xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 4545b2df42b4b284d0dc572f593adae7cf2dcb50) 
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.AnalyzerStats)
103     Res.push_back("-analyzer-stats");
104   if (Opts.EagerlyAssume)
105     Res.push_back("-analyzer-eagerly-assume");
106   if (!Opts.PurgeDead)
107     Res.push_back("-analyzer-no-purge-dead");
108   if (Opts.TrimGraph)
109     Res.push_back("-trim-egraph");
110   if (Opts.VisualizeEGDot)
111     Res.push_back("-analyzer-viz-egraph-graphviz");
112   if (Opts.VisualizeEGDot)
113     Res.push_back("-analyzer-viz-egraph-ubigraph");
114   if (Opts.EnableExperimentalChecks)
115     Res.push_back("-analyzer-experimental-checks");
116   if (Opts.EnableExperimentalInternalChecks)
117     Res.push_back("-analyzer-experimental-internal-checks");
118   if (Opts.IdempotentOps)
119       Res.push_back("-analyzer-check-idempotent-operations");
120 }
121 
122 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
123                               std::vector<std::string> &Res) {
124   if (Opts.DebugInfo)
125     Res.push_back("-g");
126   if (Opts.DisableLLVMOpts)
127     Res.push_back("-disable-llvm-optzns");
128   if (Opts.DisableRedZone)
129     Res.push_back("-disable-red-zone");
130   if (!Opts.DwarfDebugFlags.empty()) {
131     Res.push_back("-dwarf-debug-flags");
132     Res.push_back(Opts.DwarfDebugFlags);
133   }
134   if (!Opts.MergeAllConstants)
135     Res.push_back("-fno-merge-all-constants");
136   if (Opts.NoCommon)
137     Res.push_back("-fno-common");
138   if (Opts.NoImplicitFloat)
139     Res.push_back("-no-implicit-float");
140   if (Opts.OmitLeafFramePointer)
141     Res.push_back("-momit-leaf-frame-pointer");
142   if (Opts.OptimizeSize) {
143     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
144     Res.push_back("-Os");
145   } else if (Opts.OptimizationLevel != 0)
146     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
147   if (!Opts.MainFileName.empty()) {
148     Res.push_back("-main-file-name");
149     Res.push_back(Opts.MainFileName);
150   }
151   // SimplifyLibCalls is only derived.
152   // TimePasses is only derived.
153   // UnitAtATime is unused.
154   // Inlining is only derived.
155 
156   // UnrollLoops is derived, but also accepts an option, no
157   // harm in pushing it back here.
158   if (Opts.UnrollLoops)
159     Res.push_back("-funroll-loops");
160   if (Opts.DataSections)
161     Res.push_back("-fdata-sections");
162   if (Opts.FunctionSections)
163     Res.push_back("-ffunction-sections");
164   if (Opts.AsmVerbose)
165     Res.push_back("-masm-verbose");
166   if (!Opts.CodeModel.empty()) {
167     Res.push_back("-mcode-model");
168     Res.push_back(Opts.CodeModel);
169   }
170   if (!Opts.CXAAtExit)
171     Res.push_back("-fno-use-cxa-atexit");
172   if (Opts.CXXCtorDtorAliases)
173     Res.push_back("-mconstructor-aliases");
174   if (!Opts.DebugPass.empty()) {
175     Res.push_back("-mdebug-pass");
176     Res.push_back(Opts.DebugPass);
177   }
178   if (Opts.DisableFPElim)
179     Res.push_back("-mdisable-fp-elim");
180   if (!Opts.FloatABI.empty()) {
181     Res.push_back("-mfloat-abi");
182     Res.push_back(Opts.FloatABI);
183   }
184   if (!Opts.LimitFloatPrecision.empty()) {
185     Res.push_back("-mlimit-float-precision");
186     Res.push_back(Opts.LimitFloatPrecision);
187   }
188   if (Opts.NoZeroInitializedInBSS)
189     Res.push_back("-mno-zero-initialized-bss");
190   switch (Opts.getObjCDispatchMethod()) {
191   case CodeGenOptions::Legacy:
192     break;
193   case CodeGenOptions::Mixed:
194     Res.push_back("-fobjc-dispatch-method=mixed");
195     break;
196   case CodeGenOptions::NonLegacy:
197     Res.push_back("-fobjc-dispatch-method=non-legacy");
198     break;
199   }
200   if (Opts.RelaxAll)
201     Res.push_back("-mrelax-all");
202   if (Opts.SoftFloat)
203     Res.push_back("-msoft-float");
204   if (Opts.UnwindTables)
205     Res.push_back("-munwind-tables");
206   if (Opts.RelocationModel != "pic") {
207     Res.push_back("-mrelocation-model");
208     Res.push_back(Opts.RelocationModel);
209   }
210   if (!Opts.VerifyModule)
211     Res.push_back("-disable-llvm-verifier");
212 }
213 
214 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
215                                        std::vector<std::string> &Res) {
216   if (Opts.IncludeSystemHeaders)
217     Res.push_back("-sys-header-deps");
218   if (Opts.UsePhonyTargets)
219     Res.push_back("-MP");
220   if (!Opts.OutputFile.empty()) {
221     Res.push_back("-dependency-file");
222     Res.push_back(Opts.OutputFile);
223   }
224   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
225     Res.push_back("-MT");
226     Res.push_back(Opts.Targets[i]);
227   }
228 }
229 
230 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
231                                  std::vector<std::string> &Res) {
232   if (Opts.IgnoreWarnings)
233     Res.push_back("-w");
234   if (Opts.NoRewriteMacros)
235     Res.push_back("-Wno-rewrite-macros");
236   if (Opts.Pedantic)
237     Res.push_back("-pedantic");
238   if (Opts.PedanticErrors)
239     Res.push_back("-pedantic-errors");
240   if (!Opts.ShowColumn)
241     Res.push_back("-fno-show-column");
242   if (!Opts.ShowLocation)
243     Res.push_back("-fno-show-source-location");
244   if (!Opts.ShowCarets)
245     Res.push_back("-fno-caret-diagnostics");
246   if (!Opts.ShowFixits)
247     Res.push_back("-fno-diagnostics-fixit-info");
248   if (Opts.ShowSourceRanges)
249     Res.push_back("-fdiagnostics-print-source-range-info");
250   if (Opts.ShowParseableFixits)
251     Res.push_back("-fdiagnostics-parseable-fixits");
252   if (Opts.ShowColors)
253     Res.push_back("-fcolor-diagnostics");
254   if (Opts.VerifyDiagnostics)
255     Res.push_back("-verify");
256   if (Opts.BinaryOutput)
257     Res.push_back("-fdiagnostics-binary");
258   if (Opts.ShowOptionNames)
259     Res.push_back("-fdiagnostics-show-option");
260   if (Opts.ShowCategories == 1)
261     Res.push_back("-fdiagnostics-show-category=id");
262   else if (Opts.ShowCategories == 2)
263     Res.push_back("-fdiagnostics-show-category=name");
264   if (Opts.ErrorLimit) {
265     Res.push_back("-ferror-limit");
266     Res.push_back(llvm::utostr(Opts.ErrorLimit));
267   }
268   if (Opts.MacroBacktraceLimit
269                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
270     Res.push_back("-fmacro-backtrace-limit");
271     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
272   }
273   if (Opts.TemplateBacktraceLimit
274                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
275     Res.push_back("-ftemplate-backtrace-limit");
276     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
277   }
278 
279   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
280     Res.push_back("-ftabstop");
281     Res.push_back(llvm::utostr(Opts.TabStop));
282   }
283   if (Opts.MessageLength) {
284     Res.push_back("-fmessage-length");
285     Res.push_back(llvm::utostr(Opts.MessageLength));
