xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 758aad76d88000fd9cada032fb4e7afa5e27e61c)
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/FileManager.h"
14 #include "clang/Basic/Version.h"
15 #include "clang/Config/config.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/Options.h"
18 #include "clang/Driver/Util.h"
19 #include "clang/Frontend/FrontendDiagnostic.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/Utils.h"
22 #include "clang/Lex/HeaderSearchOptions.h"
23 #include "clang/Lex/PreprocessorOptions.h"
24 #include "clang/Serialization/ASTReader.h"
25 #include "clang/Serialization/ModuleFileExtension.h"
26 #include "llvm/ADT/Hashing.h"
27 #include "llvm/ADT/STLExtras.h"
28 #include "llvm/ADT/SmallVector.h"
29 #include "llvm/ADT/StringExtras.h"
30 #include "llvm/ADT/StringSwitch.h"
31 #include "llvm/ADT/Triple.h"
32 #include "llvm/Linker/Linker.h"
33 #include "llvm/Option/Arg.h"
34 #include "llvm/Option/ArgList.h"
35 #include "llvm/Option/OptTable.h"
36 #include "llvm/Option/Option.h"
37 #include "llvm/ProfileData/InstrProfReader.h"
38 #include "llvm/Support/CodeGen.h"
39 #include "llvm/Support/ErrorHandling.h"
40 #include "llvm/Support/FileSystem.h"
41 #include "llvm/Support/Host.h"
42 #include "llvm/Support/Path.h"
43 #include "llvm/Support/Process.h"
44 #include "llvm/Target/TargetOptions.h"
45 #include "llvm/Support/ScopedPrinter.h"
46 #include <atomic>
47 #include <memory>
48 #include <sys/stat.h>
49 #include <system_error>
50 using namespace clang;
51 
52 //===----------------------------------------------------------------------===//
53 // Initialization.
54 //===----------------------------------------------------------------------===//
55 
56 CompilerInvocationBase::CompilerInvocationBase()
57   : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
58     DiagnosticOpts(new DiagnosticOptions()),
59     HeaderSearchOpts(new HeaderSearchOptions()),
60     PreprocessorOpts(new PreprocessorOptions()) {}
61 
62 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
63     : LangOpts(new LangOptions(*X.getLangOpts())),
64       TargetOpts(new TargetOptions(X.getTargetOpts())),
65       DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
66       HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
67       PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
68 
69 CompilerInvocationBase::~CompilerInvocationBase() {}
70 
71 //===----------------------------------------------------------------------===//
72 // Deserialization (from args)
73 //===----------------------------------------------------------------------===//
74 
75 using namespace clang::driver;
76 using namespace clang::driver::options;
77 using namespace llvm::opt;
78 
79 //
80 
81 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
82                                      DiagnosticsEngine &Diags) {
83   unsigned DefaultOpt = 0;
84   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
85     DefaultOpt = 2;
86 
87   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
88     if (A->getOption().matches(options::OPT_O0))
89       return 0;
90 
91     if (A->getOption().matches(options::OPT_Ofast))
92       return 3;
93 
94     assert (A->getOption().matches(options::OPT_O));
95 
96     StringRef S(A->getValue());
97     if (S == "s" || S == "z" || S.empty())
98       return 2;
99 
100     if (S == "g")
101       return 1;
102 
103     return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
104   }
105 
106   return DefaultOpt;
107 }
108 
109 static unsigned getOptimizationLevelSize(ArgList &Args) {
110   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
111     if (A->getOption().matches(options::OPT_O)) {
112       switch (A->getValue()[0]) {
113       default:
114         return 0;
115       case 's':
116         return 1;
117       case 'z':
118         return 2;
119       }
120     }
121   }
122   return 0;
123 }
124 
125 static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
126                               OptSpecifier GroupWithValue,
127                               std::vector<std::string> &Diagnostics) {
128   for (Arg *A : Args.filtered(Group)) {
129     if (A->getOption().getKind() == Option::FlagClass) {
130       // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
131       // its name (minus the "W" or "R" at the beginning) to the warning list.
132       Diagnostics.push_back(A->getOption().getName().drop_front(1));
133     } else if (A->getOption().matches(GroupWithValue)) {
134       // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
135       Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
136     } else {
137       // Otherwise, add its value (for OPT_W_Joined and similar).
138       for (const char *Arg : A->getValues())
139         Diagnostics.emplace_back(Arg);
140     }
141   }
142 }
143 
144 static void getAllNoBuiltinFuncValues(ArgList &Args,
145                                       std::vector<std::string> &Funcs) {
146   SmallVector<const char *, 8> Values;
147   for (const auto &Arg : Args) {
148     const Option &O = Arg->getOption();
149     if (O.matches(options::OPT_fno_builtin_)) {
150       const char *FuncName = Arg->getValue();
151       if (Builtin::Context::isBuiltinFunc(FuncName))
152         Values.push_back(FuncName);
153     }
154   }
155   Funcs.insert(Funcs.end(), Values.begin(), Values.end());
156 }
157 
158 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
159                               DiagnosticsEngine &Diags) {
160   using namespace options;
161   bool Success = true;
162   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
163     StringRef Name = A->getValue();
164     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
165 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
166       .Case(CMDFLAG, NAME##Model)
167 #include "clang/StaticAnalyzer/Core/Analyses.def"
168       .Default(NumStores);
169     if (Value == NumStores) {
170       Diags.Report(diag::err_drv_invalid_value)
171         << A->getAsString(Args) << Name;
172       Success = false;
173     } else {
174       Opts.AnalysisStoreOpt = Value;
175     }
176   }
177 
178   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
179     StringRef Name = A->getValue();
180     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
181 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
182       .Case(CMDFLAG, NAME##Model)
183 #include "clang/StaticAnalyzer/Core/Analyses.def"
184       .Default(NumConstraints);
185     if (Value == NumConstraints) {
186       Diags.Report(diag::err_drv_invalid_value)
187         << A->getAsString(Args) << Name;
188       Success = false;
189     } else {
190       Opts.AnalysisConstraintsOpt = Value;
191     }
192   }
193 
194   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
195     StringRef Name = A->getValue();
196     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
197 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
198       .Case(CMDFLAG, PD_##NAME)
199 #include "clang/StaticAnalyzer/Core/Analyses.def"
200       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
201     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
202       Diags.Report(diag::err_drv_invalid_value)
203         << A->getAsString(Args) << Name;
204       Success = false;
205     } else {
206       Opts.AnalysisDiagOpt = Value;
207     }
208   }
209 
210   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
211     StringRef Name = A->getValue();
212     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
213 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
214       .Case(CMDFLAG, NAME)
215 #include "clang/StaticAnalyzer/Core/Analyses.def"
216       .Default(NumPurgeModes);
217     if (Value == NumPurgeModes) {
218       Diags.Report(diag::err_drv_invalid_value)
219         << A->getAsString(Args) << Name;
220       Success = false;
221     } else {
222       Opts.AnalysisPurgeOpt = Value;
223     }
224   }
225 
226   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
227     StringRef Name = A->getValue();
228     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
229 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
230       .Case(CMDFLAG, NAME)
231 #include "clang/StaticAnalyzer/Core/Analyses.def"
232       .Default(NumInliningModes);
233     if (Value == NumInliningModes) {
234       Diags.Report(diag::err_drv_invalid_value)
235         << A->getAsString(Args) << Name;
236       Success = false;
237     } else {
238       Opts.InliningMode = Value;
239     }
240   }
241 
242   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
243   Opts.ShowEnabledCheckerList = Args.hasArg(OPT_analyzer_list_enabled_checkers);
244   Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
245 
246   Opts.visualizeExplodedGraphWithGraphViz =
247     Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
248   Opts.visualizeExplodedGraphWithUbiGraph =
249     Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
250   Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
251   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
252   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
253   Opts.AnalyzeNestedBlocks =
254     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
255   Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
256   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
257   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
258   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
259   Opts.maxBlockVisitOnPath =
260       getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
261   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
262   Opts.InlineMaxStackDepth =
263       getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
264                          Opts.InlineMaxStackDepth, Diags);
265 
266   Opts.CheckersControlList.clear();
267   for (const Arg *A :
268        Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
269     A->claim();
270     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
271     // We can have a list of comma separated checker names, e.g:
272     // '-analyzer-checker=cocoa,unix'
273     StringRef checkerList = A->getValue();
274     SmallVector<StringRef, 4> checkers;
275     checkerList.split(checkers, ",");
276     for (StringRef checker : checkers)
277       Opts.CheckersControlList.emplace_back(checker, enable);
278   }
279 
280   // Go through the analyzer configuration options.
281   for (const Arg *A : Args.filtered(OPT_analyzer_config)) {
282     A->claim();
283     // We can have a list of comma separated config names, e.g:
284     // '-analyzer-config key1=val1,key2=val2'
285     StringRef configList = A->getValue();
286     SmallVector<StringRef, 4> configVals;
287     configList.split(configVals, ",");
288     for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
289       StringRef key, val;
290       std::tie(key, val) = configVals[i].split("=");
291       if (val.empty()) {
292         Diags.Report(SourceLocation(),
293                      diag::err_analyzer_config_no_value) << configVals[i];
294         Success = false;
295         break;
296       }
297       if (val.find('=') != StringRef::npos) {
298         Diags.Report(SourceLocation(),
299                      diag::err_analyzer_config_multiple_values)
300           << configVals[i];
301         Success = false;
302         break;
303       }
304       Opts.Config[key] = val;
305     }
306   }
307 
308   return Success;
309 }
310 
311 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
312   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
313   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
314   return true;
315 }
316 
317 static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
318   Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
319   Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
320 }
321 
322 static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
323   if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
324     StringRef Value = A->getValue();
325     if (Value == "small" || Value == "kernel" || Value == "medium" ||
326         Value == "large")
327       return Value;
328     Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
329   }
330   return "default";
331 }
332 
333 /// \brief Create a new Regex instance out of the string value in \p RpassArg.
334 /// It returns a pointer to the newly generated Regex instance.
335 static std::shared_ptr<llvm::Regex>
336 GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
337                                 Arg *RpassArg) {
338   StringRef Val = RpassArg->getValue();
339   std::string RegexError;
340   std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
341   if (!Pattern->isValid(RegexError)) {
342     Diags.Report(diag::err_drv_optimization_remark_pattern)
343         << RegexError << RpassArg->getAsString(Args);
344     Pattern.reset();
345   }
346   return Pattern;
347 }
348 
349 static bool parseDiagnosticLevelMask(StringRef FlagName,
350                                      const std::vector<std::string> &Levels,
351                                      DiagnosticsEngine *Diags,
352                                      DiagnosticLevelMask &M) {
353   bool Success = true;
354   for (const auto &Level : Levels) {
355     DiagnosticLevelMask const PM =
356       llvm::StringSwitch<DiagnosticLevelMask>(Level)
357         .Case("note",    DiagnosticLevelMask::Note)
358         .Case("remark",  DiagnosticLevelMask::Remark)
359         .Case("warning", DiagnosticLevelMask::Warning)
360         .Case("error",   DiagnosticLevelMask::Error)
361         .Default(DiagnosticLevelMask::None);
362     if (PM == DiagnosticLevelMask::None) {
363       Success = false;
364       if (Diags)
365         Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
366     }
367     M = M | PM;
368   }
369   return Success;
370 }
371 
372 static void parseSanitizerKinds(StringRef FlagName,
373                                 const std::vector<std::string> &Sanitizers,
374                                 DiagnosticsEngine &Diags, SanitizerSet &S) {
375   for (const auto &Sanitizer : Sanitizers) {
376     SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
377     if (K == 0)
378       Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
379     else
380       S.set(K, true);
381   }
382 }
383 
384 // Set the profile kind for fprofile-instrument.
