xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 76fa840d0990314d1d1c160803ba9d014a6c01a9) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/PCHReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // VerifyModule is only derived.
149   // Inlining is only derived.
150 
151   if (Opts.DataSections)
152     Res.push_back("-fdata-sections");
153   if (Opts.FunctionSections)
154     Res.push_back("-ffunction-sections");
155   if (Opts.AsmVerbose)
156     Res.push_back("-masm-verbose");
157   if (!Opts.CodeModel.empty()) {
158     Res.push_back("-mcode-model");
159     Res.push_back(Opts.CodeModel);
160   }
161   if (!Opts.CXAAtExit)
162     Res.push_back("-fno-use-cxa-atexit");
163   if (Opts.CXXCtorDtorAliases)
164     Res.push_back("-mconstructor-aliases");
165   if (!Opts.DebugPass.empty()) {
166     Res.push_back("-mdebug-pass");
167     Res.push_back(Opts.DebugPass);
168   }
169   if (Opts.DisableFPElim)
170     Res.push_back("-mdisable-fp-elim");
171   if (!Opts.FloatABI.empty()) {
172     Res.push_back("-mfloat-abi");
173     Res.push_back(Opts.FloatABI);
174   }
175   if (!Opts.LimitFloatPrecision.empty()) {
176     Res.push_back("-mlimit-float-precision");
177     Res.push_back(Opts.LimitFloatPrecision);
178   }
179   if (Opts.NoZeroInitializedInBSS)
180     Res.push_back("-mno-zero-initialized-bss");
181   if (Opts.ObjCLegacyDispatch)
182     Res.push_back("-fobjc-legacy-dispatch");
183   if (Opts.SoftFloat)
184     Res.push_back("-msoft-float");
185   if (Opts.UnwindTables)
186     Res.push_back("-munwind-tables");
187   if (Opts.RelocationModel != "pic") {
188     Res.push_back("-mrelocation-model");
189     Res.push_back(Opts.RelocationModel);
190   }
191   if (!Opts.VerifyModule)
192     Res.push_back("-disable-llvm-verifier");
193 }
194 
195 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
196                                        std::vector<std::string> &Res) {
197   if (Opts.IncludeSystemHeaders)
198     Res.push_back("-sys-header-deps");
199   if (Opts.UsePhonyTargets)
200     Res.push_back("-MP");
201   if (!Opts.OutputFile.empty()) {
202     Res.push_back("-dependency-file");
203     Res.push_back(Opts.OutputFile);
204   }
205   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
206     Res.push_back("-MT");
207     Res.push_back(Opts.Targets[i]);
208   }
209 }
210 
211 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
212                                  std::vector<std::string> &Res) {
213   if (Opts.IgnoreWarnings)
214     Res.push_back("-w");
215   if (Opts.NoRewriteMacros)
216     Res.push_back("-Wno-rewrite-macros");
217   if (Opts.Pedantic)
218     Res.push_back("-pedantic");
219   if (Opts.PedanticErrors)
220     Res.push_back("-pedantic-errors");
221   if (!Opts.ShowColumn)
222     Res.push_back("-fno-show-column");
223   if (!Opts.ShowLocation)
224     Res.push_back("-fno-show-source-location");
225   if (!Opts.ShowCarets)
226     Res.push_back("-fno-caret-diagnostics");
227   if (!Opts.ShowFixits)
228     Res.push_back("-fno-diagnostics-fixit-info");
229   if (Opts.ShowSourceRanges)
230     Res.push_back("-fdiagnostics-print-source-range-info");
231   if (Opts.ShowColors)
232     Res.push_back("-fcolor-diagnostics");
233   if (Opts.VerifyDiagnostics)
234     Res.push_back("-verify");
235   if (Opts.BinaryOutput)
236     Res.push_back("-fdiagnostics-binary");
237   if (Opts.ShowOptionNames)
238     Res.push_back("-fdiagnostics-show-option");
239   if (Opts.ErrorLimit) {
240     Res.push_back("-ferror-limit");
241     Res.push_back(llvm::utostr(Opts.ErrorLimit));
242   }
243   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
244     Res.push_back("-ftabstop");
245     Res.push_back(llvm::utostr(Opts.TabStop));
246   }
247   if (Opts.MessageLength) {
248     Res.push_back("-fmessage-length");
249     Res.push_back(llvm::utostr(Opts.MessageLength));
250   }
251   if (!Opts.DumpBuildInformation.empty()) {
252     Res.push_back("-dump-build-information");
253     Res.push_back(Opts.DumpBuildInformation);
254   }
255   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
256     Res.push_back("-W" + Opts.Warnings[i]);
257 }
258 
259 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
260   switch (Kind) {
261   case FrontendOptions::IK_None:              break;
262   case FrontendOptions::IK_AST:               return "ast";
263   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
264   case FrontendOptions::IK_C:                 return "c";
265   case FrontendOptions::IK_CXX:               return "c++";
266   case FrontendOptions::IK_ObjC:              return "objective-c";
267   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
268   case FrontendOptions::IK_OpenCL:            return "cl";
269   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
270   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
271   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
272   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
273   }
274 
275   llvm_unreachable("Unexpected language kind!");
276   return 0;
277 }
278 
279 static const char *getActionName(frontend::ActionKind Kind) {
280   switch (Kind) {
281   case frontend::PluginAction:
282   case frontend::InheritanceView:
283     llvm_unreachable("Invalid kind!");
284 
285   case frontend::ASTDump:                return "-ast-dump";
286   case frontend::ASTPrint:               return "-ast-print";
287   case frontend::ASTPrintXML:            return "-ast-print-xml";
288   case frontend::ASTView:                return "-ast-view";
289   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
290   case frontend::DumpTokens:             return "-dump-tokens";
291   case frontend::EmitAssembly:           return "-S";
