xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 784fad7a4134c9504f7c3efa292e8a7b43155a2c) 
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/Frontend/PCHReader.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/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // VerifyModule is only derived.
149   // Inlining is only derived.
150 
151   if (Opts.DataSections)
152     Res.push_back("-fdata-sections");
153   if (Opts.FunctionSections)
154     Res.push_back("-ffunction-sections");
155   if (Opts.AsmVerbose)
156     Res.push_back("-masm-verbose");
157   if (!Opts.CodeModel.empty()) {
158     Res.push_back("-mcode-model");
159     Res.push_back(Opts.CodeModel);
160   }
161   if (!Opts.CXAAtExit)
162     Res.push_back("-fno-use-cxa-atexit");
163   if (Opts.CXXCtorDtorAliases)
164     Res.push_back("-mconstructor-aliases");
165   if (!Opts.DebugPass.empty()) {
166     Res.push_back("-mdebug-pass");
167     Res.push_back(Opts.DebugPass);
168   }
169   if (Opts.DisableFPElim)
170     Res.push_back("-mdisable-fp-elim");
171   if (!Opts.FloatABI.empty()) {
172     Res.push_back("-mfloat-abi");
173     Res.push_back(Opts.FloatABI);
174   }
175   if (!Opts.LimitFloatPrecision.empty()) {
176     Res.push_back("-mlimit-float-precision");
177     Res.push_back(Opts.LimitFloatPrecision);
178   }
179   if (Opts.NoZeroInitializedInBSS)
180     Res.push_back("-mno-zero-initialized-bss");
181   if (Opts.ObjCLegacyDispatch)
182     Res.push_back("-fobjc-legacy-dispatch");
183   if (Opts.SoftFloat)
184     Res.push_back("-msoft-float");
185   if (Opts.UnwindTables)
186     Res.push_back("-munwind-tables");
187   if (Opts.RelocationModel != "pic") {
188     Res.push_back("-mrelocation-model");
189     Res.push_back(Opts.RelocationModel);
190   }
191   if (!Opts.VerifyModule)
192     Res.push_back("-disable-llvm-verifier");
193 }
194 
195 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
196                                        std::vector<std::string> &Res) {
197   if (Opts.IncludeSystemHeaders)
198     Res.push_back("-sys-header-deps");
199   if (Opts.UsePhonyTargets)
200     Res.push_back("-MP");
201   if (!Opts.OutputFile.empty()) {
202     Res.push_back("-dependency-file");
203     Res.push_back(Opts.OutputFile);
204   }
205   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
206     Res.push_back("-MT");
207     Res.push_back(Opts.Targets[i]);
208   }
209 }
210 
211 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
212                                  std::vector<std::string> &Res) {
213   if (Opts.IgnoreWarnings)
214     Res.push_back("-w");
215   if (Opts.NoRewriteMacros)
216     Res.push_back("-Wno-rewrite-macros");
217   if (Opts.Pedantic)
218     Res.push_back("-pedantic");
219   if (Opts.PedanticErrors)
220     Res.push_back("-pedantic-errors");
221   if (!Opts.ShowColumn)
222     Res.push_back("-fno-show-column");
223   if (!Opts.ShowLocation)
224     Res.push_back("-fno-show-source-location");
225   if (!Opts.ShowCarets)
226     Res.push_back("-fno-caret-diagnostics");
227   if (!Opts.ShowFixits)
228     Res.push_back("-fno-diagnostics-fixit-info");
229   if (Opts.ShowSourceRanges)
230     Res.push_back("-fdiagnostics-print-source-range-info");
231   if (Opts.ShowColors)
232     Res.push_back("-fcolor-diagnostics");
233   if (Opts.VerifyDiagnostics)
234     Res.push_back("-verify");
235   if (Opts.BinaryOutput)
236     Res.push_back("-fdiagnostics-binary");
237   if (Opts.ShowOptionNames)
238     Res.push_back("-fdiagnostics-show-option");
239   if (Opts.ErrorLimit) {
240     Res.push_back("-ferror-limit");
241     Res.push_back(llvm::utostr(Opts.ErrorLimit));
242   }
243   if (Opts.TemplateBacktraceLimit != 10) {
244     Res.push_back("-ftemplate-backtrace-limit");
245     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
246   }
247 
248   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
249     Res.push_back("-ftabstop");
250     Res.push_back(llvm::utostr(Opts.TabStop));
251   }
252   if (Opts.MessageLength) {
253     Res.push_back("-fmessage-length");
254     Res.push_back(llvm::utostr(Opts.MessageLength));
255   }
256   if (!Opts.DumpBuildInformation.empty()) {
257     Res.push_back("-dump-build-information");
258     Res.push_back(Opts.DumpBuildInformation);
259   }
260   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
261     Res.push_back("-W" + Opts.Warnings[i]);
262 }
263 
264 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
265   switch (Kind) {
266   case FrontendOptions::IK_None:              break;
267   case FrontendOptions::IK_AST:               return "ast";
268   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
269   case FrontendOptions::IK_C:                 return "c";
270   case FrontendOptions::IK_CXX:               return "c++";
271   case FrontendOptions::IK_ObjC:              return "objective-c";
272   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
273   case FrontendOptions::IK_OpenCL:            return "cl";
274   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
275   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
276   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
277   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
278   }
279 
280   llvm_unreachable("Unexpected language kind!");
281   return 0;
282 }
283 
284 static const char *getActionName(frontend::ActionKind Kind) {
285   switch (Kind) {
286   case frontend::PluginAction:
287   case frontend::InheritanceView:
288     llvm_unreachable("Invalid kind!");
289 
290   case frontend::ASTDump:                return "-ast-dump";
291   case frontend::ASTPrint:               return "-ast-print";
