CompilerInvocation.cpp revision 344779 
1//===- CompilerInvocation.cpp ---------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Frontend/CompilerInvocation.h"
11#include "TestModuleFileExtension.h"
12#include "clang/Basic/Builtins.h"
13#include "clang/Basic/CharInfo.h"
14#include "clang/Basic/CodeGenOptions.h"
15#include "clang/Basic/CommentOptions.h"
16#include "clang/Basic/DebugInfoOptions.h"
17#include "clang/Basic/Diagnostic.h"
18#include "clang/Basic/DiagnosticOptions.h"
19#include "clang/Basic/FileSystemOptions.h"
20#include "clang/Basic/LLVM.h"
21#include "clang/Basic/LangOptions.h"
22#include "clang/Basic/ObjCRuntime.h"
23#include "clang/Basic/Sanitizers.h"
24#include "clang/Basic/SourceLocation.h"
25#include "clang/Basic/TargetOptions.h"
26#include "clang/Basic/Version.h"
27#include "clang/Basic/Visibility.h"
28#include "clang/Basic/XRayInstr.h"
29#include "clang/Config/config.h"
30#include "clang/Driver/DriverDiagnostic.h"
31#include "clang/Driver/Options.h"
32#include "clang/Frontend/CommandLineSourceLoc.h"
33#include "clang/Frontend/DependencyOutputOptions.h"
34#include "clang/Frontend/FrontendDiagnostic.h"
35#include "clang/Frontend/FrontendOptions.h"
36#include "clang/Frontend/FrontendPluginRegistry.h"
37#include "clang/Frontend/LangStandard.h"
38#include "clang/Frontend/MigratorOptions.h"
39#include "clang/Frontend/PreprocessorOutputOptions.h"
40#include "clang/Frontend/Utils.h"
41#include "clang/Lex/HeaderSearchOptions.h"
42#include "clang/Lex/PreprocessorOptions.h"
43#include "clang/Sema/CodeCompleteOptions.h"
44#include "clang/Serialization/ModuleFileExtension.h"
45#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
46#include "llvm/ADT/APInt.h"
47#include "llvm/ADT/ArrayRef.h"
48#include "llvm/ADT/CachedHashString.h"
49#include "llvm/ADT/Hashing.h"
50#include "llvm/ADT/None.h"
51#include "llvm/ADT/Optional.h"
52#include "llvm/ADT/SmallString.h"
53#include "llvm/ADT/SmallVector.h"
54#include "llvm/ADT/StringRef.h"
55#include "llvm/ADT/StringSwitch.h"
56#include "llvm/ADT/Triple.h"
57#include "llvm/ADT/Twine.h"
58#include "llvm/IR/DebugInfoMetadata.h"
59#include "llvm/Linker/Linker.h"
60#include "llvm/MC/MCTargetOptions.h"
61#include "llvm/Option/Arg.h"
62#include "llvm/Option/ArgList.h"
63#include "llvm/Option/OptSpecifier.h"
64#include "llvm/Option/OptTable.h"
65#include "llvm/Option/Option.h"
66#include "llvm/ProfileData/InstrProfReader.h"
67#include "llvm/Support/CodeGen.h"
68#include "llvm/Support/Compiler.h"
69#include "llvm/Support/Error.h"
70#include "llvm/Support/ErrorHandling.h"
71#include "llvm/Support/ErrorOr.h"
72#include "llvm/Support/FileSystem.h"
73#include "llvm/Support/Host.h"
74#include "llvm/Support/MathExtras.h"
75#include "llvm/Support/MemoryBuffer.h"
76#include "llvm/Support/Path.h"
77#include "llvm/Support/Process.h"
78#include "llvm/Support/Regex.h"
79#include "llvm/Support/VersionTuple.h"
80#include "llvm/Support/VirtualFileSystem.h"
81#include "llvm/Support/raw_ostream.h"
82#include "llvm/Target/TargetOptions.h"
83#include <algorithm>
84#include <atomic>
85#include <cassert>
86#include <cstddef>
87#include <cstring>
88#include <memory>
89#include <string>
90#include <tuple>
91#include <utility>
92#include <vector>
93
94using namespace clang;
95using namespace driver;
96using namespace options;
97using namespace llvm::opt;
98
99//===----------------------------------------------------------------------===//
100// Initialization.
101//===----------------------------------------------------------------------===//
102
103CompilerInvocationBase::CompilerInvocationBase()
104    : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
105      DiagnosticOpts(new DiagnosticOptions()),
106      HeaderSearchOpts(new HeaderSearchOptions()),
107      PreprocessorOpts(new PreprocessorOptions()) {}
108
109CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
110    : LangOpts(new LangOptions(*X.getLangOpts())),
111      TargetOpts(new TargetOptions(X.getTargetOpts())),
112      DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
113      HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
114      PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
115
116CompilerInvocationBase::~CompilerInvocationBase() = default;
117
118//===----------------------------------------------------------------------===//
119// Deserialization (from args)
120//===----------------------------------------------------------------------===//
121
122static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
123                                     DiagnosticsEngine &Diags) {
124  unsigned DefaultOpt = llvm::CodeGenOpt::None;
125  if (IK.getLanguage() == InputKind::OpenCL && !Args.hasArg(OPT_cl_opt_disable))
126    DefaultOpt = llvm::CodeGenOpt::Default;
127
128  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
129    if (A->getOption().matches(options::OPT_O0))
130      return llvm::CodeGenOpt::None;
131
132    if (A->getOption().matches(options::OPT_Ofast))
133      return llvm::CodeGenOpt::Aggressive;
134
135    assert(A->getOption().matches(options::OPT_O));
136
137    StringRef S(A->getValue());
138    if (S == "s" || S == "z" || S.empty())
139      return llvm::CodeGenOpt::Default;
140
141    if (S == "g")
142      return llvm::CodeGenOpt::Less;
143
144    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
145  }
146
147  return DefaultOpt;
148}
149
150static unsigned getOptimizationLevelSize(ArgList &Args) {
151  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
152    if (A->getOption().matches(options::OPT_O)) {
153      switch (A->getValue()[0]) {
154      default:
155        return 0;
156      case 's':
157        return 1;
158      case 'z':
159        return 2;
160      }
161    }
162  }
163  return 0;
164}
165
166static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
167                              OptSpecifier GroupWithValue,
168                              std::vector<std::string> &Diagnostics) {
169  for (auto *A : Args.filtered(Group)) {
170    if (A->getOption().getKind() == Option::FlagClass) {
171      // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
172      // its name (minus the "W" or "R" at the beginning) to the warning list.
173      Diagnostics.push_back(A->getOption().getName().drop_front(1));
174    } else if (A->getOption().matches(GroupWithValue)) {
175      // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
176      Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
177    } else {
178      // Otherwise, add its value (for OPT_W_Joined and similar).
179      for (const auto *Arg : A->getValues())
180        Diagnostics.emplace_back(Arg);
181    }
182  }
183}
184
185// Parse the Static Analyzer configuration. If \p Diags is set to nullptr,
186// it won't verify the input.
187static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
188                                 DiagnosticsEngine *Diags);
189
190static void getAllNoBuiltinFuncValues(ArgList &Args,
191                                      std::vector<std::string> &Funcs) {
192  SmallVector<const char *, 8> Values;
193  for (const auto &Arg : Args) {
194    const Option &O = Arg->getOption();
195    if (O.matches(options::OPT_fno_builtin_)) {
196      const char *FuncName = Arg->getValue();
197      if (Builtin::Context::isBuiltinFunc(FuncName))
198        Values.push_back(FuncName);
199    }
200  }
201  Funcs.insert(Funcs.end(), Values.begin(), Values.end());
202}
203
204static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
205                              DiagnosticsEngine &Diags) {
206  bool Success = true;
207  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
208    StringRef Name = A->getValue();
209    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
210#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
211      .Case(CMDFLAG, NAME##Model)
212#include "clang/StaticAnalyzer/Core/Analyses.def"
213      .Default(NumStores);
214    if (Value == NumStores) {
215      Diags.Report(diag::err_drv_invalid_value)
216        << A->getAsString(Args) << Name;
217      Success = false;
218    } else {
219      Opts.AnalysisStoreOpt = Value;
220    }
221  }
222
223  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
224    StringRef Name = A->getValue();
225    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
226#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
227      .Case(CMDFLAG, NAME##Model)
228#include "clang/StaticAnalyzer/Core/Analyses.def"
229      .Default(NumConstraints);
230    if (Value == NumConstraints) {
231      Diags.Report(diag::err_drv_invalid_value)
232        << A->getAsString(Args) << Name;
233      Success = false;
234    } else {
235      Opts.AnalysisConstraintsOpt = Value;
236    }
237  }
238
239  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
240    StringRef Name = A->getValue();
241    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
242#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
243      .Case(CMDFLAG, PD_##NAME)
244#include "clang/StaticAnalyzer/Core/Analyses.def"
245      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
246    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
247      Diags.Report(diag::err_drv_invalid_value)
248        << A->getAsString(Args) << Name;
249      Success = false;
250    } else {
251      Opts.AnalysisDiagOpt = Value;
252    }
253  }
254
255  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
256    StringRef Name = A->getValue();
257    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
258#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
259      .Case(CMDFLAG, NAME)
260#include "clang/StaticAnalyzer/Core/Analyses.def"
261      .Default(NumPurgeModes);
262    if (Value == NumPurgeModes) {
263      Diags.Report(diag::err_drv_invalid_value)
264        << A->getAsString(Args) << Name;
265      Success = false;
266    } else {
267      Opts.AnalysisPurgeOpt = Value;
268    }
269  }
270
271  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
272    StringRef Name = A->getValue();
273    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
274#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
275      .Case(CMDFLAG, NAME)
276#include "clang/StaticAnalyzer/Core/Analyses.def"
277      .Default(NumInliningModes);
278    if (Value == NumInliningModes) {
279      Diags.Report(diag::err_drv_invalid_value)
280        << A->getAsString(Args) << Name;
281      Success = false;
282    } else {
283      Opts.InliningMode = Value;
284    }
285  }
286
287  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
288  Opts.ShowConfigOptionsList = Args.hasArg(OPT_analyzer_config_help);
289  Opts.ShowEnabledCheckerList = Args.hasArg(OPT_analyzer_list_enabled_checkers);
290  Opts.ShouldEmitErrorsOnInvalidConfigValue =
291      /* negated */!llvm::StringSwitch<bool>(
292                   Args.getLastArgValue(OPT_analyzer_config_compatibility_mode))
293        .Case("true", true)
294        .Case("false", false)
295        .Default(false);
296  Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
297
298  Opts.visualizeExplodedGraphWithGraphViz =
299    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
300  Opts.DumpExplodedGraphTo = Args.getLastArgValue(OPT_analyzer_dump_egraph);
301  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
302  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
303  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
304  Opts.AnalyzeNestedBlocks =
305    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
306  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
307  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
308  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
309  Opts.maxBlockVisitOnPath =
310      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
311  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
312  Opts.InlineMaxStackDepth =
313      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
314                         Opts.InlineMaxStackDepth, Diags);
315
316  Opts.CheckersControlList.clear();
317  for (const Arg *A :
318       Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
319    A->claim();
320    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
321    // We can have a list of comma separated checker names, e.g:
322    // '-analyzer-checker=cocoa,unix'
323    StringRef checkerList = A->getValue();
324    SmallVector<StringRef, 4> checkers;
325    checkerList.split(checkers, ",");
326    for (auto checker : checkers)
327      Opts.CheckersControlList.emplace_back(checker, enable);
328  }
329
330  // Go through the analyzer configuration options.
331  for (const auto *A : Args.filtered(OPT_analyzer_config)) {
332
333    // We can have a list of comma separated config names, e.g:
334    // '-analyzer-config key1=val1,key2=val2'
335    StringRef configList = A->getValue();
336    SmallVector<StringRef, 4> configVals;
337    configList.split(configVals, ",");
338    for (const auto &configVal : configVals) {
339      StringRef key, val;
340      std::tie(key, val) = configVal.split("=");
341      if (val.empty()) {
342        Diags.Report(SourceLocation(),
343                     diag::err_analyzer_config_no_value) << configVal;
344        Success = false;
345        break;
346      }
347      if (val.find('=') != StringRef::npos) {
348        Diags.Report(SourceLocation(),
349                     diag::err_analyzer_config_multiple_values)
350          << configVal;
351        Success = false;
352        break;
353      }
354
355      // TODO: Check checker options too, possibly in CheckerRegistry.
356      // Leave unknown non-checker configs unclaimed.
357      if (!key.contains(":") && Opts.isUnknownAnalyzerConfig(key)) {
358        if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
359          Diags.Report(diag::err_analyzer_config_unknown) << key;
360        continue;
361      }
362
363      A->claim();
364      Opts.Config[key] = val;
365    }
366  }
367
368  if (Opts.ShouldEmitErrorsOnInvalidConfigValue)
369    parseAnalyzerConfigs(Opts, &Diags);
370  else
371    parseAnalyzerConfigs(Opts, nullptr);
372
373  llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
374  for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
375    if (i != 0)
376      os << " ";
377    os << Args.getArgString(i);
378  }
379  os.flush();
380
381  return Success;
382}
383
384static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
385                                 StringRef OptionName, StringRef DefaultVal) {
386  return Config.insert({OptionName, DefaultVal}).first->second;
387}
388
389static void initOption(AnalyzerOptions::ConfigTable &Config,
390                       DiagnosticsEngine *Diags,
391                       StringRef &OptionField, StringRef Name,
392                       StringRef DefaultVal) {
393  // String options may be known to invalid (e.g. if the expected string is a
394  // file name, but the file does not exist), those will have to be checked in
395  // parseConfigs.
396  OptionField = getStringOption(Config, Name, DefaultVal);
397}
398
399static void initOption(AnalyzerOptions::ConfigTable &Config,
400                       DiagnosticsEngine *Diags,
401                       bool &OptionField, StringRef Name, bool DefaultVal) {
402  auto PossiblyInvalidVal = llvm::StringSwitch<Optional<bool>>(
403                 getStringOption(Config, Name, (DefaultVal ? "true" : "false")))
404      .Case("true", true)
405      .Case("false", false)
406      .Default(None);
407
408  if (!PossiblyInvalidVal) {
409    if (Diags)
410      Diags->Report(diag::err_analyzer_config_invalid_input)
411        << Name << "a boolean";
412    else
413      OptionField = DefaultVal;
414  } else
415    OptionField = PossiblyInvalidVal.getValue();
416}
417
418static void initOption(AnalyzerOptions::ConfigTable &Config,
419                       DiagnosticsEngine *Diags,
420                       unsigned &OptionField, StringRef Name,
421                       unsigned DefaultVal) {
422
423  OptionField = DefaultVal;
424  bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
425                     .getAsInteger(10, OptionField);
426  if (Diags && HasFailed)
427    Diags->Report(diag::err_analyzer_config_invalid_input)
428      << Name << "an unsigned";
429}
430
431static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
432                                 DiagnosticsEngine *Diags) {
433  // TODO: There's no need to store the entire configtable, it'd be plenty
434  // enough tostore checker options.
435
436#define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL)                \
437  initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);
438
439#define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC,        \
440                                           SHALLOW_VAL, DEEP_VAL)              \
441  switch (AnOpts.getUserMode()) {                                              \
442  case UMK_Shallow:                                                            \
443    initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, SHALLOW_VAL);       \
444    break;                                                                     \
445  case UMK_Deep:                                                               \
446    initOption(AnOpts.Config, Diags, AnOpts.NAME, CMDFLAG, DEEP_VAL);          \
447    break;                                                                     \
448  }                                                                            \
449
450#include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
451#undef ANALYZER_OPTION
452#undef ANALYZER_OPTION_DEPENDS_ON_USER_MODE
453
454  // At this point, AnalyzerOptions is configured. Let's validate some options.
