xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 7f6d60dcc2cea9975c125fe6750ecc39af6a6fb0) 
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.AsmVerbose)
152     Res.push_back("-masm-verbose");
153   if (!Opts.CodeModel.empty()) {
154     Res.push_back("-mcode-model");
155     Res.push_back(Opts.CodeModel);
156   }
157   if (!Opts.DebugPass.empty()) {
158     Res.push_back("-mdebug-pass");
159     Res.push_back(Opts.DebugPass);
160   }
161   if (Opts.DisableFPElim)
162     Res.push_back("-mdisable-fp-elim");
163   if (!Opts.FloatABI.empty()) {
164     Res.push_back("-mfloat-abi");
165     Res.push_back(Opts.FloatABI);
166   }
167   if (!Opts.LimitFloatPrecision.empty()) {
168     Res.push_back("-mlimit-float-precision");
169     Res.push_back(Opts.LimitFloatPrecision);
170   }
171   if (Opts.NoZeroInitializedInBSS)
172     Res.push_back("-mno-zero-initialized-bss");
173   if (Opts.ObjCLegacyDispatch)
174     Res.push_back("-fobjc-legacy-dispatch");
175   if (Opts.SoftFloat)
176     Res.push_back("-msoft-float");
177   if (Opts.UnwindTables)
178     Res.push_back("-munwind-tables");
179   if (Opts.RelocationModel != "pic") {
180     Res.push_back("-mrelocation-model");
181     Res.push_back(Opts.RelocationModel);
182   }
183   if (Opts.CXXCtorDtorAliases)
184     Res.push_back("-mconstructor-aliases");
185   if (!Opts.VerifyModule)
186     Res.push_back("-disable-llvm-verifier");
187 }
188 
189 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
190                                        std::vector<std::string> &Res) {
191   if (Opts.IncludeSystemHeaders)
192     Res.push_back("-sys-header-deps");
193   if (Opts.UsePhonyTargets)
194     Res.push_back("-MP");
195   if (!Opts.OutputFile.empty()) {
196     Res.push_back("-dependency-file");
197     Res.push_back(Opts.OutputFile);
198   }
199   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
200     Res.push_back("-MT");
201     Res.push_back(Opts.Targets[i]);
202   }
203 }
204 
205 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
206                                  std::vector<std::string> &Res) {
207   if (Opts.IgnoreWarnings)
208     Res.push_back("-w");
209   if (Opts.NoRewriteMacros)
210     Res.push_back("-Wno-rewrite-macros");
211   if (Opts.Pedantic)
212     Res.push_back("-pedantic");
213   if (Opts.PedanticErrors)
214     Res.push_back("-pedantic-errors");
215   if (!Opts.ShowColumn)
216     Res.push_back("-fno-show-column");
217   if (!Opts.ShowLocation)
218     Res.push_back("-fno-show-source-location");
219   if (!Opts.ShowCarets)
220     Res.push_back("-fno-caret-diagnostics");
221   if (!Opts.ShowFixits)
222     Res.push_back("-fno-diagnostics-fixit-info");
223   if (Opts.ShowSourceRanges)
224     Res.push_back("-fdiagnostics-print-source-range-info");
225   if (Opts.ShowColors)
226     Res.push_back("-fcolor-diagnostics");
227   if (Opts.VerifyDiagnostics)
228     Res.push_back("-verify");
229   if (Opts.BinaryOutput)
230     Res.push_back("-fdiagnostics-binary");
231   if (Opts.ShowOptionNames)
232     Res.push_back("-fdiagnostics-show-option");
233   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
234     Res.push_back("-ftabstop");
235     Res.push_back(llvm::utostr(Opts.TabStop));
236   }
237   if (Opts.MessageLength) {
238     Res.push_back("-fmessage-length");
239     Res.push_back(llvm::utostr(Opts.MessageLength));
240   }
241   if (!Opts.DumpBuildInformation.empty()) {
242     Res.push_back("-dump-build-information");
243     Res.push_back(Opts.DumpBuildInformation);
244   }
245   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
246     Res.push_back("-W" + Opts.Warnings[i]);
247 }
248 
249 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
250   switch (Kind) {
251   case FrontendOptions::IK_None:              break;
252   case FrontendOptions::IK_AST:               return "ast";
253   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
254   case FrontendOptions::IK_C:                 return "c";
255   case FrontendOptions::IK_CXX:               return "c++";
256   case FrontendOptions::IK_ObjC:              return "objective-c";
257   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
258   case FrontendOptions::IK_OpenCL:            return "cl";
259   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
260   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
261   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
262   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
263   }
264 
265   llvm_unreachable("Unexpected language kind!");
266   return 0;
267 }
268 
269 static const char *getActionName(frontend::ActionKind Kind) {
270   switch (Kind) {
271   case frontend::PluginAction:
272   case frontend::InheritanceView:
273     llvm_unreachable("Invalid kind!");
274 
275   case frontend::ASTDump:                return "-ast-dump";
276   case frontend::ASTPrint:               return "-ast-print";
277   case frontend::ASTPrintXML:            return "-ast-print-xml";
278   case frontend::ASTView:                return "-ast-view";
279   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
280   case frontend::DumpRecordLayouts:      return "-dump-record-layouts";
281   case frontend::DumpTokens:             return "-dump-tokens";
282   case frontend::EmitAssembly:           return "-S";
283   case frontend::EmitBC:                 return "-emit-llvm-bc";
284   case frontend::EmitHTML:               return "-emit-html";
