 
1804   InputKind DashX(InputKind::Unknown);
1805   if (const Arg *A = Args.getLastArg(OPT_x)) {
1806     StringRef XValue = A->getValue();
1807 
1808     // Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
1809     // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
1810     bool Preprocessed = XValue.consume_back("-cpp-output");
1811     bool ModuleMap = XValue.consume_back("-module-map");
1812     IsHeaderFile =
1813         !Preprocessed && !ModuleMap && XValue.consume_back("-header");
1814 
1815     // Principal languages.
1816     DashX = llvm::StringSwitch<InputKind>(XValue)
1817                 .Case("c", InputKind::C)
1818                 .Case("cl", InputKind::OpenCL)
1819                 .Case("cuda", InputKind::CUDA)
1820                 .Case("hip", InputKind::HIP)
1821                 .Case("c++", InputKind::CXX)
1822                 .Case("objective-c", InputKind::ObjC)
1823                 .Case("objective-c++", InputKind::ObjCXX)
1824                 .Case("renderscript", InputKind::RenderScript)
1825                 .Default(InputKind::Unknown);
1826 
1827     // "objc[++]-cpp-output" is an acceptable synonym for
1828     // "objective-c[++]-cpp-output".
1829     if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
1830       DashX = llvm::StringSwitch<InputKind>(XValue)
1831                   .Case("objc", InputKind::ObjC)
1832                   .Case("objc++", InputKind::ObjCXX)
1833                   .Default(InputKind::Unknown);
1834 
1835     // Some special cases cannot be combined with suffixes.
1836     if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
1837       DashX = llvm::StringSwitch<InputKind>(XValue)
1838                   .Case("cpp-output", InputKind(InputKind::C).getPreprocessed())
1839                   .Case("assembler-with-cpp", InputKind::Asm)
1840                   .Cases("ast", "pcm",
1841                          InputKind(InputKind::Unknown, InputKind::Precompiled))
1842                   .Case("ir", InputKind::LLVM_IR)
1843                   .Default(InputKind::Unknown);
1844 
1845     if (DashX.isUnknown())
1846       Diags.Report(diag::err_drv_invalid_value)
1847         << A->getAsString(Args) << A->getValue();
1848 
1849     if (Preprocessed)
1850       DashX = DashX.getPreprocessed();
1851     if (ModuleMap)
1852       DashX = DashX.withFormat(InputKind::ModuleMap);
1853   }
1854 
1855   // '-' is the default input if none is given.
1856   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1857   Opts.Inputs.clear();
1858   if (Inputs.empty())
1859     Inputs.push_back("-");
1860   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1861     InputKind IK = DashX;
1862     if (IK.isUnknown()) {
1863       IK = FrontendOptions::getInputKindForExtension(
1864         StringRef(Inputs[i]).rsplit('.').second);
1865       // FIXME: Warn on this?
1866       if (IK.isUnknown())
1867         IK = InputKind::C;
1868       // FIXME: Remove this hack.
1869       if (i == 0)
1870         DashX = IK;
1871     }
1872 
1873     // The -emit-module action implicitly takes a module map.
1874     if (Opts.ProgramAction == frontend::GenerateModule &&
1875         IK.getFormat() == InputKind::Source)
1876       IK = IK.withFormat(InputKind::ModuleMap);
1877 
1878     Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1879   }
1880 
1881   return DashX;
1882 }
1883 
1884 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1885                                                  void *MainAddr) {
1886   std::string ClangExecutable =
1887       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1888   StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1889 
1890   // Compute the path to the resource directory.
1891   StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1892   SmallString<128> P(Dir);
1893   if (ClangResourceDir != "")
1894     llvm::sys::path::append(P, ClangResourceDir);
1895   else
1896     llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1897                             "clang", CLANG_VERSION_STRING);
1898 
1899   return P.str();
1900 }
1901 
1902 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
1903                                   const std::string &WorkingDir) {
1904   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1905   Opts.Verbose = Args.hasArg(OPT_v);
1906   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1907   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1908   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1909   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1910     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1911   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1912 
1913   // Canonicalize -fmodules-cache-path before storing it.
1914   SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
1915   if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
1916     if (WorkingDir.empty())
1917       llvm::sys::fs::make_absolute(P);
1918     else
1919       llvm::sys::fs::make_absolute(WorkingDir, P);
1920   }
1921   llvm::sys::path::remove_dots(P);
1922   Opts.ModuleCachePath = P.str();
1923 
1924   Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1925   // Only the -fmodule-file=<name>=<file> form.
1926   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
1927     StringRef Val = A->getValue();
1928     if (Val.find('=') != StringRef::npos)
1929       Opts.PrebuiltModuleFiles.insert(Val.split('='));
1930   }
1931   for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
1932     Opts.AddPrebuiltModulePath(A->getValue());
1933   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1934   Opts.ModulesHashContent = Args.hasArg(OPT_fmodules_hash_content);
1935   Opts.ModulesValidateDiagnosticOptions =
1936       !Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
1937   Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1938   Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1939   Opts.ModuleCachePruneInterval =
1940       getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1941   Opts.ModuleCachePruneAfter =
1942       getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1943   Opts.ModulesValidateOncePerBuildSession =
1944       Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1945   Opts.BuildSessionTimestamp =
1946       getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1947   Opts.ModulesValidateSystemHeaders =
1948       Args.hasArg(OPT_fmodules_validate_system_headers);
1949   if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1950     Opts.ModuleFormat = A->getValue();
1951 
1952   for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1953     StringRef MacroDef = A->getValue();
1954     Opts.ModulesIgnoreMacros.insert(
1955         llvm::CachedHashString(MacroDef.split('=').first));
1956   }
1957 
1958   // Add -I..., -F..., and -index-header-map options in order.
1959   bool IsIndexHeaderMap = false;
1960   bool IsSysrootSpecified =
1961       Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1962   for (const auto *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1963     if (A->getOption().matches(OPT_index_header_map)) {
1964       // -index-header-map applies to the next -I or -F.
1965       IsIndexHeaderMap = true;
1966       continue;
1967     }
1968 
1969     frontend::IncludeDirGroup Group =
1970         IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1971 
1972     bool IsFramework = A->getOption().matches(OPT_F);
1973     std::string Path = A->getValue();
1974 
1975     if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1976       SmallString<32> Buffer;
1977       llvm::sys::path::append(Buffer, Opts.Sysroot,
1978                               llvm::StringRef(A->getValue()).substr(1));
1979       Path = Buffer.str();
1980     }
1981 
1982     Opts.AddPath(Path, Group, IsFramework,
1983                  /*IgnoreSysroot*/ true);
1984     IsIndexHeaderMap = false;
1985   }
1986 
1987   // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1988   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1989   for (const auto *A :
1990        Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1991     if (A->getOption().matches(OPT_iprefix))
1992       Prefix = A->getValue();
1993     else if (A->getOption().matches(OPT_iwithprefix))
1994       Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1995     else
1996       Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1997   }
1998 
1999   for (const auto *A : Args.filtered(OPT_idirafter))
2000     Opts.AddPath(A->getValue(), frontend::After, false, true);
2001   for (const auto *A : Args.filtered(OPT_iquote))
2002     Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
2003   for (const auto *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
2004     Opts.AddPath(A->getValue(), frontend::System, false,
2005                  !A->getOption().matches(OPT_iwithsysroot));
2006   for (const auto *A : Args.filtered(OPT_iframework))
2007     Opts.AddPath(A->getValue(), frontend::System, true, true);
2008   for (const auto *A : Args.filtered(OPT_iframeworkwithsysroot))
2009     Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
2010                  /*IgnoreSysRoot=*/false);
2011 
2012   // Add the paths for the various language specific isystem flags.
2013   for (const auto *A : Args.filtered(OPT_c_isystem))
2014     Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
2015   for (const auto *A : Args.filtered(OPT_cxx_isystem))
2016     Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
2017   for (const auto *A : Args.filtered(OPT_objc_isystem))
2018     Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
2019   for (const auto *A : Args.filtered(OPT_objcxx_isystem))
2020     Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
2021 
2022   // Add the internal paths from a driver that detects standard include paths.
