CompilerInvocation.cpp revision 314564 
1//===--- CompilerInvocation.cpp -------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Frontend/CompilerInvocation.h"
11#include "TestModuleFileExtension.h"
12#include "clang/Basic/Builtins.h"
13#include "clang/Basic/FileManager.h"
14#include "clang/Basic/Version.h"
15#include "clang/Config/config.h"
16#include "clang/Driver/DriverDiagnostic.h"
17#include "clang/Driver/Options.h"
18#include "clang/Driver/Util.h"
19#include "clang/Frontend/FrontendDiagnostic.h"
20#include "clang/Frontend/LangStandard.h"
21#include "clang/Frontend/Utils.h"
22#include "clang/Lex/HeaderSearchOptions.h"
23#include "clang/Lex/PreprocessorOptions.h"
24#include "clang/Serialization/ASTReader.h"
25#include "clang/Serialization/ModuleFileExtension.h"
26#include "llvm/ADT/Hashing.h"
27#include "llvm/ADT/STLExtras.h"
28#include "llvm/ADT/SmallVector.h"
29#include "llvm/ADT/StringExtras.h"
30#include "llvm/ADT/StringSwitch.h"
31#include "llvm/ADT/Triple.h"
32#include "llvm/Linker/Linker.h"
33#include "llvm/Option/Arg.h"
34#include "llvm/Option/ArgList.h"
35#include "llvm/Option/OptTable.h"
36#include "llvm/Option/Option.h"
37#include "llvm/ProfileData/InstrProfReader.h"
38#include "llvm/Support/CodeGen.h"
39#include "llvm/Support/ErrorHandling.h"
40#include "llvm/Support/FileSystem.h"
41#include "llvm/Support/Host.h"
42#include "llvm/Support/Path.h"
43#include "llvm/Support/Process.h"
44#include "llvm/Target/TargetOptions.h"
45#include "llvm/Support/ScopedPrinter.h"
46#include <atomic>
47#include <memory>
48#include <sys/stat.h>
49#include <system_error>
50using namespace clang;
51
52//===----------------------------------------------------------------------===//
53// Initialization.
54//===----------------------------------------------------------------------===//
55
56CompilerInvocationBase::CompilerInvocationBase()
57  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
58    DiagnosticOpts(new DiagnosticOptions()),
59    HeaderSearchOpts(new HeaderSearchOptions()),
60    PreprocessorOpts(new PreprocessorOptions()) {}
61
62CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
63    : LangOpts(new LangOptions(*X.getLangOpts())),
64      TargetOpts(new TargetOptions(X.getTargetOpts())),
65      DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())),
66      HeaderSearchOpts(new HeaderSearchOptions(X.getHeaderSearchOpts())),
67      PreprocessorOpts(new PreprocessorOptions(X.getPreprocessorOpts())) {}
68
69CompilerInvocationBase::~CompilerInvocationBase() {}
70
71//===----------------------------------------------------------------------===//
72// Deserialization (from args)
73//===----------------------------------------------------------------------===//
74
75using namespace clang::driver;
76using namespace clang::driver::options;
77using namespace llvm::opt;
78
79//
80
81static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
82                                     DiagnosticsEngine &Diags) {
83  unsigned DefaultOpt = 0;
84  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
85    DefaultOpt = 2;
86
87  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
88    if (A->getOption().matches(options::OPT_O0))
89      return 0;
90
91    if (A->getOption().matches(options::OPT_Ofast))
92      return 3;
93
94    assert (A->getOption().matches(options::OPT_O));
95
96    StringRef S(A->getValue());
97    if (S == "s" || S == "z" || S.empty())
98      return 2;
99
100    if (S == "g")
101      return 1;
102
103    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
104  }
105
106  return DefaultOpt;
107}
108
109static unsigned getOptimizationLevelSize(ArgList &Args) {
110  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
111    if (A->getOption().matches(options::OPT_O)) {
112      switch (A->getValue()[0]) {
113      default:
114        return 0;
115      case 's':
116        return 1;
117      case 'z':
118        return 2;
119      }
120    }
121  }
122  return 0;
123}
124
125static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
126                              OptSpecifier GroupWithValue,
127                              std::vector<std::string> &Diagnostics) {
128  for (Arg *A : Args.filtered(Group)) {
129    if (A->getOption().getKind() == Option::FlagClass) {
130      // The argument is a pure flag (such as OPT_Wall or OPT_Wdeprecated). Add
131      // its name (minus the "W" or "R" at the beginning) to the warning list.
132      Diagnostics.push_back(A->getOption().getName().drop_front(1));
133    } else if (A->getOption().matches(GroupWithValue)) {
134      // This is -Wfoo= or -Rfoo=, where foo is the name of the diagnostic group.
135      Diagnostics.push_back(A->getOption().getName().drop_front(1).rtrim("=-"));
136    } else {
137      // Otherwise, add its value (for OPT_W_Joined and similar).
138      for (const char *Arg : A->getValues())
139        Diagnostics.emplace_back(Arg);
140    }
141  }
142}
143
144static void getAllNoBuiltinFuncValues(ArgList &Args,
145                                      std::vector<std::string> &Funcs) {
146  SmallVector<const char *, 8> Values;
147  for (const auto &Arg : Args) {
148    const Option &O = Arg->getOption();
149    if (O.matches(options::OPT_fno_builtin_)) {
150      const char *FuncName = Arg->getValue();
151      if (Builtin::Context::isBuiltinFunc(FuncName))
152        Values.push_back(FuncName);
153    }
154  }
155  Funcs.insert(Funcs.end(), Values.begin(), Values.end());
156}
157
158static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
159                              DiagnosticsEngine &Diags) {
160  using namespace options;
161  bool Success = true;
162  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
163    StringRef Name = A->getValue();
164    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
165#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
166      .Case(CMDFLAG, NAME##Model)
167#include "clang/StaticAnalyzer/Core/Analyses.def"
168      .Default(NumStores);
169    if (Value == NumStores) {
170      Diags.Report(diag::err_drv_invalid_value)
171        << A->getAsString(Args) << Name;
172      Success = false;
173    } else {
174      Opts.AnalysisStoreOpt = Value;
175    }
176  }
177
178  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
179    StringRef Name = A->getValue();
180    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
181#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
182      .Case(CMDFLAG, NAME##Model)
183#include "clang/StaticAnalyzer/Core/Analyses.def"
184      .Default(NumConstraints);
185    if (Value == NumConstraints) {
186      Diags.Report(diag::err_drv_invalid_value)
187        << A->getAsString(Args) << Name;
188      Success = false;
189    } else {
190      Opts.AnalysisConstraintsOpt = Value;
191    }
192  }
193
194  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
195    StringRef Name = A->getValue();
196    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
197#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
198      .Case(CMDFLAG, PD_##NAME)
199#include "clang/StaticAnalyzer/Core/Analyses.def"
200      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
201    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
202      Diags.Report(diag::err_drv_invalid_value)
203        << A->getAsString(Args) << Name;
204      Success = false;
205    } else {
206      Opts.AnalysisDiagOpt = Value;
207    }
208  }
209
210  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
211    StringRef Name = A->getValue();
212    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
213#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
214      .Case(CMDFLAG, NAME)
215#include "clang/StaticAnalyzer/Core/Analyses.def"
216      .Default(NumPurgeModes);
217    if (Value == NumPurgeModes) {
218      Diags.Report(diag::err_drv_invalid_value)
219        << A->getAsString(Args) << Name;
220      Success = false;
221    } else {
222      Opts.AnalysisPurgeOpt = Value;
223    }
224  }
225
226  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
227    StringRef Name = A->getValue();
228    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
229#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
230      .Case(CMDFLAG, NAME)
231#include "clang/StaticAnalyzer/Core/Analyses.def"
232      .Default(NumInliningModes);
233    if (Value == NumInliningModes) {
234      Diags.Report(diag::err_drv_invalid_value)
235        << A->getAsString(Args) << Name;
236      Success = false;
237    } else {
238      Opts.InliningMode = Value;
239    }
240  }
241
242  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
243  Opts.ShowEnabledCheckerList = Args.hasArg(OPT_analyzer_list_enabled_checkers);
244  Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
245
246  Opts.visualizeExplodedGraphWithGraphViz =
247    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
248  Opts.visualizeExplodedGraphWithUbiGraph =
249    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
250  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
251  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
252  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
253  Opts.AnalyzeNestedBlocks =
254    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
255  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
256  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
257  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
258  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
259  Opts.maxBlockVisitOnPath =
260      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
261  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
262  Opts.InlineMaxStackDepth =
263      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
264                         Opts.InlineMaxStackDepth, Diags);
265
266  Opts.CheckersControlList.clear();
267  for (const Arg *A :
268       Args.filtered(OPT_analyzer_checker, OPT_analyzer_disable_checker)) {
269    A->claim();
270    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
271    // We can have a list of comma separated checker names, e.g:
272    // '-analyzer-checker=cocoa,unix'
273    StringRef checkerList = A->getValue();
274    SmallVector<StringRef, 4> checkers;
275    checkerList.split(checkers, ",");
276    for (StringRef checker : checkers)
277      Opts.CheckersControlList.emplace_back(checker, enable);
278  }
279
280  // Go through the analyzer configuration options.
281  for (const Arg *A : Args.filtered(OPT_analyzer_config)) {
282    A->claim();
283    // We can have a list of comma separated config names, e.g:
284    // '-analyzer-config key1=val1,key2=val2'
285    StringRef configList = A->getValue();
286    SmallVector<StringRef, 4> configVals;
287    configList.split(configVals, ",");
288    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
289      StringRef key, val;
290      std::tie(key, val) = configVals[i].split("=");
291      if (val.empty()) {
292        Diags.Report(SourceLocation(),
293                     diag::err_analyzer_config_no_value) << configVals[i];
294        Success = false;
295        break;
296      }
297      if (val.find('=') != StringRef::npos) {
298        Diags.Report(SourceLocation(),
299                     diag::err_analyzer_config_multiple_values)
300          << configVals[i];
301        Success = false;
302        break;
303      }
304      Opts.Config[key] = val;
305    }
306  }
307
308  return Success;
309}
310
311static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
312  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
313  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
314  return true;
315}
316
317static void ParseCommentArgs(CommentOptions &Opts, ArgList &Args) {
318  Opts.BlockCommandNames = Args.getAllArgValues(OPT_fcomment_block_commands);
319  Opts.ParseAllComments = Args.hasArg(OPT_fparse_all_comments);
320}
321
322static StringRef getCodeModel(ArgList &Args, DiagnosticsEngine &Diags) {
323  if (Arg *A = Args.getLastArg(OPT_mcode_model)) {
324    StringRef Value = A->getValue();
325    if (Value == "small" || Value == "kernel" || Value == "medium" ||
326        Value == "large")
327      return Value;
328    Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Value;
329  }
330  return "default";
331}
332
333/// \brief Create a new Regex instance out of the string value in \p RpassArg.
334/// It returns a pointer to the newly generated Regex instance.
335static std::shared_ptr<llvm::Regex>
336GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
337                                Arg *RpassArg) {
338  StringRef Val = RpassArg->getValue();
339  std::string RegexError;
340  std::shared_ptr<llvm::Regex> Pattern = std::make_shared<llvm::Regex>(Val);
341  if (!Pattern->isValid(RegexError)) {
342    Diags.Report(diag::err_drv_optimization_remark_pattern)
343        << RegexError << RpassArg->getAsString(Args);
344    Pattern.reset();
345  }
346  return Pattern;
347}
348
349static bool parseDiagnosticLevelMask(StringRef FlagName,
350                                     const std::vector<std::string> &Levels,
351                                     DiagnosticsEngine *Diags,
352                                     DiagnosticLevelMask &M) {
353  bool Success = true;
354  for (const auto &Level : Levels) {
355    DiagnosticLevelMask const PM =
356      llvm::StringSwitch<DiagnosticLevelMask>(Level)
357        .Case("note",    DiagnosticLevelMask::Note)
358        .Case("remark",  DiagnosticLevelMask::Remark)
359        .Case("warning", DiagnosticLevelMask::Warning)
360        .Case("error",   DiagnosticLevelMask::Error)
361        .Default(DiagnosticLevelMask::None);
362    if (PM == DiagnosticLevelMask::None) {
363      Success = false;
364      if (Diags)
365        Diags->Report(diag::err_drv_invalid_value) << FlagName << Level;
366    }
367    M = M | PM;
368  }
369  return Success;
370}
371
372static void parseSanitizerKinds(StringRef FlagName,
373                                const std::vector<std::string> &Sanitizers,
374                                DiagnosticsEngine &Diags, SanitizerSet &S) {
375  for (const auto &Sanitizer : Sanitizers) {
376    SanitizerMask K = parseSanitizerValue(Sanitizer, /*AllowGroups=*/false);
377    if (K == 0)
378      Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
379    else
380      S.set(K, true);
381  }
382}
383
384// Set the profile kind for fprofile-instrument.
