xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision b9ab0ed33e0d237bc2b628a30b9fe8cc3c2ea1ed) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Serialization/ASTReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/ADT/Triple.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/System/Host.h"
29 #include "llvm/System/Path.h"
30 using namespace clang;
31 
32 static const char *getAnalysisName(Analyses Kind) {
33   switch (Kind) {
34   default:
35     llvm_unreachable("Unknown analysis kind!");
36 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
37   case NAME: return "-" CMDFLAG;
38 #include "clang/Frontend/Analyses.def"
39   }
40 }
41 
42 static const char *getAnalysisStoreName(AnalysisStores Kind) {
43   switch (Kind) {
44   default:
45     llvm_unreachable("Unknown analysis store!");
46 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
47   case NAME##Model: return CMDFLAG;
48 #include "clang/Frontend/Analyses.def"
49   }
50 }
51 
52 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
53   switch (Kind) {
54   default:
55     llvm_unreachable("Unknown analysis constraints!");
56 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
57   case NAME##Model: return CMDFLAG;
58 #include "clang/Frontend/Analyses.def"
59   }
60 }
61 
62 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
63   switch (Kind) {
64   default:
65     llvm_unreachable("Unknown analysis client!");
66 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
67   case PD_##NAME: return CMDFLAG;
68 #include "clang/Frontend/Analyses.def"
69   }
70 }
71 
72 //===----------------------------------------------------------------------===//
73 // Serialization (to args)
74 //===----------------------------------------------------------------------===//
75 
76 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
77                                std::vector<std::string> &Res) {
78   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
79     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
80   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
81     Res.push_back("-analyzer-store");
82     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
83   }
84   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
85     Res.push_back("-analyzer-constraints");
86     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
87   }
88   if (Opts.AnalysisDiagOpt != PD_HTML) {
89     Res.push_back("-analyzer-output");
90     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
91   }
92   if (!Opts.AnalyzeSpecificFunction.empty()) {
93     Res.push_back("-analyze-function");
94     Res.push_back(Opts.AnalyzeSpecificFunction);
95   }
96   if (Opts.AnalyzeAll)
97     Res.push_back("-analyzer-opt-analyze-headers");
98   if (Opts.AnalyzerDisplayProgress)
99     Res.push_back("-analyzer-display-progress");
100   if (Opts.AnalyzeNestedBlocks)
101     Res.push_back("-analyzer-opt-analyze-nested-blocks");
102   if (Opts.AnalyzerStats)
103     Res.push_back("-analyzer-stats");
104   if (Opts.EagerlyAssume)
105     Res.push_back("-analyzer-eagerly-assume");
106   if (!Opts.PurgeDead)
107     Res.push_back("-analyzer-no-purge-dead");
108   if (Opts.TrimGraph)
109     Res.push_back("-trim-egraph");
110   if (Opts.VisualizeEGDot)
111     Res.push_back("-analyzer-viz-egraph-graphviz");
112   if (Opts.VisualizeEGDot)
113     Res.push_back("-analyzer-viz-egraph-ubigraph");
114   if (Opts.EnableExperimentalChecks)
115     Res.push_back("-analyzer-experimental-checks");
116   if (Opts.EnableExperimentalInternalChecks)
117     Res.push_back("-analyzer-experimental-internal-checks");
118   if (Opts.IdempotentOps)
119       Res.push_back("-analyzer-check-idempotent-operations");
120 }
121 
122 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
123                               std::vector<std::string> &Res) {
124   if (Opts.DebugInfo)
125     Res.push_back("-g");
126   if (Opts.DisableLLVMOpts)
127     Res.push_back("-disable-llvm-optzns");
128   if (Opts.DisableRedZone)
129     Res.push_back("-disable-red-zone");
130   if (!Opts.DwarfDebugFlags.empty()) {
131     Res.push_back("-dwarf-debug-flags");
132     Res.push_back(Opts.DwarfDebugFlags);
133   }
134   if (!Opts.MergeAllConstants)
135     Res.push_back("-fno-merge-all-constants");
136   if (Opts.NoCommon)
137     Res.push_back("-fno-common");
138   if (Opts.NoImplicitFloat)
139     Res.push_back("-no-implicit-float");
140   if (Opts.OmitLeafFramePointer)
141     Res.push_back("-momit-leaf-frame-pointer");
142   if (Opts.OptimizeSize) {
143     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
144     Res.push_back("-Os");
145   } else if (Opts.OptimizationLevel != 0)
146     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
147   if (!Opts.MainFileName.empty()) {
148     Res.push_back("-main-file-name");
149     Res.push_back(Opts.MainFileName);
150   }
151   // SimplifyLibCalls is only derived.
152   // TimePasses is only derived.
153   // UnitAtATime is unused.
154   // Inlining is only derived.
155 
156   // UnrollLoops is derived, but also accepts an option, no
157   // harm in pushing it back here.
