xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision fafa66500b331fca69bbe0298fd95737e1f95b3f) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Driver/Arg.h"
15 #include "clang/Driver/ArgList.h"
16 #include "clang/Driver/CC1Options.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/OptTable.h"
19 #include "clang/Driver/Option.h"
20 #include "clang/Frontend/CompilerInvocation.h"
21 #include "clang/Frontend/LangStandard.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/StringSwitch.h"
27 #include "llvm/ADT/Triple.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/Host.h"
30 #include "llvm/Support/Path.h"
31 using namespace clang;
32 
33 static const char *getAnalysisName(Analyses Kind) {
34   switch (Kind) {
35   default:
36     llvm_unreachable("Unknown analysis kind!");
37 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
38   case NAME: return "-" CMDFLAG;
39 #include "clang/Frontend/Analyses.def"
40   }
41 }
42 
43 static const char *getAnalysisStoreName(AnalysisStores Kind) {
44   switch (Kind) {
45   default:
46     llvm_unreachable("Unknown analysis store!");
47 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
48   case NAME##Model: return CMDFLAG;
49 #include "clang/Frontend/Analyses.def"
50   }
51 }
52 
53 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
54   switch (Kind) {
55   default:
56     llvm_unreachable("Unknown analysis constraints!");
57 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
58   case NAME##Model: return CMDFLAG;
59 #include "clang/Frontend/Analyses.def"
60   }
61 }
62 
63 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
64   switch (Kind) {
65   default:
66     llvm_unreachable("Unknown analysis client!");
67 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
68   case PD_##NAME: return CMDFLAG;
69 #include "clang/Frontend/Analyses.def"
70   }
71 }
72 
73 //===----------------------------------------------------------------------===//
74 // Serialization (to args)
75 //===----------------------------------------------------------------------===//
76 
77 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
78                                std::vector<std::string> &Res) {
79   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
80     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
81   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
82     Res.push_back("-analyzer-store");
83     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
84   }
85   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
86     Res.push_back("-analyzer-constraints");
87     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
88   }
89   if (Opts.AnalysisDiagOpt != PD_HTML) {
90     Res.push_back("-analyzer-output");
91     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
92   }
93   if (!Opts.AnalyzeSpecificFunction.empty()) {
94     Res.push_back("-analyze-function");
95     Res.push_back(Opts.AnalyzeSpecificFunction);
96   }
97   if (Opts.AnalyzeAll)
98     Res.push_back("-analyzer-opt-analyze-headers");
99   if (Opts.AnalyzerDisplayProgress)
100     Res.push_back("-analyzer-display-progress");
101   if (Opts.AnalyzeNestedBlocks)
102     Res.push_back("-analyzer-opt-analyze-nested-blocks");
103   if (Opts.AnalyzerStats)
104     Res.push_back("-analyzer-stats");
105   if (Opts.EagerlyAssume)
106     Res.push_back("-analyzer-eagerly-assume");
107   if (!Opts.PurgeDead)
108     Res.push_back("-analyzer-no-purge-dead");
109   if (Opts.TrimGraph)
110     Res.push_back("-trim-egraph");
111   if (Opts.VisualizeEGDot)
112     Res.push_back("-analyzer-viz-egraph-graphviz");
113   if (Opts.VisualizeEGDot)
114     Res.push_back("-analyzer-viz-egraph-ubigraph");
115   if (Opts.EnableExperimentalChecks)
116     Res.push_back("-analyzer-experimental-checks");
117   if (Opts.EnableExperimentalInternalChecks)
118     Res.push_back("-analyzer-experimental-internal-checks");
119   if (Opts.IdempotentOps)
120       Res.push_back("-analyzer-check-idempotent-operations");
121 }
122 
123 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
124                               std::vector<std::string> &Res) {
125   if (Opts.DebugInfo)
126     Res.push_back("-g");
127   if (Opts.DisableLLVMOpts)
128     Res.push_back("-disable-llvm-optzns");
129   if (Opts.DisableRedZone)
130     Res.push_back("-disable-red-zone");
131   if (!Opts.DwarfDebugFlags.empty()) {
132     Res.push_back("-dwarf-debug-flags");
133     Res.push_back(Opts.DwarfDebugFlags);
134   }
135   if (!Opts.MergeAllConstants)
136     Res.push_back("-fno-merge-all-constants");
137   if (Opts.NoCommon)
138     Res.push_back("-fno-common");
139   if (Opts.NoImplicitFloat)
140     Res.push_back("-no-implicit-float");
141   if (Opts.OmitLeafFramePointer)
142     Res.push_back("-momit-leaf-frame-pointer");
143   if (Opts.OptimizeSize) {
144     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
145     Res.push_back("-Os");
146   } else if (Opts.OptimizationLevel != 0)
147     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
148   if (!Opts.MainFileName.empty()) {
149     Res.push_back("-main-file-name");
150     Res.push_back(Opts.MainFileName);
151   }
152   // SimplifyLibCalls is only derived.
153   // TimePasses is only derived.
154   // UnitAtATime is unused.
155   // Inlining is only derived.
156 
157   // UnrollLoops is derived, but also accepts an option, no
158   // harm in pushing it back here.