2023   for (const auto *A :
2024        Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
2025     frontend::IncludeDirGroup Group = frontend::System;
2026     if (A->getOption().matches(OPT_internal_externc_isystem))
2027       Group = frontend::ExternCSystem;
2028     Opts.AddPath(A->getValue(), Group, false, true);
2029   }
2030 
2031   // Add the path prefixes which are implicitly treated as being system headers.
2032   for (const auto *A :
2033        Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
2034     Opts.AddSystemHeaderPrefix(
2035         A->getValue(), A->getOption().matches(OPT_system_header_prefix));
2036 
2037   for (const auto *A : Args.filtered(OPT_ivfsoverlay))
2038     Opts.AddVFSOverlayFile(A->getValue());
2039 }
2040 
2041 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
2042                                          const llvm::Triple &T,
2043                                          PreprocessorOptions &PPOpts,
2044                                          LangStandard::Kind LangStd) {
2045   // Set some properties which depend solely on the input kind; it would be nice
2046   // to move these to the language standard, and have the driver resolve the
2047   // input kind + language standard.
2048   //
2049   // FIXME: Perhaps a better model would be for a single source file to have
2050   // multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
2051   // simultaneously active?
2052   if (IK.getLanguage() == InputKind::Asm) {
2053     Opts.AsmPreprocessor = 1;
2054   } else if (IK.isObjectiveC()) {
2055     Opts.ObjC = 1;
2056   }
2057 
2058   if (LangStd == LangStandard::lang_unspecified) {
2059     // Based on the base language, pick one.
2060     switch (IK.getLanguage()) {
2061     case InputKind::Unknown:
2062     case InputKind::LLVM_IR:
2063       llvm_unreachable("Invalid input kind!");
2064     case InputKind::OpenCL:
2065       LangStd = LangStandard::lang_opencl10;
2066       break;
2067     case InputKind::CUDA:
2068       LangStd = LangStandard::lang_cuda;
2069       break;
2070     case InputKind::Asm:
2071     case InputKind::C:
2072 #if defined(CLANG_DEFAULT_STD_C)
2073       LangStd = CLANG_DEFAULT_STD_C;
2074 #else
2075       // The PS4 uses C99 as the default C standard.
2076       if (T.isPS4())
2077         LangStd = LangStandard::lang_gnu99;
2078       else
2079         LangStd = LangStandard::lang_gnu11;
2080 #endif
2081       break;
2082     case InputKind::ObjC:
2083 #if defined(CLANG_DEFAULT_STD_C)
2084       LangStd = CLANG_DEFAULT_STD_C;
2085 #else
2086       LangStd = LangStandard::lang_gnu11;
2087 #endif
2088       break;
2089     case InputKind::CXX:
2090     case InputKind::ObjCXX:
2091 #if defined(CLANG_DEFAULT_STD_CXX)
2092       LangStd = CLANG_DEFAULT_STD_CXX;
2093 #else
2094       LangStd = LangStandard::lang_gnucxx14;
2095 #endif
2096       break;
2097     case InputKind::RenderScript:
2098       LangStd = LangStandard::lang_c99;
2099       break;
2100     case InputKind::HIP:
2101       LangStd = LangStandard::lang_hip;
2102       break;
2103     }
2104   }
2105 
2106   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
2107   Opts.LineComment = Std.hasLineComments();
2108   Opts.C99 = Std.isC99();
2109   Opts.C11 = Std.isC11();
2110   Opts.C17 = Std.isC17();
2111   Opts.CPlusPlus = Std.isCPlusPlus();
2112   Opts.CPlusPlus11 = Std.isCPlusPlus11();
2113   Opts.CPlusPlus14 = Std.isCPlusPlus14();
2114   Opts.CPlusPlus17 = Std.isCPlusPlus17();
2115   Opts.CPlusPlus2a = Std.isCPlusPlus2a();
2116   Opts.Digraphs = Std.hasDigraphs();
2117   Opts.GNUMode = Std.isGNUMode();
2118   Opts.GNUInline = !Opts.C99 && !Opts.CPlusPlus;
2119   Opts.HexFloats = Std.hasHexFloats();
2120   Opts.ImplicitInt = Std.hasImplicitInt();
2121 
2122   // Set OpenCL Version.
2123   Opts.OpenCL = Std.isOpenCL();
2124   if (LangStd == LangStandard::lang_opencl10)
2125     Opts.OpenCLVersion = 100;
2126   else if (LangStd == LangStandard::lang_opencl11)
2127     Opts.OpenCLVersion = 110;
2128   else if (LangStd == LangStandard::lang_opencl12)
2129     Opts.OpenCLVersion = 120;
2130   else if (LangStd == LangStandard::lang_opencl20)
2131     Opts.OpenCLVersion = 200;
2132   else if (LangStd == LangStandard::lang_openclcpp)
2133     Opts.OpenCLCPlusPlusVersion = 100;
2134 
2135   // OpenCL has some additional defaults.
2136   if (Opts.OpenCL) {
2137     Opts.AltiVec = 0;
2138     Opts.ZVector = 0;
2139     Opts.LaxVectorConversions = 0;
2140     Opts.setDefaultFPContractMode(LangOptions::FPC_On);
2141     Opts.NativeHalfType = 1;
2142     Opts.NativeHalfArgsAndReturns = 1;
2143     Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
2144     // Include default header file for OpenCL.
2145     if (Opts.IncludeDefaultHeader) {
2146       PPOpts.Includes.push_back("opencl-c.h");
2147     }
2148   }
2149 
2150   Opts.HIP = IK.getLanguage() == InputKind::HIP;
2151   Opts.CUDA = IK.getLanguage() == InputKind::CUDA || Opts.HIP;
2152   if (Opts.CUDA)
2153     // Set default FP_CONTRACT to FAST.
2154     Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
2155 
2156   Opts.RenderScript = IK.getLanguage() == InputKind::RenderScript;
2157   if (Opts.RenderScript) {
2158     Opts.NativeHalfType = 1;
2159     Opts.NativeHalfArgsAndReturns = 1;
2160   }
2161 
2162   // OpenCL and C++ both have bool, true, false keywords.
2163   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
2164 
2165   // OpenCL has half keyword
2166   Opts.Half = Opts.OpenCL;
2167 
2168   // C++ has wchar_t keyword.
2169   Opts.WChar = Opts.CPlusPlus;
2170 
2171   Opts.GNUKeywords = Opts.GNUMode;
2172   Opts.CXXOperatorNames = Opts.CPlusPlus;
2173 
2174   Opts.AlignedAllocation = Opts.CPlusPlus17;
2175 
2176   Opts.DollarIdents = !Opts.AsmPreprocessor;
2177 }
2178 
2179 /// Attempt to parse a visibility value out of the given argument.
2180 static Visibility parseVisibility(Arg *arg, ArgList &args,
2181                                   DiagnosticsEngine &diags) {
2182   StringRef value = arg->getValue();
2183   if (value == "default") {
2184     return DefaultVisibility;
2185   } else if (value == "hidden" || value == "internal") {
2186     return HiddenVisibility;
2187   } else if (value == "protected") {
2188     // FIXME: diagnose if target does not support protected visibility
2189     return ProtectedVisibility;
2190   }
2191 
2192   diags.Report(diag::err_drv_invalid_value)
2193     << arg->getAsString(args) << value;
2194   return DefaultVisibility;
2195 }
2196 
2197 /// Check if input file kind and language standard are compatible.
2198 static bool IsInputCompatibleWithStandard(InputKind IK,
2199                                           const LangStandard &S) {
2200   switch (IK.getLanguage()) {
2201   case InputKind::Unknown:
2202   case InputKind::LLVM_IR:
2203     llvm_unreachable("should not parse language flags for this input");
2204 
2205   case InputKind::C:
2206   case InputKind::ObjC:
2207   case InputKind::RenderScript:
2208     return S.getLanguage() == InputKind::C;
2209 
2210   case InputKind::OpenCL:
2211     return S.getLanguage() == InputKind::OpenCL;
2212 
2213   case InputKind::CXX:
2214   case InputKind::ObjCXX:
2215     return S.getLanguage() == InputKind::CXX;
2216 
2217   case InputKind::CUDA:
2218     // FIXME: What -std= values should be permitted for CUDA compilations?