292   case frontend::EmitBC:                 return "-emit-llvm-bc";
293   case frontend::EmitHTML:               return "-emit-html";
294   case frontend::EmitLLVM:               return "-emit-llvm";
295   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
296   case frontend::EmitObj:                return "-emit-obj";
297   case frontend::FixIt:                  return "-fixit";
298   case frontend::GeneratePCH:            return "-emit-pch";
299   case frontend::GeneratePTH:            return "-emit-pth";
300   case frontend::InitOnly:               return "-init-only";
301   case frontend::ParseNoop:              return "-parse-noop";
302   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
303   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
304   case frontend::PrintDeclContext:       return "-print-decl-contexts";
305   case frontend::PrintPreprocessedInput: return "-E";
306   case frontend::RewriteMacros:          return "-rewrite-macros";
307   case frontend::RewriteObjC:            return "-rewrite-objc";
308   case frontend::RewriteTest:            return "-rewrite-test";
309   case frontend::RunAnalysis:            return "-analyze";
310   case frontend::RunPreprocessorOnly:    return "-Eonly";
311   }
312 
313   llvm_unreachable("Unexpected language kind!");
314   return 0;
315 }
316 
317 static void FrontendOptsToArgs(const FrontendOptions &Opts,
318                                std::vector<std::string> &Res) {
319   if (!Opts.DebugCodeCompletionPrinter)
320     Res.push_back("-no-code-completion-debug-printer");
321   if (Opts.DisableFree)
322     Res.push_back("-disable-free");
323   if (Opts.RelocatablePCH)
324     Res.push_back("-relocatable-pch");
325   if (Opts.ShowHelp)
326     Res.push_back("-help");
327   if (Opts.ShowMacrosInCodeCompletion)
328     Res.push_back("-code-completion-macros");
329   if (Opts.ShowStats)
330     Res.push_back("-print-stats");
331   if (Opts.ShowTimers)
332     Res.push_back("-ftime-report");
333   if (Opts.ShowVersion)
334     Res.push_back("-version");
335 
336   bool NeedLang = false;
337   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
338     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
339         Opts.Inputs[i].first)
340       NeedLang = true;
341   if (NeedLang) {
342     Res.push_back("-x");
343     Res.push_back(getInputKindName(Opts.Inputs[0].first));
344   }
345   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
346     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
347            "Unable to represent this input vector!");
348     Res.push_back(Opts.Inputs[i].second);
349   }
350 
351   if (!Opts.OutputFile.empty()) {
352     Res.push_back("-o");
353     Res.push_back(Opts.OutputFile);
354   }
355   if (!Opts.ViewClassInheritance.empty()) {
356     Res.push_back("-cxx-inheritance-view");
357     Res.push_back(Opts.ViewClassInheritance);
358   }
359   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
360     Res.push_back("-fixit-at");
361     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
362                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
363                   llvm::utostr(Opts.FixItLocations[i].Column));
364   }
365   if (!Opts.CodeCompletionAt.FileName.empty()) {
366     Res.push_back("-code-completion-at");
367     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
368                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
369                   llvm::utostr(Opts.CodeCompletionAt.Column));
370   }
371   if (Opts.ProgramAction != frontend::InheritanceView &&
372       Opts.ProgramAction != frontend::PluginAction)
373     Res.push_back(getActionName(Opts.ProgramAction));
374   if (!Opts.ActionName.empty()) {
375     Res.push_back("-plugin");
376     Res.push_back(Opts.ActionName);
377   }
378   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
379     Res.push_back("-load");
380     Res.push_back(Opts.Plugins[i]);
381   }
382   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
383     Res.push_back("-ast-merge");
384     Res.push_back(Opts.ASTMergeFiles[i]);
385   }
386   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
387     Res.push_back("-mllvm");
388     Res.push_back(Opts.LLVMArgs[i]);
389   }
390 }
391 
392 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
393                                    std::vector<std::string> &Res) {
394   if (Opts.Sysroot != "/") {
395     Res.push_back("-isysroot");
396     Res.push_back(Opts.Sysroot);
397   }
398 
399   /// User specified include entries.
400   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
401     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
402     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
403       llvm::report_fatal_error("Invalid option set!");
404     if (E.IsUserSupplied) {
405       if (E.Group == frontend::After) {
406         Res.push_back("-idirafter");
407       } else if (E.Group == frontend::Quoted) {
408         Res.push_back("-iquote");
409       } else if (E.Group == frontend::System) {
410         Res.push_back("-isystem");
411       } else {
412         assert(E.Group == frontend::Angled && "Invalid group!");
413         Res.push_back(E.IsFramework ? "-F" : "-I");
414       }
415     } else {
416       if (E.Group != frontend::Angled && E.Group != frontend::System)
417         llvm::report_fatal_error("Invalid option set!");
418       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
419                     "-iwithprefix");
420     }
421     Res.push_back(E.Path);
422   }
423 
424   if (!Opts.EnvIncPath.empty()) {
425     // FIXME: Provide an option for this, and move env detection to driver.
