CompilerInvocation.cpp revision 02c23ebf41ae2f70da0ba7337e05c51fbfe35f7f 
1//===--- CompilerInvocation.cpp -------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Frontend/CompilerInvocation.h"
11#include "clang/Basic/Diagnostic.h"
12#include "clang/Basic/Version.h"
13#include "clang/Basic/FileManager.h"
14#include "clang/Driver/Arg.h"
15#include "clang/Driver/ArgList.h"
16#include "clang/Driver/Options.h"
17#include "clang/Driver/DriverDiagnostic.h"
18#include "clang/Driver/OptTable.h"
19#include "clang/Driver/Option.h"
20#include "clang/Frontend/CompilerInvocation.h"
21#include "clang/Frontend/LangStandard.h"
22#include "clang/Serialization/ASTReader.h"
23#include "llvm/ADT/OwningPtr.h"
24#include "llvm/ADT/SmallVector.h"
25#include "llvm/ADT/StringExtras.h"
26#include "llvm/ADT/StringSwitch.h"
27#include "llvm/ADT/Triple.h"
28#include "llvm/Support/ErrorHandling.h"
29#include "llvm/Support/Host.h"
30#include "llvm/Support/Path.h"
31using namespace clang;
32
33//===----------------------------------------------------------------------===//
34// Initialization.
35//===----------------------------------------------------------------------===//
36
37CompilerInvocationBase::CompilerInvocationBase()
38  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()),
39    DiagnosticOpts(new DiagnosticOptions()) {}
40
41CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
42  : RefCountedBase<CompilerInvocation>(),
43    LangOpts(new LangOptions(*X.getLangOpts())),
44    TargetOpts(new TargetOptions(X.getTargetOpts())),
45    DiagnosticOpts(new DiagnosticOptions(X.getDiagnosticOpts())) {}
46
47//===----------------------------------------------------------------------===//
48// Utility functions.
49//===----------------------------------------------------------------------===//
50
51static const char *getAnalysisStoreName(AnalysisStores Kind) {
52  switch (Kind) {
53  default:
54    llvm_unreachable("Unknown analysis store!");
55#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
56  case NAME##Model: return CMDFLAG;
57#include "clang/StaticAnalyzer/Core/Analyses.def"
58  }
59}
60
61static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
62  switch (Kind) {
63  default:
64    llvm_unreachable("Unknown analysis constraints!");
65#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
66  case NAME##Model: return CMDFLAG;
67#include "clang/StaticAnalyzer/Core/Analyses.def"
68  }
69}
70
71static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
72  switch (Kind) {
73  default:
74    llvm_unreachable("Unknown analysis client!");
75#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
76  case PD_##NAME: return CMDFLAG;
77#include "clang/StaticAnalyzer/Core/Analyses.def"
78  }
79}
80
81static const char *getAnalysisPurgeModeName(AnalysisPurgeMode Kind) {
82  switch (Kind) {
83  default:
84    llvm_unreachable("Unknown analysis purge mode!");
85#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
86  case NAME: return CMDFLAG;
87#include "clang/StaticAnalyzer/Core/Analyses.def"
88  }
89}
90
91static const char *getAnalysisIPAModeName(AnalysisIPAMode Kind) {
92  switch (Kind) {
93  default:
94    llvm_unreachable("Unknown analysis ipa mode!");
95#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
96  case NAME: return CMDFLAG;
97#include "clang/StaticAnalyzer/Core/Analyses.def"
98  }
99}
100
101static const char *
102  getAnalysisInliningModeName(AnalysisInliningMode Kind) {
103  switch (Kind) {
104  default:
105    llvm_unreachable("Unknown analysis inlining mode!");
106#define ANALYSIS_INLINE_SELECTION(NAME, CMDFLAG, DESC) \
107  case NAME: return CMDFLAG;
108#include "clang/StaticAnalyzer/Core/Analyses.def"
109  }
110}
111
112//===----------------------------------------------------------------------===//
113// Serialization (to args)
114//===----------------------------------------------------------------------===//
115
116namespace {
117  /// ToArgsList - Helper class to create a list of std::strings.
118  class ToArgsList {
119    std::vector<std::string> &Res;
120  public:
121    explicit ToArgsList(std::vector<std::string> &Res) : Res(Res) {}
122
123    void push_back(StringRef Str) {
124      // Avoid creating a temporary string.
125      Res.push_back(std::string());
126      Res.back().assign(Str.data(), Str.size());
127    }
128
129    void push_back(StringRef Str1, StringRef Str2) {
130      push_back(Str1);
131      push_back(Str2);
132    }
133  };
134}
135
136static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts, ToArgsList &Res) {
137  if (Opts.ShowCheckerHelp)
138    Res.push_back("-analyzer-checker-help");
139  if (Opts.AnalysisStoreOpt != RegionStoreModel)
140    Res.push_back("-analyzer-store",
141                  getAnalysisStoreName(Opts.AnalysisStoreOpt));
142  if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel)
143    Res.push_back("-analyzer-constraints",
144                  getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
145  if (Opts.AnalysisDiagOpt != PD_HTML)
146    Res.push_back("-analyzer-output",
147                  getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
148  if (Opts.AnalysisPurgeOpt != PurgeStmt)
149    Res.push_back("-analyzer-purge",
150                  getAnalysisPurgeModeName(Opts.AnalysisPurgeOpt));
151  if (!Opts.AnalyzeSpecificFunction.empty())
152    Res.push_back("-analyze-function", Opts.AnalyzeSpecificFunction);
153  if (Opts.IPAMode != DynamicDispatchBifurcate)
154    Res.push_back("-analyzer-ipa", getAnalysisIPAModeName(Opts.IPAMode));
155  if (Opts.InliningMode != NoRedundancy)
156    Res.push_back("-analyzer-inlining-mode",
157                  getAnalysisInliningModeName(Opts.InliningMode));
158
159  if (Opts.AnalyzeAll)
160    Res.push_back("-analyzer-opt-analyze-headers");
161  if (Opts.AnalyzerDisplayProgress)
162    Res.push_back("-analyzer-display-progress");
163  if (Opts.AnalyzeNestedBlocks)
164    Res.push_back("-analyzer-opt-analyze-nested-blocks");
165  if (Opts.eagerlyAssumeBinOpBifurcation)
166    Res.push_back("-analyzer-eagerly-assume");
167  if (Opts.TrimGraph)
168    Res.push_back("-trim-egraph");
169  if (Opts.visualizeExplodedGraphWithGraphViz)
170    Res.push_back("-analyzer-viz-egraph-graphviz");
171  if (Opts.visualizeExplodedGraphWithUbiGraph)
172    Res.push_back("-analyzer-viz-egraph-ubigraph");
173  if (Opts.NoRetryExhausted)
174    Res.push_back("-analyzer-disable-retry-exhausted");
175
176  for (unsigned i = 0, e = Opts.CheckersControlList.size(); i != e; ++i) {
177    const std::pair<std::string, bool> &opt = Opts.CheckersControlList[i];
178    if (opt.second)
179      Res.push_back("-analyzer-disable-checker");
180    else
181      Res.push_back("-analyzer-checker");
182    Res.push_back(opt.first);
183  }
184}
185
186static void CodeGenOptsToArgs(const CodeGenOptions &Opts, ToArgsList &Res) {
187  switch (Opts.getDebugInfo()) {
188    case CodeGenOptions::NoDebugInfo:
189      break;
190    case CodeGenOptions::DebugLineTablesOnly:
191      Res.push_back("-gline-tables-only");
192      break;
193    case CodeGenOptions::LimitedDebugInfo:
194      Res.push_back("-g");
195      Res.push_back("-flimit-debug-info");
196      break;
197    case CodeGenOptions::FullDebugInfo:
198      Res.push_back("-g");
199      Res.push_back("-fno-limit-debug-info");
200      break;
201  }
202  if (Opts.DebugColumnInfo)
203    Res.push_back("-gcolumn-info");
204  if (Opts.DisableLLVMOpts)
205    Res.push_back("-disable-llvm-optzns");
206  if (Opts.DisableRedZone)
207    Res.push_back("-disable-red-zone");
208  if (Opts.DisableTailCalls)
209    Res.push_back("-mdisable-tail-calls");
210  if (!Opts.DebugCompilationDir.empty())
211    Res.push_back("-fdebug-compilation-dir", Opts.DebugCompilationDir);
212  if (!Opts.DwarfDebugFlags.empty())
213    Res.push_back("-dwarf-debug-flags", Opts.DwarfDebugFlags);
214  if (Opts.EmitGcovArcs)
215    Res.push_back("-femit-coverage-data");
216  if (Opts.EmitGcovNotes)
217    Res.push_back("-femit-coverage-notes");
218  if (Opts.EmitOpenCLArgMetadata)
219    Res.push_back("-cl-kernel-arg-info");
220  if (!Opts.MergeAllConstants)
221    Res.push_back("-fno-merge-all-constants");
222  if (Opts.NoCommon)
223    Res.push_back("-fno-common");
224  if (Opts.ForbidGuardVariables)
225    Res.push_back("-fforbid-guard-variables");
226  if (Opts.UseRegisterSizedBitfieldAccess)
227    Res.push_back("-fuse-register-sized-bitfield-access");
228  if (Opts.NoImplicitFloat)
229    Res.push_back("-no-implicit-float");
230  if (Opts.OmitLeafFramePointer)
231    Res.push_back("-momit-leaf-frame-pointer");
232  if (Opts.OptimizeSize) {
233    assert(Opts.OptimizationLevel == 2 && "Invalid options!");
234    Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
235  } else if (Opts.OptimizationLevel != 0)
236    Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
237  if (!Opts.MainFileName.empty())
238    Res.push_back("-main-file-name", Opts.MainFileName);
239  if (Opts.NoInfsFPMath)
240    Res.push_back("-menable-no-infinities");
241  if (Opts.NoNaNsFPMath)
242    Res.push_back("-menable-no-nans");
243  // SimplifyLibCalls is only derived.
244  // TimePasses is only derived.
245  // UnitAtATime is unused.
246  // Inlining is only derived.
247
248  // UnrollLoops is derived, but also accepts an option, no
249  // harm in pushing it back here.
