xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 265087721ae2938b3886d68898e5eec5bd4a3816)
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/CC1Options.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"
31 using namespace clang;
32 
33 //===----------------------------------------------------------------------===//
34 // Initialization.
35 //===----------------------------------------------------------------------===//
36 
37 CompilerInvocationBase::CompilerInvocationBase()
38   : LangOpts(new LangOptions()) {}
39 
40 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
41   : RefCountedBase<CompilerInvocation>(),
42     LangOpts(new LangOptions(*X.getLangOpts())) {}
43 
44 //===----------------------------------------------------------------------===//
45 // Utility functions.
46 //===----------------------------------------------------------------------===//
47 
48 static const char *getAnalysisStoreName(AnalysisStores Kind) {
49   switch (Kind) {
50   default:
51     llvm_unreachable("Unknown analysis store!");
52 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
53   case NAME##Model: return CMDFLAG;
54 #include "clang/Frontend/Analyses.def"
55   }
56 }
57 
58 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
59   switch (Kind) {
60   default:
61     llvm_unreachable("Unknown analysis constraints!");
62 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
63   case NAME##Model: return CMDFLAG;
64 #include "clang/Frontend/Analyses.def"
65   }
66 }
67 
68 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
69   switch (Kind) {
70   default:
71     llvm_unreachable("Unknown analysis client!");
72 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
73   case PD_##NAME: return CMDFLAG;
74 #include "clang/Frontend/Analyses.def"
75   }
76 }
77 
78 static const char *getAnalysisPurgeModeName(AnalysisPurgeMode Kind) {
79   switch (Kind) {
80   default:
81     llvm_unreachable("Unknown analysis client!");
82 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
83   case NAME: return CMDFLAG;
84 #include "clang/Frontend/Analyses.def"
85   }
86 }
87 
88 //===----------------------------------------------------------------------===//
89 // Serialization (to args)
90 //===----------------------------------------------------------------------===//
91 
92 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
93                                std::vector<std::string> &Res) {
94   if (Opts.ShowCheckerHelp)
95     Res.push_back("-analyzer-checker-help");
96   if (Opts.AnalysisStoreOpt != RegionStoreModel) {
97     Res.push_back("-analyzer-store");
98     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
99   }
100   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
101     Res.push_back("-analyzer-constraints");
102     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
103   }
104   if (Opts.AnalysisDiagOpt != PD_HTML) {
105     Res.push_back("-analyzer-output");
106     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
107   }
108   if (Opts.AnalysisPurgeOpt != PurgeStmt) {
109     Res.push_back("-analyzer-purge");
110     Res.push_back(getAnalysisPurgeModeName(Opts.AnalysisPurgeOpt));
111   }
112   if (!Opts.AnalyzeSpecificFunction.empty()) {
113     Res.push_back("-analyze-function");
114     Res.push_back(Opts.AnalyzeSpecificFunction);
115   }
116   if (Opts.AnalyzeAll)
117     Res.push_back("-analyzer-opt-analyze-headers");
118   if (Opts.AnalyzerDisplayProgress)
119     Res.push_back("-analyzer-display-progress");
120   if (Opts.AnalyzeNestedBlocks)
121     Res.push_back("-analyzer-opt-analyze-nested-blocks");
122   if (Opts.EagerlyAssume)
123     Res.push_back("-analyzer-eagerly-assume");
124   if (Opts.TrimGraph)
125     Res.push_back("-trim-egraph");
126   if (Opts.VisualizeEGDot)
127     Res.push_back("-analyzer-viz-egraph-graphviz");
128   if (Opts.VisualizeEGUbi)
129     Res.push_back("-analyzer-viz-egraph-ubigraph");
130 
131   for (unsigned i = 0, e = Opts.CheckersControlList.size(); i != e; ++i) {
132     const std::pair<std::string, bool> &opt = Opts.CheckersControlList[i];
133     if (opt.second)
134       Res.push_back("-analyzer-disable-checker");
135     else
136       Res.push_back("-analyzer-checker");
137     Res.push_back(opt.first);
138   }
139 }
140 
141 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
142                               std::vector<std::string> &Res) {
143   if (Opts.DebugInfo)
144     Res.push_back("-g");
145   if (Opts.DisableLLVMOpts)
146     Res.push_back("-disable-llvm-optzns");
147   if (Opts.DisableRedZone)
148     Res.push_back("-disable-red-zone");
149   if (Opts.DisableTailCalls)
150     Res.push_back("-mdisable-tail-calls");
151   if (!Opts.DebugCompilationDir.empty()) {
152     Res.push_back("-fdebug-compilation-dir");
153     Res.push_back(Opts.DebugCompilationDir);
154   }
155   if (!Opts.DwarfDebugFlags.empty()) {
156     Res.push_back("-dwarf-debug-flags");
157     Res.push_back(Opts.DwarfDebugFlags);
158   }
159   if (Opts.ObjCRuntimeHasARC)
160     Res.push_back("-fobjc-runtime-has-arc");
161   if (Opts.ObjCRuntimeHasTerminate)
162     Res.push_back("-fobjc-runtime-has-terminate");
163   if (Opts.EmitGcovArcs)
164     Res.push_back("-femit-coverage-data");
165   if (Opts.EmitGcovNotes)
166     Res.push_back("-femit-coverage-notes");
167   if (!Opts.MergeAllConstants)
168     Res.push_back("-fno-merge-all-constants");
169   if (Opts.NoCommon)
170     Res.push_back("-fno-common");
171   if (Opts.ForbidGuardVariables)
172     Res.push_back("-fforbid-guard-variables");
173   if (Opts.UseRegisterSizedBitfieldAccess)
174     Res.push_back("-fuse-register-sized-bitfield-access");
175   if (Opts.NoImplicitFloat)
176     Res.push_back("-no-implicit-float");
177   if (Opts.OmitLeafFramePointer)
178     Res.push_back("-momit-leaf-frame-pointer");
179   if (Opts.OptimizeSize) {
180     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
181     Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
182   } else if (Opts.OptimizationLevel != 0)
183     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
184   if (!Opts.MainFileName.empty()) {
185     Res.push_back("-main-file-name");
186     Res.push_back(Opts.MainFileName);
187   }
188   if (Opts.NoInfsFPMath)
189     Res.push_back("-menable-no-infinities");
190   if (Opts.NoNaNsFPMath)
191     Res.push_back("-menable-no-nans");
192   // SimplifyLibCalls is only derived.
193   // TimePasses is only derived.
194   // UnitAtATime is unused.
195   // Inlining is only derived.
196 
197   // UnrollLoops is derived, but also accepts an option, no
198   // harm in pushing it back here.
199   if (Opts.UnrollLoops)
200     Res.push_back("-funroll-loops");
201   if (Opts.DataSections)
202     Res.push_back("-fdata-sections");
203   if (Opts.FunctionSections)
204     Res.push_back("-ffunction-sections");
205   if (Opts.AsmVerbose)
206     Res.push_back("-masm-verbose");
207   if (!Opts.CodeModel.empty()) {
208     Res.push_back("-mcode-model");
209     Res.push_back(Opts.CodeModel);
210   }
211   if (Opts.CUDAIsDevice)
212     Res.push_back("-fcuda-is-device");
213   if (!Opts.CXAAtExit)
214     Res.push_back("-fno-use-cxa-atexit");
215   if (Opts.CXXCtorDtorAliases)
216     Res.push_back("-mconstructor-aliases");
217   if (Opts.ObjCAutoRefCountExceptions)
218     Res.push_back("-fobjc-arc-eh");
219   if (!Opts.DebugPass.empty()) {
220     Res.push_back("-mdebug-pass");
221     Res.push_back(Opts.DebugPass);
222   }
223   if (Opts.DisableFPElim)
224     Res.push_back("-mdisable-fp-elim");
225   if (!Opts.FloatABI.empty()) {
226     Res.push_back("-mfloat-abi");
227     Res.push_back(Opts.FloatABI);
228   }
229   if (!Opts.LimitFloatPrecision.empty()) {
230     Res.push_back("-mlimit-float-precision");
231     Res.push_back(Opts.LimitFloatPrecision);
232   }
233   if (Opts.NoZeroInitializedInBSS)
234     Res.push_back("-mno-zero-initialized-bss");
235   switch (Opts.getObjCDispatchMethod()) {
236   case CodeGenOptions::Legacy:
237     break;
238   case CodeGenOptions::Mixed:
239     Res.push_back("-fobjc-dispatch-method=mixed");
240     break;
241   case CodeGenOptions::NonLegacy:
242     Res.push_back("-fobjc-dispatch-method=non-legacy");
243     break;
244   }
245   if (Opts.NumRegisterParameters) {
246     Res.push_back("-mregparm");
247     Res.push_back(llvm::utostr(Opts.NumRegisterParameters));
248   }
249   if (Opts.NoGlobalMerge)
250     Res.push_back("-mno-global-merge");
251   if (Opts.NoExecStack)
252     Res.push_back("-mnoexecstack");
253   if (Opts.RelaxAll)
254     Res.push_back("-mrelax-all");
255   if (Opts.SaveTempLabels)
256     Res.push_back("-msave-temp-labels");
257   if (Opts.NoDwarf2CFIAsm)
258     Res.push_back("-fno-dwarf2-cfi-asm");
259   if (Opts.NoDwarfDirectoryAsm)
260     Res.push_back("-fno-dwarf-directory-asm");
261   if (Opts.SoftFloat)
262     Res.push_back("-msoft-float");
263   if (Opts.UnwindTables)
264     Res.push_back("-munwind-tables");
265   if (Opts.RelocationModel != "pic") {
266     Res.push_back("-mrelocation-model");
267     Res.push_back(Opts.RelocationModel);
268   }
269   if (!Opts.VerifyModule)
270     Res.push_back("-disable-llvm-verifier");
271   for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i) {
272     Res.push_back("-backend-option");
273     Res.push_back(Opts.BackendOptions[i]);
274   }
275 }
276 
277 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
278                                        std::vector<std::string> &Res) {
279   if (Opts.IncludeSystemHeaders)
280     Res.push_back("-sys-header-deps");
281   if (Opts.ShowHeaderIncludes)
282     Res.push_back("-H");
283   if (!Opts.HeaderIncludeOutputFile.empty()) {
284     Res.push_back("-header-include-file");
285     Res.push_back(Opts.HeaderIncludeOutputFile);
286   }
287   if (Opts.UsePhonyTargets)
288     Res.push_back("-MP");
289   if (!Opts.OutputFile.empty()) {
290     Res.push_back("-dependency-file");
291     Res.push_back(Opts.OutputFile);
292   }
293   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
294     Res.push_back("-MT");
295     Res.push_back(Opts.Targets[i]);
296   }
297 }
298 
299 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
300                                  std::vector<std::string> &Res) {
301   if (Opts.IgnoreWarnings)
302     Res.push_back("-w");
303   if (Opts.NoRewriteMacros)
304     Res.push_back("-Wno-rewrite-macros");
305   if (Opts.Pedantic)
306     Res.push_back("-pedantic");
307   if (Opts.PedanticErrors)
308     Res.push_back("-pedantic-errors");