426     llvm::report_fatal_error("Not yet implemented!");
427   }
428   if (!Opts.CEnvIncPath.empty()) {
429     // FIXME: Provide an option for this, and move env detection to driver.
430     llvm::report_fatal_error("Not yet implemented!");
431   }
432   if (!Opts.ObjCEnvIncPath.empty()) {
433     // FIXME: Provide an option for this, and move env detection to driver.
434     llvm::report_fatal_error("Not yet implemented!");
435   }
436   if (!Opts.CXXEnvIncPath.empty()) {
437     // FIXME: Provide an option for this, and move env detection to driver.
438     llvm::report_fatal_error("Not yet implemented!");
439   }
440   if (!Opts.ObjCXXEnvIncPath.empty()) {
441     // FIXME: Provide an option for this, and move env detection to driver.
442     llvm::report_fatal_error("Not yet implemented!");
443   }
444   if (!Opts.ResourceDir.empty()) {
445     Res.push_back("-resource-dir");
446     Res.push_back(Opts.ResourceDir);
447   }
448   if (!Opts.UseStandardIncludes)
449     Res.push_back("-nostdinc");
450   if (!Opts.UseStandardCXXIncludes)
451     Res.push_back("-nostdinc++");
452   if (Opts.Verbose)
453     Res.push_back("-v");
454 }
455 
456 static void LangOptsToArgs(const LangOptions &Opts,
457                            std::vector<std::string> &Res) {
458   LangOptions DefaultLangOpts;
459 
460   // FIXME: Need to set -std to get all the implicit options.
461 
462   // FIXME: We want to only pass options relative to the defaults, which
463   // requires constructing a target. :(
464   //
465   // It would be better to push the all target specific choices into the driver,
466   // so that everything below that was more uniform.
467 
468   if (Opts.Trigraphs)
469     Res.push_back("-trigraphs");
470   // Implicit based on the input kind:
471   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
472   // Implicit based on the input language standard:
473   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
474   if (Opts.DollarIdents)
475     Res.push_back("-fdollars-in-identifiers");
476   if (Opts.Microsoft)
477     Res.push_back("-fms-extensions");
478   if (Opts.ObjCNonFragileABI)
479     Res.push_back("-fobjc-nonfragile-abi");
480   if (Opts.ObjCNonFragileABI2)
481     Res.push_back("-fobjc-nonfragile-abi2");
482   // NoInline is implicit.
483   if (!Opts.CXXOperatorNames)
484     Res.push_back("-fno-operator-names");
485   if (Opts.PascalStrings)
486     Res.push_back("-fpascal-strings");
487   if (Opts.CatchUndefined)
488     Res.push_back("-fcatch-undefined-behavior");
489   if (Opts.WritableStrings)
490     Res.push_back("-fwritable-strings");
491   if (Opts.ConstStrings)
492     Res.push_back("-Wwrite-strings");
493   if (!Opts.LaxVectorConversions)
494     Res.push_back("-fno-lax-vector-conversions");
495   if (Opts.AltiVec)
496     Res.push_back("-faltivec");
497   if (Opts.Exceptions)
498     Res.push_back("-fexceptions");
499   if (Opts.SjLjExceptions)
500     Res.push_back("-fsjlj-exceptions");
501   if (!Opts.RTTI)
502     Res.push_back("-fno-rtti");
503   if (!Opts.NeXTRuntime)
504     Res.push_back("-fgnu-runtime");
505   if (Opts.Freestanding)
506     Res.push_back("-ffreestanding");
507   if (Opts.NoBuiltin)
508     Res.push_back("-fno-builtin");
509   if (!Opts.AssumeSaneOperatorNew)
510     Res.push_back("-fno-assume-sane-operator-new");
511   if (!Opts.ThreadsafeStatics)
512     Res.push_back("-fno-threadsafe-statics");
513   if (Opts.POSIXThreads)
514     Res.push_back("-pthread");
515   if (Opts.Blocks)
516     Res.push_back("-fblocks");
517   if (Opts.EmitAllDecls)
518     Res.push_back("-femit-all-decls");
519   if (Opts.MathErrno)
520     Res.push_back("-fmath-errno");
521   if (Opts.OverflowChecking)
522     Res.push_back("-ftrapv");
523   if (Opts.HeinousExtensions)
524     Res.push_back("-fheinous-gnu-extensions");
525   // Optimize is implicit.
526   // OptimizeSize is implicit.
