xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 8cf47df72f999b0adaeded4b2190978bc992ffc5)
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 CompilerInvocation::CompilerInvocation()
38   : LangOpts(new LangOptions()) {}
39 
40 void CompilerInvocation::setLangOpts(LangOptions *LOpts) {
41   LangOpts = LOpts;
42 }
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.DebugCompilationDir.empty()) {
150     Res.push_back("-fdebug-compilation-dir");
151     Res.push_back(Opts.DebugCompilationDir);
152   }
153   if (!Opts.DwarfDebugFlags.empty()) {
154     Res.push_back("-dwarf-debug-flags");
155     Res.push_back(Opts.DwarfDebugFlags);
156   }
157   if (Opts.AddressSanitizer)
158     Res.push_back("-faddress-sanitizer");
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   // SimplifyLibCalls is only derived.
189   // TimePasses is only derived.
190   // UnitAtATime is unused.
191   // Inlining is only derived.
192 
193   // UnrollLoops is derived, but also accepts an option, no
194   // harm in pushing it back here.
195   if (Opts.UnrollLoops)
196     Res.push_back("-funroll-loops");
197   if (Opts.DataSections)
198     Res.push_back("-fdata-sections");
199   if (Opts.FunctionSections)
200     Res.push_back("-ffunction-sections");
201   if (Opts.AsmVerbose)
202     Res.push_back("-masm-verbose");
203   if (!Opts.CodeModel.empty()) {
204     Res.push_back("-mcode-model");
205     Res.push_back(Opts.CodeModel);
206   }
207   if (Opts.CUDAIsDevice)
208     Res.push_back("-fcuda-is-device");
209   if (!Opts.CXAAtExit)
210     Res.push_back("-fno-use-cxa-atexit");
211   if (Opts.CXXCtorDtorAliases)
212     Res.push_back("-mconstructor-aliases");
213   if (Opts.ObjCAutoRefCountExceptions)
214     Res.push_back("-fobjc-arc-eh");
215   if (!Opts.DebugPass.empty()) {
216     Res.push_back("-mdebug-pass");
217     Res.push_back(Opts.DebugPass);
218   }
219   if (Opts.DisableFPElim)
220     Res.push_back("-mdisable-fp-elim");
221   if (!Opts.FloatABI.empty()) {
222     Res.push_back("-mfloat-abi");
223     Res.push_back(Opts.FloatABI);
224   }
225   if (!Opts.LimitFloatPrecision.empty()) {
226     Res.push_back("-mlimit-float-precision");
227     Res.push_back(Opts.LimitFloatPrecision);
228   }
229   if (Opts.NoZeroInitializedInBSS)
230     Res.push_back("-mno-zero-initialized-bss");
231   switch (Opts.getObjCDispatchMethod()) {
232   case CodeGenOptions::Legacy:
233     break;
234   case CodeGenOptions::Mixed:
235     Res.push_back("-fobjc-dispatch-method=mixed");
236     break;
237   case CodeGenOptions::NonLegacy:
238     Res.push_back("-fobjc-dispatch-method=non-legacy");
239     break;
240   }
241   if (Opts.NumRegisterParameters) {
242     Res.push_back("-mregparm");
243     Res.push_back(llvm::utostr(Opts.NumRegisterParameters));
244   }
245   if (Opts.NoGlobalMerge)
246     Res.push_back("-mno-global-merge");
247   if (Opts.NoExecStack)
248     Res.push_back("-mnoexecstack");
249   if (Opts.RelaxAll)
250     Res.push_back("-mrelax-all");
251   if (Opts.SaveTempLabels)
252     Res.push_back("-msave-temp-labels");
253   if (Opts.NoDwarf2CFIAsm)
254     Res.push_back("-fno-dwarf2-cfi-asm");
255   if (Opts.NoDwarfDirectoryAsm)
256     Res.push_back("-fno-dwarf-directory-asm");
257   if (Opts.SoftFloat)
258     Res.push_back("-msoft-float");
259   if (Opts.UnwindTables)
260     Res.push_back("-munwind-tables");
261   if (Opts.RelocationModel != "pic") {
262     Res.push_back("-mrelocation-model");
263     Res.push_back(Opts.RelocationModel);
264   }
265   if (!Opts.VerifyModule)
266     Res.push_back("-disable-llvm-verifier");
267   for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i) {
268     Res.push_back("-backend-option");
269     Res.push_back(Opts.BackendOptions[i]);
270   }
271 }
272 
273 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
274                                        std::vector<std::string> &Res) {
275   if (Opts.IncludeSystemHeaders)
276     Res.push_back("-sys-header-deps");
277   if (Opts.ShowHeaderIncludes)
278     Res.push_back("-H");
279   if (!Opts.HeaderIncludeOutputFile.empty()) {
280     Res.push_back("-header-include-file");
281     Res.push_back(Opts.HeaderIncludeOutputFile);
282   }
283   if (Opts.UsePhonyTargets)
284     Res.push_back("-MP");
285   if (!Opts.OutputFile.empty()) {
286     Res.push_back("-dependency-file");
287     Res.push_back(Opts.OutputFile);
288   }
289   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
290     Res.push_back("-MT");
291     Res.push_back(Opts.Targets[i]);
292   }
293 }
294 
295 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
296                                  std::vector<std::string> &Res) {
297   if (Opts.IgnoreWarnings)
298     Res.push_back("-w");
299   if (Opts.NoRewriteMacros)
300     Res.push_back("-Wno-rewrite-macros");
301   if (Opts.Pedantic)
302     Res.push_back("-pedantic");
303   if (Opts.PedanticErrors)
304     Res.push_back("-pedantic-errors");
305   if (!Opts.ShowColumn)
306     Res.push_back("-fno-show-column");
307   if (!Opts.ShowLocation)
308     Res.push_back("-fno-show-source-location");
309   if (!Opts.ShowCarets)
310     Res.push_back("-fno-caret-diagnostics");
311   if (!Opts.ShowFixits)
312     Res.push_back("-fno-diagnostics-fixit-info");
313   if (Opts.ShowSourceRanges)
314     Res.push_back("-fdiagnostics-print-source-range-info");
315   if (Opts.ShowParseableFixits)
316     Res.push_back("-fdiagnostics-parseable-fixits");
317   if (Opts.ShowColors)
318     Res.push_back("-fcolor-diagnostics");
319   if (Opts.VerifyDiagnostics)
320     Res.push_back("-verify");
321   if (Opts.ShowNames)
322     Res.push_back("-fdiagnostics-show-name");
323   if (Opts.ShowOptionNames)
324     Res.push_back("-fdiagnostics-show-option");
325   if (Opts.ShowCategories == 1)
326     Res.push_back("-fdiagnostics-show-category=id");
327   else if (Opts.ShowCategories == 2)
328     Res.push_back("-fdiagnostics-show-category=name");
329   switch (Opts.Format) {
330   case DiagnosticOptions::Clang:
331     Res.push_back("-fdiagnostics-format=clang"); break;
332   case DiagnosticOptions::Msvc:
333     Res.push_back("-fdiagnostics-format=msvc");  break;
334   case DiagnosticOptions::Vi:
335     Res.push_back("-fdiagnostics-format=vi");    break;
336   }
337   if (Opts.ErrorLimit) {
338     Res.push_back("-ferror-limit");
339     Res.push_back(llvm::utostr(Opts.ErrorLimit));
340   }
341   if (!Opts.DiagnosticLogFile.empty()) {
342     Res.push_back("-diagnostic-log-file");
343     Res.push_back(Opts.DiagnosticLogFile);
344   }
345   if (Opts.MacroBacktraceLimit
346                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
347     Res.push_back("-fmacro-backtrace-limit");
348     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
349   }
350   if (Opts.TemplateBacktraceLimit
351                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
352     Res.push_back("-ftemplate-backtrace-limit");
353     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
354   }
355 
356   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
357     Res.push_back("-ftabstop");
358     Res.push_back(llvm::utostr(Opts.TabStop));
359   }
360   if (Opts.MessageLength) {
361     Res.push_back("-fmessage-length");
362     Res.push_back(llvm::utostr(Opts.MessageLength));
363   }
364   if (!Opts.DumpBuildInformation.empty()) {
365     Res.push_back("-dump-build-information");
366     Res.push_back(Opts.DumpBuildInformation);
367   }
368   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
369     Res.push_back("-W" + Opts.Warnings[i]);
370 }
371 
372 static const char *getInputKindName(InputKind Kind) {
373   switch (Kind) {
374   case IK_None:              break;
375   case IK_AST:               return "ast";
376   case IK_Asm:               return "assembler-with-cpp";
377   case IK_C:                 return "c";
378   case IK_CXX:               return "c++";
379   case IK_LLVM_IR:           return "ir";
380   case IK_ObjC:              return "objective-c";
381   case IK_ObjCXX:            return "objective-c++";
382   case IK_OpenCL:            return "cl";
383   case IK_CUDA:              return "cuda";
384   case IK_PreprocessedC:     return "cpp-output";
385   case IK_PreprocessedCXX:   return "c++-cpp-output";
386   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
387   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
388   }
389 
390   llvm_unreachable("Unexpected language kind!");
391   return 0;
392 }
393 
394 static const char *getActionName(frontend::ActionKind Kind) {
395   switch (Kind) {
396   case frontend::PluginAction:
397     llvm_unreachable("Invalid kind!");
398 
399   case frontend::ASTDump:                return "-ast-dump";
400   case frontend::ASTDumpXML:             return "-ast-dump-xml";
401   case frontend::ASTPrint:               return "-ast-print";
402   case frontend::ASTView:                return "-ast-view";