309   if (!Opts.ShowColumn)
310     Res.push_back("-fno-show-column");
311   if (!Opts.ShowLocation)
312     Res.push_back("-fno-show-source-location");
313   if (!Opts.ShowCarets)
314     Res.push_back("-fno-caret-diagnostics");
315   if (!Opts.ShowFixits)
316     Res.push_back("-fno-diagnostics-fixit-info");
317   if (Opts.ShowSourceRanges)
318     Res.push_back("-fdiagnostics-print-source-range-info");
319   if (Opts.ShowParseableFixits)
320     Res.push_back("-fdiagnostics-parseable-fixits");
321   if (Opts.ShowColors)
322     Res.push_back("-fcolor-diagnostics");
323   if (Opts.VerifyDiagnostics)
324     Res.push_back("-verify");
325   if (Opts.ShowOptionNames)
326     Res.push_back("-fdiagnostics-show-option");
327   if (Opts.ShowCategories == 1)
328     Res.push_back("-fdiagnostics-show-category=id");
329   else if (Opts.ShowCategories == 2)
330     Res.push_back("-fdiagnostics-show-category=name");
331   switch (Opts.Format) {
332   case DiagnosticOptions::Clang:
333     Res.push_back("-fdiagnostics-format=clang"); break;
334   case DiagnosticOptions::Msvc:
335     Res.push_back("-fdiagnostics-format=msvc");  break;
336   case DiagnosticOptions::Vi:
337     Res.push_back("-fdiagnostics-format=vi");    break;
338   }
339   if (Opts.ErrorLimit) {
340     Res.push_back("-ferror-limit");
341     Res.push_back(llvm::utostr(Opts.ErrorLimit));
342   }
343   if (!Opts.DiagnosticLogFile.empty()) {
344     Res.push_back("-diagnostic-log-file");
345     Res.push_back(Opts.DiagnosticLogFile);
346   }
347   if (Opts.MacroBacktraceLimit
348                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
349     Res.push_back("-fmacro-backtrace-limit");
350     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
351   }
352   if (Opts.TemplateBacktraceLimit
353                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
354     Res.push_back("-ftemplate-backtrace-limit");
355     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
356   }
357   if (Opts.ConstexprBacktraceLimit
358                         != DiagnosticOptions::DefaultConstexprBacktraceLimit) {
359     Res.push_back("-fconstexpr-backtrace-limit");
360     Res.push_back(llvm::utostr(Opts.ConstexprBacktraceLimit));
361   }
362 
363   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
364     Res.push_back("-ftabstop");
365     Res.push_back(llvm::utostr(Opts.TabStop));
366   }
367   if (Opts.MessageLength) {
368     Res.push_back("-fmessage-length");
369     Res.push_back(llvm::utostr(Opts.MessageLength));
370   }
371   if (!Opts.DumpBuildInformation.empty()) {
372     Res.push_back("-dump-build-information");
373     Res.push_back(Opts.DumpBuildInformation);
374   }
375   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
376     Res.push_back("-W" + Opts.Warnings[i]);
377 }
378 
379 static const char *getInputKindName(InputKind Kind) {
380   switch (Kind) {
381   case IK_None:              break;
382   case IK_AST:               return "ast";
383   case IK_Asm:               return "assembler-with-cpp";
384   case IK_C:                 return "c";
385   case IK_CXX:               return "c++";
386   case IK_LLVM_IR:           return "ir";
387   case IK_ObjC:              return "objective-c";
388   case IK_ObjCXX:            return "objective-c++";
389   case IK_OpenCL:            return "cl";
390   case IK_CUDA:              return "cuda";
391   case IK_PreprocessedC:     return "cpp-output";
392   case IK_PreprocessedCXX:   return "c++-cpp-output";
393   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
394   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
395   }
396 
397   llvm_unreachable("Unexpected language kind!");
398 }
399 
400 static const char *getActionName(frontend::ActionKind Kind) {
401   switch (Kind) {
402   case frontend::PluginAction:
403     llvm_unreachable("Invalid kind!");
404 
405   case frontend::ASTDump:                return "-ast-dump";
406   case frontend::ASTDumpXML:             return "-ast-dump-xml";
407   case frontend::ASTPrint:               return "-ast-print";
408   case frontend::ASTView:                return "-ast-view";
409   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
410   case frontend::DumpTokens:             return "-dump-tokens";
411   case frontend::EmitAssembly:           return "-S";
412   case frontend::EmitBC:                 return "-emit-llvm-bc";
413   case frontend::EmitHTML:               return "-emit-html";
414   case frontend::EmitLLVM:               return "-emit-llvm";
415   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
416   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
417   case frontend::EmitObj:                return "-emit-obj";
418   case frontend::FixIt:                  return "-fixit";
419   case frontend::GenerateModule:         return "-emit-module";
420   case frontend::GeneratePCH:            return "-emit-pch";
421   case frontend::GeneratePTH:            return "-emit-pth";
422   case frontend::InitOnly:               return "-init-only";
423   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
424   case frontend::PrintDeclContext:       return "-print-decl-contexts";
425   case frontend::PrintPreamble:          return "-print-preamble";
426   case frontend::PrintPreprocessedInput: return "-E";
427   case frontend::RewriteMacros:          return "-rewrite-macros";
428   case frontend::RewriteObjC:            return "-rewrite-objc";
429   case frontend::RewriteTest:            return "-rewrite-test";
430   case frontend::RunAnalysis:            return "-analyze";
431   case frontend::RunPreprocessorOnly:    return "-Eonly";
432   }
433 
434   llvm_unreachable("Unexpected language kind!");
435 }
436 
437 static void FileSystemOptsToArgs(const FileSystemOptions &Opts,
438                                  std::vector<std::string> &Res) {
439   if (!Opts.WorkingDir.empty()) {
440     Res.push_back("-working-directory");
441     Res.push_back(Opts.WorkingDir);
442   }
443 }
444 
445 static void FrontendOptsToArgs(const FrontendOptions &Opts,
446                                std::vector<std::string> &Res) {
447   if (Opts.DisableFree)
448     Res.push_back("-disable-free");
449   if (Opts.RelocatablePCH)
450     Res.push_back("-relocatable-pch");
451   if (Opts.ShowHelp)
452     Res.push_back("-help");
453   if (Opts.ShowMacrosInCodeCompletion)
454     Res.push_back("-code-completion-macros");
455   if (Opts.ShowCodePatternsInCodeCompletion)
456     Res.push_back("-code-completion-patterns");
457   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
458     Res.push_back("-no-code-completion-globals");
459   if (Opts.ShowStats)
460     Res.push_back("-print-stats");
461   if (Opts.ShowTimers)
462     Res.push_back("-ftime-report");
463   if (Opts.ShowVersion)
464     Res.push_back("-version");
465   if (Opts.FixWhatYouCan)
466     Res.push_back("-fix-what-you-can");
467   if (Opts.FixOnlyWarnings)
468     Res.push_back("-fix-only-warnings");
469   if (Opts.FixAndRecompile)
470     Res.push_back("-fixit-recompile");
471   if (Opts.FixToTemporaries)
472     Res.push_back("-fixit-to-temporary");
473   switch (Opts.ARCMTAction) {
474   case FrontendOptions::ARCMT_None:
475     break;
476   case FrontendOptions::ARCMT_Check:
477     Res.push_back("-arcmt-check");
478     break;
479   case FrontendOptions::ARCMT_Modify:
480     Res.push_back("-arcmt-modify");
481     break;
482   case FrontendOptions::ARCMT_Migrate:
483     Res.push_back("-arcmt-migrate");
484     break;
485   }
486   if (!Opts.ARCMTMigrateDir.empty()) {
487     Res.push_back("-arcmt-migrate-directory");
488     Res.push_back(Opts.ARCMTMigrateDir);
489   }
490   if (!Opts.ARCMTMigrateReportOut.empty()) {
491     Res.push_back("-arcmt-migrate-report-output");
492     Res.push_back(Opts.ARCMTMigrateReportOut);
493   }
494   if (Opts.ARCMTMigrateEmitARCErrors)
495     Res.push_back("-arcmt-migrate-emit-errors");
496 
497   bool NeedLang = false;
498   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
499     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
500         Opts.Inputs[i].Kind)
501       NeedLang = true;
502   if (NeedLang) {
503     Res.push_back("-x");
504     Res.push_back(getInputKindName(Opts.Inputs[0].Kind));
505   }
506   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
507     assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
508            "Unable to represent this input vector!");
509     Res.push_back(Opts.Inputs[i].File);
510   }
511 
512   if (!Opts.OutputFile.empty()) {
513     Res.push_back("-o");
514     Res.push_back(Opts.OutputFile);
515   }
516   if (!Opts.CodeCompletionAt.FileName.empty()) {
517     Res.push_back("-code-completion-at");
518     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
519                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
520                   llvm::utostr(Opts.CodeCompletionAt.Column));
521   }
522   if (Opts.ProgramAction != frontend::PluginAction)
523     Res.push_back(getActionName(Opts.ProgramAction));
524   if (!Opts.ActionName.empty()) {
525     Res.push_back("-plugin");
526     Res.push_back(Opts.ActionName);
527     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
528       Res.push_back("-plugin-arg-" + Opts.ActionName);
529       Res.push_back(Opts.PluginArgs[i]);
530     }
531   }
532   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
533     Res.push_back("-load");
534     Res.push_back(Opts.Plugins[i]);
535   }
536   for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
537     Res.push_back("-add-plugin");
538     Res.push_back(Opts.AddPluginActions[i]);
539     for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai) {
540       Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i]);
541       Res.push_back(Opts.AddPluginArgs[i][ai]);
542     }
543   }
544   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
545     Res.push_back("-ast-merge");
546     Res.push_back(Opts.ASTMergeFiles[i]);
547   }
548   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
549     Res.push_back("-mllvm");
550     Res.push_back(Opts.LLVMArgs[i]);
551   }
552   if (!Opts.OverrideRecordLayoutsFile.empty())
553     Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
554 }
555 
556 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
557                                    std::vector<std::string> &Res) {
558   if (Opts.Sysroot != "/") {
559     Res.push_back("-isysroot");
560     Res.push_back(Opts.Sysroot);
561   }
562 
563   /// User specified include entries.
