xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision fca18c1b41f590686a275e0f0a1ee652510296a2) 
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   switch (Opts.getObjCDispatchMethod()) {
182   case CodeGenOptions::Legacy:
183     break;
184   case CodeGenOptions::Mixed:
185     Res.push_back("-fobjc-dispatch-method=mixed");
186     break;
187   case CodeGenOptions::NonLegacy:
188     Res.push_back("-fobjc-dispatch-method=non-legacy");
189     break;
190   }
191   if (Opts.SoftFloat)
192     Res.push_back("-msoft-float");
193   if (Opts.UnwindTables)
194     Res.push_back("-munwind-tables");
195   if (Opts.RelocationModel != "pic") {
196     Res.push_back("-mrelocation-model");
197     Res.push_back(Opts.RelocationModel);
198   }
199   if (!Opts.VerifyModule)
200     Res.push_back("-disable-llvm-verifier");
201 }
202 
203 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
204                                        std::vector<std::string> &Res) {
205   if (Opts.IncludeSystemHeaders)
206     Res.push_back("-sys-header-deps");
207   if (Opts.UsePhonyTargets)
208     Res.push_back("-MP");
209   if (!Opts.OutputFile.empty()) {
210     Res.push_back("-dependency-file");
211     Res.push_back(Opts.OutputFile);
212   }
213   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
214     Res.push_back("-MT");
215     Res.push_back(Opts.Targets[i]);
216   }
217 }
218 
219 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
220                                  std::vector<std::string> &Res) {
221   if (Opts.IgnoreWarnings)
222     Res.push_back("-w");
223   if (Opts.NoRewriteMacros)
224     Res.push_back("-Wno-rewrite-macros");
225   if (Opts.Pedantic)
226     Res.push_back("-pedantic");
227   if (Opts.PedanticErrors)
228     Res.push_back("-pedantic-errors");
229   if (!Opts.ShowColumn)
230     Res.push_back("-fno-show-column");
231   if (!Opts.ShowLocation)
232     Res.push_back("-fno-show-source-location");
233   if (!Opts.ShowCarets)
234     Res.push_back("-fno-caret-diagnostics");
235   if (!Opts.ShowFixits)
236     Res.push_back("-fno-diagnostics-fixit-info");
237   if (Opts.ShowSourceRanges)
238     Res.push_back("-fdiagnostics-print-source-range-info");
239   if (Opts.ShowColors)
240     Res.push_back("-fcolor-diagnostics");
241   if (Opts.VerifyDiagnostics)
242     Res.push_back("-verify");
243   if (Opts.BinaryOutput)
244     Res.push_back("-fdiagnostics-binary");
245   if (Opts.ShowOptionNames)
246     Res.push_back("-fdiagnostics-show-option");
247   if (Opts.ErrorLimit) {
248     Res.push_back("-ferror-limit");
249     Res.push_back(llvm::utostr(Opts.ErrorLimit));
250   }
251   if (Opts.TemplateBacktraceLimit != 10) {
252     Res.push_back("-ftemplate-backtrace-limit");
253     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
254   }
255 
256   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
257     Res.push_back("-ftabstop");
258     Res.push_back(llvm::utostr(Opts.TabStop));
259   }
260   if (Opts.MessageLength) {
261     Res.push_back("-fmessage-length");
262     Res.push_back(llvm::utostr(Opts.MessageLength));
263   }
264   if (!Opts.DumpBuildInformation.empty()) {
265     Res.push_back("-dump-build-information");
266     Res.push_back(Opts.DumpBuildInformation);
267   }
268   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
269     Res.push_back("-W" + Opts.Warnings[i]);
270 }
271 
272 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
273   switch (Kind) {
274   case FrontendOptions::IK_None:              break;
275   case FrontendOptions::IK_AST:               return "ast";
276   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
277   case FrontendOptions::IK_C:                 return "c";
278   case FrontendOptions::IK_CXX:               return "c++";
279   case FrontendOptions::IK_ObjC:              return "objective-c";
280   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
281   case FrontendOptions::IK_OpenCL:            return "cl";
282   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
283   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
284   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
285   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
286   }
287 
288   llvm_unreachable("Unexpected language kind!");
289   return 0;
290 }
291 
292 static const char *getActionName(frontend::ActionKind Kind) {
293   switch (Kind) {
294   case frontend::PluginAction:
295   case frontend::InheritanceView:
296     llvm_unreachable("Invalid kind!");
297 
298   case frontend::ASTDump:                return "-ast-dump";
299   case frontend::ASTPrint:               return "-ast-print";
300   case frontend::ASTPrintXML:            return "-ast-print-xml";
301   case frontend::ASTView:                return "-ast-view";
302   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
303   case frontend::DumpTokens:             return "-dump-tokens";
304   case frontend::EmitAssembly:           return "-S";
305   case frontend::EmitBC:                 return "-emit-llvm-bc";
306   case frontend::EmitHTML:               return "-emit-html";
307   case frontend::EmitLLVM:               return "-emit-llvm";
308   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
309   case frontend::EmitObj:                return "-emit-obj";
310   case frontend::FixIt:                  return "-fixit";
311   case frontend::GeneratePCH:            return "-emit-pch";
312   case frontend::GeneratePTH:            return "-emit-pth";
313   case frontend::InitOnly:               return "-init-only";
