xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision f60f6af9e84fe7752edb6fa42464778ac8a53e99)
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Driver/Arg.h"
15 #include "clang/Driver/ArgList.h"
16 #include "clang/Driver/Options.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/OptTable.h"
19 #include "clang/Driver/Option.h"
20 #include "clang/Frontend/CompilerInvocation.h"
21 #include "clang/Frontend/LangStandard.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/StringSwitch.h"
27 #include "llvm/ADT/Triple.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/Host.h"
30 #include "llvm/Support/Path.h"
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 purge mode!");
82 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
83   case NAME: return CMDFLAG;
84 #include "clang/Frontend/Analyses.def"
85   }
86 }
87 
88 static const char *getAnalysisIPAModeName(AnalysisIPAMode Kind) {
89   switch (Kind) {
90   default:
91     llvm_unreachable("Unknown analysis ipa mode!");
92 #define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
93   case NAME: return CMDFLAG;
94 #include "clang/Frontend/Analyses.def"
95   }
96 }
97 
98 static const char *
99   getAnalysisInliningModeName(AnalysisInliningMode Kind) {
100   switch (Kind) {
101   default:
102     llvm_unreachable("Unknown analysis inlining mode!");
103 #define ANALYSIS_INLINE_SELECTION(NAME, CMDFLAG, DESC) \
104   case NAME: return CMDFLAG;
105 #include "clang/Frontend/Analyses.def"
106   }
107 }
108 
109 //===----------------------------------------------------------------------===//
110 // Serialization (to args)
111 //===----------------------------------------------------------------------===//
112 
113 namespace {
114   /// ToArgsList - Helper class to create a list of std::strings.
115   class ToArgsList {
116     std::vector<std::string> &Res;
117   public:
118     explicit ToArgsList(std::vector<std::string> &Res) : Res(Res) {}
119 
120     void push_back(StringRef Str) {
121       // Avoid creating a temporary string.
122       Res.push_back(std::string());
123       Res.back().assign(Str.data(), Str.size());
124     }
125 
126     void push_back(StringRef Str1, StringRef Str2) {
127       push_back(Str1);
128       push_back(Str2);
129     }
130   };
131 }
132 
133 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts, ToArgsList &Res) {
134   if (Opts.ShowCheckerHelp)
135     Res.push_back("-analyzer-checker-help");
136   if (Opts.AnalysisStoreOpt != RegionStoreModel)
137     Res.push_back("-analyzer-store",
138                   getAnalysisStoreName(Opts.AnalysisStoreOpt));
139   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel)
140     Res.push_back("-analyzer-constraints",
141                   getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
142   if (Opts.AnalysisDiagOpt != PD_HTML)
143     Res.push_back("-analyzer-output",
144                   getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
145   if (Opts.AnalysisPurgeOpt != PurgeStmt)
146     Res.push_back("-analyzer-purge",
147                   getAnalysisPurgeModeName(Opts.AnalysisPurgeOpt));
148   if (!Opts.AnalyzeSpecificFunction.empty())
149     Res.push_back("-analyze-function", Opts.AnalyzeSpecificFunction);
150   if (Opts.IPAMode != Inlining)
151     Res.push_back("-analyzer-ipa", getAnalysisIPAModeName(Opts.IPAMode));
152   if (Opts.InliningMode != NoRedundancy)
153     Res.push_back("-analyzer-inlining-mode",
154                   getAnalysisInliningModeName(Opts.InliningMode));
155 
156   if (Opts.AnalyzeAll)
157     Res.push_back("-analyzer-opt-analyze-headers");
158   if (Opts.AnalyzerDisplayProgress)
159     Res.push_back("-analyzer-display-progress");
160   if (Opts.AnalyzeNestedBlocks)
161     Res.push_back("-analyzer-opt-analyze-nested-blocks");
162   if (Opts.EagerlyAssume)
163     Res.push_back("-analyzer-eagerly-assume");
164   if (Opts.TrimGraph)
165     Res.push_back("-trim-egraph");
166   if (Opts.VisualizeEGDot)
167     Res.push_back("-analyzer-viz-egraph-graphviz");
168   if (Opts.VisualizeEGUbi)
169     Res.push_back("-analyzer-viz-egraph-ubigraph");
170   if (Opts.NoRetryExhausted)
171     Res.push_back("-analyzer-disable-retry-exhausted");
172 
173   for (unsigned i = 0, e = Opts.CheckersControlList.size(); i != e; ++i) {
174     const std::pair<std::string, bool> &opt = Opts.CheckersControlList[i];
175     if (opt.second)
176       Res.push_back("-analyzer-disable-checker");
177     else
178       Res.push_back("-analyzer-checker");
179     Res.push_back(opt.first);
180   }
181 }
182 
183 static void CodeGenOptsToArgs(const CodeGenOptions &Opts, ToArgsList &Res) {
184   switch (Opts.DebugInfo) {
185     case CodeGenOptions::NoDebugInfo:
186       break;
187     case CodeGenOptions::DebugLineTablesOnly:
188       Res.push_back("-gline-tables-only");
189       break;
190     case CodeGenOptions::LimitedDebugInfo:
191       Res.push_back("-g");
192       Res.push_back("-flimit-debug-info");
193       break;
194     case CodeGenOptions::FullDebugInfo:
195       Res.push_back("-g");
196       Res.push_back("-fno-limit-debug-info");
197       break;
198   }
199   if (Opts.DisableLLVMOpts)
200     Res.push_back("-disable-llvm-optzns");
201   if (Opts.DisableRedZone)
202     Res.push_back("-disable-red-zone");
203   if (Opts.DisableTailCalls)
204     Res.push_back("-mdisable-tail-calls");
205   if (!Opts.DebugCompilationDir.empty())
206     Res.push_back("-fdebug-compilation-dir", Opts.DebugCompilationDir);
207   if (!Opts.DwarfDebugFlags.empty())
208     Res.push_back("-dwarf-debug-flags", Opts.DwarfDebugFlags);
209   if (Opts.EmitGcovArcs)
210     Res.push_back("-femit-coverage-data");
211   if (Opts.EmitGcovNotes)
212     Res.push_back("-femit-coverage-notes");
213   if (!Opts.MergeAllConstants)
214     Res.push_back("-fno-merge-all-constants");
215   if (Opts.NoCommon)
216     Res.push_back("-fno-common");
217   if (Opts.ForbidGuardVariables)
218     Res.push_back("-fforbid-guard-variables");
219   if (Opts.UseRegisterSizedBitfieldAccess)
220     Res.push_back("-fuse-register-sized-bitfield-access");
221   if (Opts.NoImplicitFloat)
222     Res.push_back("-no-implicit-float");
223   if (Opts.OmitLeafFramePointer)
224     Res.push_back("-momit-leaf-frame-pointer");
225   if (Opts.OptimizeSize) {
226     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
227     Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
228   } else if (Opts.OptimizationLevel != 0)
229     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
230   if (!Opts.MainFileName.empty())
231     Res.push_back("-main-file-name", Opts.MainFileName);
232   if (Opts.NoInfsFPMath)
233     Res.push_back("-menable-no-infinities");
234   if (Opts.NoNaNsFPMath)
235     Res.push_back("-menable-no-nans");
236   // SimplifyLibCalls is only derived.
237   // TimePasses is only derived.
238   // UnitAtATime is unused.
239   // Inlining is only derived.
240 
241   // UnrollLoops is derived, but also accepts an option, no
242   // harm in pushing it back here.