2219     return S.getLanguage() == InputKind::CUDA ||
2220            S.getLanguage() == InputKind::CXX;
2221 
2222   case InputKind::HIP:
2223     return S.getLanguage() == InputKind::CXX ||
2224            S.getLanguage() == InputKind::HIP;
2225 
2226   case InputKind::Asm:
2227     // Accept (and ignore) all -std= values.
2228     // FIXME: The -std= value is not ignored; it affects the tokenization
2229     // and preprocessing rules if we're preprocessing this asm input.
2230     return true;
2231   }
2232 
2233   llvm_unreachable("unexpected input language");
2234 }
2235 
2236 /// Get language name for given input kind.
2237 static const StringRef GetInputKindName(InputKind IK) {
2238   switch (IK.getLanguage()) {
2239   case InputKind::C:
2240     return "C";
2241   case InputKind::ObjC:
2242     return "Objective-C";
2243   case InputKind::CXX:
2244     return "C++";
2245   case InputKind::ObjCXX:
2246     return "Objective-C++";
2247   case InputKind::OpenCL:
2248     return "OpenCL";
2249   case InputKind::CUDA:
2250     return "CUDA";
2251   case InputKind::RenderScript:
2252     return "RenderScript";
2253   case InputKind::HIP:
2254     return "HIP";
2255 
2256   case InputKind::Asm:
2257     return "Asm";
2258   case InputKind::LLVM_IR:
2259     return "LLVM IR";
2260 
2261   case InputKind::Unknown:
2262     break;
2263   }
2264   llvm_unreachable("unknown input language");
2265 }
2266 
2267 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
2268                           const TargetOptions &TargetOpts,
2269                           PreprocessorOptions &PPOpts,
2270                           DiagnosticsEngine &Diags) {
2271   // FIXME: Cleanup per-file based stuff.
2272   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
2273   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
2274     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
2275 #define LANGSTANDARD(id, name, lang, desc, features) \
2276       .Case(name, LangStandard::lang_##id)
2277 #define LANGSTANDARD_ALIAS(id, alias) \
2278       .Case(alias, LangStandard::lang_##id)
2279 #include "clang/Frontend/LangStandards.def"
2280       .Default(LangStandard::lang_unspecified);
2281     if (LangStd == LangStandard::lang_unspecified) {
2282       Diags.Report(diag::err_drv_invalid_value)
2283         << A->getAsString(Args) << A->getValue();
2284       // Report supported standards with short description.
2285       for (unsigned KindValue = 0;
2286            KindValue != LangStandard::lang_unspecified;
2287            ++KindValue) {
2288         const LangStandard &Std = LangStandard::getLangStandardForKind(
2289           static_cast<LangStandard::Kind>(KindValue));
2290         if (IsInputCompatibleWithStandard(IK, Std)) {
2291           auto Diag = Diags.Report(diag::note_drv_use_standard);
2292           Diag << Std.getName() << Std.getDescription();
2293           unsigned NumAliases = 0;
2294 #define LANGSTANDARD(id, name, lang, desc, features)
2295 #define LANGSTANDARD_ALIAS(id, alias) \
2296           if (KindValue == LangStandard::lang_##id) ++NumAliases;
2297 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
2298 #include "clang/Frontend/LangStandards.def"
2299           Diag << NumAliases;
2300 #define LANGSTANDARD(id, name, lang, desc, features)
2301 #define LANGSTANDARD_ALIAS(id, alias) \
2302           if (KindValue == LangStandard::lang_##id) Diag << alias;
2303 #define LANGSTANDARD_ALIAS_DEPR(id, alias)
2304 #include "clang/Frontend/LangStandards.def"
2305         }
2306       }
2307     } else {
2308       // Valid standard, check to make sure language and standard are
2309       // compatible.
2310       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
2311       if (!IsInputCompatibleWithStandard(IK, Std)) {
2312         Diags.Report(diag::err_drv_argument_not_allowed_with)
2313           << A->getAsString(Args) << GetInputKindName(IK);
2314       }
2315     }
2316   }
2317 
2318   if (Args.hasArg(OPT_fno_dllexport_inlines))
2319     Opts.DllExportInlines = false;
2320 
2321   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
2322     StringRef Name = A->getValue();
2323     if (Name == "full" || Name == "branch") {
2324       Opts.CFProtectionBranch = 1;
2325     }
2326   }
2327   // -cl-std only applies for OpenCL language standards.
2328   // Override the -std option in this case.
2329   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
2330     LangStandard::Kind OpenCLLangStd
2331       = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
2332         .Cases("cl", "CL", LangStandard::lang_opencl10)
2333         .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
2334         .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
2335         .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
2336         .Case("c++", LangStandard::lang_openclcpp)
2337         .Default(LangStandard::lang_unspecified);
2338 
2339     if (OpenCLLangStd == LangStandard::lang_unspecified) {
2340       Diags.Report(diag::err_drv_invalid_value)
2341         << A->getAsString(Args) << A->getValue();
2342     }
2343     else
2344       LangStd = OpenCLLangStd;
2345   }
2346 
2347   Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
2348 
2349   llvm::Triple T(TargetOpts.Triple);
2350   CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
2351 
2352   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
2353   // This option should be deprecated for CL > 1.0 because
2354   // this option was added for compatibility with OpenCL 1.0.
2355   if (Args.getLastArg(OPT_cl_strict_aliasing)
2356        && Opts.OpenCLVersion > 100) {
2357     Diags.Report(diag::warn_option_invalid_ocl_version)
2358         << Opts.getOpenCLVersionTuple().getAsString()
2359         << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
2360   }
2361 
2362   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
2363   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
2364   // while a subset (the non-C++ GNU keywords) is provided by GCC's
2365   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
2366   // name, as it doesn't seem a useful distinction.
2367   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
2368                                   Opts.GNUKeywords);
2369 
2370   Opts.Digraphs = Args.hasFlag(OPT_fdigraphs, OPT_fno_digraphs, Opts.Digraphs);
2371 
2372   if (Args.hasArg(OPT_fno_operator_names))
2373     Opts.CXXOperatorNames = 0;
2374 
2375   if (Args.hasArg(OPT_fcuda_is_device))
2376     Opts.CUDAIsDevice = 1;
2377 
2378   if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
2379     Opts.CUDAAllowVariadicFunctions = 1;
2380 
2381   if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
2382     Opts.CUDAHostDeviceConstexpr = 0;
2383 
2384   if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
2385     Opts.CUDADeviceApproxTranscendentals = 1;
2386 
2387   Opts.GPURelocatableDeviceCode = Args.hasArg(OPT_fgpu_rdc);
2388 
2389   if (Opts.ObjC) {
2390     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
2391       StringRef value = arg->getValue();
2392       if (Opts.ObjCRuntime.tryParse(value))
2393         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
2394     }
2395 
2396     if (Args.hasArg(OPT_fobjc_gc_only))
2397       Opts.setGC(LangOptions::GCOnly);
2398     else if (Args.hasArg(OPT_fobjc_gc))
2399       Opts.setGC(LangOptions::HybridGC);
2400     else if (Args.hasArg(OPT_fobjc_arc)) {
2401       Opts.ObjCAutoRefCount = 1;
2402       if (!Opts.ObjCRuntime.allowsARC())
2403         Diags.Report(diag::err_arc_unsupported_on_runtime);
2404     }
2405 
2406     // ObjCWeakRuntime tracks whether the runtime supports __weak, not
2407     // whether the feature is actually enabled.  This is predominantly
2408     // determined by -fobjc-runtime, but we allow it to be overridden
2409     // from the command line for testing purposes.
2410     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
2411       Opts.ObjCWeakRuntime = 1;
2412     else
2413       Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
2414 
2415     // ObjCWeak determines whether __weak is actually enabled.
2416     // Note that we allow -fno-objc-weak to disable this even in ARC mode.