314   case frontend::ParseNoop:              return "-parse-noop";
315   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
316   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
317   case frontend::PrintDeclContext:       return "-print-decl-contexts";
318   case frontend::PrintPreprocessedInput: return "-E";
319   case frontend::RewriteMacros:          return "-rewrite-macros";
320   case frontend::RewriteObjC:            return "-rewrite-objc";
321   case frontend::RewriteTest:            return "-rewrite-test";
322   case frontend::RunAnalysis:            return "-analyze";
323   case frontend::RunPreprocessorOnly:    return "-Eonly";
324   }
325 
326   llvm_unreachable("Unexpected language kind!");
327   return 0;
328 }
329 
330 static void FrontendOptsToArgs(const FrontendOptions &Opts,
331                                std::vector<std::string> &Res) {
332   if (!Opts.DebugCodeCompletionPrinter)
333     Res.push_back("-no-code-completion-debug-printer");
334   if (Opts.DisableFree)
335     Res.push_back("-disable-free");
336   if (Opts.RelocatablePCH)
337     Res.push_back("-relocatable-pch");
338   if (Opts.ShowHelp)
339     Res.push_back("-help");
340   if (Opts.ShowMacrosInCodeCompletion)
341     Res.push_back("-code-completion-macros");
342   if (Opts.ShowStats)
343     Res.push_back("-print-stats");
344   if (Opts.ShowTimers)
345     Res.push_back("-ftime-report");
346   if (Opts.ShowVersion)
347     Res.push_back("-version");
348 
349   bool NeedLang = false;
350   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
351     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
352         Opts.Inputs[i].first)
353       NeedLang = true;
354   if (NeedLang) {
355     Res.push_back("-x");
356     Res.push_back(getInputKindName(Opts.Inputs[0].first));
357   }
358   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
359     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
360            "Unable to represent this input vector!");
361     Res.push_back(Opts.Inputs[i].second);
362   }
363 
364   if (!Opts.OutputFile.empty()) {
365     Res.push_back("-o");
366     Res.push_back(Opts.OutputFile);
367   }
368   if (!Opts.ViewClassInheritance.empty()) {
369     Res.push_back("-cxx-inheritance-view");
370     Res.push_back(Opts.ViewClassInheritance);
371   }
372   if (!Opts.CodeCompletionAt.FileName.empty()) {
373     Res.push_back("-code-completion-at");
374     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
375                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
376                   llvm::utostr(Opts.CodeCompletionAt.Column));
377   }
378   if (Opts.ProgramAction != frontend::InheritanceView &&
379       Opts.ProgramAction != frontend::PluginAction)
380     Res.push_back(getActionName(Opts.ProgramAction));
381   if (!Opts.ActionName.empty()) {
382     Res.push_back("-plugin");
383     Res.push_back(Opts.ActionName);
384   }
385   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
386     Res.push_back("-load");
387     Res.push_back(Opts.Plugins[i]);
388   }
389   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
390     Res.push_back("-ast-merge");
391     Res.push_back(Opts.ASTMergeFiles[i]);
392   }
393   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
394     Res.push_back("-mllvm");
395     Res.push_back(Opts.LLVMArgs[i]);
396   }
397 }
398 
399 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
400                                    std::vector<std::string> &Res) {
401   if (Opts.Sysroot != "/") {
402     Res.push_back("-isysroot");
403     Res.push_back(Opts.Sysroot);
404   }
405 
406   /// User specified include entries.
407   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
408     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
409     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
410       llvm::report_fatal_error("Invalid option set!");
411     if (E.IsUserSupplied) {
412       if (E.Group == frontend::After) {
413         Res.push_back("-idirafter");
414       } else if (E.Group == frontend::Quoted) {
415         Res.push_back("-iquote");
416       } else if (E.Group == frontend::System) {
417         Res.push_back("-isystem");
418       } else {
419         assert(E.Group == frontend::Angled && "Invalid group!");
420         Res.push_back(E.IsFramework ? "-F" : "-I");
421       }
422     } else {
423       if (E.Group != frontend::Angled && E.Group != frontend::System)
424         llvm::report_fatal_error("Invalid option set!");
425       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
426                     "-iwithprefix");
427     }
428     Res.push_back(E.Path);
429   }
430 
431   if (!Opts.EnvIncPath.empty()) {
432     // FIXME: Provide an option for this, and move env detection to driver.
433     llvm::report_fatal_error("Not yet implemented!");
434   }
435   if (!Opts.CEnvIncPath.empty()) {
436     // FIXME: Provide an option for this, and move env detection to driver.
437     llvm::report_fatal_error("Not yet implemented!");
438   }
439   if (!Opts.ObjCEnvIncPath.empty()) {
440     // FIXME: Provide an option for this, and move env detection to driver.
441     llvm::report_fatal_error("Not yet implemented!");
442   }
443   if (!Opts.CXXEnvIncPath.empty()) {
444     // FIXME: Provide an option for this, and move env detection to driver.
445     llvm::report_fatal_error("Not yet implemented!");
446   }
447   if (!Opts.ObjCXXEnvIncPath.empty()) {
448     // FIXME: Provide an option for this, and move env detection to driver.
