xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 3292d06a1ba34eaa99226cc2133e03b47c471c3b)
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Driver/Arg.h"
15 #include "clang/Driver/ArgList.h"
16 #include "clang/Driver/Options.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/OptTable.h"
19 #include "clang/Driver/Option.h"
20 #include "clang/Frontend/CompilerInvocation.h"
21 #include "clang/Frontend/LangStandard.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/StringSwitch.h"
27 #include "llvm/ADT/Triple.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/Host.h"
30 #include "llvm/Support/Path.h"
31 using namespace clang;
32 
33 //===----------------------------------------------------------------------===//
34 // Initialization.
35 //===----------------------------------------------------------------------===//
36 
37 CompilerInvocationBase::CompilerInvocationBase()
38   : LangOpts(new LangOptions()) {}
39 
40 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
41   : RefCountedBase<CompilerInvocation>(),
42     LangOpts(new LangOptions(*X.getLangOpts())) {}
43 
44 //===----------------------------------------------------------------------===//
45 // Utility functions.
46 //===----------------------------------------------------------------------===//
47 
48 static const char *getAnalysisStoreName(AnalysisStores Kind) {
49   switch (Kind) {
50   default:
51     llvm_unreachable("Unknown analysis store!");
52 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
53   case NAME##Model: return CMDFLAG;
54 #include "clang/Frontend/Analyses.def"
55   }
56 }
57 
58 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
59   switch (Kind) {
60   default:
61     llvm_unreachable("Unknown analysis constraints!");
62 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
63   case NAME##Model: return CMDFLAG;
64 #include "clang/Frontend/Analyses.def"
65   }
66 }
67 
68 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
69   switch (Kind) {
70   default:
71     llvm_unreachable("Unknown analysis client!");
72 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
73   case PD_##NAME: return CMDFLAG;
74 #include "clang/Frontend/Analyses.def"
75   }
76 }
77 
78 static const char *getAnalysisPurgeModeName(AnalysisPurgeMode Kind) {
79   switch (Kind) {
80   default:
81     llvm_unreachable("Unknown analysis purge mode!");
82 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
83   case NAME: return CMDFLAG;
84 #include "clang/Frontend/Analyses.def"
85   }
86 }
87 
88 static const char *getAnalysisIPAModeName(AnalysisIPAMode Kind) {
89   switch (Kind) {
90   default:
91     llvm_unreachable("Unknown analysis ipa mode!");
92 #define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
93   case NAME: return CMDFLAG;
94 #include "clang/Frontend/Analyses.def"
95   }
96 }
97 
98 static const char *
99   getAnalysisInliningModeName(AnalysisInliningMode Kind) {
100   switch (Kind) {
101   default:
102     llvm_unreachable("Unknown analysis inlining mode!");
103 #define ANALYSIS_INLINE_SELECTION(NAME, CMDFLAG, DESC) \
104   case NAME: return CMDFLAG;
105 #include "clang/Frontend/Analyses.def"
106   }
107 }
108 
109 //===----------------------------------------------------------------------===//
110 // Serialization (to args)
111 //===----------------------------------------------------------------------===//
112 
113 namespace {
114   /// ToArgsList - Helper class to create a list of std::strings.
115   class ToArgsList {
116     std::vector<std::string> &Res;
117   public:
118     explicit ToArgsList(std::vector<std::string> &Res) : Res(Res) {}
119 
120     void push_back(StringRef Str) {
121       // Avoid creating a temporary string.
122       Res.push_back(std::string());
123       Res.back().assign(Str.data(), Str.size());
124     }
125 
126     void push_back(StringRef Str1, StringRef Str2) {
127       push_back(Str1);
128       push_back(Str2);
129     }
130   };
131 }
132 
133 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts, ToArgsList &Res) {
134   if (Opts.ShowCheckerHelp)
135     Res.push_back("-analyzer-checker-help");
136   if (Opts.AnalysisStoreOpt != RegionStoreModel)
137     Res.push_back("-analyzer-store",
138                   getAnalysisStoreName(Opts.AnalysisStoreOpt));
139   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel)
140     Res.push_back("-analyzer-constraints",
141                   getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
142   if (Opts.AnalysisDiagOpt != PD_HTML)
143     Res.push_back("-analyzer-output",
144                   getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
145   if (Opts.AnalysisPurgeOpt != PurgeStmt)
146     Res.push_back("-analyzer-purge",
147                   getAnalysisPurgeModeName(Opts.AnalysisPurgeOpt));
148   if (!Opts.AnalyzeSpecificFunction.empty())
149     Res.push_back("-analyze-function", Opts.AnalyzeSpecificFunction);
150   if (Opts.IPAMode != Inlining)
151     Res.push_back("-analyzer-ipa", getAnalysisIPAModeName(Opts.IPAMode));
152   if (Opts.InliningMode != NoRedundancy)
153     Res.push_back("-analyzer-inlining-mode",
154                   getAnalysisInliningModeName(Opts.InliningMode));
155 
156   if (Opts.AnalyzeAll)
157     Res.push_back("-analyzer-opt-analyze-headers");
158   if (Opts.AnalyzerDisplayProgress)
159     Res.push_back("-analyzer-display-progress");
160   if (Opts.AnalyzeNestedBlocks)
161     Res.push_back("-analyzer-opt-analyze-nested-blocks");
162   if (Opts.EagerlyAssume)
163     Res.push_back("-analyzer-eagerly-assume");
164   if (Opts.TrimGraph)
165     Res.push_back("-trim-egraph");
166   if (Opts.VisualizeEGDot)
167     Res.push_back("-analyzer-viz-egraph-graphviz");
168   if (Opts.VisualizeEGUbi)
169     Res.push_back("-analyzer-viz-egraph-ubigraph");
170   if (Opts.NoRetryExhausted)
171     Res.push_back("-analyzer-disable-retry-exhausted");
172 
173   for (unsigned i = 0, e = Opts.CheckersControlList.size(); i != e; ++i) {
174     const std::pair<std::string, bool> &opt = Opts.CheckersControlList[i];
175     if (opt.second)
176       Res.push_back("-analyzer-disable-checker");
177     else
178       Res.push_back("-analyzer-checker");
179     Res.push_back(opt.first);
180   }
181 }
182 
183 static void CodeGenOptsToArgs(const CodeGenOptions &Opts, ToArgsList &Res) {
184   switch (Opts.DebugInfo) {
185     case CodeGenOptions::NoDebugInfo:
186       break;
187     case CodeGenOptions::DebugLineTablesOnly:
188       Res.push_back("-gline-tables-only");
189       break;
190     case CodeGenOptions::LimitedDebugInfo:
191       Res.push_back("-g");
192       Res.push_back("-flimit-debug-info");
193       break;
194     case CodeGenOptions::FullDebugInfo:
195       Res.push_back("-g");
196       Res.push_back("-fno-limit-debug-info");
197       break;
198   }
199   if (Opts.DisableLLVMOpts)
200     Res.push_back("-disable-llvm-optzns");
201   if (Opts.DisableRedZone)
202     Res.push_back("-disable-red-zone");
203   if (Opts.DisableTailCalls)
204     Res.push_back("-mdisable-tail-calls");
205   if (!Opts.DebugCompilationDir.empty())
206     Res.push_back("-fdebug-compilation-dir", Opts.DebugCompilationDir);
207   if (!Opts.DwarfDebugFlags.empty())
208     Res.push_back("-dwarf-debug-flags", Opts.DwarfDebugFlags);
209   if (Opts.EmitGcovArcs)
210     Res.push_back("-femit-coverage-data");
211   if (Opts.EmitGcovNotes)
212     Res.push_back("-femit-coverage-notes");
213   if (!Opts.MergeAllConstants)
214     Res.push_back("-fno-merge-all-constants");
215   if (Opts.NoCommon)
216     Res.push_back("-fno-common");
217   if (Opts.ForbidGuardVariables)
218     Res.push_back("-fforbid-guard-variables");
219   if (Opts.UseRegisterSizedBitfieldAccess)
220     Res.push_back("-fuse-register-sized-bitfield-access");
221   if (Opts.NoImplicitFloat)
222     Res.push_back("-no-implicit-float");
223   if (Opts.OmitLeafFramePointer)
224     Res.push_back("-momit-leaf-frame-pointer");
225   if (Opts.OptimizeSize) {
226     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
227     Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
228   } else if (Opts.OptimizationLevel != 0)
229     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
230   if (!Opts.MainFileName.empty())
231     Res.push_back("-main-file-name", Opts.MainFileName);
232   if (Opts.NoInfsFPMath)
233     Res.push_back("-menable-no-infinities");
234   if (Opts.NoNaNsFPMath)
235     Res.push_back("-menable-no-nans");
236   // SimplifyLibCalls is only derived.
237   // TimePasses is only derived.
238   // UnitAtATime is unused.
239   // Inlining is only derived.
240 
241   // UnrollLoops is derived, but also accepts an option, no
242   // harm in pushing it back here.
