CompilerInvocation.cpp revision 323112 
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>
50using namespace clang;
51
52//===----------------------------------------------------------------------===//
53// Initialization.
54//===----------------------------------------------------------------------===//
55
56CompilerInvocationBase::CompilerInvocationBase()
57  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
58    DiagnosticOpts(new DiagnosticOptions()),
59    HeaderSearchOpts(new HeaderSearchOptions()),
60    PreprocessorOpts(new PreprocessorOptions()) {}
61
62CompilerInvocationBase::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
69CompilerInvocationBase::~CompilerInvocationBase() {}
70
71//===----------------------------------------------------------------------===//
72// Deserialization (from args)
73//===----------------------------------------------------------------------===//
74
75using namespace clang::driver;
76using namespace clang::driver::options;
77using namespace llvm::opt;
78
79//
80
81static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
82                                     DiagnosticsEngine &Diags) {
83  unsigned DefaultOpt = 0;
84  if (IK.getLanguage() == InputKind::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
109static 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
125static 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
144static 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
158static 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
311static 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
317static 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
322static 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
333static StringRef getRelocModel(ArgList &Args, DiagnosticsEngine &Diags) {
334  if (Arg *A = Args.getLastArg(OPT_mrelocation_model)) {
335    StringRef Value = A->getValue();
336    if (Value == "static" || Value == "pic" || Value == "ropi" ||
337        Value == "rwpi" || Value == "ropi-rwpi" || Value == "dynamic-no-pic")
338      return Value;
339    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
340  }
341  return "pic";
342}
343
344/// \brief Create a new Regex instance out of the string value in \p RpassArg.
345/// It returns a pointer to the newly generated Regex instance.
346static std::shared_ptr<llvm::Regex>
347GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
348                                Arg *RpassArg) {
349  StringRef Val = RpassArg->getValue();
350  std::string RegexError;
351  std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
352  if (!Pattern->isValid(RegexError)) {
353    Diags.Report(diag::err_drv_optimization_remark_pattern)
354        << RegexError << RpassArg->getAsString(Args);
355    Pattern.reset();
356  }
357  return Pattern;
358}
359
360static bool parseDiagnosticLevelMask(StringRef FlagName,
361                                     const std::vector<std::string> &Levels,
362                                     DiagnosticsEngine *Diags,
363                                     DiagnosticLevelMask &M) {
364  bool Success = true;
365  for (const auto &Level : Levels) {
366    DiagnosticLevelMask const PM =
367      llvm::StringSwitch<DiagnosticLevelMask>(Level)
368        .Case("note",    DiagnosticLevelMask::Note)
369        .Case("remark",  DiagnosticLevelMask::Remark)
370        .Case("warning", DiagnosticLevelMask::Warning)
371        .Case("error",   DiagnosticLevelMask::Error)
372        .Default(DiagnosticLevelMask::None);
373    if (PM == DiagnosticLevelMask::None) {
374      Success = false;
375      if (Diags)
376        Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
377    }
378    M = M | PM;
379  }
380  return Success;
381}
382
383static void parseSanitizerKinds(StringRef FlagName,
384                                const std::vector<std::string> &Sanitizers,
385                                DiagnosticsEngine &Diags, SanitizerSet &S) {
386  for (const auto &Sanitizer : Sanitizers) {
387    SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
388    if (K == 0)
389      Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
390    else
391      S.set(K, true);
392  }
393}
394
395// Set the profile kind for fprofile-instrument.
396static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
397                               DiagnosticsEngine &Diags) {
398  Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
399  if (A == nullptr)
400    return;
401  StringRef S = A->getValue();
402  unsigned I = llvm::StringSwitch<unsigned>(S)
403                   .Case("none", CodeGenOptions::ProfileNone)
404                   .Case("clang", CodeGenOptions::ProfileClangInstr)
405                   .Case("llvm", CodeGenOptions::ProfileIRInstr)
406                   .Default(~0U);
407  if (I == ~0U) {
408    Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
409                                                         << S;
410    return;
411  }
412  CodeGenOptions::ProfileInstrKind Instrumentor =
413      static_cast<CodeGenOptions::ProfileInstrKind>(I);
414  Opts.setProfileInstr(Instrumentor);
415}
416
417// Set the profile kind using fprofile-instrument-use-path.
418static void setPGOUseInstrumentor(CodeGenOptions &Opts,
419                                  const Twine &ProfileName) {
420  auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
421  // In error, return silently and let Clang PGOUse report the error message.
422  if (auto E = ReaderOrErr.takeError()) {
423    llvm::consumeError(std::move(E));
424    Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
425    return;
426  }
427  std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
428    std::move(ReaderOrErr.get());
429  if (PGOReader->isIRLevelProfile())
430    Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
431  else
432    Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
433}
434
435static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
436                             DiagnosticsEngine &Diags,
437                             const TargetOptions &TargetOpts) {
438  using namespace options;
439  bool Success = true;
440  llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
441
442  unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
443  // TODO: This could be done in Driver
444  unsigned MaxOptLevel = 3;
445  if (OptimizationLevel > MaxOptLevel) {
446    // If the optimization level is not supported, fall back on the default
447    // optimization
448    Diags.Report(diag::warn_drv_optimization_value)
449        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
450    OptimizationLevel = MaxOptLevel;
451  }
452  Opts.OptimizationLevel = OptimizationLevel;
453
454  // At O0 we want to fully disable inlining outside of cases marked with
455  // 'alwaysinline' that are required for correctness.
456  Opts.setInlining((Opts.OptimizationLevel == 0)
457                       ? CodeGenOptions::OnlyAlwaysInlining
458                       : CodeGenOptions::NormalInlining);
459  // Explicit inlining flags can disable some or all inlining even at
460  // optimization levels above zero.
461  if (Arg *InlineArg = Args.getLastArg(
462          options::OPT_finline_functions, options::OPT_finline_hint_functions,
463          options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
464    if (Opts.OptimizationLevel > 0) {
465      const Option &InlineOpt = InlineArg->getOption();
466      if (InlineOpt.matches(options::OPT_finline_functions))
467        Opts.setInlining(CodeGenOptions::NormalInlining);
468      else if (InlineOpt.matches(options::OPT_finline_hint_functions))
469        Opts.setInlining(CodeGenOptions::OnlyHintInlining);
470      else
471        Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
472    }
473  }
474
475  Opts.ExperimentalNewPassManager = Args.hasFlag(
476      OPT_fexperimental_new_pass_manager, OPT_fno_experimental_new_pass_manager,
477      /* Default */ false);
478
479  Opts.DebugPassManager =
480      Args.hasFlag(OPT_fdebug_pass_manager, OPT_fno_debug_pass_manager,
481                   /* Default */ false);
482
483  if (Arg *A = Args.getLastArg(OPT_fveclib)) {
484    StringRef Name = A->getValue();
485    if (Name == "Accelerate")
486      Opts.setVecLib(CodeGenOptions::Accelerate);
487    else if (Name == "SVML")
488      Opts.setVecLib(CodeGenOptions::SVML);
489    else if (Name == "none")
490      Opts.setVecLib(CodeGenOptions::NoLibrary);
491    else
492      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
493  }
494
495  if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
496    unsigned Val =
497        llvm::StringSwitch<unsigned>(A->getValue())
498            .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
499            .Case("limited", codegenoptions::LimitedDebugInfo)
500            .Case("standalone", codegenoptions::FullDebugInfo)
501            .Default(~0U);
502    if (Val == ~0U)
503      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
504                                                << A->getValue();
505    else
506      Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
507  }
508  if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
509    unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
510                       .Case("gdb", unsigned(llvm::DebuggerKind::GDB))
511                       .Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
512                       .Case("sce", unsigned(llvm::DebuggerKind::SCE))
513                       .Default(~0U);
514    if (Val == ~0U)
515      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
516                                                << A->getValue();
517    else
518      Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
519  }
520  Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
521  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
522  Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
523  Opts.MacroDebugInfo = Args.hasArg(OPT_debug_info_macro);
524  Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
525  Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
526  Opts.EnableSplitDwarf = Args.hasArg(OPT_enable_split_dwarf);
527  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
528  Opts.SplitDwarfInlining = !Args.hasArg(OPT_fno_split_dwarf_inlining);
529  Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
530  Opts.DebugExplicitImport = Triple.isPS4CPU();
531
532  for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
533    Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
534
535  if (const Arg *A =
536          Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
537    Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
538
539  Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
540  Opts.DisableLifetimeMarkers = Args.hasArg(OPT_disable_lifetimemarkers);
541  Opts.DisableO0ImplyOptNone = Args.hasArg(OPT_disable_O0_optnone);
542  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
543  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
544  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
545    OPT_fuse_register_sized_bitfield_access);
546  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
547  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
548  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
549  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
550  Opts.NoCommon = Args.hasArg(OPT_fno_common);
551  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
552  Opts.OptimizeSize = getOptimizationLevelSize(Args);
553  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
554                            Args.hasArg(OPT_ffreestanding));
555  if (Opts.SimplifyLibCalls)
556    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
557  Opts.UnrollLoops =
558      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
559                   (Opts.OptimizationLevel > 1));
560  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
561
562  Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
563  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
564  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
565  Opts.DebugInfoForProfiling = Args.hasFlag(
566      OPT_fdebug_info_for_profiling, OPT_fno_debug_info_for_profiling, false);
567
568  setPGOInstrumentor(Opts, Args, Diags);
569  Opts.InstrProfileOutput =
570      Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
571  Opts.ProfileInstrumentUsePath =
572      Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
573  if (!Opts.ProfileInstrumentUsePath.empty())
574    setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
575
576  if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
577    Opts.setClangABICompat(CodeGenOptions::ClangABI::Latest);
578
579    StringRef Ver = A->getValue();
580    std::pair<StringRef, StringRef> VerParts = Ver.split('.');
581    unsigned Major, Minor = 0;
582
583    // Check the version number is valid: either 3.x (0 <= x <= 9) or
584    // y or y.0 (4 <= y <= current version).
585    if (!VerParts.first.startswith("0") &&
586        !VerParts.first.getAsInteger(10, Major) &&
587        3 <= Major && Major <= CLANG_VERSION_MAJOR &&
588        (Major == 3 ? VerParts.second.size() == 1 &&
589                      !VerParts.second.getAsInteger(10, Minor)
590                    : VerParts.first.size() == Ver.size() ||
591                      VerParts.second == "0")) {
592      // Got a valid version number.