243   if (Opts.UnrollLoops)
244     Res.push_back("-funroll-loops");
245   if (Opts.DataSections)
246     Res.push_back("-fdata-sections");
247   if (Opts.FunctionSections)
248     Res.push_back("-ffunction-sections");
249   if (Opts.AsmVerbose)
250     Res.push_back("-masm-verbose");
251   if (!Opts.CodeModel.empty())
252     Res.push_back("-mcode-model", Opts.CodeModel);
253   if (Opts.CUDAIsDevice)
254     Res.push_back("-fcuda-is-device");
255   if (!Opts.CXAAtExit)
256     Res.push_back("-fno-use-cxa-atexit");
257   if (Opts.CXXCtorDtorAliases)
258     Res.push_back("-mconstructor-aliases");
259   if (Opts.ObjCAutoRefCountExceptions)
260     Res.push_back("-fobjc-arc-eh");
261   if (!Opts.DebugPass.empty()) {
262     Res.push_back("-mdebug-pass", Opts.DebugPass);
263   }
264   if (Opts.DisableFPElim)
265     Res.push_back("-mdisable-fp-elim");
266   if (!Opts.FloatABI.empty())
267     Res.push_back("-mfloat-abi", Opts.FloatABI);
268   if (!Opts.LimitFloatPrecision.empty())
269     Res.push_back("-mlimit-float-precision", Opts.LimitFloatPrecision);
270   if (Opts.NoZeroInitializedInBSS)
271     Res.push_back("-mno-zero-initialized-bss");
272   switch (Opts.getObjCDispatchMethod()) {
273   case CodeGenOptions::Legacy:
274     break;
275   case CodeGenOptions::Mixed:
276     Res.push_back("-fobjc-dispatch-method=mixed");
277     break;
278   case CodeGenOptions::NonLegacy:
279     Res.push_back("-fobjc-dispatch-method=non-legacy");
280     break;
281   }
282   if (Opts.BoundsChecking > 0)
283     Res.push_back("-fbounds-checking=" + llvm::utostr(Opts.BoundsChecking));
284   if (Opts.NumRegisterParameters)
285     Res.push_back("-mregparm", llvm::utostr(Opts.NumRegisterParameters));
286   if (Opts.NoGlobalMerge)
287     Res.push_back("-mno-global-merge");
288   if (Opts.NoExecStack)
289     Res.push_back("-mnoexecstack");
290   if (Opts.RelaxAll)
291     Res.push_back("-mrelax-all");
292   if (Opts.SaveTempLabels)
293     Res.push_back("-msave-temp-labels");
294   if (Opts.NoDwarf2CFIAsm)
295     Res.push_back("-fno-dwarf2-cfi-asm");
296   if (Opts.NoDwarfDirectoryAsm)
297     Res.push_back("-fno-dwarf-directory-asm");
298   if (Opts.SoftFloat)
299     Res.push_back("-msoft-float");
300   if (Opts.StrictEnums)
301     Res.push_back("-fstrict-enums");
302   if (Opts.UnwindTables)
303     Res.push_back("-munwind-tables");
304   if (Opts.RelocationModel != "pic")
305     Res.push_back("-mrelocation-model", Opts.RelocationModel);
306   if (!Opts.VerifyModule)
307     Res.push_back("-disable-llvm-verifier");
308   for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i)
309     Res.push_back("-backend-option", Opts.BackendOptions[i]);
310 
311   switch (Opts.DefaultTLSModel) {
312   case CodeGenOptions::GeneralDynamicTLSModel:
313     break;
314   case CodeGenOptions::LocalDynamicTLSModel:
315     Res.push_back("-ftls-model=local-dynamic");
316     break;
317   case CodeGenOptions::InitialExecTLSModel:
318     Res.push_back("-ftls-model=initial-exec");
319     break;
320   case CodeGenOptions::LocalExecTLSModel:
321     Res.push_back("-ftls-model=local-exec");
322     break;
323   }
324 }
325 
326 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
327                                        ToArgsList &Res) {
328   if (Opts.IncludeSystemHeaders)
329     Res.push_back("-sys-header-deps");
330   if (Opts.ShowHeaderIncludes)
331     Res.push_back("-H");
332   if (!Opts.HeaderIncludeOutputFile.empty())
333     Res.push_back("-header-include-file", Opts.HeaderIncludeOutputFile);
334   if (Opts.UsePhonyTargets)
335     Res.push_back("-MP");
336   if (!Opts.OutputFile.empty())
337     Res.push_back("-dependency-file", Opts.OutputFile);
338   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i)
339     Res.push_back("-MT", Opts.Targets[i]);
340 }
341 
342 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
343                                  ToArgsList &Res) {
344   if (Opts.IgnoreWarnings)
345     Res.push_back("-w");
346   if (Opts.NoRewriteMacros)
347     Res.push_back("-Wno-rewrite-macros");
348   if (Opts.Pedantic)
349     Res.push_back("-pedantic");
350   if (Opts.PedanticErrors)
351     Res.push_back("-pedantic-errors");
352   if (!Opts.ShowColumn)
353     Res.push_back("-fno-show-column");
354   if (!Opts.ShowLocation)
355     Res.push_back("-fno-show-source-location");
356   if (!Opts.ShowCarets)
357     Res.push_back("-fno-caret-diagnostics");
358   if (!Opts.ShowFixits)
359     Res.push_back("-fno-diagnostics-fixit-info");
360   if (Opts.ShowSourceRanges)
361     Res.push_back("-fdiagnostics-print-source-range-info");
362   if (Opts.ShowParseableFixits)
363     Res.push_back("-fdiagnostics-parseable-fixits");
364   if (Opts.ShowColors)
365     Res.push_back("-fcolor-diagnostics");
366   if (Opts.VerifyDiagnostics)
367     Res.push_back("-verify");
368   if (Opts.ShowOptionNames)
369     Res.push_back("-fdiagnostics-show-option");
370   if (Opts.ShowCategories == 1)
371     Res.push_back("-fdiagnostics-show-category=id");
372   else if (Opts.ShowCategories == 2)
373     Res.push_back("-fdiagnostics-show-category=name");
374   switch (Opts.Format) {
375   case DiagnosticOptions::Clang:
376     Res.push_back("-fdiagnostics-format=clang"); break;
377   case DiagnosticOptions::Msvc:
378     Res.push_back("-fdiagnostics-format=msvc");  break;
379   case DiagnosticOptions::Vi:
380     Res.push_back("-fdiagnostics-format=vi");    break;
381   }
382   if (Opts.ErrorLimit)
383     Res.push_back("-ferror-limit", llvm::utostr(Opts.ErrorLimit));
384   if (!Opts.DiagnosticLogFile.empty())
385     Res.push_back("-diagnostic-log-file", Opts.DiagnosticLogFile);
386   if (Opts.MacroBacktraceLimit
387                         != DiagnosticOptions::DefaultMacroBacktraceLimit)
388     Res.push_back("-fmacro-backtrace-limit",
389                   llvm::utostr(Opts.MacroBacktraceLimit));
390   if (Opts.TemplateBacktraceLimit
391                         != DiagnosticOptions::DefaultTemplateBacktraceLimit)
392     Res.push_back("-ftemplate-backtrace-limit",
393                   llvm::utostr(Opts.TemplateBacktraceLimit));
394   if (Opts.ConstexprBacktraceLimit
395                         != DiagnosticOptions::DefaultConstexprBacktraceLimit)
396     Res.push_back("-fconstexpr-backtrace-limit",
397                   llvm::utostr(Opts.ConstexprBacktraceLimit));
398 
399   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop)
400     Res.push_back("-ftabstop", llvm::utostr(Opts.TabStop));
401   if (Opts.MessageLength)
402     Res.push_back("-fmessage-length", llvm::utostr(Opts.MessageLength));
403   if (!Opts.DumpBuildInformation.empty())
404     Res.push_back("-dump-build-information", Opts.DumpBuildInformation);
405   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
406     Res.push_back("-W" + Opts.Warnings[i]);
407 }
408 
409 static const char *getInputKindName(InputKind Kind) {
410   switch (Kind) {
411   case IK_None:              break;
412   case IK_AST:               return "ast";
413   case IK_Asm:               return "assembler-with-cpp";
414   case IK_C:                 return "c";
415   case IK_CXX:               return "c++";
416   case IK_LLVM_IR:           return "ir";
417   case IK_ObjC:              return "objective-c";
418   case IK_ObjCXX:            return "objective-c++";
419   case IK_OpenCL:            return "cl";
420   case IK_CUDA:              return "cuda";
421   case IK_PreprocessedC:     return "cpp-output";
422   case IK_PreprocessedCXX:   return "c++-cpp-output";
423   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
424   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
425   }
426 
427   llvm_unreachable("Unexpected language kind!");
428 }
429 
430 static const char *getActionName(frontend::ActionKind Kind) {
431   switch (Kind) {
432   case frontend::PluginAction:
433     llvm_unreachable("Invalid kind!");
434 
435   case frontend::ASTDump:                return "-ast-dump";
436   case frontend::ASTDumpXML:             return "-ast-dump-xml";
437   case frontend::ASTPrint:               return "-ast-print";
438   case frontend::ASTView:                return "-ast-view";
439   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
440   case frontend::DumpTokens:             return "-dump-tokens";
441   case frontend::EmitAssembly:           return "-S";
442   case frontend::EmitBC:                 return "-emit-llvm-bc";
443   case frontend::EmitHTML:               return "-emit-html";
444   case frontend::EmitLLVM:               return "-emit-llvm";
445   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
446   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
447   case frontend::EmitObj:                return "-emit-obj";
448   case frontend::FixIt:                  return "-fixit";
449   case frontend::GenerateModule:         return "-emit-module";
450   case frontend::GeneratePCH:            return "-emit-pch";
451   case frontend::GeneratePTH:            return "-emit-pth";
452   case frontend::InitOnly:               return "-init-only";
453   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
454   case frontend::PrintDeclContext:       return "-print-decl-contexts";
455   case frontend::PrintPreamble:          return "-print-preamble";
456   case frontend::PrintPreprocessedInput: return "-E";
457   case frontend::RewriteMacros:          return "-rewrite-macros";
458   case frontend::RewriteObjC:            return "-rewrite-objc";
459   case frontend::RewriteTest:            return "-rewrite-test";
460   case frontend::RunAnalysis:            return "-analyze";
461   case frontend::MigrateSource:          return "-migrate";
462   case frontend::RunPreprocessorOnly:    return "-Eonly";
463   }
464 
465   llvm_unreachable("Unexpected language kind!");
466 }
467 
468 static void FileSystemOptsToArgs(const FileSystemOptions &Opts, ToArgsList &Res){
469   if (!Opts.WorkingDir.empty())
470     Res.push_back("-working-directory", Opts.WorkingDir);
471 }
472 
473 static void FrontendOptsToArgs(const FrontendOptions &Opts, ToArgsList &Res) {
474   if (Opts.DisableFree)
475     Res.push_back("-disable-free");
476   if (Opts.RelocatablePCH)
477     Res.push_back("-relocatable-pch");
478   if (Opts.ShowHelp)
479     Res.push_back("-help");
480   if (Opts.ShowMacrosInCodeCompletion)
481     Res.push_back("-code-completion-macros");
482   if (Opts.ShowCodePatternsInCodeCompletion)
483     Res.push_back("-code-completion-patterns");
484   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
485     Res.push_back("-no-code-completion-globals");
486   if (Opts.ShowStats)
487     Res.push_back("-print-stats");
488   if (Opts.ShowTimers)
489     Res.push_back("-ftime-report");
490   if (Opts.ShowVersion)
491     Res.push_back("-version");
492   if (Opts.FixWhatYouCan)
493     Res.push_back("-fix-what-you-can");
494   if (Opts.FixOnlyWarnings)
495     Res.push_back("-fix-only-warnings");
496   if (Opts.FixAndRecompile)
497     Res.push_back("-fixit-recompile");
498   if (Opts.FixToTemporaries)
499     Res.push_back("-fixit-to-temporary");
500   switch (Opts.ARCMTAction) {
501   case FrontendOptions::ARCMT_None:
502     break;
503   case FrontendOptions::ARCMT_Check:
504     Res.push_back("-arcmt-check");
505     break;
506   case FrontendOptions::ARCMT_Modify:
507     Res.push_back("-arcmt-modify");
508     break;
509   case FrontendOptions::ARCMT_Migrate:
510     Res.push_back("-arcmt-migrate");
511     break;
512   }
513   if (!Opts.MTMigrateDir.empty())
514     Res.push_back("-mt-migrate-directory", Opts.MTMigrateDir);
515   if (!Opts.ARCMTMigrateReportOut.empty())
516     Res.push_back("-arcmt-migrate-report-output", Opts.ARCMTMigrateReportOut);
517   if (Opts.ARCMTMigrateEmitARCErrors)
518     Res.push_back("-arcmt-migrate-emit-errors");
519 
520   if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals)
521     Res.push_back("-objcmt-migrate-literals");
522   if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting)
523     Res.push_back("-objcmt-migrate-subscripting");
524 
525   bool NeedLang = false;
526   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
527     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
528         Opts.Inputs[i].Kind)
529       NeedLang = true;
530   if (NeedLang)
531     Res.push_back("-x", getInputKindName(Opts.Inputs[0].Kind));
532   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
533     assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
534            "Unable to represent this input vector!");
535     Res.push_back(Opts.Inputs[i].File);
536   }
537 
538   if (!Opts.OutputFile.empty())
539     Res.push_back("-o", Opts.OutputFile);
540   if (!Opts.CodeCompletionAt.FileName.empty())
541     Res.push_back("-code-completion-at",
542                   Opts.CodeCompletionAt.FileName + ":" +
543                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
544                   llvm::utostr(Opts.CodeCompletionAt.Column));
545   if (Opts.ProgramAction != frontend::PluginAction)
546     Res.push_back(getActionName(Opts.ProgramAction));
547   if (!Opts.ActionName.empty()) {
548     Res.push_back("-plugin", Opts.ActionName);
549     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i)
550       Res.push_back("-plugin-arg-" + Opts.ActionName, Opts.PluginArgs[i]);
551   }
552   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i)
553     Res.push_back("-load", Opts.Plugins[i]);
554   for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
555     Res.push_back("-add-plugin", Opts.AddPluginActions[i]);
556     for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai)
557       Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i],
558                     Opts.AddPluginArgs[i][ai]);
559   }
560   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i)
561     Res.push_back("-ast-merge", Opts.ASTMergeFiles[i]);
562   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i)
563     Res.push_back("-mllvm", Opts.LLVMArgs[i]);
564   if (!Opts.OverrideRecordLayoutsFile.empty())
565     Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
566 }
567 
568 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
569                                    ToArgsList &Res) {
570   if (Opts.Sysroot != "/") {
571     Res.push_back("-isysroot");
572     Res.push_back(Opts.Sysroot);
573   }
574 
575   /// User specified include entries.
