xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision d3957e57f6591cf80ce5488d9d20fc8e911d4f5b) 
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.EmitOpenCLArgMetadata)
214     Res.push_back("-cl-kernel-arg-info");
215   if (!Opts.MergeAllConstants)
216     Res.push_back("-fno-merge-all-constants");
217   if (Opts.NoCommon)
218     Res.push_back("-fno-common");
219   if (Opts.ForbidGuardVariables)
220     Res.push_back("-fforbid-guard-variables");
221   if (Opts.UseRegisterSizedBitfieldAccess)
222     Res.push_back("-fuse-register-sized-bitfield-access");
223   if (Opts.NoImplicitFloat)
224     Res.push_back("-no-implicit-float");
225   if (Opts.OmitLeafFramePointer)
226     Res.push_back("-momit-leaf-frame-pointer");
227   if (Opts.OptimizeSize) {
228     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
229     Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
230   } else if (Opts.OptimizationLevel != 0)
231     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
232   if (!Opts.MainFileName.empty())
233     Res.push_back("-main-file-name", Opts.MainFileName);
234   if (Opts.NoInfsFPMath)
235     Res.push_back("-menable-no-infinities");
236   if (Opts.NoNaNsFPMath)
237     Res.push_back("-menable-no-nans");
238   // SimplifyLibCalls is only derived.
239   // TimePasses is only derived.
240   // UnitAtATime is unused.
241   // Inlining is only derived.
242 
243   // UnrollLoops is derived, but also accepts an option, no
244   // harm in pushing it back here.
245   if (Opts.UnrollLoops)
246     Res.push_back("-funroll-loops");
247   if (Opts.DataSections)
248     Res.push_back("-fdata-sections");
249   if (Opts.FunctionSections)
250     Res.push_back("-ffunction-sections");
251   if (Opts.AsmVerbose)
252     Res.push_back("-masm-verbose");
253   if (!Opts.CodeModel.empty())
254     Res.push_back("-mcode-model", Opts.CodeModel);
255   if (Opts.CUDAIsDevice)
256     Res.push_back("-fcuda-is-device");
257   if (!Opts.CXAAtExit)
258     Res.push_back("-fno-use-cxa-atexit");
259   if (Opts.CXXCtorDtorAliases)
260     Res.push_back("-mconstructor-aliases");
261   if (Opts.ObjCAutoRefCountExceptions)
262     Res.push_back("-fobjc-arc-eh");
263   if (!Opts.DebugPass.empty()) {
264     Res.push_back("-mdebug-pass", Opts.DebugPass);
265   }
266   if (Opts.DisableFPElim)
267     Res.push_back("-mdisable-fp-elim");
268   if (!Opts.FloatABI.empty())
269     Res.push_back("-mfloat-abi", Opts.FloatABI);
270   if (!Opts.LimitFloatPrecision.empty())
271     Res.push_back("-mlimit-float-precision", Opts.LimitFloatPrecision);
272   if (Opts.NoZeroInitializedInBSS)
273     Res.push_back("-mno-zero-initialized-bss");
274   switch (Opts.getObjCDispatchMethod()) {
275   case CodeGenOptions::Legacy:
276     break;
277   case CodeGenOptions::Mixed:
278     Res.push_back("-fobjc-dispatch-method=mixed");
279     break;
280   case CodeGenOptions::NonLegacy:
281     Res.push_back("-fobjc-dispatch-method=non-legacy");
282     break;
283   }
284   if (Opts.BoundsChecking > 0)
285     Res.push_back("-fbounds-checking=" + llvm::utostr(Opts.BoundsChecking));
286   if (Opts.NumRegisterParameters)
287     Res.push_back("-mregparm", llvm::utostr(Opts.NumRegisterParameters));
288   if (Opts.NoGlobalMerge)
289     Res.push_back("-mno-global-merge");
290   if (Opts.NoExecStack)
291     Res.push_back("-mnoexecstack");
292   if (Opts.RelaxAll)
293     Res.push_back("-mrelax-all");
294   if (Opts.SaveTempLabels)
295     Res.push_back("-msave-temp-labels");
296   if (Opts.NoDwarf2CFIAsm)
297     Res.push_back("-fno-dwarf2-cfi-asm");
298   if (Opts.NoDwarfDirectoryAsm)
299     Res.push_back("-fno-dwarf-directory-asm");
300   if (Opts.SoftFloat)
301     Res.push_back("-msoft-float");
302   if (Opts.StrictEnums)
303     Res.push_back("-fstrict-enums");
304   if (Opts.UnwindTables)
305     Res.push_back("-munwind-tables");
306   if (Opts.RelocationModel != "pic")
307     Res.push_back("-mrelocation-model", Opts.RelocationModel);
308   if (!Opts.VerifyModule)
309     Res.push_back("-disable-llvm-verifier");
310   for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i)
311     Res.push_back("-backend-option", Opts.BackendOptions[i]);
312 
313   switch (Opts.DefaultTLSModel) {
314   case CodeGenOptions::GeneralDynamicTLSModel:
315     break;
316   case CodeGenOptions::LocalDynamicTLSModel:
317     Res.push_back("-ftls-model=local-dynamic");
318     break;
319   case CodeGenOptions::InitialExecTLSModel:
320     Res.push_back("-ftls-model=initial-exec");
321     break;
322   case CodeGenOptions::LocalExecTLSModel:
323     Res.push_back("-ftls-model=local-exec");
324     break;
325   }
326 }
327 
328 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
329                                        ToArgsList &Res) {
330   if (Opts.IncludeSystemHeaders)
331     Res.push_back("-sys-header-deps");
332   if (Opts.ShowHeaderIncludes)
333     Res.push_back("-H");
334   if (!Opts.HeaderIncludeOutputFile.empty())
335     Res.push_back("-header-include-file", Opts.HeaderIncludeOutputFile);
336   if (Opts.UsePhonyTargets)
337     Res.push_back("-MP");
338   if (!Opts.OutputFile.empty())
339     Res.push_back("-dependency-file", Opts.OutputFile);
340   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i)
341     Res.push_back("-MT", Opts.Targets[i]);
342 }
343 
344 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
345                                  ToArgsList &Res) {
346   if (Opts.IgnoreWarnings)
347     Res.push_back("-w");
348   if (Opts.NoRewriteMacros)
349     Res.push_back("-Wno-rewrite-macros");
350   if (Opts.Pedantic)
351     Res.push_back("-pedantic");
352   if (Opts.PedanticErrors)
353     Res.push_back("-pedantic-errors");
354   if (!Opts.ShowColumn)
355     Res.push_back("-fno-show-column");
356   if (!Opts.ShowLocation)
357     Res.push_back("-fno-show-source-location");
358   if (!Opts.ShowCarets)
359     Res.push_back("-fno-caret-diagnostics");
360   if (!Opts.ShowFixits)
361     Res.push_back("-fno-diagnostics-fixit-info");
362   if (Opts.ShowSourceRanges)
363     Res.push_back("-fdiagnostics-print-source-range-info");
364   if (Opts.ShowParseableFixits)
365     Res.push_back("-fdiagnostics-parseable-fixits");
366   if (Opts.ShowColors)
367     Res.push_back("-fcolor-diagnostics");
368   if (Opts.VerifyDiagnostics)
369     Res.push_back("-verify");
370   if (Opts.ShowOptionNames)
371     Res.push_back("-fdiagnostics-show-option");
372   if (Opts.ShowCategories == 1)
373     Res.push_back("-fdiagnostics-show-category=id");
374   else if (Opts.ShowCategories == 2)
375     Res.push_back("-fdiagnostics-show-category=name");
376   switch (Opts.Format) {
377   case DiagnosticOptions::Clang:
378     Res.push_back("-fdiagnostics-format=clang"); break;
379   case DiagnosticOptions::Msvc:
380     Res.push_back("-fdiagnostics-format=msvc");  break;
381   case DiagnosticOptions::Vi:
382     Res.push_back("-fdiagnostics-format=vi");    break;
383   }
384   if (Opts.ErrorLimit)
385     Res.push_back("-ferror-limit", llvm::utostr(Opts.ErrorLimit));
386   if (!Opts.DiagnosticLogFile.empty())
387     Res.push_back("-diagnostic-log-file", Opts.DiagnosticLogFile);
388   if (Opts.MacroBacktraceLimit
389                         != DiagnosticOptions::DefaultMacroBacktraceLimit)
390     Res.push_back("-fmacro-backtrace-limit",
391                   llvm::utostr(Opts.MacroBacktraceLimit));
392   if (Opts.TemplateBacktraceLimit
393                         != DiagnosticOptions::DefaultTemplateBacktraceLimit)
394     Res.push_back("-ftemplate-backtrace-limit",
395                   llvm::utostr(Opts.TemplateBacktraceLimit));
396   if (Opts.ConstexprBacktraceLimit
397                         != DiagnosticOptions::DefaultConstexprBacktraceLimit)
398     Res.push_back("-fconstexpr-backtrace-limit",
399                   llvm::utostr(Opts.ConstexprBacktraceLimit));
400 
401   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop)
402     Res.push_back("-ftabstop", llvm::utostr(Opts.TabStop));
403   if (Opts.MessageLength)
404     Res.push_back("-fmessage-length", llvm::utostr(Opts.MessageLength));
405   if (!Opts.DumpBuildInformation.empty())
406     Res.push_back("-dump-build-information", Opts.DumpBuildInformation);
407   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
408     Res.push_back("-W" + Opts.Warnings[i]);
409 }
410 
411 static const char *getInputKindName(InputKind Kind) {
412   switch (Kind) {
413   case IK_None:              break;
414   case IK_AST:               return "ast";
415   case IK_Asm:               return "assembler-with-cpp";
416   case IK_C:                 return "c";
417   case IK_CXX:               return "c++";
418   case IK_LLVM_IR:           return "ir";
419   case IK_ObjC:              return "objective-c";
420   case IK_ObjCXX:            return "objective-c++";
421   case IK_OpenCL:            return "cl";
422   case IK_CUDA:              return "cuda";
423   case IK_PreprocessedC:     return "cpp-output";
424   case IK_PreprocessedCXX:   return "c++-cpp-output";
425   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
426   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
427   }
428 
429   llvm_unreachable("Unexpected language kind!");
430 }
431 
432 static const char *getActionName(frontend::ActionKind Kind) {
433   switch (Kind) {
434   case frontend::PluginAction:
435     llvm_unreachable("Invalid kind!");
436 
437   case frontend::ASTDump:                return "-ast-dump";
438   case frontend::ASTDumpXML:             return "-ast-dump-xml";
