xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 1d56c9eed77fe703f389bfa82f79b155a30168d4) 
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   if (Opts.BufferOverflows)
122     Res.push_back("-analyzer-check-buffer-overflows");
123 }
124 
125 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
126                               std::vector<std::string> &Res) {
127   if (Opts.DebugInfo)
128     Res.push_back("-g");
129   if (Opts.DisableLLVMOpts)
130     Res.push_back("-disable-llvm-optzns");
131   if (Opts.DisableRedZone)
132     Res.push_back("-disable-red-zone");
133   if (!Opts.DwarfDebugFlags.empty()) {
134     Res.push_back("-dwarf-debug-flags");
135     Res.push_back(Opts.DwarfDebugFlags);
136   }
137   if (!Opts.MergeAllConstants)
138     Res.push_back("-fno-merge-all-constants");
139   if (Opts.NoCommon)
140     Res.push_back("-fno-common");
141   if (Opts.NoImplicitFloat)
142     Res.push_back("-no-implicit-float");
143   if (Opts.OmitLeafFramePointer)
144     Res.push_back("-momit-leaf-frame-pointer");
145   if (Opts.OptimizeSize) {
146     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
147     Res.push_back("-Os");
148   } else if (Opts.OptimizationLevel != 0)
149     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
150   if (!Opts.MainFileName.empty()) {
151     Res.push_back("-main-file-name");
152     Res.push_back(Opts.MainFileName);
153   }
154   // SimplifyLibCalls is only derived.
155   // TimePasses is only derived.
156   // UnitAtATime is unused.
157   // Inlining is only derived.
158 
159   // UnrollLoops is derived, but also accepts an option, no
160   // harm in pushing it back here.
161   if (Opts.UnrollLoops)
162     Res.push_back("-funroll-loops");
163   if (Opts.DataSections)
164     Res.push_back("-fdata-sections");
165   if (Opts.FunctionSections)
166     Res.push_back("-ffunction-sections");
167   if (Opts.AsmVerbose)
168     Res.push_back("-masm-verbose");
169   if (!Opts.CodeModel.empty()) {
170     Res.push_back("-mcode-model");
171     Res.push_back(Opts.CodeModel);
172   }
173   if (!Opts.CXAAtExit)
174     Res.push_back("-fno-use-cxa-atexit");
175   if (Opts.CXXCtorDtorAliases)
176     Res.push_back("-mconstructor-aliases");
177   if (!Opts.DebugPass.empty()) {
178     Res.push_back("-mdebug-pass");
179     Res.push_back(Opts.DebugPass);
180   }
181   if (Opts.DisableFPElim)
182     Res.push_back("-mdisable-fp-elim");
183   if (!Opts.FloatABI.empty()) {
184     Res.push_back("-mfloat-abi");
185     Res.push_back(Opts.FloatABI);
186   }
187   if (!Opts.LimitFloatPrecision.empty()) {
188     Res.push_back("-mlimit-float-precision");
189     Res.push_back(Opts.LimitFloatPrecision);
190   }
191   if (Opts.NoZeroInitializedInBSS)
192     Res.push_back("-mno-zero-initialized-bss");
193   switch (Opts.getObjCDispatchMethod()) {
194   case CodeGenOptions::Legacy:
195     break;
196   case CodeGenOptions::Mixed:
197     Res.push_back("-fobjc-dispatch-method=mixed");
198     break;
199   case CodeGenOptions::NonLegacy:
200     Res.push_back("-fobjc-dispatch-method=non-legacy");
201     break;
202   }
203   if (Opts.RelaxAll)
204     Res.push_back("-mrelax-all");
205   if (Opts.SoftFloat)
206     Res.push_back("-msoft-float");
207   if (Opts.UnwindTables)
208     Res.push_back("-munwind-tables");
209   if (Opts.RelocationModel != "pic") {
210     Res.push_back("-mrelocation-model");
211     Res.push_back(Opts.RelocationModel);
212   }
213   if (!Opts.VerifyModule)
214     Res.push_back("-disable-llvm-verifier");
215 }
216 
217 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
218                                        std::vector<std::string> &Res) {
219   if (Opts.IncludeSystemHeaders)
220     Res.push_back("-sys-header-deps");
221   if (Opts.UsePhonyTargets)
222     Res.push_back("-MP");
223   if (!Opts.OutputFile.empty()) {
224     Res.push_back("-dependency-file");
225     Res.push_back(Opts.OutputFile);
226   }
227   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
228     Res.push_back("-MT");
229     Res.push_back(Opts.Targets[i]);
230   }
231 }
232 
233 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
234                                  std::vector<std::string> &Res) {
235   if (Opts.IgnoreWarnings)
236     Res.push_back("-w");
237   if (Opts.NoRewriteMacros)
238     Res.push_back("-Wno-rewrite-macros");
239   if (Opts.Pedantic)
240     Res.push_back("-pedantic");
241   if (Opts.PedanticErrors)
242     Res.push_back("-pedantic-errors");
243   if (!Opts.ShowColumn)
244     Res.push_back("-fno-show-column");
245   if (!Opts.ShowLocation)
246     Res.push_back("-fno-show-source-location");
247   if (!Opts.ShowCarets)
248     Res.push_back("-fno-caret-diagnostics");
249   if (!Opts.ShowFixits)
250     Res.push_back("-fno-diagnostics-fixit-info");
251   if (Opts.ShowSourceRanges)
252     Res.push_back("-fdiagnostics-print-source-range-info");
253   if (Opts.ShowParseableFixits)
254     Res.push_back("-fdiagnostics-parseable-fixits");
255   if (Opts.ShowColors)
256     Res.push_back("-fcolor-diagnostics");
257   if (Opts.VerifyDiagnostics)
258     Res.push_back("-verify");
259   if (Opts.ShowOptionNames)
260     Res.push_back("-fdiagnostics-show-option");
261   if (Opts.ShowCategories == 1)
262     Res.push_back("-fdiagnostics-show-category=id");
263   else if (Opts.ShowCategories == 2)
264     Res.push_back("-fdiagnostics-show-category=name");
265   if (Opts.ErrorLimit) {
266     Res.push_back("-ferror-limit");
267     Res.push_back(llvm::utostr(Opts.ErrorLimit));
268   }
269   if (Opts.MacroBacktraceLimit
270                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
271     Res.push_back("-fmacro-backtrace-limit");
272     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
273   }
274   if (Opts.TemplateBacktraceLimit
275                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
276     Res.push_back("-ftemplate-backtrace-limit");
277     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
278   }
279 
280   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
281     Res.push_back("-ftabstop");
282     Res.push_back(llvm::utostr(Opts.TabStop));
283   }
284   if (Opts.MessageLength) {
285     Res.push_back("-fmessage-length");
286     Res.push_back(llvm::utostr(Opts.MessageLength));
287   }
288   if (!Opts.DumpBuildInformation.empty()) {
289     Res.push_back("-dump-build-information");
290     Res.push_back(Opts.DumpBuildInformation);
291   }
292   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
293     Res.push_back("-W" + Opts.Warnings[i]);
294 }
295 
296 static const char *getInputKindName(InputKind Kind) {
297   switch (Kind) {
298   case IK_None:              break;
299   case IK_AST:               return "ast";
300   case IK_Asm:               return "assembler-with-cpp";