593      if (Major == 3 && Minor <= 8)
594        Opts.setClangABICompat(CodeGenOptions::ClangABI::Ver3_8);
595      else if (Major <= 4)
596        Opts.setClangABICompat(CodeGenOptions::ClangABI::Ver4);
597    } else if (Ver != "latest") {
598      Diags.Report(diag::err_drv_invalid_value)
599          << A->getAsString(Args) << A->getValue();
600    }
601  }
602
603  Opts.CoverageMapping =
604      Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
605  Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
606  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
607  Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
608  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
609  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
610  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
611  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
612  Opts.CodeModel = getCodeModel(Args, Diags);
613  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
614  Opts.DisableFPElim =
615      (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
616  Opts.DisableFree = Args.hasArg(OPT_disable_free);
617  Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
618  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
619  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
620  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable) ||
621                          Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
622                          Args.hasArg(OPT_cl_fast_relaxed_math);
623  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
624  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
625                       Args.hasArg(OPT_cl_finite_math_only) ||
626                       Args.hasArg(OPT_cl_fast_relaxed_math));
627  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
628                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
629                       Args.hasArg(OPT_cl_finite_math_only) ||
630                       Args.hasArg(OPT_cl_fast_relaxed_math));
631  Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
632                        Args.hasArg(OPT_cl_no_signed_zeros) ||
633                        Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
634                        Args.hasArg(OPT_cl_fast_relaxed_math));
635  Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero);
636  Opts.CorrectlyRoundedDivSqrt =
637      Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
638  Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
639  Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
640  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
641  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
642  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
643  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
644  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
645  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
646  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
647  Opts.IncrementalLinkerCompatible =
648      Args.hasArg(OPT_mincremental_linker_compatible);
649  Opts.PIECopyRelocations =
650      Args.hasArg(OPT_mpie_copy_relocations);
651  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
652  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
653  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
654  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
655  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
656  Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
657  Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
658  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
659                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
660                      Args.hasArg(OPT_cl_fast_relaxed_math);
661  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
662  Opts.RelocationModel = getRelocModel(Args, Diags);
663  Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
664  if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
665    Diags.Report(diag::err_drv_invalid_value)
666        << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
667        << Opts.ThreadModel;
668  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
669  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
670
671  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
672                                       OPT_fno_function_sections, false);
673  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
674                                   OPT_fno_data_sections, false);
675  Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
676                                         OPT_fno_unique_section_names, true);
677
678  Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
679
680  Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
681
682  Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
683  Opts.EmitSummaryIndex = false;
684  if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
685    StringRef S = A->getValue();
686    if (S == "thin")
687      Opts.EmitSummaryIndex = true;
688    else if (S != "full")
689      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
690  }
691  Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
692  if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
693    if (IK.getLanguage() != InputKind::LLVM_IR)
694      Diags.Report(diag::err_drv_argument_only_allowed_with)
695          << A->getAsString(Args) << "-x ir";
696    Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
697  }
698  Opts.ThinLinkBitcodeFile = Args.getLastArgValue(OPT_fthin_link_bitcode_EQ);
699
700  Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
701
702  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
703  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
704
705  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
706  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
707
708  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
709  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
710  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
711  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
712    Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
713    Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
714    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
715    Opts.CoverageNoFunctionNamesInData =
716        Args.hasArg(OPT_coverage_no_function_names_in_data);
717    Opts.CoverageExitBlockBeforeBody =
718        Args.hasArg(OPT_coverage_exit_block_before_body);
719    if (Args.hasArg(OPT_coverage_version_EQ)) {
720      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
721      if (CoverageVersion.size() != 4) {
722        Diags.Report(diag::err_drv_invalid_value)
723            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
724            << CoverageVersion;
725      } else {
726        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
727      }
728    }
729  }
730	// Handle -fembed-bitcode option.
731  if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
732    StringRef Name = A->getValue();
733    unsigned Model = llvm::StringSwitch<unsigned>(Name)
734        .Case("off", CodeGenOptions::Embed_Off)
735        .Case("all", CodeGenOptions::Embed_All)
736        .Case("bitcode", CodeGenOptions::Embed_Bitcode)
737        .Case("marker", CodeGenOptions::Embed_Marker)
738        .Default(~0U);
739    if (Model == ~0U) {
740      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
741      Success = false;
742    } else
743      Opts.setEmbedBitcode(
744          static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
745  }
746  // FIXME: For backend options that are not yet recorded as function
747  // attributes in the IR, keep track of them so we can embed them in a
748  // separate data section and use them when building the bitcode.
749  if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
750    for (const auto &A : Args) {
751      // Do not encode output and input.
752      if (A->getOption().getID() == options::OPT_o ||
753          A->getOption().getID() == options::OPT_INPUT ||
754          A->getOption().getID() == options::OPT_x ||
755          A->getOption().getID() == options::OPT_fembed_bitcode ||
756          (A->getOption().getGroup().isValid() &&
757           A->getOption().getGroup().getID() == options::OPT_W_Group))
758        continue;
759      ArgStringList ASL;
760      A->render(Args, ASL);
761      for (const auto &arg : ASL) {
762        StringRef ArgStr(arg);
763        Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
764        // using \00 to seperate each commandline options.
765        Opts.CmdArgs.push_back('\0');
766      }
767    }
768  }
769
770  Opts.PreserveVec3Type = Args.hasArg(OPT_fpreserve_vec3_type);
771  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
772  Opts.XRayInstrumentFunctions = Args.hasArg(OPT_fxray_instrument);
773  Opts.XRayInstructionThreshold =
774      getLastArgIntValue(Args, OPT_fxray_instruction_threshold_EQ, 200, Diags);
775  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
776  Opts.CallFEntry = Args.hasArg(OPT_mfentry);
777  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
778
779  if (const Arg *A = Args.getLastArg(OPT_compress_debug_sections,
780                                     OPT_compress_debug_sections_EQ)) {
781    if (A->getOption().getID() == OPT_compress_debug_sections) {
782      // TODO: be more clever about the compression type auto-detection
783      Opts.setCompressDebugSections(llvm::DebugCompressionType::GNU);
784    } else {
785      auto DCT = llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
786                     .Case("none", llvm::DebugCompressionType::None)
787                     .Case("zlib", llvm::DebugCompressionType::Z)
788                     .Case("zlib-gnu", llvm::DebugCompressionType::GNU)
789                     .Default(llvm::DebugCompressionType::None);
790      Opts.setCompressDebugSections(DCT);
791    }
792  }
793
794  Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
795  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
796  for (auto A : Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_cuda_bitcode)) {
797    CodeGenOptions::BitcodeFileToLink F;
798    F.Filename = A->getValue();
799    if (A->getOption().matches(OPT_mlink_cuda_bitcode)) {
800      F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
801      // When linking CUDA bitcode, propagate function attributes so that
802      // e.g. libdevice gets fast-math attrs if we're building with fast-math.
803      F.PropagateAttrs = true;
804      F.Internalize = true;
805    }
806    Opts.LinkBitcodeFiles.push_back(F);
807  }
808  Opts.SanitizeCoverageType =
809      getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
810  Opts.SanitizeCoverageIndirectCalls =
811      Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
812  Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
813  Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
814  Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
815  Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
816  Opts.SanitizeCoverage8bitCounters =
817      Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
818  Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
819  Opts.SanitizeCoverageTracePCGuard =
820      Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
821  Opts.SanitizeCoverageNoPrune = Args.hasArg(OPT_fsanitize_coverage_no_prune);
822  Opts.SanitizeCoverageInline8bitCounters =
823      Args.hasArg(OPT_fsanitize_coverage_inline_8bit_counters);
824  Opts.SanitizeMemoryTrackOrigins =
825      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
826  Opts.SanitizeMemoryUseAfterDtor =
827      Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
828  Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
829  Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
830  if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
831                               OPT_fno_sanitize_address_use_after_scope)) {
832    Opts.SanitizeAddressUseAfterScope =
833        A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
834  }
835  Opts.SanitizeAddressGlobalsDeadStripping =
836      Args.hasArg(OPT_fsanitize_address_globals_dead_stripping);
837  Opts.SSPBufferSize =
838      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
839  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
840  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
841    StringRef Val = A->getValue();
842    unsigned StackAlignment = Opts.StackAlignment;
843    Val.getAsInteger(10, StackAlignment);
844    Opts.StackAlignment = StackAlignment;
845  }
846
847  if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
848    StringRef Val = A->getValue();
849    unsigned StackProbeSize = Opts.StackProbeSize;
850    Val.getAsInteger(0, StackProbeSize);
851    Opts.StackProbeSize = StackProbeSize;
852  }
853
854  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
855    StringRef Name = A->getValue();
856    unsigned Method = llvm::StringSwitch<unsigned>(Name)
857      .Case("legacy", CodeGenOptions::Legacy)
858      .Case("non-legacy", CodeGenOptions::NonLegacy)
859      .Case("mixed", CodeGenOptions::Mixed)
860      .Default(~0U);
861    if (Method == ~0U) {
862      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
863      Success = false;
864    } else {
865      Opts.setObjCDispatchMethod(
866        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
867    }
868  }
869
870  Opts.EmulatedTLS =
871      Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
872
873  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
874    StringRef Name = A->getValue();
875    unsigned Model = llvm::StringSwitch<unsigned>(Name)
876        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
877        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
878        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
879        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
880        .Default(~0U);
881    if (Model == ~0U) {
882      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
883      Success = false;
884    } else {
885      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
886    }
887  }
888
889  if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
890    StringRef Val = A->getValue();
891    if (Val == "ieee")
892      Opts.FPDenormalMode = "ieee";
893    else if (Val == "preserve-sign")
894      Opts.FPDenormalMode = "preserve-sign";
895    else if (Val == "positive-zero")
896      Opts.FPDenormalMode = "positive-zero";
897    else
898      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
899  }
900
901  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
902    if (A->getOption().matches(OPT_fpcc_struct_return)) {
903      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
904    } else {
905      assert(A->getOption().matches(OPT_freg_struct_return));
906      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
907    }
908  }
909
910  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
911  Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
912  bool NeedLocTracking = false;
913
914  Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
915  if (!Opts.OptRecordFile.empty())
916    NeedLocTracking = true;
917
918  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
919    Opts.OptimizationRemarkPattern =
920        GenerateOptimizationRemarkRegex(Diags, Args, A);
921    NeedLocTracking = true;
922  }
923
924  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
925    Opts.OptimizationRemarkMissedPattern =
926        GenerateOptimizationRemarkRegex(Diags, Args, A);
927    NeedLocTracking = true;
928  }
929
930  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
931    Opts.OptimizationRemarkAnalysisPattern =
932        GenerateOptimizationRemarkRegex(Diags, Args, A);
933    NeedLocTracking = true;
934  }
935
936  Opts.DiagnosticsWithHotness =
937      Args.hasArg(options::OPT_fdiagnostics_show_hotness);
938  bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
939  bool UsingProfile = UsingSampleProfile ||
940      (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
941
942  if (Opts.DiagnosticsWithHotness && !UsingProfile)
943    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
944        << "-fdiagnostics-show-hotness";
945
946  Opts.DiagnosticsHotnessThreshold = getLastArgUInt64Value(
947      Args, options::OPT_fdiagnostics_hotness_threshold_EQ, 0);
948  if (Opts.DiagnosticsHotnessThreshold > 0 && !UsingProfile)
949    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
950        << "-fdiagnostics-hotness-threshold=";
951
952  // If the user requested to use a sample profile for PGO, then the
953  // backend will need to track source location information so the profile
954  // can be incorporated into the IR.
955  if (UsingSampleProfile)
956    NeedLocTracking = true;
957
958  // If the user requested a flag that requires source locations available in
959  // the backend, make sure that the backend tracks source location information.
960  if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
961    Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
962
963  Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
964
965  // Parse -fsanitize-recover= arguments.