439   case frontend::ASTPrint:               return "-ast-print";
440   case frontend::ASTView:                return "-ast-view";
441   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
442   case frontend::DumpTokens:             return "-dump-tokens";
443   case frontend::EmitAssembly:           return "-S";
444   case frontend::EmitBC:                 return "-emit-llvm-bc";
445   case frontend::EmitHTML:               return "-emit-html";
446   case frontend::EmitLLVM:               return "-emit-llvm";
447   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
448   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
449   case frontend::EmitObj:                return "-emit-obj";
450   case frontend::FixIt:                  return "-fixit";
451   case frontend::GenerateModule:         return "-emit-module";
452   case frontend::GeneratePCH:            return "-emit-pch";
453   case frontend::GeneratePTH:            return "-emit-pth";
454   case frontend::InitOnly:               return "-init-only";
455   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
456   case frontend::PrintDeclContext:       return "-print-decl-contexts";
457   case frontend::PrintPreamble:          return "-print-preamble";
458   case frontend::PrintPreprocessedInput: return "-E";
459   case frontend::RewriteMacros:          return "-rewrite-macros";
460   case frontend::RewriteObjC:            return "-rewrite-objc";
461   case frontend::RewriteTest:            return "-rewrite-test";
462   case frontend::RunAnalysis:            return "-analyze";
463   case frontend::MigrateSource:          return "-migrate";
464   case frontend::RunPreprocessorOnly:    return "-Eonly";
465   }
466 
467   llvm_unreachable("Unexpected language kind!");
468 }
469 
470 static void FileSystemOptsToArgs(const FileSystemOptions &Opts, ToArgsList &Res){
471   if (!Opts.WorkingDir.empty())
472     Res.push_back("-working-directory", Opts.WorkingDir);
473 }
474 
475 static void CodeCompleteOptionsToArgs(const CodeCompleteOptions &Opts,
476                                       ToArgsList &Res) {
477   if (Opts.IncludeMacros)
478     Res.push_back("-code-completion-macros");
479   if (Opts.IncludeCodePatterns)
480     Res.push_back("-code-completion-patterns");
481   if (!Opts.IncludeGlobals)
482     Res.push_back("-no-code-completion-globals");
483   if (Opts.IncludeBriefComments)
484     Res.push_back("-code-completion-brief-comments");
485 }
486 
487 static void FrontendOptsToArgs(const FrontendOptions &Opts, ToArgsList &Res) {
488   if (Opts.DisableFree)
489     Res.push_back("-disable-free");
490   if (Opts.RelocatablePCH)
491     Res.push_back("-relocatable-pch");
492   if (Opts.ShowHelp)
493     Res.push_back("-help");
494   if (Opts.ShowStats)
495     Res.push_back("-print-stats");
496   if (Opts.ShowTimers)
497     Res.push_back("-ftime-report");
498   if (Opts.ShowVersion)
499     Res.push_back("-version");
500   if (Opts.FixWhatYouCan)
501     Res.push_back("-fix-what-you-can");
502   if (Opts.FixOnlyWarnings)
503     Res.push_back("-fix-only-warnings");
504   if (Opts.FixAndRecompile)
505     Res.push_back("-fixit-recompile");
506   if (Opts.FixToTemporaries)
507     Res.push_back("-fixit-to-temporary");
508   switch (Opts.ARCMTAction) {
509   case FrontendOptions::ARCMT_None:
510     break;
511   case FrontendOptions::ARCMT_Check:
512     Res.push_back("-arcmt-check");
513     break;
514   case FrontendOptions::ARCMT_Modify:
515     Res.push_back("-arcmt-modify");
516     break;
517   case FrontendOptions::ARCMT_Migrate:
518     Res.push_back("-arcmt-migrate");
519     break;
520   }
521   CodeCompleteOptionsToArgs(Opts.CodeCompleteOpts, Res);
522   if (!Opts.MTMigrateDir.empty())
523     Res.push_back("-mt-migrate-directory", Opts.MTMigrateDir);
524   if (!Opts.ARCMTMigrateReportOut.empty())
525     Res.push_back("-arcmt-migrate-report-output", Opts.ARCMTMigrateReportOut);
526   if (Opts.ARCMTMigrateEmitARCErrors)
527     Res.push_back("-arcmt-migrate-emit-errors");
528 
529   if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals)
530     Res.push_back("-objcmt-migrate-literals");
531   if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting)
532     Res.push_back("-objcmt-migrate-subscripting");
533 
534   bool NeedLang = false;
535   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
536     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
537         Opts.Inputs[i].Kind)
538       NeedLang = true;
539   if (NeedLang)
540     Res.push_back("-x", getInputKindName(Opts.Inputs[0].Kind));
541   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
542     assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
543            "Unable to represent this input vector!");
544     Res.push_back(Opts.Inputs[i].File);
545   }
546 
547   if (!Opts.OutputFile.empty())
548     Res.push_back("-o", Opts.OutputFile);
549   if (!Opts.CodeCompletionAt.FileName.empty())
550     Res.push_back("-code-completion-at",
551                   Opts.CodeCompletionAt.FileName + ":" +
552                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
553                   llvm::utostr(Opts.CodeCompletionAt.Column));
554   if (Opts.ProgramAction != frontend::PluginAction)
555     Res.push_back(getActionName(Opts.ProgramAction));
556   if (!Opts.ActionName.empty()) {
557     Res.push_back("-plugin", Opts.ActionName);
558     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i)
559       Res.push_back("-plugin-arg-" + Opts.ActionName, Opts.PluginArgs[i]);
560   }
561   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i)
562     Res.push_back("-load", Opts.Plugins[i]);
563   for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
564     Res.push_back("-add-plugin", Opts.AddPluginActions[i]);
565     for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai)
566       Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i],
567                     Opts.AddPluginArgs[i][ai]);
568   }
569   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i)
570     Res.push_back("-ast-merge", Opts.ASTMergeFiles[i]);
571   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i)
572     Res.push_back("-mllvm", Opts.LLVMArgs[i]);
573   if (!Opts.OverrideRecordLayoutsFile.empty())
574     Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
575 }
576 
577 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
578                                    ToArgsList &Res) {
579   if (Opts.Sysroot != "/") {
580     Res.push_back("-isysroot");
581     Res.push_back(Opts.Sysroot);
582   }
583 
584   /// User specified include entries.
585   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
586     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
587     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
588       llvm::report_fatal_error("Invalid option set!");
589     if (E.IsUserSupplied) {
590       switch (E.Group) {
591       case frontend::After:
592         Res.push_back("-idirafter");
593         break;
594 
595       case frontend::Quoted:
596         Res.push_back("-iquote");
597         break;
598 
599       case frontend::System:
600         Res.push_back("-isystem");
601         break;
602 
603       case frontend::IndexHeaderMap:
604         Res.push_back("-index-header-map");
605         Res.push_back(E.IsFramework? "-F" : "-I");
606         break;
607 
608       case frontend::CSystem:
609         Res.push_back("-c-isystem");
610         break;
611 
612       case frontend::CXXSystem:
613         Res.push_back("-cxx-isystem");
614         break;
615 
616       case frontend::ObjCSystem:
617         Res.push_back("-objc-isystem");
618         break;
619 
620       case frontend::ObjCXXSystem:
621         Res.push_back("-objcxx-isystem");
622         break;
623 
624       case frontend::Angled:
625         Res.push_back(E.IsFramework ? "-F" : "-I");
626         break;
627       }
628     } else {
629       if (E.IsInternal) {
630         assert(E.Group == frontend::System && "Unexpected header search group");
631         if (E.ImplicitExternC)
632           Res.push_back("-internal-externc-isystem");
633         else
634           Res.push_back("-internal-isystem");
635       } else {
636         if (E.Group != frontend::Angled && E.Group != frontend::System)
637           llvm::report_fatal_error("Invalid option set!");
638         Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
639                       "-iwithprefix");
640       }
641     }
642     Res.push_back(E.Path);
643   }
644 
645   /// User-specified system header prefixes.
646   for (unsigned i = 0, e = Opts.SystemHeaderPrefixes.size(); i != e; ++i) {
647     if (Opts.SystemHeaderPrefixes[i].IsSystemHeader)
648       Res.push_back("-isystem-prefix");
649     else
650       Res.push_back("-ino-system-prefix");
651 
652     Res.push_back(Opts.SystemHeaderPrefixes[i].Prefix);
653   }
654 
655   if (!Opts.ResourceDir.empty())
656     Res.push_back("-resource-dir", Opts.ResourceDir);
657   if (!Opts.ModuleCachePath.empty())
658     Res.push_back("-fmodule-cache-path", Opts.ModuleCachePath);
659   if (!Opts.UseStandardSystemIncludes)
660     Res.push_back("-nostdsysteminc");
661   if (!Opts.UseStandardCXXIncludes)
662     Res.push_back("-nostdinc++");
663   if (Opts.UseLibcxx)
664     Res.push_back("-stdlib=libc++");
665   if (Opts.Verbose)
666     Res.push_back("-v");
667 }
668 
669 static void LangOptsToArgs(const LangOptions &Opts, ToArgsList &Res) {
670   LangOptions DefaultLangOpts;
671 
672   // FIXME: Need to set -std to get all the implicit options.