158   if (Opts.UnrollLoops)
159     Res.push_back("-funroll-loops");
160   if (Opts.DataSections)
161     Res.push_back("-fdata-sections");
162   if (Opts.FunctionSections)
163     Res.push_back("-ffunction-sections");
164   if (Opts.AsmVerbose)
165     Res.push_back("-masm-verbose");
166   if (!Opts.CodeModel.empty()) {
167     Res.push_back("-mcode-model");
168     Res.push_back(Opts.CodeModel);
169   }
170   if (!Opts.CXAAtExit)
171     Res.push_back("-fno-use-cxa-atexit");
172   if (Opts.CXXCtorDtorAliases)
173     Res.push_back("-mconstructor-aliases");
174   if (!Opts.DebugPass.empty()) {
175     Res.push_back("-mdebug-pass");
176     Res.push_back(Opts.DebugPass);
177   }
178   if (Opts.DisableFPElim)
179     Res.push_back("-mdisable-fp-elim");
180   if (!Opts.FloatABI.empty()) {
181     Res.push_back("-mfloat-abi");
182     Res.push_back(Opts.FloatABI);
183   }
184   if (!Opts.LimitFloatPrecision.empty()) {
185     Res.push_back("-mlimit-float-precision");
186     Res.push_back(Opts.LimitFloatPrecision);
187   }
188   if (Opts.NoZeroInitializedInBSS)
189     Res.push_back("-mno-zero-initialized-bss");
190   switch (Opts.getObjCDispatchMethod()) {
191   case CodeGenOptions::Legacy:
192     break;
193   case CodeGenOptions::Mixed:
194     Res.push_back("-fobjc-dispatch-method=mixed");
195     break;
196   case CodeGenOptions::NonLegacy:
197     Res.push_back("-fobjc-dispatch-method=non-legacy");
198     break;
199   }
200   if (Opts.RelaxAll)
201     Res.push_back("-mrelax-all");
202   if (Opts.SoftFloat)
203     Res.push_back("-msoft-float");
204   if (Opts.UnwindTables)
205     Res.push_back("-munwind-tables");
206   if (Opts.RelocationModel != "pic") {
207     Res.push_back("-mrelocation-model");
208     Res.push_back(Opts.RelocationModel);
209   }
210   if (!Opts.VerifyModule)
211     Res.push_back("-disable-llvm-verifier");
212 }
213 
214 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
215                                        std::vector<std::string> &Res) {
216   if (Opts.IncludeSystemHeaders)
217     Res.push_back("-sys-header-deps");
218   if (Opts.UsePhonyTargets)
219     Res.push_back("-MP");
220   if (!Opts.OutputFile.empty()) {
221     Res.push_back("-dependency-file");
222     Res.push_back(Opts.OutputFile);
223   }
224   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
225     Res.push_back("-MT");
226     Res.push_back(Opts.Targets[i]);
227   }
228 }
229 
230 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
231                                  std::vector<std::string> &Res) {
232   if (Opts.IgnoreWarnings)
233     Res.push_back("-w");
234   if (Opts.NoRewriteMacros)
235     Res.push_back("-Wno-rewrite-macros");
236   if (Opts.Pedantic)
237     Res.push_back("-pedantic");
238   if (Opts.PedanticErrors)
239     Res.push_back("-pedantic-errors");
240   if (!Opts.ShowColumn)
241     Res.push_back("-fno-show-column");
242   if (!Opts.ShowLocation)
243     Res.push_back("-fno-show-source-location");
244   if (!Opts.ShowCarets)
245     Res.push_back("-fno-caret-diagnostics");
246   if (!Opts.ShowFixits)
247     Res.push_back("-fno-diagnostics-fixit-info");
248   if (Opts.ShowSourceRanges)
249     Res.push_back("-fdiagnostics-print-source-range-info");
250   if (Opts.ShowParseableFixits)
251     Res.push_back("-fdiagnostics-parseable-fixits");
252   if (Opts.ShowColors)
253     Res.push_back("-fcolor-diagnostics");
254   if (Opts.VerifyDiagnostics)
255     Res.push_back("-verify");
256   if (Opts.ShowOptionNames)
257     Res.push_back("-fdiagnostics-show-option");
258   if (Opts.ShowCategories == 1)
259     Res.push_back("-fdiagnostics-show-category=id");
260   else if (Opts.ShowCategories == 2)
261     Res.push_back("-fdiagnostics-show-category=name");
262   if (Opts.ErrorLimit) {
263     Res.push_back("-ferror-limit");
264     Res.push_back(llvm::utostr(Opts.ErrorLimit));
265   }
266   if (Opts.MacroBacktraceLimit
267                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
268     Res.push_back("-fmacro-backtrace-limit");
269     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
270   }
271   if (Opts.TemplateBacktraceLimit
272                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
273     Res.push_back("-ftemplate-backtrace-limit");
274     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
275   }
276 
277   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
278     Res.push_back("-ftabstop");
279     Res.push_back(llvm::utostr(Opts.TabStop));
280   }
281   if (Opts.MessageLength) {
282     Res.push_back("-fmessage-length");
283     Res.push_back(llvm::utostr(Opts.MessageLength));
284   }
285   if (!Opts.DumpBuildInformation.empty()) {
286     Res.push_back("-dump-build-information");
287     Res.push_back(Opts.DumpBuildInformation);
288   }
289   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
290     Res.push_back("-W" + Opts.Warnings[i]);
291 }
292 
293 static const char *getInputKindName(InputKind Kind) {
294   switch (Kind) {
295   case IK_None:              break;
296   case IK_AST:               return "ast";
297   case IK_Asm:               return "assembler-with-cpp";
298   case IK_C:                 return "c";
299   case IK_CXX:               return "c++";
300   case IK_LLVM_IR:           return "ir";
301   case IK_ObjC:              return "objective-c";
302   case IK_ObjCXX:            return "objective-c++";
303   case IK_OpenCL:            return "cl";
304   case IK_PreprocessedC:     return "cpp-output";
305   case IK_PreprocessedCXX:   return "c++-cpp-output";
306   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
307   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
308   }
309 
310   llvm_unreachable("Unexpected language kind!");
311   return 0;
312 }
313 
314 static const char *getActionName(frontend::ActionKind Kind) {
315   switch (Kind) {
316   case frontend::PluginAction:
317   case frontend::InheritanceView:
318     llvm_unreachable("Invalid kind!");
319 
320   case frontend::ASTDump:                return "-ast-dump";
321   case frontend::ASTPrint:               return "-ast-print";
322   case frontend::ASTPrintXML:            return "-ast-print-xml";
323   case frontend::ASTView:                return "-ast-view";
324   case frontend::BoostCon:               return "-boostcon";
325   case frontend::CreateModule:           return "-create-module";
326   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
327   case frontend::DumpTokens:             return "-dump-tokens";
328   case frontend::EmitAssembly:           return "-S";
329   case frontend::EmitBC:                 return "-emit-llvm-bc";
330   case frontend::EmitHTML:               return "-emit-html";
331   case frontend::EmitLLVM:               return "-emit-llvm";
332   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
333   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
334   case frontend::EmitObj:                return "-emit-obj";
335   case frontend::FixIt:                  return "-fixit";
336   case frontend::GeneratePCH:            return "-emit-pch";
337   case frontend::GeneratePTH:            return "-emit-pth";
338   case frontend::InitOnly:               return "-init-only";
339   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
340   case frontend::PrintDeclContext:       return "-print-decl-contexts";
341   case frontend::PrintPreamble:          return "-print-preamble";
342   case frontend::PrintPreprocessedInput: return "-E";
343   case frontend::RewriteMacros:          return "-rewrite-macros";
344   case frontend::RewriteObjC:            return "-rewrite-objc";