576   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
577     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
578     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
579       llvm::report_fatal_error("Invalid option set!");
580     if (E.IsUserSupplied) {
581       switch (E.Group) {
582       case frontend::After:
583         Res.push_back("-idirafter");
584         break;
585 
586       case frontend::Quoted:
587         Res.push_back("-iquote");
588         break;
589 
590       case frontend::System:
591         Res.push_back("-isystem");
592         break;
593 
594       case frontend::IndexHeaderMap:
595         Res.push_back("-index-header-map");
596         Res.push_back(E.IsFramework? "-F" : "-I");
597         break;
598 
599       case frontend::CSystem:
600         Res.push_back("-c-isystem");
601         break;
602 
603       case frontend::CXXSystem:
604         Res.push_back("-cxx-isystem");
605         break;
606 
607       case frontend::ObjCSystem:
608         Res.push_back("-objc-isystem");
609         break;
610 
611       case frontend::ObjCXXSystem:
612         Res.push_back("-objcxx-isystem");
613         break;
614 
615       case frontend::Angled:
616         Res.push_back(E.IsFramework ? "-F" : "-I");
617         break;
618       }
619     } else {
620       if (E.IsInternal) {
621         assert(E.Group == frontend::System && "Unexpected header search group");
622         if (E.ImplicitExternC)
623           Res.push_back("-internal-externc-isystem");
624         else
625           Res.push_back("-internal-isystem");
626       } else {
627         if (E.Group != frontend::Angled && E.Group != frontend::System)
628           llvm::report_fatal_error("Invalid option set!");
629         Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
630                       "-iwithprefix");
631       }
632     }
633     Res.push_back(E.Path);
634   }
635 
636   /// User-specified system header prefixes.
637   for (unsigned i = 0, e = Opts.SystemHeaderPrefixes.size(); i != e; ++i) {
638     if (Opts.SystemHeaderPrefixes[i].IsSystemHeader)
639       Res.push_back("-isystem-prefix");
640     else
641       Res.push_back("-ino-system-prefix");
642 
643     Res.push_back(Opts.SystemHeaderPrefixes[i].Prefix);
644   }
645 
646   if (!Opts.ResourceDir.empty())
647     Res.push_back("-resource-dir", Opts.ResourceDir);
648   if (!Opts.ModuleCachePath.empty())
649     Res.push_back("-fmodule-cache-path", Opts.ModuleCachePath);
650   if (!Opts.UseStandardSystemIncludes)
651     Res.push_back("-nostdsysteminc");
652   if (!Opts.UseStandardCXXIncludes)
653     Res.push_back("-nostdinc++");
654   if (Opts.UseLibcxx)
655     Res.push_back("-stdlib=libc++");
656   if (Opts.Verbose)
657     Res.push_back("-v");
658 }
659 
660 static void LangOptsToArgs(const LangOptions &Opts, ToArgsList &Res) {
661   LangOptions DefaultLangOpts;
662 
663   // FIXME: Need to set -std to get all the implicit options.
664 
665   // FIXME: We want to only pass options relative to the defaults, which
666   // requires constructing a target. :(
667   //
668   // It would be better to push the all target specific choices into the driver,
669   // so that everything below that was more uniform.
670 
671   if (Opts.Trigraphs)
672     Res.push_back("-trigraphs");
673   // Implicit based on the input kind:
674   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
675   // Implicit based on the input language standard:
676   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
677   if (Opts.DollarIdents)
678     Res.push_back("-fdollars-in-identifiers");
679   if (Opts.GNUMode && !Opts.GNUKeywords)
680     Res.push_back("-fno-gnu-keywords");
681   if (!Opts.GNUMode && Opts.GNUKeywords)
682     Res.push_back("-fgnu-keywords");
683   if (Opts.MicrosoftExt)
684     Res.push_back("-fms-extensions");
685   if (Opts.MicrosoftMode)
686     Res.push_back("-fms-compatibility");
687   if (Opts.MSCVersion != 0)
688     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
689   if (Opts.Borland)
690     Res.push_back("-fborland-extensions");
691   if (Opts.ObjCDefaultSynthProperties)
692     Res.push_back("-fobjc-default-synthesize-properties");
693   // NoInline is implicit.
694   if (!Opts.CXXOperatorNames)
695     Res.push_back("-fno-operator-names");
696   if (Opts.PascalStrings)
697     Res.push_back("-fpascal-strings");
698   if (Opts.CatchUndefined)
699     Res.push_back("-fcatch-undefined-behavior");
700   if (Opts.AddressSanitizer)
701     Res.push_back("-faddress-sanitizer");
702   if (Opts.ThreadSanitizer)
703     Res.push_back("-fthread-sanitizer");
704   if (Opts.WritableStrings)
705     Res.push_back("-fwritable-strings");
706   if (Opts.ConstStrings)
707     Res.push_back("-fconst-strings");
708   if (!Opts.LaxVectorConversions)
709     Res.push_back("-fno-lax-vector-conversions");
710   if (Opts.AltiVec)
711     Res.push_back("-faltivec");
712   if (Opts.Exceptions)
713     Res.push_back("-fexceptions");
714   if (Opts.ObjCExceptions)
715     Res.push_back("-fobjc-exceptions");
716   if (Opts.CXXExceptions)
717     Res.push_back("-fcxx-exceptions");
718   if (Opts.SjLjExceptions)
719     Res.push_back("-fsjlj-exceptions");
720   if (Opts.TraditionalCPP)
721     Res.push_back("-traditional-cpp");
722   if (!Opts.RTTI)
723     Res.push_back("-fno-rtti");
724   if (Opts.MSBitfields)
725     Res.push_back("-mms-bitfields");
726   if (Opts.Freestanding)
727     Res.push_back("-ffreestanding");
728   if (Opts.NoBuiltin)
729     Res.push_back("-fno-builtin");
730   if (!Opts.AssumeSaneOperatorNew)
731     Res.push_back("-fno-assume-sane-operator-new");
732   if (!Opts.ThreadsafeStatics)
733     Res.push_back("-fno-threadsafe-statics");
734   if (Opts.POSIXThreads)
735     Res.push_back("-pthread");
736   if (Opts.Blocks)
737     Res.push_back("-fblocks");
738   if (Opts.BlocksRuntimeOptional)
739     Res.push_back("-fblocks-runtime-optional");
740   if (Opts.Modules)
741     Res.push_back("-fmodules");
742   if (Opts.EmitAllDecls)
743     Res.push_back("-femit-all-decls");
744   if (Opts.MathErrno)
745     Res.push_back("-fmath-errno");
746   switch (Opts.getSignedOverflowBehavior()) {
747   case LangOptions::SOB_Undefined: break;
748   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
749   case LangOptions::SOB_Trapping:
750     Res.push_back("-ftrapv");
751     if (!Opts.OverflowHandler.empty())
752       Res.push_back("-ftrapv-handler", Opts.OverflowHandler);
753     break;
754   }
755   if (Opts.HeinousExtensions)
756     Res.push_back("-fheinous-gnu-extensions");
757   // Optimize is implicit.
758   // OptimizeSize is implicit.
