CompilerInvocation.cpp revision 321369 
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  Opts.CoverageMapping =
577      Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
578  Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
579  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
580  Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
581  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
582  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
583  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
584  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
585  Opts.CodeModel = getCodeModel(Args, Diags);
586  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
587  Opts.DisableFPElim =
588      (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
589  Opts.DisableFree = Args.hasArg(OPT_disable_free);
590  Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
591  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
592  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
593  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable) ||
594                          Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
595                          Args.hasArg(OPT_cl_fast_relaxed_math);
596  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
597  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
598                       Args.hasArg(OPT_cl_finite_math_only) ||
599                       Args.hasArg(OPT_cl_fast_relaxed_math));
600  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
601                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
602                       Args.hasArg(OPT_cl_finite_math_only) ||
603                       Args.hasArg(OPT_cl_fast_relaxed_math));
604  Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
605                        Args.hasArg(OPT_cl_no_signed_zeros) ||
606                        Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
607                        Args.hasArg(OPT_cl_fast_relaxed_math));
608  Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero);
609  Opts.CorrectlyRoundedDivSqrt =
610      Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
611  Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
612  Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
613  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
614  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
615  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
616  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
617  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
618  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
619  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
620  Opts.IncrementalLinkerCompatible =
621      Args.hasArg(OPT_mincremental_linker_compatible);
622  Opts.PIECopyRelocations =
623      Args.hasArg(OPT_mpie_copy_relocations);
624  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
625  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
626  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
627  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
628  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
629  Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
630  Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
631  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
632                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
633                      Args.hasArg(OPT_cl_fast_relaxed_math);
634  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
635  Opts.RelocationModel = getRelocModel(Args, Diags);
636  Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
637  if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
638    Diags.Report(diag::err_drv_invalid_value)
639        << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
640        << Opts.ThreadModel;
641  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
642  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
643
644  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
645                                       OPT_fno_function_sections, false);
646  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
647                                   OPT_fno_data_sections, false);
648  Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
649                                         OPT_fno_unique_section_names, true);
650
651  Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
652
653  Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
654
655  Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
656  Opts.EmitSummaryIndex = false;
657  if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
658    StringRef S = A->getValue();
659    if (S == "thin")
660      Opts.EmitSummaryIndex = true;
661    else if (S != "full")
662      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
663  }
664  Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
665  if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
666    if (IK.getLanguage() != InputKind::LLVM_IR)
667      Diags.Report(diag::err_drv_argument_only_allowed_with)
668          << A->getAsString(Args) << "-x ir";
669    Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
670  }
671  Opts.ThinLinkBitcodeFile = Args.getLastArgValue(OPT_fthin_link_bitcode_EQ);
672
673  Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
674
675  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
676  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
677
678  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
679  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
680
681  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
682  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
683  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
684  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
685    Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
686    Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
687    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
688    Opts.CoverageNoFunctionNamesInData =
689        Args.hasArg(OPT_coverage_no_function_names_in_data);
690    Opts.CoverageExitBlockBeforeBody =
691        Args.hasArg(OPT_coverage_exit_block_before_body);
692    if (Args.hasArg(OPT_coverage_version_EQ)) {
693      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
694      if (CoverageVersion.size() != 4) {
695        Diags.Report(diag::err_drv_invalid_value)
696            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
697            << CoverageVersion;
698      } else {
699        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
700      }
701    }
702  }
703	// Handle -fembed-bitcode option.
704  if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
705    StringRef Name = A->getValue();
706    unsigned Model = llvm::StringSwitch<unsigned>(Name)
707        .Case("off", CodeGenOptions::Embed_Off)
708        .Case("all", CodeGenOptions::Embed_All)
709        .Case("bitcode", CodeGenOptions::Embed_Bitcode)
710        .Case("marker", CodeGenOptions::Embed_Marker)
711        .Default(~0U);
712    if (Model == ~0U) {
713      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
714      Success = false;
715    } else
716      Opts.setEmbedBitcode(
717          static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
718  }
719  // FIXME: For backend options that are not yet recorded as function
720  // attributes in the IR, keep track of them so we can embed them in a
721  // separate data section and use them when building the bitcode.
722  if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
723    for (const auto &A : Args) {
724      // Do not encode output and input.
725      if (A->getOption().getID() == options::OPT_o ||
726          A->getOption().getID() == options::OPT_INPUT ||
727          A->getOption().getID() == options::OPT_x ||
728          A->getOption().getID() == options::OPT_fembed_bitcode ||
729          (A->getOption().getGroup().isValid() &&
730           A->getOption().getGroup().getID() == options::OPT_W_Group))
731        continue;
732      ArgStringList ASL;
733      A->render(Args, ASL);
734      for (const auto &arg : ASL) {
735        StringRef ArgStr(arg);
736        Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
737        // using \00 to seperate each commandline options.
738        Opts.CmdArgs.push_back('\0');
739      }
740    }
741  }
742
743  Opts.PreserveVec3Type = Args.hasArg(OPT_fpreserve_vec3_type);
744  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
745  Opts.XRayInstrumentFunctions = Args.hasArg(OPT_fxray_instrument);
746  Opts.XRayInstructionThreshold =
747      getLastArgIntValue(Args, OPT_fxray_instruction_threshold_EQ, 200, Diags);
748  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
749  Opts.CallFEntry = Args.hasArg(OPT_mfentry);
750  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
751
752  if (const Arg *A = Args.getLastArg(OPT_compress_debug_sections,
753                                     OPT_compress_debug_sections_EQ)) {
754    if (A->getOption().getID() == OPT_compress_debug_sections) {
755      // TODO: be more clever about the compression type auto-detection
756      Opts.setCompressDebugSections(llvm::DebugCompressionType::GNU);
757    } else {
758      auto DCT = llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
759                     .Case("none", llvm::DebugCompressionType::None)
760                     .Case("zlib", llvm::DebugCompressionType::Z)
761                     .Case("zlib-gnu", llvm::DebugCompressionType::GNU)
762                     .Default(llvm::DebugCompressionType::None);
763      Opts.setCompressDebugSections(DCT);
764    }
765  }
766
767  Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
768  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
769  for (auto A : Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_cuda_bitcode)) {
770    CodeGenOptions::BitcodeFileToLink F;
771    F.Filename = A->getValue();
772    if (A->getOption().matches(OPT_mlink_cuda_bitcode)) {
773      F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
774      // When linking CUDA bitcode, propagate function attributes so that
775      // e.g. libdevice gets fast-math attrs if we're building with fast-math.
776      F.PropagateAttrs = true;
777      F.Internalize = true;
778    }
779    Opts.LinkBitcodeFiles.push_back(F);
780  }
781  Opts.SanitizeCoverageType =
782      getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
783  Opts.SanitizeCoverageIndirectCalls =
784      Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
785  Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
786  Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
787  Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
788  Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
789  Opts.SanitizeCoverage8bitCounters =
790      Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
791  Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
792  Opts.SanitizeCoverageTracePCGuard =
793      Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
794  Opts.SanitizeCoverageNoPrune = Args.hasArg(OPT_fsanitize_coverage_no_prune);
795  Opts.SanitizeCoverageInline8bitCounters =
796      Args.hasArg(OPT_fsanitize_coverage_inline_8bit_counters);
797  Opts.SanitizeMemoryTrackOrigins =
798      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
799  Opts.SanitizeMemoryUseAfterDtor =
800      Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
801  Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
802  Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
803  if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
804                               OPT_fno_sanitize_address_use_after_scope)) {
805    Opts.SanitizeAddressUseAfterScope =
806        A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
807  }
808  Opts.SanitizeAddressGlobalsDeadStripping =
809      Args.hasArg(OPT_fsanitize_address_globals_dead_stripping);
810  Opts.SSPBufferSize =
811      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
812  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
813  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
814    StringRef Val = A->getValue();
815    unsigned StackAlignment = Opts.StackAlignment;
816    Val.getAsInteger(10, StackAlignment);
817    Opts.StackAlignment = StackAlignment;
818  }
819
820  if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
821    StringRef Val = A->getValue();
822    unsigned StackProbeSize = Opts.StackProbeSize;
823    Val.getAsInteger(0, StackProbeSize);
824    Opts.StackProbeSize = StackProbeSize;
825  }
826
827  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
828    StringRef Name = A->getValue();
829    unsigned Method = llvm::StringSwitch<unsigned>(Name)
830      .Case("legacy", CodeGenOptions::Legacy)
831      .Case("non-legacy", CodeGenOptions::NonLegacy)
832      .Case("mixed", CodeGenOptions::Mixed)
833      .Default(~0U);
834    if (Method == ~0U) {
835      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
836      Success = false;
837    } else {
838      Opts.setObjCDispatchMethod(
839        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
840    }
841  }
842
843  Opts.EmulatedTLS =
844      Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
845
846  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
847    StringRef Name = A->getValue();
848    unsigned Model = llvm::StringSwitch<unsigned>(Name)
849        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
850        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
851        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
852        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
853        .Default(~0U);
854    if (Model == ~0U) {
855      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
856      Success = false;
857    } else {
858      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
859    }
860  }
861
862  if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
863    StringRef Val = A->getValue();
864    if (Val == "ieee")
865      Opts.FPDenormalMode = "ieee";
866    else if (Val == "preserve-sign")
867      Opts.FPDenormalMode = "preserve-sign";
868    else if (Val == "positive-zero")
869      Opts.FPDenormalMode = "positive-zero";
870    else
871      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
872  }
873
874  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
875    if (A->getOption().matches(OPT_fpcc_struct_return)) {
876      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
877    } else {
878      assert(A->getOption().matches(OPT_freg_struct_return));
879      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
880    }
881  }
882
883  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
884  Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
885  bool NeedLocTracking = false;
886
887  Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
888  if (!Opts.OptRecordFile.empty())
889    NeedLocTracking = true;
890
891  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
892    Opts.OptimizationRemarkPattern =
893        GenerateOptimizationRemarkRegex(Diags, Args, A);
894    NeedLocTracking = true;
895  }
896
897  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
898    Opts.OptimizationRemarkMissedPattern =
899        GenerateOptimizationRemarkRegex(Diags, Args, A);
900    NeedLocTracking = true;
901  }
902
903  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
904    Opts.OptimizationRemarkAnalysisPattern =
905        GenerateOptimizationRemarkRegex(Diags, Args, A);
906    NeedLocTracking = true;
907  }
908
909  Opts.DiagnosticsWithHotness =
910      Args.hasArg(options::OPT_fdiagnostics_show_hotness);
911  bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
912  bool UsingProfile = UsingSampleProfile ||
913      (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
914
915  if (Opts.DiagnosticsWithHotness && !UsingProfile)
916    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
917        << "-fdiagnostics-show-hotness";
918
919  Opts.DiagnosticsHotnessThreshold = getLastArgUInt64Value(
920      Args, options::OPT_fdiagnostics_hotness_threshold_EQ, 0);
921  if (Opts.DiagnosticsHotnessThreshold > 0 && !UsingProfile)
922    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
923        << "-fdiagnostics-hotness-threshold=";
924
925  // If the user requested to use a sample profile for PGO, then the
926  // backend will need to track source location information so the profile
927  // can be incorporated into the IR.
