xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision 8ee6760971085f63258bca2777da61adfe446afe) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/PCHReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // VerifyModule is only derived.
149   // Inlining is only derived.
150 
151   if (Opts.AsmVerbose)
152     Res.push_back("-masm-verbose");
153   if (!Opts.CodeModel.empty()) {
154     Res.push_back("-mcode-model");
155     Res.push_back(Opts.CodeModel);
156   }
157   if (!Opts.CXAAtExit)
158     Res.push_back("-fno-use-cxa-atexit");
159   if (Opts.CXXCtorDtorAliases)
160     Res.push_back("-mconstructor-aliases");
161   if (!Opts.DebugPass.empty()) {
162     Res.push_back("-mdebug-pass");
163     Res.push_back(Opts.DebugPass);
164   }
165   if (Opts.DisableFPElim)
166     Res.push_back("-mdisable-fp-elim");
167   if (!Opts.FloatABI.empty()) {
168     Res.push_back("-mfloat-abi");
169     Res.push_back(Opts.FloatABI);
170   }
171   if (!Opts.LimitFloatPrecision.empty()) {
172     Res.push_back("-mlimit-float-precision");
173     Res.push_back(Opts.LimitFloatPrecision);
174   }
175   if (Opts.NoZeroInitializedInBSS)
176     Res.push_back("-mno-zero-initialized-bss");
177   if (Opts.ObjCLegacyDispatch)
178     Res.push_back("-fobjc-legacy-dispatch");
179   if (Opts.SoftFloat)
180     Res.push_back("-msoft-float");
181   if (Opts.UnwindTables)
182     Res.push_back("-munwind-tables");
183   if (Opts.RelocationModel != "pic") {
184     Res.push_back("-mrelocation-model");
185     Res.push_back(Opts.RelocationModel);
186   }
187   if (!Opts.VerifyModule)
188     Res.push_back("-disable-llvm-verifier");
189 }
190 
191 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
192                                        std::vector<std::string> &Res) {
193   if (Opts.IncludeSystemHeaders)
194     Res.push_back("-sys-header-deps");
195   if (Opts.UsePhonyTargets)
196     Res.push_back("-MP");
197   if (!Opts.OutputFile.empty()) {
198     Res.push_back("-dependency-file");
199     Res.push_back(Opts.OutputFile);
200   }
201   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
202     Res.push_back("-MT");
203     Res.push_back(Opts.Targets[i]);
204   }
205 }
206 
207 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
208                                  std::vector<std::string> &Res) {
209   if (Opts.IgnoreWarnings)
210     Res.push_back("-w");
211   if (Opts.NoRewriteMacros)
212     Res.push_back("-Wno-rewrite-macros");
213   if (Opts.Pedantic)
214     Res.push_back("-pedantic");
215   if (Opts.PedanticErrors)
216     Res.push_back("-pedantic-errors");
217   if (!Opts.ShowColumn)
218     Res.push_back("-fno-show-column");
219   if (!Opts.ShowLocation)
220     Res.push_back("-fno-show-source-location");
221   if (!Opts.ShowCarets)
222     Res.push_back("-fno-caret-diagnostics");
223   if (!Opts.ShowFixits)
224     Res.push_back("-fno-diagnostics-fixit-info");
225   if (Opts.ShowSourceRanges)
226     Res.push_back("-fdiagnostics-print-source-range-info");
227   if (Opts.ShowColors)
228     Res.push_back("-fcolor-diagnostics");
229   if (Opts.VerifyDiagnostics)
230     Res.push_back("-verify");
231   if (Opts.BinaryOutput)
232     Res.push_back("-fdiagnostics-binary");
233   if (Opts.ShowOptionNames)
234     Res.push_back("-fdiagnostics-show-option");
235   if (Opts.ErrorLimit) {
236     Res.push_back("-ferror-limit");
237     Res.push_back(llvm::utostr(Opts.ErrorLimit));
238   }
239   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
240     Res.push_back("-ftabstop");
241     Res.push_back(llvm::utostr(Opts.TabStop));
242   }
243   if (Opts.MessageLength) {
244     Res.push_back("-fmessage-length");
245     Res.push_back(llvm::utostr(Opts.MessageLength));
246   }
247   if (!Opts.DumpBuildInformation.empty()) {
248     Res.push_back("-dump-build-information");
249     Res.push_back(Opts.DumpBuildInformation);
250   }
251   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
252     Res.push_back("-W" + Opts.Warnings[i]);
253 }
254 
255 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
256   switch (Kind) {
257   case FrontendOptions::IK_None:              break;
258   case FrontendOptions::IK_AST:               return "ast";
259   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
260   case FrontendOptions::IK_C:                 return "c";
261   case FrontendOptions::IK_CXX:               return "c++";
262   case FrontendOptions::IK_ObjC:              return "objective-c";
263   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
264   case FrontendOptions::IK_OpenCL:            return "cl";
265   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
266   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
267   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
268   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
269   }
270 
271   llvm_unreachable("Unexpected language kind!");
272   return 0;
273 }
274 
275 static const char *getActionName(frontend::ActionKind Kind) {
276   switch (Kind) {
277   case frontend::PluginAction:
278   case frontend::InheritanceView:
279     llvm_unreachable("Invalid kind!");
280 
281   case frontend::ASTDump:                return "-ast-dump";
282   case frontend::ASTPrint:               return "-ast-print";
283   case frontend::ASTPrintXML:            return "-ast-print-xml";
284   case frontend::ASTView:                return "-ast-view";
285   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
286   case frontend::DumpTokens:             return "-dump-tokens";
287   case frontend::EmitAssembly:           return "-S";