385 static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
386                                DiagnosticsEngine &Diags) {
387   Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
388   if (A == nullptr)
389     return;
390   StringRef S = A->getValue();
391   unsigned I = llvm::StringSwitch<unsigned>(S)
392                    .Case("none", CodeGenOptions::ProfileNone)
393                    .Case("clang", CodeGenOptions::ProfileClangInstr)
394                    .Case("llvm", CodeGenOptions::ProfileIRInstr)
395                    .Default(~0U);
396   if (I == ~0U) {
397     Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
398                                                          << S;
399     return;
400   }
401   CodeGenOptions::ProfileInstrKind Instrumentor =
402       static_cast<CodeGenOptions::ProfileInstrKind>(I);
403   Opts.setProfileInstr(Instrumentor);
404 }
405 
406 // Set the profile kind using fprofile-instrument-use-path.
407 static void setPGOUseInstrumentor(CodeGenOptions &Opts,
408                                   const Twine &ProfileName) {
409   auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
410   // In error, return silently and let Clang PGOUse report the error message.
411   if (auto E = ReaderOrErr.takeError()) {
412     llvm::consumeError(std::move(E));
413     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
414     return;
415   }
416   std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
417     std::move(ReaderOrErr.get());
418   if (PGOReader->isIRLevelProfile())
419     Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
420   else
421     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
422 }
423 
424 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
425                              DiagnosticsEngine &Diags,
426                              const TargetOptions &TargetOpts) {
427   using namespace options;
428   bool Success = true;
429   llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
430 
431   unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
432   // TODO: This could be done in Driver
433   unsigned MaxOptLevel = 3;
434   if (OptimizationLevel > MaxOptLevel) {
435     // If the optimization level is not supported, fall back on the default
436     // optimization
437     Diags.Report(diag::warn_drv_optimization_value)
438         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
439     OptimizationLevel = MaxOptLevel;
440   }
441   Opts.OptimizationLevel = OptimizationLevel;
442 
443   // At O0 we want to fully disable inlining outside of cases marked with
444   // 'alwaysinline' that are required for correctness.
445   Opts.setInlining((Opts.OptimizationLevel == 0)
446                        ? CodeGenOptions::OnlyAlwaysInlining
447                        : CodeGenOptions::NormalInlining);
448   // Explicit inlining flags can disable some or all inlining even at
449   // optimization levels above zero.
450   if (Arg *InlineArg = Args.getLastArg(
451           options::OPT_finline_functions, options::OPT_finline_hint_functions,
452           options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
453     if (Opts.OptimizationLevel > 0) {
454       const Option &InlineOpt = InlineArg->getOption();
455       if (InlineOpt.matches(options::OPT_finline_functions))
456         Opts.setInlining(CodeGenOptions::NormalInlining);
457       else if (InlineOpt.matches(options::OPT_finline_hint_functions))
458         Opts.setInlining(CodeGenOptions::OnlyHintInlining);
459       else
460         Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
461     }
462   }
463 
464   Opts.ExperimentalNewPassManager = Args.hasFlag(
465       OPT_fexperimental_new_pass_manager, OPT_fno_experimental_new_pass_manager,
466       /* Default */ false);
467 
468   if (Arg *A = Args.getLastArg(OPT_fveclib)) {
469     StringRef Name = A->getValue();
470     if (Name == "Accelerate")
471       Opts.setVecLib(CodeGenOptions::Accelerate);
472     else if (Name == "SVML")
473       Opts.setVecLib(CodeGenOptions::SVML);
474     else if (Name == "none")
475       Opts.setVecLib(CodeGenOptions::NoLibrary);
476     else
477       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
478   }
479 
480   if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
481     unsigned Val =
482         llvm::StringSwitch<unsigned>(A->getValue())
483             .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
484             .Case("limited", codegenoptions::LimitedDebugInfo)
485             .Case("standalone", codegenoptions::FullDebugInfo)
486             .Default(~0U);
487     if (Val == ~0U)
488       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
489                                                 << A->getValue();
490     else
491       Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
492   }
493   if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
494     unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
495                        .Case("gdb", unsigned(llvm::DebuggerKind::GDB))
496                        .Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
497                        .Case("sce", unsigned(llvm::DebuggerKind::SCE))
498                        .Default(~0U);
499     if (Val == ~0U)
500       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
501                                                 << A->getValue();
502     else
503       Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
504   }
505   Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
506   Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
507   Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
508   Opts.MacroDebugInfo = Args.hasArg(OPT_debug_info_macro);
509   Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
510   Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
511   Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
512   Opts.SplitDwarfInlining = !Args.hasArg(OPT_fno_split_dwarf_inlining);
513   Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
514   Opts.DebugExplicitImport = Triple.isPS4CPU();
515 
516   for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
517     Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
518 
519   if (const Arg *A =
520           Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
521     Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
522 
523   Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
524   Opts.DisableLifetimeMarkers = Args.hasArg(OPT_disable_lifetimemarkers);
525   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
526   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
527   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
528     OPT_fuse_register_sized_bitfield_access);
529   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
530   Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
531   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
532   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
533   Opts.NoCommon = Args.hasArg(OPT_fno_common);
534   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
535   Opts.OptimizeSize = getOptimizationLevelSize(Args);
536   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
537                             Args.hasArg(OPT_ffreestanding));
538   if (Opts.SimplifyLibCalls)
539     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
540   Opts.UnrollLoops =
541       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
542                    (Opts.OptimizationLevel > 1));
543   Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
544 
545   Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
546   Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
547   Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
548   Opts.DebugInfoForProfiling = Args.hasFlag(
549       OPT_fdebug_info_for_profiling, OPT_fno_debug_info_for_profiling, false);
550 
551   setPGOInstrumentor(Opts, Args, Diags);
552   Opts.InstrProfileOutput =
553       Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
554   Opts.ProfileInstrumentUsePath =
555       Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
556   if (!Opts.ProfileInstrumentUsePath.empty())
557     setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
558 
559   Opts.CoverageMapping =
560       Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
561   Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
562   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
563   Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
564   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
565   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
566   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
567   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
568   Opts.CodeModel = getCodeModel(Args, Diags);
569   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
570   Opts.DisableFPElim =
571       (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
572   Opts.DisableFree = Args.hasArg(OPT_disable_free);
573   Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
574   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
575   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
576   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
577   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
578   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
579                        Args.hasArg(OPT_cl_finite_math_only) ||
580                        Args.hasArg(OPT_cl_fast_relaxed_math));
581   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
582                        Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
583                        Args.hasArg(OPT_cl_finite_math_only) ||
584                        Args.hasArg(OPT_cl_fast_relaxed_math));
585   Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
586                         Args.hasArg(OPT_cl_no_signed_zeros));
587   Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero);
588   Opts.CorrectlyRoundedDivSqrt =
589       Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
590   Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
591   Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
592   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
593   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
594   Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
595   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
596   Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
597   Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
598   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
599   Opts.IncrementalLinkerCompatible =
600       Args.hasArg(OPT_mincremental_linker_compatible);
601   Opts.PIECopyRelocations =
602       Args.hasArg(OPT_mpie_copy_relocations);
603   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
604   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
605   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
606   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
607   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
608   Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
609   Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
610   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
611                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
612                       Args.hasArg(OPT_cl_fast_relaxed_math);
613   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
614   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
615   Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
616   if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
617     Diags.Report(diag::err_drv_invalid_value)
618         << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
619         << Opts.ThreadModel;
620   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
621   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
622 
623   Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
624                                        OPT_fno_function_sections, false);
625   Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
626                                    OPT_fno_data_sections, false);
627   Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
628                                          OPT_fno_unique_section_names, true);
629 
630   Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
631 
632   Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
633 
634   Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
635   const Arg *A = Args.getLastArg(OPT_flto, OPT_flto_EQ);
636   Opts.EmitSummaryIndex = A && A->containsValue("thin");
637   Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
638   if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
639     if (IK != IK_LLVM_IR)
640       Diags.Report(diag::err_drv_argument_only_allowed_with)
641           << A->getAsString(Args) << "-x ir";
642     Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
643   }
644 
645   Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
646 
647   Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
648   Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
649   Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
650 
651   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
652   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
653 
654   Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
655   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
656   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
657   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
658     Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
659     Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
660     Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
661     Opts.CoverageNoFunctionNamesInData =
662         Args.hasArg(OPT_coverage_no_function_names_in_data);
663     Opts.CoverageExitBlockBeforeBody =
664         Args.hasArg(OPT_coverage_exit_block_before_body);
665     if (Args.hasArg(OPT_coverage_version_EQ)) {
666       StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
667       if (CoverageVersion.size() != 4) {
668         Diags.Report(diag::err_drv_invalid_value)
669             << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
670             << CoverageVersion;
671       } else {
672         memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
673       }
674     }
675   }
676 	// Handle -fembed-bitcode option.
677   if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
678     StringRef Name = A->getValue();
679     unsigned Model = llvm::StringSwitch<unsigned>(Name)
680         .Case("off", CodeGenOptions::Embed_Off)
681         .Case("all", CodeGenOptions::Embed_All)
682         .Case("bitcode", CodeGenOptions::Embed_Bitcode)
683         .Case("marker", CodeGenOptions::Embed_Marker)
684         .Default(~0U);
685     if (Model == ~0U) {
686       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
687       Success = false;
688     } else
689       Opts.setEmbedBitcode(
690           static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
691   }
692   // FIXME: For backend options that are not yet recorded as function
693   // attributes in the IR, keep track of them so we can embed them in a
694   // separate data section and use them when building the bitcode.
695   if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
696     for (const auto &A : Args) {
697       // Do not encode output and input.
698       if (A->getOption().getID() == options::OPT_o ||
699           A->getOption().getID() == options::OPT_INPUT ||
700           A->getOption().getID() == options::OPT_x ||
701           A->getOption().getID() == options::OPT_fembed_bitcode ||
702           (A->getOption().getGroup().isValid() &&
703            A->getOption().getGroup().getID() == options::OPT_W_Group))
704         continue;
705       ArgStringList ASL;
706       A->render(Args, ASL);
707       for (const auto &arg : ASL) {
708         StringRef ArgStr(arg);
709         Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
710         // using \00 to seperate each commandline options.
711         Opts.CmdArgs.push_back('\0');
712       }
713     }
714   }
715 
716   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
717   Opts.XRayInstrumentFunctions = Args.hasArg(OPT_fxray_instrument);
718   Opts.XRayInstructionThreshold =
719       getLastArgIntValue(Args, OPT_fxray_instruction_threshold_, 200, Diags);
720   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
721   Opts.CallFEntry = Args.hasArg(OPT_mfentry);
722   Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
723   Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
724   Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
725   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
726   for (auto A : Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_cuda_bitcode)) {
727     CodeGenOptions::BitcodeFileToLink F;
728     F.Filename = A->getValue();
729     if (A->getOption().matches(OPT_mlink_cuda_bitcode)) {
730       F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
731       // When linking CUDA bitcode, propagate function attributes so that
732       // e.g. libdevice gets fast-math attrs if we're building with fast-math.