285   case frontend::EmitLLVM:               return "-emit-llvm";
286   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
287   case frontend::EmitObj:                return "-emit-obj";
288   case frontend::FixIt:                  return "-fixit";
289   case frontend::GeneratePCH:            return "-emit-pch";
290   case frontend::GeneratePTH:            return "-emit-pth";
291   case frontend::ParseNoop:              return "-parse-noop";
292   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
293   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
294   case frontend::PrintDeclContext:       return "-print-decl-contexts";
295   case frontend::PrintPreprocessedInput: return "-E";
296   case frontend::RewriteMacros:          return "-rewrite-macros";
297   case frontend::RewriteObjC:            return "-rewrite-objc";
298   case frontend::RewriteTest:            return "-rewrite-test";
299   case frontend::RunAnalysis:            return "-analyze";
300   case frontend::RunPreprocessorOnly:    return "-Eonly";
301   }
302 
303   llvm_unreachable("Unexpected language kind!");
304   return 0;
305 }
306 
307 static void FrontendOptsToArgs(const FrontendOptions &Opts,
308                                std::vector<std::string> &Res) {
309   if (!Opts.DebugCodeCompletionPrinter)
310     Res.push_back("-no-code-completion-debug-printer");
311   if (Opts.DisableFree)
312     Res.push_back("-disable-free");
313   if (Opts.EmptyInputOnly)
314     Res.push_back("-empty-input-only");
315   if (Opts.RelocatablePCH)
316     Res.push_back("-relocatable-pch");
317   if (Opts.ShowHelp)
318     Res.push_back("-help");
319   if (Opts.ShowMacrosInCodeCompletion)
320     Res.push_back("-code-completion-macros");
321   if (Opts.ShowStats)
322     Res.push_back("-print-stats");
323   if (Opts.ShowTimers)
324     Res.push_back("-ftime-report");
325   if (Opts.ShowVersion)
326     Res.push_back("-version");
327 
328   bool NeedLang = false;
329   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
330     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
331         Opts.Inputs[i].first)
332       NeedLang = true;
333   if (NeedLang) {
334     Res.push_back("-x");
335     Res.push_back(getInputKindName(Opts.Inputs[0].first));
336   }
337   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
338     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
339            "Unable to represent this input vector!");
340     Res.push_back(Opts.Inputs[i].second);
341   }
342 
343   if (!Opts.OutputFile.empty()) {
344     Res.push_back("-o");
345     Res.push_back(Opts.OutputFile);
346   }
347   if (!Opts.ViewClassInheritance.empty()) {
348     Res.push_back("-cxx-inheritance-view");
349     Res.push_back(Opts.ViewClassInheritance);
350   }
351   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
352     Res.push_back("-fixit-at");
353     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
354                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
355                   llvm::utostr(Opts.FixItLocations[i].Column));
356   }
357   if (!Opts.CodeCompletionAt.FileName.empty()) {
358     Res.push_back("-code-completion-at");
359     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
360                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
361                   llvm::utostr(Opts.CodeCompletionAt.Column));
362   }
363   if (Opts.ProgramAction != frontend::InheritanceView &&
364       Opts.ProgramAction != frontend::PluginAction)
365     Res.push_back(getActionName(Opts.ProgramAction));
366   if (!Opts.ActionName.empty()) {
367     Res.push_back("-plugin");
368     Res.push_back(Opts.ActionName);
369   }
370   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
371     Res.push_back("-load");
372     Res.push_back(Opts.Plugins[i]);
373   }
374   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
375     Res.push_back("-ast-merge");
376     Res.push_back(Opts.ASTMergeFiles[i]);
377   }
378 }
379 
380 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
381                                    std::vector<std::string> &Res) {
382   if (Opts.Sysroot != "/") {
383     Res.push_back("-isysroot");
384     Res.push_back(Opts.Sysroot);
385   }
386 
387   /// User specified include entries.
388   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
389     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
390     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
391       llvm::llvm_report_error("Invalid option set!");
392     if (E.IsUserSupplied) {
393       if (E.Group == frontend::After) {
394         Res.push_back("-idirafter");
395       } else if (E.Group == frontend::Quoted) {
396         Res.push_back("-iquote");
397       } else if (E.Group == frontend::System) {
398         Res.push_back("-isystem");
399       } else {
400         assert(E.Group == frontend::Angled && "Invalid group!");
401         Res.push_back(E.IsFramework ? "-F" : "-I");
402       }
403     } else {
404       if (E.Group != frontend::Angled && E.Group != frontend::System)
405         llvm::llvm_report_error("Invalid option set!");
406       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
407                     "-iwithprefix");
408     }
409     Res.push_back(E.Path);
410   }
411 
412   if (!Opts.EnvIncPath.empty()) {
413     // FIXME: Provide an option for this, and move env detection to driver.
