xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 5159f6162e894deedb0be1ab53e3e0f823c9db5d) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Driver/Arg.h"
15 #include "clang/Driver/ArgList.h"
16 #include "clang/Driver/CC1Options.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/OptTable.h"
19 #include "clang/Driver/Option.h"
20 #include "clang/Frontend/CompilerInvocation.h"
21 #include "clang/Frontend/LangStandard.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/StringSwitch.h"
27 #include "llvm/ADT/Triple.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/System/Host.h"
30 #include "llvm/System/Path.h"
31 using namespace clang;
32 
33 static const char *getAnalysisName(Analyses Kind) {
34   switch (Kind) {
35   default:
36     llvm_unreachable("Unknown analysis kind!");
37 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
38   case NAME: return "-" CMDFLAG;
39 #include "clang/Frontend/Analyses.def"
40   }
41 }
42 
43 static const char *getAnalysisStoreName(AnalysisStores Kind) {
44   switch (Kind) {
45   default:
46     llvm_unreachable("Unknown analysis store!");
47 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
48   case NAME##Model: return CMDFLAG;
49 #include "clang/Frontend/Analyses.def"
50   }
51 }
52 
53 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
54   switch (Kind) {
55   default:
56     llvm_unreachable("Unknown analysis constraints!");
57 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
58   case NAME##Model: return CMDFLAG;
59 #include "clang/Frontend/Analyses.def"
60   }
61 }
62 
63 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
64   switch (Kind) {
65   default:
66     llvm_unreachable("Unknown analysis client!");
67 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
68   case PD_##NAME: return CMDFLAG;
69 #include "clang/Frontend/Analyses.def"
70   }
71 }
72 
73 //===----------------------------------------------------------------------===//
74 // Serialization (to args)
75 //===----------------------------------------------------------------------===//
76 
77 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
78                                std::vector<std::string> &Res) {
79   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
80     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
81   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
82     Res.push_back("-analyzer-store");
83     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
84   }
85   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
86     Res.push_back("-analyzer-constraints");
87     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
88   }
89   if (Opts.AnalysisDiagOpt != PD_HTML) {
90     Res.push_back("-analyzer-output");
91     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
92   }
93   if (!Opts.AnalyzeSpecificFunction.empty()) {
94     Res.push_back("-analyze-function");
95     Res.push_back(Opts.AnalyzeSpecificFunction);
96   }
97   if (Opts.AnalyzeAll)
98     Res.push_back("-analyzer-opt-analyze-headers");
99   if (Opts.AnalyzerDisplayProgress)
100     Res.push_back("-analyzer-display-progress");
101   if (Opts.AnalyzeNestedBlocks)
102     Res.push_back("-analyzer-opt-analyze-nested-blocks");
103   if (Opts.AnalyzerStats)
104     Res.push_back("-analyzer-stats");
105   if (Opts.EagerlyAssume)
106     Res.push_back("-analyzer-eagerly-assume");
107   if (!Opts.PurgeDead)
108     Res.push_back("-analyzer-no-purge-dead");
109   if (Opts.TrimGraph)
110     Res.push_back("-trim-egraph");
111   if (Opts.VisualizeEGDot)
112     Res.push_back("-analyzer-viz-egraph-graphviz");
113   if (Opts.VisualizeEGDot)
114     Res.push_back("-analyzer-viz-egraph-ubigraph");
115   if (Opts.EnableExperimentalChecks)
116     Res.push_back("-analyzer-experimental-checks");
117   if (Opts.EnableExperimentalInternalChecks)
118     Res.push_back("-analyzer-experimental-internal-checks");
119   if (Opts.IdempotentOps)
120       Res.push_back("-analyzer-check-idempotent-operations");
121 }
122 
123 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
124                               std::vector<std::string> &Res) {
125   if (Opts.DebugInfo)
126     Res.push_back("-g");
127   if (Opts.DisableLLVMOpts)
128     Res.push_back("-disable-llvm-optzns");
129   if (Opts.DisableRedZone)
130     Res.push_back("-disable-red-zone");
131   if (!Opts.DwarfDebugFlags.empty()) {
132     Res.push_back("-dwarf-debug-flags");
133     Res.push_back(Opts.DwarfDebugFlags);
134   }
135   if (!Opts.MergeAllConstants)
136     Res.push_back("-fno-merge-all-constants");
137   if (Opts.NoCommon)
138     Res.push_back("-fno-common");
139   if (Opts.NoImplicitFloat)
140     Res.push_back("-no-implicit-float");
141   if (Opts.OmitLeafFramePointer)
142     Res.push_back("-momit-leaf-frame-pointer");
143   if (Opts.OptimizeSize) {
144     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
145     Res.push_back("-Os");
146   } else if (Opts.OptimizationLevel != 0)
147     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
148   if (!Opts.MainFileName.empty()) {
149     Res.push_back("-main-file-name");
150     Res.push_back(Opts.MainFileName);
151   }
152   // SimplifyLibCalls is only derived.
153   // TimePasses is only derived.
154   // UnitAtATime is unused.
155   // Inlining is only derived.
156 
157   // UnrollLoops is derived, but also accepts an option, no
158   // harm in pushing it back here.
