xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision bf6fac84153fc2731c2894b9c12f574c663bff55) 
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/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/PCHReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // Inlining is only derived.
149 
150   if (Opts.DataSections)
151     Res.push_back("-fdata-sections");
152   if (Opts.FunctionSections)
153     Res.push_back("-ffunction-sections");
154   if (Opts.AsmVerbose)
155     Res.push_back("-masm-verbose");
156   if (!Opts.CodeModel.empty()) {
157     Res.push_back("-mcode-model");
158     Res.push_back(Opts.CodeModel);
159   }
160   if (!Opts.CXAAtExit)
161     Res.push_back("-fno-use-cxa-atexit");
162   if (Opts.CXXCtorDtorAliases)
163     Res.push_back("-mconstructor-aliases");
164   if (!Opts.DebugPass.empty()) {
165     Res.push_back("-mdebug-pass");
166     Res.push_back(Opts.DebugPass);
167   }
168   if (Opts.DisableFPElim)
169     Res.push_back("-mdisable-fp-elim");
170   if (!Opts.FloatABI.empty()) {
171     Res.push_back("-mfloat-abi");
172     Res.push_back(Opts.FloatABI);
173   }
174   if (!Opts.LimitFloatPrecision.empty()) {
175     Res.push_back("-mlimit-float-precision");
176     Res.push_back(Opts.LimitFloatPrecision);
177   }
178   if (Opts.NoZeroInitializedInBSS)
179     Res.push_back("-mno-zero-initialized-bss");
180   switch (Opts.getObjCDispatchMethod()) {
181   case CodeGenOptions::Legacy:
182     break;
183   case CodeGenOptions::Mixed:
184     Res.push_back("-fobjc-dispatch-method=mixed");
185     break;
186   case CodeGenOptions::NonLegacy:
187     Res.push_back("-fobjc-dispatch-method=non-legacy");
188     break;
189   }
190   if (Opts.SoftFloat)
191     Res.push_back("-msoft-float");
192   if (Opts.UnwindTables)
193     Res.push_back("-munwind-tables");
194   if (Opts.RelocationModel != "pic") {
195     Res.push_back("-mrelocation-model");
196     Res.push_back(Opts.RelocationModel);
197   }
198   if (!Opts.VerifyModule)
199     Res.push_back("-disable-llvm-verifier");
200 }
201 
202 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
203                                        std::vector<std::string> &Res) {
204   if (Opts.IncludeSystemHeaders)
205     Res.push_back("-sys-header-deps");
206   if (Opts.UsePhonyTargets)
207     Res.push_back("-MP");
208   if (!Opts.OutputFile.empty()) {
209     Res.push_back("-dependency-file");
210     Res.push_back(Opts.OutputFile);
211   }
212   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
213     Res.push_back("-MT");
214     Res.push_back(Opts.Targets[i]);
215   }
216 }
217 
218 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
219                                  std::vector<std::string> &Res) {
220   if (Opts.IgnoreWarnings)
221     Res.push_back("-w");
222   if (Opts.NoRewriteMacros)
223     Res.push_back("-Wno-rewrite-macros");
224   if (Opts.Pedantic)
225     Res.push_back("-pedantic");
226   if (Opts.PedanticErrors)
227     Res.push_back("-pedantic-errors");
228   if (!Opts.ShowColumn)
229     Res.push_back("-fno-show-column");
230   if (!Opts.ShowLocation)
231     Res.push_back("-fno-show-source-location");
232   if (!Opts.ShowCarets)
233     Res.push_back("-fno-caret-diagnostics");
234   if (!Opts.ShowFixits)
235     Res.push_back("-fno-diagnostics-fixit-info");
236   if (Opts.ShowSourceRanges)
237     Res.push_back("-fdiagnostics-print-source-range-info");
238   if (Opts.ShowColors)
239     Res.push_back("-fcolor-diagnostics");
240   if (Opts.VerifyDiagnostics)
241     Res.push_back("-verify");
242   if (Opts.BinaryOutput)
243     Res.push_back("-fdiagnostics-binary");
244   if (Opts.ShowOptionNames)
245     Res.push_back("-fdiagnostics-show-option");
246   if (Opts.ShowCategories == 1)
247     Res.push_back("-fdiagnostics-show-category=id");
248   else if (Opts.ShowCategories == 2)
249     Res.push_back("-fdiagnostics-show-category=name");
250   if (Opts.ErrorLimit) {
251     Res.push_back("-ferror-limit");
252     Res.push_back(llvm::utostr(Opts.ErrorLimit));
253   }
254   if (Opts.MacroBacktraceLimit
255                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
256     Res.push_back("-fmacro-backtrace-limit");
257     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
258   }
259   if (Opts.TemplateBacktraceLimit
260                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
261     Res.push_back("-ftemplate-backtrace-limit");
262     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
263   }
264 
265   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
266     Res.push_back("-ftabstop");
267     Res.push_back(llvm::utostr(Opts.TabStop));
268   }
269   if (Opts.MessageLength) {
270     Res.push_back("-fmessage-length");
271     Res.push_back(llvm::utostr(Opts.MessageLength));
272   }
273   if (!Opts.DumpBuildInformation.empty()) {
274     Res.push_back("-dump-build-information");
275     Res.push_back(Opts.DumpBuildInformation);
276   }
277   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
278     Res.push_back("-W" + Opts.Warnings[i]);
279 }
280 
281 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
282   switch (Kind) {
283   case FrontendOptions::IK_None:              break;
284   case FrontendOptions::IK_AST:               return "ast";
285   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
286   case FrontendOptions::IK_C:                 return "c";
287   case FrontendOptions::IK_CXX:               return "c++";
288   case FrontendOptions::IK_ObjC:              return "objective-c";
289   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
290   case FrontendOptions::IK_OpenCL:            return "cl";
291   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
292   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
293   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
294   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
295   }
296 
297   llvm_unreachable("Unexpected language kind!");
298   return 0;
299 }
300 
