xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 1fcc18c7bcaf89cdf6c65ca4a17e1e92e35bbdc8) 
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/Serialization/ASTReader.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/ADT/Triple.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/System/Host.h"
29 #include "llvm/System/Path.h"
30 using namespace clang;
31 
32 static const char *getAnalysisName(Analyses Kind) {
33   switch (Kind) {
34   default:
35     llvm_unreachable("Unknown analysis kind!");
36 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
37   case NAME: return "-" CMDFLAG;
38 #include "clang/Frontend/Analyses.def"
39   }
40 }
41 
42 static const char *getAnalysisStoreName(AnalysisStores Kind) {
43   switch (Kind) {
44   default:
45     llvm_unreachable("Unknown analysis store!");
46 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
47   case NAME##Model: return CMDFLAG;
48 #include "clang/Frontend/Analyses.def"
49   }
50 }
51 
52 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
53   switch (Kind) {
54   default:
55     llvm_unreachable("Unknown analysis constraints!");
56 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
57   case NAME##Model: return CMDFLAG;
58 #include "clang/Frontend/Analyses.def"
59   }
60 }
61 
62 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
63   switch (Kind) {
64   default:
65     llvm_unreachable("Unknown analysis client!");
66 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
67   case PD_##NAME: return CMDFLAG;
68 #include "clang/Frontend/Analyses.def"
69   }
70 }
71 
72 //===----------------------------------------------------------------------===//
73 // Serialization (to args)
74 //===----------------------------------------------------------------------===//
75 
76 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
77                                std::vector<std::string> &Res) {
78   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
79     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
80   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
81     Res.push_back("-analyzer-store");
82     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
83   }
84   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
85     Res.push_back("-analyzer-constraints");
86     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
87   }
88   if (Opts.AnalysisDiagOpt != PD_HTML) {
89     Res.push_back("-analyzer-output");
90     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
91   }
92   if (!Opts.AnalyzeSpecificFunction.empty()) {
93     Res.push_back("-analyze-function");
94     Res.push_back(Opts.AnalyzeSpecificFunction);
95   }
96   if (Opts.AnalyzeAll)
97     Res.push_back("-analyzer-opt-analyze-headers");
98   if (Opts.AnalyzerDisplayProgress)
99     Res.push_back("-analyzer-display-progress");
100   if (Opts.AnalyzeNestedBlocks)
101     Res.push_back("-analyzer-opt-analyze-nested-blocks");
102   if (Opts.EagerlyAssume)
103     Res.push_back("-analyzer-eagerly-assume");
104   if (!Opts.PurgeDead)
105     Res.push_back("-analyzer-no-purge-dead");
106   if (Opts.TrimGraph)
107     Res.push_back("-trim-egraph");
108   if (Opts.VisualizeEGDot)
109     Res.push_back("-analyzer-viz-egraph-graphviz");
110   if (Opts.VisualizeEGDot)
111     Res.push_back("-analyzer-viz-egraph-ubigraph");
112   if (Opts.EnableExperimentalChecks)
113     Res.push_back("-analyzer-experimental-checks");
114   if (Opts.EnableExperimentalInternalChecks)
115     Res.push_back("-analyzer-experimental-internal-checks");
116   if (Opts.IdempotentOps)
117       Res.push_back("-analyzer-check-idempotent-operations");
118 }
119 
120 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
121                               std::vector<std::string> &Res) {
122   if (Opts.DebugInfo)
123     Res.push_back("-g");
124   if (Opts.DisableLLVMOpts)
125     Res.push_back("-disable-llvm-optzns");
126   if (Opts.DisableRedZone)
127     Res.push_back("-disable-red-zone");
128   if (!Opts.DwarfDebugFlags.empty()) {
129     Res.push_back("-dwarf-debug-flags");
130     Res.push_back(Opts.DwarfDebugFlags);
131   }
132   if (!Opts.MergeAllConstants)
133     Res.push_back("-fno-merge-all-constants");
134   if (Opts.NoCommon)
135     Res.push_back("-fno-common");
136   if (Opts.NoImplicitFloat)
137     Res.push_back("-no-implicit-float");
138   if (Opts.OmitLeafFramePointer)
139     Res.push_back("-momit-leaf-frame-pointer");
140   if (Opts.OptimizeSize) {
141     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
142     Res.push_back("-Os");
143   } else if (Opts.OptimizationLevel != 0)
144     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
145   if (!Opts.MainFileName.empty()) {
146     Res.push_back("-main-file-name");
147     Res.push_back(Opts.MainFileName);
148   }
149   // SimplifyLibCalls is only derived.
150   // TimePasses is only derived.
151   // UnitAtATime is unused.
152   // Inlining is only derived.
153 
154   // UnrollLoops is derived, but also accepts an option, no
155   // harm in pushing it back here.