159   if (Opts.UnrollLoops)
160     Res.push_back("-funroll-loops");
161   if (Opts.DataSections)
162     Res.push_back("-fdata-sections");
163   if (Opts.FunctionSections)
164     Res.push_back("-ffunction-sections");
165   if (Opts.AsmVerbose)
166     Res.push_back("-masm-verbose");
167   if (!Opts.CodeModel.empty()) {
168     Res.push_back("-mcode-model");
169     Res.push_back(Opts.CodeModel);
170   }
171   if (!Opts.CXAAtExit)
172     Res.push_back("-fno-use-cxa-atexit");
173   if (Opts.CXXCtorDtorAliases)
174     Res.push_back("-mconstructor-aliases");
175   if (!Opts.DebugPass.empty()) {
176     Res.push_back("-mdebug-pass");
177     Res.push_back(Opts.DebugPass);
178   }
179   if (Opts.DisableFPElim)
180     Res.push_back("-mdisable-fp-elim");
181   if (!Opts.FloatABI.empty()) {
182     Res.push_back("-mfloat-abi");
183     Res.push_back(Opts.FloatABI);
184   }
185   if (!Opts.LimitFloatPrecision.empty()) {
186     Res.push_back("-mlimit-float-precision");
187     Res.push_back(Opts.LimitFloatPrecision);
188   }
189   if (Opts.NoZeroInitializedInBSS)
190     Res.push_back("-mno-zero-initialized-bss");
191   switch (Opts.getObjCDispatchMethod()) {
192   case CodeGenOptions::Legacy:
193     break;
194   case CodeGenOptions::Mixed:
195     Res.push_back("-fobjc-dispatch-method=mixed");
196     break;
197   case CodeGenOptions::NonLegacy:
198     Res.push_back("-fobjc-dispatch-method=non-legacy");
199     break;
200   }
201   if (Opts.RelaxAll)
202     Res.push_back("-mrelax-all");
203   if (Opts.SoftFloat)
204     Res.push_back("-msoft-float");
205   if (Opts.UnwindTables)
206     Res.push_back("-munwind-tables");
207   if (Opts.RelocationModel != "pic") {
208     Res.push_back("-mrelocation-model");
209     Res.push_back(Opts.RelocationModel);
210   }
211   if (!Opts.VerifyModule)
212     Res.push_back("-disable-llvm-verifier");
213 }
214 
215 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
216                                        std::vector<std::string> &Res) {
217   if (Opts.IncludeSystemHeaders)
218     Res.push_back("-sys-header-deps");
219   if (Opts.UsePhonyTargets)
220     Res.push_back("-MP");
221   if (!Opts.OutputFile.empty()) {
222     Res.push_back("-dependency-file");
223     Res.push_back(Opts.OutputFile);
224   }
225   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
226     Res.push_back("-MT");
227     Res.push_back(Opts.Targets[i]);
228   }
229 }
230 
231 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
232                                  std::vector<std::string> &Res) {
233   if (Opts.IgnoreWarnings)
234     Res.push_back("-w");
235   if (Opts.NoRewriteMacros)
236     Res.push_back("-Wno-rewrite-macros");
237   if (Opts.Pedantic)
238     Res.push_back("-pedantic");
239   if (Opts.PedanticErrors)
240     Res.push_back("-pedantic-errors");
241   if (!Opts.ShowColumn)
242     Res.push_back("-fno-show-column");
243   if (!Opts.ShowLocation)
244     Res.push_back("-fno-show-source-location");
245   if (!Opts.ShowCarets)
246     Res.push_back("-fno-caret-diagnostics");
247   if (!Opts.ShowFixits)
248     Res.push_back("-fno-diagnostics-fixit-info");
249   if (Opts.ShowSourceRanges)
250     Res.push_back("-fdiagnostics-print-source-range-info");
251   if (Opts.ShowParseableFixits)
252     Res.push_back("-fdiagnostics-parseable-fixits");
253   if (Opts.ShowColors)
254     Res.push_back("-fcolor-diagnostics");
255   if (Opts.VerifyDiagnostics)
256     Res.push_back("-verify");
257   if (Opts.ShowOptionNames)
258     Res.push_back("-fdiagnostics-show-option");
259   if (Opts.ShowCategories == 1)
260     Res.push_back("-fdiagnostics-show-category=id");
261   else if (Opts.ShowCategories == 2)
262     Res.push_back("-fdiagnostics-show-category=name");
263   if (Opts.ErrorLimit) {
264     Res.push_back("-ferror-limit");
265     Res.push_back(llvm::utostr(Opts.ErrorLimit));
266   }
267   if (Opts.MacroBacktraceLimit
268                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
269     Res.push_back("-fmacro-backtrace-limit");
270     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
271   }
272   if (Opts.TemplateBacktraceLimit
273                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
274     Res.push_back("-ftemplate-backtrace-limit");
275     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
276   }
277 
278   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
279     Res.push_back("-ftabstop");
280     Res.push_back(llvm::utostr(Opts.TabStop));
281   }
282   if (Opts.MessageLength) {
283     Res.push_back("-fmessage-length");
284     Res.push_back(llvm::utostr(Opts.MessageLength));
285   }
286   if (!Opts.DumpBuildInformation.empty()) {
287     Res.push_back("-dump-build-information");
288     Res.push_back(Opts.DumpBuildInformation);
289   }
290   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
291     Res.push_back("-W" + Opts.Warnings[i]);
292 }
293 
294 static const char *getInputKindName(InputKind Kind) {
295   switch (Kind) {
296   case IK_None:              break;
297   case IK_AST:               return "ast";
298   case IK_Asm:               return "assembler-with-cpp";
299   case IK_C:                 return "c";
300   case IK_CXX:               return "c++";
301   case IK_LLVM_IR:           return "ir";
302   case IK_ObjC:              return "objective-c";
303   case IK_ObjCXX:            return "objective-c++";
304   case IK_OpenCL:            return "cl";
305   case IK_CUDA:              return "cuda";
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::ASTDumpXML:             return "-ast-dump-xml";
324   case frontend::ASTPrint:               return "-ast-print";
325   case frontend::ASTPrintXML:            return "-ast-print-xml";
326   case frontend::ASTView:                return "-ast-view";
327   case frontend::BoostCon:               return "-boostcon";
328   case frontend::CreateModule:           return "-create-module";
329   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
330   case frontend::DumpTokens:             return "-dump-tokens";
331   case frontend::EmitAssembly:           return "-S";
332   case frontend::EmitBC:                 return "-emit-llvm-bc";
333   case frontend::EmitHTML:               return "-emit-html";
334   case frontend::EmitLLVM:               return "-emit-llvm";
335   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
336   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
337   case frontend::EmitObj:                return "-emit-obj";
338   case frontend::FixIt:                  return "-fixit";
339   case frontend::GeneratePCH:            return "-emit-pch";
340   case frontend::GeneratePTH:            return "-emit-pth";
341   case frontend::InitOnly:               return "-init-only";
342   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
343   case frontend::PrintDeclContext:       return "-print-decl-contexts";
344   case frontend::PrintPreamble:          return "-print-preamble";
345   case frontend::PrintPreprocessedInput: return "-E";
346   case frontend::RewriteMacros:          return "-rewrite-macros";
347   case frontend::RewriteObjC:            return "-rewrite-objc";
348   case frontend::RewriteTest:            return "-rewrite-test";
349   case frontend::RunAnalysis:            return "-analyze";
350   case frontend::RunPreprocessorOnly:    return "-Eonly";
351   }
352 
353   llvm_unreachable("Unexpected language kind!");
354   return 0;
355 }
356 
357 static void FileSystemOptsToArgs(const FileSystemOptions &Opts,
358                                  std::vector<std::string> &Res) {
