xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision e03aa55bfdf5f8f63c1c6b4240b71e1027750d0b) 
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.GNUMode && !Opts.GNUKeywords)
477     Res.push_back("-fno-gnu-keywords");
478   if (!Opts.GNUMode && Opts.GNUKeywords)
479     Res.push_back("-fgnu-keywords");
480   if (Opts.Microsoft)
481     Res.push_back("-fms-extensions");
482   if (Opts.ObjCNonFragileABI)
483     Res.push_back("-fobjc-nonfragile-abi");
484   if (Opts.ObjCNonFragileABI2)
485     Res.push_back("-fobjc-nonfragile-abi2");
486   // NoInline is implicit.
487   if (!Opts.CXXOperatorNames)
488     Res.push_back("-fno-operator-names");
489   if (Opts.PascalStrings)
490     Res.push_back("-fpascal-strings");
491   if (Opts.CatchUndefined)
492     Res.push_back("-fcatch-undefined-behavior");
493   if (Opts.WritableStrings)
494     Res.push_back("-fwritable-strings");
495   if (Opts.ConstStrings)
496     Res.push_back("-Wwrite-strings");
497   if (!Opts.LaxVectorConversions)
498     Res.push_back("-fno-lax-vector-conversions");
499   if (Opts.AltiVec)
500     Res.push_back("-faltivec");
501   if (Opts.Exceptions)
502     Res.push_back("-fexceptions");
503   if (Opts.SjLjExceptions)
504     Res.push_back("-fsjlj-exceptions");
505   if (!Opts.RTTI)
506     Res.push_back("-fno-rtti");
507   if (!Opts.NeXTRuntime)
508     Res.push_back("-fgnu-runtime");
509   if (Opts.Freestanding)
510     Res.push_back("-ffreestanding");
511   if (Opts.NoBuiltin)
512     Res.push_back("-fno-builtin");
513   if (!Opts.AssumeSaneOperatorNew)
514     Res.push_back("-fno-assume-sane-operator-new");
515   if (!Opts.ThreadsafeStatics)
516     Res.push_back("-fno-threadsafe-statics");
517   if (Opts.POSIXThreads)
518     Res.push_back("-pthread");
519   if (Opts.Blocks)
520     Res.push_back("-fblocks");
521   if (Opts.EmitAllDecls)
522     Res.push_back("-femit-all-decls");
523   if (Opts.MathErrno)
524     Res.push_back("-fmath-errno");
525   if (Opts.OverflowChecking)
526     Res.push_back("-ftrapv");
527   if (Opts.HeinousExtensions)
528     Res.push_back("-fheinous-gnu-extensions");
529   // Optimize is implicit.
530   // OptimizeSize is implicit.
531   if (Opts.Static)
532     Res.push_back("-static-define");
533   if (Opts.DumpRecordLayouts)
534     Res.push_back("-fdump-record-layouts");
535   if (Opts.DumpVTableLayouts)
536     Res.push_back("-fdump-vtable-layouts");
537   if (Opts.NoBitFieldTypeAlign)
538     Res.push_back("-fno-bitfield-type-alignment");
539   if (Opts.SjLjExceptions)
540     Res.push_back("-fsjlj-exceptions");
541   if (Opts.PICLevel) {
542     Res.push_back("-pic-level");
543     Res.push_back(llvm::utostr(Opts.PICLevel));
544   }
545   if (Opts.ObjCGCBitmapPrint)
546     Res.push_back("-print-ivar-layout");
547   if (!Opts.AccessControl)
548     Res.push_back("-fno-access-control");
549   if (!Opts.CharIsSigned)
550     Res.push_back("-fno-signed-char");
551   if (Opts.ShortWChar)
552     Res.push_back("-fshort-wchar");
553   if (!Opts.ElideConstructors)
554     Res.push_back("-fno-elide-constructors");
555   if (Opts.getGCMode() != LangOptions::NonGC) {
556     if (Opts.getGCMode() == LangOptions::HybridGC) {
557       Res.push_back("-fobjc-gc");
558     } else {
559       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
560       Res.push_back("-fobjc-gc-only");
561     }
562   }
563   if (Opts.getVisibilityMode() != LangOptions::Default) {
564     Res.push_back("-fvisibility");
565     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
566       Res.push_back("hidden");
567     } else {
568       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
569              "Invalid visibility!");
570       Res.push_back("protected");
571     }
572   }
573   if (Opts.getStackProtectorMode() != 0) {
574     Res.push_back("-stack-protector");
575     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
576   }
577   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
578     Res.push_back("-ftemplate-depth");
579     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
580   }
581   if (!Opts.ObjCConstantStringClass.empty()) {
582     Res.push_back("-fconstant-string-class");
583     Res.push_back(Opts.ObjCConstantStringClass);
584   }
585 }
586 
587 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
588                                    std::vector<std::string> &Res) {
589   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
590     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
591                   Opts.Macros[i].first);
592   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
593     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
594     Res.push_back("-include");
595     Res.push_back(Opts.Includes[i]);
596   }
597   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