928  if (UsingSampleProfile)
929    NeedLocTracking = true;
930
931  // If the user requested a flag that requires source locations available in
932  // the backend, make sure that the backend tracks source location information.
933  if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
934    Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
935
936  Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
937
938  // Parse -fsanitize-recover= arguments.
939  // FIXME: Report unrecoverable sanitizers incorrectly specified here.
940  parseSanitizerKinds("-fsanitize-recover=",
941                      Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
942                      Opts.SanitizeRecover);
943  parseSanitizerKinds("-fsanitize-trap=",
944                      Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
945                      Opts.SanitizeTrap);
946
947  Opts.CudaGpuBinaryFileNames =
948      Args.getAllArgValues(OPT_fcuda_include_gpubinary);
949
950  Opts.Backchain = Args.hasArg(OPT_mbackchain);
951
952  Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
953      Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
954
955  return Success;
956}
957
958static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
959                                      ArgList &Args) {
960  using namespace options;
961  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
962  Opts.Targets = Args.getAllArgValues(OPT_MT);
963  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
964  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
965  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
966  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
967  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
968  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
969  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
970  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
971  Opts.ModuleDependencyOutputDir =
972      Args.getLastArgValue(OPT_module_dependency_dir);
973  if (Args.hasArg(OPT_MV))
974    Opts.OutputFormat = DependencyOutputFormat::NMake;
975  // Add sanitizer blacklists as extra dependencies.
976  // They won't be discovered by the regular preprocessor, so
977  // we let make / ninja to know about this implicit dependency.
978  Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
979  auto ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
980  Opts.ExtraDeps.insert(Opts.ExtraDeps.end(), ModuleFiles.begin(),
981                        ModuleFiles.end());
982}
983
984static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
985  // Color diagnostics default to auto ("on" if terminal supports) in the driver
986  // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
987  // Support both clang's -f[no-]color-diagnostics and gcc's
988  // -f[no-]diagnostics-colors[=never|always|auto].
989  enum {
990    Colors_On,
991    Colors_Off,
992    Colors_Auto
993  } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
994  for (Arg *A : Args) {
995    const Option &O = A->getOption();
996    if (O.matches(options::OPT_fcolor_diagnostics) ||
997        O.matches(options::OPT_fdiagnostics_color)) {
998      ShowColors = Colors_On;
999    } else if (O.matches(options::OPT_fno_color_diagnostics) ||
1000               O.matches(options::OPT_fno_diagnostics_color)) {
1001      ShowColors = Colors_Off;
1002    } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
1003      StringRef Value(A->getValue());
1004      if (Value == "always")
1005        ShowColors = Colors_On;
1006      else if (Value == "never")
1007        ShowColors = Colors_Off;
1008      else if (Value == "auto")
1009        ShowColors = Colors_Auto;
1010    }
1011  }
1012  return ShowColors == Colors_On ||
1013         (ShowColors == Colors_Auto &&
1014          llvm::sys::Process::StandardErrHasColors());
1015}
1016
1017bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1018                                DiagnosticsEngine *Diags,
1019                                bool DefaultDiagColor, bool DefaultShowOpt) {
1020  using namespace options;
1021  bool Success = true;
1022
1023  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1024  if (Arg *A =
1025          Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
1026    Opts.DiagnosticSerializationFile = A->getValue();
1027  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1028  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1029  Opts.Pedantic = Args.hasArg(OPT_pedantic);
1030  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1031  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1032  Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
1033  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1034                                 OPT_fno_show_column,
1035                                 /*Default=*/true);
1036  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1037  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1038  Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
1039  Opts.ShowOptionNames =
1040      Args.hasFlag(OPT_fdiagnostics_show_option,
1041                   OPT_fno_diagnostics_show_option, DefaultShowOpt);
1042
1043  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
1044
1045  // Default behavior is to not to show note include stacks.
1046  Opts.ShowNoteIncludeStack = false;
1047  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1048                               OPT_fno_diagnostics_show_note_include_stack))
1049    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1050      Opts.ShowNoteIncludeStack = true;
1051
1052  StringRef ShowOverloads =
1053    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1054  if (ShowOverloads == "best")
1055    Opts.setShowOverloads(Ovl_Best);
1056  else if (ShowOverloads == "all")
1057    Opts.setShowOverloads(Ovl_All);
1058  else {
1059    Success = false;
1060    if (Diags)
1061      Diags->Report(diag::err_drv_invalid_value)
1062      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1063      << ShowOverloads;
1064  }
1065
1066  StringRef ShowCategory =
1067    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1068  if (ShowCategory == "none")
1069    Opts.ShowCategories = 0;
1070  else if (ShowCategory == "id")
1071    Opts.ShowCategories = 1;
1072  else if (ShowCategory == "name")
1073    Opts.ShowCategories = 2;
1074  else {
1075    Success = false;
1076    if (Diags)
1077      Diags->Report(diag::err_drv_invalid_value)
1078      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1079      << ShowCategory;
1080  }
1081
1082  StringRef Format =
1083    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1084  if (Format == "clang")
1085    Opts.setFormat(DiagnosticOptions::Clang);
1086  else if (Format == "msvc")
1087    Opts.setFormat(DiagnosticOptions::MSVC);
1088  else if (Format == "msvc-fallback") {
1089    Opts.setFormat(DiagnosticOptions::MSVC);
1090    Opts.CLFallbackMode = true;
1091  } else if (Format == "vi")
1092    Opts.setFormat(DiagnosticOptions::Vi);
1093  else {
1094    Success = false;
1095    if (Diags)
1096      Diags->Report(diag::err_drv_invalid_value)
1097      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1098      << Format;
1099  }
1100
1101  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1102  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1103  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1104  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1105  DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1106  Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1107    Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1108    Diags, DiagMask);
1109  if (Args.hasArg(OPT_verify_ignore_unexpected))
1110    DiagMask = DiagnosticLevelMask::All;
1111  Opts.setVerifyIgnoreUnexpected(DiagMask);
1112  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1113  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1114  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1115  Opts.MacroBacktraceLimit =
1116      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1117                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1118  Opts.TemplateBacktraceLimit = getLastArgIntValue(
1119      Args, OPT_ftemplate_backtrace_limit,
1120      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1121  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1122      Args, OPT_fconstexpr_backtrace_limit,
1123      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1124  Opts.SpellCheckingLimit = getLastArgIntValue(
1125      Args, OPT_fspell_checking_limit,
1126      DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1127  Opts.SnippetLineLimit = getLastArgIntValue(
1128      Args, OPT_fcaret_diagnostics_max_lines,
1129      DiagnosticOptions::DefaultSnippetLineLimit, Diags);
1130  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1131                                    DiagnosticOptions::DefaultTabStop, Diags);
1132  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1133    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1134    if (Diags)
1135      Diags->Report(diag::warn_ignoring_ftabstop_value)
1136      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1137  }
1138  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1139  addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1140  addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1141
1142  return Success;
1143}
1144
1145static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1146  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1147}
1148
1149/// Parse the argument to the -ftest-module-file-extension
1150/// command-line argument.
1151///
1152/// \returns true on error, false on success.
1153static bool parseTestModuleFileExtensionArg(StringRef Arg,
1154                                            std::string &BlockName,
1155                                            unsigned &MajorVersion,
1156                                            unsigned &MinorVersion,
1157                                            bool &Hashed,
1158                                            std::string &UserInfo) {
1159  SmallVector<StringRef, 5> Args;
1160  Arg.split(Args, ':', 5);
1161  if (Args.size() < 5)
1162    return true;
1163
1164  BlockName = Args[0];
1165  if (Args[1].getAsInteger(10, MajorVersion)) return true;
1166  if (Args[2].getAsInteger(10, MinorVersion)) return true;
1167  if (Args[3].getAsInteger(2, Hashed)) return true;
1168  if (Args.size() > 4)
1169    UserInfo = Args[4];
1170  return false;
1171}
1172
1173static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1174                                   DiagnosticsEngine &Diags,
1175                                   bool &IsHeaderFile) {
1176  using namespace options;
1177  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1178  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1179    switch (A->getOption().getID()) {
1180    default:
1181      llvm_unreachable("Invalid option in group!");
1182    case OPT_ast_list:
1183      Opts.ProgramAction = frontend::ASTDeclList; break;
1184    case OPT_ast_dump:
1185    case OPT_ast_dump_all:
1186    case OPT_ast_dump_lookups:
1187      Opts.ProgramAction = frontend::ASTDump; break;
1188    case OPT_ast_print:
1189      Opts.ProgramAction = frontend::ASTPrint; break;
1190    case OPT_ast_view:
1191      Opts.ProgramAction = frontend::ASTView; break;
1192    case OPT_dump_raw_tokens:
1193      Opts.ProgramAction = frontend::DumpRawTokens; break;
1194    case OPT_dump_tokens:
1195      Opts.ProgramAction = frontend::DumpTokens; break;
1196    case OPT_S:
1197      Opts.ProgramAction = frontend::EmitAssembly; break;
1198    case OPT_emit_llvm_bc:
1199      Opts.ProgramAction = frontend::EmitBC; break;
1200    case OPT_emit_html:
1201      Opts.ProgramAction = frontend::EmitHTML; break;
1202    case OPT_emit_llvm:
1203      Opts.ProgramAction = frontend::EmitLLVM; break;
1204    case OPT_emit_llvm_only:
1205      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1206    case OPT_emit_codegen_only:
1207      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1208    case OPT_emit_obj:
1209      Opts.ProgramAction = frontend::EmitObj; break;
1210    case OPT_fixit_EQ:
1211      Opts.FixItSuffix = A->getValue();
1212      // fall-through!