673 
674   // FIXME: We want to only pass options relative to the defaults, which
675   // requires constructing a target. :(
676   //
677   // It would be better to push the all target specific choices into the driver,
678   // so that everything below that was more uniform.
679 
680   if (Opts.Trigraphs)
681     Res.push_back("-trigraphs");
682   // Implicit based on the input kind:
683   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
684   // Implicit based on the input language standard:
685   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
686   if (Opts.DollarIdents)
687     Res.push_back("-fdollars-in-identifiers");
688   if (Opts.GNUMode && !Opts.GNUKeywords)
689     Res.push_back("-fno-gnu-keywords");
690   if (!Opts.GNUMode && Opts.GNUKeywords)
691     Res.push_back("-fgnu-keywords");
692   if (Opts.MicrosoftExt)
693     Res.push_back("-fms-extensions");
694   if (Opts.MicrosoftMode)
695     Res.push_back("-fms-compatibility");
696   if (Opts.MSCVersion != 0)
697     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
698   if (Opts.Borland)
699     Res.push_back("-fborland-extensions");
700   if (Opts.ObjCDefaultSynthProperties)
701     Res.push_back("-fobjc-default-synthesize-properties");
702   // NoInline is implicit.
703   if (!Opts.CXXOperatorNames)
704     Res.push_back("-fno-operator-names");
705   if (Opts.PascalStrings)
706     Res.push_back("-fpascal-strings");
707   if (Opts.CatchUndefined)
708     Res.push_back("-fcatch-undefined-behavior");
709   if (Opts.AddressSanitizer)
710     Res.push_back("-faddress-sanitizer");
711   if (Opts.ThreadSanitizer)
712     Res.push_back("-fthread-sanitizer");
713   if (Opts.WritableStrings)
714     Res.push_back("-fwritable-strings");
715   if (Opts.ConstStrings)
716     Res.push_back("-fconst-strings");
717   if (!Opts.LaxVectorConversions)
718     Res.push_back("-fno-lax-vector-conversions");
719   if (Opts.AltiVec)
720     Res.push_back("-faltivec");
721   if (Opts.Exceptions)
722     Res.push_back("-fexceptions");
723   if (Opts.ObjCExceptions)
724     Res.push_back("-fobjc-exceptions");
725   if (Opts.CXXExceptions)
726     Res.push_back("-fcxx-exceptions");
727   if (Opts.SjLjExceptions)
728     Res.push_back("-fsjlj-exceptions");
729   if (Opts.TraditionalCPP)
730     Res.push_back("-traditional-cpp");
731   if (!Opts.RTTI)
732     Res.push_back("-fno-rtti");
733   if (Opts.MSBitfields)
734     Res.push_back("-mms-bitfields");
735   if (Opts.Freestanding)
736     Res.push_back("-ffreestanding");
737   if (Opts.NoBuiltin)
738     Res.push_back("-fno-builtin");
739   if (!Opts.AssumeSaneOperatorNew)
740     Res.push_back("-fno-assume-sane-operator-new");
741   if (!Opts.ThreadsafeStatics)
742     Res.push_back("-fno-threadsafe-statics");
743   if (Opts.POSIXThreads)
744     Res.push_back("-pthread");
745   if (Opts.Blocks)
746     Res.push_back("-fblocks");
747   if (Opts.BlocksRuntimeOptional)
748     Res.push_back("-fblocks-runtime-optional");
749   if (Opts.Modules)
750     Res.push_back("-fmodules");
751   if (Opts.EmitAllDecls)
752     Res.push_back("-femit-all-decls");
753   if (Opts.MathErrno)
754     Res.push_back("-fmath-errno");
755   switch (Opts.getSignedOverflowBehavior()) {
756   case LangOptions::SOB_Undefined: break;
757   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
758   case LangOptions::SOB_Trapping:
759     Res.push_back("-ftrapv");
760     if (!Opts.OverflowHandler.empty())
761       Res.push_back("-ftrapv-handler", Opts.OverflowHandler);
762     break;
763   }
764   switch (Opts.getFPContractMode()) {
765   case LangOptions::FPC_Off:  Res.push_back("-ffp-contract=off"); break;
766   case LangOptions::FPC_On:   Res.push_back("-ffp-contract=on"); break;
767   case LangOptions::FPC_Fast: Res.push_back("-ffp-contract=fast"); break;
768   }
769   if (Opts.HeinousExtensions)
770     Res.push_back("-fheinous-gnu-extensions");
771   // Optimize is implicit.
772   // OptimizeSize is implicit.
773   if (Opts.FastMath)
774     Res.push_back("-ffast-math");
775   if (Opts.Static)
776     Res.push_back("-static-define");
777   if (Opts.DumpRecordLayoutsSimple)
778     Res.push_back("-fdump-record-layouts-simple");
779   else if (Opts.DumpRecordLayouts)
780     Res.push_back("-fdump-record-layouts");
781   if (Opts.DumpVTableLayouts)
782     Res.push_back("-fdump-vtable-layouts");
783   if (Opts.NoBitFieldTypeAlign)
784     Res.push_back("-fno-bitfield-type-alignment");
785   if (Opts.PICLevel)
786     Res.push_back("-pic-level", llvm::utostr(Opts.PICLevel));
787   if (Opts.PIELevel)
788     Res.push_back("-pie-level", llvm::utostr(Opts.PIELevel));
789   if (Opts.ObjCGCBitmapPrint)
790     Res.push_back("-print-ivar-layout");
791   if (Opts.NoConstantCFStrings)
792     Res.push_back("-fno-constant-cfstrings");
793   if (!Opts.AccessControl)
794     Res.push_back("-fno-access-control");
795   if (!Opts.CharIsSigned)
796     Res.push_back("-fno-signed-char");
797   if (Opts.ShortWChar)
798     Res.push_back("-fshort-wchar");
799   if (!Opts.ElideConstructors)
800     Res.push_back("-fno-elide-constructors");
801   if (Opts.getGC() != LangOptions::NonGC) {
802     if (Opts.getGC() == LangOptions::HybridGC) {
803       Res.push_back("-fobjc-gc");
804     } else {
805       assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
806       Res.push_back("-fobjc-gc-only");
807     }
808   }
809   Res.push_back("-fobjc-runtime=" + Opts.ObjCRuntime.getAsString());
810   if (Opts.ObjCAutoRefCount)
811     Res.push_back("-fobjc-arc");
812   if (Opts.ObjCRuntimeHasWeak)
813     Res.push_back("-fobjc-runtime-has-weak");
814   if (!Opts.ObjCInferRelatedResultType)
815     Res.push_back("-fno-objc-infer-related-result-type");
816 
817   if (Opts.AppleKext)
818     Res.push_back("-fapple-kext");
819 
820   if (Opts.getVisibilityMode() != DefaultVisibility) {
821     Res.push_back("-fvisibility");
822     if (Opts.getVisibilityMode() == HiddenVisibility) {
823       Res.push_back("hidden");
824     } else {
825       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
826              "Invalid visibility!");
827       Res.push_back("protected");
828     }
829   }
830   if (Opts.InlineVisibilityHidden)
831     Res.push_back("-fvisibility-inlines-hidden");
832 
833   if (Opts.getStackProtector() != 0)
834     Res.push_back("-stack-protector", llvm::utostr(Opts.getStackProtector()));
835   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth)
836     Res.push_back("-ftemplate-depth", llvm::utostr(Opts.InstantiationDepth));
837   if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth)
838     Res.push_back("-fconstexpr-depth", llvm::utostr(Opts.ConstexprCallDepth));
839   if (!Opts.ObjCConstantStringClass.empty())
840     Res.push_back("-fconstant-string-class", Opts.ObjCConstantStringClass);
841   if (Opts.FakeAddressSpaceMap)
842     Res.push_back("-ffake-address-space-map");
843   if (Opts.ParseUnknownAnytype)
844     Res.push_back("-funknown-anytype");
845   if (Opts.DebuggerSupport)
846     Res.push_back("-fdebugger-support");
847   if (Opts.DebuggerCastResultToId)
848     Res.push_back("-fdebugger-cast-result-to-id");
849   if (Opts.DebuggerObjCLiteral)
850     Res.push_back("-fdebugger-objc-literal");
851   if (Opts.DelayedTemplateParsing)
852     Res.push_back("-fdelayed-template-parsing");
853   if (Opts.Deprecated)
854     Res.push_back("-fdeprecated-macro");
855   if (Opts.ApplePragmaPack)
856     Res.push_back("-fapple-pragma-pack");
857   if (!Opts.CurrentModule.empty())
858     Res.push_back("-fmodule-name=" + Opts.CurrentModule);
859 }
860 
861 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
862                                    ToArgsList &Res) {
863   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
864     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
865                   Opts.Macros[i].first);
866   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
867     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
868     Res.push_back("-include", Opts.Includes[i]);
869   }
870   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i)
871     Res.push_back("-imacros", Opts.MacroIncludes[i]);
872   if (!Opts.UsePredefines)
873     Res.push_back("-undef");
874   if (Opts.DetailedRecord)
875     Res.push_back("-detailed-preprocessing-record");
876   if (!Opts.ImplicitPCHInclude.empty())
877     Res.push_back("-include-pch", Opts.ImplicitPCHInclude);
878   if (!Opts.ImplicitPTHInclude.empty())
879     Res.push_back("-include-pth", Opts.ImplicitPTHInclude);
880   if (!Opts.TokenCache.empty()) {
881     if (Opts.ImplicitPTHInclude.empty())
882       Res.push_back("-token-cache", Opts.TokenCache);
883     else
884       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
885              "Unsupported option combination!");
886   }
887   for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i)
888     Res.push_back("-chain-include", Opts.ChainedIncludes[i]);
889   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
890     Res.push_back("-remap-file", Opts.RemappedFiles[i].first + ";" +
891                                  Opts.RemappedFiles[i].second);
892   }
893 }
894 
895 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
896                                          ToArgsList &Res) {
897   if (!Opts.ShowCPP && !Opts.ShowMacros)
898     llvm::report_fatal_error("Invalid option combination!");
899 
900   if (Opts.ShowCPP && Opts.ShowMacros)
901     Res.push_back("-dD");
902   else if (!Opts.ShowCPP && Opts.ShowMacros)
903     Res.push_back("-dM");
904 
905   if (!Opts.ShowLineMarkers)
906     Res.push_back("-P");
907   if (Opts.ShowComments)
908     Res.push_back("-C");
909   if (Opts.ShowMacroComments)
910     Res.push_back("-CC");
911 }
912 
913 static void TargetOptsToArgs(const TargetOptions &Opts,
914                              ToArgsList &Res) {
915   Res.push_back("-triple");
916   Res.push_back(Opts.Triple);
917   if (!Opts.CPU.empty())
918     Res.push_back("-target-cpu", Opts.CPU);
919   if (!Opts.ABI.empty())
920     Res.push_back("-target-abi", Opts.ABI);
921   if (!Opts.LinkerVersion.empty())
922     Res.push_back("-target-linker-version", Opts.LinkerVersion);
923   if (!Opts.CXXABI.empty())
924     Res.push_back("-cxx-abi", Opts.CXXABI);