243   if (Opts.UnrollLoops)
244     Res.push_back("-funroll-loops");
245   if (Opts.DataSections)
246     Res.push_back("-fdata-sections");
247   if (Opts.FunctionSections)
248     Res.push_back("-ffunction-sections");
249   if (Opts.AsmVerbose)
250     Res.push_back("-masm-verbose");
251   if (!Opts.CodeModel.empty())
252     Res.push_back("-mcode-model", Opts.CodeModel);
253   if (Opts.CUDAIsDevice)
254     Res.push_back("-fcuda-is-device");
255   if (!Opts.CXAAtExit)
256     Res.push_back("-fno-use-cxa-atexit");
257   if (Opts.CXXCtorDtorAliases)
258     Res.push_back("-mconstructor-aliases");
259   if (Opts.ObjCAutoRefCountExceptions)
260     Res.push_back("-fobjc-arc-eh");
261   if (!Opts.DebugPass.empty()) {
262     Res.push_back("-mdebug-pass", Opts.DebugPass);
263   }
264   if (Opts.DisableFPElim)
265     Res.push_back("-mdisable-fp-elim");
266   if (!Opts.FloatABI.empty())
267     Res.push_back("-mfloat-abi", Opts.FloatABI);
268   if (!Opts.LimitFloatPrecision.empty())
269     Res.push_back("-mlimit-float-precision", Opts.LimitFloatPrecision);
270   if (Opts.NoZeroInitializedInBSS)
271     Res.push_back("-mno-zero-initialized-bss");
272   switch (Opts.getObjCDispatchMethod()) {
273   case CodeGenOptions::Legacy:
274     break;
275   case CodeGenOptions::Mixed:
276     Res.push_back("-fobjc-dispatch-method=mixed");
277     break;
278   case CodeGenOptions::NonLegacy:
279     Res.push_back("-fobjc-dispatch-method=non-legacy");
280     break;
281   }
282   if (Opts.BoundsChecking > 0)
283     Res.push_back("-fbounds-checking=" + llvm::utostr(Opts.BoundsChecking));
284   if (Opts.NumRegisterParameters)
285     Res.push_back("-mregparm", llvm::utostr(Opts.NumRegisterParameters));
286   if (Opts.NoGlobalMerge)
287     Res.push_back("-mno-global-merge");
288   if (Opts.NoExecStack)
289     Res.push_back("-mnoexecstack");
290   if (Opts.RelaxAll)
291     Res.push_back("-mrelax-all");
292   if (Opts.SaveTempLabels)
293     Res.push_back("-msave-temp-labels");
294   if (Opts.NoDwarf2CFIAsm)
295     Res.push_back("-fno-dwarf2-cfi-asm");
296   if (Opts.NoDwarfDirectoryAsm)
297     Res.push_back("-fno-dwarf-directory-asm");
298   if (Opts.SoftFloat)
299     Res.push_back("-msoft-float");
300   if (Opts.StrictEnums)
301     Res.push_back("-fstrict-enums");
302   if (Opts.UnwindTables)
303     Res.push_back("-munwind-tables");
304   if (Opts.RelocationModel != "pic")
305     Res.push_back("-mrelocation-model", Opts.RelocationModel);
306   if (!Opts.VerifyModule)
307     Res.push_back("-disable-llvm-verifier");
308   for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i)
309     Res.push_back("-backend-option", Opts.BackendOptions[i]);
310 
311   switch (Opts.DefaultTLSModel) {
312   case CodeGenOptions::GeneralDynamicTLSModel:
313     break;
314   case CodeGenOptions::LocalDynamicTLSModel:
315     Res.push_back("-ftls-model=local-dynamic");
316     break;
317   case CodeGenOptions::InitialExecTLSModel:
318     Res.push_back("-ftls-model=initial-exec");
319     break;
320   case CodeGenOptions::LocalExecTLSModel:
321     Res.push_back("-ftls-model=local-exec");
322     break;
323   }
324 }
325 
326 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
327                                        ToArgsList &Res) {
328   if (Opts.IncludeSystemHeaders)
329     Res.push_back("-sys-header-deps");
330   if (Opts.ShowHeaderIncludes)
331     Res.push_back("-H");
332   if (!Opts.HeaderIncludeOutputFile.empty())
333     Res.push_back("-header-include-file", Opts.HeaderIncludeOutputFile);
334   if (Opts.UsePhonyTargets)
335     Res.push_back("-MP");
336   if (!Opts.OutputFile.empty())
337     Res.push_back("-dependency-file", Opts.OutputFile);
338   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i)
339     Res.push_back("-MT", Opts.Targets[i]);
340 }
341 
342 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
343                                  ToArgsList &Res) {
344   if (Opts.IgnoreWarnings)
345     Res.push_back("-w");
346   if (Opts.NoRewriteMacros)
347     Res.push_back("-Wno-rewrite-macros");
348   if (Opts.Pedantic)
349     Res.push_back("-pedantic");
350   if (Opts.PedanticErrors)
351     Res.push_back("-pedantic-errors");
352   if (!Opts.ShowColumn)
353     Res.push_back("-fno-show-column");
354   if (!Opts.ShowLocation)
355     Res.push_back("-fno-show-source-location");
356   if (!Opts.ShowCarets)
357     Res.push_back("-fno-caret-diagnostics");
358   if (!Opts.ShowFixits)
359     Res.push_back("-fno-diagnostics-fixit-info");
360   if (Opts.ShowSourceRanges)
361     Res.push_back("-fdiagnostics-print-source-range-info");
362   if (Opts.ShowParseableFixits)
363     Res.push_back("-fdiagnostics-parseable-fixits");
364   if (Opts.ShowColors)
365     Res.push_back("-fcolor-diagnostics");
366   if (Opts.VerifyDiagnostics)
367     Res.push_back("-verify");
368   if (Opts.ShowOptionNames)
369     Res.push_back("-fdiagnostics-show-option");
370   if (Opts.ShowCategories == 1)
371     Res.push_back("-fdiagnostics-show-category=id");
372   else if (Opts.ShowCategories == 2)
373     Res.push_back("-fdiagnostics-show-category=name");
374   switch (Opts.Format) {
375   case DiagnosticOptions::Clang:
376     Res.push_back("-fdiagnostics-format=clang"); break;
377   case DiagnosticOptions::Msvc:
378     Res.push_back("-fdiagnostics-format=msvc");  break;
379   case DiagnosticOptions::Vi:
380     Res.push_back("-fdiagnostics-format=vi");    break;
381   }
382   if (Opts.ErrorLimit)
383     Res.push_back("-ferror-limit", llvm::utostr(Opts.ErrorLimit));
384   if (!Opts.DiagnosticLogFile.empty())
385     Res.push_back("-diagnostic-log-file", Opts.DiagnosticLogFile);
386   if (Opts.MacroBacktraceLimit
387                         != DiagnosticOptions::DefaultMacroBacktraceLimit)
388     Res.push_back("-fmacro-backtrace-limit",
389                   llvm::utostr(Opts.MacroBacktraceLimit));
390   if (Opts.TemplateBacktraceLimit
391                         != DiagnosticOptions::DefaultTemplateBacktraceLimit)
392     Res.push_back("-ftemplate-backtrace-limit",
393                   llvm::utostr(Opts.TemplateBacktraceLimit));
394   if (Opts.ConstexprBacktraceLimit
395                         != DiagnosticOptions::DefaultConstexprBacktraceLimit)
396     Res.push_back("-fconstexpr-backtrace-limit",
397                   llvm::utostr(Opts.ConstexprBacktraceLimit));
398 
399   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop)
400     Res.push_back("-ftabstop", llvm::utostr(Opts.TabStop));
401   if (Opts.MessageLength)
402     Res.push_back("-fmessage-length", llvm::utostr(Opts.MessageLength));
403   if (!Opts.DumpBuildInformation.empty())
404     Res.push_back("-dump-build-information", Opts.DumpBuildInformation);
405   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
406     Res.push_back("-W" + Opts.Warnings[i]);
407 }
408 
409 static const char *getInputKindName(InputKind Kind) {
410   switch (Kind) {
411   case IK_None:              break;
412   case IK_AST:               return "ast";
413   case IK_Asm:               return "assembler-with-cpp";
414   case IK_C:                 return "c";
415   case IK_CXX:               return "c++";
416   case IK_LLVM_IR:           return "ir";
417   case IK_ObjC:              return "objective-c";
418   case IK_ObjCXX:            return "objective-c++";
419   case IK_OpenCL:            return "cl";
420   case IK_CUDA:              return "cuda";
421   case IK_PreprocessedC:     return "cpp-output";
422   case IK_PreprocessedCXX:   return "c++-cpp-output";
423   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
424   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
425   }
426 
427   llvm_unreachable("Unexpected language kind!");
428 }
429 
430 static const char *getActionName(frontend::ActionKind Kind) {
431   switch (Kind) {
432   case frontend::PluginAction:
433     llvm_unreachable("Invalid kind!");
434 
435   case frontend::ASTDump:                return "-ast-dump";
436   case frontend::ASTDumpXML:             return "-ast-dump-xml";
437   case frontend::ASTPrint:               return "-ast-print";
438   case frontend::ASTView:                return "-ast-view";
439   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
440   case frontend::DumpTokens:             return "-dump-tokens";
441   case frontend::EmitAssembly:           return "-S";
442   case frontend::EmitBC:                 return "-emit-llvm-bc";
443   case frontend::EmitHTML:               return "-emit-html";
444   case frontend::EmitLLVM:               return "-emit-llvm";
445   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
446   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
447   case frontend::EmitObj:                return "-emit-obj";
448   case frontend::FixIt:                  return "-fixit";
449   case frontend::GenerateModule:         return "-emit-module";
450   case frontend::GeneratePCH:            return "-emit-pch";
451   case frontend::GeneratePTH:            return "-emit-pth";
452   case frontend::InitOnly:               return "-init-only";
453   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
454   case frontend::PrintDeclContext:       return "-print-decl-contexts";
455   case frontend::PrintPreamble:          return "-print-preamble";
456   case frontend::PrintPreprocessedInput: return "-E";
457   case frontend::RewriteMacros:          return "-rewrite-macros";
458   case frontend::RewriteObjC:            return "-rewrite-objc";
459   case frontend::RewriteTest:            return "-rewrite-test";
460   case frontend::RunAnalysis:            return "-analyze";
461   case frontend::MigrateSource:          return "-migrate";
462   case frontend::RunPreprocessorOnly:    return "-Eonly";
463   }
464 
465   llvm_unreachable("Unexpected language kind!");
466 }
467 
468 static void FileSystemOptsToArgs(const FileSystemOptions &Opts, ToArgsList &Res){
469   if (!Opts.WorkingDir.empty())
470     Res.push_back("-working-directory", Opts.WorkingDir);
471 }
472 
473 static void CodeCompleteOptionsToArgs(const CodeCompleteOptions &Opts,
474                                       ToArgsList &Res) {
475   if (Opts.IncludeMacros)
476     Res.push_back("-code-completion-macros");
477   if (Opts.IncludeCodePatterns)
478     Res.push_back("-code-completion-patterns");
479   if (!Opts.IncludeGlobals)
480     Res.push_back("-no-code-completion-globals");
481   if (Opts.IncludeBriefComments)
482     Res.push_back("-code-completion-brief-comments");
483 }
484 
485 static void FrontendOptsToArgs(const FrontendOptions &Opts, ToArgsList &Res) {
486   if (Opts.DisableFree)
487     Res.push_back("-disable-free");