345   case frontend::RewriteTest:            return "-rewrite-test";
346   case frontend::RunAnalysis:            return "-analyze";
347   case frontend::RunPreprocessorOnly:    return "-Eonly";
348   }
349 
350   llvm_unreachable("Unexpected language kind!");
351   return 0;
352 }
353 
354 static void FrontendOptsToArgs(const FrontendOptions &Opts,
355                                std::vector<std::string> &Res) {
356   if (Opts.DisableFree)
357     Res.push_back("-disable-free");
358   if (Opts.RelocatablePCH)
359     Res.push_back("-relocatable-pch");
360   if (Opts.ChainedPCH)
361     Res.push_back("-chained-pch");
362   if (Opts.ShowHelp)
363     Res.push_back("-help");
364   if (Opts.ShowMacrosInCodeCompletion)
365     Res.push_back("-code-completion-macros");
366   if (Opts.ShowCodePatternsInCodeCompletion)
367     Res.push_back("-code-completion-patterns");
368   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
369     Res.push_back("-no-code-completion-globals");
370   if (Opts.ShowStats)
371     Res.push_back("-print-stats");
372   if (Opts.ShowTimers)
373     Res.push_back("-ftime-report");
374   if (Opts.ShowVersion)
375     Res.push_back("-version");
376   if (Opts.FixWhatYouCan)
377     Res.push_back("-fix-what-you-can");
378 
379   bool NeedLang = false;
380   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
381     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
382         Opts.Inputs[i].first)
383       NeedLang = true;
384   if (NeedLang) {
385     Res.push_back("-x");
386     Res.push_back(getInputKindName(Opts.Inputs[0].first));
387   }
388   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
389     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
390            "Unable to represent this input vector!");
391     Res.push_back(Opts.Inputs[i].second);
392   }
393 
394   if (!Opts.OutputFile.empty()) {
395     Res.push_back("-o");
396     Res.push_back(Opts.OutputFile);
397   }
398   if (!Opts.ViewClassInheritance.empty()) {
399     Res.push_back("-cxx-inheritance-view");
400     Res.push_back(Opts.ViewClassInheritance);
401   }
402   if (!Opts.CodeCompletionAt.FileName.empty()) {
403     Res.push_back("-code-completion-at");
404     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
405                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
406                   llvm::utostr(Opts.CodeCompletionAt.Column));
407   }
408   if (Opts.ProgramAction != frontend::InheritanceView &&
409       Opts.ProgramAction != frontend::PluginAction)
410     Res.push_back(getActionName(Opts.ProgramAction));
411   if (!Opts.ActionName.empty()) {
412     Res.push_back("-plugin");
413     Res.push_back(Opts.ActionName);
414     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
415       Res.push_back("-plugin-arg-" + Opts.ActionName);
416       Res.push_back(Opts.PluginArgs[i]);
417     }
418   }
419   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
420     Res.push_back("-load");
421     Res.push_back(Opts.Plugins[i]);
422   }
423   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
424     Res.push_back("-ast-merge");
425     Res.push_back(Opts.ASTMergeFiles[i]);
426   }
427   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
428     Res.push_back("-import-module");
429     Res.push_back(Opts.Modules[i]);
430   }
431   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
432     Res.push_back("-mllvm");
433     Res.push_back(Opts.LLVMArgs[i]);
434   }
435 }
436 
437 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
438                                    std::vector<std::string> &Res) {
439   if (Opts.Sysroot != "/") {
440     Res.push_back("-isysroot");
441     Res.push_back(Opts.Sysroot);
442   }
443 
444   for (unsigned i = 0, e = Opts.CXXSystemIncludes.size(); i != e; ++i) {
445     Res.push_back("-cxx-system-include");
446     Res.push_back(Opts.CXXSystemIncludes[i]);
447   }
448 
449   /// User specified include entries.
450   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
451     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
452     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
453       llvm::report_fatal_error("Invalid option set!");
454     if (E.IsUserSupplied) {
455       if (E.Group == frontend::After) {
456         Res.push_back("-idirafter");
457       } else if (E.Group == frontend::Quoted) {
458         Res.push_back("-iquote");
459       } else if (E.Group == frontend::System) {
460         Res.push_back("-isystem");
461       } else {
462         assert(E.Group == frontend::Angled && "Invalid group!");
463         Res.push_back(E.IsFramework ? "-F" : "-I");
464       }
465     } else {
466       if (E.Group != frontend::Angled && E.Group != frontend::System)
467         llvm::report_fatal_error("Invalid option set!");
468       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
469                     "-iwithprefix");
470     }
471     Res.push_back(E.Path);
472   }
473 
474   if (!Opts.EnvIncPath.empty()) {
475     // FIXME: Provide an option for this, and move env detection to driver.
476     llvm::report_fatal_error("Not yet implemented!");
477   }
478   if (!Opts.CEnvIncPath.empty()) {
479     // FIXME: Provide an option for this, and move env detection to driver.
480     llvm::report_fatal_error("Not yet implemented!");
481   }
482   if (!Opts.ObjCEnvIncPath.empty()) {
483     // FIXME: Provide an option for this, and move env detection to driver.
484     llvm::report_fatal_error("Not yet implemented!");
485   }
486   if (!Opts.CXXEnvIncPath.empty()) {
487     // FIXME: Provide an option for this, and move env detection to driver.
488     llvm::report_fatal_error("Not yet implemented!");
489   }
490   if (!Opts.ObjCXXEnvIncPath.empty()) {
491     // FIXME: Provide an option for this, and move env detection to driver.
492     llvm::report_fatal_error("Not yet implemented!");
493   }
494   if (!Opts.ResourceDir.empty()) {
495     Res.push_back("-resource-dir");
496     Res.push_back(Opts.ResourceDir);
497   }
498   if (!Opts.UseStandardIncludes)
499     Res.push_back("-nostdinc");
500   if (!Opts.UseStandardCXXIncludes)
501     Res.push_back("-nostdinc++");
502   if (Opts.Verbose)
503     Res.push_back("-v");
504 }
505 
506 static void LangOptsToArgs(const LangOptions &Opts,
507                            std::vector<std::string> &Res) {
508   LangOptions DefaultLangOpts;
509 
510   // FIXME: Need to set -std to get all the implicit options.
511 
512   // FIXME: We want to only pass options relative to the defaults, which
513   // requires constructing a target. :(
514   //
515   // It would be better to push the all target specific choices into the driver,
516   // so that everything below that was more uniform.
517 
518   if (Opts.Trigraphs)
519     Res.push_back("-trigraphs");
520   // Implicit based on the input kind:
521   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
522   // Implicit based on the input language standard:
523   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
524   if (Opts.DollarIdents)
525     Res.push_back("-fdollars-in-identifiers");
526   if (Opts.GNUMode && !Opts.GNUKeywords)
527     Res.push_back("-fno-gnu-keywords");
528   if (!Opts.GNUMode && Opts.GNUKeywords)
529     Res.push_back("-fgnu-keywords");
530   if (Opts.Microsoft)
531     Res.push_back("-fms-extensions");
532   if (Opts.Borland)
533     Res.push_back("-fborland-extensions");
534   if (Opts.ObjCNonFragileABI)
535     Res.push_back("-fobjc-nonfragile-abi");
536   if (Opts.ObjCNonFragileABI2)
537     Res.push_back("-fobjc-nonfragile-abi2");
538   // NoInline is implicit.