250  if (Opts.UnrollLoops)
251    Res.push_back("-funroll-loops");
252  if (Opts.DataSections)
253    Res.push_back("-fdata-sections");
254  if (Opts.FunctionSections)
255    Res.push_back("-ffunction-sections");
256  if (Opts.AsmVerbose)
257    Res.push_back("-masm-verbose");
258  if (!Opts.CodeModel.empty())
259    Res.push_back("-mcode-model", Opts.CodeModel);
260  if (Opts.CUDAIsDevice)
261    Res.push_back("-fcuda-is-device");
262  if (!Opts.CXAAtExit)
263    Res.push_back("-fno-use-cxa-atexit");
264  if (Opts.CXXCtorDtorAliases)
265    Res.push_back("-mconstructor-aliases");
266  if (Opts.ObjCAutoRefCountExceptions)
267    Res.push_back("-fobjc-arc-eh");
268  if (!Opts.DebugPass.empty()) {
269    Res.push_back("-mdebug-pass", Opts.DebugPass);
270  }
271  if (Opts.DisableFPElim)
272    Res.push_back("-mdisable-fp-elim");
273  if (!Opts.FloatABI.empty())
274    Res.push_back("-mfloat-abi", Opts.FloatABI);
275  if (!Opts.LimitFloatPrecision.empty())
276    Res.push_back("-mlimit-float-precision", Opts.LimitFloatPrecision);
277  if (Opts.NoZeroInitializedInBSS)
278    Res.push_back("-mno-zero-initialized-bss");
279  switch (Opts.getObjCDispatchMethod()) {
280  case CodeGenOptions::Legacy:
281    break;
282  case CodeGenOptions::Mixed:
283    Res.push_back("-fobjc-dispatch-method=mixed");
284    break;
285  case CodeGenOptions::NonLegacy:
286    Res.push_back("-fobjc-dispatch-method=non-legacy");
287    break;
288  }
289  if (Opts.BoundsChecking > 0)
290    Res.push_back("-fbounds-checking=" + llvm::utostr(Opts.BoundsChecking));
291  if (Opts.NumRegisterParameters)
292    Res.push_back("-mregparm", llvm::utostr(Opts.NumRegisterParameters));
293  if (Opts.NoGlobalMerge)
294    Res.push_back("-mno-global-merge");
295  if (Opts.NoExecStack)
296    Res.push_back("-mnoexecstack");
297  if (Opts.RelaxAll)
298    Res.push_back("-mrelax-all");
299  if (Opts.SaveTempLabels)
300    Res.push_back("-msave-temp-labels");
301  if (Opts.NoDwarf2CFIAsm)
302    Res.push_back("-fno-dwarf2-cfi-asm");
303  if (Opts.NoDwarfDirectoryAsm)
304    Res.push_back("-fno-dwarf-directory-asm");
305  if (Opts.SoftFloat)
306    Res.push_back("-msoft-float");
307  if (Opts.StrictEnums)
308    Res.push_back("-fstrict-enums");
309  if (Opts.UnwindTables)
310    Res.push_back("-munwind-tables");
311  if (Opts.RelocationModel != "pic")
312    Res.push_back("-mrelocation-model", Opts.RelocationModel);
313  if (!Opts.VerifyModule)
314    Res.push_back("-disable-llvm-verifier");
315  for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i)
316    Res.push_back("-backend-option", Opts.BackendOptions[i]);
317
318  switch (Opts.getDefaultTLSModel()) {
319  case CodeGenOptions::GeneralDynamicTLSModel:
320    break;
321  case CodeGenOptions::LocalDynamicTLSModel:
322    Res.push_back("-ftls-model=local-dynamic");
323    break;
324  case CodeGenOptions::InitialExecTLSModel:
325    Res.push_back("-ftls-model=initial-exec");
326    break;
327  case CodeGenOptions::LocalExecTLSModel:
328    Res.push_back("-ftls-model=local-exec");
329    break;
330  }
331}
332
333static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
334                                       ToArgsList &Res) {
335  if (Opts.IncludeSystemHeaders)
336    Res.push_back("-sys-header-deps");
337  if (Opts.ShowHeaderIncludes)
338    Res.push_back("-H");
339  if (!Opts.HeaderIncludeOutputFile.empty())
340    Res.push_back("-header-include-file", Opts.HeaderIncludeOutputFile);
341  if (Opts.UsePhonyTargets)
342    Res.push_back("-MP");
343  if (!Opts.OutputFile.empty())
344    Res.push_back("-dependency-file", Opts.OutputFile);
345  for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i)
346    Res.push_back("-MT", Opts.Targets[i]);
347}
348
349static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
350                                 ToArgsList &Res) {
351  if (Opts.IgnoreWarnings)
352    Res.push_back("-w");
353  if (Opts.NoRewriteMacros)
354    Res.push_back("-Wno-rewrite-macros");
355  if (Opts.Pedantic)
356    Res.push_back("-pedantic");
357  if (Opts.PedanticErrors)
358    Res.push_back("-pedantic-errors");
359  if (!Opts.ShowColumn)
360    Res.push_back("-fno-show-column");
361  if (!Opts.ShowLocation)
362    Res.push_back("-fno-show-source-location");
363  if (!Opts.ShowCarets)
364    Res.push_back("-fno-caret-diagnostics");
365  if (!Opts.ShowFixits)
366    Res.push_back("-fno-diagnostics-fixit-info");
367  if (Opts.ShowSourceRanges)
368    Res.push_back("-fdiagnostics-print-source-range-info");
369  if (Opts.ShowParseableFixits)
370    Res.push_back("-fdiagnostics-parseable-fixits");
371  if (Opts.ShowColors)
372    Res.push_back("-fcolor-diagnostics");
373  if (Opts.VerifyDiagnostics)
374    Res.push_back("-verify");
375  if (Opts.ShowOptionNames)
376    Res.push_back("-fdiagnostics-show-option");
377  if (Opts.ShowCategories == 1)
378    Res.push_back("-fdiagnostics-show-category=id");
379  else if (Opts.ShowCategories == 2)
380    Res.push_back("-fdiagnostics-show-category=name");
381  switch (Opts.Format) {
382  case DiagnosticOptions::Clang:
383    Res.push_back("-fdiagnostics-format=clang"); break;
384  case DiagnosticOptions::Msvc:
385    Res.push_back("-fdiagnostics-format=msvc");  break;
386  case DiagnosticOptions::Vi:
387    Res.push_back("-fdiagnostics-format=vi");    break;
388  }
389  if (Opts.ErrorLimit)
390    Res.push_back("-ferror-limit", llvm::utostr(Opts.ErrorLimit));
391  if (!Opts.DiagnosticLogFile.empty())
392    Res.push_back("-diagnostic-log-file", Opts.DiagnosticLogFile);
393  if (Opts.MacroBacktraceLimit
394                        != DiagnosticOptions::DefaultMacroBacktraceLimit)
395    Res.push_back("-fmacro-backtrace-limit",
396                  llvm::utostr(Opts.MacroBacktraceLimit));
397  if (Opts.TemplateBacktraceLimit
398                        != DiagnosticOptions::DefaultTemplateBacktraceLimit)
399    Res.push_back("-ftemplate-backtrace-limit",
400                  llvm::utostr(Opts.TemplateBacktraceLimit));
401  if (Opts.ConstexprBacktraceLimit
402                        != DiagnosticOptions::DefaultConstexprBacktraceLimit)
403    Res.push_back("-fconstexpr-backtrace-limit",
404                  llvm::utostr(Opts.ConstexprBacktraceLimit));
405
406  if (Opts.TabStop != DiagnosticOptions::DefaultTabStop)
407    Res.push_back("-ftabstop", llvm::utostr(Opts.TabStop));
408  if (Opts.MessageLength)
409    Res.push_back("-fmessage-length", llvm::utostr(Opts.MessageLength));
410  if (!Opts.DumpBuildInformation.empty())
411    Res.push_back("-dump-build-information", Opts.DumpBuildInformation);
412  for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
413    Res.push_back("-W" + Opts.Warnings[i]);
414}
415
416static const char *getInputKindName(InputKind Kind) {
417  switch (Kind) {
418  case IK_None:              break;
419  case IK_AST:               return "ast";
420  case IK_Asm:               return "assembler-with-cpp";
421  case IK_C:                 return "c";
422  case IK_CXX:               return "c++";
423  case IK_LLVM_IR:           return "ir";
424  case IK_ObjC:              return "objective-c";
425  case IK_ObjCXX:            return "objective-c++";
426  case IK_OpenCL:            return "cl";
427  case IK_CUDA:              return "cuda";
428  case IK_PreprocessedC:     return "cpp-output";
429  case IK_PreprocessedCXX:   return "c++-cpp-output";
430  case IK_PreprocessedObjC:  return "objective-c-cpp-output";
431  case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
432  }
433
434  llvm_unreachable("Unexpected language kind!");
435}
436
437static const char *getActionName(frontend::ActionKind Kind) {
438  switch (Kind) {
439  case frontend::PluginAction:
440    llvm_unreachable("Invalid kind!");
441
442  case frontend::ASTDeclList:            return "-ast-list";
443  case frontend::ASTDump:                return "-ast-dump";
444  case frontend::ASTDumpXML:             return "-ast-dump-xml";
445  case frontend::ASTPrint:               return "-ast-print";
446  case frontend::ASTView:                return "-ast-view";
447  case frontend::DumpRawTokens:          return "-dump-raw-tokens";
448  case frontend::DumpTokens:             return "-dump-tokens";
449  case frontend::EmitAssembly:           return "-S";
450  case frontend::EmitBC:                 return "-emit-llvm-bc";
451  case frontend::EmitHTML:               return "-emit-html";
452  case frontend::EmitLLVM:               return "-emit-llvm";
453  case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
454  case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
455  case frontend::EmitObj:                return "-emit-obj";
456  case frontend::FixIt:                  return "-fixit";
457  case frontend::GenerateModule:         return "-emit-module";
458  case frontend::GeneratePCH:            return "-emit-pch";
459  case frontend::GeneratePTH:            return "-emit-pth";
460  case frontend::InitOnly:               return "-init-only";
461  case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
462  case frontend::PrintDeclContext:       return "-print-decl-contexts";
463  case frontend::PrintPreamble:          return "-print-preamble";
464  case frontend::PrintPreprocessedInput: return "-E";
465  case frontend::RewriteMacros:          return "-rewrite-macros";
466  case frontend::RewriteObjC:            return "-rewrite-objc";
467  case frontend::RewriteTest:            return "-rewrite-test";
468  case frontend::RunAnalysis:            return "-analyze";
469  case frontend::MigrateSource:          return "-migrate";
470  case frontend::RunPreprocessorOnly:    return "-Eonly";
471  }
472
473  llvm_unreachable("Unexpected language kind!");
474}
475
476static void FileSystemOptsToArgs(const FileSystemOptions &Opts, ToArgsList &Res){
477  if (!Opts.WorkingDir.empty())
478    Res.push_back("-working-directory", Opts.WorkingDir);
479}
480
481static void CodeCompleteOptionsToArgs(const CodeCompleteOptions &Opts,
482                                      ToArgsList &Res) {
483  if (Opts.IncludeMacros)
484    Res.push_back("-code-completion-macros");
485  if (Opts.IncludeCodePatterns)
486    Res.push_back("-code-completion-patterns");
487  if (!Opts.IncludeGlobals)
488    Res.push_back("-no-code-completion-globals");
489  if (Opts.IncludeBriefComments)
490    Res.push_back("-code-completion-brief-comments");
491}
492
493static void FrontendOptsToArgs(const FrontendOptions &Opts, ToArgsList &Res) {
494  if (Opts.DisableFree)
495    Res.push_back("-disable-free");
496  if (Opts.RelocatablePCH)
497    Res.push_back("-relocatable-pch");
498  if (Opts.ShowHelp)
499    Res.push_back("-help");