288   case frontend::EmitBC:                 return "-emit-llvm-bc";
289   case frontend::EmitHTML:               return "-emit-html";
290   case frontend::EmitLLVM:               return "-emit-llvm";
291   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
292   case frontend::EmitObj:                return "-emit-obj";
293   case frontend::FixIt:                  return "-fixit";
294   case frontend::GeneratePCH:            return "-emit-pch";
295   case frontend::GeneratePTH:            return "-emit-pth";
296   case frontend::InitOnly:               return "-init-only";
297   case frontend::ParseNoop:              return "-parse-noop";
298   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
299   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
300   case frontend::PrintDeclContext:       return "-print-decl-contexts";
301   case frontend::PrintPreprocessedInput: return "-E";
302   case frontend::RewriteMacros:          return "-rewrite-macros";
303   case frontend::RewriteObjC:            return "-rewrite-objc";
304   case frontend::RewriteTest:            return "-rewrite-test";
305   case frontend::RunAnalysis:            return "-analyze";
306   case frontend::RunPreprocessorOnly:    return "-Eonly";
307   }
308 
309   llvm_unreachable("Unexpected language kind!");
310   return 0;
311 }
312 
313 static void FrontendOptsToArgs(const FrontendOptions &Opts,
314                                std::vector<std::string> &Res) {
315   if (!Opts.DebugCodeCompletionPrinter)
316     Res.push_back("-no-code-completion-debug-printer");
317   if (Opts.DisableFree)
318     Res.push_back("-disable-free");
319   if (Opts.RelocatablePCH)
320     Res.push_back("-relocatable-pch");
321   if (Opts.ShowHelp)
322     Res.push_back("-help");
323   if (Opts.ShowMacrosInCodeCompletion)
324     Res.push_back("-code-completion-macros");
325   if (Opts.ShowStats)
326     Res.push_back("-print-stats");
327   if (Opts.ShowTimers)
328     Res.push_back("-ftime-report");
329   if (Opts.ShowVersion)
330     Res.push_back("-version");
331 
332   bool NeedLang = false;
333   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
334     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
335         Opts.Inputs[i].first)
336       NeedLang = true;
337   if (NeedLang) {
338     Res.push_back("-x");
339     Res.push_back(getInputKindName(Opts.Inputs[0].first));
340   }
341   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
342     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
343            "Unable to represent this input vector!");
344     Res.push_back(Opts.Inputs[i].second);
345   }
346 
347   if (!Opts.OutputFile.empty()) {
348     Res.push_back("-o");
349     Res.push_back(Opts.OutputFile);
350   }
351   if (!Opts.ViewClassInheritance.empty()) {
352     Res.push_back("-cxx-inheritance-view");
353     Res.push_back(Opts.ViewClassInheritance);
354   }
355   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
356     Res.push_back("-fixit-at");
357     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
358                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
359                   llvm::utostr(Opts.FixItLocations[i].Column));
360   }
361   if (!Opts.CodeCompletionAt.FileName.empty()) {
362     Res.push_back("-code-completion-at");
363     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
364                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
365                   llvm::utostr(Opts.CodeCompletionAt.Column));
366   }
367   if (Opts.ProgramAction != frontend::InheritanceView &&
368       Opts.ProgramAction != frontend::PluginAction)
369     Res.push_back(getActionName(Opts.ProgramAction));
370   if (!Opts.ActionName.empty()) {
371     Res.push_back("-plugin");
372     Res.push_back(Opts.ActionName);
373   }
374   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
375     Res.push_back("-load");
376     Res.push_back(Opts.Plugins[i]);
377   }
378   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
379     Res.push_back("-ast-merge");
380     Res.push_back(Opts.ASTMergeFiles[i]);
381   }
382 }
383 
384 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
385                                    std::vector<std::string> &Res) {
386   if (Opts.Sysroot != "/") {
387     Res.push_back("-isysroot");
388     Res.push_back(Opts.Sysroot);
389   }
390 
391   /// User specified include entries.
392   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
393     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
394     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
395       llvm::report_fatal_error("Invalid option set!");
396     if (E.IsUserSupplied) {
397       if (E.Group == frontend::After) {
398         Res.push_back("-idirafter");
399       } else if (E.Group == frontend::Quoted) {
400         Res.push_back("-iquote");
401       } else if (E.Group == frontend::System) {
402         Res.push_back("-isystem");
403       } else {
404         assert(E.Group == frontend::Angled && "Invalid group!");
405         Res.push_back(E.IsFramework ? "-F" : "-I");
406       }
407     } else {
408       if (E.Group != frontend::Angled && E.Group != frontend::System)
409         llvm::report_fatal_error("Invalid option set!");
410       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
411                     "-iwithprefix");
412     }
413     Res.push_back(E.Path);
414   }
415 
416   if (!Opts.EnvIncPath.empty()) {
417     // FIXME: Provide an option for this, and move env detection to driver.