301 static const char *getActionName(frontend::ActionKind Kind) {
302   switch (Kind) {
303   case frontend::PluginAction:
304   case frontend::InheritanceView:
305     llvm_unreachable("Invalid kind!");
306 
307   case frontend::ASTDump:                return "-ast-dump";
308   case frontend::ASTPrint:               return "-ast-print";
309   case frontend::ASTPrintXML:            return "-ast-print-xml";
310   case frontend::ASTView:                return "-ast-view";
311   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
312   case frontend::DumpTokens:             return "-dump-tokens";
313   case frontend::EmitAssembly:           return "-S";
314   case frontend::EmitBC:                 return "-emit-llvm-bc";
315   case frontend::EmitHTML:               return "-emit-html";
316   case frontend::EmitLLVM:               return "-emit-llvm";
317   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
318   case frontend::EmitObj:                return "-emit-obj";
319   case frontend::FixIt:                  return "-fixit";
320   case frontend::GeneratePCH:            return "-emit-pch";
321   case frontend::GeneratePTH:            return "-emit-pth";
322   case frontend::InitOnly:               return "-init-only";
323   case frontend::ParseNoop:              return "-parse-noop";
324   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
325   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
326   case frontend::PrintDeclContext:       return "-print-decl-contexts";
327   case frontend::PrintPreprocessedInput: return "-E";
328   case frontend::RewriteMacros:          return "-rewrite-macros";
329   case frontend::RewriteObjC:            return "-rewrite-objc";
330   case frontend::RewriteTest:            return "-rewrite-test";
331   case frontend::RunAnalysis:            return "-analyze";
332   case frontend::RunPreprocessorOnly:    return "-Eonly";
333   }
334 
335   llvm_unreachable("Unexpected language kind!");
336   return 0;
337 }
338 
339 static void FrontendOptsToArgs(const FrontendOptions &Opts,
340                                std::vector<std::string> &Res) {
341   if (!Opts.DebugCodeCompletionPrinter)
342     Res.push_back("-no-code-completion-debug-printer");
343   if (Opts.DisableFree)
344     Res.push_back("-disable-free");
345   if (Opts.RelocatablePCH)
346     Res.push_back("-relocatable-pch");
347   if (Opts.ShowHelp)
348     Res.push_back("-help");
349   if (Opts.ShowMacrosInCodeCompletion)
350     Res.push_back("-code-completion-macros");
351   if (Opts.ShowStats)
352     Res.push_back("-print-stats");
353   if (Opts.ShowTimers)
354     Res.push_back("-ftime-report");
355   if (Opts.ShowVersion)
356     Res.push_back("-version");
357 
358   bool NeedLang = false;
359   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
360     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
361         Opts.Inputs[i].first)
362       NeedLang = true;
363   if (NeedLang) {
364     Res.push_back("-x");
365     Res.push_back(getInputKindName(Opts.Inputs[0].first));
366   }
367   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
368     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
369            "Unable to represent this input vector!");
370     Res.push_back(Opts.Inputs[i].second);
371   }
372 
373   if (!Opts.OutputFile.empty()) {
374     Res.push_back("-o");
375     Res.push_back(Opts.OutputFile);
376   }
377   if (!Opts.ViewClassInheritance.empty()) {
378     Res.push_back("-cxx-inheritance-view");
379     Res.push_back(Opts.ViewClassInheritance);
380   }
381   if (!Opts.CodeCompletionAt.FileName.empty()) {
382     Res.push_back("-code-completion-at");
383     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
384                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
385                   llvm::utostr(Opts.CodeCompletionAt.Column));
386   }
387   if (Opts.ProgramAction != frontend::InheritanceView &&
388       Opts.ProgramAction != frontend::PluginAction)
389     Res.push_back(getActionName(Opts.ProgramAction));
390   if (!Opts.ActionName.empty()) {
391     Res.push_back("-plugin");
392     Res.push_back(Opts.ActionName);
393   }
394   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
395     Res.push_back("-load");
396     Res.push_back(Opts.Plugins[i]);
397   }
398   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
399     Res.push_back("-ast-merge");
400     Res.push_back(Opts.ASTMergeFiles[i]);
401   }
402   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
403     Res.push_back("-mllvm");
404     Res.push_back(Opts.LLVMArgs[i]);
405   }
406 }
407 
408 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
409                                    std::vector<std::string> &Res) {
410   if (Opts.Sysroot != "/") {
411     Res.push_back("-isysroot");
412     Res.push_back(Opts.Sysroot);
413   }
414 
415   /// User specified include entries.
416   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
417     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
418     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
419       llvm::report_fatal_error("Invalid option set!");
420     if (E.IsUserSupplied) {
421       if (E.Group == frontend::After) {
422         Res.push_back("-idirafter");
423       } else if (E.Group == frontend::Quoted) {
424         Res.push_back("-iquote");
425       } else if (E.Group == frontend::System) {
426         Res.push_back("-isystem");
427       } else {
428         assert(E.Group == frontend::Angled && "Invalid group!");
429         Res.push_back(E.IsFramework ? "-F" : "-I");
430       }
431     } else {
432       if (E.Group != frontend::Angled && E.Group != frontend::System)
433         llvm::report_fatal_error("Invalid option set!");
434       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
435                     "-iwithprefix");
436     }
437     Res.push_back(E.Path);
438   }
439 
440   if (!Opts.EnvIncPath.empty()) {
441     // FIXME: Provide an option for this, and move env detection to driver.
