xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision da7a52289fbdd02923e24b21c5b73ab7eef42ae6) 
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::llvm_unreachable("Unknown analysis store!");
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::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::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::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.EagerlyAssume)
100     Res.push_back("-analyzer-eagerly-assume");
101   if (!Opts.PurgeDead)
102     Res.push_back("-analyzer-no-purge-dead");
103   if (Opts.TrimGraph)
104     Res.push_back("-trim-egraph");
105   if (Opts.VisualizeEGDot)
106     Res.push_back("-analyzer-viz-egraph-graphviz");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-ubigraph");
109   if (Opts.EnableExperimentalChecks)
110     Res.push_back("-analyzer-experimental-checks");
111   if (Opts.EnableExperimentalInternalChecks)
112     Res.push_back("-analyzer-experimental-internal-checks");
113 }
114 
115 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
116                               std::vector<std::string> &Res) {
117   if (Opts.DebugInfo)
118     Res.push_back("-g");
119   if (Opts.DisableLLVMOpts)
120     Res.push_back("-disable-llvm-optzns");
121   if (Opts.DisableRedZone)
122     Res.push_back("-disable-red-zone");
123   if (!Opts.MergeAllConstants)
124     Res.push_back("-fno-merge-all-constants");
125   if (Opts.NoCommon)
126     Res.push_back("-fno-common");
127   if (Opts.NoImplicitFloat)
128     Res.push_back("-no-implicit-float");
129   if (Opts.OptimizeSize) {
130     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
131     Res.push_back("-Os");
132   } else if (Opts.OptimizationLevel != 0)
133     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
134   if (!Opts.MainFileName.empty()) {
135     Res.push_back("-main-file-name");
136     Res.push_back(Opts.MainFileName);
137   }
138   // SimplifyLibCalls is only derived.
139   // TimePasses is only derived.
140   // UnitAtATime is unused.
141   // UnrollLoops is only derived.
142   // VerifyModule is only derived.
143   // Inlining is only derived.
144 
145   if (Opts.AsmVerbose)
146     Res.push_back("-masm-verbose");
147   if (!Opts.CodeModel.empty()) {
148     Res.push_back("-mcode-model");
149     Res.push_back(Opts.CodeModel);
150   }
151   if (!Opts.DebugPass.empty()) {
152     Res.push_back("-mdebug-pass");
153     Res.push_back(Opts.DebugPass);
154   }
155   if (Opts.DisableFPElim)
156     Res.push_back("-mdisable-fp-elim");
157   if (!Opts.FloatABI.empty()) {
158     Res.push_back("-mfloat-abi");
159     Res.push_back(Opts.FloatABI);
160   }
161   if (!Opts.LimitFloatPrecision.empty()) {
162     Res.push_back("-mlimit-float-precision");
163     Res.push_back(Opts.LimitFloatPrecision);
164   }
165   if (Opts.NoZeroInitializedInBSS)
166     Res.push_back("-mno-zero-initialized-bss");
167   if (Opts.SoftFloat)
168     Res.push_back("-msoft-float");
169   if (Opts.UnwindTables)
170     Res.push_back("-munwind-tables");
171   if (Opts.RelocationModel != "pic") {
172     Res.push_back("-mrelocation-model");
173     Res.push_back(Opts.RelocationModel);
174   }
175 }
176 
177 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
178                                        std::vector<std::string> &Res) {
179   if (Opts.IncludeSystemHeaders)
180     Res.push_back("-sys-header-deps");
181   if (Opts.UsePhonyTargets)
182     Res.push_back("-MP");
183   if (!Opts.OutputFile.empty()) {
184     Res.push_back("-dependency-file");
185     Res.push_back(Opts.OutputFile);
186   }
187   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
188     Res.push_back("-MT");
189     Res.push_back(Opts.Targets[i]);
190   }
191 }
192 
193 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
194                                  std::vector<std::string> &Res) {
195   if (Opts.IgnoreWarnings)
196     Res.push_back("-w");
197   if (Opts.NoRewriteMacros)
198     Res.push_back("-Wno-rewrite-macros");
199   if (Opts.Pedantic)
200     Res.push_back("-pedantic");
201   if (Opts.PedanticErrors)
202     Res.push_back("-pedantic-errors");
203   if (!Opts.ShowColumn)
204     Res.push_back("-fno-show-column");
205   if (!Opts.ShowLocation)
206     Res.push_back("-fno-show-source-location");
207   if (!Opts.ShowCarets)
208     Res.push_back("-fno-caret-diagnostics");
209   if (!Opts.ShowFixits)
210     Res.push_back("-fno-diagnostics-fixit-info");
211   if (Opts.ShowSourceRanges)
212     Res.push_back("-fdiagnostics-print-source-range-info");
213   if (Opts.ShowColors)
214     Res.push_back("-fcolor-diagnostics");
215   if (Opts.VerifyDiagnostics)
216     Res.push_back("-verify");
217   if (Opts.ShowOptionNames)
218     Res.push_back("-fdiagnostics-show-option");
219   if (Opts.MessageLength) {
220     Res.push_back("-fmessage-length");
221     Res.push_back(llvm::utostr(Opts.MessageLength));
222   }
223   if (!Opts.DumpBuildInformation.empty()) {
224     Res.push_back("-dump-build-information");
225     Res.push_back(Opts.DumpBuildInformation);
226   }
227   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
228     Res.push_back("-W" + Opts.Warnings[i]);
229 }
230 
231 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
232   switch (Kind) {
233   case FrontendOptions::IK_None:              break;
234   case FrontendOptions::IK_AST:               return "ast";
235   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
236   case FrontendOptions::IK_C:                 return "c";