292   case frontend::ASTPrintXML:            return "-ast-print-xml";
293   case frontend::ASTView:                return "-ast-view";
294   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
295   case frontend::DumpTokens:             return "-dump-tokens";
296   case frontend::EmitAssembly:           return "-S";
297   case frontend::EmitBC:                 return "-emit-llvm-bc";
298   case frontend::EmitHTML:               return "-emit-html";
299   case frontend::EmitLLVM:               return "-emit-llvm";
300   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
301   case frontend::EmitObj:                return "-emit-obj";
302   case frontend::FixIt:                  return "-fixit";
303   case frontend::GeneratePCH:            return "-emit-pch";
304   case frontend::GeneratePTH:            return "-emit-pth";
305   case frontend::InitOnly:               return "-init-only";
306   case frontend::ParseNoop:              return "-parse-noop";
307   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
308   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
309   case frontend::PrintDeclContext:       return "-print-decl-contexts";
310   case frontend::PrintPreprocessedInput: return "-E";
311   case frontend::RewriteMacros:          return "-rewrite-macros";
312   case frontend::RewriteObjC:            return "-rewrite-objc";
313   case frontend::RewriteTest:            return "-rewrite-test";
314   case frontend::RunAnalysis:            return "-analyze";
315   case frontend::RunPreprocessorOnly:    return "-Eonly";
316   }
317 
318   llvm_unreachable("Unexpected language kind!");
319   return 0;
320 }
321 
322 static void FrontendOptsToArgs(const FrontendOptions &Opts,
323                                std::vector<std::string> &Res) {
324   if (!Opts.DebugCodeCompletionPrinter)
325     Res.push_back("-no-code-completion-debug-printer");
326   if (Opts.DisableFree)
327     Res.push_back("-disable-free");
328   if (Opts.RelocatablePCH)
329     Res.push_back("-relocatable-pch");
330   if (Opts.ShowHelp)
331     Res.push_back("-help");
332   if (Opts.ShowMacrosInCodeCompletion)
333     Res.push_back("-code-completion-macros");
334   if (Opts.ShowStats)
335     Res.push_back("-print-stats");
336   if (Opts.ShowTimers)
337     Res.push_back("-ftime-report");
338   if (Opts.ShowVersion)
339     Res.push_back("-version");
340 
341   bool NeedLang = false;
342   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
343     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
344         Opts.Inputs[i].first)
345       NeedLang = true;
346   if (NeedLang) {
347     Res.push_back("-x");
348     Res.push_back(getInputKindName(Opts.Inputs[0].first));
349   }
350   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
351     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
352            "Unable to represent this input vector!");
353     Res.push_back(Opts.Inputs[i].second);
354   }
355 
356   if (!Opts.OutputFile.empty()) {
357     Res.push_back("-o");
358     Res.push_back(Opts.OutputFile);
359   }
360   if (!Opts.ViewClassInheritance.empty()) {
361     Res.push_back("-cxx-inheritance-view");
362     Res.push_back(Opts.ViewClassInheritance);
363   }
364   if (!Opts.CodeCompletionAt.FileName.empty()) {
365     Res.push_back("-code-completion-at");
366     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
367                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
368                   llvm::utostr(Opts.CodeCompletionAt.Column));
369   }
370   if (Opts.ProgramAction != frontend::InheritanceView &&
371       Opts.ProgramAction != frontend::PluginAction)
372     Res.push_back(getActionName(Opts.ProgramAction));
373   if (!Opts.ActionName.empty()) {
374     Res.push_back("-plugin");
375     Res.push_back(Opts.ActionName);
376   }
377   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
378     Res.push_back("-load");
379     Res.push_back(Opts.Plugins[i]);
380   }
381   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
382     Res.push_back("-ast-merge");
383     Res.push_back(Opts.ASTMergeFiles[i]);
384   }
385   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
386     Res.push_back("-mllvm");
387     Res.push_back(Opts.LLVMArgs[i]);
388   }
389 }
390 
391 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
392                                    std::vector<std::string> &Res) {
393   if (Opts.Sysroot != "/") {
394     Res.push_back("-isysroot");
395     Res.push_back(Opts.Sysroot);
396   }
397 
398   /// User specified include entries.
399   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
400     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
401     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
402       llvm::report_fatal_error("Invalid option set!");
403     if (E.IsUserSupplied) {
404       if (E.Group == frontend::After) {
405         Res.push_back("-idirafter");
406       } else if (E.Group == frontend::Quoted) {
407         Res.push_back("-iquote");
408       } else if (E.Group == frontend::System) {
409         Res.push_back("-isystem");
410       } else {
411         assert(E.Group == frontend::Angled && "Invalid group!");
412         Res.push_back(E.IsFramework ? "-F" : "-I");
413       }
414     } else {
415       if (E.Group != frontend::Angled && E.Group != frontend::System)
416         llvm::report_fatal_error("Invalid option set!");
417       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
418                     "-iwithprefix");
419     }
420     Res.push_back(E.Path);
421   }
422 
423   if (!Opts.EnvIncPath.empty()) {
424     // FIXME: Provide an option for this, and move env detection to driver.