2417     if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
2418       if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
2419         assert(!Opts.ObjCWeak);
2420       } else if (Opts.getGC() != LangOptions::NonGC) {
2421         Diags.Report(diag::err_objc_weak_with_gc);
2422       } else if (!Opts.ObjCWeakRuntime) {
2423         Diags.Report(diag::err_objc_weak_unsupported);
2424       } else {
2425         Opts.ObjCWeak = 1;
2426       }
2427     } else if (Opts.ObjCAutoRefCount) {
2428       Opts.ObjCWeak = Opts.ObjCWeakRuntime;
2429     }
2430 
2431     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
2432       Opts.ObjCInferRelatedResultType = 0;
2433 
2434     if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
2435       Opts.ObjCSubscriptingLegacyRuntime =
2436         (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
2437   }
2438 
2439   if (Args.hasArg(OPT_fgnu89_inline)) {
2440     if (Opts.CPlusPlus)
2441       Diags.Report(diag::err_drv_argument_not_allowed_with)
2442         << "-fgnu89-inline" << GetInputKindName(IK);
2443     else
2444       Opts.GNUInline = 1;
2445   }
2446 
2447   if (Args.hasArg(OPT_fapple_kext)) {
2448     if (!Opts.CPlusPlus)
2449       Diags.Report(diag::warn_c_kext);
2450     else
2451       Opts.AppleKext = 1;
2452   }
2453 
2454   if (Args.hasArg(OPT_print_ivar_layout))
2455     Opts.ObjCGCBitmapPrint = 1;
2456 
2457   if (Args.hasArg(OPT_fno_constant_cfstrings))
2458     Opts.NoConstantCFStrings = 1;
2459   if (const auto *A = Args.getLastArg(OPT_fcf_runtime_abi_EQ))
2460     Opts.CFRuntime =
2461         llvm::StringSwitch<LangOptions::CoreFoundationABI>(A->getValue())
2462             .Cases("unspecified", "standalone", "objc",
2463                    LangOptions::CoreFoundationABI::ObjectiveC)
2464             .Cases("swift", "swift-5.0",
2465                    LangOptions::CoreFoundationABI::Swift5_0)
2466             .Case("swift-4.2", LangOptions::CoreFoundationABI::Swift4_2)
2467             .Case("swift-4.1", LangOptions::CoreFoundationABI::Swift4_1)
2468             .Default(LangOptions::CoreFoundationABI::ObjectiveC);
2469 
2470   if (Args.hasArg(OPT_fzvector))
2471     Opts.ZVector = 1;
2472 
2473   if (Args.hasArg(OPT_pthread))
2474     Opts.POSIXThreads = 1;
2475 
2476   // The value-visibility mode defaults to "default".
2477   if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
2478     Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
2479   } else {
2480     Opts.setValueVisibilityMode(DefaultVisibility);
2481   }
2482 
2483   // The type-visibility mode defaults to the value-visibility mode.
2484   if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
2485     Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
2486   } else {
2487     Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
2488   }
2489 
2490   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2491     Opts.InlineVisibilityHidden = 1;
2492 
2493   if (Args.hasArg(OPT_fvisibility_global_new_delete_hidden))
2494     Opts.GlobalAllocationFunctionVisibilityHidden = 1;
2495 
2496   if (Args.hasArg(OPT_ftrapv)) {
2497     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2498     // Set the handler, if one is specified.
2499     Opts.OverflowHandler =
2500         Args.getLastArgValue(OPT_ftrapv_handler);
2501   }
2502   else if (Args.hasArg(OPT_fwrapv))
2503     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2504 
2505   Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
2506   Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
2507   Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
2508   Opts.MSCompatibilityVersion = 0;
2509   if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
2510     VersionTuple VT;
2511     if (VT.tryParse(A->getValue()))
2512       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2513                                                 << A->getValue();
2514     Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
2515                                   VT.getMinor().getValueOr(0) * 100000 +
2516                                   VT.getSubminor().getValueOr(0);
2517   }
2518 
2519   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
2520   // is specified, or -std is set to a conforming mode.
2521   // Trigraphs are disabled by default in c++1z onwards.
2522   Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17;
2523   Opts.Trigraphs =
2524       Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
2525 
2526   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2527                                    OPT_fno_dollars_in_identifiers,
2528                                    Opts.DollarIdents);
2529   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2530   Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
2531   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2532   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2533   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2534                                    Opts.ConstStrings);
2535   if (Args.hasArg(OPT_fno_lax_vector_conversions))
2536     Opts.LaxVectorConversions = 0;
2537   if (Args.hasArg(OPT_fno_threadsafe_statics))
2538     Opts.ThreadsafeStatics = 0;
2539   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2540   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2541   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2542 
2543   // -ffixed-point
2544   Opts.FixedPoint =
2545       Args.hasFlag(OPT_ffixed_point, OPT_fno_fixed_point, /*Default=*/false) &&
2546       !Opts.CPlusPlus;
2547   Opts.PaddingOnUnsignedFixedPoint =
2548       Args.hasFlag(OPT_fpadding_on_unsigned_fixed_point,
2549                    OPT_fno_padding_on_unsigned_fixed_point,
2550                    /*Default=*/false) &&
2551       Opts.FixedPoint;
2552 
2553   // Handle exception personalities
2554   Arg *A = Args.getLastArg(options::OPT_fsjlj_exceptions,
2555                            options::OPT_fseh_exceptions,
2556                            options::OPT_fdwarf_exceptions);
2557   if (A) {
2558     const Option &Opt = A->getOption();
2559     llvm::Triple T(TargetOpts.Triple);
2560     if (T.isWindowsMSVCEnvironment())
2561       Diags.Report(diag::err_fe_invalid_exception_model)
2562           << Opt.getName() << T.str();
2563 
2564     Opts.SjLjExceptions = Opt.matches(options::OPT_fsjlj_exceptions);
2565     Opts.SEHExceptions = Opt.matches(options::OPT_fseh_exceptions);
2566     Opts.DWARFExceptions = Opt.matches(options::OPT_fdwarf_exceptions);
2567   }
2568 
2569   Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
2570   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2571 
2572   Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
2573   Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
2574   Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
2575     && Opts.OpenCLVersion == 200);
2576   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2577   Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
2578 
2579   // Enable [[]] attributes in C++11 by default.
2580   Opts.DoubleSquareBracketAttributes =
2581       Args.hasFlag(OPT_fdouble_square_bracket_attributes,
2582                    OPT_fno_double_square_bracket_attributes, Opts.CPlusPlus11);
2583 
2584   Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
2585   Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
2586   Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
2587   Opts.ModulesDeclUse =
2588       Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
2589   Opts.ModulesLocalVisibility =
2590       Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
2591   Opts.ModulesCodegen = Args.hasArg(OPT_fmodules_codegen);
2592   Opts.ModulesDebugInfo = Args.hasArg(OPT_fmodules_debuginfo);
2593   Opts.ModulesSearchAll = Opts.Modules &&
2594     !Args.hasArg(OPT_fno_modules_search_all) &&
2595     Args.hasArg(OPT_fmodules_search_all);
2596   Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
2597   Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
2598   Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
2599   Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2600   Opts.Char8 = Args.hasFlag(OPT_fchar8__t, OPT_fno_char8__t, Opts.CPlusPlus2a);
2601   if (const Arg *A = Args.getLastArg(OPT_fwchar_type_EQ)) {
2602     Opts.WCharSize = llvm::StringSwitch<unsigned>(A->getValue())
2603                          .Case("char", 1)
2604                          .Case("short", 2)
2605                          .Case("int", 4)
2606                          .Default(0);
2607     if (Opts.WCharSize == 0)
2608       Diags.Report(diag::err_fe_invalid_wchar_type) << A->getValue();
2609   }
2610   Opts.WCharIsSigned = Args.hasFlag(OPT_fsigned_wchar, OPT_fno_signed_wchar, true);
2611   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2612   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2613   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2614   if (!Opts.NoBuiltin)
2615     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
2616   Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
2617   Opts.RelaxedTemplateTemplateArgs =
2618       Args.hasArg(OPT_frelaxed_template_template_args);
2619   Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
2620   Opts.AlignedAllocation =
2621       Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
2622                    Opts.AlignedAllocation);
2623   Opts.AlignedAllocationUnavailable =
2624       Opts.AlignedAllocation && Args.hasArg(OPT_aligned_alloc_unavailable);
2625   Opts.NewAlignOverride =
2626       getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
2627   if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
2628     Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
2629     Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
2630                                                  << A->getValue();
2631     Opts.NewAlignOverride = 0;
2632   }
2633   Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
2634   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2635   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2636   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2637   Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
2638   Opts.InstantiationDepth =
2639       getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
2640   Opts.ArrowDepth =
2641       getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
2642   Opts.ConstexprCallDepth =
2643       getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
2644   Opts.ConstexprStepLimit =
2645       getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
2646   Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
2647   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2648   Opts.NumLargeByValueCopy =
2649       getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
2650   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2651   Opts.ObjCConstantStringClass =
2652     Args.getLastArgValue(OPT_fconstant_string_class);
2653   Opts.ObjCDefaultSynthProperties =
2654     !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
2655   Opts.EncodeExtendedBlockSig =
2656     Args.hasArg(OPT_fencode_extended_block_signature);
2657   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2658   Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
2659   Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
2660   Opts.AlignDouble = Args.hasArg(OPT_malign_double);
2661   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2662   Opts.PIE = Args.hasArg(OPT_pic_is_pie);
2663   Opts.Static = Args.hasArg(OPT_static_define);
2664   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2665   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2666                         || Args.hasArg(OPT_fdump_record_layouts);
2667   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2668   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2669   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2670   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2671   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2672   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2673   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2674   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2675   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2676   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2677   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2678   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2679   Opts.ModuleName = Args.getLastArgValue(OPT_fmodule_name_EQ);
2680   Opts.CurrentModule = Opts.ModuleName;
2681   Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
2682   Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
2683   llvm::sort(Opts.ModuleFeatures);
2684   Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
2685   Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
2686   // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
2687   // is enabled.