539   if (!Opts.CXXOperatorNames)
540     Res.push_back("-fno-operator-names");
541   if (Opts.PascalStrings)
542     Res.push_back("-fpascal-strings");
543   if (Opts.CatchUndefined)
544     Res.push_back("-fcatch-undefined-behavior");
545   if (Opts.WritableStrings)
546     Res.push_back("-fwritable-strings");
547   if (Opts.ConstStrings)
548     Res.push_back("-Wwrite-strings");
549   if (!Opts.LaxVectorConversions)
550     Res.push_back("-fno-lax-vector-conversions");
551   if (Opts.AltiVec)
552     Res.push_back("-faltivec");
553   if (Opts.Exceptions)
554     Res.push_back("-fexceptions");
555   if (Opts.SjLjExceptions)
556     Res.push_back("-fsjlj-exceptions");
557   if (!Opts.RTTI)
558     Res.push_back("-fno-rtti");
559   if (!Opts.NeXTRuntime)
560     Res.push_back("-fgnu-runtime");
561   if (Opts.Freestanding)
562     Res.push_back("-ffreestanding");
563   if (Opts.NoBuiltin)
564     Res.push_back("-fno-builtin");
565   if (!Opts.AssumeSaneOperatorNew)
566     Res.push_back("-fno-assume-sane-operator-new");
567   if (!Opts.ThreadsafeStatics)
568     Res.push_back("-fno-threadsafe-statics");
569   if (Opts.POSIXThreads)
570     Res.push_back("-pthread");
571   if (Opts.Blocks)
572     Res.push_back("-fblocks");
573   if (Opts.EmitAllDecls)
574     Res.push_back("-femit-all-decls");
575   if (Opts.MathErrno)
576     Res.push_back("-fmath-errno");
577   switch (Opts.getSignedOverflowBehavior()) {
578   case LangOptions::SOB_Undefined: break;
579   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
580   case LangOptions::SOB_Trapping:
581     Res.push_back("-ftrapv"); break;
582     if (!Opts.OverflowHandler.empty()) {
583       Res.push_back("-ftrapv-handler");
584       Res.push_back(Opts.OverflowHandler);
585     }
586   }
587   if (Opts.HeinousExtensions)
588     Res.push_back("-fheinous-gnu-extensions");
589   // Optimize is implicit.
590   // OptimizeSize is implicit.
591   if (Opts.Static)
592     Res.push_back("-static-define");
593   if (Opts.DumpRecordLayouts)
594     Res.push_back("-fdump-record-layouts");
595   if (Opts.DumpVTableLayouts)
596     Res.push_back("-fdump-vtable-layouts");
597   if (Opts.NoBitFieldTypeAlign)
598     Res.push_back("-fno-bitfield-type-alignment");
599   if (Opts.SjLjExceptions)
600     Res.push_back("-fsjlj-exceptions");
601   if (Opts.PICLevel) {
602     Res.push_back("-pic-level");
603     Res.push_back(llvm::utostr(Opts.PICLevel));
604   }
605   if (Opts.ObjCGCBitmapPrint)
606     Res.push_back("-print-ivar-layout");
607   if (Opts.NoConstantCFStrings)
608     Res.push_back("-fno-constant-cfstrings");
609   if (!Opts.AccessControl)
610     Res.push_back("-fno-access-control");
611   if (!Opts.CharIsSigned)
612     Res.push_back("-fno-signed-char");
613   if (Opts.ShortWChar)
614     Res.push_back("-fshort-wchar");
615   if (!Opts.ElideConstructors)
616     Res.push_back("-fno-elide-constructors");
617   if (Opts.getGCMode() != LangOptions::NonGC) {
618     if (Opts.getGCMode() == LangOptions::HybridGC) {
619       Res.push_back("-fobjc-gc");
620     } else {
621       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
622       Res.push_back("-fobjc-gc-only");
623     }
624   }
625   if (Opts.getVisibilityMode() != LangOptions::Default) {
626     Res.push_back("-fvisibility");
627     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
628       Res.push_back("hidden");
629     } else {
630       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
631              "Invalid visibility!");
632       Res.push_back("protected");
633     }
634   }
635   if (Opts.InlineVisibilityHidden)
636     Res.push_back("-fvisibility-inlines-hidden");
637 
638   if (Opts.getStackProtectorMode() != 0) {
639     Res.push_back("-stack-protector");
640     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
641   }
642   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
643     Res.push_back("-ftemplate-depth");
644     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
645   }
646   if (!Opts.ObjCConstantStringClass.empty()) {
647     Res.push_back("-fconstant-string-class");
648     Res.push_back(Opts.ObjCConstantStringClass);
649   }
650 }
651 
652 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
653                                    std::vector<std::string> &Res) {
654   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
655     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
656                   Opts.Macros[i].first);
657   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
658     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
659     Res.push_back("-include");
660     Res.push_back(Opts.Includes[i]);
661   }
662   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
663     Res.push_back("-imacros");
664     Res.push_back(Opts.MacroIncludes[i]);
665   }
666   if (!Opts.UsePredefines)
667     Res.push_back("-undef");
668   if (Opts.DetailedRecord)
669     Res.push_back("-detailed-preprocessing-record");
670   if (!Opts.ImplicitPCHInclude.empty()) {
671     Res.push_back("-include-pch");
672     Res.push_back(Opts.ImplicitPCHInclude);
673   }
674   if (!Opts.ImplicitPTHInclude.empty()) {
675     Res.push_back("-include-pth");
676     Res.push_back(Opts.ImplicitPTHInclude);
677   }
678   if (!Opts.TokenCache.empty()) {
679     if (Opts.ImplicitPTHInclude.empty()) {
680       Res.push_back("-token-cache");
681       Res.push_back(Opts.TokenCache);
682     } else
683       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
684              "Unsupported option combination!");
685   }
686   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
687     Res.push_back("-remap-file");
688     Res.push_back(Opts.RemappedFiles[i].first + ";" +
689                   Opts.RemappedFiles[i].second);
690   }
691 }
692 
693 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
694                                          std::vector<std::string> &Res) {
695   if (!Opts.ShowCPP && !Opts.ShowMacros)
696     llvm::report_fatal_error("Invalid option combination!");
697 
698   if (Opts.ShowCPP && Opts.ShowMacros)
699     Res.push_back("-dD");
700   else if (!Opts.ShowCPP && Opts.ShowMacros)
701     Res.push_back("-dM");
702 
703   if (Opts.ShowHeaderIncludes)
704     Res.push_back("-H");
705   if (!Opts.ShowLineMarkers)
706     Res.push_back("-P");
707   if (Opts.ShowComments)
708     Res.push_back("-C");
709   if (Opts.ShowMacroComments)
710     Res.push_back("-CC");
711 }
712 
713 static void TargetOptsToArgs(const TargetOptions &Opts,
714                              std::vector<std::string> &Res) {
715   Res.push_back("-triple");
716   Res.push_back(Opts.Triple);
717   if (!Opts.CPU.empty()) {
718     Res.push_back("-target-cpu");
719     Res.push_back(Opts.CPU);
720   }
721   if (!Opts.ABI.empty()) {
722     Res.push_back("-target-abi");
723     Res.push_back(Opts.ABI);
724   }
725   if (!Opts.LinkerVersion.empty()) {
726     Res.push_back("-target-linker-version");
727     Res.push_back(Opts.LinkerVersion);
728   }
729   if (!Opts.CXXABI.empty()) {
730     Res.push_back("-cxx-abi");
731     Res.push_back(Opts.CXXABI);
732   }
733   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
734     Res.push_back("-target-feature");
735     Res.push_back(Opts.Features[i]);
736   }
737 }
738 
739 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
740   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
741   CodeGenOptsToArgs(getCodeGenOpts(), Res);
742   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
743   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
744   FrontendOptsToArgs(getFrontendOpts(), Res);
745   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
746   LangOptsToArgs(getLangOpts(), Res);
747   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
748   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
749   TargetOptsToArgs(getTargetOpts(), Res);
750 }
751 
752 //===----------------------------------------------------------------------===//
753 // Deserialization (to args)