403   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
404   case frontend::DumpTokens:             return "-dump-tokens";
405   case frontend::EmitAssembly:           return "-S";
406   case frontend::EmitBC:                 return "-emit-llvm-bc";
407   case frontend::EmitHTML:               return "-emit-html";
408   case frontend::EmitLLVM:               return "-emit-llvm";
409   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
410   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
411   case frontend::EmitObj:                return "-emit-obj";
412   case frontend::FixIt:                  return "-fixit";
413   case frontend::GenerateModule:         return "-emit-module";
414   case frontend::GenerateModuleFromMap:  return "-emit-module-from-map";
415   case frontend::GeneratePCH:            return "-emit-pch";
416   case frontend::GeneratePTH:            return "-emit-pth";
417   case frontend::InitOnly:               return "-init-only";
418   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
419   case frontend::PrintDeclContext:       return "-print-decl-contexts";
420   case frontend::PrintPreamble:          return "-print-preamble";
421   case frontend::PrintPreprocessedInput: return "-E";
422   case frontend::RewriteMacros:          return "-rewrite-macros";
423   case frontend::RewriteObjC:            return "-rewrite-objc";
424   case frontend::RewriteTest:            return "-rewrite-test";
425   case frontend::RunAnalysis:            return "-analyze";
426   case frontend::RunPreprocessorOnly:    return "-Eonly";
427   }
428 
429   llvm_unreachable("Unexpected language kind!");
430   return 0;
431 }
432 
433 static void FileSystemOptsToArgs(const FileSystemOptions &Opts,
434                                  std::vector<std::string> &Res) {
435   if (!Opts.WorkingDir.empty()) {
436     Res.push_back("-working-directory");
437     Res.push_back(Opts.WorkingDir);
438   }
439 }
440 
441 static void FrontendOptsToArgs(const FrontendOptions &Opts,
442                                std::vector<std::string> &Res) {
443   if (Opts.DisableFree)
444     Res.push_back("-disable-free");
445   if (Opts.RelocatablePCH)
446     Res.push_back("-relocatable-pch");
447   if (Opts.ShowHelp)
448     Res.push_back("-help");
449   if (Opts.ShowMacrosInCodeCompletion)
450     Res.push_back("-code-completion-macros");
451   if (Opts.ShowCodePatternsInCodeCompletion)
452     Res.push_back("-code-completion-patterns");
453   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
454     Res.push_back("-no-code-completion-globals");
455   if (Opts.ShowStats)
456     Res.push_back("-print-stats");
457   if (Opts.ShowTimers)
458     Res.push_back("-ftime-report");
459   if (Opts.ShowVersion)
460     Res.push_back("-version");
461   if (Opts.FixWhatYouCan)
462     Res.push_back("-fix-what-you-can");
463   switch (Opts.ARCMTAction) {
464   case FrontendOptions::ARCMT_None:
465     break;
466   case FrontendOptions::ARCMT_Check:
467     Res.push_back("-arcmt-check");
468     break;
469   case FrontendOptions::ARCMT_Modify:
470     Res.push_back("-arcmt-modify");
471     break;
472   case FrontendOptions::ARCMT_Migrate:
473     Res.push_back("-arcmt-migrate");
474     break;
475   }
476   if (!Opts.ARCMTMigrateDir.empty()) {
477     Res.push_back("-arcmt-migrate-directory");
478     Res.push_back(Opts.ARCMTMigrateDir);
479   }
480   if (!Opts.ARCMTMigrateReportOut.empty()) {
481     Res.push_back("-arcmt-migrate-report-output");
482     Res.push_back(Opts.ARCMTMigrateReportOut);
483   }
484   if (Opts.ARCMTMigrateEmitARCErrors)
485     Res.push_back("-arcmt-migrate-emit-errors");
486 
487   bool NeedLang = false;
488   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
489     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
490         Opts.Inputs[i].first)
491       NeedLang = true;
492   if (NeedLang) {
493     Res.push_back("-x");
494     Res.push_back(getInputKindName(Opts.Inputs[0].first));
495   }
496   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
497     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
498            "Unable to represent this input vector!");
499     Res.push_back(Opts.Inputs[i].second);
500   }
501 
502   if (!Opts.OutputFile.empty()) {
503     Res.push_back("-o");
504     Res.push_back(Opts.OutputFile);
505   }
506   if (!Opts.CodeCompletionAt.FileName.empty()) {
507     Res.push_back("-code-completion-at");
508     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
509                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
510                   llvm::utostr(Opts.CodeCompletionAt.Column));
511   }
512   if (Opts.ProgramAction != frontend::PluginAction)
513     Res.push_back(getActionName(Opts.ProgramAction));
514   if (!Opts.ActionName.empty()) {
515     Res.push_back("-plugin");
516     Res.push_back(Opts.ActionName);
517     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
518       Res.push_back("-plugin-arg-" + Opts.ActionName);
519       Res.push_back(Opts.PluginArgs[i]);
520     }
521   }
522   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
523     Res.push_back("-load");
524     Res.push_back(Opts.Plugins[i]);
525   }
526   for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
527     Res.push_back("-add-plugin");
528     Res.push_back(Opts.AddPluginActions[i]);
529     for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai) {
530       Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i]);
531       Res.push_back(Opts.AddPluginArgs[i][ai]);
532     }
533   }
534   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
535     Res.push_back("-ast-merge");
536     Res.push_back(Opts.ASTMergeFiles[i]);
537   }
538   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
539     Res.push_back("-mllvm");
540     Res.push_back(Opts.LLVMArgs[i]);
541   }
542 }
543 
544 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
545                                    std::vector<std::string> &Res) {
546   if (Opts.Sysroot != "/") {
547     Res.push_back("-isysroot");
548     Res.push_back(Opts.Sysroot);
549   }
550 
551   /// User specified include entries.
552   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
553     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
554     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
555       llvm::report_fatal_error("Invalid option set!");
556     if (E.IsUserSupplied) {
557       switch (E.Group) {
558       case frontend::After:
559         Res.push_back("-idirafter");
560         break;
561 
562       case frontend::Quoted:
563         Res.push_back("-iquote");
564         break;
565 
566       case frontend::System:
567         Res.push_back("-isystem");
568         break;
569 
570       case frontend::IndexHeaderMap:
571         Res.push_back("-index-header-map");
572         Res.push_back(E.IsFramework? "-F" : "-I");
573         break;
574 
575       case frontend::CSystem:
576         Res.push_back("-c-isystem");
577         break;
578 
579       case frontend::CXXSystem:
580         Res.push_back("-cxx-isystem");
581         break;
582 
583       case frontend::ObjCSystem:
584         Res.push_back("-objc-isystem");
585         break;
586 
587       case frontend::ObjCXXSystem:
588         Res.push_back("-objcxx-isystem");
589         break;
590 
591       case frontend::Angled:
592         Res.push_back(E.IsFramework ? "-F" : "-I");
593         break;
594       }
595     } else {
596       if (E.IsInternal) {
597         assert(E.Group == frontend::System && "Unexpected header search group");
598         if (E.ImplicitExternC)
599           Res.push_back("-internal-externc-isystem");
600         else
601           Res.push_back("-internal-isystem");
602       } else {
603         if (E.Group != frontend::Angled && E.Group != frontend::System)
604           llvm::report_fatal_error("Invalid option set!");
605         Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
606                       "-iwithprefix");
607       }
608     }
609     Res.push_back(E.Path);
610   }
611 
612   if (!Opts.ResourceDir.empty()) {
613     Res.push_back("-resource-dir");
614     Res.push_back(Opts.ResourceDir);
615   }
616   if (!Opts.ModuleCachePath.empty()) {
617     Res.push_back("-fmodule-cache-path");
618     Res.push_back(Opts.ModuleCachePath);
619   }
620   if (!Opts.UseStandardSystemIncludes)
621     Res.push_back("-nostdsysteminc");
622   if (!Opts.UseStandardCXXIncludes)
623     Res.push_back("-nostdinc++");
624   if (Opts.UseLibcxx)
625     Res.push_back("-stdlib=libc++");
626   if (Opts.Verbose)
627     Res.push_back("-v");
628 }
629 
630 static void LangOptsToArgs(const LangOptions &Opts,
631                            std::vector<std::string> &Res) {
632   LangOptions DefaultLangOpts;
633 
634   // FIXME: Need to set -std to get all the implicit options.