2688   Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
2689                             | Opts.NativeHalfArgsAndReturns;
2690   Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
2691 
2692   // __declspec is enabled by default for the PS4 by the driver, and also
2693   // enabled for Microsoft Extensions or Borland Extensions, here.
2694   //
2695   // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
2696   // CUDA extension. However, it is required for supporting
2697   // __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
2698   // been rewritten in terms of something more generic, remove the Opts.CUDA
2699   // term here.
2700   Opts.DeclSpecKeyword =
2701       Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
2702                    (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
2703 
2704   if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
2705     switch (llvm::StringSwitch<unsigned>(A->getValue())
2706       .Case("target", LangOptions::ASMM_Target)
2707       .Case("no", LangOptions::ASMM_Off)
2708       .Case("yes", LangOptions::ASMM_On)
2709       .Default(255)) {
2710     default:
2711       Diags.Report(diag::err_drv_invalid_value)
2712         << "-faddress-space-map-mangling=" << A->getValue();
2713       break;
2714     case LangOptions::ASMM_Target:
2715       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
2716       break;
2717     case LangOptions::ASMM_On:
2718       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
2719       break;
2720     case LangOptions::ASMM_Off:
2721       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
2722       break;
2723     }
2724   }
2725 
2726   if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
2727     LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
2728         llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
2729             A->getValue())
2730             .Case("single",
2731                   LangOptions::PPTMK_FullGeneralitySingleInheritance)
2732             .Case("multiple",
2733                   LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2734             .Case("virtual",
2735                   LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2736             .Default(LangOptions::PPTMK_BestCase);
2737     if (InheritanceModel == LangOptions::PPTMK_BestCase)
2738       Diags.Report(diag::err_drv_invalid_value)
2739           << "-fms-memptr-rep=" << A->getValue();
2740 
2741     Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2742   }
2743 
2744   // Check for MS default calling conventions being specified.
2745   if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2746     LangOptions::DefaultCallingConvention DefaultCC =
2747         llvm::StringSwitch<LangOptions::DefaultCallingConvention>(A->getValue())
2748             .Case("cdecl", LangOptions::DCC_CDecl)
2749             .Case("fastcall", LangOptions::DCC_FastCall)
2750             .Case("stdcall", LangOptions::DCC_StdCall)
2751             .Case("vectorcall", LangOptions::DCC_VectorCall)
2752             .Case("regcall", LangOptions::DCC_RegCall)
2753             .Default(LangOptions::DCC_None);
2754     if (DefaultCC == LangOptions::DCC_None)
2755       Diags.Report(diag::err_drv_invalid_value)
2756           << "-fdefault-calling-conv=" << A->getValue();
2757 
2758     llvm::Triple T(TargetOpts.Triple);
2759     llvm::Triple::ArchType Arch = T.getArch();
2760     bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2761                       DefaultCC == LangOptions::DCC_StdCall) &&
2762                      Arch != llvm::Triple::x86;
2763     emitError |= (DefaultCC == LangOptions::DCC_VectorCall ||
2764                   DefaultCC == LangOptions::DCC_RegCall) &&
2765                  !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2766     if (emitError)
2767       Diags.Report(diag::err_drv_argument_not_allowed_with)
2768           << A->getSpelling() << T.getTriple();
2769     else
2770       Opts.setDefaultCallingConv(DefaultCC);
2771   }
2772 
2773   // -mrtd option
2774   if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2775     if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2776       Diags.Report(diag::err_drv_argument_not_allowed_with)
2777           << A->getSpelling() << "-fdefault-calling-conv";
2778     else {
2779       llvm::Triple T(TargetOpts.Triple);
2780       if (T.getArch() != llvm::Triple::x86)
2781         Diags.Report(diag::err_drv_argument_not_allowed_with)
2782             << A->getSpelling() << T.getTriple();
2783       else
2784         Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2785     }
2786   }
2787 
2788   // Check if -fopenmp is specified.
2789   Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2790   // Check if -fopenmp-simd is specified.
2791   bool IsSimdSpecified =
2792       Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
2793                    /*Default=*/false);
2794   Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
2795   Opts.OpenMPUseTLS =
2796       Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2797   Opts.OpenMPIsDevice =
2798       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2799   bool IsTargetSpecified =
2800       Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
2801 
2802   if (Opts.OpenMP || Opts.OpenMPSimd) {
2803     if (int Version = getLastArgIntValue(
2804             Args, OPT_fopenmp_version_EQ,
2805             (IsSimdSpecified || IsTargetSpecified) ? 45 : Opts.OpenMP, Diags))
2806       Opts.OpenMP = Version;
2807     else if (IsSimdSpecified || IsTargetSpecified)
2808       Opts.OpenMP = 45;
2809     // Provide diagnostic when a given target is not expected to be an OpenMP
2810     // device or host.
2811     if (!Opts.OpenMPIsDevice) {
2812       switch (T.getArch()) {
2813       default:
2814         break;
2815       // Add unsupported host targets here:
2816       case llvm::Triple::nvptx:
2817       case llvm::Triple::nvptx64:
2818         Diags.Report(diag::err_drv_omp_host_target_not_supported)
2819             << TargetOpts.Triple;
2820         break;
2821       }
2822     }
2823   }
2824 
2825   // Set the flag to prevent the implementation from emitting device exception
2826   // handling code for those requiring so.
2827   Opts.OpenMPHostCXXExceptions = Opts.Exceptions && Opts.CXXExceptions;
2828   if ((Opts.OpenMPIsDevice && T.isNVPTX()) || Opts.OpenCLCPlusPlus) {
2829     Opts.Exceptions = 0;
2830     Opts.CXXExceptions = 0;
2831   }
2832   if (Opts.OpenMPIsDevice && T.isNVPTX()) {
2833     Opts.OpenMPCUDANumSMs =
2834         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_number_of_sm_EQ,
2835                            Opts.OpenMPCUDANumSMs, Diags);
2836     Opts.OpenMPCUDABlocksPerSM =
2837         getLastArgIntValue(Args, options::OPT_fopenmp_cuda_blocks_per_sm_EQ,
2838                            Opts.OpenMPCUDABlocksPerSM, Diags);
2839   }
2840 
2841   // Get the OpenMP target triples if any.
