xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 7d4bc9a1064058a1f4b106ac79552920e602fbd9) 
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.TabStop != DiagnosticOptions::DefaultTabStop) {
244     Res.push_back("-ftabstop");
245     Res.push_back(llvm::utostr(Opts.TabStop));
246   }
247   if (Opts.MessageLength) {
248     Res.push_back("-fmessage-length");
249     Res.push_back(llvm::utostr(Opts.MessageLength));
250   }
251   if (!Opts.DumpBuildInformation.empty()) {
252     Res.push_back("-dump-build-information");
253     Res.push_back(Opts.DumpBuildInformation);
254   }
255   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
256     Res.push_back("-W" + Opts.Warnings[i]);
257 }
258 
259 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
260   switch (Kind) {
261   case FrontendOptions::IK_None:              break;
262   case FrontendOptions::IK_AST:               return "ast";
263   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
264   case FrontendOptions::IK_C:                 return "c";
265   case FrontendOptions::IK_CXX:               return "c++";
266   case FrontendOptions::IK_ObjC:              return "objective-c";
267   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
268   case FrontendOptions::IK_OpenCL:            return "cl";
269   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
270   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
271   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
272   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
273   }
274 
275   llvm_unreachable("Unexpected language kind!");
276   return 0;
277 }
278 
279 static const char *getActionName(frontend::ActionKind Kind) {
280   switch (Kind) {
281   case frontend::PluginAction:
282   case frontend::InheritanceView:
283     llvm_unreachable("Invalid kind!");
284 
285   case frontend::ASTDump:                return "-ast-dump";
286   case frontend::ASTPrint:               return "-ast-print";
287   case frontend::ASTPrintXML:            return "-ast-print-xml";
288   case frontend::ASTView:                return "-ast-view";
289   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
290   case frontend::DumpTokens:             return "-dump-tokens";
291   case frontend::EmitAssembly:           return "-S";
292   case frontend::EmitBC:                 return "-emit-llvm-bc";
293   case frontend::EmitHTML:               return "-emit-html";
294   case frontend::EmitLLVM:               return "-emit-llvm";
295   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
296   case frontend::EmitObj:                return "-emit-obj";
297   case frontend::FixIt:                  return "-fixit";
298   case frontend::GeneratePCH:            return "-emit-pch";
299   case frontend::GeneratePTH:            return "-emit-pth";
300   case frontend::InitOnly:               return "-init-only";
301   case frontend::ParseNoop:              return "-parse-noop";
302   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
303   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
304   case frontend::PrintDeclContext:       return "-print-decl-contexts";
305   case frontend::PrintPreprocessedInput: return "-E";
306   case frontend::RewriteMacros:          return "-rewrite-macros";
307   case frontend::RewriteObjC:            return "-rewrite-objc";
308   case frontend::RewriteTest:            return "-rewrite-test";
309   case frontend::RunAnalysis:            return "-analyze";
310   case frontend::RunPreprocessorOnly:    return "-Eonly";
311   }
312 
313   llvm_unreachable("Unexpected language kind!");
314   return 0;
315 }
316 
317 static void FrontendOptsToArgs(const FrontendOptions &Opts,
318                                std::vector<std::string> &Res) {
319   if (!Opts.DebugCodeCompletionPrinter)
320     Res.push_back("-no-code-completion-debug-printer");
321   if (Opts.DisableFree)
322     Res.push_back("-disable-free");
323   if (Opts.RelocatablePCH)
324     Res.push_back("-relocatable-pch");
325   if (Opts.ShowHelp)
326     Res.push_back("-help");
327   if (Opts.ShowMacrosInCodeCompletion)
328     Res.push_back("-code-completion-macros");
329   if (Opts.ShowStats)
330     Res.push_back("-print-stats");
331   if (Opts.ShowTimers)
332     Res.push_back("-ftime-report");
333   if (Opts.ShowVersion)
334     Res.push_back("-version");
335 
336   bool NeedLang = false;
337   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
338     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
339         Opts.Inputs[i].first)
340       NeedLang = true;
341   if (NeedLang) {
342     Res.push_back("-x");
343     Res.push_back(getInputKindName(Opts.Inputs[0].first));
344   }
345   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
346     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
347            "Unable to represent this input vector!");
348     Res.push_back(Opts.Inputs[i].second);
349   }
350 
351   if (!Opts.OutputFile.empty()) {
352     Res.push_back("-o");
353     Res.push_back(Opts.OutputFile);
354   }
355   if (!Opts.ViewClassInheritance.empty()) {
356     Res.push_back("-cxx-inheritance-view");
357     Res.push_back(Opts.ViewClassInheritance);
358   }
359   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
360     Res.push_back("-fixit-at");
361     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
362                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
363                   llvm::utostr(Opts.FixItLocations[i].Column));
364   }
365   if (!Opts.CodeCompletionAt.FileName.empty()) {
366     Res.push_back("-code-completion-at");
367     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
368                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
369                   llvm::utostr(Opts.CodeCompletionAt.Column));
370   }
371   if (Opts.ProgramAction != frontend::InheritanceView &&
372       Opts.ProgramAction != frontend::PluginAction)
373     Res.push_back(getActionName(Opts.ProgramAction));
374   if (!Opts.ActionName.empty()) {
375     Res.push_back("-plugin");
376     Res.push_back(Opts.ActionName);
377   }
378   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
379     Res.push_back("-load");
380     Res.push_back(Opts.Plugins[i]);
381   }
382   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
383     Res.push_back("-ast-merge");
384     Res.push_back(Opts.ASTMergeFiles[i]);
385   }
386 }
387 
388 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
389                                    std::vector<std::string> &Res) {
390   if (Opts.Sysroot != "/") {
391     Res.push_back("-isysroot");
392     Res.push_back(Opts.Sysroot);
393   }
394 
395   /// User specified include entries.