449     llvm::report_fatal_error("Not yet implemented!");
450   }
451   if (!Opts.ResourceDir.empty()) {
452     Res.push_back("-resource-dir");
453     Res.push_back(Opts.ResourceDir);
454   }
455   if (!Opts.UseStandardIncludes)
456     Res.push_back("-nostdinc");
457   if (!Opts.UseStandardCXXIncludes)
458     Res.push_back("-nostdinc++");
459   if (Opts.Verbose)
460     Res.push_back("-v");
461 }
462 
463 static void LangOptsToArgs(const LangOptions &Opts,
464                            std::vector<std::string> &Res) {
465   LangOptions DefaultLangOpts;
466 
467   // FIXME: Need to set -std to get all the implicit options.
468 
469   // FIXME: We want to only pass options relative to the defaults, which
470   // requires constructing a target. :(
471   //
472   // It would be better to push the all target specific choices into the driver,
473   // so that everything below that was more uniform.
474 
475   if (Opts.Trigraphs)
476     Res.push_back("-trigraphs");
477   // Implicit based on the input kind:
478   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
479   // Implicit based on the input language standard:
480   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
481   if (Opts.DollarIdents)
482     Res.push_back("-fdollars-in-identifiers");
483   if (Opts.GNUMode && !Opts.GNUKeywords)
484     Res.push_back("-fno-gnu-keywords");
485   if (!Opts.GNUMode && Opts.GNUKeywords)
486     Res.push_back("-fgnu-keywords");
487   if (Opts.Microsoft)
488     Res.push_back("-fms-extensions");
489   if (Opts.ObjCNonFragileABI)
490     Res.push_back("-fobjc-nonfragile-abi");
491   if (Opts.ObjCNonFragileABI2)
492     Res.push_back("-fobjc-nonfragile-abi2");
493   // NoInline is implicit.
494   if (!Opts.CXXOperatorNames)
495     Res.push_back("-fno-operator-names");
496   if (Opts.PascalStrings)
497     Res.push_back("-fpascal-strings");
498   if (Opts.CatchUndefined)
499     Res.push_back("-fcatch-undefined-behavior");
500   if (Opts.WritableStrings)
501     Res.push_back("-fwritable-strings");
502   if (Opts.ConstStrings)
503     Res.push_back("-Wwrite-strings");
504   if (!Opts.LaxVectorConversions)
505     Res.push_back("-fno-lax-vector-conversions");
506   if (Opts.AltiVec)
507     Res.push_back("-faltivec");
508   if (Opts.Exceptions)
509     Res.push_back("-fexceptions");
510   if (Opts.SjLjExceptions)
511     Res.push_back("-fsjlj-exceptions");
512   if (!Opts.RTTI)
513     Res.push_back("-fno-rtti");
514   if (!Opts.NeXTRuntime)
515     Res.push_back("-fgnu-runtime");
516   if (Opts.Freestanding)
517     Res.push_back("-ffreestanding");
518   if (Opts.NoBuiltin)
519     Res.push_back("-fno-builtin");
520   if (!Opts.AssumeSaneOperatorNew)
521     Res.push_back("-fno-assume-sane-operator-new");
522   if (!Opts.ThreadsafeStatics)
523     Res.push_back("-fno-threadsafe-statics");
524   if (Opts.POSIXThreads)
525     Res.push_back("-pthread");
526   if (Opts.Blocks)
527     Res.push_back("-fblocks");
528   if (Opts.EmitAllDecls)
529     Res.push_back("-femit-all-decls");
530   if (Opts.MathErrno)
531     Res.push_back("-fmath-errno");
532   if (Opts.OverflowChecking)
533     Res.push_back("-ftrapv");
534   if (Opts.HeinousExtensions)
535     Res.push_back("-fheinous-gnu-extensions");
536   // Optimize is implicit.
537   // OptimizeSize is implicit.