385static void setPGOInstrumentor(CodeGenOptions &Opts, ArgList &Args,
386                               DiagnosticsEngine &Diags) {
387  Arg *A = Args.getLastArg(OPT_fprofile_instrument_EQ);
388  if (A == nullptr)
389    return;
390  StringRef S = A->getValue();
391  unsigned I = llvm::StringSwitch<unsigned>(S)
392                   .Case("none", CodeGenOptions::ProfileNone)
393                   .Case("clang", CodeGenOptions::ProfileClangInstr)
394                   .Case("llvm", CodeGenOptions::ProfileIRInstr)
395                   .Default(~0U);
396  if (I == ~0U) {
397    Diags.Report(diag::err_drv_invalid_pgo_instrumentor) << A->getAsString(Args)
398                                                         << S;
399    return;
400  }
401  CodeGenOptions::ProfileInstrKind Instrumentor =
402      static_cast<CodeGenOptions::ProfileInstrKind>(I);
403  Opts.setProfileInstr(Instrumentor);
404}
405
406// Set the profile kind using fprofile-instrument-use-path.
407static void setPGOUseInstrumentor(CodeGenOptions &Opts,
408                                  const Twine &ProfileName) {
409  auto ReaderOrErr = llvm::IndexedInstrProfReader::create(ProfileName);
410  // In error, return silently and let Clang PGOUse report the error message.
411  if (auto E = ReaderOrErr.takeError()) {
412    llvm::consumeError(std::move(E));
413    Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
414    return;
415  }
416  std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader =
417    std::move(ReaderOrErr.get());
418  if (PGOReader->isIRLevelProfile())
419    Opts.setProfileUse(CodeGenOptions::ProfileIRInstr);
420  else
421    Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
422}
423
424static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
425                             DiagnosticsEngine &Diags,
426                             const TargetOptions &TargetOpts) {
427  using namespace options;
428  bool Success = true;
429  llvm::Triple Triple = llvm::Triple(TargetOpts.Triple);
430
431  unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
432  // TODO: This could be done in Driver
433  unsigned MaxOptLevel = 3;
434  if (OptimizationLevel > MaxOptLevel) {
435    // If the optimization level is not supported, fall back on the default
436    // optimization
437    Diags.Report(diag::warn_drv_optimization_value)
438        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
439    OptimizationLevel = MaxOptLevel;
440  }
441  Opts.OptimizationLevel = OptimizationLevel;
442
443  // At O0 we want to fully disable inlining outside of cases marked with
444  // 'alwaysinline' that are required for correctness.
445  Opts.setInlining((Opts.OptimizationLevel == 0)
446                       ? CodeGenOptions::OnlyAlwaysInlining
447                       : CodeGenOptions::NormalInlining);
448  // Explicit inlining flags can disable some or all inlining even at
449  // optimization levels above zero.
450  if (Arg *InlineArg = Args.getLastArg(
451          options::OPT_finline_functions, options::OPT_finline_hint_functions,
452          options::OPT_fno_inline_functions, options::OPT_fno_inline)) {
453    if (Opts.OptimizationLevel > 0) {
454      const Option &InlineOpt = InlineArg->getOption();
455      if (InlineOpt.matches(options::OPT_finline_functions))
456        Opts.setInlining(CodeGenOptions::NormalInlining);
457      else if (InlineOpt.matches(options::OPT_finline_hint_functions))
458        Opts.setInlining(CodeGenOptions::OnlyHintInlining);
459      else
460        Opts.setInlining(CodeGenOptions::OnlyAlwaysInlining);
461    }
462  }
463
464  Opts.ExperimentalNewPassManager = Args.hasFlag(
465      OPT_fexperimental_new_pass_manager, OPT_fno_experimental_new_pass_manager,
466      /* Default */ false);
467
468  if (Arg *A = Args.getLastArg(OPT_fveclib)) {
469    StringRef Name = A->getValue();
470    if (Name == "Accelerate")
471      Opts.setVecLib(CodeGenOptions::Accelerate);
472    else if (Name == "SVML")
473      Opts.setVecLib(CodeGenOptions::SVML);
474    else if (Name == "none")
475      Opts.setVecLib(CodeGenOptions::NoLibrary);
476    else
477      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
478  }
479
480  if (Arg *A = Args.getLastArg(OPT_debug_info_kind_EQ)) {
481    unsigned Val =
482        llvm::StringSwitch<unsigned>(A->getValue())
483            .Case("line-tables-only", codegenoptions::DebugLineTablesOnly)
484            .Case("limited", codegenoptions::LimitedDebugInfo)
485            .Case("standalone", codegenoptions::FullDebugInfo)
486            .Default(~0U);
487    if (Val == ~0U)
488      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
489                                                << A->getValue();
490    else
491      Opts.setDebugInfo(static_cast<codegenoptions::DebugInfoKind>(Val));
492  }
493  if (Arg *A = Args.getLastArg(OPT_debugger_tuning_EQ)) {
494    unsigned Val = llvm::StringSwitch<unsigned>(A->getValue())
495                       .Case("gdb", unsigned(llvm::DebuggerKind::GDB))
496                       .Case("lldb", unsigned(llvm::DebuggerKind::LLDB))
497                       .Case("sce", unsigned(llvm::DebuggerKind::SCE))
498                       .Default(~0U);
499    if (Val == ~0U)
500      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
501                                                << A->getValue();
502    else
503      Opts.setDebuggerTuning(static_cast<llvm::DebuggerKind>(Val));
504  }
505  Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 0, Diags);
506  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
507  Opts.EmitCodeView = Args.hasArg(OPT_gcodeview);
508  Opts.WholeProgramVTables = Args.hasArg(OPT_fwhole_program_vtables);
509  Opts.LTOVisibilityPublicStd = Args.hasArg(OPT_flto_visibility_public_std);
510  Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
511  Opts.SplitDwarfInlining = !Args.hasArg(OPT_fno_split_dwarf_inlining);
512  Opts.DebugTypeExtRefs = Args.hasArg(OPT_dwarf_ext_refs);
513  Opts.DebugExplicitImport = Triple.isPS4CPU();
514
515  for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ))
516    Opts.DebugPrefixMap.insert(StringRef(Arg).split('='));
517
518  if (const Arg *A =
519          Args.getLastArg(OPT_emit_llvm_uselists, OPT_no_emit_llvm_uselists))
520    Opts.EmitLLVMUseLists = A->getOption().getID() == OPT_emit_llvm_uselists;
521
522  Opts.DisableLLVMPasses = Args.hasArg(OPT_disable_llvm_passes);
523  Opts.DisableLifetimeMarkers = Args.hasArg(OPT_disable_lifetimemarkers);
524  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
525  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
526  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
527    OPT_fuse_register_sized_bitfield_access);
528  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
529  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
530  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
531  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
532  Opts.NoCommon = Args.hasArg(OPT_fno_common);
533  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
534  Opts.OptimizeSize = getOptimizationLevelSize(Args);
535  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
536                            Args.hasArg(OPT_ffreestanding));
537  if (Opts.SimplifyLibCalls)
538    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
539  Opts.UnrollLoops =
540      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
541                   (Opts.OptimizationLevel > 1));
542  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
543
544  Opts.DisableIntegratedAS = Args.hasArg(OPT_fno_integrated_as);
545  Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
546  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
547
548  setPGOInstrumentor(Opts, Args, Diags);
549  Opts.InstrProfileOutput =
550      Args.getLastArgValue(OPT_fprofile_instrument_path_EQ);
551  Opts.ProfileInstrumentUsePath =
552      Args.getLastArgValue(OPT_fprofile_instrument_use_path_EQ);
553  if (!Opts.ProfileInstrumentUsePath.empty())
554    setPGOUseInstrumentor(Opts, Opts.ProfileInstrumentUsePath);
555
556  Opts.CoverageMapping =
557      Args.hasFlag(OPT_fcoverage_mapping, OPT_fno_coverage_mapping, false);
558  Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
559  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
560  Opts.PreserveAsmComments = !Args.hasArg(OPT_fno_preserve_as_comments);
561  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
562  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
563  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
564  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
565  Opts.CodeModel = getCodeModel(Args, Diags);
566  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
567  Opts.DisableFPElim =
568      (Args.hasArg(OPT_mdisable_fp_elim) || Args.hasArg(OPT_pg));
569  Opts.DisableFree = Args.hasArg(OPT_disable_free);
570  Opts.DiscardValueNames = Args.hasArg(OPT_discard_value_names);
571  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
572  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
573  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
574  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
575  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
576                       Args.hasArg(OPT_cl_finite_math_only) ||
577                       Args.hasArg(OPT_cl_fast_relaxed_math));
578  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
579                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
580                       Args.hasArg(OPT_cl_finite_math_only) ||
581                       Args.hasArg(OPT_cl_fast_relaxed_math));
582  Opts.NoSignedZeros = (Args.hasArg(OPT_fno_signed_zeros) ||
583                        Args.hasArg(OPT_cl_no_signed_zeros));
584  Opts.FlushDenorm = Args.hasArg(OPT_cl_denorms_are_zero);
585  Opts.CorrectlyRoundedDivSqrt =
586      Args.hasArg(OPT_cl_fp32_correctly_rounded_divide_sqrt);
587  Opts.ReciprocalMath = Args.hasArg(OPT_freciprocal_math);
588  Opts.NoTrappingMath = Args.hasArg(OPT_fno_trapping_math);
589  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
590  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
591  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
592  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
593  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
594  Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
595  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
596  Opts.IncrementalLinkerCompatible =
597      Args.hasArg(OPT_mincremental_linker_compatible);
598  Opts.PIECopyRelocations =
599      Args.hasArg(OPT_mpie_copy_relocations);
600  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
601  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
602  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
603  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
604  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
605  Opts.StrictReturn = !Args.hasArg(OPT_fno_strict_return);
606  Opts.StrictVTablePointers = Args.hasArg(OPT_fstrict_vtable_pointers);
607  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
608                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
609                      Args.hasArg(OPT_cl_fast_relaxed_math);
610  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
611  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
612  Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
613  if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
614    Diags.Report(diag::err_drv_invalid_value)
615        << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
616        << Opts.ThreadModel;
617  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
618  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
619
620  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
621                                       OPT_fno_function_sections, false);
622  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
623                                   OPT_fno_data_sections, false);
624  Opts.UniqueSectionNames = Args.hasFlag(OPT_funique_section_names,
625                                         OPT_fno_unique_section_names, true);
626
627  Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
628
629  Opts.NoUseJumpTables = Args.hasArg(OPT_fno_jump_tables);
630
631  Opts.PrepareForLTO = Args.hasArg(OPT_flto, OPT_flto_EQ);
632  const Arg *A = Args.getLastArg(OPT_flto, OPT_flto_EQ);
633  Opts.EmitSummaryIndex = A && A->containsValue("thin");
634  if (Arg *A = Args.getLastArg(OPT_fthinlto_index_EQ)) {
635    if (IK != IK_LLVM_IR)
636      Diags.Report(diag::err_drv_argument_only_allowed_with)
637          << A->getAsString(Args) << "-x ir";
638    Opts.ThinLTOIndexFile = Args.getLastArgValue(OPT_fthinlto_index_EQ);
639  }
640
641  Opts.MSVolatile = Args.hasArg(OPT_fms_volatile);
642
643  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
644  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
645  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
646
647  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
648  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
649
650  Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
651  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
652  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
653  if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
654    Opts.CoverageDataFile = Args.getLastArgValue(OPT_coverage_data_file);
655    Opts.CoverageNotesFile = Args.getLastArgValue(OPT_coverage_notes_file);
656    Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
657    Opts.CoverageNoFunctionNamesInData =
658        Args.hasArg(OPT_coverage_no_function_names_in_data);
659    Opts.CoverageExitBlockBeforeBody =
660        Args.hasArg(OPT_coverage_exit_block_before_body);
661    if (Args.hasArg(OPT_coverage_version_EQ)) {
662      StringRef CoverageVersion = Args.getLastArgValue(OPT_coverage_version_EQ);
663      if (CoverageVersion.size() != 4) {
664        Diags.Report(diag::err_drv_invalid_value)
665            << Args.getLastArg(OPT_coverage_version_EQ)->getAsString(Args)
666            << CoverageVersion;
667      } else {
668        memcpy(Opts.CoverageVersion, CoverageVersion.data(), 4);
669      }
670    }
671  }
672	// Handle -fembed-bitcode option.
673  if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
674    StringRef Name = A->getValue();
675    unsigned Model = llvm::StringSwitch<unsigned>(Name)
676        .Case("off", CodeGenOptions::Embed_Off)
677        .Case("all", CodeGenOptions::Embed_All)
678        .Case("bitcode", CodeGenOptions::Embed_Bitcode)
679        .Case("marker", CodeGenOptions::Embed_Marker)
680        .Default(~0U);
681    if (Model == ~0U) {
682      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
683      Success = false;
684    } else
685      Opts.setEmbedBitcode(
686          static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
687  }
688  // FIXME: For backend options that are not yet recorded as function
689  // attributes in the IR, keep track of them so we can embed them in a
690  // separate data section and use them when building the bitcode.
691  if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
692    for (const auto &A : Args) {
693      // Do not encode output and input.
694      if (A->getOption().getID() == options::OPT_o ||
695          A->getOption().getID() == options::OPT_INPUT ||
696          A->getOption().getID() == options::OPT_x ||
697          A->getOption().getID() == options::OPT_fembed_bitcode ||
698          (A->getOption().getGroup().isValid() &&
699           A->getOption().getGroup().getID() == options::OPT_W_Group))
700        continue;
701      ArgStringList ASL;
702      A->render(Args, ASL);
703      for (const auto &arg : ASL) {
704        StringRef ArgStr(arg);
705        Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
706        // using \00 to seperate each commandline options.