598     Res.push_back("-imacros");
599     Res.push_back(Opts.MacroIncludes[i]);
600   }
601   if (!Opts.UsePredefines)
602     Res.push_back("-undef");
603   if (Opts.DetailedRecord)
604     Res.push_back("-detailed-preprocessing-record");
605   if (!Opts.ImplicitPCHInclude.empty()) {
606     Res.push_back("-include-pch");
607     Res.push_back(Opts.ImplicitPCHInclude);
608   }
609   if (!Opts.ImplicitPTHInclude.empty()) {
610     Res.push_back("-include-pth");
611     Res.push_back(Opts.ImplicitPTHInclude);
612   }
613   if (!Opts.TokenCache.empty()) {
614     if (Opts.ImplicitPTHInclude.empty()) {
615       Res.push_back("-token-cache");
616       Res.push_back(Opts.TokenCache);
617     } else
618       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
619              "Unsupported option combination!");
620   }
621   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
622     Res.push_back("-remap-file");
623     Res.push_back(Opts.RemappedFiles[i].first + ";" +
624                   Opts.RemappedFiles[i].second);
625   }
626 }
627 
628 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
629                                          std::vector<std::string> &Res) {
630   if (!Opts.ShowCPP && !Opts.ShowMacros)
631     llvm::report_fatal_error("Invalid option combination!");
632 
633   if (Opts.ShowCPP && Opts.ShowMacros)
634     Res.push_back("-dD");
635   else if (!Opts.ShowCPP && Opts.ShowMacros)
636     Res.push_back("-dM");
637 
638   if (!Opts.ShowLineMarkers)
639     Res.push_back("-P");
640   if (Opts.ShowComments)
641     Res.push_back("-C");
642   if (Opts.ShowMacroComments)
643     Res.push_back("-CC");
644 }
645 
646 static void TargetOptsToArgs(const TargetOptions &Opts,
647                              std::vector<std::string> &Res) {
648   Res.push_back("-triple");
649   Res.push_back(Opts.Triple);
650   if (!Opts.CPU.empty()) {
651     Res.push_back("-target-cpu");
652     Res.push_back(Opts.CPU);
653   }
654   if (!Opts.ABI.empty()) {
655     Res.push_back("-target-abi");
656     Res.push_back(Opts.ABI);
657   }
658   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
659     Res.push_back("-target-feature");
660     Res.push_back(Opts.Features[i]);
661   }
662 }
663 
664 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
665   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
666   CodeGenOptsToArgs(getCodeGenOpts(), Res);
667   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
668   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
669   FrontendOptsToArgs(getFrontendOpts(), Res);
670   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
671   LangOptsToArgs(getLangOpts(), Res);
672   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
673   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
674   TargetOptsToArgs(getTargetOpts(), Res);
675 }
676 
677 //===----------------------------------------------------------------------===//
678 // Deserialization (to args)
679 //===----------------------------------------------------------------------===//
680 
681 using namespace clang::driver;
682 using namespace clang::driver::cc1options;
683 
684 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
685                                        llvm::StringRef Default = "") {
686   if (Arg *A = Args.getLastArg(ID))
687     return A->getValue(Args);
688   return Default;
689 }
690 
691 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
692                               int Default, Diagnostic &Diags) {
693   Arg *A = Args.getLastArg(ID);
694   if (!A)
695     return Default;
696 
697   int Res = Default;
698   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
699     Diags.Report(diag::err_drv_invalid_int_value)
700         << A->getAsString(Args) << A->getValue(Args);
701 
702   return Res;
703 }
704 
705 static std::vector<std::string>
706 getAllArgValues(ArgList &Args, cc1options::ID ID) {
707   llvm::SmallVector<const char *, 16> Values;
708   Args.AddAllArgValues(Values, ID);
709   return std::vector<std::string>(Values.begin(), Values.end());
710 }
711 
712 //
713 
714 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
715                               Diagnostic &Diags) {
716   using namespace cc1options;
717 
718   Opts.AnalysisList.clear();
719 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
720   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
721 #include "clang/Frontend/Analyses.def"
722 
723   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
724     llvm::StringRef Name = A->getValue(Args);
725     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
726 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
727       .Case(CMDFLAG, NAME##Model)
728 #include "clang/Frontend/Analyses.def"
729       .Default(NumStores);
730     // FIXME: Error handling.