635 
636   // FIXME: We want to only pass options relative to the defaults, which
637   // requires constructing a target. :(
638   //
639   // It would be better to push the all target specific choices into the driver,
640   // so that everything below that was more uniform.
641 
642   if (Opts.Trigraphs)
643     Res.push_back("-trigraphs");
644   // Implicit based on the input kind:
645   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
646   // Implicit based on the input language standard:
647   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
648   if (Opts.DollarIdents)
649     Res.push_back("-fdollars-in-identifiers");
650   if (Opts.GNUMode && !Opts.GNUKeywords)
651     Res.push_back("-fno-gnu-keywords");
652   if (!Opts.GNUMode && Opts.GNUKeywords)
653     Res.push_back("-fgnu-keywords");
654   if (Opts.MicrosoftExt)
655     Res.push_back("-fms-extensions");
656   if (Opts.MicrosoftMode)
657     Res.push_back("-fms-compatibility");
658   if (Opts.MSCVersion != 0)
659     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
660   if (Opts.Borland)
661     Res.push_back("-fborland-extensions");
662   if (!Opts.ObjCNonFragileABI)
663     Res.push_back("-fobjc-fragile-abi");
664   if (Opts.ObjCDefaultSynthProperties)
665     Res.push_back("-fobjc-default-synthesize-properties");
666   // NoInline is implicit.
667   if (!Opts.CXXOperatorNames)
668     Res.push_back("-fno-operator-names");
669   if (Opts.PascalStrings)
670     Res.push_back("-fpascal-strings");
671   if (Opts.CatchUndefined)
672     Res.push_back("-fcatch-undefined-behavior");
673   if (Opts.WritableStrings)
674     Res.push_back("-fwritable-strings");
675   if (Opts.ConstStrings)
676     Res.push_back("-fconst-strings");
677   if (!Opts.LaxVectorConversions)
678     Res.push_back("-fno-lax-vector-conversions");
679   if (Opts.AltiVec)
680     Res.push_back("-faltivec");
681   if (Opts.Exceptions)
682     Res.push_back("-fexceptions");
683   if (Opts.ObjCExceptions)
684     Res.push_back("-fobjc-exceptions");
685   if (Opts.CXXExceptions)
686     Res.push_back("-fcxx-exceptions");
687   if (Opts.SjLjExceptions)
688     Res.push_back("-fsjlj-exceptions");
689   if (Opts.TraditionalCPP)
690     Res.push_back("-traditional-cpp");
691   if (!Opts.RTTI)
692     Res.push_back("-fno-rtti");
693   if (Opts.MSBitfields)
694     Res.push_back("-mms-bitfields");
695   if (!Opts.NeXTRuntime)
696     Res.push_back("-fgnu-runtime");
697   if (Opts.Freestanding)
698     Res.push_back("-ffreestanding");
699   if (Opts.NoBuiltin)
700     Res.push_back("-fno-builtin");
701   if (!Opts.AssumeSaneOperatorNew)
702     Res.push_back("-fno-assume-sane-operator-new");
703   if (!Opts.ThreadsafeStatics)
704     Res.push_back("-fno-threadsafe-statics");
705   if (Opts.POSIXThreads)
706     Res.push_back("-pthread");
707   if (Opts.Blocks)
708     Res.push_back("-fblocks");
709   if (Opts.BlocksRuntimeOptional)
710     Res.push_back("-fblocks-runtime-optional");
711   if (Opts.EmitAllDecls)
712     Res.push_back("-femit-all-decls");
713   if (Opts.MathErrno)
714     Res.push_back("-fmath-errno");
715   switch (Opts.getSignedOverflowBehavior()) {
716   case LangOptions::SOB_Undefined: break;
717   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
718   case LangOptions::SOB_Trapping:
719     Res.push_back("-ftrapv");
720     if (!Opts.OverflowHandler.empty()) {
721       Res.push_back("-ftrapv-handler");
722       Res.push_back(Opts.OverflowHandler);
723     }
724     break;
725   }
726   if (Opts.HeinousExtensions)
727     Res.push_back("-fheinous-gnu-extensions");
728   // Optimize is implicit.
729   // OptimizeSize is implicit.
730   if (Opts.Static)
731     Res.push_back("-static-define");
732   if (Opts.DumpRecordLayouts)
733     Res.push_back("-fdump-record-layouts");
734   if (Opts.DumpVTableLayouts)
735     Res.push_back("-fdump-vtable-layouts");
736   if (Opts.NoBitFieldTypeAlign)
737     Res.push_back("-fno-bitfield-type-alignment");
738   if (Opts.PICLevel) {
739     Res.push_back("-pic-level");
740     Res.push_back(llvm::utostr(Opts.PICLevel));
741   }
742   if (Opts.ObjCGCBitmapPrint)
743     Res.push_back("-print-ivar-layout");
744   if (Opts.NoConstantCFStrings)
745     Res.push_back("-fno-constant-cfstrings");
746   if (!Opts.AccessControl)
747     Res.push_back("-fno-access-control");
748   if (!Opts.CharIsSigned)
749     Res.push_back("-fno-signed-char");
750   if (Opts.ShortWChar)
751     Res.push_back("-fshort-wchar");
752   if (!Opts.ElideConstructors)
753     Res.push_back("-fno-elide-constructors");
754   if (Opts.getGC() != LangOptions::NonGC) {
755     if (Opts.getGC() == LangOptions::HybridGC) {
756       Res.push_back("-fobjc-gc");
757     } else {
758       assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
759       Res.push_back("-fobjc-gc-only");
760     }
761   }
762   if (Opts.ObjCAutoRefCount)
763     Res.push_back("-fobjc-arc");
764   if (Opts.ObjCRuntimeHasWeak)
765     Res.push_back("-fobjc-runtime-has-weak");
766   if (!Opts.ObjCInferRelatedResultType)
767     Res.push_back("-fno-objc-infer-related-result-type");
768 
769   if (Opts.AppleKext)
770     Res.push_back("-fapple-kext");
771 
772   if (Opts.getVisibilityMode() != DefaultVisibility) {
773     Res.push_back("-fvisibility");
774     if (Opts.getVisibilityMode() == HiddenVisibility) {
775       Res.push_back("hidden");
776     } else {
777       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
778              "Invalid visibility!");
779       Res.push_back("protected");
780     }
781   }
782   if (Opts.InlineVisibilityHidden)
783     Res.push_back("-fvisibility-inlines-hidden");
784 
785   if (Opts.getStackProtector() != 0) {
786     Res.push_back("-stack-protector");
787     Res.push_back(llvm::utostr(Opts.getStackProtector()));
788   }
789   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
790     Res.push_back("-ftemplate-depth");
791     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
792   }
793   if (!Opts.ObjCConstantStringClass.empty()) {
794     Res.push_back("-fconstant-string-class");
795     Res.push_back(Opts.ObjCConstantStringClass);
796   }
797   if (Opts.FakeAddressSpaceMap)
798     Res.push_back("-ffake-address-space-map");
799   if (Opts.ParseUnknownAnytype)
800     Res.push_back("-funknown-anytype");
801   if (Opts.DebuggerSupport)
802     Res.push_back("-fdebugger-support");
803   if (Opts.DelayedTemplateParsing)
804     Res.push_back("-fdelayed-template-parsing");
805   if (Opts.Deprecated)
806     Res.push_back("-fdeprecated-macro");
807   if (Opts.ApplePragmaPack)
808     Res.push_back("-fapple-pragma-pack");
809   if (!Opts.CurrentModule.empty())
810     Res.push_back("-fmodule-name=" + Opts.CurrentModule);
811 }
812 
813 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
814                                    std::vector<std::string> &Res) {
815   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
816     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
817                   Opts.Macros[i].first);
818   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
819     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
820     Res.push_back("-include");
821     Res.push_back(Opts.Includes[i]);
822   }
823   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
824     Res.push_back("-imacros");
825     Res.push_back(Opts.MacroIncludes[i]);
826   }
827   if (!Opts.UsePredefines)
828     Res.push_back("-undef");
829   if (Opts.DetailedRecord)
830     Res.push_back("-detailed-preprocessing-record");
831   if (!Opts.ImplicitPCHInclude.empty()) {
832     Res.push_back("-include-pch");
833     Res.push_back(Opts.ImplicitPCHInclude);
834   }
835   if (!Opts.ImplicitPTHInclude.empty()) {
836     Res.push_back("-include-pth");
837     Res.push_back(Opts.ImplicitPTHInclude);
838   }
839   if (!Opts.TokenCache.empty()) {
840     if (Opts.ImplicitPTHInclude.empty()) {
841       Res.push_back("-token-cache");
842       Res.push_back(Opts.TokenCache);
843     } else
844       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