707        Opts.CmdArgs.push_back('\0');
708      }
709    }
710  }
711
712  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
713  Opts.XRayInstrumentFunctions = Args.hasArg(OPT_fxray_instrument);
714  Opts.XRayInstructionThreshold =
715      getLastArgIntValue(Args, OPT_fxray_instruction_threshold_, 200, Diags);
716  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
717  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
718  Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
719  Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
720  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
721  for (auto A : Args.filtered(OPT_mlink_bitcode_file, OPT_mlink_cuda_bitcode)) {
722    unsigned LinkFlags = llvm::Linker::Flags::None;
723    if (A->getOption().matches(OPT_mlink_cuda_bitcode))
724      LinkFlags = llvm::Linker::Flags::LinkOnlyNeeded |
725                  llvm::Linker::Flags::InternalizeLinkedSymbols;
726    Opts.LinkBitcodeFiles.push_back(std::make_pair(LinkFlags, A->getValue()));
727  }
728  Opts.SanitizeCoverageType =
729      getLastArgIntValue(Args, OPT_fsanitize_coverage_type, 0, Diags);
730  Opts.SanitizeCoverageIndirectCalls =
731      Args.hasArg(OPT_fsanitize_coverage_indirect_calls);
732  Opts.SanitizeCoverageTraceBB = Args.hasArg(OPT_fsanitize_coverage_trace_bb);
733  Opts.SanitizeCoverageTraceCmp = Args.hasArg(OPT_fsanitize_coverage_trace_cmp);
734  Opts.SanitizeCoverageTraceDiv = Args.hasArg(OPT_fsanitize_coverage_trace_div);
735  Opts.SanitizeCoverageTraceGep = Args.hasArg(OPT_fsanitize_coverage_trace_gep);
736  Opts.SanitizeCoverage8bitCounters =
737      Args.hasArg(OPT_fsanitize_coverage_8bit_counters);
738  Opts.SanitizeCoverageTracePC = Args.hasArg(OPT_fsanitize_coverage_trace_pc);
739  Opts.SanitizeCoverageTracePCGuard =
740      Args.hasArg(OPT_fsanitize_coverage_trace_pc_guard);
741  Opts.SanitizeMemoryTrackOrigins =
742      getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
743  Opts.SanitizeMemoryUseAfterDtor =
744      Args.hasArg(OPT_fsanitize_memory_use_after_dtor);
745  Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso);
746  Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats);
747  if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope,
748                               OPT_fno_sanitize_address_use_after_scope)) {
749    Opts.SanitizeAddressUseAfterScope =
750        A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
751  }
752  Opts.SSPBufferSize =
753      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
754  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
755  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
756    StringRef Val = A->getValue();
757    unsigned StackAlignment = Opts.StackAlignment;
758    Val.getAsInteger(10, StackAlignment);
759    Opts.StackAlignment = StackAlignment;
760  }
761
762  if (Arg *A = Args.getLastArg(OPT_mstack_probe_size)) {
763    StringRef Val = A->getValue();
764    unsigned StackProbeSize = Opts.StackProbeSize;
765    Val.getAsInteger(0, StackProbeSize);
766    Opts.StackProbeSize = StackProbeSize;
767  }
768
769  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
770    StringRef Name = A->getValue();
771    unsigned Method = llvm::StringSwitch<unsigned>(Name)
772      .Case("legacy", CodeGenOptions::Legacy)
773      .Case("non-legacy", CodeGenOptions::NonLegacy)
774      .Case("mixed", CodeGenOptions::Mixed)
775      .Default(~0U);
776    if (Method == ~0U) {
777      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
778      Success = false;
779    } else {
780      Opts.setObjCDispatchMethod(
781        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
782    }
783  }
784
785  Opts.EmulatedTLS =
786      Args.hasFlag(OPT_femulated_tls, OPT_fno_emulated_tls, false);
787
788  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
789    StringRef Name = A->getValue();
790    unsigned Model = llvm::StringSwitch<unsigned>(Name)
791        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
792        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
793        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
794        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
795        .Default(~0U);
796    if (Model == ~0U) {
797      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
798      Success = false;
799    } else {
800      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
801    }
802  }
803
804  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
805    StringRef Val = A->getValue();
806    if (Val == "fast")
807      Opts.setFPContractMode(CodeGenOptions::FPC_Fast);
808    else if (Val == "on")
809      Opts.setFPContractMode(CodeGenOptions::FPC_On);
810    else if (Val == "off")
811      Opts.setFPContractMode(CodeGenOptions::FPC_Off);
812    else
813      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
814  }
815
816  if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
817    StringRef Val = A->getValue();
818    if (Val == "ieee")
819      Opts.FPDenormalMode = "ieee";
820    else if (Val == "preserve-sign")
821      Opts.FPDenormalMode = "preserve-sign";
822    else if (Val == "positive-zero")
823      Opts.FPDenormalMode = "positive-zero";
824    else
825      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
826  }
827
828  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
829    if (A->getOption().matches(OPT_fpcc_struct_return)) {
830      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
831    } else {
832      assert(A->getOption().matches(OPT_freg_struct_return));
833      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
834    }
835  }
836
837  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
838  Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
839  bool NeedLocTracking = false;
840
841  Opts.OptRecordFile = Args.getLastArgValue(OPT_opt_record_file);
842  if (!Opts.OptRecordFile.empty())
843    NeedLocTracking = true;
844
845  if (Arg *A = Args.getLastArg(OPT_Rpass_EQ)) {
846    Opts.OptimizationRemarkPattern =
847        GenerateOptimizationRemarkRegex(Diags, Args, A);
848    NeedLocTracking = true;
849  }
850
851  if (Arg *A = Args.getLastArg(OPT_Rpass_missed_EQ)) {
852    Opts.OptimizationRemarkMissedPattern =
853        GenerateOptimizationRemarkRegex(Diags, Args, A);
854    NeedLocTracking = true;
855  }
856
857  if (Arg *A = Args.getLastArg(OPT_Rpass_analysis_EQ)) {
858    Opts.OptimizationRemarkAnalysisPattern =
859        GenerateOptimizationRemarkRegex(Diags, Args, A);
860    NeedLocTracking = true;
861  }
862
863  Opts.DiagnosticsWithHotness =
864      Args.hasArg(options::OPT_fdiagnostics_show_hotness);
865  if (Opts.DiagnosticsWithHotness &&
866      Opts.getProfileUse() == CodeGenOptions::ProfileNone)
867    Diags.Report(diag::warn_drv_fdiagnostics_show_hotness_requires_pgo);
868
869  // If the user requested to use a sample profile for PGO, then the
870  // backend will need to track source location information so the profile
871  // can be incorporated into the IR.
872  if (!Opts.SampleProfileFile.empty())
873    NeedLocTracking = true;
874
875  // If the user requested a flag that requires source locations available in
876  // the backend, make sure that the backend tracks source location information.
877  if (NeedLocTracking && Opts.getDebugInfo() == codegenoptions::NoDebugInfo)
878    Opts.setDebugInfo(codegenoptions::LocTrackingOnly);
879
880  Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
881
882  // Parse -fsanitize-recover= arguments.
883  // FIXME: Report unrecoverable sanitizers incorrectly specified here.
884  parseSanitizerKinds("-fsanitize-recover=",
885                      Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
886                      Opts.SanitizeRecover);
887  parseSanitizerKinds("-fsanitize-trap=",
888                      Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
889                      Opts.SanitizeTrap);
890
891  Opts.CudaGpuBinaryFileNames =
892      Args.getAllArgValues(OPT_fcuda_include_gpubinary);
893
894  Opts.Backchain = Args.hasArg(OPT_mbackchain);
895
896  Opts.EmitCheckPathComponentsToStrip = getLastArgIntValue(
897      Args, OPT_fsanitize_undefined_strip_path_components_EQ, 0, Diags);
898
899  return Success;
900}
901
902static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
903                                      ArgList &Args) {
904  using namespace options;
905  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
906  Opts.Targets = Args.getAllArgValues(OPT_MT);
907  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
908  Opts.IncludeModuleFiles = Args.hasArg(OPT_module_file_deps);
909  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
910  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
911  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
912  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
913  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
914  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
915  Opts.ModuleDependencyOutputDir =
916      Args.getLastArgValue(OPT_module_dependency_dir);
917  if (Args.hasArg(OPT_MV))
918    Opts.OutputFormat = DependencyOutputFormat::NMake;
919  // Add sanitizer blacklists as extra dependencies.
920  // They won't be discovered by the regular preprocessor, so
921  // we let make / ninja to know about this implicit dependency.
922  Opts.ExtraDeps = Args.getAllArgValues(OPT_fdepfile_entry);
923  auto ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
924  Opts.ExtraDeps.insert(Opts.ExtraDeps.end(), ModuleFiles.begin(),
925                        ModuleFiles.end());
926}
927
928static bool parseShowColorsArgs(const ArgList &Args, bool DefaultColor) {
929  // Color diagnostics default to auto ("on" if terminal supports) in the driver
930  // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
931  // Support both clang's -f[no-]color-diagnostics and gcc's
932  // -f[no-]diagnostics-colors[=never|always|auto].
933  enum {
934    Colors_On,
935    Colors_Off,
936    Colors_Auto
937  } ShowColors = DefaultColor ? Colors_Auto : Colors_Off;
938  for (Arg *A : Args) {
939    const Option &O = A->getOption();
940    if (O.matches(options::OPT_fcolor_diagnostics) ||
941        O.matches(options::OPT_fdiagnostics_color)) {
942      ShowColors = Colors_On;
943    } else if (O.matches(options::OPT_fno_color_diagnostics) ||
944               O.matches(options::OPT_fno_diagnostics_color)) {
945      ShowColors = Colors_Off;
946    } else if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
947      StringRef Value(A->getValue());
948      if (Value == "always")
949        ShowColors = Colors_On;
950      else if (Value == "never")
951        ShowColors = Colors_Off;
952      else if (Value == "auto")
953        ShowColors = Colors_Auto;
954    }
955  }
956  return ShowColors == Colors_On ||
957         (ShowColors == Colors_Auto &&
958          llvm::sys::Process::StandardErrHasColors());
959}
960
961bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
962                                DiagnosticsEngine *Diags,
963                                bool DefaultDiagColor, bool DefaultShowOpt) {
964  using namespace options;
965  bool Success = true;
966
967  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
968  if (Arg *A =
969          Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
970    Opts.DiagnosticSerializationFile = A->getValue();
971  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
972  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
973  Opts.Pedantic = Args.hasArg(OPT_pedantic);
974  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
975  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
976  Opts.ShowColors = parseShowColorsArgs(Args, DefaultDiagColor);
977  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
978                                 OPT_fno_show_column,
979                                 /*Default=*/true);
980  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
981  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
982  Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
983  Opts.ShowOptionNames =
984      Args.hasFlag(OPT_fdiagnostics_show_option,
985                   OPT_fno_diagnostics_show_option, DefaultShowOpt);
986
987  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
988
989  // Default behavior is to not to show note include stacks.
990  Opts.ShowNoteIncludeStack = false;
991  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
992                               OPT_fno_diagnostics_show_note_include_stack))
993    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
994      Opts.ShowNoteIncludeStack = true;
995
996  StringRef ShowOverloads =
997    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
998  if (ShowOverloads == "best")
999    Opts.setShowOverloads(Ovl_Best);
1000  else if (ShowOverloads == "all")
1001    Opts.setShowOverloads(Ovl_All);
1002  else {
1003    Success = false;
1004    if (Diags)
1005      Diags->Report(diag::err_drv_invalid_value)
1006      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1007      << ShowOverloads;
1008  }
1009
1010  StringRef ShowCategory =
1011    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1012  if (ShowCategory == "none")
1013    Opts.ShowCategories = 0;
1014  else if (ShowCategory == "id")
1015    Opts.ShowCategories = 1;
1016  else if (ShowCategory == "name")
1017    Opts.ShowCategories = 2;
1018  else {
1019    Success = false;
1020    if (Diags)
1021      Diags->Report(diag::err_drv_invalid_value)
1022      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1023      << ShowCategory;
1024  }
1025
1026  StringRef Format =
1027    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1028  if (Format == "clang")
1029    Opts.setFormat(DiagnosticOptions::Clang);
1030  else if (Format == "msvc")
1031    Opts.setFormat(DiagnosticOptions::MSVC);
1032  else if (Format == "msvc-fallback") {
1033    Opts.setFormat(DiagnosticOptions::MSVC);
1034    Opts.CLFallbackMode = true;
1035  } else if (Format == "vi")
1036    Opts.setFormat(DiagnosticOptions::Vi);
1037  else {
1038    Success = false;
1039    if (Diags)
1040      Diags->Report(diag::err_drv_invalid_value)
1041      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1042      << Format;
1043  }
1044
1045  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1046  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1047  Opts.ShowPresumedLoc = !Args.hasArg(OPT_fno_diagnostics_use_presumed_location);
1048  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1049  DiagnosticLevelMask DiagMask = DiagnosticLevelMask::None;
1050  Success &= parseDiagnosticLevelMask("-verify-ignore-unexpected=",
1051    Args.getAllArgValues(OPT_verify_ignore_unexpected_EQ),
1052    Diags, DiagMask);
1053  if (Args.hasArg(OPT_verify_ignore_unexpected))
1054    DiagMask = DiagnosticLevelMask::All;
1055  Opts.setVerifyIgnoreUnexpected(DiagMask);
1056  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1057  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1058  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
1059  Opts.MacroBacktraceLimit =
1060      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
1061                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1062  Opts.TemplateBacktraceLimit = getLastArgIntValue(
1063      Args, OPT_ftemplate_backtrace_limit,
1064      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
1065  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
1066      Args, OPT_fconstexpr_backtrace_limit,
1067      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
1068  Opts.SpellCheckingLimit = getLastArgIntValue(
1069      Args, OPT_fspell_checking_limit,
1070      DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
1071  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
1072                                    DiagnosticOptions::DefaultTabStop, Diags);
1073  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1074    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1075    if (Diags)
1076      Diags->Report(diag::warn_ignoring_ftabstop_value)
1077      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1078  }
1079  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
1080  addDiagnosticArgs(Args, OPT_W_Group, OPT_W_value_Group, Opts.Warnings);
1081  addDiagnosticArgs(Args, OPT_R_Group, OPT_R_value_Group, Opts.Remarks);
1082
1083  return Success;
1084}
1085
1086static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1087  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1088}
1089
1090/// Parse the argument to the -ftest-module-file-extension
1091/// command-line argument.