759   if (Opts.FastMath)
760     Res.push_back("-ffast-math");
761   if (Opts.Static)
762     Res.push_back("-static-define");
763   if (Opts.DumpRecordLayoutsSimple)
764     Res.push_back("-fdump-record-layouts-simple");
765   else if (Opts.DumpRecordLayouts)
766     Res.push_back("-fdump-record-layouts");
767   if (Opts.DumpVTableLayouts)
768     Res.push_back("-fdump-vtable-layouts");
769   if (Opts.NoBitFieldTypeAlign)
770     Res.push_back("-fno-bitfield-type-alignment");
771   if (Opts.PICLevel)
772     Res.push_back("-pic-level", llvm::utostr(Opts.PICLevel));
773   if (Opts.PIELevel)
774     Res.push_back("-pie-level", llvm::utostr(Opts.PIELevel));
775   if (Opts.ObjCGCBitmapPrint)
776     Res.push_back("-print-ivar-layout");
777   if (Opts.NoConstantCFStrings)
778     Res.push_back("-fno-constant-cfstrings");
779   if (!Opts.AccessControl)
780     Res.push_back("-fno-access-control");
781   if (!Opts.CharIsSigned)
782     Res.push_back("-fno-signed-char");
783   if (Opts.ShortWChar)
784     Res.push_back("-fshort-wchar");
785   if (!Opts.ElideConstructors)
786     Res.push_back("-fno-elide-constructors");
787   if (Opts.getGC() != LangOptions::NonGC) {
788     if (Opts.getGC() == LangOptions::HybridGC) {
789       Res.push_back("-fobjc-gc");
790     } else {
791       assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
792       Res.push_back("-fobjc-gc-only");
793     }
794   }
795   Res.push_back("-fobjc-runtime=" + Opts.ObjCRuntime.getAsString());
796   if (Opts.ObjCAutoRefCount)
797     Res.push_back("-fobjc-arc");
798   if (Opts.ObjCRuntimeHasWeak)
799     Res.push_back("-fobjc-runtime-has-weak");
800   if (!Opts.ObjCInferRelatedResultType)
801     Res.push_back("-fno-objc-infer-related-result-type");
802 
803   if (Opts.AppleKext)
804     Res.push_back("-fapple-kext");
805 
806   if (Opts.getVisibilityMode() != DefaultVisibility) {
807     Res.push_back("-fvisibility");
808     if (Opts.getVisibilityMode() == HiddenVisibility) {
809       Res.push_back("hidden");
810     } else {
811       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
812              "Invalid visibility!");
813       Res.push_back("protected");
814     }
815   }
816   if (Opts.InlineVisibilityHidden)
817     Res.push_back("-fvisibility-inlines-hidden");
818 
819   if (Opts.getStackProtector() != 0)
820     Res.push_back("-stack-protector", llvm::utostr(Opts.getStackProtector()));
821   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth)
822     Res.push_back("-ftemplate-depth", llvm::utostr(Opts.InstantiationDepth));
823   if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth)
824     Res.push_back("-fconstexpr-depth", llvm::utostr(Opts.ConstexprCallDepth));
825   if (!Opts.ObjCConstantStringClass.empty())
826     Res.push_back("-fconstant-string-class", Opts.ObjCConstantStringClass);
827   if (Opts.FakeAddressSpaceMap)
828     Res.push_back("-ffake-address-space-map");
829   if (Opts.ParseUnknownAnytype)
830     Res.push_back("-funknown-anytype");
831   if (Opts.DebuggerSupport)
832     Res.push_back("-fdebugger-support");
833   if (Opts.DebuggerCastResultToId)
834     Res.push_back("-fdebugger-cast-result-to-id");
835   if (Opts.DebuggerObjCLiteral)
836     Res.push_back("-fdebugger-objc-literal");
837   if (Opts.DelayedTemplateParsing)
838     Res.push_back("-fdelayed-template-parsing");
839   if (Opts.Deprecated)
840     Res.push_back("-fdeprecated-macro");
841   if (Opts.ApplePragmaPack)
842     Res.push_back("-fapple-pragma-pack");
843   if (!Opts.CurrentModule.empty())
844     Res.push_back("-fmodule-name=" + Opts.CurrentModule);
845 }
846 
847 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
848                                    ToArgsList &Res) {
849   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
850     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
851                   Opts.Macros[i].first);
852   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
853     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
854     Res.push_back("-include", Opts.Includes[i]);
855   }
856   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i)
857     Res.push_back("-imacros", Opts.MacroIncludes[i]);
858   if (!Opts.UsePredefines)
859     Res.push_back("-undef");
860   if (Opts.DetailedRecord)
861     Res.push_back("-detailed-preprocessing-record");
862   if (!Opts.ImplicitPCHInclude.empty())
863     Res.push_back("-include-pch", Opts.ImplicitPCHInclude);
864   if (!Opts.ImplicitPTHInclude.empty())
865     Res.push_back("-include-pth", Opts.ImplicitPTHInclude);
866   if (!Opts.TokenCache.empty()) {
867     if (Opts.ImplicitPTHInclude.empty())
868       Res.push_back("-token-cache", Opts.TokenCache);
869     else
870       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
871              "Unsupported option combination!");
872   }
873   for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i)
874     Res.push_back("-chain-include", Opts.ChainedIncludes[i]);
875   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
876     Res.push_back("-remap-file", Opts.RemappedFiles[i].first + ";" +
877                                  Opts.RemappedFiles[i].second);
878   }
879 }
880 
881 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
882                                          ToArgsList &Res) {
883   if (!Opts.ShowCPP && !Opts.ShowMacros)
884     llvm::report_fatal_error("Invalid option combination!");
885 
886   if (Opts.ShowCPP && Opts.ShowMacros)
887     Res.push_back("-dD");
888   else if (!Opts.ShowCPP && Opts.ShowMacros)
889     Res.push_back("-dM");
890 
891   if (!Opts.ShowLineMarkers)
892     Res.push_back("-P");
893   if (Opts.ShowComments)
894     Res.push_back("-C");
895   if (Opts.ShowMacroComments)
896     Res.push_back("-CC");
897 }
898 
899 static void TargetOptsToArgs(const TargetOptions &Opts,
900                              ToArgsList &Res) {
901   Res.push_back("-triple");
902   Res.push_back(Opts.Triple);
903   if (!Opts.CPU.empty())
904     Res.push_back("-target-cpu", Opts.CPU);
905   if (!Opts.ABI.empty())
906     Res.push_back("-target-abi", Opts.ABI);
907   if (!Opts.LinkerVersion.empty())
908     Res.push_back("-target-linker-version", Opts.LinkerVersion);
909   if (!Opts.CXXABI.empty())
910     Res.push_back("-cxx-abi", Opts.CXXABI);
911   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i)
912     Res.push_back("-target-feature", Opts.Features[i]);
913 }
914 
915 void CompilerInvocation::toArgs(std::vector<std::string> &Res) const {
916   ToArgsList List(Res);
917   AnalyzerOptsToArgs(getAnalyzerOpts(), List);
918   CodeGenOptsToArgs(getCodeGenOpts(), List);
919   DependencyOutputOptsToArgs(getDependencyOutputOpts(), List);
920   DiagnosticOptsToArgs(getDiagnosticOpts(), List);
921   FileSystemOptsToArgs(getFileSystemOpts(), List);
922   FrontendOptsToArgs(getFrontendOpts(), List);
923   HeaderSearchOptsToArgs(getHeaderSearchOpts(), List);
924   LangOptsToArgs(*getLangOpts(), List);
925   PreprocessorOptsToArgs(getPreprocessorOpts(), List);
926   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), List);
927   TargetOptsToArgs(getTargetOpts(), List);
928 }
929 
930 //===----------------------------------------------------------------------===//
931 // Deserialization (to args)
932 //===----------------------------------------------------------------------===//
933 
934 using namespace clang::driver;
935 using namespace clang::driver::options;
936 
937 //
938 
939 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
940                                      DiagnosticsEngine &Diags) {
941   unsigned DefaultOpt = 0;
942   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
943     DefaultOpt = 2;
944 
945   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
946     if (A->getOption().matches(options::OPT_O0))
947       return 0;
948 
949     assert (A->getOption().matches(options::OPT_O));
950 
951     llvm::StringRef S(A->getValue(Args));
952     if (S == "s" || S == "z" || S.empty())
953       return 2;
954 
955     return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
956   }
957 
958   return DefaultOpt;
959 }
960 
961 static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
962                                          DiagnosticsEngine &Diags) {
963   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
964     if (A->getOption().matches(options::OPT_O)) {
965       switch (A->getValue(Args)[0]) {
966       default:
967         return 0;
968       case 's':
969         return 1;
970       case 'z':
971         return 2;
972       }
973     }
974   }
975   return 0;
976 }
977 
978 static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
979   for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
980          E = Args.filtered_end(); I != E; ++I) {
981     Arg *A = *I;
982     // If the argument is a pure flag, add its name (minus the "-W" at the beginning)
983     // to the warning list. Else, add its value (for the OPT_W case).
984     if (A->getOption().getKind() == Option::FlagClass) {
985       Warnings.push_back(A->getOption().getName().substr(2));
986     } else {
987       for (unsigned Idx = 0, End = A->getNumValues();
988            Idx < End; ++Idx) {
989         StringRef V = A->getValue(Args, Idx);
990         // "-Wl," and such are not warning options.
991         // FIXME: Should be handled by putting these in separate flags.