845              "Unsupported option combination!");
846   }
847   for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i) {
848     Res.push_back("-chain-include");
849     Res.push_back(Opts.ChainedIncludes[i]);
850   }
851   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
852     Res.push_back("-remap-file");
853     Res.push_back(Opts.RemappedFiles[i].first + ";" +
854                   Opts.RemappedFiles[i].second);
855   }
856 }
857 
858 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
859                                          std::vector<std::string> &Res) {
860   if (!Opts.ShowCPP && !Opts.ShowMacros)
861     llvm::report_fatal_error("Invalid option combination!");
862 
863   if (Opts.ShowCPP && Opts.ShowMacros)
864     Res.push_back("-dD");
865   else if (!Opts.ShowCPP && Opts.ShowMacros)
866     Res.push_back("-dM");
867 
868   if (!Opts.ShowLineMarkers)
869     Res.push_back("-P");
870   if (Opts.ShowComments)
871     Res.push_back("-C");
872   if (Opts.ShowMacroComments)
873     Res.push_back("-CC");
874 }
875 
876 static void TargetOptsToArgs(const TargetOptions &Opts,
877                              std::vector<std::string> &Res) {
878   Res.push_back("-triple");
879   Res.push_back(Opts.Triple);
880   if (!Opts.CPU.empty()) {
881     Res.push_back("-target-cpu");
882     Res.push_back(Opts.CPU);
883   }
884   if (!Opts.ABI.empty()) {
885     Res.push_back("-target-abi");
886     Res.push_back(Opts.ABI);
887   }
888   if (!Opts.LinkerVersion.empty()) {
889     Res.push_back("-target-linker-version");
890     Res.push_back(Opts.LinkerVersion);
891   }
892   if (!Opts.CXXABI.empty()) {
893     Res.push_back("-cxx-abi");
894     Res.push_back(Opts.CXXABI);
895   }
896   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
897     Res.push_back("-target-feature");
898     Res.push_back(Opts.Features[i]);
899   }
900 }
901 
902 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
903   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
904   CodeGenOptsToArgs(getCodeGenOpts(), Res);
905   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
906   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
907   FileSystemOptsToArgs(getFileSystemOpts(), Res);
908   FrontendOptsToArgs(getFrontendOpts(), Res);
909   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
910   LangOptsToArgs(*getLangOpts(), Res);
911   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
912   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
913   TargetOptsToArgs(getTargetOpts(), Res);
914 }
915 
916 //===----------------------------------------------------------------------===//
917 // Deserialization (to args)
918 //===----------------------------------------------------------------------===//
919 
920 using namespace clang::driver;
921 using namespace clang::driver::cc1options;
922 
923 //
924 
925 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
926                                      DiagnosticsEngine &Diags) {
927   unsigned DefaultOpt = 0;
928   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
929     DefaultOpt = 2;
930   // -Os/-Oz implies -O2
931   return (Args.hasArg(OPT_Os) || Args.hasArg (OPT_Oz)) ? 2 :
932     Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
933 }
934 
935 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
936                               DiagnosticsEngine &Diags) {
937   using namespace cc1options;
938 
939   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
940     StringRef Name = A->getValue(Args);
941     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
942 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
943       .Case(CMDFLAG, NAME##Model)
944 #include "clang/Frontend/Analyses.def"
945       .Default(NumStores);
946     // FIXME: Error handling.
947     if (Value == NumStores)
948       Diags.Report(diag::err_drv_invalid_value)
949         << A->getAsString(Args) << Name;
950     else
951       Opts.AnalysisStoreOpt = Value;
952   }
953 
954   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
955     StringRef Name = A->getValue(Args);
956     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
957 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
958       .Case(CMDFLAG, NAME##Model)
959 #include "clang/Frontend/Analyses.def"
960       .Default(NumConstraints);
961     // FIXME: Error handling.
962     if (Value == NumConstraints)
963       Diags.Report(diag::err_drv_invalid_value)
964         << A->getAsString(Args) << Name;
965     else
966       Opts.AnalysisConstraintsOpt = Value;
967   }
968 
969   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
970     StringRef Name = A->getValue(Args);
971     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
972 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
973       .Case(CMDFLAG, PD_##NAME)
974 #include "clang/Frontend/Analyses.def"
975       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
976     // FIXME: Error handling.
977     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
978       Diags.Report(diag::err_drv_invalid_value)
979         << A->getAsString(Args) << Name;
980     else
981       Opts.AnalysisDiagOpt = Value;
982   }
983 
984   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
985     StringRef Name = A->getValue(Args);
986     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
987 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
988       .Case(CMDFLAG, NAME)
989 #include "clang/Frontend/Analyses.def"
990       .Default(NumPurgeModes);
991     // FIXME: Error handling.
992     if (Value == NumPurgeModes)
993       Diags.Report(diag::err_drv_invalid_value)
994         << A->getAsString(Args) << Name;
995     else
996       Opts.AnalysisPurgeOpt = Value;
997   }
998 
999   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1000   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1001   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1002   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1003   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1004   Opts.AnalyzeNestedBlocks =
1005     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1006   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
1007   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1008   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1009   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
1010   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
1011   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1012   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1013   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1014   Opts.EagerlyTrimEGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1015   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
1016 
1017   Opts.CheckersControlList.clear();
1018   for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1019                                              OPT_analyzer_disable_checker),
1020          ie = Args.filtered_end(); it != ie; ++it) {
1021     const Arg *A = *it;
1022     A->claim();
1023     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1024     // We can have a list of comma separated checker names, e.g:
1025     // '-analyzer-checker=cocoa,unix'
1026     StringRef checkerList = A->getValue(Args);
1027     SmallVector<StringRef, 4> checkers;
1028     checkerList.split(checkers, ",");
1029     for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1030       Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1031   }
1032 }
1033 
1034 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1035                              DiagnosticsEngine &Diags) {
1036   using namespace cc1options;
1037 
1038   Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
1039   if (Opts.OptimizationLevel > 3) {
1040     Diags.Report(diag::err_drv_invalid_value)
1041       << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
1042     Opts.OptimizationLevel = 3;
1043   }
1044 
1045   // We must always run at least the always inlining pass.