286   }
287   if (!Opts.DumpBuildInformation.empty()) {
288     Res.push_back("-dump-build-information");
289     Res.push_back(Opts.DumpBuildInformation);
290   }
291   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
292     Res.push_back("-W" + Opts.Warnings[i]);
293 }
294 
295 static const char *getInputKindName(InputKind Kind) {
296   switch (Kind) {
297   case IK_None:              break;
298   case IK_AST:               return "ast";
299   case IK_Asm:               return "assembler-with-cpp";
300   case IK_C:                 return "c";
301   case IK_CXX:               return "c++";
302   case IK_LLVM_IR:           return "ir";
303   case IK_ObjC:              return "objective-c";
304   case IK_ObjCXX:            return "objective-c++";
305   case IK_OpenCL:            return "cl";
306   case IK_PreprocessedC:     return "cpp-output";
307   case IK_PreprocessedCXX:   return "c++-cpp-output";
308   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
309   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
310   }
311 
312   llvm_unreachable("Unexpected language kind!");
313   return 0;
314 }
315 
316 static const char *getActionName(frontend::ActionKind Kind) {
317   switch (Kind) {
318   case frontend::PluginAction:
319   case frontend::InheritanceView:
320     llvm_unreachable("Invalid kind!");
321 
322   case frontend::ASTDump:                return "-ast-dump";
323   case frontend::ASTPrint:               return "-ast-print";
324   case frontend::ASTPrintXML:            return "-ast-print-xml";
325   case frontend::ASTView:                return "-ast-view";
326   case frontend::BoostCon:               return "-boostcon";
327   case frontend::CreateModule:           return "-create-module";
328   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
329   case frontend::DumpTokens:             return "-dump-tokens";
330   case frontend::EmitAssembly:           return "-S";
331   case frontend::EmitBC:                 return "-emit-llvm-bc";
332   case frontend::EmitHTML:               return "-emit-html";
333   case frontend::EmitLLVM:               return "-emit-llvm";
334   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
335   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
336   case frontend::EmitObj:                return "-emit-obj";
337   case frontend::FixIt:                  return "-fixit";
338   case frontend::GeneratePCH:            return "-emit-pch";
339   case frontend::GeneratePTH:            return "-emit-pth";
340   case frontend::InitOnly:               return "-init-only";
341   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
342   case frontend::PrintDeclContext:       return "-print-decl-contexts";
343   case frontend::PrintPreamble:          return "-print-preamble";
344   case frontend::PrintPreprocessedInput: return "-E";
345   case frontend::RewriteMacros:          return "-rewrite-macros";
346   case frontend::RewriteObjC:            return "-rewrite-objc";
347   case frontend::RewriteTest:            return "-rewrite-test";
348   case frontend::RunAnalysis:            return "-analyze";
349   case frontend::RunPreprocessorOnly:    return "-Eonly";
350   }
351 
352   llvm_unreachable("Unexpected language kind!");
353   return 0;
354 }
355 
356 static void FrontendOptsToArgs(const FrontendOptions &Opts,
357                                std::vector<std::string> &Res) {
358   if (!Opts.DebugCodeCompletionPrinter)
359     Res.push_back("-no-code-completion-debug-printer");
360   if (Opts.DisableFree)
361     Res.push_back("-disable-free");
362   if (Opts.RelocatablePCH)
363     Res.push_back("-relocatable-pch");
364   if (Opts.ChainedPCH)
365     Res.push_back("-chained-pch");
366   if (Opts.ShowHelp)
367     Res.push_back("-help");
368   if (Opts.ShowMacrosInCodeCompletion)
369     Res.push_back("-code-completion-macros");
370   if (Opts.ShowCodePatternsInCodeCompletion)
371     Res.push_back("-code-completion-patterns");
372   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
373     Res.push_back("-no-code-completion-globals");
374   if (Opts.ShowStats)
375     Res.push_back("-print-stats");
376   if (Opts.ShowTimers)
377     Res.push_back("-ftime-report");
378   if (Opts.ShowVersion)
379     Res.push_back("-version");
380   if (Opts.FixWhatYouCan)
381     Res.push_back("-fix-what-you-can");
382 
383   bool NeedLang = false;
384   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
385     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
386         Opts.Inputs[i].first)
387       NeedLang = true;
388   if (NeedLang) {
389     Res.push_back("-x");
390     Res.push_back(getInputKindName(Opts.Inputs[0].first));
391   }
392   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
393     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
394            "Unable to represent this input vector!");
395     Res.push_back(Opts.Inputs[i].second);
396   }
397 
398   if (!Opts.OutputFile.empty()) {
399     Res.push_back("-o");
400     Res.push_back(Opts.OutputFile);
401   }
402   if (!Opts.ViewClassInheritance.empty()) {
403     Res.push_back("-cxx-inheritance-view");
404     Res.push_back(Opts.ViewClassInheritance);
405   }
406   if (!Opts.CodeCompletionAt.FileName.empty()) {
407     Res.push_back("-code-completion-at");
408     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
409                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
410                   llvm::utostr(Opts.CodeCompletionAt.Column));
411   }
412   if (Opts.ProgramAction != frontend::InheritanceView &&
413       Opts.ProgramAction != frontend::PluginAction)
414     Res.push_back(getActionName(Opts.ProgramAction));
415   if (!Opts.ActionName.empty()) {
416     Res.push_back("-plugin");
417     Res.push_back(Opts.ActionName);
418     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
419       Res.push_back("-plugin-arg-" + Opts.ActionName);
420       Res.push_back(Opts.PluginArgs[i]);
421     }
422   }
423   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
424     Res.push_back("-load");
425     Res.push_back(Opts.Plugins[i]);
426   }
427   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
428     Res.push_back("-ast-merge");
429     Res.push_back(Opts.ASTMergeFiles[i]);
430   }
431   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
432     Res.push_back("-import-module");
433     Res.push_back(Opts.Modules[i]);
434   }
435   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
436     Res.push_back("-mllvm");
437     Res.push_back(Opts.LLVMArgs[i]);
438   }
439 }
440 
441 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
442                                    std::vector<std::string> &Res) {
443   if (Opts.Sysroot != "/") {
444     Res.push_back("-isysroot");
445     Res.push_back(Opts.Sysroot);
446   }
447 
448   for (unsigned i = 0, e = Opts.CXXSystemIncludes.size(); i != e; ++i) {
449     Res.push_back("-cxx-system-include");
450     Res.push_back(Opts.CXXSystemIncludes[i]);
451   }
452 
453   /// User specified include entries.