418     llvm::report_fatal_error("Not yet implemented!");
419   }
420   if (!Opts.CEnvIncPath.empty()) {
421     // FIXME: Provide an option for this, and move env detection to driver.
422     llvm::report_fatal_error("Not yet implemented!");
423   }
424   if (!Opts.ObjCEnvIncPath.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.CXXEnvIncPath.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.ObjCXXEnvIncPath.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.ResourceDir.empty()) {
437     Res.push_back("-resource-dir");
438     Res.push_back(Opts.ResourceDir);
439   }
440   if (!Opts.UseStandardIncludes)
441     Res.push_back("-nostdinc");
442   if (!Opts.UseStandardCXXIncludes)
443     Res.push_back("-nostdinc++");
444   if (Opts.Verbose)
445     Res.push_back("-v");
446 }
447 
448 static void LangOptsToArgs(const LangOptions &Opts,
449                            std::vector<std::string> &Res) {
450   LangOptions DefaultLangOpts;
451 
452   // FIXME: Need to set -std to get all the implicit options.
453 
454   // FIXME: We want to only pass options relative to the defaults, which
455   // requires constructing a target. :(
456   //
457   // It would be better to push the all target specific choices into the driver,
458   // so that everything below that was more uniform.
459 
460   if (Opts.Trigraphs)
461     Res.push_back("-trigraphs");
462   // Implicit based on the input kind:
463   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
464   // Implicit based on the input language standard:
465   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
466   if (Opts.DollarIdents)
467     Res.push_back("-fdollars-in-identifiers");
468   if (Opts.Microsoft)
469     Res.push_back("-fms-extensions");
470   if (Opts.ObjCNonFragileABI)
471     Res.push_back("-fobjc-nonfragile-abi");
472   if (Opts.ObjCNonFragileABI2)
473     Res.push_back("-fobjc-nonfragile-abi2");
474   // NoInline is implicit.
475   if (!Opts.CXXOperatorNames)
476     Res.push_back("-fno-operator-names");
477   if (Opts.PascalStrings)
478     Res.push_back("-fpascal-strings");
479   if (Opts.CatchUndefined)
480     Res.push_back("-fcatch-undefined-behavior");
481   if (Opts.WritableStrings)
482     Res.push_back("-fwritable-strings");
483   if (Opts.ConstStrings)
484     Res.push_back("-Wwrite-strings");
485   if (!Opts.LaxVectorConversions)
486     Res.push_back("-fno-lax-vector-conversions");
487   if (Opts.AltiVec)
488     Res.push_back("-faltivec");
489   if (Opts.Exceptions)
490     Res.push_back("-fexceptions");
491   if (Opts.SjLjExceptions)
492     Res.push_back("-fsjlj-exceptions");
493   if (!Opts.RTTI)
494     Res.push_back("-fno-rtti");
495   if (!Opts.NeXTRuntime)
496     Res.push_back("-fgnu-runtime");
497   if (Opts.Freestanding)
498     Res.push_back("-ffreestanding");
499   if (Opts.NoBuiltin)
500     Res.push_back("-fno-builtin");
501   if (!Opts.AssumeSaneOperatorNew)
502     Res.push_back("-fno-assume-sane-operator-new");
503   if (!Opts.ThreadsafeStatics)
504     Res.push_back("-fno-threadsafe-statics");
505   if (Opts.POSIXThreads)
506     Res.push_back("-pthread");
507   if (Opts.Blocks)
508     Res.push_back("-fblocks");
509   if (Opts.EmitAllDecls)
510     Res.push_back("-femit-all-decls");
511   if (Opts.MathErrno)
512     Res.push_back("-fmath-errno");
513   if (Opts.OverflowChecking)
514     Res.push_back("-ftrapv");
515   if (Opts.HeinousExtensions)
516     Res.push_back("-fheinous-gnu-extensions");
517   // Optimize is implicit.
518   // OptimizeSize is implicit.
519   if (Opts.Static)
520     Res.push_back("-static-define");
521   if (Opts.PICLevel) {
522     Res.push_back("-pic-level");
523     Res.push_back(llvm::utostr(Opts.PICLevel));
524   }
525   if (Opts.ObjCGCBitmapPrint)
526     Res.push_back("-print-ivar-layout");
527   // FIXME: Don't forget to update when the default changes!