564   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
565     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
566     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
567       llvm::report_fatal_error("Invalid option set!");
568     if (E.IsUserSupplied) {
569       switch (E.Group) {
570       case frontend::After:
571         Res.push_back("-idirafter");
572         break;
573 
574       case frontend::Quoted:
575         Res.push_back("-iquote");
576         break;
577 
578       case frontend::System:
579         Res.push_back("-isystem");
580         break;
581 
582       case frontend::IndexHeaderMap:
583         Res.push_back("-index-header-map");
584         Res.push_back(E.IsFramework? "-F" : "-I");
585         break;
586 
587       case frontend::CSystem:
588         Res.push_back("-c-isystem");
589         break;
590 
591       case frontend::CXXSystem:
592         Res.push_back("-cxx-isystem");
593         break;
594 
595       case frontend::ObjCSystem:
596         Res.push_back("-objc-isystem");
597         break;
598 
599       case frontend::ObjCXXSystem:
600         Res.push_back("-objcxx-isystem");
601         break;
602 
603       case frontend::Angled:
604         Res.push_back(E.IsFramework ? "-F" : "-I");
605         break;
606       }
607     } else {
608       if (E.IsInternal) {
609         assert(E.Group == frontend::System && "Unexpected header search group");
610         if (E.ImplicitExternC)
611           Res.push_back("-internal-externc-isystem");
612         else
613           Res.push_back("-internal-isystem");
614       } else {
615         if (E.Group != frontend::Angled && E.Group != frontend::System)
616           llvm::report_fatal_error("Invalid option set!");
617         Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
618                       "-iwithprefix");
619       }
620     }
621     Res.push_back(E.Path);
622   }
623 
624   if (!Opts.ResourceDir.empty()) {
625     Res.push_back("-resource-dir");
626     Res.push_back(Opts.ResourceDir);
627   }
628   if (!Opts.ModuleCachePath.empty()) {
629     Res.push_back("-fmodule-cache-path");
630     Res.push_back(Opts.ModuleCachePath);
631   }
632   if (!Opts.UseStandardSystemIncludes)
633     Res.push_back("-nostdsysteminc");
634   if (!Opts.UseStandardCXXIncludes)
635     Res.push_back("-nostdinc++");
636   if (Opts.UseLibcxx)
637     Res.push_back("-stdlib=libc++");
638   if (Opts.Verbose)
639     Res.push_back("-v");
640 }
641 
642 static void LangOptsToArgs(const LangOptions &Opts,
643                            std::vector<std::string> &Res) {
644   LangOptions DefaultLangOpts;
645 
646   // FIXME: Need to set -std to get all the implicit options.
647 
648   // FIXME: We want to only pass options relative to the defaults, which
649   // requires constructing a target. :(
650   //
651   // It would be better to push the all target specific choices into the driver,
652   // so that everything below that was more uniform.
653 
654   if (Opts.Trigraphs)
655     Res.push_back("-trigraphs");
656   // Implicit based on the input kind:
657   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
658   // Implicit based on the input language standard:
659   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
660   if (Opts.DollarIdents)
661     Res.push_back("-fdollars-in-identifiers");
662   if (Opts.GNUMode && !Opts.GNUKeywords)
663     Res.push_back("-fno-gnu-keywords");
664   if (!Opts.GNUMode && Opts.GNUKeywords)
665     Res.push_back("-fgnu-keywords");
666   if (Opts.MicrosoftExt)
667     Res.push_back("-fms-extensions");
668   if (Opts.MicrosoftMode)
669     Res.push_back("-fms-compatibility");
670   if (Opts.MSCVersion != 0)
671     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
672   if (Opts.Borland)
673     Res.push_back("-fborland-extensions");
674   if (!Opts.ObjCNonFragileABI)
675     Res.push_back("-fobjc-fragile-abi");
676   if (Opts.ObjCDefaultSynthProperties)
677     Res.push_back("-fobjc-default-synthesize-properties");
678   // NoInline is implicit.
679   if (!Opts.CXXOperatorNames)
680     Res.push_back("-fno-operator-names");
681   if (Opts.PascalStrings)
682     Res.push_back("-fpascal-strings");
683   if (Opts.CatchUndefined)
684     Res.push_back("-fcatch-undefined-behavior");
685   if (Opts.AddressSanitizer)
686     Res.push_back("-faddress-sanitizer");
687   if (Opts.ThreadSanitizer)
688     Res.push_back("-fthread-sanitizer");
689   if (Opts.WritableStrings)
690     Res.push_back("-fwritable-strings");
691   if (Opts.ConstStrings)
692     Res.push_back("-fconst-strings");
693   if (!Opts.LaxVectorConversions)
694     Res.push_back("-fno-lax-vector-conversions");
695   if (Opts.AltiVec)
696     Res.push_back("-faltivec");
697   if (Opts.Exceptions)
698     Res.push_back("-fexceptions");
699   if (Opts.ObjCExceptions)
700     Res.push_back("-fobjc-exceptions");
701   if (Opts.CXXExceptions)
702     Res.push_back("-fcxx-exceptions");
703   if (Opts.SjLjExceptions)
704     Res.push_back("-fsjlj-exceptions");
705   if (Opts.TraditionalCPP)
706     Res.push_back("-traditional-cpp");
707   if (!Opts.RTTI)
708     Res.push_back("-fno-rtti");
709   if (Opts.MSBitfields)
710     Res.push_back("-mms-bitfields");
711   if (!Opts.NeXTRuntime)
712     Res.push_back("-fgnu-runtime");
713   if (Opts.Freestanding)
714     Res.push_back("-ffreestanding");
715   if (Opts.NoBuiltin)
716     Res.push_back("-fno-builtin");
717   if (!Opts.AssumeSaneOperatorNew)
718     Res.push_back("-fno-assume-sane-operator-new");
719   if (!Opts.ThreadsafeStatics)
720     Res.push_back("-fno-threadsafe-statics");
721   if (Opts.POSIXThreads)
722     Res.push_back("-pthread");
723   if (Opts.Blocks)
724     Res.push_back("-fblocks");
725   if (Opts.BlocksRuntimeOptional)
726     Res.push_back("-fblocks-runtime-optional");
727   if (Opts.Modules)
728     Res.push_back("-fmodules");
729   if (Opts.EmitAllDecls)
730     Res.push_back("-femit-all-decls");
731   if (Opts.MathErrno)
732     Res.push_back("-fmath-errno");
733   switch (Opts.getSignedOverflowBehavior()) {
734   case LangOptions::SOB_Undefined: break;
735   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
736   case LangOptions::SOB_Trapping:
737     Res.push_back("-ftrapv");
738     if (!Opts.OverflowHandler.empty()) {
739       Res.push_back("-ftrapv-handler");
740       Res.push_back(Opts.OverflowHandler);
741     }
742     break;
743   }
744   if (Opts.HeinousExtensions)
745     Res.push_back("-fheinous-gnu-extensions");
746   // Optimize is implicit.
747   // OptimizeSize is implicit.