425     llvm::report_fatal_error("Not yet implemented!");
426   }
427   if (!Opts.CEnvIncPath.empty()) {
428     // FIXME: Provide an option for this, and move env detection to driver.
429     llvm::report_fatal_error("Not yet implemented!");
430   }
431   if (!Opts.ObjCEnvIncPath.empty()) {
432     // FIXME: Provide an option for this, and move env detection to driver.
433     llvm::report_fatal_error("Not yet implemented!");
434   }
435   if (!Opts.CXXEnvIncPath.empty()) {
436     // FIXME: Provide an option for this, and move env detection to driver.
437     llvm::report_fatal_error("Not yet implemented!");
438   }
439   if (!Opts.ObjCXXEnvIncPath.empty()) {
440     // FIXME: Provide an option for this, and move env detection to driver.
441     llvm::report_fatal_error("Not yet implemented!");
442   }
443   if (!Opts.ResourceDir.empty()) {
444     Res.push_back("-resource-dir");
445     Res.push_back(Opts.ResourceDir);
446   }
447   if (!Opts.UseStandardIncludes)
448     Res.push_back("-nostdinc");
449   if (!Opts.UseStandardCXXIncludes)
450     Res.push_back("-nostdinc++");
451   if (Opts.Verbose)
452     Res.push_back("-v");
453 }
454 
455 static void LangOptsToArgs(const LangOptions &Opts,
456                            std::vector<std::string> &Res) {
457   LangOptions DefaultLangOpts;
458 
459   // FIXME: Need to set -std to get all the implicit options.
460 
461   // FIXME: We want to only pass options relative to the defaults, which
462   // requires constructing a target. :(
463   //
464   // It would be better to push the all target specific choices into the driver,
465   // so that everything below that was more uniform.
466 
467   if (Opts.Trigraphs)
468     Res.push_back("-trigraphs");
469   // Implicit based on the input kind:
470   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
471   // Implicit based on the input language standard:
472   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
473   if (Opts.DollarIdents)
474     Res.push_back("-fdollars-in-identifiers");
475   if (Opts.GNUMode && !Opts.GNUKeywords)
476     Res.push_back("-fno-gnu-keywords");
477   if (!Opts.GNUMode && Opts.GNUKeywords)
478     Res.push_back("-fgnu-keywords");
479   if (Opts.Microsoft)
480     Res.push_back("-fms-extensions");
481   if (Opts.ObjCNonFragileABI)
482     Res.push_back("-fobjc-nonfragile-abi");
483   if (Opts.ObjCNonFragileABI2)
484     Res.push_back("-fobjc-nonfragile-abi2");
485   // NoInline is implicit.
486   if (!Opts.CXXOperatorNames)
487     Res.push_back("-fno-operator-names");
488   if (Opts.PascalStrings)
489     Res.push_back("-fpascal-strings");
490   if (Opts.CatchUndefined)
491     Res.push_back("-fcatch-undefined-behavior");
492   if (Opts.WritableStrings)
493     Res.push_back("-fwritable-strings");
494   if (Opts.ConstStrings)
495     Res.push_back("-Wwrite-strings");
496   if (!Opts.LaxVectorConversions)
497     Res.push_back("-fno-lax-vector-conversions");
498   if (Opts.AltiVec)
499     Res.push_back("-faltivec");
500   if (Opts.Exceptions)
501     Res.push_back("-fexceptions");
502   if (Opts.SjLjExceptions)
503     Res.push_back("-fsjlj-exceptions");
504   if (!Opts.RTTI)
505     Res.push_back("-fno-rtti");
506   if (!Opts.NeXTRuntime)
507     Res.push_back("-fgnu-runtime");
508   if (Opts.Freestanding)
509     Res.push_back("-ffreestanding");
510   if (Opts.NoBuiltin)
511     Res.push_back("-fno-builtin");
512   if (!Opts.AssumeSaneOperatorNew)
513     Res.push_back("-fno-assume-sane-operator-new");
514   if (!Opts.ThreadsafeStatics)
515     Res.push_back("-fno-threadsafe-statics");
516   if (Opts.POSIXThreads)
517     Res.push_back("-pthread");
518   if (Opts.Blocks)
519     Res.push_back("-fblocks");
520   if (Opts.EmitAllDecls)
521     Res.push_back("-femit-all-decls");
522   if (Opts.MathErrno)
523     Res.push_back("-fmath-errno");
524   if (Opts.OverflowChecking)
525     Res.push_back("-ftrapv");
526   if (Opts.HeinousExtensions)
527     Res.push_back("-fheinous-gnu-extensions");
528   // Optimize is implicit.
529   // OptimizeSize is implicit.