733       F.PropagateAttrs = true;
734       F.Internalize = true;
735     }
736     Opts.LinkBitcodeFiles.push_back(F);
737   }
738   Opts.SanitizeCoverageType =
739       getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
740   Opts.SanitizeCoverageIndirectCalls =
741       Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
742   Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
743   Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
744   Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
745   Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
746   Opts.SanitizeCoverage8bitCounters =
747       Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
748   Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
749   Opts.SanitizeCoverageTracePCGuard =
750       Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
751   Opts.SanitizeMemoryTrackOrigins =
752       getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
753   Opts.SanitizeMemoryUseAfterDtor =
754       Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
755   Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
756   Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
757   if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
758                                OPT_fno_sanitize_address_use_after_scope)) {
759     Opts.SanitizeAddressUseAfterScope =
760         A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
761   }
762   Opts.SSPBufferSize =
763       getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
764   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
765   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
766     StringRef Val = A->getValue();
767     unsigned StackAlignment = Opts.StackAlignment;
768     Val.getAsInteger(10, StackAlignment);
769     Opts.StackAlignment = StackAlignment;
770   }
771 
772   if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
773     StringRef Val = A->getValue();
774     unsigned StackProbeSize = Opts.StackProbeSize;
775     Val.getAsInteger(0, StackProbeSize);
776     Opts.StackProbeSize = StackProbeSize;
777   }
778 
779   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
780     StringRef Name = A->getValue();
781     unsigned Method = llvm::StringSwitch<unsigned>(Name)
782       .Case("legacy", CodeGenOptions::Legacy)
783       .Case("non-legacy", CodeGenOptions::NonLegacy)
784       .Case("mixed", CodeGenOptions::Mixed)
785       .Default(~0U);
786     if (Method == ~0U) {
787       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
788       Success = false;
789     } else {
790       Opts.setObjCDispatchMethod(
791         static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
792     }
793   }
794 
795   Opts.EmulatedTLS =
796       Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
797 
798   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
799     StringRef Name = A->getValue();
800     unsigned Model = llvm::StringSwitch<unsigned>(Name)
801         .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
802         .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
803         .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
804         .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
805         .Default(~0U);
806     if (Model == ~0U) {
807       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
808       Success = false;
809     } else {
810       Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
811     }
812   }
813 
814   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
815     StringRef Val = A->getValue();
816     if (Val == "fast")
817       Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
818     else if (Val == "on")
819       Opts.setFPContractMode(CodeGenOptions::FPC_On);
820     else if (Val == "off")
821       Opts.setFPContractMode(CodeGenOptions::FPC_Off);
822     else
823       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
824   }
825 
826   if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
827     StringRef Val = A->getValue();
828     if (Val == "ieee")
829       Opts.FPDenormalMode = "ieee";
830     else if (Val == "preserve-sign")
831       Opts.FPDenormalMode = "preserve-sign";
832     else if (Val == "positive-zero")
833       Opts.FPDenormalMode = "positive-zero";
834     else
835       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
836   }
837 
838   if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
839     if (A->getOption().matches(OPT_fpcc_struct_return)) {
840       Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
841     } else {
842       assert(A->getOption().matches(OPT_freg_struct_return));
843       Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
844     }
845   }
846 
847   Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
848   Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
849   bool NeedLocTracking = false;
850 
851   Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
852   if (!Opts.OptRecordFile.empty())
853     NeedLocTracking = true;
854 
855   if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
856     Opts.OptimizationRemarkPattern =
857         GenerateOptimizationRemarkRegex(Diags, Args, A);
858     NeedLocTracking = true;
859   }
860 
861   if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
862     Opts.OptimizationRemarkMissedPattern =
863         GenerateOptimizationRemarkRegex(Diags, Args, A);
864     NeedLocTracking = true;
865   }
866 
867   if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
868     Opts.OptimizationRemarkAnalysisPattern =
869         GenerateOptimizationRemarkRegex(Diags, Args, A);
870     NeedLocTracking = true;
871   }
872 
873   Opts.DiagnosticsWithHotness =
874       Args.hasArg(options::OPT_fdiagnostics_show_hotness);
875   if (Opts.DiagnosticsWithHotness &&
876       Opts.getProfileUse() == CodeGenOptions::ProfileNone)
877     Diags.Report(diag::warn_drv_fdiagnostics_show_hotness_requires_pgo);
878 
879   // If the user requested to use a sample profile for PGO, then the
880   // backend will need to track source location information so the profile
881   // can be incorporated into the IR.
882   if (!Opts.SampleProfileFile.empty())
883     NeedLocTracking = true;
884 
885   // If the user requested a flag that requires source locations available in
886   // the backend, make sure that the backend tracks source location information.
887   if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
888     Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
889 
890   Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
891 
892   // Parse -fsanitize-recover= arguments.
893   // FIXME: Report unrecoverable sanitizers incorrectly specified here.
894   parseSanitizerKinds("-fsanitize-recover=",
895                       Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
896                       Opts.SanitizeRecover);
897   parseSanitizerKinds("-fsanitize-trap=",
898                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
899                       Opts.SanitizeTrap);
900 
901   Opts.CudaGpuBinaryFileNames =
902       Args.getAllArgValues(OPT_fcuda_include_gpubinary);
903 
904   Opts.Backchain = Args.hasArg(OPT_mbackchain);
905 
906   Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
907       Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
908 
909   return Success;
910 }
911 
912 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
913                                       ArgList &Args) {
914   using namespace options;
915   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
916   Opts.Targets = Args.getAllArgValues(OPT_MT);
917   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
918   Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
919   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
920   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
921   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
922   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
923   Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
924   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
925   Opts.ModuleDependencyOutputDir =
926       Args.getLastArgValue(OPT_module_dependency_dir);
927   if (Args.hasArg(OPT_MV))
928     Opts.OutputFormat = DependencyOutputFormat::NMake;
929   // Add sanitizer blacklists as extra dependencies.
930   // They won't be discovered by the regular preprocessor, so
931   // we let make / ninja to know about this implicit dependency.
932   Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
933   auto ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
934   Opts.ExtraDeps.insert(Opts.ExtraDeps.end(), ModuleFiles.begin(),
935                         ModuleFiles.end());
936 }
937 
938 static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
939   // Color diagnostics default to auto ("on" if terminal supports) in the driver
940   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
941   // Support both clang's -f[no-]color-diagnostics and gcc's
942   // -f[no-]diagnostics-colors[=never|always|auto].
943   enum {
944     Colors_On,
945     Colors_Off,
946     Colors_Auto
947   } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
948   for (Arg *A : Args) {
949     const Option &O = A->getOption();
950     if (O.matches(options::OPT_fcolor_diagnostics) ||
951         O.matches(options::OPT_fdiagnostics_color)) {
952       ShowColors = Colors_On;
953     } else if (O.matches(options::OPT_fno_color_diagnostics) ||
954                O.matches(options::OPT_fno_diagnostics_color)) {
955       ShowColors = Colors_Off;
956     } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
957       StringRef Value(A->getValue());
958       if (Value == "always")
959         ShowColors = Colors_On;
960       else if (Value == "never")
961         ShowColors = Colors_Off;
962       else if (Value == "auto")
963         ShowColors = Colors_Auto;
964     }
965   }
966   return ShowColors == Colors_On ||
967          (ShowColors == Colors_Auto &&
968           llvm::sys::Process::StandardErrHasColors());
969 }
970 
971 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
972                                 DiagnosticsEngine *Diags,
973                                 bool DefaultDiagColor, bool DefaultShowOpt) {
974   using namespace options;
975   bool Success = true;
976 
977   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
978   if (Arg *A =
979           Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
980     Opts.DiagnosticSerializationFile = A->getValue();
981   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
982   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
983   Opts.Pedantic = Args.hasArg(OPT_pedantic);
984   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
985   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
986   Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
987   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
988                                  OPT_fno_show_column,
989                                  /*Default=*/true);
990   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
991   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
992   Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
993   Opts.ShowOptionNames =
994       Args.hasFlag(OPT_fdiagnostics_show_option,
995                    OPT_fno_diagnostics_show_option, DefaultShowOpt);
996 
997   llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
998 
999   // Default behavior is to not to show note include stacks.
1000   Opts.ShowNoteIncludeStack = false;
1001   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1002                                OPT_fno_diagnostics_show_note_include_stack))
1003     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1004       Opts.ShowNoteIncludeStack = true;
1005 
1006   StringRef ShowOverloads =
1007     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1008   if (ShowOverloads == "best")
1009     Opts.setShowOverloads(Ovl_Best);
1010   else if (ShowOverloads == "all")
1011     Opts.setShowOverloads(Ovl_All);
1012   else {
1013     Success = false;
1014     if (Diags)
1015       Diags->Report(diag::err_drv_invalid_value)
1016       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1017       << ShowOverloads;
1018   }
1019 
1020   StringRef ShowCategory =
1021     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1022   if (ShowCategory == "none")
1023     Opts.ShowCategories = 0;
1024   else if (ShowCategory == "id")
1025     Opts.ShowCategories = 1;
1026   else if (ShowCategory == "name")
1027     Opts.ShowCategories = 2;
1028   else {
1029     Success = false;
1030     if (Diags)
1031       Diags->Report(diag::err_drv_invalid_value)
1032       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1033       << ShowCategory;
1034   }
1035 
1036   StringRef Format =
1037     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1038   if (Format == "clang")
1039     Opts.setFormat(DiagnosticOptions::Clang);
1040   else if (Format == "msvc")
1041     Opts.setFormat(DiagnosticOptions::MSVC);
1042   else if (Format == "msvc-fallback") {
1043     Opts.setFormat(DiagnosticOptions::MSVC);
1044     Opts.CLFallbackMode = true;
1045   } else if (Format == "vi")
1046     Opts.setFormat(DiagnosticOptions::Vi);
1047   else {
1048     Success = false;
1049     if (Diags)
1050       Diags->Report(diag::err_drv_invalid_value)
1051       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1052       << Format;
1053   }
1054 
1055   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1056   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1057   Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1058   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1059   DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1060   Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1061     Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1062     Diags, DiagMask);
1063   if (Args.hasArg(OPT_verify_ignore_unexpected))
1064     DiagMask = DiagnosticLevelMask::All;
1065   Opts.setVerifyIgnoreUnexpected(DiagMask);
1066   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1067   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1068   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1069   Opts.MacroBacktraceLimit =
1070       getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1071                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1072   Opts.TemplateBacktraceLimit = getLastArgIntValue(
1073       Args, OPT_ftemplate_backtrace_limit,
1074       DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1075   Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1076       Args, OPT_fconstexpr_backtrace_limit,
1077       DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1078   Opts.SpellCheckingLimit = getLastArgIntValue(
1079       Args, OPT_fspell_checking_limit,
1080       DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1081   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1082                                     DiagnosticOptions::DefaultTabStop, Diags);
1083   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1084     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1085     if (Diags)
1086       Diags->Report(diag::warn_ignoring_ftabstop_value)
1087       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1088   }
1089   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1090   addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1091   addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1092 
1093   return Success;
1094 }
1095 
1096 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1097   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1098 }
1099 
1100 /// Parse the argument to the -ftest-module-file-extension
1101 /// command-line argument.
1102 ///
1103 /// \returns true on error, false on success.