159   if (Opts.UnrollLoops)
160     Res.push_back("-funroll-loops");
161   if (Opts.DataSections)
162     Res.push_back("-fdata-sections");
163   if (Opts.FunctionSections)
164     Res.push_back("-ffunction-sections");
165   if (Opts.AsmVerbose)
166     Res.push_back("-masm-verbose");
167   if (!Opts.CodeModel.empty()) {
168     Res.push_back("-mcode-model");
169     Res.push_back(Opts.CodeModel);
170   }
171   if (!Opts.CXAAtExit)
172     Res.push_back("-fno-use-cxa-atexit");
173   if (Opts.CXXCtorDtorAliases)
174     Res.push_back("-mconstructor-aliases");
175   if (!Opts.DebugPass.empty()) {
176     Res.push_back("-mdebug-pass");
177     Res.push_back(Opts.DebugPass);
178   }
179   if (Opts.DisableFPElim)
180     Res.push_back("-mdisable-fp-elim");
181   if (!Opts.FloatABI.empty()) {
182     Res.push_back("-mfloat-abi");
183     Res.push_back(Opts.FloatABI);
184   }
185   if (!Opts.LimitFloatPrecision.empty()) {
186     Res.push_back("-mlimit-float-precision");
187     Res.push_back(Opts.LimitFloatPrecision);
188   }
189   if (Opts.NoZeroInitializedInBSS)
190     Res.push_back("-mno-zero-initialized-bss");
191   switch (Opts.getObjCDispatchMethod()) {
192   case CodeGenOptions::Legacy:
193     break;
194   case CodeGenOptions::Mixed:
195     Res.push_back("-fobjc-dispatch-method=mixed");
196     break;
197   case CodeGenOptions::NonLegacy:
198     Res.push_back("-fobjc-dispatch-method=non-legacy");
199     break;
200   }
201   if (Opts.RelaxAll)
202     Res.push_back("-mrelax-all");
203   if (Opts.SoftFloat)
204     Res.push_back("-msoft-float");
205   if (Opts.UnwindTables)
206     Res.push_back("-munwind-tables");
207   if (Opts.RelocationModel != "pic") {
208     Res.push_back("-mrelocation-model");
209     Res.push_back(Opts.RelocationModel);
210   }
211   if (!Opts.VerifyModule)
212     Res.push_back("-disable-llvm-verifier");
213 }
214 
215 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
216                                        std::vector<std::string> &Res) {
217   if (Opts.IncludeSystemHeaders)
218     Res.push_back("-sys-header-deps");
219   if (Opts.UsePhonyTargets)
220     Res.push_back("-MP");
221   if (!Opts.OutputFile.empty()) {
222     Res.push_back("-dependency-file");
223     Res.push_back(Opts.OutputFile);
224   }
225   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
226     Res.push_back("-MT");
227     Res.push_back(Opts.Targets[i]);
228   }
229 }
230 
231 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
232                                  std::vector<std::string> &Res) {
233   if (Opts.IgnoreWarnings)
234     Res.push_back("-w");
235   if (Opts.NoRewriteMacros)
236     Res.push_back("-Wno-rewrite-macros");
237   if (Opts.Pedantic)
238     Res.push_back("-pedantic");
239   if (Opts.PedanticErrors)
240     Res.push_back("-pedantic-errors");
241   if (!Opts.ShowColumn)
242     Res.push_back("-fno-show-column");
243   if (!Opts.ShowLocation)
244     Res.push_back("-fno-show-source-location");
245   if (!Opts.ShowCarets)
246     Res.push_back("-fno-caret-diagnostics");
247   if (!Opts.ShowFixits)
248     Res.push_back("-fno-diagnostics-fixit-info");
249   if (Opts.ShowSourceRanges)
250     Res.push_back("-fdiagnostics-print-source-range-info");
251   if (Opts.ShowParseableFixits)
252     Res.push_back("-fdiagnostics-parseable-fixits");
253   if (Opts.ShowColors)
254     Res.push_back("-fcolor-diagnostics");
255   if (Opts.VerifyDiagnostics)
256     Res.push_back("-verify");
257   if (Opts.ShowOptionNames)
258     Res.push_back("-fdiagnostics-show-option");
259   if (Opts.ShowCategories == 1)
260     Res.push_back("-fdiagnostics-show-category=id");
261   else if (Opts.ShowCategories == 2)
262     Res.push_back("-fdiagnostics-show-category=name");
263   if (Opts.ErrorLimit) {
264     Res.push_back("-ferror-limit");
265     Res.push_back(llvm::utostr(Opts.ErrorLimit));
266   }
267   if (Opts.MacroBacktraceLimit
268                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
269     Res.push_back("-fmacro-backtrace-limit");
270     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
271   }
272   if (Opts.TemplateBacktraceLimit
273                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
274     Res.push_back("-ftemplate-backtrace-limit");
275     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
276   }
277 
278   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
279     Res.push_back("-ftabstop");
280     Res.push_back(llvm::utostr(Opts.TabStop));
281   }
282   if (Opts.MessageLength) {
283     Res.push_back("-fmessage-length");
284     Res.push_back(llvm::utostr(Opts.MessageLength));
285   }
286   if (!Opts.DumpBuildInformation.empty()) {
287     Res.push_back("-dump-build-information");
288     Res.push_back(Opts.DumpBuildInformation);
289   }
290   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
291     Res.push_back("-W" + Opts.Warnings[i]);
292 }
293 
294 static const char *getInputKindName(InputKind Kind) {
295   switch (Kind) {
296   case IK_None:              break;
297   case IK_AST:               return "ast";
298   case IK_Asm:               return "assembler-with-cpp";
299   case IK_C:                 return "c";
300   case IK_CXX:               return "c++";
301   case IK_LLVM_IR:           return "ir";
302   case IK_ObjC:              return "objective-c";
303   case IK_ObjCXX:            return "objective-c++";
304   case IK_OpenCL:            return "cl";
305   case IK_PreprocessedC:     return "cpp-output";
306   case IK_PreprocessedCXX:   return "c++-cpp-output";
307   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
308   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
309   }
310 
311   llvm_unreachable("Unexpected language kind!");
312   return 0;
313 }
314 
315 static const char *getActionName(frontend::ActionKind Kind) {
316   switch (Kind) {
317   case frontend::PluginAction:
318   case frontend::InheritanceView:
319     llvm_unreachable("Invalid kind!");
320 
321   case frontend::ASTDump:                return "-ast-dump";
322   case frontend::ASTPrint:               return "-ast-print";
323   case frontend::ASTPrintXML:            return "-ast-print-xml";
324   case frontend::ASTView:                return "-ast-view";
325   case frontend::BoostCon:               return "-boostcon";
326   case frontend::CreateModule:           return "-create-module";
327   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
328   case frontend::DumpTokens:             return "-dump-tokens";
329   case frontend::EmitAssembly:           return "-S";
330   case frontend::EmitBC:                 return "-emit-llvm-bc";
331   case frontend::EmitHTML:               return "-emit-html";
332   case frontend::EmitLLVM:               return "-emit-llvm";
333   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
334   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
335   case frontend::EmitObj:                return "-emit-obj";
336   case frontend::FixIt:                  return "-fixit";
337   case frontend::GeneratePCH:            return "-emit-pch";
338   case frontend::GeneratePTH:            return "-emit-pth";
339   case frontend::InitOnly:               return "-init-only";
340   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
341   case frontend::PrintDeclContext:       return "-print-decl-contexts";
342   case frontend::PrintPreamble:          return "-print-preamble";
343   case frontend::PrintPreprocessedInput: return "-E";
344   case frontend::RewriteMacros:          return "-rewrite-macros";
345   case frontend::RewriteObjC:            return "-rewrite-objc";
346   case frontend::RewriteTest:            return "-rewrite-test";
347   case frontend::RunAnalysis:            return "-analyze";
348   case frontend::RunPreprocessorOnly:    return "-Eonly";