530   if (Opts.Static)
531     Res.push_back("-static-define");
532   if (Opts.DumpRecordLayouts)
533     Res.push_back("-fdump-record-layouts");
534   if (Opts.DumpVTableLayouts)
535     Res.push_back("-fdump-vtable-layouts");
536   if (Opts.NoBitFieldTypeAlign)
537     Res.push_back("-fno-bitfield-type-alignment");
538   if (Opts.SjLjExceptions)
539     Res.push_back("-fsjlj-exceptions");
540   if (Opts.PICLevel) {
541     Res.push_back("-pic-level");
542     Res.push_back(llvm::utostr(Opts.PICLevel));
543   }
544   if (Opts.ObjCGCBitmapPrint)
545     Res.push_back("-print-ivar-layout");
546   if (Opts.NoConstantCFStrings)
547     Res.push_back("-fno-constant-cfstrings");
548   if (!Opts.AccessControl)
549     Res.push_back("-fno-access-control");
550   if (!Opts.CharIsSigned)
551     Res.push_back("-fno-signed-char");
552   if (Opts.ShortWChar)
553     Res.push_back("-fshort-wchar");
554   if (!Opts.ElideConstructors)
555     Res.push_back("-fno-elide-constructors");
556   if (Opts.getGCMode() != LangOptions::NonGC) {
557     if (Opts.getGCMode() == LangOptions::HybridGC) {
558       Res.push_back("-fobjc-gc");
559     } else {
560       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
561       Res.push_back("-fobjc-gc-only");
562     }
563   }
564   if (Opts.getVisibilityMode() != LangOptions::Default) {
565     Res.push_back("-fvisibility");
566     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
567       Res.push_back("hidden");
568     } else {
569       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
570              "Invalid visibility!");
571       Res.push_back("protected");
572     }
573   }
574   if (Opts.getStackProtectorMode() != 0) {
575     Res.push_back("-stack-protector");
576     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
577   }
578   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
579     Res.push_back("-ftemplate-depth");
580     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
581   }
582   if (!Opts.ObjCConstantStringClass.empty()) {
583     Res.push_back("-fconstant-string-class");
584     Res.push_back(Opts.ObjCConstantStringClass);
585   }
586 }
587 
588 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
589                                    std::vector<std::string> &Res) {
590   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
591     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
592                   Opts.Macros[i].first);
593   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
594     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
595     Res.push_back("-include");
596     Res.push_back(Opts.Includes[i]);
597   }
598   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
599     Res.push_back("-imacros");
600     Res.push_back(Opts.MacroIncludes[i]);
601   }
602   if (!Opts.UsePredefines)
603     Res.push_back("-undef");
604   if (Opts.DetailedRecord)
605     Res.push_back("-detailed-preprocessing-record");
606   if (!Opts.ImplicitPCHInclude.empty()) {
607     Res.push_back("-include-pch");
608     Res.push_back(Opts.ImplicitPCHInclude);
609   }
610   if (!Opts.ImplicitPTHInclude.empty()) {
611     Res.push_back("-include-pth");
612     Res.push_back(Opts.ImplicitPTHInclude);
613   }
614   if (!Opts.TokenCache.empty()) {
615     if (Opts.ImplicitPTHInclude.empty()) {
616       Res.push_back("-token-cache");
617       Res.push_back(Opts.TokenCache);
618     } else
619       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
620              "Unsupported option combination!");
621   }
622   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
623     Res.push_back("-remap-file");
624     Res.push_back(Opts.RemappedFiles[i].first + ";" +
625                   Opts.RemappedFiles[i].second);
626   }
627 }
628 
629 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
630                                          std::vector<std::string> &Res) {
631   if (!Opts.ShowCPP && !Opts.ShowMacros)
632     llvm::report_fatal_error("Invalid option combination!");
633 
634   if (Opts.ShowCPP && Opts.ShowMacros)
635     Res.push_back("-dD");
636   else if (!Opts.ShowCPP && Opts.ShowMacros)
637     Res.push_back("-dM");
638 
639   if (!Opts.ShowLineMarkers)
640     Res.push_back("-P");
641   if (Opts.ShowComments)
642     Res.push_back("-C");
643   if (Opts.ShowMacroComments)
644     Res.push_back("-CC");
645 }
646 
647 static void TargetOptsToArgs(const TargetOptions &Opts,
648                              std::vector<std::string> &Res) {
649   Res.push_back("-triple");
650   Res.push_back(Opts.Triple);
651   if (!Opts.CPU.empty()) {
652     Res.push_back("-target-cpu");
653     Res.push_back(Opts.CPU);
654   }
655   if (!Opts.ABI.empty()) {
656     Res.push_back("-target-abi");
657     Res.push_back(Opts.ABI);
658   }
659   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
660     Res.push_back("-target-feature");
661     Res.push_back(Opts.Features[i]);
662   }
663 }
664 
665 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
666   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
667   CodeGenOptsToArgs(getCodeGenOpts(), Res);
668   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
669   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
670   FrontendOptsToArgs(getFrontendOpts(), Res);
671   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
672   LangOptsToArgs(getLangOpts(), Res);
673   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
674   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
675   TargetOptsToArgs(getTargetOpts(), Res);
676 }
677 
678 //===----------------------------------------------------------------------===//
679 // Deserialization (to args)
680 //===----------------------------------------------------------------------===//
681 
682 using namespace clang::driver;
683 using namespace clang::driver::cc1options;
684 
685 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
686                                        llvm::StringRef Default = "") {
687   if (Arg *A = Args.getLastArg(ID))
688     return A->getValue(Args);
689   return Default;
690 }
691 
692 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
693                               int Default, Diagnostic &Diags) {
694   Arg *A = Args.getLastArg(ID);
695   if (!A)
696     return Default;
697 
698   int Res = Default;
699   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
700     Diags.Report(diag::err_drv_invalid_int_value)
701         << A->getAsString(Args) << A->getValue(Args);
702 
703   return Res;
704 }
705 
706 static std::vector<std::string>
707 getAllArgValues(ArgList &Args, cc1options::ID ID) {
708   llvm::SmallVector<const char *, 16> Values;
709   Args.AddAllArgValues(Values, ID);
710   return std::vector<std::string>(Values.begin(), Values.end());
711 }
712 
713 //
714 
715 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
716                               Diagnostic &Diags) {
717   using namespace cc1options;
718 
719   Opts.AnalysisList.clear();
720 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
721   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
722 #include "clang/Frontend/Analyses.def"
723 
724   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
725     llvm::StringRef Name = A->getValue(Args);
726     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
727 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
728       .Case(CMDFLAG, NAME##Model)
729 #include "clang/Frontend/Analyses.def"
730       .Default(NumStores);
731     // FIXME: Error handling.