301   case IK_C:                 return "c";
302   case IK_CXX:               return "c++";
303   case IK_LLVM_IR:           return "ir";
304   case IK_ObjC:              return "objective-c";
305   case IK_ObjCXX:            return "objective-c++";
306   case IK_OpenCL:            return "cl";
307   case IK_CUDA:              return "cuda";
308   case IK_PreprocessedC:     return "cpp-output";
309   case IK_PreprocessedCXX:   return "c++-cpp-output";
310   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
311   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
312   }
313 
314   llvm_unreachable("Unexpected language kind!");
315   return 0;
316 }
317 
318 static const char *getActionName(frontend::ActionKind Kind) {
319   switch (Kind) {
320   case frontend::PluginAction:
321   case frontend::InheritanceView:
322     llvm_unreachable("Invalid kind!");
323 
324   case frontend::ASTDump:                return "-ast-dump";
325   case frontend::ASTDumpXML:             return "-ast-dump-xml";
326   case frontend::ASTPrint:               return "-ast-print";
327   case frontend::ASTPrintXML:            return "-ast-print-xml";
328   case frontend::ASTView:                return "-ast-view";
329   case frontend::BoostCon:               return "-boostcon";
330   case frontend::CreateModule:           return "-create-module";
331   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
332   case frontend::DumpTokens:             return "-dump-tokens";
333   case frontend::EmitAssembly:           return "-S";
334   case frontend::EmitBC:                 return "-emit-llvm-bc";
335   case frontend::EmitHTML:               return "-emit-html";
336   case frontend::EmitLLVM:               return "-emit-llvm";
337   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
338   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
339   case frontend::EmitObj:                return "-emit-obj";
340   case frontend::FixIt:                  return "-fixit";
341   case frontend::GeneratePCH:            return "-emit-pch";
342   case frontend::GeneratePTH:            return "-emit-pth";
343   case frontend::InitOnly:               return "-init-only";
344   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
345   case frontend::PrintDeclContext:       return "-print-decl-contexts";
346   case frontend::PrintPreamble:          return "-print-preamble";
347   case frontend::PrintPreprocessedInput: return "-E";
348   case frontend::RewriteMacros:          return "-rewrite-macros";
349   case frontend::RewriteObjC:            return "-rewrite-objc";
350   case frontend::RewriteTest:            return "-rewrite-test";
351   case frontend::RunAnalysis:            return "-analyze";
352   case frontend::RunPreprocessorOnly:    return "-Eonly";
353   }
354 
355   llvm_unreachable("Unexpected language kind!");
356   return 0;
357 }
358 
359 static void FileSystemOptsToArgs(const FileSystemOptions &Opts,
360                                  std::vector<std::string> &Res) {
361   if (!Opts.WorkingDir.empty()) {
362     Res.push_back("-working-directory");
363     Res.push_back(Opts.WorkingDir);
364   }
365 }
366 
367 static void FrontendOptsToArgs(const FrontendOptions &Opts,
368                                std::vector<std::string> &Res) {
369   if (Opts.DisableFree)
370     Res.push_back("-disable-free");
371   if (Opts.RelocatablePCH)
372     Res.push_back("-relocatable-pch");
373   if (Opts.ChainedPCH)
374     Res.push_back("-chained-pch");
375   if (Opts.ShowHelp)
376     Res.push_back("-help");
377   if (Opts.ShowMacrosInCodeCompletion)
378     Res.push_back("-code-completion-macros");
379   if (Opts.ShowCodePatternsInCodeCompletion)
380     Res.push_back("-code-completion-patterns");
381   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
382     Res.push_back("-no-code-completion-globals");
383   if (Opts.ShowStats)
384     Res.push_back("-print-stats");
385   if (Opts.ShowTimers)
386     Res.push_back("-ftime-report");
387   if (Opts.ShowVersion)
388     Res.push_back("-version");
389   if (Opts.FixWhatYouCan)
390     Res.push_back("-fix-what-you-can");
391 
392   bool NeedLang = false;
393   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
394     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
395         Opts.Inputs[i].first)
396       NeedLang = true;
397   if (NeedLang) {
398     Res.push_back("-x");
399     Res.push_back(getInputKindName(Opts.Inputs[0].first));
400   }
401   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
402     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
403            "Unable to represent this input vector!");
404     Res.push_back(Opts.Inputs[i].second);
405   }
406 
407   if (!Opts.OutputFile.empty()) {
408     Res.push_back("-o");
409     Res.push_back(Opts.OutputFile);
410   }
411   if (!Opts.ViewClassInheritance.empty()) {
412     Res.push_back("-cxx-inheritance-view");
413     Res.push_back(Opts.ViewClassInheritance);
414   }
415   if (!Opts.CodeCompletionAt.FileName.empty()) {
416     Res.push_back("-code-completion-at");
417     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
418                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
419                   llvm::utostr(Opts.CodeCompletionAt.Column));
420   }
421   if (Opts.ProgramAction != frontend::InheritanceView &&
422       Opts.ProgramAction != frontend::PluginAction)
423     Res.push_back(getActionName(Opts.ProgramAction));
424   if (!Opts.ActionName.empty()) {
425     Res.push_back("-plugin");
426     Res.push_back(Opts.ActionName);
427     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
428       Res.push_back("-plugin-arg-" + Opts.ActionName);
429       Res.push_back(Opts.PluginArgs[i]);
430     }
431   }
432   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
433     Res.push_back("-load");
434     Res.push_back(Opts.Plugins[i]);
435   }
436   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
437     Res.push_back("-ast-merge");
438     Res.push_back(Opts.ASTMergeFiles[i]);
439   }
440   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
441     Res.push_back("-import-module");
442     Res.push_back(Opts.Modules[i]);
443   }
444   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
445     Res.push_back("-mllvm");
446     Res.push_back(Opts.LLVMArgs[i]);
447   }
448 }
449 
450 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
451                                    std::vector<std::string> &Res) {
452   if (Opts.Sysroot != "/") {
453     Res.push_back("-isysroot");
454     Res.push_back(Opts.Sysroot);
455   }
456 
457   for (unsigned i = 0, e = Opts.CXXSystemIncludes.size(); i != e; ++i) {
458     Res.push_back("-cxx-system-include");
459     Res.push_back(Opts.CXXSystemIncludes[i]);
460   }
461 
462   /// User specified include entries.