349   }
350 
351   llvm_unreachable("Unexpected language kind!");
352   return 0;
353 }
354 
355 static void FileSystemOptsToArgs(const FileSystemOptions &Opts,
356                                  std::vector<std::string> &Res) {
357   if (!Opts.WorkingDir.empty()) {
358     Res.push_back("-working-directory");
359     Res.push_back(Opts.WorkingDir);
360   }
361 }
362 
363 static void FrontendOptsToArgs(const FrontendOptions &Opts,
364                                std::vector<std::string> &Res) {
365   if (Opts.DisableFree)
366     Res.push_back("-disable-free");
367   if (Opts.RelocatablePCH)
368     Res.push_back("-relocatable-pch");
369   if (Opts.ChainedPCH)
370     Res.push_back("-chained-pch");
371   if (Opts.ShowHelp)
372     Res.push_back("-help");
373   if (Opts.ShowMacrosInCodeCompletion)
374     Res.push_back("-code-completion-macros");
375   if (Opts.ShowCodePatternsInCodeCompletion)
376     Res.push_back("-code-completion-patterns");
377   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
378     Res.push_back("-no-code-completion-globals");
379   if (Opts.ShowStats)
380     Res.push_back("-print-stats");
381   if (Opts.ShowTimers)
382     Res.push_back("-ftime-report");
383   if (Opts.ShowVersion)
384     Res.push_back("-version");
385   if (Opts.FixWhatYouCan)
386     Res.push_back("-fix-what-you-can");
387 
388   bool NeedLang = false;
389   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
390     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
391         Opts.Inputs[i].first)
392       NeedLang = true;
393   if (NeedLang) {
394     Res.push_back("-x");
395     Res.push_back(getInputKindName(Opts.Inputs[0].first));
396   }
397   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
398     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
399            "Unable to represent this input vector!");
400     Res.push_back(Opts.Inputs[i].second);
401   }
402 
403   if (!Opts.OutputFile.empty()) {
404     Res.push_back("-o");
405     Res.push_back(Opts.OutputFile);
406   }
407   if (!Opts.ViewClassInheritance.empty()) {
408     Res.push_back("-cxx-inheritance-view");
409     Res.push_back(Opts.ViewClassInheritance);
410   }
411   if (!Opts.CodeCompletionAt.FileName.empty()) {
412     Res.push_back("-code-completion-at");
413     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
414                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
415                   llvm::utostr(Opts.CodeCompletionAt.Column));
416   }
417   if (Opts.ProgramAction != frontend::InheritanceView &&
418       Opts.ProgramAction != frontend::PluginAction)
419     Res.push_back(getActionName(Opts.ProgramAction));
420   if (!Opts.ActionName.empty()) {
421     Res.push_back("-plugin");
422     Res.push_back(Opts.ActionName);
423     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
424       Res.push_back("-plugin-arg-" + Opts.ActionName);
425       Res.push_back(Opts.PluginArgs[i]);
426     }
427   }
428   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
429     Res.push_back("-load");
430     Res.push_back(Opts.Plugins[i]);
431   }
432   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
433     Res.push_back("-ast-merge");
434     Res.push_back(Opts.ASTMergeFiles[i]);
435   }
436   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
437     Res.push_back("-import-module");
438     Res.push_back(Opts.Modules[i]);
439   }
440   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
441     Res.push_back("-mllvm");
442     Res.push_back(Opts.LLVMArgs[i]);
443   }
444 }
445 
446 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
447                                    std::vector<std::string> &Res) {
448   if (Opts.Sysroot != "/") {
449     Res.push_back("-isysroot");
450     Res.push_back(Opts.Sysroot);
451   }
452 
453   for (unsigned i = 0, e = Opts.CXXSystemIncludes.size(); i != e; ++i) {
454     Res.push_back("-cxx-system-include");
455     Res.push_back(Opts.CXXSystemIncludes[i]);
456   }
457 
458   /// User specified include entries.
459   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
460     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
461     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
462       llvm::report_fatal_error("Invalid option set!");
463     if (E.IsUserSupplied) {
464       if (E.Group == frontend::After) {
465         Res.push_back("-idirafter");
466       } else if (E.Group == frontend::Quoted) {
467         Res.push_back("-iquote");
468       } else if (E.Group == frontend::System) {
469         Res.push_back("-isystem");
470       } else {
471         assert(E.Group == frontend::Angled && "Invalid group!");
472         Res.push_back(E.IsFramework ? "-F" : "-I");
473       }
474     } else {
475       if (E.Group != frontend::Angled && E.Group != frontend::System)
476         llvm::report_fatal_error("Invalid option set!");
477       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
478                     "-iwithprefix");
479     }
480     Res.push_back(E.Path);
481   }
482 
483   if (!Opts.EnvIncPath.empty()) {
484     // FIXME: Provide an option for this, and move env detection to driver.
485     llvm::report_fatal_error("Not yet implemented!");
486   }
487   if (!Opts.CEnvIncPath.empty()) {
488     // FIXME: Provide an option for this, and move env detection to driver.
489     llvm::report_fatal_error("Not yet implemented!");
490   }
491   if (!Opts.ObjCEnvIncPath.empty()) {
492     // FIXME: Provide an option for this, and move env detection to driver.
493     llvm::report_fatal_error("Not yet implemented!");
494   }
495   if (!Opts.CXXEnvIncPath.empty()) {
496     // FIXME: Provide an option for this, and move env detection to driver.
497     llvm::report_fatal_error("Not yet implemented!");
498   }
499   if (!Opts.ObjCXXEnvIncPath.empty()) {
500     // FIXME: Provide an option for this, and move env detection to driver.
501     llvm::report_fatal_error("Not yet implemented!");
502   }
503   if (!Opts.ResourceDir.empty()) {
504     Res.push_back("-resource-dir");
505     Res.push_back(Opts.ResourceDir);
506   }
507   if (!Opts.UseStandardIncludes)
508     Res.push_back("-nostdinc");
509   if (!Opts.UseStandardCXXIncludes)
510     Res.push_back("-nostdinc++");
511   if (Opts.Verbose)
512     Res.push_back("-v");
513 }
514 
515 static void LangOptsToArgs(const LangOptions &Opts,
516                            std::vector<std::string> &Res) {
517   LangOptions DefaultLangOpts;
518 
519   // FIXME: Need to set -std to get all the implicit options.
520 
521   // FIXME: We want to only pass options relative to the defaults, which
522   // requires constructing a target. :(
523   //
524   // It would be better to push the all target specific choices into the driver,
525   // so that everything below that was more uniform.
526 
527   if (Opts.Trigraphs)
528     Res.push_back("-trigraphs");
529   // Implicit based on the input kind:
530   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
531   // Implicit based on the input language standard:
532   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
533   if (Opts.DollarIdents)
534     Res.push_back("-fdollars-in-identifiers");
535   if (Opts.GNUMode && !Opts.GNUKeywords)
536     Res.push_back("-fno-gnu-keywords");
537   if (!Opts.GNUMode && Opts.GNUKeywords)
538     Res.push_back("-fgnu-keywords");
539   if (Opts.Microsoft)
540     Res.push_back("-fms-extensions");
541   if (Opts.MSCVersion != 0)
542     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
543   if (Opts.Borland)
544     Res.push_back("-fborland-extensions");
545   if (Opts.ObjCNonFragileABI)
546     Res.push_back("-fobjc-nonfragile-abi");
547   if (Opts.ObjCNonFragileABI2)
548     Res.push_back("-fobjc-nonfragile-abi2");
549   // NoInline is implicit.