731     if (Value == NumStores)
732       Diags.Report(diag::err_drv_invalid_value)
733         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
734     else
735       Opts.AnalysisStoreOpt = Value;
736   }
737 
738   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
739     llvm::StringRef Name = A->getValue(Args);
740     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
741 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
742       .Case(CMDFLAG, NAME##Model)
743 #include "clang/Frontend/Analyses.def"
744       .Default(NumConstraints);
745     // FIXME: Error handling.
746     if (Value == NumConstraints)
747       Diags.Report(diag::err_drv_invalid_value)
748         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
749     else
750       Opts.AnalysisConstraintsOpt = Value;
751   }
752 
753   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
754     llvm::StringRef Name = A->getValue(Args);
755     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
756 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
757       .Case(CMDFLAG, PD_##NAME)
758 #include "clang/Frontend/Analyses.def"
759       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
760     // FIXME: Error handling.
761     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
762       Diags.Report(diag::err_drv_invalid_value)
763         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
764     else
765       Opts.AnalysisDiagOpt = Value;
766   }
767 
768   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
769   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
770   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
771   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
772   Opts.AnalyzeNestedBlocks =
773     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
774   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
775   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
776   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
777   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
778   Opts.EnableExperimentalInternalChecks =
779     Args.hasArg(OPT_analyzer_experimental_internal_checks);
780   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
781   Opts.MaxNodes = getLastArgIntValue(Args, OPT_analyzer_max_nodes,150000,Diags);
782 }
783 
784 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
785                              Diagnostic &Diags) {
786   using namespace cc1options;
787   // -Os implies -O2
788   if (Args.hasArg(OPT_Os))
789     Opts.OptimizationLevel = 2;
790   else {
791     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
792     if (Opts.OptimizationLevel > 3) {
793       Diags.Report(diag::err_drv_invalid_value)
794         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
795       Opts.OptimizationLevel = 3;
796     }
797   }
798 
799   // We must always run at least the always inlining pass.
800   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
801     : CodeGenOptions::OnlyAlwaysInlining;
802 
803   Opts.DebugInfo = Args.hasArg(OPT_g);
804   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
805   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
806   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
807   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
808   Opts.NoCommon = Args.hasArg(OPT_fno_common);
809   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
810   Opts.OptimizeSize = Args.hasArg(OPT_Os);
811   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
812 
813   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
814   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
815   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
816   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
817   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
818   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
819   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
820   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
821   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
822   Opts.ObjCLegacyDispatch = Args.hasArg(OPT_fobjc_legacy_dispatch);
823   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
824   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
825   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
826 
827   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
828   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
829 
830   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
831   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
832 }
833 
834 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
835                                       ArgList &Args) {
836   using namespace cc1options;
837   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
838   Opts.Targets = getAllArgValues(Args, OPT_MT);
839   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
840   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
841 }
842 
843 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
844                                 Diagnostic &Diags) {
845   using namespace cc1options;
846   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
847   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
848   Opts.Pedantic = Args.hasArg(OPT_pedantic);
849   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
850   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
851   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
852   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
853   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
854   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
855   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
856   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
857   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
858   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
859   Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
860   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
861                                     DiagnosticOptions::DefaultTabStop, Diags);
862   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