1092///
1093/// \returns true on error, false on success.
1094static bool parseTestModuleFileExtensionArg(StringRef Arg,
1095                                            std::string &BlockName,
1096                                            unsigned &MajorVersion,
1097                                            unsigned &MinorVersion,
1098                                            bool &Hashed,
1099                                            std::string &UserInfo) {
1100  SmallVector<StringRef, 5> Args;
1101  Arg.split(Args, ':', 5);
1102  if (Args.size() < 5)
1103    return true;
1104
1105  BlockName = Args[0];
1106  if (Args[1].getAsInteger(10, MajorVersion)) return true;
1107  if (Args[2].getAsInteger(10, MinorVersion)) return true;
1108  if (Args[3].getAsInteger(2, Hashed)) return true;
1109  if (Args.size() > 4)
1110    UserInfo = Args[4];
1111  return false;
1112}
1113
1114static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1115                                   DiagnosticsEngine &Diags,
1116                                   bool &IsHeaderFile) {
1117  using namespace options;
1118  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1119  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1120    switch (A->getOption().getID()) {
1121    default:
1122      llvm_unreachable("Invalid option in group!");
1123    case OPT_ast_list:
1124      Opts.ProgramAction = frontend::ASTDeclList; break;
1125    case OPT_ast_dump:
1126    case OPT_ast_dump_lookups:
1127      Opts.ProgramAction = frontend::ASTDump; break;
1128    case OPT_ast_print:
1129      Opts.ProgramAction = frontend::ASTPrint; break;
1130    case OPT_ast_view:
1131      Opts.ProgramAction = frontend::ASTView; break;
1132    case OPT_dump_raw_tokens:
1133      Opts.ProgramAction = frontend::DumpRawTokens; break;
1134    case OPT_dump_tokens:
1135      Opts.ProgramAction = frontend::DumpTokens; break;
1136    case OPT_S:
1137      Opts.ProgramAction = frontend::EmitAssembly; break;
1138    case OPT_emit_llvm_bc:
1139      Opts.ProgramAction = frontend::EmitBC; break;
1140    case OPT_emit_html:
1141      Opts.ProgramAction = frontend::EmitHTML; break;
1142    case OPT_emit_llvm:
1143      Opts.ProgramAction = frontend::EmitLLVM; break;
1144    case OPT_emit_llvm_only:
1145      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1146    case OPT_emit_codegen_only:
1147      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1148    case OPT_emit_obj:
1149      Opts.ProgramAction = frontend::EmitObj; break;
1150    case OPT_fixit_EQ:
1151      Opts.FixItSuffix = A->getValue();
1152      // fall-through!
1153    case OPT_fixit:
1154      Opts.ProgramAction = frontend::FixIt; break;
1155    case OPT_emit_module:
1156      Opts.ProgramAction = frontend::GenerateModule; break;
1157    case OPT_emit_module_interface:
1158      Opts.ProgramAction = frontend::GenerateModuleInterface; break;
1159    case OPT_emit_pch:
1160      Opts.ProgramAction = frontend::GeneratePCH; break;
1161    case OPT_emit_pth:
1162      Opts.ProgramAction = frontend::GeneratePTH; break;
1163    case OPT_init_only:
1164      Opts.ProgramAction = frontend::InitOnly; break;
1165    case OPT_fsyntax_only:
1166      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1167    case OPT_module_file_info:
1168      Opts.ProgramAction = frontend::ModuleFileInfo; break;
1169    case OPT_verify_pch:
1170      Opts.ProgramAction = frontend::VerifyPCH; break;
1171    case OPT_print_decl_contexts:
1172      Opts.ProgramAction = frontend::PrintDeclContext; break;
1173    case OPT_print_preamble:
1174      Opts.ProgramAction = frontend::PrintPreamble; break;
1175    case OPT_E:
1176      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1177    case OPT_rewrite_macros:
1178      Opts.ProgramAction = frontend::RewriteMacros; break;
1179    case OPT_rewrite_objc:
1180      Opts.ProgramAction = frontend::RewriteObjC; break;
1181    case OPT_rewrite_test:
1182      Opts.ProgramAction = frontend::RewriteTest; break;
1183    case OPT_analyze:
1184      Opts.ProgramAction = frontend::RunAnalysis; break;
1185    case OPT_migrate:
1186      Opts.ProgramAction = frontend::MigrateSource; break;
1187    case OPT_Eonly:
1188      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1189    }
1190  }
1191
1192  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1193    Opts.Plugins.emplace_back(A->getValue(0));
1194    Opts.ProgramAction = frontend::PluginAction;
1195    Opts.ActionName = A->getValue();
1196  }
1197  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1198  for (const Arg *AA : Args.filtered(OPT_plugin_arg))
1199    Opts.PluginArgs[AA->getValue(0)].emplace_back(AA->getValue(1));
1200
1201  for (const std::string &Arg :
1202         Args.getAllArgValues(OPT_ftest_module_file_extension_EQ)) {
1203    std::string BlockName;
1204    unsigned MajorVersion;
1205    unsigned MinorVersion;
1206    bool Hashed;
1207    std::string UserInfo;
1208    if (parseTestModuleFileExtensionArg(Arg, BlockName, MajorVersion,
1209                                        MinorVersion, Hashed, UserInfo)) {
1210      Diags.Report(diag::err_test_module_file_extension_format) << Arg;
1211
1212      continue;
1213    }
1214
1215    // Add the testing module file extension.
1216    Opts.ModuleFileExtensions.push_back(
1217        std::make_shared<TestModuleFileExtension>(
1218            BlockName, MajorVersion, MinorVersion, Hashed, UserInfo));
1219  }
1220
1221  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1222    Opts.CodeCompletionAt =
1223      ParsedSourceLocation::FromString(A->getValue());
1224    if (Opts.CodeCompletionAt.FileName.empty())
1225      Diags.Report(diag::err_drv_invalid_value)
1226        << A->getAsString(Args) << A->getValue();
1227  }
1228  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1229
1230  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1231  Opts.Plugins = Args.getAllArgValues(OPT_load);
1232  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1233  Opts.ShowHelp = Args.hasArg(OPT_help);
1234  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1235  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1236  Opts.ShowVersion = Args.hasArg(OPT_version);
1237  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1238  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1239  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1240  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1241  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1242  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1243  Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
1244  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1245  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
1246  Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
1247  Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
1248  Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
1249  Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
1250  Opts.ModulesEmbedFiles = Args.getAllArgValues(OPT_fmodules_embed_file_EQ);
1251  Opts.ModulesEmbedAllFiles = Args.hasArg(OPT_fmodules_embed_all_files);
1252  Opts.IncludeTimestamps = !Args.hasArg(OPT_fno_pch_timestamp);
1253
1254  Opts.CodeCompleteOpts.IncludeMacros
1255    = Args.hasArg(OPT_code_completion_macros);
1256  Opts.CodeCompleteOpts.IncludeCodePatterns
1257    = Args.hasArg(OPT_code_completion_patterns);
1258  Opts.CodeCompleteOpts.IncludeGlobals
1259    = !Args.hasArg(OPT_no_code_completion_globals);
1260  Opts.CodeCompleteOpts.IncludeBriefComments
1261    = Args.hasArg(OPT_code_completion_brief_comments);
1262
1263  Opts.OverrideRecordLayoutsFile
1264    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1265  Opts.AuxTriple =
1266      llvm::Triple::normalize(Args.getLastArgValue(OPT_aux_triple));
1267  Opts.FindPchSource = Args.getLastArgValue(OPT_find_pch_source_EQ);
1268  Opts.StatsFile = Args.getLastArgValue(OPT_stats_file);
1269
1270  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1271                                     OPT_arcmt_modify,
1272                                     OPT_arcmt_migrate)) {
1273    switch (A->getOption().getID()) {
1274    default:
1275      llvm_unreachable("missed a case");
1276    case OPT_arcmt_check:
1277      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1278      break;
1279    case OPT_arcmt_modify:
1280      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1281      break;
1282    case OPT_arcmt_migrate:
1283      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1284      break;
1285    }
1286  }
1287  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1288  Opts.ARCMTMigrateReportOut
1289    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1290  Opts.ARCMTMigrateEmitARCErrors
1291    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1292
1293  if (Args.hasArg(OPT_objcmt_migrate_literals))
1294    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1295  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1296    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1297  if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
1298    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
1299  if (Args.hasArg(OPT_objcmt_migrate_property))
1300    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
1301  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
1302    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
1303  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
1304    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
1305  if (Args.hasArg(OPT_objcmt_migrate_annotation))
1306    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
1307  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
1308    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
1309  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
1310    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
1311  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
1312    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
1313  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
1314    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
1315  if (Args.hasArg(OPT_objcmt_atomic_property))
1316    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
1317  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
1318    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
1319  if (Args.hasArg(OPT_objcmt_migrate_designated_init))
1320    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_DesignatedInitializer;
1321  if (Args.hasArg(OPT_objcmt_migrate_all))
1322    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
1323
1324  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_whitelist_dir_path);
1325
1326  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1327      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1328    Diags.Report(diag::err_drv_argument_not_allowed_with)
1329      << "ARC migration" << "ObjC migration";
1330  }
1331
1332  InputKind DashX = IK_None;
1333  if (const Arg *A = Args.getLastArg(OPT_x)) {
1334    DashX = llvm::StringSwitch<InputKind>(A->getValue())
1335      .Case("c", IK_C)
1336      .Case("cl", IK_OpenCL)
1337      .Case("cuda", IK_CUDA)
1338      .Case("c++", IK_CXX)
1339      .Case("c++-module", IK_CXX)
1340      .Case("objective-c", IK_ObjC)
1341      .Case("objective-c++", IK_ObjCXX)
1342      .Case("cpp-output", IK_PreprocessedC)
1343      .Case("assembler-with-cpp", IK_Asm)
1344      .Case("c++-cpp-output", IK_PreprocessedCXX)
1345      .Case("c++-module-cpp-output", IK_PreprocessedCXX)
1346      .Case("cuda-cpp-output", IK_PreprocessedCuda)
1347      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1348      .Case("objc-cpp-output", IK_PreprocessedObjC)
1349      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1350      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1351      .Case("c-header", IK_C)
1352      .Case("cl-header", IK_OpenCL)
1353      .Case("objective-c-header", IK_ObjC)
1354      .Case("c++-header", IK_CXX)
1355      .Case("objective-c++-header", IK_ObjCXX)
1356      .Cases("ast", "pcm", IK_AST)
1357      .Case("ir", IK_LLVM_IR)
1358      .Case("renderscript", IK_RenderScript)
1359      .Default(IK_None);
1360    if (DashX == IK_None)
1361      Diags.Report(diag::err_drv_invalid_value)
1362        << A->getAsString(Args) << A->getValue();
1363    IsHeaderFile = llvm::StringSwitch<bool>(A->getValue())
1364      .Case("c-header", true)
1365      .Case("cl-header", true)
1366      .Case("objective-c-header", true)
1367      .Case("c++-header", true)
1368      .Case("objective-c++-header", true)
1369      .Default(false);
1370  }
1371
1372  // '-' is the default input if none is given.
1373  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1374  Opts.Inputs.clear();
1375  if (Inputs.empty())
1376    Inputs.push_back("-");
1377  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1378    InputKind IK = DashX;
1379    if (IK == IK_None) {
1380      IK = FrontendOptions::getInputKindForExtension(
1381        StringRef(Inputs[i]).rsplit('.').second);
1382      // FIXME: Remove this hack.
1383      if (i == 0)
1384        DashX = IK;
1385    }
1386    Opts.Inputs.emplace_back(std::move(Inputs[i]), IK);
1387  }
1388
1389  return DashX;
1390}
1391
1392std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1393                                                 void *MainAddr) {
1394  std::string ClangExecutable =
1395      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
1396  StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
1397
1398  // Compute the path to the resource directory.