237   case FrontendOptions::IK_CXX:               return "c++";
238   case FrontendOptions::IK_ObjC:              return "objective-c";
239   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
240   case FrontendOptions::IK_OpenCL:            return "cl";
241   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
242   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
243   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
244   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
245   }
246 
247   llvm::llvm_unreachable("Unexpected language kind!");
248   return 0;
249 }
250 
251 static const char *getActionName(frontend::ActionKind Kind) {
252   switch (Kind) {
253   case frontend::PluginAction:
254   case frontend::InheritanceView:
255     llvm::llvm_unreachable("Invalid kind!");
256 
257   case frontend::ASTDump:                return "-ast-dump";
258   case frontend::ASTPrint:               return "-ast-print";
259   case frontend::ASTPrintXML:            return "-ast-print-xml";
260   case frontend::ASTView:                return "-ast-view";
261   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
262   case frontend::DumpRecordLayouts:      return "-dump-record-layouts";
263   case frontend::DumpTokens:             return "-dump-tokens";
264   case frontend::EmitAssembly:           return "-S";
265   case frontend::EmitBC:                 return "-emit-llvm-bc";
266   case frontend::EmitHTML:               return "-emit-html";
267   case frontend::EmitLLVM:               return "-emit-llvm";
268   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
269   case frontend::FixIt:                  return "-fixit";
270   case frontend::GeneratePCH:            return "-emit-pch";
271   case frontend::GeneratePTH:            return "-emit-pth";
272   case frontend::ParseNoop:              return "-parse-noop";
273   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
274   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
275   case frontend::PrintDeclContext:       return "-print-decl-contexts";
276   case frontend::PrintPreprocessedInput: return "-E";
277   case frontend::RewriteBlocks:          return "-rewrite-blocks";
278   case frontend::RewriteMacros:          return "-rewrite-macros";
279   case frontend::RewriteObjC:            return "-rewrite-objc";
280   case frontend::RewriteTest:            return "-rewrite-test";
281   case frontend::RunAnalysis:            return "-analyze";
282   case frontend::RunPreprocessorOnly:    return "-Eonly";
283   }
284 
285   llvm::llvm_unreachable("Unexpected language kind!");
286   return 0;
287 }
288 
289 static void FrontendOptsToArgs(const FrontendOptions &Opts,
290                                std::vector<std::string> &Res) {
291   if (!Opts.DebugCodeCompletionPrinter)
292     Res.push_back("-no-code-completion-debug-printer");
293   if (Opts.DisableFree)
294     Res.push_back("-disable-free");
295   if (Opts.EmptyInputOnly)
296     Res.push_back("-empty-input-only");
297   if (Opts.RelocatablePCH)
298     Res.push_back("-relocatable-pch");
299   if (Opts.ShowMacrosInCodeCompletion)
300     Res.push_back("-code-completion-macros");
301   if (Opts.ShowStats)
302     Res.push_back("-print-stats");
303   if (Opts.ShowTimers)
304     Res.push_back("-ftime-report");
305 
306   bool NeedLang = false;
307   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
308     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
309         Opts.Inputs[i].first)
310       NeedLang = true;
311   if (NeedLang) {
312     Res.push_back("-x");
313     Res.push_back(getInputKindName(Opts.Inputs[0].first));
314   }
315   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
316     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
317            "Unable to represent this input vector!");
318     Res.push_back(Opts.Inputs[i].second);
319   }
320 
321   if (!Opts.OutputFile.empty()) {
322     Res.push_back("-o");
323     Res.push_back(Opts.OutputFile);
324   }
325   if (!Opts.ViewClassInheritance.empty()) {
326     Res.push_back("-cxx-inheritance-view");
327     Res.push_back(Opts.ViewClassInheritance);
328   }
329   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
330     Res.push_back("-fixit-at");
331     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
332                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
333                   llvm::utostr(Opts.FixItLocations[i].Column));
334   }
335   if (!Opts.CodeCompletionAt.FileName.empty()) {
336     Res.push_back("-code-completion-at");
337     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
338                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
339                   llvm::utostr(Opts.CodeCompletionAt.Column));
340   }
341   if (Opts.ProgramAction != frontend::InheritanceView &&
342       Opts.ProgramAction != frontend::PluginAction)
343     Res.push_back(getActionName(Opts.ProgramAction));
344   if (!Opts.ActionName.empty()) {
345     Res.push_back("-plugin");
346     Res.push_back(Opts.ActionName);
347   }
348   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
349     Res.push_back("-load");
350     Res.push_back(Opts.Plugins[i]);
351   }
352 }
353 
354 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
355                                    std::vector<std::string> &Res) {
356   if (Opts.Sysroot != "/") {
357     Res.push_back("-isysroot");
358     Res.push_back(Opts.Sysroot);
359   }
360 
361   /// User specified include entries.