463   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
464     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
465     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
466       llvm::report_fatal_error("Invalid option set!");
467     if (E.IsUserSupplied) {
468       if (E.Group == frontend::After) {
469         Res.push_back("-idirafter");
470       } else if (E.Group == frontend::Quoted) {
471         Res.push_back("-iquote");
472       } else if (E.Group == frontend::System) {
473         Res.push_back("-isystem");
474       } else {
475         assert(E.Group == frontend::Angled && "Invalid group!");
476         Res.push_back(E.IsFramework ? "-F" : "-I");
477       }
478     } else {
479       if (E.Group != frontend::Angled && E.Group != frontend::System)
480         llvm::report_fatal_error("Invalid option set!");
481       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
482                     "-iwithprefix");
483     }
484     Res.push_back(E.Path);
485   }
486 
487   if (!Opts.EnvIncPath.empty()) {
488     // FIXME: Provide an option for this, and move env detection to driver.
489     llvm::report_fatal_error("Not yet implemented!");
490   }
491   if (!Opts.CEnvIncPath.empty()) {
492     // FIXME: Provide an option for this, and move env detection to driver.
493     llvm::report_fatal_error("Not yet implemented!");
494   }
495   if (!Opts.ObjCEnvIncPath.empty()) {
496     // FIXME: Provide an option for this, and move env detection to driver.
497     llvm::report_fatal_error("Not yet implemented!");
498   }
499   if (!Opts.CXXEnvIncPath.empty()) {
500     // FIXME: Provide an option for this, and move env detection to driver.
501     llvm::report_fatal_error("Not yet implemented!");
502   }
503   if (!Opts.ObjCXXEnvIncPath.empty()) {
504     // FIXME: Provide an option for this, and move env detection to driver.
505     llvm::report_fatal_error("Not yet implemented!");
506   }
507   if (!Opts.ResourceDir.empty()) {
508     Res.push_back("-resource-dir");
509     Res.push_back(Opts.ResourceDir);
510   }
511   if (!Opts.UseStandardIncludes)
512     Res.push_back("-nostdinc");
513   if (!Opts.UseStandardCXXIncludes)
514     Res.push_back("-nostdinc++");
515   if (Opts.Verbose)
516     Res.push_back("-v");
517 }
518 
519 static void LangOptsToArgs(const LangOptions &Opts,
520                            std::vector<std::string> &Res) {
521   LangOptions DefaultLangOpts;
522 
523   // FIXME: Need to set -std to get all the implicit options.
524 
525   // FIXME: We want to only pass options relative to the defaults, which
526   // requires constructing a target. :(
527   //
528   // It would be better to push the all target specific choices into the driver,
529   // so that everything below that was more uniform.
530 
531   if (Opts.Trigraphs)
532     Res.push_back("-trigraphs");
533   // Implicit based on the input kind:
534   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
535   // Implicit based on the input language standard:
536   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
537   if (Opts.DollarIdents)
538     Res.push_back("-fdollars-in-identifiers");
539   if (Opts.GNUMode && !Opts.GNUKeywords)
540     Res.push_back("-fno-gnu-keywords");
541   if (!Opts.GNUMode && Opts.GNUKeywords)
542     Res.push_back("-fgnu-keywords");
543   if (Opts.Microsoft)
544     Res.push_back("-fms-extensions");
545   if (Opts.MSCVersion != 0)
546     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
547   if (Opts.Borland)
548     Res.push_back("-fborland-extensions");
549   if (Opts.ObjCNonFragileABI)
550     Res.push_back("-fobjc-nonfragile-abi");
551   if (Opts.ObjCNonFragileABI2)
552     Res.push_back("-fobjc-nonfragile-abi2");
553   if (Opts.ObjCDefaultSynthProperties)
554     Res.push_back("-fobjc-default-synthesize-properties");
555   // NoInline is implicit.
556   if (!Opts.CXXOperatorNames)
557     Res.push_back("-fno-operator-names");
558   if (Opts.PascalStrings)
559     Res.push_back("-fpascal-strings");
560   if (Opts.CatchUndefined)
561     Res.push_back("-fcatch-undefined-behavior");
562   if (Opts.WritableStrings)
563     Res.push_back("-fwritable-strings");
564   if (Opts.ConstStrings)
565     Res.push_back("-Wwrite-strings");
566   if (!Opts.LaxVectorConversions)
567     Res.push_back("-fno-lax-vector-conversions");
568   if (Opts.AltiVec)
569     Res.push_back("-faltivec");
570   if (Opts.Exceptions)
571     Res.push_back("-fexceptions");
572   if (Opts.SjLjExceptions)
573     Res.push_back("-fsjlj-exceptions");
574   if (!Opts.RTTI)
575     Res.push_back("-fno-rtti");
576   if (!Opts.NeXTRuntime)
577     Res.push_back("-fgnu-runtime");
578   if (Opts.Freestanding)
579     Res.push_back("-ffreestanding");
580   if (Opts.NoBuiltin)
581     Res.push_back("-fno-builtin");
582   if (!Opts.AssumeSaneOperatorNew)
583     Res.push_back("-fno-assume-sane-operator-new");
584   if (!Opts.ThreadsafeStatics)
585     Res.push_back("-fno-threadsafe-statics");
586   if (Opts.POSIXThreads)
587     Res.push_back("-pthread");
588   if (Opts.Blocks)
589     Res.push_back("-fblocks");
590   if (Opts.EmitAllDecls)
591     Res.push_back("-femit-all-decls");
592   if (Opts.MathErrno)
593     Res.push_back("-fmath-errno");
594   switch (Opts.getSignedOverflowBehavior()) {
595   case LangOptions::SOB_Undefined: break;
596   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
597   case LangOptions::SOB_Trapping:
598     Res.push_back("-ftrapv"); break;
599     if (!Opts.OverflowHandler.empty()) {
600       Res.push_back("-ftrapv-handler");
601       Res.push_back(Opts.OverflowHandler);
602     }
603   }
604   if (Opts.HeinousExtensions)
605     Res.push_back("-fheinous-gnu-extensions");
606   // Optimize is implicit.