754 //===----------------------------------------------------------------------===//
755 
756 using namespace clang::driver;
757 using namespace clang::driver::cc1options;
758 
759 //
760 
761 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
762                               Diagnostic &Diags) {
763   using namespace cc1options;
764 
765   Opts.AnalysisList.clear();
766 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
767   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
768 #include "clang/Frontend/Analyses.def"
769 
770   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
771     llvm::StringRef Name = A->getValue(Args);
772     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
773 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
774       .Case(CMDFLAG, NAME##Model)
775 #include "clang/Frontend/Analyses.def"
776       .Default(NumStores);
777     // FIXME: Error handling.
778     if (Value == NumStores)
779       Diags.Report(diag::err_drv_invalid_value)
780         << A->getAsString(Args) << Name;
781     else
782       Opts.AnalysisStoreOpt = Value;
783   }
784 
785   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
786     llvm::StringRef Name = A->getValue(Args);
787     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
788 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
789       .Case(CMDFLAG, NAME##Model)
790 #include "clang/Frontend/Analyses.def"
791       .Default(NumConstraints);
792     // FIXME: Error handling.
793     if (Value == NumConstraints)
794       Diags.Report(diag::err_drv_invalid_value)
795         << A->getAsString(Args) << Name;
796     else
797       Opts.AnalysisConstraintsOpt = Value;
798   }
799 
800   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
801     llvm::StringRef Name = A->getValue(Args);
802     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
803 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
804       .Case(CMDFLAG, PD_##NAME)
805 #include "clang/Frontend/Analyses.def"
806       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
807     // FIXME: Error handling.
808     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
809       Diags.Report(diag::err_drv_invalid_value)
810         << A->getAsString(Args) << Name;
811     else
812       Opts.AnalysisDiagOpt = Value;
813   }
814 
815   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
816   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
817   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
818   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
819   Opts.AnalyzeNestedBlocks =
820     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
821   Opts.AnalyzerStats = Args.hasArg(OPT_analysis_AnalyzerStats);
822   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
823   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
824   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
825   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
826   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
827   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
828   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
829   Opts.EnableExperimentalInternalChecks =
830     Args.hasArg(OPT_analyzer_experimental_internal_checks);
831   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
832   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
833   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 3, Diags);
834   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
835   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
836 }
837 
838 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
839                              Diagnostic &Diags) {
840   using namespace cc1options;
841   // -Os implies -O2
842   if (Args.hasArg(OPT_Os))
843     Opts.OptimizationLevel = 2;
844   else {
845     Opts.OptimizationLevel = Args.getLastArgIntValue(OPT_O, 0, Diags);
846     if (Opts.OptimizationLevel > 3) {
847       Diags.Report(diag::err_drv_invalid_value)
848         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
849       Opts.OptimizationLevel = 3;
850     }
851   }
852 
853   // We must always run at least the always inlining pass.
854   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
855     : CodeGenOptions::OnlyAlwaysInlining;
856 
857   Opts.DebugInfo = Args.hasArg(OPT_g);
858   Opts.LimitDebugInfo = Args.hasArg(OPT_flimit_debug_info);
859   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
860   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
861   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
862   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
863   Opts.NoCommon = Args.hasArg(OPT_fno_common);
864   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
865   Opts.OptimizeSize = Args.hasArg(OPT_Os);
866   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
867                             Args.hasArg(OPT_ffreestanding));
868   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
869                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
870 
871   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
872   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
873   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
874   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
875   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
876   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
877   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
878   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
879   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
880   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
881   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
882   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
883   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
884   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
885   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
886 
887   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
888   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
889 
890   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
891   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
892 
893   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
894 
895   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
896     llvm::StringRef Name = A->getValue(Args);
897     unsigned Method = llvm::StringSwitch<unsigned>(Name)
898       .Case("legacy", CodeGenOptions::Legacy)
899       .Case("non-legacy", CodeGenOptions::NonLegacy)
900       .Case("mixed", CodeGenOptions::Mixed)
901       .Default(~0U);
902     if (Method == ~0U)
903       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
904     else
905       Opts.ObjCDispatchMethod = Method;
906   }
907 }
908 
909 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
910                                       ArgList &Args) {
911   using namespace cc1options;
912   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
913   Opts.Targets = Args.getAllArgValues(OPT_MT);
914   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
915   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
916 }
917 
918 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
919                                 Diagnostic &Diags) {
920   using namespace cc1options;
921   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
922   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
923   Opts.Pedantic = Args.hasArg(OPT_pedantic);
924   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
925   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
926   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
927   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
928   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
929   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
930   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
931 
932   llvm::StringRef ShowOverloads =
933     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
934   if (ShowOverloads == "best")