748   if (Opts.FastMath)
749     Res.push_back("-ffast-math");
750   if (Opts.Static)
751     Res.push_back("-static-define");
752   if (Opts.DumpRecordLayoutsSimple)
753     Res.push_back("-fdump-record-layouts-simple");
754   else if (Opts.DumpRecordLayouts)
755     Res.push_back("-fdump-record-layouts");
756   if (Opts.DumpVTableLayouts)
757     Res.push_back("-fdump-vtable-layouts");
758   if (Opts.NoBitFieldTypeAlign)
759     Res.push_back("-fno-bitfield-type-alignment");
760   if (Opts.PICLevel) {
761     Res.push_back("-pic-level");
762     Res.push_back(llvm::utostr(Opts.PICLevel));
763   }
764   if (Opts.ObjCGCBitmapPrint)
765     Res.push_back("-print-ivar-layout");
766   if (Opts.NoConstantCFStrings)
767     Res.push_back("-fno-constant-cfstrings");
768   if (!Opts.AccessControl)
769     Res.push_back("-fno-access-control");
770   if (!Opts.CharIsSigned)
771     Res.push_back("-fno-signed-char");
772   if (Opts.ShortWChar)
773     Res.push_back("-fshort-wchar");
774   if (!Opts.ElideConstructors)
775     Res.push_back("-fno-elide-constructors");
776   if (Opts.getGC() != LangOptions::NonGC) {
777     if (Opts.getGC() == LangOptions::HybridGC) {
778       Res.push_back("-fobjc-gc");
779     } else {
780       assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
781       Res.push_back("-fobjc-gc-only");
782     }
783   }
784   if (Opts.ObjCAutoRefCount)
785     Res.push_back("-fobjc-arc");
786   if (Opts.ObjCRuntimeHasWeak)
787     Res.push_back("-fobjc-runtime-has-weak");
788   if (!Opts.ObjCInferRelatedResultType)
789     Res.push_back("-fno-objc-infer-related-result-type");
790 
791   if (Opts.AppleKext)
792     Res.push_back("-fapple-kext");
793 
794   if (Opts.getVisibilityMode() != DefaultVisibility) {
795     Res.push_back("-fvisibility");
796     if (Opts.getVisibilityMode() == HiddenVisibility) {
797       Res.push_back("hidden");
798     } else {
799       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
800              "Invalid visibility!");
801       Res.push_back("protected");
802     }
803   }
804   if (Opts.InlineVisibilityHidden)
805     Res.push_back("-fvisibility-inlines-hidden");
806 
807   if (Opts.getStackProtector() != 0) {
808     Res.push_back("-stack-protector");
809     Res.push_back(llvm::utostr(Opts.getStackProtector()));
810   }
811   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
812     Res.push_back("-ftemplate-depth");
813     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
814   }
815   if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth) {
816     Res.push_back("-fconstexpr-depth");
817     Res.push_back(llvm::utostr(Opts.ConstexprCallDepth));
818   }
819   if (!Opts.ObjCConstantStringClass.empty()) {
820     Res.push_back("-fconstant-string-class");
821     Res.push_back(Opts.ObjCConstantStringClass);
822   }
823   if (Opts.FakeAddressSpaceMap)
824     Res.push_back("-ffake-address-space-map");
825   if (Opts.ParseUnknownAnytype)
826     Res.push_back("-funknown-anytype");
827   if (Opts.DebuggerSupport)
828     Res.push_back("-fdebugger-support");
829   if (Opts.DebuggerCastResultToId)
830     Res.push_back("-fdebugger-cast-result-to-id");
831   if (Opts.DelayedTemplateParsing)
832     Res.push_back("-fdelayed-template-parsing");
833   if (Opts.Deprecated)
834     Res.push_back("-fdeprecated-macro");
835   if (Opts.ApplePragmaPack)
836     Res.push_back("-fapple-pragma-pack");
837   if (!Opts.CurrentModule.empty())
838     Res.push_back("-fmodule-name=" + Opts.CurrentModule);
839 }
840 
841 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
842                                    std::vector<std::string> &Res) {
843   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
844     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
845                   Opts.Macros[i].first);
846   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
847     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
848     Res.push_back("-include");
849     Res.push_back(Opts.Includes[i]);
850   }
851   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
852     Res.push_back("-imacros");
853     Res.push_back(Opts.MacroIncludes[i]);
854   }
855   if (!Opts.UsePredefines)
856     Res.push_back("-undef");
857   if (Opts.DetailedRecord)
858     Res.push_back("-detailed-preprocessing-record");
859   if (!Opts.ImplicitPCHInclude.empty()) {
860     Res.push_back("-include-pch");
861     Res.push_back(Opts.ImplicitPCHInclude);
862   }
863   if (!Opts.ImplicitPTHInclude.empty()) {
864     Res.push_back("-include-pth");
865     Res.push_back(Opts.ImplicitPTHInclude);
866   }
867   if (!Opts.TokenCache.empty()) {
868     if (Opts.ImplicitPTHInclude.empty()) {
869       Res.push_back("-token-cache");
870       Res.push_back(Opts.TokenCache);
871     } else
872       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
873              "Unsupported option combination!");
874   }
875   for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i) {
876     Res.push_back("-chain-include");
877     Res.push_back(Opts.ChainedIncludes[i]);
878   }
879   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
880     Res.push_back("-remap-file");
881     Res.push_back(Opts.RemappedFiles[i].first + ";" +
882                   Opts.RemappedFiles[i].second);
883   }
884 }
885 
886 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
887                                          std::vector<std::string> &Res) {
888   if (!Opts.ShowCPP && !Opts.ShowMacros)
889     llvm::report_fatal_error("Invalid option combination!");
890 
891   if (Opts.ShowCPP && Opts.ShowMacros)
892     Res.push_back("-dD");
893   else if (!Opts.ShowCPP && Opts.ShowMacros)
894     Res.push_back("-dM");
895 
896   if (!Opts.ShowLineMarkers)
897     Res.push_back("-P");
898   if (Opts.ShowComments)
899     Res.push_back("-C");
900   if (Opts.ShowMacroComments)
901     Res.push_back("-CC");
902 }
903 
904 static void TargetOptsToArgs(const TargetOptions &Opts,
905                              std::vector<std::string> &Res) {
906   Res.push_back("-triple");
907   Res.push_back(Opts.Triple);
908   if (!Opts.CPU.empty()) {
909     Res.push_back("-target-cpu");
910     Res.push_back(Opts.CPU);
911   }
912   if (!Opts.ABI.empty()) {
913     Res.push_back("-target-abi");
914     Res.push_back(Opts.ABI);
915   }
916   if (!Opts.LinkerVersion.empty()) {
917     Res.push_back("-target-linker-version");
918     Res.push_back(Opts.LinkerVersion);
919   }
920   if (!Opts.CXXABI.empty()) {
921     Res.push_back("-cxx-abi");
922     Res.push_back(Opts.CXXABI);
923   }
924   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
925     Res.push_back("-target-feature");
926     Res.push_back(Opts.Features[i]);
927   }
928 }
929 
930 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
931   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
932   CodeGenOptsToArgs(getCodeGenOpts(), Res);
933   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
934   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
935   FileSystemOptsToArgs(getFileSystemOpts(), Res);
936   FrontendOptsToArgs(getFrontendOpts(), Res);
937   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
938   LangOptsToArgs(*getLangOpts(), Res);
939   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
940   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
941   TargetOptsToArgs(getTargetOpts(), Res);
942 }
943 
944 //===----------------------------------------------------------------------===//
945 // Deserialization (to args)
946 //===----------------------------------------------------------------------===//
947 
948 using namespace clang::driver;
949 using namespace clang::driver::cc1options;
950 
951 //
952 
953 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
954                                      DiagnosticsEngine &Diags) {
955   unsigned DefaultOpt = 0;
956   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
957     DefaultOpt = 2;
958   // -Os/-Oz implies -O2
959   return (Args.hasArg(OPT_Os) || Args.hasArg (OPT_Oz)) ? 2 :
960     Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
961 }
962 
963 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
964                               DiagnosticsEngine &Diags) {
965   using namespace cc1options;
966   bool Success = true;
967   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
968     StringRef Name = A->getValue(Args);
969     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
970 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
971       .Case(CMDFLAG, NAME##Model)
972 #include "clang/Frontend/Analyses.def"
973       .Default(NumStores);
974     if (Value == NumStores) {
975       Diags.Report(diag::err_drv_invalid_value)
976         << A->getAsString(Args) << Name;
977       Success = false;
978     } else {
979       Opts.AnalysisStoreOpt = Value;
980     }
981   }
982 
983   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
984     StringRef Name = A->getValue(Args);
985     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
986 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
987       .Case(CMDFLAG, NAME##Model)
988 #include "clang/Frontend/Analyses.def"
989       .Default(NumConstraints);
990     if (Value == NumConstraints) {
991       Diags.Report(diag::err_drv_invalid_value)
992         << A->getAsString(Args) << Name;
993       Success = false;
994     } else {
995       Opts.AnalysisConstraintsOpt = Value;
996     }
997   }
998 
999   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1000     StringRef Name = A->getValue(Args);
1001     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1002 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1003       .Case(CMDFLAG, PD_##NAME)
1004 #include "clang/Frontend/Analyses.def"
1005       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1006     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1007       Diags.Report(diag::err_drv_invalid_value)
1008         << A->getAsString(Args) << Name;
1009       Success = false;
1010     } else {
1011       Opts.AnalysisDiagOpt = Value;
1012     }
1013   }
1014 
1015   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1016     StringRef Name = A->getValue(Args);
1017     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1018 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1019       .Case(CMDFLAG, NAME)
1020 #include "clang/Frontend/Analyses.def"
1021       .Default(NumPurgeModes);
1022     if (Value == NumPurgeModes) {
1023       Diags.Report(diag::err_drv_invalid_value)
1024         << A->getAsString(Args) << Name;
1025       Success = false;
1026     } else {
1027       Opts.AnalysisPurgeOpt = Value;
1028     }
1029   }
1030 
1031   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1032   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1033   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1034   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1035   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1036   Opts.AnalyzeNestedBlocks =
1037     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1038   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
1039   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1040   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1041   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
1042   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
1043   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1044   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1045   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1046   Opts.EagerlyTrimEGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1047   if (Args.hasArg(OPT_analyzer_inline_call))
1048     Opts.InlineCall = 1;
1049   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1050   Opts.InlineMaxStackDepth =
1051     Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1052                             Opts.InlineMaxStackDepth, Diags);
1053   Opts.InlineMaxFunctionSize =
1054     Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1055                             Opts.InlineMaxFunctionSize, Diags);
1056 
1057   Opts.CheckersControlList.clear();
1058   for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1059                                              OPT_analyzer_disable_checker),
1060          ie = Args.filtered_end(); it != ie; ++it) {
1061     const Arg *A = *it;
1062     A->claim();
1063     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1064     // We can have a list of comma separated checker names, e.g:
1065     // '-analyzer-checker=cocoa,unix'
1066     StringRef checkerList = A->getValue(Args);
1067     SmallVector<StringRef, 4> checkers;
1068     checkerList.split(checkers, ",");
1069     for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1070       Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1071   }
1072 
1073   return Success;
1074 }
1075 
1076 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1077   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1078   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1079   return true;
1080 }
1081 
1082 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1083                              DiagnosticsEngine &Diags) {
1084   using namespace cc1options;
1085   bool Success = true;
1086 
1087   unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1088   if (OptLevel > 3) {
1089     Diags.Report(diag::err_drv_invalid_value)
1090       << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1091     OptLevel = 3;
1092     Success = false;
1093   }
1094   Opts.OptimizationLevel = OptLevel;
1095 
1096   // We must always run at least the always inlining pass.