156   if (Opts.UnrollLoops)
157     Res.push_back("-funroll-loops");
158   if (Opts.DataSections)
159     Res.push_back("-fdata-sections");
160   if (Opts.FunctionSections)
161     Res.push_back("-ffunction-sections");
162   if (Opts.AsmVerbose)
163     Res.push_back("-masm-verbose");
164   if (!Opts.CodeModel.empty()) {
165     Res.push_back("-mcode-model");
166     Res.push_back(Opts.CodeModel);
167   }
168   if (!Opts.CXAAtExit)
169     Res.push_back("-fno-use-cxa-atexit");
170   if (Opts.CXXCtorDtorAliases)
171     Res.push_back("-mconstructor-aliases");
172   if (!Opts.DebugPass.empty()) {
173     Res.push_back("-mdebug-pass");
174     Res.push_back(Opts.DebugPass);
175   }
176   if (Opts.DisableFPElim)
177     Res.push_back("-mdisable-fp-elim");
178   if (!Opts.FloatABI.empty()) {
179     Res.push_back("-mfloat-abi");
180     Res.push_back(Opts.FloatABI);
181   }
182   if (!Opts.LimitFloatPrecision.empty()) {
183     Res.push_back("-mlimit-float-precision");
184     Res.push_back(Opts.LimitFloatPrecision);
185   }
186   if (Opts.NoZeroInitializedInBSS)
187     Res.push_back("-mno-zero-initialized-bss");
188   switch (Opts.getObjCDispatchMethod()) {
189   case CodeGenOptions::Legacy:
190     break;
191   case CodeGenOptions::Mixed:
192     Res.push_back("-fobjc-dispatch-method=mixed");
193     break;
194   case CodeGenOptions::NonLegacy:
195     Res.push_back("-fobjc-dispatch-method=non-legacy");
196     break;
197   }
198   if (Opts.RelaxAll)
199     Res.push_back("-mrelax-all");
200   if (Opts.SoftFloat)
201     Res.push_back("-msoft-float");
202   if (Opts.UnwindTables)
203     Res.push_back("-munwind-tables");
204   if (Opts.RelocationModel != "pic") {
205     Res.push_back("-mrelocation-model");
206     Res.push_back(Opts.RelocationModel);
207   }
208   if (!Opts.VerifyModule)
209     Res.push_back("-disable-llvm-verifier");
210 }
211 
212 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
213                                        std::vector<std::string> &Res) {
214   if (Opts.IncludeSystemHeaders)
215     Res.push_back("-sys-header-deps");
216   if (Opts.UsePhonyTargets)
217     Res.push_back("-MP");
218   if (!Opts.OutputFile.empty()) {
219     Res.push_back("-dependency-file");
220     Res.push_back(Opts.OutputFile);
221   }
222   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
223     Res.push_back("-MT");
224     Res.push_back(Opts.Targets[i]);
225   }
226 }
227 
228 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
229                                  std::vector<std::string> &Res) {
230   if (Opts.IgnoreWarnings)
231     Res.push_back("-w");
232   if (Opts.NoRewriteMacros)
233     Res.push_back("-Wno-rewrite-macros");
234   if (Opts.Pedantic)
235     Res.push_back("-pedantic");
236   if (Opts.PedanticErrors)
237     Res.push_back("-pedantic-errors");
238   if (!Opts.ShowColumn)
239     Res.push_back("-fno-show-column");
240   if (!Opts.ShowLocation)
241     Res.push_back("-fno-show-source-location");
242   if (!Opts.ShowCarets)
243     Res.push_back("-fno-caret-diagnostics");
244   if (!Opts.ShowFixits)
245     Res.push_back("-fno-diagnostics-fixit-info");
246   if (Opts.ShowSourceRanges)
247     Res.push_back("-fdiagnostics-print-source-range-info");
248   if (Opts.ShowParseableFixits)
249     Res.push_back("-fdiagnostics-parseable-fixits");
250   if (Opts.ShowColors)
251     Res.push_back("-fcolor-diagnostics");
252   if (Opts.VerifyDiagnostics)
253     Res.push_back("-verify");
254   if (Opts.BinaryOutput)
255     Res.push_back("-fdiagnostics-binary");
256   if (Opts.ShowOptionNames)
257     Res.push_back("-fdiagnostics-show-option");
258   if (Opts.ShowCategories == 1)
259     Res.push_back("-fdiagnostics-show-category=id");
260   else if (Opts.ShowCategories == 2)
261     Res.push_back("-fdiagnostics-show-category=name");
262   if (Opts.ErrorLimit) {
263     Res.push_back("-ferror-limit");
264     Res.push_back(llvm::utostr(Opts.ErrorLimit));
265   }
266   if (Opts.MacroBacktraceLimit
267                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
268     Res.push_back("-fmacro-backtrace-limit");
269     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
270   }
271   if (Opts.TemplateBacktraceLimit
272                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
273     Res.push_back("-ftemplate-backtrace-limit");
274     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
275   }
276 
277   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
278     Res.push_back("-ftabstop");
279     Res.push_back(llvm::utostr(Opts.TabStop));
280   }
281   if (Opts.MessageLength) {
282     Res.push_back("-fmessage-length");
283     Res.push_back(llvm::utostr(Opts.MessageLength));
284   }
285   if (!Opts.DumpBuildInformation.empty()) {
286     Res.push_back("-dump-build-information");
287     Res.push_back(Opts.DumpBuildInformation);
288   }
289   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
290     Res.push_back("-W" + Opts.Warnings[i]);
291 }
292 
293 static const char *getInputKindName(InputKind Kind) {
294   switch (Kind) {
295   case IK_None:              break;
296   case IK_AST:               return "ast";
297   case IK_Asm:               return "assembler-with-cpp";
298   case IK_C:                 return "c";
299   case IK_CXX:               return "c++";
300   case IK_LLVM_IR:           return "ir";
301   case IK_ObjC:              return "objective-c";
302   case IK_ObjCXX:            return "objective-c++";
303   case IK_OpenCL:            return "cl";
304   case IK_PreprocessedC:     return "cpp-output";
305   case IK_PreprocessedCXX:   return "c++-cpp-output";
306   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
307   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
308   }
309 
310   llvm_unreachable("Unexpected language kind!");
311   return 0;
312 }
313 
314 static const char *getActionName(frontend::ActionKind Kind) {
315   switch (Kind) {
316   case frontend::PluginAction:
317   case frontend::InheritanceView:
318     llvm_unreachable("Invalid kind!");
319 
320   case frontend::ASTDump:                return "-ast-dump";
321   case frontend::ASTPrint:               return "-ast-print";
322   case frontend::ASTPrintXML:            return "-ast-print-xml";
323   case frontend::ASTView:                return "-ast-view";
324   case frontend::BoostCon:               return "-boostcon";
325   case frontend::CreateModule:           return "-create-module";
326   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
327   case frontend::DumpTokens:             return "-dump-tokens";
328   case frontend::EmitAssembly:           return "-S";
329   case frontend::EmitBC:                 return "-emit-llvm-bc";
330   case frontend::EmitHTML:               return "-emit-html";
331   case frontend::EmitLLVM:               return "-emit-llvm";
332   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
333   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
334   case frontend::EmitObj:                return "-emit-obj";
335   case frontend::FixIt:                  return "-fixit";
336   case frontend::GeneratePCH:            return "-emit-pch";
337   case frontend::GeneratePTH:            return "-emit-pth";
338   case frontend::InitOnly:               return "-init-only";
339   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
340   case frontend::PrintDeclContext:       return "-print-decl-contexts";
341   case frontend::PrintPreamble:          return "-print-preamble";