935     Opts.ShowOverloads = Diagnostic::Ovl_Best;
936   else if (ShowOverloads == "all")
937     Opts.ShowOverloads = Diagnostic::Ovl_All;
938   else
939     Diags.Report(diag::err_drv_invalid_value)
940       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
941       << ShowOverloads;
942 
943   llvm::StringRef ShowCategory =
944     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
945   if (ShowCategory == "none")
946     Opts.ShowCategories = 0;
947   else if (ShowCategory == "id")
948     Opts.ShowCategories = 1;
949   else if (ShowCategory == "name")
950     Opts.ShowCategories = 2;
951   else
952     Diags.Report(diag::err_drv_invalid_value)
953       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
954       << ShowCategory;
955 
956   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
957   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
958   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
959   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
960   Opts.MacroBacktraceLimit
961     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
962                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
963   Opts.TemplateBacktraceLimit
964     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
965                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
966                          Diags);
967   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
968                                     DiagnosticOptions::DefaultTabStop, Diags);
969   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
970     Diags.Report(diag::warn_ignoring_ftabstop_value)
971       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
972     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
973   }
974   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
975   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
976   Opts.Warnings = Args.getAllArgValues(OPT_W);
977 }
978 
979 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
980                                    Diagnostic &Diags) {
981   using namespace cc1options;
982   Opts.ProgramAction = frontend::ParseSyntaxOnly;
983   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
984     switch (A->getOption().getID()) {
985     default:
986       assert(0 && "Invalid option in group!");
987     case OPT_ast_dump:
988       Opts.ProgramAction = frontend::ASTDump; break;
989     case OPT_ast_print:
990       Opts.ProgramAction = frontend::ASTPrint; break;
991     case OPT_ast_print_xml:
992       Opts.ProgramAction = frontend::ASTPrintXML; break;
993     case OPT_ast_view:
994       Opts.ProgramAction = frontend::ASTView; break;
995     case OPT_boostcon:
996       Opts.ProgramAction = frontend::BoostCon; break;
997     case OPT_dump_raw_tokens:
998       Opts.ProgramAction = frontend::DumpRawTokens; break;
999     case OPT_dump_tokens:
1000       Opts.ProgramAction = frontend::DumpTokens; break;
1001     case OPT_S:
1002       Opts.ProgramAction = frontend::EmitAssembly; break;
1003     case OPT_emit_llvm_bc:
1004       Opts.ProgramAction = frontend::EmitBC; break;
1005     case OPT_emit_html:
1006       Opts.ProgramAction = frontend::EmitHTML; break;
1007     case OPT_emit_llvm:
1008       Opts.ProgramAction = frontend::EmitLLVM; break;
1009     case OPT_emit_llvm_only:
1010       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1011     case OPT_emit_codegen_only:
1012       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1013     case OPT_emit_obj:
1014       Opts.ProgramAction = frontend::EmitObj; break;
1015     case OPT_fixit_EQ:
1016       Opts.FixItSuffix = A->getValue(Args);
1017       // fall-through!
1018     case OPT_fixit:
1019       Opts.ProgramAction = frontend::FixIt; break;
1020     case OPT_emit_pch:
1021       Opts.ProgramAction = frontend::GeneratePCH; break;
1022     case OPT_emit_pth:
1023       Opts.ProgramAction = frontend::GeneratePTH; break;
1024     case OPT_init_only:
1025       Opts.ProgramAction = frontend::InitOnly; break;
1026     case OPT_fsyntax_only:
1027       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1028     case OPT_print_decl_contexts:
1029       Opts.ProgramAction = frontend::PrintDeclContext; break;
1030     case OPT_print_preamble:
1031       Opts.ProgramAction = frontend::PrintPreamble; break;
1032     case OPT_E:
1033       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1034     case OPT_rewrite_macros:
1035       Opts.ProgramAction = frontend::RewriteMacros; break;
1036     case OPT_rewrite_objc:
1037       Opts.ProgramAction = frontend::RewriteObjC; break;
1038     case OPT_rewrite_test:
1039       Opts.ProgramAction = frontend::RewriteTest; break;
1040     case OPT_analyze:
1041       Opts.ProgramAction = frontend::RunAnalysis; break;
1042     case OPT_Eonly:
1043       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1044     case OPT_create_module:
1045       Opts.ProgramAction = frontend::CreateModule; break;
1046     }
1047   }
1048 
1049   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1050     Opts.Plugins.push_back(A->getValue(Args,0));
1051     Opts.ProgramAction = frontend::PluginAction;
1052     Opts.ActionName = A->getValue(Args);
1053 
1054     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1055            end = Args.filtered_end(); it != end; ++it) {
1056       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1057         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1058     }
1059   }
1060 
1061   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1062     Opts.CodeCompletionAt =
1063       ParsedSourceLocation::FromString(A->getValue(Args));
1064     if (Opts.CodeCompletionAt.FileName.empty())
1065       Diags.Report(diag::err_drv_invalid_value)
1066         << A->getAsString(Args) << A->getValue(Args);
1067   }
1068   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1069 
1070   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1071   Opts.Plugins = Args.getAllArgValues(OPT_load);
1072   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1073   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1074   Opts.ShowHelp = Args.hasArg(OPT_help);
1075   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1076   Opts.ShowCodePatternsInCodeCompletion
1077     = Args.hasArg(OPT_code_completion_patterns);
1078   Opts.ShowGlobalSymbolsInCodeCompletion
1079     = !Args.hasArg(OPT_no_code_completion_globals);
1080   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1081   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1082   Opts.ShowVersion = Args.hasArg(OPT_version);
1083   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1084   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1085   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1086   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1087   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1088 
1089   InputKind DashX = IK_None;
1090   if (const Arg *A = Args.getLastArg(OPT_x)) {
1091     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1092       .Case("c", IK_C)
1093       .Case("cl", IK_OpenCL)
1094       .Case("c", IK_C)
1095       .Case("cl", IK_OpenCL)
1096       .Case("c++", IK_CXX)
1097       .Case("objective-c", IK_ObjC)
1098       .Case("objective-c++", IK_ObjCXX)
1099       .Case("cpp-output", IK_PreprocessedC)
1100       .Case("assembler-with-cpp", IK_Asm)
1101       .Case("c++-cpp-output", IK_PreprocessedCXX)
1102       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1103       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1104       .Case("c-header", IK_C)
1105       .Case("objective-c-header", IK_ObjC)
1106       .Case("c++-header", IK_CXX)
1107       .Case("objective-c++-header", IK_ObjCXX)
1108       .Case("ast", IK_AST)
1109       .Case("ir", IK_LLVM_IR)
1110       .Default(IK_None);
1111     if (DashX == IK_None)
1112       Diags.Report(diag::err_drv_invalid_value)
1113         << A->getAsString(Args) << A->getValue(Args);
1114   }
1115 
1116   // '-' is the default input if none is given.