1399  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
1400  SmallString<128> P(Dir);
1401  if (ClangResourceDir != "")
1402    llvm::sys::path::append(P, ClangResourceDir);
1403  else
1404    llvm::sys::path::append(P, "..", Twine("lib") + CLANG_LIBDIR_SUFFIX,
1405                            "clang", CLANG_VERSION_STRING);
1406
1407  return P.str();
1408}
1409
1410static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1411  using namespace options;
1412  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1413  Opts.Verbose = Args.hasArg(OPT_v);
1414  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1415  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1416  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1417  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1418    Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
1419  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1420  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
1421  Opts.ModuleUserBuildPath = Args.getLastArgValue(OPT_fmodules_user_build_path);
1422  for (const Arg *A : Args.filtered(OPT_fprebuilt_module_path))
1423    Opts.AddPrebuiltModulePath(A->getValue());
1424  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1425  Opts.ModulesValidateDiagnosticOptions =
1426      !Args.hasArg(OPT_fmodules_disable_diagnostic_validation);
1427  Opts.ImplicitModuleMaps = Args.hasArg(OPT_fimplicit_module_maps);
1428  Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
1429  Opts.ModuleCachePruneInterval =
1430      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
1431  Opts.ModuleCachePruneAfter =
1432      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
1433  Opts.ModulesValidateOncePerBuildSession =
1434      Args.hasArg(OPT_fmodules_validate_once_per_build_session);
1435  Opts.BuildSessionTimestamp =
1436      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
1437  Opts.ModulesValidateSystemHeaders =
1438      Args.hasArg(OPT_fmodules_validate_system_headers);
1439  if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
1440    Opts.ModuleFormat = A->getValue();
1441
1442  for (const Arg *A : Args.filtered(OPT_fmodules_ignore_macro)) {
1443    StringRef MacroDef = A->getValue();
1444    Opts.ModulesIgnoreMacros.insert(
1445        llvm::CachedHashString(MacroDef.split('=').first));
1446  }
1447
1448  // Add -I..., -F..., and -index-header-map options in order.
1449  bool IsIndexHeaderMap = false;
1450  bool IsSysrootSpecified =
1451      Args.hasArg(OPT__sysroot_EQ) || Args.hasArg(OPT_isysroot);
1452  for (const Arg *A : Args.filtered(OPT_I, OPT_F, OPT_index_header_map)) {
1453    if (A->getOption().matches(OPT_index_header_map)) {
1454      // -index-header-map applies to the next -I or -F.
1455      IsIndexHeaderMap = true;
1456      continue;
1457    }
1458
1459    frontend::IncludeDirGroup Group =
1460        IsIndexHeaderMap ? frontend::IndexHeaderMap : frontend::Angled;
1461
1462    bool IsFramework = A->getOption().matches(OPT_F);
1463    std::string Path = A->getValue();
1464
1465    if (IsSysrootSpecified && !IsFramework && A->getValue()[0] == '=') {
1466      SmallString<32> Buffer;
1467      llvm::sys::path::append(Buffer, Opts.Sysroot,
1468                              llvm::StringRef(A->getValue()).substr(1));
1469      Path = Buffer.str();
1470    }
1471
1472    Opts.AddPath(Path, Group, IsFramework,
1473                 /*IgnoreSysroot*/ true);
1474    IsIndexHeaderMap = false;
1475  }
1476
1477  // Add -iprefix/-iwithprefix/-iwithprefixbefore options.
1478  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1479  for (const Arg *A :
1480       Args.filtered(OPT_iprefix, OPT_iwithprefix, OPT_iwithprefixbefore)) {
1481    if (A->getOption().matches(OPT_iprefix))
1482      Prefix = A->getValue();
1483    else if (A->getOption().matches(OPT_iwithprefix))
1484      Opts.AddPath(Prefix.str() + A->getValue(), frontend::After, false, true);
1485    else
1486      Opts.AddPath(Prefix.str() + A->getValue(), frontend::Angled, false, true);
1487  }
1488
1489  for (const Arg *A : Args.filtered(OPT_idirafter))
1490    Opts.AddPath(A->getValue(), frontend::After, false, true);
1491  for (const Arg *A : Args.filtered(OPT_iquote))
1492    Opts.AddPath(A->getValue(), frontend::Quoted, false, true);
1493  for (const Arg *A : Args.filtered(OPT_isystem, OPT_iwithsysroot))
1494    Opts.AddPath(A->getValue(), frontend::System, false,
1495                 !A->getOption().matches(OPT_iwithsysroot));
1496  for (const Arg *A : Args.filtered(OPT_iframework))
1497    Opts.AddPath(A->getValue(), frontend::System, true, true);
1498
1499  // Add the paths for the various language specific isystem flags.
1500  for (const Arg *A : Args.filtered(OPT_c_isystem))
1501    Opts.AddPath(A->getValue(), frontend::CSystem, false, true);
1502  for (const Arg *A : Args.filtered(OPT_cxx_isystem))
1503    Opts.AddPath(A->getValue(), frontend::CXXSystem, false, true);
1504  for (const Arg *A : Args.filtered(OPT_objc_isystem))
1505    Opts.AddPath(A->getValue(), frontend::ObjCSystem, false,true);
1506  for (const Arg *A : Args.filtered(OPT_objcxx_isystem))
1507    Opts.AddPath(A->getValue(), frontend::ObjCXXSystem, false, true);
1508
1509  // Add the internal paths from a driver that detects standard include paths.
1510  for (const Arg *A :
1511       Args.filtered(OPT_internal_isystem, OPT_internal_externc_isystem)) {
1512    frontend::IncludeDirGroup Group = frontend::System;
1513    if (A->getOption().matches(OPT_internal_externc_isystem))
1514      Group = frontend::ExternCSystem;
1515    Opts.AddPath(A->getValue(), Group, false, true);
1516  }
1517
1518  // Add the path prefixes which are implicitly treated as being system headers.
1519  for (const Arg *A :
1520       Args.filtered(OPT_system_header_prefix, OPT_no_system_header_prefix))
1521    Opts.AddSystemHeaderPrefix(
1522        A->getValue(), A->getOption().matches(OPT_system_header_prefix));
1523
1524  for (const Arg *A : Args.filtered(OPT_ivfsoverlay))
1525    Opts.AddVFSOverlayFile(A->getValue());
1526}
1527
1528static bool isOpenCL(LangStandard::Kind LangStd) {
1529  return LangStd == LangStandard::lang_opencl ||
1530         LangStd == LangStandard::lang_opencl11 ||
1531         LangStd == LangStandard::lang_opencl12 ||
1532         LangStd == LangStandard::lang_opencl20;
1533}
1534
1535void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1536                                         const llvm::Triple &T,
1537                                         PreprocessorOptions &PPOpts,
1538                                         LangStandard::Kind LangStd) {
1539  // Set some properties which depend solely on the input kind; it would be nice
1540  // to move these to the language standard, and have the driver resolve the
1541  // input kind + language standard.
1542  if (IK == IK_Asm) {
1543    Opts.AsmPreprocessor = 1;
1544  } else if (IK == IK_ObjC ||
1545             IK == IK_ObjCXX ||
1546             IK == IK_PreprocessedObjC ||
1547             IK == IK_PreprocessedObjCXX) {
1548    Opts.ObjC1 = Opts.ObjC2 = 1;
1549  }
1550
1551  if (LangStd == LangStandard::lang_unspecified) {
1552    // Based on the base language, pick one.
1553    switch (IK) {
1554    case IK_None:
1555    case IK_AST:
1556    case IK_LLVM_IR:
1557      llvm_unreachable("Invalid input kind!");
1558    case IK_OpenCL:
1559      LangStd = LangStandard::lang_opencl;
1560      break;
1561    case IK_CUDA:
1562    case IK_PreprocessedCuda:
1563      LangStd = LangStandard::lang_cuda;
1564      break;
1565    case IK_Asm:
1566    case IK_C:
1567    case IK_PreprocessedC:
1568      // The PS4 uses C99 as the default C standard.
1569      if (T.isPS4())
1570        LangStd = LangStandard::lang_gnu99;
1571      else
1572        LangStd = LangStandard::lang_gnu11;
1573      break;
1574    case IK_ObjC:
1575    case IK_PreprocessedObjC:
1576      LangStd = LangStandard::lang_gnu11;
1577      break;
1578    case IK_CXX:
1579    case IK_PreprocessedCXX:
1580    case IK_ObjCXX:
1581    case IK_PreprocessedObjCXX:
1582      LangStd = LangStandard::lang_gnucxx98;
1583      break;
1584    case IK_RenderScript:
1585      LangStd = LangStandard::lang_c99;
1586      break;
1587    }
1588  }
1589
1590  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1591  Opts.LineComment = Std.hasLineComments();
1592  Opts.C99 = Std.isC99();
1593  Opts.C11 = Std.isC11();
1594  Opts.CPlusPlus = Std.isCPlusPlus();
1595  Opts.CPlusPlus11 = Std.isCPlusPlus11();
1596  Opts.CPlusPlus14 = Std.isCPlusPlus14();
1597  Opts.CPlusPlus1z = Std.isCPlusPlus1z();
1598  Opts.Digraphs = Std.hasDigraphs();
1599  Opts.GNUMode = Std.isGNUMode();
1600  Opts.GNUInline = Std.isC89();
1601  Opts.HexFloats = Std.hasHexFloats();
1602  Opts.ImplicitInt = Std.hasImplicitInt();
1603
1604  // Set OpenCL Version.
1605  Opts.OpenCL = isOpenCL(LangStd) || IK == IK_OpenCL;
1606  if (LangStd == LangStandard::lang_opencl)
1607    Opts.OpenCLVersion = 100;
1608  else if (LangStd == LangStandard::lang_opencl11)
1609    Opts.OpenCLVersion = 110;
1610  else if (LangStd == LangStandard::lang_opencl12)
1611    Opts.OpenCLVersion = 120;
1612  else if (LangStd == LangStandard::lang_opencl20)
1613    Opts.OpenCLVersion = 200;
1614
1615  // OpenCL has some additional defaults.
1616  if (Opts.OpenCL) {
1617    Opts.AltiVec = 0;
1618    Opts.ZVector = 0;
1619    Opts.CXXOperatorNames = 1;
1620    Opts.LaxVectorConversions = 0;
1621    Opts.DefaultFPContract = 1;
1622    Opts.NativeHalfType = 1;
1623    Opts.NativeHalfArgsAndReturns = 1;
1624    // Include default header file for OpenCL.
1625    if (Opts.IncludeDefaultHeader) {
1626      PPOpts.Includes.push_back("opencl-c.h");
1627    }
1628  }
1629
1630  Opts.CUDA = IK == IK_CUDA || IK == IK_PreprocessedCuda ||
1631              LangStd == LangStandard::lang_cuda;
1632
1633  Opts.RenderScript = IK == IK_RenderScript;
1634  if (Opts.RenderScript) {
1635    Opts.NativeHalfType = 1;
1636    Opts.NativeHalfArgsAndReturns = 1;
1637  }
1638
1639  // OpenCL and C++ both have bool, true, false keywords.
1640  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1641
1642  // OpenCL has half keyword
1643  Opts.Half = Opts.OpenCL;
1644
1645  // C++ has wchar_t keyword.
1646  Opts.WChar = Opts.CPlusPlus;
1647
1648  Opts.GNUKeywords = Opts.GNUMode;
1649  Opts.CXXOperatorNames = Opts.CPlusPlus;
1650
1651  Opts.AlignedAllocation = Opts.CPlusPlus1z;
1652
1653  Opts.DollarIdents = !Opts.AsmPreprocessor;
1654}
1655
1656/// Attempt to parse a visibility value out of the given argument.
1657static Visibility parseVisibility(Arg *arg, ArgList &args,
1658                                  DiagnosticsEngine &diags) {
1659  StringRef value = arg->getValue();
1660  if (value == "default") {
1661    return DefaultVisibility;
1662  } else if (value == "hidden" || value == "internal") {
1663    return HiddenVisibility;
1664  } else if (value == "protected") {
1665    // FIXME: diagnose if target does not support protected visibility
1666    return ProtectedVisibility;
1667  }
1668
1669  diags.Report(diag::err_drv_invalid_value)
1670    << arg->getAsString(args) << value;
1671  return DefaultVisibility;
1672}
1673
1674static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1675                          const TargetOptions &TargetOpts,
1676                          PreprocessorOptions &PPOpts,
1677                          DiagnosticsEngine &Diags) {
1678  // FIXME: Cleanup per-file based stuff.
1679  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1680  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1681    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1682#define LANGSTANDARD(id, name, desc, features) \
1683      .Case(name, LangStandard::lang_##id)
1684#define LANGSTANDARD_ALIAS(id, alias) \
1685      .Case(alias, LangStandard::lang_##id)
1686#include "clang/Frontend/LangStandards.def"
1687      .Default(LangStandard::lang_unspecified);
1688    if (LangStd == LangStandard::lang_unspecified)
1689      Diags.Report(diag::err_drv_invalid_value)
1690        << A->getAsString(Args) << A->getValue();
1691    else {
1692      // Valid standard, check to make sure language and standard are
1693      // compatible.