863     Diags.Report(diag::warn_ignoring_ftabstop_value)
864       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
865     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
866   }
867   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
868   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
869   Opts.Warnings = getAllArgValues(Args, OPT_W);
870 }
871 
872 static FrontendOptions::InputKind
873 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
874   using namespace cc1options;
875   Opts.ProgramAction = frontend::ParseSyntaxOnly;
876   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
877     switch (A->getOption().getID()) {
878     default:
879       assert(0 && "Invalid option in group!");
880     case OPT_ast_dump:
881       Opts.ProgramAction = frontend::ASTDump; break;
882     case OPT_ast_print:
883       Opts.ProgramAction = frontend::ASTPrint; break;
884     case OPT_ast_print_xml:
885       Opts.ProgramAction = frontend::ASTPrintXML; break;
886     case OPT_ast_view:
887       Opts.ProgramAction = frontend::ASTView; break;
888     case OPT_dump_raw_tokens:
889       Opts.ProgramAction = frontend::DumpRawTokens; break;
890     case OPT_dump_tokens:
891       Opts.ProgramAction = frontend::DumpTokens; break;
892     case OPT_S:
893       Opts.ProgramAction = frontend::EmitAssembly; break;
894     case OPT_emit_llvm_bc:
895       Opts.ProgramAction = frontend::EmitBC; break;
896     case OPT_emit_html:
897       Opts.ProgramAction = frontend::EmitHTML; break;
898     case OPT_emit_llvm:
899       Opts.ProgramAction = frontend::EmitLLVM; break;
900     case OPT_emit_llvm_only:
901       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
902     case OPT_emit_obj:
903       Opts.ProgramAction = frontend::EmitObj; break;
904     case OPT_fixit:
905       Opts.ProgramAction = frontend::FixIt; break;
906     case OPT_emit_pch:
907       Opts.ProgramAction = frontend::GeneratePCH; break;
908     case OPT_emit_pth:
909       Opts.ProgramAction = frontend::GeneratePTH; break;
910     case OPT_init_only:
911       Opts.ProgramAction = frontend::InitOnly; break;
912     case OPT_parse_noop:
913       Opts.ProgramAction = frontend::ParseNoop; break;
914     case OPT_parse_print_callbacks:
915       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
916     case OPT_fsyntax_only:
917       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
918     case OPT_print_decl_contexts:
919       Opts.ProgramAction = frontend::PrintDeclContext; break;
920     case OPT_E:
921       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
922     case OPT_rewrite_macros:
923       Opts.ProgramAction = frontend::RewriteMacros; break;
924     case OPT_rewrite_objc:
925       Opts.ProgramAction = frontend::RewriteObjC; break;
926     case OPT_rewrite_test:
927       Opts.ProgramAction = frontend::RewriteTest; break;
928     case OPT_analyze:
929       Opts.ProgramAction = frontend::RunAnalysis; break;
930     case OPT_Eonly:
931       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
932     }
933   }
934   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
935     Opts.ProgramAction = frontend::PluginAction;
936     Opts.ActionName = A->getValue(Args);
937   }
938 
939   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
940     Opts.CodeCompletionAt =
941       ParsedSourceLocation::FromString(A->getValue(Args));
942     if (Opts.CodeCompletionAt.FileName.empty())
943       Diags.Report(diag::err_drv_invalid_value)
944         << A->getAsString(Args) << A->getValue(Args);
945   }
946   Opts.DebugCodeCompletionPrinter =
947     !Args.hasArg(OPT_no_code_completion_debug_printer);
948   Opts.DisableFree = Args.hasArg(OPT_disable_free);
949 
950   Opts.FixItLocations.clear();
951   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
952          ie = Args.filtered_end(); it != ie; ++it) {
953     const char *Loc = it->getValue(Args);
954     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
955 
956     if (PSL.FileName.empty()) {
957       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
958       continue;
959     }
960 
961     Opts.FixItLocations.push_back(PSL);
962   }
963 
964   Opts.OutputFile = getLastArgValue(Args, OPT_o);
965   Opts.Plugins = getAllArgValues(Args, OPT_load);
966   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
967   Opts.ShowHelp = Args.hasArg(OPT_help);
968   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
969   Opts.ShowStats = Args.hasArg(OPT_print_stats);
970   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
971   Opts.ShowVersion = Args.hasArg(OPT_version);
972   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
973   Opts.ASTMergeFiles = getAllArgValues(Args, OPT_ast_merge);
974   Opts.LLVMArgs = getAllArgValues(Args, OPT_mllvm);
975 
976   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
977   if (const Arg *A = Args.getLastArg(OPT_x)) {
978     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
979       .Case("c", FrontendOptions::IK_C)
980       .Case("cl", FrontendOptions::IK_OpenCL)
981       .Case("c", FrontendOptions::IK_C)
982       .Case("cl", FrontendOptions::IK_OpenCL)
983       .Case("c++", FrontendOptions::IK_CXX)
984       .Case("objective-c", FrontendOptions::IK_ObjC)
985       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
986       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
987       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
988       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
989       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
990       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
991       .Case("c-header", FrontendOptions::IK_C)
992       .Case("objective-c-header", FrontendOptions::IK_ObjC)
993       .Case("c++-header", FrontendOptions::IK_CXX)
994       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
995       .Case("ast", FrontendOptions::IK_AST)
996       .Default(FrontendOptions::IK_None);
997     if (DashX == FrontendOptions::IK_None)
998       Diags.Report(diag::err_drv_invalid_value)
999         << A->getAsString(Args) << A->getValue(Args);
1000   }
1001 
1002   // '-' is the default input if none is given.