538   if (Opts.Static)
539     Res.push_back("-static-define");
540   if (Opts.DumpRecordLayouts)
541     Res.push_back("-fdump-record-layouts");
542   if (Opts.DumpVTableLayouts)
543     Res.push_back("-fdump-vtable-layouts");
544   if (Opts.NoBitFieldTypeAlign)
545     Res.push_back("-fno-bitfield-type-alignment");
546   if (Opts.SjLjExceptions)
547     Res.push_back("-fsjlj-exceptions");
548   if (Opts.PICLevel) {
549     Res.push_back("-pic-level");
550     Res.push_back(llvm::utostr(Opts.PICLevel));
551   }
552   if (Opts.ObjCGCBitmapPrint)
553     Res.push_back("-print-ivar-layout");
554   if (Opts.NoConstantCFStrings)
555     Res.push_back("-fno-constant-cfstrings");
556   if (!Opts.AccessControl)
557     Res.push_back("-fno-access-control");
558   if (!Opts.CharIsSigned)
559     Res.push_back("-fno-signed-char");
560   if (Opts.ShortWChar)
561     Res.push_back("-fshort-wchar");
562   if (!Opts.ElideConstructors)
563     Res.push_back("-fno-elide-constructors");
564   if (Opts.getGCMode() != LangOptions::NonGC) {
565     if (Opts.getGCMode() == LangOptions::HybridGC) {
566       Res.push_back("-fobjc-gc");
567     } else {
568       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
569       Res.push_back("-fobjc-gc-only");
570     }
571   }
572   if (Opts.getVisibilityMode() != LangOptions::Default) {
573     Res.push_back("-fvisibility");
574     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
575       Res.push_back("hidden");
576     } else {
577       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
578              "Invalid visibility!");
579       Res.push_back("protected");
580     }
581   }
582   if (Opts.getStackProtectorMode() != 0) {
583     Res.push_back("-stack-protector");
584     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
585   }
586   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
587     Res.push_back("-ftemplate-depth");
588     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
589   }
590   if (!Opts.ObjCConstantStringClass.empty()) {
591     Res.push_back("-fconstant-string-class");
592     Res.push_back(Opts.ObjCConstantStringClass);
593   }
594 }
595 
596 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
597                                    std::vector<std::string> &Res) {
598   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
599     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
600                   Opts.Macros[i].first);
601   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
602     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
603     Res.push_back("-include");
604     Res.push_back(Opts.Includes[i]);
605   }
606   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
607     Res.push_back("-imacros");
608     Res.push_back(Opts.MacroIncludes[i]);
609   }
610   if (!Opts.UsePredefines)
611     Res.push_back("-undef");
612   if (Opts.DetailedRecord)
613     Res.push_back("-detailed-preprocessing-record");
614   if (!Opts.ImplicitPCHInclude.empty()) {
615     Res.push_back("-include-pch");
616     Res.push_back(Opts.ImplicitPCHInclude);
617   }
618   if (!Opts.ImplicitPTHInclude.empty()) {
619     Res.push_back("-include-pth");
620     Res.push_back(Opts.ImplicitPTHInclude);
621   }
622   if (!Opts.TokenCache.empty()) {
623     if (Opts.ImplicitPTHInclude.empty()) {
624       Res.push_back("-token-cache");
625       Res.push_back(Opts.TokenCache);
626     } else
627       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
628              "Unsupported option combination!");
629   }
630   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
631     Res.push_back("-remap-file");
632     Res.push_back(Opts.RemappedFiles[i].first + ";" +
633                   Opts.RemappedFiles[i].second);
634   }
635 }
636 
637 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
638                                          std::vector<std::string> &Res) {
639   if (!Opts.ShowCPP && !Opts.ShowMacros)
640     llvm::report_fatal_error("Invalid option combination!");
641 
642   if (Opts.ShowCPP && Opts.ShowMacros)
643     Res.push_back("-dD");
644   else if (!Opts.ShowCPP && Opts.ShowMacros)
645     Res.push_back("-dM");
646 
647   if (!Opts.ShowLineMarkers)
648     Res.push_back("-P");
649   if (Opts.ShowComments)
650     Res.push_back("-C");
651   if (Opts.ShowMacroComments)
652     Res.push_back("-CC");
653 }
654 
655 static void TargetOptsToArgs(const TargetOptions &Opts,
656                              std::vector<std::string> &Res) {
657   Res.push_back("-triple");
658   Res.push_back(Opts.Triple);
659   if (!Opts.CPU.empty()) {
660     Res.push_back("-target-cpu");
661     Res.push_back(Opts.CPU);
662   }
663   if (!Opts.ABI.empty()) {
664     Res.push_back("-target-abi");
665     Res.push_back(Opts.ABI);
666   }
667   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
668     Res.push_back("-target-feature");
669     Res.push_back(Opts.Features[i]);
670   }
671 }
672 
673 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
674   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
675   CodeGenOptsToArgs(getCodeGenOpts(), Res);
676   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
677   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
678   FrontendOptsToArgs(getFrontendOpts(), Res);
679   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
680   LangOptsToArgs(getLangOpts(), Res);
681   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
682   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
683   TargetOptsToArgs(getTargetOpts(), Res);
684 }
685 
686 //===----------------------------------------------------------------------===//
687 // Deserialization (to args)
688 //===----------------------------------------------------------------------===//
689 
690 using namespace clang::driver;
691 using namespace clang::driver::cc1options;
692 
693 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
694                                        llvm::StringRef Default = "") {
695   if (Arg *A = Args.getLastArg(ID))
696     return A->getValue(Args);
697   return Default;
698 }
699 
700 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
701                               int Default, Diagnostic &Diags) {
702   Arg *A = Args.getLastArg(ID);
703   if (!A)
704     return Default;
705 
706   int Res = Default;
707   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
708     Diags.Report(diag::err_drv_invalid_int_value)
709         << A->getAsString(Args) << A->getValue(Args);
710 
711   return Res;
712 }
713 
714 static std::vector<std::string>
715 getAllArgValues(ArgList &Args, cc1options::ID ID) {
716   llvm::SmallVector<const char *, 16> Values;
717   Args.AddAllArgValues(Values, ID);
718   return std::vector<std::string>(Values.begin(), Values.end());
719 }
720 
721 //
722 
723 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
724                               Diagnostic &Diags) {
725   using namespace cc1options;
726 
727   Opts.AnalysisList.clear();
728 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
729   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
730 #include "clang/Frontend/Analyses.def"
731 
732   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
733     llvm::StringRef Name = A->getValue(Args);
734     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
735 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
736       .Case(CMDFLAG, NAME##Model)
737 #include "clang/Frontend/Analyses.def"
738       .Default(NumStores);
739     // FIXME: Error handling.