2842   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2843 
2844     for (unsigned i = 0; i < A->getNumValues(); ++i) {
2845       llvm::Triple TT(A->getValue(i));
2846 
2847       if (TT.getArch() == llvm::Triple::UnknownArch ||
2848           !(TT.getArch() == llvm::Triple::ppc ||
2849             TT.getArch() == llvm::Triple::ppc64 ||
2850             TT.getArch() == llvm::Triple::ppc64le ||
2851             TT.getArch() == llvm::Triple::nvptx ||
2852             TT.getArch() == llvm::Triple::nvptx64 ||
2853             TT.getArch() == llvm::Triple::x86 ||
2854             TT.getArch() == llvm::Triple::x86_64))
2855         Diags.Report(diag::err_drv_invalid_omp_target) << A->getValue(i);
2856       else
2857         Opts.OMPTargetTriples.push_back(TT);
2858     }
2859   }
2860 
2861   // Get OpenMP host file path if any and report if a non existent file is
2862   // found
2863   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2864     Opts.OMPHostIRFile = A->getValue();
2865     if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2866       Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
2867           << Opts.OMPHostIRFile;
2868   }
2869 
2870   // Set CUDA mode for OpenMP target NVPTX if specified in options
2871   Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && T.isNVPTX() &&
2872                         Args.hasArg(options::OPT_fopenmp_cuda_mode);
2873 
2874   // Set CUDA mode for OpenMP target NVPTX if specified in options
2875   Opts.OpenMPCUDAForceFullRuntime =
2876       Opts.OpenMPIsDevice && T.isNVPTX() &&
2877       Args.hasArg(options::OPT_fopenmp_cuda_force_full_runtime);
2878 
2879   // Record whether the __DEPRECATED define was requested.
2880   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2881                                  OPT_fno_deprecated_macro,
2882                                  Opts.Deprecated);
2883 
2884   // FIXME: Eliminate this dependency.
2885   unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2886        OptSize = getOptimizationLevelSize(Args);
2887   Opts.Optimize = Opt != 0;
2888   Opts.OptimizeSize = OptSize != 0;
2889 
2890   // This is the __NO_INLINE__ define, which just depends on things like the
2891   // optimization level and -fno-inline, not actually whether the backend has
2892   // inlining enabled.
2893   Opts.NoInlineDefine = !Opts.Optimize;
2894   if (Arg *InlineArg = Args.getLastArg(
2895           options::OPT_finline_functions, options::OPT_finline_hint_functions,
2896           options::OPT_fno_inline_functions, options::OPT_fno_inline))
2897     if (InlineArg->getOption().matches(options::OPT_fno_inline))
2898       Opts.NoInlineDefine = true;
2899 
2900   Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2901       Args.hasArg(OPT_cl_fast_relaxed_math);
2902   Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2903       Args.hasArg(OPT_cl_finite_math_only) ||
2904       Args.hasArg(OPT_cl_fast_relaxed_math);
2905   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2906                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2907                       Args.hasArg(OPT_cl_fast_relaxed_math);
2908 
2909   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2910     StringRef Val = A->getValue();
2911     if (Val == "fast")
2912       Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
2913     else if (Val == "on")
2914       Opts.setDefaultFPContractMode(LangOptions::FPC_On);
2915     else if (Val == "off")
2916       Opts.setDefaultFPContractMode(LangOptions::FPC_Off);
2917     else
2918       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2919   }
2920 
2921   Opts.RetainCommentsFromSystemHeaders =
2922       Args.hasArg(OPT_fretain_comments_from_system_headers);
2923 
2924   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2925   switch (SSP) {
2926   default:
2927     Diags.Report(diag::err_drv_invalid_value)
2928       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2929     break;
2930   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2931   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2932   case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2933   case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2934   }
2935 
2936   // Parse -fsanitize= arguments.
2937   parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2938                       Diags, Opts.Sanitize);
2939   // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2940   Opts.SanitizeAddressFieldPadding =
2941       getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2942   Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2943 
2944   // -fxray-instrument
2945   Opts.XRayInstrument =
2946       Args.hasFlag(OPT_fxray_instrument, OPT_fnoxray_instrument, false);
2947 
2948   // -fxray-always-emit-customevents
2949   Opts.XRayAlwaysEmitCustomEvents =
2950       Args.hasFlag(OPT_fxray_always_emit_customevents,
2951                    OPT_fnoxray_always_emit_customevents, false);
2952 
2953   // -fxray-always-emit-typedevents
2954   Opts.XRayAlwaysEmitTypedEvents =
2955       Args.hasFlag(OPT_fxray_always_emit_typedevents,
2956                    OPT_fnoxray_always_emit_customevents, false);
2957 
2958   // -fxray-{always,never}-instrument= filenames.
2959   Opts.XRayAlwaysInstrumentFiles =
2960       Args.getAllArgValues(OPT_fxray_always_instrument);
2961   Opts.XRayNeverInstrumentFiles =
2962       Args.getAllArgValues(OPT_fxray_never_instrument);
2963   Opts.XRayAttrListFiles = Args.getAllArgValues(OPT_fxray_attr_list);
2964 
2965   // -fforce-emit-vtables
2966   Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
2967 
2968   // -fallow-editor-placeholders
2969   Opts.AllowEditorPlaceholders = Args.hasArg(OPT_fallow_editor_placeholders);
2970 
2971   Opts.RegisterStaticDestructors = !Args.hasArg(OPT_fno_cxx_static_destructors);
2972 
2973   if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
2974     Opts.setClangABICompat(LangOptions::ClangABI::Latest);
2975 
2976     StringRef Ver = A->getValue();
2977     std::pair<StringRef, StringRef> VerParts = Ver.split('.');
2978     unsigned Major, Minor = 0;
2979 
2980     // Check the version number is valid: either 3.x (0 <= x <= 9) or
2981     // y or y.0 (4 <= y <= current version).
2982     if (!VerParts.first.startswith("0") &&
2983         !VerParts.first.getAsInteger(10, Major) &&
2984         3 <= Major && Major <= CLANG_VERSION_MAJOR &&
2985         (Major == 3 ? VerParts.second.size() == 1 &&
2986                       !VerParts.second.getAsInteger(10, Minor)
2987                     : VerParts.first.size() == Ver.size() ||
2988                       VerParts.second == "0")) {
2989       // Got a valid version number.
2990       if (Major == 3 && Minor <= 8)
2991         Opts.setClangABICompat(LangOptions::ClangABI::Ver3_8);
2992       else if (Major <= 4)
2993         Opts.setClangABICompat(LangOptions::ClangABI::Ver4);
2994       else if (Major <= 6)
2995         Opts.setClangABICompat(LangOptions::ClangABI::Ver6);
2996       else if (Major <= 7)
2997         Opts.setClangABICompat(LangOptions::ClangABI::Ver7);
2998     } else if (Ver != "latest") {
2999       Diags.Report(diag::err_drv_invalid_value)
3000           << A->getAsString(Args) << A->getValue();
3001     }
3002   }
3003 
3004   Opts.CompleteMemberPointers = Args.hasArg(OPT_fcomplete_member_pointers);
3005   Opts.BuildingPCHWithObjectFile = Args.hasArg(OPT_building_pch_with_obj);
3006 }
3007 
3008 static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
3009   switch (Action) {
3010   case frontend::ASTDeclList:
3011   case frontend::ASTDump:
3012   case frontend::ASTPrint:
3013   case frontend::ASTView:
3014   case frontend::EmitAssembly:
3015   case frontend::EmitBC:
3016   case frontend::EmitHTML:
3017   case frontend::EmitLLVM:
3018   case frontend::EmitLLVMOnly:
3019   case frontend::EmitCodeGenOnly:
3020   case frontend::EmitObj:
3021   case frontend::FixIt:
3022   case frontend::GenerateModule:
3023   case frontend::GenerateModuleInterface:
3024   case frontend::GenerateHeaderModule:
3025   case frontend::GeneratePCH:
3026   case frontend::ParseSyntaxOnly:
3027   case frontend::ModuleFileInfo:
3028   case frontend::VerifyPCH:
3029   case frontend::PluginAction:
3030   case frontend::RewriteObjC:
3031   case frontend::RewriteTest:
3032   case frontend::RunAnalysis:
3033   case frontend::TemplightDump:
3034   case frontend::MigrateSource:
3035     return false;
3036 
3037   case frontend::DumpCompilerOptions:
3038   case frontend::DumpRawTokens:
3039   case frontend::DumpTokens:
3040   case frontend::InitOnly:
3041   case frontend::PrintPreamble:
3042   case frontend::PrintPreprocessedInput:
3043   case frontend::RewriteMacros:
3044   case frontend::RunPreprocessorOnly:
3045     return true;
3046   }
3047   llvm_unreachable("invalid frontend action");
3048 }
3049 
3050 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
3051                                   DiagnosticsEngine &Diags,
3052                                   frontend::ActionKind Action) {
3053   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
3054   Opts.PCHWithHdrStop = Args.hasArg(OPT_pch_through_hdrstop_create) ||
3055                         Args.hasArg(OPT_pch_through_hdrstop_use);
3056   Opts.PCHWithHdrStopCreate = Args.hasArg(OPT_pch_through_hdrstop_create);
3057   Opts.PCHThroughHeader = Args.getLastArgValue(OPT_pch_through_header_EQ);
3058   Opts.UsePredefines = !Args.hasArg(OPT_undef);
3059   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
3060   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
3061   Opts.AllowPCHWithCompilerErrors = Args.hasArg(OPT_fallow_pch_with_errors);
3062 
3063   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
3064   for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
3065     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
3066 
3067   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
3068     StringRef Value(A->getValue());
3069     size_t Comma = Value.find(',');
3070     unsigned Bytes = 0;
3071     unsigned EndOfLine = 0;
3072 
3073     if (Comma == StringRef::npos ||
3074         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
3075         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
3076       Diags.Report(diag::err_drv_preamble_format);
3077     else {
3078       Opts.PrecompiledPreambleBytes.first = Bytes;
3079       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
3080     }
3081   }
3082 
3083   // Add the __CET__ macro if a CFProtection option is set.