1003   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
1004   Opts.Inputs.clear();
1005   if (Inputs.empty())
1006     Inputs.push_back("-");
1007   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1008     FrontendOptions::InputKind IK = DashX;
1009     if (IK == FrontendOptions::IK_None) {
1010       IK = FrontendOptions::getInputKindForExtension(
1011         llvm::StringRef(Inputs[i]).rsplit('.').second);
1012       // FIXME: Remove this hack.
1013       if (i == 0)
1014         DashX = IK;
1015     }
1016     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1017   }
1018 
1019   return DashX;
1020 }
1021 
1022 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1023                                                  void *MainAddr) {
1024   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1025 
1026   if (!P.isEmpty()) {
1027     P.eraseComponent();  // Remove /clang from foo/bin/clang
1028     P.eraseComponent();  // Remove /bin   from foo/bin
1029 
1030     // Get foo/lib/clang/<version>/include
1031     P.appendComponent("lib");
1032     P.appendComponent("clang");
1033     P.appendComponent(CLANG_VERSION_STRING);
1034   }
1035 
1036   return P.str();
1037 }
1038 
1039 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1040   using namespace cc1options;
1041   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
1042   Opts.Verbose = Args.hasArg(OPT_v);
1043   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1044   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1045   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1046   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
1047 
1048   // Add -I... and -F... options in order.
1049   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1050          ie = Args.filtered_end(); it != ie; ++it)
1051     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1052                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1053 
1054   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1055   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1056   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1057                                              OPT_iwithprefixbefore),
1058          ie = Args.filtered_end(); it != ie; ++it) {
1059     if (it->getOption().matches(OPT_iprefix))
1060       Prefix = it->getValue(Args);
1061     else if (it->getOption().matches(OPT_iwithprefix))
1062       Opts.AddPath(Prefix.str() + it->getValue(Args),
1063                    frontend::System, false, false);
1064     else
1065       Opts.AddPath(Prefix.str() + it->getValue(Args),
1066                    frontend::Angled, false, false);
1067   }
1068 
1069   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1070          ie = Args.filtered_end(); it != ie; ++it)
1071     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1072   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1073          ie = Args.filtered_end(); it != ie; ++it)
1074     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1075   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1076          ie = Args.filtered_end(); it != ie; ++it)
1077     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1078 
1079   // FIXME: Need options for the various environment variables!
1080 }
1081 
1082 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1083                           FrontendOptions::InputKind IK,
1084                           Diagnostic &Diags) {
1085   // FIXME: Cleanup per-file based stuff.
1086 
1087   // Set some properties which depend soley on the input kind; it would be nice
1088   // to move these to the language standard, and have the driver resolve the
1089   // input kind + language standard.
1090   if (IK == FrontendOptions::IK_Asm) {
1091     Opts.AsmPreprocessor = 1;
1092   } else if (IK == FrontendOptions::IK_ObjC ||
1093              IK == FrontendOptions::IK_ObjCXX ||
1094              IK == FrontendOptions::IK_PreprocessedObjC ||
1095              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1096     Opts.ObjC1 = Opts.ObjC2 = 1;
1097   }
1098 
1099   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1100   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1101     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1102 #define LANGSTANDARD(id, name, desc, features) \
1103       .Case(name, LangStandard::lang_##id)
1104 #include "clang/Frontend/LangStandards.def"
1105       .Default(LangStandard::lang_unspecified);
1106     if (LangStd == LangStandard::lang_unspecified)
1107       Diags.Report(diag::err_drv_invalid_value)
1108         << A->getAsString(Args) << A->getValue(Args);
1109   }
1110 
1111   if (LangStd == LangStandard::lang_unspecified) {
1112     // Based on the base language, pick one.
