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