500  if (Opts.ShowStats)
501    Res.push_back("-print-stats");
502  if (Opts.ShowTimers)
503    Res.push_back("-ftime-report");
504  if (Opts.ShowVersion)
505    Res.push_back("-version");
506  if (Opts.FixWhatYouCan)
507    Res.push_back("-fix-what-you-can");
508  if (Opts.FixOnlyWarnings)
509    Res.push_back("-fix-only-warnings");
510  if (Opts.FixAndRecompile)
511    Res.push_back("-fixit-recompile");
512  if (Opts.FixToTemporaries)
513    Res.push_back("-fixit-to-temporary");
514  switch (Opts.ARCMTAction) {
515  case FrontendOptions::ARCMT_None:
516    break;
517  case FrontendOptions::ARCMT_Check:
518    Res.push_back("-arcmt-check");
519    break;
520  case FrontendOptions::ARCMT_Modify:
521    Res.push_back("-arcmt-modify");
522    break;
523  case FrontendOptions::ARCMT_Migrate:
524    Res.push_back("-arcmt-migrate");
525    break;
526  }
527  CodeCompleteOptionsToArgs(Opts.CodeCompleteOpts, Res);
528  if (!Opts.MTMigrateDir.empty())
529    Res.push_back("-mt-migrate-directory", Opts.MTMigrateDir);
530  if (!Opts.ARCMTMigrateReportOut.empty())
531    Res.push_back("-arcmt-migrate-report-output", Opts.ARCMTMigrateReportOut);
532  if (Opts.ARCMTMigrateEmitARCErrors)
533    Res.push_back("-arcmt-migrate-emit-errors");
534
535  if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals)
536    Res.push_back("-objcmt-migrate-literals");
537  if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting)
538    Res.push_back("-objcmt-migrate-subscripting");
539
540  bool NeedLang = false;
541  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
542    if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
543        Opts.Inputs[i].Kind)
544      NeedLang = true;
545  if (NeedLang)
546    Res.push_back("-x", getInputKindName(Opts.Inputs[0].Kind));
547  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
548    assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
549           "Unable to represent this input vector!");
550    Res.push_back(Opts.Inputs[i].File);
551  }
552
553  if (!Opts.OutputFile.empty())
554    Res.push_back("-o", Opts.OutputFile);
555  if (!Opts.CodeCompletionAt.FileName.empty())
556    Res.push_back("-code-completion-at",
557                  Opts.CodeCompletionAt.FileName + ":" +
558                  llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
559                  llvm::utostr(Opts.CodeCompletionAt.Column));
560  if (Opts.ProgramAction != frontend::PluginAction)
561    Res.push_back(getActionName(Opts.ProgramAction));
562  if (!Opts.ActionName.empty()) {
563    Res.push_back("-plugin", Opts.ActionName);
564    for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i)
565      Res.push_back("-plugin-arg-" + Opts.ActionName, Opts.PluginArgs[i]);
566  }
567  if (!Opts.ASTDumpFilter.empty())
568    Res.push_back("-ast-dump-filter", Opts.ASTDumpFilter);
569  for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i)
570    Res.push_back("-load", Opts.Plugins[i]);
571  for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
572    Res.push_back("-add-plugin", Opts.AddPluginActions[i]);
573    for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai)
574      Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i],
575                    Opts.AddPluginArgs[i][ai]);
576  }
577  for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i)
578    Res.push_back("-ast-merge", Opts.ASTMergeFiles[i]);
579  for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i)
580    Res.push_back("-mllvm", Opts.LLVMArgs[i]);
581  if (!Opts.OverrideRecordLayoutsFile.empty())
582    Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
583}
584
585static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
586                                   ToArgsList &Res) {
587  if (Opts.Sysroot != "/") {
588    Res.push_back("-isysroot");
589    Res.push_back(Opts.Sysroot);
590  }
591
592  /// User specified include entries.
593  for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
594    const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
595    if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
596      llvm::report_fatal_error("Invalid option set!");
597    if (E.IsUserSupplied) {
598      switch (E.Group) {
599      case frontend::After:
600        Res.push_back("-idirafter");
601        break;
602
603      case frontend::Quoted:
604        Res.push_back("-iquote");
605        break;
606
607      case frontend::System:
608        Res.push_back("-isystem");
609        break;
610
611      case frontend::IndexHeaderMap:
612        Res.push_back("-index-header-map");
613        Res.push_back(E.IsFramework? "-F" : "-I");
614        break;
615
616      case frontend::CSystem:
617        Res.push_back("-c-isystem");
618        break;
619
620      case frontend::CXXSystem:
621        Res.push_back("-cxx-isystem");
622        break;
623
624      case frontend::ObjCSystem:
625        Res.push_back("-objc-isystem");
626        break;
627
628      case frontend::ObjCXXSystem:
629        Res.push_back("-objcxx-isystem");
630        break;
631
632      case frontend::Angled:
633        Res.push_back(E.IsFramework ? "-F" : "-I");
634        break;
635      }
636    } else {
637      if (E.IsInternal) {
638        assert(E.Group == frontend::System && "Unexpected header search group");
639        if (E.ImplicitExternC)
640          Res.push_back("-internal-externc-isystem");
641        else
642          Res.push_back("-internal-isystem");
643      } else {
644        if (E.Group != frontend::Angled && E.Group != frontend::System)
645          llvm::report_fatal_error("Invalid option set!");
646        Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
647                      "-iwithprefix");
648      }
649    }
650    Res.push_back(E.Path);
651  }
652
653  /// User-specified system header prefixes.
654  for (unsigned i = 0, e = Opts.SystemHeaderPrefixes.size(); i != e; ++i) {
655    if (Opts.SystemHeaderPrefixes[i].IsSystemHeader)
656      Res.push_back("-isystem-prefix");
657    else
658      Res.push_back("-ino-system-prefix");
659
660    Res.push_back(Opts.SystemHeaderPrefixes[i].Prefix);
661  }
662
663  if (!Opts.ResourceDir.empty())
664    Res.push_back("-resource-dir", Opts.ResourceDir);
665  if (!Opts.ModuleCachePath.empty())
666    Res.push_back("-fmodule-cache-path", Opts.ModuleCachePath);
667  if (!Opts.UseStandardSystemIncludes)
668    Res.push_back("-nostdsysteminc");
669  if (!Opts.UseStandardCXXIncludes)
670    Res.push_back("-nostdinc++");
671  if (Opts.UseLibcxx)
672    Res.push_back("-stdlib=libc++");
673  if (Opts.Verbose)
674    Res.push_back("-v");
675}
676
677static void LangOptsToArgs(const LangOptions &Opts, ToArgsList &Res) {
678  LangOptions DefaultLangOpts;
679
680  // FIXME: Need to set -std to get all the implicit options.
681
682  // FIXME: We want to only pass options relative to the defaults, which
683  // requires constructing a target. :(
684  //
685  // It would be better to push the all target specific choices into the driver,
686  // so that everything below that was more uniform.
687
688  if (Opts.Trigraphs)
689    Res.push_back("-trigraphs");
690  // Implicit based on the input kind:
691  //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
692  // Implicit based on the input language standard:
693  //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
694  if (Opts.DollarIdents)
695    Res.push_back("-fdollars-in-identifiers");
696  if (Opts.GNUMode && !Opts.GNUKeywords)
697    Res.push_back("-fno-gnu-keywords");
698  if (!Opts.GNUMode && Opts.GNUKeywords)
699    Res.push_back("-fgnu-keywords");
700  if (Opts.MicrosoftExt)
701    Res.push_back("-fms-extensions");
702  if (Opts.MicrosoftMode)
703    Res.push_back("-fms-compatibility");
704  if (Opts.MSCVersion != 0)
705    Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
706  if (Opts.Borland)
707    Res.push_back("-fborland-extensions");
708  if (Opts.ObjCDefaultSynthProperties)
709    Res.push_back("-fobjc-default-synthesize-properties");
710  // NoInline is implicit.
711  if (!Opts.CXXOperatorNames)
712    Res.push_back("-fno-operator-names");
713  if (Opts.PascalStrings)
714    Res.push_back("-fpascal-strings");
715  if (Opts.CatchUndefined)
716    Res.push_back("-fcatch-undefined-behavior");
717  if (Opts.AddressSanitizer)
718    Res.push_back("-faddress-sanitizer");
719  if (Opts.ThreadSanitizer)
720    Res.push_back("-fthread-sanitizer");
721  if (Opts.WritableStrings)
722    Res.push_back("-fwritable-strings");
723  if (Opts.ConstStrings)
724    Res.push_back("-fconst-strings");
725  if (!Opts.LaxVectorConversions)
726    Res.push_back("-fno-lax-vector-conversions");
727  if (Opts.AltiVec)
728    Res.push_back("-faltivec");
729  if (Opts.Exceptions)
730    Res.push_back("-fexceptions");
731  if (Opts.ObjCExceptions)
732    Res.push_back("-fobjc-exceptions");
733  if (Opts.CXXExceptions)
734    Res.push_back("-fcxx-exceptions");
735  if (Opts.SjLjExceptions)
736    Res.push_back("-fsjlj-exceptions");
737  if (Opts.TraditionalCPP)
738    Res.push_back("-traditional-cpp");
739  if (!Opts.RTTI)
740    Res.push_back("-fno-rtti");
741  if (Opts.MSBitfields)
742    Res.push_back("-mms-bitfields");
743  if (Opts.Freestanding)
744    Res.push_back("-ffreestanding");
745  if (Opts.NoBuiltin)
746    Res.push_back("-fno-builtin");
747  if (!Opts.AssumeSaneOperatorNew)
748    Res.push_back("-fno-assume-sane-operator-new");
749  if (!Opts.ThreadsafeStatics)
750    Res.push_back("-fno-threadsafe-statics");
751  if (Opts.POSIXThreads)
752    Res.push_back("-pthread");
753  if (Opts.Blocks)
754    Res.push_back("-fblocks");
755  if (Opts.BlocksRuntimeOptional)
756    Res.push_back("-fblocks-runtime-optional");
757  if (Opts.Modules)
758    Res.push_back("-fmodules");
759  if (Opts.EmitAllDecls)
760    Res.push_back("-femit-all-decls");
761  if (Opts.MathErrno)
762    Res.push_back("-fmath-errno");
763  switch (Opts.getSignedOverflowBehavior()) {
764  case LangOptions::SOB_Undefined: break;
765  case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
766  case LangOptions::SOB_Trapping:
767    Res.push_back("-ftrapv");
768    if (!Opts.OverflowHandler.empty())
769      Res.push_back("-ftrapv-handler", Opts.OverflowHandler);
770    break;
771  }
772  switch (Opts.getFPContractMode()) {
773  case LangOptions::FPC_Off:  Res.push_back("-ffp-contract=off"); break;
774  case LangOptions::FPC_On:   Res.push_back("-ffp-contract=on"); break;
775  case LangOptions::FPC_Fast: Res.push_back("-ffp-contract=fast"); break;
776  }
777  if (Opts.HeinousExtensions)
778    Res.push_back("-fheinous-gnu-extensions");
779  // Optimize is implicit.