966  // FIXME: Report unrecoverable sanitizers incorrectly specified here.
967  parseSanitizerKinds("-fsanitize-recover=",
968                      Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
969                      Opts.SanitizeRecover);
970  parseSanitizerKinds("-fsanitize-trap=",
971                      Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
972                      Opts.SanitizeTrap);
973
974  Opts.CudaGpuBinaryFileNames =
975      Args.getAllArgValues(OPT_fcuda_include_gpubinary);
976
977  Opts.Backchain = Args.hasArg(OPT_mbackchain);
978
979  Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
980      Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
981
982  return Success;
983}
984
985static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
986                                      ArgList &Args) {
987  using namespace options;
988  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
989  Opts.Targets = Args.getAllArgValues(OPT_MT);
990  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
991  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
992  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
993  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
994  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
995  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
996  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
997  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
998  Opts.ModuleDependencyOutputDir =
999      Args.getLastArgValue(OPT_module_dependency_dir);
1000  if (Args.hasArg(OPT_MV))
1001    Opts.OutputFormat = DependencyOutputFormat::NMake;
1002  // Add sanitizer blacklists as extra dependencies.
1003  // They won't be discovered by the regular preprocessor, so
1004  // we let make / ninja to know about this implicit dependency.
1005  Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
1006  auto ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1007  Opts.ExtraDeps.insert(Opts.ExtraDeps.end(), ModuleFiles.begin(),
1008                        ModuleFiles.end());
1009}
1010
1011static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
1012  // Color diagnostics default to auto ("on" if terminal supports) in the driver
1013  // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
1014  // Support both clang's -f[no-]color-diagnostics and gcc's
1015  // -f[no-]diagnostics-colors[=never|always|auto].
1016  enum {
1017    Colors_On,
1018    Colors_Off,
1019    Colors_Auto
1020  } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
1021  for (Arg *A : Args) {
1022    const Option &O = A->getOption();
1023    if (O.matches(options::OPT_fcolor_diagnostics) ||
1024        O.matches(options::OPT_fdiagnostics_color)) {
1025      ShowColors = Colors_On;
1026    } else if (O.matches(options::OPT_fno_color_diagnostics) ||
1027               O.matches(options::OPT_fno_diagnostics_color)) {
1028      ShowColors = Colors_Off;
1029    } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
1030      StringRef Value(A->getValue());
1031      if (Value == "always")
1032        ShowColors = Colors_On;
1033      else if (Value == "never")
1034        ShowColors = Colors_Off;
1035      else if (Value == "auto")
1036        ShowColors = Colors_Auto;
1037    }
1038  }
1039  return ShowColors == Colors_On ||
1040         (ShowColors == Colors_Auto &&
1041          llvm::sys::Process::StandardErrHasColors());
1042}
1043
1044bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1045                                DiagnosticsEngine *Diags,
1046                                bool DefaultDiagColor, bool DefaultShowOpt) {
1047  using namespace options;
1048  bool Success = true;
1049
1050  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1051  if (Arg *A =
1052          Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
1053    Opts.DiagnosticSerializationFile = A->getValue();
1054  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1055  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1056  Opts.Pedantic = Args.hasArg(OPT_pedantic);
1057  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1058  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1059  Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
1060  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1061                                 OPT_fno_show_column,
1062                                 /*Default=*/true);
1063  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1064  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1065  Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
1066  Opts.ShowOptionNames =
1067      Args.hasFlag(OPT_fdiagnostics_show_option,
1068                   OPT_fno_diagnostics_show_option, DefaultShowOpt);
1069
1070  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
1071
1072  // Default behavior is to not to show note include stacks.
1073  Opts.ShowNoteIncludeStack = false;
1074  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1075                               OPT_fno_diagnostics_show_note_include_stack))
1076    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1077      Opts.ShowNoteIncludeStack = true;
1078
1079  StringRef ShowOverloads =
1080    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1081  if (ShowOverloads == "best")
1082    Opts.setShowOverloads(Ovl_Best);
1083  else if (ShowOverloads == "all")
1084    Opts.setShowOverloads(Ovl_All);
1085  else {
1086    Success = false;
1087    if (Diags)
1088      Diags->Report(diag::err_drv_invalid_value)
1089      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1090      << ShowOverloads;
1091  }
1092
1093  StringRef ShowCategory =
1094    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1095  if (ShowCategory == "none")
1096    Opts.ShowCategories = 0;
1097  else if (ShowCategory == "id")
1098    Opts.ShowCategories = 1;
1099  else if (ShowCategory == "name")
1100    Opts.ShowCategories = 2;
1101  else {
1102    Success = false;
1103    if (Diags)
1104      Diags->Report(diag::err_drv_invalid_value)
1105      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1106      << ShowCategory;
1107  }
1108
1109  StringRef Format =
1110    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1111  if (Format == "clang")
1112    Opts.setFormat(DiagnosticOptions::Clang);
1113  else if (Format == "msvc")
1114    Opts.setFormat(DiagnosticOptions::MSVC);
1115  else if (Format == "msvc-fallback") {
1116    Opts.setFormat(DiagnosticOptions::MSVC);
1117    Opts.CLFallbackMode = true;
1118  } else if (Format == "vi")
1119    Opts.setFormat(DiagnosticOptions::Vi);
1120  else {
1121    Success = false;
1122    if (Diags)
1123      Diags->Report(diag::err_drv_invalid_value)
1124      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1125      << Format;
1126  }
1127
1128  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1129  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1130  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1131  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1132  DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1133  Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1134    Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1135    Diags, DiagMask);
1136  if (Args.hasArg(OPT_verify_ignore_unexpected))
1137    DiagMask = DiagnosticLevelMask::All;
1138  Opts.setVerifyIgnoreUnexpected(DiagMask);
1139  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1140  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1141  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1142  Opts.MacroBacktraceLimit =
1143      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1144                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1145  Opts.TemplateBacktraceLimit = getLastArgIntValue(
1146      Args, OPT_ftemplate_backtrace_limit,
1147      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1148  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1149      Args, OPT_fconstexpr_backtrace_limit,
1150      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1151  Opts.SpellCheckingLimit = getLastArgIntValue(
1152      Args, OPT_fspell_checking_limit,
1153      DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1154  Opts.SnippetLineLimit = getLastArgIntValue(
1155      Args, OPT_fcaret_diagnostics_max_lines,
1156      DiagnosticOptions::DefaultSnippetLineLimit, Diags);
1157  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1158                                    DiagnosticOptions::DefaultTabStop, Diags);
1159  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1160    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1161    if (Diags)
1162      Diags->Report(diag::warn_ignoring_ftabstop_value)
1163      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1164  }
1165  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1166  addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1167  addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1168
1169  return Success;
1170}
1171
1172static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1173  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1174}
1175
1176/// Parse the argument to the -ftest-module-file-extension
1177/// command-line argument.
1178///
1179/// \returns true on error, false on success.
1180static bool parseTestModuleFileExtensionArg(StringRef Arg,
1181                                            std::string &BlockName,
1182                                            unsigned &MajorVersion,
1183                                            unsigned &MinorVersion,
1184                                            bool &Hashed,
1185                                            std::string &UserInfo) {
1186  SmallVector<StringRef, 5> Args;
1187  Arg.split(Args, ':', 5);
1188  if (Args.size() < 5)
1189    return true;
1190
1191  BlockName = Args[0];
1192  if (Args[1].getAsInteger(10, MajorVersion)) return true;
1193  if (Args[2].getAsInteger(10, MinorVersion)) return true;
1194  if (Args[3].getAsInteger(2, Hashed)) return true;
1195  if (Args.size() > 4)
1196    UserInfo = Args[4];
1197  return false;
1198}
1199
1200static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1201                                   DiagnosticsEngine &Diags,
1202                                   bool &IsHeaderFile) {
1203  using namespace options;
1204  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1205  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1206    switch (A->getOption().getID()) {
1207    default:
1208      llvm_unreachable("Invalid option in group!");
1209    case OPT_ast_list:
1210      Opts.ProgramAction = frontend::ASTDeclList; break;
1211    case OPT_ast_dump:
1212    case OPT_ast_dump_all:
1213    case OPT_ast_dump_lookups:
1214      Opts.ProgramAction = frontend::ASTDump; break;
1215    case OPT_ast_print:
1216      Opts.ProgramAction = frontend::ASTPrint; break;
1217    case OPT_ast_view:
1218      Opts.ProgramAction = frontend::ASTView; break;
1219    case OPT_dump_raw_tokens:
1220      Opts.ProgramAction = frontend::DumpRawTokens; break;
1221    case OPT_dump_tokens:
1222      Opts.ProgramAction = frontend::DumpTokens; break;
1223    case OPT_S:
1224      Opts.ProgramAction = frontend::EmitAssembly; break;
1225    case OPT_emit_llvm_bc:
1226      Opts.ProgramAction = frontend::EmitBC; break;
1227    case OPT_emit_html:
1228      Opts.ProgramAction = frontend::EmitHTML; break;
1229    case OPT_emit_llvm:
1230      Opts.ProgramAction = frontend::EmitLLVM; break;
1231    case OPT_emit_llvm_only:
1232      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1233    case OPT_emit_codegen_only:
1234      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1235    case OPT_emit_obj:
1236      Opts.ProgramAction = frontend::EmitObj; break;
1237    case OPT_fixit_EQ:
1238      Opts.FixItSuffix = A->getValue();
1239      // fall-through!
1240    case OPT_fixit:
1241      Opts.ProgramAction = frontend::FixIt; break;
1242    case OPT_emit_module:
1243      Opts.ProgramAction = frontend::GenerateModule; break;
1244    case OPT_emit_module_interface:
1245      Opts.ProgramAction = frontend::GenerateModuleInterface; break;
1246    case OPT_emit_pch:
1247      Opts.ProgramAction = frontend::GeneratePCH; break;
1248    case OPT_emit_pth:
1249      Opts.ProgramAction = frontend::GeneratePTH; break;
1250    case OPT_init_only:
1251      Opts.ProgramAction = frontend::InitOnly; break;
1252    case OPT_fsyntax_only:
1253      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1254    case OPT_module_file_info:
1255      Opts.ProgramAction = frontend::ModuleFileInfo; break;
1256    case OPT_verify_pch:
1257      Opts.ProgramAction = frontend::VerifyPCH; break;
1258    case OPT_print_decl_contexts:
1259      Opts.ProgramAction = frontend::PrintDeclContext; break;
1260    case OPT_print_preamble:
1261      Opts.ProgramAction = frontend::PrintPreamble; break;
1262    case OPT_E:
1263      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1264    case OPT_rewrite_macros:
1265      Opts.ProgramAction = frontend::RewriteMacros; break;
1266    case OPT_rewrite_objc:
1267      Opts.ProgramAction = frontend::RewriteObjC; break;
1268    case OPT_rewrite_test:
1269      Opts.ProgramAction = frontend::RewriteTest; break;
1270    case OPT_analyze:
1271      Opts.ProgramAction = frontend::RunAnalysis; break;
1272    case OPT_migrate:
1273      Opts.ProgramAction = frontend::MigrateSource; break;
1274    case OPT_Eonly:
1275      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1276    }
1277  }
1278
1279  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1280    Opts.Plugins.emplace_back(A->getValue(0));
1281    Opts.ProgramAction = frontend::PluginAction;
1282    Opts.ActionName = A->getValue();
1283  }
1284  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1285  for (const Arg *AA : Args.filtered(OPT_plugin_arg))
1286    Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1287
1288  for (const std::string &Arg :
1289         Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1290    std::string BlockName;
1291    unsigned MajorVersion;
1292    unsigned MinorVersion;
1293    bool Hashed;
1294    std::string UserInfo;
1295    if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1296                                        MinorVersion, Hashed, UserInfo)) {
1297      Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1298
1299      continue;
1300    }
1301
1302    // Add the testing module file extension.