359   if (!Opts.WorkingDir.empty()) {
360     Res.push_back("-working-directory");
361     Res.push_back(Opts.WorkingDir);
362   }
363 }
364 
365 static void FrontendOptsToArgs(const FrontendOptions &Opts,
366                                std::vector<std::string> &Res) {
367   if (Opts.DisableFree)
368     Res.push_back("-disable-free");
369   if (Opts.RelocatablePCH)
370     Res.push_back("-relocatable-pch");
371   if (Opts.ChainedPCH)
372     Res.push_back("-chained-pch");
373   if (Opts.ShowHelp)
374     Res.push_back("-help");
375   if (Opts.ShowMacrosInCodeCompletion)
376     Res.push_back("-code-completion-macros");
377   if (Opts.ShowCodePatternsInCodeCompletion)
378     Res.push_back("-code-completion-patterns");
379   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
380     Res.push_back("-no-code-completion-globals");
381   if (Opts.ShowStats)
382     Res.push_back("-print-stats");
383   if (Opts.ShowTimers)
384     Res.push_back("-ftime-report");
385   if (Opts.ShowVersion)
386     Res.push_back("-version");
387   if (Opts.FixWhatYouCan)
388     Res.push_back("-fix-what-you-can");
389 
390   bool NeedLang = false;
391   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
392     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
393         Opts.Inputs[i].first)
394       NeedLang = true;
395   if (NeedLang) {
396     Res.push_back("-x");
397     Res.push_back(getInputKindName(Opts.Inputs[0].first));
398   }
399   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
400     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
401            "Unable to represent this input vector!");
402     Res.push_back(Opts.Inputs[i].second);
403   }
404 
405   if (!Opts.OutputFile.empty()) {
406     Res.push_back("-o");
407     Res.push_back(Opts.OutputFile);
408   }
409   if (!Opts.ViewClassInheritance.empty()) {
410     Res.push_back("-cxx-inheritance-view");
411     Res.push_back(Opts.ViewClassInheritance);
412   }
413   if (!Opts.CodeCompletionAt.FileName.empty()) {
414     Res.push_back("-code-completion-at");
415     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
416                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
417                   llvm::utostr(Opts.CodeCompletionAt.Column));
418   }
419   if (Opts.ProgramAction != frontend::InheritanceView &&
420       Opts.ProgramAction != frontend::PluginAction)
421     Res.push_back(getActionName(Opts.ProgramAction));
422   if (!Opts.ActionName.empty()) {
423     Res.push_back("-plugin");
424     Res.push_back(Opts.ActionName);
425     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
426       Res.push_back("-plugin-arg-" + Opts.ActionName);
427       Res.push_back(Opts.PluginArgs[i]);
428     }
429   }
430   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
431     Res.push_back("-load");
432     Res.push_back(Opts.Plugins[i]);
433   }
434   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
435     Res.push_back("-ast-merge");
436     Res.push_back(Opts.ASTMergeFiles[i]);
437   }
438   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
439     Res.push_back("-import-module");
440     Res.push_back(Opts.Modules[i]);
441   }
442   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
443     Res.push_back("-mllvm");
444     Res.push_back(Opts.LLVMArgs[i]);
445   }
446 }
447 
448 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
449                                    std::vector<std::string> &Res) {
450   if (Opts.Sysroot != "/") {
451     Res.push_back("-isysroot");
452     Res.push_back(Opts.Sysroot);
453   }
454 
455   for (unsigned i = 0, e = Opts.CXXSystemIncludes.size(); i != e; ++i) {
456     Res.push_back("-cxx-system-include");
457     Res.push_back(Opts.CXXSystemIncludes[i]);
458   }
459 
460   /// User specified include entries.
461   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
462     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
463     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
464       llvm::report_fatal_error("Invalid option set!");
465     if (E.IsUserSupplied) {
466       if (E.Group == frontend::After) {
467         Res.push_back("-idirafter");
468       } else if (E.Group == frontend::Quoted) {
469         Res.push_back("-iquote");
470       } else if (E.Group == frontend::System) {
471         Res.push_back("-isystem");
472       } else {
473         assert(E.Group == frontend::Angled && "Invalid group!");
474         Res.push_back(E.IsFramework ? "-F" : "-I");
475       }
476     } else {
477       if (E.Group != frontend::Angled && E.Group != frontend::System)
478         llvm::report_fatal_error("Invalid option set!");
479       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
480                     "-iwithprefix");
481     }
482     Res.push_back(E.Path);
483   }
484 
485   if (!Opts.EnvIncPath.empty()) {
486     // FIXME: Provide an option for this, and move env detection to driver.
487     llvm::report_fatal_error("Not yet implemented!");
488   }
489   if (!Opts.CEnvIncPath.empty()) {
490     // FIXME: Provide an option for this, and move env detection to driver.
491     llvm::report_fatal_error("Not yet implemented!");
492   }
493   if (!Opts.ObjCEnvIncPath.empty()) {
494     // FIXME: Provide an option for this, and move env detection to driver.
495     llvm::report_fatal_error("Not yet implemented!");
496   }
497   if (!Opts.CXXEnvIncPath.empty()) {
498     // FIXME: Provide an option for this, and move env detection to driver.
499     llvm::report_fatal_error("Not yet implemented!");
500   }
501   if (!Opts.ObjCXXEnvIncPath.empty()) {
502     // FIXME: Provide an option for this, and move env detection to driver.
503     llvm::report_fatal_error("Not yet implemented!");
504   }
505   if (!Opts.ResourceDir.empty()) {
506     Res.push_back("-resource-dir");
507     Res.push_back(Opts.ResourceDir);
508   }
509   if (!Opts.UseStandardIncludes)
510     Res.push_back("-nostdinc");
511   if (!Opts.UseStandardCXXIncludes)
512     Res.push_back("-nostdinc++");
513   if (Opts.Verbose)
514     Res.push_back("-v");
515 }
516 
517 static void LangOptsToArgs(const LangOptions &Opts,
518                            std::vector<std::string> &Res) {
519   LangOptions DefaultLangOpts;
520 
521   // FIXME: Need to set -std to get all the implicit options.
522 
523   // FIXME: We want to only pass options relative to the defaults, which
524   // requires constructing a target. :(
525   //
526   // It would be better to push the all target specific choices into the driver,
527   // so that everything below that was more uniform.
528 
529   if (Opts.Trigraphs)
530     Res.push_back("-trigraphs");
531   // Implicit based on the input kind:
532   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
533   // Implicit based on the input language standard:
534   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
535   if (Opts.DollarIdents)
536     Res.push_back("-fdollars-in-identifiers");
537   if (Opts.GNUMode && !Opts.GNUKeywords)
538     Res.push_back("-fno-gnu-keywords");
539   if (!Opts.GNUMode && Opts.GNUKeywords)
540     Res.push_back("-fgnu-keywords");
541   if (Opts.Microsoft)
542     Res.push_back("-fms-extensions");
543   if (Opts.MSCVersion != 0)
544     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
545   if (Opts.Borland)
546     Res.push_back("-fborland-extensions");
547   if (Opts.ObjCNonFragileABI)
548     Res.push_back("-fobjc-nonfragile-abi");
549   if (Opts.ObjCNonFragileABI2)
550     Res.push_back("-fobjc-nonfragile-abi2");
551   // NoInline is implicit.