550   if (!Opts.CXXOperatorNames)
551     Res.push_back("-fno-operator-names");
552   if (Opts.PascalStrings)
553     Res.push_back("-fpascal-strings");
554   if (Opts.CatchUndefined)
555     Res.push_back("-fcatch-undefined-behavior");
556   if (Opts.WritableStrings)
557     Res.push_back("-fwritable-strings");
558   if (Opts.ConstStrings)
559     Res.push_back("-Wwrite-strings");
560   if (!Opts.LaxVectorConversions)
561     Res.push_back("-fno-lax-vector-conversions");
562   if (Opts.AltiVec)
563     Res.push_back("-faltivec");
564   if (Opts.Exceptions)
565     Res.push_back("-fexceptions");
566   if (Opts.SjLjExceptions)
567     Res.push_back("-fsjlj-exceptions");
568   if (!Opts.RTTI)
569     Res.push_back("-fno-rtti");
570   if (!Opts.NeXTRuntime)
571     Res.push_back("-fgnu-runtime");
572   if (Opts.Freestanding)
573     Res.push_back("-ffreestanding");
574   if (Opts.NoBuiltin)
575     Res.push_back("-fno-builtin");
576   if (!Opts.AssumeSaneOperatorNew)
577     Res.push_back("-fno-assume-sane-operator-new");
578   if (!Opts.ThreadsafeStatics)
579     Res.push_back("-fno-threadsafe-statics");
580   if (Opts.POSIXThreads)
581     Res.push_back("-pthread");
582   if (Opts.Blocks)
583     Res.push_back("-fblocks");
584   if (Opts.EmitAllDecls)
585     Res.push_back("-femit-all-decls");
586   if (Opts.MathErrno)
587     Res.push_back("-fmath-errno");
588   switch (Opts.getSignedOverflowBehavior()) {
589   case LangOptions::SOB_Undefined: break;
590   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
591   case LangOptions::SOB_Trapping:
592     Res.push_back("-ftrapv"); break;
593     if (!Opts.OverflowHandler.empty()) {
594       Res.push_back("-ftrapv-handler");
595       Res.push_back(Opts.OverflowHandler);
596     }
597   }
598   if (Opts.HeinousExtensions)
599     Res.push_back("-fheinous-gnu-extensions");
600   // Optimize is implicit.
601   // OptimizeSize is implicit.
602   if (Opts.Static)
603     Res.push_back("-static-define");
604   if (Opts.DumpRecordLayouts)
605     Res.push_back("-fdump-record-layouts");
606   if (Opts.DumpVTableLayouts)
607     Res.push_back("-fdump-vtable-layouts");
608   if (Opts.NoBitFieldTypeAlign)
609     Res.push_back("-fno-bitfield-type-alignment");
610   if (Opts.SjLjExceptions)
611     Res.push_back("-fsjlj-exceptions");
612   if (Opts.PICLevel) {
613     Res.push_back("-pic-level");
614     Res.push_back(llvm::utostr(Opts.PICLevel));
615   }
616   if (Opts.ObjCGCBitmapPrint)
617     Res.push_back("-print-ivar-layout");
618   if (Opts.NoConstantCFStrings)
619     Res.push_back("-fno-constant-cfstrings");
620   if (!Opts.AccessControl)
621     Res.push_back("-fno-access-control");
622   if (!Opts.CharIsSigned)
623     Res.push_back("-fno-signed-char");
624   if (Opts.ShortWChar)
625     Res.push_back("-fshort-wchar");
626   if (!Opts.ElideConstructors)
627     Res.push_back("-fno-elide-constructors");
628   if (Opts.getGCMode() != LangOptions::NonGC) {
629     if (Opts.getGCMode() == LangOptions::HybridGC) {
630       Res.push_back("-fobjc-gc");
631     } else {
632       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
633       Res.push_back("-fobjc-gc-only");
634     }
635   }
636   if (Opts.getVisibilityMode() != DefaultVisibility) {
637     Res.push_back("-fvisibility");
638     if (Opts.getVisibilityMode() == HiddenVisibility) {
639       Res.push_back("hidden");
640     } else {
641       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
642              "Invalid visibility!");
643       Res.push_back("protected");
644     }
645   }
646   if (Opts.InlineVisibilityHidden)
647     Res.push_back("-fvisibility-inlines-hidden");
648 
649   if (Opts.getStackProtectorMode() != 0) {
650     Res.push_back("-stack-protector");
651     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
652   }
653   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
654     Res.push_back("-ftemplate-depth");
655     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
656   }
657   if (!Opts.ObjCConstantStringClass.empty()) {
658     Res.push_back("-fconstant-string-class");
659     Res.push_back(Opts.ObjCConstantStringClass);
660   }
661 }
662 
663 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
664                                    std::vector<std::string> &Res) {
665   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
666     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
667                   Opts.Macros[i].first);
668   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
669     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
670     Res.push_back("-include");
671     Res.push_back(Opts.Includes[i]);
672   }
673   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
674     Res.push_back("-imacros");
675     Res.push_back(Opts.MacroIncludes[i]);
676   }
677   if (!Opts.UsePredefines)
678     Res.push_back("-undef");
679   if (Opts.DetailedRecord)
680     Res.push_back("-detailed-preprocessing-record");
681   if (!Opts.ImplicitPCHInclude.empty()) {
682     Res.push_back("-include-pch");
683     Res.push_back(Opts.ImplicitPCHInclude);
684   }
685   if (!Opts.ImplicitPTHInclude.empty()) {
686     Res.push_back("-include-pth");
687     Res.push_back(Opts.ImplicitPTHInclude);
688   }
689   if (!Opts.TokenCache.empty()) {
690     if (Opts.ImplicitPTHInclude.empty()) {
691       Res.push_back("-token-cache");
692       Res.push_back(Opts.TokenCache);
693     } else
694       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
695              "Unsupported option combination!");
696   }
697   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
698     Res.push_back("-remap-file");
699     Res.push_back(Opts.RemappedFiles[i].first + ";" +
700                   Opts.RemappedFiles[i].second);
701   }
702 }
703 
704 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
705                                          std::vector<std::string> &Res) {
706   if (!Opts.ShowCPP && !Opts.ShowMacros)
707     llvm::report_fatal_error("Invalid option combination!");
708 
709   if (Opts.ShowCPP && Opts.ShowMacros)
710     Res.push_back("-dD");
711   else if (!Opts.ShowCPP && Opts.ShowMacros)
712     Res.push_back("-dM");
713 
714   if (Opts.ShowHeaderIncludes)
715     Res.push_back("-H");
716   if (!Opts.ShowLineMarkers)
717     Res.push_back("-P");
718   if (Opts.ShowComments)
719     Res.push_back("-C");
720   if (Opts.ShowMacroComments)
721     Res.push_back("-CC");
722 }
723 
724 static void TargetOptsToArgs(const TargetOptions &Opts,
725                              std::vector<std::string> &Res) {
726   Res.push_back("-triple");
727   Res.push_back(Opts.Triple);
728   if (!Opts.CPU.empty()) {
729     Res.push_back("-target-cpu");
730     Res.push_back(Opts.CPU);
731   }
732   if (!Opts.ABI.empty()) {
733     Res.push_back("-target-abi");
734     Res.push_back(Opts.ABI);
735   }
736   if (!Opts.LinkerVersion.empty()) {
737     Res.push_back("-target-linker-version");
738     Res.push_back(Opts.LinkerVersion);
739   }
740   if (!Opts.CXXABI.empty()) {
741     Res.push_back("-cxx-abi");
742     Res.push_back(Opts.CXXABI);
743   }
744   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
745     Res.push_back("-target-feature");
746     Res.push_back(Opts.Features[i]);
747   }
748 }
749 
750 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
751   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
752   CodeGenOptsToArgs(getCodeGenOpts(), Res);
753   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
754   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
755   FileSystemOptsToArgs(getFileSystemOpts(), Res);
756   FrontendOptsToArgs(getFrontendOpts(), Res);
757   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
758   LangOptsToArgs(getLangOpts(), Res);
759   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
760   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
761   TargetOptsToArgs(getTargetOpts(), Res);
762 }
763 
764 //===----------------------------------------------------------------------===//
765 // Deserialization (to args)
766 //===----------------------------------------------------------------------===//