527   if (Opts.Static)
528     Res.push_back("-static-define");
529   if (Opts.PICLevel) {
530     Res.push_back("-pic-level");
531     Res.push_back(llvm::utostr(Opts.PICLevel));
532   }
533   if (Opts.ObjCGCBitmapPrint)
534     Res.push_back("-print-ivar-layout");
535   if (!Opts.AccessControl)
536     Res.push_back("-fno-access-control");
537   if (!Opts.CharIsSigned)
538     Res.push_back("-fno-signed-char");
539   if (Opts.ShortWChar)
540     Res.push_back("-fshort-wchar");
541   if (!Opts.ElideConstructors)
542     Res.push_back("-fno-elide-constructors");
543   if (Opts.getGCMode() != LangOptions::NonGC) {
544     if (Opts.getGCMode() == LangOptions::HybridGC) {
545       Res.push_back("-fobjc-gc");
546     } else {
547       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
548       Res.push_back("-fobjc-gc-only");
549     }
550   }
551   if (Opts.getVisibilityMode() != LangOptions::Default) {
552     Res.push_back("-fvisibility");
553     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
554       Res.push_back("hidden");
555     } else {
556       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
557              "Invalid visibility!");
558       Res.push_back("protected");
559     }
560   }
561   if (Opts.getStackProtectorMode() != 0) {
562     Res.push_back("-stack-protector");
563     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
564   }
565   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
566     Res.push_back("-ftemplate-depth");
567     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
568   }
569   if (!Opts.ObjCConstantStringClass.empty()) {
570     Res.push_back("-fconstant-string-class");
571     Res.push_back(Opts.ObjCConstantStringClass);
572   }
573 }
574 
575 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
576                                    std::vector<std::string> &Res) {
577   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
578     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
579                   Opts.Macros[i].first);
580   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
581     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
582     Res.push_back("-include");
583     Res.push_back(Opts.Includes[i]);
584   }
585   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
586     Res.push_back("-imacros");
587     Res.push_back(Opts.MacroIncludes[i]);
588   }
589   if (!Opts.UsePredefines)
590     Res.push_back("-undef");
591   if (Opts.DetailedRecord)
592     Res.push_back("-detailed-preprocessing-record");
593   if (!Opts.ImplicitPCHInclude.empty()) {
594     Res.push_back("-include-pch");
595     Res.push_back(Opts.ImplicitPCHInclude);
596   }
597   if (!Opts.ImplicitPTHInclude.empty()) {
598     Res.push_back("-include-pth");
599     Res.push_back(Opts.ImplicitPTHInclude);
600   }
601   if (!Opts.TokenCache.empty()) {
602     if (Opts.ImplicitPTHInclude.empty()) {
603       Res.push_back("-token-cache");
604       Res.push_back(Opts.TokenCache);
605     } else
606       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
607              "Unsupported option combination!");
608   }
609   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
610     Res.push_back("-remap-file");
611     Res.push_back(Opts.RemappedFiles[i].first + ";" +
612                   Opts.RemappedFiles[i].second);
613   }
614 }
615 
616 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
617                                          std::vector<std::string> &Res) {
618   if (!Opts.ShowCPP && !Opts.ShowMacros)
619     llvm::report_fatal_error("Invalid option combination!");
620 
621   if (Opts.ShowCPP && Opts.ShowMacros)
622     Res.push_back("-dD");
623   else if (!Opts.ShowCPP && Opts.ShowMacros)
624     Res.push_back("-dM");
625 
626   if (!Opts.ShowLineMarkers)
627     Res.push_back("-P");
628   if (Opts.ShowComments)
629     Res.push_back("-C");
630   if (Opts.ShowMacroComments)
631     Res.push_back("-CC");
632 }
633 
634 static void TargetOptsToArgs(const TargetOptions &Opts,
635                              std::vector<std::string> &Res) {
636   Res.push_back("-triple");
637   Res.push_back(Opts.Triple);
638   if (!Opts.CPU.empty()) {
639     Res.push_back("-target-cpu");
640     Res.push_back(Opts.CPU);
641   }
642   if (!Opts.ABI.empty()) {
643     Res.push_back("-target-abi");
644     Res.push_back(Opts.ABI);
645   }
646   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
647     Res.push_back("-target-feature");
648     Res.push_back(Opts.Features[i]);
649   }
650 }
651 
652 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
653   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
654   CodeGenOptsToArgs(getCodeGenOpts(), Res);
655   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
656   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
657   FrontendOptsToArgs(getFrontendOpts(), Res);
658   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
659   LangOptsToArgs(getLangOpts(), Res);
660   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
661   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
662   TargetOptsToArgs(getTargetOpts(), Res);
663 }
664 
665 //===----------------------------------------------------------------------===//
666 // Deserialization (to args)
667 //===----------------------------------------------------------------------===//
668 
669 using namespace clang::driver;
670 using namespace clang::driver::cc1options;
671 
672 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
673                                        llvm::StringRef Default = "") {
674   if (Arg *A = Args.getLastArg(ID))
675     return A->getValue(Args);
676   return Default;
677 }
678 
679 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
680                               int Default, Diagnostic &Diags) {
681   Arg *A = Args.getLastArg(ID);
682   if (!A)
683     return Default;
684 
685   int Res = Default;
686   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
687     Diags.Report(diag::err_drv_invalid_int_value)
688         << A->getAsString(Args) << A->getValue(Args);
689 
690   return Res;
691 }
692 
693 static std::vector<std::string>
694 getAllArgValues(ArgList &Args, cc1options::ID ID) {
695   llvm::SmallVector<const char *, 16> Values;
696   Args.AddAllArgValues(Values, ID);
697   return std::vector<std::string>(Values.begin(), Values.end());
698 }
699 
700 //
701 
702 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
703                               Diagnostic &Diags) {
704   using namespace cc1options;
705 
706   Opts.AnalysisList.clear();
707 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
708   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
709 #include "clang/Frontend/Analyses.def"
710 
711   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
712     llvm::StringRef Name = A->getValue(Args);
713     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
714 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
715       .Case(CMDFLAG, NAME##Model)
716 #include "clang/Frontend/Analyses.def"
717       .Default(NumStores);
718     // FIXME: Error handling.