1046   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1047     : CodeGenOptions::OnlyAlwaysInlining;
1048 
1049   Opts.DebugInfo = Args.hasArg(OPT_g);
1050   Opts.LimitDebugInfo = !Args.hasArg(OPT_fno_limit_debug_info)
1051     || Args.hasArg(OPT_flimit_debug_info);
1052   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1053   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1054   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1055   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1056     OPT_fuse_register_sized_bitfield_access);
1057   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1058   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1059   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1060   Opts.NoCommon = Args.hasArg(OPT_fno_common);
1061   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1062   Opts.OptimizeSize = Args.hasArg(OPT_Os);
1063   Opts.OptimizeSize = Args.hasArg(OPT_Oz) ? 2 : Opts.OptimizeSize;
1064   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1065                             Args.hasArg(OPT_ffreestanding));
1066   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1067                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1068 
1069   Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
1070   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1071   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1072   Opts.ObjCRuntimeHasARC = Args.hasArg(OPT_fobjc_runtime_has_arc);
1073   Opts.ObjCRuntimeHasTerminate = Args.hasArg(OPT_fobjc_runtime_has_terminate);
1074   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1075   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1076   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1077   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1078   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1079   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1080   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1081   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1082   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1083   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1084   Opts.NoInfsFPMath = Opts.NoNaNsFPMath = Args.hasArg(OPT_cl_finite_math_only)||
1085                                           Args.hasArg(OPT_cl_fast_relaxed_math);
1086   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1087   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1088   Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1089   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1090   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1091   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1092   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1093   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1094   Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1095   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1096   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1097   Opts.UnsafeFPMath = Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1098                       Args.hasArg(OPT_cl_fast_relaxed_math);
1099   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1100   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1101 
1102   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1103   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1104 
1105   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1106   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1107 
1108   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1109   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1110   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1111   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1112   Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1113   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1114   Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1115 
1116   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1117     StringRef Name = A->getValue(Args);
1118     unsigned Method = llvm::StringSwitch<unsigned>(Name)
1119       .Case("legacy", CodeGenOptions::Legacy)
1120       .Case("non-legacy", CodeGenOptions::NonLegacy)
1121       .Case("mixed", CodeGenOptions::Mixed)
1122       .Default(~0U);
1123     if (Method == ~0U)
1124       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1125     else
1126       Opts.ObjCDispatchMethod = Method;
1127   }
1128 }
1129 
1130 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1131                                       ArgList &Args) {
1132   using namespace cc1options;
1133   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1134   Opts.Targets = Args.getAllArgValues(OPT_MT);
1135   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1136   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1137   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1138   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1139   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1140 }
1141 
1142 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1143                                 DiagnosticsEngine &Diags) {
1144   using namespace cc1options;
1145   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1146   Opts.DiagnosticSerializationFile =
1147     Args.getLastArgValue(OPT_diagnostic_serialized_file);
1148   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1149   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1150   Opts.Pedantic = Args.hasArg(OPT_pedantic);
1151   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1152   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1153   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1154   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1155                                  OPT_fno_show_column,
1156                                  /*Default=*/true);
1157   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1158   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1159   Opts.ShowNames = Args.hasArg(OPT_fdiagnostics_show_name);
1160   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1161 
1162   // Default behavior is to not to show note include stacks.
1163   Opts.ShowNoteIncludeStack = false;
1164   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1165                                OPT_fno_diagnostics_show_note_include_stack))
1166     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1167       Opts.ShowNoteIncludeStack = true;
1168 
1169   StringRef ShowOverloads =
1170     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1171   if (ShowOverloads == "best")
1172     Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1173   else if (ShowOverloads == "all")
1174     Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1175   else
1176     Diags.Report(diag::err_drv_invalid_value)
1177       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1178       << ShowOverloads;
1179 
1180   StringRef ShowCategory =
1181     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1182   if (ShowCategory == "none")
1183     Opts.ShowCategories = 0;
1184   else if (ShowCategory == "id")
1185     Opts.ShowCategories = 1;
1186   else if (ShowCategory == "name")
1187     Opts.ShowCategories = 2;
1188   else
1189     Diags.Report(diag::err_drv_invalid_value)
1190       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1191       << ShowCategory;
1192 
1193   StringRef Format =
1194     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1195   if (Format == "clang")
1196     Opts.Format = DiagnosticOptions::Clang;
1197   else if (Format == "msvc")
1198     Opts.Format = DiagnosticOptions::Msvc;
1199   else if (Format == "vi")
1200     Opts.Format = DiagnosticOptions::Vi;
1201   else
1202     Diags.Report(diag::err_drv_invalid_value)
1203       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1204       << Format;
1205 
1206   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1207   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1208   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1209   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1210   Opts.MacroBacktraceLimit
1211     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1212                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1213   Opts.TemplateBacktraceLimit
1214     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1215                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
1216                          Diags);
1217   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1218                                     DiagnosticOptions::DefaultTabStop, Diags);
1219   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1220     Diags.Report(diag::warn_ignoring_ftabstop_value)
1221       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1222     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1223   }
1224   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1225   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1226   Opts.Warnings = Args.getAllArgValues(OPT_W);
1227 }
1228 
1229 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1230   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1231 }
1232 
1233 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1234                                    DiagnosticsEngine &Diags) {
1235   using namespace cc1options;
1236   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1237   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1238     switch (A->getOption().getID()) {
1239     default:
1240       llvm_unreachable("Invalid option in group!");
1241     case OPT_ast_dump:
1242       Opts.ProgramAction = frontend::ASTDump; break;
1243     case OPT_ast_dump_xml:
1244       Opts.ProgramAction = frontend::ASTDumpXML; break;
1245     case OPT_ast_print:
1246       Opts.ProgramAction = frontend::ASTPrint; break;
1247     case OPT_ast_view:
1248       Opts.ProgramAction = frontend::ASTView; break;
1249     case OPT_dump_raw_tokens:
1250       Opts.ProgramAction = frontend::DumpRawTokens; break;
1251     case OPT_dump_tokens:
1252       Opts.ProgramAction = frontend::DumpTokens; break;
1253     case OPT_S:
1254       Opts.ProgramAction = frontend::EmitAssembly; break;
1255     case OPT_emit_llvm_bc:
1256       Opts.ProgramAction = frontend::EmitBC; break;
1257     case OPT_emit_html:
1258       Opts.ProgramAction = frontend::EmitHTML; break;
1259     case OPT_emit_llvm:
1260       Opts.ProgramAction = frontend::EmitLLVM; break;
1261     case OPT_emit_llvm_only:
1262       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1263     case OPT_emit_codegen_only:
1264       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1265     case OPT_emit_obj:
1266       Opts.ProgramAction = frontend::EmitObj; break;
1267     case OPT_fixit_EQ:
1268       Opts.FixItSuffix = A->getValue(Args);
1269       // fall-through!