767 
768 using namespace clang::driver;
769 using namespace clang::driver::cc1options;
770 
771 //
772 
773 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
774                               Diagnostic &Diags) {
775   using namespace cc1options;
776 
777   Opts.AnalysisList.clear();
778 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
779   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
780 #include "clang/Frontend/Analyses.def"
781 
782   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
783     llvm::StringRef Name = A->getValue(Args);
784     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
785 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
786       .Case(CMDFLAG, NAME##Model)
787 #include "clang/Frontend/Analyses.def"
788       .Default(NumStores);
789     // FIXME: Error handling.
790     if (Value == NumStores)
791       Diags.Report(diag::err_drv_invalid_value)
792         << A->getAsString(Args) << Name;
793     else
794       Opts.AnalysisStoreOpt = Value;
795   }
796 
797   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
798     llvm::StringRef Name = A->getValue(Args);
799     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
800 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
801       .Case(CMDFLAG, NAME##Model)
802 #include "clang/Frontend/Analyses.def"
803       .Default(NumConstraints);
804     // FIXME: Error handling.
805     if (Value == NumConstraints)
806       Diags.Report(diag::err_drv_invalid_value)
807         << A->getAsString(Args) << Name;
808     else
809       Opts.AnalysisConstraintsOpt = Value;
810   }
811 
812   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
813     llvm::StringRef Name = A->getValue(Args);
814     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
815 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
816       .Case(CMDFLAG, PD_##NAME)
817 #include "clang/Frontend/Analyses.def"
818       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
819     // FIXME: Error handling.
820     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
821       Diags.Report(diag::err_drv_invalid_value)
822         << A->getAsString(Args) << Name;
823     else
824       Opts.AnalysisDiagOpt = Value;
825   }
826 
827   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
828   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
829   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
830   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
831   Opts.AnalyzeNestedBlocks =
832     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
833   Opts.AnalyzerStats = Args.hasArg(OPT_analysis_AnalyzerStats);
834   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
835   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
836   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
837   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
838   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
839   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
840   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
841   Opts.EnableExperimentalInternalChecks =
842     Args.hasArg(OPT_analyzer_experimental_internal_checks);
843   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
844   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
845   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
846   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
847   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
848 }
849 
850 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
851                              Diagnostic &Diags) {
852   using namespace cc1options;
853   // -Os implies -O2
854   if (Args.hasArg(OPT_Os))
855     Opts.OptimizationLevel = 2;
856   else {
857     Opts.OptimizationLevel = Args.getLastArgIntValue(OPT_O, 0, Diags);
858     if (Opts.OptimizationLevel > 3) {
859       Diags.Report(diag::err_drv_invalid_value)
860         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
861       Opts.OptimizationLevel = 3;
862     }
863   }
864 
865   // We must always run at least the always inlining pass.
866   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
867     : CodeGenOptions::OnlyAlwaysInlining;
868 
869   Opts.DebugInfo = Args.hasArg(OPT_g);
870   Opts.LimitDebugInfo = Args.hasArg(OPT_flimit_debug_info);
871   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
872   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
873   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
874   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
875   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
876   Opts.NoCommon = Args.hasArg(OPT_fno_common);
877   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
878   Opts.OptimizeSize = Args.hasArg(OPT_Os);
879   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
880                             Args.hasArg(OPT_ffreestanding));
881   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
882                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
883 
884   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
885   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
886   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
887   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
888   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
889   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
890   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
891   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
892   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
893   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
894   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
895   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
896   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
897   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
898   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
899 
900   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
901   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
902 
903   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
904   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
905 
906   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
907 
908   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
909     llvm::StringRef Name = A->getValue(Args);
910     unsigned Method = llvm::StringSwitch<unsigned>(Name)
911       .Case("legacy", CodeGenOptions::Legacy)
912       .Case("non-legacy", CodeGenOptions::NonLegacy)
913       .Case("mixed", CodeGenOptions::Mixed)
914       .Default(~0U);
915     if (Method == ~0U)
916       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
917     else
918       Opts.ObjCDispatchMethod = Method;
919   }
920 }
921 
922 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
923                                       ArgList &Args) {
924   using namespace cc1options;
925   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
926   Opts.Targets = Args.getAllArgValues(OPT_MT);
927   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
928   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
929 }
930 
931 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
932                                 Diagnostic &Diags) {
933   using namespace cc1options;
934   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
935   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
936   Opts.Pedantic = Args.hasArg(OPT_pedantic);
937   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
938   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
939   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
940   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
941   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
942   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
943   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
944 
945   llvm::StringRef ShowOverloads =
946     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
947   if (ShowOverloads == "best")
948     Opts.ShowOverloads = Diagnostic::Ovl_Best;
949   else if (ShowOverloads == "all")