740     if (Value == NumStores)
741       Diags.Report(diag::err_drv_invalid_value)
742         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
743     else
744       Opts.AnalysisStoreOpt = Value;
745   }
746 
747   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
748     llvm::StringRef Name = A->getValue(Args);
749     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
750 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
751       .Case(CMDFLAG, NAME##Model)
752 #include "clang/Frontend/Analyses.def"
753       .Default(NumConstraints);
754     // FIXME: Error handling.
755     if (Value == NumConstraints)
756       Diags.Report(diag::err_drv_invalid_value)
757         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
758     else
759       Opts.AnalysisConstraintsOpt = Value;
760   }
761 
762   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
763     llvm::StringRef Name = A->getValue(Args);
764     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
765 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
766       .Case(CMDFLAG, PD_##NAME)
767 #include "clang/Frontend/Analyses.def"
768       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
769     // FIXME: Error handling.
770     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
771       Diags.Report(diag::err_drv_invalid_value)
772         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
773     else
774       Opts.AnalysisDiagOpt = Value;
775   }
776 
777   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
778   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
779   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
780   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
781   Opts.AnalyzeNestedBlocks =
782     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
783   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
784   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
785   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
786   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
787   Opts.EnableExperimentalInternalChecks =
788     Args.hasArg(OPT_analyzer_experimental_internal_checks);
789   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
790   Opts.MaxNodes = getLastArgIntValue(Args, OPT_analyzer_max_nodes,150000,Diags);
791 }
792 
793 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
794                              Diagnostic &Diags) {
795   using namespace cc1options;
796   // -Os implies -O2
797   if (Args.hasArg(OPT_Os))
798     Opts.OptimizationLevel = 2;
799   else {
800     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
801     if (Opts.OptimizationLevel > 3) {
802       Diags.Report(diag::err_drv_invalid_value)
803         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
804       Opts.OptimizationLevel = 3;
805     }
806   }
807 
808   // We must always run at least the always inlining pass.
809   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
810     : CodeGenOptions::OnlyAlwaysInlining;
811 
812   Opts.DebugInfo = Args.hasArg(OPT_g);
813   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
814   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
815   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
816   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
817   Opts.NoCommon = Args.hasArg(OPT_fno_common);
818   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
819   Opts.OptimizeSize = Args.hasArg(OPT_Os);
820   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
821 
822   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
823   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
824   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
825   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
826   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
827   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
828   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
829   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
830   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
831   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
832   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
833   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
834 
835   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
836   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
837 
838   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
839   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
840 
841   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
842     llvm::StringRef Name = A->getValue(Args);
843     unsigned Method = llvm::StringSwitch<unsigned>(Name)
844       .Case("legacy", CodeGenOptions::Legacy)
845       .Case("non-legacy", CodeGenOptions::NonLegacy)
846       .Case("mixed", CodeGenOptions::Mixed)
847       .Default(~0U);
848     if (Method == ~0U)
849       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
850     else
851       Opts.ObjCDispatchMethod = Method;
852   }
853 }
854 
855 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
856                                       ArgList &Args) {
857   using namespace cc1options;
858   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
859   Opts.Targets = getAllArgValues(Args, OPT_MT);
860   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
861   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
862 }
863 
864 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
865                                 Diagnostic &Diags) {
866   using namespace cc1options;
867   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
868   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
869   Opts.Pedantic = Args.hasArg(OPT_pedantic);
870   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
871   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
872   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
873   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
874   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
875   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
876   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
877   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
878   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
879   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
880   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
881   Opts.TemplateBacktraceLimit
882     = getLastArgIntValue(Args, OPT_ftemplate_backtrace_limit, 0, Diags);
883   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
884                                     DiagnosticOptions::DefaultTabStop, Diags);
885   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
886     Diags.Report(diag::warn_ignoring_ftabstop_value)
887       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
888     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
889   }
890   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
891   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
892   Opts.Warnings = getAllArgValues(Args, OPT_W);
893 }
894 
895 static FrontendOptions::InputKind
896 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
897   using namespace cc1options;
898   Opts.ProgramAction = frontend::ParseSyntaxOnly;
899   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
900     switch (A->getOption().getID()) {
901     default:
902       assert(0 && "Invalid option in group!");
903     case OPT_ast_dump:
904       Opts.ProgramAction = frontend::ASTDump; break;
905     case OPT_ast_print:
906       Opts.ProgramAction = frontend::ASTPrint; break;
907     case OPT_ast_print_xml:
908       Opts.ProgramAction = frontend::ASTPrintXML; break;
909     case OPT_ast_view:
910       Opts.ProgramAction = frontend::ASTView; break;
911     case OPT_dump_raw_tokens:
912       Opts.ProgramAction = frontend::DumpRawTokens; break;
913     case OPT_dump_tokens:
914       Opts.ProgramAction = frontend::DumpTokens; break;
915     case OPT_S:
916       Opts.ProgramAction = frontend::EmitAssembly; break;
917     case OPT_emit_llvm_bc:
918       Opts.ProgramAction = frontend::EmitBC; break;
919     case OPT_emit_html:
920       Opts.ProgramAction = frontend::EmitHTML; break;
921     case OPT_emit_llvm:
922       Opts.ProgramAction = frontend::EmitLLVM; break;
923     case OPT_emit_llvm_only:
924       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
925     case OPT_emit_obj:
926       Opts.ProgramAction = frontend::EmitObj; break;
927     case OPT_fixit_EQ:
928       Opts.FixItSuffix = A->getValue(Args);
929       // fall-through!