1270     case OPT_fixit:
1271       Opts.ProgramAction = frontend::FixIt; break;
1272     case OPT_emit_module:
1273       Opts.ProgramAction = frontend::GenerateModule; break;
1274     case OPT_emit_module_from_map:
1275       Opts.ProgramAction = frontend::GenerateModuleFromMap; break;
1276     case OPT_emit_pch:
1277       Opts.ProgramAction = frontend::GeneratePCH; break;
1278     case OPT_emit_pth:
1279       Opts.ProgramAction = frontend::GeneratePTH; break;
1280     case OPT_init_only:
1281       Opts.ProgramAction = frontend::InitOnly; break;
1282     case OPT_fsyntax_only:
1283       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1284     case OPT_print_decl_contexts:
1285       Opts.ProgramAction = frontend::PrintDeclContext; break;
1286     case OPT_print_preamble:
1287       Opts.ProgramAction = frontend::PrintPreamble; break;
1288     case OPT_E:
1289       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1290     case OPT_rewrite_macros:
1291       Opts.ProgramAction = frontend::RewriteMacros; break;
1292     case OPT_rewrite_objc:
1293       Opts.ProgramAction = frontend::RewriteObjC; break;
1294     case OPT_rewrite_test:
1295       Opts.ProgramAction = frontend::RewriteTest; break;
1296     case OPT_analyze:
1297       Opts.ProgramAction = frontend::RunAnalysis; break;
1298     case OPT_Eonly:
1299       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1300     }
1301   }
1302 
1303   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1304     Opts.Plugins.push_back(A->getValue(Args,0));
1305     Opts.ProgramAction = frontend::PluginAction;
1306     Opts.ActionName = A->getValue(Args);
1307 
1308     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1309            end = Args.filtered_end(); it != end; ++it) {
1310       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1311         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1312     }
1313   }
1314 
1315   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1316   Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1317   for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1318     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1319            end = Args.filtered_end(); it != end; ++it) {
1320       if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1321         Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1322     }
1323   }
1324 
1325   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1326     Opts.CodeCompletionAt =
1327       ParsedSourceLocation::FromString(A->getValue(Args));
1328     if (Opts.CodeCompletionAt.FileName.empty())
1329       Diags.Report(diag::err_drv_invalid_value)
1330         << A->getAsString(Args) << A->getValue(Args);
1331   }
1332   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1333 
1334   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1335   Opts.Plugins = Args.getAllArgValues(OPT_load);
1336   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1337   Opts.ShowHelp = Args.hasArg(OPT_help);
1338   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1339   Opts.ShowCodePatternsInCodeCompletion
1340     = Args.hasArg(OPT_code_completion_patterns);
1341   Opts.ShowGlobalSymbolsInCodeCompletion
1342     = !Args.hasArg(OPT_no_code_completion_globals);
1343   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1344   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1345   Opts.ShowVersion = Args.hasArg(OPT_version);
1346   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1347   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1348   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1349 
1350   Opts.ARCMTAction = FrontendOptions::ARCMT_None;
1351   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1352                                      OPT_arcmt_modify,
1353                                      OPT_arcmt_migrate)) {
1354     switch (A->getOption().getID()) {
1355     default:
1356       llvm_unreachable("missed a case");
1357     case OPT_arcmt_check:
1358       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1359       break;
1360     case OPT_arcmt_modify:
1361       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1362       break;
1363     case OPT_arcmt_migrate:
1364       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1365       break;
1366     }
1367   }
1368   Opts.ARCMTMigrateDir = Args.getLastArgValue(OPT_arcmt_migrate_directory);
1369   Opts.ARCMTMigrateReportOut
1370     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1371   Opts.ARCMTMigrateEmitARCErrors
1372     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1373 
1374   InputKind DashX = IK_None;
1375   if (const Arg *A = Args.getLastArg(OPT_x)) {
1376     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1377       .Case("c", IK_C)
1378       .Case("cl", IK_OpenCL)
1379       .Case("cuda", IK_CUDA)
1380       .Case("c++", IK_CXX)
1381       .Case("objective-c", IK_ObjC)
1382       .Case("objective-c++", IK_ObjCXX)
1383       .Case("cpp-output", IK_PreprocessedC)
1384       .Case("assembler-with-cpp", IK_Asm)
1385       .Case("c++-cpp-output", IK_PreprocessedCXX)
1386       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1387       .Case("objc-cpp-output", IK_PreprocessedObjC)
1388       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1389       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1390       .Case("c-header", IK_C)
1391       .Case("cl-header", IK_OpenCL)
1392       .Case("objective-c-header", IK_ObjC)
1393       .Case("c++-header", IK_CXX)
1394       .Case("objective-c++-header", IK_ObjCXX)
1395       .Case("ast", IK_AST)
1396       .Case("ir", IK_LLVM_IR)
1397       .Default(IK_None);
1398     if (DashX == IK_None)
1399       Diags.Report(diag::err_drv_invalid_value)
1400         << A->getAsString(Args) << A->getValue(Args);
1401   }
1402 
1403   // '-' is the default input if none is given.
1404   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1405   Opts.Inputs.clear();
1406   if (Inputs.empty())
1407     Inputs.push_back("-");
1408   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1409     InputKind IK = DashX;
1410     if (IK == IK_None) {
1411       IK = FrontendOptions::getInputKindForExtension(
1412         StringRef(Inputs[i]).rsplit('.').second);
1413       // FIXME: Remove this hack.
1414       if (i == 0)
1415         DashX = IK;
1416     }
1417     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1418   }
1419 
1420   return DashX;
1421 }
1422 
1423 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1424                                                  void *MainAddr) {
1425   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1426 
1427   if (!P.isEmpty()) {
1428     P.eraseComponent();  // Remove /clang from foo/bin/clang
1429     P.eraseComponent();  // Remove /bin   from foo/bin
1430 
1431     // Get foo/lib/clang/<version>/include
1432     P.appendComponent("lib");
1433     P.appendComponent("clang");
1434     P.appendComponent(CLANG_VERSION_STRING);
1435   }
1436 
1437   return P.str();
1438 }
1439 
1440 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1441   using namespace cc1options;
1442   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1443   Opts.Verbose = Args.hasArg(OPT_v);
1444   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1445   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1446   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1447   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1448     Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1449   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1450   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1451   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1452 
1453   // Add -I..., -F..., and -index-header-map options in order.
1454   bool IsIndexHeaderMap = false;
1455   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1456                                              OPT_index_header_map),
1457        ie = Args.filtered_end(); it != ie; ++it) {
1458     if ((*it)->getOption().matches(OPT_index_header_map)) {
1459       // -index-header-map applies to the next -I or -F.
1460       IsIndexHeaderMap = true;
1461       continue;
1462     }
1463 
1464     frontend::IncludeDirGroup Group
1465       = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1466 
1467     Opts.AddPath((*it)->getValue(Args), Group, true,
1468                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1469     IsIndexHeaderMap = false;
1470   }
1471 
1472   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1473   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1474   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1475                                              OPT_iwithprefixbefore),
1476          ie = Args.filtered_end(); it != ie; ++it) {
1477     const Arg *A = *it;
1478     if (A->getOption().matches(OPT_iprefix))
1479       Prefix = A->getValue(Args);
1480     else if (A->getOption().matches(OPT_iwithprefix))
1481       Opts.AddPath(Prefix.str() + A->getValue(Args),
1482                    frontend::System, false, false, false);
1483     else
1484       Opts.AddPath(Prefix.str() + A->getValue(Args),
1485                    frontend::Angled, false, false, false);
1486   }
1487 
1488   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1489          ie = Args.filtered_end(); it != ie; ++it)
1490     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1491   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1492          ie = Args.filtered_end(); it != ie; ++it)
1493     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1494   for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1495          OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1496     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1497                  !(*it)->getOption().matches(OPT_iwithsysroot));
1498   for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1499          ie = Args.filtered_end(); it != ie; ++it)
1500     Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1501                  true);
1502 
1503   // Add the paths for the various language specific isystem flags.
1504   for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1505        ie = Args.filtered_end(); it != ie; ++it)
1506     Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1507   for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1508        ie = Args.filtered_end(); it != ie; ++it)
1509     Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1510   for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1511        ie = Args.filtered_end(); it != ie; ++it)
1512     Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1513   for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1514        ie = Args.filtered_end(); it != ie; ++it)
1515     Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1516                  true);
1517 
1518   // Add the internal paths from a driver that detects standard include paths.
1519   for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1520                                             OPT_internal_externc_isystem),
1521                     E = Args.filtered_end();
1522        I != E; ++I)
1523     Opts.AddPath((*I)->getValue(Args), frontend::System,
1524                  false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1525                  (*I)->getOption().matches(OPT_internal_externc_isystem));
1526 }
1527 
1528 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1529                                          LangStandard::Kind LangStd) {
1530   // Set some properties which depend solely on the input kind; it would be nice
1531   // to move these to the language standard, and have the driver resolve the
1532   // input kind + language standard.
1533   if (IK == IK_Asm) {
1534     Opts.AsmPreprocessor = 1;
1535   } else if (IK == IK_ObjC ||
1536              IK == IK_ObjCXX ||
1537              IK == IK_PreprocessedObjC ||
1538              IK == IK_PreprocessedObjCXX) {
1539     Opts.ObjC1 = Opts.ObjC2 = 1;
1540   }
1541 
1542   if (LangStd == LangStandard::lang_unspecified) {
1543     // Based on the base language, pick one.
1544     switch (IK) {
1545     case IK_None:
1546     case IK_AST:
1547     case IK_LLVM_IR:
1548       llvm_unreachable("Invalid input kind!");
1549     case IK_OpenCL:
1550       LangStd = LangStandard::lang_opencl;
1551       break;
1552     case IK_CUDA:
1553       LangStd = LangStandard::lang_cuda;
1554       break;
1555     case IK_Asm:
1556     case IK_C:
1557     case IK_PreprocessedC:
1558     case IK_ObjC:
1559     case IK_PreprocessedObjC:
1560       LangStd = LangStandard::lang_gnu99;
1561       break;
1562     case IK_CXX:
1563     case IK_PreprocessedCXX:
1564     case IK_ObjCXX:
1565     case IK_PreprocessedObjCXX:
1566       LangStd = LangStandard::lang_gnucxx98;
1567       break;
1568     }
1569   }
1570 
1571   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1572   Opts.BCPLComment = Std.hasBCPLComments();
1573   Opts.C99 = Std.isC99();
1574   Opts.C1X = Std.isC1X();
1575   Opts.CPlusPlus = Std.isCPlusPlus();
1576   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1577   Opts.Digraphs = Std.hasDigraphs();
1578   Opts.GNUMode = Std.isGNUMode();
1579   Opts.GNUInline = !Std.isC99();
1580   Opts.HexFloats = Std.hasHexFloats();
1581   Opts.ImplicitInt = Std.hasImplicitInt();
1582 
1583   // OpenCL has some additional defaults.