454   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
455     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
456     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
457       llvm::report_fatal_error("Invalid option set!");
458     if (E.IsUserSupplied) {
459       if (E.Group == frontend::After) {
460         Res.push_back("-idirafter");
461       } else if (E.Group == frontend::Quoted) {
462         Res.push_back("-iquote");
463       } else if (E.Group == frontend::System) {
464         Res.push_back("-isystem");
465       } else {
466         assert(E.Group == frontend::Angled && "Invalid group!");
467         Res.push_back(E.IsFramework ? "-F" : "-I");
468       }
469     } else {
470       if (E.Group != frontend::Angled && E.Group != frontend::System)
471         llvm::report_fatal_error("Invalid option set!");
472       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
473                     "-iwithprefix");
474     }
475     Res.push_back(E.Path);
476   }
477 
478   if (!Opts.EnvIncPath.empty()) {
479     // FIXME: Provide an option for this, and move env detection to driver.
480     llvm::report_fatal_error("Not yet implemented!");
481   }
482   if (!Opts.CEnvIncPath.empty()) {
483     // FIXME: Provide an option for this, and move env detection to driver.
484     llvm::report_fatal_error("Not yet implemented!");
485   }
486   if (!Opts.ObjCEnvIncPath.empty()) {
487     // FIXME: Provide an option for this, and move env detection to driver.
488     llvm::report_fatal_error("Not yet implemented!");
489   }
490   if (!Opts.CXXEnvIncPath.empty()) {
491     // FIXME: Provide an option for this, and move env detection to driver.
492     llvm::report_fatal_error("Not yet implemented!");
493   }
494   if (!Opts.ObjCXXEnvIncPath.empty()) {
495     // FIXME: Provide an option for this, and move env detection to driver.
496     llvm::report_fatal_error("Not yet implemented!");
497   }
498   if (!Opts.ResourceDir.empty()) {
499     Res.push_back("-resource-dir");
500     Res.push_back(Opts.ResourceDir);
501   }
502   if (!Opts.UseStandardIncludes)
503     Res.push_back("-nostdinc");
504   if (!Opts.UseStandardCXXIncludes)
505     Res.push_back("-nostdinc++");
506   if (Opts.Verbose)
507     Res.push_back("-v");
508 }
509 
510 static void LangOptsToArgs(const LangOptions &Opts,
511                            std::vector<std::string> &Res) {
512   LangOptions DefaultLangOpts;
513 
514   // FIXME: Need to set -std to get all the implicit options.
515 
516   // FIXME: We want to only pass options relative to the defaults, which
517   // requires constructing a target. :(
518   //
519   // It would be better to push the all target specific choices into the driver,
520   // so that everything below that was more uniform.
521 
522   if (Opts.Trigraphs)
523     Res.push_back("-trigraphs");
524   // Implicit based on the input kind:
525   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
526   // Implicit based on the input language standard:
527   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
528   if (Opts.DollarIdents)
529     Res.push_back("-fdollars-in-identifiers");
530   if (Opts.GNUMode && !Opts.GNUKeywords)
531     Res.push_back("-fno-gnu-keywords");
532   if (!Opts.GNUMode && Opts.GNUKeywords)
533     Res.push_back("-fgnu-keywords");
534   if (Opts.Microsoft)
535     Res.push_back("-fms-extensions");
536   if (Opts.Borland)
537     Res.push_back("-fborland-extensions");
538   if (Opts.ObjCNonFragileABI)
539     Res.push_back("-fobjc-nonfragile-abi");
540   if (Opts.ObjCNonFragileABI2)
541     Res.push_back("-fobjc-nonfragile-abi2");
542   // NoInline is implicit.