528   if (Opts.AccessControl)
529     Res.push_back("-faccess-control");
530   if (!Opts.CharIsSigned)
531     Res.push_back("-fno-signed-char");
532   if (Opts.ShortWChar)
533     Res.push_back("-fshort-wchar");
534   if (!Opts.ElideConstructors)
535     Res.push_back("-fno-elide-constructors");
536   if (Opts.getGCMode() != LangOptions::NonGC) {
537     if (Opts.getGCMode() == LangOptions::HybridGC) {
538       Res.push_back("-fobjc-gc");
539     } else {
540       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
541       Res.push_back("-fobjc-gc-only");
542     }
543   }
544   if (Opts.getVisibilityMode() != LangOptions::Default) {
545     Res.push_back("-fvisibility");
546     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
547       Res.push_back("hidden");
548     } else {
549       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
550              "Invalid visibility!");
551       Res.push_back("protected");
552     }
553   }
554   if (Opts.getStackProtectorMode() != 0) {
555     Res.push_back("-stack-protector");
556     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
557   }
558   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
559     Res.push_back("-ftemplate-depth");
560     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
561   }
562   if (!Opts.ObjCConstantStringClass.empty()) {
563     Res.push_back("-fconstant-string-class");
564     Res.push_back(Opts.ObjCConstantStringClass);
565   }
566 }
567 
568 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
569                                    std::vector<std::string> &Res) {
570   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
571     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
572                   Opts.Macros[i].first);
573   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
574     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
575     Res.push_back("-include");
576     Res.push_back(Opts.Includes[i]);
577   }
578   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
579     Res.push_back("-imacros");
580     Res.push_back(Opts.MacroIncludes[i]);
581   }
582   if (!Opts.UsePredefines)
583     Res.push_back("-undef");
584   if (Opts.DetailedRecord)
585     Res.push_back("-detailed-preprocessing-record");
586   if (!Opts.ImplicitPCHInclude.empty()) {
587     Res.push_back("-include-pch");
588     Res.push_back(Opts.ImplicitPCHInclude);
589   }
590   if (!Opts.ImplicitPTHInclude.empty()) {
591     Res.push_back("-include-pth");
592     Res.push_back(Opts.ImplicitPTHInclude);
593   }
594   if (!Opts.TokenCache.empty()) {
595     if (Opts.ImplicitPTHInclude.empty()) {
596       Res.push_back("-token-cache");
597       Res.push_back(Opts.TokenCache);
598     } else
599       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
600              "Unsupported option combination!");
601   }
602   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
603     Res.push_back("-remap-file");
604     Res.push_back(Opts.RemappedFiles[i].first + ";" +
605                   Opts.RemappedFiles[i].second);
606   }
607 }
608 
609 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
610                                          std::vector<std::string> &Res) {
611   if (!Opts.ShowCPP && !Opts.ShowMacros)
612     llvm::report_fatal_error("Invalid option combination!");
613 
614   if (Opts.ShowCPP && Opts.ShowMacros)
615     Res.push_back("-dD");
616   else if (!Opts.ShowCPP && Opts.ShowMacros)
617     Res.push_back("-dM");
618 
619   if (!Opts.ShowLineMarkers)
620     Res.push_back("-P");
621   if (Opts.ShowComments)
622     Res.push_back("-C");
623   if (Opts.ShowMacroComments)
624     Res.push_back("-CC");
625 }
626 
627 static void TargetOptsToArgs(const TargetOptions &Opts,
628                              std::vector<std::string> &Res) {
629   Res.push_back("-triple");
630   Res.push_back(Opts.Triple);
631   if (!Opts.CPU.empty()) {
632     Res.push_back("-target-cpu");
633     Res.push_back(Opts.CPU);
634   }
635   if (!Opts.ABI.empty()) {
636     Res.push_back("-target-abi");
637     Res.push_back(Opts.ABI);
638   }
639   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
640     Res.push_back("-target-feature");
641     Res.push_back(Opts.Features[i]);
642   }
643 }
644 
645 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
646   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
647   CodeGenOptsToArgs(getCodeGenOpts(), Res);
648   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
649   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
650   FrontendOptsToArgs(getFrontendOpts(), Res);
651   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
652   LangOptsToArgs(getLangOpts(), Res);
653   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
654   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
655   TargetOptsToArgs(getTargetOpts(), Res);
656 }
657 
658 //===----------------------------------------------------------------------===//
659 // Deserialization (to args)
660 //===----------------------------------------------------------------------===//
661 
662 using namespace clang::driver;
663 using namespace clang::driver::cc1options;
664 
665 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
666                                        llvm::StringRef Default = "") {
667   if (Arg *A = Args.getLastArg(ID))
668     return A->getValue(Args);
669   return Default;
670 }
671 
672 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
673                               int Default, Diagnostic &Diags) {
674   Arg *A = Args.getLastArg(ID);
675   if (!A)
676     return Default;
677 
678   int Res = Default;
679   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
680     Diags.Report(diag::err_drv_invalid_int_value)
681         << A->getAsString(Args) << A->getValue(Args);
682 
683   return Res;
684 }
685 
686 static std::vector<std::string>
687 getAllArgValues(ArgList &Args, cc1options::ID ID) {
688   llvm::SmallVector<const char *, 16> Values;
689   Args.AddAllArgValues(Values, ID);
690   return std::vector<std::string>(Values.begin(), Values.end());
691 }
692 
693 //
694 
695 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
696                               Diagnostic &Diags) {
697   using namespace cc1options;
698 
699   Opts.AnalysisList.clear();
700 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
701   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
702 #include "clang/Frontend/Analyses.def"
703 
704   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
705     llvm::StringRef Name = A->getValue(Args);
706     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
707 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
708       .Case(CMDFLAG, NAME##Model)
709 #include "clang/Frontend/Analyses.def"
710       .Default(NumStores);
711     // FIXME: Error handling.