1097   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1098     : CodeGenOptions::OnlyAlwaysInlining;
1099 
1100   Opts.DebugInfo = Args.hasArg(OPT_g);
1101   Opts.LimitDebugInfo = !Args.hasArg(OPT_fno_limit_debug_info)
1102     || Args.hasArg(OPT_flimit_debug_info);
1103   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1104   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1105   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1106   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1107     OPT_fuse_register_sized_bitfield_access);
1108   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1109   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1110   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1111   Opts.NoCommon = Args.hasArg(OPT_fno_common);
1112   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1113   Opts.OptimizeSize = Args.hasArg(OPT_Os);
1114   Opts.OptimizeSize = Args.hasArg(OPT_Oz) ? 2 : Opts.OptimizeSize;
1115   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1116                             Args.hasArg(OPT_ffreestanding));
1117   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1118                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1119 
1120   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1121   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1122   Opts.ObjCRuntimeHasARC = Args.hasArg(OPT_fobjc_runtime_has_arc);
1123   Opts.ObjCRuntimeHasTerminate = Args.hasArg(OPT_fobjc_runtime_has_terminate);
1124   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1125   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1126   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1127   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1128   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1129   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1130   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1131   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1132   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1133   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1134   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1135   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1136                        Args.hasArg(OPT_cl_finite_math_only)||
1137                        Args.hasArg(OPT_cl_fast_relaxed_math));
1138   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1139                        Args.hasArg(OPT_cl_finite_math_only)||
1140                        Args.hasArg(OPT_cl_fast_relaxed_math));
1141   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1142   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1143   Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1144   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1145   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1146   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1147   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1148   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1149   Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1150   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1151   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1152   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1153                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1154                       Args.hasArg(OPT_cl_fast_relaxed_math);
1155   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1156   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1157   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1158 
1159   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1160   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1161 
1162   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1163   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1164 
1165   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1166   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1167   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1168   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1169   Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1170   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1171   Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1172   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1173   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1174     StringRef Val = A->getValue(Args);
1175     Val.getAsInteger(10, Opts.StackAlignment);
1176   }
1177 
1178   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1179     StringRef Name = A->getValue(Args);
1180     unsigned Method = llvm::StringSwitch<unsigned>(Name)
1181       .Case("legacy", CodeGenOptions::Legacy)
1182       .Case("non-legacy", CodeGenOptions::NonLegacy)
1183       .Case("mixed", CodeGenOptions::Mixed)
1184       .Default(~0U);
1185     if (Method == ~0U) {
1186       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1187       Success = false;
1188     } else {
1189       Opts.ObjCDispatchMethod = Method;
1190     }
1191   }
1192 
1193   return Success;
1194 }
1195 
1196 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1197                                       ArgList &Args) {
1198   using namespace cc1options;
1199   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1200   Opts.Targets = Args.getAllArgValues(OPT_MT);
1201   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1202   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1203   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1204   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1205   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1206   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1207 }
1208 
1209 static bool ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1210                                 DiagnosticsEngine &Diags) {
1211   using namespace cc1options;
1212   bool Success = true;
1213 
1214   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1215   Opts.DiagnosticSerializationFile =
1216     Args.getLastArgValue(OPT_diagnostic_serialized_file);
1217   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1218   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1219   Opts.Pedantic = Args.hasArg(OPT_pedantic);
1220   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1221   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1222   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1223   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1224                                  OPT_fno_show_column,
1225                                  /*Default=*/true);
1226   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1227   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1228   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1229 
1230   // Default behavior is to not to show note include stacks.
1231   Opts.ShowNoteIncludeStack = false;
1232   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1233                                OPT_fno_diagnostics_show_note_include_stack))
1234     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1235       Opts.ShowNoteIncludeStack = true;
1236 
1237   StringRef ShowOverloads =
1238     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1239   if (ShowOverloads == "best")
1240     Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1241   else if (ShowOverloads == "all")
1242     Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1243   else {
1244     Diags.Report(diag::err_drv_invalid_value)
1245       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1246       << ShowOverloads;
1247     Success = false;
1248   }
1249 
1250   StringRef ShowCategory =
1251     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1252   if (ShowCategory == "none")
1253     Opts.ShowCategories = 0;
1254   else if (ShowCategory == "id")
1255     Opts.ShowCategories = 1;
1256   else if (ShowCategory == "name")
1257     Opts.ShowCategories = 2;
1258   else {
1259     Diags.Report(diag::err_drv_invalid_value)
1260       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1261       << ShowCategory;
1262     Success = false;
1263   }
1264 
1265   StringRef Format =
1266     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1267   if (Format == "clang")
1268     Opts.Format = DiagnosticOptions::Clang;
1269   else if (Format == "msvc")
1270     Opts.Format = DiagnosticOptions::Msvc;
1271   else if (Format == "vi")
1272     Opts.Format = DiagnosticOptions::Vi;
1273   else {
1274     Diags.Report(diag::err_drv_invalid_value)
1275       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1276       << Format;
1277     Success = false;
1278   }
1279 
1280   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1281   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1282   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1283   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1284   Opts.MacroBacktraceLimit
1285     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1286                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1287   Opts.TemplateBacktraceLimit
1288     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1289                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
1290                          Diags);
1291   Opts.ConstexprBacktraceLimit
1292     = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1293                          DiagnosticOptions::DefaultConstexprBacktraceLimit,
1294                          Diags);
1295   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1296                                     DiagnosticOptions::DefaultTabStop, Diags);
1297   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1298     Diags.Report(diag::warn_ignoring_ftabstop_value)
1299       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1300     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1301   }
1302   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1303   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1304   Opts.Warnings = Args.getAllArgValues(OPT_W);
1305 
1306   return Success;
1307 }
1308 
1309 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1310   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1311 }
1312 
1313 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1314                                    DiagnosticsEngine &Diags) {
1315   using namespace cc1options;
1316   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1317   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1318     switch (A->getOption().getID()) {
1319     default:
1320       llvm_unreachable("Invalid option in group!");
1321     case OPT_ast_dump:
1322       Opts.ProgramAction = frontend::ASTDump; break;
1323     case OPT_ast_dump_xml:
1324       Opts.ProgramAction = frontend::ASTDumpXML; break;
1325     case OPT_ast_print:
1326       Opts.ProgramAction = frontend::ASTPrint; break;
1327     case OPT_ast_view:
1328       Opts.ProgramAction = frontend::ASTView; break;
1329     case OPT_dump_raw_tokens:
1330       Opts.ProgramAction = frontend::DumpRawTokens; break;
1331     case OPT_dump_tokens:
1332       Opts.ProgramAction = frontend::DumpTokens; break;
1333     case OPT_S:
1334       Opts.ProgramAction = frontend::EmitAssembly; break;
1335     case OPT_emit_llvm_bc:
1336       Opts.ProgramAction = frontend::EmitBC; break;
1337     case OPT_emit_html:
1338       Opts.ProgramAction = frontend::EmitHTML; break;
1339     case OPT_emit_llvm:
1340       Opts.ProgramAction = frontend::EmitLLVM; break;
1341     case OPT_emit_llvm_only:
1342       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1343     case OPT_emit_codegen_only:
1344       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1345     case OPT_emit_obj:
1346       Opts.ProgramAction = frontend::EmitObj; break;
1347     case OPT_fixit_EQ:
1348       Opts.FixItSuffix = A->getValue(Args);
1349       // fall-through!