950     Opts.ShowOverloads = Diagnostic::Ovl_All;
951   else
952     Diags.Report(diag::err_drv_invalid_value)
953       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
954       << ShowOverloads;
955 
956   llvm::StringRef ShowCategory =
957     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
958   if (ShowCategory == "none")
959     Opts.ShowCategories = 0;
960   else if (ShowCategory == "id")
961     Opts.ShowCategories = 1;
962   else if (ShowCategory == "name")
963     Opts.ShowCategories = 2;
964   else
965     Diags.Report(diag::err_drv_invalid_value)
966       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
967       << ShowCategory;
968 
969   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
970   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
971   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
972   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
973   Opts.MacroBacktraceLimit
974     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
975                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
976   Opts.TemplateBacktraceLimit
977     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
978                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
979                          Diags);
980   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
981                                     DiagnosticOptions::DefaultTabStop, Diags);
982   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
983     Diags.Report(diag::warn_ignoring_ftabstop_value)
984       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
985     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
986   }
987   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
988   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
989   Opts.Warnings = Args.getAllArgValues(OPT_W);
990 }
991 
992 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
993   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
994 }
995 
996 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
997                                    Diagnostic &Diags) {
998   using namespace cc1options;
999   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1000   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1001     switch (A->getOption().getID()) {
1002     default:
1003       assert(0 && "Invalid option in group!");
1004     case OPT_ast_dump:
1005       Opts.ProgramAction = frontend::ASTDump; break;
1006     case OPT_ast_print:
1007       Opts.ProgramAction = frontend::ASTPrint; break;
1008     case OPT_ast_print_xml:
1009       Opts.ProgramAction = frontend::ASTPrintXML; break;
1010     case OPT_ast_view:
1011       Opts.ProgramAction = frontend::ASTView; break;
1012     case OPT_boostcon:
1013       Opts.ProgramAction = frontend::BoostCon; break;
1014     case OPT_dump_raw_tokens:
1015       Opts.ProgramAction = frontend::DumpRawTokens; break;
1016     case OPT_dump_tokens:
1017       Opts.ProgramAction = frontend::DumpTokens; break;
1018     case OPT_S:
1019       Opts.ProgramAction = frontend::EmitAssembly; break;
1020     case OPT_emit_llvm_bc:
1021       Opts.ProgramAction = frontend::EmitBC; break;
1022     case OPT_emit_html:
1023       Opts.ProgramAction = frontend::EmitHTML; break;
1024     case OPT_emit_llvm:
1025       Opts.ProgramAction = frontend::EmitLLVM; break;
1026     case OPT_emit_llvm_only:
1027       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1028     case OPT_emit_codegen_only:
1029       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1030     case OPT_emit_obj:
1031       Opts.ProgramAction = frontend::EmitObj; break;
1032     case OPT_fixit_EQ:
1033       Opts.FixItSuffix = A->getValue(Args);
1034       // fall-through!
1035     case OPT_fixit:
1036       Opts.ProgramAction = frontend::FixIt; break;
1037     case OPT_emit_pch:
1038       Opts.ProgramAction = frontend::GeneratePCH; break;
1039     case OPT_emit_pth:
1040       Opts.ProgramAction = frontend::GeneratePTH; break;
1041     case OPT_init_only:
1042       Opts.ProgramAction = frontend::InitOnly; break;
1043     case OPT_fsyntax_only:
1044       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1045     case OPT_print_decl_contexts:
1046       Opts.ProgramAction = frontend::PrintDeclContext; break;
1047     case OPT_print_preamble:
1048       Opts.ProgramAction = frontend::PrintPreamble; break;
1049     case OPT_E:
1050       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1051     case OPT_rewrite_macros:
1052       Opts.ProgramAction = frontend::RewriteMacros; break;
1053     case OPT_rewrite_objc:
1054       Opts.ProgramAction = frontend::RewriteObjC; break;
1055     case OPT_rewrite_test:
1056       Opts.ProgramAction = frontend::RewriteTest; break;
1057     case OPT_analyze:
1058       Opts.ProgramAction = frontend::RunAnalysis; break;
1059     case OPT_Eonly:
1060       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1061     case OPT_create_module:
1062       Opts.ProgramAction = frontend::CreateModule; break;
1063     }
1064   }
1065 
1066   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1067     Opts.Plugins.push_back(A->getValue(Args,0));
1068     Opts.ProgramAction = frontend::PluginAction;
1069     Opts.ActionName = A->getValue(Args);
1070 
1071     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1072            end = Args.filtered_end(); it != end; ++it) {
1073       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1074         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1075     }
1076   }
1077 
1078   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1079     Opts.CodeCompletionAt =
1080       ParsedSourceLocation::FromString(A->getValue(Args));
1081     if (Opts.CodeCompletionAt.FileName.empty())
1082       Diags.Report(diag::err_drv_invalid_value)
1083         << A->getAsString(Args) << A->getValue(Args);
1084   }
1085   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1086 
1087   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1088   Opts.Plugins = Args.getAllArgValues(OPT_load);
1089   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1090   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1091   Opts.ShowHelp = Args.hasArg(OPT_help);
1092   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1093   Opts.ShowCodePatternsInCodeCompletion
1094     = Args.hasArg(OPT_code_completion_patterns);
1095   Opts.ShowGlobalSymbolsInCodeCompletion
1096     = !Args.hasArg(OPT_no_code_completion_globals);
1097   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1098   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1099   Opts.ShowVersion = Args.hasArg(OPT_version);
1100   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1101   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1102   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1103   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1104   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1105 
1106   InputKind DashX = IK_None;
1107   if (const Arg *A = Args.getLastArg(OPT_x)) {
1108     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1109       .Case("c", IK_C)
1110       .Case("cl", IK_OpenCL)
1111       .Case("c", IK_C)
1112       .Case("cl", IK_OpenCL)
1113       .Case("c++", IK_CXX)
1114       .Case("objective-c", IK_ObjC)
1115       .Case("objective-c++", IK_ObjCXX)
1116       .Case("cpp-output", IK_PreprocessedC)
1117       .Case("assembler-with-cpp", IK_Asm)
1118       .Case("c++-cpp-output", IK_PreprocessedCXX)
1119       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1120       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1121       .Case("c-header", IK_C)
1122       .Case("objective-c-header", IK_ObjC)
1123       .Case("c++-header", IK_CXX)
1124       .Case("objective-c++-header", IK_ObjCXX)
1125       .Case("ast", IK_AST)
1126       .Case("ir", IK_LLVM_IR)
1127       .Default(IK_None);
1128     if (DashX == IK_None)
1129       Diags.Report(diag::err_drv_invalid_value)
1130         << A->getAsString(Args) << A->getValue(Args);
1131   }
1132 
1133   // '-' is the default input if none is given.