396   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
397     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
398     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
399       llvm::report_fatal_error("Invalid option set!");
400     if (E.IsUserSupplied) {
401       if (E.Group == frontend::After) {
402         Res.push_back("-idirafter");
403       } else if (E.Group == frontend::Quoted) {
404         Res.push_back("-iquote");
405       } else if (E.Group == frontend::System) {
406         Res.push_back("-isystem");
407       } else {
408         assert(E.Group == frontend::Angled && "Invalid group!");
409         Res.push_back(E.IsFramework ? "-F" : "-I");
410       }
411     } else {
412       if (E.Group != frontend::Angled && E.Group != frontend::System)
413         llvm::report_fatal_error("Invalid option set!");
414       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
415                     "-iwithprefix");
416     }
417     Res.push_back(E.Path);
418   }
419 
420   if (!Opts.EnvIncPath.empty()) {
421     // FIXME: Provide an option for this, and move env detection to driver.
422     llvm::report_fatal_error("Not yet implemented!");
423   }
424   if (!Opts.CEnvIncPath.empty()) {
425     // FIXME: Provide an option for this, and move env detection to driver.
426     llvm::report_fatal_error("Not yet implemented!");
427   }
428   if (!Opts.ObjCEnvIncPath.empty()) {
429     // FIXME: Provide an option for this, and move env detection to driver.
430     llvm::report_fatal_error("Not yet implemented!");
431   }
432   if (!Opts.CXXEnvIncPath.empty()) {
433     // FIXME: Provide an option for this, and move env detection to driver.
434     llvm::report_fatal_error("Not yet implemented!");
435   }
436   if (!Opts.ObjCXXEnvIncPath.empty()) {
437     // FIXME: Provide an option for this, and move env detection to driver.
438     llvm::report_fatal_error("Not yet implemented!");
439   }
440   if (!Opts.ResourceDir.empty()) {
441     Res.push_back("-resource-dir");
442     Res.push_back(Opts.ResourceDir);
443   }
444   if (!Opts.UseStandardIncludes)
445     Res.push_back("-nostdinc");
446   if (!Opts.UseStandardCXXIncludes)
447     Res.push_back("-nostdinc++");
448   if (Opts.Verbose)
449     Res.push_back("-v");
450 }
451 
452 static void LangOptsToArgs(const LangOptions &Opts,
453                            std::vector<std::string> &Res) {
454   LangOptions DefaultLangOpts;
455 
456   // FIXME: Need to set -std to get all the implicit options.
457 
458   // FIXME: We want to only pass options relative to the defaults, which
459   // requires constructing a target. :(
460   //
461   // It would be better to push the all target specific choices into the driver,
462   // so that everything below that was more uniform.
463 
464   if (Opts.Trigraphs)
465     Res.push_back("-trigraphs");
466   // Implicit based on the input kind:
467   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
468   // Implicit based on the input language standard:
469   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
470   if (Opts.DollarIdents)
471     Res.push_back("-fdollars-in-identifiers");
472   if (Opts.Microsoft)
473     Res.push_back("-fms-extensions");
474   if (Opts.ObjCNonFragileABI)
475     Res.push_back("-fobjc-nonfragile-abi");
476   if (Opts.ObjCNonFragileABI2)
477     Res.push_back("-fobjc-nonfragile-abi2");
478   // NoInline is implicit.