1104 static bool parseTestModuleFileExtensionArg(StringRef Arg,
1105                                             std::string &BlockName,
1106                                             unsigned &MajorVersion,
1107                                             unsigned &MinorVersion,
1108                                             bool &Hashed,
1109                                             std::string &UserInfo) {
1110   SmallVector<StringRef, 5> Args;
1111   Arg.split(Args, ':', 5);
1112   if (Args.size() < 5)
1113     return true;
1114 
1115   BlockName = Args[0];
1116   if (Args[1].getAsInteger(10, MajorVersion)) return true;
1117   if (Args[2].getAsInteger(10, MinorVersion)) return true;
1118   if (Args[3].getAsInteger(2, Hashed)) return true;
1119   if (Args.size() > 4)
1120     UserInfo = Args[4];
1121   return false;
1122 }
1123 
1124 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1125                                    DiagnosticsEngine &Diags,
1126                                    bool &IsHeaderFile) {
1127   using namespace options;
1128   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1129   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1130     switch (A->getOption().getID()) {
1131     default:
1132       llvm_unreachable("Invalid option in group!");
1133     case OPT_ast_list:
1134       Opts.ProgramAction = frontend::ASTDeclList; break;
1135     case OPT_ast_dump:
1136     case OPT_ast_dump_all:
1137     case OPT_ast_dump_lookups:
1138       Opts.ProgramAction = frontend::ASTDump; break;
1139     case OPT_ast_print:
1140       Opts.ProgramAction = frontend::ASTPrint; break;
1141     case OPT_ast_view:
1142       Opts.ProgramAction = frontend::ASTView; break;
1143     case OPT_dump_raw_tokens:
1144       Opts.ProgramAction = frontend::DumpRawTokens; break;
1145     case OPT_dump_tokens:
1146       Opts.ProgramAction = frontend::DumpTokens; break;
1147     case OPT_S:
1148       Opts.ProgramAction = frontend::EmitAssembly; break;
1149     case OPT_emit_llvm_bc:
1150       Opts.ProgramAction = frontend::EmitBC; break;
1151     case OPT_emit_html:
1152       Opts.ProgramAction = frontend::EmitHTML; break;
1153     case OPT_emit_llvm:
1154       Opts.ProgramAction = frontend::EmitLLVM; break;
1155     case OPT_emit_llvm_only:
1156       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1157     case OPT_emit_codegen_only:
1158       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1159     case OPT_emit_obj:
1160       Opts.ProgramAction = frontend::EmitObj; break;
1161     case OPT_fixit_EQ:
1162       Opts.FixItSuffix = A->getValue();
1163       // fall-through!
1164     case OPT_fixit:
1165       Opts.ProgramAction = frontend::FixIt; break;
1166     case OPT_emit_module:
1167       Opts.ProgramAction = frontend::GenerateModule; break;
1168     case OPT_emit_module_interface:
1169       Opts.ProgramAction = frontend::GenerateModuleInterface; break;
1170     case OPT_emit_pch:
1171       Opts.ProgramAction = frontend::GeneratePCH; break;
1172     case OPT_emit_pth:
1173       Opts.ProgramAction = frontend::GeneratePTH; break;
1174     case OPT_init_only:
1175       Opts.ProgramAction = frontend::InitOnly; break;
1176     case OPT_fsyntax_only:
1177       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1178     case OPT_module_file_info:
1179       Opts.ProgramAction = frontend::ModuleFileInfo; break;
1180     case OPT_verify_pch:
1181       Opts.ProgramAction = frontend::VerifyPCH; break;
1182     case OPT_print_decl_contexts:
1183       Opts.ProgramAction = frontend::PrintDeclContext; break;
1184     case OPT_print_preamble:
1185       Opts.ProgramAction = frontend::PrintPreamble; break;
1186     case OPT_E:
1187       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1188     case OPT_rewrite_macros:
1189       Opts.ProgramAction = frontend::RewriteMacros; break;
1190     case OPT_rewrite_objc:
1191       Opts.ProgramAction = frontend::RewriteObjC; break;
1192     case OPT_rewrite_test:
1193       Opts.ProgramAction = frontend::RewriteTest; break;
1194     case OPT_analyze:
1195       Opts.ProgramAction = frontend::RunAnalysis; break;
1196     case OPT_migrate:
1197       Opts.ProgramAction = frontend::MigrateSource; break;
1198     case OPT_Eonly:
1199       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1200     }
1201   }
1202 
1203   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1204     Opts.Plugins.emplace_back(A->getValue(0));
1205     Opts.ProgramAction = frontend::PluginAction;
1206     Opts.ActionName = A->getValue();
1207   }
1208   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1209   for (const Arg *AA : Args.filtered(OPT_plugin_arg))
1210     Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1211 
1212   for (const std::string &Arg :
1213          Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1214     std::string BlockName;
1215     unsigned MajorVersion;
1216     unsigned MinorVersion;
1217     bool Hashed;
1218     std::string UserInfo;
1219     if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1220                                         MinorVersion, Hashed, UserInfo)) {
1221       Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1222 
1223       continue;
1224     }
1225 
1226     // Add the testing module file extension.
1227     Opts.ModuleFileExtensions.push_back(
1228         std::make_shared<TestModuleFileExtension>(
1229             BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
1230   }
1231 
1232   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1233     Opts.CodeCompletionAt =
1234       ParsedSourceLocation::FromString(A->getValue());
1235     if (Opts.CodeCompletionAt.FileName.empty())
1236       Diags.Report(diag::err_drv_invalid_value)
1237         << A->getAsString(Args) << A->getValue();
1238   }
1239   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1240 
1241   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1242   Opts.Plugins = Args.getAllArgValues(OPT_load);
1243   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1244   Opts.ShowHelp = Args.hasArg(OPT_help);
1245   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1246   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1247   Opts.ShowVersion = Args.hasArg(OPT_version);
1248   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1249   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1250   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1251   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1252   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1253   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1254   Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1255   Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all);
1256   Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1257   Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1258   Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1259   Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1260   Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1261   Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1262   Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1263   Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1264   Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1265 
1266   Opts.CodeCompleteOpts.IncludeMacros
1267     = Args.hasArg(OPT_code_completion_macros);
1268   Opts.CodeCompleteOpts.IncludeCodePatterns
1269     = Args.hasArg(OPT_code_completion_patterns);
1270   Opts.CodeCompleteOpts.IncludeGlobals
1271     = !Args.hasArg(OPT_no_code_completion_globals);
1272   Opts.CodeCompleteOpts.IncludeBriefComments
1273     = Args.hasArg(OPT_code_completion_brief_comments);
1274 
1275   Opts.OverrideRecordLayoutsFile
1276     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1277   Opts.AuxTriple =
1278       llvm::Triple::normalize(Args.getLastArgValue(OPT_aux_triple));
1279   Opts.FindPchSource = Args.getLastArgValue(OPT_find_pch_source_EQ);
1280   Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
1281 
1282   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1283                                      OPT_arcmt_modify,
1284                                      OPT_arcmt_migrate)) {
1285     switch (A->getOption().getID()) {
1286     default:
1287       llvm_unreachable("missed a case");
1288     case OPT_arcmt_check:
1289       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1290       break;
1291     case OPT_arcmt_modify:
1292       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1293       break;
1294     case OPT_arcmt_migrate:
1295       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1296       break;
1297     }
1298   }
1299   Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1300   Opts.ARCMTMigrateReportOut
1301     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1302   Opts.ARCMTMigrateEmitARCErrors
1303     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1304 
1305   if (Args.hasArg(OPT_objcmt_migrate_literals))
1306     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1307   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1308     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1309   if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1310     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1311   if (Args.hasArg(OPT_objcmt_migrate_property))
1312     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1313   if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1314     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1315   if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1316     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1317   if (Args.hasArg(OPT_objcmt_migrate_annotation))
1318     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1319   if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1320     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1321   if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1322     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1323   if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1324     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1325   if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1326     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1327   if (Args.hasArg(OPT_objcmt_atomic_property))
1328     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1329   if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1330     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1331   if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1332     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1333   if (Args.hasArg(OPT_objcmt_migrate_all))
1334     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1335 
1336   Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1337 
1338   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1339       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1340     Diags.Report(diag::err_drv_argument_not_allowed_with)
1341       << "ARC migration" << "ObjC migration";
1342   }
1343 
1344   InputKind DashX = IK_None;
1345   if (const Arg *A = Args.getLastArg(OPT_x)) {
1346     DashX = llvm::StringSwitch<InputKind>(A->getValue())
1347       .Case("c", IK_C)
1348       .Case("cl", IK_OpenCL)
1349       .Case("cuda", IK_CUDA)
1350       .Case("c++", IK_CXX)
1351       .Case("c++-module", IK_CXX)
1352       .Case("objective-c", IK_ObjC)
1353       .Case("objective-c++", IK_ObjCXX)
1354       .Case("cpp-output", IK_PreprocessedC)
1355       .Case("assembler-with-cpp", IK_Asm)
1356       .Case("c++-cpp-output", IK_PreprocessedCXX)
1357       .Case("c++-module-cpp-output", IK_PreprocessedCXX)
1358       .Case("cuda-cpp-output", IK_PreprocessedCuda)
1359       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1360       .Case("objc-cpp-output", IK_PreprocessedObjC)
1361       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1362       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1363       .Case("c-header", IK_C)
1364       .Case("cl-header", IK_OpenCL)
1365       .Case("objective-c-header", IK_ObjC)
1366       .Case("c++-header", IK_CXX)
1367       .Case("objective-c++-header", IK_ObjCXX)
1368       .Cases("ast", "pcm", IK_AST)
1369       .Case("ir", IK_LLVM_IR)
1370       .Case("renderscript", IK_RenderScript)
1371       .Default(IK_None);
1372     if (DashX == IK_None)
1373       Diags.Report(diag::err_drv_invalid_value)
1374         << A->getAsString(Args) << A->getValue();
1375     IsHeaderFile = llvm::StringSwitch<bool>(A->getValue())
1376       .Case("c-header", true)
1377       .Case("cl-header", true)
1378       .Case("objective-c-header", true)
1379       .Case("c++-header", true)
1380       .Case("objective-c++-header", true)
1381       .Default(false);
1382   }
1383 
1384   // '-' is the default input if none is given.
1385   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1386   Opts.Inputs.clear();
1387   if (Inputs.empty())
1388     Inputs.push_back("-");
1389   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1390     InputKind IK = DashX;
1391     if (IK == IK_None) {
1392       IK = FrontendOptions::getInputKindForExtension(
1393         StringRef(Inputs[i]).rsplit('.').second);
1394       // FIXME: Remove this hack.
1395       if (i == 0)
1396         DashX = IK;
1397     }
1398     Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1399   }
1400 
1401   return DashX;
1402 }
1403 
1404 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1405                                                  void *MainAddr) {
1406   std::string ClangExecutable =
1407       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1408   StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1409 
1410   // Compute the path to the resource directory.
1411   StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1412   SmallString<128> P(Dir);
1413   if (ClangResourceDir != "")
1414     llvm::sys::path::append(P, ClangResourceDir);
1415   else
1416     llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1417                             "clang", CLANG_VERSION_STRING);
1418 
1419   return P.str();
1420 }
1421 
1422 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
1423                                   const std::string &WorkingDir) {
1424   using namespace options;
1425   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1426   Opts.Verbose = Args.hasArg(OPT_v);
1427   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1428   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1429   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1430   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1431     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1432   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1433 
1434   // Canonicalize -fmodules-cache-path before storing it.