1213    case OPT_fixit:
1214      Opts.ProgramAction = frontend::FixIt; break;
1215    case OPT_emit_module:
1216      Opts.ProgramAction = frontend::GenerateModule; break;
1217    case OPT_emit_module_interface:
1218      Opts.ProgramAction = frontend::GenerateModuleInterface; break;
1219    case OPT_emit_pch:
1220      Opts.ProgramAction = frontend::GeneratePCH; break;
1221    case OPT_emit_pth:
1222      Opts.ProgramAction = frontend::GeneratePTH; break;
1223    case OPT_init_only:
1224      Opts.ProgramAction = frontend::InitOnly; break;
1225    case OPT_fsyntax_only:
1226      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1227    case OPT_module_file_info:
1228      Opts.ProgramAction = frontend::ModuleFileInfo; break;
1229    case OPT_verify_pch:
1230      Opts.ProgramAction = frontend::VerifyPCH; break;
1231    case OPT_print_decl_contexts:
1232      Opts.ProgramAction = frontend::PrintDeclContext; break;
1233    case OPT_print_preamble:
1234      Opts.ProgramAction = frontend::PrintPreamble; break;
1235    case OPT_E:
1236      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1237    case OPT_rewrite_macros:
1238      Opts.ProgramAction = frontend::RewriteMacros; break;
1239    case OPT_rewrite_objc:
1240      Opts.ProgramAction = frontend::RewriteObjC; break;
1241    case OPT_rewrite_test:
1242      Opts.ProgramAction = frontend::RewriteTest; break;
1243    case OPT_analyze:
1244      Opts.ProgramAction = frontend::RunAnalysis; break;
1245    case OPT_migrate:
1246      Opts.ProgramAction = frontend::MigrateSource; break;
1247    case OPT_Eonly:
1248      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1249    }
1250  }
1251
1252  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1253    Opts.Plugins.emplace_back(A->getValue(0));
1254    Opts.ProgramAction = frontend::PluginAction;
1255    Opts.ActionName = A->getValue();
1256  }
1257  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1258  for (const Arg *AA : Args.filtered(OPT_plugin_arg))
1259    Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1260
1261  for (const std::string &Arg :
1262         Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1263    std::string BlockName;
1264    unsigned MajorVersion;
1265    unsigned MinorVersion;
1266    bool Hashed;
1267    std::string UserInfo;
1268    if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1269                                        MinorVersion, Hashed, UserInfo)) {
1270      Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1271
1272      continue;
1273    }
1274
1275    // Add the testing module file extension.
1276    Opts.ModuleFileExtensions.push_back(
1277        std::make_shared<TestModuleFileExtension>(
1278            BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
1279  }
1280
1281  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1282    Opts.CodeCompletionAt =
1283      ParsedSourceLocation::FromString(A->getValue());
1284    if (Opts.CodeCompletionAt.FileName.empty())
1285      Diags.Report(diag::err_drv_invalid_value)
1286        << A->getAsString(Args) << A->getValue();
1287  }
1288  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1289
1290  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1291  Opts.Plugins = Args.getAllArgValues(OPT_load);
1292  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1293  Opts.ShowHelp = Args.hasArg(OPT_help);
1294  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1295  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1296  Opts.ShowVersion = Args.hasArg(OPT_version);
1297  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1298  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1299  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1300  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1301  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1302  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1303  Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1304  Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all);
1305  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1306  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1307  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1308  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1309  Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1310  Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1311  Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1312  Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1313  Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1314
1315  Opts.CodeCompleteOpts.IncludeMacros
1316    = Args.hasArg(OPT_code_completion_macros);
1317  Opts.CodeCompleteOpts.IncludeCodePatterns
1318    = Args.hasArg(OPT_code_completion_patterns);
1319  Opts.CodeCompleteOpts.IncludeGlobals
1320    = !Args.hasArg(OPT_no_code_completion_globals);
1321  Opts.CodeCompleteOpts.IncludeBriefComments
1322    = Args.hasArg(OPT_code_completion_brief_comments);
1323
1324  Opts.OverrideRecordLayoutsFile
1325    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1326  Opts.AuxTriple =
1327      llvm::Triple::normalize(Args.getLastArgValue(OPT_aux_triple));
1328  Opts.FindPchSource = Args.getLastArgValue(OPT_find_pch_source_EQ);
1329  Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
1330
1331  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1332                                     OPT_arcmt_modify,
1333                                     OPT_arcmt_migrate)) {
1334    switch (A->getOption().getID()) {
1335    default:
1336      llvm_unreachable("missed a case");
1337    case OPT_arcmt_check:
1338      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1339      break;
1340    case OPT_arcmt_modify:
1341      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1342      break;
1343    case OPT_arcmt_migrate:
1344      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1345      break;
1346    }
1347  }
1348  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1349  Opts.ARCMTMigrateReportOut
1350    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1351  Opts.ARCMTMigrateEmitARCErrors
1352    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1353
1354  if (Args.hasArg(OPT_objcmt_migrate_literals))
1355    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1356  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1357    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1358  if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1359    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1360  if (Args.hasArg(OPT_objcmt_migrate_property))
1361    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1362  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1363    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1364  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1365    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1366  if (Args.hasArg(OPT_objcmt_migrate_annotation))
1367    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1368  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1369    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1370  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1371    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1372  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1373    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1374  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1375    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1376  if (Args.hasArg(OPT_objcmt_atomic_property))
1377    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1378  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1379    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1380  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1381    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1382  if (Args.hasArg(OPT_objcmt_migrate_all))
1383    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1384
1385  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1386
1387  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1388      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1389    Diags.Report(diag::err_drv_argument_not_allowed_with)
1390      << "ARC migration" << "ObjC migration";
1391  }
1392
1393  InputKind DashX(InputKind::Unknown);
1394  if (const Arg *A = Args.getLastArg(OPT_x)) {
1395    StringRef XValue = A->getValue();
1396
1397    // Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
1398    // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
1399    bool Preprocessed = XValue.consume_back("-cpp-output");
1400    bool ModuleMap = XValue.consume_back("-module-map");
1401    IsHeaderFile =
1402        !Preprocessed && !ModuleMap && XValue.consume_back("-header");
1403
1404    // Principal languages.
1405    DashX = llvm::StringSwitch<InputKind>(XValue)
1406                .Case("c", InputKind::C)
1407                .Case("cl", InputKind::OpenCL)
1408                .Case("cuda", InputKind::CUDA)
1409                .Case("c++", InputKind::CXX)
1410                .Case("objective-c", InputKind::ObjC)
1411                .Case("objective-c++", InputKind::ObjCXX)
1412                .Case("renderscript", InputKind::RenderScript)
1413                .Default(InputKind::Unknown);
1414
1415    // "objc[++]-cpp-output" is an acceptable synonym for
1416    // "objective-c[++]-cpp-output".
1417    if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
1418      DashX = llvm::StringSwitch<InputKind>(XValue)
1419                  .Case("objc", InputKind::ObjC)
1420                  .Case("objc++", InputKind::ObjCXX)
1421                  .Default(InputKind::Unknown);
1422
1423    // Some special cases cannot be combined with suffixes.
1424    if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
1425      DashX = llvm::StringSwitch<InputKind>(XValue)
1426                  .Case("cpp-output", InputKind(InputKind::C).getPreprocessed())
1427                  .Case("assembler-with-cpp", InputKind::Asm)
1428                  .Cases("ast", "pcm",
1429                         InputKind(InputKind::Unknown, InputKind::Precompiled))
1430                  .Case("ir", InputKind::LLVM_IR)
1431                  .Default(InputKind::Unknown);
1432
1433    if (DashX.isUnknown())
1434      Diags.Report(diag::err_drv_invalid_value)
1435        << A->getAsString(Args) << A->getValue();
1436
1437    if (Preprocessed)
1438      DashX = DashX.getPreprocessed();
1439    if (ModuleMap)
1440      DashX = DashX.withFormat(InputKind::ModuleMap);
1441  }
1442
1443  // '-' is the default input if none is given.
1444  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1445  Opts.Inputs.clear();
1446  if (Inputs.empty())
1447    Inputs.push_back("-");
1448  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1449    InputKind IK = DashX;
1450    if (IK.isUnknown()) {
1451      IK = FrontendOptions::getInputKindForExtension(
1452        StringRef(Inputs[i]).rsplit('.').second);
1453      // FIXME: Warn on this?
1454      if (IK.isUnknown())
1455        IK = InputKind::C;
1456      // FIXME: Remove this hack.
1457      if (i == 0)
1458        DashX = IK;
1459    }
1460
1461    // The -emit-module action implicitly takes a module map.