414     llvm::llvm_report_error("Not yet implemented!");
415   }
416   if (!Opts.CEnvIncPath.empty()) {
417     // FIXME: Provide an option for this, and move env detection to driver.
418     llvm::llvm_report_error("Not yet implemented!");
419   }
420   if (!Opts.ObjCEnvIncPath.empty()) {
421     // FIXME: Provide an option for this, and move env detection to driver.
422     llvm::llvm_report_error("Not yet implemented!");
423   }
424   if (!Opts.CXXEnvIncPath.empty()) {
425     // FIXME: Provide an option for this, and move env detection to driver.
426     llvm::llvm_report_error("Not yet implemented!");
427   }
428   if (!Opts.ObjCXXEnvIncPath.empty()) {
429     // FIXME: Provide an option for this, and move env detection to driver.
430     llvm::llvm_report_error("Not yet implemented!");
431   }
432   if (!Opts.ResourceDir.empty()) {
433     Res.push_back("-resource-dir");
434     Res.push_back(Opts.ResourceDir);
435   }
436   if (!Opts.UseStandardIncludes)
437     Res.push_back("-nostdinc");
438   if (Opts.Verbose)
439     Res.push_back("-v");
440 }
441 
442 static void LangOptsToArgs(const LangOptions &Opts,
443                            std::vector<std::string> &Res) {
444   LangOptions DefaultLangOpts;
445 
446   // FIXME: Need to set -std to get all the implicit options.
447 
448   // FIXME: We want to only pass options relative to the defaults, which
449   // requires constructing a target. :(
450   //
451   // It would be better to push the all target specific choices into the driver,
452   // so that everything below that was more uniform.
453 
454   if (Opts.Trigraphs)
455     Res.push_back("-trigraphs");
456   // Implicit based on the input kind:
457   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
458   // Implicit based on the input language standard:
459   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
460   if (Opts.DollarIdents)
461     Res.push_back("-fdollars-in-identifiers");
462   if (Opts.Microsoft)
463     Res.push_back("-fms-extensions");
464   if (Opts.ObjCNonFragileABI)
465     Res.push_back("-fobjc-nonfragile-abi");
466   if (Opts.ObjCNonFragileABI2)
467     Res.push_back("-fobjc-nonfragile-abi2");
468   // NoInline is implicit.
469   if (!Opts.CXXOperatorNames)
470     Res.push_back("-fno-operator-names");
471   if (Opts.PascalStrings)
472     Res.push_back("-fpascal-strings");
473   if (Opts.CatchUndefined)
474     Res.push_back("-fcatch-undefined-behavior");
475   if (Opts.WritableStrings)
476     Res.push_back("-fwritable-strings");
477   if (Opts.ConstStrings)
478     Res.push_back("-Wwrite-strings");
479   if (!Opts.LaxVectorConversions)
480     Res.push_back("-fno-lax-vector-conversions");
481   if (Opts.AltiVec)
482     Res.push_back("-faltivec");
483   if (Opts.Exceptions)
484     Res.push_back("-fexceptions");
485   if (Opts.SjLjExceptions)
486     Res.push_back("-fsjlj-exceptions");
487   if (!Opts.RTTI)
488     Res.push_back("-fno-rtti");
489   if (!Opts.NeXTRuntime)
490     Res.push_back("-fgnu-runtime");
491   if (Opts.Freestanding)
492     Res.push_back("-ffreestanding");
493   if (Opts.NoBuiltin)
494     Res.push_back("-fno-builtin");
495   if (!Opts.AssumeSaneOperatorNew)
496     Res.push_back("-fno-assume-sane-operator-new");
497   if (!Opts.ThreadsafeStatics)
498     Res.push_back("-fno-threadsafe-statics");
499   if (Opts.POSIXThreads)
500     Res.push_back("-pthread");
501   if (Opts.Blocks)
502     Res.push_back("-fblocks");
503   if (Opts.EmitAllDecls)
504     Res.push_back("-femit-all-decls");
505   if (Opts.MathErrno)
506     Res.push_back("-fmath-errno");
507   if (Opts.OverflowChecking)
508     Res.push_back("-ftrapv");
509   if (Opts.HeinousExtensions)
510     Res.push_back("-fheinous-gnu-extensions");
511   // Optimize is implicit.
512   // OptimizeSize is implicit.
513   if (Opts.Static)
514     Res.push_back("-static-define");
515   if (Opts.PICLevel) {
516     Res.push_back("-pic-level");
517     Res.push_back(llvm::utostr(Opts.PICLevel));
518   }
519   if (Opts.ObjCGCBitmapPrint)
520     Res.push_back("-print-ivar-layout");
521   // FIXME: Don't forget to update when the default changes!