543   if (!Opts.CXXOperatorNames)
544     Res.push_back("-fno-operator-names");
545   if (Opts.PascalStrings)
546     Res.push_back("-fpascal-strings");
547   if (Opts.CatchUndefined)
548     Res.push_back("-fcatch-undefined-behavior");
549   if (Opts.WritableStrings)
550     Res.push_back("-fwritable-strings");
551   if (Opts.ConstStrings)
552     Res.push_back("-Wwrite-strings");
553   if (!Opts.LaxVectorConversions)
554     Res.push_back("-fno-lax-vector-conversions");
555   if (Opts.AltiVec)
556     Res.push_back("-faltivec");
557   if (Opts.Exceptions)
558     Res.push_back("-fexceptions");
559   if (Opts.SjLjExceptions)
560     Res.push_back("-fsjlj-exceptions");
561   if (!Opts.RTTI)
562     Res.push_back("-fno-rtti");
563   if (!Opts.NeXTRuntime)
564     Res.push_back("-fgnu-runtime");
565   if (Opts.Freestanding)
566     Res.push_back("-ffreestanding");
567   if (Opts.NoBuiltin)
568     Res.push_back("-fno-builtin");
569   if (!Opts.AssumeSaneOperatorNew)
570     Res.push_back("-fno-assume-sane-operator-new");
571   if (!Opts.ThreadsafeStatics)
572     Res.push_back("-fno-threadsafe-statics");
573   if (Opts.POSIXThreads)
574     Res.push_back("-pthread");
575   if (Opts.Blocks)
576     Res.push_back("-fblocks");
577   if (Opts.EmitAllDecls)
578     Res.push_back("-femit-all-decls");
579   if (Opts.MathErrno)
580     Res.push_back("-fmath-errno");
581   switch (Opts.getSignedOverflowBehavior()) {
582   case LangOptions::SOB_Undefined: break;
583   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
584   case LangOptions::SOB_Trapping:  Res.push_back("-ftrapv"); break;
585   }
586   if (Opts.HeinousExtensions)
587     Res.push_back("-fheinous-gnu-extensions");
588   // Optimize is implicit.
589   // OptimizeSize is implicit.
590   if (Opts.Static)
591     Res.push_back("-static-define");
592   if (Opts.DumpRecordLayouts)
593     Res.push_back("-fdump-record-layouts");
594   if (Opts.DumpVTableLayouts)
595     Res.push_back("-fdump-vtable-layouts");
596   if (Opts.NoBitFieldTypeAlign)
597     Res.push_back("-fno-bitfield-type-alignment");
598   if (Opts.SjLjExceptions)
599     Res.push_back("-fsjlj-exceptions");
600   if (Opts.PICLevel) {
601     Res.push_back("-pic-level");
602     Res.push_back(llvm::utostr(Opts.PICLevel));
603   }
604   if (Opts.ObjCGCBitmapPrint)
605     Res.push_back("-print-ivar-layout");
606   if (Opts.NoConstantCFStrings)
607     Res.push_back("-fno-constant-cfstrings");
608   if (!Opts.AccessControl)
609     Res.push_back("-fno-access-control");
610   if (!Opts.CharIsSigned)
611     Res.push_back("-fno-signed-char");
612   if (Opts.ShortWChar)
613     Res.push_back("-fshort-wchar");
614   if (!Opts.ElideConstructors)
615     Res.push_back("-fno-elide-constructors");
616   if (Opts.getGCMode() != LangOptions::NonGC) {
617     if (Opts.getGCMode() == LangOptions::HybridGC) {
618       Res.push_back("-fobjc-gc");
619     } else {
620       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
621       Res.push_back("-fobjc-gc-only");
622     }
623   }
624   if (Opts.getVisibilityMode() != LangOptions::Default) {
625     Res.push_back("-fvisibility");
626     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
627       Res.push_back("hidden");
628     } else {
629       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
630              "Invalid visibility!");
631       Res.push_back("protected");
632     }
633   }
634   if (Opts.InlineVisibilityHidden)
635     Res.push_back("-fvisibility-inlines-hidden");
636 
637   if (Opts.getStackProtectorMode() != 0) {
638     Res.push_back("-stack-protector");
639     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
640   }
641   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
642     Res.push_back("-ftemplate-depth");
643     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
644   }
645   if (!Opts.ObjCConstantStringClass.empty()) {
646     Res.push_back("-fconstant-string-class");
647     Res.push_back(Opts.ObjCConstantStringClass);
648   }
649 }
650 
651 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
652                                    std::vector<std::string> &Res) {
653   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
654     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
655                   Opts.Macros[i].first);
656   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
657     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
658     Res.push_back("-include");
659     Res.push_back(Opts.Includes[i]);
660   }
661   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
662     Res.push_back("-imacros");
663     Res.push_back(Opts.MacroIncludes[i]);
664   }
665   if (!Opts.UsePredefines)
666     Res.push_back("-undef");
667   if (Opts.DetailedRecord)
668     Res.push_back("-detailed-preprocessing-record");
669   if (!Opts.ImplicitPCHInclude.empty()) {
670     Res.push_back("-include-pch");
671     Res.push_back(Opts.ImplicitPCHInclude);
672   }
673   if (!Opts.ImplicitPTHInclude.empty()) {
674     Res.push_back("-include-pth");
675     Res.push_back(Opts.ImplicitPTHInclude);
676   }
677   if (!Opts.TokenCache.empty()) {
678     if (Opts.ImplicitPTHInclude.empty()) {
679       Res.push_back("-token-cache");
680       Res.push_back(Opts.TokenCache);
681     } else
682       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
683              "Unsupported option combination!");
684   }
685   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
686     Res.push_back("-remap-file");
687     Res.push_back(Opts.RemappedFiles[i].first + ";" +
688                   Opts.RemappedFiles[i].second);
689   }
690 }
691 
692 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
693                                          std::vector<std::string> &Res) {
694   if (!Opts.ShowCPP && !Opts.ShowMacros)
695     llvm::report_fatal_error("Invalid option combination!");
696 
697   if (Opts.ShowCPP && Opts.ShowMacros)
698     Res.push_back("-dD");
699   else if (!Opts.ShowCPP && Opts.ShowMacros)
700     Res.push_back("-dM");
701 
702   if (Opts.ShowHeaderIncludes)
703     Res.push_back("-H");
704   if (!Opts.ShowLineMarkers)
705     Res.push_back("-P");
706   if (Opts.ShowComments)
707     Res.push_back("-C");
708   if (Opts.ShowMacroComments)
709     Res.push_back("-CC");
710 }
711 
712 static void TargetOptsToArgs(const TargetOptions &Opts,
713                              std::vector<std::string> &Res) {
714   Res.push_back("-triple");
715   Res.push_back(Opts.Triple);
716   if (!Opts.CPU.empty()) {
717     Res.push_back("-target-cpu");
718     Res.push_back(Opts.CPU);
719   }
720   if (!Opts.ABI.empty()) {
721     Res.push_back("-target-abi");
722     Res.push_back(Opts.ABI);
723   }
724   if (!Opts.LinkerVersion.empty()) {
725     Res.push_back("-target-linker-version");
726     Res.push_back(Opts.LinkerVersion);
727   }
728   if (!Opts.CXXABI.empty()) {
729     Res.push_back("-cxx-abi");
730     Res.push_back(Opts.CXXABI);
731   }
732   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
733     Res.push_back("-target-feature");
734     Res.push_back(Opts.Features[i]);
735   }
736 }
737 
738 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
739   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
740   CodeGenOptsToArgs(getCodeGenOpts(), Res);
741   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
742   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
743   FrontendOptsToArgs(getFrontendOpts(), Res);
744   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
745   LangOptsToArgs(getLangOpts(), Res);
746   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
747   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
748   TargetOptsToArgs(getTargetOpts(), Res);
749 }
750 
751 //===----------------------------------------------------------------------===//
752 // Deserialization (to args)
753 //===----------------------------------------------------------------------===//
754 
755 using namespace clang::driver;
756 using namespace clang::driver::cc1options;
757 
758 //
759 
760 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
761                               Diagnostic &Diags) {
762   using namespace cc1options;
763 
764   Opts.AnalysisList.clear();
765 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
766   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
767 #include "clang/Frontend/Analyses.def"
768 
769   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
770     llvm::StringRef Name = A->getValue(Args);
771     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
772 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
773       .Case(CMDFLAG, NAME##Model)
774 #include "clang/Frontend/Analyses.def"
775       .Default(NumStores);
776     // FIXME: Error handling.