780  // OptimizeSize is implicit.
781  if (Opts.FastMath)
782    Res.push_back("-ffast-math");
783  if (Opts.Static)
784    Res.push_back("-static-define");
785  if (Opts.DumpRecordLayoutsSimple)
786    Res.push_back("-fdump-record-layouts-simple");
787  else if (Opts.DumpRecordLayouts)
788    Res.push_back("-fdump-record-layouts");
789  if (Opts.DumpVTableLayouts)
790    Res.push_back("-fdump-vtable-layouts");
791  if (Opts.NoBitFieldTypeAlign)
792    Res.push_back("-fno-bitfield-type-alignment");
793  if (Opts.PICLevel)
794    Res.push_back("-pic-level", llvm::utostr(Opts.PICLevel));
795  if (Opts.PIELevel)
796    Res.push_back("-pie-level", llvm::utostr(Opts.PIELevel));
797  if (Opts.ObjCGCBitmapPrint)
798    Res.push_back("-print-ivar-layout");
799  if (Opts.NoConstantCFStrings)
800    Res.push_back("-fno-constant-cfstrings");
801  if (!Opts.AccessControl)
802    Res.push_back("-fno-access-control");
803  if (!Opts.CharIsSigned)
804    Res.push_back("-fno-signed-char");
805  if (Opts.CPlusPlus && !Opts.WChar)
806    Res.push_back("-fno-wchar");
807  if (Opts.ShortWChar)
808    Res.push_back("-fshort-wchar");
809  if (!Opts.ElideConstructors)
810    Res.push_back("-fno-elide-constructors");
811  if (Opts.getGC() != LangOptions::NonGC) {
812    if (Opts.getGC() == LangOptions::HybridGC) {
813      Res.push_back("-fobjc-gc");
814    } else {
815      assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
816      Res.push_back("-fobjc-gc-only");
817    }
818  }
819  Res.push_back("-fobjc-runtime=" + Opts.ObjCRuntime.getAsString());
820  if (Opts.ObjCAutoRefCount)
821    Res.push_back("-fobjc-arc");
822  if (Opts.ObjCARCWeak)
823    Res.push_back("-fobjc-runtime-has-weak");
824  if (!Opts.ObjCInferRelatedResultType)
825    Res.push_back("-fno-objc-infer-related-result-type");
826
827  if (Opts.AppleKext)
828    Res.push_back("-fapple-kext");
829
830  if (Opts.getVisibilityMode() != DefaultVisibility) {
831    Res.push_back("-fvisibility");
832    if (Opts.getVisibilityMode() == HiddenVisibility) {
833      Res.push_back("hidden");
834    } else {
835      assert(Opts.getVisibilityMode() == ProtectedVisibility &&
836             "Invalid visibility!");
837      Res.push_back("protected");
838    }
839  }
840  if (Opts.InlineVisibilityHidden)
841    Res.push_back("-fvisibility-inlines-hidden");
842
843  if (Opts.getStackProtector() != 0)
844    Res.push_back("-stack-protector", llvm::utostr(Opts.getStackProtector()));
845  if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth)
846    Res.push_back("-ftemplate-depth", llvm::utostr(Opts.InstantiationDepth));
847  if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth)
848    Res.push_back("-fconstexpr-depth", llvm::utostr(Opts.ConstexprCallDepth));
849  if (!Opts.ObjCConstantStringClass.empty())
850    Res.push_back("-fconstant-string-class", Opts.ObjCConstantStringClass);
851  if (Opts.FakeAddressSpaceMap)
852    Res.push_back("-ffake-address-space-map");
853  if (Opts.ParseUnknownAnytype)
854    Res.push_back("-funknown-anytype");
855  if (Opts.DebuggerSupport)
856    Res.push_back("-fdebugger-support");
857  if (Opts.DebuggerCastResultToId)
858    Res.push_back("-fdebugger-cast-result-to-id");
859  if (Opts.DebuggerObjCLiteral)
860    Res.push_back("-fdebugger-objc-literal");
861  if (Opts.DelayedTemplateParsing)
862    Res.push_back("-fdelayed-template-parsing");
863  if (Opts.Deprecated)
864    Res.push_back("-fdeprecated-macro");
865  if (Opts.ApplePragmaPack)
866    Res.push_back("-fapple-pragma-pack");
867  if (!Opts.CurrentModule.empty())
868    Res.push_back("-fmodule-name=" + Opts.CurrentModule);
869}
870
871static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
872                                   ToArgsList &Res) {
873  for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
874    Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
875                  Opts.Macros[i].first);
876  for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
877    // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
878    Res.push_back("-include", Opts.Includes[i]);
879  }
880  for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i)
881    Res.push_back("-imacros", Opts.MacroIncludes[i]);
882  if (!Opts.UsePredefines)
883    Res.push_back("-undef");
884  if (Opts.DetailedRecord)
885    Res.push_back("-detailed-preprocessing-record");
886  if (!Opts.ImplicitPCHInclude.empty())
887    Res.push_back("-include-pch", Opts.ImplicitPCHInclude);
888  if (!Opts.ImplicitPTHInclude.empty())
889    Res.push_back("-include-pth", Opts.ImplicitPTHInclude);
890  if (!Opts.TokenCache.empty()) {
891    if (Opts.ImplicitPTHInclude.empty())
892      Res.push_back("-token-cache", Opts.TokenCache);
893    else
894      assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
895             "Unsupported option combination!");
896  }
897  for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i)
898    Res.push_back("-chain-include", Opts.ChainedIncludes[i]);
899  for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
900    Res.push_back("-remap-file", Opts.RemappedFiles[i].first + ";" +
901                                 Opts.RemappedFiles[i].second);
902  }
903}
904
905static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
906                                         ToArgsList &Res) {
907  if (!Opts.ShowCPP && !Opts.ShowMacros)
908    llvm::report_fatal_error("Invalid option combination!");
909
910  if (Opts.ShowCPP && Opts.ShowMacros)
911    Res.push_back("-dD");
912  else if (!Opts.ShowCPP && Opts.ShowMacros)
913    Res.push_back("-dM");
914
915  if (!Opts.ShowLineMarkers)
916    Res.push_back("-P");
917  if (Opts.ShowComments)
918    Res.push_back("-C");
919  if (Opts.ShowMacroComments)
920    Res.push_back("-CC");
921}
922
923static void TargetOptsToArgs(const TargetOptions &Opts,
924                             ToArgsList &Res) {
925  Res.push_back("-triple");
926  Res.push_back(Opts.Triple);
927  if (!Opts.CPU.empty())
928    Res.push_back("-target-cpu", Opts.CPU);
929  if (!Opts.ABI.empty())
930    Res.push_back("-target-abi", Opts.ABI);
931  if (!Opts.LinkerVersion.empty())
932    Res.push_back("-target-linker-version", Opts.LinkerVersion);
933  if (!Opts.CXXABI.empty())
934    Res.push_back("-cxx-abi", Opts.CXXABI);
935  for (unsigned i = 0, e = Opts.FeaturesAsWritten.size(); i != e; ++i)
936    Res.push_back("-target-feature", Opts.FeaturesAsWritten[i]);
937}
938
939void CompilerInvocation::toArgs(std::vector<std::string> &Res) const {
940  ToArgsList List(Res);
941  AnalyzerOptsToArgs(*getAnalyzerOpts(), List);
942  CodeGenOptsToArgs(getCodeGenOpts(), List);
943  DependencyOutputOptsToArgs(getDependencyOutputOpts(), List);
944  DiagnosticOptsToArgs(getDiagnosticOpts(), List);
945  FileSystemOptsToArgs(getFileSystemOpts(), List);
946  FrontendOptsToArgs(getFrontendOpts(), List);
947  HeaderSearchOptsToArgs(getHeaderSearchOpts(), List);
948  LangOptsToArgs(*getLangOpts(), List);
949  PreprocessorOptsToArgs(getPreprocessorOpts(), List);
950  PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), List);
951  TargetOptsToArgs(getTargetOpts(), List);
952}
953
954//===----------------------------------------------------------------------===//
955// Deserialization (to args)
956//===----------------------------------------------------------------------===//
957
958using namespace clang::driver;
959using namespace clang::driver::options;
960
961//
962
963static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
964                                     DiagnosticsEngine &Diags) {
965  unsigned DefaultOpt = 0;
966  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
967    DefaultOpt = 2;
968
969  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
970    if (A->getOption().matches(options::OPT_O0))
971      return 0;
972
973    assert (A->getOption().matches(options::OPT_O));
974
975    llvm::StringRef S(A->getValue(Args));
976    if (S == "s" || S == "z" || S.empty())
977      return 2;
978
979    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
980  }
981
982  return DefaultOpt;
983}
984
985static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
986                                         DiagnosticsEngine &Diags) {
987  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
988    if (A->getOption().matches(options::OPT_O)) {
989      switch (A->getValue(Args)[0]) {
990      default:
991        return 0;
992      case 's':
993        return 1;
994      case 'z':
995        return 2;
996      }
997    }
998  }
999  return 0;
1000}
1001
1002static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
1003  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
1004         E = Args.filtered_end(); I != E; ++I) {
1005    Arg *A = *I;
1006    // If the argument is a pure flag, add its name (minus the "W" at the beginning)
1007    // to the warning list. Else, add its value (for the OPT_W case).
1008    if (A->getOption().getKind() == Option::FlagClass) {
1009      Warnings.push_back(A->getOption().getName().substr(1));
1010    } else {
1011      for (unsigned Idx = 0, End = A->getNumValues();
1012           Idx < End; ++Idx) {
1013        StringRef V = A->getValue(Args, Idx);
1014        // "-Wl," and such are not warning options.
1015        // FIXME: Should be handled by putting these in separate flags.