712     if (Value == NumStores)
713       Diags.Report(diag::err_drv_invalid_value)
714         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
715     else
716       Opts.AnalysisStoreOpt = Value;
717   }
718 
719   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
720     llvm::StringRef Name = A->getValue(Args);
721     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
722 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
723       .Case(CMDFLAG, NAME##Model)
724 #include "clang/Frontend/Analyses.def"
725       .Default(NumConstraints);
726     // FIXME: Error handling.
727     if (Value == NumConstraints)
728       Diags.Report(diag::err_drv_invalid_value)
729         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
730     else
731       Opts.AnalysisConstraintsOpt = Value;
732   }
733 
734   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
735     llvm::StringRef Name = A->getValue(Args);
736     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
737 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
738       .Case(CMDFLAG, PD_##NAME)
739 #include "clang/Frontend/Analyses.def"
740       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
741     // FIXME: Error handling.
742     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
743       Diags.Report(diag::err_drv_invalid_value)
744         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
745     else
746       Opts.AnalysisDiagOpt = Value;
747   }
748 
749   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
750   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
751   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
752   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
753   Opts.AnalyzeNestedBlocks =
754     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
755   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
756   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
757   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
758   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
759   Opts.EnableExperimentalInternalChecks =
760     Args.hasArg(OPT_analyzer_experimental_internal_checks);
761   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
762 }
763 
764 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
765                              Diagnostic &Diags) {
766   using namespace cc1options;
767   // -Os implies -O2
768   if (Args.hasArg(OPT_Os))
769     Opts.OptimizationLevel = 2;
770   else {
771     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
772     if (Opts.OptimizationLevel > 3) {
773       Diags.Report(diag::err_drv_invalid_value)
774         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
775       Opts.OptimizationLevel = 3;
776     }
777   }
778 
779   // We must always run at least the always inlining pass.
780   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
781     : CodeGenOptions::OnlyAlwaysInlining;
782 
783   Opts.DebugInfo = Args.hasArg(OPT_g);
784   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
785   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
786   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
787   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
788   Opts.NoCommon = Args.hasArg(OPT_fno_common);
789   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
790   Opts.OptimizeSize = Args.hasArg(OPT_Os);
791   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
792 
793   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
794   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
795   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
796   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
797   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
798   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
799   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
800   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
801   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
802   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
803   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
804   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
805   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
806 
807   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
808   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
809 }
810 
811 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
812                                       ArgList &Args) {
813   using namespace cc1options;
814   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
815   Opts.Targets = getAllArgValues(Args, OPT_MT);
816   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
817   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
818 }
819 
820 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
821                                 Diagnostic &Diags) {
822   using namespace cc1options;
823   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
824   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
825   Opts.Pedantic = Args.hasArg(OPT_pedantic);
826   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
827   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
828   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
829   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
830   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
831   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
832   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
833   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
834   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
835   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
836   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
837   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
838                                     DiagnosticOptions::DefaultTabStop, Diags);
839   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
840     Diags.Report(diag::warn_ignoring_ftabstop_value)
841       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
842     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
843   }
844   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
845   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
846   Opts.Warnings = getAllArgValues(Args, OPT_W);
847 }
848 
849 static FrontendOptions::InputKind
850 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
851   using namespace cc1options;
852   Opts.ProgramAction = frontend::ParseSyntaxOnly;
853   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
854     switch (A->getOption().getID()) {
855     default:
856       assert(0 && "Invalid option in group!");
857     case OPT_ast_dump:
858       Opts.ProgramAction = frontend::ASTDump; break;
859     case OPT_ast_print:
860       Opts.ProgramAction = frontend::ASTPrint; break;
861     case OPT_ast_print_xml:
862       Opts.ProgramAction = frontend::ASTPrintXML; break;
863     case OPT_ast_view:
864       Opts.ProgramAction = frontend::ASTView; break;
865     case OPT_dump_raw_tokens:
866       Opts.ProgramAction = frontend::DumpRawTokens; break;
867     case OPT_dump_tokens:
868       Opts.ProgramAction = frontend::DumpTokens; break;
869     case OPT_S:
870       Opts.ProgramAction = frontend::EmitAssembly; break;
871     case OPT_emit_llvm_bc:
872       Opts.ProgramAction = frontend::EmitBC; break;
873     case OPT_emit_html:
874       Opts.ProgramAction = frontend::EmitHTML; break;
875     case OPT_emit_llvm:
876       Opts.ProgramAction = frontend::EmitLLVM; break;
877     case OPT_emit_llvm_only:
878       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
879     case OPT_emit_obj:
880       Opts.ProgramAction = frontend::EmitObj; break;
881     case OPT_fixit:
882       Opts.ProgramAction = frontend::FixIt; break;
883     case OPT_emit_pch:
884       Opts.ProgramAction = frontend::GeneratePCH; break;
885     case OPT_emit_pth:
886       Opts.ProgramAction = frontend::GeneratePTH; break;
887     case OPT_init_only:
888       Opts.ProgramAction = frontend::InitOnly; break;
889     case OPT_parse_noop:
890       Opts.ProgramAction = frontend::ParseNoop; break;
891     case OPT_parse_print_callbacks:
892       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
893     case OPT_fsyntax_only:
894       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
895     case OPT_print_decl_contexts:
896       Opts.ProgramAction = frontend::PrintDeclContext; break;
897     case OPT_E:
898       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
899     case OPT_rewrite_macros:
900       Opts.ProgramAction = frontend::RewriteMacros; break;
901     case OPT_rewrite_objc:
902       Opts.ProgramAction = frontend::RewriteObjC; break;
903     case OPT_rewrite_test:
904       Opts.ProgramAction = frontend::RewriteTest; break;
905     case OPT_analyze:
906       Opts.ProgramAction = frontend::RunAnalysis; break;
907     case OPT_Eonly:
908       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
909     }
910   }
911   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
912     Opts.ProgramAction = frontend::PluginAction;
913     Opts.ActionName = A->getValue(Args);
914   }
915 
916   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
917     Opts.CodeCompletionAt =
918       ParsedSourceLocation::FromString(A->getValue(Args));
919     if (Opts.CodeCompletionAt.FileName.empty())
920       Diags.Report(diag::err_drv_invalid_value)
921         << A->getAsString(Args) << A->getValue(Args);
922   }
923   Opts.DebugCodeCompletionPrinter =
924     !Args.hasArg(OPT_no_code_completion_debug_printer);
925   Opts.DisableFree = Args.hasArg(OPT_disable_free);
926 
927   Opts.FixItLocations.clear();
928   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
929          ie = Args.filtered_end(); it != ie; ++it) {
930     const char *Loc = it->getValue(Args);
931     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
932 
933     if (PSL.FileName.empty()) {
934       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
935       continue;
936     }
937 
938     Opts.FixItLocations.push_back(PSL);
939   }
940 
941   Opts.OutputFile = getLastArgValue(Args, OPT_o);
942   Opts.Plugins = getAllArgValues(Args, OPT_load);
943   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
944   Opts.ShowHelp = Args.hasArg(OPT_help);
945   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
946   Opts.ShowStats = Args.hasArg(OPT_print_stats);
947   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
948   Opts.ShowVersion = Args.hasArg(OPT_version);
949   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
950   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
951 
952   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
953   if (const Arg *A = Args.getLastArg(OPT_x)) {
954     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
955       .Case("c", FrontendOptions::IK_C)
956       .Case("cl", FrontendOptions::IK_OpenCL)
957       .Case("c", FrontendOptions::IK_C)
958       .Case("cl", FrontendOptions::IK_OpenCL)
959       .Case("c++", FrontendOptions::IK_CXX)
960       .Case("objective-c", FrontendOptions::IK_ObjC)
961       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
962       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
963       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
964       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
965       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
966       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
967       .Case("c-header", FrontendOptions::IK_C)
968       .Case("objective-c-header", FrontendOptions::IK_ObjC)
969       .Case("c++-header", FrontendOptions::IK_CXX)
970       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
971       .Case("ast", FrontendOptions::IK_AST)
972       .Default(FrontendOptions::IK_None);
973     if (DashX == FrontendOptions::IK_None)
974       Diags.Report(diag::err_drv_invalid_value)
975         << A->getAsString(Args) << A->getValue(Args);
976   }
977 
978   // '-' is the default input if none is given.
979   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
980   Opts.Inputs.clear();
981   if (Inputs.empty())
982     Inputs.push_back("-");
983   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
984     FrontendOptions::InputKind IK = DashX;
985     if (IK == FrontendOptions::IK_None) {
986       IK = FrontendOptions::getInputKindForExtension(
987         llvm::StringRef(Inputs[i]).rsplit('.').second);
988       // FIXME: Remove this hack.
989       if (i == 0)
990         DashX = IK;
991     }
992     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
993   }
994 
995   return DashX;
996 }
997 
998 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
999                                                  void *MainAddr) {
1000   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1001 
1002   if (!P.isEmpty()) {
1003     P.eraseComponent();  // Remove /clang from foo/bin/clang
1004     P.eraseComponent();  // Remove /bin   from foo/bin
1005 
1006     // Get foo/lib/clang/<version>/include
1007     P.appendComponent("lib");
1008     P.appendComponent("clang");
1009     P.appendComponent(CLANG_VERSION_STRING);
1010   }
1011 
1012   return P.str();
1013 }
1014 
1015 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1016   using namespace cc1options;
1017   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1018   Opts.Verbose = Args.hasArg(OPT_v);
1019   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1020   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1021   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1022   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1023 
1024   // Add -I... and -F... options in order.