362   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
363     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
364     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
365       llvm::llvm_report_error("Invalid option set!");
366     if (E.IsUserSupplied) {
367       if (E.Group == frontend::After) {
368         Res.push_back("-idirafter");
369       } else if (E.Group == frontend::Quoted) {
370         Res.push_back("-iquote");
371       } else if (E.Group == frontend::System) {
372         Res.push_back("-isystem");
373       } else {
374         assert(E.Group == frontend::Angled && "Invalid group!");
375         Res.push_back(E.IsFramework ? "-F" : "-I");
376       }
377     } else {
378       if (E.Group != frontend::Angled && E.Group != frontend::System)
379         llvm::llvm_report_error("Invalid option set!");
380       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
381                     "-iwithprefix");
382     }
383     Res.push_back(E.Path);
384   }
385 
386   if (!Opts.EnvIncPath.empty()) {
387     // FIXME: Provide an option for this, and move env detection to driver.
388     llvm::llvm_report_error("Not yet implemented!");
389   }
390   if (!Opts.CEnvIncPath.empty()) {
391     // FIXME: Provide an option for this, and move env detection to driver.
392     llvm::llvm_report_error("Not yet implemented!");
393   }
394   if (!Opts.ObjCEnvIncPath.empty()) {
395     // FIXME: Provide an option for this, and move env detection to driver.
396     llvm::llvm_report_error("Not yet implemented!");
397   }
398   if (!Opts.CXXEnvIncPath.empty()) {
399     // FIXME: Provide an option for this, and move env detection to driver.
400     llvm::llvm_report_error("Not yet implemented!");
401   }
402   if (!Opts.ObjCXXEnvIncPath.empty()) {
403     // FIXME: Provide an option for this, and move env detection to driver.
404     llvm::llvm_report_error("Not yet implemented!");
405   }
406   if (!Opts.BuiltinIncludePath.empty()) {
407     // FIXME: Provide an option for this, and move to driver.
408   }
409   if (!Opts.UseStandardIncludes)
410     Res.push_back("-nostdinc");
411   if (Opts.Verbose)
412     Res.push_back("-v");
413 }
414 
415 static void LangOptsToArgs(const LangOptions &Opts,
416                            std::vector<std::string> &Res) {
417   LangOptions DefaultLangOpts;
418 
419   // FIXME: Need to set -std to get all the implicit options.
420 
421   // FIXME: We want to only pass options relative to the defaults, which
422   // requires constructing a target. :(
423   //
424   // It would be better to push the all target specific choices into the driver,
425   // so that everything below that was more uniform.
426 
427   if (Opts.Trigraphs)
428     Res.push_back("-trigraphs");
429   // Implicit based on the input kind:
430   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
431   // Implicit based on the input language standard:
432   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
433   if (Opts.DollarIdents)
434     Res.push_back("-fdollars-in-identifiers");
435   if (Opts.Microsoft)
436     Res.push_back("-fms-extensions=1");
437   if (Opts.ObjCNonFragileABI)
438     Res.push_back("-fobjc-nonfragile-abi");
439   // NoInline is implicit.
440   if (!Opts.CXXOperatorNames)
441     Res.push_back("-fno-operator-names");
442   if (Opts.PascalStrings)
443     Res.push_back("-fpascal-strings");
444   if (Opts.WritableStrings)
445     Res.push_back("-fwritable-strings");
446   if (!Opts.LaxVectorConversions)
447     Res.push_back("-fno-lax-vector-conversions");
448   if (Opts.AltiVec)
449     Res.push_back("-faltivec");
450   if (Opts.Exceptions)
451     Res.push_back("-fexceptions");
452   if (!Opts.RTTI)
453     Res.push_back("-fno-rtti");
454   if (!Opts.NeXTRuntime)
455     Res.push_back("-fgnu-runtime");
456   if (Opts.Freestanding)
457     Res.push_back("-ffreestanding");
458   if (Opts.NoBuiltin)
459     Res.push_back("-fno-builtin");
460   if (Opts.ThreadsafeStatics)
461     llvm::llvm_report_error("FIXME: Not yet implemented!");
462   if (Opts.POSIXThreads)
463     Res.push_back("-pthread");
464   if (Opts.Blocks)
465     Res.push_back("-fblocks");
466   if (Opts.EmitAllDecls)
467     Res.push_back("-femit-all-decls");
468   if (!Opts.MathErrno)
469     Res.push_back("-fno-math-errno");
470   if (Opts.OverflowChecking)
471     Res.push_back("-ftrapv");
472   if (Opts.HeinousExtensions)
473     Res.push_back("-fheinous-gnu-extensions");
474   // Optimize is implicit.