455
456  if (!Diags)
457    return;
458
459  if (!AnOpts.CTUDir.empty() && !llvm::sys::fs::is_directory(AnOpts.CTUDir))
460    Diags->Report(diag::err_analyzer_config_invalid_input) << "ctu-dir"
461                                                           << "a filename";
462
463  if (!AnOpts.ModelPath.empty() &&
464      !llvm::sys::fs::is_directory(AnOpts.ModelPath))
465    Diags->Report(diag::err_analyzer_config_invalid_input) << "model-path"
466                                                           << "a filename";
467}
468
469static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
470  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
471  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
472  return true;
473}
474
475static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
476  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
477  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
478}
479
480static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
481  if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
482    StringRef Value = A->getValue();
483    if (Value == "small" || Value == "kernel" || Value == "medium" ||
484        Value == "large" || Value == "tiny")
485      return Value;
486    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
487  }
488  return "default";
489}
490
491static llvm::Reloc::Model getRelocModel(ArgList &Args,
492                                        DiagnosticsEngine &Diags) {
493  if (Arg *A = Args.getLastArg(OPT_mrelocation_model)) {
494    StringRef Value = A->getValue();
495    auto RM = llvm::StringSwitch<llvm::Optional<llvm::Reloc::Model>>(Value)
496                  .Case("static", llvm::Reloc::Static)
497                  .Case("pic", llvm::Reloc::PIC_)
498                  .Case("ropi", llvm::Reloc::ROPI)
499                  .Case("rwpi", llvm::Reloc::RWPI)
500                  .Case("ropi-rwpi", llvm::Reloc::ROPI_RWPI)
501                  .Case("dynamic-no-pic", llvm::Reloc::DynamicNoPIC)
502                  .Default(None);
503    if (RM.hasValue())
504      return *RM;
505    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
506  }
507  return llvm::Reloc::PIC_;
508}
509
510/// Create a new Regex instance out of the string value in \p RpassArg.
511/// It returns a pointer to the newly generated Regex instance.
512static std::shared_ptr<llvm::Regex>
513GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
514                                Arg *RpassArg) {
515  StringRef Val = RpassArg->getValue();
516  std::string RegexError;
517  std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
518  if (!Pattern->isValid(RegexError)) {
519    Diags.Report(diag::err_drv_optimization_remark_pattern)
520        << RegexError << RpassArg->getAsString(Args);
521    Pattern.reset();
522  }
523  return Pattern;
524}
525
526static bool parseDiagnosticLevelMask(StringRef FlagName,
527                                     const std::vector<std::string> &Levels,
528                                     DiagnosticsEngine *Diags,
529                                     DiagnosticLevelMask &M) {
530  bool Success = true;
531  for (const auto &Level : Levels) {
532    DiagnosticLevelMask const PM =
533      llvm::StringSwitch<DiagnosticLevelMask>(Level)
534        .Case("note",    DiagnosticLevelMask::Note)
535        .Case("remark",  DiagnosticLevelMask::Remark)
536        .Case("warning", DiagnosticLevelMask::Warning)
537        .Case("error",   DiagnosticLevelMask::Error)
538        .Default(DiagnosticLevelMask::None);
539    if (PM == DiagnosticLevelMask::None) {
540      Success = false;
541      if (Diags)
542        Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
543    }
544    M = M | PM;
545  }
546  return Success;
547}
548
549static void parseSanitizerKinds(StringRef FlagName,
550                                const std::vector<std::string> &Sanitizers,
551                                DiagnosticsEngine &Diags, SanitizerSet &S) {
552  for (const auto &Sanitizer : Sanitizers) {
553    SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
554    if (K == 0)
555      Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
556    else
557      S.set(K, true);
558  }
559}
560
561static void parseXRayInstrumentationBundle(StringRef FlagName, StringRef Bundle,
562                                           ArgList &Args, DiagnosticsEngine &D,
563                                           XRayInstrSet &S) {
564  llvm::SmallVector<StringRef, 2> BundleParts;
565  llvm::SplitString(Bundle, BundleParts, ",");
566  for (const auto B : BundleParts) {
567    auto Mask = parseXRayInstrValue(B);
568    if (Mask == XRayInstrKind::None)
569      if (B != "none")
570        D.Report(diag::err_drv_invalid_value) << FlagName << Bundle;
571      else
572        S.Mask = Mask;
573    else if (Mask == XRayInstrKind::All)
574      S.Mask = Mask;
575    else
576      S.set(Mask, true);
577  }
578}
579
580// Set the profile kind for fprofile-instrument.
581static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
582                               DiagnosticsEngine &Diags) {
583  Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
584  if (A == nullptr)
585    return;
586  StringRef S = A->getValue();
587  unsigned I = llvm::StringSwitch<unsigned>(S)
588                   .Case("none", CodeGenOptions::ProfileNone)
589                   .Case("clang", CodeGenOptions::ProfileClangInstr)
590                   .Case("llvm", CodeGenOptions::ProfileIRInstr)
591                   .Default(~0U);
592  if (I == ~0U) {
593    Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
594                                                         << S;
595    return;
596  }
597  auto Instrumentor = static_cast<CodeGenOptions::ProfileInstrKind>(I);
598  Opts.setProfileInstr(Instrumentor);
599}
600
601// Set the profile kind using fprofile-instrument-use-path.
602static void setPGOUseInstrumentor(CodeGenOptions &Opts,
603                                  const Twine &ProfileName) {
604  auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
605  // In error, return silently and let Clang PGOUse report the error message.
606  if (auto E = ReaderOrErr.takeError()) {
607    llvm::consumeError(std::move(E));
608    Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
609    return;
610  }
611  std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
612    std::move(ReaderOrErr.get());
613  if (PGOReader->isIRLevelProfile())
614    Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
615  else
616    Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
617}
618
619static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
620                             DiagnosticsEngine &Diags,
621                             const TargetOptions &TargetOpts,
622                             const FrontendOptions &FrontendOpts) {
623  bool Success = true;
624  llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
625
626  unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
627  // TODO: This could be done in Driver
628  unsigned MaxOptLevel = 3;
629  if (OptimizationLevel > MaxOptLevel) {
630    // If the optimization level is not supported, fall back on the default
631    // optimization
632    Diags.Report(diag::warn_drv_optimization_value)
633        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
634    OptimizationLevel = MaxOptLevel;
635  }
636  Opts.OptimizationLevel = OptimizationLevel;
637
638  // At O0 we want to fully disable inlining outside of cases marked with
639  // 'alwaysinline' that are required for correctness.
640  Opts.setInlining((Opts.OptimizationLevel == 0)
641                       ? CodeGenOptions::OnlyAlwaysInlining
642                       : CodeGenOptions::NormalInlining);
643  // Explicit inlining flags can disable some or all inlining even at
644  // optimization levels above zero.
645  if (Arg *InlineArg = Args.getLastArg(
646          options::OPT_finline_functions, options::OPT_finline_hint_functions,
647          options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
648    if (Opts.OptimizationLevel > 0) {
649      const Option &InlineOpt = InlineArg->getOption();
650      if (InlineOpt.matches(options::OPT_finline_functions))
651        Opts.setInlining(CodeGenOptions::NormalInlining);
652      else if (InlineOpt.matches(options::OPT_finline_hint_functions))
653        Opts.setInlining(CodeGenOptions::OnlyHintInlining);
654      else
655        Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
656    }
657  }
658
659  Opts.ExperimentalNewPassManager = Args.hasFlag(
660      OPT_fexperimental_new_pass_manager, OPT_fno_experimental_new_pass_manager,
661      /* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER);
662
663  Opts.DebugPassManager =
664      Args.hasFlag(OPT_fdebug_pass_manager, OPT_fno_debug_pass_manager,
665                   /* Default */ false);
666
667  if (Arg *A = Args.getLastArg(OPT_fveclib)) {
668    StringRef Name = A->getValue();
669    if (Name == "Accelerate")
670      Opts.setVecLib(CodeGenOptions::Accelerate);
671    else if (Name == "SVML")
672      Opts.setVecLib(CodeGenOptions::SVML);
673    else if (Name == "none")
674      Opts.setVecLib(CodeGenOptions::NoLibrary);
675    else
676      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
677  }
678
679  if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
680    unsigned Val =
681        llvm::StringSwitch<unsigned>(A->getValue())
682            .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
683            .Case("line-directives-only", codegenoptions::DebugDirectivesOnly)
684            .Case("limited", codegenoptions::LimitedDebugInfo)
685            .Case("standalone", codegenoptions::FullDebugInfo)
686            .Default(~0U);
687    if (Val == ~0U)
688      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
689                                                << A->getValue();
690    else
691      Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
692  }
693  if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
694    unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
695                       .Case("gdb", unsigned(llvm::DebuggerKind::GDB))
696                       .Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
697                       .Case("sce", unsigned(llvm::DebuggerKind::SCE))
698                       .Default(~0U);
699    if (Val == ~0U)
700      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
701                                                << A->getValue();
702    else
703      Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
704  }
705  Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
706  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
707  Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
708  Opts.CodeViewGHash = Args.hasArg(OPT_gcodeview_ghash);
709  Opts.MacroDebugInfo = Args.hasArg(OPT_debug_info_macro);
710  Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
711  Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
712  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
713  Opts.SplitDwarfInlining = !Args.hasArg(OPT_fno_split_dwarf_inlining);
714
715  if (Arg *A =
716          Args.getLastArg(OPT_enable_split_dwarf, OPT_enable_split_dwarf_EQ)) {
717    if (A->getOption().matches(options::OPT_enable_split_dwarf)) {
718      Opts.setSplitDwarfMode(CodeGenOptions::SplitFileFission);
719    } else {
720      StringRef Name = A->getValue();
721      if (Name == "single")
722        Opts.setSplitDwarfMode(CodeGenOptions::SingleFileFission);
723      else if (Name == "split")
724        Opts.setSplitDwarfMode(CodeGenOptions::SplitFileFission);
725      else
726        Diags.Report(diag::err_drv_invalid_value)
727            << A->getAsString(Args) << Name;
728    }
729  }
730
731  Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
732  Opts.DebugExplicitImport = Args.hasArg(OPT_dwarf_explicit_import);
733  Opts.DebugFwdTemplateParams = Args.hasArg(OPT_debug_forward_template_params);
734  Opts.EmbedSource = Args.hasArg(OPT_gembed_source);
735
736  for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
737    Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
738
739  if (const Arg *A =
740          Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
741    Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
742
743  Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
744  Opts.DisableLifetimeMarkers = Args.hasArg(OPT_disable_lifetimemarkers);
745  Opts.DisableO0ImplyOptNone = Args.hasArg(OPT_disable_O0_optnone);
746  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
747  Opts.IndirectTlsSegRefs = Args.hasArg(OPT_mno_tls_direct_seg_refs);
748  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
749  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
750    OPT_fuse_register_sized_bitfield_access);
751  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
752  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
753  Opts.NewStructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa) &&
754                           Args.hasArg(OPT_new_struct_path_tbaa);
755  Opts.FineGrainedBitfieldAccesses =
756      Args.hasFlag(OPT_ffine_grained_bitfield_accesses,
757                   OPT_fno_fine_grained_bitfield_accesses, false);
758  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
759  Opts.RecordCommandLine = Args.getLastArgValue(OPT_record_command_line);
760  Opts.MergeAllConstants = Args.hasArg(OPT_fmerge_all_constants);
761  Opts.NoCommon = Args.hasArg(OPT_fno_common);
762  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
763  Opts.OptimizeSize = getOptimizationLevelSize(Args);
764  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
765                            Args.hasArg(OPT_ffreestanding));
766  if (Opts.SimplifyLibCalls)
767    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
768  Opts.UnrollLoops =
769      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
770                   (Opts.OptimizationLevel > 1));
771  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
772
773  Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
774  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
775  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
776  Opts.DebugInfoForProfiling = Args.hasFlag(
777      OPT_fdebug_info_for_profiling, OPT_fno_debug_info_for_profiling, false);
778  Opts.DebugNameTable = static_cast<unsigned>(
779      Args.hasArg(OPT_ggnu_pubnames)
780          ? llvm::DICompileUnit::DebugNameTableKind::GNU
781          : Args.hasArg(OPT_gpubnames)
782                ? llvm::DICompileUnit::DebugNameTableKind::Default
783                : llvm::DICompileUnit::DebugNameTableKind::None);
784  Opts.DebugRangesBaseAddress = Args.hasArg(OPT_fdebug_ranges_base_address);
785
786  setPGOInstrumentor(Opts, Args, Diags);
787  Opts.InstrProfileOutput =
788      Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
789  Opts.ProfileInstrumentUsePath =
790      Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
791  if (!Opts.ProfileInstrumentUsePath.empty())
792    setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
793  Opts.ProfileRemappingFile =
794      Args.getLastArgValue(OPT_fprofile_remapping_file_EQ);
795  if (!Opts.ProfileRemappingFile.empty() && !Opts.ExperimentalNewPassManager) {
796    Diags.Report(diag::err_drv_argument_only_allowed_with)
797      << Args.getLastArg(OPT_fprofile_remapping_file_EQ)->getAsString(Args)
798      << "-fexperimental-new-pass-manager";
799  }
800
801  Opts.CoverageMapping =
802      Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
803  Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
804  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
805  Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
806  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
807  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
808  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
809  Opts.RegisterGlobalDtorsWithAtExit =
810      Args.hasArg(OPT_fregister_global_dtors_with_atexit);
811  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
812  Opts.CodeModel = TargetOpts.CodeModel;
813  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
814  Opts.DisableFPElim =
815      (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
816  Opts.DisableFree = Args.hasArg(OPT_disable_free);
817  Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
818  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
819  Opts.NoEscapingBlockTailCalls =
820      Args.hasArg(OPT_fno_escaping_block_tail_calls);
821  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
822  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable) ||
823                          Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
824                          Args.hasArg(OPT_cl_fast_relaxed_math);
825  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
826  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
827                       Args.hasArg(OPT_cl_finite_math_only) ||
828                       Args.hasArg(OPT_cl_fast_relaxed_math));
829  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
830                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
831                       Args.hasArg(OPT_cl_finite_math_only) ||
832                       Args.hasArg(OPT_cl_fast_relaxed_math));
833  Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
834                        Args.hasArg(OPT_cl_no_signed_zeros) ||
835                        Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
836                        Args.hasArg(OPT_cl_fast_relaxed_math));
837  Opts.Reassociate = Args.hasArg(OPT_mreassociate);
838  Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero) ||
839                     (Args.hasArg(OPT_fcuda_is_device) &&
840                      Args.hasArg(OPT_fcuda_flush_denormals_to_zero));
841  Opts.CorrectlyRoundedDivSqrt =
842      Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
843  Opts.UniformWGSize =
844      Args.hasArg(OPT_cl_uniform_work_group_size);
845  Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
846  Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
847  Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
848  Opts.StrictFloatCastOverflow =
849      !Args.hasArg(OPT_fno_strict_float_cast_overflow);
850
851  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
852  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
853  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
854  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
855  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
856  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
857  Opts.IncrementalLinkerCompatible =
858      Args.hasArg(OPT_mincremental_linker_compatible);
859  Opts.PIECopyRelocations =
860      Args.hasArg(OPT_mpie_copy_relocations);
861  Opts.NoPLT = Args.hasArg(OPT_fno_plt);
862  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
863  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
864  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
865  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
866  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
867  Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
868  Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
869  Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
870  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
871                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
872                      Args.hasArg(OPT_cl_fast_relaxed_math);
873  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
874  Opts.RelocationModel = getRelocModel(Args, Diags);
875  Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
876  if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
877    Diags.Report(diag::err_drv_invalid_value)
878        << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
879        << Opts.ThreadModel;
880  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
881  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
882
883  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
884                                       OPT_fno_function_sections, false);
885  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
886                                   OPT_fno_data_sections, false);
887  Opts.StackSizeSection =
888      Args.hasFlag(OPT_fstack_size_section, OPT_fno_stack_size_section, false);
889  Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
890                                         OPT_fno_unique_section_names, true);
891
892  Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
893
894  Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
895
896  Opts.NullPointerIsValid = Args.hasArg(OPT_fno_delete_null_pointer_checks);
897
898  Opts.ProfileSampleAccurate = Args.hasArg(OPT_fprofile_sample_accurate);
899
900  Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
901  Opts.PrepareForThinLTO = false;
902  if (Arg *A = Args.getLastArg(OPT_flto_EQ)) {
903    StringRef S = A->getValue();
904    if (S == "thin")
905      Opts.PrepareForThinLTO = true;
906    else if (S != "full")
907      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << S;
908  }
909  Opts.LTOUnit = Args.hasFlag(OPT_flto_unit, OPT_fno_lto_unit, false);
910  Opts.EnableSplitLTOUnit = Args.hasArg(OPT_fsplit_lto_unit);
911  if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
912    if (IK.getLanguage() != InputKind::LLVM_IR)
913      Diags.Report(diag::err_drv_argument_only_allowed_with)
914          << A->getAsString(Args) << "-x ir";
915    Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
916  }
917  if (Arg *A = Args.getLastArg(OPT_save_temps_EQ))
918    Opts.SaveTempsFilePrefix =
919        llvm::StringSwitch<std::string>(A->getValue())
920            .Case("obj", FrontendOpts.OutputFile)
921            .Default(llvm::sys::path::filename(FrontendOpts.OutputFile).str());
922
923  Opts.ThinLinkBitcodeFile = Args.getLastArgValue(OPT_fthin_link_bitcode_EQ);
924
925  Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
926
927  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
928  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
929
930  Opts.PreferVectorWidth = Args.getLastArgValue(OPT_mprefer_vector_width_EQ);
931
932  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
933  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
934
935  Opts.ControlFlowGuard = Args.hasArg(OPT_cfguard);
936
937  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
938  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
939  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
940  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
941    Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
942    Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
943    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
944    Opts.CoverageNoFunctionNamesInData =
945        Args.hasArg(OPT_coverage_no_function_names_in_data);
946    Opts.ProfileFilterFiles =
947        Args.getLastArgValue(OPT_fprofile_filter_files_EQ);
948    Opts.ProfileExcludeFiles =
949        Args.getLastArgValue(OPT_fprofile_exclude_files_EQ);
950    Opts.CoverageExitBlockBeforeBody =
951        Args.hasArg(OPT_coverage_exit_block_before_body);
952    if (Args.hasArg(OPT_coverage_version_EQ)) {
953      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
954      if (CoverageVersion.size() != 4) {
955        Diags.Report(diag::err_drv_invalid_value)
956            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
957            << CoverageVersion;
958      } else {
959        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
960      }
961    }
962  }
963  // Handle -fembed-bitcode option.