1016        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
1017          continue;
1018
1019        Warnings.push_back(V);
1020      }
1021    }
1022  }
1023}
1024
1025static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
1026                              DiagnosticsEngine &Diags) {
1027  using namespace options;
1028  bool Success = true;
1029  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
1030    StringRef Name = A->getValue(Args);
1031    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
1032#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
1033      .Case(CMDFLAG, NAME##Model)
1034#include "clang/StaticAnalyzer/Core/Analyses.def"
1035      .Default(NumStores);
1036    if (Value == NumStores) {
1037      Diags.Report(diag::err_drv_invalid_value)
1038        << A->getAsString(Args) << Name;
1039      Success = false;
1040    } else {
1041      Opts.AnalysisStoreOpt = Value;
1042    }
1043  }
1044
1045  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
1046    StringRef Name = A->getValue(Args);
1047    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
1048#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
1049      .Case(CMDFLAG, NAME##Model)
1050#include "clang/StaticAnalyzer/Core/Analyses.def"
1051      .Default(NumConstraints);
1052    if (Value == NumConstraints) {
1053      Diags.Report(diag::err_drv_invalid_value)
1054        << A->getAsString(Args) << Name;
1055      Success = false;
1056    } else {
1057      Opts.AnalysisConstraintsOpt = Value;
1058    }
1059  }
1060
1061  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1062    StringRef Name = A->getValue(Args);
1063    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1064#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1065      .Case(CMDFLAG, PD_##NAME)
1066#include "clang/StaticAnalyzer/Core/Analyses.def"
1067      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1068    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1069      Diags.Report(diag::err_drv_invalid_value)
1070        << A->getAsString(Args) << Name;
1071      Success = false;
1072    } else {
1073      Opts.AnalysisDiagOpt = Value;
1074    }
1075  }
1076
1077  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1078    StringRef Name = A->getValue(Args);
1079    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1080#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1081      .Case(CMDFLAG, NAME)
1082#include "clang/StaticAnalyzer/Core/Analyses.def"
1083      .Default(NumPurgeModes);
1084    if (Value == NumPurgeModes) {
1085      Diags.Report(diag::err_drv_invalid_value)
1086        << A->getAsString(Args) << Name;
1087      Success = false;
1088    } else {
1089      Opts.AnalysisPurgeOpt = Value;
1090    }
1091  }
1092
1093  if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
1094    StringRef Name = A->getValue(Args);
1095    AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
1096#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
1097      .Case(CMDFLAG, NAME)
1098#include "clang/StaticAnalyzer/Core/Analyses.def"
1099      .Default(NumIPAModes);
1100    if (Value == NumIPAModes) {
1101      Diags.Report(diag::err_drv_invalid_value)
1102        << A->getAsString(Args) << Name;
1103      Success = false;
1104    } else {
1105      Opts.IPAMode = Value;
1106    }
1107  }
1108
1109  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
1110    StringRef Name = A->getValue(Args);
1111    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
1112#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
1113      .Case(CMDFLAG, NAME)
1114#include "clang/StaticAnalyzer/Core/Analyses.def"
1115      .Default(NumInliningModes);
1116    if (Value == NumInliningModes) {
1117      Diags.Report(diag::err_drv_invalid_value)
1118        << A->getAsString(Args) << Name;
1119      Success = false;
1120    } else {
1121      Opts.InliningMode = Value;
1122    }
1123  }
1124
1125  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1126  Opts.visualizeExplodedGraphWithGraphViz =
1127    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1128  Opts.visualizeExplodedGraphWithUbiGraph =
1129    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1130  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
1131  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1132  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1133  Opts.AnalyzeNestedBlocks =
1134    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1135  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
1136  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1137  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1138  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1139  Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1140  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1141  Opts.eagerlyTrimExplodedGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1142  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1143  Opts.InlineMaxStackDepth =
1144    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1145                            Opts.InlineMaxStackDepth, Diags);
1146  Opts.InlineMaxFunctionSize =
1147    Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1148                            Opts.InlineMaxFunctionSize, Diags);
1149
1150  Opts.CheckersControlList.clear();
1151  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1152                                             OPT_analyzer_disable_checker),
1153         ie = Args.filtered_end(); it != ie; ++it) {
1154    const Arg *A = *it;
1155    A->claim();
1156    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1157    // We can have a list of comma separated checker names, e.g:
1158    // '-analyzer-checker=cocoa,unix'
1159    StringRef checkerList = A->getValue(Args);
1160    SmallVector<StringRef, 4> checkers;
1161    checkerList.split(checkers, ",");
1162    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1163      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1164  }
1165
1166  // Go through the analyzer configuration options.
1167  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
1168       ie = Args.filtered_end(); it != ie; ++it) {
1169    const Arg *A = *it;
1170    A->claim();
1171    // We can have a list of comma separated config names, e.g:
1172    // '-analyzer-config key1=val1,key2=val2'
1173    StringRef configList = A->getValue(Args);
1174    SmallVector<StringRef, 4> configVals;
1175    configList.split(configVals, ",");
1176    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
1177      StringRef key, val;
1178      llvm::tie(key, val) = configVals[i].split("=");
1179      if (val.empty()) {
1180        Diags.Report(SourceLocation(),
1181                     diag::err_analyzer_config_no_value) << configVals[i];
1182        Success = false;
1183        break;
1184      }
1185      if (val.find('=') != StringRef::npos) {
1186        Diags.Report(SourceLocation(),
1187                     diag::err_analyzer_config_multiple_values)
1188          << configVals[i];
1189        Success = false;
1190        break;
1191      }
1192      Opts.Config[key] = val;
1193    }
1194  }
1195
1196  return Success;
1197}
1198
1199static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1200  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1201  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1202  return true;
1203}
1204
1205static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1206                             DiagnosticsEngine &Diags) {
1207  using namespace options;
1208  bool Success = true;
1209
1210  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1211  if (OptLevel > 3) {
1212    Diags.Report(diag::err_drv_invalid_value)
1213      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1214    OptLevel = 3;
1215    Success = false;
1216  }
1217  Opts.OptimizationLevel = OptLevel;
1218
1219  // We must always run at least the always inlining pass.
1220  Opts.setInlining(
1221    (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1222                                 : CodeGenOptions::OnlyAlwaysInlining);
1223  // -fno-inline-functions overrides OptimizationLevel > 1.
1224  Opts.NoInline = Args.hasArg(OPT_fno_inline);
1225  Opts.setInlining(Args.hasArg(OPT_fno_inline_functions) ?
1226                     CodeGenOptions::OnlyAlwaysInlining : Opts.getInlining());
1227
1228  if (Args.hasArg(OPT_gline_tables_only)) {
1229    Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
1230  } else if (Args.hasArg(OPT_g_Flag)) {
1231    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
1232      Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
1233    else
1234      Opts.setDebugInfo(CodeGenOptions::FullDebugInfo);
1235  }
1236  Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
1237
1238  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1239  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1240  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1241  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1242    OPT_fuse_register_sized_bitfield_access);
1243  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1244  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1245  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1246  Opts.NoCommon = Args.hasArg(OPT_fno_common);
1247  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1248  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
1249  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1250                            Args.hasArg(OPT_ffreestanding));
1251  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1252                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1253
1254  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1255  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1256  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1257  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1258  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1259  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1260  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1261  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1262  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1263  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1264  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1265  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1266  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1267  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1268                       Args.hasArg(OPT_cl_finite_math_only)||
1269                       Args.hasArg(OPT_cl_fast_relaxed_math));
1270  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1271                       Args.hasArg(OPT_cl_finite_math_only)||
1272                       Args.hasArg(OPT_cl_fast_relaxed_math));
1273  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1274  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1275  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1276  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1277  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1278  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1279  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1280  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1281  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1282  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1283  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1284  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
1285  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1286                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1287                      Args.hasArg(OPT_cl_fast_relaxed_math);
1288  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1289  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1290  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1291  Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
1292                                                Diags);
1293  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
1294
1295  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1296  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1297
1298  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1299  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1300
1301  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1302  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1303  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1304  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1305  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
1306  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1307  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1308  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1309  Opts.SSPBufferSize =
1310    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
1311  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1312  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1313    StringRef Val = A->getValue(Args);
1314    unsigned StackAlignment = Opts.StackAlignment;
1315    Val.getAsInteger(10, StackAlignment);
1316    Opts.StackAlignment = StackAlignment;
1317  }
1318
1319  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1320    StringRef Name = A->getValue(Args);
1321    unsigned Method = llvm::StringSwitch<unsigned>(Name)
1322      .Case("legacy", CodeGenOptions::Legacy)
1323      .Case("non-legacy", CodeGenOptions::NonLegacy)
1324      .Case("mixed", CodeGenOptions::Mixed)
1325      .Default(~0U);
1326    if (Method == ~0U) {
1327      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1328      Success = false;
1329    } else {
1330      Opts.setObjCDispatchMethod(
1331        static_cast<CodeGenOptions::ObjCDispatchMethodKind>(Method));
1332    }
1333  }
1334
1335  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1336    StringRef Name = A->getValue(Args);
1337    unsigned Model = llvm::StringSwitch<unsigned>(Name)
1338        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1339        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1340        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1341        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1342        .Default(~0U);
1343    if (Model == ~0U) {
1344      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1345      Success = false;
1346    } else {
1347      Opts.setDefaultTLSModel(static_cast<CodeGenOptions::TLSModel>(Model));
1348    }
1349  }
1350
1351  return Success;
1352}
1353
1354static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1355                                      ArgList &Args) {
1356  using namespace options;
1357  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1358  Opts.Targets = Args.getAllArgValues(OPT_MT);
1359  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1360  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1361  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1362  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1363  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1364  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1365}
1366
1367bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1368                                DiagnosticsEngine *Diags) {
1369  using namespace options;
1370  bool Success = true;
1371
1372  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1373  Opts.DiagnosticSerializationFile =
1374    Args.getLastArgValue(OPT_diagnostic_serialized_file);
1375  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1376  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1377  Opts.Pedantic = Args.hasArg(OPT_pedantic);
1378  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1379  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1380  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1381  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1382                                 OPT_fno_show_column,
1383                                 /*Default=*/true);
1384  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1385  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1386  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1387
1388  // Default behavior is to not to show note include stacks.