777     if (Value == NumStores)
778       Diags.Report(diag::err_drv_invalid_value)
779         << A->getAsString(Args) << Name;
780     else
781       Opts.AnalysisStoreOpt = Value;
782   }
783 
784   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
785     llvm::StringRef Name = A->getValue(Args);
786     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
787 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
788       .Case(CMDFLAG, NAME##Model)
789 #include "clang/Frontend/Analyses.def"
790       .Default(NumConstraints);
791     // FIXME: Error handling.
792     if (Value == NumConstraints)
793       Diags.Report(diag::err_drv_invalid_value)
794         << A->getAsString(Args) << Name;
795     else
796       Opts.AnalysisConstraintsOpt = Value;
797   }
798 
799   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
800     llvm::StringRef Name = A->getValue(Args);
801     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
802 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
803       .Case(CMDFLAG, PD_##NAME)
804 #include "clang/Frontend/Analyses.def"
805       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
806     // FIXME: Error handling.
807     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
808       Diags.Report(diag::err_drv_invalid_value)
809         << A->getAsString(Args) << Name;
810     else
811       Opts.AnalysisDiagOpt = Value;
812   }
813 
814   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
815   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
816   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
817   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
818   Opts.AnalyzeNestedBlocks =
819     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
820   Opts.AnalyzerStats = Args.hasArg(OPT_analysis_AnalyzerStats);
821   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
822   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
823   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
824   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
825   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
826   Opts.EnableExperimentalInternalChecks =
827     Args.hasArg(OPT_analyzer_experimental_internal_checks);
828   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
829   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
830   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 3, Diags);
831   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
832   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
833 }
834 
835 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
836                              Diagnostic &Diags) {
837   using namespace cc1options;
838   // -Os implies -O2
839   if (Args.hasArg(OPT_Os))
840     Opts.OptimizationLevel = 2;
841   else {
842     Opts.OptimizationLevel = Args.getLastArgIntValue(OPT_O, 0, Diags);
843     if (Opts.OptimizationLevel > 3) {
844       Diags.Report(diag::err_drv_invalid_value)
845         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
846       Opts.OptimizationLevel = 3;
847     }
848   }
849 
850   // We must always run at least the always inlining pass.
851   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
852     : CodeGenOptions::OnlyAlwaysInlining;
853 
854   Opts.DebugInfo = Args.hasArg(OPT_g);
855   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
856   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
857   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
858   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
859   Opts.NoCommon = Args.hasArg(OPT_fno_common);
860   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
861   Opts.OptimizeSize = Args.hasArg(OPT_Os);
862   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
863                             Args.hasArg(OPT_ffreestanding));
864   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
865                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
866 
867   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
868   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
869   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
870   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
871   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
872   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
873   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
874   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
875   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
876   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
877   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
878   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
879   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
880   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
881   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
882 
883   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
884   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
885 
886   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
887   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
888 
889   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
890 
891   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
892     llvm::StringRef Name = A->getValue(Args);
893     unsigned Method = llvm::StringSwitch<unsigned>(Name)
894       .Case("legacy", CodeGenOptions::Legacy)
895       .Case("non-legacy", CodeGenOptions::NonLegacy)
896       .Case("mixed", CodeGenOptions::Mixed)
897       .Default(~0U);
898     if (Method == ~0U)
899       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
900     else
901       Opts.ObjCDispatchMethod = Method;
902   }
903 }
904 
905 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
906                                       ArgList &Args) {
907   using namespace cc1options;
908   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
909   Opts.Targets = Args.getAllArgValues(OPT_MT);
910   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
911   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
912 }
913 
914 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
915                                 Diagnostic &Diags) {
916   using namespace cc1options;
917   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
918   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
919   Opts.Pedantic = Args.hasArg(OPT_pedantic);
920   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
921   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
922   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
923   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
924   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
925   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
926   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
927 
928   llvm::StringRef ShowOverloads =
929     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
930   if (ShowOverloads == "best")
931     Opts.ShowOverloads = Diagnostic::Ovl_Best;
932   else if (ShowOverloads == "all")
933     Opts.ShowOverloads = Diagnostic::Ovl_All;
934   else
935     Diags.Report(diag::err_drv_invalid_value)
936       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
937       << ShowOverloads;
938 
939   llvm::StringRef ShowCategory =
940     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
941   if (ShowCategory == "none")
942     Opts.ShowCategories = 0;
943   else if (ShowCategory == "id")
944     Opts.ShowCategories = 1;
945   else if (ShowCategory == "name")
946     Opts.ShowCategories = 2;
947   else
948     Diags.Report(diag::err_drv_invalid_value)
949       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
950       << ShowCategory;
951 
952   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