1350     case OPT_fixit:
1351       Opts.ProgramAction = frontend::FixIt; break;
1352     case OPT_emit_module:
1353       Opts.ProgramAction = frontend::GenerateModule; break;
1354     case OPT_emit_pch:
1355       Opts.ProgramAction = frontend::GeneratePCH; break;
1356     case OPT_emit_pth:
1357       Opts.ProgramAction = frontend::GeneratePTH; break;
1358     case OPT_init_only:
1359       Opts.ProgramAction = frontend::InitOnly; break;
1360     case OPT_fsyntax_only:
1361       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1362     case OPT_print_decl_contexts:
1363       Opts.ProgramAction = frontend::PrintDeclContext; break;
1364     case OPT_print_preamble:
1365       Opts.ProgramAction = frontend::PrintPreamble; break;
1366     case OPT_E:
1367       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1368     case OPT_rewrite_macros:
1369       Opts.ProgramAction = frontend::RewriteMacros; break;
1370     case OPT_rewrite_objc:
1371       Opts.ProgramAction = frontend::RewriteObjC; break;
1372     case OPT_rewrite_test:
1373       Opts.ProgramAction = frontend::RewriteTest; break;
1374     case OPT_analyze:
1375       Opts.ProgramAction = frontend::RunAnalysis; break;
1376     case OPT_Eonly:
1377       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1378     }
1379   }
1380 
1381   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1382     Opts.Plugins.push_back(A->getValue(Args,0));
1383     Opts.ProgramAction = frontend::PluginAction;
1384     Opts.ActionName = A->getValue(Args);
1385 
1386     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1387            end = Args.filtered_end(); it != end; ++it) {
1388       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1389         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1390     }
1391   }
1392 
1393   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1394   Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1395   for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1396     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1397            end = Args.filtered_end(); it != end; ++it) {
1398       if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1399         Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1400     }
1401   }
1402 
1403   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1404     Opts.CodeCompletionAt =
1405       ParsedSourceLocation::FromString(A->getValue(Args));
1406     if (Opts.CodeCompletionAt.FileName.empty())
1407       Diags.Report(diag::err_drv_invalid_value)
1408         << A->getAsString(Args) << A->getValue(Args);
1409   }
1410   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1411 
1412   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1413   Opts.Plugins = Args.getAllArgValues(OPT_load);
1414   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1415   Opts.ShowHelp = Args.hasArg(OPT_help);
1416   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1417   Opts.ShowCodePatternsInCodeCompletion
1418     = Args.hasArg(OPT_code_completion_patterns);
1419   Opts.ShowGlobalSymbolsInCodeCompletion
1420     = !Args.hasArg(OPT_no_code_completion_globals);
1421   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1422   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1423   Opts.ShowVersion = Args.hasArg(OPT_version);
1424   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1425   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1426   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1427   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1428   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1429   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1430   Opts.OverrideRecordLayoutsFile
1431     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1432   Opts.ARCMTAction = FrontendOptions::ARCMT_None;
1433   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1434                                      OPT_arcmt_modify,
1435                                      OPT_arcmt_migrate)) {
1436     switch (A->getOption().getID()) {
1437     default:
1438       llvm_unreachable("missed a case");
1439     case OPT_arcmt_check:
1440       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1441       break;
1442     case OPT_arcmt_modify:
1443       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1444       break;
1445     case OPT_arcmt_migrate:
1446       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1447       break;
1448     }
1449   }
1450   Opts.ARCMTMigrateDir = Args.getLastArgValue(OPT_arcmt_migrate_directory);
1451   Opts.ARCMTMigrateReportOut
1452     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1453   Opts.ARCMTMigrateEmitARCErrors
1454     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1455 
1456   InputKind DashX = IK_None;
1457   if (const Arg *A = Args.getLastArg(OPT_x)) {
1458     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1459       .Case("c", IK_C)
1460       .Case("cl", IK_OpenCL)
1461       .Case("cuda", IK_CUDA)
1462       .Case("c++", IK_CXX)
1463       .Case("objective-c", IK_ObjC)
1464       .Case("objective-c++", IK_ObjCXX)
1465       .Case("cpp-output", IK_PreprocessedC)
1466       .Case("assembler-with-cpp", IK_Asm)
1467       .Case("c++-cpp-output", IK_PreprocessedCXX)
1468       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1469       .Case("objc-cpp-output", IK_PreprocessedObjC)
1470       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1471       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1472       .Case("c-header", IK_C)
1473       .Case("cl-header", IK_OpenCL)
1474       .Case("objective-c-header", IK_ObjC)
1475       .Case("c++-header", IK_CXX)
1476       .Case("objective-c++-header", IK_ObjCXX)
1477       .Case("ast", IK_AST)
1478       .Case("ir", IK_LLVM_IR)
1479       .Default(IK_None);
1480     if (DashX == IK_None)
1481       Diags.Report(diag::err_drv_invalid_value)
1482         << A->getAsString(Args) << A->getValue(Args);
1483   }
1484 
1485   // '-' is the default input if none is given.
1486   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1487   Opts.Inputs.clear();
1488   if (Inputs.empty())
1489     Inputs.push_back("-");
1490   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1491     InputKind IK = DashX;
1492     if (IK == IK_None) {
1493       IK = FrontendOptions::getInputKindForExtension(
1494         StringRef(Inputs[i]).rsplit('.').second);
1495       // FIXME: Remove this hack.
1496       if (i == 0)
1497         DashX = IK;
1498     }
1499     Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1500   }
1501 
1502   return DashX;
1503 }
1504 
1505 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1506                                                  void *MainAddr) {
1507   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1508 
1509   if (!P.isEmpty()) {
1510     P.eraseComponent();  // Remove /clang from foo/bin/clang
1511     P.eraseComponent();  // Remove /bin   from foo/bin
1512 
1513     // Get foo/lib/clang/<version>/include
1514     P.appendComponent("lib");
1515     P.appendComponent("clang");
1516     P.appendComponent(CLANG_VERSION_STRING);
1517   }
1518 
1519   return P.str();
1520 }
1521 
1522 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1523   using namespace cc1options;
1524   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1525   Opts.Verbose = Args.hasArg(OPT_v);
1526   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1527   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1528   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1529   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1530     Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1531   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1532   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1533   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1534 
1535   // Add -I..., -F..., and -index-header-map options in order.
1536   bool IsIndexHeaderMap = false;
1537   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1538                                              OPT_index_header_map),
1539        ie = Args.filtered_end(); it != ie; ++it) {
1540     if ((*it)->getOption().matches(OPT_index_header_map)) {
1541       // -index-header-map applies to the next -I or -F.
1542       IsIndexHeaderMap = true;
1543       continue;
1544     }
1545 
1546     frontend::IncludeDirGroup Group
1547       = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1548 
1549     Opts.AddPath((*it)->getValue(Args), Group, true,
1550                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1551     IsIndexHeaderMap = false;
1552   }
1553 
1554   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1555   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1556   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1557                                              OPT_iwithprefixbefore),
1558          ie = Args.filtered_end(); it != ie; ++it) {
1559     const Arg *A = *it;
1560     if (A->getOption().matches(OPT_iprefix))
1561       Prefix = A->getValue(Args);
1562     else if (A->getOption().matches(OPT_iwithprefix))
1563       Opts.AddPath(Prefix.str() + A->getValue(Args),
1564                    frontend::System, false, false, false);
1565     else
1566       Opts.AddPath(Prefix.str() + A->getValue(Args),
1567                    frontend::Angled, false, false, false);
1568   }
1569 
1570   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1571          ie = Args.filtered_end(); it != ie; ++it)
1572     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1573   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1574          ie = Args.filtered_end(); it != ie; ++it)
1575     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1576   for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1577          OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1578     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1579                  !(*it)->getOption().matches(OPT_iwithsysroot));
1580   for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1581          ie = Args.filtered_end(); it != ie; ++it)
1582     Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1583                  true);
1584 
1585   // Add the paths for the various language specific isystem flags.
1586   for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1587        ie = Args.filtered_end(); it != ie; ++it)
1588     Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1589   for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1590        ie = Args.filtered_end(); it != ie; ++it)
1591     Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1592   for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1593        ie = Args.filtered_end(); it != ie; ++it)
1594     Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1595   for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1596        ie = Args.filtered_end(); it != ie; ++it)
1597     Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1598                  true);
1599 
1600   // Add the internal paths from a driver that detects standard include paths.
1601   for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1602                                             OPT_internal_externc_isystem),
1603                     E = Args.filtered_end();
1604        I != E; ++I)
1605     Opts.AddPath((*I)->getValue(Args), frontend::System,
1606                  false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1607                  (*I)->getOption().matches(OPT_internal_externc_isystem));
1608 }
1609 
1610 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1611                                          LangStandard::Kind LangStd) {
1612   // Set some properties which depend solely on the input kind; it would be nice
1613   // to move these to the language standard, and have the driver resolve the
1614   // input kind + language standard.
1615   if (IK == IK_Asm) {
1616     Opts.AsmPreprocessor = 1;
1617   } else if (IK == IK_ObjC ||
1618              IK == IK_ObjCXX ||
1619              IK == IK_PreprocessedObjC ||
1620              IK == IK_PreprocessedObjCXX) {
1621     Opts.ObjC1 = Opts.ObjC2 = 1;
1622   }
1623 
1624   if (LangStd == LangStandard::lang_unspecified) {
1625     // Based on the base language, pick one.