1462    if (Opts.ProgramAction == frontend::GenerateModule &&
1463        IK.getFormat() == InputKind::Source)
1464      IK = IK.withFormat(InputKind::ModuleMap);
1465
1466    Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1467  }
1468
1469  return DashX;
1470}
1471
1472std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1473                                                 void *MainAddr) {
1474  std::string ClangExecutable =
1475      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1476  StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1477
1478  // Compute the path to the resource directory.
1479  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1480  SmallString<128> P(Dir);
1481  if (ClangResourceDir != "")
1482    llvm::sys::path::append(P, ClangResourceDir);
1483  else
1484    llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1485                            "clang", CLANG_VERSION_STRING);
1486
1487  return P.str();
1488}
1489
1490static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
1491                                  const std::string &WorkingDir) {
1492  using namespace options;
1493  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1494  Opts.Verbose = Args.hasArg(OPT_v);
1495  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1496  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1497  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1498  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1499    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1500  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1501
1502  // Canonicalize -fmodules-cache-path before storing it.
1503  SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
1504  if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
1505    if (WorkingDir.empty())
1506      llvm::sys::fs::make_absolute(P);
1507    else
1508      llvm::sys::fs::make_absolute(WorkingDir, P);
1509  }
1510  llvm::sys::path::remove_dots(P);
1511  Opts.ModuleCachePath = P.str();
1512
1513  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1514  for (const Arg *A : Args.filtered(OPT_fprebuilt_module_path))
1515    Opts.AddPrebuiltModulePath(A->getValue());
1516  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1517  Opts.ModulesHashContent = Args.hasArg(OPT_fmodules_hash_content);
1518  Opts.ModulesValidateDiagnosticOptions =
1519      !Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
1520  Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1521  Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1522  Opts.ModuleCachePruneInterval =
1523      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1524  Opts.ModuleCachePruneAfter =
1525      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1526  Opts.ModulesValidateOncePerBuildSession =
1527      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1528  Opts.BuildSessionTimestamp =
1529      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1530  Opts.ModulesValidateSystemHeaders =
1531      Args.hasArg(OPT_fmodules_validate_system_headers);
1532  if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1533    Opts.ModuleFormat = A->getValue();
1534
1535  for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1536    StringRef MacroDef = A->getValue();
1537    Opts.ModulesIgnoreMacros.insert(
1538        llvm::CachedHashString(MacroDef.split('=').first));
1539  }
1540
1541  // Add -I..., -F..., and -index-header-map options in order.
1542  bool IsIndexHeaderMap = false;
1543  bool IsSysrootSpecified =
1544      Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1545  for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1546    if (A->getOption().matches(OPT_index_header_map)) {
1547      // -index-header-map applies to the next -I or -F.
1548      IsIndexHeaderMap = true;
1549      continue;
1550    }
1551
1552    frontend::IncludeDirGroup Group =
1553        IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1554
1555    bool IsFramework = A->getOption().matches(OPT_F);
1556    std::string Path = A->getValue();
1557
1558    if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1559      SmallString<32> Buffer;
1560      llvm::sys::path::append(Buffer, Opts.Sysroot,
1561                              llvm::StringRef(A->getValue()).substr(1));
1562      Path = Buffer.str();
1563    }
1564
1565    Opts.AddPath(Path, Group, IsFramework,
1566                 /*IgnoreSysroot*/ true);
1567    IsIndexHeaderMap = false;
1568  }
1569
1570  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1571  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1572  for (const Arg *A :
1573       Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1574    if (A->getOption().matches(OPT_iprefix))
1575      Prefix = A->getValue();
1576    else if (A->getOption().matches(OPT_iwithprefix))
1577      Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1578    else
1579      Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1580  }
1581
1582  for (const Arg *A : Args.filtered(OPT_idirafter))
1583    Opts.AddPath(A->getValue(), frontend::After, false, true);
1584  for (const Arg *A : Args.filtered(OPT_iquote))
1585    Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1586  for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1587    Opts.AddPath(A->getValue(), frontend::System, false,
1588                 !A->getOption().matches(OPT_iwithsysroot));
1589  for (const Arg *A : Args.filtered(OPT_iframework))
1590    Opts.AddPath(A->getValue(), frontend::System, true, true);
1591  for (const Arg *A : Args.filtered(OPT_iframeworkwithsysroot))
1592    Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
1593                 /*IgnoreSysRoot=*/false);
1594
1595  // Add the paths for the various language specific isystem flags.
1596  for (const Arg *A : Args.filtered(OPT_c_isystem))
1597    Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1598  for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1599    Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1600  for (const Arg *A : Args.filtered(OPT_objc_isystem))
1601    Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1602  for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1603    Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1604
1605  // Add the internal paths from a driver that detects standard include paths.
1606  for (const Arg *A :
1607       Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1608    frontend::IncludeDirGroup Group = frontend::System;
1609    if (A->getOption().matches(OPT_internal_externc_isystem))
1610      Group = frontend::ExternCSystem;
1611    Opts.AddPath(A->getValue(), Group, false, true);
1612  }
1613
1614  // Add the path prefixes which are implicitly treated as being system headers.
1615  for (const Arg *A :
1616       Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1617    Opts.AddSystemHeaderPrefix(
1618        A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1619
1620  for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1621    Opts.AddVFSOverlayFile(A->getValue());
1622}
1623
1624void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1625                                         const llvm::Triple &T,
1626                                         PreprocessorOptions &PPOpts,
1627                                         LangStandard::Kind LangStd) {
1628  // Set some properties which depend solely on the input kind; it would be nice
1629  // to move these to the language standard, and have the driver resolve the
1630  // input kind + language standard.
1631  //
1632  // FIXME: Perhaps a better model would be for a single source file to have
1633  // multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
1634  // simultaneously active?
1635  if (IK.getLanguage() == InputKind::Asm) {
1636    Opts.AsmPreprocessor = 1;
1637  } else if (IK.isObjectiveC()) {
1638    Opts.ObjC1 = Opts.ObjC2 = 1;
1639  }
1640
1641  if (LangStd == LangStandard::lang_unspecified) {
1642    // Based on the base language, pick one.
1643    switch (IK.getLanguage()) {
1644    case InputKind::Unknown:
1645    case InputKind::LLVM_IR:
1646      llvm_unreachable("Invalid input kind!");
1647    case InputKind::OpenCL:
1648      LangStd = LangStandard::lang_opencl10;
1649      break;
1650    case InputKind::CUDA:
1651      LangStd = LangStandard::lang_cuda;
1652      break;
1653    case InputKind::Asm:
1654    case InputKind::C:
1655      // The PS4 uses C99 as the default C standard.
1656      if (T.isPS4())
1657        LangStd = LangStandard::lang_gnu99;
1658      else
1659        LangStd = LangStandard::lang_gnu11;
1660      break;
1661    case InputKind::ObjC:
1662      LangStd = LangStandard::lang_gnu11;
1663      break;
1664    case InputKind::CXX:
1665    case InputKind::ObjCXX:
1666      // The PS4 uses C++11 as the default C++ standard.
1667      if (T.isPS4())
1668        LangStd = LangStandard::lang_gnucxx11;
1669      else
1670        LangStd = LangStandard::lang_gnucxx98;
1671      break;
1672    case InputKind::RenderScript:
1673      LangStd = LangStandard::lang_c99;
1674      break;
1675    }
1676  }
1677
1678  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1679  Opts.LineComment = Std.hasLineComments();
1680  Opts.C99 = Std.isC99();
1681  Opts.C11 = Std.isC11();
1682  Opts.CPlusPlus = Std.isCPlusPlus();
1683  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1684  Opts.CPlusPlus14 = Std.isCPlusPlus14();
1685  Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1686  Opts.CPlusPlus2a = Std.isCPlusPlus2a();
1687  Opts.Digraphs = Std.hasDigraphs();
1688  Opts.GNUMode = Std.isGNUMode();
1689  Opts.GNUInline = !Opts.C99 && !Opts.CPlusPlus;
1690  Opts.HexFloats = Std.hasHexFloats();
1691  Opts.ImplicitInt = Std.hasImplicitInt();
1692
1693  // Set OpenCL Version.
1694  Opts.OpenCL = Std.isOpenCL();
1695  if (LangStd == LangStandard::lang_opencl10)
1696    Opts.OpenCLVersion = 100;
1697  else if (LangStd == LangStandard::lang_opencl11)
1698    Opts.OpenCLVersion = 110;
1699  else if (LangStd == LangStandard::lang_opencl12)
1700    Opts.OpenCLVersion = 120;
1701  else if (LangStd == LangStandard::lang_opencl20)
1702    Opts.OpenCLVersion = 200;
1703
1704  // OpenCL has some additional defaults.
1705  if (Opts.OpenCL) {
1706    Opts.AltiVec = 0;
1707    Opts.ZVector = 0;
1708    Opts.LaxVectorConversions = 0;
1709    Opts.setDefaultFPContractMode(LangOptions::FPC_On);
1710    Opts.NativeHalfType = 1;
1711    Opts.NativeHalfArgsAndReturns = 1;
1712    // Include default header file for OpenCL.
1713    if (Opts.IncludeDefaultHeader) {
1714      PPOpts.Includes.push_back("opencl-c.h");
1715    }
1716  }
1717
1718  Opts.CUDA = IK.getLanguage() == InputKind::CUDA;
1719  if (Opts.CUDA)
1720    // Set default FP_CONTRACT to FAST.
1721    Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
1722
1723  Opts.RenderScript = IK.getLanguage() == InputKind::RenderScript;
1724  if (Opts.RenderScript) {
1725    Opts.NativeHalfType = 1;
1726    Opts.NativeHalfArgsAndReturns = 1;
1727  }
1728
1729  // OpenCL and C++ both have bool, true, false keywords.