964  if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
965    StringRef Name = A->getValue();
966    unsigned Model = llvm::StringSwitch<unsigned>(Name)
967        .Case("off", CodeGenOptions::Embed_Off)
968        .Case("all", CodeGenOptions::Embed_All)
969        .Case("bitcode", CodeGenOptions::Embed_Bitcode)
970        .Case("marker", CodeGenOptions::Embed_Marker)
971        .Default(~0U);
972    if (Model == ~0U) {
973      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
974      Success = false;
975    } else
976      Opts.setEmbedBitcode(
977          static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
978  }
979  // FIXME: For backend options that are not yet recorded as function
980  // attributes in the IR, keep track of them so we can embed them in a
981  // separate data section and use them when building the bitcode.
982  if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
983    for (const auto &A : Args) {
984      // Do not encode output and input.
985      if (A->getOption().getID() == options::OPT_o ||
986          A->getOption().getID() == options::OPT_INPUT ||
987          A->getOption().getID() == options::OPT_x ||
988          A->getOption().getID() == options::OPT_fembed_bitcode ||
989          (A->getOption().getGroup().isValid() &&
990           A->getOption().getGroup().getID() == options::OPT_W_Group))
991        continue;
992      ArgStringList ASL;
993      A->render(Args, ASL);
994      for (const auto &arg : ASL) {
995        StringRef ArgStr(arg);
996        Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
997        // using \00 to separate each commandline options.
998        Opts.CmdArgs.push_back('\0');
999      }
1000    }
1001  }
1002
1003  Opts.PreserveVec3Type = Args.hasArg(OPT_fpreserve_vec3_type);
1004  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1005  Opts.InstrumentFunctionsAfterInlining =
1006      Args.hasArg(OPT_finstrument_functions_after_inlining);
1007  Opts.InstrumentFunctionEntryBare =
1008      Args.hasArg(OPT_finstrument_function_entry_bare);
1009
1010  Opts.XRayInstrumentFunctions =
1011      Args.hasArg(OPT_fxray_instrument);
1012  Opts.XRayAlwaysEmitCustomEvents =
1013      Args.hasArg(OPT_fxray_always_emit_customevents);
1014  Opts.XRayAlwaysEmitTypedEvents =
1015      Args.hasArg(OPT_fxray_always_emit_typedevents);
1016  Opts.XRayInstructionThreshold =
1017      getLastArgIntValue(Args, OPT_fxray_instruction_threshold_EQ, 200, Diags);
1018
1019  auto XRayInstrBundles =
1020      Args.getAllArgValues(OPT_fxray_instrumentation_bundle);
1021  if (XRayInstrBundles.empty())
1022    Opts.XRayInstrumentationBundle.Mask = XRayInstrKind::All;
1023  else
1024    for (const auto &A : XRayInstrBundles)
1025      parseXRayInstrumentationBundle("-fxray-instrumentation-bundle=", A, Args,
1026                                     Diags, Opts.XRayInstrumentationBundle);
1027
1028  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1029  Opts.CallFEntry = Args.hasArg(OPT_mfentry);
1030  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
1031
1032  if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
1033    StringRef Name = A->getValue();
1034    if (Name == "full") {
1035      Opts.CFProtectionReturn = 1;
1036      Opts.CFProtectionBranch = 1;
1037    } else if (Name == "return")
1038      Opts.CFProtectionReturn = 1;
1039    else if (Name == "branch")
1040      Opts.CFProtectionBranch = 1;
1041    else if (Name != "none") {
1042      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1043      Success = false;
1044    }
1045  }
1046
1047  if (const Arg *A = Args.getLastArg(OPT_compress_debug_sections,
1048                                     OPT_compress_debug_sections_EQ)) {
1049    if (A->getOption().getID() == OPT_compress_debug_sections) {
1050      // TODO: be more clever about the compression type auto-detection
1051      Opts.setCompressDebugSections(llvm::DebugCompressionType::GNU);
1052    } else {
1053      auto DCT = llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
1054                     .Case("none", llvm::DebugCompressionType::None)
1055                     .Case("zlib", llvm::DebugCompressionType::Z)
1056                     .Case("zlib-gnu", llvm::DebugCompressionType::GNU)
1057                     .Default(llvm::DebugCompressionType::None);
1058      Opts.setCompressDebugSections(DCT);
1059    }
1060  }
1061
1062  Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
1063  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1064  for (auto *A :
1065       Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_builtin_bitcode)) {
1066    CodeGenOptions::BitcodeFileToLink F;
1067    F.Filename = A->getValue();
1068    if (A->getOption().matches(OPT_mlink_builtin_bitcode)) {
1069      F.LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded;
1070      // When linking CUDA bitcode, propagate function attributes so that
1071      // e.g. libdevice gets fast-math attrs if we're building with fast-math.
1072      F.PropagateAttrs = true;
1073      F.Internalize = true;
1074    }
1075    Opts.LinkBitcodeFiles.push_back(F);
1076  }
1077  Opts.SanitizeCoverageType =
1078      getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
1079  Opts.SanitizeCoverageIndirectCalls =
1080      Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
1081  Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
1082  Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
1083  Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
1084  Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
1085  Opts.SanitizeCoverage8bitCounters =
1086      Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
1087  Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
1088  Opts.SanitizeCoverageTracePCGuard =
1089      Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
1090  Opts.SanitizeCoverageNoPrune = Args.hasArg(OPT_fsanitize_coverage_no_prune);
1091  Opts.SanitizeCoverageInline8bitCounters =
1092      Args.hasArg(OPT_fsanitize_coverage_inline_8bit_counters);
1093  Opts.SanitizeCoveragePCTable = Args.hasArg(OPT_fsanitize_coverage_pc_table);
1094  Opts.SanitizeCoverageStackDepth =
1095      Args.hasArg(OPT_fsanitize_coverage_stack_depth);
1096  Opts.SanitizeMemoryTrackOrigins =
1097      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
1098  Opts.SanitizeMemoryUseAfterDtor =
1099      Args.hasFlag(OPT_fsanitize_memory_use_after_dtor,
1100                   OPT_fno_sanitize_memory_use_after_dtor,
1101                   false);
1102  Opts.SanitizeMinimalRuntime = Args.hasArg(OPT_fsanitize_minimal_runtime);
1103  Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
1104  Opts.SanitizeCfiICallGeneralizePointers =
1105      Args.hasArg(OPT_fsanitize_cfi_icall_generalize_pointers);
1106  Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
1107  if (Arg *A = Args.getLastArg(
1108          OPT_fsanitize_address_poison_custom_array_cookie,
1109          OPT_fno_sanitize_address_poison_custom_array_cookie)) {
1110    Opts.SanitizeAddressPoisonCustomArrayCookie =
1111        A->getOption().getID() ==
1112        OPT_fsanitize_address_poison_custom_array_cookie;
1113  }
1114  if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
1115                               OPT_fno_sanitize_address_use_after_scope)) {
1116    Opts.SanitizeAddressUseAfterScope =
1117        A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
1118  }
1119  Opts.SanitizeAddressGlobalsDeadStripping =
1120      Args.hasArg(OPT_fsanitize_address_globals_dead_stripping);
1121  if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_odr_indicator,
1122                               OPT_fno_sanitize_address_use_odr_indicator)) {
1123    Opts.SanitizeAddressUseOdrIndicator =
1124        A->getOption().getID() == OPT_fsanitize_address_use_odr_indicator;
1125  }
1126  Opts.SSPBufferSize =
1127      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
1128  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1129  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1130    StringRef Val = A->getValue();
1131    unsigned StackAlignment = Opts.StackAlignment;
1132    Val.getAsInteger(10, StackAlignment);
1133    Opts.StackAlignment = StackAlignment;
1134  }
1135
1136  if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
1137    StringRef Val = A->getValue();
1138    unsigned StackProbeSize = Opts.StackProbeSize;
1139    Val.getAsInteger(0, StackProbeSize);
1140    Opts.StackProbeSize = StackProbeSize;
1141  }
1142
1143  Opts.NoStackArgProbe = Args.hasArg(OPT_mno_stack_arg_probe);
1144
1145  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1146    StringRef Name = A->getValue();
1147    unsigned Method = llvm::StringSwitch<unsigned>(Name)
1148      .Case("legacy", CodeGenOptions::Legacy)
1149      .Case("non-legacy", CodeGenOptions::NonLegacy)
1150      .Case("mixed", CodeGenOptions::Mixed)
1151      .Default(~0U);
1152    if (Method == ~0U) {
1153      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1154      Success = false;
1155    } else {
1156      Opts.setObjCDispatchMethod(
1157        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
1158    }
1159  }
1160
1161
1162  if (Args.hasArg(OPT_fno_objc_convert_messages_to_runtime_calls))
1163    Opts.ObjCConvertMessagesToRuntimeCalls = 0;
1164
1165  if (Args.getLastArg(OPT_femulated_tls) ||
1166      Args.getLastArg(OPT_fno_emulated_tls)) {
1167    Opts.ExplicitEmulatedTLS = true;
1168    Opts.EmulatedTLS =
1169        Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
1170  }
1171
1172  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1173    StringRef Name = A->getValue();
1174    unsigned Model = llvm::StringSwitch<unsigned>(Name)
1175        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1176        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1177        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1178        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1179        .Default(~0U);
1180    if (Model == ~0U) {
1181      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1182      Success = false;
1183    } else {
1184      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
1185    }
1186  }
1187
1188  if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
1189    StringRef Val = A->getValue();
1190    if (Val == "ieee")
1191      Opts.FPDenormalMode = "ieee";
1192    else if (Val == "preserve-sign")
1193      Opts.FPDenormalMode = "preserve-sign";
1194    else if (Val == "positive-zero")
1195      Opts.FPDenormalMode = "positive-zero";
1196    else
1197      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1198  }
1199
1200  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
1201    if (A->getOption().matches(OPT_fpcc_struct_return)) {
1202      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
1203    } else {
1204      assert(A->getOption().matches(OPT_freg_struct_return));
1205      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
1206    }
1207  }
1208
1209  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
1210  Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
1211  bool NeedLocTracking = false;
1212
1213  Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
1214  if (!Opts.OptRecordFile.empty())
1215    NeedLocTracking = true;
1216
1217  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
1218    Opts.OptimizationRemarkPattern =
1219        GenerateOptimizationRemarkRegex(Diags, Args, A);
1220    NeedLocTracking = true;
1221  }
1222
1223  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
1224    Opts.OptimizationRemarkMissedPattern =
1225        GenerateOptimizationRemarkRegex(Diags, Args, A);
1226    NeedLocTracking = true;
1227  }
1228
1229  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
1230    Opts.OptimizationRemarkAnalysisPattern =
1231        GenerateOptimizationRemarkRegex(Diags, Args, A);
1232    NeedLocTracking = true;
1233  }
1234
1235  Opts.DiagnosticsWithHotness =
1236      Args.hasArg(options::OPT_fdiagnostics_show_hotness);
1237  bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
1238  bool UsingProfile = UsingSampleProfile ||
1239      (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
1240
1241  if (Opts.DiagnosticsWithHotness && !UsingProfile &&
1242      // An IR file will contain PGO as metadata
1243      IK.getLanguage() != InputKind::LLVM_IR)
1244    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1245        << "-fdiagnostics-show-hotness";
1246
1247  Opts.DiagnosticsHotnessThreshold = getLastArgUInt64Value(
1248      Args, options::OPT_fdiagnostics_hotness_threshold_EQ, 0);
1249  if (Opts.DiagnosticsHotnessThreshold > 0 && !UsingProfile)
1250    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
1251        << "-fdiagnostics-hotness-threshold=";
1252
1253  // If the user requested to use a sample profile for PGO, then the
1254  // backend will need to track source location information so the profile
1255  // can be incorporated into the IR.
1256  if (UsingSampleProfile)
1257    NeedLocTracking = true;
1258
1259  // If the user requested a flag that requires source locations available in
1260  // the backend, make sure that the backend tracks source location information.
1261  if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
1262    Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
1263
1264  Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
1265
1266  // Parse -fsanitize-recover= arguments.
1267  // FIXME: Report unrecoverable sanitizers incorrectly specified here.
1268  parseSanitizerKinds("-fsanitize-recover=",
1269                      Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
1270                      Opts.SanitizeRecover);
1271  parseSanitizerKinds("-fsanitize-trap=",
1272                      Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
1273                      Opts.SanitizeTrap);
1274
1275  Opts.CudaGpuBinaryFileName =
1276      Args.getLastArgValue(OPT_fcuda_include_gpubinary);
1277
1278  Opts.Backchain = Args.hasArg(OPT_mbackchain);
1279
1280  Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
1281      Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
1282
1283  Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
1284
1285  Opts.Addrsig = Args.hasArg(OPT_faddrsig);
1286
1287  if (Arg *A = Args.getLastArg(OPT_msign_return_address_EQ)) {
1288    StringRef SignScope = A->getValue();
1289
1290    if (SignScope.equals_lower("none"))
1291      Opts.setSignReturnAddress(CodeGenOptions::SignReturnAddressScope::None);
1292    else if (SignScope.equals_lower("all"))
1293      Opts.setSignReturnAddress(CodeGenOptions::SignReturnAddressScope::All);
1294    else if (SignScope.equals_lower("non-leaf"))
1295      Opts.setSignReturnAddress(
1296          CodeGenOptions::SignReturnAddressScope::NonLeaf);
1297    else
1298      Diags.Report(diag::err_drv_invalid_value)
1299          << A->getAsString(Args) << SignScope;
1300
1301    if (Arg *A = Args.getLastArg(OPT_msign_return_address_key_EQ)) {
1302      StringRef SignKey = A->getValue();
1303      if (!SignScope.empty() && !SignKey.empty()) {
1304        if (SignKey.equals_lower("a_key"))
1305          Opts.setSignReturnAddressKey(
1306              CodeGenOptions::SignReturnAddressKeyValue::AKey);
1307        else if (SignKey.equals_lower("b_key"))
1308          Opts.setSignReturnAddressKey(
1309              CodeGenOptions::SignReturnAddressKeyValue::BKey);
1310        else
1311          Diags.Report(diag::err_drv_invalid_value)
1312              << A->getAsString(Args) << SignKey;
1313      }
1314    }
1315  }
1316
1317  Opts.BranchTargetEnforcement = Args.hasArg(OPT_mbranch_target_enforce);
1318
1319  Opts.KeepStaticConsts = Args.hasArg(OPT_fkeep_static_consts);
1320
1321  Opts.SpeculativeLoadHardening = Args.hasArg(OPT_mspeculative_load_hardening);
1322
1323  Opts.DefaultFunctionAttrs = Args.getAllArgValues(OPT_default_function_attr);
1324
1325  return Success;
1326}
1327
1328static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1329                                      ArgList &Args) {
1330  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1331  Opts.Targets = Args.getAllArgValues(OPT_MT);
1332  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1333  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
1334  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1335  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1336  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1337  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1338  if (Args.hasArg(OPT_show_includes)) {
1339    // Writing both /showIncludes and preprocessor output to stdout
1340    // would produce interleaved output, so use stderr for /showIncludes.
1341    // This behaves the same as cl.exe, when /E, /EP or /P are passed.