488   if (Opts.RelocatablePCH)
489     Res.push_back("-relocatable-pch");
490   if (Opts.ShowHelp)
491     Res.push_back("-help");
492   if (Opts.ShowStats)
493     Res.push_back("-print-stats");
494   if (Opts.ShowTimers)
495     Res.push_back("-ftime-report");
496   if (Opts.ShowVersion)
497     Res.push_back("-version");
498   if (Opts.FixWhatYouCan)
499     Res.push_back("-fix-what-you-can");
500   if (Opts.FixOnlyWarnings)
501     Res.push_back("-fix-only-warnings");
502   if (Opts.FixAndRecompile)
503     Res.push_back("-fixit-recompile");
504   if (Opts.FixToTemporaries)
505     Res.push_back("-fixit-to-temporary");
506   switch (Opts.ARCMTAction) {
507   case FrontendOptions::ARCMT_None:
508     break;
509   case FrontendOptions::ARCMT_Check:
510     Res.push_back("-arcmt-check");
511     break;
512   case FrontendOptions::ARCMT_Modify:
513     Res.push_back("-arcmt-modify");
514     break;
515   case FrontendOptions::ARCMT_Migrate:
516     Res.push_back("-arcmt-migrate");
517     break;
518   }
519   CodeCompleteOptionsToArgs(Opts.CodeCompleteOpts, Res);
520   if (!Opts.MTMigrateDir.empty())
521     Res.push_back("-mt-migrate-directory", Opts.MTMigrateDir);
522   if (!Opts.ARCMTMigrateReportOut.empty())
523     Res.push_back("-arcmt-migrate-report-output", Opts.ARCMTMigrateReportOut);
524   if (Opts.ARCMTMigrateEmitARCErrors)
525     Res.push_back("-arcmt-migrate-emit-errors");
526 
527   if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals)
528     Res.push_back("-objcmt-migrate-literals");
529   if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting)
530     Res.push_back("-objcmt-migrate-subscripting");
531 
532   bool NeedLang = false;
533   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
534     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
535         Opts.Inputs[i].Kind)
536       NeedLang = true;
537   if (NeedLang)
538     Res.push_back("-x", getInputKindName(Opts.Inputs[0].Kind));
539   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
540     assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
541            "Unable to represent this input vector!");
542     Res.push_back(Opts.Inputs[i].File);
543   }
544 
545   if (!Opts.OutputFile.empty())
546     Res.push_back("-o", Opts.OutputFile);
547   if (!Opts.CodeCompletionAt.FileName.empty())
548     Res.push_back("-code-completion-at",
549                   Opts.CodeCompletionAt.FileName + ":" +
550                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
551                   llvm::utostr(Opts.CodeCompletionAt.Column));
552   if (Opts.ProgramAction != frontend::PluginAction)
553     Res.push_back(getActionName(Opts.ProgramAction));
554   if (!Opts.ActionName.empty()) {
555     Res.push_back("-plugin", Opts.ActionName);
556     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i)
557       Res.push_back("-plugin-arg-" + Opts.ActionName, Opts.PluginArgs[i]);
558   }
559   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i)
560     Res.push_back("-load", Opts.Plugins[i]);
561   for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
562     Res.push_back("-add-plugin", Opts.AddPluginActions[i]);
563     for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai)
564       Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i],
565                     Opts.AddPluginArgs[i][ai]);
566   }
567   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i)
568     Res.push_back("-ast-merge", Opts.ASTMergeFiles[i]);
569   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i)
570     Res.push_back("-mllvm", Opts.LLVMArgs[i]);
571   if (!Opts.OverrideRecordLayoutsFile.empty())
572     Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
573 }
574 
575 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
576                                    ToArgsList &Res) {
577   if (Opts.Sysroot != "/") {
578     Res.push_back("-isysroot");
579     Res.push_back(Opts.Sysroot);
580   }
581 
582   /// User specified include entries.
583   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
584     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
585     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
586       llvm::report_fatal_error("Invalid option set!");
587     if (E.IsUserSupplied) {
588       switch (E.Group) {
589       case frontend::After:
590         Res.push_back("-idirafter");
591         break;
592 
593       case frontend::Quoted:
594         Res.push_back("-iquote");
595         break;
596 
597       case frontend::System:
598         Res.push_back("-isystem");
599         break;
600 
601       case frontend::IndexHeaderMap:
602         Res.push_back("-index-header-map");
603         Res.push_back(E.IsFramework? "-F" : "-I");
604         break;
605 
606       case frontend::CSystem:
607         Res.push_back("-c-isystem");
608         break;
609 
610       case frontend::CXXSystem:
611         Res.push_back("-cxx-isystem");
612         break;
613 
614       case frontend::ObjCSystem:
615         Res.push_back("-objc-isystem");
616         break;
617 
618       case frontend::ObjCXXSystem:
619         Res.push_back("-objcxx-isystem");
620         break;
621 
622       case frontend::Angled:
623         Res.push_back(E.IsFramework ? "-F" : "-I");
624         break;
625       }
626     } else {
627       if (E.IsInternal) {
628         assert(E.Group == frontend::System && "Unexpected header search group");
629         if (E.ImplicitExternC)
630           Res.push_back("-internal-externc-isystem");
631         else
632           Res.push_back("-internal-isystem");
633       } else {
634         if (E.Group != frontend::Angled && E.Group != frontend::System)
635           llvm::report_fatal_error("Invalid option set!");
636         Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
637                       "-iwithprefix");
638       }
639     }
640     Res.push_back(E.Path);
641   }
642 
643   /// User-specified system header prefixes.
644   for (unsigned i = 0, e = Opts.SystemHeaderPrefixes.size(); i != e; ++i) {
645     if (Opts.SystemHeaderPrefixes[i].IsSystemHeader)
646       Res.push_back("-isystem-prefix");
647     else
648       Res.push_back("-ino-system-prefix");
649 
650     Res.push_back(Opts.SystemHeaderPrefixes[i].Prefix);
651   }
652 
653   if (!Opts.ResourceDir.empty())
654     Res.push_back("-resource-dir", Opts.ResourceDir);
655   if (!Opts.ModuleCachePath.empty())
656     Res.push_back("-fmodule-cache-path", Opts.ModuleCachePath);
657   if (!Opts.UseStandardSystemIncludes)
658     Res.push_back("-nostdsysteminc");
659   if (!Opts.UseStandardCXXIncludes)
660     Res.push_back("-nostdinc++");
661   if (Opts.UseLibcxx)
662     Res.push_back("-stdlib=libc++");
663   if (Opts.Verbose)
664     Res.push_back("-v");
665 }
666 
667 static void LangOptsToArgs(const LangOptions &Opts, ToArgsList &Res) {
668   LangOptions DefaultLangOpts;
669 
670   // FIXME: Need to set -std to get all the implicit options.
671 
672   // FIXME: We want to only pass options relative to the defaults, which
673   // requires constructing a target. :(
674   //
675   // It would be better to push the all target specific choices into the driver,
676   // so that everything below that was more uniform.
677 
678   if (Opts.Trigraphs)
679     Res.push_back("-trigraphs");
680   // Implicit based on the input kind:
681   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
682   // Implicit based on the input language standard:
683   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
684   if (Opts.DollarIdents)
685     Res.push_back("-fdollars-in-identifiers");
686   if (Opts.GNUMode && !Opts.GNUKeywords)
687     Res.push_back("-fno-gnu-keywords");
688   if (!Opts.GNUMode && Opts.GNUKeywords)
689     Res.push_back("-fgnu-keywords");
690   if (Opts.MicrosoftExt)
691     Res.push_back("-fms-extensions");
692   if (Opts.MicrosoftMode)
693     Res.push_back("-fms-compatibility");
694   if (Opts.MSCVersion != 0)
695     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
696   if (Opts.Borland)
697     Res.push_back("-fborland-extensions");
698   if (Opts.ObjCDefaultSynthProperties)
699     Res.push_back("-fobjc-default-synthesize-properties");
700   // NoInline is implicit.
701   if (!Opts.CXXOperatorNames)
702     Res.push_back("-fno-operator-names");
703   if (Opts.PascalStrings)
704     Res.push_back("-fpascal-strings");
705   if (Opts.CatchUndefined)
706     Res.push_back("-fcatch-undefined-behavior");
707   if (Opts.AddressSanitizer)
708     Res.push_back("-faddress-sanitizer");
709   if (Opts.ThreadSanitizer)
710     Res.push_back("-fthread-sanitizer");
711   if (Opts.WritableStrings)
712     Res.push_back("-fwritable-strings");
713   if (Opts.ConstStrings)
714     Res.push_back("-fconst-strings");
715   if (!Opts.LaxVectorConversions)
716     Res.push_back("-fno-lax-vector-conversions");
717   if (Opts.AltiVec)
718     Res.push_back("-faltivec");
719   if (Opts.Exceptions)
720     Res.push_back("-fexceptions");
721   if (Opts.ObjCExceptions)
722     Res.push_back("-fobjc-exceptions");
723   if (Opts.CXXExceptions)
724     Res.push_back("-fcxx-exceptions");
725   if (Opts.SjLjExceptions)
726     Res.push_back("-fsjlj-exceptions");
727   if (Opts.TraditionalCPP)
728     Res.push_back("-traditional-cpp");
729   if (!Opts.RTTI)
730     Res.push_back("-fno-rtti");
731   if (Opts.MSBitfields)
732     Res.push_back("-mms-bitfields");
733   if (Opts.Freestanding)
734     Res.push_back("-ffreestanding");
735   if (Opts.NoBuiltin)
736     Res.push_back("-fno-builtin");
737   if (!Opts.AssumeSaneOperatorNew)
738     Res.push_back("-fno-assume-sane-operator-new");
739   if (!Opts.ThreadsafeStatics)
740     Res.push_back("-fno-threadsafe-statics");
741   if (Opts.POSIXThreads)
742     Res.push_back("-pthread");
743   if (Opts.Blocks)
744     Res.push_back("-fblocks");
745   if (Opts.BlocksRuntimeOptional)
746     Res.push_back("-fblocks-runtime-optional");
747   if (Opts.Modules)
748     Res.push_back("-fmodules");
749   if (Opts.EmitAllDecls)
750     Res.push_back("-femit-all-decls");
751   if (Opts.MathErrno)
752     Res.push_back("-fmath-errno");
753   switch (Opts.getSignedOverflowBehavior()) {
754   case LangOptions::SOB_Undefined: break;
755   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
756   case LangOptions::SOB_Trapping:
757     Res.push_back("-ftrapv");
758     if (!Opts.OverflowHandler.empty())
759       Res.push_back("-ftrapv-handler", Opts.OverflowHandler);
760     break;
761   }
762   if (Opts.HeinousExtensions)
763     Res.push_back("-fheinous-gnu-extensions");
764   // Optimize is implicit.
765   // OptimizeSize is implicit.