1730  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1731
1732  // OpenCL has half keyword
1733  Opts.Half = Opts.OpenCL;
1734
1735  // C++ has wchar_t keyword.
1736  Opts.WChar = Opts.CPlusPlus;
1737
1738  Opts.GNUKeywords = Opts.GNUMode;
1739  Opts.CXXOperatorNames = Opts.CPlusPlus;
1740
1741  Opts.AlignedAllocation = Opts.CPlusPlus1z;
1742
1743  Opts.DollarIdents = !Opts.AsmPreprocessor;
1744}
1745
1746/// Attempt to parse a visibility value out of the given argument.
1747static Visibility parseVisibility(Arg *arg, ArgList &args,
1748                                  DiagnosticsEngine &diags) {
1749  StringRef value = arg->getValue();
1750  if (value == "default") {
1751    return DefaultVisibility;
1752  } else if (value == "hidden" || value == "internal") {
1753    return HiddenVisibility;
1754  } else if (value == "protected") {
1755    // FIXME: diagnose if target does not support protected visibility
1756    return ProtectedVisibility;
1757  }
1758
1759  diags.Report(diag::err_drv_invalid_value)
1760    << arg->getAsString(args) << value;
1761  return DefaultVisibility;
1762}
1763
1764/// Check if input file kind and language standard are compatible.
1765static bool IsInputCompatibleWithStandard(InputKind IK,
1766                                          const LangStandard &S) {
1767  switch (IK.getLanguage()) {
1768  case InputKind::Unknown:
1769  case InputKind::LLVM_IR:
1770    llvm_unreachable("should not parse language flags for this input");
1771
1772  case InputKind::C:
1773  case InputKind::ObjC:
1774  case InputKind::RenderScript:
1775    return S.getLanguage() == InputKind::C;
1776
1777  case InputKind::OpenCL:
1778    return S.getLanguage() == InputKind::OpenCL;
1779
1780  case InputKind::CXX:
1781  case InputKind::ObjCXX:
1782    return S.getLanguage() == InputKind::CXX;
1783
1784  case InputKind::CUDA:
1785    // FIXME: What -std= values should be permitted for CUDA compilations?
1786    return S.getLanguage() == InputKind::CUDA ||
1787           S.getLanguage() == InputKind::CXX;
1788
1789  case InputKind::Asm:
1790    // Accept (and ignore) all -std= values.
1791    // FIXME: The -std= value is not ignored; it affects the tokenization
1792    // and preprocessing rules if we're preprocessing this asm input.
1793    return true;
1794  }
1795
1796  llvm_unreachable("unexpected input language");
1797}
1798
1799/// Get language name for given input kind.
1800static const StringRef GetInputKindName(InputKind IK) {
1801  switch (IK.getLanguage()) {
1802  case InputKind::C:
1803    return "C";
1804  case InputKind::ObjC:
1805    return "Objective-C";
1806  case InputKind::CXX:
1807    return "C++";
1808  case InputKind::ObjCXX:
1809    return "Objective-C++";
1810  case InputKind::OpenCL:
1811    return "OpenCL";
1812  case InputKind::CUDA:
1813    return "CUDA";
1814  case InputKind::RenderScript:
1815    return "RenderScript";
1816
1817  case InputKind::Asm:
1818    return "Asm";
1819  case InputKind::LLVM_IR:
1820    return "LLVM IR";
1821
1822  case InputKind::Unknown:
1823    break;
1824  }
1825  llvm_unreachable("unknown input language");
1826}
1827
1828static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1829                          const TargetOptions &TargetOpts,
1830                          PreprocessorOptions &PPOpts,
1831                          DiagnosticsEngine &Diags) {
1832  // FIXME: Cleanup per-file based stuff.
1833  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1834  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1835    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1836#define LANGSTANDARD(id, name, lang, desc, features) \
1837      .Case(name, LangStandard::lang_##id)
1838#define LANGSTANDARD_ALIAS(id, alias) \
1839      .Case(alias, LangStandard::lang_##id)
1840#include "clang/Frontend/LangStandards.def"
1841      .Default(LangStandard::lang_unspecified);
1842    if (LangStd == LangStandard::lang_unspecified) {
1843      Diags.Report(diag::err_drv_invalid_value)
1844        << A->getAsString(Args) << A->getValue();
1845      // Report supported standards with short description.
1846      for (unsigned KindValue = 0;
1847           KindValue != LangStandard::lang_unspecified;
1848           ++KindValue) {
1849        const LangStandard &Std = LangStandard::getLangStandardForKind(
1850          static_cast<LangStandard::Kind>(KindValue));
1851        if (IsInputCompatibleWithStandard(IK, Std)) {
1852          auto Diag = Diags.Report(diag::note_drv_use_standard);
1853          Diag << Std.getName() << Std.getDescription();
1854          unsigned NumAliases = 0;
1855#define LANGSTANDARD(id, name, lang, desc, features)
1856#define LANGSTANDARD_ALIAS(id, alias) \
1857          if (KindValue == LangStandard::lang_##id) ++NumAliases;
1858#define LANGSTANDARD_ALIAS_DEPR(id, alias)
1859#include "clang/Frontend/LangStandards.def"
1860          Diag << NumAliases;
1861#define LANGSTANDARD(id, name, lang, desc, features)
1862#define LANGSTANDARD_ALIAS(id, alias) \
1863          if (KindValue == LangStandard::lang_##id) Diag << alias;
1864#define LANGSTANDARD_ALIAS_DEPR(id, alias)
1865#include "clang/Frontend/LangStandards.def"
1866        }
1867      }
1868    } else {
1869      // Valid standard, check to make sure language and standard are
1870      // compatible.
1871      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1872      if (!IsInputCompatibleWithStandard(IK, Std)) {
1873        Diags.Report(diag::err_drv_argument_not_allowed_with)
1874          << A->getAsString(Args) << GetInputKindName(IK);
1875      }
1876    }
1877  }
1878
1879  // -cl-std only applies for OpenCL language standards.
1880  // Override the -std option in this case.
1881  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1882    LangStandard::Kind OpenCLLangStd
1883      = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1884        .Cases("cl", "CL", LangStandard::lang_opencl10)
1885        .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
1886        .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
1887        .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
1888        .Default(LangStandard::lang_unspecified);
1889
1890    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1891      Diags.Report(diag::err_drv_invalid_value)
1892        << A->getAsString(Args) << A->getValue();
1893    }
1894    else
1895      LangStd = OpenCLLangStd;
1896  }
1897
1898  Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
1899
1900  llvm::Triple T(TargetOpts.Triple);
1901  CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
1902
1903  // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
1904  // This option should be deprecated for CL > 1.0 because
1905  // this option was added for compatibility with OpenCL 1.0.
1906  if (Args.getLastArg(OPT_cl_strict_aliasing)
1907       && Opts.OpenCLVersion > 100) {
1908    std::string VerSpec = llvm::to_string(Opts.OpenCLVersion / 100) +
1909                          std::string(".") +
1910                          llvm::to_string((Opts.OpenCLVersion % 100) / 10);
1911    Diags.Report(diag::warn_option_invalid_ocl_version)
1912      << VerSpec << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
1913  }
1914
1915  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1916  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1917  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1918  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1919  // name, as it doesn't seem a useful distinction.
1920  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1921                                  Opts.GNUKeywords);
1922
1923  if (Args.hasArg(OPT_fno_operator_names))
1924    Opts.CXXOperatorNames = 0;
1925
1926  if (Args.hasArg(OPT_fcuda_is_device))
1927    Opts.CUDAIsDevice = 1;
1928
1929  if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
1930    Opts.CUDAAllowVariadicFunctions = 1;
1931
1932  if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
1933    Opts.CUDAHostDeviceConstexpr = 0;
1934
1935  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_flush_denormals_to_zero))
1936    Opts.CUDADeviceFlushDenormalsToZero = 1;
1937
1938  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
1939    Opts.CUDADeviceApproxTranscendentals = 1;
1940
1941  if (Opts.ObjC1) {
1942    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1943      StringRef value = arg->getValue();
1944      if (Opts.ObjCRuntime.tryParse(value))
1945        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1946    }
1947
1948    if (Args.hasArg(OPT_fobjc_gc_only))
1949      Opts.setGC(LangOptions::GCOnly);
1950    else if (Args.hasArg(OPT_fobjc_gc))
1951      Opts.setGC(LangOptions::HybridGC);
1952    else if (Args.hasArg(OPT_fobjc_arc)) {
1953      Opts.ObjCAutoRefCount = 1;
1954      if (!Opts.ObjCRuntime.allowsARC())
1955        Diags.Report(diag::err_arc_unsupported_on_runtime);
1956    }
1957
1958    // ObjCWeakRuntime tracks whether the runtime supports __weak, not
1959    // whether the feature is actually enabled.  This is predominantly
1960    // determined by -fobjc-runtime, but we allow it to be overridden
1961    // from the command line for testing purposes.
1962    if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1963      Opts.ObjCWeakRuntime = 1;
1964    else
1965      Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
1966
1967    // ObjCWeak determines whether __weak is actually enabled.
1968    // Note that we allow -fno-objc-weak to disable this even in ARC mode.