930     case OPT_fixit:
931       Opts.ProgramAction = frontend::FixIt; break;
932     case OPT_emit_pch:
933       Opts.ProgramAction = frontend::GeneratePCH; break;
934     case OPT_emit_pth:
935       Opts.ProgramAction = frontend::GeneratePTH; break;
936     case OPT_init_only:
937       Opts.ProgramAction = frontend::InitOnly; break;
938     case OPT_parse_noop:
939       Opts.ProgramAction = frontend::ParseNoop; break;
940     case OPT_parse_print_callbacks:
941       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
942     case OPT_fsyntax_only:
943       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
944     case OPT_print_decl_contexts:
945       Opts.ProgramAction = frontend::PrintDeclContext; break;
946     case OPT_E:
947       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
948     case OPT_rewrite_macros:
949       Opts.ProgramAction = frontend::RewriteMacros; break;
950     case OPT_rewrite_objc:
951       Opts.ProgramAction = frontend::RewriteObjC; break;
952     case OPT_rewrite_test:
953       Opts.ProgramAction = frontend::RewriteTest; break;
954     case OPT_analyze:
955       Opts.ProgramAction = frontend::RunAnalysis; break;
956     case OPT_Eonly:
957       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
958     }
959   }
960   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
961     Opts.ProgramAction = frontend::PluginAction;
962     Opts.ActionName = A->getValue(Args);
963   }
964 
965   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
966     Opts.CodeCompletionAt =
967       ParsedSourceLocation::FromString(A->getValue(Args));
968     if (Opts.CodeCompletionAt.FileName.empty())
969       Diags.Report(diag::err_drv_invalid_value)
970         << A->getAsString(Args) << A->getValue(Args);
971   }
972   Opts.DebugCodeCompletionPrinter =
973     !Args.hasArg(OPT_no_code_completion_debug_printer);
974   Opts.DisableFree = Args.hasArg(OPT_disable_free);
975 
976   Opts.OutputFile = getLastArgValue(Args, OPT_o);
977   Opts.Plugins = getAllArgValues(Args, OPT_load);
978   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
979   Opts.ShowHelp = Args.hasArg(OPT_help);
980   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
981   Opts.ShowStats = Args.hasArg(OPT_print_stats);
982   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
983   Opts.ShowVersion = Args.hasArg(OPT_version);
984   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
985   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
986   Opts.LLVMArgs = getAllArgValues(Args, OPT_mllvm);
987 
988   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
989   if (const Arg *A = Args.getLastArg(OPT_x)) {
990     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
991       .Case("c", FrontendOptions::IK_C)
992       .Case("cl", FrontendOptions::IK_OpenCL)
993       .Case("c", FrontendOptions::IK_C)
994       .Case("cl", FrontendOptions::IK_OpenCL)
995       .Case("c++", FrontendOptions::IK_CXX)
996       .Case("objective-c", FrontendOptions::IK_ObjC)
997       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
998       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
999       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
1000       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
1001       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
1002       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
1003       .Case("c-header", FrontendOptions::IK_C)
1004       .Case("objective-c-header", FrontendOptions::IK_ObjC)
1005       .Case("c++-header", FrontendOptions::IK_CXX)
1006       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
1007       .Case("ast", FrontendOptions::IK_AST)
1008       .Default(FrontendOptions::IK_None);
1009     if (DashX == FrontendOptions::IK_None)
1010       Diags.Report(diag::err_drv_invalid_value)
1011         << A->getAsString(Args) << A->getValue(Args);
1012   }
1013 
1014   // '-' is the default input if none is given.
1015   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
1016   Opts.Inputs.clear();
1017   if (Inputs.empty())
1018     Inputs.push_back("-");
1019   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1020     FrontendOptions::InputKind IK = DashX;
1021     if (IK == FrontendOptions::IK_None) {
1022       IK = FrontendOptions::getInputKindForExtension(
1023         llvm::StringRef(Inputs[i]).rsplit('.').second);
1024       // FIXME: Remove this hack.
1025       if (i == 0)
1026         DashX = IK;
1027     }
1028     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1029   }
1030 
1031   return DashX;
1032 }
1033 
1034 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1035                                                  void *MainAddr) {
1036   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1037 
1038   if (!P.isEmpty()) {
1039     P.eraseComponent();  // Remove /clang from foo/bin/clang
1040     P.eraseComponent();  // Remove /bin   from foo/bin
1041 
1042     // Get foo/lib/clang/<version>/include
1043     P.appendComponent("lib");
1044     P.appendComponent("clang");
1045     P.appendComponent(CLANG_VERSION_STRING);
1046   }
1047 
1048   return P.str();
1049 }
1050 
1051 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1052   using namespace cc1options;
1053   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1054   Opts.Verbose = Args.hasArg(OPT_v);
1055   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1056   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1057   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1058   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1059 
1060   // Add -I... and -F... options in order.