925   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i)
926     Res.push_back("-target-feature", Opts.Features[i]);
927 }
928 
929 void CompilerInvocation::toArgs(std::vector<std::string> &Res) const {
930   ToArgsList List(Res);
931   AnalyzerOptsToArgs(getAnalyzerOpts(), List);
932   CodeGenOptsToArgs(getCodeGenOpts(), List);
933   DependencyOutputOptsToArgs(getDependencyOutputOpts(), List);
934   DiagnosticOptsToArgs(getDiagnosticOpts(), List);
935   FileSystemOptsToArgs(getFileSystemOpts(), List);
936   FrontendOptsToArgs(getFrontendOpts(), List);
937   HeaderSearchOptsToArgs(getHeaderSearchOpts(), List);
938   LangOptsToArgs(*getLangOpts(), List);
939   PreprocessorOptsToArgs(getPreprocessorOpts(), List);
940   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), List);
941   TargetOptsToArgs(getTargetOpts(), List);
942 }
943 
944 //===----------------------------------------------------------------------===//
945 // Deserialization (to args)
946 //===----------------------------------------------------------------------===//
947 
948 using namespace clang::driver;
949 using namespace clang::driver::options;
950 
951 //
952 
953 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
954                                      DiagnosticsEngine &Diags) {
955   unsigned DefaultOpt = 0;
956   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
957     DefaultOpt = 2;
958 
959   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
960     if (A->getOption().matches(options::OPT_O0))
961       return 0;
962 
963     assert (A->getOption().matches(options::OPT_O));
964 
965     llvm::StringRef S(A->getValue(Args));
966     if (S == "s" || S == "z" || S.empty())
967       return 2;
968 
969     return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
970   }
971 
972   return DefaultOpt;
973 }
974 
975 static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
976                                          DiagnosticsEngine &Diags) {
977   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
978     if (A->getOption().matches(options::OPT_O)) {
979       switch (A->getValue(Args)[0]) {
980       default:
981         return 0;
982       case 's':
983         return 1;
984       case 'z':
985         return 2;
986       }
987     }
988   }
989   return 0;
990 }
991 
992 static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
993   for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
994          E = Args.filtered_end(); I != E; ++I) {
995     Arg *A = *I;
996     // If the argument is a pure flag, add its name (minus the "-W" at the beginning)
997     // to the warning list. Else, add its value (for the OPT_W case).
998     if (A->getOption().getKind() == Option::FlagClass) {
999       Warnings.push_back(A->getOption().getName().substr(2));
1000     } else {
1001       for (unsigned Idx = 0, End = A->getNumValues();
1002            Idx < End; ++Idx) {
1003         StringRef V = A->getValue(Args, Idx);
1004         // "-Wl," and such are not warning options.
1005         // FIXME: Should be handled by putting these in separate flags.
1006         if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
1007           continue;
1008 
1009         Warnings.push_back(V);
1010       }
1011     }
1012   }
1013 }
1014 
1015 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
1016                               DiagnosticsEngine &Diags) {
1017   using namespace options;
1018   bool Success = true;
1019   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
1020     StringRef Name = A->getValue(Args);
1021     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
1022 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
1023       .Case(CMDFLAG, NAME##Model)
1024 #include "clang/Frontend/Analyses.def"
1025       .Default(NumStores);
1026     if (Value == NumStores) {
1027       Diags.Report(diag::err_drv_invalid_value)
1028         << A->getAsString(Args) << Name;
1029       Success = false;
1030     } else {
1031       Opts.AnalysisStoreOpt = Value;
1032     }
1033   }
1034 
1035   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
1036     StringRef Name = A->getValue(Args);
1037     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
1038 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
1039       .Case(CMDFLAG, NAME##Model)
1040 #include "clang/Frontend/Analyses.def"
1041       .Default(NumConstraints);
1042     if (Value == NumConstraints) {
1043       Diags.Report(diag::err_drv_invalid_value)
1044         << A->getAsString(Args) << Name;
1045       Success = false;
1046     } else {
1047       Opts.AnalysisConstraintsOpt = Value;
1048     }
1049   }
1050 
1051   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1052     StringRef Name = A->getValue(Args);
1053     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1054 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1055       .Case(CMDFLAG, PD_##NAME)
1056 #include "clang/Frontend/Analyses.def"
1057       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1058     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1059       Diags.Report(diag::err_drv_invalid_value)
1060         << A->getAsString(Args) << Name;
1061       Success = false;
1062     } else {
1063       Opts.AnalysisDiagOpt = Value;
1064     }
1065   }
1066 
1067   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1068     StringRef Name = A->getValue(Args);
1069     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1070 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1071       .Case(CMDFLAG, NAME)
1072 #include "clang/Frontend/Analyses.def"
1073       .Default(NumPurgeModes);
1074     if (Value == NumPurgeModes) {
1075       Diags.Report(diag::err_drv_invalid_value)
1076         << A->getAsString(Args) << Name;
1077       Success = false;
1078     } else {
1079       Opts.AnalysisPurgeOpt = Value;
1080     }
1081   }
1082 
1083   if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
1084     StringRef Name = A->getValue(Args);
1085     AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
1086 #define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
1087       .Case(CMDFLAG, NAME)
1088 #include "clang/Frontend/Analyses.def"
1089       .Default(NumIPAModes);
1090     if (Value == NumIPAModes) {
1091       Diags.Report(diag::err_drv_invalid_value)
1092         << A->getAsString(Args) << Name;
1093       Success = false;
1094     } else {
1095       Opts.IPAMode = Value;
1096     }
1097   }
1098 
1099   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
1100     StringRef Name = A->getValue(Args);
1101     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
1102 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
1103       .Case(CMDFLAG, NAME)
1104 #include "clang/Frontend/Analyses.def"
1105       .Default(NumInliningModes);
1106     if (Value == NumInliningModes) {
1107       Diags.Report(diag::err_drv_invalid_value)
1108         << A->getAsString(Args) << Name;
1109       Success = false;
1110     } else {
1111       Opts.InliningMode = Value;
1112     }
1113   }
1114 
1115   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1116   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1117   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1118   Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
1119   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1120   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1121   Opts.AnalyzeNestedBlocks =
1122     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1123   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
1124   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1125   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1126   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
1127   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
1128   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1129   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1130   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1131   Opts.EagerlyTrimEGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1132   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1133   Opts.InlineMaxStackDepth =
1134     Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1135                             Opts.InlineMaxStackDepth, Diags);
1136   Opts.InlineMaxFunctionSize =
1137     Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1138                             Opts.InlineMaxFunctionSize, Diags);
1139 
1140   Opts.CheckersControlList.clear();
1141   for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1142                                              OPT_analyzer_disable_checker),
1143          ie = Args.filtered_end(); it != ie; ++it) {
1144     const Arg *A = *it;
1145     A->claim();
1146     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1147     // We can have a list of comma separated checker names, e.g:
1148     // '-analyzer-checker=cocoa,unix'
1149     StringRef checkerList = A->getValue(Args);
1150     SmallVector<StringRef, 4> checkers;
1151     checkerList.split(checkers, ",");
1152     for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1153       Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1154   }
1155 
1156   return Success;
1157 }
1158 
1159 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1160   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1161   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1162   return true;
1163 }
1164 
1165 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1166                              DiagnosticsEngine &Diags) {
1167   using namespace options;
1168   bool Success = true;
1169 
1170   unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1171   if (OptLevel > 3) {
1172     Diags.Report(diag::err_drv_invalid_value)
1173       << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1174     OptLevel = 3;
1175     Success = false;
1176   }
1177   Opts.OptimizationLevel = OptLevel;
1178 
1179   // We must always run at least the always inlining pass.
1180   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1181     : CodeGenOptions::OnlyAlwaysInlining;
1182   // -fno-inline-functions overrides OptimizationLevel > 1.