719     if (Value == NumStores)
720       Diags.Report(diag::err_drv_invalid_value)
721         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
722     else
723       Opts.AnalysisStoreOpt = Value;
724   }
725 
726   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
727     llvm::StringRef Name = A->getValue(Args);
728     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
729 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
730       .Case(CMDFLAG, NAME##Model)
731 #include "clang/Frontend/Analyses.def"
732       .Default(NumConstraints);
733     // FIXME: Error handling.
734     if (Value == NumConstraints)
735       Diags.Report(diag::err_drv_invalid_value)
736         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
737     else
738       Opts.AnalysisConstraintsOpt = Value;
739   }
740 
741   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
742     llvm::StringRef Name = A->getValue(Args);
743     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
744 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
745       .Case(CMDFLAG, PD_##NAME)
746 #include "clang/Frontend/Analyses.def"
747       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
748     // FIXME: Error handling.
749     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
750       Diags.Report(diag::err_drv_invalid_value)
751         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
752     else
753       Opts.AnalysisDiagOpt = Value;
754   }
755 
756   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
757   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
758   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
759   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
760   Opts.AnalyzeNestedBlocks =
761     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
762   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
763   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
764   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
765   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
766   Opts.EnableExperimentalInternalChecks =
767     Args.hasArg(OPT_analyzer_experimental_internal_checks);
768   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
769   Opts.MaxNodes = getLastArgIntValue(Args, OPT_analyzer_max_nodes,150000,Diags);
770 }
771 
772 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
773                              Diagnostic &Diags) {
774   using namespace cc1options;
775   // -Os implies -O2
776   if (Args.hasArg(OPT_Os))
777     Opts.OptimizationLevel = 2;
778   else {
779     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
780     if (Opts.OptimizationLevel > 3) {
781       Diags.Report(diag::err_drv_invalid_value)
782         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
783       Opts.OptimizationLevel = 3;
784     }
785   }
786 
787   // We must always run at least the always inlining pass.
788   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
789     : CodeGenOptions::OnlyAlwaysInlining;
790 
791   Opts.DebugInfo = Args.hasArg(OPT_g);
792   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
793   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
794   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
795   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
796   Opts.NoCommon = Args.hasArg(OPT_fno_common);
797   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
798   Opts.OptimizeSize = Args.hasArg(OPT_Os);
799   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
800 
801   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
802   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
803   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
804   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
805   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
806   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
807   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
808   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
809   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
810   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
811   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
812   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
813   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
814 
815   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
816   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
817 
818   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
819   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
820 }
821 
822 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
823                                       ArgList &Args) {
824   using namespace cc1options;
825   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
826   Opts.Targets = getAllArgValues(Args, OPT_MT);
827   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
828   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
829 }
830 
831 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
832                                 Diagnostic &Diags) {
833   using namespace cc1options;
834   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
835   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
836   Opts.Pedantic = Args.hasArg(OPT_pedantic);
837   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
838   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
839   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
840   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
841   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
842   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
843   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
844   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
845   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
846   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
847   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
848   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
849                                     DiagnosticOptions::DefaultTabStop, Diags);
850   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
851     Diags.Report(diag::warn_ignoring_ftabstop_value)
852       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
853     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
854   }
855   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
856   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
857   Opts.Warnings = getAllArgValues(Args, OPT_W);
858 }
859 
860 static FrontendOptions::InputKind
861 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
862   using namespace cc1options;
863   Opts.ProgramAction = frontend::ParseSyntaxOnly;
864   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
865     switch (A->getOption().getID()) {
866     default:
867       assert(0 && "Invalid option in group!");
868     case OPT_ast_dump:
869       Opts.ProgramAction = frontend::ASTDump; break;
870     case OPT_ast_print:
871       Opts.ProgramAction = frontend::ASTPrint; break;