552   if (!Opts.CXXOperatorNames)
553     Res.push_back("-fno-operator-names");
554   if (Opts.PascalStrings)
555     Res.push_back("-fpascal-strings");
556   if (Opts.CatchUndefined)
557     Res.push_back("-fcatch-undefined-behavior");
558   if (Opts.WritableStrings)
559     Res.push_back("-fwritable-strings");
560   if (Opts.ConstStrings)
561     Res.push_back("-Wwrite-strings");
562   if (!Opts.LaxVectorConversions)
563     Res.push_back("-fno-lax-vector-conversions");
564   if (Opts.AltiVec)
565     Res.push_back("-faltivec");
566   if (Opts.Exceptions)
567     Res.push_back("-fexceptions");
568   if (Opts.SjLjExceptions)
569     Res.push_back("-fsjlj-exceptions");
570   if (!Opts.RTTI)
571     Res.push_back("-fno-rtti");
572   if (!Opts.NeXTRuntime)
573     Res.push_back("-fgnu-runtime");
574   if (Opts.Freestanding)
575     Res.push_back("-ffreestanding");
576   if (Opts.NoBuiltin)
577     Res.push_back("-fno-builtin");
578   if (!Opts.AssumeSaneOperatorNew)
579     Res.push_back("-fno-assume-sane-operator-new");
580   if (!Opts.ThreadsafeStatics)
581     Res.push_back("-fno-threadsafe-statics");
582   if (Opts.POSIXThreads)
583     Res.push_back("-pthread");
584   if (Opts.Blocks)
585     Res.push_back("-fblocks");
586   if (Opts.EmitAllDecls)
587     Res.push_back("-femit-all-decls");
588   if (Opts.MathErrno)
589     Res.push_back("-fmath-errno");
590   switch (Opts.getSignedOverflowBehavior()) {
591   case LangOptions::SOB_Undefined: break;
592   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
593   case LangOptions::SOB_Trapping:
594     Res.push_back("-ftrapv"); break;
595     if (!Opts.OverflowHandler.empty()) {
596       Res.push_back("-ftrapv-handler");
597       Res.push_back(Opts.OverflowHandler);
598     }
599   }
600   if (Opts.HeinousExtensions)
601     Res.push_back("-fheinous-gnu-extensions");
602   // Optimize is implicit.
603   // OptimizeSize is implicit.
604   if (Opts.Static)
605     Res.push_back("-static-define");
606   if (Opts.DumpRecordLayouts)
607     Res.push_back("-fdump-record-layouts");
608   if (Opts.DumpVTableLayouts)
609     Res.push_back("-fdump-vtable-layouts");
610   if (Opts.NoBitFieldTypeAlign)
611     Res.push_back("-fno-bitfield-type-alignment");
612   if (Opts.SjLjExceptions)
613     Res.push_back("-fsjlj-exceptions");
614   if (Opts.PICLevel) {
615     Res.push_back("-pic-level");
616     Res.push_back(llvm::utostr(Opts.PICLevel));
617   }
618   if (Opts.ObjCGCBitmapPrint)
619     Res.push_back("-print-ivar-layout");
620   if (Opts.NoConstantCFStrings)
621     Res.push_back("-fno-constant-cfstrings");
622   if (!Opts.AccessControl)
623     Res.push_back("-fno-access-control");
624   if (!Opts.CharIsSigned)
625     Res.push_back("-fno-signed-char");
626   if (Opts.ShortWChar)
627     Res.push_back("-fshort-wchar");
628   if (!Opts.ElideConstructors)
629     Res.push_back("-fno-elide-constructors");
630   if (Opts.getGCMode() != LangOptions::NonGC) {
631     if (Opts.getGCMode() == LangOptions::HybridGC) {
632       Res.push_back("-fobjc-gc");
633     } else {
634       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
635       Res.push_back("-fobjc-gc-only");
636     }
637   }
638   if (Opts.getVisibilityMode() != DefaultVisibility) {
639     Res.push_back("-fvisibility");
640     if (Opts.getVisibilityMode() == HiddenVisibility) {
641       Res.push_back("hidden");
642     } else {
643       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
644              "Invalid visibility!");
645       Res.push_back("protected");
646     }
647   }
648   if (Opts.InlineVisibilityHidden)
649     Res.push_back("-fvisibility-inlines-hidden");
650 
651   if (Opts.getStackProtectorMode() != 0) {
652     Res.push_back("-stack-protector");
653     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
654   }
655   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
656     Res.push_back("-ftemplate-depth");
657     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
658   }
659   if (!Opts.ObjCConstantStringClass.empty()) {
660     Res.push_back("-fconstant-string-class");
661     Res.push_back(Opts.ObjCConstantStringClass);
662   }
663 }
664 
665 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
666                                    std::vector<std::string> &Res) {
667   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
668     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
669                   Opts.Macros[i].first);
670   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
671     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
672     Res.push_back("-include");
673     Res.push_back(Opts.Includes[i]);
674   }
675   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
676     Res.push_back("-imacros");
677     Res.push_back(Opts.MacroIncludes[i]);
678   }
679   if (!Opts.UsePredefines)
680     Res.push_back("-undef");
681   if (Opts.DetailedRecord)
682     Res.push_back("-detailed-preprocessing-record");
683   if (!Opts.ImplicitPCHInclude.empty()) {
684     Res.push_back("-include-pch");
685     Res.push_back(Opts.ImplicitPCHInclude);
686   }
687   if (!Opts.ImplicitPTHInclude.empty()) {
688     Res.push_back("-include-pth");
689     Res.push_back(Opts.ImplicitPTHInclude);
690   }
691   if (!Opts.TokenCache.empty()) {
692     if (Opts.ImplicitPTHInclude.empty()) {
693       Res.push_back("-token-cache");
694       Res.push_back(Opts.TokenCache);
695     } else
696       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
697              "Unsupported option combination!");
698   }
699   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
700     Res.push_back("-remap-file");
701     Res.push_back(Opts.RemappedFiles[i].first + ";" +
702                   Opts.RemappedFiles[i].second);
703   }
704 }
705 
706 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
707                                          std::vector<std::string> &Res) {
708   if (!Opts.ShowCPP && !Opts.ShowMacros)
709     llvm::report_fatal_error("Invalid option combination!");
710 
711   if (Opts.ShowCPP && Opts.ShowMacros)
712     Res.push_back("-dD");
713   else if (!Opts.ShowCPP && Opts.ShowMacros)
714     Res.push_back("-dM");
715 
716   if (Opts.ShowHeaderIncludes)
717     Res.push_back("-H");
718   if (!Opts.ShowLineMarkers)
719     Res.push_back("-P");
720   if (Opts.ShowComments)
721     Res.push_back("-C");
722   if (Opts.ShowMacroComments)
723     Res.push_back("-CC");
724 }
725 
726 static void TargetOptsToArgs(const TargetOptions &Opts,
727                              std::vector<std::string> &Res) {
728   Res.push_back("-triple");
729   Res.push_back(Opts.Triple);
730   if (!Opts.CPU.empty()) {
731     Res.push_back("-target-cpu");
732     Res.push_back(Opts.CPU);
733   }
734   if (!Opts.ABI.empty()) {
735     Res.push_back("-target-abi");
736     Res.push_back(Opts.ABI);
737   }
738   if (!Opts.LinkerVersion.empty()) {
739     Res.push_back("-target-linker-version");
740     Res.push_back(Opts.LinkerVersion);
741   }
742   if (!Opts.CXXABI.empty()) {
743     Res.push_back("-cxx-abi");
744     Res.push_back(Opts.CXXABI);
745   }
746   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
747     Res.push_back("-target-feature");
748     Res.push_back(Opts.Features[i]);
749   }
750 }
751 
752 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
753   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
754   CodeGenOptsToArgs(getCodeGenOpts(), Res);
755   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
756   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
757   FileSystemOptsToArgs(getFileSystemOpts(), Res);
758   FrontendOptsToArgs(getFrontendOpts(), Res);
759   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
760   LangOptsToArgs(getLangOpts(), Res);
761   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
762   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
763   TargetOptsToArgs(getTargetOpts(), Res);
764 }
765 
766 //===----------------------------------------------------------------------===//
767 // Deserialization (to args)
768 //===----------------------------------------------------------------------===//
769 
770 using namespace clang::driver;
771 using namespace clang::driver::cc1options;
772 
773 //
774 
775 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
776                                      Diagnostic &Diags) {
777   unsigned DefaultOpt = 0;
778   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
779     DefaultOpt = 2;
780   // -Os implies -O2
781   return Args.hasArg(OPT_Os) ? 2 :
782     Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
783 }
784 
785 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
786                               Diagnostic &Diags) {
787   using namespace cc1options;
788 
789   Opts.AnalysisList.clear();
790 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
791   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
792 #include "clang/Frontend/Analyses.def"
793 
794   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
795     llvm::StringRef Name = A->getValue(Args);
796     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
797 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
798       .Case(CMDFLAG, NAME##Model)
799 #include "clang/Frontend/Analyses.def"
800       .Default(NumStores);
801     // FIXME: Error handling.