1303    Opts.ModuleFileExtensions.push_back(
1304        std::make_shared<TestModuleFileExtension>(
1305            BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
1306  }
1307
1308  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1309    Opts.CodeCompletionAt =
1310      ParsedSourceLocation::FromString(A->getValue());
1311    if (Opts.CodeCompletionAt.FileName.empty())
1312      Diags.Report(diag::err_drv_invalid_value)
1313        << A->getAsString(Args) << A->getValue();
1314  }
1315  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1316
1317  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1318  Opts.Plugins = Args.getAllArgValues(OPT_load);
1319  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1320  Opts.ShowHelp = Args.hasArg(OPT_help);
1321  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1322  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1323  Opts.ShowVersion = Args.hasArg(OPT_version);
1324  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1325  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1326  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1327  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1328  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1329  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1330  Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1331  Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all);
1332  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1333  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1334  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1335  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1336  Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1337  Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1338  Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1339  Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1340  Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1341
1342  Opts.CodeCompleteOpts.IncludeMacros
1343    = Args.hasArg(OPT_code_completion_macros);
1344  Opts.CodeCompleteOpts.IncludeCodePatterns
1345    = Args.hasArg(OPT_code_completion_patterns);
1346  Opts.CodeCompleteOpts.IncludeGlobals
1347    = !Args.hasArg(OPT_no_code_completion_globals);
1348  Opts.CodeCompleteOpts.IncludeBriefComments
1349    = Args.hasArg(OPT_code_completion_brief_comments);
1350
1351  Opts.OverrideRecordLayoutsFile
1352    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1353  Opts.AuxTriple =
1354      llvm::Triple::normalize(Args.getLastArgValue(OPT_aux_triple));
1355  Opts.FindPchSource = Args.getLastArgValue(OPT_find_pch_source_EQ);
1356  Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
1357
1358  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1359                                     OPT_arcmt_modify,
1360                                     OPT_arcmt_migrate)) {
1361    switch (A->getOption().getID()) {
1362    default:
1363      llvm_unreachable("missed a case");
1364    case OPT_arcmt_check:
1365      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1366      break;
1367    case OPT_arcmt_modify:
1368      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1369      break;
1370    case OPT_arcmt_migrate:
1371      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1372      break;
1373    }
1374  }
1375  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1376  Opts.ARCMTMigrateReportOut
1377    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1378  Opts.ARCMTMigrateEmitARCErrors
1379    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1380
1381  if (Args.hasArg(OPT_objcmt_migrate_literals))
1382    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1383  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1384    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1385  if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1386    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1387  if (Args.hasArg(OPT_objcmt_migrate_property))
1388    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1389  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1390    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1391  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1392    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1393  if (Args.hasArg(OPT_objcmt_migrate_annotation))
1394    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1395  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1396    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1397  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1398    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1399  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1400    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1401  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1402    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1403  if (Args.hasArg(OPT_objcmt_atomic_property))
1404    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1405  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1406    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1407  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1408    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1409  if (Args.hasArg(OPT_objcmt_migrate_all))
1410    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1411
1412  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1413
1414  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1415      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1416    Diags.Report(diag::err_drv_argument_not_allowed_with)
1417      << "ARC migration" << "ObjC migration";
1418  }
1419
1420  InputKind DashX(InputKind::Unknown);
1421  if (const Arg *A = Args.getLastArg(OPT_x)) {
1422    StringRef XValue = A->getValue();
1423
1424    // Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
1425    // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
1426    bool Preprocessed = XValue.consume_back("-cpp-output");
1427    bool ModuleMap = XValue.consume_back("-module-map");
1428    IsHeaderFile =
1429        !Preprocessed && !ModuleMap && XValue.consume_back("-header");
1430
1431    // Principal languages.
1432    DashX = llvm::StringSwitch<InputKind>(XValue)
1433                .Case("c", InputKind::C)
1434                .Case("cl", InputKind::OpenCL)
1435                .Case("cuda", InputKind::CUDA)
1436                .Case("c++", InputKind::CXX)
1437                .Case("objective-c", InputKind::ObjC)
1438                .Case("objective-c++", InputKind::ObjCXX)
1439                .Case("renderscript", InputKind::RenderScript)
1440                .Default(InputKind::Unknown);
1441
1442    // "objc[++]-cpp-output" is an acceptable synonym for
1443    // "objective-c[++]-cpp-output".
1444    if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
1445      DashX = llvm::StringSwitch<InputKind>(XValue)
1446                  .Case("objc", InputKind::ObjC)
1447                  .Case("objc++", InputKind::ObjCXX)
1448                  .Default(InputKind::Unknown);
1449
1450    // Some special cases cannot be combined with suffixes.
1451    if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
1452      DashX = llvm::StringSwitch<InputKind>(XValue)
1453                  .Case("cpp-output", InputKind(InputKind::C).getPreprocessed())
1454                  .Case("assembler-with-cpp", InputKind::Asm)
1455                  .Cases("ast", "pcm",
1456                         InputKind(InputKind::Unknown, InputKind::Precompiled))
1457                  .Case("ir", InputKind::LLVM_IR)
1458                  .Default(InputKind::Unknown);
1459
1460    if (DashX.isUnknown())
1461      Diags.Report(diag::err_drv_invalid_value)
1462        << A->getAsString(Args) << A->getValue();
1463
1464    if (Preprocessed)
1465      DashX = DashX.getPreprocessed();
1466    if (ModuleMap)
1467      DashX = DashX.withFormat(InputKind::ModuleMap);
1468  }
1469
1470  // '-' is the default input if none is given.
1471  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1472  Opts.Inputs.clear();
1473  if (Inputs.empty())
1474    Inputs.push_back("-");
1475  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1476    InputKind IK = DashX;
1477    if (IK.isUnknown()) {
1478      IK = FrontendOptions::getInputKindForExtension(
1479        StringRef(Inputs[i]).rsplit('.').second);
1480      // FIXME: Warn on this?
1481      if (IK.isUnknown())
1482        IK = InputKind::C;
1483      // FIXME: Remove this hack.
1484      if (i == 0)
1485        DashX = IK;
1486    }
1487
1488    // The -emit-module action implicitly takes a module map.
1489    if (Opts.ProgramAction == frontend::GenerateModule &&
1490        IK.getFormat() == InputKind::Source)
1491      IK = IK.withFormat(InputKind::ModuleMap);
1492
1493    Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1494  }
1495
1496  return DashX;
1497}
1498
1499std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1500                                                 void *MainAddr) {
1501  std::string ClangExecutable =
1502      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1503  StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1504
1505  // Compute the path to the resource directory.
1506  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1507  SmallString<128> P(Dir);
1508  if (ClangResourceDir != "")
1509    llvm::sys::path::append(P, ClangResourceDir);
1510  else
1511    llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1512                            "clang", CLANG_VERSION_STRING);
1513
1514  return P.str();
1515}
1516
1517static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
1518                                  const std::string &WorkingDir) {
1519  using namespace options;
1520  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1521  Opts.Verbose = Args.hasArg(OPT_v);
1522  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1523  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1524  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1525  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1526    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1527  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1528
1529  // Canonicalize -fmodules-cache-path before storing it.
1530  SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
1531  if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
1532    if (WorkingDir.empty())
1533      llvm::sys::fs::make_absolute(P);
1534    else
1535      llvm::sys::fs::make_absolute(WorkingDir, P);
1536  }
1537  llvm::sys::path::remove_dots(P);
1538  Opts.ModuleCachePath = P.str();
1539
1540  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1541  for (const Arg *A : Args.filtered(OPT_fprebuilt_module_path))
1542    Opts.AddPrebuiltModulePath(A->getValue());
1543  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1544  Opts.ModulesHashContent = Args.hasArg(OPT_fmodules_hash_content);
1545  Opts.ModulesValidateDiagnosticOptions =
1546      !Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
1547  Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1548  Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1549  Opts.ModuleCachePruneInterval =
1550      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1551  Opts.ModuleCachePruneAfter =
1552      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1553  Opts.ModulesValidateOncePerBuildSession =
1554      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1555  Opts.BuildSessionTimestamp =
1556      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1557  Opts.ModulesValidateSystemHeaders =
1558      Args.hasArg(OPT_fmodules_validate_system_headers);
1559  if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1560    Opts.ModuleFormat = A->getValue();
1561
1562  for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1563    StringRef MacroDef = A->getValue();
1564    Opts.ModulesIgnoreMacros.insert(
1565        llvm::CachedHashString(MacroDef.split('=').first));
1566  }
1567
1568  // Add -I..., -F..., and -index-header-map options in order.
1569  bool IsIndexHeaderMap = false;
1570  bool IsSysrootSpecified =
1571      Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1572  for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1573    if (A->getOption().matches(OPT_index_header_map)) {
1574      // -index-header-map applies to the next -I or -F.
1575      IsIndexHeaderMap = true;
1576      continue;
1577    }
1578
1579    frontend::IncludeDirGroup Group =
1580        IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1581
1582    bool IsFramework = A->getOption().matches(OPT_F);
1583    std::string Path = A->getValue();
1584
1585    if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1586      SmallString<32> Buffer;
1587      llvm::sys::path::append(Buffer, Opts.Sysroot,
1588                              llvm::StringRef(A->getValue()).substr(1));
1589      Path = Buffer.str();
1590    }
1591
1592    Opts.AddPath(Path, Group, IsFramework,
1593                 /*IgnoreSysroot*/ true);
1594    IsIndexHeaderMap = false;
1595  }
1596
1597  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1598  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1599  for (const Arg *A :
1600       Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1601    if (A->getOption().matches(OPT_iprefix))
1602      Prefix = A->getValue();
1603    else if (A->getOption().matches(OPT_iwithprefix))
1604      Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1605    else
1606      Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1607  }
1608
1609  for (const Arg *A : Args.filtered(OPT_idirafter))
1610    Opts.AddPath(A->getValue(), frontend::After, false, true);
1611  for (const Arg *A : Args.filtered(OPT_iquote))
1612    Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1613  for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1614    Opts.AddPath(A->getValue(), frontend::System, false,
1615                 !A->getOption().matches(OPT_iwithsysroot));
1616  for (const Arg *A : Args.filtered(OPT_iframework))
1617    Opts.AddPath(A->getValue(), frontend::System, true, true);
1618  for (const Arg *A : Args.filtered(OPT_iframeworkwithsysroot))
1619    Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
1620                 /*IgnoreSysRoot=*/false);
1621
1622  // Add the paths for the various language specific isystem flags.