522   if (Opts.AccessControl)
523     Res.push_back("-faccess-control");
524   if (!Opts.CharIsSigned)
525     Res.push_back("-fno-signed-char");
526   if (Opts.ShortWChar)
527     Res.push_back("-fshort-wchar");
528   if (!Opts.ElideConstructors)
529     Res.push_back("-fno-elide-constructors");
530   if (Opts.getGCMode() != LangOptions::NonGC) {
531     if (Opts.getGCMode() == LangOptions::HybridGC) {
532       Res.push_back("-fobjc-gc");
533     } else {
534       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
535       Res.push_back("-fobjc-gc-only");
536     }
537   }
538   if (Opts.getVisibilityMode() != LangOptions::Default) {
539     Res.push_back("-fvisibility");
540     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
541       Res.push_back("hidden");
542     } else {
543       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
544              "Invalid visibility!");
545       Res.push_back("protected");
546     }
547   }
548   if (Opts.getStackProtectorMode() != 0) {
549     Res.push_back("-stack-protector");
550     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
551   }
552   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
553     Res.push_back("-ftemplate-depth");
554     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
555   }
556   if (!Opts.ObjCConstantStringClass.empty()) {
557     Res.push_back("-fconstant-string-class");
558     Res.push_back(Opts.ObjCConstantStringClass);
559   }
560 }
561 
562 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
563                                    std::vector<std::string> &Res) {
564   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
565     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
566                   Opts.Macros[i].first);
567   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
568     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
569     Res.push_back("-include");
570     Res.push_back(Opts.Includes[i]);
571   }
572   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
573     Res.push_back("-imacros");
574     Res.push_back(Opts.MacroIncludes[i]);
575   }
576   if (!Opts.UsePredefines)
577     Res.push_back("-undef");
578   if (Opts.DetailedRecord)
579     Res.push_back("-detailed-preprocessing-record");
580   if (!Opts.ImplicitPCHInclude.empty()) {
581     Res.push_back("-include-pch");
582     Res.push_back(Opts.ImplicitPCHInclude);
583   }
584   if (!Opts.ImplicitPTHInclude.empty()) {
585     Res.push_back("-include-pth");
586     Res.push_back(Opts.ImplicitPTHInclude);
587   }
588   if (!Opts.TokenCache.empty()) {
589     if (Opts.ImplicitPTHInclude.empty()) {
590       Res.push_back("-token-cache");
591       Res.push_back(Opts.TokenCache);
592     } else
593       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
594              "Unsupported option combination!");
595   }
596   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
597     Res.push_back("-remap-file");
598     Res.push_back(Opts.RemappedFiles[i].first + ";" +
599                   Opts.RemappedFiles[i].second);
600   }
601 }
602 
603 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
604                                          std::vector<std::string> &Res) {
605   if (!Opts.ShowCPP && !Opts.ShowMacros)
606     llvm::llvm_report_error("Invalid option combination!");
607 
608   if (Opts.ShowCPP && Opts.ShowMacros)
609     Res.push_back("-dD");
610   else if (!Opts.ShowCPP && Opts.ShowMacros)
611     Res.push_back("-dM");
612 
613   if (!Opts.ShowLineMarkers)
614     Res.push_back("-P");
615   if (Opts.ShowComments)
616     Res.push_back("-C");
617   if (Opts.ShowMacroComments)
618     Res.push_back("-CC");
619 }
620 
621 static void TargetOptsToArgs(const TargetOptions &Opts,
622                              std::vector<std::string> &Res) {
623   Res.push_back("-triple");
624   Res.push_back(Opts.Triple);
625   if (!Opts.CPU.empty()) {
626     Res.push_back("-target-cpu");
627     Res.push_back(Opts.CPU);
628   }
629   if (!Opts.ABI.empty()) {
630     Res.push_back("-target-abi");
631     Res.push_back(Opts.ABI);
632   }
633   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
634     Res.push_back("-target-feature");
635     Res.push_back(Opts.Features[i]);
636   }
637 }
638 
639 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
640   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
641   CodeGenOptsToArgs(getCodeGenOpts(), Res);
642   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
643   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
644   FrontendOptsToArgs(getFrontendOpts(), Res);
645   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
646   LangOptsToArgs(getLangOpts(), Res);
647   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
648   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
649   TargetOptsToArgs(getTargetOpts(), Res);
650 }
651 
652 //===----------------------------------------------------------------------===//
653 // Deserialization (to args)
654 //===----------------------------------------------------------------------===//
655 
656 using namespace clang::driver;
657 using namespace clang::driver::cc1options;
658 
659 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
660                                        llvm::StringRef Default = "") {
661   if (Arg *A = Args.getLastArg(ID))
662     return A->getValue(Args);
663   return Default;
664 }
665 
666 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
667                               int Default, Diagnostic &Diags) {
668   Arg *A = Args.getLastArg(ID);
669   if (!A)
670     return Default;
671 
672   int Res = Default;
673   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
674     Diags.Report(diag::err_drv_invalid_int_value)
675         << A->getAsString(Args) << A->getValue(Args);
676 
677   return Res;
678 }
679 
680 static std::vector<std::string>
681 getAllArgValues(ArgList &Args, cc1options::ID ID) {
682   llvm::SmallVector<const char *, 16> Values;
683   Args.AddAllArgValues(Values, ID);
684   return std::vector<std::string>(Values.begin(), Values.end());
685 }
686 
687 //
688 
689 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
690                               Diagnostic &Diags) {
691   using namespace cc1options;
692 
693   Opts.AnalysisList.clear();
694 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
695   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
696 #include "clang/Frontend/Analyses.def"
697 
698   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
699     llvm::StringRef Name = A->getValue(Args);
700     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
701 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
702       .Case(CMDFLAG, NAME##Model)
703 #include "clang/Frontend/Analyses.def"
704       .Default(NumStores);
705     // FIXME: Error handling.