802     if (Value == NumStores)
803       Diags.Report(diag::err_drv_invalid_value)
804         << A->getAsString(Args) << Name;
805     else
806       Opts.AnalysisStoreOpt = Value;
807   }
808 
809   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
810     llvm::StringRef Name = A->getValue(Args);
811     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
812 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
813       .Case(CMDFLAG, NAME##Model)
814 #include "clang/Frontend/Analyses.def"
815       .Default(NumConstraints);
816     // FIXME: Error handling.
817     if (Value == NumConstraints)
818       Diags.Report(diag::err_drv_invalid_value)
819         << A->getAsString(Args) << Name;
820     else
821       Opts.AnalysisConstraintsOpt = Value;
822   }
823 
824   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
825     llvm::StringRef Name = A->getValue(Args);
826     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
827 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
828       .Case(CMDFLAG, PD_##NAME)
829 #include "clang/Frontend/Analyses.def"
830       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
831     // FIXME: Error handling.
832     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
833       Diags.Report(diag::err_drv_invalid_value)
834         << A->getAsString(Args) << Name;
835     else
836       Opts.AnalysisDiagOpt = Value;
837   }
838 
839   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
840   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
841   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
842   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
843   Opts.AnalyzeNestedBlocks =
844     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
845   Opts.AnalyzerStats = Args.hasArg(OPT_analysis_AnalyzerStats);
846   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
847   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
848   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
849   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
850   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
851   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
852   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
853   Opts.EnableExperimentalInternalChecks =
854     Args.hasArg(OPT_analyzer_experimental_internal_checks);
855   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
856   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
857   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
858   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
859   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
860 }
861 
862 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
863                              Diagnostic &Diags) {
864   using namespace cc1options;
865 
866   Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
867   if (Opts.OptimizationLevel > 3) {
868     Diags.Report(diag::err_drv_invalid_value)
869       << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
870     Opts.OptimizationLevel = 3;
871   }
872 
873   // We must always run at least the always inlining pass.
874   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
875     : CodeGenOptions::OnlyAlwaysInlining;
876 
877   Opts.DebugInfo = Args.hasArg(OPT_g);
878   Opts.LimitDebugInfo = Args.hasArg(OPT_flimit_debug_info);
879   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
880   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
881   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
882   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
883   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
884   Opts.NoCommon = Args.hasArg(OPT_fno_common);
885   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
886   Opts.OptimizeSize = Args.hasArg(OPT_Os);
887   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
888                             Args.hasArg(OPT_ffreestanding));
889   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
890                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
891 
892   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
893   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
894   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
895   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
896   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
897   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
898   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
899   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
900   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
901   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
902   Opts.NoInfsFPMath = Opts.NoNaNsFPMath = Args.hasArg(OPT_cl_finite_math_only)||
903                                           Args.hasArg(OPT_cl_fast_relaxed_math);
904   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
905   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
906   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
907   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
908   Opts.UnsafeFPMath = Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
909                       Args.hasArg(OPT_cl_fast_relaxed_math);
910   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
911   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
912 
913   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
914   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
915 
916   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
917   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
918 
919   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
920 
921   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
922     llvm::StringRef Name = A->getValue(Args);
923     unsigned Method = llvm::StringSwitch<unsigned>(Name)
924       .Case("legacy", CodeGenOptions::Legacy)
925       .Case("non-legacy", CodeGenOptions::NonLegacy)
926       .Case("mixed", CodeGenOptions::Mixed)
927       .Default(~0U);
928     if (Method == ~0U)
929       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
930     else
931       Opts.ObjCDispatchMethod = Method;
932   }
933 }
934 
935 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
936                                       ArgList &Args) {
937   using namespace cc1options;
938   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
939   Opts.Targets = Args.getAllArgValues(OPT_MT);
940   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
941   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
942 }
943 
944 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
945                                 Diagnostic &Diags) {
946   using namespace cc1options;
947   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
948   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
949   Opts.Pedantic = Args.hasArg(OPT_pedantic);
950   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
951   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
952   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
953   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
954   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
955   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
956   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
957 
958   llvm::StringRef ShowOverloads =
959     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
960   if (ShowOverloads == "best")
961     Opts.ShowOverloads = Diagnostic::Ovl_Best;
962   else if (ShowOverloads == "all")
963     Opts.ShowOverloads = Diagnostic::Ovl_All;
964   else
965     Diags.Report(diag::err_drv_invalid_value)
966       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
967       << ShowOverloads;
968 
969   llvm::StringRef ShowCategory =
970     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
971   if (ShowCategory == "none")
972     Opts.ShowCategories = 0;
973   else if (ShowCategory == "id")
974     Opts.ShowCategories = 1;
975   else if (ShowCategory == "name")
976     Opts.ShowCategories = 2;
977   else
978     Diags.Report(diag::err_drv_invalid_value)