475   // OptimizeSize is implicit.
476   if (Opts.Static)
477     Res.push_back("-static-define");
478   if (Opts.PICLevel) {
479     Res.push_back("-pic-level");
480     Res.push_back(llvm::utostr(Opts.PICLevel));
481   }
482   if (Opts.ObjCGCBitmapPrint)
483     Res.push_back("-print-ivar-layout");
484   // FIXME: Don't forget to update when the default changes!
485   if (Opts.AccessControl)
486     Res.push_back("-faccess-control");
487   if (!Opts.CharIsSigned)
488     Res.push_back("-fno-signed-char");
489   if (Opts.ShortWChar)
490     Res.push_back("-fshort-wchar");
491   if (!Opts.ElideConstructors)
492     Res.push_back("-fno-elide-constructors");
493   if (Opts.getGCMode() != LangOptions::NonGC) {
494     if (Opts.getGCMode() == LangOptions::HybridGC) {
495       Res.push_back("-fobjc-gc");
496     } else {
497       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
498       Res.push_back("-fobjc-gc-only");
499     }
500   }
501   if (Opts.getVisibilityMode() != LangOptions::Default) {
502     Res.push_back("-fvisibility");
503     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
504       Res.push_back("hidden");
505     } else {
506       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
507              "Invalid visibility!");
508       Res.push_back("protected");
509     }
510   }
511   if (Opts.getStackProtectorMode() != 0) {
512     Res.push_back("-stack-protector");
513     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
514   }
515   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
516     Res.push_back("-ftemplate-depth");
517     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
518   }
519   if (!Opts.ObjCConstantStringClass.empty()) {
520     Res.push_back("-fconstant-string-class");
521     Res.push_back(Opts.ObjCConstantStringClass);
522   }
523 }
524 
525 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
526                                    std::vector<std::string> &Res) {
527   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
528     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
529                   Opts.Macros[i].first);
530   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
531     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
532     Res.push_back("-include");
533     Res.push_back(Opts.Includes[i]);
534   }
535   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
536     Res.push_back("-imacros");
537     Res.push_back(Opts.MacroIncludes[i]);
538   }
539   if (!Opts.UsePredefines)
540     Res.push_back("-undef");
541   if (!Opts.ImplicitPCHInclude.empty()) {
542     Res.push_back("-include-pch");
543     Res.push_back(Opts.ImplicitPCHInclude);
544   }
545   if (!Opts.ImplicitPTHInclude.empty()) {
546     Res.push_back("-include-pth");
547     Res.push_back(Opts.ImplicitPTHInclude);
548   }
549   if (!Opts.TokenCache.empty()) {
550     if (Opts.ImplicitPTHInclude.empty()) {
551       Res.push_back("-token-cache");
552       Res.push_back(Opts.TokenCache);
553     } else
554       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
555              "Unsupported option combination!");
556   }
557 }
558 
559 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
560                                          std::vector<std::string> &Res) {
561   if (!Opts.ShowCPP && !Opts.ShowMacros)
562     llvm::llvm_report_error("Invalid option combination!");
563 
564   if (Opts.ShowCPP && Opts.ShowMacros)
565     Res.push_back("-dD");
566   else if (!Opts.ShowCPP && Opts.ShowMacros)
567     Res.push_back("-dM");
568 
569   if (!Opts.ShowLineMarkers)
570     Res.push_back("-P");
571   if (Opts.ShowComments)
572     Res.push_back("-C");
573   if (Opts.ShowMacroComments)
574     Res.push_back("-CC");
575 }
576 
577 static void TargetOptsToArgs(const TargetOptions &Opts,
578                              std::vector<std::string> &Res) {
579   Res.push_back("-triple");
580   Res.push_back(Opts.Triple);
581   if (!Opts.CPU.empty()) {
582     Res.push_back("-mcpu");
583     Res.push_back(Opts.CPU);
584   }
585   if (!Opts.ABI.empty()) {
586     Res.push_back("-target-abi");
587     Res.push_back(Opts.ABI);
588   }
589   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
590     Res.push_back("-target-feature");
591     Res.push_back(Opts.Features[i]);
592   }
593 }
594 
595 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
596   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
597   CodeGenOptsToArgs(getCodeGenOpts(), Res);
598   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
599   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
600   FrontendOptsToArgs(getFrontendOpts(), Res);
601   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
602   LangOptsToArgs(getLangOpts(), Res);
603   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
604   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
605   TargetOptsToArgs(getTargetOpts(), Res);
606 }
607 
608 //===----------------------------------------------------------------------===//
609 // Deserialization (to args)
610 //===----------------------------------------------------------------------===//
611 
612 using namespace clang::driver;
613 using namespace clang::driver::cc1options;
614 
615 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
616                                        llvm::StringRef Default = "") {
617   if (Arg *A = Args.getLastArg(ID))
618     return A->getValue(Args);
619   return Default;