872     case OPT_ast_print_xml:
873       Opts.ProgramAction = frontend::ASTPrintXML; break;
874     case OPT_ast_view:
875       Opts.ProgramAction = frontend::ASTView; break;
876     case OPT_dump_raw_tokens:
877       Opts.ProgramAction = frontend::DumpRawTokens; break;
878     case OPT_dump_tokens:
879       Opts.ProgramAction = frontend::DumpTokens; break;
880     case OPT_S:
881       Opts.ProgramAction = frontend::EmitAssembly; break;
882     case OPT_emit_llvm_bc:
883       Opts.ProgramAction = frontend::EmitBC; break;
884     case OPT_emit_html:
885       Opts.ProgramAction = frontend::EmitHTML; break;
886     case OPT_emit_llvm:
887       Opts.ProgramAction = frontend::EmitLLVM; break;
888     case OPT_emit_llvm_only:
889       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
890     case OPT_emit_obj:
891       Opts.ProgramAction = frontend::EmitObj; break;
892     case OPT_fixit:
893       Opts.ProgramAction = frontend::FixIt; break;
894     case OPT_emit_pch:
895       Opts.ProgramAction = frontend::GeneratePCH; break;
896     case OPT_emit_pth:
897       Opts.ProgramAction = frontend::GeneratePTH; break;
898     case OPT_init_only:
899       Opts.ProgramAction = frontend::InitOnly; break;
900     case OPT_parse_noop:
901       Opts.ProgramAction = frontend::ParseNoop; break;
902     case OPT_parse_print_callbacks:
903       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
904     case OPT_fsyntax_only:
905       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
906     case OPT_print_decl_contexts:
907       Opts.ProgramAction = frontend::PrintDeclContext; break;
908     case OPT_E:
909       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
910     case OPT_rewrite_macros:
911       Opts.ProgramAction = frontend::RewriteMacros; break;
912     case OPT_rewrite_objc:
913       Opts.ProgramAction = frontend::RewriteObjC; break;
914     case OPT_rewrite_test:
915       Opts.ProgramAction = frontend::RewriteTest; break;
916     case OPT_analyze:
917       Opts.ProgramAction = frontend::RunAnalysis; break;
918     case OPT_Eonly:
919       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
920     }
921   }
922   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
923     Opts.ProgramAction = frontend::PluginAction;
924     Opts.ActionName = A->getValue(Args);
925   }
926 
927   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
928     Opts.CodeCompletionAt =
929       ParsedSourceLocation::FromString(A->getValue(Args));
930     if (Opts.CodeCompletionAt.FileName.empty())
931       Diags.Report(diag::err_drv_invalid_value)
932         << A->getAsString(Args) << A->getValue(Args);
933   }
934   Opts.DebugCodeCompletionPrinter =
935     !Args.hasArg(OPT_no_code_completion_debug_printer);
936   Opts.DisableFree = Args.hasArg(OPT_disable_free);
937 
938   Opts.FixItLocations.clear();
939   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
940          ie = Args.filtered_end(); it != ie; ++it) {
941     const char *Loc = it->getValue(Args);
942     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
943 
944     if (PSL.FileName.empty()) {
945       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
946       continue;
947     }
948 
949     Opts.FixItLocations.push_back(PSL);
950   }
951 
952   Opts.OutputFile = getLastArgValue(Args, OPT_o);
953   Opts.Plugins = getAllArgValues(Args, OPT_load);
954   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
955   Opts.ShowHelp = Args.hasArg(OPT_help);
956   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
957   Opts.ShowStats = Args.hasArg(OPT_print_stats);
958   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
959   Opts.ShowVersion = Args.hasArg(OPT_version);
960   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
961   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
962   Opts.LLVMArgs = getAllArgValues(Args, OPT_mllvm);
963 
964   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
965   if (const Arg *A = Args.getLastArg(OPT_x)) {
966     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
967       .Case("c", FrontendOptions::IK_C)
968       .Case("cl", FrontendOptions::IK_OpenCL)
969       .Case("c", FrontendOptions::IK_C)
970       .Case("cl", FrontendOptions::IK_OpenCL)
971       .Case("c++", FrontendOptions::IK_CXX)
972       .Case("objective-c", FrontendOptions::IK_ObjC)
973       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
974       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
975       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
976       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
977       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
978       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
979       .Case("c-header", FrontendOptions::IK_C)
980       .Case("objective-c-header", FrontendOptions::IK_ObjC)
981       .Case("c++-header", FrontendOptions::IK_CXX)
982       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
983       .Case("ast", FrontendOptions::IK_AST)
984       .Default(FrontendOptions::IK_None);
985     if (DashX == FrontendOptions::IK_None)
986       Diags.Report(diag::err_drv_invalid_value)
987         << A->getAsString(Args) << A->getValue(Args);
988   }
989 
990   // '-' is the default input if none is given.
991   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
992   Opts.Inputs.clear();
993   if (Inputs.empty())
994     Inputs.push_back("-");
995   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
996     FrontendOptions::InputKind IK = DashX;
997     if (IK == FrontendOptions::IK_None) {
998       IK = FrontendOptions::getInputKindForExtension(
999         llvm::StringRef(Inputs[i]).rsplit('.').second);
1000       // FIXME: Remove this hack.
1001       if (i == 0)
1002         DashX = IK;
1003     }
1004     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1005   }
1006 
1007   return DashX;
1008 }
1009 
1010 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1011                                                  void *MainAddr) {
1012   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1013 
1014   if (!P.isEmpty()) {
1015     P.eraseComponent();  // Remove /clang from foo/bin/clang
1016     P.eraseComponent();  // Remove /bin   from foo/bin
1017 
1018     // Get foo/lib/clang/<version>/include
1019     P.appendComponent("lib");
1020     P.appendComponent("clang");
1021     P.appendComponent(CLANG_VERSION_STRING);
1022   }
1023 
1024   return P.str();
1025 }
1026 
1027 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1028   using namespace cc1options;
1029   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1030   Opts.Verbose = Args.hasArg(OPT_v);
1031   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1032   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1033   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1034   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1035 
1036   // Add -I... and -F... options in order.