1969    if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
1970      if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
1971        assert(!Opts.ObjCWeak);
1972      } else if (Opts.getGC() != LangOptions::NonGC) {
1973        Diags.Report(diag::err_objc_weak_with_gc);
1974      } else if (!Opts.ObjCWeakRuntime) {
1975        Diags.Report(diag::err_objc_weak_unsupported);
1976      } else {
1977        Opts.ObjCWeak = 1;
1978      }
1979    } else if (Opts.ObjCAutoRefCount) {
1980      Opts.ObjCWeak = Opts.ObjCWeakRuntime;
1981    }
1982
1983    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1984      Opts.ObjCInferRelatedResultType = 0;
1985
1986    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1987      Opts.ObjCSubscriptingLegacyRuntime =
1988        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1989  }
1990
1991  if (Args.hasArg(OPT_fgnu89_inline)) {
1992    if (Opts.CPlusPlus)
1993      Diags.Report(diag::err_drv_argument_not_allowed_with)
1994        << "-fgnu89-inline" << GetInputKindName(IK);
1995    else
1996      Opts.GNUInline = 1;
1997  }
1998
1999  if (Args.hasArg(OPT_fapple_kext)) {
2000    if (!Opts.CPlusPlus)
2001      Diags.Report(diag::warn_c_kext);
2002    else
2003      Opts.AppleKext = 1;
2004  }
2005
2006  if (Args.hasArg(OPT_print_ivar_layout))
2007    Opts.ObjCGCBitmapPrint = 1;
2008  if (Args.hasArg(OPT_fno_constant_cfstrings))
2009    Opts.NoConstantCFStrings = 1;
2010
2011  if (Args.hasArg(OPT_fzvector))
2012    Opts.ZVector = 1;
2013
2014  if (Args.hasArg(OPT_pthread))
2015    Opts.POSIXThreads = 1;
2016
2017  // The value-visibility mode defaults to "default".
2018  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
2019    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
2020  } else {
2021    Opts.setValueVisibilityMode(DefaultVisibility);
2022  }
2023
2024  // The type-visibility mode defaults to the value-visibility mode.
2025  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
2026    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
2027  } else {
2028    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
2029  }
2030
2031  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2032    Opts.InlineVisibilityHidden = 1;
2033
2034  if (Args.hasArg(OPT_ftrapv)) {
2035    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2036    // Set the handler, if one is specified.
2037    Opts.OverflowHandler =
2038        Args.getLastArgValue(OPT_ftrapv_handler);
2039  }
2040  else if (Args.hasArg(OPT_fwrapv))
2041    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2042
2043  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
2044  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
2045  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
2046  Opts.MSCompatibilityVersion = 0;
2047  if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
2048    VersionTuple VT;
2049    if (VT.tryParse(A->getValue()))
2050      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2051                                                << A->getValue();
2052    Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
2053                                  VT.getMinor().getValueOr(0) * 100000 +
2054                                  VT.getSubminor().getValueOr(0);
2055  }
2056
2057  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
2058  // is specified, or -std is set to a conforming mode.
2059  // Trigraphs are disabled by default in c++1z onwards.
2060  Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
2061  Opts.Trigraphs =
2062      Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
2063
2064  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2065                                   OPT_fno_dollars_in_identifiers,
2066                                   Opts.DollarIdents);
2067  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2068  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
2069  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2070  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2071  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2072                                   Opts.ConstStrings);
2073  if (Args.hasArg(OPT_fno_lax_vector_conversions))
2074    Opts.LaxVectorConversions = 0;
2075  if (Args.hasArg(OPT_fno_threadsafe_statics))
2076    Opts.ThreadsafeStatics = 0;
2077  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2078  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2079  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2080  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2081  Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
2082  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2083
2084  Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
2085  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
2086  Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
2087    && Opts.OpenCLVersion >= 200);
2088  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2089  Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
2090  Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
2091  Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
2092  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
2093  Opts.ModulesDeclUse =
2094      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
2095  Opts.ModulesLocalVisibility =
2096      Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
2097  Opts.ModulesCodegen = Args.hasArg(OPT_fmodules_codegen);
2098  Opts.ModulesDebugInfo = Args.hasArg(OPT_fmodules_debuginfo);
2099  Opts.ModulesSearchAll = Opts.Modules &&
2100    !Args.hasArg(OPT_fno_modules_search_all) &&
2101    Args.hasArg(OPT_fmodules_search_all);
2102  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
2103  Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
2104  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
2105  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2106  Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
2107  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2108  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2109  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2110  if (!Opts.NoBuiltin)
2111    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
2112  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
2113  Opts.RelaxedTemplateTemplateArgs =
2114      Args.hasArg(OPT_frelaxed_template_template_args);
2115  Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
2116  Opts.AlignedAllocation =
2117      Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
2118                   Opts.AlignedAllocation);
2119  Opts.AlignedAllocationUnavailable =
2120      Opts.AlignedAllocation && Args.hasArg(OPT_aligned_alloc_unavailable);
2121  Opts.NewAlignOverride =
2122      getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
2123  if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
2124    Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
2125    Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
2126                                                 << A->getValue();
2127    Opts.NewAlignOverride = 0;
2128  }
2129  Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
2130  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2131  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2132  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2133  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
2134  Opts.InstantiationDepth =
2135      getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
2136  Opts.ArrowDepth =
2137      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
2138  Opts.ConstexprCallDepth =
2139      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
2140  Opts.ConstexprStepLimit =
2141      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
2142  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
2143  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2144  Opts.NumLargeByValueCopy =
2145      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
2146  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2147  Opts.ObjCConstantStringClass =
2148    Args.getLastArgValue(OPT_fconstant_string_class);
2149  Opts.ObjCDefaultSynthProperties =
2150    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
2151  Opts.EncodeExtendedBlockSig =
2152    Args.hasArg(OPT_fencode_extended_block_signature);
2153  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2154  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
2155  Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
2156  Opts.AlignDouble = Args.hasArg(OPT_malign_double);
2157  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2158  Opts.PIE = Args.hasArg(OPT_pic_is_pie);
2159  Opts.Static = Args.hasArg(OPT_static_define);
2160  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2161  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2162                        || Args.hasArg(OPT_fdump_record_layouts);
2163  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2164  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2165  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2166  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2167  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2168  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2169  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2170  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2171  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2172  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2173  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2174  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2175  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name_EQ);
2176  Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
2177  Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
2178  std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
2179  Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
2180  Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
2181  // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
2182  // is enabled.
2183  Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
2184                            | Opts.NativeHalfArgsAndReturns;
2185  Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
2186
2187  // __declspec is enabled by default for the PS4 by the driver, and also
2188  // enabled for Microsoft Extensions or Borland Extensions, here.
2189  //
2190  // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
2191  // CUDA extension. However, it is required for supporting
2192  // __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
2193  // been rewritten in terms of something more generic, remove the Opts.CUDA
2194  // term here.
2195  Opts.DeclSpecKeyword =
2196      Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
2197                   (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
2198
2199  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
2200    switch (llvm::StringSwitch<unsigned>(A->getValue())
2201      .Case("target", LangOptions::ASMM_Target)
2202      .Case("no", LangOptions::ASMM_Off)
2203      .Case("yes", LangOptions::ASMM_On)
2204      .Default(255)) {
2205    default:
2206      Diags.Report(diag::err_drv_invalid_value)
2207        << "-faddress-space-map-mangling=" << A->getValue();
2208      break;
2209    case LangOptions::ASMM_Target:
2210      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
2211      break;
2212    case LangOptions::ASMM_On:
2213      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
2214      break;
2215    case LangOptions::ASMM_Off:
2216      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
2217      break;
2218    }
2219  }
2220
2221  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
2222    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
2223        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
2224            A->getValue())
2225            .Case("single",
2226                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
2227            .Case("multiple",
2228                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2229            .Case("virtual",
2230                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2231            .Default(LangOptions::PPTMK_BestCase);
2232    if (InheritanceModel == LangOptions::PPTMK_BestCase)
2233      Diags.Report(diag::err_drv_invalid_value)
2234          << "-fms-memptr-rep=" << A->getValue();
2235
2236    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2237  }
2238
2239  // Check for MS default calling conventions being specified.
2240  if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2241    LangOptions::DefaultCallingConvention DefaultCC =
2242        llvm::StringSwitch<LangOptions::DefaultCallingConvention>(
2243            A->getValue())
2244            .Case("cdecl", LangOptions::DCC_CDecl)
2245            .Case("fastcall", LangOptions::DCC_FastCall)
2246            .Case("stdcall", LangOptions::DCC_StdCall)
2247            .Case("vectorcall", LangOptions::DCC_VectorCall)
2248            .Default(LangOptions::DCC_None);
2249    if (DefaultCC == LangOptions::DCC_None)
2250      Diags.Report(diag::err_drv_invalid_value)
2251          << "-fdefault-calling-conv=" << A->getValue();
2252
2253    llvm::Triple T(TargetOpts.Triple);
2254    llvm::Triple::ArchType Arch = T.getArch();
2255    bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2256                      DefaultCC == LangOptions::DCC_StdCall) &&
2257                     Arch != llvm::Triple::x86;
2258    emitError |= DefaultCC == LangOptions::DCC_VectorCall &&
2259                 !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2260    if (emitError)
2261      Diags.Report(diag::err_drv_argument_not_allowed_with)
2262          << A->getSpelling() << T.getTriple();
2263    else
2264      Opts.setDefaultCallingConv(DefaultCC);
2265  }
2266
2267  // -mrtd option
2268  if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2269    if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2270      Diags.Report(diag::err_drv_argument_not_allowed_with)
2271          << A->getSpelling() << "-fdefault-calling-conv";
2272    else {
2273      llvm::Triple T(TargetOpts.Triple);
2274      if (T.getArch() != llvm::Triple::x86)
2275        Diags.Report(diag::err_drv_argument_not_allowed_with)
2276            << A->getSpelling() << T.getTriple();
2277      else
2278        Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2279    }
2280  }
2281
2282  // Check if -fopenmp is specified.
2283  Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2284  Opts.OpenMPUseTLS =
2285      Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2286  Opts.OpenMPIsDevice =
2287      Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2288
2289  if (Opts.OpenMP) {
2290    int Version =
2291        getLastArgIntValue(Args, OPT_fopenmp_version_EQ, Opts.OpenMP, Diags);
2292    if (Version != 0)
2293      Opts.OpenMP = Version;
2294    // Provide diagnostic when a given target is not expected to be an OpenMP
2295    // device or host.