979       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
980       << ShowCategory;
981 
982   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
983   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
984   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
985   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
986   Opts.MacroBacktraceLimit
987     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
988                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
989   Opts.TemplateBacktraceLimit
990     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
991                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
992                          Diags);
993   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
994                                     DiagnosticOptions::DefaultTabStop, Diags);
995   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
996     Diags.Report(diag::warn_ignoring_ftabstop_value)
997       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
998     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
999   }
1000   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1001   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1002   Opts.Warnings = Args.getAllArgValues(OPT_W);
1003 }
1004 
1005 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1006   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1007 }
1008 
1009 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1010                                    Diagnostic &Diags) {
1011   using namespace cc1options;
1012   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1013   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1014     switch (A->getOption().getID()) {
1015     default:
1016       assert(0 && "Invalid option in group!");
1017     case OPT_ast_dump:
1018       Opts.ProgramAction = frontend::ASTDump; break;
1019     case OPT_ast_dump_xml:
1020       Opts.ProgramAction = frontend::ASTDumpXML; break;
1021     case OPT_ast_print:
1022       Opts.ProgramAction = frontend::ASTPrint; break;
1023     case OPT_ast_print_xml:
1024       Opts.ProgramAction = frontend::ASTPrintXML; break;
1025     case OPT_ast_view:
1026       Opts.ProgramAction = frontend::ASTView; break;
1027     case OPT_boostcon:
1028       Opts.ProgramAction = frontend::BoostCon; break;
1029     case OPT_dump_raw_tokens:
1030       Opts.ProgramAction = frontend::DumpRawTokens; break;
1031     case OPT_dump_tokens:
1032       Opts.ProgramAction = frontend::DumpTokens; break;
1033     case OPT_S:
1034       Opts.ProgramAction = frontend::EmitAssembly; break;
1035     case OPT_emit_llvm_bc:
1036       Opts.ProgramAction = frontend::EmitBC; break;
1037     case OPT_emit_html:
1038       Opts.ProgramAction = frontend::EmitHTML; break;
1039     case OPT_emit_llvm:
1040       Opts.ProgramAction = frontend::EmitLLVM; break;
1041     case OPT_emit_llvm_only:
1042       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1043     case OPT_emit_codegen_only:
1044       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1045     case OPT_emit_obj:
1046       Opts.ProgramAction = frontend::EmitObj; break;
1047     case OPT_fixit_EQ:
1048       Opts.FixItSuffix = A->getValue(Args);
1049       // fall-through!
1050     case OPT_fixit:
1051       Opts.ProgramAction = frontend::FixIt; break;
1052     case OPT_emit_pch:
1053       Opts.ProgramAction = frontend::GeneratePCH; break;
1054     case OPT_emit_pth:
1055       Opts.ProgramAction = frontend::GeneratePTH; break;
1056     case OPT_init_only:
1057       Opts.ProgramAction = frontend::InitOnly; break;
1058     case OPT_fsyntax_only:
1059       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1060     case OPT_print_decl_contexts:
1061       Opts.ProgramAction = frontend::PrintDeclContext; break;
1062     case OPT_print_preamble:
1063       Opts.ProgramAction = frontend::PrintPreamble; break;
1064     case OPT_E:
1065       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1066     case OPT_rewrite_macros:
1067       Opts.ProgramAction = frontend::RewriteMacros; break;
1068     case OPT_rewrite_objc:
1069       Opts.ProgramAction = frontend::RewriteObjC; break;
1070     case OPT_rewrite_test:
1071       Opts.ProgramAction = frontend::RewriteTest; break;
1072     case OPT_analyze:
1073       Opts.ProgramAction = frontend::RunAnalysis; break;
1074     case OPT_Eonly:
1075       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1076     case OPT_create_module:
1077       Opts.ProgramAction = frontend::CreateModule; break;
1078     }
1079   }
1080 
1081   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1082     Opts.Plugins.push_back(A->getValue(Args,0));
1083     Opts.ProgramAction = frontend::PluginAction;
1084     Opts.ActionName = A->getValue(Args);
1085 
1086     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1087            end = Args.filtered_end(); it != end; ++it) {
1088       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1089         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1090     }
1091   }
1092 
1093   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1094     Opts.CodeCompletionAt =
1095       ParsedSourceLocation::FromString(A->getValue(Args));
1096     if (Opts.CodeCompletionAt.FileName.empty())
1097       Diags.Report(diag::err_drv_invalid_value)
1098         << A->getAsString(Args) << A->getValue(Args);
1099   }
1100   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1101 
1102   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1103   Opts.Plugins = Args.getAllArgValues(OPT_load);
1104   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1105   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1106   Opts.ShowHelp = Args.hasArg(OPT_help);
1107   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1108   Opts.ShowCodePatternsInCodeCompletion
1109     = Args.hasArg(OPT_code_completion_patterns);
1110   Opts.ShowGlobalSymbolsInCodeCompletion
1111     = !Args.hasArg(OPT_no_code_completion_globals);
1112   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1113   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1114   Opts.ShowVersion = Args.hasArg(OPT_version);
1115   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1116   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1117   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1118   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1119   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1120 
1121   InputKind DashX = IK_None;
1122   if (const Arg *A = Args.getLastArg(OPT_x)) {
1123     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1124       .Case("c", IK_C)
1125       .Case("cl", IK_OpenCL)
1126       .Case("c", IK_C)
1127       .Case("cl", IK_OpenCL)
1128       .Case("cuda", IK_CUDA)
1129       .Case("c++", IK_CXX)
1130       .Case("objective-c", IK_ObjC)
1131       .Case("objective-c++", IK_ObjCXX)
1132       .Case("cpp-output", IK_PreprocessedC)
1133       .Case("assembler-with-cpp", IK_Asm)
1134       .Case("c++-cpp-output", IK_PreprocessedCXX)
1135       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1136       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1137       .Case("c-header", IK_C)
1138       .Case("objective-c-header", IK_ObjC)
1139       .Case("c++-header", IK_CXX)
1140       .Case("objective-c++-header", IK_ObjCXX)
1141       .Case("ast", IK_AST)
1142       .Case("ir", IK_LLVM_IR)
1143       .Default(IK_None);
1144     if (DashX == IK_None)
1145       Diags.Report(diag::err_drv_invalid_value)
1146         << A->getAsString(Args) << A->getValue(Args);
1147   }
1148 
1149   // '-' is the default input if none is given.
1150   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1151   Opts.Inputs.clear();
1152   if (Inputs.empty())
1153     Inputs.push_back("-");
1154   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1155     InputKind IK = DashX;
1156     if (IK == IK_None) {
1157       IK = FrontendOptions::getInputKindForExtension(
1158         llvm::StringRef(Inputs[i]).rsplit('.').second);
1159       // FIXME: Remove this hack.