1037   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1038          ie = Args.filtered_end(); it != ie; ++it)
1039     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1040                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1041 
1042   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1043   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1044   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1045                                              OPT_iwithprefixbefore),
1046          ie = Args.filtered_end(); it != ie; ++it) {
1047     if (it->getOption().matches(OPT_iprefix))
1048       Prefix = it->getValue(Args);
1049     else if (it->getOption().matches(OPT_iwithprefix))
1050       Opts.AddPath(Prefix.str() + it->getValue(Args),
1051                    frontend::System, false, false);
1052     else
1053       Opts.AddPath(Prefix.str() + it->getValue(Args),
1054                    frontend::Angled, false, false);
1055   }
1056 
1057   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1058          ie = Args.filtered_end(); it != ie; ++it)
1059     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1060   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1061          ie = Args.filtered_end(); it != ie; ++it)
1062     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1063   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1064          ie = Args.filtered_end(); it != ie; ++it)
1065     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1066 
1067   // FIXME: Need options for the various environment variables!
1068 }
1069 
1070 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1071                           FrontendOptions::InputKind IK,
1072                           Diagnostic &Diags) {
1073   // FIXME: Cleanup per-file based stuff.
1074 
1075   // Set some properties which depend soley on the input kind; it would be nice
1076   // to move these to the language standard, and have the driver resolve the
1077   // input kind + language standard.
1078   if (IK == FrontendOptions::IK_Asm) {
1079     Opts.AsmPreprocessor = 1;
1080   } else if (IK == FrontendOptions::IK_ObjC ||
1081              IK == FrontendOptions::IK_ObjCXX ||
1082              IK == FrontendOptions::IK_PreprocessedObjC ||
1083              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1084     Opts.ObjC1 = Opts.ObjC2 = 1;
1085   }
1086 
1087   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1088   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1089     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1090 #define LANGSTANDARD(id, name, desc, features) \
1091       .Case(name, LangStandard::lang_##id)
1092 #include "clang/Frontend/LangStandards.def"
1093       .Default(LangStandard::lang_unspecified);
1094     if (LangStd == LangStandard::lang_unspecified)
1095       Diags.Report(diag::err_drv_invalid_value)
1096         << A->getAsString(Args) << A->getValue(Args);
1097   }
1098 
1099   if (LangStd == LangStandard::lang_unspecified) {
1100     // Based on the base language, pick one.
1101     switch (IK) {
1102     case FrontendOptions::IK_None:
1103     case FrontendOptions::IK_AST:
1104       assert(0 && "Invalid input kind!");
1105     case FrontendOptions::IK_OpenCL:
1106       LangStd = LangStandard::lang_opencl;
1107       break;
1108     case FrontendOptions::IK_Asm:
1109     case FrontendOptions::IK_C:
1110     case FrontendOptions::IK_PreprocessedC:
1111     case FrontendOptions::IK_ObjC:
1112     case FrontendOptions::IK_PreprocessedObjC:
1113       LangStd = LangStandard::lang_gnu99;
1114       break;
1115     case FrontendOptions::IK_CXX:
1116     case FrontendOptions::IK_PreprocessedCXX:
1117     case FrontendOptions::IK_ObjCXX:
1118     case FrontendOptions::IK_PreprocessedObjCXX:
1119       LangStd = LangStandard::lang_gnucxx98;
1120       break;
1121     }
1122   }
1123 
1124   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1125   Opts.BCPLComment = Std.hasBCPLComments();
1126   Opts.C99 = Std.isC99();
1127   Opts.CPlusPlus = Std.isCPlusPlus();
1128   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1129   Opts.Digraphs = Std.hasDigraphs();
1130   Opts.GNUMode = Std.isGNUMode();
1131   Opts.GNUInline = !Std.isC99();
1132   Opts.HexFloats = Std.hasHexFloats();
1133   Opts.ImplicitInt = Std.hasImplicitInt();
1134 
1135   // OpenCL has some additional defaults.
1136   if (LangStd == LangStandard::lang_opencl) {
1137     Opts.OpenCL = 1;
1138     Opts.AltiVec = 1;
1139     Opts.CXXOperatorNames = 1;
1140     Opts.LaxVectorConversions = 1;
1141   }
1142 
1143   // OpenCL and C++ both have bool, true, false keywords.
1144   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1145 
1146   if (Opts.CPlusPlus)
1147     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1148 
1149   if (Args.hasArg(OPT_fobjc_gc_only))
1150     Opts.setGCMode(LangOptions::GCOnly);
1151   else if (Args.hasArg(OPT_fobjc_gc))
1152     Opts.setGCMode(LangOptions::HybridGC);
1153 
1154   if (Args.hasArg(OPT_print_ivar_layout))
1155     Opts.ObjCGCBitmapPrint = 1;
1156 
1157   if (Args.hasArg(OPT_faltivec))
1158     Opts.AltiVec = 1;
1159 
1160   if (Args.hasArg(OPT_pthread))
1161     Opts.POSIXThreads = 1;
1162 
1163   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1164                                         "default");
1165   if (Vis == "default")
1166     Opts.setVisibilityMode(LangOptions::Default);
1167   else if (Vis == "hidden")
1168     Opts.setVisibilityMode(LangOptions::Hidden);
1169   else if (Vis == "protected")
1170     Opts.setVisibilityMode(LangOptions::Protected);
1171   else
1172     Diags.Report(diag::err_drv_invalid_value)
1173       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1174 
1175   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1176 
1177   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1178   // is specified, or -std is set to a conforming mode.