607   // OptimizeSize is implicit.
608   if (Opts.Static)
609     Res.push_back("-static-define");
610   if (Opts.DumpRecordLayouts)
611     Res.push_back("-fdump-record-layouts");
612   if (Opts.DumpVTableLayouts)
613     Res.push_back("-fdump-vtable-layouts");
614   if (Opts.NoBitFieldTypeAlign)
615     Res.push_back("-fno-bitfield-type-alignment");
616   if (Opts.SjLjExceptions)
617     Res.push_back("-fsjlj-exceptions");
618   if (Opts.PICLevel) {
619     Res.push_back("-pic-level");
620     Res.push_back(llvm::utostr(Opts.PICLevel));
621   }
622   if (Opts.ObjCGCBitmapPrint)
623     Res.push_back("-print-ivar-layout");
624   if (Opts.NoConstantCFStrings)
625     Res.push_back("-fno-constant-cfstrings");
626   if (!Opts.AccessControl)
627     Res.push_back("-fno-access-control");
628   if (!Opts.CharIsSigned)
629     Res.push_back("-fno-signed-char");
630   if (Opts.ShortWChar)
631     Res.push_back("-fshort-wchar");
632   if (!Opts.ElideConstructors)
633     Res.push_back("-fno-elide-constructors");
634   if (Opts.getGCMode() != LangOptions::NonGC) {
635     if (Opts.getGCMode() == LangOptions::HybridGC) {
636       Res.push_back("-fobjc-gc");
637     } else {
638       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
639       Res.push_back("-fobjc-gc-only");
640     }
641   }
642   if (Opts.getVisibilityMode() != DefaultVisibility) {
643     Res.push_back("-fvisibility");
644     if (Opts.getVisibilityMode() == HiddenVisibility) {
645       Res.push_back("hidden");
646     } else {
647       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
648              "Invalid visibility!");
649       Res.push_back("protected");
650     }
651   }
652   if (Opts.InlineVisibilityHidden)
653     Res.push_back("-fvisibility-inlines-hidden");
654 
655   if (Opts.getStackProtectorMode() != 0) {
656     Res.push_back("-stack-protector");
657     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
658   }
659   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
660     Res.push_back("-ftemplate-depth");
661     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
662   }
663   if (!Opts.ObjCConstantStringClass.empty()) {
664     Res.push_back("-fconstant-string-class");
665     Res.push_back(Opts.ObjCConstantStringClass);
666   }
667 }
668 
669 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
670                                    std::vector<std::string> &Res) {
671   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
672     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
673                   Opts.Macros[i].first);
674   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
675     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
676     Res.push_back("-include");
677     Res.push_back(Opts.Includes[i]);
678   }
679   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
680     Res.push_back("-imacros");
681     Res.push_back(Opts.MacroIncludes[i]);
682   }
683   if (!Opts.UsePredefines)
684     Res.push_back("-undef");
685   if (Opts.DetailedRecord)
686     Res.push_back("-detailed-preprocessing-record");
687   if (!Opts.ImplicitPCHInclude.empty()) {
688     Res.push_back("-include-pch");
689     Res.push_back(Opts.ImplicitPCHInclude);
690   }
691   if (!Opts.ImplicitPTHInclude.empty()) {
692     Res.push_back("-include-pth");
693     Res.push_back(Opts.ImplicitPTHInclude);
694   }
695   if (!Opts.TokenCache.empty()) {
696     if (Opts.ImplicitPTHInclude.empty()) {
697       Res.push_back("-token-cache");
698       Res.push_back(Opts.TokenCache);
699     } else
700       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
701              "Unsupported option combination!");
702   }
703   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
704     Res.push_back("-remap-file");
705     Res.push_back(Opts.RemappedFiles[i].first + ";" +
706                   Opts.RemappedFiles[i].second);
707   }
708 }
709 
710 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
711                                          std::vector<std::string> &Res) {
712   if (!Opts.ShowCPP && !Opts.ShowMacros)
713     llvm::report_fatal_error("Invalid option combination!");
714 
715   if (Opts.ShowCPP && Opts.ShowMacros)
716     Res.push_back("-dD");
717   else if (!Opts.ShowCPP && Opts.ShowMacros)
718     Res.push_back("-dM");
719 
720   if (Opts.ShowHeaderIncludes)
721     Res.push_back("-H");
722   if (!Opts.ShowLineMarkers)
723     Res.push_back("-P");
724   if (Opts.ShowComments)
725     Res.push_back("-C");
726   if (Opts.ShowMacroComments)
727     Res.push_back("-CC");
728 }
729 
730 static void TargetOptsToArgs(const TargetOptions &Opts,
731                              std::vector<std::string> &Res) {
732   Res.push_back("-triple");
733   Res.push_back(Opts.Triple);
734   if (!Opts.CPU.empty()) {
735     Res.push_back("-target-cpu");
736     Res.push_back(Opts.CPU);
737   }
738   if (!Opts.ABI.empty()) {
739     Res.push_back("-target-abi");
740     Res.push_back(Opts.ABI);
741   }
742   if (!Opts.LinkerVersion.empty()) {
743     Res.push_back("-target-linker-version");
744     Res.push_back(Opts.LinkerVersion);
745   }
746   if (!Opts.CXXABI.empty()) {
747     Res.push_back("-cxx-abi");
748     Res.push_back(Opts.CXXABI);
749   }
750   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
751     Res.push_back("-target-feature");
752     Res.push_back(Opts.Features[i]);
753   }
754 }
755 
756 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
757   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
758   CodeGenOptsToArgs(getCodeGenOpts(), Res);
759   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
760   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
761   FileSystemOptsToArgs(getFileSystemOpts(), Res);
762   FrontendOptsToArgs(getFrontendOpts(), Res);
763   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
764   LangOptsToArgs(getLangOpts(), Res);
765   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
766   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
767   TargetOptsToArgs(getTargetOpts(), Res);
768 }
769 
770 //===----------------------------------------------------------------------===//
771 // Deserialization (to args)
772 //===----------------------------------------------------------------------===//
773 
774 using namespace clang::driver;
775 using namespace clang::driver::cc1options;
776 
777 //
778 
779 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
780                                      Diagnostic &Diags) {
781   unsigned DefaultOpt = 0;
782   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
783     DefaultOpt = 2;
784   // -Os implies -O2
785   return Args.hasArg(OPT_Os) ? 2 :
786     Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
787 }
788 
789 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
790                               Diagnostic &Diags) {
791   using namespace cc1options;
792 
793   Opts.AnalysisList.clear();
794 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
795   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
796 #include "clang/Frontend/Analyses.def"
797 
798   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
799     llvm::StringRef Name = A->getValue(Args);
800     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
801 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
802       .Case(CMDFLAG, NAME##Model)
803 #include "clang/Frontend/Analyses.def"
804       .Default(NumStores);
805     // FIXME: Error handling.