2296    if (!Opts.OpenMPIsDevice) {
2297      switch (T.getArch()) {
2298      default:
2299        break;
2300      // Add unsupported host targets here:
2301      case llvm::Triple::nvptx:
2302      case llvm::Triple::nvptx64:
2303        Diags.Report(clang::diag::err_drv_omp_host_target_not_supported)
2304            << TargetOpts.Triple;
2305        break;
2306      }
2307    }
2308  }
2309
2310  // Get the OpenMP target triples if any.
2311  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2312
2313    for (unsigned i = 0; i < A->getNumValues(); ++i) {
2314      llvm::Triple TT(A->getValue(i));
2315
2316      if (TT.getArch() == llvm::Triple::UnknownArch)
2317        Diags.Report(clang::diag::err_drv_invalid_omp_target) << A->getValue(i);
2318      else
2319        Opts.OMPTargetTriples.push_back(TT);
2320    }
2321  }
2322
2323  // Get OpenMP host file path if any and report if a non existent file is
2324  // found
2325  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2326    Opts.OMPHostIRFile = A->getValue();
2327    if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2328      Diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
2329          << Opts.OMPHostIRFile;
2330  }
2331
2332  // Record whether the __DEPRECATED define was requested.
2333  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2334                                 OPT_fno_deprecated_macro,
2335                                 Opts.Deprecated);
2336
2337  // FIXME: Eliminate this dependency.
2338  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2339       OptSize = getOptimizationLevelSize(Args);
2340  Opts.Optimize = Opt != 0;
2341  Opts.OptimizeSize = OptSize != 0;
2342
2343  // This is the __NO_INLINE__ define, which just depends on things like the
2344  // optimization level and -fno-inline, not actually whether the backend has
2345  // inlining enabled.
2346  Opts.NoInlineDefine = !Opts.Optimize;
2347  if (Arg *InlineArg = Args.getLastArg(
2348          options::OPT_finline_functions, options::OPT_finline_hint_functions,
2349          options::OPT_fno_inline_functions, options::OPT_fno_inline))
2350    if (InlineArg->getOption().matches(options::OPT_fno_inline))
2351      Opts.NoInlineDefine = true;
2352
2353  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2354      Args.hasArg(OPT_cl_fast_relaxed_math);
2355  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2356      Args.hasArg(OPT_cl_finite_math_only) ||
2357      Args.hasArg(OPT_cl_fast_relaxed_math);
2358  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2359                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2360                      Args.hasArg(OPT_cl_fast_relaxed_math);
2361
2362  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2363    StringRef Val = A->getValue();
2364    if (Val == "fast")
2365      Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
2366    else if (Val == "on")
2367      Opts.setDefaultFPContractMode(LangOptions::FPC_On);
2368    else if (Val == "off")
2369      Opts.setDefaultFPContractMode(LangOptions::FPC_Off);
2370    else
2371      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2372  }
2373
2374  Opts.RetainCommentsFromSystemHeaders =
2375      Args.hasArg(OPT_fretain_comments_from_system_headers);
2376
2377  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2378  switch (SSP) {
2379  default:
2380    Diags.Report(diag::err_drv_invalid_value)
2381      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2382    break;
2383  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2384  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2385  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2386  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2387  }
2388
2389  // Parse -fsanitize= arguments.
2390  parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2391                      Diags, Opts.Sanitize);
2392  // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2393  Opts.SanitizeAddressFieldPadding =
2394      getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2395  Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2396
2397  // -fxray-instrument
2398  Opts.XRayInstrument =
2399      Args.hasFlag(OPT_fxray_instrument, OPT_fnoxray_instrument, false);
2400
2401  // -fxray-{always,never}-instrument= filenames.
2402  Opts.XRayAlwaysInstrumentFiles =
2403      Args.getAllArgValues(OPT_fxray_always_instrument);
2404  Opts.XRayNeverInstrumentFiles =
2405      Args.getAllArgValues(OPT_fxray_never_instrument);
2406
2407  // -fallow-editor-placeholders
2408  Opts.AllowEditorPlaceholders = Args.hasArg(OPT_fallow_editor_placeholders);
2409}
2410
2411static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
2412  switch (Action) {
2413  case frontend::ASTDeclList:
2414  case frontend::ASTDump:
2415  case frontend::ASTPrint:
2416  case frontend::ASTView:
2417  case frontend::EmitAssembly:
2418  case frontend::EmitBC:
2419  case frontend::EmitHTML:
2420  case frontend::EmitLLVM:
2421  case frontend::EmitLLVMOnly:
2422  case frontend::EmitCodeGenOnly:
2423  case frontend::EmitObj:
2424  case frontend::FixIt:
2425  case frontend::GenerateModule:
2426  case frontend::GenerateModuleInterface:
2427  case frontend::GeneratePCH:
2428  case frontend::GeneratePTH:
2429  case frontend::ParseSyntaxOnly:
2430  case frontend::ModuleFileInfo:
2431  case frontend::VerifyPCH:
2432  case frontend::PluginAction:
2433  case frontend::PrintDeclContext:
2434  case frontend::RewriteObjC:
2435  case frontend::RewriteTest:
2436  case frontend::RunAnalysis:
2437  case frontend::MigrateSource:
2438    return false;
2439
2440  case frontend::DumpRawTokens:
2441  case frontend::DumpTokens:
2442  case frontend::InitOnly:
2443  case frontend::PrintPreamble:
2444  case frontend::PrintPreprocessedInput:
2445  case frontend::RewriteMacros:
2446  case frontend::RunPreprocessorOnly:
2447    return true;
2448  }
2449  llvm_unreachable("invalid frontend action");
2450}
2451
2452static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2453                                  FileManager &FileMgr,
2454                                  DiagnosticsEngine &Diags,
2455                                  frontend::ActionKind Action) {
2456  using namespace options;
2457  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2458  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2459  if (const Arg *A = Args.getLastArg(OPT_token_cache))
2460      Opts.TokenCache = A->getValue();
2461  else
2462    Opts.TokenCache = Opts.ImplicitPTHInclude;
2463  Opts.UsePredefines = !Args.hasArg(OPT_undef);
2464  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2465  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2466  Opts.AllowPCHWithCompilerErrors = Args.hasArg(OPT_fallow_pch_with_errors);
2467
2468  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2469  for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
2470    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
2471
2472  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2473    StringRef Value(A->getValue());
2474    size_t Comma = Value.find(',');
2475    unsigned Bytes = 0;
2476    unsigned EndOfLine = 0;
2477
2478    if (Comma == StringRef::npos ||
2479        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2480        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2481      Diags.Report(diag::err_drv_preamble_format);
2482    else {
2483      Opts.PrecompiledPreambleBytes.first = Bytes;
2484      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2485    }
2486  }
2487
2488  // Add macros from the command line.
2489  for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
2490    if (A->getOption().matches(OPT_D))
2491      Opts.addMacroDef(A->getValue());
2492    else
2493      Opts.addMacroUndef(A->getValue());
2494  }
2495
2496  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2497
2498  // Add the ordered list of -includes.
2499  for (const Arg *A : Args.filtered(OPT_include))
2500    Opts.Includes.emplace_back(A->getValue());
2501
2502  for (const Arg *A : Args.filtered(OPT_chain_include))
2503    Opts.ChainedIncludes.emplace_back(A->getValue());
2504
2505  for (const Arg *A : Args.filtered(OPT_remap_file)) {
2506    std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
2507
2508    if (Split.second.empty()) {
2509      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2510      continue;
2511    }
2512
2513    Opts.addRemappedFile(Split.first, Split.second);
2514  }
2515
2516  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2517    StringRef Name = A->getValue();
2518    unsigned Library = llvm::StringSwitch<unsigned>(Name)
2519      .Case("libc++", ARCXX_libcxx)
2520      .Case("libstdc++", ARCXX_libstdcxx)
2521      .Case("none", ARCXX_nolib)
2522      .Default(~0U);
2523    if (Library == ~0U)
2524      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2525    else
2526      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2527  }
2528
2529  // Always avoid lexing editor placeholders when we're just running the
2530  // preprocessor as we never want to emit the
2531  // "editor placeholder in source file" error in PP only mode.
2532  if (isStrictlyPreprocessorAction(Action))
2533    Opts.LexEditorPlaceholders = false;
2534}
2535
2536static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2537                                        ArgList &Args,
2538                                        frontend::ActionKind Action) {
2539  using namespace options;
2540
2541  if (isStrictlyPreprocessorAction(Action))
2542    Opts.ShowCPP = !Args.hasArg(OPT_dM);
2543  else
2544    Opts.ShowCPP = 0;
2545
2546  Opts.ShowComments = Args.hasArg(OPT_C);
2547  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2548  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2549  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2550  Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
2551  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2552  Opts.RewriteImports = Args.hasArg(OPT_frewrite_imports);
2553  Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
2554}
2555
2556static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
2557                            DiagnosticsEngine &Diags) {
2558  using namespace options;
2559  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2560  if (Arg *A = Args.getLastArg(OPT_meabi)) {
2561    StringRef Value = A->getValue();
2562    llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
2563                                 .Case("default", llvm::EABI::Default)
2564                                 .Case("4", llvm::EABI::EABI4)
2565                                 .Case("5", llvm::EABI::EABI5)
2566                                 .Case("gnu", llvm::EABI::GNU)
2567                                 .Default(llvm::EABI::Unknown);
2568    if (EABIVersion == llvm::EABI::Unknown)
2569      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2570                                                << Value;
2571    else
2572      Opts.EABIVersion = EABIVersion;
2573  }
2574  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2575  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
2576  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2577  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2578  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2579  Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
2580  // Use the default target triple if unspecified.