953   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
954   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
955   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
956   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
957   Opts.MacroBacktraceLimit
958     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
959                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
960   Opts.TemplateBacktraceLimit
961     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
962                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
963                          Diags);
964   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
965                                     DiagnosticOptions::DefaultTabStop, Diags);
966   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
967     Diags.Report(diag::warn_ignoring_ftabstop_value)
968       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
969     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
970   }
971   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
972   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
973   Opts.Warnings = Args.getAllArgValues(OPT_W);
974 }
975 
976 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
977                                    Diagnostic &Diags) {
978   using namespace cc1options;
979   Opts.ProgramAction = frontend::ParseSyntaxOnly;
980   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
981     switch (A->getOption().getID()) {
982     default:
983       assert(0 && "Invalid option in group!");
984     case OPT_ast_dump:
985       Opts.ProgramAction = frontend::ASTDump; break;
986     case OPT_ast_print:
987       Opts.ProgramAction = frontend::ASTPrint; break;
988     case OPT_ast_print_xml:
989       Opts.ProgramAction = frontend::ASTPrintXML; break;
990     case OPT_ast_view:
991       Opts.ProgramAction = frontend::ASTView; break;
992     case OPT_boostcon:
993       Opts.ProgramAction = frontend::BoostCon; break;
994     case OPT_dump_raw_tokens:
995       Opts.ProgramAction = frontend::DumpRawTokens; break;
996     case OPT_dump_tokens:
997       Opts.ProgramAction = frontend::DumpTokens; break;
998     case OPT_S:
999       Opts.ProgramAction = frontend::EmitAssembly; break;
1000     case OPT_emit_llvm_bc:
1001       Opts.ProgramAction = frontend::EmitBC; break;
1002     case OPT_emit_html:
1003       Opts.ProgramAction = frontend::EmitHTML; break;
1004     case OPT_emit_llvm:
1005       Opts.ProgramAction = frontend::EmitLLVM; break;
1006     case OPT_emit_llvm_only:
1007       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1008     case OPT_emit_codegen_only:
1009       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1010     case OPT_emit_obj:
1011       Opts.ProgramAction = frontend::EmitObj; break;
1012     case OPT_fixit_EQ:
1013       Opts.FixItSuffix = A->getValue(Args);
1014       // fall-through!
1015     case OPT_fixit:
1016       Opts.ProgramAction = frontend::FixIt; break;
1017     case OPT_emit_pch:
1018       Opts.ProgramAction = frontend::GeneratePCH; break;
1019     case OPT_emit_pth:
1020       Opts.ProgramAction = frontend::GeneratePTH; break;
1021     case OPT_init_only:
1022       Opts.ProgramAction = frontend::InitOnly; break;
1023     case OPT_fsyntax_only:
1024       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1025     case OPT_print_decl_contexts:
1026       Opts.ProgramAction = frontend::PrintDeclContext; break;
1027     case OPT_print_preamble:
1028       Opts.ProgramAction = frontend::PrintPreamble; break;
1029     case OPT_E:
1030       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1031     case OPT_rewrite_macros:
1032       Opts.ProgramAction = frontend::RewriteMacros; break;
1033     case OPT_rewrite_objc:
1034       Opts.ProgramAction = frontend::RewriteObjC; break;
1035     case OPT_rewrite_test:
1036       Opts.ProgramAction = frontend::RewriteTest; break;
1037     case OPT_analyze:
1038       Opts.ProgramAction = frontend::RunAnalysis; break;
1039     case OPT_Eonly:
1040       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1041     case OPT_create_module:
1042       Opts.ProgramAction = frontend::CreateModule; break;
1043     }
1044   }
1045 
1046   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1047     Opts.Plugins.push_back(A->getValue(Args,0));
1048     Opts.ProgramAction = frontend::PluginAction;
1049     Opts.ActionName = A->getValue(Args);
1050 
1051     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1052            end = Args.filtered_end(); it != end; ++it) {
1053       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1054         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1055     }
1056   }
1057 
1058   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1059     Opts.CodeCompletionAt =
1060       ParsedSourceLocation::FromString(A->getValue(Args));
1061     if (Opts.CodeCompletionAt.FileName.empty())
1062       Diags.Report(diag::err_drv_invalid_value)
1063         << A->getAsString(Args) << A->getValue(Args);
1064   }
1065   Opts.DebugCodeCompletionPrinter =
1066     !Args.hasArg(OPT_no_code_completion_debug_printer);
1067   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1068 
1069   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1070   Opts.Plugins = Args.getAllArgValues(OPT_load);
1071   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1072   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1073   Opts.ShowHelp = Args.hasArg(OPT_help);
1074   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1075   Opts.ShowCodePatternsInCodeCompletion
1076     = Args.hasArg(OPT_code_completion_patterns);
1077   Opts.ShowGlobalSymbolsInCodeCompletion
1078     = !Args.hasArg(OPT_no_code_completion_globals);
1079   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1080   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1081   Opts.ShowVersion = Args.hasArg(OPT_version);
1082   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1083   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1084   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1085   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1086   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1087 
1088   InputKind DashX = IK_None;
1089   if (const Arg *A = Args.getLastArg(OPT_x)) {
1090     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1091       .Case("c", IK_C)
1092       .Case("cl", IK_OpenCL)
1093       .Case("c", IK_C)
1094       .Case("cl", IK_OpenCL)
1095       .Case("c++", IK_CXX)
1096       .Case("objective-c", IK_ObjC)
1097       .Case("objective-c++", IK_ObjCXX)
1098       .Case("cpp-output", IK_PreprocessedC)
1099       .Case("assembler-with-cpp", IK_Asm)
1100       .Case("c++-cpp-output", IK_PreprocessedCXX)
1101       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1102       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1103       .Case("c-header", IK_C)
1104       .Case("objective-c-header", IK_ObjC)
1105       .Case("c++-header", IK_CXX)
1106       .Case("objective-c++-header", IK_ObjCXX)
1107       .Case("ast", IK_AST)
1108       .Case("ir", IK_LLVM_IR)
1109       .Default(IK_None);
1110     if (DashX == IK_None)
1111       Diags.Report(diag::err_drv_invalid_value)
1112         << A->getAsString(Args) << A->getValue(Args);
1113   }
1114 
1115   // '-' is the default input if none is given.
1116   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1117   Opts.Inputs.clear();
1118   if (Inputs.empty())
1119     Inputs.push_back("-");
1120   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1121     InputKind IK = DashX;
1122     if (IK == IK_None) {
1123       IK = FrontendOptions::getInputKindForExtension(
1124         llvm::StringRef(Inputs[i]).rsplit('.').second);
1125       // FIXME: Remove this hack.