1061   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1062          ie = Args.filtered_end(); it != ie; ++it)
1063     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1064                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1065 
1066   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1067   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1068   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1069                                              OPT_iwithprefixbefore),
1070          ie = Args.filtered_end(); it != ie; ++it) {
1071     if (it->getOption().matches(OPT_iprefix))
1072       Prefix = it->getValue(Args);
1073     else if (it->getOption().matches(OPT_iwithprefix))
1074       Opts.AddPath(Prefix.str() + it->getValue(Args),
1075                    frontend::System, false, false);
1076     else
1077       Opts.AddPath(Prefix.str() + it->getValue(Args),
1078                    frontend::Angled, false, false);
1079   }
1080 
1081   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1082          ie = Args.filtered_end(); it != ie; ++it)
1083     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1084   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1085          ie = Args.filtered_end(); it != ie; ++it)
1086     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1087   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1088          ie = Args.filtered_end(); it != ie; ++it)
1089     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1090 
1091   // FIXME: Need options for the various environment variables!
1092 }
1093 
1094 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1095                           FrontendOptions::InputKind IK,
1096                           Diagnostic &Diags) {
1097   // FIXME: Cleanup per-file based stuff.
1098 
1099   // Set some properties which depend soley on the input kind; it would be nice
1100   // to move these to the language standard, and have the driver resolve the
1101   // input kind + language standard.
1102   if (IK == FrontendOptions::IK_Asm) {
1103     Opts.AsmPreprocessor = 1;
1104   } else if (IK == FrontendOptions::IK_ObjC ||
1105              IK == FrontendOptions::IK_ObjCXX ||
1106              IK == FrontendOptions::IK_PreprocessedObjC ||
1107              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1108     Opts.ObjC1 = Opts.ObjC2 = 1;
1109   }
1110 
1111   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1112   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1113     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1114 #define LANGSTANDARD(id, name, desc, features) \
1115       .Case(name, LangStandard::lang_##id)
1116 #include "clang/Frontend/LangStandards.def"
1117       .Default(LangStandard::lang_unspecified);
1118     if (LangStd == LangStandard::lang_unspecified)
1119       Diags.Report(diag::err_drv_invalid_value)
1120         << A->getAsString(Args) << A->getValue(Args);
1121   }
1122 
1123   if (LangStd == LangStandard::lang_unspecified) {
1124     // Based on the base language, pick one.
1125     switch (IK) {
1126     case FrontendOptions::IK_None:
1127     case FrontendOptions::IK_AST:
1128       assert(0 && "Invalid input kind!");
1129     case FrontendOptions::IK_OpenCL:
1130       LangStd = LangStandard::lang_opencl;
1131       break;
1132     case FrontendOptions::IK_Asm:
1133     case FrontendOptions::IK_C:
1134     case FrontendOptions::IK_PreprocessedC:
1135     case FrontendOptions::IK_ObjC:
1136     case FrontendOptions::IK_PreprocessedObjC:
1137       LangStd = LangStandard::lang_gnu99;
1138       break;
1139     case FrontendOptions::IK_CXX:
1140     case FrontendOptions::IK_PreprocessedCXX:
1141     case FrontendOptions::IK_ObjCXX:
1142     case FrontendOptions::IK_PreprocessedObjCXX:
1143       LangStd = LangStandard::lang_gnucxx98;
1144       break;
1145     }
1146   }
1147 
1148   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1149   Opts.BCPLComment = Std.hasBCPLComments();
1150   Opts.C99 = Std.isC99();
1151   Opts.CPlusPlus = Std.isCPlusPlus();
1152   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1153   Opts.Digraphs = Std.hasDigraphs();
1154   Opts.GNUMode = Std.isGNUMode();
1155   Opts.GNUInline = !Std.isC99();
1156   Opts.HexFloats = Std.hasHexFloats();
1157   Opts.ImplicitInt = Std.hasImplicitInt();
1158 
1159   // OpenCL has some additional defaults.
1160   if (LangStd == LangStandard::lang_opencl) {
1161     Opts.OpenCL = 1;
1162     Opts.AltiVec = 1;
1163     Opts.CXXOperatorNames = 1;
1164     Opts.LaxVectorConversions = 1;
1165   }
1166 
1167   // OpenCL and C++ both have bool, true, false keywords.
1168   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1169 
1170   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1171   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1172   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1173   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1174   // name, as it doesn't seem a useful distinction.
1175   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1176                                   Opts.GNUMode);
1177 
1178   if (Opts.CPlusPlus)
1179     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1180 
1181   if (Args.hasArg(OPT_fobjc_gc_only))
1182     Opts.setGCMode(LangOptions::GCOnly);
1183   else if (Args.hasArg(OPT_fobjc_gc))
1184     Opts.setGCMode(LangOptions::HybridGC);
1185 
1186   if (Args.hasArg(OPT_print_ivar_layout))
1187     Opts.ObjCGCBitmapPrint = 1;
1188   if (Args.hasArg(OPT_fno_constant_cfstrings))
1189     Opts.NoConstantCFStrings = 1;
1190 
1191   if (Args.hasArg(OPT_faltivec))
1192     Opts.AltiVec = 1;
1193 
1194   if (Args.hasArg(OPT_pthread))
1195     Opts.POSIXThreads = 1;
1196 
1197   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1198                                         "default");
1199   if (Vis == "default")
1200     Opts.setVisibilityMode(LangOptions::Default);
1201   else if (Vis == "hidden")
1202     Opts.setVisibilityMode(LangOptions::Hidden);
1203   else if (Vis == "protected")
1204     Opts.setVisibilityMode(LangOptions::Protected);
1205   else
1206     Diags.Report(diag::err_drv_invalid_value)
1207       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1208 
1209   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1210 
1211   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1212   // is specified, or -std is set to a conforming mode.