1435   SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
1436   if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
1437     if (WorkingDir.empty())
1438       llvm::sys::fs::make_absolute(P);
1439     else
1440       llvm::sys::fs::make_absolute(WorkingDir, P);
1441   }
1442   llvm::sys::path::remove_dots(P);
1443   Opts.ModuleCachePath = P.str();
1444 
1445   Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1446   for (const Arg *A : Args.filtered(OPT_fprebuilt_module_path))
1447     Opts.AddPrebuiltModulePath(A->getValue());
1448   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1449   Opts.ModulesHashContent = Args.hasArg(OPT_fmodules_hash_content);
1450   Opts.ModulesValidateDiagnosticOptions =
1451       !Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
1452   Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1453   Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1454   Opts.ModuleCachePruneInterval =
1455       getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1456   Opts.ModuleCachePruneAfter =
1457       getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1458   Opts.ModulesValidateOncePerBuildSession =
1459       Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1460   Opts.BuildSessionTimestamp =
1461       getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1462   Opts.ModulesValidateSystemHeaders =
1463       Args.hasArg(OPT_fmodules_validate_system_headers);
1464   if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1465     Opts.ModuleFormat = A->getValue();
1466 
1467   for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1468     StringRef MacroDef = A->getValue();
1469     Opts.ModulesIgnoreMacros.insert(
1470         llvm::CachedHashString(MacroDef.split('=').first));
1471   }
1472 
1473   // Add -I..., -F..., and -index-header-map options in order.
1474   bool IsIndexHeaderMap = false;
1475   bool IsSysrootSpecified =
1476       Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1477   for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1478     if (A->getOption().matches(OPT_index_header_map)) {
1479       // -index-header-map applies to the next -I or -F.
1480       IsIndexHeaderMap = true;
1481       continue;
1482     }
1483 
1484     frontend::IncludeDirGroup Group =
1485         IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1486 
1487     bool IsFramework = A->getOption().matches(OPT_F);
1488     std::string Path = A->getValue();
1489 
1490     if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1491       SmallString<32> Buffer;
1492       llvm::sys::path::append(Buffer, Opts.Sysroot,
1493                               llvm::StringRef(A->getValue()).substr(1));
1494       Path = Buffer.str();
1495     }
1496 
1497     Opts.AddPath(Path, Group, IsFramework,
1498                  /*IgnoreSysroot*/ true);
1499     IsIndexHeaderMap = false;
1500   }
1501 
1502   // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1503   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1504   for (const Arg *A :
1505        Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1506     if (A->getOption().matches(OPT_iprefix))
1507       Prefix = A->getValue();
1508     else if (A->getOption().matches(OPT_iwithprefix))
1509       Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1510     else
1511       Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1512   }
1513 
1514   for (const Arg *A : Args.filtered(OPT_idirafter))
1515     Opts.AddPath(A->getValue(), frontend::After, false, true);
1516   for (const Arg *A : Args.filtered(OPT_iquote))
1517     Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1518   for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1519     Opts.AddPath(A->getValue(), frontend::System, false,
1520                  !A->getOption().matches(OPT_iwithsysroot));
1521   for (const Arg *A : Args.filtered(OPT_iframework))
1522     Opts.AddPath(A->getValue(), frontend::System, true, true);
1523   for (const Arg *A : Args.filtered(OPT_iframeworkwithsysroot))
1524     Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
1525                  /*IgnoreSysRoot=*/false);
1526 
1527   // Add the paths for the various language specific isystem flags.
1528   for (const Arg *A : Args.filtered(OPT_c_isystem))
1529     Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1530   for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1531     Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1532   for (const Arg *A : Args.filtered(OPT_objc_isystem))
1533     Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1534   for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1535     Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1536 
1537   // Add the internal paths from a driver that detects standard include paths.
1538   for (const Arg *A :
1539        Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1540     frontend::IncludeDirGroup Group = frontend::System;
1541     if (A->getOption().matches(OPT_internal_externc_isystem))
1542       Group = frontend::ExternCSystem;
1543     Opts.AddPath(A->getValue(), Group, false, true);
1544   }
1545 
1546   // Add the path prefixes which are implicitly treated as being system headers.
1547   for (const Arg *A :
1548        Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1549     Opts.AddSystemHeaderPrefix(
1550         A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1551 
1552   for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1553     Opts.AddVFSOverlayFile(A->getValue());
1554 }
1555 
1556 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1557                                          const llvm::Triple &T,
1558                                          PreprocessorOptions &PPOpts,
1559                                          LangStandard::Kind LangStd) {
1560   // Set some properties which depend solely on the input kind; it would be nice
1561   // to move these to the language standard, and have the driver resolve the
1562   // input kind + language standard.
1563   if (IK == IK_Asm) {
1564     Opts.AsmPreprocessor = 1;
1565   } else if (IK == IK_ObjC ||
1566              IK == IK_ObjCXX ||
1567              IK == IK_PreprocessedObjC ||
1568              IK == IK_PreprocessedObjCXX) {
1569     Opts.ObjC1 = Opts.ObjC2 = 1;
1570   }
1571 
1572   if (LangStd == LangStandard::lang_unspecified) {
1573     // Based on the base language, pick one.
1574     switch (IK) {
1575     case IK_None:
1576     case IK_AST:
1577     case IK_LLVM_IR:
1578       llvm_unreachable("Invalid input kind!");
1579     case IK_OpenCL:
1580       LangStd = LangStandard::lang_opencl;
1581       break;
1582     case IK_CUDA:
1583     case IK_PreprocessedCuda:
1584       LangStd = LangStandard::lang_cuda;
1585       break;
1586     case IK_Asm:
1587     case IK_C:
1588     case IK_PreprocessedC:
1589       // The PS4 uses C99 as the default C standard.
1590       if (T.isPS4())
1591         LangStd = LangStandard::lang_gnu99;
1592       else
1593         LangStd = LangStandard::lang_gnu11;
1594       break;
1595     case IK_ObjC:
1596     case IK_PreprocessedObjC:
1597       LangStd = LangStandard::lang_gnu11;
1598       break;
1599     case IK_CXX:
1600     case IK_PreprocessedCXX:
1601     case IK_ObjCXX:
1602     case IK_PreprocessedObjCXX:
1603       // The PS4 uses C++11 as the default C++ standard.
1604       if (T.isPS4())
1605         LangStd = LangStandard::lang_gnucxx11;
1606       else
1607         LangStd = LangStandard::lang_gnucxx98;
1608       break;
1609     case IK_RenderScript:
1610       LangStd = LangStandard::lang_c99;
1611       break;
1612     }
1613   }
1614 
1615   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1616   Opts.LineComment = Std.hasLineComments();
1617   Opts.C99 = Std.isC99();
1618   Opts.C11 = Std.isC11();
1619   Opts.CPlusPlus = Std.isCPlusPlus();
1620   Opts.CPlusPlus11 = Std.isCPlusPlus11();
1621   Opts.CPlusPlus14 = Std.isCPlusPlus14();
1622   Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1623   Opts.Digraphs = Std.hasDigraphs();
1624   Opts.GNUMode = Std.isGNUMode();
1625   Opts.GNUInline = Std.isC89();
1626   Opts.HexFloats = Std.hasHexFloats();
1627   Opts.ImplicitInt = Std.hasImplicitInt();
1628 
1629   // Set OpenCL Version.
1630   Opts.OpenCL = Std.isOpenCL() || IK == IK_OpenCL;
1631   if (LangStd == LangStandard::lang_opencl)
1632     Opts.OpenCLVersion = 100;
1633   else if (LangStd == LangStandard::lang_opencl11)
1634     Opts.OpenCLVersion = 110;
1635   else if (LangStd == LangStandard::lang_opencl12)
1636     Opts.OpenCLVersion = 120;
1637   else if (LangStd == LangStandard::lang_opencl20)
1638     Opts.OpenCLVersion = 200;
1639 
1640   // OpenCL has some additional defaults.
1641   if (Opts.OpenCL) {
1642     Opts.AltiVec = 0;
1643     Opts.ZVector = 0;
1644     Opts.CXXOperatorNames = 1;
1645     Opts.LaxVectorConversions = 0;
1646     Opts.DefaultFPContract = 1;
1647     Opts.NativeHalfType = 1;
1648     Opts.NativeHalfArgsAndReturns = 1;
1649     // Include default header file for OpenCL.
1650     if (Opts.IncludeDefaultHeader) {
1651       PPOpts.Includes.push_back("opencl-c.h");
1652     }
1653   }
1654 
1655   Opts.CUDA = IK == IK_CUDA || IK == IK_PreprocessedCuda ||
1656               LangStd == LangStandard::lang_cuda;
1657 
1658   Opts.RenderScript = IK == IK_RenderScript;
1659   if (Opts.RenderScript) {
1660     Opts.NativeHalfType = 1;
1661     Opts.NativeHalfArgsAndReturns = 1;
1662   }
1663 
1664   // OpenCL and C++ both have bool, true, false keywords.
1665   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1666 
1667   // OpenCL has half keyword
1668   Opts.Half = Opts.OpenCL;
1669 
1670   // C++ has wchar_t keyword.
1671   Opts.WChar = Opts.CPlusPlus;
1672 
1673   Opts.GNUKeywords = Opts.GNUMode;
1674   Opts.CXXOperatorNames = Opts.CPlusPlus;
1675 
1676   Opts.AlignedAllocation = Opts.CPlusPlus1z;
1677 
1678   Opts.DollarIdents = !Opts.AsmPreprocessor;
1679 }
1680 
1681 /// Attempt to parse a visibility value out of the given argument.
1682 static Visibility parseVisibility(Arg *arg, ArgList &args,
1683                                   DiagnosticsEngine &diags) {
1684   StringRef value = arg->getValue();
1685   if (value == "default") {
1686     return DefaultVisibility;
1687   } else if (value == "hidden" || value == "internal") {
1688     return HiddenVisibility;
1689   } else if (value == "protected") {
1690     // FIXME: diagnose if target does not support protected visibility
1691     return ProtectedVisibility;
1692   }
1693 
1694   diags.Report(diag::err_drv_invalid_value)
1695     << arg->getAsString(args) << value;
1696   return DefaultVisibility;
1697 }
1698 
1699 /// Check if input file kind and language standard are compatible.
1700 static bool IsInputCompatibleWithStandard(InputKind IK,
1701                                           const LangStandard &S) {
1702   switch (IK) {
1703   case IK_C:
1704   case IK_ObjC:
1705   case IK_PreprocessedC:
1706   case IK_PreprocessedObjC:
1707     if (S.isC89() || S.isC99())
1708       return true;
1709     break;
1710   case IK_CXX:
1711   case IK_ObjCXX:
1712   case IK_PreprocessedCXX:
1713   case IK_PreprocessedObjCXX:
1714     if (S.isCPlusPlus())
1715       return true;
1716     break;
1717   case IK_OpenCL:
1718     if (S.isOpenCL())
1719       return true;
1720     break;
1721   case IK_CUDA:
1722   case IK_PreprocessedCuda:
1723     if (S.isCPlusPlus())
1724       return true;
1725     break;
1726   default:
1727     // For other inputs, accept (and ignore) all -std= values.
1728     return true;
1729   }
1730   return false;
1731 }
1732 
1733 /// Get language name for given input kind.