732     if (Value == NumStores)
733       Diags.Report(diag::err_drv_invalid_value)
734         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
735     else
736       Opts.AnalysisStoreOpt = Value;
737   }
738 
739   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
740     llvm::StringRef Name = A->getValue(Args);
741     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
742 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
743       .Case(CMDFLAG, NAME##Model)
744 #include "clang/Frontend/Analyses.def"
745       .Default(NumConstraints);
746     // FIXME: Error handling.
747     if (Value == NumConstraints)
748       Diags.Report(diag::err_drv_invalid_value)
749         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
750     else
751       Opts.AnalysisConstraintsOpt = Value;
752   }
753 
754   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
755     llvm::StringRef Name = A->getValue(Args);
756     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
757 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
758       .Case(CMDFLAG, PD_##NAME)
759 #include "clang/Frontend/Analyses.def"
760       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
761     // FIXME: Error handling.
762     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
763       Diags.Report(diag::err_drv_invalid_value)
764         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
765     else
766       Opts.AnalysisDiagOpt = Value;
767   }
768 
769   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
770   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
771   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
772   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
773   Opts.AnalyzeNestedBlocks =
774     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
775   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
776   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
777   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
778   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
779   Opts.EnableExperimentalInternalChecks =
780     Args.hasArg(OPT_analyzer_experimental_internal_checks);
781   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
782   Opts.MaxNodes = getLastArgIntValue(Args, OPT_analyzer_max_nodes,150000,Diags);
783 }
784 
785 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
786                              Diagnostic &Diags) {
787   using namespace cc1options;
788   // -Os implies -O2
789   if (Args.hasArg(OPT_Os))
790     Opts.OptimizationLevel = 2;
791   else {
792     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
793     if (Opts.OptimizationLevel > 3) {
794       Diags.Report(diag::err_drv_invalid_value)
795         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
796       Opts.OptimizationLevel = 3;
797     }
798   }
799 
800   // We must always run at least the always inlining pass.
801   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
802     : CodeGenOptions::OnlyAlwaysInlining;
803 
804   Opts.DebugInfo = Args.hasArg(OPT_g);
805   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
806   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
807   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
808   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
809   Opts.NoCommon = Args.hasArg(OPT_fno_common);
810   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
811   Opts.OptimizeSize = Args.hasArg(OPT_Os);
812   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
813 
814   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
815   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
816   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
817   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
818   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
819   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
820   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
821   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
822   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
823   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
824   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
825   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
826   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
827 
828   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
829   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
830 
831   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
832   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
833 }
834 
835 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
836                                       ArgList &Args) {
837   using namespace cc1options;
838   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
839   Opts.Targets = getAllArgValues(Args, OPT_MT);
840   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
841   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
842 }
843 
844 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
845                                 Diagnostic &Diags) {
846   using namespace cc1options;
847   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
848   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
849   Opts.Pedantic = Args.hasArg(OPT_pedantic);
850   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
851   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
852   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
853   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
854   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
855   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
856   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
857   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
858   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
859   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
860   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
861   Opts.TemplateBacktraceLimit
862     = getLastArgIntValue(Args, OPT_ftemplate_backtrace_limit, 0, Diags);
863   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
864                                     DiagnosticOptions::DefaultTabStop, Diags);
865   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
866     Diags.Report(diag::warn_ignoring_ftabstop_value)
867       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
868     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
869   }
870   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
871   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
872   Opts.Warnings = getAllArgValues(Args, OPT_W);
873 }
874 
875 static FrontendOptions::InputKind
876 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
877   using namespace cc1options;
878   Opts.ProgramAction = frontend::ParseSyntaxOnly;
879   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
880     switch (A->getOption().getID()) {
881     default:
882       assert(0 && "Invalid option in group!");
883     case OPT_ast_dump:
884       Opts.ProgramAction = frontend::ASTDump; break;
885     case OPT_ast_print:
886       Opts.ProgramAction = frontend::ASTPrint; break;
887     case OPT_ast_print_xml:
888       Opts.ProgramAction = frontend::ASTPrintXML; break;
889     case OPT_ast_view:
890       Opts.ProgramAction = frontend::ASTView; break;
891     case OPT_dump_raw_tokens:
892       Opts.ProgramAction = frontend::DumpRawTokens; break;
893     case OPT_dump_tokens:
894       Opts.ProgramAction = frontend::DumpTokens; break;
895     case OPT_S:
896       Opts.ProgramAction = frontend::EmitAssembly; break;
897     case OPT_emit_llvm_bc:
898       Opts.ProgramAction = frontend::EmitBC; break;
899     case OPT_emit_html:
900       Opts.ProgramAction = frontend::EmitHTML; break;
901     case OPT_emit_llvm:
902       Opts.ProgramAction = frontend::EmitLLVM; break;
903     case OPT_emit_llvm_only:
904       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
905     case OPT_emit_obj:
906       Opts.ProgramAction = frontend::EmitObj; break;
907     case OPT_fixit_EQ:
908       Opts.FixItSuffix = A->getValue(Args);
909       // fall-through!