1213   Opts.Trigraphs = !Opts.GNUMode;
1214   if (Args.hasArg(OPT_trigraphs))
1215     Opts.Trigraphs = 1;
1216 
1217   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1218                                    OPT_fno_dollars_in_identifiers,
1219                                    !Opts.AsmPreprocessor);
1220   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1221   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1222   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1223   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1224   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1225     Opts.LaxVectorConversions = 0;
1226   if (Args.hasArg(OPT_fno_threadsafe_statics))
1227     Opts.ThreadsafeStatics = 0;
1228   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1229   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1230   Opts.Blocks = Args.hasArg(OPT_fblocks);
1231   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1232   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1233   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1234   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1235   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1236   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1237   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1238   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1239   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1240   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1241                                                Diags);
1242   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1243   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1244                                                  OPT_fconstant_string_class);
1245   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1246   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1247   if (Opts.ObjCNonFragileABI2)
1248     Opts.ObjCNonFragileABI = true;
1249   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1250   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1251   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1252   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1253   Opts.Static = Args.hasArg(OPT_static_define);
1254   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1255   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1256   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1257   Opts.OptimizeSize = 0;
1258 
1259   // FIXME: Eliminate this dependency.
1260   unsigned Opt =
1261     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1262   Opts.Optimize = Opt != 0;
1263 
1264   // This is the __NO_INLINE__ define, which just depends on things like the
1265   // optimization level and -fno-inline, not actually whether the backend has
1266   // inlining enabled.
1267   //
1268   // FIXME: This is affected by other options (-fno-inline).
1269   Opts.NoInline = !Opt;
1270 
1271   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1272   switch (SSP) {
1273   default:
1274     Diags.Report(diag::err_drv_invalid_value)
1275       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1276     break;
1277   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1278   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1279   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1280   }
1281 }
1282 
1283 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1284                                   Diagnostic &Diags) {
1285   using namespace cc1options;
1286   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1287   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1288   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1289       Opts.TokenCache = A->getValue(Args);
1290   else
1291     Opts.TokenCache = Opts.ImplicitPTHInclude;
1292   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1293   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1294   // Add macros from the command line.
1295   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1296          ie = Args.filtered_end(); it != ie; ++it) {
1297     if (it->getOption().matches(OPT_D))
1298       Opts.addMacroDef(it->getValue(Args));
1299     else
1300       Opts.addMacroUndef(it->getValue(Args));
1301   }
1302 
1303   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1304 
1305   // Add the ordered list of -includes.
1306   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1307                                              OPT_include_pth),
1308          ie = Args.filtered_end(); it != ie; ++it) {
1309     // PCH is handled specially, we need to extra the original include path.
1310     if (it->getOption().matches(OPT_include_pch)) {
1311       std::string OriginalFile =
1312         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1313       if (OriginalFile.empty())
1314         continue;
1315 
1316       Opts.Includes.push_back(OriginalFile);
1317     } else
1318       Opts.Includes.push_back(it->getValue(Args));
1319   }
1320 
1321   // Include 'altivec.h' if -faltivec option present
1322   if (Args.hasArg(OPT_faltivec))
1323     Opts.Includes.push_back("altivec.h");
1324 
1325   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1326          ie = Args.filtered_end(); it != ie; ++it) {
1327     std::pair<llvm::StringRef,llvm::StringRef> Split =
1328       llvm::StringRef(it->getValue(Args)).split(';');
1329 
1330     if (Split.second.empty()) {
1331       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1332       continue;
1333     }
1334 
1335     Opts.addRemappedFile(Split.first, Split.second);
1336   }
1337 }
1338 
1339 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1340                                         ArgList &Args) {
1341   using namespace cc1options;
1342   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1343   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1344   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1345   Opts.ShowComments = Args.hasArg(OPT_C);
1346   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1347 }
1348 
1349 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1350   using namespace cc1options;
1351   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1352   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1353   Opts.Triple = getLastArgValue(Args, OPT_triple);
1354   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1355 
1356   // Use the host triple if unspecified.
1357   if (Opts.Triple.empty())
1358     Opts.Triple = llvm::sys::getHostTriple();
1359 }
1360 
1361 //
1362 
1363 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1364                                         const char **ArgBegin,
1365                                         const char **ArgEnd,
1366                                         Diagnostic &Diags) {
1367   // Parse the arguments.
1368   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1369   unsigned MissingArgIndex, MissingArgCount;
1370   llvm::OwningPtr<InputArgList> Args(
1371     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1372 
1373   // Check for missing argument error.
1374   if (MissingArgCount)
1375     Diags.Report(diag::err_drv_missing_argument)
1376       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1377 
1378   // Issue errors on unknown arguments.
1379   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1380          ie = Args->filtered_end(); it != ie; ++it)
1381     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1382 
1383   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1384   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1385   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1386   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1387   FrontendOptions::InputKind DashX =
1388     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1389   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1390   if (DashX != FrontendOptions::IK_AST)
1391     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1392   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1393   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1394   ParseTargetArgs(Res.getTargetOpts(), *Args);
1395 }
1396