1117   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1118   Opts.Inputs.clear();
1119   if (Inputs.empty())
1120     Inputs.push_back("-");
1121   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1122     InputKind IK = DashX;
1123     if (IK == IK_None) {
1124       IK = FrontendOptions::getInputKindForExtension(
1125         llvm::StringRef(Inputs[i]).rsplit('.').second);
1126       // FIXME: Remove this hack.
1127       if (i == 0)
1128         DashX = IK;
1129     }
1130     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1131   }
1132 
1133   return DashX;
1134 }
1135 
1136 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1137                                                  void *MainAddr) {
1138   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1139 
1140   if (!P.isEmpty()) {
1141     P.eraseComponent();  // Remove /clang from foo/bin/clang
1142     P.eraseComponent();  // Remove /bin   from foo/bin
1143 
1144     // Get foo/lib/clang/<version>/include
1145     P.appendComponent("lib");
1146     P.appendComponent("clang");
1147     P.appendComponent(CLANG_VERSION_STRING);
1148   }
1149 
1150   return P.str();
1151 }
1152 
1153 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1154   using namespace cc1options;
1155   Opts.CXXSystemIncludes = Args.getAllArgValues(OPT_cxx_system_include);
1156   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1157   Opts.Verbose = Args.hasArg(OPT_v);
1158   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1159   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1160   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1161   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1162 
1163   // Add -I... and -F... options in order.
1164   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1165          ie = Args.filtered_end(); it != ie; ++it)
1166     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1167                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1168 
1169   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1170   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1171   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1172                                              OPT_iwithprefixbefore),
1173          ie = Args.filtered_end(); it != ie; ++it) {
1174     const Arg *A = *it;
1175     if (A->getOption().matches(OPT_iprefix))
1176       Prefix = A->getValue(Args);
1177     else if (A->getOption().matches(OPT_iwithprefix))
1178       Opts.AddPath(Prefix.str() + A->getValue(Args),
1179                    frontend::System, false, false, true);
1180     else
1181       Opts.AddPath(Prefix.str() + A->getValue(Args),
1182                    frontend::Angled, false, false, true);
1183   }
1184 
1185   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1186          ie = Args.filtered_end(); it != ie; ++it)
1187     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1188   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1189          ie = Args.filtered_end(); it != ie; ++it)
1190     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1191   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1192          ie = Args.filtered_end(); it != ie; ++it)
1193     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1194                  (*it)->getOption().matches(OPT_iwithsysroot));
1195 
1196   // FIXME: Need options for the various environment variables!
1197 }
1198 
1199 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1200                           Diagnostic &Diags) {
1201   // FIXME: Cleanup per-file based stuff.
1202 
1203   // Set some properties which depend soley on the input kind; it would be nice
1204   // to move these to the language standard, and have the driver resolve the
1205   // input kind + language standard.
1206   if (IK == IK_Asm) {
1207     Opts.AsmPreprocessor = 1;
1208   } else if (IK == IK_ObjC ||
1209              IK == IK_ObjCXX ||
1210              IK == IK_PreprocessedObjC ||
1211              IK == IK_PreprocessedObjCXX) {
1212     Opts.ObjC1 = Opts.ObjC2 = 1;
1213   }
1214 
1215   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1216   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1217     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1218 #define LANGSTANDARD(id, name, desc, features) \
1219       .Case(name, LangStandard::lang_##id)
1220 #include "clang/Frontend/LangStandards.def"
1221       .Default(LangStandard::lang_unspecified);
1222     if (LangStd == LangStandard::lang_unspecified)
1223       Diags.Report(diag::err_drv_invalid_value)
1224         << A->getAsString(Args) << A->getValue(Args);
1225   }
1226 
1227   if (LangStd == LangStandard::lang_unspecified) {
1228     // Based on the base language, pick one.
1229     switch (IK) {
1230     case IK_None:
1231     case IK_AST:
1232     case IK_LLVM_IR:
1233       assert(0 && "Invalid input kind!");
1234     case IK_OpenCL:
1235       LangStd = LangStandard::lang_opencl;
1236       break;
1237     case IK_Asm:
1238     case IK_C:
1239     case IK_PreprocessedC:
1240     case IK_ObjC:
1241     case IK_PreprocessedObjC:
1242       LangStd = LangStandard::lang_gnu99;
1243       break;
1244     case IK_CXX:
1245     case IK_PreprocessedCXX:
1246     case IK_ObjCXX:
1247     case IK_PreprocessedObjCXX:
1248       LangStd = LangStandard::lang_gnucxx98;
1249       break;
1250     }
1251   }
1252 
1253   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1254   Opts.BCPLComment = Std.hasBCPLComments();
1255   Opts.C99 = Std.isC99();
1256   Opts.CPlusPlus = Std.isCPlusPlus();
1257   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1258   Opts.Digraphs = Std.hasDigraphs();
1259   Opts.GNUMode = Std.isGNUMode();
1260   Opts.GNUInline = !Std.isC99();
1261   Opts.HexFloats = Std.hasHexFloats();
1262   Opts.ImplicitInt = Std.hasImplicitInt();
1263 
1264   // OpenCL has some additional defaults.
1265   if (LangStd == LangStandard::lang_opencl) {
1266     Opts.OpenCL = 1;
1267     Opts.AltiVec = 1;
1268     Opts.CXXOperatorNames = 1;
1269     Opts.LaxVectorConversions = 1;
1270   }
1271 
1272   // OpenCL and C++ both have bool, true, false keywords.
1273   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1274 
1275   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1276   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1277   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1278   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1279   // name, as it doesn't seem a useful distinction.
1280   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1281                                   Opts.GNUMode);
1282 
1283   if (Opts.CPlusPlus)
1284     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1285 
1286   if (Args.hasArg(OPT_fobjc_gc_only))
1287     Opts.setGCMode(LangOptions::GCOnly);
1288   else if (Args.hasArg(OPT_fobjc_gc))
1289     Opts.setGCMode(LangOptions::HybridGC);
1290 
1291   if (Args.hasArg(OPT_print_ivar_layout))
1292     Opts.ObjCGCBitmapPrint = 1;
1293   if (Args.hasArg(OPT_fno_constant_cfstrings))
1294     Opts.NoConstantCFStrings = 1;
1295 
1296   if (Args.hasArg(OPT_faltivec))
1297     Opts.AltiVec = 1;
1298 
1299   if (Args.hasArg(OPT_pthread))
1300     Opts.POSIXThreads = 1;
1301 
1302   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1303   if (Vis == "default")
1304     Opts.setVisibilityMode(LangOptions::Default);
1305   else if (Vis == "hidden")
1306     Opts.setVisibilityMode(LangOptions::Hidden);
1307   else if (Vis == "protected")
1308     Opts.setVisibilityMode(LangOptions::Protected);
1309   else
1310     Diags.Report(diag::err_drv_invalid_value)
1311       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1312 
1313   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1314     Opts.InlineVisibilityHidden = 1;
1315 
1316   if (Args.hasArg(OPT_ftrapv)) {
1317     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1318     // Set the handler, if one is specified.