1160       if (i == 0)
1161         DashX = IK;
1162     }
1163     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1164   }
1165 
1166   return DashX;
1167 }
1168 
1169 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1170                                                  void *MainAddr) {
1171   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1172 
1173   if (!P.isEmpty()) {
1174     P.eraseComponent();  // Remove /clang from foo/bin/clang
1175     P.eraseComponent();  // Remove /bin   from foo/bin
1176 
1177     // Get foo/lib/clang/<version>/include
1178     P.appendComponent("lib");
1179     P.appendComponent("clang");
1180     P.appendComponent(CLANG_VERSION_STRING);
1181   }
1182 
1183   return P.str();
1184 }
1185 
1186 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1187   using namespace cc1options;
1188   Opts.CXXSystemIncludes = Args.getAllArgValues(OPT_cxx_system_include);
1189   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1190   Opts.Verbose = Args.hasArg(OPT_v);
1191   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1192   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1193   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1194   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1195 
1196   // Add -I... and -F... options in order.
1197   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1198          ie = Args.filtered_end(); it != ie; ++it)
1199     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1200                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1201 
1202   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1203   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1204   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1205                                              OPT_iwithprefixbefore),
1206          ie = Args.filtered_end(); it != ie; ++it) {
1207     const Arg *A = *it;
1208     if (A->getOption().matches(OPT_iprefix))
1209       Prefix = A->getValue(Args);
1210     else if (A->getOption().matches(OPT_iwithprefix))
1211       Opts.AddPath(Prefix.str() + A->getValue(Args),
1212                    frontend::System, false, false, true);
1213     else
1214       Opts.AddPath(Prefix.str() + A->getValue(Args),
1215                    frontend::Angled, false, false, true);
1216   }
1217 
1218   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1219          ie = Args.filtered_end(); it != ie; ++it)
1220     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1221   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1222          ie = Args.filtered_end(); it != ie; ++it)
1223     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1224   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1225          ie = Args.filtered_end(); it != ie; ++it)
1226     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1227                  (*it)->getOption().matches(OPT_iwithsysroot));
1228 
1229   // FIXME: Need options for the various environment variables!
1230 }
1231 
1232 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1233                                          LangStandard::Kind LangStd) {
1234   // Set some properties which depend soley on the input kind; it would be nice
1235   // to move these to the language standard, and have the driver resolve the
1236   // input kind + language standard.
1237   if (IK == IK_Asm) {
1238     Opts.AsmPreprocessor = 1;
1239   } else if (IK == IK_ObjC ||
1240              IK == IK_ObjCXX ||
1241              IK == IK_PreprocessedObjC ||
1242              IK == IK_PreprocessedObjCXX) {
1243     Opts.ObjC1 = Opts.ObjC2 = 1;
1244   }
1245 
1246   if (LangStd == LangStandard::lang_unspecified) {
1247     // Based on the base language, pick one.
1248     switch (IK) {
1249     case IK_None:
1250     case IK_AST:
1251     case IK_LLVM_IR:
1252       assert(0 && "Invalid input kind!");
1253     case IK_OpenCL:
1254       LangStd = LangStandard::lang_opencl;
1255       break;
1256     case IK_CUDA:
1257       LangStd = LangStandard::lang_cuda;
1258       break;
1259     case IK_Asm:
1260     case IK_C:
1261     case IK_PreprocessedC:
1262     case IK_ObjC:
1263     case IK_PreprocessedObjC:
1264       LangStd = LangStandard::lang_gnu99;
1265       break;
1266     case IK_CXX:
1267     case IK_PreprocessedCXX:
1268     case IK_ObjCXX:
1269     case IK_PreprocessedObjCXX:
1270       LangStd = LangStandard::lang_gnucxx98;
1271       break;
1272     }
1273   }
1274 
1275   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1276   Opts.BCPLComment = Std.hasBCPLComments();
1277   Opts.C99 = Std.isC99();
1278   Opts.CPlusPlus = Std.isCPlusPlus();
1279   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1280   Opts.Digraphs = Std.hasDigraphs();
1281   Opts.GNUMode = Std.isGNUMode();
1282   Opts.GNUInline = !Std.isC99();
1283   Opts.HexFloats = Std.hasHexFloats();
1284   Opts.ImplicitInt = Std.hasImplicitInt();
1285 
1286   // OpenCL has some additional defaults.
1287   if (LangStd == LangStandard::lang_opencl) {
1288     Opts.OpenCL = 1;
1289     Opts.AltiVec = 1;
1290     Opts.CXXOperatorNames = 1;
1291     Opts.LaxVectorConversions = 1;
1292   }
1293 
1294   if (LangStd == LangStandard::lang_cuda)
1295     Opts.CUDA = 1;
1296 
1297   // OpenCL and C++ both have bool, true, false keywords.
1298   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1299 
1300   Opts.GNUKeywords = Opts.GNUMode;
1301   Opts.CXXOperatorNames = Opts.CPlusPlus;
1302 
1303   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1304   // is specified, or -std is set to a conforming mode.
1305   Opts.Trigraphs = !Opts.GNUMode;
1306 
1307   Opts.DollarIdents = !Opts.AsmPreprocessor;
1308 }
1309 
1310 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1311                           Diagnostic &Diags) {
1312   // FIXME: Cleanup per-file based stuff.
1313   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1314   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1315     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1316 #define LANGSTANDARD(id, name, desc, features) \
1317       .Case(name, LangStandard::lang_##id)
1318 #include "clang/Frontend/LangStandards.def"
1319       .Default(LangStandard::lang_unspecified);
1320     if (LangStd == LangStandard::lang_unspecified)
1321       Diags.Report(diag::err_drv_invalid_value)
1322         << A->getAsString(Args) << A->getValue(Args);
1323   }
1324 
1325   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1326     if (strcmp(A->getValue(Args), "CL1.1") != 0) {
1327       Diags.Report(diag::err_drv_invalid_value)
1328         << A->getAsString(Args) << A->getValue(Args);
1329     }
1330   }
1331 
1332   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1333 
1334   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1335   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1336   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1337   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1338   // name, as it doesn't seem a useful distinction.
1339   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1340                                   Opts.GNUKeywords);
1341 
1342   if (Args.hasArg(OPT_fno_operator_names))
1343     Opts.CXXOperatorNames = 0;
1344 
1345   if (Args.hasArg(OPT_fobjc_gc_only))
1346     Opts.setGCMode(LangOptions::GCOnly);
1347   else if (Args.hasArg(OPT_fobjc_gc))
1348     Opts.setGCMode(LangOptions::HybridGC);
1349 
1350   if (Args.hasArg(OPT_print_ivar_layout))
1351     Opts.ObjCGCBitmapPrint = 1;
1352   if (Args.hasArg(OPT_fno_constant_cfstrings))
1353     Opts.NoConstantCFStrings = 1;
1354 
1355   if (Args.hasArg(OPT_faltivec))
1356     Opts.AltiVec = 1;
1357 
1358   if (Args.hasArg(OPT_pthread))
1359     Opts.POSIXThreads = 1;
1360 
1361   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1362   if (Vis == "default")
1363     Opts.setVisibilityMode(DefaultVisibility);
1364   else if (Vis == "hidden")
1365     Opts.setVisibilityMode(HiddenVisibility);
1366   else if (Vis == "protected")
1367     Opts.setVisibilityMode(ProtectedVisibility);
1368   else
1369     Diags.Report(diag::err_drv_invalid_value)
1370       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1371 
1372   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1373     Opts.InlineVisibilityHidden = 1;
1374 
1375   if (Args.hasArg(OPT_ftrapv)) {
1376     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1377     // Set the handler, if one is specified.