620 }
621 
622 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
623                               int Default, Diagnostic &Diags) {
624   Arg *A = Args.getLastArg(ID);
625   if (!A)
626     return Default;
627 
628   int Res = Default;
629   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
630     Diags.Report(diag::err_drv_invalid_int_value)
631         << A->getAsString(Args) << A->getValue(Args);
632 
633   return Res;
634 }
635 
636 static std::vector<std::string>
637 getAllArgValues(ArgList &Args, cc1options::ID ID) {
638   llvm::SmallVector<const char *, 16> Values;
639   Args.AddAllArgValues(Values, ID);
640   return std::vector<std::string>(Values.begin(), Values.end());
641 }
642 
643 //
644 
645 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
646                               Diagnostic &Diags) {
647   using namespace cc1options;
648 
649   Opts.AnalysisList.clear();
650 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
651   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
652 #include "clang/Frontend/Analyses.def"
653 
654   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
655     llvm::StringRef Name = A->getValue(Args);
656     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
657 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
658       .Case(CMDFLAG, NAME##Model)
659 #include "clang/Frontend/Analyses.def"
660       .Default(NumStores);
661     // FIXME: Error handling.
662     if (Value == NumStores)
663       Diags.Report(diag::err_drv_invalid_value)
664         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
665     else
666       Opts.AnalysisStoreOpt = Value;
667   }
668 
669   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
670     llvm::StringRef Name = A->getValue(Args);
671     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
672 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
673       .Case(CMDFLAG, NAME##Model)
674 #include "clang/Frontend/Analyses.def"
675       .Default(NumConstraints);
676     // FIXME: Error handling.
677     if (Value == NumConstraints)
678       Diags.Report(diag::err_drv_invalid_value)
679         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
680     else
681       Opts.AnalysisConstraintsOpt = Value;
682   }
683 
684   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
685     llvm::StringRef Name = A->getValue(Args);
686     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
687 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
688       .Case(CMDFLAG, PD_##NAME)
689 #include "clang/Frontend/Analyses.def"
690       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
691     // FIXME: Error handling.
692     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
693       Diags.Report(diag::err_drv_invalid_value)
694         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
695     else
696       Opts.AnalysisDiagOpt = Value;
697   }
698 
699   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
700   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
701   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
702   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
703   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
704   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
705   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
706   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
707   Opts.EnableExperimentalInternalChecks =
708     Args.hasArg(OPT_analyzer_experimental_internal_checks);
709   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
710 }
711 
712 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
713                              Diagnostic &Diags) {
714   using namespace cc1options;
715   // -Os implies -O2
716   if (Args.hasArg(OPT_Os))
717     Opts.OptimizationLevel = 2;
718   else {
719     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
720     if (Opts.OptimizationLevel > 3) {
721       Diags.Report(diag::err_drv_invalid_value)
722         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
723       Opts.OptimizationLevel = 3;
724     }
725   }
726 
727   // We must always run at least the always inlining pass.
728   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
729     : CodeGenOptions::OnlyAlwaysInlining;
730 
731   Opts.DebugInfo = Args.hasArg(OPT_g);
732   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
733   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
734   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
735   Opts.NoCommon = Args.hasArg(OPT_fno_common);
736   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
737   Opts.OptimizeSize = Args.hasArg(OPT_Os);
738   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
739 
740   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
741   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
742   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
743   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
744   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
745   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
746   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
747   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
748   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
749   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
750 
751   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
752 
753   // FIXME: Put elsewhere?