1342    if (Args.hasArg(options::OPT_E) || Args.hasArg(options::OPT_P))
1343      Opts.ShowIncludesDest = ShowIncludesDestination::Stderr;
1344    else
1345      Opts.ShowIncludesDest = ShowIncludesDestination::Stdout;
1346  } else {
1347    Opts.ShowIncludesDest = ShowIncludesDestination::None;
1348  }
1349  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1350  Opts.ModuleDependencyOutputDir =
1351      Args.getLastArgValue(OPT_module_dependency_dir);
1352  if (Args.hasArg(OPT_MV))
1353    Opts.OutputFormat = DependencyOutputFormat::NMake;
1354  // Add sanitizer blacklists as extra dependencies.
1355  // They won't be discovered by the regular preprocessor, so
1356  // we let make / ninja to know about this implicit dependency.
1357  Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
1358  // Only the -fmodule-file=<file> form.
1359  for (const auto *A : Args.filtered(OPT_fmodule_file)) {
1360    StringRef Val = A->getValue();
1361    if (Val.find('=') == StringRef::npos)
1362      Opts.ExtraDeps.push_back(Val);
1363  }
1364}
1365
1366static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
1367  // Color diagnostics default to auto ("on" if terminal supports) in the driver
1368  // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
1369  // Support both clang's -f[no-]color-diagnostics and gcc's
1370  // -f[no-]diagnostics-colors[=never|always|auto].
1371  enum {
1372    Colors_On,
1373    Colors_Off,
1374    Colors_Auto
1375  } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
1376  for (auto *A : Args) {
1377    const Option &O = A->getOption();
1378    if (O.matches(options::OPT_fcolor_diagnostics) ||
1379        O.matches(options::OPT_fdiagnostics_color)) {
1380      ShowColors = Colors_On;
1381    } else if (O.matches(options::OPT_fno_color_diagnostics) ||
1382               O.matches(options::OPT_fno_diagnostics_color)) {
1383      ShowColors = Colors_Off;
1384    } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
1385      StringRef Value(A->getValue());
1386      if (Value == "always")
1387        ShowColors = Colors_On;
1388      else if (Value == "never")
1389        ShowColors = Colors_Off;
1390      else if (Value == "auto")
1391        ShowColors = Colors_Auto;
1392    }
1393  }
1394  return ShowColors == Colors_On ||
1395         (ShowColors == Colors_Auto &&
1396          llvm::sys::Process::StandardErrHasColors());
1397}
1398
1399static bool checkVerifyPrefixes(const std::vector<std::string> &VerifyPrefixes,
1400                                DiagnosticsEngine *Diags) {
1401  bool Success = true;
1402  for (const auto &Prefix : VerifyPrefixes) {
1403    // Every prefix must start with a letter and contain only alphanumeric
1404    // characters, hyphens, and underscores.
1405    auto BadChar = std::find_if(Prefix.begin(), Prefix.end(),
1406                                [](char C){return !isAlphanumeric(C)
1407                                                  && C != '-' && C != '_';});
1408    if (BadChar != Prefix.end() || !isLetter(Prefix[0])) {
1409      Success = false;
1410      if (Diags) {
1411        Diags->Report(diag::err_drv_invalid_value) << "-verify=" << Prefix;
1412        Diags->Report(diag::note_drv_verify_prefix_spelling);
1413      }
1414    }
1415  }
1416  return Success;
1417}
1418
1419bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1420                                DiagnosticsEngine *Diags,
1421                                bool DefaultDiagColor, bool DefaultShowOpt) {
1422  bool Success = true;
1423
1424  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1425  if (Arg *A =
1426          Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
1427    Opts.DiagnosticSerializationFile = A->getValue();
1428  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1429  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1430  Opts.Pedantic = Args.hasArg(OPT_pedantic);
1431  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1432  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1433  Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
1434  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1435                                 OPT_fno_show_column,
1436                                 /*Default=*/true);
1437  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1438  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1439  Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
1440  Opts.ShowOptionNames =
1441      Args.hasFlag(OPT_fdiagnostics_show_option,
1442                   OPT_fno_diagnostics_show_option, DefaultShowOpt);
1443
1444  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
1445
1446  // Default behavior is to not to show note include stacks.
1447  Opts.ShowNoteIncludeStack = false;
1448  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1449                               OPT_fno_diagnostics_show_note_include_stack))
1450    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1451      Opts.ShowNoteIncludeStack = true;
1452
1453  StringRef ShowOverloads =
1454    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1455  if (ShowOverloads == "best")
1456    Opts.setShowOverloads(Ovl_Best);
1457  else if (ShowOverloads == "all")
1458    Opts.setShowOverloads(Ovl_All);
1459  else {
1460    Success = false;
1461    if (Diags)
1462      Diags->Report(diag::err_drv_invalid_value)
1463      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1464      << ShowOverloads;
1465  }
1466
1467  StringRef ShowCategory =
1468    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1469  if (ShowCategory == "none")
1470    Opts.ShowCategories = 0;
1471  else if (ShowCategory == "id")
1472    Opts.ShowCategories = 1;
1473  else if (ShowCategory == "name")
1474    Opts.ShowCategories = 2;
1475  else {
1476    Success = false;
1477    if (Diags)
1478      Diags->Report(diag::err_drv_invalid_value)
1479      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1480      << ShowCategory;
1481  }
1482
1483  StringRef Format =
1484    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1485  if (Format == "clang")
1486    Opts.setFormat(DiagnosticOptions::Clang);
1487  else if (Format == "msvc")
1488    Opts.setFormat(DiagnosticOptions::MSVC);
1489  else if (Format == "msvc-fallback") {
1490    Opts.setFormat(DiagnosticOptions::MSVC);
1491    Opts.CLFallbackMode = true;
1492  } else if (Format == "vi")
1493    Opts.setFormat(DiagnosticOptions::Vi);
1494  else {
1495    Success = false;
1496    if (Diags)
1497      Diags->Report(diag::err_drv_invalid_value)
1498      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1499      << Format;
1500  }
1501
1502  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1503  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1504  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1505  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify) || Args.hasArg(OPT_verify_EQ);
1506  Opts.VerifyPrefixes = Args.getAllArgValues(OPT_verify_EQ);
1507  if (Args.hasArg(OPT_verify))
1508    Opts.VerifyPrefixes.push_back("expected");
1509  // Keep VerifyPrefixes in its original order for the sake of diagnostics, and
1510  // then sort it to prepare for fast lookup using std::binary_search.
1511  if (!checkVerifyPrefixes(Opts.VerifyPrefixes, Diags)) {
1512    Opts.VerifyDiagnostics = false;
1513    Success = false;
1514  }
1515  else
1516    llvm::sort(Opts.VerifyPrefixes);
1517  DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1518  Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1519    Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1520    Diags, DiagMask);
1521  if (Args.hasArg(OPT_verify_ignore_unexpected))
1522    DiagMask = DiagnosticLevelMask::All;
1523  Opts.setVerifyIgnoreUnexpected(DiagMask);
1524  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1525  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1526  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1527  Opts.MacroBacktraceLimit =
1528      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1529                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1530  Opts.TemplateBacktraceLimit = getLastArgIntValue(
1531      Args, OPT_ftemplate_backtrace_limit,
1532      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1533  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1534      Args, OPT_fconstexpr_backtrace_limit,
1535      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1536  Opts.SpellCheckingLimit = getLastArgIntValue(
1537      Args, OPT_fspell_checking_limit,
1538      DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1539  Opts.SnippetLineLimit = getLastArgIntValue(
1540      Args, OPT_fcaret_diagnostics_max_lines,
1541      DiagnosticOptions::DefaultSnippetLineLimit, Diags);
1542  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1543                                    DiagnosticOptions::DefaultTabStop, Diags);
1544  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1545    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1546    if (Diags)
1547      Diags->Report(diag::warn_ignoring_ftabstop_value)
1548      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1549  }
1550  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1551  addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1552  addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1553
1554  return Success;
1555}
1556
1557static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1558  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1559}
1560
1561/// Parse the argument to the -ftest-module-file-extension
1562/// command-line argument.
1563///
1564/// \returns true on error, false on success.
1565static bool parseTestModuleFileExtensionArg(StringRef Arg,
1566                                            std::string &BlockName,
1567                                            unsigned &MajorVersion,
1568                                            unsigned &MinorVersion,
1569                                            bool &Hashed,
1570                                            std::string &UserInfo) {
1571  SmallVector<StringRef, 5> Args;
1572  Arg.split(Args, ':', 5);
1573  if (Args.size() < 5)
1574    return true;
1575
1576  BlockName = Args[0];
1577  if (Args[1].getAsInteger(10, MajorVersion)) return true;
1578  if (Args[2].getAsInteger(10, MinorVersion)) return true;
1579  if (Args[3].getAsInteger(2, Hashed)) return true;
1580  if (Args.size() > 4)
1581    UserInfo = Args[4];
1582  return false;
1583}
1584
1585static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1586                                   DiagnosticsEngine &Diags,
1587                                   bool &IsHeaderFile) {
1588  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1589  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1590    switch (A->getOption().getID()) {
1591    default:
1592      llvm_unreachable("Invalid option in group!");
1593    case OPT_ast_list:
1594      Opts.ProgramAction = frontend::ASTDeclList; break;
1595    case OPT_ast_dump:
1596    case OPT_ast_dump_all:
1597    case OPT_ast_dump_lookups:
1598      Opts.ProgramAction = frontend::ASTDump; break;
1599    case OPT_ast_print:
1600      Opts.ProgramAction = frontend::ASTPrint; break;
1601    case OPT_ast_view:
1602      Opts.ProgramAction = frontend::ASTView; break;
1603    case OPT_compiler_options_dump:
1604      Opts.ProgramAction = frontend::DumpCompilerOptions; break;
1605    case OPT_dump_raw_tokens:
1606      Opts.ProgramAction = frontend::DumpRawTokens; break;
1607    case OPT_dump_tokens:
1608      Opts.ProgramAction = frontend::DumpTokens; break;
1609    case OPT_S:
1610      Opts.ProgramAction = frontend::EmitAssembly; break;
1611    case OPT_emit_llvm_bc:
1612      Opts.ProgramAction = frontend::EmitBC; break;
1613    case OPT_emit_html:
1614      Opts.ProgramAction = frontend::EmitHTML; break;
1615    case OPT_emit_llvm:
1616      Opts.ProgramAction = frontend::EmitLLVM; break;
1617    case OPT_emit_llvm_only:
1618      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1619    case OPT_emit_codegen_only:
1620      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1621    case OPT_emit_obj:
1622      Opts.ProgramAction = frontend::EmitObj; break;
1623    case OPT_fixit_EQ:
1624      Opts.FixItSuffix = A->getValue();
1625      LLVM_FALLTHROUGH;
1626    case OPT_fixit:
1627      Opts.ProgramAction = frontend::FixIt; break;
1628    case OPT_emit_module:
1629      Opts.ProgramAction = frontend::GenerateModule; break;
1630    case OPT_emit_module_interface:
1631      Opts.ProgramAction = frontend::GenerateModuleInterface; break;
1632    case OPT_emit_header_module:
1633      Opts.ProgramAction = frontend::GenerateHeaderModule; break;
1634    case OPT_emit_pch:
1635      Opts.ProgramAction = frontend::GeneratePCH; break;
1636    case OPT_init_only:
1637      Opts.ProgramAction = frontend::InitOnly; break;
1638    case OPT_fsyntax_only:
1639      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1640    case OPT_module_file_info:
1641      Opts.ProgramAction = frontend::ModuleFileInfo; break;
1642    case OPT_verify_pch:
1643      Opts.ProgramAction = frontend::VerifyPCH; break;
1644    case OPT_print_preamble:
1645      Opts.ProgramAction = frontend::PrintPreamble; break;
1646    case OPT_E:
1647      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1648    case OPT_templight_dump:
1649      Opts.ProgramAction = frontend::TemplightDump; break;
1650    case OPT_rewrite_macros:
1651      Opts.ProgramAction = frontend::RewriteMacros; break;
1652    case OPT_rewrite_objc:
1653      Opts.ProgramAction = frontend::RewriteObjC; break;
1654    case OPT_rewrite_test:
1655      Opts.ProgramAction = frontend::RewriteTest; break;
1656    case OPT_analyze:
1657      Opts.ProgramAction = frontend::RunAnalysis; break;
1658    case OPT_migrate:
1659      Opts.ProgramAction = frontend::MigrateSource; break;
1660    case OPT_Eonly:
1661      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1662    }
1663  }
1664
1665  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1666    Opts.Plugins.emplace_back(A->getValue(0));
1667    Opts.ProgramAction = frontend::PluginAction;
1668    Opts.ActionName = A->getValue();
1669  }
1670  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1671  for (const auto *AA : Args.filtered(OPT_plugin_arg))
1672    Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1673
1674  for (const std::string &Arg :
1675         Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1676    std::string BlockName;
1677    unsigned MajorVersion;
1678    unsigned MinorVersion;
1679    bool Hashed;
1680    std::string UserInfo;
1681    if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1682                                        MinorVersion, Hashed, UserInfo)) {
1683      Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1684
1685      continue;
1686    }
1687
1688    // Add the testing module file extension.
1689    Opts.ModuleFileExtensions.push_back(
1690        std::make_shared<TestModuleFileExtension>(
1691            BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
1692  }
1693
1694  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1695    Opts.CodeCompletionAt =
1696      ParsedSourceLocation::FromString(A->getValue());
1697    if (Opts.CodeCompletionAt.FileName.empty())
1698      Diags.Report(diag::err_drv_invalid_value)
1699        << A->getAsString(Args) << A->getValue();
1700  }
1701  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1702
1703  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1704  Opts.Plugins = Args.getAllArgValues(OPT_load);
1705  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1706  Opts.ShowHelp = Args.hasArg(OPT_help);
1707  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1708  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1709  Opts.ShowVersion = Args.hasArg(OPT_version);
1710  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1711  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1712  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1713  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1714  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1715  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1716  Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1717  Opts.ASTDumpAll = Args.hasArg(OPT_ast_dump_all);
1718  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1719  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1720  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1721  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1722  Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1723  // Only the -fmodule-file=<file> form.
1724  for (const auto *A : Args.filtered(OPT_fmodule_file)) {
1725    StringRef Val = A->getValue();
1726    if (Val.find('=') == StringRef::npos)
1727      Opts.ModuleFiles.push_back(Val);
1728  }
1729  Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1730  Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1731  Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1732
1733  Opts.CodeCompleteOpts.IncludeMacros
1734    = Args.hasArg(OPT_code_completion_macros);
1735  Opts.CodeCompleteOpts.IncludeCodePatterns
1736    = Args.hasArg(OPT_code_completion_patterns);
1737  Opts.CodeCompleteOpts.IncludeGlobals
1738    = !Args.hasArg(OPT_no_code_completion_globals);
1739  Opts.CodeCompleteOpts.IncludeNamespaceLevelDecls
1740    = !Args.hasArg(OPT_no_code_completion_ns_level_decls);
1741  Opts.CodeCompleteOpts.IncludeBriefComments
1742    = Args.hasArg(OPT_code_completion_brief_comments);
1743  Opts.CodeCompleteOpts.IncludeFixIts
1744    = Args.hasArg(OPT_code_completion_with_fixits);
1745
1746  Opts.OverrideRecordLayoutsFile
1747    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1748  Opts.AuxTriple = Args.getLastArgValue(OPT_aux_triple);
1749  Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
1750
1751  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1752                                     OPT_arcmt_modify,
1753                                     OPT_arcmt_migrate)) {
1754    switch (A->getOption().getID()) {
1755    default:
1756      llvm_unreachable("missed a case");
1757    case OPT_arcmt_check:
1758      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1759      break;
1760    case OPT_arcmt_modify:
1761      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1762      break;
1763    case OPT_arcmt_migrate:
1764      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1765      break;
1766    }
1767  }
1768  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1769  Opts.ARCMTMigrateReportOut
1770    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1771  Opts.ARCMTMigrateEmitARCErrors
1772    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1773
1774  if (Args.hasArg(OPT_objcmt_migrate_literals))
1775    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1776  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1777    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1778  if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1779    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1780  if (Args.hasArg(OPT_objcmt_migrate_property))
1781    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1782  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1783    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1784  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1785    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1786  if (Args.hasArg(OPT_objcmt_migrate_annotation))
1787    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1788  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1789    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1790  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1791    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1792  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1793    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1794  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1795    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1796  if (Args.hasArg(OPT_objcmt_atomic_property))
1797    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1798  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1799    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1800  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1801    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1802  if (Args.hasArg(OPT_objcmt_migrate_all))
1803    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1804
1805  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1806
1807  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1808      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1809    Diags.Report(diag::err_drv_argument_not_allowed_with)
1810      << "ARC migration" << "ObjC migration";
1811  }
1812
1813  InputKind DashX(InputKind::Unknown);
1814  if (const Arg *A = Args.getLastArg(OPT_x)) {
1815    StringRef XValue = A->getValue();
1816
1817    // Parse suffixes: '<lang>(-header|[-module-map][-cpp-output])'.