1734 static const StringRef GetInputKindName(InputKind IK) {
1735   switch (IK) {
1736   case IK_C:
1737   case IK_ObjC:
1738   case IK_PreprocessedC:
1739   case IK_PreprocessedObjC:
1740     return "C/ObjC";
1741   case IK_CXX:
1742   case IK_ObjCXX:
1743   case IK_PreprocessedCXX:
1744   case IK_PreprocessedObjCXX:
1745     return "C++/ObjC++";
1746   case IK_OpenCL:
1747     return "OpenCL";
1748   case IK_CUDA:
1749   case IK_PreprocessedCuda:
1750     return "CUDA";
1751   default:
1752     llvm_unreachable("Cannot decide on name for InputKind!");
1753   }
1754 }
1755 
1756 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1757                           const TargetOptions &TargetOpts,
1758                           PreprocessorOptions &PPOpts,
1759                           DiagnosticsEngine &Diags) {
1760   // FIXME: Cleanup per-file based stuff.
1761   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1762   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1763     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1764 #define LANGSTANDARD(id, name, desc, features) \
1765       .Case(name, LangStandard::lang_##id)
1766 #define LANGSTANDARD_ALIAS(id, alias) \
1767       .Case(alias, LangStandard::lang_##id)
1768 #include "clang/Frontend/LangStandards.def"
1769       .Default(LangStandard::lang_unspecified);
1770     if (LangStd == LangStandard::lang_unspecified) {
1771       Diags.Report(diag::err_drv_invalid_value)
1772         << A->getAsString(Args) << A->getValue();
1773       // Report supported standards with short description.
1774       for (unsigned KindValue = 0;
1775            KindValue != LangStandard::lang_unspecified;
1776            ++KindValue) {
1777         const LangStandard &Std = LangStandard::getLangStandardForKind(
1778           static_cast<LangStandard::Kind>(KindValue));
1779         if (IsInputCompatibleWithStandard(IK, Std)) {
1780           Diags.Report(diag::note_drv_use_standard)
1781             << Std.getName() << Std.getDescription();
1782         }
1783       }
1784     } else {
1785       // Valid standard, check to make sure language and standard are
1786       // compatible.
1787       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1788       if (!IsInputCompatibleWithStandard(IK, Std)) {
1789         Diags.Report(diag::err_drv_argument_not_allowed_with)
1790           << A->getAsString(Args) << GetInputKindName(IK);
1791       }
1792     }
1793   }
1794 
1795   // -cl-std only applies for OpenCL language standards.
1796   // Override the -std option in this case.
1797   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1798     LangStandard::Kind OpenCLLangStd
1799       = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1800         .Cases("cl", "CL", LangStandard::lang_opencl)
1801         .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
1802         .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
1803         .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
1804         .Default(LangStandard::lang_unspecified);
1805 
1806     if (OpenCLLangStd == LangStandard::lang_unspecified) {
1807       Diags.Report(diag::err_drv_invalid_value)
1808         << A->getAsString(Args) << A->getValue();
1809     }
1810     else
1811       LangStd = OpenCLLangStd;
1812   }
1813 
1814   Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
1815 
1816   llvm::Triple T(TargetOpts.Triple);
1817   CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
1818 
1819   // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
1820   // This option should be deprecated for CL > 1.0 because
1821   // this option was added for compatibility with OpenCL 1.0.
1822   if (Args.getLastArg(OPT_cl_strict_aliasing)
1823        && Opts.OpenCLVersion > 100) {
1824     std::string VerSpec = llvm::to_string(Opts.OpenCLVersion / 100) +
1825                           std::string(".") +
1826                           llvm::to_string((Opts.OpenCLVersion % 100) / 10);
1827     Diags.Report(diag::warn_option_invalid_ocl_version)
1828       << VerSpec << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
1829   }
1830 
1831   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1832   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1833   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1834   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1835   // name, as it doesn't seem a useful distinction.
1836   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1837                                   Opts.GNUKeywords);
1838 
1839   if (Args.hasArg(OPT_fno_operator_names))
1840     Opts.CXXOperatorNames = 0;
1841 
1842   if (Args.hasArg(OPT_fcuda_is_device))
1843     Opts.CUDAIsDevice = 1;
1844 
1845   if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
1846     Opts.CUDAAllowVariadicFunctions = 1;
1847 
1848   if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
1849     Opts.CUDAHostDeviceConstexpr = 0;
1850 
1851   if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_flush_denormals_to_zero))
1852     Opts.CUDADeviceFlushDenormalsToZero = 1;
1853 
1854   if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
1855     Opts.CUDADeviceApproxTranscendentals = 1;
1856 
1857   if (Opts.ObjC1) {
1858     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1859       StringRef value = arg->getValue();
1860       if (Opts.ObjCRuntime.tryParse(value))
1861         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1862     }
1863 
1864     if (Args.hasArg(OPT_fobjc_gc_only))
1865       Opts.setGC(LangOptions::GCOnly);
1866     else if (Args.hasArg(OPT_fobjc_gc))
1867       Opts.setGC(LangOptions::HybridGC);
1868     else if (Args.hasArg(OPT_fobjc_arc)) {
1869       Opts.ObjCAutoRefCount = 1;
1870       if (!Opts.ObjCRuntime.allowsARC())
1871         Diags.Report(diag::err_arc_unsupported_on_runtime);
1872     }
1873 
1874     // ObjCWeakRuntime tracks whether the runtime supports __weak, not
1875     // whether the feature is actually enabled.  This is predominantly
1876     // determined by -fobjc-runtime, but we allow it to be overridden
1877     // from the command line for testing purposes.
1878     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1879       Opts.ObjCWeakRuntime = 1;
1880     else
1881       Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
1882 
1883     // ObjCWeak determines whether __weak is actually enabled.
1884     // Note that we allow -fno-objc-weak to disable this even in ARC mode.
1885     if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
1886       if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
1887         assert(!Opts.ObjCWeak);
1888       } else if (Opts.getGC() != LangOptions::NonGC) {
1889         Diags.Report(diag::err_objc_weak_with_gc);
1890       } else if (!Opts.ObjCWeakRuntime) {
1891         Diags.Report(diag::err_objc_weak_unsupported);
1892       } else {
1893         Opts.ObjCWeak = 1;
1894       }
1895     } else if (Opts.ObjCAutoRefCount) {
1896       Opts.ObjCWeak = Opts.ObjCWeakRuntime;
1897     }
1898 
1899     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1900       Opts.ObjCInferRelatedResultType = 0;
1901 
1902     if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1903       Opts.ObjCSubscriptingLegacyRuntime =
1904         (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1905   }
1906 
1907   if (Args.hasArg(OPT_fgnu89_inline)) {
1908     if (Opts.CPlusPlus)
1909       Diags.Report(diag::err_drv_argument_not_allowed_with)
1910         << "-fgnu89-inline" << GetInputKindName(IK);
1911     else
1912       Opts.GNUInline = 1;
1913   }
1914 
1915   if (Args.hasArg(OPT_fapple_kext)) {
1916     if (!Opts.CPlusPlus)
1917       Diags.Report(diag::warn_c_kext);
1918     else
1919       Opts.AppleKext = 1;
1920   }
1921 
1922   if (Args.hasArg(OPT_print_ivar_layout))
1923     Opts.ObjCGCBitmapPrint = 1;
1924   if (Args.hasArg(OPT_fno_constant_cfstrings))
1925     Opts.NoConstantCFStrings = 1;
1926 
1927   if (Args.hasArg(OPT_fzvector))
1928     Opts.ZVector = 1;
1929 
1930   if (Args.hasArg(OPT_pthread))
1931     Opts.POSIXThreads = 1;
1932 
1933   // The value-visibility mode defaults to "default".
1934   if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1935     Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1936   } else {
1937     Opts.setValueVisibilityMode(DefaultVisibility);
1938   }
1939 
1940   // The type-visibility mode defaults to the value-visibility mode.
1941   if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1942     Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1943   } else {
1944     Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1945   }
1946 
1947   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1948     Opts.InlineVisibilityHidden = 1;
1949 
1950   if (Args.hasArg(OPT_ftrapv)) {
1951     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1952     // Set the handler, if one is specified.
1953     Opts.OverflowHandler =
1954         Args.getLastArgValue(OPT_ftrapv_handler);
1955   }
1956   else if (Args.hasArg(OPT_fwrapv))
1957     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1958 
1959   Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1960   Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1961   Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1962   Opts.MSCompatibilityVersion = 0;
1963   if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
1964     VersionTuple VT;
1965     if (VT.tryParse(A->getValue()))
1966       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1967                                                 << A->getValue();
1968     Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
1969                                   VT.getMinor().getValueOr(0) * 100000 +
1970                                   VT.getSubminor().getValueOr(0);
1971   }
1972 
1973   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1974   // is specified, or -std is set to a conforming mode.
1975   // Trigraphs are disabled by default in c++1z onwards.
1976   Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
1977   Opts.Trigraphs =
1978       Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
1979 
1980   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1981                                    OPT_fno_dollars_in_identifiers,
1982                                    Opts.DollarIdents);
1983   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1984   Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1985   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1986   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1987   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1988                                    Opts.ConstStrings);
1989   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1990     Opts.LaxVectorConversions = 0;
1991   if (Args.hasArg(OPT_fno_threadsafe_statics))
1992     Opts.ThreadsafeStatics = 0;
1993   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1994   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1995   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1996   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1997   Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
1998   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1999 
2000   Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
2001   Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
2002   Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
2003     && Opts.OpenCLVersion >= 200);
2004   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2005   Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
2006   Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
2007   Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
2008   Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
2009   Opts.ModulesDeclUse =
2010       Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
2011   Opts.ModulesLocalVisibility =
2012       Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
2013   Opts.ModularCodegen = Args.hasArg(OPT_fmodule_codegen);
2014   Opts.ModulesSearchAll = Opts.Modules &&
2015     !Args.hasArg(OPT_fno_modules_search_all) &&
2016     Args.hasArg(OPT_fmodules_search_all);
2017   Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
2018   Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
2019   Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
2020   Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2021   Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
2022   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2023   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2024   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2025   if (!Opts.NoBuiltin)
2026     getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
2027   Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
2028   Opts.RelaxedTemplateTemplateArgs =
2029       Args.hasArg(OPT_frelaxed_template_template_args);
2030   Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
2031   Opts.AlignedAllocation =
2032       Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
2033                    Opts.AlignedAllocation);
2034   Opts.NewAlignOverride =
2035       getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
2036   if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
2037     Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
2038     Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
2039                                                  << A->getValue();
2040     Opts.NewAlignOverride = 0;
2041   }
2042   Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
2043   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2044   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2045   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2046   Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
2047   Opts.InstantiationDepth =
2048       getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
2049   Opts.ArrowDepth =
2050       getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
2051   Opts.ConstexprCallDepth =
2052       getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
2053   Opts.ConstexprStepLimit =
2054       getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
2055   Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
2056   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2057   Opts.NumLargeByValueCopy =
2058       getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
2059   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2060   Opts.ObjCConstantStringClass =
2061     Args.getLastArgValue(OPT_fconstant_string_class);
2062   Opts.ObjCDefaultSynthProperties =
2063     !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
2064   Opts.EncodeExtendedBlockSig =
2065     Args.hasArg(OPT_fencode_extended_block_signature);
2066   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2067   Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
2068   Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
2069   Opts.AlignDouble = Args.hasArg(OPT_malign_double);
2070   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2071   Opts.PIE = Args.hasArg(OPT_pic_is_pie);
2072   Opts.Static = Args.hasArg(OPT_static_define);
2073   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2074   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2075                         || Args.hasArg(OPT_fdump_record_layouts);
2076   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2077   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2078   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2079   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2080   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2081   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2082   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2083   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2084   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2085   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2086   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2087   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2088   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name_EQ);
2089   Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
2090   Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
2091   std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
2092   Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
2093   Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
2094   // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
2095   // is enabled.