1378     Opts.OverflowHandler =
1379         Args.getLastArgValue(OPT_ftrapv_handler);
1380   }
1381   else if (Args.hasArg(OPT_fwrapv))
1382     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1383 
1384   if (Args.hasArg(OPT_trigraphs))
1385     Opts.Trigraphs = 1;
1386 
1387   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1388                                    OPT_fno_dollars_in_identifiers,
1389                                    Opts.DollarIdents);
1390   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1391   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1392   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1393   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1394   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1395   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1396   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1397     Opts.LaxVectorConversions = 0;
1398   if (Args.hasArg(OPT_fno_threadsafe_statics))
1399     Opts.ThreadsafeStatics = 0;
1400   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1401   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1402   Opts.Blocks = Args.hasArg(OPT_fblocks);
1403   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1404   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1405   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1406   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1407   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1408   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1409   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1410   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1411   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1412   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1413   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1414                                                Diags);
1415   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
1416                                                     0, Diags);
1417   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1418   Opts.ObjCConstantStringClass =
1419     Args.getLastArgValue(OPT_fconstant_string_class);
1420   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1421   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1422   if (Opts.ObjCNonFragileABI2)
1423     Opts.ObjCNonFragileABI = true;
1424   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1425   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1426   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1427   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1428   Opts.Static = Args.hasArg(OPT_static_define);
1429   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1430   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1431   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1432   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1433   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1434   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1435   Opts.OptimizeSize = 0;
1436 
1437   // FIXME: Eliminate this dependency.
1438   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
1439   Opts.Optimize = Opt != 0;
1440 
1441   // This is the __NO_INLINE__ define, which just depends on things like the
1442   // optimization level and -fno-inline, not actually whether the backend has
1443   // inlining enabled.
1444   //
1445   // FIXME: This is affected by other options (-fno-inline).
1446   Opts.NoInline = !Opt;
1447 
1448   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1449   switch (SSP) {
1450   default:
1451     Diags.Report(diag::err_drv_invalid_value)
1452       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1453     break;
1454   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1455   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1456   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1457   }
1458 }
1459 
1460 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1461                                   FileManager &FileMgr,
1462                                   Diagnostic &Diags) {
1463   using namespace cc1options;
1464   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1465   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1466   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1467       Opts.TokenCache = A->getValue(Args);
1468   else
1469     Opts.TokenCache = Opts.ImplicitPTHInclude;
1470   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1471   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1472   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1473 
1474   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1475   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1476          ie = Args.filtered_end(); it != ie; ++it) {
1477     const Arg *A = *it;
1478     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
1479   }
1480 
1481   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1482     llvm::StringRef Value(A->getValue(Args));
1483     size_t Comma = Value.find(',');
1484     unsigned Bytes = 0;
1485     unsigned EndOfLine = 0;
1486 
1487     if (Comma == llvm::StringRef::npos ||
1488         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1489         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1490       Diags.Report(diag::err_drv_preamble_format);
1491     else {
1492       Opts.PrecompiledPreambleBytes.first = Bytes;
1493       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1494     }
1495   }
1496 
1497   // Add macros from the command line.
1498   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1499          ie = Args.filtered_end(); it != ie; ++it) {
1500     if ((*it)->getOption().matches(OPT_D))
1501       Opts.addMacroDef((*it)->getValue(Args));
1502     else
1503       Opts.addMacroUndef((*it)->getValue(Args));
1504   }
1505 
1506   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1507 
1508   // Add the ordered list of -includes.
1509   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1510                                              OPT_include_pth),
1511          ie = Args.filtered_end(); it != ie; ++it) {
1512     const Arg *A = *it;
1513     // PCH is handled specially, we need to extra the original include path.
1514     if (A->getOption().matches(OPT_include_pch)) {
1515       std::string OriginalFile =
1516         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
1517       if (OriginalFile.empty())
1518         continue;
1519 
1520       Opts.Includes.push_back(OriginalFile);
1521     } else
1522       Opts.Includes.push_back(A->getValue(Args));
1523   }
1524 
1525   // Include 'altivec.h' if -faltivec option present
1526   if (Args.hasArg(OPT_faltivec))
1527     Opts.Includes.push_back("altivec.h");
1528 
1529   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1530          ie = Args.filtered_end(); it != ie; ++it) {
1531     const Arg *A = *it;
1532     std::pair<llvm::StringRef,llvm::StringRef> Split =
1533       llvm::StringRef(A->getValue(Args)).split(';');
1534 
1535     if (Split.second.empty()) {
1536       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1537       continue;
1538     }
1539 
1540     Opts.addRemappedFile(Split.first, Split.second);
1541   }
1542 }
1543 
1544 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1545                                         ArgList &Args) {
1546   using namespace cc1options;
1547   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1548   Opts.ShowComments = Args.hasArg(OPT_C);
1549   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1550   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1551   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1552   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1553 }
1554 
1555 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1556   using namespace cc1options;
1557   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1558   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1559   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1560   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1561   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1562   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1563 
1564   // Use the host triple if unspecified.
1565   if (Opts.Triple.empty())
1566     Opts.Triple = llvm::sys::getHostTriple();
1567 }
1568 
1569 //
1570 
1571 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1572                                         const char *const *ArgBegin,
1573                                         const char *const *ArgEnd,
1574                                         Diagnostic &Diags) {
1575   // Parse the arguments.
1576   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1577   unsigned MissingArgIndex, MissingArgCount;
1578   llvm::OwningPtr<InputArgList> Args(
1579     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1580 
1581   // Check for missing argument error.
1582   if (MissingArgCount)
1583     Diags.Report(diag::err_drv_missing_argument)
1584       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1585 
1586   // Issue errors on unknown arguments.
1587   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1588          ie = Args->filtered_end(); it != ie; ++it)
1589     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1590 
1591   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1592   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1593   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1594   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1595   // FIXME: We shouldn't have to pass the DashX option around here
1596   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1597   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags);
1598   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1599   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1600     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1601   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1602   // PCH file and find the original header name. Remove the need to do that in
1603   // ParsePreprocessorArgs and remove the FileManager
1604   // parameters from the function and the "FileManager.h" #include.
1605   FileManager FileMgr(Res.getFileSystemOpts());
1606   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1607   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1608   ParseTargetArgs(Res.getTargetOpts(), *Args);
1609 }
1610