342   case frontend::PrintPreprocessedInput: return "-E";
343   case frontend::RewriteMacros:          return "-rewrite-macros";
344   case frontend::RewriteObjC:            return "-rewrite-objc";
345   case frontend::RewriteTest:            return "-rewrite-test";
346   case frontend::RunAnalysis:            return "-analyze";
347   case frontend::RunPreprocessorOnly:    return "-Eonly";
348   }
349 
350   llvm_unreachable("Unexpected language kind!");
351   return 0;
352 }
353 
354 static void FrontendOptsToArgs(const FrontendOptions &Opts,
355                                std::vector<std::string> &Res) {
356   if (!Opts.DebugCodeCompletionPrinter)
357     Res.push_back("-no-code-completion-debug-printer");
358   if (Opts.DisableFree)
359     Res.push_back("-disable-free");
360   if (Opts.RelocatablePCH)
361     Res.push_back("-relocatable-pch");
362   if (Opts.ChainedPCH)
363     Res.push_back("-chained-pch");
364   if (Opts.ShowHelp)
365     Res.push_back("-help");
366   if (Opts.ShowMacrosInCodeCompletion)
367     Res.push_back("-code-completion-macros");
368   if (Opts.ShowCodePatternsInCodeCompletion)
369     Res.push_back("-code-completion-patterns");
370   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
371     Res.push_back("-no-code-completion-globals");
372   if (Opts.ShowStats)
373     Res.push_back("-print-stats");
374   if (Opts.ShowTimers)
375     Res.push_back("-ftime-report");
376   if (Opts.ShowVersion)
377     Res.push_back("-version");
378   if (Opts.FixWhatYouCan)
379     Res.push_back("-fix-what-you-can");
380 
381   bool NeedLang = false;
382   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
383     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
384         Opts.Inputs[i].first)
385       NeedLang = true;
386   if (NeedLang) {
387     Res.push_back("-x");
388     Res.push_back(getInputKindName(Opts.Inputs[0].first));
389   }
390   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
391     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
392            "Unable to represent this input vector!");
393     Res.push_back(Opts.Inputs[i].second);
394   }
395 
396   if (!Opts.OutputFile.empty()) {
397     Res.push_back("-o");
398     Res.push_back(Opts.OutputFile);
399   }
400   if (!Opts.ViewClassInheritance.empty()) {
401     Res.push_back("-cxx-inheritance-view");
402     Res.push_back(Opts.ViewClassInheritance);
403   }
404   if (!Opts.CodeCompletionAt.FileName.empty()) {
405     Res.push_back("-code-completion-at");
406     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
407                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
408                   llvm::utostr(Opts.CodeCompletionAt.Column));
409   }
410   if (Opts.ProgramAction != frontend::InheritanceView &&
411       Opts.ProgramAction != frontend::PluginAction)
412     Res.push_back(getActionName(Opts.ProgramAction));
413   if (!Opts.ActionName.empty()) {
414     Res.push_back("-plugin");
415     Res.push_back(Opts.ActionName);
416     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
417       Res.push_back("-plugin-arg-" + Opts.ActionName);
418       Res.push_back(Opts.PluginArgs[i]);
419     }
420   }
421   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
422     Res.push_back("-load");
423     Res.push_back(Opts.Plugins[i]);
424   }
425   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
426     Res.push_back("-ast-merge");
427     Res.push_back(Opts.ASTMergeFiles[i]);
428   }
429   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
430     Res.push_back("-import-module");
431     Res.push_back(Opts.Modules[i]);
432   }
433   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
434     Res.push_back("-mllvm");
435     Res.push_back(Opts.LLVMArgs[i]);
436   }
437 }
438 
439 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
440                                    std::vector<std::string> &Res) {
441   if (Opts.Sysroot != "/") {
442     Res.push_back("-isysroot");
443     Res.push_back(Opts.Sysroot);
444   }
445 
446   /// User specified include entries.
447   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
448     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
449     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
450       llvm::report_fatal_error("Invalid option set!");
451     if (E.IsUserSupplied) {
452       if (E.Group == frontend::After) {
453         Res.push_back("-idirafter");
454       } else if (E.Group == frontend::Quoted) {
455         Res.push_back("-iquote");
456       } else if (E.Group == frontend::System) {
457         Res.push_back("-isystem");
458       } else {
459         assert(E.Group == frontend::Angled && "Invalid group!");
460         Res.push_back(E.IsFramework ? "-F" : "-I");
461       }
462     } else {
463       if (E.Group != frontend::Angled && E.Group != frontend::System)
464         llvm::report_fatal_error("Invalid option set!");
465       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
466                     "-iwithprefix");
467     }
468     Res.push_back(E.Path);
469   }
470 
471   if (!Opts.EnvIncPath.empty()) {
472     // FIXME: Provide an option for this, and move env detection to driver.
473     llvm::report_fatal_error("Not yet implemented!");
474   }
475   if (!Opts.CEnvIncPath.empty()) {
476     // FIXME: Provide an option for this, and move env detection to driver.
477     llvm::report_fatal_error("Not yet implemented!");
478   }
479   if (!Opts.ObjCEnvIncPath.empty()) {
480     // FIXME: Provide an option for this, and move env detection to driver.
481     llvm::report_fatal_error("Not yet implemented!");
482   }
483   if (!Opts.CXXEnvIncPath.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.ObjCXXEnvIncPath.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.ResourceDir.empty()) {
492     Res.push_back("-resource-dir");
493     Res.push_back(Opts.ResourceDir);
494   }
495   if (!Opts.UseStandardIncludes)
496     Res.push_back("-nostdinc");
497   if (!Opts.UseStandardCXXIncludes)
498     Res.push_back("-nostdinc++");
499   if (Opts.Verbose)
500     Res.push_back("-v");
501 }
502 
503 static void LangOptsToArgs(const LangOptions &Opts,
504                            std::vector<std::string> &Res) {
505   LangOptions DefaultLangOpts;
506 
507   // FIXME: Need to set -std to get all the implicit options.
508 
509   // FIXME: We want to only pass options relative to the defaults, which
510   // requires constructing a target. :(
511   //
512   // It would be better to push the all target specific choices into the driver,
513   // so that everything below that was more uniform.
514 
515   if (Opts.Trigraphs)
516     Res.push_back("-trigraphs");
517   // Implicit based on the input kind:
518   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
519   // Implicit based on the input language standard:
520   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
521   if (Opts.DollarIdents)
522     Res.push_back("-fdollars-in-identifiers");
523   if (Opts.GNUMode && !Opts.GNUKeywords)
524     Res.push_back("-fno-gnu-keywords");
525   if (!Opts.GNUMode && Opts.GNUKeywords)
526     Res.push_back("-fgnu-keywords");
527   if (Opts.Microsoft)
528     Res.push_back("-fms-extensions");
529   if (Opts.Borland)
530     Res.push_back("-fborland-extensions");
531   if (Opts.ObjCNonFragileABI)
532     Res.push_back("-fobjc-nonfragile-abi");
533   if (Opts.ObjCNonFragileABI2)
534     Res.push_back("-fobjc-nonfragile-abi2");
535   // NoInline is implicit.