766   if (Opts.FastMath)
767     Res.push_back("-ffast-math");
768   if (Opts.Static)
769     Res.push_back("-static-define");
770   if (Opts.DumpRecordLayoutsSimple)
771     Res.push_back("-fdump-record-layouts-simple");
772   else if (Opts.DumpRecordLayouts)
773     Res.push_back("-fdump-record-layouts");
774   if (Opts.DumpVTableLayouts)
775     Res.push_back("-fdump-vtable-layouts");
776   if (Opts.NoBitFieldTypeAlign)
777     Res.push_back("-fno-bitfield-type-alignment");
778   if (Opts.PICLevel)
779     Res.push_back("-pic-level", llvm::utostr(Opts.PICLevel));
780   if (Opts.PIELevel)
781     Res.push_back("-pie-level", llvm::utostr(Opts.PIELevel));
782   if (Opts.ObjCGCBitmapPrint)
783     Res.push_back("-print-ivar-layout");
784   if (Opts.NoConstantCFStrings)
785     Res.push_back("-fno-constant-cfstrings");
786   if (!Opts.AccessControl)
787     Res.push_back("-fno-access-control");
788   if (!Opts.CharIsSigned)
789     Res.push_back("-fno-signed-char");
790   if (Opts.ShortWChar)
791     Res.push_back("-fshort-wchar");
792   if (!Opts.ElideConstructors)
793     Res.push_back("-fno-elide-constructors");
794   if (Opts.getGC() != LangOptions::NonGC) {
795     if (Opts.getGC() == LangOptions::HybridGC) {
796       Res.push_back("-fobjc-gc");
797     } else {
798       assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
799       Res.push_back("-fobjc-gc-only");
800     }
801   }
802   Res.push_back("-fobjc-runtime=" + Opts.ObjCRuntime.getAsString());
803   if (Opts.ObjCAutoRefCount)
804     Res.push_back("-fobjc-arc");
805   if (Opts.ObjCRuntimeHasWeak)
806     Res.push_back("-fobjc-runtime-has-weak");
807   if (!Opts.ObjCInferRelatedResultType)
808     Res.push_back("-fno-objc-infer-related-result-type");
809 
810   if (Opts.AppleKext)
811     Res.push_back("-fapple-kext");
812 
813   if (Opts.getVisibilityMode() != DefaultVisibility) {
814     Res.push_back("-fvisibility");
815     if (Opts.getVisibilityMode() == HiddenVisibility) {
816       Res.push_back("hidden");
817     } else {
818       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
819              "Invalid visibility!");
820       Res.push_back("protected");
821     }
822   }
823   if (Opts.InlineVisibilityHidden)
824     Res.push_back("-fvisibility-inlines-hidden");
825 
826   if (Opts.getStackProtector() != 0)
827     Res.push_back("-stack-protector", llvm::utostr(Opts.getStackProtector()));
828   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth)
829     Res.push_back("-ftemplate-depth", llvm::utostr(Opts.InstantiationDepth));
830   if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth)
831     Res.push_back("-fconstexpr-depth", llvm::utostr(Opts.ConstexprCallDepth));
832   if (!Opts.ObjCConstantStringClass.empty())
833     Res.push_back("-fconstant-string-class", Opts.ObjCConstantStringClass);
834   if (Opts.FakeAddressSpaceMap)
835     Res.push_back("-ffake-address-space-map");
836   if (Opts.ParseUnknownAnytype)
837     Res.push_back("-funknown-anytype");
838   if (Opts.DebuggerSupport)
839     Res.push_back("-fdebugger-support");
840   if (Opts.DebuggerCastResultToId)
841     Res.push_back("-fdebugger-cast-result-to-id");
842   if (Opts.DebuggerObjCLiteral)
843     Res.push_back("-fdebugger-objc-literal");
844   if (Opts.DelayedTemplateParsing)
845     Res.push_back("-fdelayed-template-parsing");
846   if (Opts.Deprecated)
847     Res.push_back("-fdeprecated-macro");
848   if (Opts.ApplePragmaPack)
849     Res.push_back("-fapple-pragma-pack");
850   if (!Opts.CurrentModule.empty())
851     Res.push_back("-fmodule-name=" + Opts.CurrentModule);
852 }
853 
854 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
855                                    ToArgsList &Res) {
856   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
857     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
858                   Opts.Macros[i].first);
859   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
860     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
861     Res.push_back("-include", Opts.Includes[i]);
862   }
863   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i)
864     Res.push_back("-imacros", Opts.MacroIncludes[i]);
865   if (!Opts.UsePredefines)
866     Res.push_back("-undef");
867   if (Opts.DetailedRecord)
868     Res.push_back("-detailed-preprocessing-record");
869   if (!Opts.ImplicitPCHInclude.empty())
870     Res.push_back("-include-pch", Opts.ImplicitPCHInclude);
871   if (!Opts.ImplicitPTHInclude.empty())
872     Res.push_back("-include-pth", Opts.ImplicitPTHInclude);
873   if (!Opts.TokenCache.empty()) {
874     if (Opts.ImplicitPTHInclude.empty())
875       Res.push_back("-token-cache", Opts.TokenCache);
876     else
877       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
878              "Unsupported option combination!");
879   }
880   for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i)
881     Res.push_back("-chain-include", Opts.ChainedIncludes[i]);
882   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
883     Res.push_back("-remap-file", Opts.RemappedFiles[i].first + ";" +
884                                  Opts.RemappedFiles[i].second);
885   }
886 }
887 
888 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
889                                          ToArgsList &Res) {
890   if (!Opts.ShowCPP && !Opts.ShowMacros)
891     llvm::report_fatal_error("Invalid option combination!");
892 
893   if (Opts.ShowCPP && Opts.ShowMacros)
894     Res.push_back("-dD");
895   else if (!Opts.ShowCPP && Opts.ShowMacros)
896     Res.push_back("-dM");
897 
898   if (!Opts.ShowLineMarkers)
899     Res.push_back("-P");
900   if (Opts.ShowComments)
901     Res.push_back("-C");
902   if (Opts.ShowMacroComments)
903     Res.push_back("-CC");
904 }
905 
906 static void TargetOptsToArgs(const TargetOptions &Opts,
907                              ToArgsList &Res) {
908   Res.push_back("-triple");
909   Res.push_back(Opts.Triple);
910   if (!Opts.CPU.empty())
911     Res.push_back("-target-cpu", Opts.CPU);
912   if (!Opts.ABI.empty())
913     Res.push_back("-target-abi", Opts.ABI);
914   if (!Opts.LinkerVersion.empty())
915     Res.push_back("-target-linker-version", Opts.LinkerVersion);
916   if (!Opts.CXXABI.empty())
917     Res.push_back("-cxx-abi", Opts.CXXABI);
918   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i)
919     Res.push_back("-target-feature", Opts.Features[i]);
920 }
921 
922 void CompilerInvocation::toArgs(std::vector<std::string> &Res) const {
923   ToArgsList List(Res);
924   AnalyzerOptsToArgs(getAnalyzerOpts(), List);
925   CodeGenOptsToArgs(getCodeGenOpts(), List);
926   DependencyOutputOptsToArgs(getDependencyOutputOpts(), List);
927   DiagnosticOptsToArgs(getDiagnosticOpts(), List);
928   FileSystemOptsToArgs(getFileSystemOpts(), List);
929   FrontendOptsToArgs(getFrontendOpts(), List);
930   HeaderSearchOptsToArgs(getHeaderSearchOpts(), List);
931   LangOptsToArgs(*getLangOpts(), List);
932   PreprocessorOptsToArgs(getPreprocessorOpts(), List);
933   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), List);
934   TargetOptsToArgs(getTargetOpts(), List);
935 }
936 
937 //===----------------------------------------------------------------------===//
938 // Deserialization (to args)
939 //===----------------------------------------------------------------------===//
940 
941 using namespace clang::driver;
942 using namespace clang::driver::options;
943 
944 //
945 
946 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
947                                      DiagnosticsEngine &Diags) {
948   unsigned DefaultOpt = 0;
949   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
950     DefaultOpt = 2;
951 
952   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
953     if (A->getOption().matches(options::OPT_O0))
954       return 0;
955 
956     assert (A->getOption().matches(options::OPT_O));
957 
958     llvm::StringRef S(A->getValue(Args));
959     if (S == "s" || S == "z" || S.empty())
960       return 2;
961 
962     return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
963   }
964 
965   return DefaultOpt;
966 }
967 
968 static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
969                                          DiagnosticsEngine &Diags) {
970   if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
971     if (A->getOption().matches(options::OPT_O)) {
972       switch (A->getValue(Args)[0]) {
973       default:
974         return 0;
975       case 's':
976         return 1;
977       case 'z':
978         return 2;
979       }
980     }
981   }
982   return 0;
983 }
984 
985 static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
986   for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
987          E = Args.filtered_end(); I != E; ++I) {
988     Arg *A = *I;
989     // If the argument is a pure flag, add its name (minus the "-W" at the beginning)
990     // to the warning list. Else, add its value (for the OPT_W case).
991     if (A->getOption().getKind() == Option::FlagClass) {
992       Warnings.push_back(A->getOption().getName().substr(2));
993     } else {
994       for (unsigned Idx = 0, End = A->getNumValues();
995            Idx < End; ++Idx) {
996         StringRef V = A->getValue(Args, Idx);
997         // "-Wl," and such are not warning options.
998         // FIXME: Should be handled by putting these in separate flags.