806     if (Value == NumStores)
807       Diags.Report(diag::err_drv_invalid_value)
808         << A->getAsString(Args) << Name;
809     else
810       Opts.AnalysisStoreOpt = Value;
811   }
812 
813   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
814     llvm::StringRef Name = A->getValue(Args);
815     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
816 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
817       .Case(CMDFLAG, NAME##Model)
818 #include "clang/Frontend/Analyses.def"
819       .Default(NumConstraints);
820     // FIXME: Error handling.
821     if (Value == NumConstraints)
822       Diags.Report(diag::err_drv_invalid_value)
823         << A->getAsString(Args) << Name;
824     else
825       Opts.AnalysisConstraintsOpt = Value;
826   }
827 
828   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
829     llvm::StringRef Name = A->getValue(Args);
830     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
831 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
832       .Case(CMDFLAG, PD_##NAME)
833 #include "clang/Frontend/Analyses.def"
834       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
835     // FIXME: Error handling.
836     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
837       Diags.Report(diag::err_drv_invalid_value)
838         << A->getAsString(Args) << Name;
839     else
840       Opts.AnalysisDiagOpt = Value;
841   }
842 
843   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
844   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
845   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
846   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
847   Opts.AnalyzeNestedBlocks =
848     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
849   Opts.AnalyzerStats = Args.hasArg(OPT_analysis_AnalyzerStats);
850   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
851   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
852   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
853   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
854   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
855   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
856   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
857   Opts.EnableExperimentalInternalChecks =
858     Args.hasArg(OPT_analyzer_experimental_internal_checks);
859   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
860   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
861   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
862   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
863   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
864   Opts.BufferOverflows = Args.hasArg(OPT_analysis_WarnBufferOverflows);
865 }
866 
867 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
868                              Diagnostic &Diags) {
869   using namespace cc1options;
870 
871   Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
872   if (Opts.OptimizationLevel > 3) {
873     Diags.Report(diag::err_drv_invalid_value)
874       << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
875     Opts.OptimizationLevel = 3;
876   }
877 
878   // We must always run at least the always inlining pass.
879   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
880     : CodeGenOptions::OnlyAlwaysInlining;
881 
882   Opts.DebugInfo = Args.hasArg(OPT_g);
883   Opts.LimitDebugInfo = Args.hasArg(OPT_flimit_debug_info);
884   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
885   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
886   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
887   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
888   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
889   Opts.NoCommon = Args.hasArg(OPT_fno_common);
890   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
891   Opts.OptimizeSize = Args.hasArg(OPT_Os);
892   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
893                             Args.hasArg(OPT_ffreestanding));
894   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
895                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
896 
897   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
898   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
899   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
900   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
901   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
902   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
903   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
904   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
905   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
906   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
907   Opts.NoInfsFPMath = Opts.NoNaNsFPMath = Args.hasArg(OPT_cl_finite_math_only)||
908                                           Args.hasArg(OPT_cl_fast_relaxed_math);
909   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
910   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
911   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
912   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
913   Opts.UnsafeFPMath = Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
914                       Args.hasArg(OPT_cl_fast_relaxed_math);
915   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
916   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
917 
918   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
919   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
920 
921   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
922   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
923 
924   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
925 
926   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
927     llvm::StringRef Name = A->getValue(Args);
928     unsigned Method = llvm::StringSwitch<unsigned>(Name)
929       .Case("legacy", CodeGenOptions::Legacy)
930       .Case("non-legacy", CodeGenOptions::NonLegacy)
931       .Case("mixed", CodeGenOptions::Mixed)
932       .Default(~0U);
933     if (Method == ~0U)
934       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
935     else
936       Opts.ObjCDispatchMethod = Method;
937   }
938 }
939 
940 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
941                                       ArgList &Args) {
942   using namespace cc1options;
943   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
944   Opts.Targets = Args.getAllArgValues(OPT_MT);
945   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
946   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
947 }
948 
949 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
950                                 Diagnostic &Diags) {
951   using namespace cc1options;
952   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
953   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
954   Opts.Pedantic = Args.hasArg(OPT_pedantic);
955   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
956   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
957   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
958   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
959   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
960   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
961   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
962 
963   llvm::StringRef ShowOverloads =
964     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
965   if (ShowOverloads == "best")
966     Opts.ShowOverloads = Diagnostic::Ovl_Best;
967   else if (ShowOverloads == "all")
968     Opts.ShowOverloads = Diagnostic::Ovl_All;
969   else
970     Diags.Report(diag::err_drv_invalid_value)
971       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
972       << ShowOverloads;
973 
974   llvm::StringRef ShowCategory =
975     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
976   if (ShowCategory == "none")
977     Opts.ShowCategories = 0;
978   else if (ShowCategory == "id")
979     Opts.ShowCategories = 1;
980   else if (ShowCategory == "name")
981     Opts.ShowCategories = 2;
982   else
983     Diags.Report(diag::err_drv_invalid_value)
984       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
985       << ShowCategory;
986 
987   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
988   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
989   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
990   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
991   Opts.MacroBacktraceLimit
992     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
993                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
994   Opts.TemplateBacktraceLimit
995     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
996                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
997                          Diags);
998   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
999                                     DiagnosticOptions::DefaultTabStop, Diags);
1000   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1001     Diags.Report(diag::warn_ignoring_ftabstop_value)
1002       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1003     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1004   }
1005   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1006   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1007   Opts.Warnings = Args.getAllArgValues(OPT_W);
1008 }
1009 
1010 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1011   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1012 }
1013 
1014 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1015                                    Diagnostic &Diags) {
1016   using namespace cc1options;
1017   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1018   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1019     switch (A->getOption().getID()) {
1020     default:
1021       assert(0 && "Invalid option in group!");
1022     case OPT_ast_dump:
1023       Opts.ProgramAction = frontend::ASTDump; break;
1024     case OPT_ast_dump_xml:
1025       Opts.ProgramAction = frontend::ASTDumpXML; break;
1026     case OPT_ast_print:
1027       Opts.ProgramAction = frontend::ASTPrint; break;
1028     case OPT_ast_print_xml:
1029       Opts.ProgramAction = frontend::ASTPrintXML; break;
1030     case OPT_ast_view:
1031       Opts.ProgramAction = frontend::ASTView; break;
1032     case OPT_boostcon:
1033       Opts.ProgramAction = frontend::BoostCon; break;
1034     case OPT_dump_raw_tokens:
1035       Opts.ProgramAction = frontend::DumpRawTokens; break;
1036     case OPT_dump_tokens:
1037       Opts.ProgramAction = frontend::DumpTokens; break;
1038     case OPT_S:
1039       Opts.ProgramAction = frontend::EmitAssembly; break;
1040     case OPT_emit_llvm_bc:
1041       Opts.ProgramAction = frontend::EmitBC; break;
1042     case OPT_emit_html:
1043       Opts.ProgramAction = frontend::EmitHTML; break;
1044     case OPT_emit_llvm:
1045       Opts.ProgramAction = frontend::EmitLLVM; break;
1046     case OPT_emit_llvm_only:
1047       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1048     case OPT_emit_codegen_only:
1049       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1050     case OPT_emit_obj:
1051       Opts.ProgramAction = frontend::EmitObj; break;
1052     case OPT_fixit_EQ:
1053       Opts.FixItSuffix = A->getValue(Args);
1054       // fall-through!