479   if (!Opts.CXXOperatorNames)
480     Res.push_back("-fno-operator-names");
481   if (Opts.PascalStrings)
482     Res.push_back("-fpascal-strings");
483   if (Opts.CatchUndefined)
484     Res.push_back("-fcatch-undefined-behavior");
485   if (Opts.WritableStrings)
486     Res.push_back("-fwritable-strings");
487   if (Opts.ConstStrings)
488     Res.push_back("-Wwrite-strings");
489   if (!Opts.LaxVectorConversions)
490     Res.push_back("-fno-lax-vector-conversions");
491   if (Opts.AltiVec)
492     Res.push_back("-faltivec");
493   if (Opts.Exceptions)
494     Res.push_back("-fexceptions");
495   if (Opts.SjLjExceptions)
496     Res.push_back("-fsjlj-exceptions");
497   if (!Opts.RTTI)
498     Res.push_back("-fno-rtti");
499   if (!Opts.NeXTRuntime)
500     Res.push_back("-fgnu-runtime");
501   if (Opts.Freestanding)
502     Res.push_back("-ffreestanding");
503   if (Opts.NoBuiltin)
504     Res.push_back("-fno-builtin");
505   if (!Opts.AssumeSaneOperatorNew)
506     Res.push_back("-fno-assume-sane-operator-new");
507   if (!Opts.ThreadsafeStatics)
508     Res.push_back("-fno-threadsafe-statics");
509   if (Opts.POSIXThreads)
510     Res.push_back("-pthread");
511   if (Opts.Blocks)
512     Res.push_back("-fblocks");
513   if (Opts.EmitAllDecls)
514     Res.push_back("-femit-all-decls");
515   if (Opts.MathErrno)
516     Res.push_back("-fmath-errno");
517   if (Opts.OverflowChecking)
518     Res.push_back("-ftrapv");
519   if (Opts.HeinousExtensions)
520     Res.push_back("-fheinous-gnu-extensions");
521   // Optimize is implicit.
522   // OptimizeSize is implicit.
523   if (Opts.Static)
524     Res.push_back("-static-define");
525   if (Opts.PICLevel) {
526     Res.push_back("-pic-level");
527     Res.push_back(llvm::utostr(Opts.PICLevel));
528   }
529   if (Opts.ObjCGCBitmapPrint)
530     Res.push_back("-print-ivar-layout");
531   if (!Opts.AccessControl)
532     Res.push_back("-fno-access-control");
533   if (!Opts.CharIsSigned)
534     Res.push_back("-fno-signed-char");
535   if (Opts.ShortWChar)
536     Res.push_back("-fshort-wchar");
537   if (!Opts.ElideConstructors)
538     Res.push_back("-fno-elide-constructors");
539   if (Opts.getGCMode() != LangOptions::NonGC) {
540     if (Opts.getGCMode() == LangOptions::HybridGC) {
541       Res.push_back("-fobjc-gc");
542     } else {
543       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
544       Res.push_back("-fobjc-gc-only");
545     }
546   }
547   if (Opts.getVisibilityMode() != LangOptions::Default) {
548     Res.push_back("-fvisibility");
549     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
550       Res.push_back("hidden");
551     } else {
552       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
553              "Invalid visibility!");
554       Res.push_back("protected");
555     }
556   }
557   if (Opts.getStackProtectorMode() != 0) {
558     Res.push_back("-stack-protector");
559     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
560   }
561   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
562     Res.push_back("-ftemplate-depth");
563     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
564   }
565   if (!Opts.ObjCConstantStringClass.empty()) {
566     Res.push_back("-fconstant-string-class");
567     Res.push_back(Opts.ObjCConstantStringClass);
568   }
569 }
570 
571 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
572                                    std::vector<std::string> &Res) {
573   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
574     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
575                   Opts.Macros[i].first);
576   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
577     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
578     Res.push_back("-include");
579     Res.push_back(Opts.Includes[i]);
580   }
581   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
582     Res.push_back("-imacros");
583     Res.push_back(Opts.MacroIncludes[i]);
584   }
585   if (!Opts.UsePredefines)
586     Res.push_back("-undef");
587   if (Opts.DetailedRecord)
588     Res.push_back("-detailed-preprocessing-record");
589   if (!Opts.ImplicitPCHInclude.empty()) {
590     Res.push_back("-include-pch");
591     Res.push_back(Opts.ImplicitPCHInclude);
592   }
593   if (!Opts.ImplicitPTHInclude.empty()) {
594     Res.push_back("-include-pth");
595     Res.push_back(Opts.ImplicitPTHInclude);
596   }
597   if (!Opts.TokenCache.empty()) {
598     if (Opts.ImplicitPTHInclude.empty()) {
599       Res.push_back("-token-cache");
600       Res.push_back(Opts.TokenCache);
601     } else
602       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
603              "Unsupported option combination!");
604   }
605   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
606     Res.push_back("-remap-file");
607     Res.push_back(Opts.RemappedFiles[i].first + ";" +
608                   Opts.RemappedFiles[i].second);
609   }
610 }
611 