2096   Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
2097                             | Opts.NativeHalfArgsAndReturns;
2098   Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
2099 
2100   // __declspec is enabled by default for the PS4 by the driver, and also
2101   // enabled for Microsoft Extensions or Borland Extensions, here.
2102   //
2103   // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
2104   // CUDA extension. However, it is required for supporting
2105   // __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
2106   // been rewritten in terms of something more generic, remove the Opts.CUDA
2107   // term here.
2108   Opts.DeclSpecKeyword =
2109       Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
2110                    (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
2111 
2112   // For now, we only support local submodule visibility in C++ (because we
2113   // heavily depend on the ODR for merging redefinitions).
2114   if (Opts.ModulesLocalVisibility && !Opts.CPlusPlus)
2115     Diags.Report(diag::err_drv_argument_not_allowed_with)
2116         << "-fmodules-local-submodule-visibility" << "C";
2117 
2118   if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
2119     switch (llvm::StringSwitch<unsigned>(A->getValue())
2120       .Case("target", LangOptions::ASMM_Target)
2121       .Case("no", LangOptions::ASMM_Off)
2122       .Case("yes", LangOptions::ASMM_On)
2123       .Default(255)) {
2124     default:
2125       Diags.Report(diag::err_drv_invalid_value)
2126         << "-faddress-space-map-mangling=" << A->getValue();
2127       break;
2128     case LangOptions::ASMM_Target:
2129       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
2130       break;
2131     case LangOptions::ASMM_On:
2132       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
2133       break;
2134     case LangOptions::ASMM_Off:
2135       Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
2136       break;
2137     }
2138   }
2139 
2140   if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
2141     LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
2142         llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
2143             A->getValue())
2144             .Case("single",
2145                   LangOptions::PPTMK_FullGeneralitySingleInheritance)
2146             .Case("multiple",
2147                   LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2148             .Case("virtual",
2149                   LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2150             .Default(LangOptions::PPTMK_BestCase);
2151     if (InheritanceModel == LangOptions::PPTMK_BestCase)
2152       Diags.Report(diag::err_drv_invalid_value)
2153           << "-fms-memptr-rep=" << A->getValue();
2154 
2155     Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2156   }
2157 
2158   // Check for MS default calling conventions being specified.
2159   if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2160     LangOptions::DefaultCallingConvention DefaultCC =
2161         llvm::StringSwitch<LangOptions::DefaultCallingConvention>(
2162             A->getValue())
2163             .Case("cdecl", LangOptions::DCC_CDecl)
2164             .Case("fastcall", LangOptions::DCC_FastCall)
2165             .Case("stdcall", LangOptions::DCC_StdCall)
2166             .Case("vectorcall", LangOptions::DCC_VectorCall)
2167             .Default(LangOptions::DCC_None);
2168     if (DefaultCC == LangOptions::DCC_None)
2169       Diags.Report(diag::err_drv_invalid_value)
2170           << "-fdefault-calling-conv=" << A->getValue();
2171 
2172     llvm::Triple T(TargetOpts.Triple);
2173     llvm::Triple::ArchType Arch = T.getArch();
2174     bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2175                   DefaultCC == LangOptions::DCC_StdCall) &&
2176                  Arch != llvm::Triple::x86;
2177     emitError |= DefaultCC == LangOptions::DCC_VectorCall &&
2178                  !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2179     if (emitError)
2180       Diags.Report(diag::err_drv_argument_not_allowed_with)
2181           << A->getSpelling() << T.getTriple();
2182     else
2183       Opts.setDefaultCallingConv(DefaultCC);
2184   }
2185 
2186   // -mrtd option
2187   if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2188     if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2189       Diags.Report(diag::err_drv_argument_not_allowed_with)
2190           << A->getSpelling() << "-fdefault-calling-conv";
2191     else {
2192       llvm::Triple T(TargetOpts.Triple);
2193       if (T.getArch() != llvm::Triple::x86)
2194         Diags.Report(diag::err_drv_argument_not_allowed_with)
2195             << A->getSpelling() << T.getTriple();
2196       else
2197         Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2198     }
2199   }
2200 
2201   // Check if -fopenmp is specified.
2202   Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2203   Opts.OpenMPUseTLS =
2204       Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2205   Opts.OpenMPIsDevice =
2206       Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2207 
2208   if (Opts.OpenMP) {
2209     int Version =
2210         getLastArgIntValue(Args, OPT_fopenmp_version_EQ, Opts.OpenMP, Diags);
2211     if (Version != 0)
2212       Opts.OpenMP = Version;
2213     // Provide diagnostic when a given target is not expected to be an OpenMP
2214     // device or host.
2215     if (!Opts.OpenMPIsDevice) {
2216       switch (T.getArch()) {
2217       default:
2218         break;
2219       // Add unsupported host targets here:
2220       case llvm::Triple::nvptx:
2221       case llvm::Triple::nvptx64:
2222         Diags.Report(clang::diag::err_drv_omp_host_target_not_supported)
2223             << TargetOpts.Triple;
2224         break;
2225       }
2226     }
2227   }
2228 
2229   // Get the OpenMP target triples if any.
2230   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2231 
2232     for (unsigned i = 0; i < A->getNumValues(); ++i) {
2233       llvm::Triple TT(A->getValue(i));
2234 
2235       if (TT.getArch() == llvm::Triple::UnknownArch)
2236         Diags.Report(clang::diag::err_drv_invalid_omp_target) << A->getValue(i);
2237       else
2238         Opts.OMPTargetTriples.push_back(TT);
2239     }
2240   }
2241 
2242   // Get OpenMP host file path if any and report if a non existent file is
2243   // found
2244   if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2245     Opts.OMPHostIRFile = A->getValue();
2246     if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2247       Diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
2248           << Opts.OMPHostIRFile;
2249   }
2250 
2251   // Record whether the __DEPRECATED define was requested.
2252   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2253                                  OPT_fno_deprecated_macro,
2254                                  Opts.Deprecated);
2255 
2256   // FIXME: Eliminate this dependency.
2257   unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2258        OptSize = getOptimizationLevelSize(Args);
2259   Opts.Optimize = Opt != 0;
2260   Opts.OptimizeSize = OptSize != 0;
2261 
2262   // This is the __NO_INLINE__ define, which just depends on things like the
2263   // optimization level and -fno-inline, not actually whether the backend has
2264   // inlining enabled.
2265   Opts.NoInlineDefine = !Opts.Optimize;
2266   if (Arg *InlineArg = Args.getLastArg(
2267           options::OPT_finline_functions, options::OPT_finline_hint_functions,
2268           options::OPT_fno_inline_functions, options::OPT_fno_inline))
2269     if (InlineArg->getOption().matches(options::OPT_fno_inline))
2270       Opts.NoInlineDefine = true;
2271 
2272   Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2273       Args.hasArg(OPT_cl_fast_relaxed_math);
2274   Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2275       Args.hasArg(OPT_cl_finite_math_only) ||
2276       Args.hasArg(OPT_cl_fast_relaxed_math);
2277   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2278                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2279                       Args.hasArg(OPT_cl_fast_relaxed_math);
2280 
2281   Opts.RetainCommentsFromSystemHeaders =
2282       Args.hasArg(OPT_fretain_comments_from_system_headers);
2283 
2284   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2285   switch (SSP) {
2286   default:
2287     Diags.Report(diag::err_drv_invalid_value)
2288       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2289     break;
2290   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2291   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2292   case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2293   case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2294   }
2295 
2296   // Parse -fsanitize= arguments.
2297   parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2298                       Diags, Opts.Sanitize);
2299   // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2300   Opts.SanitizeAddressFieldPadding =
2301       getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2302   Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2303 }
2304 
2305 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2306                                   FileManager &FileMgr,
2307                                   DiagnosticsEngine &Diags) {
2308   using namespace options;
2309   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2310   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2311   if (const Arg *A = Args.getLastArg(OPT_token_cache))
2312       Opts.TokenCache = A->getValue();
2313   else
2314     Opts.TokenCache = Opts.ImplicitPTHInclude;
2315   Opts.UsePredefines = !Args.hasArg(OPT_undef);
2316   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2317   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2318   Opts.AllowPCHWithCompilerErrors = Args.hasArg(OPT_fallow_pch_with_errors);
2319 
2320   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2321   for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
2322     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
2323 
2324   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2325     StringRef Value(A->getValue());
2326     size_t Comma = Value.find(',');
2327     unsigned Bytes = 0;
2328     unsigned EndOfLine = 0;
2329 
2330     if (Comma == StringRef::npos ||
2331         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2332         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2333       Diags.Report(diag::err_drv_preamble_format);
2334     else {
2335       Opts.PrecompiledPreambleBytes.first = Bytes;
2336       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2337     }
2338   }
2339 
2340   // Add macros from the command line.
2341   for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
2342     if (A->getOption().matches(OPT_D))
2343       Opts.addMacroDef(A->getValue());
2344     else
2345       Opts.addMacroUndef(A->getValue());
2346   }
2347 
2348   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2349 
2350   // Add the ordered list of -includes.
2351   for (const Arg *A : Args.filtered(OPT_include))
2352     Opts.Includes.emplace_back(A->getValue());
2353 
2354   for (const Arg *A : Args.filtered(OPT_chain_include))
2355     Opts.ChainedIncludes.emplace_back(A->getValue());
2356 
2357   for (const Arg *A : Args.filtered(OPT_remap_file)) {
2358     std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
2359 
2360     if (Split.second.empty()) {
2361       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2362       continue;
2363     }
2364 
2365     Opts.addRemappedFile(Split.first, Split.second);
2366   }
2367 
2368   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2369     StringRef Name = A->getValue();
2370     unsigned Library = llvm::StringSwitch<unsigned>(Name)
2371       .Case("libc++", ARCXX_libcxx)
2372       .Case("libstdc++", ARCXX_libstdcxx)
2373       .Case("none", ARCXX_nolib)
2374       .Default(~0U);
2375     if (Library == ~0U)
2376       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2377     else
2378       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2379   }
2380 }
2381 
2382 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2383                                         ArgList &Args,
2384                                         frontend::ActionKind Action) {
2385   using namespace options;
2386 
2387   switch (Action) {
2388   case frontend::ASTDeclList:
2389   case frontend::ASTDump:
2390   case frontend::ASTPrint:
2391   case frontend::ASTView:
2392   case frontend::EmitAssembly:
2393   case frontend::EmitBC:
2394   case frontend::EmitHTML:
2395   case frontend::EmitLLVM:
2396   case frontend::EmitLLVMOnly:
2397   case frontend::EmitCodeGenOnly:
2398   case frontend::EmitObj:
2399   case frontend::FixIt:
2400   case frontend::GenerateModule:
2401   case frontend::GenerateModuleInterface:
2402   case frontend::GeneratePCH:
2403   case frontend::GeneratePTH:
2404   case frontend::ParseSyntaxOnly:
2405   case frontend::ModuleFileInfo:
2406   case frontend::VerifyPCH:
2407   case frontend::PluginAction:
2408   case frontend::PrintDeclContext:
2409   case frontend::RewriteObjC:
2410   case frontend::RewriteTest:
2411   case frontend::RunAnalysis:
2412   case frontend::MigrateSource:
2413     Opts.ShowCPP = 0;
2414     break;
2415 
2416   case frontend::DumpRawTokens:
2417   case frontend::DumpTokens:
2418   case frontend::InitOnly:
2419   case frontend::PrintPreamble:
2420   case frontend::PrintPreprocessedInput:
2421   case frontend::RewriteMacros:
2422   case frontend::RunPreprocessorOnly:
2423     Opts.ShowCPP = !Args.hasArg(OPT_dM);
2424     break;
2425   }
2426 
2427   Opts.ShowComments = Args.hasArg(OPT_C);
2428   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2429   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2430   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2431   Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
2432   Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2433   Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
2434 }
2435 
2436 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
2437                             DiagnosticsEngine &Diags) {
2438   using namespace options;
2439   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2440   if (Arg *A = Args.getLastArg(OPT_meabi)) {
2441     StringRef Value = A->getValue();
2442     llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
2443                                  .Case("default", llvm::EABI::Default)
2444                                  .Case("4", llvm::EABI::EABI4)
2445                                  .Case("5", llvm::EABI::EABI5)
2446                                  .Case("gnu", llvm::EABI::GNU)
2447                                  .Default(llvm::EABI::Unknown);
2448     if (EABIVersion == llvm::EABI::Unknown)
2449       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2450                                                 << Value;
2451     else
2452       Opts.EABIVersion = Value;
2453   }
2454   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2455   Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
2456   Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2457   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2458   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2459   Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
2460   // Use the default target triple if unspecified.