536   if (!Opts.CXXOperatorNames)
537     Res.push_back("-fno-operator-names");
538   if (Opts.PascalStrings)
539     Res.push_back("-fpascal-strings");
540   if (Opts.CatchUndefined)
541     Res.push_back("-fcatch-undefined-behavior");
542   if (Opts.WritableStrings)
543     Res.push_back("-fwritable-strings");
544   if (Opts.ConstStrings)
545     Res.push_back("-Wwrite-strings");
546   if (!Opts.LaxVectorConversions)
547     Res.push_back("-fno-lax-vector-conversions");
548   if (Opts.AltiVec)
549     Res.push_back("-faltivec");
550   if (Opts.Exceptions)
551     Res.push_back("-fexceptions");
552   if (Opts.SjLjExceptions)
553     Res.push_back("-fsjlj-exceptions");
554   if (!Opts.RTTI)
555     Res.push_back("-fno-rtti");
556   if (!Opts.NeXTRuntime)
557     Res.push_back("-fgnu-runtime");
558   if (Opts.Freestanding)
559     Res.push_back("-ffreestanding");
560   if (Opts.NoBuiltin)
561     Res.push_back("-fno-builtin");
562   if (!Opts.AssumeSaneOperatorNew)
563     Res.push_back("-fno-assume-sane-operator-new");
564   if (!Opts.ThreadsafeStatics)
565     Res.push_back("-fno-threadsafe-statics");
566   if (Opts.POSIXThreads)
567     Res.push_back("-pthread");
568   if (Opts.Blocks)
569     Res.push_back("-fblocks");
570   if (Opts.EmitAllDecls)
571     Res.push_back("-femit-all-decls");
572   if (Opts.MathErrno)
573     Res.push_back("-fmath-errno");
574   switch (Opts.getSignedOverflowBehavior()) {
575   case LangOptions::SOB_Undefined: break;
576   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
577   case LangOptions::SOB_Trapping:  Res.push_back("-ftrapv"); break;
578   }
579   if (Opts.HeinousExtensions)
580     Res.push_back("-fheinous-gnu-extensions");
581   // Optimize is implicit.
582   // OptimizeSize is implicit.
583   if (Opts.Static)
584     Res.push_back("-static-define");
585   if (Opts.DumpRecordLayouts)
586     Res.push_back("-fdump-record-layouts");
587   if (Opts.DumpVTableLayouts)
588     Res.push_back("-fdump-vtable-layouts");
589   if (Opts.NoBitFieldTypeAlign)
590     Res.push_back("-fno-bitfield-type-alignment");
591   if (Opts.SjLjExceptions)
592     Res.push_back("-fsjlj-exceptions");
593   if (Opts.PICLevel) {
594     Res.push_back("-pic-level");
595     Res.push_back(llvm::utostr(Opts.PICLevel));
596   }
597   if (Opts.ObjCGCBitmapPrint)
598     Res.push_back("-print-ivar-layout");
599   if (Opts.NoConstantCFStrings)
600     Res.push_back("-fno-constant-cfstrings");
601   if (!Opts.AccessControl)
602     Res.push_back("-fno-access-control");
603   if (!Opts.CharIsSigned)
604     Res.push_back("-fno-signed-char");
605   if (Opts.ShortWChar)
606     Res.push_back("-fshort-wchar");
607   if (!Opts.ElideConstructors)
608     Res.push_back("-fno-elide-constructors");
609   if (Opts.getGCMode() != LangOptions::NonGC) {
610     if (Opts.getGCMode() == LangOptions::HybridGC) {
611       Res.push_back("-fobjc-gc");
612     } else {
613       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
614       Res.push_back("-fobjc-gc-only");
615     }
616   }
617   if (Opts.getVisibilityMode() != LangOptions::Default) {
618     Res.push_back("-fvisibility");
619     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
620       Res.push_back("hidden");
621     } else {
622       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
623              "Invalid visibility!");
624       Res.push_back("protected");
625     }
626   }
627   if (Opts.InlineVisibilityHidden)
628     Res.push_back("-fvisibility-inlines-hidden");
629 
630   if (Opts.getStackProtectorMode() != 0) {
631     Res.push_back("-stack-protector");
632     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
633   }
634   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
635     Res.push_back("-ftemplate-depth");
636     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
637   }
638   if (!Opts.ObjCConstantStringClass.empty()) {
639     Res.push_back("-fconstant-string-class");
640     Res.push_back(Opts.ObjCConstantStringClass);
641   }
642 }
643 
644 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
645                                    std::vector<std::string> &Res) {
646   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
647     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
648                   Opts.Macros[i].first);
649   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
650     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
651     Res.push_back("-include");
652     Res.push_back(Opts.Includes[i]);
653   }
654   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
655     Res.push_back("-imacros");
656     Res.push_back(Opts.MacroIncludes[i]);
657   }
658   if (!Opts.UsePredefines)
659     Res.push_back("-undef");
660   if (Opts.DetailedRecord)
661     Res.push_back("-detailed-preprocessing-record");
662   if (!Opts.ImplicitPCHInclude.empty()) {
663     Res.push_back("-include-pch");
664     Res.push_back(Opts.ImplicitPCHInclude);
665   }
666   if (!Opts.ImplicitPTHInclude.empty()) {
667     Res.push_back("-include-pth");
668     Res.push_back(Opts.ImplicitPTHInclude);
669   }
670   if (!Opts.TokenCache.empty()) {
671     if (Opts.ImplicitPTHInclude.empty()) {
672       Res.push_back("-token-cache");
673       Res.push_back(Opts.TokenCache);
674     } else
675       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
676              "Unsupported option combination!");
677   }
678   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
679     Res.push_back("-remap-file");
680     Res.push_back(Opts.RemappedFiles[i].first + ";" +
681                   Opts.RemappedFiles[i].second);
682   }
683 }
684 
685 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
686                                          std::vector<std::string> &Res) {
687   if (!Opts.ShowCPP && !Opts.ShowMacros)
688     llvm::report_fatal_error("Invalid option combination!");
689 
690   if (Opts.ShowCPP && Opts.ShowMacros)
691     Res.push_back("-dD");
692   else if (!Opts.ShowCPP && Opts.ShowMacros)
693     Res.push_back("-dM");
694 
695   if (Opts.ShowHeaderIncludes)
696     Res.push_back("-H");
697   if (!Opts.ShowLineMarkers)
698     Res.push_back("-P");
699   if (Opts.ShowComments)
700     Res.push_back("-C");
701   if (Opts.ShowMacroComments)
702     Res.push_back("-CC");
703 }
704 
705 static void TargetOptsToArgs(const TargetOptions &Opts,
706                              std::vector<std::string> &Res) {
707   Res.push_back("-triple");
708   Res.push_back(Opts.Triple);
709   if (!Opts.CPU.empty()) {
710     Res.push_back("-target-cpu");
711     Res.push_back(Opts.CPU);
712   }
713   if (!Opts.ABI.empty()) {
714     Res.push_back("-target-abi");
715     Res.push_back(Opts.ABI);
716   }
717   if (!Opts.LinkerVersion.empty()) {
718     Res.push_back("-target-linker-version");
719     Res.push_back(Opts.LinkerVersion);
720   }
721   if (!Opts.CXXABI.empty()) {
722     Res.push_back("-cxx-abi");
723     Res.push_back(Opts.CXXABI);
724   }
725   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
726     Res.push_back("-target-feature");
727     Res.push_back(Opts.Features[i]);
728   }
729 }
730 
731 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
732   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
733   CodeGenOptsToArgs(getCodeGenOpts(), Res);
734   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
735   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
736   FrontendOptsToArgs(getFrontendOpts(), Res);
737   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
738   LangOptsToArgs(getLangOpts(), Res);
739   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
740   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
741   TargetOptsToArgs(getTargetOpts(), Res);
742 }
743 
744 //===----------------------------------------------------------------------===//
745 // Deserialization (to args)
746 //===----------------------------------------------------------------------===//
747 