706     if (Value == NumStores)
707       Diags.Report(diag::err_drv_invalid_value)
708         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
709     else
710       Opts.AnalysisStoreOpt = Value;
711   }
712 
713   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
714     llvm::StringRef Name = A->getValue(Args);
715     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
716 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
717       .Case(CMDFLAG, NAME##Model)
718 #include "clang/Frontend/Analyses.def"
719       .Default(NumConstraints);
720     // FIXME: Error handling.
721     if (Value == NumConstraints)
722       Diags.Report(diag::err_drv_invalid_value)
723         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
724     else
725       Opts.AnalysisConstraintsOpt = Value;
726   }
727 
728   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
729     llvm::StringRef Name = A->getValue(Args);
730     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
731 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
732       .Case(CMDFLAG, PD_##NAME)
733 #include "clang/Frontend/Analyses.def"
734       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
735     // FIXME: Error handling.
736     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
737       Diags.Report(diag::err_drv_invalid_value)
738         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
739     else
740       Opts.AnalysisDiagOpt = Value;
741   }
742 
743   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
744   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
745   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
746   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
747   Opts.AnalyzeNestedBlocks =
748     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
749   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
750   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
751   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
752   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
753   Opts.EnableExperimentalInternalChecks =
754     Args.hasArg(OPT_analyzer_experimental_internal_checks);
755   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
756 }
757 
758 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
759                              Diagnostic &Diags) {
760   using namespace cc1options;
761   // -Os implies -O2
762   if (Args.hasArg(OPT_Os))
763     Opts.OptimizationLevel = 2;
764   else {
765     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
766     if (Opts.OptimizationLevel > 3) {
767       Diags.Report(diag::err_drv_invalid_value)
768         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
769       Opts.OptimizationLevel = 3;
770     }
771   }
772 
773   // We must always run at least the always inlining pass.
774   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
775     : CodeGenOptions::OnlyAlwaysInlining;
776 
777   Opts.DebugInfo = Args.hasArg(OPT_g);
778   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
779   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
780   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
781   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
782   Opts.NoCommon = Args.hasArg(OPT_fno_common);
783   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
784   Opts.OptimizeSize = Args.hasArg(OPT_Os);
785   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
786 
787   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
788   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
789   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
790   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
791   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
792   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
793   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
794   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
795   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
796   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
797   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
798   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
799 
800   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
801   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
802 }
803 
804 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
805                                       ArgList &Args) {
806   using namespace cc1options;
807   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
808   Opts.Targets = getAllArgValues(Args, OPT_MT);
809   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
810   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
811 }
812 
813 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
814                                 Diagnostic &Diags) {
815   using namespace cc1options;
816   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
817   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
818   Opts.Pedantic = Args.hasArg(OPT_pedantic);
819   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
820   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
821   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
822   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
823   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
824   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
825   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
826   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
827   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
828   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
829   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
830                                     DiagnosticOptions::DefaultTabStop, Diags);
831   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
832     Diags.Report(diag::warn_ignoring_ftabstop_value)
833       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
834     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
835   }
836   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
837   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
838   Opts.Warnings = getAllArgValues(Args, OPT_W);
839 }
840 
841 static FrontendOptions::InputKind
842 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
843   using namespace cc1options;
844   Opts.ProgramAction = frontend::ParseSyntaxOnly;
845   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
846     switch (A->getOption().getID()) {
847     default:
848       assert(0 && "Invalid option in group!");
849     case OPT_ast_dump:
850       Opts.ProgramAction = frontend::ASTDump; break;
851     case OPT_ast_print:
852       Opts.ProgramAction = frontend::ASTPrint; break;
853     case OPT_ast_print_xml:
854       Opts.ProgramAction = frontend::ASTPrintXML; break;
855     case OPT_ast_view:
856       Opts.ProgramAction = frontend::ASTView; break;
857     case OPT_dump_raw_tokens:
858       Opts.ProgramAction = frontend::DumpRawTokens; break;
859     case OPT_dump_record_layouts:
860       Opts.ProgramAction = frontend::DumpRecordLayouts; break;
861     case OPT_dump_tokens:
862       Opts.ProgramAction = frontend::DumpTokens; break;
863     case OPT_S:
864       Opts.ProgramAction = frontend::EmitAssembly; break;
865     case OPT_emit_llvm_bc:
866       Opts.ProgramAction = frontend::EmitBC; break;
867     case OPT_emit_html:
868       Opts.ProgramAction = frontend::EmitHTML; break;
869     case OPT_emit_llvm:
870       Opts.ProgramAction = frontend::EmitLLVM; break;
871     case OPT_emit_llvm_only:
872       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
873     case OPT_emit_obj:
874       Opts.ProgramAction = frontend::EmitObj; break;
875     case OPT_fixit:
876       Opts.ProgramAction = frontend::FixIt; break;
877     case OPT_emit_pch:
878       Opts.ProgramAction = frontend::GeneratePCH; break;
879     case OPT_emit_pth:
880       Opts.ProgramAction = frontend::GeneratePTH; break;
881     case OPT_parse_noop:
882       Opts.ProgramAction = frontend::ParseNoop; break;
883     case OPT_parse_print_callbacks:
884       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
885     case OPT_fsyntax_only:
886       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
887     case OPT_print_decl_contexts:
888       Opts.ProgramAction = frontend::PrintDeclContext; break;
889     case OPT_E:
890       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
891     case OPT_rewrite_macros:
892       Opts.ProgramAction = frontend::RewriteMacros; break;
893     case OPT_rewrite_objc:
894       Opts.ProgramAction = frontend::RewriteObjC; break;
895     case OPT_rewrite_test:
896       Opts.ProgramAction = frontend::RewriteTest; break;
897     case OPT_analyze:
898       Opts.ProgramAction = frontend::RunAnalysis; break;
899     case OPT_Eonly:
900       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
901     }
902   }
903   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
904     Opts.ProgramAction = frontend::PluginAction;
905     Opts.ActionName = A->getValue(Args);
906   }
907 
908   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
909     Opts.CodeCompletionAt =
910       ParsedSourceLocation::FromString(A->getValue(Args));
911     if (Opts.CodeCompletionAt.FileName.empty())
912       Diags.Report(diag::err_drv_invalid_value)
913         << A->getAsString(Args) << A->getValue(Args);
914   }
915   Opts.DebugCodeCompletionPrinter =
916     !Args.hasArg(OPT_no_code_completion_debug_printer);
917   Opts.DisableFree = Args.hasArg(OPT_disable_free);
918   Opts.EmptyInputOnly = Args.hasArg(OPT_empty_input_only);
919 
920   Opts.FixItLocations.clear();
921   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
922          ie = Args.filtered_end(); it != ie; ++it) {
923     const char *Loc = it->getValue(Args);
924     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
925 
926     if (PSL.FileName.empty()) {
927       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
928       continue;
929     }
930 
931     Opts.FixItLocations.push_back(PSL);
932   }
933 
934   Opts.OutputFile = getLastArgValue(Args, OPT_o);
935   Opts.Plugins = getAllArgValues(Args, OPT_load);
936   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
937   Opts.ShowHelp = Args.hasArg(OPT_help);
938   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
939   Opts.ShowStats = Args.hasArg(OPT_print_stats);
940   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
941   Opts.ShowVersion = Args.hasArg(OPT_version);
942   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
943   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
944 
945   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
946   if (const Arg *A = Args.getLastArg(OPT_x)) {
947     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
948       .Case("c", FrontendOptions::IK_C)
949       .Case("cl", FrontendOptions::IK_OpenCL)
950       .Case("c", FrontendOptions::IK_C)
951       .Case("cl", FrontendOptions::IK_OpenCL)
952       .Case("c++", FrontendOptions::IK_CXX)
953       .Case("objective-c", FrontendOptions::IK_ObjC)
954       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
955       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
956       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
957       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
958       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
959       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
960       .Case("c-header", FrontendOptions::IK_C)
961       .Case("objective-c-header", FrontendOptions::IK_ObjC)
962       .Case("c++-header", FrontendOptions::IK_CXX)
963       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
964       .Case("ast", FrontendOptions::IK_AST)
965       .Default(FrontendOptions::IK_None);
966     if (DashX == FrontendOptions::IK_None)
967       Diags.Report(diag::err_drv_invalid_value)
968         << A->getAsString(Args) << A->getValue(Args);
969   }
970 
971   // '-' is the default input if none is given.
972   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
973   Opts.Inputs.clear();
974   if (Inputs.empty())
975     Inputs.push_back("-");
976   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
977     FrontendOptions::InputKind IK = DashX;
978     if (IK == FrontendOptions::IK_None) {
979       IK = FrontendOptions::getInputKindForExtension(
980         llvm::StringRef(Inputs[i]).rsplit('.').second);
981       // FIXME: Remove this hack.
982       if (i == 0)
983         DashX = IK;
984     }
985     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
986   }
987 
988   return DashX;
989 }
990 
991 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
992                                                  void *MainAddr) {
993   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
994 
995   if (!P.isEmpty()) {
996     P.eraseComponent();  // Remove /clang from foo/bin/clang
997     P.eraseComponent();  // Remove /bin   from foo/bin
998 
999     // Get foo/lib/clang/<version>/include
1000     P.appendComponent("lib");
1001     P.appendComponent("clang");
1002     P.appendComponent(CLANG_VERSION_STRING);
1003   }
1004 
1005   return P.str();
1006 }
1007 
1008 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1009   using namespace cc1options;
1010   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1011   Opts.Verbose = Args.hasArg(OPT_v);
1012   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1013   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1014   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1015 
1016   // Add -I... and -F... options in order.