992         if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
993           continue;
994 
995         Warnings.push_back(V);
996       }
997     }
998   }
999 }
1000 
1001 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
1002                               DiagnosticsEngine &Diags) {
1003   using namespace options;
1004   bool Success = true;
1005   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
1006     StringRef Name = A->getValue(Args);
1007     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
1008 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
1009       .Case(CMDFLAG, NAME##Model)
1010 #include "clang/Frontend/Analyses.def"
1011       .Default(NumStores);
1012     if (Value == NumStores) {
1013       Diags.Report(diag::err_drv_invalid_value)
1014         << A->getAsString(Args) << Name;
1015       Success = false;
1016     } else {
1017       Opts.AnalysisStoreOpt = Value;
1018     }
1019   }
1020 
1021   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
1022     StringRef Name = A->getValue(Args);
1023     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
1024 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
1025       .Case(CMDFLAG, NAME##Model)
1026 #include "clang/Frontend/Analyses.def"
1027       .Default(NumConstraints);
1028     if (Value == NumConstraints) {
1029       Diags.Report(diag::err_drv_invalid_value)
1030         << A->getAsString(Args) << Name;
1031       Success = false;
1032     } else {
1033       Opts.AnalysisConstraintsOpt = Value;
1034     }
1035   }
1036 
1037   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1038     StringRef Name = A->getValue(Args);
1039     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1040 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1041       .Case(CMDFLAG, PD_##NAME)
1042 #include "clang/Frontend/Analyses.def"
1043       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1044     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1045       Diags.Report(diag::err_drv_invalid_value)
1046         << A->getAsString(Args) << Name;
1047       Success = false;
1048     } else {
1049       Opts.AnalysisDiagOpt = Value;
1050     }
1051   }
1052 
1053   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1054     StringRef Name = A->getValue(Args);
1055     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1056 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1057       .Case(CMDFLAG, NAME)
1058 #include "clang/Frontend/Analyses.def"
1059       .Default(NumPurgeModes);
1060     if (Value == NumPurgeModes) {
1061       Diags.Report(diag::err_drv_invalid_value)
1062         << A->getAsString(Args) << Name;
1063       Success = false;
1064     } else {
1065       Opts.AnalysisPurgeOpt = Value;
1066     }
1067   }
1068 
1069   if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
1070     StringRef Name = A->getValue(Args);
1071     AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
1072 #define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
1073       .Case(CMDFLAG, NAME)
1074 #include "clang/Frontend/Analyses.def"
1075       .Default(NumIPAModes);
1076     if (Value == NumIPAModes) {
1077       Diags.Report(diag::err_drv_invalid_value)
1078         << A->getAsString(Args) << Name;
1079       Success = false;
1080     } else {
1081       Opts.IPAMode = Value;
1082     }
1083   }
1084 
1085   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
1086     StringRef Name = A->getValue(Args);
1087     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
1088 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
1089       .Case(CMDFLAG, NAME)
1090 #include "clang/Frontend/Analyses.def"
1091       .Default(NumInliningModes);
1092     if (Value == NumInliningModes) {
1093       Diags.Report(diag::err_drv_invalid_value)
1094         << A->getAsString(Args) << Name;
1095       Success = false;
1096     } else {
1097       Opts.InliningMode = Value;
1098     }
1099   }
1100 
1101   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1102   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1103   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1104   Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
1105   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1106   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1107   Opts.AnalyzeNestedBlocks =
1108     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1109   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
1110   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1111   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1112   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
1113   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
1114   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1115   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1116   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1117   Opts.EagerlyTrimEGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1118   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1119   Opts.InlineMaxStackDepth =
1120     Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1121                             Opts.InlineMaxStackDepth, Diags);
1122   Opts.InlineMaxFunctionSize =
1123     Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1124                             Opts.InlineMaxFunctionSize, Diags);
1125 
1126   Opts.CheckersControlList.clear();
1127   for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1128                                              OPT_analyzer_disable_checker),
1129          ie = Args.filtered_end(); it != ie; ++it) {
1130     const Arg *A = *it;
1131     A->claim();
1132     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1133     // We can have a list of comma separated checker names, e.g:
1134     // '-analyzer-checker=cocoa,unix'
1135     StringRef checkerList = A->getValue(Args);
1136     SmallVector<StringRef, 4> checkers;
1137     checkerList.split(checkers, ",");
1138     for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1139       Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1140   }
1141 
1142   return Success;
1143 }
1144 
1145 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1146   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1147   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1148   return true;
1149 }
1150 
1151 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1152                              DiagnosticsEngine &Diags) {
1153   using namespace options;
1154   bool Success = true;
1155 
1156   unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1157   if (OptLevel > 3) {
1158     Diags.Report(diag::err_drv_invalid_value)
1159       << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1160     OptLevel = 3;
1161     Success = false;
1162   }
1163   Opts.OptimizationLevel = OptLevel;
1164 
1165   // We must always run at least the always inlining pass.
1166   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1167     : CodeGenOptions::OnlyAlwaysInlining;
1168   // -fno-inline-functions overrides OptimizationLevel > 1.
1169   Opts.NoInline = Args.hasArg(OPT_fno_inline);
1170   Opts.Inlining = Args.hasArg(OPT_fno_inline_functions) ?
1171     CodeGenOptions::OnlyAlwaysInlining : Opts.Inlining;
1172 
1173   if (Args.hasArg(OPT_gline_tables_only)) {
1174     Opts.DebugInfo = CodeGenOptions::DebugLineTablesOnly;
1175   } else if (Args.hasArg(OPT_g_Flag)) {
1176     if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
1177       Opts.DebugInfo = CodeGenOptions::LimitedDebugInfo;
1178     else
1179       Opts.DebugInfo = CodeGenOptions::FullDebugInfo;
1180   }
1181 
1182   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1183   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1184   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1185   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1186     OPT_fuse_register_sized_bitfield_access);
1187   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1188   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1189   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1190   Opts.NoCommon = Args.hasArg(OPT_fno_common);
1191   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1192   Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
1193   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1194                             Args.hasArg(OPT_ffreestanding));
1195   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1196                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1197 
1198   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1199   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1200   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1201   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1202   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1203   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1204   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1205   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1206   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1207   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1208   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1209   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1210   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1211   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1212                        Args.hasArg(OPT_cl_finite_math_only)||
1213                        Args.hasArg(OPT_cl_fast_relaxed_math));
1214   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1215                        Args.hasArg(OPT_cl_finite_math_only)||
1216                        Args.hasArg(OPT_cl_fast_relaxed_math));
1217   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1218   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1219   Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1220   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1221   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1222   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1223   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1224   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1225   Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1226   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1227   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1228   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
1229   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1230                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1231                       Args.hasArg(OPT_cl_fast_relaxed_math);
1232   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1233   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1234   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1235   Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
1236                                                 Diags);
1237   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
1238 
1239   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1240   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1241 
1242   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1243   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1244 
1245   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1246   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1247   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1248   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1249   Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1250   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1251   Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1252   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1253   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1254     StringRef Val = A->getValue(Args);
1255     Val.getAsInteger(10, Opts.StackAlignment);
1256   }
1257 
1258   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1259     StringRef Name = A->getValue(Args);
1260     unsigned Method = llvm::StringSwitch<unsigned>(Name)
1261       .Case("legacy", CodeGenOptions::Legacy)
1262       .Case("non-legacy", CodeGenOptions::NonLegacy)
1263       .Case("mixed", CodeGenOptions::Mixed)
1264       .Default(~0U);
1265     if (Method == ~0U) {
1266       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1267       Success = false;
1268     } else {
1269       Opts.ObjCDispatchMethod = Method;
1270     }
1271   }
1272 
1273   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1274     StringRef Name = A->getValue(Args);
1275     unsigned Model = llvm::StringSwitch<unsigned>(Name)
1276         .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1277         .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1278         .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1279         .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1280         .Default(~0U);
1281     if (Model == ~0U) {
1282       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1283       Success = false;
1284     } else {
1285       Opts.DefaultTLSModel = static_cast<CodeGenOptions::TLSModel>(Model);
1286     }
1287   }
1288 
1289   return Success;
1290 }
1291 
1292 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1293                                       ArgList &Args) {
1294   using namespace options;
1295   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1296   Opts.Targets = Args.getAllArgValues(OPT_MT);
1297   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1298   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1299   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1300   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1301   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1302   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1303 }
1304 
1305 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1306                                 DiagnosticsEngine *Diags) {
1307   using namespace options;
1308   bool Success = true;
1309 
1310   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1311   Opts.DiagnosticSerializationFile =
1312     Args.getLastArgValue(OPT_diagnostic_serialized_file);
1313   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1314   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1315   Opts.Pedantic = Args.hasArg(OPT_pedantic);
1316   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1317   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1318   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1319   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1320                                  OPT_fno_show_column,
1321                                  /*Default=*/true);
1322   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1323   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1324   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1325 
1326   // Default behavior is to not to show note include stacks.
1327   Opts.ShowNoteIncludeStack = false;
1328   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1329                                OPT_fno_diagnostics_show_note_include_stack))
1330     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1331       Opts.ShowNoteIncludeStack = true;
1332 
1333   StringRef ShowOverloads =
1334     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1335   if (ShowOverloads == "best")
1336     Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1337   else if (ShowOverloads == "all")
1338     Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1339   else {
1340     Success = false;
1341     if (Diags)
1342       Diags->Report(diag::err_drv_invalid_value)
1343       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1344       << ShowOverloads;
1345   }
1346 
1347   StringRef ShowCategory =
1348     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1349   if (ShowCategory == "none")
1350     Opts.ShowCategories = 0;
1351   else if (ShowCategory == "id")
1352     Opts.ShowCategories = 1;
1353   else if (ShowCategory == "name")
1354     Opts.ShowCategories = 2;
1355   else {
1356     Success = false;
1357     if (Diags)
1358       Diags->Report(diag::err_drv_invalid_value)
1359       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1360       << ShowCategory;
1361   }
1362 
1363   StringRef Format =
1364     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1365   if (Format == "clang")
1366     Opts.Format = DiagnosticOptions::Clang;
1367   else if (Format == "msvc")
1368     Opts.Format = DiagnosticOptions::Msvc;
1369   else if (Format == "vi")
1370     Opts.Format = DiagnosticOptions::Vi;
1371   else {
1372     Success = false;
1373     if (Diags)
1374       Diags->Report(diag::err_drv_invalid_value)
1375       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1376       << Format;
1377   }
1378 
1379   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1380   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1381   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1382   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1383   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1384   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1385   Opts.MacroBacktraceLimit
1386     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1387                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1388   Opts.TemplateBacktraceLimit
1389     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1390                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
1391                          Diags);
1392   Opts.ConstexprBacktraceLimit
1393     = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1394                          DiagnosticOptions::DefaultConstexprBacktraceLimit,
1395                          Diags);
1396   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1397                                     DiagnosticOptions::DefaultTabStop, Diags);
1398   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1399     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1400     if (Diags)
1401       Diags->Report(diag::warn_ignoring_ftabstop_value)
1402       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1403   }
1404   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1405   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1406   addWarningArgs(Args, Opts.Warnings);
1407 
1408   return Success;
1409 }
1410 
1411 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1412   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1413 }
1414 
1415 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1416                                    DiagnosticsEngine &Diags) {
1417   using namespace options;
1418   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1419   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1420     switch (A->getOption().getID()) {
1421     default:
1422       llvm_unreachable("Invalid option in group!");
1423     case OPT_ast_dump:
1424       Opts.ProgramAction = frontend::ASTDump; break;
1425     case OPT_ast_dump_xml:
1426       Opts.ProgramAction = frontend::ASTDumpXML; break;
1427     case OPT_ast_print:
1428       Opts.ProgramAction = frontend::ASTPrint; break;
1429     case OPT_ast_view:
1430       Opts.ProgramAction = frontend::ASTView; break;
1431     case OPT_dump_raw_tokens:
1432       Opts.ProgramAction = frontend::DumpRawTokens; break;
1433     case OPT_dump_tokens:
1434       Opts.ProgramAction = frontend::DumpTokens; break;
1435     case OPT_S:
1436       Opts.ProgramAction = frontend::EmitAssembly; break;
1437     case OPT_emit_llvm_bc:
1438       Opts.ProgramAction = frontend::EmitBC; break;
1439     case OPT_emit_html:
1440       Opts.ProgramAction = frontend::EmitHTML; break;
1441     case OPT_emit_llvm:
1442       Opts.ProgramAction = frontend::EmitLLVM; break;
1443     case OPT_emit_llvm_only:
1444       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1445     case OPT_emit_codegen_only:
1446       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1447     case OPT_emit_obj:
1448       Opts.ProgramAction = frontend::EmitObj; break;
1449     case OPT_fixit_EQ:
1450       Opts.FixItSuffix = A->getValue(Args);
1451       // fall-through!