2581  if (Opts.Triple.empty())
2582    Opts.Triple = llvm::sys::getDefaultTargetTriple();
2583  Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
2584}
2585
2586bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2587                                        const char *const *ArgBegin,
2588                                        const char *const *ArgEnd,
2589                                        DiagnosticsEngine &Diags) {
2590  bool Success = true;
2591
2592  // Parse the arguments.
2593  std::unique_ptr<OptTable> Opts = createDriverOptTable();
2594  const unsigned IncludedFlagsBitmask = options::CC1Option;
2595  unsigned MissingArgIndex, MissingArgCount;
2596  InputArgList Args =
2597      Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
2598                      MissingArgCount, IncludedFlagsBitmask);
2599  LangOptions &LangOpts = *Res.getLangOpts();
2600
2601  // Check for missing argument error.
2602  if (MissingArgCount) {
2603    Diags.Report(diag::err_drv_missing_argument)
2604        << Args.getArgString(MissingArgIndex) << MissingArgCount;
2605    Success = false;
2606  }
2607
2608  // Issue errors on unknown arguments.
2609  for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
2610    Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
2611    Success = false;
2612  }
2613
2614  Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
2615  Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
2616  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
2617  Success &=
2618      ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
2619                          false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
2620  ParseCommentArgs(LangOpts.CommentOpts, Args);
2621  ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
2622  // FIXME: We shouldn't have to pass the DashX option around here
2623  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
2624                                      LangOpts.IsHeaderFile);
2625  ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
2626  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
2627                              Res.getTargetOpts());
2628  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
2629                        Res.getFileSystemOpts().WorkingDir);
2630  if (DashX.getFormat() == InputKind::Precompiled ||
2631      DashX.getLanguage() == InputKind::LLVM_IR) {
2632    // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
2633    // PassManager in BackendUtil.cpp. They need to be initializd no matter
2634    // what the input type is.
2635    if (Args.hasArg(OPT_fobjc_arc))
2636      LangOpts.ObjCAutoRefCount = 1;
2637    // PIClevel and PIELevel are needed during code generation and this should be
2638    // set regardless of the input type.
2639    LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2640    LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
2641    parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2642                        Diags, LangOpts.Sanitize);
2643  } else {
2644    // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
2645    // FIXME: Should we really be calling this for an InputKind::Asm input?
2646    ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
2647                  Res.getPreprocessorOpts(), Diags);
2648    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2649      LangOpts.ObjCExceptions = 1;
2650  }
2651
2652  if (LangOpts.CUDA) {
2653    // During CUDA device-side compilation, the aux triple is the
2654    // triple used for host compilation.
2655    if (LangOpts.CUDAIsDevice)
2656      Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2657  }
2658
2659  // Set the triple of the host for OpenMP device compile.
2660  if (LangOpts.OpenMPIsDevice)
2661    Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2662
2663  // FIXME: Override value name discarding when asan or msan is used because the
2664  // backend passes depend on the name of the alloca in order to print out
2665  // names.
2666  Res.getCodeGenOpts().DiscardValueNames &=
2667      !LangOpts.Sanitize.has(SanitizerKind::Address) &&
2668      !LangOpts.Sanitize.has(SanitizerKind::Memory);
2669
2670  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2671  // PCH file and find the original header name. Remove the need to do that in
2672  // ParsePreprocessorArgs and remove the FileManager
2673  // parameters from the function and the "FileManager.h" #include.
2674  FileManager FileMgr(Res.getFileSystemOpts());
2675  ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags,
2676                        Res.getFrontendOpts().ProgramAction);
2677  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
2678                              Res.getFrontendOpts().ProgramAction);
2679
2680  // Turn on -Wspir-compat for SPIR target.
2681  llvm::Triple T(Res.getTargetOpts().Triple);
2682  auto Arch = T.getArch();
2683  if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
2684    Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
2685  }
2686  return Success;
2687}
2688
2689std::string CompilerInvocation::getModuleHash() const {
2690  // Note: For QoI reasons, the things we use as a hash here should all be
2691  // dumped via the -module-info flag.
2692  using llvm::hash_code;
2693  using llvm::hash_value;
2694  using llvm::hash_combine;
2695
2696  // Start the signature with the compiler version.
2697  // FIXME: We'd rather use something more cryptographically sound than
2698  // CityHash, but this will do for now.
2699  hash_code code = hash_value(getClangFullRepositoryVersion());
2700
2701  // Extend the signature with the language options
2702#define LANGOPT(Name, Bits, Default, Description) \
2703   code = hash_combine(code, LangOpts->Name);
2704#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2705  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
2706#define BENIGN_LANGOPT(Name, Bits, Default, Description)
2707#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2708#include "clang/Basic/LangOptions.def"
2709
2710  for (StringRef Feature : LangOpts->ModuleFeatures)
2711    code = hash_combine(code, Feature);
2712
2713  // Extend the signature with the target options.
2714  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
2715                      TargetOpts->ABI);
2716  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
2717    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
2718
2719  // Extend the signature with preprocessor options.
2720  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
2721  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
2722  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
2723
2724  for (std::vector<std::pair<std::string, bool/*isUndef*/>>::const_iterator
2725            I = getPreprocessorOpts().Macros.begin(),
2726         IEnd = getPreprocessorOpts().Macros.end();
2727       I != IEnd; ++I) {
2728    // If we're supposed to ignore this macro for the purposes of modules,
2729    // don't put it into the hash.
2730    if (!hsOpts.ModulesIgnoreMacros.empty()) {
2731      // Check whether we're ignoring this macro.
2732      StringRef MacroDef = I->first;
2733      if (hsOpts.ModulesIgnoreMacros.count(
2734              llvm::CachedHashString(MacroDef.split('=').first)))
2735        continue;
2736    }
2737
2738    code = hash_combine(code, I->first, I->second);
2739  }
2740
2741  // Extend the signature with the sysroot and other header search options.
2742  code = hash_combine(code, hsOpts.Sysroot,
2743                      hsOpts.ModuleFormat,
2744                      hsOpts.UseDebugInfo,
2745                      hsOpts.UseBuiltinIncludes,
2746                      hsOpts.UseStandardSystemIncludes,
2747                      hsOpts.UseStandardCXXIncludes,
2748                      hsOpts.UseLibcxx,
2749                      hsOpts.ModulesValidateDiagnosticOptions);
2750  code = hash_combine(code, hsOpts.ResourceDir);
2751
2752  // Extend the signature with the user build path.
2753  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2754
2755  // Extend the signature with the module file extensions.
2756  const FrontendOptions &frontendOpts = getFrontendOpts();
2757  for (const auto &ext : frontendOpts.ModuleFileExtensions) {
2758    code = ext->hashExtension(code);
2759  }
2760
2761  // Extend the signature with the enabled sanitizers, if at least one is
2762  // enabled. Sanitizers which cannot affect AST generation aren't hashed.
2763  SanitizerSet SanHash = LangOpts->Sanitize;
2764  SanHash.clear(getPPTransparentSanitizers());
2765  if (!SanHash.empty())
2766    code = hash_combine(code, SanHash.Mask);
2767
2768  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2769}
2770
2771namespace clang {
2772
2773template<typename IntTy>
2774static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2775                                    IntTy Default,
2776                                    DiagnosticsEngine *Diags) {
2777  IntTy Res = Default;
2778  if (Arg *A = Args.getLastArg(Id)) {
2779    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2780      if (Diags)
2781        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2782                                                       << A->getValue();
2783    }
2784  }
2785  return Res;
2786}
2787
2788
2789// Declared in clang/Frontend/Utils.h.
2790int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2791                       DiagnosticsEngine *Diags) {
2792  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2793}
2794
2795uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2796                               uint64_t Default,
2797                               DiagnosticsEngine *Diags) {
2798  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2799}
2800
2801void BuryPointer(const void *Ptr) {
2802  // This function may be called only a small fixed amount of times per each
2803  // invocation, otherwise we do actually have a leak which we want to report.
2804  // If this function is called more than kGraveYardMaxSize times, the pointers
2805  // will not be properly buried and a leak detector will report a leak, which
2806  // is what we want in such case.
2807  static const size_t kGraveYardMaxSize = 16;
2808  LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2809  static std::atomic<unsigned> GraveYardSize;
2810  unsigned Idx = GraveYardSize++;
2811  if (Idx >= kGraveYardMaxSize)
2812    return;
2813  GraveYard[Idx] = Ptr;
2814}
2815
2816IntrusiveRefCntPtr<vfs::FileSystem>
2817createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2818                                DiagnosticsEngine &Diags) {
2819  return createVFSFromCompilerInvocation(CI, Diags, vfs::getRealFileSystem());
2820}
2821
2822IntrusiveRefCntPtr<vfs::FileSystem>
2823createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2824                                DiagnosticsEngine &Diags,
2825                                IntrusiveRefCntPtr<vfs::FileSystem> BaseFS) {
2826  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2827    return BaseFS;
2828
2829  IntrusiveRefCntPtr<vfs::OverlayFileSystem> Overlay(
2830      new vfs::OverlayFileSystem(BaseFS));
2831  // earlier vfs files are on the bottom
2832  for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2833    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2834        BaseFS->getBufferForFile(File);
2835    if (!Buffer) {
2836      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2837      return IntrusiveRefCntPtr<vfs::FileSystem>();
2838    }
2839
2840    IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getVFSFromYAML(
2841        std::move(Buffer.get()), /*DiagHandler*/ nullptr, File);
2842    if (!FS.get()) {
2843      Diags.Report(diag::err_invalid_vfs_overlay) << File;
2844      return IntrusiveRefCntPtr<vfs::FileSystem>();
2845    }
2846    Overlay->pushOverlay(FS);
2847  }
2848  return Overlay;
2849}
2850} // end namespace clang
2851