1017   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1018          ie = Args.filtered_end(); it != ie; ++it)
1019     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1020                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1021 
1022   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1023   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1024   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1025                                              OPT_iwithprefixbefore),
1026          ie = Args.filtered_end(); it != ie; ++it) {
1027     if (it->getOption().matches(OPT_iprefix))
1028       Prefix = it->getValue(Args);
1029     else if (it->getOption().matches(OPT_iwithprefix))
1030       Opts.AddPath(Prefix.str() + it->getValue(Args),
1031                    frontend::System, false, false);
1032     else
1033       Opts.AddPath(Prefix.str() + it->getValue(Args),
1034                    frontend::Angled, false, false);
1035   }
1036 
1037   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1038          ie = Args.filtered_end(); it != ie; ++it)
1039     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1040   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1041          ie = Args.filtered_end(); it != ie; ++it)
1042     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1043   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1044          ie = Args.filtered_end(); it != ie; ++it)
1045     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1046 
1047   // FIXME: Need options for the various environment variables!
1048 }
1049 
1050 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1051                           FrontendOptions::InputKind IK,
1052                           Diagnostic &Diags) {
1053   // FIXME: Cleanup per-file based stuff.
1054 
1055   // Set some properties which depend soley on the input kind; it would be nice
1056   // to move these to the language standard, and have the driver resolve the
1057   // input kind + language standard.
1058   if (IK == FrontendOptions::IK_Asm) {
1059     Opts.AsmPreprocessor = 1;
1060   } else if (IK == FrontendOptions::IK_ObjC ||
1061              IK == FrontendOptions::IK_ObjCXX ||
1062              IK == FrontendOptions::IK_PreprocessedObjC ||
1063              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1064     Opts.ObjC1 = Opts.ObjC2 = 1;
1065   }
1066 
1067   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1068   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1069     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1070 #define LANGSTANDARD(id, name, desc, features) \
1071       .Case(name, LangStandard::lang_##id)
1072 #include "clang/Frontend/LangStandards.def"
1073       .Default(LangStandard::lang_unspecified);
1074     if (LangStd == LangStandard::lang_unspecified)
1075       Diags.Report(diag::err_drv_invalid_value)
1076         << A->getAsString(Args) << A->getValue(Args);
1077   }
1078 
1079   if (LangStd == LangStandard::lang_unspecified) {
1080     // Based on the base language, pick one.
1081     switch (IK) {
1082     case FrontendOptions::IK_None:
1083     case FrontendOptions::IK_AST:
1084       assert(0 && "Invalid input kind!");
1085     case FrontendOptions::IK_OpenCL:
1086       LangStd = LangStandard::lang_opencl;
1087       break;
1088     case FrontendOptions::IK_Asm:
1089     case FrontendOptions::IK_C:
1090     case FrontendOptions::IK_PreprocessedC:
1091     case FrontendOptions::IK_ObjC:
1092     case FrontendOptions::IK_PreprocessedObjC:
1093       LangStd = LangStandard::lang_gnu99;
1094       break;
1095     case FrontendOptions::IK_CXX:
1096     case FrontendOptions::IK_PreprocessedCXX:
1097     case FrontendOptions::IK_ObjCXX:
1098     case FrontendOptions::IK_PreprocessedObjCXX:
1099       LangStd = LangStandard::lang_gnucxx98;
1100       break;
1101     }
1102   }
1103 
1104   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1105   Opts.BCPLComment = Std.hasBCPLComments();
1106   Opts.C99 = Std.isC99();
1107   Opts.CPlusPlus = Std.isCPlusPlus();
1108   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1109   Opts.Digraphs = Std.hasDigraphs();
1110   Opts.GNUMode = Std.isGNUMode();
1111   Opts.GNUInline = !Std.isC99();
1112   Opts.HexFloats = Std.hasHexFloats();
1113   Opts.ImplicitInt = Std.hasImplicitInt();
1114 
1115   // OpenCL has some additional defaults.
1116   if (LangStd == LangStandard::lang_opencl) {
1117     Opts.OpenCL = 1;
1118     Opts.AltiVec = 1;
1119     Opts.CXXOperatorNames = 1;
1120     Opts.LaxVectorConversions = 1;
1121   }
1122 
1123   // OpenCL and C++ both have bool, true, false keywords.
1124   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1125 
1126   if (Opts.CPlusPlus)
1127     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1128 
1129   if (Args.hasArg(OPT_fobjc_gc_only))
1130     Opts.setGCMode(LangOptions::GCOnly);
1131   else if (Args.hasArg(OPT_fobjc_gc))
1132     Opts.setGCMode(LangOptions::HybridGC);
1133 
1134   if (Args.hasArg(OPT_print_ivar_layout))
1135     Opts.ObjCGCBitmapPrint = 1;
1136 
1137   if (Args.hasArg(OPT_faltivec))
1138     Opts.AltiVec = 1;
1139 
1140   if (Args.hasArg(OPT_pthread))
1141     Opts.POSIXThreads = 1;
1142 
1143   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1144                                         "default");
1145   if (Vis == "default")
1146     Opts.setVisibilityMode(LangOptions::Default);
1147   else if (Vis == "hidden")
1148     Opts.setVisibilityMode(LangOptions::Hidden);
1149   else if (Vis == "protected")
1150     Opts.setVisibilityMode(LangOptions::Protected);
1151   else
1152     Diags.Report(diag::err_drv_invalid_value)
1153       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1154 
1155   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1156 
1157   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1158   // is specified, or -std is set to a conforming mode.