1452     case OPT_fixit:
1453       Opts.ProgramAction = frontend::FixIt; break;
1454     case OPT_emit_module:
1455       Opts.ProgramAction = frontend::GenerateModule; break;
1456     case OPT_emit_pch:
1457       Opts.ProgramAction = frontend::GeneratePCH; break;
1458     case OPT_emit_pth:
1459       Opts.ProgramAction = frontend::GeneratePTH; break;
1460     case OPT_init_only:
1461       Opts.ProgramAction = frontend::InitOnly; break;
1462     case OPT_fsyntax_only:
1463       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1464     case OPT_print_decl_contexts:
1465       Opts.ProgramAction = frontend::PrintDeclContext; break;
1466     case OPT_print_preamble:
1467       Opts.ProgramAction = frontend::PrintPreamble; break;
1468     case OPT_E:
1469       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1470     case OPT_rewrite_macros:
1471       Opts.ProgramAction = frontend::RewriteMacros; break;
1472     case OPT_rewrite_objc:
1473       Opts.ProgramAction = frontend::RewriteObjC; break;
1474     case OPT_rewrite_test:
1475       Opts.ProgramAction = frontend::RewriteTest; break;
1476     case OPT_analyze:
1477       Opts.ProgramAction = frontend::RunAnalysis; break;
1478     case OPT_migrate:
1479       Opts.ProgramAction = frontend::MigrateSource; break;
1480     case OPT_Eonly:
1481       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1482     }
1483   }
1484 
1485   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1486     Opts.Plugins.push_back(A->getValue(Args,0));
1487     Opts.ProgramAction = frontend::PluginAction;
1488     Opts.ActionName = A->getValue(Args);
1489 
1490     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1491            end = Args.filtered_end(); it != end; ++it) {
1492       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1493         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1494     }
1495   }
1496 
1497   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1498   Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1499   for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1500     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1501            end = Args.filtered_end(); it != end; ++it) {
1502       if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1503         Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1504     }
1505   }
1506 
1507   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1508     Opts.CodeCompletionAt =
1509       ParsedSourceLocation::FromString(A->getValue(Args));
1510     if (Opts.CodeCompletionAt.FileName.empty())
1511       Diags.Report(diag::err_drv_invalid_value)
1512         << A->getAsString(Args) << A->getValue(Args);
1513   }
1514   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1515 
1516   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1517   Opts.Plugins = Args.getAllArgValues(OPT_load);
1518   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1519   Opts.ShowHelp = Args.hasArg(OPT_help);
1520   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1521   Opts.ShowCodePatternsInCodeCompletion
1522     = Args.hasArg(OPT_code_completion_patterns);
1523   Opts.ShowGlobalSymbolsInCodeCompletion
1524     = !Args.hasArg(OPT_no_code_completion_globals);
1525   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1526   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1527   Opts.ShowVersion = Args.hasArg(OPT_version);
1528   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1529   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1530   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1531   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1532   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1533   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1534   Opts.OverrideRecordLayoutsFile
1535     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1536   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1537                                      OPT_arcmt_modify,
1538                                      OPT_arcmt_migrate)) {
1539     switch (A->getOption().getID()) {
1540     default:
1541       llvm_unreachable("missed a case");
1542     case OPT_arcmt_check:
1543       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1544       break;
1545     case OPT_arcmt_modify:
1546       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1547       break;
1548     case OPT_arcmt_migrate:
1549       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1550       break;
1551     }
1552   }
1553   Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1554   Opts.ARCMTMigrateReportOut
1555     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1556   Opts.ARCMTMigrateEmitARCErrors
1557     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1558 
1559   if (Args.hasArg(OPT_objcmt_migrate_literals))
1560     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1561   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1562     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1563 
1564   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1565       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1566     Diags.Report(diag::err_drv_argument_not_allowed_with)
1567       << "ARC migration" << "ObjC migration";
1568   }
1569 
1570   InputKind DashX = IK_None;
1571   if (const Arg *A = Args.getLastArg(OPT_x)) {
1572     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1573       .Case("c", IK_C)
1574       .Case("cl", IK_OpenCL)
1575       .Case("cuda", IK_CUDA)
1576       .Case("c++", IK_CXX)
1577       .Case("objective-c", IK_ObjC)
1578       .Case("objective-c++", IK_ObjCXX)
1579       .Case("cpp-output", IK_PreprocessedC)
1580       .Case("assembler-with-cpp", IK_Asm)
1581       .Case("c++-cpp-output", IK_PreprocessedCXX)
1582       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1583       .Case("objc-cpp-output", IK_PreprocessedObjC)
1584       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1585       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1586       .Case("c-header", IK_C)
1587       .Case("cl-header", IK_OpenCL)
1588       .Case("objective-c-header", IK_ObjC)
1589       .Case("c++-header", IK_CXX)
1590       .Case("objective-c++-header", IK_ObjCXX)
1591       .Case("ast", IK_AST)
1592       .Case("ir", IK_LLVM_IR)
1593       .Default(IK_None);
1594     if (DashX == IK_None)
1595       Diags.Report(diag::err_drv_invalid_value)
1596         << A->getAsString(Args) << A->getValue(Args);
1597   }
1598 
1599   // '-' is the default input if none is given.
1600   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1601   Opts.Inputs.clear();
1602   if (Inputs.empty())
1603     Inputs.push_back("-");
1604   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1605     InputKind IK = DashX;
1606     if (IK == IK_None) {
1607       IK = FrontendOptions::getInputKindForExtension(
1608         StringRef(Inputs[i]).rsplit('.').second);
1609       // FIXME: Remove this hack.
1610       if (i == 0)
1611         DashX = IK;
1612     }
1613     Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1614   }
1615 
1616   return DashX;
1617 }
1618 
1619 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1620                                                  void *MainAddr) {
1621   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1622 
1623   if (!P.isEmpty()) {
1624     P.eraseComponent();  // Remove /clang from foo/bin/clang
1625     P.eraseComponent();  // Remove /bin   from foo/bin
1626 
1627     // Get foo/lib/clang/<version>/include
1628     P.appendComponent("lib");
1629     P.appendComponent("clang");
1630     P.appendComponent(CLANG_VERSION_STRING);
1631   }
1632 
1633   return P.str();
1634 }
1635 
1636 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1637   using namespace options;
1638   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1639   Opts.Verbose = Args.hasArg(OPT_v);
1640   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1641   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1642   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1643   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1644     Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1645   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1646   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1647   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1648 
1649   // Add -I..., -F..., and -index-header-map options in order.
1650   bool IsIndexHeaderMap = false;
1651   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1652                                              OPT_index_header_map),
1653        ie = Args.filtered_end(); it != ie; ++it) {
1654     if ((*it)->getOption().matches(OPT_index_header_map)) {
1655       // -index-header-map applies to the next -I or -F.
1656       IsIndexHeaderMap = true;
1657       continue;
1658     }
1659 
1660     frontend::IncludeDirGroup Group
1661       = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1662 
1663     Opts.AddPath((*it)->getValue(Args), Group, true,
1664                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1665     IsIndexHeaderMap = false;
1666   }
1667 
1668   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1669   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1670   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1671                                              OPT_iwithprefixbefore),
1672          ie = Args.filtered_end(); it != ie; ++it) {
1673     const Arg *A = *it;
1674     if (A->getOption().matches(OPT_iprefix))
1675       Prefix = A->getValue(Args);
1676     else if (A->getOption().matches(OPT_iwithprefix))
1677       Opts.AddPath(Prefix.str() + A->getValue(Args),
1678                    frontend::System, false, false, false);
1679     else
1680       Opts.AddPath(Prefix.str() + A->getValue(Args),
1681                    frontend::Angled, false, false, false);
1682   }
1683 
1684   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1685          ie = Args.filtered_end(); it != ie; ++it)
1686     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1687   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1688          ie = Args.filtered_end(); it != ie; ++it)
1689     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1690   for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1691          OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1692     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1693                  !(*it)->getOption().matches(OPT_iwithsysroot));
1694   for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1695          ie = Args.filtered_end(); it != ie; ++it)
1696     Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1697                  true);
1698 
1699   // Add the paths for the various language specific isystem flags.
1700   for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1701        ie = Args.filtered_end(); it != ie; ++it)
1702     Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1703   for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1704        ie = Args.filtered_end(); it != ie; ++it)
1705     Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1706   for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1707        ie = Args.filtered_end(); it != ie; ++it)
1708     Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1709   for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1710        ie = Args.filtered_end(); it != ie; ++it)
1711     Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1712                  true);
1713 
1714   // Add the internal paths from a driver that detects standard include paths.
1715   for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1716                                             OPT_internal_externc_isystem),
1717                     E = Args.filtered_end();
1718        I != E; ++I)
1719     Opts.AddPath((*I)->getValue(Args), frontend::System,
1720                  false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1721                  (*I)->getOption().matches(OPT_internal_externc_isystem));
1722 
1723   // Add the path prefixes which are implicitly treated as being system headers.
1724   for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1725                                             OPT_ino_system_prefix),
1726                     E = Args.filtered_end();
1727        I != E; ++I)
1728     Opts.AddSystemHeaderPrefix((*I)->getValue(Args),
1729                                (*I)->getOption().matches(OPT_isystem_prefix));
1730 }
1731 
1732 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1733                                          LangStandard::Kind LangStd) {
1734   // Set some properties which depend solely on the input kind; it would be nice
1735   // to move these to the language standard, and have the driver resolve the
1736   // input kind + language standard.
1737   if (IK == IK_Asm) {
1738     Opts.AsmPreprocessor = 1;
1739   } else if (IK == IK_ObjC ||
1740              IK == IK_ObjCXX ||
1741              IK == IK_PreprocessedObjC ||
1742              IK == IK_PreprocessedObjCXX) {
1743     Opts.ObjC1 = Opts.ObjC2 = 1;
1744   }
1745 
1746   if (LangStd == LangStandard::lang_unspecified) {
1747     // Based on the base language, pick one.