1623  for (const Arg *A : Args.filtered(OPT_c_isystem))
1624    Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1625  for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1626    Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1627  for (const Arg *A : Args.filtered(OPT_objc_isystem))
1628    Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1629  for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1630    Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1631
1632  // Add the internal paths from a driver that detects standard include paths.
1633  for (const Arg *A :
1634       Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1635    frontend::IncludeDirGroup Group = frontend::System;
1636    if (A->getOption().matches(OPT_internal_externc_isystem))
1637      Group = frontend::ExternCSystem;
1638    Opts.AddPath(A->getValue(), Group, false, true);
1639  }
1640
1641  // Add the path prefixes which are implicitly treated as being system headers.
1642  for (const Arg *A :
1643       Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1644    Opts.AddSystemHeaderPrefix(
1645        A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1646
1647  for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1648    Opts.AddVFSOverlayFile(A->getValue());
1649}
1650
1651void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1652                                         const llvm::Triple &T,
1653                                         PreprocessorOptions &PPOpts,
1654                                         LangStandard::Kind LangStd) {
1655  // Set some properties which depend solely on the input kind; it would be nice
1656  // to move these to the language standard, and have the driver resolve the
1657  // input kind + language standard.
1658  //
1659  // FIXME: Perhaps a better model would be for a single source file to have
1660  // multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
1661  // simultaneously active?
1662  if (IK.getLanguage() == InputKind::Asm) {
1663    Opts.AsmPreprocessor = 1;
1664  } else if (IK.isObjectiveC()) {
1665    Opts.ObjC1 = Opts.ObjC2 = 1;
1666  }
1667
1668  if (LangStd == LangStandard::lang_unspecified) {
1669    // Based on the base language, pick one.
1670    switch (IK.getLanguage()) {
1671    case InputKind::Unknown:
1672    case InputKind::LLVM_IR:
1673      llvm_unreachable("Invalid input kind!");
1674    case InputKind::OpenCL:
1675      LangStd = LangStandard::lang_opencl10;
1676      break;
1677    case InputKind::CUDA:
1678      LangStd = LangStandard::lang_cuda;
1679      break;
1680    case InputKind::Asm:
1681    case InputKind::C:
1682      // The PS4 uses C99 as the default C standard.
1683      if (T.isPS4())
1684        LangStd = LangStandard::lang_gnu99;
1685      else
1686        LangStd = LangStandard::lang_gnu11;
1687      break;
1688    case InputKind::ObjC:
1689      LangStd = LangStandard::lang_gnu11;
1690      break;
1691    case InputKind::CXX:
1692    case InputKind::ObjCXX:
1693      // The PS4 uses C++11 as the default C++ standard.
1694      if (T.isPS4())
1695        LangStd = LangStandard::lang_gnucxx11;
1696      else
1697        LangStd = LangStandard::lang_gnucxx98;
1698      break;
1699    case InputKind::RenderScript:
1700      LangStd = LangStandard::lang_c99;
1701      break;
1702    }
1703  }
1704
1705  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1706  Opts.LineComment = Std.hasLineComments();
1707  Opts.C99 = Std.isC99();
1708  Opts.C11 = Std.isC11();
1709  Opts.CPlusPlus = Std.isCPlusPlus();
1710  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1711  Opts.CPlusPlus14 = Std.isCPlusPlus14();
1712  Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1713  Opts.CPlusPlus2a = Std.isCPlusPlus2a();
1714  Opts.Digraphs = Std.hasDigraphs();
1715  Opts.GNUMode = Std.isGNUMode();
1716  Opts.GNUInline = !Opts.C99 && !Opts.CPlusPlus;
1717  Opts.HexFloats = Std.hasHexFloats();
1718  Opts.ImplicitInt = Std.hasImplicitInt();
1719
1720  // Set OpenCL Version.
1721  Opts.OpenCL = Std.isOpenCL();
1722  if (LangStd == LangStandard::lang_opencl10)
1723    Opts.OpenCLVersion = 100;
1724  else if (LangStd == LangStandard::lang_opencl11)
1725    Opts.OpenCLVersion = 110;
1726  else if (LangStd == LangStandard::lang_opencl12)
1727    Opts.OpenCLVersion = 120;
1728  else if (LangStd == LangStandard::lang_opencl20)
1729    Opts.OpenCLVersion = 200;
1730
1731  // OpenCL has some additional defaults.
1732  if (Opts.OpenCL) {
1733    Opts.AltiVec = 0;
1734    Opts.ZVector = 0;
1735    Opts.LaxVectorConversions = 0;
1736    Opts.setDefaultFPContractMode(LangOptions::FPC_On);
1737    Opts.NativeHalfType = 1;
1738    Opts.NativeHalfArgsAndReturns = 1;
1739    // Include default header file for OpenCL.
1740    if (Opts.IncludeDefaultHeader) {
1741      PPOpts.Includes.push_back("opencl-c.h");
1742    }
1743  }
1744
1745  Opts.CUDA = IK.getLanguage() == InputKind::CUDA;
1746  if (Opts.CUDA)
1747    // Set default FP_CONTRACT to FAST.
1748    Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
1749
1750  Opts.RenderScript = IK.getLanguage() == InputKind::RenderScript;
1751  if (Opts.RenderScript) {
1752    Opts.NativeHalfType = 1;
1753    Opts.NativeHalfArgsAndReturns = 1;
1754  }
1755
1756  // OpenCL and C++ both have bool, true, false keywords.
1757  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1758
1759  // OpenCL has half keyword
1760  Opts.Half = Opts.OpenCL;
1761
1762  // C++ has wchar_t keyword.
1763  Opts.WChar = Opts.CPlusPlus;
1764
1765  Opts.GNUKeywords = Opts.GNUMode;
1766  Opts.CXXOperatorNames = Opts.CPlusPlus;
1767
1768  Opts.AlignedAllocation = Opts.CPlusPlus1z;
1769
1770  Opts.DollarIdents = !Opts.AsmPreprocessor;
1771}
1772
1773/// Attempt to parse a visibility value out of the given argument.
1774static Visibility parseVisibility(Arg *arg, ArgList &args,
1775                                  DiagnosticsEngine &diags) {
1776  StringRef value = arg->getValue();
1777  if (value == "default") {
1778    return DefaultVisibility;
1779  } else if (value == "hidden" || value == "internal") {
1780    return HiddenVisibility;
1781  } else if (value == "protected") {
1782    // FIXME: diagnose if target does not support protected visibility
1783    return ProtectedVisibility;
1784  }
1785
1786  diags.Report(diag::err_drv_invalid_value)
1787    << arg->getAsString(args) << value;
1788  return DefaultVisibility;
1789}
1790
1791/// Check if input file kind and language standard are compatible.
1792static bool IsInputCompatibleWithStandard(InputKind IK,
1793                                          const LangStandard &S) {
1794  switch (IK.getLanguage()) {
1795  case InputKind::Unknown:
1796  case InputKind::LLVM_IR:
1797    llvm_unreachable("should not parse language flags for this input");
1798
1799  case InputKind::C:
1800  case InputKind::ObjC:
1801  case InputKind::RenderScript:
1802    return S.getLanguage() == InputKind::C;
1803
1804  case InputKind::OpenCL:
1805    return S.getLanguage() == InputKind::OpenCL;
1806
1807  case InputKind::CXX:
1808  case InputKind::ObjCXX:
1809    return S.getLanguage() == InputKind::CXX;
1810
1811  case InputKind::CUDA:
1812    // FIXME: What -std= values should be permitted for CUDA compilations?
1813    return S.getLanguage() == InputKind::CUDA ||
1814           S.getLanguage() == InputKind::CXX;
1815
1816  case InputKind::Asm:
1817    // Accept (and ignore) all -std= values.
1818    // FIXME: The -std= value is not ignored; it affects the tokenization
1819    // and preprocessing rules if we're preprocessing this asm input.
1820    return true;
1821  }
1822
1823  llvm_unreachable("unexpected input language");
1824}
1825
1826/// Get language name for given input kind.
1827static const StringRef GetInputKindName(InputKind IK) {
1828  switch (IK.getLanguage()) {
1829  case InputKind::C:
1830    return "C";
1831  case InputKind::ObjC:
1832    return "Objective-C";
1833  case InputKind::CXX:
1834    return "C++";
1835  case InputKind::ObjCXX:
1836    return "Objective-C++";
1837  case InputKind::OpenCL:
1838    return "OpenCL";
1839  case InputKind::CUDA:
1840    return "CUDA";
1841  case InputKind::RenderScript:
1842    return "RenderScript";
1843
1844  case InputKind::Asm:
1845    return "Asm";
1846  case InputKind::LLVM_IR:
1847    return "LLVM IR";
1848
1849  case InputKind::Unknown:
1850    break;
1851  }
1852  llvm_unreachable("unknown input language");
1853}
1854
1855static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1856                          const TargetOptions &TargetOpts,
1857                          PreprocessorOptions &PPOpts,
1858                          DiagnosticsEngine &Diags) {
1859  // FIXME: Cleanup per-file based stuff.
1860  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1861  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1862    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1863#define LANGSTANDARD(id, name, lang, desc, features) \
1864      .Case(name, LangStandard::lang_##id)
1865#define LANGSTANDARD_ALIAS(id, alias) \
1866      .Case(alias, LangStandard::lang_##id)
1867#include "clang/Frontend/LangStandards.def"
1868      .Default(LangStandard::lang_unspecified);
1869    if (LangStd == LangStandard::lang_unspecified) {
1870      Diags.Report(diag::err_drv_invalid_value)
1871        << A->getAsString(Args) << A->getValue();
1872      // Report supported standards with short description.
1873      for (unsigned KindValue = 0;
1874           KindValue != LangStandard::lang_unspecified;
1875           ++KindValue) {
1876        const LangStandard &Std = LangStandard::getLangStandardForKind(
1877          static_cast<LangStandard::Kind>(KindValue));
1878        if (IsInputCompatibleWithStandard(IK, Std)) {
1879          auto Diag = Diags.Report(diag::note_drv_use_standard);
1880          Diag << Std.getName() << Std.getDescription();
1881          unsigned NumAliases = 0;
1882#define LANGSTANDARD(id, name, lang, desc, features)
1883#define LANGSTANDARD_ALIAS(id, alias) \
1884          if (KindValue == LangStandard::lang_##id) ++NumAliases;
1885#define LANGSTANDARD_ALIAS_DEPR(id, alias)
1886#include "clang/Frontend/LangStandards.def"
1887          Diag << NumAliases;
1888#define LANGSTANDARD(id, name, lang, desc, features)
1889#define LANGSTANDARD_ALIAS(id, alias) \
1890          if (KindValue == LangStandard::lang_##id) Diag << alias;
1891#define LANGSTANDARD_ALIAS_DEPR(id, alias)
1892#include "clang/Frontend/LangStandards.def"
1893        }
1894      }
1895    } else {
1896      // Valid standard, check to make sure language and standard are
1897      // compatible.