2461   if (Opts.Triple.empty())
2462     Opts.Triple = llvm::sys::getDefaultTargetTriple();
2463   Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
2464 }
2465 
2466 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2467                                         const char *const *ArgBegin,
2468                                         const char *const *ArgEnd,
2469                                         DiagnosticsEngine &Diags) {
2470   bool Success = true;
2471 
2472   // Parse the arguments.
2473   std::unique_ptr<OptTable> Opts = createDriverOptTable();
2474   const unsigned IncludedFlagsBitmask = options::CC1Option;
2475   unsigned MissingArgIndex, MissingArgCount;
2476   InputArgList Args =
2477       Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
2478                       MissingArgCount, IncludedFlagsBitmask);
2479   LangOptions &LangOpts = *Res.getLangOpts();
2480 
2481   // Check for missing argument error.
2482   if (MissingArgCount) {
2483     Diags.Report(diag::err_drv_missing_argument)
2484         << Args.getArgString(MissingArgIndex) << MissingArgCount;
2485     Success = false;
2486   }
2487 
2488   // Issue errors on unknown arguments.
2489   for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
2490     Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
2491     Success = false;
2492   }
2493 
2494   Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
2495   Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
2496   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
2497   Success &=
2498       ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
2499                           false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
2500   ParseCommentArgs(LangOpts.CommentOpts, Args);
2501   ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
2502   // FIXME: We shouldn't have to pass the DashX option around here
2503   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
2504                                       LangOpts.IsHeaderFile);
2505   ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
2506   Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
2507                               Res.getTargetOpts());
2508   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
2509                         Res.getFileSystemOpts().WorkingDir);
2510   if (DashX == IK_AST || DashX == IK_LLVM_IR) {
2511     // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
2512     // PassManager in BackendUtil.cpp. They need to be initializd no matter
2513     // what the input type is.
2514     if (Args.hasArg(OPT_fobjc_arc))
2515       LangOpts.ObjCAutoRefCount = 1;
2516     // PIClevel and PIELevel are needed during code generation and this should be
2517     // set regardless of the input type.
2518     LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2519     LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
2520     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2521                         Diags, LangOpts.Sanitize);
2522   } else {
2523     // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
2524     ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
2525       Res.getPreprocessorOpts(), Diags);
2526     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2527       LangOpts.ObjCExceptions = 1;
2528   }
2529 
2530   if (LangOpts.CUDA) {
2531     // During CUDA device-side compilation, the aux triple is the
2532     // triple used for host compilation.
2533     if (LangOpts.CUDAIsDevice)
2534       Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2535 
2536     // Set default FP_CONTRACT to FAST.
2537     if (!Args.hasArg(OPT_ffp_contract))
2538       Res.getCodeGenOpts().setFPContractMode(CodeGenOptions::FPC_Fast);
2539   }
2540 
2541   // FIXME: Override value name discarding when asan or msan is used because the
2542   // backend passes depend on the name of the alloca in order to print out
2543   // names.
2544   Res.getCodeGenOpts().DiscardValueNames &=
2545       !LangOpts.Sanitize.has(SanitizerKind::Address) &&
2546       !LangOpts.Sanitize.has(SanitizerKind::Memory);
2547 
2548   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2549   // PCH file and find the original header name. Remove the need to do that in
2550   // ParsePreprocessorArgs and remove the FileManager
2551   // parameters from the function and the "FileManager.h" #include.
2552   FileManager FileMgr(Res.getFileSystemOpts());
2553   ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags);
2554   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
2555                               Res.getFrontendOpts().ProgramAction);
2556 
2557   // Turn on -Wspir-compat for SPIR target.
2558   llvm::Triple T(Res.getTargetOpts().Triple);
2559   auto Arch = T.getArch();
2560   if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
2561     Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
2562   }
2563   return Success;
2564 }
2565 
2566 std::string CompilerInvocation::getModuleHash() const {
2567   // Note: For QoI reasons, the things we use as a hash here should all be
2568   // dumped via the -module-info flag.
2569   using llvm::hash_code;
2570   using llvm::hash_value;
2571   using llvm::hash_combine;
2572 
2573   // Start the signature with the compiler version.
2574   // FIXME: We'd rather use something more cryptographically sound than
2575   // CityHash, but this will do for now.
2576   hash_code code = hash_value(getClangFullRepositoryVersion());
2577 
2578   // Extend the signature with the language options
2579 #define LANGOPT(Name, Bits, Default, Description) \
2580    code = hash_combine(code, LangOpts->Name);
2581 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2582   code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
2583 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2584 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2585 #include "clang/Basic/LangOptions.def"
2586 
2587   for (StringRef Feature : LangOpts->ModuleFeatures)
2588     code = hash_combine(code, Feature);
2589 
2590   // Extend the signature with the target options.
2591   code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
2592                       TargetOpts->ABI);
2593   for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
2594     code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
2595 
2596   // Extend the signature with preprocessor options.
2597   const PreprocessorOptions &ppOpts = getPreprocessorOpts();
2598   const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
2599   code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
2600 
2601   for (std::vector<std::pair<std::string, bool/*isUndef*/>>::const_iterator
2602             I = getPreprocessorOpts().Macros.begin(),
2603          IEnd = getPreprocessorOpts().Macros.end();
2604        I != IEnd; ++I) {
2605     // If we're supposed to ignore this macro for the purposes of modules,
2606     // don't put it into the hash.
2607     if (!hsOpts.ModulesIgnoreMacros.empty()) {
2608       // Check whether we're ignoring this macro.
2609       StringRef MacroDef = I->first;
2610       if (hsOpts.ModulesIgnoreMacros.count(
2611               llvm::CachedHashString(MacroDef.split('=').first)))
2612         continue;
2613     }
2614 
2615     code = hash_combine(code, I->first, I->second);
2616   }
2617 
2618   // Extend the signature with the sysroot and other header search options.
2619   code = hash_combine(code, hsOpts.Sysroot,
2620                       hsOpts.ModuleFormat,
2621                       hsOpts.UseDebugInfo,
2622                       hsOpts.UseBuiltinIncludes,
2623                       hsOpts.UseStandardSystemIncludes,
2624                       hsOpts.UseStandardCXXIncludes,
2625                       hsOpts.UseLibcxx,
2626                       hsOpts.ModulesValidateDiagnosticOptions);
2627   code = hash_combine(code, hsOpts.ResourceDir);
2628 
2629   // Extend the signature with the user build path.
2630   code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2631 
2632   // Extend the signature with the module file extensions.
2633   const FrontendOptions &frontendOpts = getFrontendOpts();
2634   for (const auto &ext : frontendOpts.ModuleFileExtensions) {
2635     code = ext->hashExtension(code);
2636   }
2637 
2638   // Darwin-specific hack: if we have a sysroot, use the contents and
2639   // modification time of
2640   //   $sysroot/System/Library/CoreServices/SystemVersion.plist
2641   // as part of the module hash.
2642   if (!hsOpts.Sysroot.empty()) {
2643     SmallString<128> systemVersionFile;
2644     systemVersionFile += hsOpts.Sysroot;
2645     llvm::sys::path::append(systemVersionFile, "System");
2646     llvm::sys::path::append(systemVersionFile, "Library");
2647     llvm::sys::path::append(systemVersionFile, "CoreServices");
2648     llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
2649 
2650     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
2651         llvm::MemoryBuffer::getFile(systemVersionFile);
2652     if (buffer) {
2653       code = hash_combine(code, buffer.get()->getBuffer());
2654 
2655       struct stat statBuf;
2656       if (stat(systemVersionFile.c_str(), &statBuf) == 0)
2657         code = hash_combine(code, statBuf.st_mtime);
2658     }
2659   }
2660 
2661   return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2662 }
2663 
2664 namespace clang {
2665 
2666 template<typename IntTy>
2667 static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2668                                     IntTy Default,
2669                                     DiagnosticsEngine *Diags) {
2670   IntTy Res = Default;
2671   if (Arg *A = Args.getLastArg(Id)) {
2672     if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2673       if (Diags)
2674         Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2675                                                        << A->getValue();
2676     }
2677   }
2678   return Res;
2679 }
2680 
2681 
2682 // Declared in clang/Frontend/Utils.h.
2683 int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2684                        DiagnosticsEngine *Diags) {
2685   return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2686 }
2687 
2688 uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2689                                uint64_t Default,
2690                                DiagnosticsEngine *Diags) {
2691   return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2692 }
2693 
2694 void BuryPointer(const void *Ptr) {
2695   // This function may be called only a small fixed amount of times per each
2696   // invocation, otherwise we do actually have a leak which we want to report.
2697   // If this function is called more than kGraveYardMaxSize times, the pointers
2698   // will not be properly buried and a leak detector will report a leak, which
2699   // is what we want in such case.
2700   static const size_t kGraveYardMaxSize = 16;
2701   LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2702   static std::atomic<unsigned> GraveYardSize;
2703   unsigned Idx = GraveYardSize++;
2704   if (Idx >= kGraveYardMaxSize)
2705     return;
2706   GraveYard[Idx] = Ptr;
2707 }
2708 
2709 IntrusiveRefCntPtr<vfs::FileSystem>
2710 createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2711                                 DiagnosticsEngine &Diags) {
2712   if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2713     return vfs::getRealFileSystem();
2714 
2715   IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2716     Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2717   // earlier vfs files are on the bottom
2718   for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2719     llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2720         llvm::MemoryBuffer::getFile(File);
2721     if (!Buffer) {
2722       Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2723       return IntrusiveRefCntPtr<vfs::FileSystem>();
2724     }
2725 
2726     IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getVFSFromYAML(
2727         std::move(Buffer.get()), /*DiagHandler*/ nullptr, File);
2728     if (!FS.get()) {
2729       Diags.Report(diag::err_invalid_vfs_overlay) << File;
2730       return IntrusiveRefCntPtr<vfs::FileSystem>();
2731     }
2732     Overlay->pushOverlay(FS);
2733   }
2734   return Overlay;
2735 }
2736 } // end namespace clang
2737