1748     switch (IK) {
1749     case IK_None:
1750     case IK_AST:
1751     case IK_LLVM_IR:
1752       llvm_unreachable("Invalid input kind!");
1753     case IK_OpenCL:
1754       LangStd = LangStandard::lang_opencl;
1755       break;
1756     case IK_CUDA:
1757       LangStd = LangStandard::lang_cuda;
1758       break;
1759     case IK_Asm:
1760     case IK_C:
1761     case IK_PreprocessedC:
1762     case IK_ObjC:
1763     case IK_PreprocessedObjC:
1764       LangStd = LangStandard::lang_gnu99;
1765       break;
1766     case IK_CXX:
1767     case IK_PreprocessedCXX:
1768     case IK_ObjCXX:
1769     case IK_PreprocessedObjCXX:
1770       LangStd = LangStandard::lang_gnucxx98;
1771       break;
1772     }
1773   }
1774 
1775   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1776   Opts.BCPLComment = Std.hasBCPLComments();
1777   Opts.C99 = Std.isC99();
1778   Opts.C11 = Std.isC11();
1779   Opts.CPlusPlus = Std.isCPlusPlus();
1780   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1781   Opts.Digraphs = Std.hasDigraphs();
1782   Opts.GNUMode = Std.isGNUMode();
1783   Opts.GNUInline = !Std.isC99();
1784   Opts.HexFloats = Std.hasHexFloats();
1785   Opts.ImplicitInt = Std.hasImplicitInt();
1786 
1787   // Set OpenCL Version.
1788   if (LangStd == LangStandard::lang_opencl) {
1789     Opts.OpenCL = 1;
1790     Opts.OpenCLVersion = 100;
1791   }
1792   else if (LangStd == LangStandard::lang_opencl11) {
1793       Opts.OpenCL = 1;
1794       Opts.OpenCLVersion = 110;
1795   }
1796   else if (LangStd == LangStandard::lang_opencl12) {
1797     Opts.OpenCL = 1;
1798     Opts.OpenCLVersion = 120;
1799   }
1800 
1801   // OpenCL has some additional defaults.
1802   if (Opts.OpenCL) {
1803     Opts.AltiVec = 0;
1804     Opts.CXXOperatorNames = 1;
1805     Opts.LaxVectorConversions = 0;
1806     Opts.DefaultFPContract = 1;
1807   }
1808 
1809   if (LangStd == LangStandard::lang_cuda)
1810     Opts.CUDA = 1;
1811 
1812   // OpenCL and C++ both have bool, true, false keywords.
1813   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1814 
1815   Opts.GNUKeywords = Opts.GNUMode;
1816   Opts.CXXOperatorNames = Opts.CPlusPlus;
1817 
1818   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1819   // is specified, or -std is set to a conforming mode.
1820   Opts.Trigraphs = !Opts.GNUMode;
1821 
1822   Opts.DollarIdents = !Opts.AsmPreprocessor;
1823 }
1824 
1825 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1826                           DiagnosticsEngine &Diags) {
1827   // FIXME: Cleanup per-file based stuff.
1828   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1829   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1830     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1831 #define LANGSTANDARD(id, name, desc, features) \
1832       .Case(name, LangStandard::lang_##id)
1833 #include "clang/Frontend/LangStandards.def"
1834       .Default(LangStandard::lang_unspecified);
1835     if (LangStd == LangStandard::lang_unspecified)
1836       Diags.Report(diag::err_drv_invalid_value)
1837         << A->getAsString(Args) << A->getValue(Args);
1838     else {
1839       // Valid standard, check to make sure language and standard are compatable.
1840       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1841       switch (IK) {
1842       case IK_C:
1843       case IK_ObjC:
1844       case IK_PreprocessedC:
1845       case IK_PreprocessedObjC:
1846         if (!(Std.isC89() || Std.isC99()))
1847           Diags.Report(diag::err_drv_argument_not_allowed_with)
1848             << A->getAsString(Args) << "C/ObjC";
1849         break;
1850       case IK_CXX:
1851       case IK_ObjCXX:
1852       case IK_PreprocessedCXX:
1853       case IK_PreprocessedObjCXX:
1854         if (!Std.isCPlusPlus())
1855           Diags.Report(diag::err_drv_argument_not_allowed_with)
1856             << A->getAsString(Args) << "C++/ObjC++";
1857         break;
1858       case IK_OpenCL:
1859         if (!Std.isC99())
1860           Diags.Report(diag::err_drv_argument_not_allowed_with)
1861             << A->getAsString(Args) << "OpenCL";
1862         break;
1863       case IK_CUDA:
1864         if (!Std.isCPlusPlus())
1865           Diags.Report(diag::err_drv_argument_not_allowed_with)
1866             << A->getAsString(Args) << "CUDA";
1867         break;
1868       default:
1869         break;
1870       }
1871     }
1872   }
1873 
1874   // -cl-std only applies for OpenCL language standards.
1875   // Override the -std option in this case.
1876   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1877     LangStandard::Kind OpenCLLangStd
1878     = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1879     .Case("CL", LangStandard::lang_opencl)
1880     .Case("CL1.1", LangStandard::lang_opencl11)
1881     .Case("CL1.2", LangStandard::lang_opencl12)
1882     .Default(LangStandard::lang_unspecified);
1883 
1884     if (OpenCLLangStd == LangStandard::lang_unspecified) {
1885       Diags.Report(diag::err_drv_invalid_value)
1886       << A->getAsString(Args) << A->getValue(Args);
1887     }
1888     else
1889       LangStd = OpenCLLangStd;
1890   }
1891 
1892   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1893 
1894   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1895   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1896   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1897   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1898   // name, as it doesn't seem a useful distinction.
1899   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1900                                   Opts.GNUKeywords);
1901 
1902   if (Args.hasArg(OPT_fno_operator_names))
1903     Opts.CXXOperatorNames = 0;
1904 
1905   if (Opts.ObjC1) {
1906     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1907       StringRef value = arg->getValue(Args);
1908       if (Opts.ObjCRuntime.tryParse(value))
1909         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1910     }
1911 
1912     if (Args.hasArg(OPT_fobjc_gc_only))
1913       Opts.setGC(LangOptions::GCOnly);
1914     else if (Args.hasArg(OPT_fobjc_gc))
1915       Opts.setGC(LangOptions::HybridGC);
1916     else if (Args.hasArg(OPT_fobjc_arc)) {
1917       Opts.ObjCAutoRefCount = 1;
1918       if (!Opts.ObjCRuntime.isNonFragile())
1919         Diags.Report(diag::err_arc_nonfragile_abi);
1920     }
1921 
1922     Opts.ObjCRuntimeHasWeak = Opts.ObjCRuntime.hasWeak();
1923     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1924       Opts.ObjCRuntimeHasWeak = 1;
1925 
1926     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1927       Opts.ObjCInferRelatedResultType = 0;
1928   }
1929 
1930   if (Args.hasArg(OPT_fgnu89_inline))
1931     Opts.GNUInline = 1;
1932 
1933   if (Args.hasArg(OPT_fapple_kext)) {
1934     if (!Opts.CPlusPlus)
1935       Diags.Report(diag::warn_c_kext);
1936     else
1937       Opts.AppleKext = 1;
1938   }
1939 
1940   if (Args.hasArg(OPT_print_ivar_layout))
1941     Opts.ObjCGCBitmapPrint = 1;
1942   if (Args.hasArg(OPT_fno_constant_cfstrings))
1943     Opts.NoConstantCFStrings = 1;
1944 
1945   if (Args.hasArg(OPT_faltivec))
1946     Opts.AltiVec = 1;
1947 
1948   if (Args.hasArg(OPT_pthread))
1949     Opts.POSIXThreads = 1;
1950 
1951   if (Args.hasArg(OPT_fdelayed_template_parsing))
1952     Opts.DelayedTemplateParsing = 1;
1953 
1954   StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1955   if (Vis == "default")
1956     Opts.setVisibilityMode(DefaultVisibility);
1957   else if (Vis == "hidden")
1958     Opts.setVisibilityMode(HiddenVisibility);
1959   else if (Vis == "protected")
1960     // FIXME: diagnose if target does not support protected visibility
1961     Opts.setVisibilityMode(ProtectedVisibility);
1962   else
1963     Diags.Report(diag::err_drv_invalid_value)
1964       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1965 
1966   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1967     Opts.InlineVisibilityHidden = 1;
1968 
1969   if (Args.hasArg(OPT_ftrapv)) {
1970     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1971     // Set the handler, if one is specified.
1972     Opts.OverflowHandler =
1973         Args.getLastArgValue(OPT_ftrapv_handler);
1974   }
1975   else if (Args.hasArg(OPT_fwrapv))
1976     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1977 
1978   if (Args.hasArg(OPT_trigraphs))
1979     Opts.Trigraphs = 1;
1980 
1981   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1982                                    OPT_fno_dollars_in_identifiers,
1983                                    Opts.DollarIdents);
1984   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1985   Opts.MicrosoftExt
1986     = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1987   Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
1988   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1989   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1990   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1991   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
1992                                    Opts.ConstStrings);
1993   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1994     Opts.LaxVectorConversions = 0;
1995   if (Args.hasArg(OPT_fno_threadsafe_statics))
1996     Opts.ThreadsafeStatics = 0;
1997   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1998   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
1999   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2000   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2001   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2002 
2003   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
2004   Opts.Blocks = Args.hasArg(OPT_fblocks);
2005   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2006   Opts.Modules = Args.hasArg(OPT_fmodules);
2007   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
2008   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
2009   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2010   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2011   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2012   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
2013   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2014   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2015   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2016   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
2017   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
2018                                                     Diags);
2019   Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
2020                                                     Diags);
2021   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2022   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
2023                                                     0, Diags);
2024   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2025   Opts.ObjCConstantStringClass =
2026     Args.getLastArgValue(OPT_fconstant_string_class);
2027   Opts.ObjCDefaultSynthProperties =
2028     Args.hasArg(OPT_fobjc_default_synthesize_properties);
2029   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
2030   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2031   Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
2032   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
2033   Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
2034   Opts.Static = Args.hasArg(OPT_static_define);
2035   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2036   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2037                         || Args.hasArg(OPT_fdump_record_layouts);
2038   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2039   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2040   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2041   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2042   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2043   Opts.MRTD = Args.hasArg(OPT_mrtd);
2044   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2045   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2046   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2047   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2048   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2049   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2050   Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
2051   Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
2052   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2053   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
2054 
2055   // Record whether the __DEPRECATED define was requested.