1319     Opts.OverflowHandler =
1320         Args.getLastArgValue(OPT_ftrapv_handler);
1321   }
1322   else if (Args.hasArg(OPT_fwrapv))
1323     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1324 
1325   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1326   // is specified, or -std is set to a conforming mode.
1327   Opts.Trigraphs = !Opts.GNUMode;
1328   if (Args.hasArg(OPT_trigraphs))
1329     Opts.Trigraphs = 1;
1330 
1331   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1332                                    OPT_fno_dollars_in_identifiers,
1333                                    !Opts.AsmPreprocessor);
1334   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1335   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1336   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1337   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1338   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1339   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1340     Opts.LaxVectorConversions = 0;
1341   if (Args.hasArg(OPT_fno_threadsafe_statics))
1342     Opts.ThreadsafeStatics = 0;
1343   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1344   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1345   Opts.Blocks = Args.hasArg(OPT_fblocks);
1346   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1347   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1348   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1349   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1350   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1351   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1352   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1353   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1354   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1355   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1356   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1357                                                Diags);
1358   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1359   Opts.ObjCConstantStringClass =
1360     Args.getLastArgValue(OPT_fconstant_string_class);
1361   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1362   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1363   if (Opts.ObjCNonFragileABI2)
1364     Opts.ObjCNonFragileABI = true;
1365   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1366   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1367   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1368   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1369   Opts.Static = Args.hasArg(OPT_static_define);
1370   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1371   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1372   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1373   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1374   Opts.OptimizeSize = 0;
1375 
1376   // FIXME: Eliminate this dependency.
1377   unsigned Opt =
1378     Args.hasArg(OPT_Os) ? 2 : Args.getLastArgIntValue(OPT_O, 0, Diags);
1379   Opts.Optimize = Opt != 0;
1380 
1381   // This is the __NO_INLINE__ define, which just depends on things like the
1382   // optimization level and -fno-inline, not actually whether the backend has
1383   // inlining enabled.
1384   //
1385   // FIXME: This is affected by other options (-fno-inline).
1386   Opts.NoInline = !Opt;
1387 
1388   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1389   switch (SSP) {
1390   default:
1391     Diags.Report(diag::err_drv_invalid_value)
1392       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1393     break;
1394   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1395   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1396   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1397   }
1398 }
1399 
1400 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1401                                   Diagnostic &Diags) {
1402   using namespace cc1options;
1403   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1404   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1405   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1406       Opts.TokenCache = A->getValue(Args);
1407   else
1408     Opts.TokenCache = Opts.ImplicitPTHInclude;
1409   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1410   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1411   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1412 
1413   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1414     llvm::StringRef Value(A->getValue(Args));
1415     size_t Comma = Value.find(',');
1416     unsigned Bytes = 0;
1417     unsigned EndOfLine = 0;
1418 
1419     if (Comma == llvm::StringRef::npos ||
1420         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1421         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1422       Diags.Report(diag::err_drv_preamble_format);
1423     else {
1424       Opts.PrecompiledPreambleBytes.first = Bytes;
1425       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1426     }
1427   }
1428 
1429   // Add macros from the command line.
1430   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1431          ie = Args.filtered_end(); it != ie; ++it) {
1432     if ((*it)->getOption().matches(OPT_D))
1433       Opts.addMacroDef((*it)->getValue(Args));
1434     else
1435       Opts.addMacroUndef((*it)->getValue(Args));
1436   }
1437 
1438   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1439 
1440   // Add the ordered list of -includes.
1441   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1442                                              OPT_include_pth),
1443          ie = Args.filtered_end(); it != ie; ++it) {
1444     const Arg *A = *it;
1445     // PCH is handled specially, we need to extra the original include path.
1446     if (A->getOption().matches(OPT_include_pch)) {
1447       std::string OriginalFile =
1448         ASTReader::getOriginalSourceFile(A->getValue(Args), Diags);
1449       if (OriginalFile.empty())
1450         continue;
1451 
1452       Opts.Includes.push_back(OriginalFile);
1453     } else
1454       Opts.Includes.push_back(A->getValue(Args));
1455   }
1456 
1457   // Include 'altivec.h' if -faltivec option present
1458   if (Args.hasArg(OPT_faltivec))
1459     Opts.Includes.push_back("altivec.h");
1460 
1461   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1462          ie = Args.filtered_end(); it != ie; ++it) {
1463     const Arg *A = *it;
1464     std::pair<llvm::StringRef,llvm::StringRef> Split =
1465       llvm::StringRef(A->getValue(Args)).split(';');
1466 
1467     if (Split.second.empty()) {
1468       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1469       continue;
1470     }
1471 
1472     Opts.addRemappedFile(Split.first, Split.second);
1473   }
1474 }
1475 
1476 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1477                                         ArgList &Args) {
1478   using namespace cc1options;
1479   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1480   Opts.ShowComments = Args.hasArg(OPT_C);
1481   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1482   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1483   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1484   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1485 }
1486 
1487 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1488   using namespace cc1options;
1489   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1490   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1491   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1492   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1493   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1494   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1495 
1496   // Use the host triple if unspecified.
1497   if (Opts.Triple.empty())
1498     Opts.Triple = llvm::sys::getHostTriple();
1499 }
1500 
1501 //
1502 
1503 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1504                                         const char* const *ArgBegin,
1505                                         const char* const *ArgEnd,
1506                                         Diagnostic &Diags) {
1507   // Parse the arguments.
1508   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1509   unsigned MissingArgIndex, MissingArgCount;
1510   llvm::OwningPtr<InputArgList> Args(
1511     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1512 
1513   // Check for missing argument error.
1514   if (MissingArgCount)
1515     Diags.Report(diag::err_drv_missing_argument)
1516       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1517 
1518   // Issue errors on unknown arguments.
1519   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1520          ie = Args->filtered_end(); it != ie; ++it)
1521     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1522 
1523   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1524   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1525   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1526   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1527   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1528   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1529   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1530     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1531   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1532   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1533   ParseTargetArgs(Res.getTargetOpts(), *Args);
1534 }
1535