1113     switch (IK) {
1114     case FrontendOptions::IK_None:
1115     case FrontendOptions::IK_AST:
1116       assert(0 && "Invalid input kind!");
1117     case FrontendOptions::IK_OpenCL:
1118       LangStd = LangStandard::lang_opencl;
1119       break;
1120     case FrontendOptions::IK_Asm:
1121     case FrontendOptions::IK_C:
1122     case FrontendOptions::IK_PreprocessedC:
1123     case FrontendOptions::IK_ObjC:
1124     case FrontendOptions::IK_PreprocessedObjC:
1125       LangStd = LangStandard::lang_gnu99;
1126       break;
1127     case FrontendOptions::IK_CXX:
1128     case FrontendOptions::IK_PreprocessedCXX:
1129     case FrontendOptions::IK_ObjCXX:
1130     case FrontendOptions::IK_PreprocessedObjCXX:
1131       LangStd = LangStandard::lang_gnucxx98;
1132       break;
1133     }
1134   }
1135 
1136   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1137   Opts.BCPLComment = Std.hasBCPLComments();
1138   Opts.C99 = Std.isC99();
1139   Opts.CPlusPlus = Std.isCPlusPlus();
1140   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1141   Opts.Digraphs = Std.hasDigraphs();
1142   Opts.GNUMode = Std.isGNUMode();
1143   Opts.GNUInline = !Std.isC99();
1144   Opts.HexFloats = Std.hasHexFloats();
1145   Opts.ImplicitInt = Std.hasImplicitInt();
1146 
1147   // OpenCL has some additional defaults.
1148   if (LangStd == LangStandard::lang_opencl) {
1149     Opts.OpenCL = 1;
1150     Opts.AltiVec = 1;
1151     Opts.CXXOperatorNames = 1;
1152     Opts.LaxVectorConversions = 1;
1153   }
1154 
1155   // OpenCL and C++ both have bool, true, false keywords.
1156   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1157 
1158   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1159   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1160   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1161   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1162   // name, as it doesn't seem a useful distinction.
1163   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1164                                   Opts.GNUMode);
1165 
1166   if (Opts.CPlusPlus)
1167     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1168 
1169   if (Args.hasArg(OPT_fobjc_gc_only))
1170     Opts.setGCMode(LangOptions::GCOnly);
1171   else if (Args.hasArg(OPT_fobjc_gc))
1172     Opts.setGCMode(LangOptions::HybridGC);
1173 
1174   if (Args.hasArg(OPT_print_ivar_layout))
1175     Opts.ObjCGCBitmapPrint = 1;
1176 
1177   if (Args.hasArg(OPT_faltivec))
1178     Opts.AltiVec = 1;
1179 
1180   if (Args.hasArg(OPT_pthread))
1181     Opts.POSIXThreads = 1;
1182 
1183   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1184                                         "default");
1185   if (Vis == "default")
1186     Opts.setVisibilityMode(LangOptions::Default);
1187   else if (Vis == "hidden")
1188     Opts.setVisibilityMode(LangOptions::Hidden);
1189   else if (Vis == "protected")
1190     Opts.setVisibilityMode(LangOptions::Protected);
1191   else
1192     Diags.Report(diag::err_drv_invalid_value)
1193       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1194 
1195   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1196 
1197   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1198   // is specified, or -std is set to a conforming mode.
1199   Opts.Trigraphs = !Opts.GNUMode;
1200   if (Args.hasArg(OPT_trigraphs))
1201     Opts.Trigraphs = 1;
1202 
1203   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1204                                    OPT_fno_dollars_in_identifiers,
1205                                    !Opts.AsmPreprocessor);
1206   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1207   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1208   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1209   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1210   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1211     Opts.LaxVectorConversions = 0;
1212   if (Args.hasArg(OPT_fno_threadsafe_statics))
1213     Opts.ThreadsafeStatics = 0;
1214   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1215   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1216   Opts.Blocks = Args.hasArg(OPT_fblocks);
1217   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1218   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1219   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1220   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1221   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1222   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1223   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1224   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1225   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1226   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1227                                                Diags);
1228   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1229   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1230                                                  OPT_fconstant_string_class);
1231   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1232   Opts.ObjCNonFragileABI2 = Args.hasArg(OPT_fobjc_nonfragile_abi2);
1233   if (Opts.ObjCNonFragileABI2)
1234     Opts.ObjCNonFragileABI = true;
1235   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1236   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1237   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1238   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1239   Opts.Static = Args.hasArg(OPT_static_define);
1240   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1241   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1242   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1243   Opts.OptimizeSize = 0;
1244 
1245   // FIXME: Eliminate this dependency.