910     case OPT_fixit:
911       Opts.ProgramAction = frontend::FixIt; break;
912     case OPT_emit_pch:
913       Opts.ProgramAction = frontend::GeneratePCH; break;
914     case OPT_emit_pth:
915       Opts.ProgramAction = frontend::GeneratePTH; break;
916     case OPT_init_only:
917       Opts.ProgramAction = frontend::InitOnly; break;
918     case OPT_parse_noop:
919       Opts.ProgramAction = frontend::ParseNoop; break;
920     case OPT_parse_print_callbacks:
921       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
922     case OPT_fsyntax_only:
923       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
924     case OPT_print_decl_contexts:
925       Opts.ProgramAction = frontend::PrintDeclContext; break;
926     case OPT_E:
927       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
928     case OPT_rewrite_macros:
929       Opts.ProgramAction = frontend::RewriteMacros; break;
930     case OPT_rewrite_objc:
931       Opts.ProgramAction = frontend::RewriteObjC; break;
932     case OPT_rewrite_test:
933       Opts.ProgramAction = frontend::RewriteTest; break;
934     case OPT_analyze:
935       Opts.ProgramAction = frontend::RunAnalysis; break;
936     case OPT_Eonly:
937       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
938     }
939   }
940   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
941     Opts.ProgramAction = frontend::PluginAction;
942     Opts.ActionName = A->getValue(Args);
943   }
944 
945   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
946     Opts.CodeCompletionAt =
947       ParsedSourceLocation::FromString(A->getValue(Args));
948     if (Opts.CodeCompletionAt.FileName.empty())
949       Diags.Report(diag::err_drv_invalid_value)
950         << A->getAsString(Args) << A->getValue(Args);
951   }
952   Opts.DebugCodeCompletionPrinter =
953     !Args.hasArg(OPT_no_code_completion_debug_printer);
954   Opts.DisableFree = Args.hasArg(OPT_disable_free);
955 
956   Opts.OutputFile = getLastArgValue(Args, OPT_o);
957   Opts.Plugins = getAllArgValues(Args, OPT_load);
958   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
959   Opts.ShowHelp = Args.hasArg(OPT_help);
960   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
961   Opts.ShowStats = Args.hasArg(OPT_print_stats);
962   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
963   Opts.ShowVersion = Args.hasArg(OPT_version);
964   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
965   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
966   Opts.LLVMArgs = getAllArgValues(Args, OPT_mllvm);
967 
968   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
969   if (const Arg *A = Args.getLastArg(OPT_x)) {
970     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
971       .Case("c", FrontendOptions::IK_C)
972       .Case("cl", FrontendOptions::IK_OpenCL)
973       .Case("c", FrontendOptions::IK_C)
974       .Case("cl", FrontendOptions::IK_OpenCL)
975       .Case("c++", FrontendOptions::IK_CXX)
976       .Case("objective-c", FrontendOptions::IK_ObjC)
977       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
978       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
979       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
980       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
981       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
982       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
983       .Case("c-header", FrontendOptions::IK_C)
984       .Case("objective-c-header", FrontendOptions::IK_ObjC)
985       .Case("c++-header", FrontendOptions::IK_CXX)
986       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
987       .Case("ast", FrontendOptions::IK_AST)
988       .Default(FrontendOptions::IK_None);
989     if (DashX == FrontendOptions::IK_None)
990       Diags.Report(diag::err_drv_invalid_value)
991         << A->getAsString(Args) << A->getValue(Args);
992   }
993 
994   // '-' is the default input if none is given.
995   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
996   Opts.Inputs.clear();
997   if (Inputs.empty())
998     Inputs.push_back("-");
999   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1000     FrontendOptions::InputKind IK = DashX;
1001     if (IK == FrontendOptions::IK_None) {
1002       IK = FrontendOptions::getInputKindForExtension(
1003         llvm::StringRef(Inputs[i]).rsplit('.').second);
1004       // FIXME: Remove this hack.
1005       if (i == 0)
1006         DashX = IK;
1007     }
1008     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1009   }
1010 
1011   return DashX;
1012 }
1013 
1014 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1015                                                  void *MainAddr) {
1016   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1017 
1018   if (!P.isEmpty()) {
1019     P.eraseComponent();  // Remove /clang from foo/bin/clang
1020     P.eraseComponent();  // Remove /bin   from foo/bin
1021 
1022     // Get foo/lib/clang/<version>/include
1023     P.appendComponent("lib");
1024     P.appendComponent("clang");
1025     P.appendComponent(CLANG_VERSION_STRING);
1026   }
1027 
1028   return P.str();
1029 }
1030 
1031 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1032   using namespace cc1options;
1033   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1034   Opts.Verbose = Args.hasArg(OPT_v);
1035   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1036   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1037   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1038   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1039 
1040   // Add -I... and -F... options in order.