442     llvm::report_fatal_error("Not yet implemented!");
443   }
444   if (!Opts.CEnvIncPath.empty()) {
445     // FIXME: Provide an option for this, and move env detection to driver.
446     llvm::report_fatal_error("Not yet implemented!");
447   }
448   if (!Opts.ObjCEnvIncPath.empty()) {
449     // FIXME: Provide an option for this, and move env detection to driver.
450     llvm::report_fatal_error("Not yet implemented!");
451   }
452   if (!Opts.CXXEnvIncPath.empty()) {
453     // FIXME: Provide an option for this, and move env detection to driver.
454     llvm::report_fatal_error("Not yet implemented!");
455   }
456   if (!Opts.ObjCXXEnvIncPath.empty()) {
457     // FIXME: Provide an option for this, and move env detection to driver.
458     llvm::report_fatal_error("Not yet implemented!");
459   }
460   if (!Opts.ResourceDir.empty()) {
461     Res.push_back("-resource-dir");
462     Res.push_back(Opts.ResourceDir);
463   }
464   if (!Opts.UseStandardIncludes)
465     Res.push_back("-nostdinc");
466   if (!Opts.UseStandardCXXIncludes)
467     Res.push_back("-nostdinc++");
468   if (Opts.Verbose)
469     Res.push_back("-v");
470 }
471 
472 static void LangOptsToArgs(const LangOptions &Opts,
473                            std::vector<std::string> &Res) {
474   LangOptions DefaultLangOpts;
475 
476   // FIXME: Need to set -std to get all the implicit options.
477 
478   // FIXME: We want to only pass options relative to the defaults, which
479   // requires constructing a target. :(
480   //
481   // It would be better to push the all target specific choices into the driver,
482   // so that everything below that was more uniform.
483 
484   if (Opts.Trigraphs)
485     Res.push_back("-trigraphs");
486   // Implicit based on the input kind:
487   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
488   // Implicit based on the input language standard:
489   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
490   if (Opts.DollarIdents)
491     Res.push_back("-fdollars-in-identifiers");
492   if (Opts.GNUMode && !Opts.GNUKeywords)
493     Res.push_back("-fno-gnu-keywords");
494   if (!Opts.GNUMode && Opts.GNUKeywords)
495     Res.push_back("-fgnu-keywords");
496   if (Opts.Microsoft)
497     Res.push_back("-fms-extensions");
498   if (Opts.ObjCNonFragileABI)
499     Res.push_back("-fobjc-nonfragile-abi");
500   if (Opts.ObjCNonFragileABI2)
501     Res.push_back("-fobjc-nonfragile-abi2");
502   // NoInline is implicit.
503   if (!Opts.CXXOperatorNames)
504     Res.push_back("-fno-operator-names");
505   if (Opts.PascalStrings)
506     Res.push_back("-fpascal-strings");
507   if (Opts.CatchUndefined)
508     Res.push_back("-fcatch-undefined-behavior");
509   if (Opts.WritableStrings)
510     Res.push_back("-fwritable-strings");
511   if (Opts.ConstStrings)
512     Res.push_back("-Wwrite-strings");
513   if (!Opts.LaxVectorConversions)
514     Res.push_back("-fno-lax-vector-conversions");
515   if (Opts.AltiVec)
516     Res.push_back("-faltivec");
517   if (Opts.Exceptions)
518     Res.push_back("-fexceptions");
519   if (Opts.SjLjExceptions)
520     Res.push_back("-fsjlj-exceptions");
521   if (!Opts.RTTI)
522     Res.push_back("-fno-rtti");
523   if (!Opts.NeXTRuntime)
524     Res.push_back("-fgnu-runtime");
525   if (Opts.Freestanding)
526     Res.push_back("-ffreestanding");
527   if (Opts.NoBuiltin)
528     Res.push_back("-fno-builtin");
529   if (!Opts.AssumeSaneOperatorNew)
530     Res.push_back("-fno-assume-sane-operator-new");
531   if (!Opts.ThreadsafeStatics)
532     Res.push_back("-fno-threadsafe-statics");
533   if (Opts.POSIXThreads)
534     Res.push_back("-pthread");
535   if (Opts.Blocks)
536     Res.push_back("-fblocks");
537   if (Opts.EmitAllDecls)
538     Res.push_back("-femit-all-decls");
539   if (Opts.MathErrno)
540     Res.push_back("-fmath-errno");
541   if (Opts.OverflowChecking)
542     Res.push_back("-ftrapv");
543   if (Opts.HeinousExtensions)
544     Res.push_back("-fheinous-gnu-extensions");
545   // Optimize is implicit.
546   // OptimizeSize is implicit.