999         if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
1000           continue;
1001 
1002         Warnings.push_back(V);
1003       }
1004     }
1005   }
1006 }
1007 
1008 static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
1009                               DiagnosticsEngine &Diags) {
1010   using namespace options;
1011   bool Success = true;
1012   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
1013     StringRef Name = A->getValue(Args);
1014     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
1015 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
1016       .Case(CMDFLAG, NAME##Model)
1017 #include "clang/Frontend/Analyses.def"
1018       .Default(NumStores);
1019     if (Value == NumStores) {
1020       Diags.Report(diag::err_drv_invalid_value)
1021         << A->getAsString(Args) << Name;
1022       Success = false;
1023     } else {
1024       Opts.AnalysisStoreOpt = Value;
1025     }
1026   }
1027 
1028   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
1029     StringRef Name = A->getValue(Args);
1030     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
1031 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
1032       .Case(CMDFLAG, NAME##Model)
1033 #include "clang/Frontend/Analyses.def"
1034       .Default(NumConstraints);
1035     if (Value == NumConstraints) {
1036       Diags.Report(diag::err_drv_invalid_value)
1037         << A->getAsString(Args) << Name;
1038       Success = false;
1039     } else {
1040       Opts.AnalysisConstraintsOpt = Value;
1041     }
1042   }
1043 
1044   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1045     StringRef Name = A->getValue(Args);
1046     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1047 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1048       .Case(CMDFLAG, PD_##NAME)
1049 #include "clang/Frontend/Analyses.def"
1050       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1051     if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1052       Diags.Report(diag::err_drv_invalid_value)
1053         << A->getAsString(Args) << Name;
1054       Success = false;
1055     } else {
1056       Opts.AnalysisDiagOpt = Value;
1057     }
1058   }
1059 
1060   if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1061     StringRef Name = A->getValue(Args);
1062     AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1063 #define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1064       .Case(CMDFLAG, NAME)
1065 #include "clang/Frontend/Analyses.def"
1066       .Default(NumPurgeModes);
1067     if (Value == NumPurgeModes) {
1068       Diags.Report(diag::err_drv_invalid_value)
1069         << A->getAsString(Args) << Name;
1070       Success = false;
1071     } else {
1072       Opts.AnalysisPurgeOpt = Value;
1073     }
1074   }
1075 
1076   if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
1077     StringRef Name = A->getValue(Args);
1078     AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
1079 #define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
1080       .Case(CMDFLAG, NAME)
1081 #include "clang/Frontend/Analyses.def"
1082       .Default(NumIPAModes);
1083     if (Value == NumIPAModes) {
1084       Diags.Report(diag::err_drv_invalid_value)
1085         << A->getAsString(Args) << Name;
1086       Success = false;
1087     } else {
1088       Opts.IPAMode = Value;
1089     }
1090   }
1091 
1092   if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
1093     StringRef Name = A->getValue(Args);
1094     AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
1095 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
1096       .Case(CMDFLAG, NAME)
1097 #include "clang/Frontend/Analyses.def"
1098       .Default(NumInliningModes);
1099     if (Value == NumInliningModes) {
1100       Diags.Report(diag::err_drv_invalid_value)
1101         << A->getAsString(Args) << Name;
1102       Success = false;
1103     } else {
1104       Opts.InliningMode = Value;
1105     }
1106   }
1107 
1108   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1109   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1110   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1111   Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
1112   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1113   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1114   Opts.AnalyzeNestedBlocks =
1115     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1116   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
1117   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1118   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1119   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
1120   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
1121   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1122   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1123   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1124   Opts.EagerlyTrimEGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1125   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1126   Opts.InlineMaxStackDepth =
1127     Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1128                             Opts.InlineMaxStackDepth, Diags);
1129   Opts.InlineMaxFunctionSize =
1130     Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1131                             Opts.InlineMaxFunctionSize, Diags);
1132 
1133   Opts.CheckersControlList.clear();
1134   for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1135                                              OPT_analyzer_disable_checker),
1136          ie = Args.filtered_end(); it != ie; ++it) {
1137     const Arg *A = *it;
1138     A->claim();
1139     bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1140     // We can have a list of comma separated checker names, e.g:
1141     // '-analyzer-checker=cocoa,unix'
1142     StringRef checkerList = A->getValue(Args);
1143     SmallVector<StringRef, 4> checkers;
1144     checkerList.split(checkers, ",");
1145     for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1146       Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1147   }
1148 
1149   return Success;
1150 }
1151 
1152 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1153   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1154   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1155   return true;
1156 }
1157 
1158 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1159                              DiagnosticsEngine &Diags) {
1160   using namespace options;
1161   bool Success = true;
1162 
1163   unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1164   if (OptLevel > 3) {
1165     Diags.Report(diag::err_drv_invalid_value)
1166       << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1167     OptLevel = 3;
1168     Success = false;
1169   }
1170   Opts.OptimizationLevel = OptLevel;
1171 
1172   // We must always run at least the always inlining pass.
1173   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1174     : CodeGenOptions::OnlyAlwaysInlining;
1175   // -fno-inline-functions overrides OptimizationLevel > 1.
1176   Opts.NoInline = Args.hasArg(OPT_fno_inline);
1177   Opts.Inlining = Args.hasArg(OPT_fno_inline_functions) ?
1178     CodeGenOptions::OnlyAlwaysInlining : Opts.Inlining;
1179 
1180   if (Args.hasArg(OPT_gline_tables_only)) {
1181     Opts.DebugInfo = CodeGenOptions::DebugLineTablesOnly;
1182   } else if (Args.hasArg(OPT_g_Flag)) {
1183     if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
1184       Opts.DebugInfo = CodeGenOptions::LimitedDebugInfo;
1185     else
1186       Opts.DebugInfo = CodeGenOptions::FullDebugInfo;
1187   }
1188 
1189   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1190   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1191   Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1192   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1193     OPT_fuse_register_sized_bitfield_access);
1194   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1195   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1196   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1197   Opts.NoCommon = Args.hasArg(OPT_fno_common);
1198   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1199   Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
1200   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1201                             Args.hasArg(OPT_ffreestanding));
1202   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1203                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1204 
1205   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1206   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1207   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1208   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1209   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1210   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1211   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1212   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1213   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1214   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1215   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1216   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1217   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1218   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1219                        Args.hasArg(OPT_cl_finite_math_only)||
1220                        Args.hasArg(OPT_cl_fast_relaxed_math));
1221   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1222                        Args.hasArg(OPT_cl_finite_math_only)||
1223                        Args.hasArg(OPT_cl_fast_relaxed_math));
1224   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1225   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1226   Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1227   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1228   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1229   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1230   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1231   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1232   Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1233   Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1234   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1235   Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
1236   Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1237                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1238                       Args.hasArg(OPT_cl_fast_relaxed_math);
1239   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1240   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1241   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1242   Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
1243                                                 Diags);
1244   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
1245 
1246   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1247   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1248 
1249   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1250   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1251 
1252   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1253   Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1254   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1255   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1256   Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1257   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1258   Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1259   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1260   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1261     StringRef Val = A->getValue(Args);
1262     Val.getAsInteger(10, Opts.StackAlignment);
1263   }
1264 
1265   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1266     StringRef Name = A->getValue(Args);
1267     unsigned Method = llvm::StringSwitch<unsigned>(Name)
1268       .Case("legacy", CodeGenOptions::Legacy)
1269       .Case("non-legacy", CodeGenOptions::NonLegacy)
1270       .Case("mixed", CodeGenOptions::Mixed)
1271       .Default(~0U);
1272     if (Method == ~0U) {
1273       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1274       Success = false;
1275     } else {
1276       Opts.ObjCDispatchMethod = Method;
1277     }
1278   }
1279 
1280   if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1281     StringRef Name = A->getValue(Args);
1282     unsigned Model = llvm::StringSwitch<unsigned>(Name)
1283         .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1284         .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1285         .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1286         .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1287         .Default(~0U);
1288     if (Model == ~0U) {
1289       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1290       Success = false;
1291     } else {
1292       Opts.DefaultTLSModel = static_cast<CodeGenOptions::TLSModel>(Model);
1293     }
1294   }
1295 
1296   return Success;
1297 }
1298 
1299 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1300                                       ArgList &Args) {
1301   using namespace options;
1302   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1303   Opts.Targets = Args.getAllArgValues(OPT_MT);
1304   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1305   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1306   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1307   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1308   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1309   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1310 }
1311 
1312 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1313                                 DiagnosticsEngine *Diags) {
1314   using namespace options;
1315   bool Success = true;
1316 
1317   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1318   Opts.DiagnosticSerializationFile =
1319     Args.getLastArgValue(OPT_diagnostic_serialized_file);
1320   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1321   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1322   Opts.Pedantic = Args.hasArg(OPT_pedantic);
1323   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1324   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1325   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1326   Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1327                                  OPT_fno_show_column,
1328                                  /*Default=*/true);
1329   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1330   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1331   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1332 
1333   // Default behavior is to not to show note include stacks.
1334   Opts.ShowNoteIncludeStack = false;
1335   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1336                                OPT_fno_diagnostics_show_note_include_stack))
1337     if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1338       Opts.ShowNoteIncludeStack = true;
1339 
1340   StringRef ShowOverloads =
1341     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1342   if (ShowOverloads == "best")
1343     Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1344   else if (ShowOverloads == "all")
1345     Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1346   else {
1347     Success = false;
1348     if (Diags)
1349       Diags->Report(diag::err_drv_invalid_value)
1350       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1351       << ShowOverloads;
1352   }
1353 
1354   StringRef ShowCategory =
1355     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1356   if (ShowCategory == "none")
1357     Opts.ShowCategories = 0;
1358   else if (ShowCategory == "id")
1359     Opts.ShowCategories = 1;
1360   else if (ShowCategory == "name")
1361     Opts.ShowCategories = 2;
1362   else {
1363     Success = false;
1364     if (Diags)
1365       Diags->Report(diag::err_drv_invalid_value)
1366       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1367       << ShowCategory;
1368   }
1369 
1370   StringRef Format =
1371     Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1372   if (Format == "clang")
1373     Opts.Format = DiagnosticOptions::Clang;
1374   else if (Format == "msvc")
1375     Opts.Format = DiagnosticOptions::Msvc;
1376   else if (Format == "vi")
1377     Opts.Format = DiagnosticOptions::Vi;
1378   else {
1379     Success = false;
1380     if (Diags)
1381       Diags->Report(diag::err_drv_invalid_value)
1382       << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1383       << Format;
1384   }
1385 
1386   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1387   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1388   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1389   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1390   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1391   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1392   Opts.MacroBacktraceLimit
1393     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1394                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1395   Opts.TemplateBacktraceLimit
1396     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1397                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
1398                          Diags);
1399   Opts.ConstexprBacktraceLimit
1400     = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1401                          DiagnosticOptions::DefaultConstexprBacktraceLimit,
1402                          Diags);
1403   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1404                                     DiagnosticOptions::DefaultTabStop, Diags);
1405   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1406     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1407     if (Diags)
1408       Diags->Report(diag::warn_ignoring_ftabstop_value)
1409       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1410   }
1411   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1412   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1413   addWarningArgs(Args, Opts.Warnings);
1414 
1415   return Success;
1416 }
1417 
1418 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1419   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1420 }
1421 
1422 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1423                                    DiagnosticsEngine &Diags) {
1424   using namespace options;
1425   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1426   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1427     switch (A->getOption().getID()) {
1428     default:
1429       llvm_unreachable("Invalid option in group!");
1430     case OPT_ast_dump:
1431       Opts.ProgramAction = frontend::ASTDump; break;
1432     case OPT_ast_dump_xml:
1433       Opts.ProgramAction = frontend::ASTDumpXML; break;
1434     case OPT_ast_print:
1435       Opts.ProgramAction = frontend::ASTPrint; break;
1436     case OPT_ast_view:
1437       Opts.ProgramAction = frontend::ASTView; break;
1438     case OPT_dump_raw_tokens:
1439       Opts.ProgramAction = frontend::DumpRawTokens; break;
1440     case OPT_dump_tokens:
1441       Opts.ProgramAction = frontend::DumpTokens; break;
1442     case OPT_S:
1443       Opts.ProgramAction = frontend::EmitAssembly; break;
1444     case OPT_emit_llvm_bc:
1445       Opts.ProgramAction = frontend::EmitBC; break;
1446     case OPT_emit_html:
1447       Opts.ProgramAction = frontend::EmitHTML; break;
1448     case OPT_emit_llvm:
1449       Opts.ProgramAction = frontend::EmitLLVM; break;
1450     case OPT_emit_llvm_only:
1451       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1452     case OPT_emit_codegen_only:
1453       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1454     case OPT_emit_obj:
1455       Opts.ProgramAction = frontend::EmitObj; break;
1456     case OPT_fixit_EQ:
1457       Opts.FixItSuffix = A->getValue(Args);
1458       // fall-through!