1246   unsigned Opt =
1247     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1248   Opts.Optimize = Opt != 0;
1249 
1250   // This is the __NO_INLINE__ define, which just depends on things like the
1251   // optimization level and -fno-inline, not actually whether the backend has
1252   // inlining enabled.
1253   //
1254   // FIXME: This is affected by other options (-fno-inline).
1255   Opts.NoInline = !Opt;
1256 
1257   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1258   switch (SSP) {
1259   default:
1260     Diags.Report(diag::err_drv_invalid_value)
1261       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1262     break;
1263   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1264   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1265   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1266   }
1267 }
1268 
1269 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1270                                   Diagnostic &Diags) {
1271   using namespace cc1options;
1272   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1273   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1274   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1275       Opts.TokenCache = A->getValue(Args);
1276   else
1277     Opts.TokenCache = Opts.ImplicitPTHInclude;
1278   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1279   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1280   // Add macros from the command line.
1281   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1282          ie = Args.filtered_end(); it != ie; ++it) {
1283     if (it->getOption().matches(OPT_D))
1284       Opts.addMacroDef(it->getValue(Args));
1285     else
1286       Opts.addMacroUndef(it->getValue(Args));
1287   }
1288 
1289   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1290 
1291   // Add the ordered list of -includes.
1292   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1293                                              OPT_include_pth),
1294          ie = Args.filtered_end(); it != ie; ++it) {
1295     // PCH is handled specially, we need to extra the original include path.
1296     if (it->getOption().matches(OPT_include_pch)) {
1297       std::string OriginalFile =
1298         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1299       if (OriginalFile.empty())
1300         continue;
1301 
1302       Opts.Includes.push_back(OriginalFile);
1303     } else
1304       Opts.Includes.push_back(it->getValue(Args));
1305   }
1306 
1307   // Include 'altivec.h' if -faltivec option present
1308   if (Args.hasArg(OPT_faltivec))
1309     Opts.Includes.push_back("altivec.h");
1310 
1311   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1312          ie = Args.filtered_end(); it != ie; ++it) {
1313     std::pair<llvm::StringRef,llvm::StringRef> Split =
1314       llvm::StringRef(it->getValue(Args)).split(';');
1315 
1316     if (Split.second.empty()) {
1317       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1318       continue;
1319     }
1320 
1321     Opts.addRemappedFile(Split.first, Split.second);
1322   }
1323 }
1324 
1325 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1326                                         ArgList &Args) {
1327   using namespace cc1options;
1328   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1329   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1330   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1331   Opts.ShowComments = Args.hasArg(OPT_C);
1332   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1333 }
1334 
1335 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1336   using namespace cc1options;
1337   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1338   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1339   Opts.Triple = getLastArgValue(Args, OPT_triple);
1340   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1341 
1342   // Use the host triple if unspecified.
1343   if (Opts.Triple.empty())
1344     Opts.Triple = llvm::sys::getHostTriple();
1345 }
1346 
1347 //
1348 
1349 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1350                                         const char **ArgBegin,
1351                                         const char **ArgEnd,
1352                                         Diagnostic &Diags) {
1353   // Parse the arguments.
1354   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1355   unsigned MissingArgIndex, MissingArgCount;
1356   llvm::OwningPtr<InputArgList> Args(
1357     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1358 
1359   // Check for missing argument error.
1360   if (MissingArgCount)
1361     Diags.Report(diag::err_drv_missing_argument)
1362       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1363 
1364   // Issue errors on unknown arguments.
1365   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1366          ie = Args->filtered_end(); it != ie; ++it)
1367     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1368 
1369   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1370   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1371   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1372   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1373   FrontendOptions::InputKind DashX =
1374     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1375   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1376   if (DashX != FrontendOptions::IK_AST)
1377     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1378   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1379   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1380   ParseTargetArgs(Res.getTargetOpts(), *Args);
1381 }
1382