1025   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1026          ie = Args.filtered_end(); it != ie; ++it)
1027     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1028                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1029 
1030   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1031   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1032   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1033                                              OPT_iwithprefixbefore),
1034          ie = Args.filtered_end(); it != ie; ++it) {
1035     if (it->getOption().matches(OPT_iprefix))
1036       Prefix = it->getValue(Args);
1037     else if (it->getOption().matches(OPT_iwithprefix))
1038       Opts.AddPath(Prefix.str() + it->getValue(Args),
1039                    frontend::System, false, false);
1040     else
1041       Opts.AddPath(Prefix.str() + it->getValue(Args),
1042                    frontend::Angled, false, false);
1043   }
1044 
1045   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1046          ie = Args.filtered_end(); it != ie; ++it)
1047     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1048   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1049          ie = Args.filtered_end(); it != ie; ++it)
1050     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1051   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1052          ie = Args.filtered_end(); it != ie; ++it)
1053     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1054 
1055   // FIXME: Need options for the various environment variables!
1056 }
1057 
1058 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1059                           FrontendOptions::InputKind IK,
1060                           Diagnostic &Diags) {
1061   // FIXME: Cleanup per-file based stuff.
1062 
1063   // Set some properties which depend soley on the input kind; it would be nice
1064   // to move these to the language standard, and have the driver resolve the
1065   // input kind + language standard.
1066   if (IK == FrontendOptions::IK_Asm) {
1067     Opts.AsmPreprocessor = 1;
1068   } else if (IK == FrontendOptions::IK_ObjC ||
1069              IK == FrontendOptions::IK_ObjCXX ||
1070              IK == FrontendOptions::IK_PreprocessedObjC ||
1071              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1072     Opts.ObjC1 = Opts.ObjC2 = 1;
1073   }
1074 
1075   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1076   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1077     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1078 #define LANGSTANDARD(id, name, desc, features) \
1079       .Case(name, LangStandard::lang_##id)
1080 #include "clang/Frontend/LangStandards.def"
1081       .Default(LangStandard::lang_unspecified);
1082     if (LangStd == LangStandard::lang_unspecified)
1083       Diags.Report(diag::err_drv_invalid_value)
1084         << A->getAsString(Args) << A->getValue(Args);
1085   }
1086 
1087   if (LangStd == LangStandard::lang_unspecified) {
1088     // Based on the base language, pick one.
1089     switch (IK) {
1090     case FrontendOptions::IK_None:
1091     case FrontendOptions::IK_AST:
1092       assert(0 && "Invalid input kind!");
1093     case FrontendOptions::IK_OpenCL:
1094       LangStd = LangStandard::lang_opencl;
1095       break;
1096     case FrontendOptions::IK_Asm:
1097     case FrontendOptions::IK_C:
1098     case FrontendOptions::IK_PreprocessedC:
1099     case FrontendOptions::IK_ObjC:
1100     case FrontendOptions::IK_PreprocessedObjC:
1101       LangStd = LangStandard::lang_gnu99;
1102       break;
1103     case FrontendOptions::IK_CXX:
1104     case FrontendOptions::IK_PreprocessedCXX:
1105     case FrontendOptions::IK_ObjCXX:
1106     case FrontendOptions::IK_PreprocessedObjCXX:
1107       LangStd = LangStandard::lang_gnucxx98;
1108       break;
1109     }
1110   }
1111 
1112   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1113   Opts.BCPLComment = Std.hasBCPLComments();
1114   Opts.C99 = Std.isC99();
1115   Opts.CPlusPlus = Std.isCPlusPlus();
1116   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1117   Opts.Digraphs = Std.hasDigraphs();
1118   Opts.GNUMode = Std.isGNUMode();
1119   Opts.GNUInline = !Std.isC99();
1120   Opts.HexFloats = Std.hasHexFloats();
1121   Opts.ImplicitInt = Std.hasImplicitInt();
1122 
1123   // OpenCL has some additional defaults.
1124   if (LangStd == LangStandard::lang_opencl) {
1125     Opts.OpenCL = 1;
1126     Opts.AltiVec = 1;
1127     Opts.CXXOperatorNames = 1;
1128     Opts.LaxVectorConversions = 1;
1129   }
1130 
1131   // OpenCL and C++ both have bool, true, false keywords.
1132   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1133 
1134   if (Opts.CPlusPlus)
1135     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1136 
1137   if (Args.hasArg(OPT_fobjc_gc_only))
1138     Opts.setGCMode(LangOptions::GCOnly);
1139   else if (Args.hasArg(OPT_fobjc_gc))
1140     Opts.setGCMode(LangOptions::HybridGC);
1141 
1142   if (Args.hasArg(OPT_print_ivar_layout))
1143     Opts.ObjCGCBitmapPrint = 1;
1144 
1145   if (Args.hasArg(OPT_faltivec))
1146     Opts.AltiVec = 1;
1147 
1148   if (Args.hasArg(OPT_pthread))
1149     Opts.POSIXThreads = 1;
1150 
1151   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1152                                         "default");
1153   if (Vis == "default")
1154     Opts.setVisibilityMode(LangOptions::Default);
1155   else if (Vis == "hidden")
1156     Opts.setVisibilityMode(LangOptions::Hidden);
1157   else if (Vis == "protected")
1158     Opts.setVisibilityMode(LangOptions::Protected);
1159   else
1160     Diags.Report(diag::err_drv_invalid_value)
1161       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1162 
1163   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1164 
1165   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1166   // is specified, or -std is set to a conforming mode.