1694      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1695      switch (IK) {
1696      case IK_C:
1697      case IK_ObjC:
1698      case IK_PreprocessedC:
1699      case IK_PreprocessedObjC:
1700        if (!(Std.isC89() || Std.isC99()))
1701          Diags.Report(diag::err_drv_argument_not_allowed_with)
1702            << A->getAsString(Args) << "C/ObjC";
1703        break;
1704      case IK_CXX:
1705      case IK_ObjCXX:
1706      case IK_PreprocessedCXX:
1707      case IK_PreprocessedObjCXX:
1708        if (!Std.isCPlusPlus())
1709          Diags.Report(diag::err_drv_argument_not_allowed_with)
1710            << A->getAsString(Args) << "C++/ObjC++";
1711        break;
1712      case IK_OpenCL:
1713        if (!isOpenCL(LangStd))
1714          Diags.Report(diag::err_drv_argument_not_allowed_with)
1715            << A->getAsString(Args) << "OpenCL";
1716        break;
1717      case IK_CUDA:
1718      case IK_PreprocessedCuda:
1719        if (!Std.isCPlusPlus())
1720          Diags.Report(diag::err_drv_argument_not_allowed_with)
1721            << A->getAsString(Args) << "CUDA";
1722        break;
1723      default:
1724        break;
1725      }
1726    }
1727  }
1728
1729  // -cl-std only applies for OpenCL language standards.
1730  // Override the -std option in this case.
1731  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1732    LangStandard::Kind OpenCLLangStd
1733    = llvm::StringSwitch<LangStandard::Kind>(A->getValue())
1734    .Cases("cl", "CL", LangStandard::lang_opencl)
1735    .Cases("cl1.1", "CL1.1", LangStandard::lang_opencl11)
1736    .Cases("cl1.2", "CL1.2", LangStandard::lang_opencl12)
1737    .Cases("cl2.0", "CL2.0", LangStandard::lang_opencl20)
1738    .Default(LangStandard::lang_unspecified);
1739
1740    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1741      Diags.Report(diag::err_drv_invalid_value)
1742      << A->getAsString(Args) << A->getValue();
1743    }
1744    else
1745      LangStd = OpenCLLangStd;
1746  }
1747
1748  Opts.IncludeDefaultHeader = Args.hasArg(OPT_finclude_default_header);
1749
1750  llvm::Triple T(TargetOpts.Triple);
1751  CompilerInvocation::setLangDefaults(Opts, IK, T, PPOpts, LangStd);
1752
1753  // -cl-strict-aliasing needs to emit diagnostic in the case where CL > 1.0.
1754  // This option should be deprecated for CL > 1.0 because
1755  // this option was added for compatibility with OpenCL 1.0.
1756  if (Args.getLastArg(OPT_cl_strict_aliasing)
1757       && Opts.OpenCLVersion > 100) {
1758    std::string VerSpec = llvm::to_string(Opts.OpenCLVersion / 100) +
1759                          std::string(".") +
1760                          llvm::to_string((Opts.OpenCLVersion % 100) / 10);
1761    Diags.Report(diag::warn_option_invalid_ocl_version)
1762      << VerSpec << Args.getLastArg(OPT_cl_strict_aliasing)->getAsString(Args);
1763  }
1764
1765  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1766  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1767  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1768  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1769  // name, as it doesn't seem a useful distinction.
1770  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1771                                  Opts.GNUKeywords);
1772
1773  if (Args.hasArg(OPT_fno_operator_names))
1774    Opts.CXXOperatorNames = 0;
1775
1776  if (Args.hasArg(OPT_fcuda_is_device))
1777    Opts.CUDAIsDevice = 1;
1778
1779  if (Args.hasArg(OPT_fcuda_allow_variadic_functions))
1780    Opts.CUDAAllowVariadicFunctions = 1;
1781
1782  if (Args.hasArg(OPT_fno_cuda_host_device_constexpr))
1783    Opts.CUDAHostDeviceConstexpr = 0;
1784
1785  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_flush_denormals_to_zero))
1786    Opts.CUDADeviceFlushDenormalsToZero = 1;
1787
1788  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
1789    Opts.CUDADeviceApproxTranscendentals = 1;
1790
1791  if (Opts.ObjC1) {
1792    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1793      StringRef value = arg->getValue();
1794      if (Opts.ObjCRuntime.tryParse(value))
1795        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1796    }
1797
1798    if (Args.hasArg(OPT_fobjc_gc_only))
1799      Opts.setGC(LangOptions::GCOnly);
1800    else if (Args.hasArg(OPT_fobjc_gc))
1801      Opts.setGC(LangOptions::HybridGC);
1802    else if (Args.hasArg(OPT_fobjc_arc)) {
1803      Opts.ObjCAutoRefCount = 1;
1804      if (!Opts.ObjCRuntime.allowsARC())
1805        Diags.Report(diag::err_arc_unsupported_on_runtime);
1806    }
1807
1808    // ObjCWeakRuntime tracks whether the runtime supports __weak, not
1809    // whether the feature is actually enabled.  This is predominantly
1810    // determined by -fobjc-runtime, but we allow it to be overridden
1811    // from the command line for testing purposes.
1812    if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1813      Opts.ObjCWeakRuntime = 1;
1814    else
1815      Opts.ObjCWeakRuntime = Opts.ObjCRuntime.allowsWeak();
1816
1817    // ObjCWeak determines whether __weak is actually enabled.
1818    // Note that we allow -fno-objc-weak to disable this even in ARC mode.
1819    if (auto weakArg = Args.getLastArg(OPT_fobjc_weak, OPT_fno_objc_weak)) {
1820      if (!weakArg->getOption().matches(OPT_fobjc_weak)) {
1821        assert(!Opts.ObjCWeak);
1822      } else if (Opts.getGC() != LangOptions::NonGC) {
1823        Diags.Report(diag::err_objc_weak_with_gc);
1824      } else if (!Opts.ObjCWeakRuntime) {
1825        Diags.Report(diag::err_objc_weak_unsupported);
1826      } else {
1827        Opts.ObjCWeak = 1;
1828      }
1829    } else if (Opts.ObjCAutoRefCount) {
1830      Opts.ObjCWeak = Opts.ObjCWeakRuntime;
1831    }
1832
1833    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1834      Opts.ObjCInferRelatedResultType = 0;
1835
1836    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
1837      Opts.ObjCSubscriptingLegacyRuntime =
1838        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
1839  }
1840
1841  if (Args.hasArg(OPT_fgnu89_inline)) {
1842    if (Opts.CPlusPlus)
1843      Diags.Report(diag::err_drv_argument_not_allowed_with) << "-fgnu89-inline"
1844                                                            << "C++/ObjC++";
1845    else
1846      Opts.GNUInline = 1;
1847  }
1848
1849  if (Args.hasArg(OPT_fapple_kext)) {
1850    if (!Opts.CPlusPlus)
1851      Diags.Report(diag::warn_c_kext);
1852    else
1853      Opts.AppleKext = 1;
1854  }
1855
1856  if (Args.hasArg(OPT_print_ivar_layout))
1857    Opts.ObjCGCBitmapPrint = 1;
1858  if (Args.hasArg(OPT_fno_constant_cfstrings))
1859    Opts.NoConstantCFStrings = 1;
1860
1861  if (Args.hasArg(OPT_faltivec))
1862    Opts.AltiVec = 1;
1863
1864  if (Args.hasArg(OPT_fzvector))
1865    Opts.ZVector = 1;
1866
1867  if (Args.hasArg(OPT_pthread))
1868    Opts.POSIXThreads = 1;
1869
1870  // The value-visibility mode defaults to "default".
1871  if (Arg *visOpt = Args.getLastArg(OPT_fvisibility)) {
1872    Opts.setValueVisibilityMode(parseVisibility(visOpt, Args, Diags));
1873  } else {
1874    Opts.setValueVisibilityMode(DefaultVisibility);
1875  }
1876
1877  // The type-visibility mode defaults to the value-visibility mode.
1878  if (Arg *typeVisOpt = Args.getLastArg(OPT_ftype_visibility)) {
1879    Opts.setTypeVisibilityMode(parseVisibility(typeVisOpt, Args, Diags));
1880  } else {
1881    Opts.setTypeVisibilityMode(Opts.getValueVisibilityMode());
1882  }
1883
1884  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1885    Opts.InlineVisibilityHidden = 1;
1886
1887  if (Args.hasArg(OPT_ftrapv)) {
1888    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1889    // Set the handler, if one is specified.
1890    Opts.OverflowHandler =
1891        Args.getLastArgValue(OPT_ftrapv_handler);
1892  }
1893  else if (Args.hasArg(OPT_fwrapv))
1894    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1895
1896  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
1897  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
1898  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
1899  Opts.MSCompatibilityVersion = 0;
1900  if (const Arg *A = Args.getLastArg(OPT_fms_compatibility_version)) {
1901    VersionTuple VT;
1902    if (VT.tryParse(A->getValue()))
1903      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
1904                                                << A->getValue();
1905    Opts.MSCompatibilityVersion = VT.getMajor() * 10000000 +
1906                                  VT.getMinor().getValueOr(0) * 100000 +
1907                                  VT.getSubminor().getValueOr(0);
1908  }
1909
1910  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1911  // is specified, or -std is set to a conforming mode.
1912  // Trigraphs are disabled by default in c++1z onwards.
1913  Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
1914  Opts.Trigraphs =
1915      Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
1916
1917  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1918                                   OPT_fno_dollars_in_identifiers,
1919                                   Opts.DollarIdents);
1920  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1921  Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
1922  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1923  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1924  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1925                                   Opts.ConstStrings);
1926  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1927    Opts.LaxVectorConversions = 0;
1928  if (Args.hasArg(OPT_fno_threadsafe_statics))
1929    Opts.ThreadsafeStatics = 0;
1930  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1931  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1932  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1933  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1934  Opts.ExternCNoUnwind = Args.hasArg(OPT_fexternc_nounwind);
1935  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1936
1937  Opts.RTTI = Opts.CPlusPlus && !Args.hasArg(OPT_fno_rtti);
1938  Opts.RTTIData = Opts.RTTI && !Args.hasArg(OPT_fno_rtti_data);
1939  Opts.Blocks = Args.hasArg(OPT_fblocks) || (Opts.OpenCL
1940    && Opts.OpenCLVersion >= 200);
1941  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1942  Opts.CoroutinesTS = Args.hasArg(OPT_fcoroutines_ts);
1943  Opts.ModulesTS = Args.hasArg(OPT_fmodules_ts);
1944  Opts.Modules = Args.hasArg(OPT_fmodules) || Opts.ModulesTS;
1945  Opts.ModulesStrictDeclUse = Args.hasArg(OPT_fmodules_strict_decluse);
1946  Opts.ModulesDeclUse =
1947      Args.hasArg(OPT_fmodules_decluse) || Opts.ModulesStrictDeclUse;
1948  Opts.ModulesLocalVisibility =
1949      Args.hasArg(OPT_fmodules_local_submodule_visibility) || Opts.ModulesTS;
1950  Opts.ModulesSearchAll = Opts.Modules &&
1951    !Args.hasArg(OPT_fno_modules_search_all) &&
1952    Args.hasArg(OPT_fmodules_search_all);
1953  Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
1954  Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules);
1955  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
1956  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
1957  Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
1958  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1959  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1960  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1961  if (!Opts.NoBuiltin)
1962    getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
1963  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
1964  Opts.RelaxedTemplateTemplateArgs =
1965      Args.hasArg(OPT_frelaxed_template_template_args);
1966  Opts.SizedDeallocation = Args.hasArg(OPT_fsized_deallocation);
1967  Opts.AlignedAllocation =
1968      Args.hasFlag(OPT_faligned_allocation, OPT_fno_aligned_allocation,
1969                   Opts.AlignedAllocation);
1970  Opts.NewAlignOverride =
1971      getLastArgIntValue(Args, OPT_fnew_alignment_EQ, 0, Diags);
1972  if (Opts.NewAlignOverride && !llvm::isPowerOf2_32(Opts.NewAlignOverride)) {
1973    Arg *A = Args.getLastArg(OPT_fnew_alignment_EQ);
1974    Diags.Report(diag::err_fe_invalid_alignment) << A->getAsString(Args)
1975                                                 << A->getValue();
1976    Opts.NewAlignOverride = 0;
1977  }
1978  Opts.ConceptsTS = Args.hasArg(OPT_fconcepts_ts);
1979  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1980  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1981  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1982  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
1983  Opts.InstantiationDepth =
1984      getLastArgIntValue(Args, OPT_ftemplate_depth, 1024, Diags);
1985  Opts.ArrowDepth =
1986      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
1987  Opts.ConstexprCallDepth =
1988      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
1989  Opts.ConstexprStepLimit =
1990      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
1991  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
1992  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1993  Opts.NumLargeByValueCopy =
1994      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
1995  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1996  Opts.ObjCConstantStringClass =
1997    Args.getLastArgValue(OPT_fconstant_string_class);
1998  Opts.ObjCDefaultSynthProperties =
1999    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
2000  Opts.EncodeExtendedBlockSig =
2001    Args.hasArg(OPT_fencode_extended_block_signature);
2002  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2003  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
2004  Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
2005  Opts.AlignDouble = Args.hasArg(OPT_malign_double);
2006  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2007  Opts.PIE = Args.hasArg(OPT_pic_is_pie);
2008  Opts.Static = Args.hasArg(OPT_static_define);
2009  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2010  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2011                        || Args.hasArg(OPT_fdump_record_layouts);
2012  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2013  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2014  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2015  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2016  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2017  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2018  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2019  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2020  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2021  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2022  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2023  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2024  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name_EQ);
2025  Opts.AppExt = Args.hasArg(OPT_fapplication_extension);
2026  Opts.ModuleFeatures = Args.getAllArgValues(OPT_fmodule_feature);
2027  std::sort(Opts.ModuleFeatures.begin(), Opts.ModuleFeatures.end());
2028  Opts.NativeHalfType |= Args.hasArg(OPT_fnative_half_type);
2029  Opts.NativeHalfArgsAndReturns |= Args.hasArg(OPT_fnative_half_arguments_and_returns);
2030  // Enable HalfArgsAndReturns if present in Args or if NativeHalfArgsAndReturns
2031  // is enabled.