612 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
613                                          std::vector<std::string> &Res) {
614   if (!Opts.ShowCPP && !Opts.ShowMacros)
615     llvm::report_fatal_error("Invalid option combination!");
616 
617   if (Opts.ShowCPP && Opts.ShowMacros)
618     Res.push_back("-dD");
619   else if (!Opts.ShowCPP && Opts.ShowMacros)
620     Res.push_back("-dM");
621 
622   if (!Opts.ShowLineMarkers)
623     Res.push_back("-P");
624   if (Opts.ShowComments)
625     Res.push_back("-C");
626   if (Opts.ShowMacroComments)
627     Res.push_back("-CC");
628 }
629 
630 static void TargetOptsToArgs(const TargetOptions &Opts,
631                              std::vector<std::string> &Res) {
632   Res.push_back("-triple");
633   Res.push_back(Opts.Triple);
634   if (!Opts.CPU.empty()) {
635     Res.push_back("-target-cpu");
636     Res.push_back(Opts.CPU);
637   }
638   if (!Opts.ABI.empty()) {
639     Res.push_back("-target-abi");
640     Res.push_back(Opts.ABI);
641   }
642   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
643     Res.push_back("-target-feature");
644     Res.push_back(Opts.Features[i]);
645   }
646 }
647 
648 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
649   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
650   CodeGenOptsToArgs(getCodeGenOpts(), Res);
651   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
652   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
653   FrontendOptsToArgs(getFrontendOpts(), Res);
654   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
655   LangOptsToArgs(getLangOpts(), Res);
656   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
657   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
658   TargetOptsToArgs(getTargetOpts(), Res);
659 }
660 
661 //===----------------------------------------------------------------------===//
662 // Deserialization (to args)
663 //===----------------------------------------------------------------------===//
664 
665 using namespace clang::driver;
666 using namespace clang::driver::cc1options;
667 
668 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
669                                        llvm::StringRef Default = "") {
670   if (Arg *A = Args.getLastArg(ID))
671     return A->getValue(Args);
672   return Default;
673 }
674 
675 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
676                               int Default, Diagnostic &Diags) {
677   Arg *A = Args.getLastArg(ID);
678   if (!A)
679     return Default;
680 
681   int Res = Default;
682   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
683     Diags.Report(diag::err_drv_invalid_int_value)
684         << A->getAsString(Args) << A->getValue(Args);
685 
686   return Res;
687 }
688 
689 static std::vector<std::string>
690 getAllArgValues(ArgList &Args, cc1options::ID ID) {
691   llvm::SmallVector<const char *, 16> Values;
692   Args.AddAllArgValues(Values, ID);
693   return std::vector<std::string>(Values.begin(), Values.end());
694 }
695 
696 //
697 
698 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
699                               Diagnostic &Diags) {
700   using namespace cc1options;
701 
702   Opts.AnalysisList.clear();
703 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
704   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
705 #include "clang/Frontend/Analyses.def"
706 
707   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
708     llvm::StringRef Name = A->getValue(Args);
709     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
710 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
711       .Case(CMDFLAG, NAME##Model)
712 #include "clang/Frontend/Analyses.def"
713       .Default(NumStores);
714     // FIXME: Error handling.
715     if (Value == NumStores)
716       Diags.Report(diag::err_drv_invalid_value)
717         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
718     else
719       Opts.AnalysisStoreOpt = Value;
720   }
721 
722   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
723     llvm::StringRef Name = A->getValue(Args);
724     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
725 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
726       .Case(CMDFLAG, NAME##Model)
727 #include "clang/Frontend/Analyses.def"
728       .Default(NumConstraints);
729     // FIXME: Error handling.
730     if (Value == NumConstraints)
731       Diags.Report(diag::err_drv_invalid_value)
732         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
733     else
734       Opts.AnalysisConstraintsOpt = Value;
735   }
736 
737   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
738     llvm::StringRef Name = A->getValue(Args);
739     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
740 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
741       .Case(CMDFLAG, PD_##NAME)
742 #include "clang/Frontend/Analyses.def"
743       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
744     // FIXME: Error handling.