1459     case OPT_fixit:
1460       Opts.ProgramAction = frontend::FixIt; break;
1461     case OPT_emit_module:
1462       Opts.ProgramAction = frontend::GenerateModule; break;
1463     case OPT_emit_pch:
1464       Opts.ProgramAction = frontend::GeneratePCH; break;
1465     case OPT_emit_pth:
1466       Opts.ProgramAction = frontend::GeneratePTH; break;
1467     case OPT_init_only:
1468       Opts.ProgramAction = frontend::InitOnly; break;
1469     case OPT_fsyntax_only:
1470       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1471     case OPT_print_decl_contexts:
1472       Opts.ProgramAction = frontend::PrintDeclContext; break;
1473     case OPT_print_preamble:
1474       Opts.ProgramAction = frontend::PrintPreamble; break;
1475     case OPT_E:
1476       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1477     case OPT_rewrite_macros:
1478       Opts.ProgramAction = frontend::RewriteMacros; break;
1479     case OPT_rewrite_objc:
1480       Opts.ProgramAction = frontend::RewriteObjC; break;
1481     case OPT_rewrite_test:
1482       Opts.ProgramAction = frontend::RewriteTest; break;
1483     case OPT_analyze:
1484       Opts.ProgramAction = frontend::RunAnalysis; break;
1485     case OPT_migrate:
1486       Opts.ProgramAction = frontend::MigrateSource; break;
1487     case OPT_Eonly:
1488       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1489     }
1490   }
1491 
1492   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1493     Opts.Plugins.push_back(A->getValue(Args,0));
1494     Opts.ProgramAction = frontend::PluginAction;
1495     Opts.ActionName = A->getValue(Args);
1496 
1497     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1498            end = Args.filtered_end(); it != end; ++it) {
1499       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1500         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1501     }
1502   }
1503 
1504   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1505   Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1506   for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1507     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1508            end = Args.filtered_end(); it != end; ++it) {
1509       if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1510         Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1511     }
1512   }
1513 
1514   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1515     Opts.CodeCompletionAt =
1516       ParsedSourceLocation::FromString(A->getValue(Args));
1517     if (Opts.CodeCompletionAt.FileName.empty())
1518       Diags.Report(diag::err_drv_invalid_value)
1519         << A->getAsString(Args) << A->getValue(Args);
1520   }
1521   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1522 
1523   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1524   Opts.Plugins = Args.getAllArgValues(OPT_load);
1525   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1526   Opts.ShowHelp = Args.hasArg(OPT_help);
1527   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1528   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1529   Opts.ShowVersion = Args.hasArg(OPT_version);
1530   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1531   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1532   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1533   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1534   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1535   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1536 
1537   Opts.CodeCompleteOpts.IncludeMacros
1538     = Args.hasArg(OPT_code_completion_macros);
1539   Opts.CodeCompleteOpts.IncludeCodePatterns
1540     = Args.hasArg(OPT_code_completion_patterns);
1541   Opts.CodeCompleteOpts.IncludeGlobals
1542     = !Args.hasArg(OPT_no_code_completion_globals);
1543   Opts.CodeCompleteOpts.IncludeBriefComments
1544     = Args.hasArg(OPT_code_completion_brief_comments);
1545 
1546   Opts.OverrideRecordLayoutsFile
1547     = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1548   if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1549                                      OPT_arcmt_modify,
1550                                      OPT_arcmt_migrate)) {
1551     switch (A->getOption().getID()) {
1552     default:
1553       llvm_unreachable("missed a case");
1554     case OPT_arcmt_check:
1555       Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1556       break;
1557     case OPT_arcmt_modify:
1558       Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1559       break;
1560     case OPT_arcmt_migrate:
1561       Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1562       break;
1563     }
1564   }
1565   Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1566   Opts.ARCMTMigrateReportOut
1567     = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1568   Opts.ARCMTMigrateEmitARCErrors
1569     = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1570 
1571   if (Args.hasArg(OPT_objcmt_migrate_literals))
1572     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1573   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1574     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1575 
1576   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1577       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1578     Diags.Report(diag::err_drv_argument_not_allowed_with)
1579       << "ARC migration" << "ObjC migration";
1580   }
1581 
1582   InputKind DashX = IK_None;
1583   if (const Arg *A = Args.getLastArg(OPT_x)) {
1584     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1585       .Case("c", IK_C)
1586       .Case("cl", IK_OpenCL)
1587       .Case("cuda", IK_CUDA)
1588       .Case("c++", IK_CXX)
1589       .Case("objective-c", IK_ObjC)
1590       .Case("objective-c++", IK_ObjCXX)
1591       .Case("cpp-output", IK_PreprocessedC)
1592       .Case("assembler-with-cpp", IK_Asm)
1593       .Case("c++-cpp-output", IK_PreprocessedCXX)
1594       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1595       .Case("objc-cpp-output", IK_PreprocessedObjC)
1596       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1597       .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1598       .Case("c-header", IK_C)
1599       .Case("cl-header", IK_OpenCL)
1600       .Case("objective-c-header", IK_ObjC)
1601       .Case("c++-header", IK_CXX)
1602       .Case("objective-c++-header", IK_ObjCXX)
1603       .Case("ast", IK_AST)
1604       .Case("ir", IK_LLVM_IR)
1605       .Default(IK_None);
1606     if (DashX == IK_None)
1607       Diags.Report(diag::err_drv_invalid_value)
1608         << A->getAsString(Args) << A->getValue(Args);
1609   }
1610 
1611   // '-' is the default input if none is given.
1612   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1613   Opts.Inputs.clear();
1614   if (Inputs.empty())
1615     Inputs.push_back("-");
1616   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1617     InputKind IK = DashX;
1618     if (IK == IK_None) {
1619       IK = FrontendOptions::getInputKindForExtension(
1620         StringRef(Inputs[i]).rsplit('.').second);
1621       // FIXME: Remove this hack.
1622       if (i == 0)
1623         DashX = IK;
1624     }
1625     Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1626   }
1627 
1628   return DashX;
1629 }
1630 
1631 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1632                                                  void *MainAddr) {
1633   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1634 
1635   if (!P.isEmpty()) {
1636     P.eraseComponent();  // Remove /clang from foo/bin/clang
1637     P.eraseComponent();  // Remove /bin   from foo/bin
1638 
1639     // Get foo/lib/clang/<version>/include
1640     P.appendComponent("lib");
1641     P.appendComponent("clang");
1642     P.appendComponent(CLANG_VERSION_STRING);
1643   }
1644 
1645   return P.str();
1646 }
1647 
1648 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1649   using namespace options;
1650   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1651   Opts.Verbose = Args.hasArg(OPT_v);
1652   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1653   Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1654   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1655   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1656     Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1657   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1658   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1659   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1660 
1661   // Add -I..., -F..., and -index-header-map options in order.
1662   bool IsIndexHeaderMap = false;
1663   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1664                                              OPT_index_header_map),
1665        ie = Args.filtered_end(); it != ie; ++it) {
1666     if ((*it)->getOption().matches(OPT_index_header_map)) {
1667       // -index-header-map applies to the next -I or -F.
1668       IsIndexHeaderMap = true;
1669       continue;
1670     }
1671 
1672     frontend::IncludeDirGroup Group
1673       = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1674 
1675     Opts.AddPath((*it)->getValue(Args), Group, true,
1676                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1677     IsIndexHeaderMap = false;
1678   }
1679 
1680   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1681   StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1682   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1683                                              OPT_iwithprefixbefore),
1684          ie = Args.filtered_end(); it != ie; ++it) {
1685     const Arg *A = *it;
1686     if (A->getOption().matches(OPT_iprefix))
1687       Prefix = A->getValue(Args);
1688     else if (A->getOption().matches(OPT_iwithprefix))
1689       Opts.AddPath(Prefix.str() + A->getValue(Args),
1690                    frontend::System, false, false, false);
1691     else
1692       Opts.AddPath(Prefix.str() + A->getValue(Args),
1693                    frontend::Angled, false, false, false);
1694   }
1695 
1696   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1697          ie = Args.filtered_end(); it != ie; ++it)
1698     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1699   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1700          ie = Args.filtered_end(); it != ie; ++it)
1701     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1702   for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1703          OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1704     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1705                  !(*it)->getOption().matches(OPT_iwithsysroot));
1706   for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1707          ie = Args.filtered_end(); it != ie; ++it)
1708     Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1709                  true);
1710 
1711   // Add the paths for the various language specific isystem flags.
1712   for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1713        ie = Args.filtered_end(); it != ie; ++it)
1714     Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1715   for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1716        ie = Args.filtered_end(); it != ie; ++it)
1717     Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1718   for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1719        ie = Args.filtered_end(); it != ie; ++it)
1720     Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1721   for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1722        ie = Args.filtered_end(); it != ie; ++it)
1723     Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1724                  true);
1725 
1726   // Add the internal paths from a driver that detects standard include paths.
1727   for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1728                                             OPT_internal_externc_isystem),
1729                     E = Args.filtered_end();
1730        I != E; ++I)
1731     Opts.AddPath((*I)->getValue(Args), frontend::System,
1732                  false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1733                  (*I)->getOption().matches(OPT_internal_externc_isystem));
1734 
1735   // Add the path prefixes which are implicitly treated as being system headers.
1736   for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1737                                             OPT_ino_system_prefix),
1738                     E = Args.filtered_end();
1739        I != E; ++I)
1740     Opts.AddSystemHeaderPrefix((*I)->getValue(Args),
1741                                (*I)->getOption().matches(OPT_isystem_prefix));
1742 }
1743 
1744 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1745                                          LangStandard::Kind LangStd) {
1746   // Set some properties which depend solely on the input kind; it would be nice
1747   // to move these to the language standard, and have the driver resolve the
1748   // input kind + language standard.