2032  Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns)
2033                            | Opts.NativeHalfArgsAndReturns;
2034  Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
2035
2036  // __declspec is enabled by default for the PS4 by the driver, and also
2037  // enabled for Microsoft Extensions or Borland Extensions, here.
2038  //
2039  // FIXME: __declspec is also currently enabled for CUDA, but isn't really a
2040  // CUDA extension. However, it is required for supporting
2041  // __clang_cuda_builtin_vars.h, which uses __declspec(property). Once that has
2042  // been rewritten in terms of something more generic, remove the Opts.CUDA
2043  // term here.
2044  Opts.DeclSpecKeyword =
2045      Args.hasFlag(OPT_fdeclspec, OPT_fno_declspec,
2046                   (Opts.MicrosoftExt || Opts.Borland || Opts.CUDA));
2047
2048  // For now, we only support local submodule visibility in C++ (because we
2049  // heavily depend on the ODR for merging redefinitions).
2050  if (Opts.ModulesLocalVisibility && !Opts.CPlusPlus)
2051    Diags.Report(diag::err_drv_argument_not_allowed_with)
2052        << "-fmodules-local-submodule-visibility" << "C";
2053
2054  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
2055    switch (llvm::StringSwitch<unsigned>(A->getValue())
2056      .Case("target", LangOptions::ASMM_Target)
2057      .Case("no", LangOptions::ASMM_Off)
2058      .Case("yes", LangOptions::ASMM_On)
2059      .Default(255)) {
2060    default:
2061      Diags.Report(diag::err_drv_invalid_value)
2062        << "-faddress-space-map-mangling=" << A->getValue();
2063      break;
2064    case LangOptions::ASMM_Target:
2065      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
2066      break;
2067    case LangOptions::ASMM_On:
2068      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
2069      break;
2070    case LangOptions::ASMM_Off:
2071      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
2072      break;
2073    }
2074  }
2075
2076  if (Arg *A = Args.getLastArg(OPT_fms_memptr_rep_EQ)) {
2077    LangOptions::PragmaMSPointersToMembersKind InheritanceModel =
2078        llvm::StringSwitch<LangOptions::PragmaMSPointersToMembersKind>(
2079            A->getValue())
2080            .Case("single",
2081                  LangOptions::PPTMK_FullGeneralitySingleInheritance)
2082            .Case("multiple",
2083                  LangOptions::PPTMK_FullGeneralityMultipleInheritance)
2084            .Case("virtual",
2085                  LangOptions::PPTMK_FullGeneralityVirtualInheritance)
2086            .Default(LangOptions::PPTMK_BestCase);
2087    if (InheritanceModel == LangOptions::PPTMK_BestCase)
2088      Diags.Report(diag::err_drv_invalid_value)
2089          << "-fms-memptr-rep=" << A->getValue();
2090
2091    Opts.setMSPointerToMemberRepresentationMethod(InheritanceModel);
2092  }
2093
2094  // Check for MS default calling conventions being specified.
2095  if (Arg *A = Args.getLastArg(OPT_fdefault_calling_conv_EQ)) {
2096    LangOptions::DefaultCallingConvention DefaultCC =
2097        llvm::StringSwitch<LangOptions::DefaultCallingConvention>(
2098            A->getValue())
2099            .Case("cdecl", LangOptions::DCC_CDecl)
2100            .Case("fastcall", LangOptions::DCC_FastCall)
2101            .Case("stdcall", LangOptions::DCC_StdCall)
2102            .Case("vectorcall", LangOptions::DCC_VectorCall)
2103            .Default(LangOptions::DCC_None);
2104    if (DefaultCC == LangOptions::DCC_None)
2105      Diags.Report(diag::err_drv_invalid_value)
2106          << "-fdefault-calling-conv=" << A->getValue();
2107
2108    llvm::Triple T(TargetOpts.Triple);
2109    llvm::Triple::ArchType Arch = T.getArch();
2110    bool emitError = (DefaultCC == LangOptions::DCC_FastCall ||
2111                  DefaultCC == LangOptions::DCC_StdCall) &&
2112                 Arch != llvm::Triple::x86;
2113    emitError |= DefaultCC == LangOptions::DCC_VectorCall &&
2114                 !(Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64);
2115    if (emitError)
2116      Diags.Report(diag::err_drv_argument_not_allowed_with)
2117          << A->getSpelling() << T.getTriple();
2118    else
2119      Opts.setDefaultCallingConv(DefaultCC);
2120  }
2121
2122  // -mrtd option
2123  if (Arg *A = Args.getLastArg(OPT_mrtd)) {
2124    if (Opts.getDefaultCallingConv() != LangOptions::DCC_None)
2125      Diags.Report(diag::err_drv_argument_not_allowed_with)
2126          << A->getSpelling() << "-fdefault-calling-conv";
2127    else {
2128      llvm::Triple T(TargetOpts.Triple);
2129      if (T.getArch() != llvm::Triple::x86)
2130        Diags.Report(diag::err_drv_argument_not_allowed_with)
2131            << A->getSpelling() << T.getTriple();
2132      else
2133        Opts.setDefaultCallingConv(LangOptions::DCC_StdCall);
2134    }
2135  }
2136
2137  // Check if -fopenmp is specified.
2138  Opts.OpenMP = Args.hasArg(options::OPT_fopenmp) ? 1 : 0;
2139  Opts.OpenMPUseTLS =
2140      Opts.OpenMP && !Args.hasArg(options::OPT_fnoopenmp_use_tls);
2141  Opts.OpenMPIsDevice =
2142      Opts.OpenMP && Args.hasArg(options::OPT_fopenmp_is_device);
2143
2144  if (Opts.OpenMP) {
2145    int Version =
2146        getLastArgIntValue(Args, OPT_fopenmp_version_EQ, Opts.OpenMP, Diags);
2147    if (Version != 0)
2148      Opts.OpenMP = Version;
2149    // Provide diagnostic when a given target is not expected to be an OpenMP
2150    // device or host.
2151    if (!Opts.OpenMPIsDevice) {
2152      switch (T.getArch()) {
2153      default:
2154        break;
2155      // Add unsupported host targets here:
2156      case llvm::Triple::nvptx:
2157      case llvm::Triple::nvptx64:
2158        Diags.Report(clang::diag::err_drv_omp_host_target_not_supported)
2159            << TargetOpts.Triple;
2160        break;
2161      }
2162    }
2163  }
2164
2165  // Get the OpenMP target triples if any.
2166  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_targets_EQ)) {
2167
2168    for (unsigned i = 0; i < A->getNumValues(); ++i) {
2169      llvm::Triple TT(A->getValue(i));
2170
2171      if (TT.getArch() == llvm::Triple::UnknownArch)
2172        Diags.Report(clang::diag::err_drv_invalid_omp_target) << A->getValue(i);
2173      else
2174        Opts.OMPTargetTriples.push_back(TT);
2175    }
2176  }
2177
2178  // Get OpenMP host file path if any and report if a non existent file is
2179  // found
2180  if (Arg *A = Args.getLastArg(options::OPT_fopenmp_host_ir_file_path)) {
2181    Opts.OMPHostIRFile = A->getValue();
2182    if (!llvm::sys::fs::exists(Opts.OMPHostIRFile))
2183      Diags.Report(clang::diag::err_drv_omp_host_ir_file_not_found)
2184          << Opts.OMPHostIRFile;
2185  }
2186
2187  // Record whether the __DEPRECATED define was requested.
2188  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2189                                 OPT_fno_deprecated_macro,
2190                                 Opts.Deprecated);
2191
2192  // FIXME: Eliminate this dependency.
2193  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2194       OptSize = getOptimizationLevelSize(Args);
2195  Opts.Optimize = Opt != 0;
2196  Opts.OptimizeSize = OptSize != 0;
2197
2198  // This is the __NO_INLINE__ define, which just depends on things like the
2199  // optimization level and -fno-inline, not actually whether the backend has
2200  // inlining enabled.
2201  Opts.NoInlineDefine = !Opts.Optimize;
2202  if (Arg *InlineArg = Args.getLastArg(
2203          options::OPT_finline_functions, options::OPT_finline_hint_functions,
2204          options::OPT_fno_inline_functions, options::OPT_fno_inline))
2205    if (InlineArg->getOption().matches(options::OPT_fno_inline))
2206      Opts.NoInlineDefine = true;
2207
2208  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
2209      Args.hasArg(OPT_cl_fast_relaxed_math);
2210  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
2211      Args.hasArg(OPT_cl_finite_math_only) ||
2212      Args.hasArg(OPT_cl_fast_relaxed_math);
2213  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
2214                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
2215                      Args.hasArg(OPT_cl_fast_relaxed_math);
2216
2217  Opts.RetainCommentsFromSystemHeaders =
2218      Args.hasArg(OPT_fretain_comments_from_system_headers);
2219
2220  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
2221  switch (SSP) {
2222  default:
2223    Diags.Report(diag::err_drv_invalid_value)
2224      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2225    break;
2226  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2227  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2228  case 2: Opts.setStackProtector(LangOptions::SSPStrong); break;
2229  case 3: Opts.setStackProtector(LangOptions::SSPReq); break;
2230  }
2231
2232  // Parse -fsanitize= arguments.
2233  parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2234                      Diags, Opts.Sanitize);
2235  // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
2236  Opts.SanitizeAddressFieldPadding =
2237      getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
2238  Opts.SanitizerBlacklistFiles = Args.getAllArgValues(OPT_fsanitize_blacklist);
2239}
2240
2241static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2242                                  FileManager &FileMgr,
2243                                  DiagnosticsEngine &Diags) {
2244  using namespace options;
2245  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2246  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2247  if (const Arg *A = Args.getLastArg(OPT_token_cache))
2248      Opts.TokenCache = A->getValue();
2249  else
2250    Opts.TokenCache = Opts.ImplicitPTHInclude;
2251  Opts.UsePredefines = !Args.hasArg(OPT_undef);
2252  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2253  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2254
2255  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2256  for (const Arg *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
2257    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
2258
2259  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2260    StringRef Value(A->getValue());
2261    size_t Comma = Value.find(',');
2262    unsigned Bytes = 0;
2263    unsigned EndOfLine = 0;
2264
2265    if (Comma == StringRef::npos ||
2266        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2267        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2268      Diags.Report(diag::err_drv_preamble_format);
2269    else {
2270      Opts.PrecompiledPreambleBytes.first = Bytes;
2271      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2272    }
2273  }
2274
2275  // Add macros from the command line.
2276  for (const Arg *A : Args.filtered(OPT_D, OPT_U)) {
2277    if (A->getOption().matches(OPT_D))
2278      Opts.addMacroDef(A->getValue());
2279    else
2280      Opts.addMacroUndef(A->getValue());
2281  }
2282
2283  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2284
2285  // Add the ordered list of -includes.
2286  for (const Arg *A : Args.filtered(OPT_include))
2287    Opts.Includes.emplace_back(A->getValue());
2288
2289  for (const Arg *A : Args.filtered(OPT_chain_include))
2290    Opts.ChainedIncludes.emplace_back(A->getValue());
2291
2292  for (const Arg *A : Args.filtered(OPT_remap_file)) {
2293    std::pair<StringRef, StringRef> Split = StringRef(A->getValue()).split(';');
2294
2295    if (Split.second.empty()) {
2296      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2297      continue;
2298    }
2299
2300    Opts.addRemappedFile(Split.first, Split.second);
2301  }
2302
2303  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2304    StringRef Name = A->getValue();
2305    unsigned Library = llvm::StringSwitch<unsigned>(Name)
2306      .Case("libc++", ARCXX_libcxx)
2307      .Case("libstdc++", ARCXX_libstdcxx)
2308      .Case("none", ARCXX_nolib)
2309      .Default(~0U);
2310    if (Library == ~0U)
2311      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2312    else
2313      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2314  }
2315}
2316
2317static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2318                                        ArgList &Args,
2319                                        frontend::ActionKind Action) {
2320  using namespace options;
2321
2322  switch (Action) {
2323  case frontend::ASTDeclList:
2324  case frontend::ASTDump:
2325  case frontend::ASTPrint:
2326  case frontend::ASTView:
2327  case frontend::EmitAssembly:
2328  case frontend::EmitBC:
2329  case frontend::EmitHTML:
2330  case frontend::EmitLLVM:
2331  case frontend::EmitLLVMOnly:
2332  case frontend::EmitCodeGenOnly:
2333  case frontend::EmitObj:
2334  case frontend::FixIt:
2335  case frontend::GenerateModule:
2336  case frontend::GenerateModuleInterface:
2337  case frontend::GeneratePCH:
2338  case frontend::GeneratePTH:
2339  case frontend::ParseSyntaxOnly:
2340  case frontend::ModuleFileInfo:
2341  case frontend::VerifyPCH:
2342  case frontend::PluginAction:
2343  case frontend::PrintDeclContext:
2344  case frontend::RewriteObjC:
2345  case frontend::RewriteTest:
2346  case frontend::RunAnalysis:
2347  case frontend::MigrateSource:
2348    Opts.ShowCPP = 0;
2349    break;
2350
2351  case frontend::DumpRawTokens:
2352  case frontend::DumpTokens:
2353  case frontend::InitOnly:
2354  case frontend::PrintPreamble:
2355  case frontend::PrintPreprocessedInput:
2356  case frontend::RewriteMacros:
2357  case frontend::RunPreprocessorOnly:
2358    Opts.ShowCPP = !Args.hasArg(OPT_dM);
2359    break;
2360  }
2361
2362  Opts.ShowComments = Args.hasArg(OPT_C);
2363  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2364  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2365  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2366  Opts.ShowIncludeDirectives = Args.hasArg(OPT_dI);
2367  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2368  Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
2369}
2370
2371static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args,
2372                            DiagnosticsEngine &Diags) {
2373  using namespace options;
2374  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2375  if (Arg *A = Args.getLastArg(OPT_meabi)) {
2376    StringRef Value = A->getValue();
2377    llvm::EABI EABIVersion = llvm::StringSwitch<llvm::EABI>(Value)
2378                                 .Case("default", llvm::EABI::Default)
2379                                 .Case("4", llvm::EABI::EABI4)
2380                                 .Case("5", llvm::EABI::EABI5)
2381                                 .Case("gnu", llvm::EABI::GNU)
2382                                 .Default(llvm::EABI::Unknown);
2383    if (EABIVersion == llvm::EABI::Unknown)
2384      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
2385                                                << Value;
2386    else
2387      Opts.EABIVersion = Value;
2388  }
2389  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2390  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
2391  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2392  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2393  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2394  Opts.Reciprocals = Args.getAllArgValues(OPT_mrecip_EQ);
2395  // Use the default target triple if unspecified.