745     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
746       Diags.Report(diag::err_drv_invalid_value)
747         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
748     else
749       Opts.AnalysisDiagOpt = Value;
750   }
751 
752   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
753   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
754   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
755   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
756   Opts.AnalyzeNestedBlocks =
757     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
758   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
759   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
760   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
761   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
762   Opts.EnableExperimentalInternalChecks =
763     Args.hasArg(OPT_analyzer_experimental_internal_checks);
764   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
765   Opts.MaxNodes = getLastArgIntValue(Args, OPT_analyzer_max_nodes,150000,Diags);
766 }
767 
768 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
769                              Diagnostic &Diags) {
770   using namespace cc1options;
771   // -Os implies -O2
772   if (Args.hasArg(OPT_Os))
773     Opts.OptimizationLevel = 2;
774   else {
775     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
776     if (Opts.OptimizationLevel > 3) {
777       Diags.Report(diag::err_drv_invalid_value)
778         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
779       Opts.OptimizationLevel = 3;
780     }
781   }
782 
783   // We must always run at least the always inlining pass.
784   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
785     : CodeGenOptions::OnlyAlwaysInlining;
786 
787   Opts.DebugInfo = Args.hasArg(OPT_g);
788   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
789   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
790   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
791   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
792   Opts.NoCommon = Args.hasArg(OPT_fno_common);
793   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
794   Opts.OptimizeSize = Args.hasArg(OPT_Os);
795   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
796 
797   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
798   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
799   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
800   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
801   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
802   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
803   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
804   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
805   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
806   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
807   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
808   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
809   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
810 
811   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
812   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
813 
814   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
815   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
816 }
817 
818 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
819                                       ArgList &Args) {
820   using namespace cc1options;
821   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
822   Opts.Targets = getAllArgValues(Args, OPT_MT);
823   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
824   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
825 }
826 
827 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
828                                 Diagnostic &Diags) {
829   using namespace cc1options;
830   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
831   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
832   Opts.Pedantic = Args.hasArg(OPT_pedantic);
833   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
834   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
835   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
836   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
837   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
838   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
839   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
840   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
841   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
842   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
843   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
844   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
845                                     DiagnosticOptions::DefaultTabStop, Diags);
846   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
847     Diags.Report(diag::warn_ignoring_ftabstop_value)
848       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
849     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
850   }
851   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
852   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
853   Opts.Warnings = getAllArgValues(Args, OPT_W);
854 }
855 
856 static FrontendOptions::InputKind
857 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
858   using namespace cc1options;
859   Opts.ProgramAction = frontend::ParseSyntaxOnly;
860   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
861     switch (A->getOption().getID()) {
862     default:
863       assert(0 && "Invalid option in group!");
864     case OPT_ast_dump:
865       Opts.ProgramAction = frontend::ASTDump; break;
866     case OPT_ast_print:
867       Opts.ProgramAction = frontend::ASTPrint; break;
868     case OPT_ast_print_xml:
869       Opts.ProgramAction = frontend::ASTPrintXML; break;
870     case OPT_ast_view:
871       Opts.ProgramAction = frontend::ASTView; break;
872     case OPT_dump_raw_tokens:
873       Opts.ProgramAction = frontend::DumpRawTokens; break;
874     case OPT_dump_tokens:
875       Opts.ProgramAction = frontend::DumpTokens; break;
876     case OPT_S:
877       Opts.ProgramAction = frontend::EmitAssembly; break;
878     case OPT_emit_llvm_bc:
879       Opts.ProgramAction = frontend::EmitBC; break;
880     case OPT_emit_html:
881       Opts.ProgramAction = frontend::EmitHTML; break;
882     case OPT_emit_llvm:
883       Opts.ProgramAction = frontend::EmitLLVM; break;
884     case OPT_emit_llvm_only:
885       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
886     case OPT_emit_obj:
887       Opts.ProgramAction = frontend::EmitObj; break;
888     case OPT_fixit:
889       Opts.ProgramAction = frontend::FixIt; break;
890     case OPT_emit_pch:
891       Opts.ProgramAction = frontend::GeneratePCH; break;
892     case OPT_emit_pth:
893       Opts.ProgramAction = frontend::GeneratePTH; break;
894     case OPT_init_only:
895       Opts.ProgramAction = frontend::InitOnly; break;
896     case OPT_parse_noop:
897       Opts.ProgramAction = frontend::ParseNoop; break;
898     case OPT_parse_print_callbacks:
899       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
900     case OPT_fsyntax_only:
901       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
902     case OPT_print_decl_contexts:
903       Opts.ProgramAction = frontend::PrintDeclContext; break;
904     case OPT_E:
905       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
906     case OPT_rewrite_macros:
907       Opts.ProgramAction = frontend::RewriteMacros; break;
908     case OPT_rewrite_objc:
909       Opts.ProgramAction = frontend::RewriteObjC; break;
910     case OPT_rewrite_test:
911       Opts.ProgramAction = frontend::RewriteTest; break;
912     case OPT_analyze:
913       Opts.ProgramAction = frontend::RunAnalysis; break;
914     case OPT_Eonly:
915       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
916     }
917   }
918   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
919     Opts.ProgramAction = frontend::PluginAction;
920     Opts.ActionName = A->getValue(Args);
921   }
922 
923   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
924     Opts.CodeCompletionAt =
925       ParsedSourceLocation::FromString(A->getValue(Args));
926     if (Opts.CodeCompletionAt.FileName.empty())
927       Diags.Report(diag::err_drv_invalid_value)
928         << A->getAsString(Args) << A->getValue(Args);
929   }
930   Opts.DebugCodeCompletionPrinter =
931     !Args.hasArg(OPT_no_code_completion_debug_printer);
932   Opts.DisableFree = Args.hasArg(OPT_disable_free);
933 
934   Opts.FixItLocations.clear();
935   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
936          ie = Args.filtered_end(); it != ie; ++it) {
937     const char *Loc = it->getValue(Args);
938     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
939 
940     if (PSL.FileName.empty()) {
941       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
942       continue;
943     }
944 
945     Opts.FixItLocations.push_back(PSL);
946   }
947 
948   Opts.OutputFile = getLastArgValue(Args, OPT_o);
949   Opts.Plugins = getAllArgValues(Args, OPT_load);
950   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
951   Opts.ShowHelp = Args.hasArg(OPT_help);
952   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
953   Opts.ShowStats = Args.hasArg(OPT_print_stats);
954   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
955   Opts.ShowVersion = Args.hasArg(OPT_version);
956   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
957   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
958 
959   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
960   if (const Arg *A = Args.getLastArg(OPT_x)) {
961     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
962       .Case("c", FrontendOptions::IK_C)
963       .Case("cl", FrontendOptions::IK_OpenCL)
964       .Case("c", FrontendOptions::IK_C)
965       .Case("cl", FrontendOptions::IK_OpenCL)
966       .Case("c++", FrontendOptions::IK_CXX)
967       .Case("objective-c", FrontendOptions::IK_ObjC)
968       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
969       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
970       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
971       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
972       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
973       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
974       .Case("c-header", FrontendOptions::IK_C)
975       .Case("objective-c-header", FrontendOptions::IK_ObjC)
976       .Case("c++-header", FrontendOptions::IK_CXX)
977       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
978       .Case("ast", FrontendOptions::IK_AST)
979       .Default(FrontendOptions::IK_None);
980     if (DashX == FrontendOptions::IK_None)
981       Diags.Report(diag::err_drv_invalid_value)
982         << A->getAsString(Args) << A->getValue(Args);
983   }
984 
985   // '-' is the default input if none is given.
986   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
987   Opts.Inputs.clear();
988   if (Inputs.empty())
989     Inputs.push_back("-");
990   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
991     FrontendOptions::InputKind IK = DashX;
992     if (IK == FrontendOptions::IK_None) {
993       IK = FrontendOptions::getInputKindForExtension(
994         llvm::StringRef(Inputs[i]).rsplit('.').second);
995       // FIXME: Remove this hack.
996       if (i == 0)
997         DashX = IK;
998     }
999     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1000   }
1001 
1002   return DashX;
1003 }
1004 
1005 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1006                                                  void *MainAddr) {
1007   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1008 
1009   if (!P.isEmpty()) {
1010     P.eraseComponent();  // Remove /clang from foo/bin/clang
1011     P.eraseComponent();  // Remove /bin   from foo/bin
1012 
1013     // Get foo/lib/clang/<version>/include
1014     P.appendComponent("lib");
1015     P.appendComponent("clang");
1016     P.appendComponent(CLANG_VERSION_STRING);
1017   }
1018 
1019   return P.str();
1020 }
1021 
1022 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1023   using namespace cc1options;
1024   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1025   Opts.Verbose = Args.hasArg(OPT_v);
1026   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1027   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1028   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1029   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1030 
1031   // Add -I... and -F... options in order.
1032   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1033          ie = Args.filtered_end(); it != ie; ++it)
1034     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1035                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1036 
1037   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1038   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1039   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1040                                              OPT_iwithprefixbefore),
1041          ie = Args.filtered_end(); it != ie; ++it) {
1042     if (it->getOption().matches(OPT_iprefix))
1043       Prefix = it->getValue(Args);
1044     else if (it->getOption().matches(OPT_iwithprefix))
1045       Opts.AddPath(Prefix.str() + it->getValue(Args),
1046                    frontend::System, false, false);
1047     else
1048       Opts.AddPath(Prefix.str() + it->getValue(Args),
1049                    frontend::Angled, false, false);
1050   }
1051 
1052   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1053          ie = Args.filtered_end(); it != ie; ++it)
1054     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1055   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1056          ie = Args.filtered_end(); it != ie; ++it)
1057     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1058   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1059          ie = Args.filtered_end(); it != ie; ++it)
1060     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1061 
1062   // FIXME: Need options for the various environment variables!