748 using namespace clang::driver;
749 using namespace clang::driver::cc1options;
750 
751 //
752 
753 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
754                               Diagnostic &Diags) {
755   using namespace cc1options;
756 
757   Opts.AnalysisList.clear();
758 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
759   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
760 #include "clang/Frontend/Analyses.def"
761 
762   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
763     llvm::StringRef Name = A->getValue(Args);
764     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
765 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
766       .Case(CMDFLAG, NAME##Model)
767 #include "clang/Frontend/Analyses.def"
768       .Default(NumStores);
769     // FIXME: Error handling.
770     if (Value == NumStores)
771       Diags.Report(diag::err_drv_invalid_value)
772         << A->getAsString(Args) << Name;
773     else
774       Opts.AnalysisStoreOpt = Value;
775   }
776 
777   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
778     llvm::StringRef Name = A->getValue(Args);
779     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
780 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
781       .Case(CMDFLAG, NAME##Model)
782 #include "clang/Frontend/Analyses.def"
783       .Default(NumConstraints);
784     // FIXME: Error handling.
785     if (Value == NumConstraints)
786       Diags.Report(diag::err_drv_invalid_value)
787         << A->getAsString(Args) << Name;
788     else
789       Opts.AnalysisConstraintsOpt = Value;
790   }
791 
792   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
793     llvm::StringRef Name = A->getValue(Args);
794     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
795 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
796       .Case(CMDFLAG, PD_##NAME)
797 #include "clang/Frontend/Analyses.def"
798       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
799     // FIXME: Error handling.
800     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
801       Diags.Report(diag::err_drv_invalid_value)
802         << A->getAsString(Args) << Name;
803     else
804       Opts.AnalysisDiagOpt = Value;
805   }
806 
807   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
808   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
809   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
810   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
811   Opts.AnalyzeNestedBlocks =
812     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
813   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
814   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
815   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
816   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
817   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
818   Opts.EnableExperimentalInternalChecks =
819     Args.hasArg(OPT_analyzer_experimental_internal_checks);
820   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
821   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
822   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 3, Diags);
823   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
824   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
825 }
826 
827 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
828                              Diagnostic &Diags) {
829   using namespace cc1options;
830   // -Os implies -O2
831   if (Args.hasArg(OPT_Os))
832     Opts.OptimizationLevel = 2;
833   else {
834     Opts.OptimizationLevel = Args.getLastArgIntValue(OPT_O, 0, Diags);
835     if (Opts.OptimizationLevel > 3) {
836       Diags.Report(diag::err_drv_invalid_value)
837         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
838       Opts.OptimizationLevel = 3;
839     }
840   }
841 
842   // We must always run at least the always inlining pass.
843   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
844     : CodeGenOptions::OnlyAlwaysInlining;
845 
846   Opts.DebugInfo = Args.hasArg(OPT_g);
847   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
848   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
849   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
850   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
851   Opts.NoCommon = Args.hasArg(OPT_fno_common);
852   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
853   Opts.OptimizeSize = Args.hasArg(OPT_Os);
854   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
855                             Args.hasArg(OPT_ffreestanding));
856   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
857                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
858 
859   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
860   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
861   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
862   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
863   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
864   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
865   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
866   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
867   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
868   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
869   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
870   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
871   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
872   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
873   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
874 
875   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
876   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
877 
878   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
879   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
880 
881   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
882 
883   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
884     llvm::StringRef Name = A->getValue(Args);
885     unsigned Method = llvm::StringSwitch<unsigned>(Name)
886       .Case("legacy", CodeGenOptions::Legacy)
887       .Case("non-legacy", CodeGenOptions::NonLegacy)
888       .Case("mixed", CodeGenOptions::Mixed)
889       .Default(~0U);
890     if (Method == ~0U)
891       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
892     else
893       Opts.ObjCDispatchMethod = Method;
894   }
895 }
896 
897 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
898                                       ArgList &Args) {
899   using namespace cc1options;
900   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
901   Opts.Targets = Args.getAllArgValues(OPT_MT);
902   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
903   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
904 }
905 
906 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
907                                 Diagnostic &Diags) {
908   using namespace cc1options;
909   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
910   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
911   Opts.Pedantic = Args.hasArg(OPT_pedantic);
912   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
913   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
914   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
915   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
916   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
917   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
918   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
919 
920   llvm::StringRef ShowOverloads =
921     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
922   if (ShowOverloads == "best")
923     Opts.ShowOverloads = Diagnostic::Ovl_Best;
924   else if (ShowOverloads == "all")
925     Opts.ShowOverloads = Diagnostic::Ovl_All;
926   else
927     Diags.Report(diag::err_drv_invalid_value)
928       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