1389  Opts.ShowNoteIncludeStack = false;
1390  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1391                               OPT_fno_diagnostics_show_note_include_stack))
1392    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1393      Opts.ShowNoteIncludeStack = true;
1394
1395  StringRef ShowOverloads =
1396    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1397  if (ShowOverloads == "best")
1398    Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1399  else if (ShowOverloads == "all")
1400    Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1401  else {
1402    Success = false;
1403    if (Diags)
1404      Diags->Report(diag::err_drv_invalid_value)
1405      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1406      << ShowOverloads;
1407  }
1408
1409  StringRef ShowCategory =
1410    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1411  if (ShowCategory == "none")
1412    Opts.ShowCategories = 0;
1413  else if (ShowCategory == "id")
1414    Opts.ShowCategories = 1;
1415  else if (ShowCategory == "name")
1416    Opts.ShowCategories = 2;
1417  else {
1418    Success = false;
1419    if (Diags)
1420      Diags->Report(diag::err_drv_invalid_value)
1421      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1422      << ShowCategory;
1423  }
1424
1425  StringRef Format =
1426    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1427  if (Format == "clang")
1428    Opts.Format = DiagnosticOptions::Clang;
1429  else if (Format == "msvc")
1430    Opts.Format = DiagnosticOptions::Msvc;
1431  else if (Format == "vi")
1432    Opts.Format = DiagnosticOptions::Vi;
1433  else {
1434    Success = false;
1435    if (Diags)
1436      Diags->Report(diag::err_drv_invalid_value)
1437      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1438      << Format;
1439  }
1440
1441  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1442  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1443  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1444  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1445  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1446  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1447  Opts.MacroBacktraceLimit
1448    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1449                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1450  Opts.TemplateBacktraceLimit
1451    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1452                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
1453                         Diags);
1454  Opts.ConstexprBacktraceLimit
1455    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1456                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
1457                         Diags);
1458  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1459                                    DiagnosticOptions::DefaultTabStop, Diags);
1460  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1461    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1462    if (Diags)
1463      Diags->Report(diag::warn_ignoring_ftabstop_value)
1464      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1465  }
1466  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1467  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1468  addWarningArgs(Args, Opts.Warnings);
1469
1470  return Success;
1471}
1472
1473static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1474  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1475}
1476
1477static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1478                                   DiagnosticsEngine &Diags) {
1479  using namespace options;
1480  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1481  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1482    switch (A->getOption().getID()) {
1483    default:
1484      llvm_unreachable("Invalid option in group!");
1485    case OPT_ast_list:
1486      Opts.ProgramAction = frontend::ASTDeclList; break;
1487    case OPT_ast_dump:
1488      Opts.ProgramAction = frontend::ASTDump; break;
1489    case OPT_ast_dump_xml:
1490      Opts.ProgramAction = frontend::ASTDumpXML; break;
1491    case OPT_ast_print:
1492      Opts.ProgramAction = frontend::ASTPrint; break;
1493    case OPT_ast_view:
1494      Opts.ProgramAction = frontend::ASTView; break;
1495    case OPT_dump_raw_tokens:
1496      Opts.ProgramAction = frontend::DumpRawTokens; break;
1497    case OPT_dump_tokens:
1498      Opts.ProgramAction = frontend::DumpTokens; break;
1499    case OPT_S:
1500      Opts.ProgramAction = frontend::EmitAssembly; break;
1501    case OPT_emit_llvm_bc:
1502      Opts.ProgramAction = frontend::EmitBC; break;
1503    case OPT_emit_html:
1504      Opts.ProgramAction = frontend::EmitHTML; break;
1505    case OPT_emit_llvm:
1506      Opts.ProgramAction = frontend::EmitLLVM; break;
1507    case OPT_emit_llvm_only:
1508      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1509    case OPT_emit_codegen_only:
1510      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1511    case OPT_emit_obj:
1512      Opts.ProgramAction = frontend::EmitObj; break;
1513    case OPT_fixit_EQ:
1514      Opts.FixItSuffix = A->getValue(Args);
1515      // fall-through!
1516    case OPT_fixit:
1517      Opts.ProgramAction = frontend::FixIt; break;
1518    case OPT_emit_module:
1519      Opts.ProgramAction = frontend::GenerateModule; break;
1520    case OPT_emit_pch:
1521      Opts.ProgramAction = frontend::GeneratePCH; break;
1522    case OPT_emit_pth:
1523      Opts.ProgramAction = frontend::GeneratePTH; break;
1524    case OPT_init_only:
1525      Opts.ProgramAction = frontend::InitOnly; break;
1526    case OPT_fsyntax_only:
1527      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1528    case OPT_print_decl_contexts:
1529      Opts.ProgramAction = frontend::PrintDeclContext; break;
1530    case OPT_print_preamble:
1531      Opts.ProgramAction = frontend::PrintPreamble; break;
1532    case OPT_E:
1533      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1534    case OPT_rewrite_macros:
1535      Opts.ProgramAction = frontend::RewriteMacros; break;
1536    case OPT_rewrite_objc:
1537      Opts.ProgramAction = frontend::RewriteObjC; break;
1538    case OPT_rewrite_test:
1539      Opts.ProgramAction = frontend::RewriteTest; break;
1540    case OPT_analyze:
1541      Opts.ProgramAction = frontend::RunAnalysis; break;
1542    case OPT_migrate:
1543      Opts.ProgramAction = frontend::MigrateSource; break;
1544    case OPT_Eonly:
1545      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1546    }
1547  }
1548
1549  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1550    Opts.Plugins.push_back(A->getValue(Args,0));
1551    Opts.ProgramAction = frontend::PluginAction;
1552    Opts.ActionName = A->getValue(Args);
1553
1554    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1555           end = Args.filtered_end(); it != end; ++it) {
1556      if ((*it)->getValue(Args, 0) == Opts.ActionName)
1557        Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1558    }
1559  }
1560
1561  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1562  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1563  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1564    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1565           end = Args.filtered_end(); it != end; ++it) {
1566      if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1567        Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1568    }
1569  }
1570
1571  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1572    Opts.CodeCompletionAt =
1573      ParsedSourceLocation::FromString(A->getValue(Args));
1574    if (Opts.CodeCompletionAt.FileName.empty())
1575      Diags.Report(diag::err_drv_invalid_value)
1576        << A->getAsString(Args) << A->getValue(Args);
1577  }
1578  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1579
1580  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1581  Opts.Plugins = Args.getAllArgValues(OPT_load);
1582  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1583  Opts.ShowHelp = Args.hasArg(OPT_help);
1584  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1585  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1586  Opts.ShowVersion = Args.hasArg(OPT_version);
1587  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1588  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1589  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1590  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1591  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1592  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1593  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1594
1595  Opts.CodeCompleteOpts.IncludeMacros
1596    = Args.hasArg(OPT_code_completion_macros);
1597  Opts.CodeCompleteOpts.IncludeCodePatterns
1598    = Args.hasArg(OPT_code_completion_patterns);
1599  Opts.CodeCompleteOpts.IncludeGlobals
1600    = !Args.hasArg(OPT_no_code_completion_globals);
1601  Opts.CodeCompleteOpts.IncludeBriefComments
1602    = Args.hasArg(OPT_code_completion_brief_comments);
1603
1604  Opts.OverrideRecordLayoutsFile
1605    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1606  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1607                                     OPT_arcmt_modify,
1608                                     OPT_arcmt_migrate)) {
1609    switch (A->getOption().getID()) {
1610    default:
1611      llvm_unreachable("missed a case");
1612    case OPT_arcmt_check:
1613      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1614      break;
1615    case OPT_arcmt_modify:
1616      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1617      break;
1618    case OPT_arcmt_migrate:
1619      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1620      break;
1621    }
1622  }
1623  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1624  Opts.ARCMTMigrateReportOut
1625    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1626  Opts.ARCMTMigrateEmitARCErrors
1627    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1628
1629  if (Args.hasArg(OPT_objcmt_migrate_literals))
1630    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1631  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1632    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1633
1634  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1635      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1636    Diags.Report(diag::err_drv_argument_not_allowed_with)
1637      << "ARC migration" << "ObjC migration";
1638  }
1639
1640  InputKind DashX = IK_None;
1641  if (const Arg *A = Args.getLastArg(OPT_x)) {
1642    DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1643      .Case("c", IK_C)
1644      .Case("cl", IK_OpenCL)
1645      .Case("cuda", IK_CUDA)
1646      .Case("c++", IK_CXX)
1647      .Case("objective-c", IK_ObjC)
1648      .Case("objective-c++", IK_ObjCXX)
1649      .Case("cpp-output", IK_PreprocessedC)
1650      .Case("assembler-with-cpp", IK_Asm)
1651      .Case("c++-cpp-output", IK_PreprocessedCXX)
1652      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1653      .Case("objc-cpp-output", IK_PreprocessedObjC)
1654      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1655      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1656      .Case("c-header", IK_C)
1657      .Case("cl-header", IK_OpenCL)
1658      .Case("objective-c-header", IK_ObjC)
1659      .Case("c++-header", IK_CXX)
1660      .Case("objective-c++-header", IK_ObjCXX)
1661      .Case("ast", IK_AST)
1662      .Case("ir", IK_LLVM_IR)
1663      .Default(IK_None);
1664    if (DashX == IK_None)
1665      Diags.Report(diag::err_drv_invalid_value)
1666        << A->getAsString(Args) << A->getValue(Args);
1667  }
1668
1669  // '-' is the default input if none is given.
1670  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1671  Opts.Inputs.clear();
1672  if (Inputs.empty())
1673    Inputs.push_back("-");
1674  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1675    InputKind IK = DashX;
1676    if (IK == IK_None) {
1677      IK = FrontendOptions::getInputKindForExtension(
1678        StringRef(Inputs[i]).rsplit('.').second);
1679      // FIXME: Remove this hack.
1680      if (i == 0)
1681        DashX = IK;
1682    }
1683    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1684  }
1685
1686  return DashX;
1687}
1688
1689std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1690                                                 void *MainAddr) {
1691  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1692
1693  if (!P.isEmpty()) {
1694    P.eraseComponent();  // Remove /clang from foo/bin/clang
1695    P.eraseComponent();  // Remove /bin   from foo/bin
1696
1697    // Get foo/lib/clang/<version>/include
1698    P.appendComponent("lib");
1699    P.appendComponent("clang");
1700    P.appendComponent(CLANG_VERSION_STRING);
1701  }
1702
1703  return P.str();
1704}
1705
1706static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1707  using namespace options;
1708  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1709  Opts.Verbose = Args.hasArg(OPT_v);
1710  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1711  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1712  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1713  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1714    Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1715  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1716  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1717  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1718
1719  // Add -I..., -F..., and -index-header-map options in order.
1720  bool IsIndexHeaderMap = false;
1721  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1722                                             OPT_index_header_map),
1723       ie = Args.filtered_end(); it != ie; ++it) {
1724    if ((*it)->getOption().matches(OPT_index_header_map)) {
1725      // -index-header-map applies to the next -I or -F.
1726      IsIndexHeaderMap = true;
1727      continue;
1728    }
1729
1730    frontend::IncludeDirGroup Group
1731      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1732
1733    Opts.AddPath((*it)->getValue(Args), Group, true,
1734                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1735    IsIndexHeaderMap = false;
1736  }
1737
1738  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1739  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1740  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1741                                             OPT_iwithprefixbefore),
1742         ie = Args.filtered_end(); it != ie; ++it) {
1743    const Arg *A = *it;
1744    if (A->getOption().matches(OPT_iprefix))
1745      Prefix = A->getValue(Args);
1746    else if (A->getOption().matches(OPT_iwithprefix))
1747      Opts.AddPath(Prefix.str() + A->getValue(Args),
1748                   frontend::System, false, false, false);
1749    else
1750      Opts.AddPath(Prefix.str() + A->getValue(Args),
1751                   frontend::Angled, false, false, false);
1752  }
1753
1754  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1755         ie = Args.filtered_end(); it != ie; ++it)
1756    Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1757  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1758         ie = Args.filtered_end(); it != ie; ++it)
1759    Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1760  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1761         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1762    Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1763                 !(*it)->getOption().matches(OPT_iwithsysroot));
1764  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1765         ie = Args.filtered_end(); it != ie; ++it)
1766    Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1767                 true);
1768
1769  // Add the paths for the various language specific isystem flags.
1770  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1771       ie = Args.filtered_end(); it != ie; ++it)
1772    Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1773  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1774       ie = Args.filtered_end(); it != ie; ++it)
1775    Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1776  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1777       ie = Args.filtered_end(); it != ie; ++it)
1778    Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1779  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1780       ie = Args.filtered_end(); it != ie; ++it)
1781    Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1782                 true);
1783
1784  // Add the internal paths from a driver that detects standard include paths.