1749   if (IK == IK_Asm) {
1750     Opts.AsmPreprocessor = 1;
1751   } else if (IK == IK_ObjC ||
1752              IK == IK_ObjCXX ||
1753              IK == IK_PreprocessedObjC ||
1754              IK == IK_PreprocessedObjCXX) {
1755     Opts.ObjC1 = Opts.ObjC2 = 1;
1756   }
1757 
1758   if (LangStd == LangStandard::lang_unspecified) {
1759     // Based on the base language, pick one.
1760     switch (IK) {
1761     case IK_None:
1762     case IK_AST:
1763     case IK_LLVM_IR:
1764       llvm_unreachable("Invalid input kind!");
1765     case IK_OpenCL:
1766       LangStd = LangStandard::lang_opencl;
1767       break;
1768     case IK_CUDA:
1769       LangStd = LangStandard::lang_cuda;
1770       break;
1771     case IK_Asm:
1772     case IK_C:
1773     case IK_PreprocessedC:
1774     case IK_ObjC:
1775     case IK_PreprocessedObjC:
1776       LangStd = LangStandard::lang_gnu99;
1777       break;
1778     case IK_CXX:
1779     case IK_PreprocessedCXX:
1780     case IK_ObjCXX:
1781     case IK_PreprocessedObjCXX:
1782       LangStd = LangStandard::lang_gnucxx98;
1783       break;
1784     }
1785   }
1786 
1787   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1788   Opts.BCPLComment = Std.hasBCPLComments();
1789   Opts.C99 = Std.isC99();
1790   Opts.C11 = Std.isC11();
1791   Opts.CPlusPlus = Std.isCPlusPlus();
1792   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1793   Opts.Digraphs = Std.hasDigraphs();
1794   Opts.GNUMode = Std.isGNUMode();
1795   Opts.GNUInline = !Std.isC99();
1796   Opts.HexFloats = Std.hasHexFloats();
1797   Opts.ImplicitInt = Std.hasImplicitInt();
1798 
1799   // Set OpenCL Version.
1800   if (LangStd == LangStandard::lang_opencl) {
1801     Opts.OpenCL = 1;
1802     Opts.OpenCLVersion = 100;
1803   }
1804   else if (LangStd == LangStandard::lang_opencl11) {
1805       Opts.OpenCL = 1;
1806       Opts.OpenCLVersion = 110;
1807   }
1808   else if (LangStd == LangStandard::lang_opencl12) {
1809     Opts.OpenCL = 1;
1810     Opts.OpenCLVersion = 120;
1811   }
1812 
1813   // OpenCL has some additional defaults.
1814   if (Opts.OpenCL) {
1815     Opts.AltiVec = 0;
1816     Opts.CXXOperatorNames = 1;
1817     Opts.LaxVectorConversions = 0;
1818     Opts.DefaultFPContract = 1;
1819   }
1820 
1821   if (LangStd == LangStandard::lang_cuda)
1822     Opts.CUDA = 1;
1823 
1824   // OpenCL and C++ both have bool, true, false keywords.
1825   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1826 
1827   Opts.GNUKeywords = Opts.GNUMode;
1828   Opts.CXXOperatorNames = Opts.CPlusPlus;
1829 
1830   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1831   // is specified, or -std is set to a conforming mode.
1832   Opts.Trigraphs = !Opts.GNUMode;
1833 
1834   Opts.DollarIdents = !Opts.AsmPreprocessor;
1835 }
1836 
1837 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1838                           DiagnosticsEngine &Diags) {
1839   // FIXME: Cleanup per-file based stuff.
1840   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1841   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1842     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1843 #define LANGSTANDARD(id, name, desc, features) \
1844       .Case(name, LangStandard::lang_##id)
1845 #include "clang/Frontend/LangStandards.def"
1846       .Default(LangStandard::lang_unspecified);
1847     if (LangStd == LangStandard::lang_unspecified)
1848       Diags.Report(diag::err_drv_invalid_value)
1849         << A->getAsString(Args) << A->getValue(Args);
1850     else {
1851       // Valid standard, check to make sure language and standard are compatable.
1852       const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1853       switch (IK) {
1854       case IK_C:
1855       case IK_ObjC:
1856       case IK_PreprocessedC:
1857       case IK_PreprocessedObjC:
1858         if (!(Std.isC89() || Std.isC99()))
1859           Diags.Report(diag::err_drv_argument_not_allowed_with)
1860             << A->getAsString(Args) << "C/ObjC";
1861         break;
1862       case IK_CXX:
1863       case IK_ObjCXX:
1864       case IK_PreprocessedCXX:
1865       case IK_PreprocessedObjCXX:
1866         if (!Std.isCPlusPlus())
1867           Diags.Report(diag::err_drv_argument_not_allowed_with)
1868             << A->getAsString(Args) << "C++/ObjC++";
1869         break;
1870       case IK_OpenCL:
1871         if (!Std.isC99())
1872           Diags.Report(diag::err_drv_argument_not_allowed_with)
1873             << A->getAsString(Args) << "OpenCL";
1874         break;
1875       case IK_CUDA:
1876         if (!Std.isCPlusPlus())
1877           Diags.Report(diag::err_drv_argument_not_allowed_with)
1878             << A->getAsString(Args) << "CUDA";
1879         break;
1880       default:
1881         break;
1882       }
1883     }
1884   }
1885 
1886   // -cl-std only applies for OpenCL language standards.
1887   // Override the -std option in this case.
1888   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1889     LangStandard::Kind OpenCLLangStd
1890     = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1891     .Case("CL", LangStandard::lang_opencl)
1892     .Case("CL1.1", LangStandard::lang_opencl11)
1893     .Case("CL1.2", LangStandard::lang_opencl12)
1894     .Default(LangStandard::lang_unspecified);
1895 
1896     if (OpenCLLangStd == LangStandard::lang_unspecified) {
1897       Diags.Report(diag::err_drv_invalid_value)
1898       << A->getAsString(Args) << A->getValue(Args);
1899     }
1900     else
1901       LangStd = OpenCLLangStd;
1902   }
1903 
1904   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1905 
1906   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1907   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1908   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1909   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1910   // name, as it doesn't seem a useful distinction.
1911   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1912                                   Opts.GNUKeywords);
1913 
1914   if (Args.hasArg(OPT_fno_operator_names))
1915     Opts.CXXOperatorNames = 0;
1916 
1917   if (Opts.ObjC1) {
1918     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1919       StringRef value = arg->getValue(Args);
1920       if (Opts.ObjCRuntime.tryParse(value))
1921         Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1922     }
1923 
1924     if (Args.hasArg(OPT_fobjc_gc_only))
1925       Opts.setGC(LangOptions::GCOnly);
1926     else if (Args.hasArg(OPT_fobjc_gc))
1927       Opts.setGC(LangOptions::HybridGC);
1928     else if (Args.hasArg(OPT_fobjc_arc)) {
1929       Opts.ObjCAutoRefCount = 1;
1930       if (!Opts.ObjCRuntime.isNonFragile())
1931         Diags.Report(diag::err_arc_nonfragile_abi);
1932     }
1933 
1934     Opts.ObjCRuntimeHasWeak = Opts.ObjCRuntime.hasWeak();
1935     if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1936       Opts.ObjCRuntimeHasWeak = 1;
1937 
1938     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1939       Opts.ObjCInferRelatedResultType = 0;
1940   }
1941 
1942   if (Args.hasArg(OPT_fgnu89_inline))
1943     Opts.GNUInline = 1;
1944 
1945   if (Args.hasArg(OPT_fapple_kext)) {
1946     if (!Opts.CPlusPlus)
1947       Diags.Report(diag::warn_c_kext);
1948     else
1949       Opts.AppleKext = 1;
1950   }
1951 
1952   if (Args.hasArg(OPT_print_ivar_layout))
1953     Opts.ObjCGCBitmapPrint = 1;
1954   if (Args.hasArg(OPT_fno_constant_cfstrings))
1955     Opts.NoConstantCFStrings = 1;
1956 
1957   if (Args.hasArg(OPT_faltivec))
1958     Opts.AltiVec = 1;
1959 
1960   if (Args.hasArg(OPT_pthread))
1961     Opts.POSIXThreads = 1;
1962 
1963   if (Args.hasArg(OPT_fdelayed_template_parsing))
1964     Opts.DelayedTemplateParsing = 1;
1965 
1966   StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1967   if (Vis == "default")
1968     Opts.setVisibilityMode(DefaultVisibility);
1969   else if (Vis == "hidden")
1970     Opts.setVisibilityMode(HiddenVisibility);
1971   else if (Vis == "protected")
1972     // FIXME: diagnose if target does not support protected visibility
1973     Opts.setVisibilityMode(ProtectedVisibility);
1974   else
1975     Diags.Report(diag::err_drv_invalid_value)
1976       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1977 
1978   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1979     Opts.InlineVisibilityHidden = 1;
1980 
1981   if (Args.hasArg(OPT_ftrapv)) {
1982     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1983     // Set the handler, if one is specified.
1984     Opts.OverflowHandler =
1985         Args.getLastArgValue(OPT_ftrapv_handler);
1986   }
1987   else if (Args.hasArg(OPT_fwrapv))
1988     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1989 
1990   if (Args.hasArg(OPT_trigraphs))
1991     Opts.Trigraphs = 1;
1992 
1993   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1994                                    OPT_fno_dollars_in_identifiers,
1995                                    Opts.DollarIdents);
1996   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1997   Opts.MicrosoftExt
1998     = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
1999   Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
2000   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
2001   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2002   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2003   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2004                                    Opts.ConstStrings);
2005   if (Args.hasArg(OPT_fno_lax_vector_conversions))
2006     Opts.LaxVectorConversions = 0;
2007   if (Args.hasArg(OPT_fno_threadsafe_statics))
2008     Opts.ThreadsafeStatics = 0;
2009   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2010   Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2011   Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2012   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2013   Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2014 
2015   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
2016   Opts.Blocks = Args.hasArg(OPT_fblocks);
2017   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2018   Opts.Modules = Args.hasArg(OPT_fmodules);
2019   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
2020   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
2021   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2022   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2023   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2024   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
2025   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2026   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2027   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2028   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
2029   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
2030                                                     Diags);
2031   Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
2032                                                     Diags);
2033   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2034   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
2035                                                     0, Diags);
2036   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2037   Opts.ObjCConstantStringClass =
2038     Args.getLastArgValue(OPT_fconstant_string_class);
2039   Opts.ObjCDefaultSynthProperties =
2040     Args.hasArg(OPT_fobjc_default_synthesize_properties);
2041   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
2042   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2043   Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
2044   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
2045   Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
2046   Opts.Static = Args.hasArg(OPT_static_define);
2047   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2048   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2049                         || Args.hasArg(OPT_fdump_record_layouts);
2050   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2051   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2052   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2053   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2054   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2055   Opts.MRTD = Args.hasArg(OPT_mrtd);
2056   Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2057   Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2058   Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2059   Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2060   Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2061   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2062   Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
2063   Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
2064   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2065   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
2066 
2067   // Record whether the __DEPRECATED define was requested.