754 #ifdef NDEBUG
755   Opts.VerifyModule = 0;
756 #else
757   Opts.VerifyModule = 1;
758 #endif
759 }
760 
761 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
762                                       ArgList &Args) {
763   using namespace cc1options;
764   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
765   Opts.Targets = getAllArgValues(Args, OPT_MT);
766   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
767   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
768 }
769 
770 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
771                                 Diagnostic &Diags) {
772   using namespace cc1options;
773   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
774   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
775   Opts.Pedantic = Args.hasArg(OPT_pedantic);
776   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
777   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
778   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
779   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
780   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
781   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
782   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
783   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
784   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
785   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
786   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
787   Opts.Warnings = getAllArgValues(Args, OPT_W);
788 }
789 
790 static FrontendOptions::InputKind
791 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
792   using namespace cc1options;
793   Opts.ProgramAction = frontend::ParseSyntaxOnly;
794   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
795     switch (A->getOption().getID()) {
796     default:
797       assert(0 && "Invalid option in group!");
798     case OPT_ast_dump:
799       Opts.ProgramAction = frontend::ASTDump; break;
800     case OPT_ast_print:
801       Opts.ProgramAction = frontend::ASTPrint; break;
802     case OPT_ast_print_xml:
803       Opts.ProgramAction = frontend::ASTPrintXML; break;
804     case OPT_ast_view:
805       Opts.ProgramAction = frontend::ASTView; break;
806     case OPT_dump_raw_tokens:
807       Opts.ProgramAction = frontend::DumpRawTokens; break;
808     case OPT_dump_record_layouts:
809       Opts.ProgramAction = frontend::DumpRecordLayouts; break;
810     case OPT_dump_tokens:
811       Opts.ProgramAction = frontend::DumpTokens; break;
812     case OPT_S:
813       Opts.ProgramAction = frontend::EmitAssembly; break;
814     case OPT_emit_llvm_bc:
815       Opts.ProgramAction = frontend::EmitBC; break;
816     case OPT_emit_html:
817       Opts.ProgramAction = frontend::EmitHTML; break;
818     case OPT_emit_llvm:
819       Opts.ProgramAction = frontend::EmitLLVM; break;
820     case OPT_emit_llvm_only:
821       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
822     case OPT_fixit:
823       Opts.ProgramAction = frontend::FixIt; break;
824     case OPT_emit_pch:
825       Opts.ProgramAction = frontend::GeneratePCH; break;
826     case OPT_emit_pth:
827       Opts.ProgramAction = frontend::GeneratePTH; break;
828     case OPT_parse_noop:
829       Opts.ProgramAction = frontend::ParseNoop; break;
830     case OPT_parse_print_callbacks:
831       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
832     case OPT_fsyntax_only:
833       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
834     case OPT_print_decl_contexts:
835       Opts.ProgramAction = frontend::PrintDeclContext; break;
836     case OPT_E:
837       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
838     case OPT_rewrite_blocks:
839       Opts.ProgramAction = frontend::RewriteBlocks; break;
840     case OPT_rewrite_macros:
841       Opts.ProgramAction = frontend::RewriteMacros; break;
842     case OPT_rewrite_objc:
843       Opts.ProgramAction = frontend::RewriteObjC; break;
844     case OPT_rewrite_test:
845       Opts.ProgramAction = frontend::RewriteTest; break;
846     case OPT_analyze:
847       Opts.ProgramAction = frontend::RunAnalysis; break;
848     case OPT_Eonly:
849       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
850     }
851   }
852   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
853     Opts.ProgramAction = frontend::PluginAction;
854     Opts.ActionName = A->getValue(Args);
855   }
856 
857   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
858     Opts.CodeCompletionAt =
859       ParsedSourceLocation::FromString(A->getValue(Args));
860     if (Opts.CodeCompletionAt.FileName.empty())
861       Diags.Report(diag::err_drv_invalid_value)
862         << A->getAsString(Args) << A->getValue(Args);
863   }
864   Opts.DebugCodeCompletionPrinter =
865     !Args.hasArg(OPT_no_code_completion_debug_printer);
866   Opts.DisableFree = Args.hasArg(OPT_disable_free);
867   Opts.EmptyInputOnly = Args.hasArg(OPT_empty_input_only);
868 
869   Opts.FixItLocations.clear();
870   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
871          ie = Args.filtered_end(); it != ie; ++it) {
872     const char *Loc = it->getValue(Args);
873     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
874 
875     if (PSL.FileName.empty()) {
876       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
877       continue;
878     }
879 
880     Opts.FixItLocations.push_back(PSL);
881   }
882 
883   Opts.OutputFile = getLastArgValue(Args, OPT_o);
884   Opts.Plugins = getAllArgValues(Args, OPT_load);
885   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
886   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
887   Opts.ShowStats = Args.hasArg(OPT_print_stats);
888   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
889   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
890 
891   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
892   if (const Arg *A = Args.getLastArg(OPT_x)) {
893     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
894       .Case("c", FrontendOptions::IK_C)
895       .Case("cl", FrontendOptions::IK_OpenCL)
896       .Case("c", FrontendOptions::IK_C)
897       .Case("cl", FrontendOptions::IK_OpenCL)
898       .Case("c++", FrontendOptions::IK_CXX)
899       .Case("objective-c", FrontendOptions::IK_ObjC)
900       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
901       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
902       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
903       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
904       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
905       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
906       .Case("c-header", FrontendOptions::IK_C)
907       .Case("objective-c-header", FrontendOptions::IK_ObjC)
908       .Case("c++-header", FrontendOptions::IK_CXX)
909       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
910       .Case("ast", FrontendOptions::IK_AST)
911       .Default(FrontendOptions::IK_None);
912     if (DashX == FrontendOptions::IK_None)
913       Diags.Report(diag::err_drv_invalid_value)
914         << A->getAsString(Args) << A->getValue(Args);
915   }
916 
917   // '-' is the default input if none is given.