1898      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1899      if (!IsInputCompatibleWithStandard(IK, Std)) {
1900        Diags.Report(diag::err_drv_argument_not_allowed_with)
1901          << A->getAsString(Args) << GetInputKindName(IK);
1902      }
1903    }
1904  }
1905
1906  // -cl-std only applies for OpenCL language standards.
1907  // Override the -std option in this case.
1908  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1909    LangStandard::Kind OpenCLLangStd
1910      = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1911        .Cases("cl", "CL", LangStandard::lang_opencl10)
1912        .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
1913        .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
1914        .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
1915        .Default(LangStandard::lang_unspecified);
1916
1917    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1918      Diags.Report(diag::err_drv_invalid_value)
1919        << A->getAsString(Args) << A->getValue();
1920    }
1921    else
1922      LangStd = OpenCLLangStd;
1923  }
1924
1925  Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
1926
1927  llvm::Triple T(TargetOpts.Triple);
1928  CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
1929
1930  // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
1931  // This option should be deprecated for CL > 1.0 because
1932  // this option was added for compatibility with OpenCL 1.0.
1933  if (Args.getLastArg(OPT_cl_strict_aliasing)
1934       && Opts.OpenCLVersion > 100) {
1935    std::string VerSpec = llvm::to_string(Opts.OpenCLVersion / 100) +
1936                          std::string(".") +
1937                          llvm::to_string((Opts.OpenCLVersion % 100) / 10);
1938    Diags.Report(diag::warn_option_invalid_ocl_version)
1939      << VerSpec << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
1940  }
1941
1942  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1943  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1944  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1945  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1946  // name, as it doesn't seem a useful distinction.
1947  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1948                                  Opts.GNUKeywords);
1949
1950  if (Args.hasArg(OPT_fno_operator_names))
1951    Opts.CXXOperatorNames = 0;
1952
1953  if (Args.hasArg(OPT_fcuda_is_device))
1954    Opts.CUDAIsDevice = 1;
1955
1956  if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
1957    Opts.CUDAAllowVariadicFunctions = 1;
1958
1959  if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
1960    Opts.CUDAHostDeviceConstexpr = 0;
1961
1962  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_flush_denormals_to_zero))
1963    Opts.CUDADeviceFlushDenormalsToZero = 1;
1964
1965  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
1966    Opts.CUDADeviceApproxTranscendentals = 1;
1967
1968  if (Opts.ObjC1) {
1969    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1970      StringRef value = arg->getValue();
1971      if (Opts.ObjCRuntime.tryParse(value))
1972        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1973    }
1974
1975    if (Args.hasArg(OPT_fobjc_gc_only))
1976      Opts.setGC(LangOptions::GCOnly);
1977    else if (Args.hasArg(OPT_fobjc_gc))
1978      Opts.setGC(LangOptions::HybridGC);
1979    else if (Args.hasArg(OPT_fobjc_arc)) {
1980      Opts.ObjCAutoRefCount = 1;
1981      if (!Opts.ObjCRuntime.allowsARC())
1982        Diags.Report(diag::err_arc_unsupported_on_runtime);
1983    }
1984
1985    // ObjCWeakRuntime tracks whether the runtime supports __weak, not
1986    // whether the feature is actually enabled.  This is predominantly
1987    // determined by -fobjc-runtime, but we allow it to be overridden
1988    // from the command line for testing purposes.
1989    if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1990      Opts.ObjCWeakRuntime = 1;
1991    else
1992      Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
1993
1994    // ObjCWeak determines whether __weak is actually enabled.
1995    // Note that we allow -fno-objc-weak to disable this even in ARC mode.
1996    if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
1997      if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
1998        assert(!Opts.ObjCWeak);
1999      } else if (Opts.getGC() != LangOptions::NonGC) {
2000        Diags.Report(diag::err_objc_weak_with_gc);
2001      } else if (!Opts.ObjCWeakRuntime) {
2002        Diags.Report(diag::err_objc_weak_unsupported);
2003      } else {
2004        Opts.ObjCWeak = 1;
2005      }
2006    } else if (Opts.ObjCAutoRefCount) {
2007      Opts.ObjCWeak = Opts.ObjCWeakRuntime;
2008    }
2009
2010    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
2011      Opts.ObjCInferRelatedResultType = 0;
2012
2013    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
2014      Opts.ObjCSubscriptingLegacyRuntime =
2015        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
2016  }
2017
2018  if (Args.hasArg(OPT_fgnu89_inline)) {
2019    if (Opts.CPlusPlus)
2020      Diags.Report(diag::err_drv_argument_not_allowed_with)
2021        << "-fgnu89-inline" << GetInputKindName(IK);
2022    else
2023      Opts.GNUInline = 1;
2024  }
2025
2026  if (Args.hasArg(OPT_fapple_kext)) {
2027    if (!Opts.CPlusPlus)
2028      Diags.Report(diag::warn_c_kext);
2029    else
2030      Opts.AppleKext = 1;
2031  }
2032
2033  if (Args.hasArg(OPT_print_ivar_layout))
2034    Opts.ObjCGCBitmapPrint = 1;
2035  if (Args.hasArg(OPT_fno_constant_cfstrings))
2036    Opts.NoConstantCFStrings = 1;
2037
2038  if (Args.hasArg(OPT_fzvector))
2039    Opts.ZVector = 1;
2040
2041  if (Args.hasArg(OPT_pthread))
2042    Opts.POSIXThreads = 1;
2043
2044  // The value-visibility mode defaults to "default".
2045  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
2046    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
2047  } else {
2048    Opts.setValueVisibilityMode(DefaultVisibility);
2049  }
2050
2051  // The type-visibility mode defaults to the value-visibility mode.
2052  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
2053    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
2054  } else {
2055    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
2056  }
2057
2058  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2059    Opts.InlineVisibilityHidden = 1;
2060
2061  if (Args.hasArg(OPT_ftrapv)) {
2062    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2063    // Set the handler, if one is specified.
2064    Opts.OverflowHandler =
2065        Args.getLastArgValue(OPT_ftrapv_handler);
2066  }
2067  else if (Args.hasArg(OPT_fwrapv))
2068    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2069
2070  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
2071  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
2072  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
2073  Opts.MSCompatibilityVersion = 0;
2074  if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
2075    VersionTuple VT;
2076    if (VT.tryParse(A->getValue()))
2077      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2078                                                << A->getValue();
2079    Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
2080                                  VT.getMinor().getValueOr(0) * 100000 +
2081                                  VT.getSubminor().getValueOr(0);
2082  }
2083
2084  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
2085  // is specified, or -std is set to a conforming mode.
2086  // Trigraphs are disabled by default in c++1z onwards.
2087  Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
2088  Opts.Trigraphs =
2089      Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
2090
2091  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2092                                   OPT_fno_dollars_in_identifiers,
2093                                   Opts.DollarIdents);
2094  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2095  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
2096  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2097  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2098  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2099                                   Opts.ConstStrings);
2100  if (Args.hasArg(OPT_fno_lax_vector_conversions))
2101    Opts.LaxVectorConversions = 0;
2102  if (Args.hasArg(OPT_fno_threadsafe_statics))
2103    Opts.ThreadsafeStatics = 0;
2104  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2105  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2106  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2107  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2108  Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
2109  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2110
2111  Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
2112  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
2113  Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
2114    && Opts.OpenCLVersion >= 200);
2115  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2116  Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
2117  Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
2118  Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
2119  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
2120  Opts.ModulesDeclUse =
2121      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
2122  Opts.ModulesLocalVisibility =
2123      Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
2124  Opts.ModulesCodegen = Args.hasArg(OPT_fmodules_codegen);
2125  Opts.ModulesDebugInfo = Args.hasArg(OPT_fmodules_debuginfo);
2126  Opts.ModulesSearchAll = Opts.Modules &&
2127    !Args.hasArg(OPT_fno_modules_search_all) &&
2128    Args.hasArg(OPT_fmodules_search_all);
2129  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
2130  Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
2131  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
2132  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2133  Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
2134  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2135  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2136  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2137  if (!Opts.NoBuiltin)
2138    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
2139  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
2140  Opts.RelaxedTemplateTemplateArgs =
2141      Args.hasArg(OPT_frelaxed_template_template_args);
2142  Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
2143  Opts.AlignedAllocation =
2144      Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
2145                   Opts.AlignedAllocation);
2146  Opts.AlignedAllocationUnavailable =
2147      Opts.AlignedAllocation && Args.hasArg(OPT_aligned_alloc_unavailable);
2148  Opts.NewAlignOverride =
2149      getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
2150  if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
2151    Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
2152    Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
2153                                                 << A->getValue();
2154    Opts.NewAlignOverride = 0;
2155  }
2156  Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
2157  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2158  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2159  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2160  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
2161  Opts.InstantiationDepth =
2162      getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
2163  Opts.ArrowDepth =
2164      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
2165  Opts.ConstexprCallDepth =
2166      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
2167  Opts.ConstexprStepLimit =
2168      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
2169  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
2170  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2171  Opts.NumLargeByValueCopy =
2172      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
2173  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2174  Opts.ObjCConstantStringClass =
2175    Args.getLastArgValue(OPT_fconstant_string_class);
2176  Opts.ObjCDefaultSynthProperties =
2177    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
2178  Opts.EncodeExtendedBlockSig =
2179    Args.hasArg(OPT_fencode_extended_block_signature);
2180  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2181  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
2182  Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
2183  Opts.AlignDouble = Args.hasArg(OPT_malign_double);
2184  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2185  Opts.PIE = Args.hasArg(OPT_pic_is_pie);
2186  Opts.Static = Args.hasArg(OPT_static_define);
2187  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2188  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2189                        || Args.hasArg(OPT_fdump_record_layouts);
2190  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2191  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2192  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2193  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2194  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2195  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2196  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2197  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2198  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2199  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2200  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2201  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2202  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name_EQ);
2203  Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
2204  Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
2205  std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
2206  Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
2207  Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
2208  // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
2209  // is enabled.
2210  Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
2211                            | Opts.NativeHalfArgsAndReturns;
2212  Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
2213
2214  // __declspec is enabled by default for the PS4 by the driver, and also
2215  // enabled for Microsoft Extensions or Borland Extensions, here.
2216  //
2217  // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
2218  // CUDA extension. However, it is required for supporting
2219  // __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
2220  // been rewritten in terms of something more generic, remove the Opts.CUDA
2221  // term here.
2222  Opts.DeclSpecKeyword =
2223      Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
2224                   (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
2225
2226  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
2227    switch (llvm::StringSwitch<unsigned>(A->getValue())
2228      .Case("target", LangOptions::ASMM_Target)
2229      .Case("no", LangOptions::ASMM_Off)
2230      .Case("yes", LangOptions::ASMM_On)
2231      .Default(255)) {
2232    default:
2233      Diags.Report(diag::err_drv_invalid_value)
2234        << "-faddress-space-map-mangling=" << A->getValue();
2235      break;
2236    case LangOptions::ASMM_Target:
2237      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
2238      break;
2239    case LangOptions::ASMM_On:
2240      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
2241      break;
2242    case LangOptions::ASMM_Off:
2243      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
2244      break;
2245    }
2246  }
2247
2248  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
2249    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
2250        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
2251            A->getValue())
2252            .Case("single",
2253                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
2254            .Case("multiple",
2255                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2256            .Case("virtual",
2257                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2258            .Default(LangOptions::PPTMK_BestCase);
2259    if (InheritanceModel == LangOptions::PPTMK_BestCase)
2260      Diags.Report(diag::err_drv_invalid_value)
2261          << "-fms-memptr-rep=" << A->getValue();
2262
2263    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2264  }
2265
2266  // Check for MS default calling conventions being specified.