1818    // FIXME: Supporting '<lang>-header-cpp-output' would be useful.
1819    bool Preprocessed = XValue.consume_back("-cpp-output");
1820    bool ModuleMap = XValue.consume_back("-module-map");
1821    IsHeaderFile =
1822        !Preprocessed && !ModuleMap && XValue.consume_back("-header");
1823
1824    // Principal languages.
1825    DashX = llvm::StringSwitch<InputKind>(XValue)
1826                .Case("c", InputKind::C)
1827                .Case("cl", InputKind::OpenCL)
1828                .Case("cuda", InputKind::CUDA)
1829                .Case("hip", InputKind::HIP)
1830                .Case("c++", InputKind::CXX)
1831                .Case("objective-c", InputKind::ObjC)
1832                .Case("objective-c++", InputKind::ObjCXX)
1833                .Case("renderscript", InputKind::RenderScript)
1834                .Default(InputKind::Unknown);
1835
1836    // "objc[++]-cpp-output" is an acceptable synonym for
1837    // "objective-c[++]-cpp-output".
1838    if (DashX.isUnknown() && Preprocessed && !IsHeaderFile && !ModuleMap)
1839      DashX = llvm::StringSwitch<InputKind>(XValue)
1840                  .Case("objc", InputKind::ObjC)
1841                  .Case("objc++", InputKind::ObjCXX)
1842                  .Default(InputKind::Unknown);
1843
1844    // Some special cases cannot be combined with suffixes.
1845    if (DashX.isUnknown() && !Preprocessed && !ModuleMap && !IsHeaderFile)
1846      DashX = llvm::StringSwitch<InputKind>(XValue)
1847                  .Case("cpp-output", InputKind(InputKind::C).getPreprocessed())
1848                  .Case("assembler-with-cpp", InputKind::Asm)
1849                  .Cases("ast", "pcm",
1850                         InputKind(InputKind::Unknown, InputKind::Precompiled))
1851                  .Case("ir", InputKind::LLVM_IR)
1852                  .Default(InputKind::Unknown);
1853
1854    if (DashX.isUnknown())
1855      Diags.Report(diag::err_drv_invalid_value)
1856        << A->getAsString(Args) << A->getValue();
1857
1858    if (Preprocessed)
1859      DashX = DashX.getPreprocessed();
1860    if (ModuleMap)
1861      DashX = DashX.withFormat(InputKind::ModuleMap);
1862  }
1863
1864  // '-' is the default input if none is given.
1865  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1866  Opts.Inputs.clear();
1867  if (Inputs.empty())
1868    Inputs.push_back("-");
1869  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1870    InputKind IK = DashX;
1871    if (IK.isUnknown()) {
1872      IK = FrontendOptions::getInputKindForExtension(
1873        StringRef(Inputs[i]).rsplit('.').second);
1874      // FIXME: Warn on this?
1875      if (IK.isUnknown())
1876        IK = InputKind::C;
1877      // FIXME: Remove this hack.
1878      if (i == 0)
1879        DashX = IK;
1880    }
1881
1882    // The -emit-module action implicitly takes a module map.
1883    if (Opts.ProgramAction == frontend::GenerateModule &&
1884        IK.getFormat() == InputKind::Source)
1885      IK = IK.withFormat(InputKind::ModuleMap);
1886
1887    Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1888  }
1889
1890  return DashX;
1891}
1892
1893std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1894                                                 void *MainAddr) {
1895  std::string ClangExecutable =
1896      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1897  StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1898
1899  // Compute the path to the resource directory.
1900  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1901  SmallString<128> P(Dir);
1902  if (ClangResourceDir != "")
1903    llvm::sys::path::append(P, ClangResourceDir);
1904  else
1905    llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1906                            "clang", CLANG_VERSION_STRING);
1907
1908  return P.str();
1909}
1910
1911static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
1912                                  const std::string &WorkingDir) {
1913  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1914  Opts.Verbose = Args.hasArg(OPT_v);
1915  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1916  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1917  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1918  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1919    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1920  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1921
1922  // Canonicalize -fmodules-cache-path before storing it.
1923  SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
1924  if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
1925    if (WorkingDir.empty())
1926      llvm::sys::fs::make_absolute(P);
1927    else
1928      llvm::sys::fs::make_absolute(WorkingDir, P);
1929  }
1930  llvm::sys::path::remove_dots(P);
1931  Opts.ModuleCachePath = P.str();
1932
1933  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1934  // Only the -fmodule-file=<name>=<file> form.
1935  for (const auto *A : Args.filtered(OPT_fmodule_file)) {
1936    StringRef Val = A->getValue();
1937    if (Val.find('=') != StringRef::npos)
1938      Opts.PrebuiltModuleFiles.insert(Val.split('='));
1939  }
1940  for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
1941    Opts.AddPrebuiltModulePath(A->getValue());
1942  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1943  Opts.ModulesHashContent = Args.hasArg(OPT_fmodules_hash_content);
1944  Opts.ModulesValidateDiagnosticOptions =
1945      !Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
1946  Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1947  Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1948  Opts.ModuleCachePruneInterval =
1949      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1950  Opts.ModuleCachePruneAfter =
1951      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1952  Opts.ModulesValidateOncePerBuildSession =
1953      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1954  Opts.BuildSessionTimestamp =
1955      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1956  Opts.ModulesValidateSystemHeaders =
1957      Args.hasArg(OPT_fmodules_validate_system_headers);
1958  if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1959    Opts.ModuleFormat = A->getValue();
1960
1961  for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1962    StringRef MacroDef = A->getValue();
1963    Opts.ModulesIgnoreMacros.insert(
1964        llvm::CachedHashString(MacroDef.split('=').first));
1965  }
1966
1967  // Add -I..., -F..., and -index-header-map options in order.
1968  bool IsIndexHeaderMap = false;
1969  bool IsSysrootSpecified =
1970      Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1971  for (const auto *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1972    if (A->getOption().matches(OPT_index_header_map)) {
1973      // -index-header-map applies to the next -I or -F.
1974      IsIndexHeaderMap = true;
1975      continue;
1976    }
1977
1978    frontend::IncludeDirGroup Group =
1979        IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1980
1981    bool IsFramework = A->getOption().matches(OPT_F);
1982    std::string Path = A->getValue();
1983
1984    if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1985      SmallString<32> Buffer;
1986      llvm::sys::path::append(Buffer, Opts.Sysroot,
1987                              llvm::StringRef(A->getValue()).substr(1));
1988      Path = Buffer.str();
1989    }
1990
1991    Opts.AddPath(Path, Group, IsFramework,
1992                 /*IgnoreSysroot*/ true);
1993    IsIndexHeaderMap = false;
1994  }
1995
1996  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1997  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1998  for (const auto *A :
1999       Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
2000    if (A->getOption().matches(OPT_iprefix))
2001      Prefix = A->getValue();
2002    else if (A->getOption().matches(OPT_iwithprefix))
2003      Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
2004    else
2005      Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
2006  }
2007
2008  for (const auto *A : Args.filtered(OPT_idirafter))
2009    Opts.AddPath(A->getValue(), frontend::After, false, true);
2010  for (const auto *A : Args.filtered(OPT_iquote))
2011    Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
2012  for (const auto *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
2013    Opts.AddPath(A->getValue(), frontend::System, false,
2014                 !A->getOption().matches(OPT_iwithsysroot));
2015  for (const auto *A : Args.filtered(OPT_iframework))
2016    Opts.AddPath(A->getValue(), frontend::System, true, true);
2017  for (const auto *A : Args.filtered(OPT_iframeworkwithsysroot))
2018    Opts.AddPath(A->getValue(), frontend::System, /*IsFramework=*/true,
2019                 /*IgnoreSysRoot=*/false);
2020
2021  // Add the paths for the various language specific isystem flags.
2022  for (const auto *A : Args.filtered(OPT_c_isystem))
2023    Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
2024  for (const auto *A : Args.filtered(OPT_cxx_isystem))
2025    Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
2026  for (const auto *A : Args.filtered(OPT_objc_isystem))
2027    Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
2028  for (const auto *A : Args.filtered(OPT_objcxx_isystem))
2029    Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
2030
2031  // Add the internal paths from a driver that detects standard include paths.
2032  for (const auto *A :
2033       Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
2034    frontend::IncludeDirGroup Group = frontend::System;
2035    if (A->getOption().matches(OPT_internal_externc_isystem))
2036      Group = frontend::ExternCSystem;
2037    Opts.AddPath(A->getValue(), Group, false, true);
2038  }
2039
2040  // Add the path prefixes which are implicitly treated as being system headers.
2041  for (const auto *A :
2042       Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
2043    Opts.AddSystemHeaderPrefix(
2044        A->getValue(), A->getOption().matches(OPT_system_header_prefix));
2045
2046  for (const auto *A : Args.filtered(OPT_ivfsoverlay))
2047    Opts.AddVFSOverlayFile(A->getValue());
2048}
2049
2050void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
2051                                         const llvm::Triple &T,
2052                                         PreprocessorOptions &PPOpts,
2053                                         LangStandard::Kind LangStd) {
2054  // Set some properties which depend solely on the input kind; it would be nice
2055  // to move these to the language standard, and have the driver resolve the
2056  // input kind + language standard.
2057  //
2058  // FIXME: Perhaps a better model would be for a single source file to have
2059  // multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
2060  // simultaneously active?
2061  if (IK.getLanguage() == InputKind::Asm) {
2062    Opts.AsmPreprocessor = 1;
2063  } else if (IK.isObjectiveC()) {
2064    Opts.ObjC = 1;
2065  }
2066
2067  if (LangStd == LangStandard::lang_unspecified) {
2068    // Based on the base language, pick one.
2069    switch (IK.getLanguage()) {
2070    case InputKind::Unknown:
2071    case InputKind::LLVM_IR:
2072      llvm_unreachable("Invalid input kind!");
2073    case InputKind::OpenCL:
2074      LangStd = LangStandard::lang_opencl10;
2075      break;
2076    case InputKind::CUDA:
2077      LangStd = LangStandard::lang_cuda;
2078      break;
2079    case InputKind::Asm:
2080    case InputKind::C:
2081#if defined(CLANG_DEFAULT_STD_C)
2082      LangStd = CLANG_DEFAULT_STD_C;
2083#else
2084      // The PS4 uses C99 as the default C standard.
2085      if (T.isPS4())
2086        LangStd = LangStandard::lang_gnu99;
2087      else
2088        LangStd = LangStandard::lang_gnu11;
2089#endif
2090      break;
2091    case InputKind::ObjC:
2092#if defined(CLANG_DEFAULT_STD_C)
2093      LangStd = CLANG_DEFAULT_STD_C;
2094#else
2095      LangStd = LangStandard::lang_gnu11;
2096#endif
2097      break;
2098    case InputKind::CXX:
2099    case InputKind::ObjCXX:
2100#if defined(CLANG_DEFAULT_STD_CXX)
2101      LangStd = CLANG_DEFAULT_STD_CXX;
2102#else
2103      LangStd = LangStandard::lang_gnucxx14;
2104#endif
2105      break;
2106    case InputKind::RenderScript:
2107      LangStd = LangStandard::lang_c99;
2108      break;
2109    case InputKind::HIP:
2110      LangStd = LangStandard::lang_hip;
2111      break;
2112    }
2113  }
2114
2115  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
2116  Opts.LineComment = Std.hasLineComments();
2117  Opts.C99 = Std.isC99();
2118  Opts.C11 = Std.isC11();
2119  Opts.C17 = Std.isC17();
2120  Opts.CPlusPlus = Std.isCPlusPlus();
2121  Opts.CPlusPlus11 = Std.isCPlusPlus11();
2122  Opts.CPlusPlus14 = Std.isCPlusPlus14();
2123  Opts.CPlusPlus17 = Std.isCPlusPlus17();
2124  Opts.CPlusPlus2a = Std.isCPlusPlus2a();
2125  Opts.Digraphs = Std.hasDigraphs();
2126  Opts.GNUMode = Std.isGNUMode();
2127  Opts.GNUInline = !Opts.C99 && !Opts.CPlusPlus;
2128  Opts.HexFloats = Std.hasHexFloats();
2129  Opts.ImplicitInt = Std.hasImplicitInt();
2130
2131  // Set OpenCL Version.
2132  Opts.OpenCL = Std.isOpenCL();
2133  if (LangStd == LangStandard::lang_opencl10)
2134    Opts.OpenCLVersion = 100;
2135  else if (LangStd == LangStandard::lang_opencl11)
2136    Opts.OpenCLVersion = 110;
2137  else if (LangStd == LangStandard::lang_opencl12)
2138    Opts.OpenCLVersion = 120;
2139  else if (LangStd == LangStandard::lang_opencl20)
2140    Opts.OpenCLVersion = 200;
2141  else if (LangStd == LangStandard::lang_openclcpp)
2142    Opts.OpenCLCPlusPlusVersion = 100;
2143
2144  // OpenCL has some additional defaults.
2145  if (Opts.OpenCL) {
2146    Opts.AltiVec = 0;
2147    Opts.ZVector = 0;
2148    Opts.LaxVectorConversions = 0;
2149    Opts.setDefaultFPContractMode(LangOptions::FPC_On);
2150    Opts.NativeHalfType = 1;
2151    Opts.NativeHalfArgsAndReturns = 1;
2152    Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
2153    // Include default header file for OpenCL.
2154    if (Opts.IncludeDefaultHeader) {
2155      PPOpts.Includes.push_back("opencl-c.h");
2156    }
2157  }
2158
2159  Opts.HIP = IK.getLanguage() == InputKind::HIP;
2160  Opts.CUDA = IK.getLanguage() == InputKind::CUDA || Opts.HIP;
2161  if (Opts.CUDA)
2162    // Set default FP_CONTRACT to FAST.
2163    Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
2164
2165  Opts.RenderScript = IK.getLanguage() == InputKind::RenderScript;
2166  if (Opts.RenderScript) {
2167    Opts.NativeHalfType = 1;
2168    Opts.NativeHalfArgsAndReturns = 1;
2169  }
2170
2171  // OpenCL and C++ both have bool, true, false keywords.
2172  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
2173
2174  // OpenCL has half keyword
2175  Opts.Half = Opts.OpenCL;
2176
2177  // C++ has wchar_t keyword.
2178  Opts.WChar = Opts.CPlusPlus;
2179
2180  Opts.GNUKeywords = Opts.GNUMode;
2181  Opts.CXXOperatorNames = Opts.CPlusPlus;
2182
2183  Opts.AlignedAllocation = Opts.CPlusPlus17;
2184
2185  Opts.DollarIdents = !Opts.AsmPreprocessor;
2186}
2187
2188/// Attempt to parse a visibility value out of the given argument.
2189static Visibility parseVisibility(Arg *arg, ArgList &args,
2190                                  DiagnosticsEngine &diags) {
2191  StringRef value = arg->getValue();
2192  if (value == "default") {
2193    return DefaultVisibility;
2194  } else if (value == "hidden" || value == "internal") {
2195    return HiddenVisibility;
2196  } else if (value == "protected") {
2197    // FIXME: diagnose if target does not support protected visibility
2198    return ProtectedVisibility;
2199  }
2200
2201  diags.Report(diag::err_drv_invalid_value)
2202    << arg->getAsString(args) << value;
2203  return DefaultVisibility;
2204}
2205
2206/// Check if input file kind and language standard are compatible.
2207static bool IsInputCompatibleWithStandard(InputKind IK,
2208                                          const LangStandard &S) {
2209  switch (IK.getLanguage()) {
2210  case InputKind::Unknown:
2211  case InputKind::LLVM_IR:
2212    llvm_unreachable("should not parse language flags for this input");
2213
2214  case InputKind::C:
2215  case InputKind::ObjC:
2216  case InputKind::RenderScript:
2217    return S.getLanguage() == InputKind::C;
2218
2219  case InputKind::OpenCL:
2220    return S.getLanguage() == InputKind::OpenCL;
2221
2222  case InputKind::CXX:
2223  case InputKind::ObjCXX:
2224    return S.getLanguage() == InputKind::CXX;
2225
2226  case InputKind::CUDA:
2227    // FIXME: What -std= values should be permitted for CUDA compilations?
2228    return S.getLanguage() == InputKind::CUDA ||
2229           S.getLanguage() == InputKind::CXX;
2230
2231  case InputKind::HIP:
2232    return S.getLanguage() == InputKind::CXX ||
2233           S.getLanguage() == InputKind::HIP;
2234
2235  case InputKind::Asm:
2236    // Accept (and ignore) all -std= values.