929       << ShowOverloads;
930 
931   llvm::StringRef ShowCategory =
932     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
933   if (ShowCategory == "none")
934     Opts.ShowCategories = 0;
935   else if (ShowCategory == "id")
936     Opts.ShowCategories = 1;
937   else if (ShowCategory == "name")
938     Opts.ShowCategories = 2;
939   else
940     Diags.Report(diag::err_drv_invalid_value)
941       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
942       << ShowCategory;
943 
944   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
945   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
946   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
947   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
948   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
949   Opts.MacroBacktraceLimit
950     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
951                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
952   Opts.TemplateBacktraceLimit
953     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
954                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
955                          Diags);
956   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
957                                     DiagnosticOptions::DefaultTabStop, Diags);
958   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
959     Diags.Report(diag::warn_ignoring_ftabstop_value)
960       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
961     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
962   }
963   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
964   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
965   Opts.Warnings = Args.getAllArgValues(OPT_W);
966 }
967 
968 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
969                                    Diagnostic &Diags) {
970   using namespace cc1options;
971   Opts.ProgramAction = frontend::ParseSyntaxOnly;
972   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
973     switch (A->getOption().getID()) {
974     default:
975       assert(0 && "Invalid option in group!");
976     case OPT_ast_dump:
977       Opts.ProgramAction = frontend::ASTDump; break;
978     case OPT_ast_print:
979       Opts.ProgramAction = frontend::ASTPrint; break;
980     case OPT_ast_print_xml:
981       Opts.ProgramAction = frontend::ASTPrintXML; break;
982     case OPT_ast_view:
983       Opts.ProgramAction = frontend::ASTView; break;
984     case OPT_boostcon:
985       Opts.ProgramAction = frontend::BoostCon; break;
986     case OPT_dump_raw_tokens:
987       Opts.ProgramAction = frontend::DumpRawTokens; break;
988     case OPT_dump_tokens:
989       Opts.ProgramAction = frontend::DumpTokens; break;
990     case OPT_S:
991       Opts.ProgramAction = frontend::EmitAssembly; break;
992     case OPT_emit_llvm_bc:
993       Opts.ProgramAction = frontend::EmitBC; break;
994     case OPT_emit_html:
995       Opts.ProgramAction = frontend::EmitHTML; break;
996     case OPT_emit_llvm:
997       Opts.ProgramAction = frontend::EmitLLVM; break;
998     case OPT_emit_llvm_only:
999       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1000     case OPT_emit_codegen_only:
1001       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1002     case OPT_emit_obj:
1003       Opts.ProgramAction = frontend::EmitObj; break;
1004     case OPT_fixit_EQ:
1005       Opts.FixItSuffix = A->getValue(Args);
1006       // fall-through!
1007     case OPT_fixit:
1008       Opts.ProgramAction = frontend::FixIt; break;
1009     case OPT_emit_pch:
1010       Opts.ProgramAction = frontend::GeneratePCH; break;
1011     case OPT_emit_pth:
1012       Opts.ProgramAction = frontend::GeneratePTH; break;
1013     case OPT_init_only:
1014       Opts.ProgramAction = frontend::InitOnly; break;
1015     case OPT_fsyntax_only:
1016       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1017     case OPT_print_decl_contexts:
1018       Opts.ProgramAction = frontend::PrintDeclContext; break;
1019     case OPT_print_preamble:
1020       Opts.ProgramAction = frontend::PrintPreamble; break;
1021     case OPT_E:
1022       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1023     case OPT_rewrite_macros:
1024       Opts.ProgramAction = frontend::RewriteMacros; break;
1025     case OPT_rewrite_objc:
1026       Opts.ProgramAction = frontend::RewriteObjC; break;
1027     case OPT_rewrite_test:
1028       Opts.ProgramAction = frontend::RewriteTest; break;
1029     case OPT_analyze:
1030       Opts.ProgramAction = frontend::RunAnalysis; break;
1031     case OPT_Eonly:
1032       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1033     case OPT_create_module:
1034       Opts.ProgramAction = frontend::CreateModule; break;
1035     }
1036   }
1037 
1038   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1039     Opts.Plugins.push_back(A->getValue(Args,0));
1040     Opts.ProgramAction = frontend::PluginAction;
1041     Opts.ActionName = A->getValue(Args);
1042 
1043     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1044            end = Args.filtered_end(); it != end; ++it) {
1045       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1046         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1047     }
1048   }
1049 
1050   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1051     Opts.CodeCompletionAt =
1052       ParsedSourceLocation::FromString(A->getValue(Args));
1053     if (Opts.CodeCompletionAt.FileName.empty())
1054       Diags.Report(diag::err_drv_invalid_value)
1055         << A->getAsString(Args) << A->getValue(Args);
1056   }
1057   Opts.DebugCodeCompletionPrinter =
1058     !Args.hasArg(OPT_no_code_completion_debug_printer);
1059   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1060 
1061   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1062   Opts.Plugins = Args.getAllArgValues(OPT_load);
1063   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1064   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1065   Opts.ShowHelp = Args.hasArg(OPT_help);
1066   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1067   Opts.ShowCodePatternsInCodeCompletion
1068     = Args.hasArg(OPT_code_completion_patterns);
1069   Opts.ShowGlobalSymbolsInCodeCompletion
1070     = !Args.hasArg(OPT_no_code_completion_globals);
1071   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1072   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1073   Opts.ShowVersion = Args.hasArg(OPT_version);
1074   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1075   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1076   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1077   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1078   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1079 
1080   InputKind DashX = IK_None;
1081   if (const Arg *A = Args.getLastArg(OPT_x)) {
1082     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1083       .Case("c", IK_C)
1084       .Case("cl", IK_OpenCL)
1085       .Case("c", IK_C)
1086       .Case("cl", IK_OpenCL)
1087       .Case("c++", IK_CXX)
1088       .Case("objective-c", IK_ObjC)
1089       .Case("objective-c++", IK_ObjCXX)
1090       .Case("cpp-output", IK_PreprocessedC)
1091       .Case("assembler-with-cpp", IK_Asm)
1092       .Case("c++-cpp-output", IK_PreprocessedCXX)
1093       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1094       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1095       .Case("c-header", IK_C)
1096       .Case("objective-c-header", IK_ObjC)
1097       .Case("c++-header", IK_CXX)
1098       .Case("objective-c++-header", IK_ObjCXX)
1099       .Case("ast", IK_AST)
1100       .Case("ir", IK_LLVM_IR)
1101       .Default(IK_None);
1102     if (DashX == IK_None)
1103       Diags.Report(diag::err_drv_invalid_value)
1104         << A->getAsString(Args) << A->getValue(Args);
1105   }
1106 
1107   // '-' is the default input if none is given.