2267  if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2268    LangOptions::DefaultCallingConvention DefaultCC =
2269        llvm::StringSwitch<LangOptions::DefaultCallingConvention>(
2270            A->getValue())
2271            .Case("cdecl", LangOptions::DCC_CDecl)
2272            .Case("fastcall", LangOptions::DCC_FastCall)
2273            .Case("stdcall", LangOptions::DCC_StdCall)
2274            .Case("vectorcall", LangOptions::DCC_VectorCall)
2275            .Default(LangOptions::DCC_None);
2276    if (DefaultCC == LangOptions::DCC_None)
2277      Diags.Report(diag::err_drv_invalid_value)
2278          << "-fdefault-calling-conv=" << A->getValue();
2279
2280    llvm::Triple T(TargetOpts.Triple);
2281    llvm::Triple::ArchType Arch = T.getArch();
2282    bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2283                      DefaultCC == LangOptions::DCC_StdCall) &&
2284                     Arch != llvm::Triple::x86;
2285    emitError |= DefaultCC == LangOptions::DCC_VectorCall &&
2286                 !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2287    if (emitError)
2288      Diags.Report(diag::err_drv_argument_not_allowed_with)
2289          << A->getSpelling() << T.getTriple();
2290    else
2291      Opts.setDefaultCallingConv(DefaultCC);
2292  }
2293
2294  // -mrtd option
2295  if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2296    if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2297      Diags.Report(diag::err_drv_argument_not_allowed_with)
2298          << A->getSpelling() << "-fdefault-calling-conv";
2299    else {
2300      llvm::Triple T(TargetOpts.Triple);
2301      if (T.getArch() != llvm::Triple::x86)
2302        Diags.Report(diag::err_drv_argument_not_allowed_with)
2303            << A->getSpelling() << T.getTriple();
2304      else
2305        Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2306    }
2307  }
2308
2309  // Check if -fopenmp is specified.
2310  Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2311  Opts.OpenMPUseTLS =
2312      Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2313  Opts.OpenMPIsDevice =
2314      Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2315
2316  if (Opts.OpenMP) {
2317    int Version =
2318        getLastArgIntValue(Args, OPT_fopenmp_version_EQ, Opts.OpenMP, Diags);
2319    if (Version != 0)
2320      Opts.OpenMP = Version;
2321    // Provide diagnostic when a given target is not expected to be an OpenMP
2322    // device or host.
2323    if (!Opts.OpenMPIsDevice) {
2324      switch (T.getArch()) {
2325      default:
2326        break;
2327      // Add unsupported host targets here:
2328      case llvm::Triple::nvptx:
2329      case llvm::Triple::nvptx64:
2330        Diags.Report(clang::diag::err_drv_omp_host_target_not_supported)
2331            << TargetOpts.Triple;
2332        break;
2333      }
2334    }
2335  }
2336
2337  // Get the OpenMP target triples if any.
2338  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2339
2340    for (unsigned i = 0; i < A->getNumValues(); ++i) {
2341      llvm::Triple TT(A->getValue(i));
2342
2343      if (TT.getArch() == llvm::Triple::UnknownArch)
2344        Diags.Report(clang::diag::err_drv_invalid_omp_target) << A->getValue(i);
2345      else
2346        Opts.OMPTargetTriples.push_back(TT);
2347    }
2348  }
2349
2350  // Get OpenMP host file path if any and report if a non existent file is
2351  // found
2352  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2353    Opts.OMPHostIRFile = A->getValue();
2354    if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2355      Diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
2356          << Opts.OMPHostIRFile;
2357  }
2358
2359  // Record whether the __DEPRECATED define was requested.
2360  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2361                                 OPT_fno_deprecated_macro,
2362                                 Opts.Deprecated);
2363
2364  // FIXME: Eliminate this dependency.
2365  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2366       OptSize = getOptimizationLevelSize(Args);
2367  Opts.Optimize = Opt != 0;
2368  Opts.OptimizeSize = OptSize != 0;
2369
2370  // This is the __NO_INLINE__ define, which just depends on things like the
2371  // optimization level and -fno-inline, not actually whether the backend has
2372  // inlining enabled.
2373  Opts.NoInlineDefine = !Opts.Optimize;
2374  if (Arg *InlineArg = Args.getLastArg(
2375          options::OPT_finline_functions, options::OPT_finline_hint_functions,
2376          options::OPT_fno_inline_functions, options::OPT_fno_inline))
2377    if (InlineArg->getOption().matches(options::OPT_fno_inline))
2378      Opts.NoInlineDefine = true;
2379
2380  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2381      Args.hasArg(OPT_cl_fast_relaxed_math);
2382  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2383      Args.hasArg(OPT_cl_finite_math_only) ||
2384      Args.hasArg(OPT_cl_fast_relaxed_math);
2385  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2386                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2387                      Args.hasArg(OPT_cl_fast_relaxed_math);
2388
2389  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2390    StringRef Val = A->getValue();
2391    if (Val == "fast")
2392      Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
2393    else if (Val == "on")
2394      Opts.setDefaultFPContractMode(LangOptions::FPC_On);
2395    else if (Val == "off")
2396      Opts.setDefaultFPContractMode(LangOptions::FPC_Off);
2397    else
2398      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2399  }
2400
2401  Opts.RetainCommentsFromSystemHeaders =
2402      Args.hasArg(OPT_fretain_comments_from_system_headers);
2403
2404  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2405  switch (SSP) {
2406  default:
2407    Diags.Report(diag::err_drv_invalid_value)
2408      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2409    break;
2410  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2411  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2412  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2413  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2414  }
2415
2416  // Parse -fsanitize= arguments.
2417  parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2418                      Diags, Opts.Sanitize);
2419  // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2420  Opts.SanitizeAddressFieldPadding =
2421      getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2422  Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2423
2424  // -fxray-instrument
2425  Opts.XRayInstrument =
2426      Args.hasFlag(OPT_fxray_instrument, OPT_fnoxray_instrument, false);
2427
2428  // -fxray-{always,never}-instrument= filenames.
2429  Opts.XRayAlwaysInstrumentFiles =
2430      Args.getAllArgValues(OPT_fxray_always_instrument);
2431  Opts.XRayNeverInstrumentFiles =
2432      Args.getAllArgValues(OPT_fxray_never_instrument);
2433
2434  // -fallow-editor-placeholders
2435  Opts.AllowEditorPlaceholders = Args.hasArg(OPT_fallow_editor_placeholders);
2436}
2437
2438static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
2439  switch (Action) {
2440  case frontend::ASTDeclList:
2441  case frontend::ASTDump:
2442  case frontend::ASTPrint:
2443  case frontend::ASTView:
2444  case frontend::EmitAssembly:
2445  case frontend::EmitBC:
2446  case frontend::EmitHTML:
2447  case frontend::EmitLLVM:
2448  case frontend::EmitLLVMOnly:
2449  case frontend::EmitCodeGenOnly:
2450  case frontend::EmitObj:
2451  case frontend::FixIt:
2452  case frontend::GenerateModule:
2453  case frontend::GenerateModuleInterface:
2454  case frontend::GeneratePCH:
2455  case frontend::GeneratePTH:
2456  case frontend::ParseSyntaxOnly:
2457  case frontend::ModuleFileInfo:
2458  case frontend::VerifyPCH:
2459  case frontend::PluginAction:
2460  case frontend::PrintDeclContext:
2461  case frontend::RewriteObjC:
2462  case frontend::RewriteTest:
2463  case frontend::RunAnalysis:
2464  case frontend::MigrateSource:
2465    return false;
2466
2467  case frontend::DumpRawTokens:
2468  case frontend::DumpTokens:
2469  case frontend::InitOnly:
2470  case frontend::PrintPreamble:
2471  case frontend::PrintPreprocessedInput:
2472  case frontend::RewriteMacros:
2473  case frontend::RunPreprocessorOnly:
2474    return true;
2475  }
2476  llvm_unreachable("invalid frontend action");
2477}
2478
2479static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2480                                  FileManager &FileMgr,
2481                                  DiagnosticsEngine &Diags,
2482                                  frontend::ActionKind Action) {
2483  using namespace options;
2484  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2485  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2486  if (const Arg *A = Args.getLastArg(OPT_token_cache))
2487      Opts.TokenCache = A->getValue();
2488  else
2489    Opts.TokenCache = Opts.ImplicitPTHInclude;
2490  Opts.UsePredefines = !Args.hasArg(OPT_undef);
2491  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2492  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2493  Opts.AllowPCHWithCompilerErrors = Args.hasArg(OPT_fallow_pch_with_errors);
2494
2495  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2496  for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
2497    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
2498
2499  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2500    StringRef Value(A->getValue());
2501    size_t Comma = Value.find(',');
2502    unsigned Bytes = 0;
2503    unsigned EndOfLine = 0;
2504
2505    if (Comma == StringRef::npos ||
2506        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2507        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2508      Diags.Report(diag::err_drv_preamble_format);
2509    else {
2510      Opts.PrecompiledPreambleBytes.first = Bytes;
2511      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2512    }
2513  }
2514
2515  // Add macros from the command line.
2516  for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
2517    if (A->getOption().matches(OPT_D))
2518      Opts.addMacroDef(A->getValue());
2519    else
2520      Opts.addMacroUndef(A->getValue());
2521  }
2522
2523  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2524
2525  // Add the ordered list of -includes.
2526  for (const Arg *A : Args.filtered(OPT_include))
2527    Opts.Includes.emplace_back(A->getValue());
2528
2529  for (const Arg *A : Args.filtered(OPT_chain_include))
2530    Opts.ChainedIncludes.emplace_back(A->getValue());
2531
2532  for (const Arg *A : Args.filtered(OPT_remap_file)) {
2533    std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
2534
2535    if (Split.second.empty()) {
2536      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2537      continue;
2538    }
2539
2540    Opts.addRemappedFile(Split.first, Split.second);
2541  }
2542
2543  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2544    StringRef Name = A->getValue();
2545    unsigned Library = llvm::StringSwitch<unsigned>(Name)
2546      .Case("libc++", ARCXX_libcxx)
2547      .Case("libstdc++", ARCXX_libstdcxx)
2548      .Case("none", ARCXX_nolib)
2549      .Default(~0U);
2550    if (Library == ~0U)
2551      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2552    else
2553      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2554  }
2555
2556  // Always avoid lexing editor placeholders when we're just running the
2557  // preprocessor as we never want to emit the
2558  // "editor placeholder in source file" error in PP only mode.