2237    // FIXME: The -std= value is not ignored; it affects the tokenization
2238    // and preprocessing rules if we're preprocessing this asm input.
2239    return true;
2240  }
2241
2242  llvm_unreachable("unexpected input language");
2243}
2244
2245/// Get language name for given input kind.
2246static const StringRef GetInputKindName(InputKind IK) {
2247  switch (IK.getLanguage()) {
2248  case InputKind::C:
2249    return "C";
2250  case InputKind::ObjC:
2251    return "Objective-C";
2252  case InputKind::CXX:
2253    return "C++";
2254  case InputKind::ObjCXX:
2255    return "Objective-C++";
2256  case InputKind::OpenCL:
2257    return "OpenCL";
2258  case InputKind::CUDA:
2259    return "CUDA";
2260  case InputKind::RenderScript:
2261    return "RenderScript";
2262  case InputKind::HIP:
2263    return "HIP";
2264
2265  case InputKind::Asm:
2266    return "Asm";
2267  case InputKind::LLVM_IR:
2268    return "LLVM IR";
2269
2270  case InputKind::Unknown:
2271    break;
2272  }
2273  llvm_unreachable("unknown input language");
2274}
2275
2276static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
2277                          const TargetOptions &TargetOpts,
2278                          PreprocessorOptions &PPOpts,
2279                          DiagnosticsEngine &Diags) {
2280  // FIXME: Cleanup per-file based stuff.
2281  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
2282  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
2283    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
2284#define LANGSTANDARD(id, name, lang, desc, features) \
2285      .Case(name, LangStandard::lang_##id)
2286#define LANGSTANDARD_ALIAS(id, alias) \
2287      .Case(alias, LangStandard::lang_##id)
2288#include "clang/Frontend/LangStandards.def"
2289      .Default(LangStandard::lang_unspecified);
2290    if (LangStd == LangStandard::lang_unspecified) {
2291      Diags.Report(diag::err_drv_invalid_value)
2292        << A->getAsString(Args) << A->getValue();
2293      // Report supported standards with short description.
2294      for (unsigned KindValue = 0;
2295           KindValue != LangStandard::lang_unspecified;
2296           ++KindValue) {
2297        const LangStandard &Std = LangStandard::getLangStandardForKind(
2298          static_cast<LangStandard::Kind>(KindValue));
2299        if (IsInputCompatibleWithStandard(IK, Std)) {
2300          auto Diag = Diags.Report(diag::note_drv_use_standard);
2301          Diag << Std.getName() << Std.getDescription();
2302          unsigned NumAliases = 0;
2303#define LANGSTANDARD(id, name, lang, desc, features)
2304#define LANGSTANDARD_ALIAS(id, alias) \
2305          if (KindValue == LangStandard::lang_##id) ++NumAliases;
2306#define LANGSTANDARD_ALIAS_DEPR(id, alias)
2307#include "clang/Frontend/LangStandards.def"
2308          Diag << NumAliases;
2309#define LANGSTANDARD(id, name, lang, desc, features)
2310#define LANGSTANDARD_ALIAS(id, alias) \
2311          if (KindValue == LangStandard::lang_##id) Diag << alias;
2312#define LANGSTANDARD_ALIAS_DEPR(id, alias)
2313#include "clang/Frontend/LangStandards.def"
2314        }
2315      }
2316    } else {
2317      // Valid standard, check to make sure language and standard are
2318      // compatible.
2319      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
2320      if (!IsInputCompatibleWithStandard(IK, Std)) {
2321        Diags.Report(diag::err_drv_argument_not_allowed_with)
2322          << A->getAsString(Args) << GetInputKindName(IK);
2323      }
2324    }
2325  }
2326
2327  if (Args.hasArg(OPT_fno_dllexport_inlines))
2328    Opts.DllExportInlines = false;
2329
2330  if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
2331    StringRef Name = A->getValue();
2332    if (Name == "full" || Name == "branch") {
2333      Opts.CFProtectionBranch = 1;
2334    }
2335  }
2336  // -cl-std only applies for OpenCL language standards.
2337  // Override the -std option in this case.
2338  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
2339    LangStandard::Kind OpenCLLangStd
2340      = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
2341        .Cases("cl", "CL", LangStandard::lang_opencl10)
2342        .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
2343        .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
2344        .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
2345        .Case("c++", LangStandard::lang_openclcpp)
2346        .Default(LangStandard::lang_unspecified);
2347
2348    if (OpenCLLangStd == LangStandard::lang_unspecified) {
2349      Diags.Report(diag::err_drv_invalid_value)
2350        << A->getAsString(Args) << A->getValue();
2351    }
2352    else
2353      LangStd = OpenCLLangStd;
2354  }
2355
2356  Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
2357
2358  llvm::Triple T(TargetOpts.Triple);
2359  CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
2360
2361  // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
2362  // This option should be deprecated for CL > 1.0 because
2363  // this option was added for compatibility with OpenCL 1.0.
2364  if (Args.getLastArg(OPT_cl_strict_aliasing)
2365       && Opts.OpenCLVersion > 100) {
2366    Diags.Report(diag::warn_option_invalid_ocl_version)
2367        << Opts.getOpenCLVersionTuple().getAsString()
2368        << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
2369  }
2370
2371  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
2372  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
2373  // while a subset (the non-C++ GNU keywords) is provided by GCC's
2374  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
2375  // name, as it doesn't seem a useful distinction.
2376  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
2377                                  Opts.GNUKeywords);
2378
2379  Opts.Digraphs = Args.hasFlag(OPT_fdigraphs, OPT_fno_digraphs, Opts.Digraphs);
2380
2381  if (Args.hasArg(OPT_fno_operator_names))
2382    Opts.CXXOperatorNames = 0;
2383
2384  if (Args.hasArg(OPT_fcuda_is_device))
2385    Opts.CUDAIsDevice = 1;
2386
2387  if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
2388    Opts.CUDAAllowVariadicFunctions = 1;
2389
2390  if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
2391    Opts.CUDAHostDeviceConstexpr = 0;
2392
2393  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
2394    Opts.CUDADeviceApproxTranscendentals = 1;
2395
2396  Opts.GPURelocatableDeviceCode = Args.hasArg(OPT_fgpu_rdc);
2397
2398  if (Opts.ObjC) {
2399    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
2400      StringRef value = arg->getValue();
2401      if (Opts.ObjCRuntime.tryParse(value))
2402        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
2403    }
2404
2405    if (Args.hasArg(OPT_fobjc_gc_only))
2406      Opts.setGC(LangOptions::GCOnly);
2407    else if (Args.hasArg(OPT_fobjc_gc))
2408      Opts.setGC(LangOptions::HybridGC);
2409    else if (Args.hasArg(OPT_fobjc_arc)) {
2410      Opts.ObjCAutoRefCount = 1;
2411      if (!Opts.ObjCRuntime.allowsARC())
2412        Diags.Report(diag::err_arc_unsupported_on_runtime);
2413    }
2414
2415    // ObjCWeakRuntime tracks whether the runtime supports __weak, not
2416    // whether the feature is actually enabled.  This is predominantly
2417    // determined by -fobjc-runtime, but we allow it to be overridden
2418    // from the command line for testing purposes.
2419    if (Args.hasArg(OPT_fobjc_runtime_has_weak))
2420      Opts.ObjCWeakRuntime = 1;
2421    else
2422      Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
2423
2424    // ObjCWeak determines whether __weak is actually enabled.
2425    // Note that we allow -fno-objc-weak to disable this even in ARC mode.
2426    if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
2427      if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
2428        assert(!Opts.ObjCWeak);
2429      } else if (Opts.getGC() != LangOptions::NonGC) {
2430        Diags.Report(diag::err_objc_weak_with_gc);
2431      } else if (!Opts.ObjCWeakRuntime) {
2432        Diags.Report(diag::err_objc_weak_unsupported);
2433      } else {
2434        Opts.ObjCWeak = 1;
2435      }
2436    } else if (Opts.ObjCAutoRefCount) {
2437      Opts.ObjCWeak = Opts.ObjCWeakRuntime;
2438    }
2439
2440    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
2441      Opts.ObjCInferRelatedResultType = 0;
2442
2443    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
2444      Opts.ObjCSubscriptingLegacyRuntime =
2445        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
2446  }
2447
2448  if (Args.hasArg(OPT_fgnu89_inline)) {
2449    if (Opts.CPlusPlus)
2450      Diags.Report(diag::err_drv_argument_not_allowed_with)
2451        << "-fgnu89-inline" << GetInputKindName(IK);
2452    else
2453      Opts.GNUInline = 1;
2454  }
2455
2456  if (Args.hasArg(OPT_fapple_kext)) {
2457    if (!Opts.CPlusPlus)
2458      Diags.Report(diag::warn_c_kext);
2459    else
2460      Opts.AppleKext = 1;
2461  }
2462
2463  if (Args.hasArg(OPT_print_ivar_layout))
2464    Opts.ObjCGCBitmapPrint = 1;
2465
2466  if (Args.hasArg(OPT_fno_constant_cfstrings))
2467    Opts.NoConstantCFStrings = 1;
2468  if (const auto *A = Args.getLastArg(OPT_fcf_runtime_abi_EQ))
2469    Opts.CFRuntime =
2470        llvm::StringSwitch<LangOptions::CoreFoundationABI>(A->getValue())
2471            .Cases("unspecified", "standalone", "objc",
2472                   LangOptions::CoreFoundationABI::ObjectiveC)
2473            .Cases("swift", "swift-5.0",
2474                   LangOptions::CoreFoundationABI::Swift5_0)
2475            .Case("swift-4.2", LangOptions::CoreFoundationABI::Swift4_2)
2476            .Case("swift-4.1", LangOptions::CoreFoundationABI::Swift4_1)
2477            .Default(LangOptions::CoreFoundationABI::ObjectiveC);
2478
2479  if (Args.hasArg(OPT_fzvector))
2480    Opts.ZVector = 1;
2481
2482  if (Args.hasArg(OPT_pthread))
2483    Opts.POSIXThreads = 1;
2484
2485  // The value-visibility mode defaults to "default".
2486  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
2487    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
2488  } else {
2489    Opts.setValueVisibilityMode(DefaultVisibility);
2490  }
2491
2492  // The type-visibility mode defaults to the value-visibility mode.
2493  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
2494    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
2495  } else {
2496    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
2497  }
2498
2499  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2500    Opts.InlineVisibilityHidden = 1;
2501
2502  if (Args.hasArg(OPT_fvisibility_global_new_delete_hidden))
2503    Opts.GlobalAllocationFunctionVisibilityHidden = 1;
2504
2505  if (Args.hasArg(OPT_ftrapv)) {
2506    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2507    // Set the handler, if one is specified.
2508    Opts.OverflowHandler =
2509        Args.getLastArgValue(OPT_ftrapv_handler);
2510  }
2511  else if (Args.hasArg(OPT_fwrapv))
2512    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2513
2514  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
2515  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
2516  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
2517  Opts.MSCompatibilityVersion = 0;
2518  if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
2519    VersionTuple VT;
2520    if (VT.tryParse(A->getValue()))
2521      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2522                                                << A->getValue();
2523    Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
2524                                  VT.getMinor().getValueOr(0) * 100000 +
2525                                  VT.getSubminor().getValueOr(0);
2526  }
2527
2528  // Mimicking gcc's behavior, trigraphs are only enabled if -trigraphs
2529  // is specified, or -std is set to a conforming mode.
2530  // Trigraphs are disabled by default in c++1z onwards.
2531  Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus17;
2532  Opts.Trigraphs =
2533      Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
2534
2535  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2536                                   OPT_fno_dollars_in_identifiers,
2537                                   Opts.DollarIdents);
2538  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2539  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
2540  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2541  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2542  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2543                                   Opts.ConstStrings);
2544  if (Args.hasArg(OPT_fno_lax_vector_conversions))
2545    Opts.LaxVectorConversions = 0;
2546  if (Args.hasArg(OPT_fno_threadsafe_statics))
2547    Opts.ThreadsafeStatics = 0;
2548  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2549  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2550  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2551
2552  // -ffixed-point
2553  Opts.FixedPoint =
2554      Args.hasFlag(OPT_ffixed_point, OPT_fno_fixed_point, /*Default=*/false) &&
2555      !Opts.CPlusPlus;
2556  Opts.PaddingOnUnsignedFixedPoint =
2557      Args.hasFlag(OPT_fpadding_on_unsigned_fixed_point,
2558                   OPT_fno_padding_on_unsigned_fixed_point,
2559                   /*Default=*/false) &&
2560      Opts.FixedPoint;
2561
2562  // Handle exception personalities
2563  Arg *A = Args.getLastArg(options::OPT_fsjlj_exceptions,
2564                           options::OPT_fseh_exceptions,
2565                           options::OPT_fdwarf_exceptions);
2566  if (A) {
2567    const Option &Opt = A->getOption();
2568    llvm::Triple T(TargetOpts.Triple);
2569    if (T.isWindowsMSVCEnvironment())
2570      Diags.Report(diag::err_fe_invalid_exception_model)
2571          << Opt.getName() << T.str();
2572
2573    Opts.SjLjExceptions = Opt.matches(options::OPT_fsjlj_exceptions);
2574    Opts.SEHExceptions = Opt.matches(options::OPT_fseh_exceptions);
2575    Opts.DWARFExceptions = Opt.matches(options::OPT_fdwarf_exceptions);
2576  }
2577
2578  Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
2579  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2580
2581  Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
2582  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
2583  Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
2584    && Opts.OpenCLVersion == 200);
2585  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2586  Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
2587
2588  // Enable [[]] attributes in C++11 by default.
2589  Opts.DoubleSquareBracketAttributes =
2590      Args.hasFlag(OPT_fdouble_square_bracket_attributes,
2591                   OPT_fno_double_square_bracket_attributes, Opts.CPlusPlus11);
2592
2593  Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
2594  Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
2595  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
2596  Opts.ModulesDeclUse =
2597      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
2598  Opts.ModulesLocalVisibility =
2599      Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
2600  Opts.ModulesCodegen = Args.hasArg(OPT_fmodules_codegen);
2601  Opts.ModulesDebugInfo = Args.hasArg(OPT_fmodules_debuginfo);
2602  Opts.ModulesSearchAll = Opts.Modules &&
2603    !Args.hasArg(OPT_fno_modules_search_all) &&
2604    Args.hasArg(OPT_fmodules_search_all);
2605  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
2606  Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
2607  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
2608  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2609  Opts.Char8 = Args.hasFlag(OPT_fchar8__t, OPT_fno_char8__t, Opts.CPlusPlus2a);
2610  if (const Arg *A = Args.getLastArg(OPT_fwchar_type_EQ)) {
2611    Opts.WCharSize = llvm::StringSwitch<unsigned>(A->getValue())
2612                         .Case("char", 1)
2613                         .Case("short", 2)
2614                         .Case("int", 4)
2615                         .Default(0);
2616    if (Opts.WCharSize == 0)
2617      Diags.Report(diag::err_fe_invalid_wchar_type) << A->getValue();
2618  }
2619  Opts.WCharIsSigned = Args.hasFlag(OPT_fsigned_wchar, OPT_fno_signed_wchar, true);
2620  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2621  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2622  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2623  if (!Opts.NoBuiltin)
2624    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
2625  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
2626  Opts.RelaxedTemplateTemplateArgs =
2627      Args.hasArg(OPT_frelaxed_template_template_args);
2628  Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
2629  Opts.AlignedAllocation =
2630      Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
2631                   Opts.AlignedAllocation);
2632  Opts.AlignedAllocationUnavailable =
2633      Opts.AlignedAllocation && Args.hasArg(OPT_aligned_alloc_unavailable);
2634  Opts.NewAlignOverride =
2635      getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
2636  if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
2637    Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
2638    Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
2639                                                 << A->getValue();
2640    Opts.NewAlignOverride = 0;
2641  }
2642  Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
2643  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2644  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2645  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2646  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
2647  Opts.InstantiationDepth =
2648      getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
2649  Opts.ArrowDepth =
2650      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
2651  Opts.ConstexprCallDepth =
2652      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
2653  Opts.ConstexprStepLimit =
2654      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
2655  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
2656  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2657  Opts.NumLargeByValueCopy =
2658      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
2659  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2660  Opts.ObjCConstantStringClass =
2661    Args.getLastArgValue(OPT_fconstant_string_class);
2662  Opts.ObjCDefaultSynthProperties =
2663    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
2664  Opts.EncodeExtendedBlockSig =
2665    Args.hasArg(OPT_fencode_extended_block_signature);
2666  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2667  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
2668  Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
2669  Opts.AlignDouble = Args.hasArg(OPT_malign_double);
2670  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2671  Opts.PIE = Args.hasArg(OPT_pic_is_pie);
2672  Opts.Static = Args.hasArg(OPT_static_define);
2673  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2674  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2675                        || Args.hasArg(OPT_fdump_record_layouts);
2676  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2677  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2678  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2679  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2680  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2681  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2682  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2683  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2684  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2685  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2686  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2687  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2688  Opts.ModuleName = Args.getLastArgValue(OPT_fmodule_name_EQ);
2689  Opts.CurrentModule = Opts.ModuleName;
2690  Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
2691  Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
2692  llvm::sort(Opts.ModuleFeatures);
2693  Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
2694  Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
2695  // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
2696  // is enabled.