1183   Opts.NoInline = Args.hasArg(OPT_fno_inline);
1184   Opts.Inlining = Args.hasArg(OPT_fno_inline_functions) ?
1185     CodeGenOptions::OnlyAlwaysInlining : Opts.Inlining;
1186 
1187   if (Args.hasArg(OPT_gline_tables_only)) {
1188     Opts.DebugInfo = CodeGenOptions::DebugLineTablesOnly;
1189   } else if (Args.hasArg(OPT_g_Flag)) {
1190     if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
1191       Opts.DebugInfo = CodeGenOptions::LimitedDebugInfo;
1192     else
1193       Opts.DebugInfo = CodeGenOptions::FullDebugInfo;
1194   }
1195 
1196   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1197   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1198   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1199   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1200     OPT_fuse_register_sized_bitfield_access);
1201   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1202   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1203   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1204   Opts.NoCommon = Args.hasArg(OPT_fno_common);
1205   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1206   Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
1207   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1208                             Args.hasArg(OPT_ffreestanding));
1209   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1210                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1211 
1212   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1213   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1214   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1215   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1216   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1217   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1218   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1219   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1220   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1221   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1222   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1223   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1224   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1225   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1226                        Args.hasArg(OPT_cl_finite_math_only)||
1227                        Args.hasArg(OPT_cl_fast_relaxed_math));
1228   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1229                        Args.hasArg(OPT_cl_finite_math_only)||
1230                        Args.hasArg(OPT_cl_fast_relaxed_math));
1231   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1232   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1233   Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1234   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1235   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1236   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1237   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1238   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1239   Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1240   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1241   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1242   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
1243   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1244                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1245                       Args.hasArg(OPT_cl_fast_relaxed_math);
1246   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1247   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1248   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1249   Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
1250                                                 Diags);
1251   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
1252 
1253   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1254   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1255 
1256   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1257   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1258 
1259   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1260   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1261   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1262   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1263   Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
1264   Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
1265   Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1266   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1267   Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1268   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1269   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1270     StringRef Val = A->getValue(Args);
1271     Val.getAsInteger(10, Opts.StackAlignment);
1272   }
1273 
1274   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1275     StringRef Name = A->getValue(Args);
1276     unsigned Method = llvm::StringSwitch<unsigned>(Name)
1277       .Case("legacy", CodeGenOptions::Legacy)
1278       .Case("non-legacy", CodeGenOptions::NonLegacy)
1279       .Case("mixed", CodeGenOptions::Mixed)
1280       .Default(~0U);
1281     if (Method == ~0U) {
1282       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1283       Success = false;
1284     } else {
1285       Opts.ObjCDispatchMethod = Method;
1286     }
1287   }
1288 
1289   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1290     StringRef Name = A->getValue(Args);
1291     unsigned Model = llvm::StringSwitch<unsigned>(Name)
1292         .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1293         .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1294         .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1295         .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1296         .Default(~0U);
1297     if (Model == ~0U) {
1298       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1299       Success = false;
1300     } else {
1301       Opts.DefaultTLSModel = static_cast<CodeGenOptions::TLSModel>(Model);
1302     }
1303   }
1304 
1305   return Success;
1306 }
1307 
1308 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1309                                       ArgList &Args) {
1310   using namespace options;
1311   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1312   Opts.Targets = Args.getAllArgValues(OPT_MT);
1313   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1314   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1315   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1316   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1317   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1318   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1319 }
1320 
1321 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1322                                 DiagnosticsEngine *Diags) {
1323   using namespace options;
1324   bool Success = true;
1325 
1326   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1327   Opts.DiagnosticSerializationFile =
1328     Args.getLastArgValue(OPT_diagnostic_serialized_file);
1329   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1330   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1331   Opts.Pedantic = Args.hasArg(OPT_pedantic);
1332   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1333   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1334   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1335   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1336                                  OPT_fno_show_column,
1337                                  /*Default=*/true);
1338   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1339   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1340   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1341 
1342   // Default behavior is to not to show note include stacks.
1343   Opts.ShowNoteIncludeStack = false;
1344   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1345                                OPT_fno_diagnostics_show_note_include_stack))
1346     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1347       Opts.ShowNoteIncludeStack = true;
1348 
1349   StringRef ShowOverloads =
1350     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1351   if (ShowOverloads == "best")
1352     Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1353   else if (ShowOverloads == "all")
1354     Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1355   else {
1356     Success = false;
1357     if (Diags)
1358       Diags->Report(diag::err_drv_invalid_value)
1359       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1360       << ShowOverloads;
1361   }
1362 
1363   StringRef ShowCategory =
1364     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1365   if (ShowCategory == "none")
1366     Opts.ShowCategories = 0;
1367   else if (ShowCategory == "id")
1368     Opts.ShowCategories = 1;
1369   else if (ShowCategory == "name")
1370     Opts.ShowCategories = 2;
1371   else {
1372     Success = false;
1373     if (Diags)
1374       Diags->Report(diag::err_drv_invalid_value)
1375       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1376       << ShowCategory;
1377   }
1378 
1379   StringRef Format =
1380     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1381   if (Format == "clang")
1382     Opts.Format = DiagnosticOptions::Clang;
1383   else if (Format == "msvc")
1384     Opts.Format = DiagnosticOptions::Msvc;
1385   else if (Format == "vi")
1386     Opts.Format = DiagnosticOptions::Vi;
1387   else {
1388     Success = false;
1389     if (Diags)
1390       Diags->Report(diag::err_drv_invalid_value)
1391       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1392       << Format;
1393   }
1394 
1395   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1396   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1397   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1398   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1399   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1400   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1401   Opts.MacroBacktraceLimit
1402     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1403                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1404   Opts.TemplateBacktraceLimit
1405     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1406                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
1407                          Diags);
1408   Opts.ConstexprBacktraceLimit
1409     = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1410                          DiagnosticOptions::DefaultConstexprBacktraceLimit,
1411                          Diags);
1412   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1413                                     DiagnosticOptions::DefaultTabStop, Diags);
1414   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1415     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1416     if (Diags)
1417       Diags->Report(diag::warn_ignoring_ftabstop_value)
1418       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1419   }
1420   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1421   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1422   addWarningArgs(Args, Opts.Warnings);
1423 
1424   return Success;
1425 }
1426 
1427 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1428   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1429 }
1430 
1431 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1432                                    DiagnosticsEngine &Diags) {
1433   using namespace options;
1434   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1435   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1436     switch (A->getOption().getID()) {
1437     default:
1438       llvm_unreachable("Invalid option in group!");
1439     case OPT_ast_dump:
1440       Opts.ProgramAction = frontend::ASTDump; break;
1441     case OPT_ast_dump_xml:
1442       Opts.ProgramAction = frontend::ASTDumpXML; break;
1443     case OPT_ast_print:
1444       Opts.ProgramAction = frontend::ASTPrint; break;
1445     case OPT_ast_view:
1446       Opts.ProgramAction = frontend::ASTView; break;
1447     case OPT_dump_raw_tokens:
1448       Opts.ProgramAction = frontend::DumpRawTokens; break;
1449     case OPT_dump_tokens:
1450       Opts.ProgramAction = frontend::DumpTokens; break;
1451     case OPT_S:
1452       Opts.ProgramAction = frontend::EmitAssembly; break;
1453     case OPT_emit_llvm_bc:
1454       Opts.ProgramAction = frontend::EmitBC; break;
1455     case OPT_emit_html:
1456       Opts.ProgramAction = frontend::EmitHTML; break;
1457     case OPT_emit_llvm:
1458       Opts.ProgramAction = frontend::EmitLLVM; break;
1459     case OPT_emit_llvm_only:
1460       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1461     case OPT_emit_codegen_only:
1462       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1463     case OPT_emit_obj:
1464       Opts.ProgramAction = frontend::EmitObj; break;
1465     case OPT_fixit_EQ:
1466       Opts.FixItSuffix = A->getValue(Args);
1467       // fall-through!