1126       if (i == 0)
1127         DashX = IK;
1128     }
1129     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1130   }
1131 
1132   return DashX;
1133 }
1134 
1135 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1136                                                  void *MainAddr) {
1137   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1138 
1139   if (!P.isEmpty()) {
1140     P.eraseComponent();  // Remove /clang from foo/bin/clang
1141     P.eraseComponent();  // Remove /bin   from foo/bin
1142 
1143     // Get foo/lib/clang/<version>/include
1144     P.appendComponent("lib");
1145     P.appendComponent("clang");
1146     P.appendComponent(CLANG_VERSION_STRING);
1147   }
1148 
1149   return P.str();
1150 }
1151 
1152 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1153   using namespace cc1options;
1154   Opts.CXXSystemIncludes = Args.getAllArgValues(OPT_cxx_system_include);
1155   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1156   Opts.Verbose = Args.hasArg(OPT_v);
1157   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1158   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1159   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1160   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1161 
1162   // Add -I... and -F... options in order.
1163   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1164          ie = Args.filtered_end(); it != ie; ++it)
1165     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1166                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1167 
1168   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1169   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1170   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1171                                              OPT_iwithprefixbefore),
1172          ie = Args.filtered_end(); it != ie; ++it) {
1173     const Arg *A = *it;
1174     if (A->getOption().matches(OPT_iprefix))
1175       Prefix = A->getValue(Args);
1176     else if (A->getOption().matches(OPT_iwithprefix))
1177       Opts.AddPath(Prefix.str() + A->getValue(Args),
1178                    frontend::System, false, false, true);
1179     else
1180       Opts.AddPath(Prefix.str() + A->getValue(Args),
1181                    frontend::Angled, false, false, true);
1182   }
1183 
1184   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1185          ie = Args.filtered_end(); it != ie; ++it)
1186     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1187   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1188          ie = Args.filtered_end(); it != ie; ++it)
1189     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1190   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1191          ie = Args.filtered_end(); it != ie; ++it)
1192     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1193                  (*it)->getOption().matches(OPT_iwithsysroot));
1194 
1195   // FIXME: Need options for the various environment variables!
1196 }
1197 
1198 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1199                           Diagnostic &Diags) {
1200   // FIXME: Cleanup per-file based stuff.
1201 
1202   // Set some properties which depend soley on the input kind; it would be nice
1203   // to move these to the language standard, and have the driver resolve the
1204   // input kind + language standard.
1205   if (IK == IK_Asm) {
1206     Opts.AsmPreprocessor = 1;
1207   } else if (IK == IK_ObjC ||
1208              IK == IK_ObjCXX ||
1209              IK == IK_PreprocessedObjC ||
1210              IK == IK_PreprocessedObjCXX) {
1211     Opts.ObjC1 = Opts.ObjC2 = 1;
1212   }
1213 
1214   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1215   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1216     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1217 #define LANGSTANDARD(id, name, desc, features) \
1218       .Case(name, LangStandard::lang_##id)
1219 #include "clang/Frontend/LangStandards.def"
1220       .Default(LangStandard::lang_unspecified);
1221     if (LangStd == LangStandard::lang_unspecified)
1222       Diags.Report(diag::err_drv_invalid_value)
1223         << A->getAsString(Args) << A->getValue(Args);
1224   }
1225 
1226   if (LangStd == LangStandard::lang_unspecified) {
1227     // Based on the base language, pick one.
1228     switch (IK) {
1229     case IK_None:
1230     case IK_AST:
1231     case IK_LLVM_IR:
1232       assert(0 && "Invalid input kind!");
1233     case IK_OpenCL:
1234       LangStd = LangStandard::lang_opencl;
1235       break;
1236     case IK_Asm:
1237     case IK_C:
1238     case IK_PreprocessedC:
1239     case IK_ObjC:
1240     case IK_PreprocessedObjC:
1241       LangStd = LangStandard::lang_gnu99;
1242       break;
1243     case IK_CXX:
1244     case IK_PreprocessedCXX:
1245     case IK_ObjCXX:
1246     case IK_PreprocessedObjCXX:
1247       LangStd = LangStandard::lang_gnucxx98;
1248       break;
1249     }
1250   }
1251 
1252   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1253   Opts.BCPLComment = Std.hasBCPLComments();
1254   Opts.C99 = Std.isC99();
1255   Opts.CPlusPlus = Std.isCPlusPlus();
1256   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1257   Opts.Digraphs = Std.hasDigraphs();
1258   Opts.GNUMode = Std.isGNUMode();
1259   Opts.GNUInline = !Std.isC99();
1260   Opts.HexFloats = Std.hasHexFloats();
1261   Opts.ImplicitInt = Std.hasImplicitInt();
1262 
1263   // OpenCL has some additional defaults.
1264   if (LangStd == LangStandard::lang_opencl) {
1265     Opts.OpenCL = 1;
1266     Opts.AltiVec = 1;
1267     Opts.CXXOperatorNames = 1;
1268     Opts.LaxVectorConversions = 1;
1269   }
1270 
1271   // OpenCL and C++ both have bool, true, false keywords.
1272   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1273 
1274   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1275   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1276   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1277   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1278   // name, as it doesn't seem a useful distinction.
1279   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1280                                   Opts.GNUMode);
1281 
1282   if (Opts.CPlusPlus)
1283     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1284 
1285   if (Args.hasArg(OPT_fobjc_gc_only))
1286     Opts.setGCMode(LangOptions::GCOnly);
1287   else if (Args.hasArg(OPT_fobjc_gc))
1288     Opts.setGCMode(LangOptions::HybridGC);
1289 
1290   if (Args.hasArg(OPT_print_ivar_layout))
1291     Opts.ObjCGCBitmapPrint = 1;
1292   if (Args.hasArg(OPT_fno_constant_cfstrings))
1293     Opts.NoConstantCFStrings = 1;
1294 
1295   if (Args.hasArg(OPT_faltivec))
1296     Opts.AltiVec = 1;
1297 
1298   if (Args.hasArg(OPT_pthread))
1299     Opts.POSIXThreads = 1;
1300 
1301   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1302   if (Vis == "default")
1303     Opts.setVisibilityMode(LangOptions::Default);
1304   else if (Vis == "hidden")
1305     Opts.setVisibilityMode(LangOptions::Hidden);
1306   else if (Vis == "protected")
1307     Opts.setVisibilityMode(LangOptions::Protected);
1308   else
1309     Diags.Report(diag::err_drv_invalid_value)
1310       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1311 
1312   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1313     Opts.InlineVisibilityHidden = 1;
1314 
1315   if (Args.hasArg(OPT_ftrapv))
1316     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1317   else if (Args.hasArg(OPT_fwrapv))
1318     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1319 
1320   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1321   // is specified, or -std is set to a conforming mode.