1167   Opts.Trigraphs = !Opts.GNUMode;
1168   if (Args.hasArg(OPT_trigraphs))
1169     Opts.Trigraphs = 1;
1170 
1171   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1172                                    OPT_fno_dollars_in_identifiers,
1173                                    !Opts.AsmPreprocessor);
1174   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1175   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1176   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1177   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1178   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1179     Opts.LaxVectorConversions = 0;
1180   if (Args.hasArg(OPT_fno_threadsafe_statics))
1181     Opts.ThreadsafeStatics = 0;
1182   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1183   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1184   Opts.Blocks = Args.hasArg(OPT_fblocks);
1185   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1186   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1187   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1188   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1189   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1190   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1191   Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1192   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1193   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1194   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1195                                                Diags);
1196   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1197   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1198                                                  OPT_fconstant_string_class);
1199   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1200   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1201   if (Opts.ObjCNonFragileABI2)
1202     Opts.ObjCNonFragileABI = true;
1203   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1204   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1205   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1206   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1207   Opts.Static = Args.hasArg(OPT_static_define);
1208   Opts.DumpRecordLayouts = Args.hasArg(OPT_dump_record_layouts);
1209   Opts.DumpVtableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1210   Opts.OptimizeSize = 0;
1211 
1212   // FIXME: Eliminate this dependency.
1213   unsigned Opt =
1214     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1215   Opts.Optimize = Opt != 0;
1216 
1217   // This is the __NO_INLINE__ define, which just depends on things like the
1218   // optimization level and -fno-inline, not actually whether the backend has
1219   // inlining enabled.
1220   //
1221   // FIXME: This is affected by other options (-fno-inline).
1222   Opts.NoInline = !Opt;
1223 
1224   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1225   switch (SSP) {
1226   default:
1227     Diags.Report(diag::err_drv_invalid_value)
1228       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1229     break;
1230   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1231   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1232   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1233   }
1234 }
1235 
1236 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1237                                   Diagnostic &Diags) {
1238   using namespace cc1options;
1239   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1240   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1241   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1242       Opts.TokenCache = A->getValue(Args);
1243   else
1244     Opts.TokenCache = Opts.ImplicitPTHInclude;
1245   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1246   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1247   // Add macros from the command line.
1248   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1249          ie = Args.filtered_end(); it != ie; ++it) {
1250     if (it->getOption().matches(OPT_D))
1251       Opts.addMacroDef(it->getValue(Args));
1252     else
1253       Opts.addMacroUndef(it->getValue(Args));
1254   }
1255 
1256   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1257 
1258   // Add the ordered list of -includes.
1259   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1260                                              OPT_include_pth),
1261          ie = Args.filtered_end(); it != ie; ++it) {
1262     // PCH is handled specially, we need to extra the original include path.
1263     if (it->getOption().matches(OPT_include_pch)) {
1264       std::string OriginalFile =
1265         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1266       if (OriginalFile.empty())
1267         continue;
1268 
1269       Opts.Includes.push_back(OriginalFile);
1270     } else
1271       Opts.Includes.push_back(it->getValue(Args));
1272   }
1273 
1274   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1275          ie = Args.filtered_end(); it != ie; ++it) {
1276     std::pair<llvm::StringRef,llvm::StringRef> Split =
1277       llvm::StringRef(it->getValue(Args)).split(';');
1278 
1279     if (Split.second.empty()) {
1280       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1281       continue;
1282     }
1283 
1284     Opts.addRemappedFile(Split.first, Split.second);
1285   }
1286 }
1287 
1288 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1289                                         ArgList &Args) {
1290   using namespace cc1options;
1291   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1292   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1293   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1294   Opts.ShowComments = Args.hasArg(OPT_C);
1295   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1296 }
1297 
1298 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1299   using namespace cc1options;
1300   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1301   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1302   Opts.Triple = getLastArgValue(Args, OPT_triple);
1303   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1304 
1305   // Use the host triple if unspecified.
1306   if (Opts.Triple.empty())
1307     Opts.Triple = llvm::sys::getHostTriple();
1308 }
1309 
1310 //
1311 
1312 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1313                                         const char **ArgBegin,
1314                                         const char **ArgEnd,
1315                                         Diagnostic &Diags) {
1316   // Parse the arguments.
1317   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1318   unsigned MissingArgIndex, MissingArgCount;
1319   llvm::OwningPtr<InputArgList> Args(
1320     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1321 
1322   // Check for missing argument error.
1323   if (MissingArgCount)
1324     Diags.Report(diag::err_drv_missing_argument)
1325       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1326 
1327   // Issue errors on unknown arguments.
1328   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1329          ie = Args->filtered_end(); it != ie; ++it)
1330     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1331 
1332   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1333   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1334   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1335   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1336   FrontendOptions::InputKind DashX =
1337     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1338   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1339   if (DashX != FrontendOptions::IK_AST)
1340     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1341   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1342   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1343   ParseTargetArgs(Res.getTargetOpts(), *Args);
1344 }
1345