2697  Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
2698                            | Opts.NativeHalfArgsAndReturns;
2699  Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
2700
2701  // __declspec is enabled by default for the PS4 by the driver, and also
2702  // enabled for Microsoft Extensions or Borland Extensions, here.
2703  //
2704  // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
2705  // CUDA extension. However, it is required for supporting
2706  // __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
2707  // been rewritten in terms of something more generic, remove the Opts.CUDA
2708  // term here.
2709  Opts.DeclSpecKeyword =
2710      Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
2711                   (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
2712
2713  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
2714    switch (llvm::StringSwitch<unsigned>(A->getValue())
2715      .Case("target", LangOptions::ASMM_Target)
2716      .Case("no", LangOptions::ASMM_Off)
2717      .Case("yes", LangOptions::ASMM_On)
2718      .Default(255)) {
2719    default:
2720      Diags.Report(diag::err_drv_invalid_value)
2721        << "-faddress-space-map-mangling=" << A->getValue();
2722      break;
2723    case LangOptions::ASMM_Target:
2724      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
2725      break;
2726    case LangOptions::ASMM_On:
2727      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
2728      break;
2729    case LangOptions::ASMM_Off:
2730      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
2731      break;
2732    }
2733  }
2734
2735  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
2736    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
2737        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
2738            A->getValue())
2739            .Case("single",
2740                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
2741            .Case("multiple",
2742                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2743            .Case("virtual",
2744                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2745            .Default(LangOptions::PPTMK_BestCase);
2746    if (InheritanceModel == LangOptions::PPTMK_BestCase)
2747      Diags.Report(diag::err_drv_invalid_value)
2748          << "-fms-memptr-rep=" << A->getValue();
2749
2750    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2751  }
2752
2753  // Check for MS default calling conventions being specified.
2754  if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2755    LangOptions::DefaultCallingConvention DefaultCC =
2756        llvm::StringSwitch<LangOptions::DefaultCallingConvention>(A->getValue())
2757            .Case("cdecl", LangOptions::DCC_CDecl)
2758            .Case("fastcall", LangOptions::DCC_FastCall)
2759            .Case("stdcall", LangOptions::DCC_StdCall)
2760            .Case("vectorcall", LangOptions::DCC_VectorCall)
2761            .Case("regcall", LangOptions::DCC_RegCall)
2762            .Default(LangOptions::DCC_None);
2763    if (DefaultCC == LangOptions::DCC_None)
2764      Diags.Report(diag::err_drv_invalid_value)
2765          << "-fdefault-calling-conv=" << A->getValue();
2766
2767    llvm::Triple T(TargetOpts.Triple);
2768    llvm::Triple::ArchType Arch = T.getArch();
2769    bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2770                      DefaultCC == LangOptions::DCC_StdCall) &&
2771                     Arch != llvm::Triple::x86;
2772    emitError |= (DefaultCC == LangOptions::DCC_VectorCall ||
2773                  DefaultCC == LangOptions::DCC_RegCall) &&
2774                 !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2775    if (emitError)
2776      Diags.Report(diag::err_drv_argument_not_allowed_with)
2777          << A->getSpelling() << T.getTriple();
2778    else
2779      Opts.setDefaultCallingConv(DefaultCC);
2780  }
2781
2782  // -mrtd option
2783  if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2784    if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2785      Diags.Report(diag::err_drv_argument_not_allowed_with)
2786          << A->getSpelling() << "-fdefault-calling-conv";
2787    else {
2788      llvm::Triple T(TargetOpts.Triple);
2789      if (T.getArch() != llvm::Triple::x86)
2790        Diags.Report(diag::err_drv_argument_not_allowed_with)
2791            << A->getSpelling() << T.getTriple();
2792      else
2793        Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2794    }
2795  }
2796
2797  // Check if -fopenmp is specified.
2798  Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2799  // Check if -fopenmp-simd is specified.
2800  bool IsSimdSpecified =
2801      Args.hasFlag(options::OPT_fopenmp_simd, options::OPT_fno_openmp_simd,
2802                   /*Default=*/false);
2803  Opts.OpenMPSimd = !Opts.OpenMP && IsSimdSpecified;
2804  Opts.OpenMPUseTLS =
2805      Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2806  Opts.OpenMPIsDevice =
2807      Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2808  bool IsTargetSpecified =
2809      Opts.OpenMPIsDevice || Args.hasArg(options::OPT_fopenmp_targets_EQ);
2810
2811  if (Opts.OpenMP || Opts.OpenMPSimd) {
2812    if (int Version = getLastArgIntValue(
2813            Args, OPT_fopenmp_version_EQ,
2814            (IsSimdSpecified || IsTargetSpecified) ? 45 : Opts.OpenMP, Diags))
2815      Opts.OpenMP = Version;
2816    else if (IsSimdSpecified || IsTargetSpecified)
2817      Opts.OpenMP = 45;
2818    // Provide diagnostic when a given target is not expected to be an OpenMP
2819    // device or host.
2820    if (!Opts.OpenMPIsDevice) {
2821      switch (T.getArch()) {
2822      default:
2823        break;
2824      // Add unsupported host targets here:
2825      case llvm::Triple::nvptx:
2826      case llvm::Triple::nvptx64:
2827        Diags.Report(diag::err_drv_omp_host_target_not_supported)
2828            << TargetOpts.Triple;
2829        break;
2830      }
2831    }
2832  }
2833
2834  // Set the flag to prevent the implementation from emitting device exception
2835  // handling code for those requiring so.
2836  Opts.OpenMPHostCXXExceptions = Opts.Exceptions && Opts.CXXExceptions;
2837  if ((Opts.OpenMPIsDevice && T.isNVPTX()) || Opts.OpenCLCPlusPlus) {
2838    Opts.Exceptions = 0;
2839    Opts.CXXExceptions = 0;
2840  }
2841  if (Opts.OpenMPIsDevice && T.isNVPTX()) {
2842    Opts.OpenMPCUDANumSMs =
2843        getLastArgIntValue(Args, options::OPT_fopenmp_cuda_number_of_sm_EQ,
2844                           Opts.OpenMPCUDANumSMs, Diags);
2845    Opts.OpenMPCUDABlocksPerSM =
2846        getLastArgIntValue(Args, options::OPT_fopenmp_cuda_blocks_per_sm_EQ,
2847                           Opts.OpenMPCUDABlocksPerSM, Diags);
2848  }
2849
2850  // Prevent auto-widening the representation of loop counters during an
2851  // OpenMP collapse clause.
2852  Opts.OpenMPOptimisticCollapse =
2853      Args.hasArg(options::OPT_fopenmp_optimistic_collapse) ? 1 : 0;
2854
2855  // Get the OpenMP target triples if any.
2856  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2857
2858    for (unsigned i = 0; i < A->getNumValues(); ++i) {
2859      llvm::Triple TT(A->getValue(i));
2860
2861      if (TT.getArch() == llvm::Triple::UnknownArch ||
2862          !(TT.getArch() == llvm::Triple::ppc ||
2863            TT.getArch() == llvm::Triple::ppc64 ||
2864            TT.getArch() == llvm::Triple::ppc64le ||
2865            TT.getArch() == llvm::Triple::nvptx ||
2866            TT.getArch() == llvm::Triple::nvptx64 ||
2867            TT.getArch() == llvm::Triple::x86 ||
2868            TT.getArch() == llvm::Triple::x86_64))
2869        Diags.Report(diag::err_drv_invalid_omp_target) << A->getValue(i);
2870      else
2871        Opts.OMPTargetTriples.push_back(TT);
2872    }
2873  }
2874
2875  // Get OpenMP host file path if any and report if a non existent file is
2876  // found
2877  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2878    Opts.OMPHostIRFile = A->getValue();
2879    if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2880      Diags.Report(diag::err_drv_omp_host_ir_file_not_found)
2881          << Opts.OMPHostIRFile;
2882  }
2883
2884  // Set CUDA mode for OpenMP target NVPTX if specified in options
2885  Opts.OpenMPCUDAMode = Opts.OpenMPIsDevice && T.isNVPTX() &&
2886                        Args.hasArg(options::OPT_fopenmp_cuda_mode);
2887
2888  // Set CUDA mode for OpenMP target NVPTX if specified in options
2889  Opts.OpenMPCUDAForceFullRuntime =
2890      Opts.OpenMPIsDevice && T.isNVPTX() &&
2891      Args.hasArg(options::OPT_fopenmp_cuda_force_full_runtime);
2892
2893  // Record whether the __DEPRECATED define was requested.
2894  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2895                                 OPT_fno_deprecated_macro,
2896                                 Opts.Deprecated);
2897
2898  // FIXME: Eliminate this dependency.
2899  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2900       OptSize = getOptimizationLevelSize(Args);
2901  Opts.Optimize = Opt != 0;
2902  Opts.OptimizeSize = OptSize != 0;
2903
2904  // This is the __NO_INLINE__ define, which just depends on things like the
2905  // optimization level and -fno-inline, not actually whether the backend has
2906  // inlining enabled.
2907  Opts.NoInlineDefine = !Opts.Optimize;
2908  if (Arg *InlineArg = Args.getLastArg(
2909          options::OPT_finline_functions, options::OPT_finline_hint_functions,
2910          options::OPT_fno_inline_functions, options::OPT_fno_inline))
2911    if (InlineArg->getOption().matches(options::OPT_fno_inline))
2912      Opts.NoInlineDefine = true;
2913
2914  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2915      Args.hasArg(OPT_cl_fast_relaxed_math);
2916  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2917      Args.hasArg(OPT_cl_finite_math_only) ||
2918      Args.hasArg(OPT_cl_fast_relaxed_math);
2919  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2920                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2921                      Args.hasArg(OPT_cl_fast_relaxed_math);
2922
2923  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2924    StringRef Val = A->getValue();
2925    if (Val == "fast")
2926      Opts.setDefaultFPContractMode(LangOptions::FPC_Fast);
2927    else if (Val == "on")
2928      Opts.setDefaultFPContractMode(LangOptions::FPC_On);
2929    else if (Val == "off")
2930      Opts.setDefaultFPContractMode(LangOptions::FPC_Off);
2931    else
2932      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2933  }
2934
2935  Opts.RetainCommentsFromSystemHeaders =
2936      Args.hasArg(OPT_fretain_comments_from_system_headers);
2937
2938  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2939  switch (SSP) {
2940  default:
2941    Diags.Report(diag::err_drv_invalid_value)
2942      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2943    break;
2944  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2945  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2946  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2947  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2948  }
2949
2950  if (Arg *A = Args.getLastArg(OPT_ftrivial_auto_var_init)) {
2951    StringRef Val = A->getValue();
2952    if (Val == "uninitialized")
2953      Opts.setTrivialAutoVarInit(
2954          LangOptions::TrivialAutoVarInitKind::Uninitialized);
2955    else if (Val == "zero")
2956      Opts.setTrivialAutoVarInit(LangOptions::TrivialAutoVarInitKind::Zero);
2957    else if (Val == "pattern")
2958      Opts.setTrivialAutoVarInit(LangOptions::TrivialAutoVarInitKind::Pattern);
2959    else
2960      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2961  }
2962
2963  // Parse -fsanitize= arguments.
2964  parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2965                      Diags, Opts.Sanitize);
2966  // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2967  Opts.SanitizeAddressFieldPadding =
2968      getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2969  Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2970
2971  // -fxray-instrument
2972  Opts.XRayInstrument =
2973      Args.hasFlag(OPT_fxray_instrument, OPT_fnoxray_instrument, false);
2974
2975  // -fxray-always-emit-customevents
2976  Opts.XRayAlwaysEmitCustomEvents =
2977      Args.hasFlag(OPT_fxray_always_emit_customevents,
2978                   OPT_fnoxray_always_emit_customevents, false);
2979
2980  // -fxray-always-emit-typedevents
2981  Opts.XRayAlwaysEmitTypedEvents =
2982      Args.hasFlag(OPT_fxray_always_emit_typedevents,
2983                   OPT_fnoxray_always_emit_customevents, false);
2984
2985  // -fxray-{always,never}-instrument= filenames.
2986  Opts.XRayAlwaysInstrumentFiles =
2987      Args.getAllArgValues(OPT_fxray_always_instrument);
2988  Opts.XRayNeverInstrumentFiles =
2989      Args.getAllArgValues(OPT_fxray_never_instrument);
2990  Opts.XRayAttrListFiles = Args.getAllArgValues(OPT_fxray_attr_list);
2991
2992  // -fforce-emit-vtables
2993  Opts.ForceEmitVTables = Args.hasArg(OPT_fforce_emit_vtables);
2994
2995  // -fallow-editor-placeholders
2996  Opts.AllowEditorPlaceholders = Args.hasArg(OPT_fallow_editor_placeholders);
2997
2998  Opts.RegisterStaticDestructors = !Args.hasArg(OPT_fno_cxx_static_destructors);
2999
3000  if (Arg *A = Args.getLastArg(OPT_fclang_abi_compat_EQ)) {
3001    Opts.setClangABICompat(LangOptions::ClangABI::Latest);
3002
3003    StringRef Ver = A->getValue();
3004    std::pair<StringRef, StringRef> VerParts = Ver.split('.');
3005    unsigned Major, Minor = 0;
3006
3007    // Check the version number is valid: either 3.x (0 <= x <= 9) or
3008    // y or y.0 (4 <= y <= current version).
3009    if (!VerParts.first.startswith("0") &&
3010        !VerParts.first.getAsInteger(10, Major) &&
3011        3 <= Major && Major <= CLANG_VERSION_MAJOR &&
3012        (Major == 3 ? VerParts.second.size() == 1 &&
3013                      !VerParts.second.getAsInteger(10, Minor)
3014                    : VerParts.first.size() == Ver.size() ||
3015                      VerParts.second == "0")) {
3016      // Got a valid version number.
3017      if (Major == 3 && Minor <= 8)
3018        Opts.setClangABICompat(LangOptions::ClangABI::Ver3_8);
3019      else if (Major <= 4)
3020        Opts.setClangABICompat(LangOptions::ClangABI::Ver4);
3021      else if (Major <= 6)
3022        Opts.setClangABICompat(LangOptions::ClangABI::Ver6);
3023      else if (Major <= 7)
3024        Opts.setClangABICompat(LangOptions::ClangABI::Ver7);
3025    } else if (Ver != "latest") {
3026      Diags.Report(diag::err_drv_invalid_value)
3027          << A->getAsString(Args) << A->getValue();
3028    }
3029  }
3030
3031  Opts.CompleteMemberPointers = Args.hasArg(OPT_fcomplete_member_pointers);
3032  Opts.BuildingPCHWithObjectFile = Args.hasArg(OPT_building_pch_with_obj);
3033}
3034
3035static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {
3036  switch (Action) {
3037  case frontend::ASTDeclList:
3038  case frontend::ASTDump:
3039  case frontend::ASTPrint:
3040  case frontend::ASTView:
3041  case frontend::EmitAssembly:
3042  case frontend::EmitBC:
3043  case frontend::EmitHTML:
3044  case frontend::EmitLLVM:
3045  case frontend::EmitLLVMOnly:
3046  case frontend::EmitCodeGenOnly:
3047  case frontend::EmitObj:
3048  case frontend::FixIt:
3049  case frontend::GenerateModule:
3050  case frontend::GenerateModuleInterface:
3051  case frontend::GenerateHeaderModule:
3052  case frontend::GeneratePCH:
3053  case frontend::ParseSyntaxOnly:
3054  case frontend::ModuleFileInfo:
3055  case frontend::VerifyPCH:
3056  case frontend::PluginAction:
3057  case frontend::RewriteObjC:
3058  case frontend::RewriteTest:
3059  case frontend::RunAnalysis:
3060  case frontend::TemplightDump:
3061  case frontend::MigrateSource:
3062    return false;
3063
3064  case frontend::DumpCompilerOptions:
3065  case frontend::DumpRawTokens:
3066  case frontend::DumpTokens:
3067  case frontend::InitOnly:
3068  case frontend::PrintPreamble:
3069  case frontend::PrintPreprocessedInput:
3070  case frontend::RewriteMacros:
3071  case frontend::RunPreprocessorOnly:
3072    return true;
3073  }
3074  llvm_unreachable("invalid frontend action");
3075}
3076
3077static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
3078                                  DiagnosticsEngine &Diags,
3079                                  frontend::ActionKind Action) {
3080  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
3081  Opts.PCHWithHdrStop = Args.hasArg(OPT_pch_through_hdrstop_create) ||
3082                        Args.hasArg(OPT_pch_through_hdrstop_use);
3083  Opts.PCHWithHdrStopCreate = Args.hasArg(OPT_pch_through_hdrstop_create);
3084  Opts.PCHThroughHeader = Args.getLastArgValue(OPT_pch_through_header_EQ);
3085  Opts.UsePredefines = !Args.hasArg(OPT_undef);
3086  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
3087  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
3088  Opts.AllowPCHWithCompilerErrors = Args.hasArg(OPT_fallow_pch_with_errors);
3089
3090  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
3091  for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
3092    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
3093
3094  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
3095    StringRef Value(A->getValue());
3096    size_t Comma = Value.find(',');
3097    unsigned Bytes = 0;
3098    unsigned EndOfLine = 0;
3099
3100    if (Comma == StringRef::npos ||
3101        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
3102        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
3103      Diags.Report(diag::err_drv_preamble_format);
3104    else {
3105      Opts.PrecompiledPreambleBytes.first = Bytes;
3106      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
3107    }
3108  }
3109
3110  // Add the __CET__ macro if a CFProtection option is set.