918   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
919   Opts.Inputs.clear();
920   if (Inputs.empty())
921     Inputs.push_back("-");
922   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
923     FrontendOptions::InputKind IK = DashX;
924     if (IK == FrontendOptions::IK_None) {
925       IK = FrontendOptions::getInputKindForExtension(
926         llvm::StringRef(Inputs[i]).rsplit('.').second);
927       // FIXME: Remove this hack.
928       if (i == 0)
929         DashX = IK;
930     }
931     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
932   }
933 
934   return DashX;
935 }
936 
937 static std::string GetBuiltinIncludePath(const char *Argv0,
938                                          void *MainAddr) {
939   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
940 
941   if (!P.isEmpty()) {
942     P.eraseComponent();  // Remove /clang from foo/bin/clang
943     P.eraseComponent();  // Remove /bin   from foo/bin
944 
945     // Get foo/lib/clang/<version>/include
946     P.appendComponent("lib");
947     P.appendComponent("clang");
948     P.appendComponent(CLANG_VERSION_STRING);
949     P.appendComponent("include");
950   }
951 
952   return P.str();
953 }
954 
955 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
956                                   const char *Argv0, void *MainAddr) {
957   using namespace cc1options;
958   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
959   Opts.Verbose = Args.hasArg(OPT_v);
960   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
961   Opts.BuiltinIncludePath = "";
962   // FIXME: Add an option for this, its a slow call.
963   if (!Args.hasArg(OPT_nobuiltininc))
964     Opts.BuiltinIncludePath = GetBuiltinIncludePath(Argv0, MainAddr);
965 
966   // Add -I... and -F... options in order.
967   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
968          ie = Args.filtered_end(); it != ie; ++it)
969     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
970                  /*IsFramework=*/ it->getOption().matches(OPT_F));
971 
972   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
973   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
974   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
975                                              OPT_iwithprefixbefore),
976          ie = Args.filtered_end(); it != ie; ++it) {
977     if (it->getOption().matches(OPT_iprefix))
978       Prefix = it->getValue(Args);
979     else if (it->getOption().matches(OPT_iwithprefix))
980       Opts.AddPath(Prefix.str() + it->getValue(Args),
981                    frontend::System, false, false);
982     else
983       Opts.AddPath(Prefix.str() + it->getValue(Args),
984                    frontend::Angled, false, false);
985   }
986 
987   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
988          ie = Args.filtered_end(); it != ie; ++it)
989     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
990   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
991          ie = Args.filtered_end(); it != ie; ++it)
992     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
993   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
994          ie = Args.filtered_end(); it != ie; ++it)
995     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
996 
997   // FIXME: Need options for the various environment variables!
998 }
999 
1000 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1001                           FrontendOptions::InputKind IK,
1002                           Diagnostic &Diags) {
1003   // FIXME: Cleanup per-file based stuff.
1004 
1005   // Set some properties which depend soley on the input kind; it would be nice
1006   // to move these to the language standard, and have the driver resolve the
1007   // input kind + language standard.
1008   if (IK == FrontendOptions::IK_Asm) {
1009     Opts.AsmPreprocessor = 1;
1010   } else if (IK == FrontendOptions::IK_ObjC ||
1011              IK == FrontendOptions::IK_ObjCXX ||
1012              IK == FrontendOptions::IK_PreprocessedObjC ||
1013              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1014     Opts.ObjC1 = Opts.ObjC2 = 1;
1015   }
1016 
1017   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1018   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1019     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1020 #define LANGSTANDARD(id, name, desc, features) \
1021       .Case(name, LangStandard::lang_##id)
1022 #include "clang/Frontend/LangStandards.def"
1023       .Default(LangStandard::lang_unspecified);
1024     if (LangStd == LangStandard::lang_unspecified)
1025       Diags.Report(diag::err_drv_invalid_value)
1026         << A->getAsString(Args) << A->getValue(Args);
1027   }
1028 
1029   if (LangStd == LangStandard::lang_unspecified) {
1030     // Based on the base language, pick one.