2056   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2057                                  OPT_fno_deprecated_macro,
2058                                  Opts.Deprecated);
2059 
2060   // FIXME: Eliminate this dependency.
2061   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
2062   Opts.Optimize = Opt != 0;
2063   Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
2064 
2065   // This is the __NO_INLINE__ define, which just depends on things like the
2066   // optimization level and -fno-inline, not actually whether the backend has
2067   // inlining enabled.
2068   Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2069 
2070   Opts.FastMath = Args.hasArg(OPT_ffast_math);
2071 
2072   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
2073   switch (SSP) {
2074   default:
2075     Diags.Report(diag::err_drv_invalid_value)
2076       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2077     break;
2078   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2079   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2080   case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
2081   }
2082 }
2083 
2084 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2085                                   FileManager &FileMgr,
2086                                   DiagnosticsEngine &Diags) {
2087   using namespace options;
2088   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2089   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2090   if (const Arg *A = Args.getLastArg(OPT_token_cache))
2091       Opts.TokenCache = A->getValue(Args);
2092   else
2093     Opts.TokenCache = Opts.ImplicitPTHInclude;
2094   Opts.UsePredefines = !Args.hasArg(OPT_undef);
2095   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2096   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2097 
2098   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2099   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
2100          ie = Args.filtered_end(); it != ie; ++it) {
2101     const Arg *A = *it;
2102     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
2103   }
2104 
2105   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2106     StringRef Value(A->getValue(Args));
2107     size_t Comma = Value.find(',');
2108     unsigned Bytes = 0;
2109     unsigned EndOfLine = 0;
2110 
2111     if (Comma == StringRef::npos ||
2112         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2113         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2114       Diags.Report(diag::err_drv_preamble_format);
2115     else {
2116       Opts.PrecompiledPreambleBytes.first = Bytes;
2117       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2118     }
2119   }
2120 
2121   // Add macros from the command line.
2122   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
2123          ie = Args.filtered_end(); it != ie; ++it) {
2124     if ((*it)->getOption().matches(OPT_D))
2125       Opts.addMacroDef((*it)->getValue(Args));
2126     else
2127       Opts.addMacroUndef((*it)->getValue(Args));
2128   }
2129 
2130   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2131 
2132   // Add the ordered list of -includes.
2133   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
2134                                              OPT_include_pth),
2135          ie = Args.filtered_end(); it != ie; ++it) {
2136     const Arg *A = *it;
2137     // PCH is handled specially, we need to extra the original include path.
2138     if (A->getOption().matches(OPT_include_pch)) {
2139       std::string OriginalFile =
2140         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
2141       if (OriginalFile.empty())
2142         continue;
2143 
2144       Opts.Includes.push_back(OriginalFile);
2145     } else
2146       Opts.Includes.push_back(A->getValue(Args));
2147   }
2148 
2149   for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2150          ie = Args.filtered_end(); it != ie; ++it) {
2151     const Arg *A = *it;
2152     Opts.ChainedIncludes.push_back(A->getValue(Args));
2153   }
2154 
2155   // Include 'altivec.h' if -faltivec option present
2156   if (Args.hasArg(OPT_faltivec))
2157     Opts.Includes.push_back("altivec.h");
2158 
2159   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2160          ie = Args.filtered_end(); it != ie; ++it) {
2161     const Arg *A = *it;
2162     std::pair<StringRef,StringRef> Split =
2163       StringRef(A->getValue(Args)).split(';');
2164 
2165     if (Split.second.empty()) {
2166       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2167       continue;
2168     }
2169 
2170     Opts.addRemappedFile(Split.first, Split.second);
2171   }
2172 
2173   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2174     StringRef Name = A->getValue(Args);
2175     unsigned Library = llvm::StringSwitch<unsigned>(Name)
2176       .Case("libc++", ARCXX_libcxx)
2177       .Case("libstdc++", ARCXX_libstdcxx)
2178       .Case("none", ARCXX_nolib)
2179       .Default(~0U);
2180     if (Library == ~0U)
2181       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2182     else
2183       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2184   }
2185 }
2186 
2187 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2188                                         ArgList &Args) {
2189   using namespace options;
2190   Opts.ShowCPP = !Args.hasArg(OPT_dM);
2191   Opts.ShowComments = Args.hasArg(OPT_C);
2192   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2193   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2194   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2195   Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2196 }
2197 
2198 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2199   using namespace options;
2200   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2201   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2202   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2203   Opts.Features = Args.getAllArgValues(OPT_target_feature);
2204   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2205   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2206 
2207   // Use the default target triple if unspecified.
2208   if (Opts.Triple.empty())
2209     Opts.Triple = llvm::sys::getDefaultTargetTriple();
2210 }
2211 
2212 //
2213 
2214 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2215                                         const char *const *ArgBegin,
2216                                         const char *const *ArgEnd,
2217                                         DiagnosticsEngine &Diags) {
2218   bool Success = true;
2219 
2220   // Parse the arguments.
2221   OwningPtr<OptTable> Opts(createDriverOptTable());
2222   unsigned MissingArgIndex, MissingArgCount;
2223   OwningPtr<InputArgList> Args(
2224     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2225 
2226   // Check for missing argument error.
2227   if (MissingArgCount) {
2228     Diags.Report(diag::err_drv_missing_argument)
2229       << Args->getArgString(MissingArgIndex) << MissingArgCount;
2230     Success = false;
2231   }
2232 
2233   // Issue errors on unknown arguments.
2234   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2235          ie = Args->filtered_end(); it != ie; ++it) {
2236     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2237     Success = false;
2238   }
2239 
2240   // Issue errors on arguments that are not valid for CC1.
2241   for (ArgList::iterator I = Args->begin(), E = Args->end();
2242        I != E; ++I) {
2243     if (!(*I)->getOption().isCC1Option()) {
2244       Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
2245       Success = false;
2246     }
2247   }
2248 
2249   Success = ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags) && Success;
2250   Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2251   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2252   Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
2253             && Success;
2254   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2255   // FIXME: We shouldn't have to pass the DashX option around here
2256   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2257   Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2258             && Success;
2259   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2260   if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2261     ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2262     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2263       Res.getLangOpts()->ObjCExceptions = 1;
2264   }
2265   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2266   // PCH file and find the original header name. Remove the need to do that in
2267   // ParsePreprocessorArgs and remove the FileManager
2268   // parameters from the function and the "FileManager.h" #include.
2269   FileManager FileMgr(Res.getFileSystemOpts());
2270   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2271   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2272   ParseTargetArgs(Res.getTargetOpts(), *Args);
2273 
2274   return Success;
2275 }
2276 
2277 namespace {
2278 
2279   class ModuleSignature {
2280     llvm::SmallVector<uint64_t, 16> Data;
2281     unsigned CurBit;
2282     uint64_t CurValue;
2283 
2284   public:
2285     ModuleSignature() : CurBit(0), CurValue(0) { }
2286 
2287     void add(uint64_t Value, unsigned Bits);
2288     void add(StringRef Value);
2289     void flush();
2290 
2291     llvm::APInt getAsInteger() const;
2292   };
2293 }
2294 
2295 void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2296   CurValue |= Value << CurBit;
2297   if (CurBit + NumBits < 64) {
2298     CurBit += NumBits;
2299     return;
2300   }
2301 
2302   // Add the current word.
2303   Data.push_back(CurValue);
2304 
2305   if (CurBit)
2306     CurValue = Value >> (64-CurBit);
2307   else
2308     CurValue = 0;
2309   CurBit = (CurBit+NumBits) & 63;
2310 }
2311 
2312 void ModuleSignature::flush() {
2313   if (CurBit == 0)
2314     return;
2315 
2316   Data.push_back(CurValue);
2317   CurBit = 0;
2318   CurValue = 0;
2319 }
2320 
2321 void ModuleSignature::add(StringRef Value) {
2322   for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2323     add(*I, 8);
2324 }
2325 
2326 llvm::APInt ModuleSignature::getAsInteger() const {
2327   return llvm::APInt(Data.size() * 64, Data);
2328 }
2329 
2330 std::string CompilerInvocation::getModuleHash() const {
2331   ModuleSignature Signature;
2332 
2333   // Start the signature with the compiler version.
2334   // FIXME: The full version string can be quite long.  Omit it from the
2335   // module hash for now to avoid failures where the path name becomes too
2336   // long.  An MD5 or similar checksum would work well here.
2337   // Signature.add(getClangFullRepositoryVersion());
2338 
2339   // Extend the signature with the language options
2340 #define LANGOPT(Name, Bits, Default, Description) \
2341   Signature.add(LangOpts->Name, Bits);
2342 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2343   Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2344 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2345 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2346 #include "clang/Basic/LangOptions.def"
2347 
2348   // Extend the signature with the target triple
2349   llvm::Triple T(TargetOpts.Triple);
2350   Signature.add((unsigned)T.getArch(), 5);
2351   Signature.add((unsigned)T.getVendor(), 4);
2352   Signature.add((unsigned)T.getOS(), 5);
2353   Signature.add((unsigned)T.getEnvironment(), 4);
2354 
2355   // Extend the signature with preprocessor options.
2356   Signature.add(getPreprocessorOpts().UsePredefines, 1);
2357   Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2358 
2359   // Hash the preprocessor defines.
2360   // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2361   std::vector<StringRef> MacroDefs;
2362   for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2363             I = getPreprocessorOpts().Macros.begin(),
2364          IEnd = getPreprocessorOpts().Macros.end();
2365        I != IEnd; ++I) {
2366     if (!I->second)
2367       MacroDefs.push_back(I->first);
2368   }
2369   llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2370 
2371   unsigned PPHashResult = 0;
2372   for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2373     PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2374   Signature.add(PPHashResult, 32);
2375 
2376   // We've generated the signature. Treat it as one large APInt that we'll
2377   // encode in base-36 and return.
2378   Signature.flush();
2379   return Signature.getAsInteger().toString(36, /*Signed=*/false);
2380 }
2381