1584   if (LangStd == LangStandard::lang_opencl) {
1585     Opts.OpenCL = 1;
1586     Opts.AltiVec = 0;
1587     Opts.CXXOperatorNames = 1;
1588     Opts.LaxVectorConversions = 0;
1589     Opts.DefaultFPContract = 1;
1590   }
1591 
1592   if (LangStd == LangStandard::lang_cuda)
1593     Opts.CUDA = 1;
1594 
1595   // OpenCL and C++ both have bool, true, false keywords.
1596   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1597 
1598   Opts.GNUKeywords = Opts.GNUMode;
1599   Opts.CXXOperatorNames = Opts.CPlusPlus;
1600 
1601   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1602   // is specified, or -std is set to a conforming mode.
1603   Opts.Trigraphs = !Opts.GNUMode;
1604 
1605   Opts.DollarIdents = !Opts.AsmPreprocessor;
1606 }
1607 
1608 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1609                           DiagnosticsEngine &Diags) {
1610   // FIXME: Cleanup per-file based stuff.
1611   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1612   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1613     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1614 #define LANGSTANDARD(id, name, desc, features) \
1615       .Case(name, LangStandard::lang_##id)
1616 #include "clang/Frontend/LangStandards.def"
1617       .Default(LangStandard::lang_unspecified);
1618     if (LangStd == LangStandard::lang_unspecified)
1619       Diags.Report(diag::err_drv_invalid_value)
1620         << A->getAsString(Args) << A->getValue(Args);
1621     else {
1622       // Valid standard, check to make sure language and standard are compatable.
1623       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1624       switch (IK) {
1625       case IK_C:
1626       case IK_ObjC:
1627       case IK_PreprocessedC:
1628       case IK_PreprocessedObjC:
1629         if (!(Std.isC89() || Std.isC99()))
1630           Diags.Report(diag::err_drv_argument_not_allowed_with)
1631             << A->getAsString(Args) << "C/ObjC";
1632         break;
1633       case IK_CXX:
1634       case IK_ObjCXX:
1635       case IK_PreprocessedCXX:
1636       case IK_PreprocessedObjCXX:
1637         if (!Std.isCPlusPlus())
1638           Diags.Report(diag::err_drv_argument_not_allowed_with)
1639             << A->getAsString(Args) << "C++/ObjC++";
1640         break;
1641       case IK_OpenCL:
1642         if (!Std.isC99())
1643           Diags.Report(diag::err_drv_argument_not_allowed_with)
1644             << A->getAsString(Args) << "OpenCL";
1645         break;
1646       case IK_CUDA:
1647         if (!Std.isCPlusPlus())
1648           Diags.Report(diag::err_drv_argument_not_allowed_with)
1649             << A->getAsString(Args) << "CUDA";
1650         break;
1651       default:
1652         break;
1653       }
1654     }
1655   }
1656 
1657   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1658     if (strcmp(A->getValue(Args), "CL1.1") != 0) {
1659       Diags.Report(diag::err_drv_invalid_value)
1660         << A->getAsString(Args) << A->getValue(Args);
1661     }
1662   }
1663 
1664   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1665 
1666   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1667   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1668   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1669   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1670   // name, as it doesn't seem a useful distinction.
1671   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1672                                   Opts.GNUKeywords);
1673 
1674   if (Args.hasArg(OPT_fno_operator_names))
1675     Opts.CXXOperatorNames = 0;
1676 
1677   if (Opts.ObjC1) {
1678     if (Args.hasArg(OPT_fobjc_gc_only))
1679       Opts.setGC(LangOptions::GCOnly);
1680     else if (Args.hasArg(OPT_fobjc_gc))
1681       Opts.setGC(LangOptions::HybridGC);
1682     else if (Args.hasArg(OPT_fobjc_arc)) {
1683       Opts.ObjCAutoRefCount = 1;
1684       if (Args.hasArg(OPT_fobjc_fragile_abi))
1685         Diags.Report(diag::err_arc_nonfragile_abi);
1686     }
1687 
1688     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1689       Opts.ObjCRuntimeHasWeak = 1;
1690 
1691     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1692       Opts.ObjCInferRelatedResultType = 0;
1693   }
1694 
1695   if (Args.hasArg(OPT_fgnu89_inline))
1696     Opts.GNUInline = 1;
1697 
1698   if (Args.hasArg(OPT_fapple_kext)) {
1699     if (!Opts.CPlusPlus)
1700       Diags.Report(diag::warn_c_kext);
1701     else
1702       Opts.AppleKext = 1;
1703   }
1704 
1705   if (Args.hasArg(OPT_print_ivar_layout))
1706     Opts.ObjCGCBitmapPrint = 1;
1707   if (Args.hasArg(OPT_fno_constant_cfstrings))
1708     Opts.NoConstantCFStrings = 1;
1709 
1710   if (Args.hasArg(OPT_faltivec))
1711     Opts.AltiVec = 1;
1712 
1713   if (Args.hasArg(OPT_pthread))
1714     Opts.POSIXThreads = 1;
1715 
1716   if (Args.hasArg(OPT_fdelayed_template_parsing))
1717     Opts.DelayedTemplateParsing = 1;
1718 
1719   StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1720   if (Vis == "default")
1721     Opts.setVisibilityMode(DefaultVisibility);
1722   else if (Vis == "hidden")
1723     Opts.setVisibilityMode(HiddenVisibility);
1724   else if (Vis == "protected")
1725     Opts.setVisibilityMode(ProtectedVisibility);
1726   else
1727     Diags.Report(diag::err_drv_invalid_value)
1728       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1729 
1730   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1731     Opts.InlineVisibilityHidden = 1;
1732 
1733   if (Args.hasArg(OPT_ftrapv)) {
1734     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1735     // Set the handler, if one is specified.
1736     Opts.OverflowHandler =
1737         Args.getLastArgValue(OPT_ftrapv_handler);
1738   }
1739   else if (Args.hasArg(OPT_fwrapv))
1740     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1741 
1742   if (Args.hasArg(OPT_trigraphs))
1743     Opts.Trigraphs = 1;
1744 
1745   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1746                                    OPT_fno_dollars_in_identifiers,
1747                                    Opts.DollarIdents);
1748   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1749   Opts.MicrosoftExt
1750     = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1751   Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1752   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1753   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1754   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1755   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1756                                    Opts.ConstStrings);
1757   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1758     Opts.LaxVectorConversions = 0;
1759   if (Args.hasArg(OPT_fno_threadsafe_statics))
1760     Opts.ThreadsafeStatics = 0;
1761   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1762   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1763   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
1764   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1765   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
1766 
1767   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1768   Opts.Blocks = Args.hasArg(OPT_fblocks);
1769   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
1770   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1771   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1772   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1773   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1774   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1775   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1776   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1777   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1778   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1779   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1780   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1781                                                Diags);
1782   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
1783   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
1784                                                     0, Diags);
1785   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
1786   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1787   Opts.ObjCConstantStringClass =
1788     Args.getLastArgValue(OPT_fconstant_string_class);
1789   Opts.ObjCNonFragileABI = !Args.hasArg(OPT_fobjc_fragile_abi);
1790   if (Opts.ObjCNonFragileABI)
1791     Opts.ObjCNonFragileABI2 = true;
1792   Opts.ObjCDefaultSynthProperties =
1793     Args.hasArg(OPT_fobjc_default_synthesize_properties);
1794   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1795   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1796   Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct, 0, Diags);
1797   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1798   Opts.Static = Args.hasArg(OPT_static_define);
1799   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1800   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1801   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1802   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1803   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1804   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1805   Opts.OptimizeSize = 0;
1806   Opts.MRTD = Args.hasArg(OPT_mrtd);
1807   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
1808   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
1809   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
1810   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
1811   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
1812 
1813   // Record whether the __DEPRECATED define was requested.
1814   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
1815                                  OPT_fno_deprecated_macro,
1816                                  Opts.Deprecated);
1817 
1818   // FIXME: Eliminate this dependency.
1819   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
1820   Opts.Optimize = Opt != 0;
1821 
1822   // This is the __NO_INLINE__ define, which just depends on things like the
1823   // optimization level and -fno-inline, not actually whether the backend has
1824   // inlining enabled.
1825   //
1826   // FIXME: This is affected by other options (-fno-inline).