2396  if (Opts.Triple.empty())
2397    Opts.Triple = llvm::sys::getDefaultTargetTriple();
2398  Opts.OpenCLExtensionsAsWritten = Args.getAllArgValues(OPT_cl_ext_EQ);
2399}
2400
2401bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2402                                        const char *const *ArgBegin,
2403                                        const char *const *ArgEnd,
2404                                        DiagnosticsEngine &Diags) {
2405  bool Success = true;
2406
2407  // Parse the arguments.
2408  std::unique_ptr<OptTable> Opts(createDriverOptTable());
2409  const unsigned IncludedFlagsBitmask = options::CC1Option;
2410  unsigned MissingArgIndex, MissingArgCount;
2411  InputArgList Args =
2412      Opts->ParseArgs(llvm::makeArrayRef(ArgBegin, ArgEnd), MissingArgIndex,
2413                      MissingArgCount, IncludedFlagsBitmask);
2414  LangOptions &LangOpts = *Res.getLangOpts();
2415
2416  // Check for missing argument error.
2417  if (MissingArgCount) {
2418    Diags.Report(diag::err_drv_missing_argument)
2419        << Args.getArgString(MissingArgIndex) << MissingArgCount;
2420    Success = false;
2421  }
2422
2423  // Issue errors on unknown arguments.
2424  for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
2425    Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
2426    Success = false;
2427  }
2428
2429  Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
2430  Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
2431  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
2432  Success &=
2433      ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
2434                          false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
2435  ParseCommentArgs(LangOpts.CommentOpts, Args);
2436  ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
2437  // FIXME: We shouldn't have to pass the DashX option around here
2438  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), Args, Diags,
2439                                      LangOpts.IsHeaderFile);
2440  ParseTargetArgs(Res.getTargetOpts(), Args, Diags);
2441  Success &= ParseCodeGenArgs(Res.getCodeGenOpts(), Args, DashX, Diags,
2442                              Res.getTargetOpts());
2443  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), Args);
2444  if (DashX == IK_AST || DashX == IK_LLVM_IR) {
2445    // ObjCAAutoRefCount and Sanitize LangOpts are used to setup the
2446    // PassManager in BackendUtil.cpp. They need to be initializd no matter
2447    // what the input type is.
2448    if (Args.hasArg(OPT_fobjc_arc))
2449      LangOpts.ObjCAutoRefCount = 1;
2450    // PIClevel and PIELevel are needed during code generation and this should be
2451    // set regardless of the input type.
2452    LangOpts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
2453    LangOpts.PIE = Args.hasArg(OPT_pic_is_pie);
2454    parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
2455                        Diags, LangOpts.Sanitize);
2456  } else {
2457    // Other LangOpts are only initialzed when the input is not AST or LLVM IR.
2458    ParseLangArgs(LangOpts, Args, DashX, Res.getTargetOpts(),
2459      Res.getPreprocessorOpts(), Diags);
2460    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2461      LangOpts.ObjCExceptions = 1;
2462  }
2463
2464  if (LangOpts.CUDA) {
2465    // During CUDA device-side compilation, the aux triple is the
2466    // triple used for host compilation.
2467    if (LangOpts.CUDAIsDevice)
2468      Res.getTargetOpts().HostTriple = Res.getFrontendOpts().AuxTriple;
2469
2470    // Set default FP_CONTRACT to FAST.
2471    if (!Args.hasArg(OPT_ffp_contract))
2472      Res.getCodeGenOpts().setFPContractMode(CodeGenOptions::FPC_Fast);
2473  }
2474
2475  // FIXME: Override value name discarding when asan or msan is used because the
2476  // backend passes depend on the name of the alloca in order to print out
2477  // names.
2478  Res.getCodeGenOpts().DiscardValueNames &=
2479      !LangOpts.Sanitize.has(SanitizerKind::Address) &&
2480      !LangOpts.Sanitize.has(SanitizerKind::Memory);
2481
2482  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2483  // PCH file and find the original header name. Remove the need to do that in
2484  // ParsePreprocessorArgs and remove the FileManager
2485  // parameters from the function and the "FileManager.h" #include.
2486  FileManager FileMgr(Res.getFileSystemOpts());
2487  ParsePreprocessorArgs(Res.getPreprocessorOpts(), Args, FileMgr, Diags);
2488  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), Args,
2489                              Res.getFrontendOpts().ProgramAction);
2490
2491  // Turn on -Wspir-compat for SPIR target.
2492  llvm::Triple T(Res.getTargetOpts().Triple);
2493  auto Arch = T.getArch();
2494  if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) {
2495    Res.getDiagnosticOpts().Warnings.push_back("spir-compat");
2496  }
2497  return Success;
2498}
2499
2500std::string CompilerInvocation::getModuleHash() const {
2501  // Note: For QoI reasons, the things we use as a hash here should all be
2502  // dumped via the -module-info flag.
2503  using llvm::hash_code;
2504  using llvm::hash_value;
2505  using llvm::hash_combine;
2506
2507  // Start the signature with the compiler version.
2508  // FIXME: We'd rather use something more cryptographically sound than
2509  // CityHash, but this will do for now.
2510  hash_code code = hash_value(getClangFullRepositoryVersion());
2511
2512  // Extend the signature with the language options
2513#define LANGOPT(Name, Bits, Default, Description) \
2514   code = hash_combine(code, LangOpts->Name);
2515#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2516  code = hash_combine(code, static_cast<unsigned>(LangOpts->get##Name()));
2517#define BENIGN_LANGOPT(Name, Bits, Default, Description)
2518#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2519#include "clang/Basic/LangOptions.def"
2520
2521  for (StringRef Feature : LangOpts->ModuleFeatures)
2522    code = hash_combine(code, Feature);
2523
2524  // Extend the signature with the target options.
2525  code = hash_combine(code, TargetOpts->Triple, TargetOpts->CPU,
2526                      TargetOpts->ABI);
2527  for (unsigned i = 0, n = TargetOpts->FeaturesAsWritten.size(); i != n; ++i)
2528    code = hash_combine(code, TargetOpts->FeaturesAsWritten[i]);
2529
2530  // Extend the signature with preprocessor options.
2531  const PreprocessorOptions &ppOpts = getPreprocessorOpts();
2532  const HeaderSearchOptions &hsOpts = getHeaderSearchOpts();
2533  code = hash_combine(code, ppOpts.UsePredefines, ppOpts.DetailedRecord);
2534
2535  for (std::vector<std::pair<std::string, bool/*isUndef*/>>::const_iterator
2536            I = getPreprocessorOpts().Macros.begin(),
2537         IEnd = getPreprocessorOpts().Macros.end();
2538       I != IEnd; ++I) {
2539    // If we're supposed to ignore this macro for the purposes of modules,
2540    // don't put it into the hash.
2541    if (!hsOpts.ModulesIgnoreMacros.empty()) {
2542      // Check whether we're ignoring this macro.
2543      StringRef MacroDef = I->first;
2544      if (hsOpts.ModulesIgnoreMacros.count(
2545              llvm::CachedHashString(MacroDef.split('=').first)))
2546        continue;
2547    }
2548
2549    code = hash_combine(code, I->first, I->second);
2550  }
2551
2552  // Extend the signature with the sysroot and other header search options.
2553  code = hash_combine(code, hsOpts.Sysroot,
2554                      hsOpts.ModuleFormat,
2555                      hsOpts.UseDebugInfo,
2556                      hsOpts.UseBuiltinIncludes,
2557                      hsOpts.UseStandardSystemIncludes,
2558                      hsOpts.UseStandardCXXIncludes,
2559                      hsOpts.UseLibcxx,
2560                      hsOpts.ModulesValidateDiagnosticOptions);
2561  code = hash_combine(code, hsOpts.ResourceDir);
2562
2563  // Extend the signature with the user build path.
2564  code = hash_combine(code, hsOpts.ModuleUserBuildPath);
2565
2566  // Extend the signature with the module file extensions.
2567  const FrontendOptions &frontendOpts = getFrontendOpts();
2568  for (const auto &ext : frontendOpts.ModuleFileExtensions) {
2569    code = ext->hashExtension(code);
2570  }
2571
2572  // Darwin-specific hack: if we have a sysroot, use the contents and
2573  // modification time of
2574  //   $sysroot/System/Library/CoreServices/SystemVersion.plist
2575  // as part of the module hash.
2576  if (!hsOpts.Sysroot.empty()) {
2577    SmallString<128> systemVersionFile;
2578    systemVersionFile += hsOpts.Sysroot;
2579    llvm::sys::path::append(systemVersionFile, "System");
2580    llvm::sys::path::append(systemVersionFile, "Library");
2581    llvm::sys::path::append(systemVersionFile, "CoreServices");
2582    llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
2583
2584    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
2585        llvm::MemoryBuffer::getFile(systemVersionFile);
2586    if (buffer) {
2587      code = hash_combine(code, buffer.get()->getBuffer());
2588
2589      struct stat statBuf;
2590      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
2591        code = hash_combine(code, statBuf.st_mtime);
2592    }
2593  }
2594
2595  return llvm::APInt(64, code).toString(36, /*Signed=*/false);
2596}
2597
2598namespace clang {
2599
2600template<typename IntTy>
2601static IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
2602                                    IntTy Default,
2603                                    DiagnosticsEngine *Diags) {
2604  IntTy Res = Default;
2605  if (Arg *A = Args.getLastArg(Id)) {
2606    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
2607      if (Diags)
2608        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
2609                                                       << A->getValue();
2610    }
2611  }
2612  return Res;
2613}
2614
2615
2616// Declared in clang/Frontend/Utils.h.
2617int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
2618                       DiagnosticsEngine *Diags) {
2619  return getLastArgIntValueImpl<int>(Args, Id, Default, Diags);
2620}
2621
2622uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
2623                               uint64_t Default,
2624                               DiagnosticsEngine *Diags) {
2625  return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags);
2626}
2627
2628void BuryPointer(const void *Ptr) {
2629  // This function may be called only a small fixed amount of times per each
2630  // invocation, otherwise we do actually have a leak which we want to report.
2631  // If this function is called more than kGraveYardMaxSize times, the pointers
2632  // will not be properly buried and a leak detector will report a leak, which
2633  // is what we want in such case.
2634  static const size_t kGraveYardMaxSize = 16;
2635  LLVM_ATTRIBUTE_UNUSED static const void *GraveYard[kGraveYardMaxSize];
2636  static std::atomic<unsigned> GraveYardSize;
2637  unsigned Idx = GraveYardSize++;
2638  if (Idx >= kGraveYardMaxSize)
2639    return;
2640  GraveYard[Idx] = Ptr;
2641}
2642
2643IntrusiveRefCntPtr<vfs::FileSystem>
2644createVFSFromCompilerInvocation(const CompilerInvocation &CI,
2645                                DiagnosticsEngine &Diags) {
2646  if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
2647    return vfs::getRealFileSystem();
2648
2649  IntrusiveRefCntPtr<vfs::OverlayFileSystem>
2650    Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
2651  // earlier vfs files are on the bottom
2652  for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
2653    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
2654        llvm::MemoryBuffer::getFile(File);
2655    if (!Buffer) {
2656      Diags.Report(diag::err_missing_vfs_overlay_file) << File;
2657      return IntrusiveRefCntPtr<vfs::FileSystem>();
2658    }
2659
2660    IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getVFSFromYAML(
2661        std::move(Buffer.get()), /*DiagHandler*/ nullptr, File);
2662    if (!FS.get()) {
2663      Diags.Report(diag::err_invalid_vfs_overlay) << File;
2664      return IntrusiveRefCntPtr<vfs::FileSystem>();
2665    }
2666    Overlay->pushOverlay(FS);
2667  }
2668  return Overlay;
2669}
2670} // end namespace clang
2671