1159   Opts.Trigraphs = !Opts.GNUMode;
1160   if (Args.hasArg(OPT_trigraphs))
1161     Opts.Trigraphs = 1;
1162 
1163   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1164                                    OPT_fno_dollars_in_identifiers,
1165                                    !Opts.AsmPreprocessor);
1166   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1167   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1168   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1169   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1170   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1171     Opts.LaxVectorConversions = 0;
1172   if (Args.hasArg(OPT_fno_threadsafe_statics))
1173     Opts.ThreadsafeStatics = 0;
1174   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1175   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1176   Opts.Blocks = Args.hasArg(OPT_fblocks);
1177   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1178   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1179   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1180   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1181   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1182   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1183   Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1184   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1185   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1186   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1187                                                Diags);
1188   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1189   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1190                                                  OPT_fconstant_string_class);
1191   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1192   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1193   if (Opts.ObjCNonFragileABI2)
1194     Opts.ObjCNonFragileABI = true;
1195   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1196   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1197   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1198   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1199   Opts.Static = Args.hasArg(OPT_static_define);
1200   Opts.DumpVtableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1201   Opts.OptimizeSize = 0;
1202 
1203   // FIXME: Eliminate this dependency.
1204   unsigned Opt =
1205     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1206   Opts.Optimize = Opt != 0;
1207 
1208   // This is the __NO_INLINE__ define, which just depends on things like the
1209   // optimization level and -fno-inline, not actually whether the backend has
1210   // inlining enabled.
1211   //
1212   // FIXME: This is affected by other options (-fno-inline).
1213   Opts.NoInline = !Opt;
1214 
1215   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1216   switch (SSP) {
1217   default:
1218     Diags.Report(diag::err_drv_invalid_value)
1219       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1220     break;
1221   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1222   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1223   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1224   }
1225 }
1226 
1227 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1228                                   Diagnostic &Diags) {
1229   using namespace cc1options;
1230   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1231   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1232   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1233       Opts.TokenCache = A->getValue(Args);
1234   else
1235     Opts.TokenCache = Opts.ImplicitPTHInclude;
1236   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1237   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1238   // Add macros from the command line.
1239   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1240          ie = Args.filtered_end(); it != ie; ++it) {
1241     if (it->getOption().matches(OPT_D))
1242       Opts.addMacroDef(it->getValue(Args));
1243     else
1244       Opts.addMacroUndef(it->getValue(Args));
1245   }
1246 
1247   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1248 
1249   // Add the ordered list of -includes.
1250   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1251                                              OPT_include_pth),
1252          ie = Args.filtered_end(); it != ie; ++it) {
1253     // PCH is handled specially, we need to extra the original include path.
1254     if (it->getOption().matches(OPT_include_pch)) {
1255       std::string OriginalFile =
1256         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1257       if (OriginalFile.empty())
1258         continue;
1259 
1260       Opts.Includes.push_back(OriginalFile);
1261     } else
1262       Opts.Includes.push_back(it->getValue(Args));
1263   }
1264 
1265   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1266          ie = Args.filtered_end(); it != ie; ++it) {
1267     std::pair<llvm::StringRef,llvm::StringRef> Split =
1268       llvm::StringRef(it->getValue(Args)).split(';');
1269 
1270     if (Split.second.empty()) {
1271       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1272       continue;
1273     }
1274 
1275     Opts.addRemappedFile(Split.first, Split.second);
1276   }
1277 }
1278 
1279 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1280                                         ArgList &Args) {
1281   using namespace cc1options;
1282   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1283   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1284   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1285   Opts.ShowComments = Args.hasArg(OPT_C);
1286   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1287 }
1288 
1289 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1290   using namespace cc1options;
1291   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1292   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1293   Opts.Triple = getLastArgValue(Args, OPT_triple);
1294   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1295 
1296   // Use the host triple if unspecified.
1297   if (Opts.Triple.empty())
1298     Opts.Triple = llvm::sys::getHostTriple();
1299 }
1300 
1301 //
1302 
1303 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1304                                         const char **ArgBegin,
1305                                         const char **ArgEnd,
1306                                         Diagnostic &Diags) {
1307   // Parse the arguments.
1308   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1309   unsigned MissingArgIndex, MissingArgCount;
1310   llvm::OwningPtr<InputArgList> Args(
1311     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1312 
1313   // Check for missing argument error.
1314   if (MissingArgCount)
1315     Diags.Report(diag::err_drv_missing_argument)
1316       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1317 
1318   // Issue errors on unknown arguments.
1319   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1320          ie = Args->filtered_end(); it != ie; ++it)
1321     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1322 
1323   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1324   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1325   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1326   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1327   FrontendOptions::InputKind DashX =
1328     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1329   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1330   if (DashX != FrontendOptions::IK_AST)
1331     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1332   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1333   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1334   ParseTargetArgs(Res.getTargetOpts(), *Args);
1335 }
1336