1179   Opts.Trigraphs = !Opts.GNUMode;
1180   if (Args.hasArg(OPT_trigraphs))
1181     Opts.Trigraphs = 1;
1182 
1183   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1184                                    OPT_fno_dollars_in_identifiers,
1185                                    !Opts.AsmPreprocessor);
1186   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1187   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1188   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1189   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1190   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1191     Opts.LaxVectorConversions = 0;
1192   if (Args.hasArg(OPT_fno_threadsafe_statics))
1193     Opts.ThreadsafeStatics = 0;
1194   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1195   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1196   Opts.Blocks = Args.hasArg(OPT_fblocks);
1197   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1198   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1199   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1200   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1201   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1202   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1203   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1204   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1205   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1206   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1207                                                Diags);
1208   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1209   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1210                                                  OPT_fconstant_string_class);
1211   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1212   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1213   if (Opts.ObjCNonFragileABI2)
1214     Opts.ObjCNonFragileABI = true;
1215   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1216   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1217   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1218   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1219   Opts.Static = Args.hasArg(OPT_static_define);
1220   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1221   Opts.DumpVtableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1222   Opts.OptimizeSize = 0;
1223 
1224   // FIXME: Eliminate this dependency.
1225   unsigned Opt =
1226     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1227   Opts.Optimize = Opt != 0;
1228 
1229   // This is the __NO_INLINE__ define, which just depends on things like the
1230   // optimization level and -fno-inline, not actually whether the backend has
1231   // inlining enabled.
1232   //
1233   // FIXME: This is affected by other options (-fno-inline).
1234   Opts.NoInline = !Opt;
1235 
1236   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1237   switch (SSP) {
1238   default:
1239     Diags.Report(diag::err_drv_invalid_value)
1240       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1241     break;
1242   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1243   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1244   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1245   }
1246 }
1247 
1248 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1249                                   Diagnostic &Diags) {
1250   using namespace cc1options;
1251   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1252   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1253   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1254       Opts.TokenCache = A->getValue(Args);
1255   else
1256     Opts.TokenCache = Opts.ImplicitPTHInclude;
1257   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1258   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1259   // Add macros from the command line.
1260   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1261          ie = Args.filtered_end(); it != ie; ++it) {
1262     if (it->getOption().matches(OPT_D))
1263       Opts.addMacroDef(it->getValue(Args));
1264     else
1265       Opts.addMacroUndef(it->getValue(Args));
1266   }
1267 
1268   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1269 
1270   // Add the ordered list of -includes.
1271   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1272                                              OPT_include_pth),
1273          ie = Args.filtered_end(); it != ie; ++it) {
1274     // PCH is handled specially, we need to extra the original include path.
1275     if (it->getOption().matches(OPT_include_pch)) {
1276       std::string OriginalFile =
1277         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1278       if (OriginalFile.empty())
1279         continue;
1280 
1281       Opts.Includes.push_back(OriginalFile);
1282     } else
1283       Opts.Includes.push_back(it->getValue(Args));
1284   }
1285 
1286   // Include 'altivec.h' if -faltivec option present
1287   if (Args.hasArg(OPT_faltivec))
1288     Opts.Includes.push_back("altivec.h");
1289 
1290   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1291          ie = Args.filtered_end(); it != ie; ++it) {
1292     std::pair<llvm::StringRef,llvm::StringRef> Split =
1293       llvm::StringRef(it->getValue(Args)).split(';');
1294 
1295     if (Split.second.empty()) {
1296       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1297       continue;
1298     }
1299 
1300     Opts.addRemappedFile(Split.first, Split.second);
1301   }
1302 }
1303 
1304 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1305                                         ArgList &Args) {
1306   using namespace cc1options;
1307   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1308   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1309   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1310   Opts.ShowComments = Args.hasArg(OPT_C);
1311   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1312 }
1313 
1314 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1315   using namespace cc1options;
1316   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1317   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1318   Opts.Triple = getLastArgValue(Args, OPT_triple);
1319   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1320 
1321   // Use the host triple if unspecified.
1322   if (Opts.Triple.empty())
1323     Opts.Triple = llvm::sys::getHostTriple();
1324 }
1325 
1326 //
1327 
1328 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1329                                         const char **ArgBegin,
1330                                         const char **ArgEnd,
1331                                         Diagnostic &Diags) {
1332   // Parse the arguments.
1333   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1334   unsigned MissingArgIndex, MissingArgCount;
1335   llvm::OwningPtr<InputArgList> Args(
1336     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1337 
1338   // Check for missing argument error.
1339   if (MissingArgCount)
1340     Diags.Report(diag::err_drv_missing_argument)
1341       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1342 
1343   // Issue errors on unknown arguments.
1344   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1345          ie = Args->filtered_end(); it != ie; ++it)
1346     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1347 
1348   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1349   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1350   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1351   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1352   FrontendOptions::InputKind DashX =
1353     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1354   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1355   if (DashX != FrontendOptions::IK_AST)
1356     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1357   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1358   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1359   ParseTargetArgs(Res.getTargetOpts(), *Args);
1360 }
1361