1134   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1135   Opts.Inputs.clear();
1136   if (Inputs.empty())
1137     Inputs.push_back("-");
1138   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1139     InputKind IK = DashX;
1140     if (IK == IK_None) {
1141       IK = FrontendOptions::getInputKindForExtension(
1142         llvm::StringRef(Inputs[i]).rsplit('.').second);
1143       // FIXME: Remove this hack.
1144       if (i == 0)
1145         DashX = IK;
1146     }
1147     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1148   }
1149 
1150   return DashX;
1151 }
1152 
1153 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1154                                                  void *MainAddr) {
1155   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1156 
1157   if (!P.isEmpty()) {
1158     P.eraseComponent();  // Remove /clang from foo/bin/clang
1159     P.eraseComponent();  // Remove /bin   from foo/bin
1160 
1161     // Get foo/lib/clang/<version>/include
1162     P.appendComponent("lib");
1163     P.appendComponent("clang");
1164     P.appendComponent(CLANG_VERSION_STRING);
1165   }
1166 
1167   return P.str();
1168 }
1169 
1170 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1171   using namespace cc1options;
1172   Opts.CXXSystemIncludes = Args.getAllArgValues(OPT_cxx_system_include);
1173   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1174   Opts.Verbose = Args.hasArg(OPT_v);
1175   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1176   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1177   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1178   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1179 
1180   // Add -I... and -F... options in order.
1181   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1182          ie = Args.filtered_end(); it != ie; ++it)
1183     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1184                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1185 
1186   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1187   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1188   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1189                                              OPT_iwithprefixbefore),
1190          ie = Args.filtered_end(); it != ie; ++it) {
1191     const Arg *A = *it;
1192     if (A->getOption().matches(OPT_iprefix))
1193       Prefix = A->getValue(Args);
1194     else if (A->getOption().matches(OPT_iwithprefix))
1195       Opts.AddPath(Prefix.str() + A->getValue(Args),
1196                    frontend::System, false, false, true);
1197     else
1198       Opts.AddPath(Prefix.str() + A->getValue(Args),
1199                    frontend::Angled, false, false, true);
1200   }
1201 
1202   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1203          ie = Args.filtered_end(); it != ie; ++it)
1204     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1205   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1206          ie = Args.filtered_end(); it != ie; ++it)
1207     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1208   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1209          ie = Args.filtered_end(); it != ie; ++it)
1210     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1211                  (*it)->getOption().matches(OPT_iwithsysroot));
1212 
1213   // FIXME: Need options for the various environment variables!
1214 }
1215 
1216 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1217                           Diagnostic &Diags) {
1218   // FIXME: Cleanup per-file based stuff.
1219 
1220   // Set some properties which depend soley on the input kind; it would be nice
1221   // to move these to the language standard, and have the driver resolve the
1222   // input kind + language standard.
1223   if (IK == IK_Asm) {
1224     Opts.AsmPreprocessor = 1;
1225   } else if (IK == IK_ObjC ||
1226              IK == IK_ObjCXX ||
1227              IK == IK_PreprocessedObjC ||
1228              IK == IK_PreprocessedObjCXX) {
1229     Opts.ObjC1 = Opts.ObjC2 = 1;
1230   }
1231 
1232   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1233   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1234     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1235 #define LANGSTANDARD(id, name, desc, features) \
1236       .Case(name, LangStandard::lang_##id)
1237 #include "clang/Frontend/LangStandards.def"
1238       .Default(LangStandard::lang_unspecified);
1239     if (LangStd == LangStandard::lang_unspecified)
1240       Diags.Report(diag::err_drv_invalid_value)
1241         << A->getAsString(Args) << A->getValue(Args);
1242   }
1243 
1244   if (LangStd == LangStandard::lang_unspecified) {
1245     // Based on the base language, pick one.
1246     switch (IK) {
1247     case IK_None:
1248     case IK_AST:
1249     case IK_LLVM_IR:
1250       assert(0 && "Invalid input kind!");
1251     case IK_OpenCL:
1252       LangStd = LangStandard::lang_opencl;
1253       break;
1254     case IK_Asm:
1255     case IK_C:
1256     case IK_PreprocessedC:
1257     case IK_ObjC:
1258     case IK_PreprocessedObjC:
1259       LangStd = LangStandard::lang_gnu99;
1260       break;
1261     case IK_CXX:
1262     case IK_PreprocessedCXX:
1263     case IK_ObjCXX:
1264     case IK_PreprocessedObjCXX:
1265       LangStd = LangStandard::lang_gnucxx98;
1266       break;
1267     }
1268   }
1269 
1270   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1271   Opts.BCPLComment = Std.hasBCPLComments();
1272   Opts.C99 = Std.isC99();
1273   Opts.CPlusPlus = Std.isCPlusPlus();
1274   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1275   Opts.Digraphs = Std.hasDigraphs();
1276   Opts.GNUMode = Std.isGNUMode();
1277   Opts.GNUInline = !Std.isC99();
1278   Opts.HexFloats = Std.hasHexFloats();
1279   Opts.ImplicitInt = Std.hasImplicitInt();
1280 
1281   // OpenCL has some additional defaults.
1282   if (LangStd == LangStandard::lang_opencl) {
1283     Opts.OpenCL = 1;
1284     Opts.AltiVec = 1;
1285     Opts.CXXOperatorNames = 1;
1286     Opts.LaxVectorConversions = 1;
1287   }
1288 
1289   // OpenCL and C++ both have bool, true, false keywords.
1290   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1291 
1292   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1293   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1294   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1295   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1296   // name, as it doesn't seem a useful distinction.
1297   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1298                                   Opts.GNUMode);
1299 
1300   if (Opts.CPlusPlus)
1301     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1302 
1303   if (Args.hasArg(OPT_fobjc_gc_only))
1304     Opts.setGCMode(LangOptions::GCOnly);
1305   else if (Args.hasArg(OPT_fobjc_gc))
1306     Opts.setGCMode(LangOptions::HybridGC);
1307 
1308   if (Args.hasArg(OPT_print_ivar_layout))
1309     Opts.ObjCGCBitmapPrint = 1;
1310   if (Args.hasArg(OPT_fno_constant_cfstrings))
1311     Opts.NoConstantCFStrings = 1;
1312 
1313   if (Args.hasArg(OPT_faltivec))
1314     Opts.AltiVec = 1;
1315 
1316   if (Args.hasArg(OPT_pthread))
1317     Opts.POSIXThreads = 1;
1318 
1319   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1320   if (Vis == "default")
1321     Opts.setVisibilityMode(DefaultVisibility);
1322   else if (Vis == "hidden")
1323     Opts.setVisibilityMode(HiddenVisibility);
1324   else if (Vis == "protected")
1325     Opts.setVisibilityMode(ProtectedVisibility);
1326   else
1327     Diags.Report(diag::err_drv_invalid_value)
1328       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1329 
1330   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1331     Opts.InlineVisibilityHidden = 1;
1332 
1333   if (Args.hasArg(OPT_ftrapv)) {
1334     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1335     // Set the handler, if one is specified.