547   if (Opts.Static)
548     Res.push_back("-static-define");
549   if (Opts.DumpRecordLayouts)
550     Res.push_back("-fdump-record-layouts");
551   if (Opts.DumpVTableLayouts)
552     Res.push_back("-fdump-vtable-layouts");
553   if (Opts.NoBitFieldTypeAlign)
554     Res.push_back("-fno-bitfield-type-alignment");
555   if (Opts.SjLjExceptions)
556     Res.push_back("-fsjlj-exceptions");
557   if (Opts.PICLevel) {
558     Res.push_back("-pic-level");
559     Res.push_back(llvm::utostr(Opts.PICLevel));
560   }
561   if (Opts.ObjCGCBitmapPrint)
562     Res.push_back("-print-ivar-layout");
563   if (Opts.NoConstantCFStrings)
564     Res.push_back("-fno-constant-cfstrings");
565   if (!Opts.AccessControl)
566     Res.push_back("-fno-access-control");
567   if (!Opts.CharIsSigned)
568     Res.push_back("-fno-signed-char");
569   if (Opts.ShortWChar)
570     Res.push_back("-fshort-wchar");
571   if (!Opts.ElideConstructors)
572     Res.push_back("-fno-elide-constructors");
573   if (Opts.getGCMode() != LangOptions::NonGC) {
574     if (Opts.getGCMode() == LangOptions::HybridGC) {
575       Res.push_back("-fobjc-gc");
576     } else {
577       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
578       Res.push_back("-fobjc-gc-only");
579     }
580   }
581   if (Opts.getVisibilityMode() != LangOptions::Default) {
582     Res.push_back("-fvisibility");
583     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
584       Res.push_back("hidden");
585     } else {
586       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
587              "Invalid visibility!");
588       Res.push_back("protected");
589     }
590   }
591   if (Opts.getStackProtectorMode() != 0) {
592     Res.push_back("-stack-protector");
593     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
594   }
595   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
596     Res.push_back("-ftemplate-depth");
597     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
598   }
599   if (!Opts.ObjCConstantStringClass.empty()) {
600     Res.push_back("-fconstant-string-class");
601     Res.push_back(Opts.ObjCConstantStringClass);
602   }
603 }
604 
605 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
606                                    std::vector<std::string> &Res) {
607   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
608     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
609                   Opts.Macros[i].first);
610   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
611     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
612     Res.push_back("-include");
613     Res.push_back(Opts.Includes[i]);
614   }
615   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
616     Res.push_back("-imacros");
617     Res.push_back(Opts.MacroIncludes[i]);
618   }
619   if (!Opts.UsePredefines)
620     Res.push_back("-undef");
621   if (Opts.DetailedRecord)
622     Res.push_back("-detailed-preprocessing-record");
623   if (!Opts.ImplicitPCHInclude.empty()) {
624     Res.push_back("-include-pch");
625     Res.push_back(Opts.ImplicitPCHInclude);
626   }
627   if (!Opts.ImplicitPTHInclude.empty()) {
628     Res.push_back("-include-pth");
629     Res.push_back(Opts.ImplicitPTHInclude);
630   }
631   if (!Opts.TokenCache.empty()) {
632     if (Opts.ImplicitPTHInclude.empty()) {
633       Res.push_back("-token-cache");
634       Res.push_back(Opts.TokenCache);
635     } else
636       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
637              "Unsupported option combination!");
638   }
639   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
640     Res.push_back("-remap-file");
641     Res.push_back(Opts.RemappedFiles[i].first + ";" +
642                   Opts.RemappedFiles[i].second);
643   }
644 }
645 
646 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
647                                          std::vector<std::string> &Res) {
648   if (!Opts.ShowCPP && !Opts.ShowMacros)
649     llvm::report_fatal_error("Invalid option combination!");
650 
651   if (Opts.ShowCPP && Opts.ShowMacros)
652     Res.push_back("-dD");
653   else if (!Opts.ShowCPP && Opts.ShowMacros)
654     Res.push_back("-dM");
655 
656   if (!Opts.ShowLineMarkers)
657     Res.push_back("-P");
658   if (Opts.ShowComments)
659     Res.push_back("-C");
660   if (Opts.ShowMacroComments)
661     Res.push_back("-CC");
662 }
663 
664 static void TargetOptsToArgs(const TargetOptions &Opts,
665                              std::vector<std::string> &Res) {
666   Res.push_back("-triple");
667   Res.push_back(Opts.Triple);
668   if (!Opts.CPU.empty()) {
669     Res.push_back("-target-cpu");
670     Res.push_back(Opts.CPU);
671   }
672   if (!Opts.ABI.empty()) {
673     Res.push_back("-target-abi");
674     Res.push_back(Opts.ABI);
675   }
676   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
677     Res.push_back("-target-feature");
678     Res.push_back(Opts.Features[i]);
679   }
680 }
681 
682 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
683   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
684   CodeGenOptsToArgs(getCodeGenOpts(), Res);
685   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
686   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
687   FrontendOptsToArgs(getFrontendOpts(), Res);
688   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
689   LangOptsToArgs(getLangOpts(), Res);
690   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
691   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
692   TargetOptsToArgs(getTargetOpts(), Res);
693 }
694 
695 //===----------------------------------------------------------------------===//
696 // Deserialization (to args)
697 //===----------------------------------------------------------------------===//
698 
699 using namespace clang::driver;
700 using namespace clang::driver::cc1options;
701 
702 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
703                                        llvm::StringRef Default = "") {
704   if (Arg *A = Args.getLastArg(ID))
705     return A->getValue(Args);
706   return Default;
707 }
708 
709 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
710                               int Default, Diagnostic &Diags) {
711   Arg *A = Args.getLastArg(ID);
712   if (!A)
713     return Default;
714 
715   int Res = Default;
716   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
717     Diags.Report(diag::err_drv_invalid_int_value)
718         << A->getAsString(Args) << A->getValue(Args);
719 
720   return Res;
721 }
722 
723 static std::vector<std::string>
724 getAllArgValues(ArgList &Args, cc1options::ID ID) {
725   llvm::SmallVector<const char *, 16> Values;
726   Args.AddAllArgValues(Values, ID);
727   return std::vector<std::string>(Values.begin(), Values.end());
728 }
729 
730 //
731 
732 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
733                               Diagnostic &Diags) {
734   using namespace cc1options;
735 
736   Opts.AnalysisList.clear();
737 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
738   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
739 #include "clang/Frontend/Analyses.def"
740 
741   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
742     llvm::StringRef Name = A->getValue(Args);
743     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
744 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
745       .Case(CMDFLAG, NAME##Model)
746 #include "clang/Frontend/Analyses.def"
747       .Default(NumStores);
748     // FIXME: Error handling.