1468     case OPT_fixit:
1469       Opts.ProgramAction = frontend::FixIt; break;
1470     case OPT_emit_module:
1471       Opts.ProgramAction = frontend::GenerateModule; break;
1472     case OPT_emit_pch:
1473       Opts.ProgramAction = frontend::GeneratePCH; break;
1474     case OPT_emit_pth:
1475       Opts.ProgramAction = frontend::GeneratePTH; break;
1476     case OPT_init_only:
1477       Opts.ProgramAction = frontend::InitOnly; break;
1478     case OPT_fsyntax_only:
1479       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1480     case OPT_print_decl_contexts:
1481       Opts.ProgramAction = frontend::PrintDeclContext; break;
1482     case OPT_print_preamble:
1483       Opts.ProgramAction = frontend::PrintPreamble; break;
1484     case OPT_E:
1485       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1486     case OPT_rewrite_macros:
1487       Opts.ProgramAction = frontend::RewriteMacros; break;
1488     case OPT_rewrite_objc:
1489       Opts.ProgramAction = frontend::RewriteObjC; break;
1490     case OPT_rewrite_test:
1491       Opts.ProgramAction = frontend::RewriteTest; break;
1492     case OPT_analyze:
1493       Opts.ProgramAction = frontend::RunAnalysis; break;
1494     case OPT_migrate:
1495       Opts.ProgramAction = frontend::MigrateSource; break;
1496     case OPT_Eonly:
1497       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1498     }
1499   }
1500 
1501   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1502     Opts.Plugins.push_back(A->getValue(Args,0));
1503     Opts.ProgramAction = frontend::PluginAction;
1504     Opts.ActionName = A->getValue(Args);
1505 
1506     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1507            end = Args.filtered_end(); it != end; ++it) {
1508       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1509         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1510     }
1511   }
1512 
1513   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1514   Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1515   for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1516     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1517            end = Args.filtered_end(); it != end; ++it) {
1518       if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1519         Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1520     }
1521   }
1522 
1523   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1524     Opts.CodeCompletionAt =
1525       ParsedSourceLocation::FromString(A->getValue(Args));
1526     if (Opts.CodeCompletionAt.FileName.empty())
1527       Diags.Report(diag::err_drv_invalid_value)
1528         << A->getAsString(Args) << A->getValue(Args);
1529   }
1530   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1531 
1532   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1533   Opts.Plugins = Args.getAllArgValues(OPT_load);
1534   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1535   Opts.ShowHelp = Args.hasArg(OPT_help);
1536   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1537   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1538   Opts.ShowVersion = Args.hasArg(OPT_version);
1539   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1540   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1541   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1542   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1543   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1544   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1545 
1546   Opts.CodeCompleteOpts.IncludeMacros
1547     = Args.hasArg(OPT_code_completion_macros);
1548   Opts.CodeCompleteOpts.IncludeCodePatterns
1549     = Args.hasArg(OPT_code_completion_patterns);
1550   Opts.CodeCompleteOpts.IncludeGlobals
1551     = !Args.hasArg(OPT_no_code_completion_globals);
1552   Opts.CodeCompleteOpts.IncludeBriefComments
1553     = Args.hasArg(OPT_code_completion_brief_comments);
1554 
1555   Opts.OverrideRecordLayoutsFile
1556     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1557   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1558                                      OPT_arcmt_modify,
1559                                      OPT_arcmt_migrate)) {
1560     switch (A->getOption().getID()) {
1561     default:
1562       llvm_unreachable("missed a case");
1563     case OPT_arcmt_check:
1564       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1565       break;
1566     case OPT_arcmt_modify:
1567       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1568       break;
1569     case OPT_arcmt_migrate:
1570       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1571       break;
1572     }
1573   }
1574   Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1575   Opts.ARCMTMigrateReportOut
1576     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1577   Opts.ARCMTMigrateEmitARCErrors
1578     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1579 
1580   if (Args.hasArg(OPT_objcmt_migrate_literals))
1581     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1582   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1583     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1584 
1585   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1586       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1587     Diags.Report(diag::err_drv_argument_not_allowed_with)
1588       << "ARC migration" << "ObjC migration";
1589   }
1590 
1591   InputKind DashX = IK_None;
1592   if (const Arg *A = Args.getLastArg(OPT_x)) {
1593     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1594       .Case("c", IK_C)
1595       .Case("cl", IK_OpenCL)
1596       .Case("cuda", IK_CUDA)
1597       .Case("c++", IK_CXX)
1598       .Case("objective-c", IK_ObjC)
1599       .Case("objective-c++", IK_ObjCXX)
1600       .Case("cpp-output", IK_PreprocessedC)
1601       .Case("assembler-with-cpp", IK_Asm)
1602       .Case("c++-cpp-output", IK_PreprocessedCXX)
1603       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1604       .Case("objc-cpp-output", IK_PreprocessedObjC)
1605       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1606       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1607       .Case("c-header", IK_C)
1608       .Case("cl-header", IK_OpenCL)
1609       .Case("objective-c-header", IK_ObjC)
1610       .Case("c++-header", IK_CXX)
1611       .Case("objective-c++-header", IK_ObjCXX)
1612       .Case("ast", IK_AST)
1613       .Case("ir", IK_LLVM_IR)
1614       .Default(IK_None);
1615     if (DashX == IK_None)
1616       Diags.Report(diag::err_drv_invalid_value)
1617         << A->getAsString(Args) << A->getValue(Args);
1618   }
1619 
1620   // '-' is the default input if none is given.
1621   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1622   Opts.Inputs.clear();
1623   if (Inputs.empty())
1624     Inputs.push_back("-");
1625   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1626     InputKind IK = DashX;
1627     if (IK == IK_None) {
1628       IK = FrontendOptions::getInputKindForExtension(
1629         StringRef(Inputs[i]).rsplit('.').second);
1630       // FIXME: Remove this hack.
1631       if (i == 0)
1632         DashX = IK;
1633     }
1634     Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1635   }
1636 
1637   return DashX;
1638 }
1639 
1640 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1641                                                  void *MainAddr) {
1642   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1643 
1644   if (!P.isEmpty()) {
1645     P.eraseComponent();  // Remove /clang from foo/bin/clang
1646     P.eraseComponent();  // Remove /bin   from foo/bin
1647 
1648     // Get foo/lib/clang/<version>/include
1649     P.appendComponent("lib");
1650     P.appendComponent("clang");
1651     P.appendComponent(CLANG_VERSION_STRING);
1652   }
1653 
1654   return P.str();
1655 }
1656 
1657 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1658   using namespace options;
1659   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1660   Opts.Verbose = Args.hasArg(OPT_v);
1661   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1662   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1663   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1664   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1665     Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1666   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1667   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1668   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1669 
1670   // Add -I..., -F..., and -index-header-map options in order.
1671   bool IsIndexHeaderMap = false;
1672   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1673                                              OPT_index_header_map),
1674        ie = Args.filtered_end(); it != ie; ++it) {
1675     if ((*it)->getOption().matches(OPT_index_header_map)) {
1676       // -index-header-map applies to the next -I or -F.
1677       IsIndexHeaderMap = true;
1678       continue;
1679     }
1680 
1681     frontend::IncludeDirGroup Group
1682       = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1683 
1684     Opts.AddPath((*it)->getValue(Args), Group, true,
1685                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1686     IsIndexHeaderMap = false;
1687   }
1688 
1689   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1690   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1691   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1692                                              OPT_iwithprefixbefore),
1693          ie = Args.filtered_end(); it != ie; ++it) {
1694     const Arg *A = *it;
1695     if (A->getOption().matches(OPT_iprefix))
1696       Prefix = A->getValue(Args);
1697     else if (A->getOption().matches(OPT_iwithprefix))
1698       Opts.AddPath(Prefix.str() + A->getValue(Args),
1699                    frontend::System, false, false, false);
1700     else
1701       Opts.AddPath(Prefix.str() + A->getValue(Args),
1702                    frontend::Angled, false, false, false);
1703   }
1704 
1705   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1706          ie = Args.filtered_end(); it != ie; ++it)
1707     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1708   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1709          ie = Args.filtered_end(); it != ie; ++it)
1710     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1711   for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1712          OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1713     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1714                  !(*it)->getOption().matches(OPT_iwithsysroot));
1715   for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1716          ie = Args.filtered_end(); it != ie; ++it)
1717     Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1718                  true);
1719 
1720   // Add the paths for the various language specific isystem flags.
1721   for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1722        ie = Args.filtered_end(); it != ie; ++it)
1723     Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1724   for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1725        ie = Args.filtered_end(); it != ie; ++it)
1726     Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1727   for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1728        ie = Args.filtered_end(); it != ie; ++it)
1729     Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1730   for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1731        ie = Args.filtered_end(); it != ie; ++it)
1732     Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1733                  true);
1734 
1735   // Add the internal paths from a driver that detects standard include paths.
1736   for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1737                                             OPT_internal_externc_isystem),
1738                     E = Args.filtered_end();
1739        I != E; ++I)
1740     Opts.AddPath((*I)->getValue(Args), frontend::System,
1741                  false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1742                  (*I)->getOption().matches(OPT_internal_externc_isystem));
1743 
1744   // Add the path prefixes which are implicitly treated as being system headers.
1745   for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1746                                             OPT_ino_system_prefix),
1747                     E = Args.filtered_end();
1748        I != E; ++I)
1749     Opts.AddSystemHeaderPrefix((*I)->getValue(Args),
1750                                (*I)->getOption().matches(OPT_isystem_prefix));
1751 }
1752 
1753 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1754                                          LangStandard::Kind LangStd) {
1755   // Set some properties which depend solely on the input kind; it would be nice
1756   // to move these to the language standard, and have the driver resolve the
1757   // input kind + language standard.
1758   if (IK == IK_Asm) {
1759     Opts.AsmPreprocessor = 1;
1760   } else if (IK == IK_ObjC ||
1761              IK == IK_ObjCXX ||
1762              IK == IK_PreprocessedObjC ||
1763              IK == IK_PreprocessedObjCXX) {
1764     Opts.ObjC1 = Opts.ObjC2 = 1;
1765   }
1766 
1767   if (LangStd == LangStandard::lang_unspecified) {
1768     // Based on the base language, pick one.
1769     switch (IK) {
1770     case IK_None:
1771     case IK_AST:
1772     case IK_LLVM_IR:
1773       llvm_unreachable("Invalid input kind!");
1774     case IK_OpenCL:
1775       LangStd = LangStandard::lang_opencl;
1776       break;
1777     case IK_CUDA:
1778       LangStd = LangStandard::lang_cuda;
1779       break;
1780     case IK_Asm:
1781     case IK_C:
1782     case IK_PreprocessedC:
1783     case IK_ObjC:
1784     case IK_PreprocessedObjC:
1785       LangStd = LangStandard::lang_gnu99;
1786       break;
1787     case IK_CXX:
1788     case IK_PreprocessedCXX:
1789     case IK_ObjCXX:
1790     case IK_PreprocessedObjCXX:
1791       LangStd = LangStandard::lang_gnucxx98;
1792       break;
1793     }
1794   }
1795 
1796   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1797   Opts.BCPLComment = Std.hasBCPLComments();
1798   Opts.C99 = Std.isC99();
1799   Opts.C11 = Std.isC11();
1800   Opts.CPlusPlus = Std.isCPlusPlus();
1801   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1802   Opts.Digraphs = Std.hasDigraphs();
1803   Opts.GNUMode = Std.isGNUMode();
1804   Opts.GNUInline = !Std.isC99();
1805   Opts.HexFloats = Std.hasHexFloats();
1806   Opts.ImplicitInt = Std.hasImplicitInt();
1807 
1808   // Set OpenCL Version.