1041   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1042          ie = Args.filtered_end(); it != ie; ++it)
1043     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1044                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1045 
1046   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1047   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1048   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1049                                              OPT_iwithprefixbefore),
1050          ie = Args.filtered_end(); it != ie; ++it) {
1051     if (it->getOption().matches(OPT_iprefix))
1052       Prefix = it->getValue(Args);
1053     else if (it->getOption().matches(OPT_iwithprefix))
1054       Opts.AddPath(Prefix.str() + it->getValue(Args),
1055                    frontend::System, false, false);
1056     else
1057       Opts.AddPath(Prefix.str() + it->getValue(Args),
1058                    frontend::Angled, false, false);
1059   }
1060 
1061   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1062          ie = Args.filtered_end(); it != ie; ++it)
1063     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1064   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1065          ie = Args.filtered_end(); it != ie; ++it)
1066     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1067   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1068          ie = Args.filtered_end(); it != ie; ++it)
1069     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1070 
1071   // FIXME: Need options for the various environment variables!
1072 }
1073 
1074 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1075                           FrontendOptions::InputKind IK,
1076                           Diagnostic &Diags) {
1077   // FIXME: Cleanup per-file based stuff.
1078 
1079   // Set some properties which depend soley on the input kind; it would be nice
1080   // to move these to the language standard, and have the driver resolve the
1081   // input kind + language standard.
1082   if (IK == FrontendOptions::IK_Asm) {
1083     Opts.AsmPreprocessor = 1;
1084   } else if (IK == FrontendOptions::IK_ObjC ||
1085              IK == FrontendOptions::IK_ObjCXX ||
1086              IK == FrontendOptions::IK_PreprocessedObjC ||
1087              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1088     Opts.ObjC1 = Opts.ObjC2 = 1;
1089   }
1090 
1091   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1092   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1093     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1094 #define LANGSTANDARD(id, name, desc, features) \
1095       .Case(name, LangStandard::lang_##id)
1096 #include "clang/Frontend/LangStandards.def"
1097       .Default(LangStandard::lang_unspecified);
1098     if (LangStd == LangStandard::lang_unspecified)
1099       Diags.Report(diag::err_drv_invalid_value)
1100         << A->getAsString(Args) << A->getValue(Args);
1101   }
1102 
1103   if (LangStd == LangStandard::lang_unspecified) {
1104     // Based on the base language, pick one.
1105     switch (IK) {
1106     case FrontendOptions::IK_None:
1107     case FrontendOptions::IK_AST:
1108       assert(0 && "Invalid input kind!");
1109     case FrontendOptions::IK_OpenCL:
1110       LangStd = LangStandard::lang_opencl;
1111       break;
1112     case FrontendOptions::IK_Asm:
1113     case FrontendOptions::IK_C:
1114     case FrontendOptions::IK_PreprocessedC:
1115     case FrontendOptions::IK_ObjC:
1116     case FrontendOptions::IK_PreprocessedObjC:
1117       LangStd = LangStandard::lang_gnu99;
1118       break;
1119     case FrontendOptions::IK_CXX:
1120     case FrontendOptions::IK_PreprocessedCXX:
1121     case FrontendOptions::IK_ObjCXX:
1122     case FrontendOptions::IK_PreprocessedObjCXX:
1123       LangStd = LangStandard::lang_gnucxx98;
1124       break;
1125     }
1126   }
1127 
1128   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1129   Opts.BCPLComment = Std.hasBCPLComments();
1130   Opts.C99 = Std.isC99();
1131   Opts.CPlusPlus = Std.isCPlusPlus();
1132   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1133   Opts.Digraphs = Std.hasDigraphs();
1134   Opts.GNUMode = Std.isGNUMode();
1135   Opts.GNUInline = !Std.isC99();
1136   Opts.HexFloats = Std.hasHexFloats();
1137   Opts.ImplicitInt = Std.hasImplicitInt();
1138 
1139   // OpenCL has some additional defaults.
1140   if (LangStd == LangStandard::lang_opencl) {
1141     Opts.OpenCL = 1;
1142     Opts.AltiVec = 1;
1143     Opts.CXXOperatorNames = 1;
1144     Opts.LaxVectorConversions = 1;
1145   }
1146 
1147   // OpenCL and C++ both have bool, true, false keywords.
1148   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1149 
1150   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1151   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1152   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1153   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1154   // name, as it doesn't seem a useful distinction.
1155   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1156                                   Opts.GNUMode);
1157 
1158   if (Opts.CPlusPlus)
1159     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1160 
1161   if (Args.hasArg(OPT_fobjc_gc_only))
1162     Opts.setGCMode(LangOptions::GCOnly);
1163   else if (Args.hasArg(OPT_fobjc_gc))
1164     Opts.setGCMode(LangOptions::HybridGC);
1165 
1166   if (Args.hasArg(OPT_print_ivar_layout))
1167     Opts.ObjCGCBitmapPrint = 1;
1168   if (Args.hasArg(OPT_fno_constant_cfstrings))
1169     Opts.NoConstantCFStrings = 1;
1170 
1171   if (Args.hasArg(OPT_faltivec))
1172     Opts.AltiVec = 1;
1173 
1174   if (Args.hasArg(OPT_pthread))
1175     Opts.POSIXThreads = 1;
1176 
1177   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1178                                         "default");
1179   if (Vis == "default")
1180     Opts.setVisibilityMode(LangOptions::Default);
1181   else if (Vis == "hidden")
1182     Opts.setVisibilityMode(LangOptions::Hidden);
1183   else if (Vis == "protected")
1184     Opts.setVisibilityMode(LangOptions::Protected);
1185   else
1186     Diags.Report(diag::err_drv_invalid_value)
1187       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1188 
1189   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1190 
1191   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1192   // is specified, or -std is set to a conforming mode.