2068   Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2069                                  OPT_fno_deprecated_macro,
2070                                  Opts.Deprecated);
2071 
2072   // FIXME: Eliminate this dependency.
2073   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
2074   Opts.Optimize = Opt != 0;
2075   Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
2076 
2077   // This is the __NO_INLINE__ define, which just depends on things like the
2078   // optimization level and -fno-inline, not actually whether the backend has
2079   // inlining enabled.
2080   Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2081 
2082   Opts.FastMath = Args.hasArg(OPT_ffast_math);
2083 
2084   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
2085   switch (SSP) {
2086   default:
2087     Diags.Report(diag::err_drv_invalid_value)
2088       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2089     break;
2090   case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2091   case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2092   case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
2093   }
2094 }
2095 
2096 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2097                                   FileManager &FileMgr,
2098                                   DiagnosticsEngine &Diags) {
2099   using namespace options;
2100   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2101   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2102   if (const Arg *A = Args.getLastArg(OPT_token_cache))
2103       Opts.TokenCache = A->getValue(Args);
2104   else
2105     Opts.TokenCache = Opts.ImplicitPTHInclude;
2106   Opts.UsePredefines = !Args.hasArg(OPT_undef);
2107   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2108   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2109 
2110   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2111   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
2112          ie = Args.filtered_end(); it != ie; ++it) {
2113     const Arg *A = *it;
2114     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
2115   }
2116 
2117   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2118     StringRef Value(A->getValue(Args));
2119     size_t Comma = Value.find(',');
2120     unsigned Bytes = 0;
2121     unsigned EndOfLine = 0;
2122 
2123     if (Comma == StringRef::npos ||
2124         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2125         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2126       Diags.Report(diag::err_drv_preamble_format);
2127     else {
2128       Opts.PrecompiledPreambleBytes.first = Bytes;
2129       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2130     }
2131   }
2132 
2133   // Add macros from the command line.
2134   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
2135          ie = Args.filtered_end(); it != ie; ++it) {
2136     if ((*it)->getOption().matches(OPT_D))
2137       Opts.addMacroDef((*it)->getValue(Args));
2138     else
2139       Opts.addMacroUndef((*it)->getValue(Args));
2140   }
2141 
2142   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2143 
2144   // Add the ordered list of -includes.
2145   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
2146                                              OPT_include_pth),
2147          ie = Args.filtered_end(); it != ie; ++it) {
2148     const Arg *A = *it;
2149     // PCH is handled specially, we need to extra the original include path.
2150     if (A->getOption().matches(OPT_include_pch)) {
2151       std::string OriginalFile =
2152         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
2153       if (OriginalFile.empty())
2154         continue;
2155 
2156       Opts.Includes.push_back(OriginalFile);
2157     } else
2158       Opts.Includes.push_back(A->getValue(Args));
2159   }
2160 
2161   for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2162          ie = Args.filtered_end(); it != ie; ++it) {
2163     const Arg *A = *it;
2164     Opts.ChainedIncludes.push_back(A->getValue(Args));
2165   }
2166 
2167   // Include 'altivec.h' if -faltivec option present
2168   if (Args.hasArg(OPT_faltivec))
2169     Opts.Includes.push_back("altivec.h");
2170 
2171   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2172          ie = Args.filtered_end(); it != ie; ++it) {
2173     const Arg *A = *it;
2174     std::pair<StringRef,StringRef> Split =
2175       StringRef(A->getValue(Args)).split(';');
2176 
2177     if (Split.second.empty()) {
2178       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2179       continue;
2180     }
2181 
2182     Opts.addRemappedFile(Split.first, Split.second);
2183   }
2184 
2185   if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2186     StringRef Name = A->getValue(Args);
2187     unsigned Library = llvm::StringSwitch<unsigned>(Name)
2188       .Case("libc++", ARCXX_libcxx)
2189       .Case("libstdc++", ARCXX_libstdcxx)
2190       .Case("none", ARCXX_nolib)
2191       .Default(~0U);
2192     if (Library == ~0U)
2193       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2194     else
2195       Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2196   }
2197 }
2198 
2199 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2200                                         ArgList &Args) {
2201   using namespace options;
2202   Opts.ShowCPP = !Args.hasArg(OPT_dM);
2203   Opts.ShowComments = Args.hasArg(OPT_C);
2204   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2205   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2206   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2207   Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2208 }
2209 
2210 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2211   using namespace options;
2212   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2213   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2214   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2215   Opts.Features = Args.getAllArgValues(OPT_target_feature);
2216   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2217   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2218 
2219   // Use the default target triple if unspecified.
2220   if (Opts.Triple.empty())
2221     Opts.Triple = llvm::sys::getDefaultTargetTriple();
2222 }
2223 
2224 //
2225 
2226 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2227                                         const char *const *ArgBegin,
2228                                         const char *const *ArgEnd,
2229                                         DiagnosticsEngine &Diags) {
2230   bool Success = true;
2231 
2232   // Parse the arguments.
2233   OwningPtr<OptTable> Opts(createDriverOptTable());
2234   unsigned MissingArgIndex, MissingArgCount;
2235   OwningPtr<InputArgList> Args(
2236     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2237 
2238   // Check for missing argument error.
2239   if (MissingArgCount) {
2240     Diags.Report(diag::err_drv_missing_argument)
2241       << Args->getArgString(MissingArgIndex) << MissingArgCount;
2242     Success = false;
2243   }
2244 
2245   // Issue errors on unknown arguments.
2246   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2247          ie = Args->filtered_end(); it != ie; ++it) {
2248     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2249     Success = false;
2250   }
2251 
2252   // Issue errors on arguments that are not valid for CC1.
2253   for (ArgList::iterator I = Args->begin(), E = Args->end();
2254        I != E; ++I) {
2255     if (!(*I)->getOption().isCC1Option()) {
2256       Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
2257       Success = false;
2258     }
2259   }
2260 
2261   Success = ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags) && Success;
2262   Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2263   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2264   Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
2265             && Success;
2266   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2267   // FIXME: We shouldn't have to pass the DashX option around here
2268   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2269   Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2270             && Success;
2271   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2272   if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2273     ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2274     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2275       Res.getLangOpts()->ObjCExceptions = 1;
2276   }
2277   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2278   // PCH file and find the original header name. Remove the need to do that in
2279   // ParsePreprocessorArgs and remove the FileManager
2280   // parameters from the function and the "FileManager.h" #include.
2281   FileManager FileMgr(Res.getFileSystemOpts());
2282   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2283   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2284   ParseTargetArgs(Res.getTargetOpts(), *Args);
2285 
2286   return Success;
2287 }
2288 
2289 namespace {
2290 
2291   class ModuleSignature {
2292     llvm::SmallVector<uint64_t, 16> Data;
2293     unsigned CurBit;
2294     uint64_t CurValue;
2295 
2296   public:
2297     ModuleSignature() : CurBit(0), CurValue(0) { }
2298 
2299     void add(uint64_t Value, unsigned Bits);
2300     void add(StringRef Value);
2301     void flush();
2302 
2303     llvm::APInt getAsInteger() const;
2304   };
2305 }
2306 
2307 void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2308   CurValue |= Value << CurBit;
2309   if (CurBit + NumBits < 64) {
2310     CurBit += NumBits;
2311     return;
2312   }
2313 
2314   // Add the current word.
2315   Data.push_back(CurValue);
2316 
2317   if (CurBit)
2318     CurValue = Value >> (64-CurBit);
2319   else
2320     CurValue = 0;
2321   CurBit = (CurBit+NumBits) & 63;
2322 }
2323 
2324 void ModuleSignature::flush() {
2325   if (CurBit == 0)
2326     return;
2327 
2328   Data.push_back(CurValue);
2329   CurBit = 0;
2330   CurValue = 0;
2331 }
2332 
2333 void ModuleSignature::add(StringRef Value) {
2334   for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2335     add(*I, 8);
2336 }
2337 
2338 llvm::APInt ModuleSignature::getAsInteger() const {
2339   return llvm::APInt(Data.size() * 64, Data);
2340 }
2341 
2342 std::string CompilerInvocation::getModuleHash() const {
2343   ModuleSignature Signature;
2344 
2345   // Start the signature with the compiler version.
2346   // FIXME: The full version string can be quite long.  Omit it from the
2347   // module hash for now to avoid failures where the path name becomes too
2348   // long.  An MD5 or similar checksum would work well here.
2349   // Signature.add(getClangFullRepositoryVersion());
2350 
2351   // Extend the signature with the language options
2352 #define LANGOPT(Name, Bits, Default, Description) \
2353   Signature.add(LangOpts->Name, Bits);
2354 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2355   Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2356 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
2357 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2358 #include "clang/Basic/LangOptions.def"
2359 
2360   // Extend the signature with the target triple
2361   llvm::Triple T(TargetOpts.Triple);
2362   Signature.add((unsigned)T.getArch(), 5);
2363   Signature.add((unsigned)T.getVendor(), 4);
2364   Signature.add((unsigned)T.getOS(), 5);
2365   Signature.add((unsigned)T.getEnvironment(), 4);
2366 
2367   // Extend the signature with preprocessor options.
2368   Signature.add(getPreprocessorOpts().UsePredefines, 1);
2369   Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2370 
2371   // Hash the preprocessor defines.
2372   // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2373   std::vector<StringRef> MacroDefs;
2374   for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2375             I = getPreprocessorOpts().Macros.begin(),
2376          IEnd = getPreprocessorOpts().Macros.end();
2377        I != IEnd; ++I) {
2378     if (!I->second)
2379       MacroDefs.push_back(I->first);
2380   }
2381   llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2382 
2383   unsigned PPHashResult = 0;
2384   for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2385     PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2386   Signature.add(PPHashResult, 32);
2387 
2388   // We've generated the signature. Treat it as one large APInt that we'll
2389   // encode in base-36 and return.
2390   Signature.flush();
2391   return Signature.getAsInteger().toString(36, /*Signed=*/false);
2392 }
2393