3111  if (const Arg *A = Args.getLastArg(OPT_fcf_protection_EQ)) {
3112    StringRef Name = A->getValue();
3113    if (Name == "branch")
3114      Opts.addMacroDef("__CET__=1");
3115    else if (Name == "return")
3116      Opts.addMacroDef("__CET__=2");
3117    else if (Name == "full")
3118      Opts.addMacroDef("__CET__=3");
3119  }
3120
3121  // Add macros from the command line.
3122  for (const auto *A : Args.filtered(OPT_D, OPT_U)) {
3123    if (A->getOption().matches(OPT_D))
3124      Opts.addMacroDef(A->getValue());
3125    else
3126      Opts.addMacroUndef(A->getValue());
3127  }
3128
3129  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
3130
3131  // Add the ordered list of -includes.
3132  for (const auto *A : Args.filtered(OPT_include))
3133    Opts.Includes.emplace_back(A->getValue());
3134
3135  for (const auto *A : Args.filtered(OPT_chain_include))
3136    Opts.ChainedIncludes.emplace_back(A->getValue());
3137
3138  for (const auto *A : Args.filtered(OPT_remap_file)) {
3139    std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
3140
3141    if (Split.second.empty()) {
3142      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
3143      continue;
3144    }
3145
3146    Opts.addRemappedFile(Split.first, Split.second);
3147  }
3148
3149  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
3150    StringRef Name = A->getValue();
3151    unsigned Library = llvm::StringSwitch<unsigned>(Name)
3152      .Case("libc++", ARCXX_libcxx)
3153      .Case("libstdc++", ARCXX_libstdcxx)
3154      .Case("none", ARCXX_nolib)
3155      .Default(~0U);
3156    if (Library == ~0U)
3157      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
3158    else
3159      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
3160  }
3161
3162  // Always avoid lexing editor placeholders when we're just running the
3163  // preprocessor as we never want to emit the
3164  // "editor placeholder in source file" error in PP only mode.
3165  if (isStrictlyPreprocessorAction(Action))
3166    Opts.LexEditorPlaceholders = false;
3167}
3168
3169static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
3170                                        ArgList &Args,
3171                                        frontend::ActionKind Action) {
3172  if (isStrictlyPreprocessorAction(Action))
3173    Opts.ShowCPP = !Args.hasArg(OPT_dM);
3174  else
3175    Opts.ShowCPP = 0;
3176
3177  Opts.ShowComments = Args.hasArg(OPT_C);
3178  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
3179  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
3180  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
3181  Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
3182  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
3183  Opts.RewriteImports = Args.hasArg(OPT_frewrite_imports);
3184  Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
3185}
3186
3187static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
3188                            DiagnosticsEngine &Diags) {
3189  Opts.CodeModel = getCodeModel(Args, Diags);
3190  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
3191  if (Arg *A = Args.getLastArg(OPT_meabi)) {
3192    StringRef Value = A->getValue();
3193    llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
3194                                 .Case("default", llvm::EABI::Default)
3195                                 .Case("4", llvm::EABI::EABI4)
3196                                 .Case("5", llvm::EABI::EABI5)
3197                                 .Case("gnu", llvm::EABI::GNU)
3198                                 .Default(llvm::EABI::Unknown);
3199    if (EABIVersion == llvm::EABI::Unknown)
3200      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
3201                                                << Value;
3202    else
3203      Opts.EABIVersion = EABIVersion;
3204  }
3205  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
3206  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
3207  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
3208  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
3209  Opts.Triple = Args.getLastArgValue(OPT_triple);
3210  // Use the default target triple if unspecified.
3211  if (Opts.Triple.empty())
3212    Opts.Triple = llvm::sys::getDefaultTargetTriple();
3213  Opts.Triple = llvm::Triple::normalize(Opts.Triple);
3214  Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
3215  Opts.ForceEnableInt128 = Args.hasArg(OPT_fforce_enable_int128);
3216  Opts.NVPTXUseShortPointers = Args.hasFlag(
3217      options::OPT_fcuda_short_ptr, options::OPT_fno_cuda_short_ptr, false);
3218  if (Arg *A = Args.getLastArg(options::OPT_target_sdk_version_EQ)) {
3219    llvm::VersionTuple Version;
3220    if (Version.tryParse(A->getValue()))
3221      Diags.Report(diag::err_drv_invalid_value)
3222          << A->getAsString(Args) << A->getValue();
3223    else
3224      Opts.SDKVersion = Version;
3225  }
3226}
3227
3228bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
3229                                        const char *const *ArgBegin,
3230                                        const char *const *ArgEnd,
3231                                        DiagnosticsEngine &Diags) {
3232  bool Success = true;
3233
3234  // Parse the arguments.
3235  std::unique_ptr<OptTable> Opts = createDriverOptTable();
3236  const unsigned IncludedFlagsBitmask = options::CC1Option;
3237  unsigned MissingArgIndex, MissingArgCount;
3238  InputArgList Args =
3239      Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
3240                      MissingArgCount, IncludedFlagsBitmask);
3241  LangOptions &LangOpts = *Res.getLangOpts();
3242
3243  // Check for missing argument error.
3244  if (MissingArgCount) {
3245    Diags.Report(diag::err_drv_missing_argument)
3246        << Args.getArgString(MissingArgIndex) << MissingArgCount;
3247    Success = false;
3248  }
3249
3250  // Issue errors on unknown arguments.
3251  for (const auto *A : Args.filtered(OPT_UNKNOWN)) {
3252    auto ArgString = A->getAsString(Args);
3253    std::string Nearest;
3254    if (Opts->findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
3255      Diags.Report(diag::err_drv_unknown_argument) << ArgString;
3256    else
3257      Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
3258          << ArgString << Nearest;
3259    Success = false;
3260  }
3261
3262  Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
3263  Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
3264  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
3265  Success &=
3266      ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
3267                          false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
3268  ParseCommentArgs(LangOpts.CommentOpts, Args);
3269  ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
3270  // FIXME: We shouldn't have to pass the DashX option around here
3271  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
3272                                      LangOpts.IsHeaderFile);
3273  ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
3274  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
3275                              Res.getTargetOpts(), Res.getFrontendOpts());
3276  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args,
3277                        Res.getFileSystemOpts().WorkingDir);
3278  llvm::Triple T(Res.getTargetOpts().Triple);
3279  if (DashX.getFormat() == InputKind::Precompiled ||
3280      DashX.getLanguage() == InputKind::LLVM_IR) {
3281    // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
3282    // PassManager in BackendUtil.cpp. They need to be initializd no matter
3283    // what the input type is.
3284    if (Args.hasArg(OPT_fobjc_arc))
3285      LangOpts.ObjCAutoRefCount = 1;
3286    // PIClevel and PIELevel are needed during code generation and this should be
3287    // set regardless of the input type.
3288    LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
3289    LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
3290    parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
3291                        Diags, LangOpts.Sanitize);
3292  } else {
3293    // Other LangOpts are only initialized when the input is not AST or LLVM IR.
3294    // FIXME: Should we really be calling this for an InputKind::Asm input?
3295    ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
3296                  Res.getPreprocessorOpts(), Diags);
3297    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
3298      LangOpts.ObjCExceptions = 1;
3299    if (T.isOSDarwin() && DashX.isPreprocessed()) {
3300      // Supress the darwin-specific 'stdlibcxx-not-found' diagnostic for
3301      // preprocessed input as we don't expect it to be used with -std=libc++
3302      // anyway.
3303      Res.getDiagnosticOpts().Warnings.push_back("no-stdlibcxx-not-found");
3304    }
3305  }
3306
3307  LangOpts.FunctionAlignment =
3308      getLastArgIntValue(Args, OPT_function_alignment, 0, Diags);
3309
3310  if (LangOpts.CUDA) {
3311    // During CUDA device-side compilation, the aux triple is the
3312    // triple used for host compilation.
3313    if (LangOpts.CUDAIsDevice)
3314      Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
3315  }
3316
3317  // Set the triple of the host for OpenMP device compile.
3318  if (LangOpts.OpenMPIsDevice)
3319    Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
3320
3321  // FIXME: Override value name discarding when asan or msan is used because the
3322  // backend passes depend on the name of the alloca in order to print out
3323  // names.
3324  Res.getCodeGenOpts().DiscardValueNames &=
3325      !LangOpts.Sanitize.has(SanitizerKind::Address) &&
3326      !LangOpts.Sanitize.has(SanitizerKind::KernelAddress) &&
3327      !LangOpts.Sanitize.has(SanitizerKind::Memory) &&
3328      !LangOpts.Sanitize.has(SanitizerKind::KernelMemory);
3329
3330  ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, Diags,
3331                        Res.getFrontendOpts().ProgramAction);
3332  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
3333                              Res.getFrontendOpts().ProgramAction);
3334
3335  // Turn on -Wspir-compat for SPIR target.
3336  auto Arch = T.getArch();
3337  if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
3338    Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
3339  }
3340
3341  // If sanitizer is enabled, disable OPT_ffine_grained_bitfield_accesses.
3342  if (Res.getCodeGenOpts().FineGrainedBitfieldAccesses &&
3343      !Res.getLangOpts()->Sanitize.empty()) {
3344    Res.getCodeGenOpts().FineGrainedBitfieldAccesses = false;
3345    Diags.Report(diag::warn_drv_fine_grained_bitfield_accesses_ignored);
3346  }
3347  return Success;
3348}
3349
3350std::string CompilerInvocation::getModuleHash() const {
3351  // Note: For QoI reasons, the things we use as a hash here should all be
3352  // dumped via the -module-info flag.
3353  using llvm::hash_code;
3354  using llvm::hash_value;
3355  using llvm::hash_combine;
3356
3357  // Start the signature with the compiler version.
3358  // FIXME: We'd rather use something more cryptographically sound than
3359  // CityHash, but this will do for now.
3360  hash_code code = hash_value(getClangFullRepositoryVersion());
3361
3362  // Extend the signature with the language options
3363#define LANGOPT(Name, Bits, Default, Description) \
3364   code = hash_combine(code, LangOpts->Name);
3365#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
3366  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
3367#define BENIGN_LANGOPT(Name, Bits, Default, Description)
3368#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
3369#include "clang/Basic/LangOptions.def"
3370
3371  for (StringRef Feature : LangOpts->ModuleFeatures)
3372    code = hash_combine(code, Feature);
3373
3374  // Extend the signature with the target options.
3375  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
3376                      TargetOpts->ABI);
3377  for (const auto &FeatureAsWritten : TargetOpts->FeaturesAsWritten)
3378    code = hash_combine(code, FeatureAsWritten);
3379
3380  // Extend the signature with preprocessor options.
3381  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
3382  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
3383  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
3384
3385  for (const auto &I : getPreprocessorOpts().Macros) {
3386    // If we're supposed to ignore this macro for the purposes of modules,
3387    // don't put it into the hash.
3388    if (!hsOpts.ModulesIgnoreMacros.empty()) {
3389      // Check whether we're ignoring this macro.
3390      StringRef MacroDef = I.first;
3391      if (hsOpts.ModulesIgnoreMacros.count(
3392              llvm::CachedHashString(MacroDef.split('=').first)))
3393        continue;
3394    }
3395
3396    code = hash_combine(code, I.first, I.second);
3397  }
3398
3399  // Extend the signature with the sysroot and other header search options.
3400  code = hash_combine(code, hsOpts.Sysroot,
3401                      hsOpts.ModuleFormat,
3402                      hsOpts.UseDebugInfo,
3403                      hsOpts.UseBuiltinIncludes,
3404                      hsOpts.UseStandardSystemIncludes,
3405                      hsOpts.UseStandardCXXIncludes,
3406                      hsOpts.UseLibcxx,
3407                      hsOpts.ModulesValidateDiagnosticOptions);
3408  code = hash_combine(code, hsOpts.ResourceDir);
3409
3410  // Extend the signature with the user build path.
3411  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
3412
3413  // Extend the signature with the module file extensions.
3414  const FrontendOptions &frontendOpts = getFrontendOpts();
3415  for (const auto &ext : frontendOpts.ModuleFileExtensions) {
3416    code = ext->hashExtension(code);
3417  }
3418
3419  // When compiling with -gmodules, also hash -fdebug-prefix-map as it
3420  // affects the debug info in the PCM.
3421  if (getCodeGenOpts().DebugTypeExtRefs)
3422    for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
3423      code = hash_combine(code, KeyValue.first, KeyValue.second);
3424
3425  // Extend the signature with the enabled sanitizers, if at least one is
3426  // enabled. Sanitizers which cannot affect AST generation aren't hashed.
3427  SanitizerSet SanHash = LangOpts->Sanitize;
3428  SanHash.clear(getPPTransparentSanitizers());
3429  if (!SanHash.empty())
3430    code = hash_combine(code, SanHash.Mask);
3431
3432  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
3433}
3434
3435template<typename IntTy>
3436static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
3437                                    IntTy Default,
3438                                    DiagnosticsEngine *Diags) {
3439  IntTy Res = Default;
3440  if (Arg *A = Args.getLastArg(Id)) {
3441    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
3442      if (Diags)
3443        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
3444                                                       << A->getValue();
3445    }
3446  }
3447  return Res;
3448}
3449
3450namespace clang {
3451
3452// Declared in clang/Frontend/Utils.h.
3453int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
3454                       DiagnosticsEngine *Diags) {
3455  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
3456}
3457
3458uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
3459                               uint64_t Default,
3460                               DiagnosticsEngine *Diags) {
3461  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
3462}
3463
3464IntrusiveRefCntPtr<llvm::vfs::FileSystem>
3465createVFSFromCompilerInvocation(const CompilerInvocation &CI,
3466                                DiagnosticsEngine &Diags) {
3467  return createVFSFromCompilerInvocation(CI, Diags,
3468                                         llvm::vfs::getRealFileSystem());
3469}
3470
3471IntrusiveRefCntPtr<llvm::vfs::FileSystem> createVFSFromCompilerInvocation(
3472    const CompilerInvocation &CI, DiagnosticsEngine &Diags,
3473    IntrusiveRefCntPtr<llvm::vfs::FileSystem> BaseFS) {
3474  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
3475    return BaseFS;
3476
3477  IntrusiveRefCntPtr<llvm::vfs::FileSystem> Result = BaseFS;
3478  // earlier vfs files are on the bottom
3479  for (const auto &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
3480    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
3481        Result->getBufferForFile(File);
3482    if (!Buffer) {
3483      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
3484      continue;
3485    }
3486
3487    IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getVFSFromYAML(
3488        std::move(Buffer.get()), /*DiagHandler*/ nullptr, File,
3489        /*DiagContext*/ nullptr, Result);
3490    if (!FS) {
3491      Diags.Report(diag::err_invalid_vfs_overlay) << File;
3492      continue;
3493    }
3494
3495    Result = FS;
3496  }
3497  return Result;
3498}
3499
3500} // namespace clang
3501