1193   Opts.Trigraphs = !Opts.GNUMode;
1194   if (Args.hasArg(OPT_trigraphs))
1195     Opts.Trigraphs = 1;
1196 
1197   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1198                                    OPT_fno_dollars_in_identifiers,
1199                                    !Opts.AsmPreprocessor);
1200   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1201   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1202   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1203   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1204   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1205     Opts.LaxVectorConversions = 0;
1206   if (Args.hasArg(OPT_fno_threadsafe_statics))
1207     Opts.ThreadsafeStatics = 0;
1208   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1209   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1210   Opts.Blocks = Args.hasArg(OPT_fblocks);
1211   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1212   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1213   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1214   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1215   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1216   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1217   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1218   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1219   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1220   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1221                                                Diags);
1222   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1223   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1224                                                  OPT_fconstant_string_class);
1225   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1226   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1227   if (Opts.ObjCNonFragileABI2)
1228     Opts.ObjCNonFragileABI = true;
1229   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1230   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1231   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1232   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1233   Opts.Static = Args.hasArg(OPT_static_define);
1234   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1235   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1236   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1237   Opts.OptimizeSize = 0;
1238 
1239   // FIXME: Eliminate this dependency.
1240   unsigned Opt =
1241     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1242   Opts.Optimize = Opt != 0;
1243 
1244   // This is the __NO_INLINE__ define, which just depends on things like the
1245   // optimization level and -fno-inline, not actually whether the backend has
1246   // inlining enabled.
1247   //
1248   // FIXME: This is affected by other options (-fno-inline).
1249   Opts.NoInline = !Opt;
1250 
1251   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1252   switch (SSP) {
1253   default:
1254     Diags.Report(diag::err_drv_invalid_value)
1255       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1256     break;
1257   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1258   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1259   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1260   }
1261 }
1262 
1263 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1264                                   Diagnostic &Diags) {
1265   using namespace cc1options;
1266   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1267   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1268   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1269       Opts.TokenCache = A->getValue(Args);
1270   else
1271     Opts.TokenCache = Opts.ImplicitPTHInclude;
1272   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1273   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1274   // Add macros from the command line.
1275   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1276          ie = Args.filtered_end(); it != ie; ++it) {
1277     if (it->getOption().matches(OPT_D))
1278       Opts.addMacroDef(it->getValue(Args));
1279     else
1280       Opts.addMacroUndef(it->getValue(Args));
1281   }
1282 
1283   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1284 
1285   // Add the ordered list of -includes.
1286   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1287                                              OPT_include_pth),
1288          ie = Args.filtered_end(); it != ie; ++it) {
1289     // PCH is handled specially, we need to extra the original include path.
1290     if (it->getOption().matches(OPT_include_pch)) {
1291       std::string OriginalFile =
1292         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1293       if (OriginalFile.empty())
1294         continue;
1295 
1296       Opts.Includes.push_back(OriginalFile);
1297     } else
1298       Opts.Includes.push_back(it->getValue(Args));
1299   }
1300 
1301   // Include 'altivec.h' if -faltivec option present
1302   if (Args.hasArg(OPT_faltivec))
1303     Opts.Includes.push_back("altivec.h");
1304 
1305   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1306          ie = Args.filtered_end(); it != ie; ++it) {
1307     std::pair<llvm::StringRef,llvm::StringRef> Split =
1308       llvm::StringRef(it->getValue(Args)).split(';');
1309 
1310     if (Split.second.empty()) {
1311       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1312       continue;
1313     }
1314 
1315     Opts.addRemappedFile(Split.first, Split.second);
1316   }
1317 }
1318 
1319 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1320                                         ArgList &Args) {
1321   using namespace cc1options;
1322   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1323   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1324   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1325   Opts.ShowComments = Args.hasArg(OPT_C);
1326   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1327 }
1328 
1329 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1330   using namespace cc1options;
1331   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1332   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1333   Opts.Triple = getLastArgValue(Args, OPT_triple);
1334   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1335 
1336   // Use the host triple if unspecified.
1337   if (Opts.Triple.empty())
1338     Opts.Triple = llvm::sys::getHostTriple();
1339 }
1340 
1341 //
1342 
1343 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1344                                         const char **ArgBegin,
1345                                         const char **ArgEnd,
1346                                         Diagnostic &Diags) {
1347   // Parse the arguments.
1348   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1349   unsigned MissingArgIndex, MissingArgCount;
1350   llvm::OwningPtr<InputArgList> Args(
1351     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1352 
1353   // Check for missing argument error.
1354   if (MissingArgCount)
1355     Diags.Report(diag::err_drv_missing_argument)
1356       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1357 
1358   // Issue errors on unknown arguments.
1359   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1360          ie = Args->filtered_end(); it != ie; ++it)
1361     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1362 
1363   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1364   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1365   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1366   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1367   FrontendOptions::InputKind DashX =
1368     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1369   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1370   if (DashX != FrontendOptions::IK_AST)
1371     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1372   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1373   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1374   ParseTargetArgs(Res.getTargetOpts(), *Args);
1375 }
1376