2559  if (isStrictlyPreprocessorAction(Action))
2560    Opts.LexEditorPlaceholders = false;
2561}
2562
2563static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2564                                        ArgList &Args,
2565                                        frontend::ActionKind Action) {
2566  using namespace options;
2567
2568  if (isStrictlyPreprocessorAction(Action))
2569    Opts.ShowCPP = !Args.hasArg(OPT_dM);
2570  else
2571    Opts.ShowCPP = 0;
2572
2573  Opts.ShowComments = Args.hasArg(OPT_C);
2574  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2575  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2576  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2577  Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
2578  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2579  Opts.RewriteImports = Args.hasArg(OPT_frewrite_imports);
2580  Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
2581}
2582
2583static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
2584                            DiagnosticsEngine &Diags) {
2585  using namespace options;
2586  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2587  if (Arg *A = Args.getLastArg(OPT_meabi)) {
2588    StringRef Value = A->getValue();
2589    llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
2590                                 .Case("default", llvm::EABI::Default)
2591                                 .Case("4", llvm::EABI::EABI4)
2592                                 .Case("5", llvm::EABI::EABI5)
2593                                 .Case("gnu", llvm::EABI::GNU)
2594                                 .Default(llvm::EABI::Unknown);
2595    if (EABIVersion == llvm::EABI::Unknown)
2596      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2597                                                << Value;
2598    else
2599      Opts.EABIVersion = EABIVersion;
2600  }
2601  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2602  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
2603  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2604  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2605  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2606  Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
2607  // Use the default target triple if unspecified.
2608  if (Opts.Triple.empty())
2609    Opts.Triple = llvm::sys::getDefaultTargetTriple();
2610  Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
2611}
2612
2613bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2614                                        const char *const *ArgBegin,
2615                                        const char *const *ArgEnd,
2616                                        DiagnosticsEngine &Diags) {
2617  bool Success = true;
2618
2619  // Parse the arguments.
2620  std::unique_ptr<OptTable> Opts = createDriverOptTable();
2621  const unsigned IncludedFlagsBitmask = options::CC1Option;
2622  unsigned MissingArgIndex, MissingArgCount;
2623  InputArgList Args =
2624      Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
2625                      MissingArgCount, IncludedFlagsBitmask);
2626  LangOptions &LangOpts = *Res.getLangOpts();
2627
2628  // Check for missing argument error.
2629  if (MissingArgCount) {
2630    Diags.Report(diag::err_drv_missing_argument)
2631        << Args.getArgString(MissingArgIndex) << MissingArgCount;
2632    Success = false;
2633  }
2634
2635  // Issue errors on unknown arguments.
2636  for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
2637    Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
2638    Success = false;
2639  }
2640
2641  Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
2642  Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
2643  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
2644  Success &=
2645      ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
2646                          false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
2647  ParseCommentArgs(LangOpts.CommentOpts, Args);
2648  ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
2649  // FIXME: We shouldn't have to pass the DashX option around here
2650  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
2651                                      LangOpts.IsHeaderFile);
2652  ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
2653  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
2654                              Res.getTargetOpts());
2655  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
2656                        Res.getFileSystemOpts().WorkingDir);
2657  if (DashX.getFormat() == InputKind::Precompiled ||
2658      DashX.getLanguage() == InputKind::LLVM_IR) {
2659    // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
2660    // PassManager in BackendUtil.cpp. They need to be initializd no matter
2661    // what the input type is.
2662    if (Args.hasArg(OPT_fobjc_arc))
2663      LangOpts.ObjCAutoRefCount = 1;
2664    // PIClevel and PIELevel are needed during code generation and this should be
2665    // set regardless of the input type.
2666    LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2667    LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
2668    parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2669                        Diags, LangOpts.Sanitize);
2670  } else {
2671    // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
2672    // FIXME: Should we really be calling this for an InputKind::Asm input?
2673    ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
2674                  Res.getPreprocessorOpts(), Diags);
2675    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2676      LangOpts.ObjCExceptions = 1;
2677  }
2678
2679  if (LangOpts.CUDA) {
2680    // During CUDA device-side compilation, the aux triple is the
2681    // triple used for host compilation.
2682    if (LangOpts.CUDAIsDevice)
2683      Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2684  }
2685
2686  // Set the triple of the host for OpenMP device compile.
2687  if (LangOpts.OpenMPIsDevice)
2688    Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2689
2690  // FIXME: Override value name discarding when asan or msan is used because the
2691  // backend passes depend on the name of the alloca in order to print out
2692  // names.
2693  Res.getCodeGenOpts().DiscardValueNames &=
2694      !LangOpts.Sanitize.has(SanitizerKind::Address) &&
2695      !LangOpts.Sanitize.has(SanitizerKind::Memory);
2696
2697  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2698  // PCH file and find the original header name. Remove the need to do that in
2699  // ParsePreprocessorArgs and remove the FileManager
2700  // parameters from the function and the "FileManager.h" #include.
2701  FileManager FileMgr(Res.getFileSystemOpts());
2702  ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags,
2703                        Res.getFrontendOpts().ProgramAction);
2704  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
2705                              Res.getFrontendOpts().ProgramAction);
2706
2707  // Turn on -Wspir-compat for SPIR target.
2708  llvm::Triple T(Res.getTargetOpts().Triple);
2709  auto Arch = T.getArch();
2710  if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
2711    Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
2712  }
2713  return Success;
2714}
2715
2716std::string CompilerInvocation::getModuleHash() const {
2717  // Note: For QoI reasons, the things we use as a hash here should all be
2718  // dumped via the -module-info flag.
2719  using llvm::hash_code;
2720  using llvm::hash_value;
2721  using llvm::hash_combine;
2722
2723  // Start the signature with the compiler version.
2724  // FIXME: We'd rather use something more cryptographically sound than
2725  // CityHash, but this will do for now.
2726  hash_code code = hash_value(getClangFullRepositoryVersion());
2727
2728  // Extend the signature with the language options
2729#define LANGOPT(Name, Bits, Default, Description) \
2730   code = hash_combine(code, LangOpts->Name);
2731#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2732  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
2733#define BENIGN_LANGOPT(Name, Bits, Default, Description)
2734#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2735#include "clang/Basic/LangOptions.def"
2736
2737  for (StringRef Feature : LangOpts->ModuleFeatures)
2738    code = hash_combine(code, Feature);
2739
2740  // Extend the signature with the target options.
2741  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
2742                      TargetOpts->ABI);
2743  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
2744    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
2745
2746  // Extend the signature with preprocessor options.
2747  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
2748  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
2749  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
2750
2751  for (std::vector<std::pair<std::string, bool/*isUndef*/>>::const_iterator
2752            I = getPreprocessorOpts().Macros.begin(),
2753         IEnd = getPreprocessorOpts().Macros.end();
2754       I != IEnd; ++I) {
2755    // If we're supposed to ignore this macro for the purposes of modules,
2756    // don't put it into the hash.
2757    if (!hsOpts.ModulesIgnoreMacros.empty()) {
2758      // Check whether we're ignoring this macro.
2759      StringRef MacroDef = I->first;
2760      if (hsOpts.ModulesIgnoreMacros.count(
2761              llvm::CachedHashString(MacroDef.split('=').first)))
2762        continue;
2763    }
2764
2765    code = hash_combine(code, I->first, I->second);
2766  }
2767
2768  // Extend the signature with the sysroot and other header search options.
2769  code = hash_combine(code, hsOpts.Sysroot,
2770                      hsOpts.ModuleFormat,
2771                      hsOpts.UseDebugInfo,
2772                      hsOpts.UseBuiltinIncludes,
2773                      hsOpts.UseStandardSystemIncludes,
2774                      hsOpts.UseStandardCXXIncludes,
2775                      hsOpts.UseLibcxx,
2776                      hsOpts.ModulesValidateDiagnosticOptions);
2777  code = hash_combine(code, hsOpts.ResourceDir);
2778
2779  // Extend the signature with the user build path.
2780  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2781
2782  // Extend the signature with the module file extensions.
2783  const FrontendOptions &frontendOpts = getFrontendOpts();
2784  for (const auto &ext : frontendOpts.ModuleFileExtensions) {
2785    code = ext->hashExtension(code);
2786  }
2787
2788  // Extend the signature with the enabled sanitizers, if at least one is
2789  // enabled. Sanitizers which cannot affect AST generation aren't hashed.
2790  SanitizerSet SanHash = LangOpts->Sanitize;
2791  SanHash.clear(getPPTransparentSanitizers());
2792  if (!SanHash.empty())
2793    code = hash_combine(code, SanHash.Mask);
2794
2795  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2796}
2797
2798namespace clang {
2799
2800template<typename IntTy>
2801static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2802                                    IntTy Default,
2803                                    DiagnosticsEngine *Diags) {
2804  IntTy Res = Default;
2805  if (Arg *A = Args.getLastArg(Id)) {
2806    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2807      if (Diags)
2808        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2809                                                       << A->getValue();
2810    }
2811  }
2812  return Res;
2813}
2814
2815
2816// Declared in clang/Frontend/Utils.h.
2817int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2818                       DiagnosticsEngine *Diags) {
2819  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2820}
2821
2822uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2823                               uint64_t Default,
2824                               DiagnosticsEngine *Diags) {
2825  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2826}
2827
2828void BuryPointer(const void *Ptr) {
2829  // This function may be called only a small fixed amount of times per each
2830  // invocation, otherwise we do actually have a leak which we want to report.
2831  // If this function is called more than kGraveYardMaxSize times, the pointers
2832  // will not be properly buried and a leak detector will report a leak, which
2833  // is what we want in such case.
2834  static const size_t kGraveYardMaxSize = 16;
2835  LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2836  static std::atomic<unsigned> GraveYardSize;
2837  unsigned Idx = GraveYardSize++;
2838  if (Idx >= kGraveYardMaxSize)
2839    return;
2840  GraveYard[Idx] = Ptr;
2841}
2842
2843IntrusiveRefCntPtr<vfs::FileSystem>
2844createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2845                                DiagnosticsEngine &Diags) {
2846  return createVFSFromCompilerInvocation(CI, Diags, vfs::getRealFileSystem());
2847}
2848
2849IntrusiveRefCntPtr<vfs::FileSystem>
2850createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2851                                DiagnosticsEngine &Diags,
2852                                IntrusiveRefCntPtr<vfs::FileSystem> BaseFS) {
2853  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2854    return BaseFS;
2855
2856  IntrusiveRefCntPtr<vfs::OverlayFileSystem> Overlay(
2857      new vfs::OverlayFileSystem(BaseFS));
2858  // earlier vfs files are on the bottom
2859  for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2860    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2861        BaseFS->getBufferForFile(File);
2862    if (!Buffer) {
2863      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2864      return IntrusiveRefCntPtr<vfs::FileSystem>();
2865    }
2866
2867    IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getVFSFromYAML(
2868        std::move(Buffer.get()), /*DiagHandler*/ nullptr, File);
2869    if (!FS.get()) {
2870      Diags.Report(diag::err_invalid_vfs_overlay) << File;
2871      return IntrusiveRefCntPtr<vfs::FileSystem>();
2872    }
2873    Overlay->pushOverlay(FS);
2874  }
2875  return Overlay;
2876}
2877} // end namespace clang
2878