3084   if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
3085     StringRef Name = A->getValue();
3086     if (Name == "branch")
3087       Opts.addMacroDef("__CET__=1");
3088     else if (Name == "return")
3089       Opts.addMacroDef("__CET__=2");
3090     else if (Name == "full")
3091       Opts.addMacroDef("__CET__=3");
3092   }
3093 
3094   // Add macros from the command line.
3095   for (const auto *A : Args.filtered(OPT_D, OPT_U)) {
3096     if (A->getOption().matches(OPT_D))
3097       Opts.addMacroDef(A->getValue());
3098     else
3099       Opts.addMacroUndef(A->getValue());
3100   }
3101 
3102   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
3103 
3104   // Add the ordered list of -includes.
3105   for (const auto *A : Args.filtered(OPT_include))
3106     Opts.Includes.emplace_back(A->getValue());
3107 
3108   for (const auto *A : Args.filtered(OPT_chain_include))
3109     Opts.ChainedIncludes.emplace_back(A->getValue());
3110 
3111   for (const auto *A : Args.filtered(OPT_remap_file)) {
3112     std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
3113 
3114     if (Split.second.empty()) {
3115       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
3116       continue;
3117     }
3118 
3119     Opts.addRemappedFile(Split.first, Split.second);
3120   }
3121 
3122   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
3123     StringRef Name = A->getValue();
3124     unsigned Library = llvm::StringSwitch<unsigned>(Name)
3125       .Case("libc++", ARCXX_libcxx)
3126       .Case("libstdc++", ARCXX_libstdcxx)
3127       .Case("none", ARCXX_nolib)
3128       .Default(~0U);
3129     if (Library == ~0U)
3130       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
3131     else
3132       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
3133   }
3134 
3135   // Always avoid lexing editor placeholders when we're just running the
3136   // preprocessor as we never want to emit the
3137   // "editor placeholder in source file" error in PP only mode.
3138   if (isStrictlyPreprocessorAction(Action))
3139     Opts.LexEditorPlaceholders = false;
3140 }
3141 
3142 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
3143                                         ArgList &Args,
3144                                         frontend::ActionKind Action) {
3145   if (isStrictlyPreprocessorAction(Action))
3146     Opts.ShowCPP = !Args.hasArg(OPT_dM);
3147   else
3148     Opts.ShowCPP = 0;
3149 
3150   Opts.ShowComments = Args.hasArg(OPT_C);
3151   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
3152   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
3153   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
3154   Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
3155   Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
3156   Opts.RewriteImports = Args.hasArg(OPT_frewrite_imports);
3157   Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
3158 }
3159 
3160 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
3161                             DiagnosticsEngine &Diags) {
3162   Opts.CodeModel = getCodeModel(Args, Diags);
3163   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
3164   if (Arg *A = Args.getLastArg(OPT_meabi)) {
3165     StringRef Value = A->getValue();
3166     llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
3167                                  .Case("default", llvm::EABI::Default)
3168                                  .Case("4", llvm::EABI::EABI4)
3169                                  .Case("5", llvm::EABI::EABI5)
3170                                  .Case("gnu", llvm::EABI::GNU)
3171                                  .Default(llvm::EABI::Unknown);
3172     if (EABIVersion == llvm::EABI::Unknown)
3173       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
3174                                                 << Value;
3175     else
3176       Opts.EABIVersion = EABIVersion;
3177   }
3178   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
3179   Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
3180   Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
3181   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
3182   Opts.Triple = Args.getLastArgValue(OPT_triple);
3183   // Use the default target triple if unspecified.
3184   if (Opts.Triple.empty())
3185     Opts.Triple = llvm::sys::getDefaultTargetTriple();
3186   Opts.Triple = llvm::Triple::normalize(Opts.Triple);
3187   Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
3188   Opts.ForceEnableInt128 = Args.hasArg(OPT_fforce_enable_int128);
3189   Opts.NVPTXUseShortPointers = Args.hasFlag(
3190       options::OPT_fcuda_short_ptr, options::OPT_fno_cuda_short_ptr, false);
3191 }
3192 
3193 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
3194                                         const char *const *ArgBegin,
3195                                         const char *const *ArgEnd,
3196                                         DiagnosticsEngine &Diags) {
3197   bool Success = true;
3198 
3199   // Parse the arguments.
3200   std::unique_ptr<OptTable> Opts = createDriverOptTable();
3201   const unsigned IncludedFlagsBitmask = options::CC1Option;
3202   unsigned MissingArgIndex, MissingArgCount;
3203   InputArgList Args =
3204       Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
3205                       MissingArgCount, IncludedFlagsBitmask);
3206   LangOptions &LangOpts = *Res.getLangOpts();
3207 
3208   // Check for missing argument error.
3209   if (MissingArgCount) {
3210     Diags.Report(diag::err_drv_missing_argument)
3211         << Args.getArgString(MissingArgIndex) << MissingArgCount;
3212     Success = false;
3213   }
3214 
3215   // Issue errors on unknown arguments.
3216   for (const auto *A : Args.filtered(OPT_UNKNOWN)) {
3217     auto ArgString = A->getAsString(Args);
3218     std::string Nearest;
3219     if (Opts->findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
3220       Diags.Report(diag::err_drv_unknown_argument) << ArgString;
3221     else
3222       Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
3223           << ArgString << Nearest;
3224     Success = false;
3225   }
3226 
3227   Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
3228   Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
3229   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
3230   Success &=
3231       ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
3232                           false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
3233   ParseCommentArgs(LangOpts.CommentOpts, Args);
3234   ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
3235   // FIXME: We shouldn't have to pass the DashX option around here
3236   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
3237                                       LangOpts.IsHeaderFile);
3238   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
3239   Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
3240                               Res.getTargetOpts(), Res.getFrontendOpts());
3241   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
3242                         Res.getFileSystemOpts().WorkingDir);
3243   llvm::Triple T(Res.getTargetOpts().Triple);
3244   if (DashX.getFormat() == InputKind::Precompiled ||
3245       DashX.getLanguage() == InputKind::LLVM_IR) {
3246     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
3247     // PassManager in BackendUtil.cpp. They need to be initializd no matter
3248     // what the input type is.
3249     if (Args.hasArg(OPT_fobjc_arc))
3250       LangOpts.ObjCAutoRefCount = 1;
3251     // PIClevel and PIELevel are needed during code generation and this should be
3252     // set regardless of the input type.
3253     LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
3254     LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
3255     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3256                         Diags, LangOpts.Sanitize);
3257   } else {
3258     // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
3259     // FIXME: Should we really be calling this for an InputKind::Asm input?