749     if (Value == NumStores)
750       Diags.Report(diag::err_drv_invalid_value)
751         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
752     else
753       Opts.AnalysisStoreOpt = Value;
754   }
755 
756   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
757     llvm::StringRef Name = A->getValue(Args);
758     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
759 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
760       .Case(CMDFLAG, NAME##Model)
761 #include "clang/Frontend/Analyses.def"
762       .Default(NumConstraints);
763     // FIXME: Error handling.
764     if (Value == NumConstraints)
765       Diags.Report(diag::err_drv_invalid_value)
766         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
767     else
768       Opts.AnalysisConstraintsOpt = Value;
769   }
770 
771   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
772     llvm::StringRef Name = A->getValue(Args);
773     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
774 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
775       .Case(CMDFLAG, PD_##NAME)
776 #include "clang/Frontend/Analyses.def"
777       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
778     // FIXME: Error handling.
779     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
780       Diags.Report(diag::err_drv_invalid_value)
781         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
782     else
783       Opts.AnalysisDiagOpt = Value;
784   }
785 
786   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
787   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
788   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
789   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
790   Opts.AnalyzeNestedBlocks =
791     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
792   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
793   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
794   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
795   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
796   Opts.EnableExperimentalInternalChecks =
797     Args.hasArg(OPT_analyzer_experimental_internal_checks);
798   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
799   Opts.MaxNodes = getLastArgIntValue(Args, OPT_analyzer_max_nodes,150000,Diags);
800 }
801 
802 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
803                              Diagnostic &Diags) {
804   using namespace cc1options;
805   // -Os implies -O2
806   if (Args.hasArg(OPT_Os))
807     Opts.OptimizationLevel = 2;
808   else {
809     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
810     if (Opts.OptimizationLevel > 3) {
811       Diags.Report(diag::err_drv_invalid_value)
812         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
813       Opts.OptimizationLevel = 3;
814     }
815   }
816 
817   // We must always run at least the always inlining pass.
818   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
819     : CodeGenOptions::OnlyAlwaysInlining;
820 
821   Opts.DebugInfo = Args.hasArg(OPT_g);
822   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
823   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
824   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
825   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
826   Opts.NoCommon = Args.hasArg(OPT_fno_common);
827   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
828   Opts.OptimizeSize = Args.hasArg(OPT_Os);
829   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
830 
831   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
832   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
833   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
834   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
835   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
836   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
837   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
838   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
839   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
840   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
841   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
842   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
843 
844   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
845   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
846 
847   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
848   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
849 
850   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
851     llvm::StringRef Name = A->getValue(Args);
852     unsigned Method = llvm::StringSwitch<unsigned>(Name)
853       .Case("legacy", CodeGenOptions::Legacy)
854       .Case("non-legacy", CodeGenOptions::NonLegacy)
855       .Case("mixed", CodeGenOptions::Mixed)
856       .Default(~0U);
857     if (Method == ~0U)
858       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
859     else
860       Opts.ObjCDispatchMethod = Method;
861   }
862 }
863 
864 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
865                                       ArgList &Args) {
866   using namespace cc1options;
867   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
868   Opts.Targets = getAllArgValues(Args, OPT_MT);
869   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
870   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
871 }
872 
873 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
874                                 Diagnostic &Diags) {
875   using namespace cc1options;
876   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
877   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
878   Opts.Pedantic = Args.hasArg(OPT_pedantic);
879   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
880   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
881   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
882   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
883   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
884   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
885   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
886 
887   llvm::StringRef ShowCategory =
888     getLastArgValue(Args, OPT_fdiagnostics_show_category, "none");
889   if (ShowCategory == "none")
890     Opts.ShowCategories = 0;
891   else if (ShowCategory == "id")
892     Opts.ShowCategories = 1;
893   else if (ShowCategory == "name")
894     Opts.ShowCategories = 2;
895   else
896     Diags.Report(diag::err_drv_invalid_value)
897       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
898       << ShowCategory;
899 
900   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
901   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
902   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
903   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
904   Opts.MacroBacktraceLimit
905     = getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
906                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
907   Opts.TemplateBacktraceLimit
908     = getLastArgIntValue(Args, OPT_ftemplate_backtrace_limit,
909                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
910                          Diags);
911   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
912                                     DiagnosticOptions::DefaultTabStop, Diags);
913   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
914     Diags.Report(diag::warn_ignoring_ftabstop_value)
915       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
916     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
917   }
918   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
919   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
920   Opts.Warnings = getAllArgValues(Args, OPT_W);
921 }
922 
923 static FrontendOptions::InputKind
924 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
925   using namespace cc1options;
926   Opts.ProgramAction = frontend::ParseSyntaxOnly;
927   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
928     switch (A->getOption().getID()) {
929     default:
930       assert(0 && "Invalid option in group!");
931     case OPT_ast_dump:
932       Opts.ProgramAction = frontend::ASTDump; break;
933     case OPT_ast_print:
934       Opts.ProgramAction = frontend::ASTPrint; break;
935     case OPT_ast_print_xml:
936       Opts.ProgramAction = frontend::ASTPrintXML; break;
937     case OPT_ast_view:
938       Opts.ProgramAction = frontend::ASTView; break;
939     case OPT_dump_raw_tokens:
940       Opts.ProgramAction = frontend::DumpRawTokens; break;
941     case OPT_dump_tokens:
942       Opts.ProgramAction = frontend::DumpTokens; break;
943     case OPT_S:
944       Opts.ProgramAction = frontend::EmitAssembly; break;
945     case OPT_emit_llvm_bc:
946       Opts.ProgramAction = frontend::EmitBC; break;
947     case OPT_emit_html:
948       Opts.ProgramAction = frontend::EmitHTML; break;
949     case OPT_emit_llvm:
950       Opts.ProgramAction = frontend::EmitLLVM; break;
951     case OPT_emit_llvm_only:
952       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
953     case OPT_emit_obj:
954       Opts.ProgramAction = frontend::EmitObj; break;
955     case OPT_fixit_EQ:
956       Opts.FixItSuffix = A->getValue(Args);
957       // fall-through!