1108   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1109   Opts.Inputs.clear();
1110   if (Inputs.empty())
1111     Inputs.push_back("-");
1112   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1113     InputKind IK = DashX;
1114     if (IK == IK_None) {
1115       IK = FrontendOptions::getInputKindForExtension(
1116         llvm::StringRef(Inputs[i]).rsplit('.').second);
1117       // FIXME: Remove this hack.
1118       if (i == 0)
1119         DashX = IK;
1120     }
1121     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1122   }
1123 
1124   return DashX;
1125 }
1126 
1127 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1128                                                  void *MainAddr) {
1129   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1130 
1131   if (!P.isEmpty()) {
1132     P.eraseComponent();  // Remove /clang from foo/bin/clang
1133     P.eraseComponent();  // Remove /bin   from foo/bin
1134 
1135     // Get foo/lib/clang/<version>/include
1136     P.appendComponent("lib");
1137     P.appendComponent("clang");
1138     P.appendComponent(CLANG_VERSION_STRING);
1139   }
1140 
1141   return P.str();
1142 }
1143 
1144 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1145   using namespace cc1options;
1146   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1147   Opts.Verbose = Args.hasArg(OPT_v);
1148   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1149   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1150   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1151   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1152 
1153   // Add -I... and -F... options in order.
1154   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1155          ie = Args.filtered_end(); it != ie; ++it)
1156     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1157                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1158 
1159   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1160   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1161   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1162                                              OPT_iwithprefixbefore),
1163          ie = Args.filtered_end(); it != ie; ++it) {
1164     const Arg *A = *it;
1165     if (A->getOption().matches(OPT_iprefix))
1166       Prefix = A->getValue(Args);
1167     else if (A->getOption().matches(OPT_iwithprefix))
1168       Opts.AddPath(Prefix.str() + A->getValue(Args),
1169                    frontend::System, false, false, true);
1170     else
1171       Opts.AddPath(Prefix.str() + A->getValue(Args),
1172                    frontend::Angled, false, false, true);
1173   }
1174 
1175   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1176          ie = Args.filtered_end(); it != ie; ++it)
1177     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1178   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1179          ie = Args.filtered_end(); it != ie; ++it)
1180     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1181   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1182          ie = Args.filtered_end(); it != ie; ++it)
1183     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1184                  (*it)->getOption().matches(OPT_iwithsysroot));
1185 
1186   // FIXME: Need options for the various environment variables!
1187 }
1188 
1189 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1190                           Diagnostic &Diags) {
1191   // FIXME: Cleanup per-file based stuff.
1192 
1193   // Set some properties which depend soley on the input kind; it would be nice
1194   // to move these to the language standard, and have the driver resolve the
1195   // input kind + language standard.
1196   if (IK == IK_Asm) {
1197     Opts.AsmPreprocessor = 1;
1198   } else if (IK == IK_ObjC ||
1199              IK == IK_ObjCXX ||
1200              IK == IK_PreprocessedObjC ||
1201              IK == IK_PreprocessedObjCXX) {
1202     Opts.ObjC1 = Opts.ObjC2 = 1;
1203   }
1204 
1205   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1206   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1207     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1208 #define LANGSTANDARD(id, name, desc, features) \
1209       .Case(name, LangStandard::lang_##id)
1210 #include "clang/Frontend/LangStandards.def"
1211       .Default(LangStandard::lang_unspecified);
1212     if (LangStd == LangStandard::lang_unspecified)
1213       Diags.Report(diag::err_drv_invalid_value)
1214         << A->getAsString(Args) << A->getValue(Args);
1215   }
1216 
1217   if (LangStd == LangStandard::lang_unspecified) {
1218     // Based on the base language, pick one.
1219     switch (IK) {
1220     case IK_None:
1221     case IK_AST:
1222     case IK_LLVM_IR:
1223       assert(0 && "Invalid input kind!");
1224     case IK_OpenCL:
1225       LangStd = LangStandard::lang_opencl;
1226       break;
1227     case IK_Asm:
1228     case IK_C:
1229     case IK_PreprocessedC:
1230     case IK_ObjC:
1231     case IK_PreprocessedObjC:
1232       LangStd = LangStandard::lang_gnu99;
1233       break;
1234     case IK_CXX:
1235     case IK_PreprocessedCXX:
1236     case IK_ObjCXX:
1237     case IK_PreprocessedObjCXX:
1238       LangStd = LangStandard::lang_gnucxx98;
1239       break;
1240     }
1241   }
1242 
1243   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1244   Opts.BCPLComment = Std.hasBCPLComments();
1245   Opts.C99 = Std.isC99();
1246   Opts.CPlusPlus = Std.isCPlusPlus();
1247   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1248   Opts.Digraphs = Std.hasDigraphs();
1249   Opts.GNUMode = Std.isGNUMode();
1250   Opts.GNUInline = !Std.isC99();
1251   Opts.HexFloats = Std.hasHexFloats();
1252   Opts.ImplicitInt = Std.hasImplicitInt();
1253 
1254   // OpenCL has some additional defaults.
1255   if (LangStd == LangStandard::lang_opencl) {
1256     Opts.OpenCL = 1;
1257     Opts.AltiVec = 1;
1258     Opts.CXXOperatorNames = 1;
1259     Opts.LaxVectorConversions = 1;
1260   }
1261 
1262   // OpenCL and C++ both have bool, true, false keywords.
1263   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1264 
1265   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1266   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1267   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1268   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1269   // name, as it doesn't seem a useful distinction.
1270   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1271                                   Opts.GNUMode);
1272 
1273   if (Opts.CPlusPlus)
1274     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1275 
1276   if (Args.hasArg(OPT_fobjc_gc_only))
1277     Opts.setGCMode(LangOptions::GCOnly);
1278   else if (Args.hasArg(OPT_fobjc_gc))
1279     Opts.setGCMode(LangOptions::HybridGC);
1280 
1281   if (Args.hasArg(OPT_print_ivar_layout))
1282     Opts.ObjCGCBitmapPrint = 1;
1283   if (Args.hasArg(OPT_fno_constant_cfstrings))
1284     Opts.NoConstantCFStrings = 1;
1285 
1286   if (Args.hasArg(OPT_faltivec))
1287     Opts.AltiVec = 1;
1288 
1289   if (Args.hasArg(OPT_pthread))
1290     Opts.POSIXThreads = 1;
1291 
1292   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1293   if (Vis == "default")
1294     Opts.setVisibilityMode(LangOptions::Default);
1295   else if (Vis == "hidden")
1296     Opts.setVisibilityMode(LangOptions::Hidden);
1297   else if (Vis == "protected")
1298     Opts.setVisibilityMode(LangOptions::Protected);
1299   else
1300     Diags.Report(diag::err_drv_invalid_value)
1301       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1302 
1303   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1304     Opts.InlineVisibilityHidden = 1;
1305 
1306   if (Args.hasArg(OPT_ftrapv))
1307     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1308   else if (Args.hasArg(OPT_fwrapv))
1309     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1310 
1311   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1312   // is specified, or -std is set to a conforming mode.