1785  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1786                                            OPT_internal_externc_isystem),
1787                    E = Args.filtered_end();
1788       I != E; ++I)
1789    Opts.AddPath((*I)->getValue(Args), frontend::System,
1790                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1791                 (*I)->getOption().matches(OPT_internal_externc_isystem));
1792
1793  // Add the path prefixes which are implicitly treated as being system headers.
1794  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1795                                            OPT_ino_system_prefix),
1796                    E = Args.filtered_end();
1797       I != E; ++I)
1798    Opts.AddSystemHeaderPrefix((*I)->getValue(Args),
1799                               (*I)->getOption().matches(OPT_isystem_prefix));
1800}
1801
1802void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1803                                         LangStandard::Kind LangStd) {
1804  // Set some properties which depend solely on the input kind; it would be nice
1805  // to move these to the language standard, and have the driver resolve the
1806  // input kind + language standard.
1807  if (IK == IK_Asm) {
1808    Opts.AsmPreprocessor = 1;
1809  } else if (IK == IK_ObjC ||
1810             IK == IK_ObjCXX ||
1811             IK == IK_PreprocessedObjC ||
1812             IK == IK_PreprocessedObjCXX) {
1813    Opts.ObjC1 = Opts.ObjC2 = 1;
1814  }
1815
1816  if (LangStd == LangStandard::lang_unspecified) {
1817    // Based on the base language, pick one.
1818    switch (IK) {
1819    case IK_None:
1820    case IK_AST:
1821    case IK_LLVM_IR:
1822      llvm_unreachable("Invalid input kind!");
1823    case IK_OpenCL:
1824      LangStd = LangStandard::lang_opencl;
1825      break;
1826    case IK_CUDA:
1827      LangStd = LangStandard::lang_cuda;
1828      break;
1829    case IK_Asm:
1830    case IK_C:
1831    case IK_PreprocessedC:
1832    case IK_ObjC:
1833    case IK_PreprocessedObjC:
1834      LangStd = LangStandard::lang_gnu99;
1835      break;
1836    case IK_CXX:
1837    case IK_PreprocessedCXX:
1838    case IK_ObjCXX:
1839    case IK_PreprocessedObjCXX:
1840      LangStd = LangStandard::lang_gnucxx98;
1841      break;
1842    }
1843  }
1844
1845  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1846  Opts.BCPLComment = Std.hasBCPLComments();
1847  Opts.C99 = Std.isC99();
1848  Opts.C11 = Std.isC11();
1849  Opts.CPlusPlus = Std.isCPlusPlus();
1850  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1851  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1852  Opts.Digraphs = Std.hasDigraphs();
1853  Opts.GNUMode = Std.isGNUMode();
1854  Opts.GNUInline = !Std.isC99();
1855  Opts.HexFloats = Std.hasHexFloats();
1856  Opts.ImplicitInt = Std.hasImplicitInt();
1857
1858  // Set OpenCL Version.
1859  if (LangStd == LangStandard::lang_opencl) {
1860    Opts.OpenCL = 1;
1861    Opts.OpenCLVersion = 100;
1862  }
1863  else if (LangStd == LangStandard::lang_opencl11) {
1864      Opts.OpenCL = 1;
1865      Opts.OpenCLVersion = 110;
1866  }
1867  else if (LangStd == LangStandard::lang_opencl12) {
1868    Opts.OpenCL = 1;
1869    Opts.OpenCLVersion = 120;
1870  }
1871
1872  // OpenCL has some additional defaults.
1873  if (Opts.OpenCL) {
1874    Opts.AltiVec = 0;
1875    Opts.CXXOperatorNames = 1;
1876    Opts.LaxVectorConversions = 0;
1877    Opts.DefaultFPContract = 1;
1878  }
1879
1880  if (LangStd == LangStandard::lang_cuda)
1881    Opts.CUDA = 1;
1882
1883  // OpenCL and C++ both have bool, true, false keywords.
1884  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1885
1886  // C++ has wchar_t keyword.
1887  Opts.WChar = Opts.CPlusPlus;
1888
1889  Opts.GNUKeywords = Opts.GNUMode;
1890  Opts.CXXOperatorNames = Opts.CPlusPlus;
1891
1892  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1893  // is specified, or -std is set to a conforming mode.
1894  Opts.Trigraphs = !Opts.GNUMode;
1895
1896  Opts.DollarIdents = !Opts.AsmPreprocessor;
1897}
1898
1899static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1900                          DiagnosticsEngine &Diags) {
1901  // FIXME: Cleanup per-file based stuff.
1902  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1903  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1904    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1905#define LANGSTANDARD(id, name, desc, features) \
1906      .Case(name, LangStandard::lang_##id)
1907#include "clang/Frontend/LangStandards.def"
1908      .Default(LangStandard::lang_unspecified);
1909    if (LangStd == LangStandard::lang_unspecified)
1910      Diags.Report(diag::err_drv_invalid_value)
1911        << A->getAsString(Args) << A->getValue(Args);
1912    else {
1913      // Valid standard, check to make sure language and standard are compatable.
1914      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1915      switch (IK) {
1916      case IK_C:
1917      case IK_ObjC:
1918      case IK_PreprocessedC:
1919      case IK_PreprocessedObjC:
1920        if (!(Std.isC89() || Std.isC99()))
1921          Diags.Report(diag::err_drv_argument_not_allowed_with)
1922            << A->getAsString(Args) << "C/ObjC";
1923        break;
1924      case IK_CXX:
1925      case IK_ObjCXX:
1926      case IK_PreprocessedCXX:
1927      case IK_PreprocessedObjCXX:
1928        if (!Std.isCPlusPlus())
1929          Diags.Report(diag::err_drv_argument_not_allowed_with)
1930            << A->getAsString(Args) << "C++/ObjC++";
1931        break;
1932      case IK_OpenCL:
1933        if (!Std.isC99())
1934          Diags.Report(diag::err_drv_argument_not_allowed_with)
1935            << A->getAsString(Args) << "OpenCL";
1936        break;
1937      case IK_CUDA:
1938        if (!Std.isCPlusPlus())
1939          Diags.Report(diag::err_drv_argument_not_allowed_with)
1940            << A->getAsString(Args) << "CUDA";
1941        break;
1942      default:
1943        break;
1944      }
1945    }
1946  }
1947
1948  // -cl-std only applies for OpenCL language standards.
1949  // Override the -std option in this case.
1950  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1951    LangStandard::Kind OpenCLLangStd
1952    = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1953    .Case("CL", LangStandard::lang_opencl)
1954    .Case("CL1.1", LangStandard::lang_opencl11)
1955    .Case("CL1.2", LangStandard::lang_opencl12)
1956    .Default(LangStandard::lang_unspecified);
1957
1958    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1959      Diags.Report(diag::err_drv_invalid_value)
1960      << A->getAsString(Args) << A->getValue(Args);
1961    }
1962    else
1963      LangStd = OpenCLLangStd;
1964  }
1965
1966  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1967
1968  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1969  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1970  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1971  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1972  // name, as it doesn't seem a useful distinction.
1973  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1974                                  Opts.GNUKeywords);
1975
1976  if (Args.hasArg(OPT_fno_operator_names))
1977    Opts.CXXOperatorNames = 0;
1978
1979  if (Opts.ObjC1) {
1980    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1981      StringRef value = arg->getValue(Args);
1982      if (Opts.ObjCRuntime.tryParse(value))
1983        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1984    }
1985
1986    if (Args.hasArg(OPT_fobjc_gc_only))
1987      Opts.setGC(LangOptions::GCOnly);
1988    else if (Args.hasArg(OPT_fobjc_gc))
1989      Opts.setGC(LangOptions::HybridGC);
1990    else if (Args.hasArg(OPT_fobjc_arc)) {
1991      Opts.ObjCAutoRefCount = 1;
1992      if (!Opts.ObjCRuntime.allowsARC())
1993        Diags.Report(diag::err_arc_unsupported_on_runtime);
1994
1995      // Only set ObjCARCWeak if ARC is enabled.
1996      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1997        Opts.ObjCARCWeak = 1;
1998      else
1999        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
2000    }
2001
2002    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
2003      Opts.ObjCInferRelatedResultType = 0;
2004  }
2005
2006  if (Args.hasArg(OPT_fgnu89_inline))
2007    Opts.GNUInline = 1;
2008
2009  if (Args.hasArg(OPT_fapple_kext)) {
2010    if (!Opts.CPlusPlus)
2011      Diags.Report(diag::warn_c_kext);
2012    else
2013      Opts.AppleKext = 1;
2014  }
2015
2016  if (Args.hasArg(OPT_print_ivar_layout))
2017    Opts.ObjCGCBitmapPrint = 1;
2018  if (Args.hasArg(OPT_fno_constant_cfstrings))
2019    Opts.NoConstantCFStrings = 1;
2020
2021  if (Args.hasArg(OPT_faltivec))
2022    Opts.AltiVec = 1;
2023
2024  if (Args.hasArg(OPT_pthread))
2025    Opts.POSIXThreads = 1;
2026
2027  if (Args.hasArg(OPT_fdelayed_template_parsing))
2028    Opts.DelayedTemplateParsing = 1;
2029
2030  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
2031  if (Vis == "default")
2032    Opts.setVisibilityMode(DefaultVisibility);
2033  else if (Vis == "hidden")
2034    Opts.setVisibilityMode(HiddenVisibility);
2035  else if (Vis == "protected")
2036    // FIXME: diagnose if target does not support protected visibility
2037    Opts.setVisibilityMode(ProtectedVisibility);
2038  else
2039    Diags.Report(diag::err_drv_invalid_value)
2040      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
2041
2042  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2043    StringRef Val = A->getValue(Args);
2044    if (Val == "fast")
2045      Opts.setFPContractMode(LangOptions::FPC_Fast);
2046    else if (Val == "on")
2047      Opts.setFPContractMode(LangOptions::FPC_On);
2048    else if (Val == "off")
2049      Opts.setFPContractMode(LangOptions::FPC_Off);
2050    else
2051      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2052  }
2053
2054  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2055    Opts.InlineVisibilityHidden = 1;
2056
2057  if (Args.hasArg(OPT_ftrapv)) {
2058    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2059    // Set the handler, if one is specified.