1063 }
1064 
1065 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1066                           FrontendOptions::InputKind IK,
1067                           Diagnostic &Diags) {
1068   // FIXME: Cleanup per-file based stuff.
1069 
1070   // Set some properties which depend soley on the input kind; it would be nice
1071   // to move these to the language standard, and have the driver resolve the
1072   // input kind + language standard.
1073   if (IK == FrontendOptions::IK_Asm) {
1074     Opts.AsmPreprocessor = 1;
1075   } else if (IK == FrontendOptions::IK_ObjC ||
1076              IK == FrontendOptions::IK_ObjCXX ||
1077              IK == FrontendOptions::IK_PreprocessedObjC ||
1078              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1079     Opts.ObjC1 = Opts.ObjC2 = 1;
1080   }
1081 
1082   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1083   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1084     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1085 #define LANGSTANDARD(id, name, desc, features) \
1086       .Case(name, LangStandard::lang_##id)
1087 #include "clang/Frontend/LangStandards.def"
1088       .Default(LangStandard::lang_unspecified);
1089     if (LangStd == LangStandard::lang_unspecified)
1090       Diags.Report(diag::err_drv_invalid_value)
1091         << A->getAsString(Args) << A->getValue(Args);
1092   }
1093 
1094   if (LangStd == LangStandard::lang_unspecified) {
1095     // Based on the base language, pick one.
1096     switch (IK) {
1097     case FrontendOptions::IK_None:
1098     case FrontendOptions::IK_AST:
1099       assert(0 && "Invalid input kind!");
1100     case FrontendOptions::IK_OpenCL:
1101       LangStd = LangStandard::lang_opencl;
1102       break;
1103     case FrontendOptions::IK_Asm:
1104     case FrontendOptions::IK_C:
1105     case FrontendOptions::IK_PreprocessedC:
1106     case FrontendOptions::IK_ObjC:
1107     case FrontendOptions::IK_PreprocessedObjC:
1108       LangStd = LangStandard::lang_gnu99;
1109       break;
1110     case FrontendOptions::IK_CXX:
1111     case FrontendOptions::IK_PreprocessedCXX:
1112     case FrontendOptions::IK_ObjCXX:
1113     case FrontendOptions::IK_PreprocessedObjCXX:
1114       LangStd = LangStandard::lang_gnucxx98;
1115       break;
1116     }
1117   }
1118 
1119   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1120   Opts.BCPLComment = Std.hasBCPLComments();
1121   Opts.C99 = Std.isC99();
1122   Opts.CPlusPlus = Std.isCPlusPlus();
1123   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1124   Opts.Digraphs = Std.hasDigraphs();
1125   Opts.GNUMode = Std.isGNUMode();
1126   Opts.GNUInline = !Std.isC99();
1127   Opts.HexFloats = Std.hasHexFloats();
1128   Opts.ImplicitInt = Std.hasImplicitInt();
1129 
1130   // OpenCL has some additional defaults.
1131   if (LangStd == LangStandard::lang_opencl) {
1132     Opts.OpenCL = 1;
1133     Opts.AltiVec = 1;
1134     Opts.CXXOperatorNames = 1;
1135     Opts.LaxVectorConversions = 1;
1136   }
1137 
1138   // OpenCL and C++ both have bool, true, false keywords.
1139   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1140 
1141   if (Opts.CPlusPlus)
1142     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1143 
1144   if (Args.hasArg(OPT_fobjc_gc_only))
1145     Opts.setGCMode(LangOptions::GCOnly);
1146   else if (Args.hasArg(OPT_fobjc_gc))
1147     Opts.setGCMode(LangOptions::HybridGC);
1148 
1149   if (Args.hasArg(OPT_print_ivar_layout))
1150     Opts.ObjCGCBitmapPrint = 1;
1151 
1152   if (Args.hasArg(OPT_faltivec))
1153     Opts.AltiVec = 1;
1154 
1155   if (Args.hasArg(OPT_pthread))
1156     Opts.POSIXThreads = 1;
1157 
1158   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1159                                         "default");
1160   if (Vis == "default")
1161     Opts.setVisibilityMode(LangOptions::Default);
1162   else if (Vis == "hidden")
1163     Opts.setVisibilityMode(LangOptions::Hidden);
1164   else if (Vis == "protected")
1165     Opts.setVisibilityMode(LangOptions::Protected);
1166   else
1167     Diags.Report(diag::err_drv_invalid_value)
1168       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1169 
1170   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1171 
1172   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1173   // is specified, or -std is set to a conforming mode.