1313   Opts.Trigraphs = !Opts.GNUMode;
1314   if (Args.hasArg(OPT_trigraphs))
1315     Opts.Trigraphs = 1;
1316 
1317   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1318                                    OPT_fno_dollars_in_identifiers,
1319                                    !Opts.AsmPreprocessor);
1320   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1321   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1322   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1323   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1324   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1325   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1326     Opts.LaxVectorConversions = 0;
1327   if (Args.hasArg(OPT_fno_threadsafe_statics))
1328     Opts.ThreadsafeStatics = 0;
1329   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1330   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1331   Opts.Blocks = Args.hasArg(OPT_fblocks);
1332   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1333   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1334   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1335   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1336   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1337   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1338   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1339   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1340   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1341   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1342                                                Diags);
1343   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1344   Opts.ObjCConstantStringClass =
1345     Args.getLastArgValue(OPT_fconstant_string_class);
1346   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1347   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1348   if (Opts.ObjCNonFragileABI2)
1349     Opts.ObjCNonFragileABI = true;
1350   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1351   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1352   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1353   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1354   Opts.Static = Args.hasArg(OPT_static_define);
1355   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1356   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1357   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1358   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1359   Opts.OptimizeSize = 0;
1360 
1361   // FIXME: Eliminate this dependency.
1362   unsigned Opt =
1363     Args.hasArg(OPT_Os) ? 2 : Args.getLastArgIntValue(OPT_O, 0, Diags);
1364   Opts.Optimize = Opt != 0;
1365 
1366   // This is the __NO_INLINE__ define, which just depends on things like the
1367   // optimization level and -fno-inline, not actually whether the backend has
1368   // inlining enabled.
1369   //
1370   // FIXME: This is affected by other options (-fno-inline).
1371   Opts.NoInline = !Opt;
1372 
1373   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1374   switch (SSP) {
1375   default:
1376     Diags.Report(diag::err_drv_invalid_value)
1377       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1378     break;
1379   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1380   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1381   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1382   }
1383 }
1384 
1385 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1386                                   Diagnostic &Diags) {
1387   using namespace cc1options;
1388   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1389   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1390   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1391       Opts.TokenCache = A->getValue(Args);
1392   else
1393     Opts.TokenCache = Opts.ImplicitPTHInclude;
1394   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1395   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1396   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1397 
1398   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1399     llvm::StringRef Value(A->getValue(Args));
1400     size_t Comma = Value.find(',');
1401     unsigned Bytes = 0;
1402     unsigned EndOfLine = 0;
1403 
1404     if (Comma == llvm::StringRef::npos ||
1405         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1406         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1407       Diags.Report(diag::err_drv_preamble_format);
1408     else {
1409       Opts.PrecompiledPreambleBytes.first = Bytes;
1410       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1411     }
1412   }
1413 
1414   // Add macros from the command line.
1415   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1416          ie = Args.filtered_end(); it != ie; ++it) {
1417     if ((*it)->getOption().matches(OPT_D))
1418       Opts.addMacroDef((*it)->getValue(Args));
1419     else
1420       Opts.addMacroUndef((*it)->getValue(Args));
1421   }
1422 
1423   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1424 
1425   // Add the ordered list of -includes.
1426   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1427                                              OPT_include_pth),
1428          ie = Args.filtered_end(); it != ie; ++it) {
1429     const Arg *A = *it;
1430     // PCH is handled specially, we need to extra the original include path.
1431     if (A->getOption().matches(OPT_include_pch)) {
1432       std::string OriginalFile =
1433         ASTReader::getOriginalSourceFile(A->getValue(Args), Diags);
1434       if (OriginalFile.empty())
1435         continue;
1436 
1437       Opts.Includes.push_back(OriginalFile);
1438     } else
1439       Opts.Includes.push_back(A->getValue(Args));
1440   }
1441 
1442   // Include 'altivec.h' if -faltivec option present
1443   if (Args.hasArg(OPT_faltivec))
1444     Opts.Includes.push_back("altivec.h");
1445 
1446   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1447          ie = Args.filtered_end(); it != ie; ++it) {
1448     const Arg *A = *it;
1449     std::pair<llvm::StringRef,llvm::StringRef> Split =
1450       llvm::StringRef(A->getValue(Args)).split(';');
1451 
1452     if (Split.second.empty()) {
1453       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1454       continue;
1455     }
1456 
1457     Opts.addRemappedFile(Split.first, Split.second);
1458   }
1459 }
1460 
1461 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1462                                         ArgList &Args) {
1463   using namespace cc1options;
1464   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1465   Opts.ShowComments = Args.hasArg(OPT_C);
1466   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1467   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1468   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1469   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1470 }
1471 
1472 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1473   using namespace cc1options;
1474   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1475   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1476   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1477   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1478   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1479   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1480 
1481   // Use the host triple if unspecified.
1482   if (Opts.Triple.empty())
1483     Opts.Triple = llvm::sys::getHostTriple();
1484 }
1485 
1486 //
1487 
1488 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1489                                         const char **ArgBegin,
1490                                         const char **ArgEnd,
1491                                         Diagnostic &Diags) {
1492   // Parse the arguments.
1493   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1494   unsigned MissingArgIndex, MissingArgCount;
1495   llvm::OwningPtr<InputArgList> Args(
1496     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1497 
1498   // Check for missing argument error.
1499   if (MissingArgCount)
1500     Diags.Report(diag::err_drv_missing_argument)
1501       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1502 
1503   // Issue errors on unknown arguments.
1504   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1505          ie = Args->filtered_end(); it != ie; ++it)
1506     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1507 
1508   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1509   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1510   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1511   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1512   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1513   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1514   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1515     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1516   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1517   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1518   ParseTargetArgs(Res.getTargetOpts(), *Args);
1519 }
1520