1809   if (LangStd == LangStandard::lang_opencl) {
1810     Opts.OpenCL = 1;
1811     Opts.OpenCLVersion = 100;
1812   }
1813   else if (LangStd == LangStandard::lang_opencl11) {
1814       Opts.OpenCL = 1;
1815       Opts.OpenCLVersion = 110;
1816   }
1817   else if (LangStd == LangStandard::lang_opencl12) {
1818     Opts.OpenCL = 1;
1819     Opts.OpenCLVersion = 120;
1820   }
1821 
1822   // OpenCL has some additional defaults.
1823   if (Opts.OpenCL) {
1824     Opts.AltiVec = 0;
1825     Opts.CXXOperatorNames = 1;
1826     Opts.LaxVectorConversions = 0;
1827     Opts.DefaultFPContract = 1;
1828   }
1829 
1830   if (LangStd == LangStandard::lang_cuda)
1831     Opts.CUDA = 1;
1832 
1833   // OpenCL and C++ both have bool, true, false keywords.
1834   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1835 
1836   Opts.GNUKeywords = Opts.GNUMode;
1837   Opts.CXXOperatorNames = Opts.CPlusPlus;
1838 
1839   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1840   // is specified, or -std is set to a conforming mode.
1841   Opts.Trigraphs = !Opts.GNUMode;
1842 
1843   Opts.DollarIdents = !Opts.AsmPreprocessor;
1844 }
1845 
1846 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1847                           DiagnosticsEngine &Diags) {
1848   // FIXME: Cleanup per-file based stuff.
1849   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1850   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1851     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1852 #define LANGSTANDARD(id, name, desc, features) \
1853       .Case(name, LangStandard::lang_##id)
1854 #include "clang/Frontend/LangStandards.def"
1855       .Default(LangStandard::lang_unspecified);
1856     if (LangStd == LangStandard::lang_unspecified)
1857       Diags.Report(diag::err_drv_invalid_value)
1858         << A->getAsString(Args) << A->getValue(Args);
1859     else {
1860       // Valid standard, check to make sure language and standard are compatable.
1861       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1862       switch (IK) {
1863       case IK_C:
1864       case IK_ObjC:
1865       case IK_PreprocessedC:
1866       case IK_PreprocessedObjC:
1867         if (!(Std.isC89() || Std.isC99()))
1868           Diags.Report(diag::err_drv_argument_not_allowed_with)
1869             << A->getAsString(Args) << "C/ObjC";
1870         break;
1871       case IK_CXX:
1872       case IK_ObjCXX:
1873       case IK_PreprocessedCXX:
1874       case IK_PreprocessedObjCXX:
1875         if (!Std.isCPlusPlus())
1876           Diags.Report(diag::err_drv_argument_not_allowed_with)
1877             << A->getAsString(Args) << "C++/ObjC++";
1878         break;
1879       case IK_OpenCL:
1880         if (!Std.isC99())
1881           Diags.Report(diag::err_drv_argument_not_allowed_with)
1882             << A->getAsString(Args) << "OpenCL";
1883         break;
1884       case IK_CUDA:
1885         if (!Std.isCPlusPlus())
1886           Diags.Report(diag::err_drv_argument_not_allowed_with)
1887             << A->getAsString(Args) << "CUDA";
1888         break;
1889       default:
1890         break;
1891       }
1892     }
1893   }
1894 
1895   // -cl-std only applies for OpenCL language standards.
1896   // Override the -std option in this case.
1897   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1898     LangStandard::Kind OpenCLLangStd
1899     = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1900     .Case("CL", LangStandard::lang_opencl)
1901     .Case("CL1.1", LangStandard::lang_opencl11)
1902     .Case("CL1.2", LangStandard::lang_opencl12)
1903     .Default(LangStandard::lang_unspecified);
1904 
1905     if (OpenCLLangStd == LangStandard::lang_unspecified) {
1906       Diags.Report(diag::err_drv_invalid_value)
1907       << A->getAsString(Args) << A->getValue(Args);
1908     }
1909     else
1910       LangStd = OpenCLLangStd;
1911   }
1912 
1913   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1914 
1915   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1916   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1917   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1918   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1919   // name, as it doesn't seem a useful distinction.
1920   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1921                                   Opts.GNUKeywords);
1922 
1923   if (Args.hasArg(OPT_fno_operator_names))
1924     Opts.CXXOperatorNames = 0;
1925 
1926   if (Opts.ObjC1) {
1927     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1928       StringRef value = arg->getValue(Args);
1929       if (Opts.ObjCRuntime.tryParse(value))
1930         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1931     }
1932 
1933     if (Args.hasArg(OPT_fobjc_gc_only))
1934       Opts.setGC(LangOptions::GCOnly);
1935     else if (Args.hasArg(OPT_fobjc_gc))
1936       Opts.setGC(LangOptions::HybridGC);
1937     else if (Args.hasArg(OPT_fobjc_arc)) {
1938       Opts.ObjCAutoRefCount = 1;
1939       if (!Opts.ObjCRuntime.isNonFragile())
1940         Diags.Report(diag::err_arc_nonfragile_abi);
1941     }
1942 
1943     Opts.ObjCRuntimeHasWeak = Opts.ObjCRuntime.hasWeak();
1944     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1945       Opts.ObjCRuntimeHasWeak = 1;
1946 
1947     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1948       Opts.ObjCInferRelatedResultType = 0;
1949   }
1950 
1951   if (Args.hasArg(OPT_fgnu89_inline))
1952     Opts.GNUInline = 1;
1953 
1954   if (Args.hasArg(OPT_fapple_kext)) {
1955     if (!Opts.CPlusPlus)
1956       Diags.Report(diag::warn_c_kext);
1957     else
1958       Opts.AppleKext = 1;
1959   }
1960 
1961   if (Args.hasArg(OPT_print_ivar_layout))
1962     Opts.ObjCGCBitmapPrint = 1;
1963   if (Args.hasArg(OPT_fno_constant_cfstrings))
1964     Opts.NoConstantCFStrings = 1;
1965 
1966   if (Args.hasArg(OPT_faltivec))
1967     Opts.AltiVec = 1;
1968 
1969   if (Args.hasArg(OPT_pthread))
1970     Opts.POSIXThreads = 1;
1971 
1972   if (Args.hasArg(OPT_fdelayed_template_parsing))
1973     Opts.DelayedTemplateParsing = 1;
1974 
1975   StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1976   if (Vis == "default")
1977     Opts.setVisibilityMode(DefaultVisibility);
1978   else if (Vis == "hidden")
1979     Opts.setVisibilityMode(HiddenVisibility);
1980   else if (Vis == "protected")
1981     // FIXME: diagnose if target does not support protected visibility
1982     Opts.setVisibilityMode(ProtectedVisibility);
1983   else
1984     Diags.Report(diag::err_drv_invalid_value)
1985       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1986 
1987   if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
1988     StringRef Val = A->getValue(Args);
1989     if (Val == "fast")
1990       Opts.setFPContractMode(LangOptions::FPC_Fast);
1991     else if (Val == "on")
1992       Opts.setFPContractMode(LangOptions::FPC_On);
1993     else if (Val == "off")
1994       Opts.setFPContractMode(LangOptions::FPC_Off);
1995     else
1996       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
1997   }
1998 
1999   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2000     Opts.InlineVisibilityHidden = 1;
2001 
2002   if (Args.hasArg(OPT_ftrapv)) {
2003     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2004     // Set the handler, if one is specified.
2005     Opts.OverflowHandler =
2006         Args.getLastArgValue(OPT_ftrapv_handler);
2007   }
2008   else if (Args.hasArg(OPT_fwrapv))
2009     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2010 
2011   if (Args.hasArg(OPT_trigraphs))
2012     Opts.Trigraphs = 1;
2013 
2014   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2015                                    OPT_fno_dollars_in_identifiers,
2016                                    Opts.DollarIdents);
2017   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2018   Opts.MicrosoftExt
2019     = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
2020   Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
2021   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
2022   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2023   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2024   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2025                                    Opts.ConstStrings);
2026   if (Args.hasArg(OPT_fno_lax_vector_conversions))
2027     Opts.LaxVectorConversions = 0;
2028   if (Args.hasArg(OPT_fno_threadsafe_statics))
2029     Opts.ThreadsafeStatics = 0;
2030   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2031   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2032   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2033   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2034   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2035 
2036   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
2037   Opts.Blocks = Args.hasArg(OPT_fblocks);
2038   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2039   Opts.Modules = Args.hasArg(OPT_fmodules);
2040   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
2041   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
2042   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2043   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2044   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2045   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
2046   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2047   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2048   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2049   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
2050   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
2051                                                     Diags);
2052   Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
2053                                                     Diags);
2054   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2055   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
2056                                                     0, Diags);
2057   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2058   Opts.ObjCConstantStringClass =
2059     Args.getLastArgValue(OPT_fconstant_string_class);
2060   Opts.ObjCDefaultSynthProperties =
2061     Args.hasArg(OPT_fobjc_default_synthesize_properties);
2062   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
2063   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2064   Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
2065   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
2066   Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
2067   Opts.Static = Args.hasArg(OPT_static_define);
2068   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2069   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2070                         || Args.hasArg(OPT_fdump_record_layouts);
2071   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2072   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2073   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2074   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2075   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2076   Opts.MRTD = Args.hasArg(OPT_mrtd);
2077   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2078   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2079   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2080   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2081   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2082   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2083   Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
2084   Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
2085   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2086   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
2087 
2088   // Record whether the __DEPRECATED define was requested.
2089   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2090                                  OPT_fno_deprecated_macro,
2091                                  Opts.Deprecated);
2092 
2093   // FIXME: Eliminate this dependency.