1626     switch (IK) {
1627     case IK_None:
1628     case IK_AST:
1629     case IK_LLVM_IR:
1630       llvm_unreachable("Invalid input kind!");
1631     case IK_OpenCL:
1632       LangStd = LangStandard::lang_opencl;
1633       break;
1634     case IK_CUDA:
1635       LangStd = LangStandard::lang_cuda;
1636       break;
1637     case IK_Asm:
1638     case IK_C:
1639     case IK_PreprocessedC:
1640     case IK_ObjC:
1641     case IK_PreprocessedObjC:
1642       LangStd = LangStandard::lang_gnu99;
1643       break;
1644     case IK_CXX:
1645     case IK_PreprocessedCXX:
1646     case IK_ObjCXX:
1647     case IK_PreprocessedObjCXX:
1648       LangStd = LangStandard::lang_gnucxx98;
1649       break;
1650     }
1651   }
1652 
1653   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1654   Opts.BCPLComment = Std.hasBCPLComments();
1655   Opts.C99 = Std.isC99();
1656   Opts.C11 = Std.isC11();
1657   Opts.CPlusPlus = Std.isCPlusPlus();
1658   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1659   Opts.Digraphs = Std.hasDigraphs();
1660   Opts.GNUMode = Std.isGNUMode();
1661   Opts.GNUInline = !Std.isC99();
1662   Opts.HexFloats = Std.hasHexFloats();
1663   Opts.ImplicitInt = Std.hasImplicitInt();
1664 
1665   // OpenCL has some additional defaults.
1666   if (LangStd == LangStandard::lang_opencl) {
1667     Opts.OpenCL = 1;
1668     Opts.AltiVec = 0;
1669     Opts.CXXOperatorNames = 1;
1670     Opts.LaxVectorConversions = 0;
1671     Opts.DefaultFPContract = 1;
1672   }
1673 
1674   if (LangStd == LangStandard::lang_cuda)
1675     Opts.CUDA = 1;
1676 
1677   // OpenCL and C++ both have bool, true, false keywords.
1678   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1679 
1680   Opts.GNUKeywords = Opts.GNUMode;
1681   Opts.CXXOperatorNames = Opts.CPlusPlus;
1682 
1683   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1684   // is specified, or -std is set to a conforming mode.
1685   Opts.Trigraphs = !Opts.GNUMode;
1686 
1687   Opts.DollarIdents = !Opts.AsmPreprocessor;
1688 }
1689 
1690 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1691                           DiagnosticsEngine &Diags) {
1692   // FIXME: Cleanup per-file based stuff.
1693   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1694   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1695     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1696 #define LANGSTANDARD(id, name, desc, features) \
1697       .Case(name, LangStandard::lang_##id)
1698 #include "clang/Frontend/LangStandards.def"
1699       .Default(LangStandard::lang_unspecified);
1700     if (LangStd == LangStandard::lang_unspecified)
1701       Diags.Report(diag::err_drv_invalid_value)
1702         << A->getAsString(Args) << A->getValue(Args);
1703     else {
1704       // Valid standard, check to make sure language and standard are compatable.
1705       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1706       switch (IK) {
1707       case IK_C:
1708       case IK_ObjC:
1709       case IK_PreprocessedC:
1710       case IK_PreprocessedObjC:
1711         if (!(Std.isC89() || Std.isC99()))
1712           Diags.Report(diag::err_drv_argument_not_allowed_with)
1713             << A->getAsString(Args) << "C/ObjC";
1714         break;
1715       case IK_CXX:
1716       case IK_ObjCXX:
1717       case IK_PreprocessedCXX:
1718       case IK_PreprocessedObjCXX:
1719         if (!Std.isCPlusPlus())
1720           Diags.Report(diag::err_drv_argument_not_allowed_with)
1721             << A->getAsString(Args) << "C++/ObjC++";
1722         break;
1723       case IK_OpenCL:
1724         if (!Std.isC99())
1725           Diags.Report(diag::err_drv_argument_not_allowed_with)
1726             << A->getAsString(Args) << "OpenCL";
1727         break;
1728       case IK_CUDA:
1729         if (!Std.isCPlusPlus())
1730           Diags.Report(diag::err_drv_argument_not_allowed_with)
1731             << A->getAsString(Args) << "CUDA";
1732         break;
1733       default:
1734         break;
1735       }
1736     }
1737   }
1738 
1739   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1740     if (strcmp(A->getValue(Args), "CL1.1") != 0) {
1741       Diags.Report(diag::err_drv_invalid_value)
1742         << A->getAsString(Args) << A->getValue(Args);
1743     }
1744   }
1745 
1746   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1747 
1748   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1749   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1750   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1751   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1752   // name, as it doesn't seem a useful distinction.
1753   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1754                                   Opts.GNUKeywords);
1755 
1756   if (Args.hasArg(OPT_fno_operator_names))
1757     Opts.CXXOperatorNames = 0;
1758 
1759   if (Opts.ObjC1) {
1760     if (Args.hasArg(OPT_fobjc_gc_only))
1761       Opts.setGC(LangOptions::GCOnly);
1762     else if (Args.hasArg(OPT_fobjc_gc))
1763       Opts.setGC(LangOptions::HybridGC);
1764     else if (Args.hasArg(OPT_fobjc_arc)) {
1765       Opts.ObjCAutoRefCount = 1;
1766       if (Args.hasArg(OPT_fobjc_fragile_abi))
1767         Diags.Report(diag::err_arc_nonfragile_abi);
1768     }
1769 
1770     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1771       Opts.ObjCRuntimeHasWeak = 1;
1772 
1773     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1774       Opts.ObjCInferRelatedResultType = 0;
1775   }
1776 
1777   if (Args.hasArg(OPT_fgnu89_inline))
1778     Opts.GNUInline = 1;
1779 
1780   if (Args.hasArg(OPT_fapple_kext)) {
1781     if (!Opts.CPlusPlus)
1782       Diags.Report(diag::warn_c_kext);
1783     else
1784       Opts.AppleKext = 1;
1785   }
1786 
1787   if (Args.hasArg(OPT_print_ivar_layout))
1788     Opts.ObjCGCBitmapPrint = 1;
1789   if (Args.hasArg(OPT_fno_constant_cfstrings))
1790     Opts.NoConstantCFStrings = 1;
1791 
1792   if (Args.hasArg(OPT_faltivec))
1793     Opts.AltiVec = 1;
1794 
1795   if (Args.hasArg(OPT_pthread))
1796     Opts.POSIXThreads = 1;
1797 
1798   if (Args.hasArg(OPT_fdelayed_template_parsing))
1799     Opts.DelayedTemplateParsing = 1;
1800 
1801   StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1802   if (Vis == "default")
1803     Opts.setVisibilityMode(DefaultVisibility);
1804   else if (Vis == "hidden")
1805     Opts.setVisibilityMode(HiddenVisibility);
1806   else if (Vis == "protected")
1807     // FIXME: diagnose if target does not support protected visibility
1808     Opts.setVisibilityMode(ProtectedVisibility);
1809   else
1810     Diags.Report(diag::err_drv_invalid_value)
1811       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1812 
1813   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1814     Opts.InlineVisibilityHidden = 1;
1815 
1816   if (Args.hasArg(OPT_ftrapv)) {
1817     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1818     // Set the handler, if one is specified.
1819     Opts.OverflowHandler =
1820         Args.getLastArgValue(OPT_ftrapv_handler);
1821   }
1822   else if (Args.hasArg(OPT_fwrapv))
1823     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1824 
1825   if (Args.hasArg(OPT_trigraphs))
1826     Opts.Trigraphs = 1;
1827 
1828   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1829                                    OPT_fno_dollars_in_identifiers,
1830                                    Opts.DollarIdents);
1831   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1832   Opts.MicrosoftExt
1833     = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1834   Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1835   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1836   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1837   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1838   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1839                                    Opts.ConstStrings);
1840   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1841     Opts.LaxVectorConversions = 0;
1842   if (Args.hasArg(OPT_fno_threadsafe_statics))
1843     Opts.ThreadsafeStatics = 0;
1844   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1845   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1846   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1847   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1848   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1849 
1850   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1851   Opts.Blocks = Args.hasArg(OPT_fblocks);
1852   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1853   Opts.Modules = Args.hasArg(OPT_fmodules);
1854   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1855   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1856   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1857   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1858   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1859   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1860   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1861   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1862   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1863   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1864   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1865                                                     Diags);
1866   Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
1867                                                     Diags);
1868   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1869   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
1870                                                     0, Diags);
1871   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1872   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1873   Opts.ObjCConstantStringClass =
1874     Args.getLastArgValue(OPT_fconstant_string_class);
1875   Opts.ObjCNonFragileABI = !Args.hasArg(OPT_fobjc_fragile_abi);
1876   if (Opts.ObjCNonFragileABI)
1877     Opts.ObjCNonFragileABI2 = true;
1878   Opts.ObjCDefaultSynthProperties =
1879     Args.hasArg(OPT_fobjc_default_synthesize_properties);
1880   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1881   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1882   Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct, 0, Diags);
1883   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1884   Opts.Static = Args.hasArg(OPT_static_define);
1885   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
1886   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
1887                         || Args.hasArg(OPT_fdump_record_layouts);
1888   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1889   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1890   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1891   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1892   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1893   Opts.MRTD = Args.hasArg(OPT_mrtd);
1894   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
1895   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1896   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1897   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1898   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
1899   Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
1900   Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
1901   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1902   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1903 
1904   // Record whether the __DEPRECATED define was requested.