1827   Opts.NoInline = !Opt;
1828 
1829   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1830   switch (SSP) {
1831   default:
1832     Diags.Report(diag::err_drv_invalid_value)
1833       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1834     break;
1835   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
1836   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
1837   case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
1838   }
1839 }
1840 
1841 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1842                                   FileManager &FileMgr,
1843                                   DiagnosticsEngine &Diags) {
1844   using namespace cc1options;
1845   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1846   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1847   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1848       Opts.TokenCache = A->getValue(Args);
1849   else
1850     Opts.TokenCache = Opts.ImplicitPTHInclude;
1851   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1852   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1853   Opts.AutoModuleImport = Args.hasArg(OPT_fauto_module_import);
1854   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1855 
1856   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1857   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1858          ie = Args.filtered_end(); it != ie; ++it) {
1859     const Arg *A = *it;
1860     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
1861   }
1862 
1863   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1864     StringRef Value(A->getValue(Args));
1865     size_t Comma = Value.find(',');
1866     unsigned Bytes = 0;
1867     unsigned EndOfLine = 0;
1868 
1869     if (Comma == StringRef::npos ||
1870         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1871         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1872       Diags.Report(diag::err_drv_preamble_format);
1873     else {
1874       Opts.PrecompiledPreambleBytes.first = Bytes;
1875       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1876     }
1877   }
1878 
1879   // Add macros from the command line.
1880   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1881          ie = Args.filtered_end(); it != ie; ++it) {
1882     if ((*it)->getOption().matches(OPT_D))
1883       Opts.addMacroDef((*it)->getValue(Args));
1884     else
1885       Opts.addMacroUndef((*it)->getValue(Args));
1886   }
1887 
1888   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1889 
1890   // Add the ordered list of -includes.
1891   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1892                                              OPT_include_pth),
1893          ie = Args.filtered_end(); it != ie; ++it) {
1894     const Arg *A = *it;
1895     // PCH is handled specially, we need to extra the original include path.
1896     if (A->getOption().matches(OPT_include_pch)) {
1897       std::string OriginalFile =
1898         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
1899       if (OriginalFile.empty())
1900         continue;
1901 
1902       Opts.Includes.push_back(OriginalFile);
1903     } else
1904       Opts.Includes.push_back(A->getValue(Args));
1905   }
1906 
1907   for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
1908          ie = Args.filtered_end(); it != ie; ++it) {
1909     const Arg *A = *it;
1910     Opts.ChainedIncludes.push_back(A->getValue(Args));
1911   }
1912 
1913   // Include 'altivec.h' if -faltivec option present
1914   if (Args.hasArg(OPT_faltivec))
1915     Opts.Includes.push_back("altivec.h");
1916 
1917   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1918          ie = Args.filtered_end(); it != ie; ++it) {
1919     const Arg *A = *it;
1920     std::pair<StringRef,StringRef> Split =
1921       StringRef(A->getValue(Args)).split(';');
1922 
1923     if (Split.second.empty()) {
1924       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1925       continue;
1926     }
1927 
1928     Opts.addRemappedFile(Split.first, Split.second);
1929   }
1930 
1931   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
1932     StringRef Name = A->getValue(Args);
1933     unsigned Library = llvm::StringSwitch<unsigned>(Name)
1934       .Case("libc++", ARCXX_libcxx)
1935       .Case("libstdc++", ARCXX_libstdcxx)
1936       .Case("none", ARCXX_nolib)
1937       .Default(~0U);
1938     if (Library == ~0U)
1939       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1940     else
1941       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
1942   }
1943 }
1944 
1945 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1946                                         ArgList &Args) {
1947   using namespace cc1options;
1948   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1949   Opts.ShowComments = Args.hasArg(OPT_C);
1950   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1951   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1952   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1953 }
1954 
1955 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1956   using namespace cc1options;
1957   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1958   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1959   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1960   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1961   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1962   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1963 
1964   // Use the default target triple if unspecified.
1965   if (Opts.Triple.empty())
1966     Opts.Triple = llvm::sys::getDefaultTargetTriple();
1967 }
1968 
1969 //
1970 
1971 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1972                                         const char *const *ArgBegin,
1973                                         const char *const *ArgEnd,
1974                                         DiagnosticsEngine &Diags) {
1975   // Parse the arguments.
1976   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1977   unsigned MissingArgIndex, MissingArgCount;
1978   llvm::OwningPtr<InputArgList> Args(
1979     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1980 
1981   // Check for missing argument error.
1982   if (MissingArgCount)
1983     Diags.Report(diag::err_drv_missing_argument)
1984       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1985 
1986   // Issue errors on unknown arguments.
1987   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1988          ie = Args->filtered_end(); it != ie; ++it)
1989     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1990 
1991   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1992   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1993   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1994   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1995   // FIXME: We shouldn't have to pass the DashX option around here
1996   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1997   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags);
1998   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1999   if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2000     ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2001     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2002       Res.getLangOpts()->ObjCExceptions = 1;
2003   }
2004   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2005   // PCH file and find the original header name. Remove the need to do that in
2006   // ParsePreprocessorArgs and remove the FileManager
2007   // parameters from the function and the "FileManager.h" #include.
2008   FileManager FileMgr(Res.getFileSystemOpts());
2009   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2010   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2011   ParseTargetArgs(Res.getTargetOpts(), *Args);
2012 }
2013 
2014 namespace {
2015 
2016   class ModuleSignature {
2017     llvm::SmallVector<uint64_t, 16> Data;
2018     unsigned CurBit;
2019     uint64_t CurValue;
2020 
2021   public:
2022     ModuleSignature() : CurBit(0), CurValue(0) { }
2023 
2024     void add(uint64_t Value, unsigned Bits);
2025     void add(StringRef Value);
2026     void flush();
2027 
2028     llvm::APInt getAsInteger() const;
2029   };
2030 }
2031 
2032 void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2033   CurValue |= Value << CurBit;
2034   if (CurBit + NumBits < 64) {
2035     CurBit += NumBits;
2036     return;
2037   }
2038 
2039   // Add the current word.
2040   Data.push_back(CurValue);
2041 
2042   if (CurBit)
2043     CurValue = Value >> (64-CurBit);
2044   else
2045     CurValue = 0;
2046   CurBit = (CurBit+NumBits) & 63;
2047 }
2048 
2049 void ModuleSignature::flush() {
2050   if (CurBit == 0)
2051     return;
2052 
2053   Data.push_back(CurValue);
2054   CurBit = 0;
2055   CurValue = 0;
2056 }
2057 
2058 void ModuleSignature::add(StringRef Value) {
2059   for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2060     add(*I, 8);
2061 }
2062 
2063 llvm::APInt ModuleSignature::getAsInteger() const {
2064   return llvm::APInt(Data.size() * 64, Data);
2065 }
2066 
2067 std::string CompilerInvocation::getModuleHash() const {
2068   ModuleSignature Signature;
2069 
2070   // Start the signature with the compiler version.
2071   Signature.add(getClangFullRepositoryVersion());
2072 
2073   // Extend the signature with the language options
2074 #define LANGOPT(Name, Bits, Default, Description) \
2075   Signature.add(LangOpts->Name, Bits);
2076 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2077   Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2078 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2079 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2080 #include "clang/Basic/LangOptions.def"
2081 
2082   // Extend the signature with the target triple
2083   llvm::Triple T(TargetOpts.Triple);
2084   Signature.add((unsigned)T.getArch(), 5);
2085   Signature.add((unsigned)T.getVendor(), 4);
2086   Signature.add((unsigned)T.getOS(), 5);
2087   Signature.add((unsigned)T.getEnvironment(), 4);
2088 
2089   // Extend the signature with preprocessor options.
2090   Signature.add(getPreprocessorOpts().UsePredefines, 1);
2091   Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2092 
2093   // Hash the preprocessor defines.
2094   // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2095   std::vector<StringRef> MacroDefs;
2096   for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2097             I = getPreprocessorOpts().Macros.begin(),
2098          IEnd = getPreprocessorOpts().Macros.end();
2099        I != IEnd; ++I) {
2100     if (!I->second)
2101       MacroDefs.push_back(I->first);
2102   }
2103   llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2104 
2105   unsigned PPHashResult = 0;
2106   for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2107     PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2108   Signature.add(PPHashResult, 32);
2109 
2110   // We've generated the signature. Treat it as one large APInt that we'll
2111   // encode in base-36 and return.
2112   Signature.flush();
2113   return Signature.getAsInteger().toString(36, /*Signed=*/false);
2114 }
2115