1055     case OPT_fixit:
1056       Opts.ProgramAction = frontend::FixIt; break;
1057     case OPT_emit_pch:
1058       Opts.ProgramAction = frontend::GeneratePCH; break;
1059     case OPT_emit_pth:
1060       Opts.ProgramAction = frontend::GeneratePTH; break;
1061     case OPT_init_only:
1062       Opts.ProgramAction = frontend::InitOnly; break;
1063     case OPT_fsyntax_only:
1064       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1065     case OPT_print_decl_contexts:
1066       Opts.ProgramAction = frontend::PrintDeclContext; break;
1067     case OPT_print_preamble:
1068       Opts.ProgramAction = frontend::PrintPreamble; break;
1069     case OPT_E:
1070       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1071     case OPT_rewrite_macros:
1072       Opts.ProgramAction = frontend::RewriteMacros; break;
1073     case OPT_rewrite_objc:
1074       Opts.ProgramAction = frontend::RewriteObjC; break;
1075     case OPT_rewrite_test:
1076       Opts.ProgramAction = frontend::RewriteTest; break;
1077     case OPT_analyze:
1078       Opts.ProgramAction = frontend::RunAnalysis; break;
1079     case OPT_Eonly:
1080       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1081     case OPT_create_module:
1082       Opts.ProgramAction = frontend::CreateModule; break;
1083     }
1084   }
1085 
1086   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1087     Opts.Plugins.push_back(A->getValue(Args,0));
1088     Opts.ProgramAction = frontend::PluginAction;
1089     Opts.ActionName = A->getValue(Args);
1090 
1091     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1092            end = Args.filtered_end(); it != end; ++it) {
1093       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1094         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1095     }
1096   }
1097 
1098   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1099     Opts.CodeCompletionAt =
1100       ParsedSourceLocation::FromString(A->getValue(Args));
1101     if (Opts.CodeCompletionAt.FileName.empty())
1102       Diags.Report(diag::err_drv_invalid_value)
1103         << A->getAsString(Args) << A->getValue(Args);
1104   }
1105   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1106 
1107   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1108   Opts.Plugins = Args.getAllArgValues(OPT_load);
1109   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1110   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1111   Opts.ShowHelp = Args.hasArg(OPT_help);
1112   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1113   Opts.ShowCodePatternsInCodeCompletion
1114     = Args.hasArg(OPT_code_completion_patterns);
1115   Opts.ShowGlobalSymbolsInCodeCompletion
1116     = !Args.hasArg(OPT_no_code_completion_globals);
1117   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1118   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1119   Opts.ShowVersion = Args.hasArg(OPT_version);
1120   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1121   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1122   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1123   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1124   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1125 
1126   InputKind DashX = IK_None;
1127   if (const Arg *A = Args.getLastArg(OPT_x)) {
1128     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1129       .Case("c", IK_C)
1130       .Case("cl", IK_OpenCL)
1131       .Case("c", IK_C)
1132       .Case("cl", IK_OpenCL)
1133       .Case("cuda", IK_CUDA)
1134       .Case("c++", IK_CXX)
1135       .Case("objective-c", IK_ObjC)
1136       .Case("objective-c++", IK_ObjCXX)
1137       .Case("cpp-output", IK_PreprocessedC)
1138       .Case("assembler-with-cpp", IK_Asm)
1139       .Case("c++-cpp-output", IK_PreprocessedCXX)
1140       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1141       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1142       .Case("c-header", IK_C)
1143       .Case("objective-c-header", IK_ObjC)
1144       .Case("c++-header", IK_CXX)
1145       .Case("objective-c++-header", IK_ObjCXX)
1146       .Case("ast", IK_AST)
1147       .Case("ir", IK_LLVM_IR)
1148       .Default(IK_None);
1149     if (DashX == IK_None)
1150       Diags.Report(diag::err_drv_invalid_value)
1151         << A->getAsString(Args) << A->getValue(Args);
1152   }
1153 
1154   // '-' is the default input if none is given.
1155   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1156   Opts.Inputs.clear();
1157   if (Inputs.empty())
1158     Inputs.push_back("-");
1159   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1160     InputKind IK = DashX;
1161     if (IK == IK_None) {
1162       IK = FrontendOptions::getInputKindForExtension(
1163         llvm::StringRef(Inputs[i]).rsplit('.').second);
1164       // FIXME: Remove this hack.
1165       if (i == 0)
1166         DashX = IK;
1167     }
1168     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1169   }
1170 
1171   return DashX;
1172 }
1173 
1174 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1175                                                  void *MainAddr) {
1176   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1177 
1178   if (!P.isEmpty()) {
1179     P.eraseComponent();  // Remove /clang from foo/bin/clang
1180     P.eraseComponent();  // Remove /bin   from foo/bin
1181 
1182     // Get foo/lib/clang/<version>/include
1183     P.appendComponent("lib");
1184     P.appendComponent("clang");
1185     P.appendComponent(CLANG_VERSION_STRING);
1186   }
1187 
1188   return P.str();
1189 }
1190 
1191 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1192   using namespace cc1options;
1193   Opts.CXXSystemIncludes = Args.getAllArgValues(OPT_cxx_system_include);
1194   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1195   Opts.Verbose = Args.hasArg(OPT_v);
1196   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1197   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1198   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1199   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1200 
1201   // Add -I... and -F... options in order.