958     case OPT_fixit:
959       Opts.ProgramAction = frontend::FixIt; break;
960     case OPT_emit_pch:
961       Opts.ProgramAction = frontend::GeneratePCH; break;
962     case OPT_emit_pth:
963       Opts.ProgramAction = frontend::GeneratePTH; break;
964     case OPT_init_only:
965       Opts.ProgramAction = frontend::InitOnly; break;
966     case OPT_parse_noop:
967       Opts.ProgramAction = frontend::ParseNoop; break;
968     case OPT_parse_print_callbacks:
969       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
970     case OPT_fsyntax_only:
971       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
972     case OPT_print_decl_contexts:
973       Opts.ProgramAction = frontend::PrintDeclContext; break;
974     case OPT_E:
975       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
976     case OPT_rewrite_macros:
977       Opts.ProgramAction = frontend::RewriteMacros; break;
978     case OPT_rewrite_objc:
979       Opts.ProgramAction = frontend::RewriteObjC; break;
980     case OPT_rewrite_test:
981       Opts.ProgramAction = frontend::RewriteTest; break;
982     case OPT_analyze:
983       Opts.ProgramAction = frontend::RunAnalysis; break;
984     case OPT_Eonly:
985       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
986     }
987   }
988   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
989     Opts.ProgramAction = frontend::PluginAction;
990     Opts.ActionName = A->getValue(Args);
991   }
992 
993   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
994     Opts.CodeCompletionAt =
995       ParsedSourceLocation::FromString(A->getValue(Args));
996     if (Opts.CodeCompletionAt.FileName.empty())
997       Diags.Report(diag::err_drv_invalid_value)
998         << A->getAsString(Args) << A->getValue(Args);
999   }
1000   Opts.DebugCodeCompletionPrinter =
1001     !Args.hasArg(OPT_no_code_completion_debug_printer);
1002   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1003 
1004   Opts.OutputFile = getLastArgValue(Args, OPT_o);
1005   Opts.Plugins = getAllArgValues(Args, OPT_load);
1006   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1007   Opts.ShowHelp = Args.hasArg(OPT_help);
1008   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1009   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1010   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1011   Opts.ShowVersion = Args.hasArg(OPT_version);
1012   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
1013   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
1014   Opts.LLVMArgs = getAllArgValues(Args, OPT_mllvm);
1015 
1016   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
1017   if (const Arg *A = Args.getLastArg(OPT_x)) {
1018     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
1019       .Case("c", FrontendOptions::IK_C)
1020       .Case("cl", FrontendOptions::IK_OpenCL)
1021       .Case("c", FrontendOptions::IK_C)
1022       .Case("cl", FrontendOptions::IK_OpenCL)
1023       .Case("c++", FrontendOptions::IK_CXX)
1024       .Case("objective-c", FrontendOptions::IK_ObjC)
1025       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
1026       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
1027       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
1028       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
1029       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
1030       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
1031       .Case("c-header", FrontendOptions::IK_C)
1032       .Case("objective-c-header", FrontendOptions::IK_ObjC)
1033       .Case("c++-header", FrontendOptions::IK_CXX)
1034       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
1035       .Case("ast", FrontendOptions::IK_AST)
1036       .Default(FrontendOptions::IK_None);
1037     if (DashX == FrontendOptions::IK_None)
1038       Diags.Report(diag::err_drv_invalid_value)
1039         << A->getAsString(Args) << A->getValue(Args);
1040   }
1041 
1042   // '-' is the default input if none is given.
1043   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
1044   Opts.Inputs.clear();
1045   if (Inputs.empty())
1046     Inputs.push_back("-");
1047   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1048     FrontendOptions::InputKind IK = DashX;
1049     if (IK == FrontendOptions::IK_None) {
1050       IK = FrontendOptions::getInputKindForExtension(
1051         llvm::StringRef(Inputs[i]).rsplit('.').second);
1052       // FIXME: Remove this hack.
1053       if (i == 0)
1054         DashX = IK;
1055     }
1056     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1057   }
1058 
1059   return DashX;
1060 }
1061 
1062 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1063                                                  void *MainAddr) {
1064   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1065 
1066   if (!P.isEmpty()) {
1067     P.eraseComponent();  // Remove /clang from foo/bin/clang
1068     P.eraseComponent();  // Remove /bin   from foo/bin
1069 
1070     // Get foo/lib/clang/<version>/include
1071     P.appendComponent("lib");
1072     P.appendComponent("clang");
1073     P.appendComponent(CLANG_VERSION_STRING);
1074   }
1075 
1076   return P.str();
1077 }
1078 
1079 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1080   using namespace cc1options;
1081   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1082   Opts.Verbose = Args.hasArg(OPT_v);
1083   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1084   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1085   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1086   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1087 
1088   // Add -I... and -F... options in order.