3260     ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
3261                   Res.getPreprocessorOpts(), Diags);
3262     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
3263       LangOpts.ObjCExceptions = 1;
3264     if (T.isOSDarwin() && DashX.isPreprocessed()) {
3265       // Supress the darwin-specific 'stdlibcxx-not-found' diagnostic for
3266       // preprocessed input as we don't expect it to be used with -std=libc++
3267       // anyway.
3268       Res.getDiagnosticOpts().Warnings.push_back("no-stdlibcxx-not-found");
3269     }
3270   }
3271 
3272   LangOpts.FunctionAlignment =
3273       getLastArgIntValue(Args, OPT_function_alignment, 0, Diags);
3274 
3275   if (LangOpts.CUDA) {
3276     // During CUDA device-side compilation, the aux triple is the
3277     // triple used for host compilation.
3278     if (LangOpts.CUDAIsDevice)
3279       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
3280   }
3281 
3282   // Set the triple of the host for OpenMP device compile.
3283   if (LangOpts.OpenMPIsDevice)
3284     Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
3285 
3286   // FIXME: Override value name discarding when asan or msan is used because the
3287   // backend passes depend on the name of the alloca in order to print out
3288   // names.
3289   Res.getCodeGenOpts().DiscardValueNames &=
3290       !LangOpts.Sanitize.has(SanitizerKind::Address) &&
3291       !LangOpts.Sanitize.has(SanitizerKind::KernelAddress) &&
3292       !LangOpts.Sanitize.has(SanitizerKind::Memory) &&
3293       !LangOpts.Sanitize.has(SanitizerKind::KernelMemory);
3294 
3295   ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, Diags,
3296                         Res.getFrontendOpts().ProgramAction);
3297   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
3298                               Res.getFrontendOpts().ProgramAction);
3299 
3300   // Turn on -Wspir-compat for SPIR target.
3301   auto Arch = T.getArch();
3302   if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
3303     Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
3304   }
3305 
3306   // If sanitizer is enabled, disable OPT_ffine_grained_bitfield_accesses.
3307   if (Res.getCodeGenOpts().FineGrainedBitfieldAccesses &&
3308       !Res.getLangOpts()->Sanitize.empty()) {
3309     Res.getCodeGenOpts().FineGrainedBitfieldAccesses = false;
3310     Diags.Report(diag::warn_drv_fine_grained_bitfield_accesses_ignored);
3311   }
3312   return Success;
3313 }
3314 
3315 std::string CompilerInvocation::getModuleHash() const {
3316   // Note: For QoI reasons, the things we use as a hash here should all be
3317   // dumped via the -module-info flag.
3318   using llvm::hash_code;
3319   using llvm::hash_value;
3320   using llvm::hash_combine;
3321 
3322   // Start the signature with the compiler version.
3323   // FIXME: We'd rather use something more cryptographically sound than
3324   // CityHash, but this will do for now.
3325   hash_code code = hash_value(getClangFullRepositoryVersion());
3326 
3327   // Extend the signature with the language options
3328 #define LANGOPT(Name, Bits, Default, Description) \
3329    code = hash_combine(code, LangOpts->Name);
3330 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
3331   code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
3332 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
3333 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
3334 #include "clang/Basic/LangOptions.def"
3335 
3336   for (StringRef Feature : LangOpts->ModuleFeatures)
3337     code = hash_combine(code, Feature);
3338 
3339   // Extend the signature with the target options.
3340   code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
3341                       TargetOpts->ABI);
3342   for (const auto &FeatureAsWritten : TargetOpts->FeaturesAsWritten)
3343     code = hash_combine(code, FeatureAsWritten);
3344 
3345   // Extend the signature with preprocessor options.
3346   const PreprocessorOptions &ppOpts = getPreprocessorOpts();
3347   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
3348   code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
3349 
3350   for (const auto &I : getPreprocessorOpts().Macros) {
3351     // If we're supposed to ignore this macro for the purposes of modules,
3352     // don't put it into the hash.
3353     if (!hsOpts.ModulesIgnoreMacros.empty()) {
3354       // Check whether we're ignoring this macro.
3355       StringRef MacroDef = I.first;
3356       if (hsOpts.ModulesIgnoreMacros.count(
3357               llvm::CachedHashString(MacroDef.split('=').first)))
3358         continue;
3359     }
3360 
3361     code = hash_combine(code, I.first, I.second);
3362   }
3363 
3364   // Extend the signature with the sysroot and other header search options.
3365   code = hash_combine(code, hsOpts.Sysroot,
3366                       hsOpts.ModuleFormat,
3367                       hsOpts.UseDebugInfo,
3368                       hsOpts.UseBuiltinIncludes,
3369                       hsOpts.UseStandardSystemIncludes,
3370                       hsOpts.UseStandardCXXIncludes,
3371                       hsOpts.UseLibcxx,
3372                       hsOpts.ModulesValidateDiagnosticOptions);
3373   code = hash_combine(code, hsOpts.ResourceDir);
3374 
3375   // Extend the signature with the user build path.
3376   code = hash_combine(code, hsOpts.ModuleUserBuildPath);
3377 
3378   // Extend the signature with the module file extensions.
3379   const FrontendOptions &frontendOpts = getFrontendOpts();
3380   for (const auto &ext : frontendOpts.ModuleFileExtensions) {
3381     code = ext->hashExtension(code);
3382   }
3383 
3384   // When compiling with -gmodules, also hash -fdebug-prefix-map as it
3385   // affects the debug info in the PCM.
3386   if (getCodeGenOpts().DebugTypeExtRefs)
3387     for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
3388       code = hash_combine(code, KeyValue.first, KeyValue.second);
3389 
3390   // Extend the signature with the enabled sanitizers, if at least one is
3391   // enabled. Sanitizers which cannot affect AST generation aren't hashed.
3392   SanitizerSet SanHash = LangOpts->Sanitize;
3393   SanHash.clear(getPPTransparentSanitizers());
3394   if (!SanHash.empty())
3395     code = hash_combine(code, SanHash.Mask);
3396 
3397   return llvm::APInt(64, code).toString(36, /*Signed=*/false);
3398 }
3399 
3400 template<typename IntTy>
3401 static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
3402                                     IntTy Default,
3403                                     DiagnosticsEngine *Diags) {
3404   IntTy Res = Default;
3405   if (Arg *A = Args.getLastArg(Id)) {
3406     if (StringRef(A->getValue()).getAsInteger(10, Res)) {
3407       if (Diags)
3408         Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
3409                                                        << A->getValue();
3410     }
3411   }
3412   return Res;
3413 }
3414 
3415 namespace clang {
3416 
3417 // Declared in clang/Frontend/Utils.h.
3418 int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
3419                        DiagnosticsEngine *Diags) {
3420   return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
3421 }
3422 
3423 uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
3424                                uint64_t Default,
3425                                DiagnosticsEngine *Diags) {
3426   return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
3427 }
3428 
3429 IntrusiveRefCntPtr<llvm::vfs::FileSystem>
3430 createVFSFromCompilerInvocation(const CompilerInvocation &CI,
3431                                 DiagnosticsEngine &Diags) {
3432   return createVFSFromCompilerInvocation(CI, Diags,
3433                                          llvm::vfs::getRealFileSystem());
3434 }
3435 
3436 IntrusiveRefCntPtr<llvm::vfs::FileSystem> createVFSFromCompilerInvocation(
3437     const CompilerInvocation &CI, DiagnosticsEngine &Diags,
3438     IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
3439   if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
3440     return BaseFS;
3441 
3442   IntrusiveRefCntPtr<llvm::vfs::FileSystem> Result = BaseFS;
3443   // earlier vfs files are on the bottom
3444   for (const auto &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
3445     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
3446         Result->getBufferForFile(File);
3447     if (!Buffer) {
3448       Diags.Report(diag::err_missing_vfs_overlay_file) << File;
3449       continue;
3450     }
3451 
3452     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getVFSFromYAML(
3453         std::move(Buffer.get()), /*DiagHandler*/ nullptr, File,
3454         /*DiagContext*/ nullptr, Result);
3455     if (!FS) {
3456       Diags.Report(diag::err_invalid_vfs_overlay) << File;
3457       continue;
3458     }
3459 
3460     Result = FS;
3461   }
3462   return Result;
3463 }
3464 
3465 } // namespace clang
3466