1336     Opts.OverflowHandler =
1337         Args.getLastArgValue(OPT_ftrapv_handler);
1338   }
1339   else if (Args.hasArg(OPT_fwrapv))
1340     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1341 
1342   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1343   // is specified, or -std is set to a conforming mode.
1344   Opts.Trigraphs = !Opts.GNUMode;
1345   if (Args.hasArg(OPT_trigraphs))
1346     Opts.Trigraphs = 1;
1347 
1348   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1349                                    OPT_fno_dollars_in_identifiers,
1350                                    !Opts.AsmPreprocessor);
1351   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1352   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1353   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1354   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1355   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1356   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1357   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1358     Opts.LaxVectorConversions = 0;
1359   if (Args.hasArg(OPT_fno_threadsafe_statics))
1360     Opts.ThreadsafeStatics = 0;
1361   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1362   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1363   Opts.Blocks = Args.hasArg(OPT_fblocks);
1364   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1365   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1366   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1367   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1368   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1369   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1370   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1371   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1372   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1373   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1374   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1375                                                Diags);
1376   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
1377                                                     0, Diags);
1378   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1379   Opts.ObjCConstantStringClass =
1380     Args.getLastArgValue(OPT_fconstant_string_class);
1381   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1382   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1383   if (Opts.ObjCNonFragileABI2)
1384     Opts.ObjCNonFragileABI = true;
1385   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1386   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1387   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1388   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1389   Opts.Static = Args.hasArg(OPT_static_define);
1390   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1391   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1392   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1393   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1394   Opts.OptimizeSize = 0;
1395 
1396   // FIXME: Eliminate this dependency.
1397   unsigned Opt =
1398     Args.hasArg(OPT_Os) ? 2 : Args.getLastArgIntValue(OPT_O, 0, Diags);
1399   Opts.Optimize = Opt != 0;
1400 
1401   // This is the __NO_INLINE__ define, which just depends on things like the
1402   // optimization level and -fno-inline, not actually whether the backend has
1403   // inlining enabled.
1404   //
1405   // FIXME: This is affected by other options (-fno-inline).
1406   Opts.NoInline = !Opt;
1407 
1408   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1409   switch (SSP) {
1410   default:
1411     Diags.Report(diag::err_drv_invalid_value)
1412       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1413     break;
1414   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1415   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1416   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1417   }
1418 }
1419 
1420 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1421                                   FileManager &FileMgr,
1422                                   Diagnostic &Diags) {
1423   using namespace cc1options;
1424   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1425   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1426   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1427       Opts.TokenCache = A->getValue(Args);
1428   else
1429     Opts.TokenCache = Opts.ImplicitPTHInclude;
1430   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1431   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1432   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1433 
1434   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1435   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1436          ie = Args.filtered_end(); it != ie; ++it) {
1437     const Arg *A = *it;
1438     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
1439   }
1440 
1441   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1442     llvm::StringRef Value(A->getValue(Args));
1443     size_t Comma = Value.find(',');
1444     unsigned Bytes = 0;
1445     unsigned EndOfLine = 0;
1446 
1447     if (Comma == llvm::StringRef::npos ||
1448         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1449         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1450       Diags.Report(diag::err_drv_preamble_format);
1451     else {
1452       Opts.PrecompiledPreambleBytes.first = Bytes;
1453       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1454     }
1455   }
1456 
1457   // Add macros from the command line.
1458   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1459          ie = Args.filtered_end(); it != ie; ++it) {
1460     if ((*it)->getOption().matches(OPT_D))
1461       Opts.addMacroDef((*it)->getValue(Args));
1462     else
1463       Opts.addMacroUndef((*it)->getValue(Args));
1464   }
1465 
1466   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1467 
1468   // Add the ordered list of -includes.
1469   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1470                                              OPT_include_pth),
1471          ie = Args.filtered_end(); it != ie; ++it) {
1472     const Arg *A = *it;
1473     // PCH is handled specially, we need to extra the original include path.
1474     if (A->getOption().matches(OPT_include_pch)) {
1475       std::string OriginalFile =
1476         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
1477       if (OriginalFile.empty())
1478         continue;
1479 
1480       Opts.Includes.push_back(OriginalFile);
1481     } else
1482       Opts.Includes.push_back(A->getValue(Args));
1483   }
1484 
1485   // Include 'altivec.h' if -faltivec option present
1486   if (Args.hasArg(OPT_faltivec))
1487     Opts.Includes.push_back("altivec.h");
1488 
1489   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1490          ie = Args.filtered_end(); it != ie; ++it) {
1491     const Arg *A = *it;
1492     std::pair<llvm::StringRef,llvm::StringRef> Split =
1493       llvm::StringRef(A->getValue(Args)).split(';');
1494 
1495     if (Split.second.empty()) {
1496       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1497       continue;
1498     }
1499 
1500     Opts.addRemappedFile(Split.first, Split.second);
1501   }
1502 }
1503 
1504 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1505                                         ArgList &Args) {
1506   using namespace cc1options;
1507   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1508   Opts.ShowComments = Args.hasArg(OPT_C);
1509   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1510   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1511   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1512   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1513 }
1514 
1515 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1516   using namespace cc1options;
1517   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1518   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1519   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1520   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1521   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1522   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1523 
1524   // Use the host triple if unspecified.
1525   if (Opts.Triple.empty())
1526     Opts.Triple = llvm::sys::getHostTriple();
1527 }
1528 
1529 //
1530 
1531 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1532                                         const char *const *ArgBegin,
1533                                         const char *const *ArgEnd,
1534                                         Diagnostic &Diags) {
1535   // Parse the arguments.
1536   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1537   unsigned MissingArgIndex, MissingArgCount;
1538   llvm::OwningPtr<InputArgList> Args(
1539     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1540 
1541   // Check for missing argument error.
1542   if (MissingArgCount)
1543     Diags.Report(diag::err_drv_missing_argument)
1544       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1545 
1546   // Issue errors on unknown arguments.
1547   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1548          ie = Args->filtered_end(); it != ie; ++it)
1549     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1550 
1551   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1552   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1553   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1554   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1555   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1556   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1557   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1558   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1559     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1560   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1561   // PCH file and find the original header name. Remove the need to do that in
1562   // ParsePreprocessorArgs and remove the FileManager
1563   // parameters from the function and the "FileManager.h" #include.
1564   FileManager FileMgr(Res.getFileSystemOpts());
1565   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1566   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1567   ParseTargetArgs(Res.getTargetOpts(), *Args);
1568 }
1569