2060    Opts.OverflowHandler =
2061        Args.getLastArgValue(OPT_ftrapv_handler);
2062  }
2063  else if (Args.hasArg(OPT_fwrapv))
2064    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2065
2066  if (Args.hasArg(OPT_trigraphs))
2067    Opts.Trigraphs = 1;
2068
2069  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2070                                   OPT_fno_dollars_in_identifiers,
2071                                   Opts.DollarIdents);
2072  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2073  Opts.MicrosoftExt
2074    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
2075  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
2076  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
2077  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2078  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2079  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2080                                   Opts.ConstStrings);
2081  if (Args.hasArg(OPT_fno_lax_vector_conversions))
2082    Opts.LaxVectorConversions = 0;
2083  if (Args.hasArg(OPT_fno_threadsafe_statics))
2084    Opts.ThreadsafeStatics = 0;
2085  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2086  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2087  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2088  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2089  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2090
2091  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
2092  Opts.Blocks = Args.hasArg(OPT_fblocks);
2093  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2094  Opts.Modules = Args.hasArg(OPT_fmodules);
2095  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
2096  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2097  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
2098  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2099  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2100  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2101  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
2102  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2103  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2104  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2105  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
2106  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
2107                                                    Diags);
2108  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
2109                                                    Diags);
2110  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2111  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
2112                                                    0, Diags);
2113  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2114  Opts.ObjCConstantStringClass =
2115    Args.getLastArgValue(OPT_fconstant_string_class);
2116  Opts.ObjCDefaultSynthProperties =
2117    Args.hasArg(OPT_fobjc_default_synthesize_properties);
2118  Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
2119  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2120  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
2121  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
2122  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
2123  Opts.Static = Args.hasArg(OPT_static_define);
2124  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2125  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2126                        || Args.hasArg(OPT_fdump_record_layouts);
2127  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2128  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2129  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2130  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2131  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2132  Opts.MRTD = Args.hasArg(OPT_mrtd);
2133  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2134  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2135  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2136  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2137  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2138  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2139  Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
2140  Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
2141  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2142  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
2143
2144  // Record whether the __DEPRECATED define was requested.
2145  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2146                                 OPT_fno_deprecated_macro,
2147                                 Opts.Deprecated);
2148
2149  // FIXME: Eliminate this dependency.
2150  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2151       OptSize = getOptimizationLevelSize(Args, IK, Diags);
2152  Opts.Optimize = Opt != 0;
2153  Opts.OptimizeSize = OptSize != 0;
2154
2155  // This is the __NO_INLINE__ define, which just depends on things like the
2156  // optimization level and -fno-inline, not actually whether the backend has
2157  // inlining enabled.
2158  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2159
2160  Opts.FastMath = Args.hasArg(OPT_ffast_math);
2161  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
2162
2163  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
2164
2165  Opts.RetainCommentsFromSystemHeaders =
2166      Args.hasArg(OPT_fretain_comments_from_system_headers);
2167
2168  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
2169  switch (SSP) {
2170  default:
2171    Diags.Report(diag::err_drv_invalid_value)
2172      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2173    break;
2174  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2175  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2176  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
2177  }
2178}
2179
2180static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2181                                  FileManager &FileMgr,
2182                                  DiagnosticsEngine &Diags) {
2183  using namespace options;
2184  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2185  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2186  if (const Arg *A = Args.getLastArg(OPT_token_cache))
2187      Opts.TokenCache = A->getValue(Args);
2188  else
2189    Opts.TokenCache = Opts.ImplicitPTHInclude;
2190  Opts.UsePredefines = !Args.hasArg(OPT_undef);
2191  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2192  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2193
2194  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2195  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
2196         ie = Args.filtered_end(); it != ie; ++it) {
2197    const Arg *A = *it;
2198    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
2199  }
2200
2201  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2202    StringRef Value(A->getValue(Args));
2203    size_t Comma = Value.find(',');
2204    unsigned Bytes = 0;
2205    unsigned EndOfLine = 0;
2206
2207    if (Comma == StringRef::npos ||
2208        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2209        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2210      Diags.Report(diag::err_drv_preamble_format);
2211    else {
2212      Opts.PrecompiledPreambleBytes.first = Bytes;
2213      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2214    }
2215  }
2216
2217  // Add macros from the command line.
2218  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
2219         ie = Args.filtered_end(); it != ie; ++it) {
2220    if ((*it)->getOption().matches(OPT_D))
2221      Opts.addMacroDef((*it)->getValue(Args));
2222    else
2223      Opts.addMacroUndef((*it)->getValue(Args));
2224  }
2225
2226  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2227
2228  // Add the ordered list of -includes.
2229  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
2230                                             OPT_include_pth),
2231         ie = Args.filtered_end(); it != ie; ++it) {
2232    const Arg *A = *it;
2233    Opts.Includes.push_back(A->getValue(Args));
2234  }
2235
2236  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2237         ie = Args.filtered_end(); it != ie; ++it) {
2238    const Arg *A = *it;
2239    Opts.ChainedIncludes.push_back(A->getValue(Args));
2240  }
2241
2242  // Include 'altivec.h' if -faltivec option present
2243  if (Args.hasArg(OPT_faltivec))
2244    Opts.Includes.push_back("altivec.h");
2245
2246  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2247         ie = Args.filtered_end(); it != ie; ++it) {
2248    const Arg *A = *it;
2249    std::pair<StringRef,StringRef> Split =
2250      StringRef(A->getValue(Args)).split(';');
2251
2252    if (Split.second.empty()) {
2253      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2254      continue;
2255    }
2256
2257    Opts.addRemappedFile(Split.first, Split.second);
2258  }
2259
2260  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2261    StringRef Name = A->getValue(Args);
2262    unsigned Library = llvm::StringSwitch<unsigned>(Name)
2263      .Case("libc++", ARCXX_libcxx)
2264      .Case("libstdc++", ARCXX_libstdcxx)
2265      .Case("none", ARCXX_nolib)
2266      .Default(~0U);
2267    if (Library == ~0U)
2268      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2269    else
2270      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2271  }
2272}
2273
2274static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2275                                        ArgList &Args) {
2276  using namespace options;
2277  Opts.ShowCPP = !Args.hasArg(OPT_dM);
2278  Opts.ShowComments = Args.hasArg(OPT_C);
2279  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2280  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2281  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2282  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2283}
2284
2285static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2286  using namespace options;
2287  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2288  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2289  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2290  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2291  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2292  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2293
2294  // Use the default target triple if unspecified.
2295  if (Opts.Triple.empty())
2296    Opts.Triple = llvm::sys::getDefaultTargetTriple();
2297}
2298
2299//
2300
2301bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2302                                        const char *const *ArgBegin,
2303                                        const char *const *ArgEnd,
2304                                        DiagnosticsEngine &Diags) {
2305  bool Success = true;
2306
2307  // Parse the arguments.
2308  OwningPtr<OptTable> Opts(createDriverOptTable());
2309  unsigned MissingArgIndex, MissingArgCount;
2310  OwningPtr<InputArgList> Args(
2311    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2312
2313  // Check for missing argument error.
2314  if (MissingArgCount) {
2315    Diags.Report(diag::err_drv_missing_argument)
2316      << Args->getArgString(MissingArgIndex) << MissingArgCount;
2317    Success = false;
2318  }
2319
2320  // Issue errors on unknown arguments.
2321  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2322         ie = Args->filtered_end(); it != ie; ++it) {
2323    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2324    Success = false;
2325  }
2326
2327  // Issue errors on arguments that are not valid for CC1.
2328  for (ArgList::iterator I = Args->begin(), E = Args->end();
2329       I != E; ++I) {
2330    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
2331      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
2332      Success = false;
2333    }
2334  }
2335
2336  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
2337  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2338  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2339  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
2340            && Success;
2341  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2342  // FIXME: We shouldn't have to pass the DashX option around here
2343  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2344  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2345            && Success;
2346  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2347  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2348    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2349    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2350      Res.getLangOpts()->ObjCExceptions = 1;
2351  }
2352  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2353  // PCH file and find the original header name. Remove the need to do that in
2354  // ParsePreprocessorArgs and remove the FileManager
2355  // parameters from the function and the "FileManager.h" #include.
2356  FileManager FileMgr(Res.getFileSystemOpts());
2357  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2358  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2359  ParseTargetArgs(Res.getTargetOpts(), *Args);
2360
2361  return Success;
2362}
2363
2364namespace {
2365
2366  class ModuleSignature {
2367    llvm::SmallVector<uint64_t, 16> Data;
2368    unsigned CurBit;
2369    uint64_t CurValue;
2370
2371  public:
2372    ModuleSignature() : CurBit(0), CurValue(0) { }
2373
2374    void add(uint64_t Value, unsigned Bits);
2375    void add(StringRef Value);
2376    void flush();
2377
2378    llvm::APInt getAsInteger() const;
2379  };
2380}
2381
2382void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2383  CurValue |= Value << CurBit;
2384  if (CurBit + NumBits < 64) {
2385    CurBit += NumBits;
2386    return;
2387  }
2388
2389  // Add the current word.
2390  Data.push_back(CurValue);
2391
2392  if (CurBit)
2393    CurValue = Value >> (64-CurBit);
2394  else
2395    CurValue = 0;
2396  CurBit = (CurBit+NumBits) & 63;
2397}
2398
2399void ModuleSignature::flush() {
2400  if (CurBit == 0)
2401    return;
2402
2403  Data.push_back(CurValue);
2404  CurBit = 0;
2405  CurValue = 0;
2406}
2407
2408void ModuleSignature::add(StringRef Value) {
2409  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2410    add(*I, 8);
2411}
2412
2413llvm::APInt ModuleSignature::getAsInteger() const {
2414  return llvm::APInt(Data.size() * 64, Data);
2415}
2416
2417std::string CompilerInvocation::getModuleHash() const {
2418  ModuleSignature Signature;
2419
2420  // Start the signature with the compiler version.
2421  // FIXME: The full version string can be quite long.  Omit it from the
2422  // module hash for now to avoid failures where the path name becomes too
2423  // long.  An MD5 or similar checksum would work well here.
2424  // Signature.add(getClangFullRepositoryVersion());
2425
2426  // Extend the signature with the language options
2427#define LANGOPT(Name, Bits, Default, Description) \
2428  Signature.add(LangOpts->Name, Bits);
2429#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2430  Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2431#define BENIGN_LANGOPT(Name, Bits, Default, Description)
2432#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2433#include "clang/Basic/LangOptions.def"
2434
2435  // Extend the signature with the target triple
2436  // FIXME: Add target options.
2437  llvm::Triple T(TargetOpts->Triple);
2438  Signature.add((unsigned)T.getArch(), 5);
2439  Signature.add((unsigned)T.getVendor(), 4);
2440  Signature.add((unsigned)T.getOS(), 5);
2441  Signature.add((unsigned)T.getEnvironment(), 4);
2442
2443  // Extend the signature with preprocessor options.
2444  Signature.add(getPreprocessorOpts().UsePredefines, 1);
2445  Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2446
2447  // Hash the preprocessor defines.
2448  // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2449  std::vector<StringRef> MacroDefs;
2450  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2451            I = getPreprocessorOpts().Macros.begin(),
2452         IEnd = getPreprocessorOpts().Macros.end();
2453       I != IEnd; ++I) {
2454    if (!I->second)
2455      MacroDefs.push_back(I->first);
2456  }
2457  llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2458
2459  unsigned PPHashResult = 0;
2460  for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2461    PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2462  Signature.add(PPHashResult, 32);
2463
2464  // We've generated the signature. Treat it as one large APInt that we'll
2465  // encode in base-36 and return.
2466  Signature.flush();
2467  return Signature.getAsInteger().toString(36, /*Signed=*/false);
2468}
2469