1202   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1203          ie = Args.filtered_end(); it != ie; ++it)
1204     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1205                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1206 
1207   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1208   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1209   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1210                                              OPT_iwithprefixbefore),
1211          ie = Args.filtered_end(); it != ie; ++it) {
1212     const Arg *A = *it;
1213     if (A->getOption().matches(OPT_iprefix))
1214       Prefix = A->getValue(Args);
1215     else if (A->getOption().matches(OPT_iwithprefix))
1216       Opts.AddPath(Prefix.str() + A->getValue(Args),
1217                    frontend::System, false, false, true);
1218     else
1219       Opts.AddPath(Prefix.str() + A->getValue(Args),
1220                    frontend::Angled, false, false, true);
1221   }
1222 
1223   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1224          ie = Args.filtered_end(); it != ie; ++it)
1225     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1226   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1227          ie = Args.filtered_end(); it != ie; ++it)
1228     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1229   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1230          ie = Args.filtered_end(); it != ie; ++it)
1231     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1232                  (*it)->getOption().matches(OPT_iwithsysroot));
1233 
1234   // FIXME: Need options for the various environment variables!
1235 }
1236 
1237 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1238                                          LangStandard::Kind LangStd) {
1239   // Set some properties which depend soley on the input kind; it would be nice
1240   // to move these to the language standard, and have the driver resolve the
1241   // input kind + language standard.
1242   if (IK == IK_Asm) {
1243     Opts.AsmPreprocessor = 1;
1244   } else if (IK == IK_ObjC ||
1245              IK == IK_ObjCXX ||
1246              IK == IK_PreprocessedObjC ||
1247              IK == IK_PreprocessedObjCXX) {
1248     Opts.ObjC1 = Opts.ObjC2 = 1;
1249   }
1250 
1251   if (LangStd == LangStandard::lang_unspecified) {
1252     // Based on the base language, pick one.
1253     switch (IK) {
1254     case IK_None:
1255     case IK_AST:
1256     case IK_LLVM_IR:
1257       assert(0 && "Invalid input kind!");
1258     case IK_OpenCL:
1259       LangStd = LangStandard::lang_opencl;
1260       break;
1261     case IK_CUDA:
1262       LangStd = LangStandard::lang_cuda;
1263       break;
1264     case IK_Asm:
1265     case IK_C:
1266     case IK_PreprocessedC:
1267     case IK_ObjC:
1268     case IK_PreprocessedObjC:
1269       LangStd = LangStandard::lang_gnu99;
1270       break;
1271     case IK_CXX:
1272     case IK_PreprocessedCXX:
1273     case IK_ObjCXX:
1274     case IK_PreprocessedObjCXX:
1275       LangStd = LangStandard::lang_gnucxx98;
1276       break;
1277     }
1278   }
1279 
1280   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1281   Opts.BCPLComment = Std.hasBCPLComments();
1282   Opts.C99 = Std.isC99();
1283   Opts.CPlusPlus = Std.isCPlusPlus();
1284   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1285   Opts.Digraphs = Std.hasDigraphs();
1286   Opts.GNUMode = Std.isGNUMode();
1287   Opts.GNUInline = !Std.isC99();
1288   Opts.HexFloats = Std.hasHexFloats();
1289   Opts.ImplicitInt = Std.hasImplicitInt();
1290 
1291   // OpenCL has some additional defaults.
1292   if (LangStd == LangStandard::lang_opencl) {
1293     Opts.OpenCL = 1;
1294     Opts.AltiVec = 1;
1295     Opts.CXXOperatorNames = 1;
1296     Opts.LaxVectorConversions = 1;
1297   }
1298 
1299   if (LangStd == LangStandard::lang_cuda)
1300     Opts.CUDA = 1;
1301 
1302   // OpenCL and C++ both have bool, true, false keywords.
1303   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1304 
1305   Opts.GNUKeywords = Opts.GNUMode;
1306   Opts.CXXOperatorNames = Opts.CPlusPlus;
1307 
1308   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1309   // is specified, or -std is set to a conforming mode.
1310   Opts.Trigraphs = !Opts.GNUMode;
1311 
1312   Opts.DollarIdents = !Opts.AsmPreprocessor;
1313 }
1314 
1315 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1316                           Diagnostic &Diags) {
1317   // FIXME: Cleanup per-file based stuff.
1318   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1319   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1320     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1321 #define LANGSTANDARD(id, name, desc, features) \
1322       .Case(name, LangStandard::lang_##id)
1323 #include "clang/Frontend/LangStandards.def"
1324       .Default(LangStandard::lang_unspecified);
1325     if (LangStd == LangStandard::lang_unspecified)
1326       Diags.Report(diag::err_drv_invalid_value)
1327         << A->getAsString(Args) << A->getValue(Args);
1328   }
1329 
1330   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1331     if (strcmp(A->getValue(Args), "CL1.1") != 0) {
1332       Diags.Report(diag::err_drv_invalid_value)
1333         << A->getAsString(Args) << A->getValue(Args);
1334     }
1335   }
1336 
1337   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1338 
1339   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1340   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1341   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1342   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1343   // name, as it doesn't seem a useful distinction.
1344   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1345                                   Opts.GNUKeywords);
1346 
1347   if (Args.hasArg(OPT_fno_operator_names))
1348     Opts.CXXOperatorNames = 0;
1349 
1350   if (Args.hasArg(OPT_fobjc_gc_only))
1351     Opts.setGCMode(LangOptions::GCOnly);
1352   else if (Args.hasArg(OPT_fobjc_gc))
1353     Opts.setGCMode(LangOptions::HybridGC);
1354 
1355   if (Args.hasArg(OPT_print_ivar_layout))
1356     Opts.ObjCGCBitmapPrint = 1;
1357   if (Args.hasArg(OPT_fno_constant_cfstrings))
1358     Opts.NoConstantCFStrings = 1;
1359 
1360   if (Args.hasArg(OPT_faltivec))
1361     Opts.AltiVec = 1;
1362 
1363   if (Args.hasArg(OPT_pthread))
1364     Opts.POSIXThreads = 1;
1365 
1366   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1367   if (Vis == "default")
1368     Opts.setVisibilityMode(DefaultVisibility);
1369   else if (Vis == "hidden")
1370     Opts.setVisibilityMode(HiddenVisibility);
1371   else if (Vis == "protected")
1372     Opts.setVisibilityMode(ProtectedVisibility);
1373   else
1374     Diags.Report(diag::err_drv_invalid_value)
1375       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1376 
1377   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1378     Opts.InlineVisibilityHidden = 1;
1379 
1380   if (Args.hasArg(OPT_ftrapv)) {
1381     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1382     // Set the handler, if one is specified.