1322   Opts.Trigraphs = !Opts.GNUMode;
1323   if (Args.hasArg(OPT_trigraphs))
1324     Opts.Trigraphs = 1;
1325 
1326   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1327                                    OPT_fno_dollars_in_identifiers,
1328                                    !Opts.AsmPreprocessor);
1329   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1330   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1331   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1332   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1333   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1334   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1335     Opts.LaxVectorConversions = 0;
1336   if (Args.hasArg(OPT_fno_threadsafe_statics))
1337     Opts.ThreadsafeStatics = 0;
1338   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1339   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1340   Opts.Blocks = Args.hasArg(OPT_fblocks);
1341   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1342   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1343   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1344   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1345   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1346   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1347   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1348   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1349   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1350   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1351                                                Diags);
1352   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1353   Opts.ObjCConstantStringClass =
1354     Args.getLastArgValue(OPT_fconstant_string_class);
1355   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1356   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1357   if (Opts.ObjCNonFragileABI2)
1358     Opts.ObjCNonFragileABI = true;
1359   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1360   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1361   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1362   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1363   Opts.Static = Args.hasArg(OPT_static_define);
1364   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1365   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1366   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1367   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1368   Opts.OptimizeSize = 0;
1369 
1370   // FIXME: Eliminate this dependency.
1371   unsigned Opt =
1372     Args.hasArg(OPT_Os) ? 2 : Args.getLastArgIntValue(OPT_O, 0, Diags);
1373   Opts.Optimize = Opt != 0;
1374 
1375   // This is the __NO_INLINE__ define, which just depends on things like the
1376   // optimization level and -fno-inline, not actually whether the backend has
1377   // inlining enabled.
1378   //
1379   // FIXME: This is affected by other options (-fno-inline).
1380   Opts.NoInline = !Opt;
1381 
1382   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1383   switch (SSP) {
1384   default:
1385     Diags.Report(diag::err_drv_invalid_value)
1386       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1387     break;
1388   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1389   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1390   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1391   }
1392 }
1393 
1394 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1395                                   Diagnostic &Diags) {
1396   using namespace cc1options;
1397   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1398   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1399   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1400       Opts.TokenCache = A->getValue(Args);
1401   else
1402     Opts.TokenCache = Opts.ImplicitPTHInclude;
1403   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1404   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1405   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1406 
1407   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1408     llvm::StringRef Value(A->getValue(Args));
1409     size_t Comma = Value.find(',');
1410     unsigned Bytes = 0;
1411     unsigned EndOfLine = 0;
1412 
1413     if (Comma == llvm::StringRef::npos ||
1414         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1415         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1416       Diags.Report(diag::err_drv_preamble_format);
1417     else {
1418       Opts.PrecompiledPreambleBytes.first = Bytes;
1419       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1420     }
1421   }
1422 
1423   // Add macros from the command line.
1424   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1425          ie = Args.filtered_end(); it != ie; ++it) {
1426     if ((*it)->getOption().matches(OPT_D))
1427       Opts.addMacroDef((*it)->getValue(Args));
1428     else
1429       Opts.addMacroUndef((*it)->getValue(Args));
1430   }
1431 
1432   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1433 
1434   // Add the ordered list of -includes.
1435   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1436                                              OPT_include_pth),
1437          ie = Args.filtered_end(); it != ie; ++it) {
1438     const Arg *A = *it;
1439     // PCH is handled specially, we need to extra the original include path.
1440     if (A->getOption().matches(OPT_include_pch)) {
1441       std::string OriginalFile =
1442         ASTReader::getOriginalSourceFile(A->getValue(Args), Diags);
1443       if (OriginalFile.empty())
1444         continue;
1445 
1446       Opts.Includes.push_back(OriginalFile);
1447     } else
1448       Opts.Includes.push_back(A->getValue(Args));
1449   }
1450 
1451   // Include 'altivec.h' if -faltivec option present
1452   if (Args.hasArg(OPT_faltivec))
1453     Opts.Includes.push_back("altivec.h");
1454 
1455   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1456          ie = Args.filtered_end(); it != ie; ++it) {
1457     const Arg *A = *it;
1458     std::pair<llvm::StringRef,llvm::StringRef> Split =
1459       llvm::StringRef(A->getValue(Args)).split(';');
1460 
1461     if (Split.second.empty()) {
1462       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1463       continue;
1464     }
1465 
1466     Opts.addRemappedFile(Split.first, Split.second);
1467   }
1468 }
1469 
1470 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1471                                         ArgList &Args) {
1472   using namespace cc1options;
1473   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1474   Opts.ShowComments = Args.hasArg(OPT_C);
1475   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1476   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1477   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1478   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1479 }
1480 
1481 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1482   using namespace cc1options;
1483   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1484   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1485   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1486   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1487   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1488   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1489 
1490   // Use the host triple if unspecified.
1491   if (Opts.Triple.empty())
1492     Opts.Triple = llvm::sys::getHostTriple();
1493 }
1494 
1495 //
1496 
1497 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1498                                         const char **ArgBegin,
1499                                         const char **ArgEnd,
1500                                         Diagnostic &Diags) {
1501   // Parse the arguments.
1502   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1503   unsigned MissingArgIndex, MissingArgCount;
1504   llvm::OwningPtr<InputArgList> Args(
1505     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1506 
1507   // Check for missing argument error.
1508   if (MissingArgCount)
1509     Diags.Report(diag::err_drv_missing_argument)
1510       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1511 
1512   // Issue errors on unknown arguments.
1513   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1514          ie = Args->filtered_end(); it != ie; ++it)
1515     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1516 
1517   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1518   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1519   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1520   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1521   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1522   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1523   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1524     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1525   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1526   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1527   ParseTargetArgs(Res.getTargetOpts(), *Args);
1528 }
1529