1905   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1906                                  OPT_fno_deprecated_macro,
1907                                  Opts.Deprecated);
1908 
1909   // FIXME: Eliminate this dependency.
1910   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
1911   Opts.Optimize = Opt != 0;
1912   Opts.OptimizeSize = Args.hasArg(OPT_Os) || Args.hasArg(OPT_Oz);
1913 
1914   // This is the __NO_INLINE__ define, which just depends on things like the
1915   // optimization level and -fno-inline, not actually whether the backend has
1916   // inlining enabled.
1917   //
1918   // FIXME: This is affected by other options (-fno-inline).
1919   Opts.NoInline = !Opt;
1920 
1921   Opts.FastMath = Args.hasArg(OPT_ffast_math);
1922 
1923   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1924   switch (SSP) {
1925   default:
1926     Diags.Report(diag::err_drv_invalid_value)
1927       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1928     break;
1929   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1930   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1931   case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1932   }
1933 }
1934 
1935 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1936                                   FileManager &FileMgr,
1937                                   DiagnosticsEngine &Diags) {
1938   using namespace cc1options;
1939   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1940   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1941   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1942       Opts.TokenCache = A->getValue(Args);
1943   else
1944     Opts.TokenCache = Opts.ImplicitPTHInclude;
1945   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1946   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1947   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1948 
1949   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1950   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1951          ie = Args.filtered_end(); it != ie; ++it) {
1952     const Arg *A = *it;
1953     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
1954   }
1955 
1956   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1957     StringRef Value(A->getValue(Args));
1958     size_t Comma = Value.find(',');
1959     unsigned Bytes = 0;
1960     unsigned EndOfLine = 0;
1961 
1962     if (Comma == StringRef::npos ||
1963         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1964         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1965       Diags.Report(diag::err_drv_preamble_format);
1966     else {
1967       Opts.PrecompiledPreambleBytes.first = Bytes;
1968       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1969     }
1970   }
1971 
1972   // Add macros from the command line.
1973   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1974          ie = Args.filtered_end(); it != ie; ++it) {
1975     if ((*it)->getOption().matches(OPT_D))
1976       Opts.addMacroDef((*it)->getValue(Args));
1977     else
1978       Opts.addMacroUndef((*it)->getValue(Args));
1979   }
1980 
1981   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1982 
1983   // Add the ordered list of -includes.
1984   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1985                                              OPT_include_pth),
1986          ie = Args.filtered_end(); it != ie; ++it) {
1987     const Arg *A = *it;
1988     // PCH is handled specially, we need to extra the original include path.
1989     if (A->getOption().matches(OPT_include_pch)) {
1990       std::string OriginalFile =
1991         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
1992       if (OriginalFile.empty())
1993         continue;
1994 
1995       Opts.Includes.push_back(OriginalFile);
1996     } else
1997       Opts.Includes.push_back(A->getValue(Args));
1998   }
1999 
2000   for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2001          ie = Args.filtered_end(); it != ie; ++it) {
2002     const Arg *A = *it;
2003     Opts.ChainedIncludes.push_back(A->getValue(Args));
2004   }
2005 
2006   // Include 'altivec.h' if -faltivec option present
2007   if (Args.hasArg(OPT_faltivec))
2008     Opts.Includes.push_back("altivec.h");
2009 
2010   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2011          ie = Args.filtered_end(); it != ie; ++it) {
2012     const Arg *A = *it;
2013     std::pair<StringRef,StringRef> Split =
2014       StringRef(A->getValue(Args)).split(';');
2015 
2016     if (Split.second.empty()) {
2017       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2018       continue;
2019     }
2020 
2021     Opts.addRemappedFile(Split.first, Split.second);
2022   }
2023 
2024   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2025     StringRef Name = A->getValue(Args);
2026     unsigned Library = llvm::StringSwitch<unsigned>(Name)
2027       .Case("libc++", ARCXX_libcxx)
2028       .Case("libstdc++", ARCXX_libstdcxx)
2029       .Case("none", ARCXX_nolib)
2030       .Default(~0U);
2031     if (Library == ~0U)
2032       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2033     else
2034       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2035   }
2036 }
2037 
2038 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2039                                         ArgList &Args) {
2040   using namespace cc1options;
2041   Opts.ShowCPP = !Args.hasArg(OPT_dM);
2042   Opts.ShowComments = Args.hasArg(OPT_C);
2043   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2044   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2045   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2046 }
2047 
2048 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2049   using namespace cc1options;
2050   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2051   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2052   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2053   Opts.Features = Args.getAllArgValues(OPT_target_feature);
2054   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2055   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2056 
2057   // Use the default target triple if unspecified.
2058   if (Opts.Triple.empty())
2059     Opts.Triple = llvm::sys::getDefaultTargetTriple();
2060 }
2061 
2062 //
2063 
2064 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2065                                         const char *const *ArgBegin,
2066                                         const char *const *ArgEnd,
2067                                         DiagnosticsEngine &Diags) {
2068   bool Success = true;
2069 
2070   // Parse the arguments.
2071   OwningPtr<OptTable> Opts(createCC1OptTable());
2072   unsigned MissingArgIndex, MissingArgCount;
2073   OwningPtr<InputArgList> Args(
2074     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2075 
2076   // Check for missing argument error.
2077   if (MissingArgCount) {
2078     Diags.Report(diag::err_drv_missing_argument)
2079       << Args->getArgString(MissingArgIndex) << MissingArgCount;
2080     Success = false;
2081   }
2082 
2083   // Issue errors on unknown arguments.
2084   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2085          ie = Args->filtered_end(); it != ie; ++it) {
2086     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2087     Success = false;
2088   }
2089 
2090   Success = ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags) && Success;
2091   Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2092   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2093   Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags)
2094             && Success;
2095   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2096   // FIXME: We shouldn't have to pass the DashX option around here
2097   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2098   Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2099             && Success;
2100   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2101   if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2102     ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2103     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2104       Res.getLangOpts()->ObjCExceptions = 1;
2105   }
2106   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2107   // PCH file and find the original header name. Remove the need to do that in
2108   // ParsePreprocessorArgs and remove the FileManager
2109   // parameters from the function and the "FileManager.h" #include.
2110   FileManager FileMgr(Res.getFileSystemOpts());
2111   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2112   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2113   ParseTargetArgs(Res.getTargetOpts(), *Args);
2114 
2115   return Success;
2116 }
2117 
2118 namespace {
2119 
2120   class ModuleSignature {
2121     llvm::SmallVector<uint64_t, 16> Data;
2122     unsigned CurBit;
2123     uint64_t CurValue;
2124 
2125   public:
2126     ModuleSignature() : CurBit(0), CurValue(0) { }
2127 
2128     void add(uint64_t Value, unsigned Bits);
2129     void add(StringRef Value);
2130     void flush();
2131 
2132     llvm::APInt getAsInteger() const;
2133   };
2134 }
2135 
2136 void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2137   CurValue |= Value << CurBit;
2138   if (CurBit + NumBits < 64) {
2139     CurBit += NumBits;
2140     return;
2141   }
2142 
2143   // Add the current word.
2144   Data.push_back(CurValue);
2145 
2146   if (CurBit)
2147     CurValue = Value >> (64-CurBit);
2148   else
2149     CurValue = 0;
2150   CurBit = (CurBit+NumBits) & 63;
2151 }
2152 
2153 void ModuleSignature::flush() {
2154   if (CurBit == 0)
2155     return;
2156 
2157   Data.push_back(CurValue);
2158   CurBit = 0;
2159   CurValue = 0;
2160 }
2161 
2162 void ModuleSignature::add(StringRef Value) {
2163   for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2164     add(*I, 8);
2165 }
2166 
2167 llvm::APInt ModuleSignature::getAsInteger() const {
2168   return llvm::APInt(Data.size() * 64, Data);
2169 }
2170 
2171 std::string CompilerInvocation::getModuleHash() const {
2172   ModuleSignature Signature;
2173 
2174   // Start the signature with the compiler version.
2175   Signature.add(getClangFullRepositoryVersion());
2176 
2177   // Extend the signature with the language options
2178 #define LANGOPT(Name, Bits, Default, Description) \
2179   Signature.add(LangOpts->Name, Bits);
2180 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2181   Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2182 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2183 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2184 #include "clang/Basic/LangOptions.def"
2185 
2186   // Extend the signature with the target triple
2187   llvm::Triple T(TargetOpts.Triple);
2188   Signature.add((unsigned)T.getArch(), 5);
2189   Signature.add((unsigned)T.getVendor(), 4);
2190   Signature.add((unsigned)T.getOS(), 5);
2191   Signature.add((unsigned)T.getEnvironment(), 4);
2192 
2193   // Extend the signature with preprocessor options.
2194   Signature.add(getPreprocessorOpts().UsePredefines, 1);
2195   Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2196 
2197   // Hash the preprocessor defines.
2198   // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2199   std::vector<StringRef> MacroDefs;
2200   for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2201             I = getPreprocessorOpts().Macros.begin(),
2202          IEnd = getPreprocessorOpts().Macros.end();
2203        I != IEnd; ++I) {
2204     if (!I->second)
2205       MacroDefs.push_back(I->first);
2206   }
2207   llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2208 
2209   unsigned PPHashResult = 0;
2210   for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2211     PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2212   Signature.add(PPHashResult, 32);
2213 
2214   // We've generated the signature. Treat it as one large APInt that we'll
2215   // encode in base-36 and return.
2216   Signature.flush();
2217   return Signature.getAsInteger().toString(36, /*Signed=*/false);
2218 }
2219