1174   Opts.Trigraphs = !Opts.GNUMode;
1175   if (Args.hasArg(OPT_trigraphs))
1176     Opts.Trigraphs = 1;
1177 
1178   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1179                                    OPT_fno_dollars_in_identifiers,
1180                                    !Opts.AsmPreprocessor);
1181   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1182   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1183   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1184   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1185   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1186     Opts.LaxVectorConversions = 0;
1187   if (Args.hasArg(OPT_fno_threadsafe_statics))
1188     Opts.ThreadsafeStatics = 0;
1189   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1190   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1191   Opts.Blocks = Args.hasArg(OPT_fblocks);
1192   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1193   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1194   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1195   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1196   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1197   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1198   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1199   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1200   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1201   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1202                                                Diags);
1203   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1204   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1205                                                  OPT_fconstant_string_class);
1206   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1207   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1208   if (Opts.ObjCNonFragileABI2)
1209     Opts.ObjCNonFragileABI = true;
1210   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1211   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1212   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1213   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1214   Opts.Static = Args.hasArg(OPT_static_define);
1215   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1216   Opts.DumpVtableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1217   Opts.OptimizeSize = 0;
1218 
1219   // FIXME: Eliminate this dependency.
1220   unsigned Opt =
1221     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1222   Opts.Optimize = Opt != 0;
1223 
1224   // This is the __NO_INLINE__ define, which just depends on things like the
1225   // optimization level and -fno-inline, not actually whether the backend has
1226   // inlining enabled.
1227   //
1228   // FIXME: This is affected by other options (-fno-inline).
1229   Opts.NoInline = !Opt;
1230 
1231   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1232   switch (SSP) {
1233   default:
1234     Diags.Report(diag::err_drv_invalid_value)
1235       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1236     break;
1237   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1238   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1239   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1240   }
1241 }
1242 
1243 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1244                                   Diagnostic &Diags) {
1245   using namespace cc1options;
1246   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1247   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1248   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1249       Opts.TokenCache = A->getValue(Args);
1250   else
1251     Opts.TokenCache = Opts.ImplicitPTHInclude;
1252   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1253   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1254   // Add macros from the command line.
1255   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1256          ie = Args.filtered_end(); it != ie; ++it) {
1257     if (it->getOption().matches(OPT_D))
1258       Opts.addMacroDef(it->getValue(Args));
1259     else
1260       Opts.addMacroUndef(it->getValue(Args));
1261   }
1262 
1263   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1264 
1265   // Add the ordered list of -includes.
1266   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1267                                              OPT_include_pth),
1268          ie = Args.filtered_end(); it != ie; ++it) {
1269     // PCH is handled specially, we need to extra the original include path.
1270     if (it->getOption().matches(OPT_include_pch)) {
1271       std::string OriginalFile =
1272         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1273       if (OriginalFile.empty())
1274         continue;
1275 
1276       Opts.Includes.push_back(OriginalFile);
1277     } else
1278       Opts.Includes.push_back(it->getValue(Args));
1279   }
1280 
1281   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1282          ie = Args.filtered_end(); it != ie; ++it) {
1283     std::pair<llvm::StringRef,llvm::StringRef> Split =
1284       llvm::StringRef(it->getValue(Args)).split(';');
1285 
1286     if (Split.second.empty()) {
1287       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1288       continue;
1289     }
1290 
1291     Opts.addRemappedFile(Split.first, Split.second);
1292   }
1293 }
1294 
1295 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1296                                         ArgList &Args) {
1297   using namespace cc1options;
1298   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1299   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1300   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1301   Opts.ShowComments = Args.hasArg(OPT_C);
1302   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1303 }
1304 
1305 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1306   using namespace cc1options;
1307   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1308   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1309   Opts.Triple = getLastArgValue(Args, OPT_triple);
1310   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1311 
1312   // Use the host triple if unspecified.
1313   if (Opts.Triple.empty())
1314     Opts.Triple = llvm::sys::getHostTriple();
1315 }
1316 
1317 //
1318 
1319 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1320                                         const char **ArgBegin,
1321                                         const char **ArgEnd,
1322                                         Diagnostic &Diags) {
1323   // Parse the arguments.
1324   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1325   unsigned MissingArgIndex, MissingArgCount;
1326   llvm::OwningPtr<InputArgList> Args(
1327     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1328 
1329   // Check for missing argument error.
1330   if (MissingArgCount)
1331     Diags.Report(diag::err_drv_missing_argument)
1332       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1333 
1334   // Issue errors on unknown arguments.
1335   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1336          ie = Args->filtered_end(); it != ie; ++it)
1337     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1338 
1339   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1340   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1341   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1342   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1343   FrontendOptions::InputKind DashX =
1344     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1345   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1346   if (DashX != FrontendOptions::IK_AST)
1347     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1348   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1349   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1350   ParseTargetArgs(Res.getTargetOpts(), *Args);
1351 }
1352