2094   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
2095   Opts.Optimize = Opt != 0;
2096   Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
2097 
2098   // This is the __NO_INLINE__ define, which just depends on things like the
2099   // optimization level and -fno-inline, not actually whether the backend has
2100   // inlining enabled.
2101   Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2102 
2103   Opts.FastMath = Args.hasArg(OPT_ffast_math);
2104   Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
2105 
2106   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
2107   switch (SSP) {
2108   default:
2109     Diags.Report(diag::err_drv_invalid_value)
2110       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2111     break;
2112   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2113   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2114   case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
2115   }
2116 }
2117 
2118 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2119                                   FileManager &FileMgr,
2120                                   DiagnosticsEngine &Diags) {
2121   using namespace options;
2122   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2123   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2124   if (const Arg *A = Args.getLastArg(OPT_token_cache))
2125       Opts.TokenCache = A->getValue(Args);
2126   else
2127     Opts.TokenCache = Opts.ImplicitPTHInclude;
2128   Opts.UsePredefines = !Args.hasArg(OPT_undef);
2129   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2130   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2131 
2132   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2133   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
2134          ie = Args.filtered_end(); it != ie; ++it) {
2135     const Arg *A = *it;
2136     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
2137   }
2138 
2139   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2140     StringRef Value(A->getValue(Args));
2141     size_t Comma = Value.find(',');
2142     unsigned Bytes = 0;
2143     unsigned EndOfLine = 0;
2144 
2145     if (Comma == StringRef::npos ||
2146         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2147         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2148       Diags.Report(diag::err_drv_preamble_format);
2149     else {
2150       Opts.PrecompiledPreambleBytes.first = Bytes;
2151       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2152     }
2153   }
2154 
2155   // Add macros from the command line.
2156   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
2157          ie = Args.filtered_end(); it != ie; ++it) {
2158     if ((*it)->getOption().matches(OPT_D))
2159       Opts.addMacroDef((*it)->getValue(Args));
2160     else
2161       Opts.addMacroUndef((*it)->getValue(Args));
2162   }
2163 
2164   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2165 
2166   // Add the ordered list of -includes.
2167   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
2168                                              OPT_include_pth),
2169          ie = Args.filtered_end(); it != ie; ++it) {
2170     const Arg *A = *it;
2171     // PCH is handled specially, we need to extra the original include path.
2172     if (A->getOption().matches(OPT_include_pch)) {
2173       std::string OriginalFile =
2174         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
2175       if (OriginalFile.empty())
2176         continue;
2177 
2178       Opts.Includes.push_back(OriginalFile);
2179     } else
2180       Opts.Includes.push_back(A->getValue(Args));
2181   }
2182 
2183   for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2184          ie = Args.filtered_end(); it != ie; ++it) {
2185     const Arg *A = *it;
2186     Opts.ChainedIncludes.push_back(A->getValue(Args));
2187   }
2188 
2189   // Include 'altivec.h' if -faltivec option present
2190   if (Args.hasArg(OPT_faltivec))
2191     Opts.Includes.push_back("altivec.h");
2192 
2193   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2194          ie = Args.filtered_end(); it != ie; ++it) {
2195     const Arg *A = *it;
2196     std::pair<StringRef,StringRef> Split =
2197       StringRef(A->getValue(Args)).split(';');
2198 
2199     if (Split.second.empty()) {
2200       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2201       continue;
2202     }
2203 
2204     Opts.addRemappedFile(Split.first, Split.second);
2205   }
2206 
2207   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2208     StringRef Name = A->getValue(Args);
2209     unsigned Library = llvm::StringSwitch<unsigned>(Name)
2210       .Case("libc++", ARCXX_libcxx)
2211       .Case("libstdc++", ARCXX_libstdcxx)
2212       .Case("none", ARCXX_nolib)
2213       .Default(~0U);
2214     if (Library == ~0U)
2215       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2216     else
2217       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2218   }
2219 }
2220 
2221 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2222                                         ArgList &Args) {
2223   using namespace options;
2224   Opts.ShowCPP = !Args.hasArg(OPT_dM);
2225   Opts.ShowComments = Args.hasArg(OPT_C);
2226   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2227   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2228   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2229   Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2230 }
2231 
2232 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2233   using namespace options;
2234   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2235   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2236   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2237   Opts.Features = Args.getAllArgValues(OPT_target_feature);
2238   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2239   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2240 
2241   // Use the default target triple if unspecified.
2242   if (Opts.Triple.empty())
2243     Opts.Triple = llvm::sys::getDefaultTargetTriple();
2244 }
2245 
2246 //
2247 
2248 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2249                                         const char *const *ArgBegin,
2250                                         const char *const *ArgEnd,
2251                                         DiagnosticsEngine &Diags) {
2252   bool Success = true;
2253 
2254   // Parse the arguments.
2255   OwningPtr<OptTable> Opts(createDriverOptTable());
2256   unsigned MissingArgIndex, MissingArgCount;
2257   OwningPtr<InputArgList> Args(
2258     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2259 
2260   // Check for missing argument error.
2261   if (MissingArgCount) {
2262     Diags.Report(diag::err_drv_missing_argument)
2263       << Args->getArgString(MissingArgIndex) << MissingArgCount;
2264     Success = false;
2265   }
2266 
2267   // Issue errors on unknown arguments.
2268   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2269          ie = Args->filtered_end(); it != ie; ++it) {
2270     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2271     Success = false;
2272   }
2273 
2274   // Issue errors on arguments that are not valid for CC1.
2275   for (ArgList::iterator I = Args->begin(), E = Args->end();
2276        I != E; ++I) {
2277     if (!(*I)->getOption().isCC1Option()) {
2278       Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
2279       Success = false;
2280     }
2281   }
2282 
2283   Success = ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags) && Success;
2284   Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2285   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2286   Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
2287             && Success;
2288   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2289   // FIXME: We shouldn't have to pass the DashX option around here
2290   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2291   Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2292             && Success;
2293   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2294   if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2295     ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2296     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2297       Res.getLangOpts()->ObjCExceptions = 1;
2298   }
2299   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2300   // PCH file and find the original header name. Remove the need to do that in
2301   // ParsePreprocessorArgs and remove the FileManager
2302   // parameters from the function and the "FileManager.h" #include.
2303   FileManager FileMgr(Res.getFileSystemOpts());
2304   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2305   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2306   ParseTargetArgs(Res.getTargetOpts(), *Args);
2307 
2308   return Success;
2309 }
2310 
2311 namespace {
2312 
2313   class ModuleSignature {
2314     llvm::SmallVector<uint64_t, 16> Data;
2315     unsigned CurBit;
2316     uint64_t CurValue;
2317 
2318   public:
2319     ModuleSignature() : CurBit(0), CurValue(0) { }
2320 
2321     void add(uint64_t Value, unsigned Bits);
2322     void add(StringRef Value);
2323     void flush();
2324 
2325     llvm::APInt getAsInteger() const;
2326   };
2327 }
2328 
2329 void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2330   CurValue |= Value << CurBit;
2331   if (CurBit + NumBits < 64) {
2332     CurBit += NumBits;
2333     return;
2334   }
2335 
2336   // Add the current word.
2337   Data.push_back(CurValue);
2338 
2339   if (CurBit)
2340     CurValue = Value >> (64-CurBit);
2341   else
2342     CurValue = 0;
2343   CurBit = (CurBit+NumBits) & 63;
2344 }
2345 
2346 void ModuleSignature::flush() {
2347   if (CurBit == 0)
2348     return;
2349 
2350   Data.push_back(CurValue);
2351   CurBit = 0;
2352   CurValue = 0;
2353 }
2354 
2355 void ModuleSignature::add(StringRef Value) {
2356   for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2357     add(*I, 8);
2358 }
2359 
2360 llvm::APInt ModuleSignature::getAsInteger() const {
2361   return llvm::APInt(Data.size() * 64, Data);
2362 }
2363 
2364 std::string CompilerInvocation::getModuleHash() const {
2365   ModuleSignature Signature;
2366 
2367   // Start the signature with the compiler version.
2368   // FIXME: The full version string can be quite long.  Omit it from the
2369   // module hash for now to avoid failures where the path name becomes too
2370   // long.  An MD5 or similar checksum would work well here.
2371   // Signature.add(getClangFullRepositoryVersion());
2372 
2373   // Extend the signature with the language options
2374 #define LANGOPT(Name, Bits, Default, Description) \
2375   Signature.add(LangOpts->Name, Bits);
2376 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2377   Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2378 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2379 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2380 #include "clang/Basic/LangOptions.def"
2381 
2382   // Extend the signature with the target triple
2383   llvm::Triple T(TargetOpts.Triple);
2384   Signature.add((unsigned)T.getArch(), 5);
2385   Signature.add((unsigned)T.getVendor(), 4);
2386   Signature.add((unsigned)T.getOS(), 5);
2387   Signature.add((unsigned)T.getEnvironment(), 4);
2388 
2389   // Extend the signature with preprocessor options.
2390   Signature.add(getPreprocessorOpts().UsePredefines, 1);
2391   Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2392 
2393   // Hash the preprocessor defines.
2394   // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2395   std::vector<StringRef> MacroDefs;
2396   for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2397             I = getPreprocessorOpts().Macros.begin(),
2398          IEnd = getPreprocessorOpts().Macros.end();
2399        I != IEnd; ++I) {
2400     if (!I->second)
2401       MacroDefs.push_back(I->first);
2402   }
2403   llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2404 
2405   unsigned PPHashResult = 0;
2406   for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2407     PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2408   Signature.add(PPHashResult, 32);
2409 
2410   // We've generated the signature. Treat it as one large APInt that we'll
2411   // encode in base-36 and return.
2412   Signature.flush();
2413   return Signature.getAsInteger().toString(36, /*Signed=*/false);
2414 }
2415