1089   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1090          ie = Args.filtered_end(); it != ie; ++it)
1091     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1092                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1093 
1094   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1095   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1096   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1097                                              OPT_iwithprefixbefore),
1098          ie = Args.filtered_end(); it != ie; ++it) {
1099     if (it->getOption().matches(OPT_iprefix))
1100       Prefix = it->getValue(Args);
1101     else if (it->getOption().matches(OPT_iwithprefix))
1102       Opts.AddPath(Prefix.str() + it->getValue(Args),
1103                    frontend::System, false, false);
1104     else
1105       Opts.AddPath(Prefix.str() + it->getValue(Args),
1106                    frontend::Angled, false, false);
1107   }
1108 
1109   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1110          ie = Args.filtered_end(); it != ie; ++it)
1111     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1112   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1113          ie = Args.filtered_end(); it != ie; ++it)
1114     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1115   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1116          ie = Args.filtered_end(); it != ie; ++it)
1117     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1118 
1119   // FIXME: Need options for the various environment variables!
1120 }
1121 
1122 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1123                           FrontendOptions::InputKind IK,
1124                           Diagnostic &Diags) {
1125   // FIXME: Cleanup per-file based stuff.
1126 
1127   // Set some properties which depend soley on the input kind; it would be nice
1128   // to move these to the language standard, and have the driver resolve the
1129   // input kind + language standard.
1130   if (IK == FrontendOptions::IK_Asm) {
1131     Opts.AsmPreprocessor = 1;
1132   } else if (IK == FrontendOptions::IK_ObjC ||
1133              IK == FrontendOptions::IK_ObjCXX ||
1134              IK == FrontendOptions::IK_PreprocessedObjC ||
1135              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1136     Opts.ObjC1 = Opts.ObjC2 = 1;
1137   }
1138 
1139   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1140   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1141     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1142 #define LANGSTANDARD(id, name, desc, features) \
1143       .Case(name, LangStandard::lang_##id)
1144 #include "clang/Frontend/LangStandards.def"
1145       .Default(LangStandard::lang_unspecified);
1146     if (LangStd == LangStandard::lang_unspecified)
1147       Diags.Report(diag::err_drv_invalid_value)
1148         << A->getAsString(Args) << A->getValue(Args);
1149   }
1150 
1151   if (LangStd == LangStandard::lang_unspecified) {
1152     // Based on the base language, pick one.
1153     switch (IK) {
1154     case FrontendOptions::IK_None:
1155     case FrontendOptions::IK_AST:
1156       assert(0 && "Invalid input kind!");
1157     case FrontendOptions::IK_OpenCL:
1158       LangStd = LangStandard::lang_opencl;
1159       break;
1160     case FrontendOptions::IK_Asm:
1161     case FrontendOptions::IK_C:
1162     case FrontendOptions::IK_PreprocessedC:
1163     case FrontendOptions::IK_ObjC:
1164     case FrontendOptions::IK_PreprocessedObjC:
1165       LangStd = LangStandard::lang_gnu99;
1166       break;
1167     case FrontendOptions::IK_CXX:
1168     case FrontendOptions::IK_PreprocessedCXX:
1169     case FrontendOptions::IK_ObjCXX:
1170     case FrontendOptions::IK_PreprocessedObjCXX:
1171       LangStd = LangStandard::lang_gnucxx98;
1172       break;
1173     }
1174   }
1175 
1176   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1177   Opts.BCPLComment = Std.hasBCPLComments();
1178   Opts.C99 = Std.isC99();
1179   Opts.CPlusPlus = Std.isCPlusPlus();
1180   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1181   Opts.Digraphs = Std.hasDigraphs();
1182   Opts.GNUMode = Std.isGNUMode();
1183   Opts.GNUInline = !Std.isC99();
1184   Opts.HexFloats = Std.hasHexFloats();
1185   Opts.ImplicitInt = Std.hasImplicitInt();
1186 
1187   // OpenCL has some additional defaults.
1188   if (LangStd == LangStandard::lang_opencl) {
1189     Opts.OpenCL = 1;
1190     Opts.AltiVec = 1;
1191     Opts.CXXOperatorNames = 1;
1192     Opts.LaxVectorConversions = 1;
1193   }
1194 
1195   // OpenCL and C++ both have bool, true, false keywords.
1196   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1197 
1198   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1199   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1200   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1201   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1202   // name, as it doesn't seem a useful distinction.
1203   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1204                                   Opts.GNUMode);
1205 
1206   if (Opts.CPlusPlus)
1207     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1208 
1209   if (Args.hasArg(OPT_fobjc_gc_only))
1210     Opts.setGCMode(LangOptions::GCOnly);
1211   else if (Args.hasArg(OPT_fobjc_gc))
1212     Opts.setGCMode(LangOptions::HybridGC);
1213 
1214   if (Args.hasArg(OPT_print_ivar_layout))
1215     Opts.ObjCGCBitmapPrint = 1;
1216   if (Args.hasArg(OPT_fno_constant_cfstrings))
1217     Opts.NoConstantCFStrings = 1;
1218 
1219   if (Args.hasArg(OPT_faltivec))
1220     Opts.AltiVec = 1;
1221 
1222   if (Args.hasArg(OPT_pthread))
1223     Opts.POSIXThreads = 1;
1224 
1225   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1226                                         "default");
1227   if (Vis == "default")
1228     Opts.setVisibilityMode(LangOptions::Default);
1229   else if (Vis == "hidden")
1230     Opts.setVisibilityMode(LangOptions::Hidden);
1231   else if (Vis == "protected")
1232     Opts.setVisibilityMode(LangOptions::Protected);
1233   else
1234     Diags.Report(diag::err_drv_invalid_value)
1235       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1236 
1237   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1238 
1239   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1240   // is specified, or -std is set to a conforming mode.