1383     Opts.OverflowHandler =
1384         Args.getLastArgValue(OPT_ftrapv_handler);
1385   }
1386   else if (Args.hasArg(OPT_fwrapv))
1387     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1388 
1389   if (Args.hasArg(OPT_trigraphs))
1390     Opts.Trigraphs = 1;
1391 
1392   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1393                                    OPT_fno_dollars_in_identifiers,
1394                                    Opts.DollarIdents);
1395   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1396   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1397   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1398   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1399   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1400   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1401   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1402     Opts.LaxVectorConversions = 0;
1403   if (Args.hasArg(OPT_fno_threadsafe_statics))
1404     Opts.ThreadsafeStatics = 0;
1405   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1406   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1407   Opts.Blocks = Args.hasArg(OPT_fblocks);
1408   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1409   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1410   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1411   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1412   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1413   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1414   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1415   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1416   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1417   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1418   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1419                                                Diags);
1420   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
1421                                                     0, Diags);
1422   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1423   Opts.ObjCConstantStringClass =
1424     Args.getLastArgValue(OPT_fconstant_string_class);
1425   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1426   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1427   if (Opts.ObjCNonFragileABI2)
1428     Opts.ObjCNonFragileABI = true;
1429   Opts.ObjCDefaultSynthProperties =
1430     Args.hasArg(OPT_fobjc_default_synthesize_properties);
1431   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1432   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1433   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1434   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1435   Opts.Static = Args.hasArg(OPT_static_define);
1436   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1437   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1438   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1439   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1440   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1441   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1442   Opts.OptimizeSize = 0;
1443 
1444   // FIXME: Eliminate this dependency.
1445   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
1446   Opts.Optimize = Opt != 0;
1447 
1448   // This is the __NO_INLINE__ define, which just depends on things like the
1449   // optimization level and -fno-inline, not actually whether the backend has
1450   // inlining enabled.
1451   //
1452   // FIXME: This is affected by other options (-fno-inline).
1453   Opts.NoInline = !Opt;
1454 
1455   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1456   switch (SSP) {
1457   default:
1458     Diags.Report(diag::err_drv_invalid_value)
1459       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1460     break;
1461   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1462   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1463   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1464   }
1465 }
1466 
1467 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1468                                   FileManager &FileMgr,
1469                                   Diagnostic &Diags) {
1470   using namespace cc1options;
1471   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1472   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1473   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1474       Opts.TokenCache = A->getValue(Args);
1475   else
1476     Opts.TokenCache = Opts.ImplicitPTHInclude;
1477   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1478   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1479   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1480 
1481   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1482   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1483          ie = Args.filtered_end(); it != ie; ++it) {
1484     const Arg *A = *it;
1485     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
1486   }
1487 
1488   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1489     llvm::StringRef Value(A->getValue(Args));
1490     size_t Comma = Value.find(',');
1491     unsigned Bytes = 0;
1492     unsigned EndOfLine = 0;
1493 
1494     if (Comma == llvm::StringRef::npos ||
1495         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1496         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1497       Diags.Report(diag::err_drv_preamble_format);
1498     else {
1499       Opts.PrecompiledPreambleBytes.first = Bytes;
1500       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1501     }
1502   }
1503 
1504   // Add macros from the command line.
1505   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1506          ie = Args.filtered_end(); it != ie; ++it) {
1507     if ((*it)->getOption().matches(OPT_D))
1508       Opts.addMacroDef((*it)->getValue(Args));
1509     else
1510       Opts.addMacroUndef((*it)->getValue(Args));
1511   }
1512 
1513   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1514 
1515   // Add the ordered list of -includes.
1516   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1517                                              OPT_include_pth),
1518          ie = Args.filtered_end(); it != ie; ++it) {
1519     const Arg *A = *it;
1520     // PCH is handled specially, we need to extra the original include path.
1521     if (A->getOption().matches(OPT_include_pch)) {
1522       std::string OriginalFile =
1523         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
1524       if (OriginalFile.empty())
1525         continue;
1526 
1527       Opts.Includes.push_back(OriginalFile);
1528     } else
1529       Opts.Includes.push_back(A->getValue(Args));
1530   }
1531 
1532   // Include 'altivec.h' if -faltivec option present
1533   if (Args.hasArg(OPT_faltivec))
1534     Opts.Includes.push_back("altivec.h");
1535 
1536   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1537          ie = Args.filtered_end(); it != ie; ++it) {
1538     const Arg *A = *it;
1539     std::pair<llvm::StringRef,llvm::StringRef> Split =
1540       llvm::StringRef(A->getValue(Args)).split(';');
1541 
1542     if (Split.second.empty()) {
1543       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1544       continue;
1545     }
1546 
1547     Opts.addRemappedFile(Split.first, Split.second);
1548   }
1549 }
1550 
1551 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1552                                         ArgList &Args) {
1553   using namespace cc1options;
1554   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1555   Opts.ShowComments = Args.hasArg(OPT_C);
1556   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1557   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1558   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1559   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1560 }
1561 
1562 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1563   using namespace cc1options;
1564   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1565   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1566   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1567   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1568   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1569   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1570 
1571   // Use the host triple if unspecified.
1572   if (Opts.Triple.empty())
1573     Opts.Triple = llvm::sys::getHostTriple();
1574 }
1575 
1576 //
1577 
1578 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1579                                         const char *const *ArgBegin,
1580                                         const char *const *ArgEnd,
1581                                         Diagnostic &Diags) {
1582   // Parse the arguments.
1583   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1584   unsigned MissingArgIndex, MissingArgCount;
1585   llvm::OwningPtr<InputArgList> Args(
1586     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1587 
1588   // Check for missing argument error.
1589   if (MissingArgCount)
1590     Diags.Report(diag::err_drv_missing_argument)
1591       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1592 
1593   // Issue errors on unknown arguments.
1594   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1595          ie = Args->filtered_end(); it != ie; ++it)
1596     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1597 
1598   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1599   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1600   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1601   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1602   // FIXME: We shouldn't have to pass the DashX option around here
1603   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1604   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags);
1605   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1606   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1607     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1608   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1609   // PCH file and find the original header name. Remove the need to do that in
1610   // ParsePreprocessorArgs and remove the FileManager
1611   // parameters from the function and the "FileManager.h" #include.
1612   FileManager FileMgr(Res.getFileSystemOpts());
1613   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1614   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1615   ParseTargetArgs(Res.getTargetOpts(), *Args);
1616 }
1617