1241   Opts.Trigraphs = !Opts.GNUMode;
1242   if (Args.hasArg(OPT_trigraphs))
1243     Opts.Trigraphs = 1;
1244 
1245   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1246                                    OPT_fno_dollars_in_identifiers,
1247                                    !Opts.AsmPreprocessor);
1248   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1249   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1250   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1251   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1252   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1253     Opts.LaxVectorConversions = 0;
1254   if (Args.hasArg(OPT_fno_threadsafe_statics))
1255     Opts.ThreadsafeStatics = 0;
1256   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1257   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1258   Opts.Blocks = Args.hasArg(OPT_fblocks);
1259   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1260   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1261   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1262   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1263   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1264   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1265   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1266   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1267   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1268   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 1024,
1269                                                Diags);
1270   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1271   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1272                                                  OPT_fconstant_string_class);
1273   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1274   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1275   if (Opts.ObjCNonFragileABI2)
1276     Opts.ObjCNonFragileABI = true;
1277   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1278   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1279   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1280   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1281   Opts.Static = Args.hasArg(OPT_static_define);
1282   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1283   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1284   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1285   Opts.OptimizeSize = 0;
1286 
1287   // FIXME: Eliminate this dependency.
1288   unsigned Opt =
1289     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1290   Opts.Optimize = Opt != 0;
1291 
1292   // This is the __NO_INLINE__ define, which just depends on things like the
1293   // optimization level and -fno-inline, not actually whether the backend has
1294   // inlining enabled.
1295   //
1296   // FIXME: This is affected by other options (-fno-inline).
1297   Opts.NoInline = !Opt;
1298 
1299   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1300   switch (SSP) {
1301   default:
1302     Diags.Report(diag::err_drv_invalid_value)
1303       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1304     break;
1305   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1306   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1307   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1308   }
1309 }
1310 
1311 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1312                                   Diagnostic &Diags) {
1313   using namespace cc1options;
1314   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1315   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1316   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1317       Opts.TokenCache = A->getValue(Args);
1318   else
1319     Opts.TokenCache = Opts.ImplicitPTHInclude;
1320   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1321   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1322   // Add macros from the command line.
1323   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1324          ie = Args.filtered_end(); it != ie; ++it) {
1325     if (it->getOption().matches(OPT_D))
1326       Opts.addMacroDef(it->getValue(Args));
1327     else
1328       Opts.addMacroUndef(it->getValue(Args));
1329   }
1330 
1331   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1332 
1333   // Add the ordered list of -includes.
1334   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1335                                              OPT_include_pth),
1336          ie = Args.filtered_end(); it != ie; ++it) {
1337     // PCH is handled specially, we need to extra the original include path.
1338     if (it->getOption().matches(OPT_include_pch)) {
1339       std::string OriginalFile =
1340         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1341       if (OriginalFile.empty())
1342         continue;
1343 
1344       Opts.Includes.push_back(OriginalFile);
1345     } else
1346       Opts.Includes.push_back(it->getValue(Args));
1347   }
1348 
1349   // Include 'altivec.h' if -faltivec option present
1350   if (Args.hasArg(OPT_faltivec))
1351     Opts.Includes.push_back("altivec.h");
1352 
1353   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1354          ie = Args.filtered_end(); it != ie; ++it) {
1355     std::pair<llvm::StringRef,llvm::StringRef> Split =
1356       llvm::StringRef(it->getValue(Args)).split(';');
1357 
1358     if (Split.second.empty()) {
1359       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1360       continue;
1361     }
1362 
1363     Opts.addRemappedFile(Split.first, Split.second);
1364   }
1365 }
1366 
1367 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1368                                         ArgList &Args) {
1369   using namespace cc1options;
1370   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1371   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1372   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1373   Opts.ShowComments = Args.hasArg(OPT_C);
1374   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1375 }
1376 
1377 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1378   using namespace cc1options;
1379   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1380   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1381   Opts.Triple = getLastArgValue(Args, OPT_triple);
1382   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1383 
1384   // Use the host triple if unspecified.
1385   if (Opts.Triple.empty())
1386     Opts.Triple = llvm::sys::getHostTriple();
1387 }
1388 
1389 //
1390 
1391 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1392                                         const char **ArgBegin,
1393                                         const char **ArgEnd,
1394                                         Diagnostic &Diags) {
1395   // Parse the arguments.
1396   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1397   unsigned MissingArgIndex, MissingArgCount;
1398   llvm::OwningPtr<InputArgList> Args(
1399     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1400 
1401   // Check for missing argument error.
1402   if (MissingArgCount)
1403     Diags.Report(diag::err_drv_missing_argument)
1404       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1405 
1406   // Issue errors on unknown arguments.
1407   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1408          ie = Args->filtered_end(); it != ie; ++it)
1409     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1410 
1411   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1412   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1413   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1414   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1415   FrontendOptions::InputKind DashX =
1416     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1417   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1418   if (DashX != FrontendOptions::IK_AST)
1419     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1420   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1421   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1422   ParseTargetArgs(Res.getTargetOpts(), *Args);
1423 }
1424