1031     switch (IK) {
1032     case FrontendOptions::IK_None:
1033     case FrontendOptions::IK_AST:
1034       assert(0 && "Invalid input kind!");
1035     case FrontendOptions::IK_OpenCL:
1036       LangStd = LangStandard::lang_opencl;
1037       break;
1038     case FrontendOptions::IK_Asm:
1039     case FrontendOptions::IK_C:
1040     case FrontendOptions::IK_PreprocessedC:
1041     case FrontendOptions::IK_ObjC:
1042     case FrontendOptions::IK_PreprocessedObjC:
1043       LangStd = LangStandard::lang_gnu99;
1044       break;
1045     case FrontendOptions::IK_CXX:
1046     case FrontendOptions::IK_PreprocessedCXX:
1047     case FrontendOptions::IK_ObjCXX:
1048     case FrontendOptions::IK_PreprocessedObjCXX:
1049       LangStd = LangStandard::lang_gnucxx98;
1050       break;
1051     }
1052   }
1053 
1054   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1055   Opts.BCPLComment = Std.hasBCPLComments();
1056   Opts.C99 = Std.isC99();
1057   Opts.CPlusPlus = Std.isCPlusPlus();
1058   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1059   Opts.Digraphs = Std.hasDigraphs();
1060   Opts.GNUMode = Std.isGNUMode();
1061   Opts.GNUInline = !Std.isC99();
1062   Opts.HexFloats = Std.hasHexFloats();
1063   Opts.ImplicitInt = Std.hasImplicitInt();
1064 
1065   // OpenCL has some additional defaults.
1066   if (LangStd == LangStandard::lang_opencl) {
1067     Opts.OpenCL = 1;
1068     Opts.AltiVec = 1;
1069     Opts.CXXOperatorNames = 1;
1070     Opts.LaxVectorConversions = 1;
1071   }
1072 
1073   // OpenCL and C++ both have bool, true, false keywords.
1074   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1075 
1076   if (Opts.CPlusPlus)
1077     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1078 
1079   if (Args.hasArg(OPT_fobjc_gc_only))
1080     Opts.setGCMode(LangOptions::GCOnly);
1081   else if (Args.hasArg(OPT_fobjc_gc))
1082     Opts.setGCMode(LangOptions::HybridGC);
1083 
1084   if (Args.hasArg(OPT_print_ivar_layout))
1085     Opts.ObjCGCBitmapPrint = 1;
1086 
1087   if (Args.hasArg(OPT_faltivec))
1088     Opts.AltiVec = 1;
1089 
1090   if (Args.hasArg(OPT_pthread))
1091     Opts.POSIXThreads = 1;
1092 
1093   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1094                                         "default");
1095   if (Vis == "default")
1096     Opts.setVisibilityMode(LangOptions::Default);
1097   else if (Vis == "hidden")
1098     Opts.setVisibilityMode(LangOptions::Hidden);
1099   else if (Vis == "protected")
1100     Opts.setVisibilityMode(LangOptions::Protected);
1101   else
1102     Diags.Report(diag::err_drv_invalid_value)
1103       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1104 
1105   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1106 
1107   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1108   // is specified, or -std is set to a conforming mode.
1109   Opts.Trigraphs = !Opts.GNUMode;
1110   if (Args.hasArg(OPT_trigraphs))
1111     Opts.Trigraphs = 1;
1112 
1113   Opts.DollarIdents = !Opts.AsmPreprocessor;
1114   if (Args.hasArg(OPT_fdollars_in_identifiers))
1115     Opts.DollarIdents = 1;
1116 
1117   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1118   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1119   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1120   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1121       Opts.LaxVectorConversions = 0;
1122   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1123   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1124   Opts.Blocks = Args.hasArg(OPT_fblocks);
1125   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1126   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1127   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1128   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1129   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1130   Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1131   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1132   Opts.MathErrno = !Args.hasArg(OPT_fno_math_errno);
1133   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1134                                                Diags);
1135   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1136   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1137                                                  OPT_fconstant_string_class);
1138   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1139   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1140   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1141   Opts.Static = Args.hasArg(OPT_static_define);
1142   Opts.OptimizeSize = 0;
1143 
1144   // FIXME: Eliminate this dependency.
1145   unsigned Opt =
1146     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1147   Opts.Optimize = Opt != 0;
1148 
1149   // This is the __NO_INLINE__ define, which just depends on things like the
1150   // optimization level and -fno-inline, not actually whether the backend has
1151   // inlining enabled.
1152   //
1153   // FIXME: This is affected by other options (-fno-inline).
1154   Opts.NoInline = !Opt;
1155 
1156   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1157   switch (SSP) {
1158   default:
1159     Diags.Report(diag::err_drv_invalid_value)
1160       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1161     break;
1162   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1163   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1164   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1165   }
1166 }
1167 
1168 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args) {
1169   using namespace cc1options;
1170   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1171   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1172   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1173       Opts.TokenCache = A->getValue(Args);
1174   else
1175     Opts.TokenCache = Opts.ImplicitPTHInclude;
1176   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1177 
1178   // Add macros from the command line.
1179   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1180          ie = Args.filtered_end(); it != ie; ++it) {
1181     if (it->getOption().matches(OPT_D))
1182       Opts.addMacroDef(it->getValue(Args));
1183     else
1184       Opts.addMacroUndef(it->getValue(Args));
1185   }
1186 
1187   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1188 
1189   // Add the ordered list of -includes.
1190   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1191                                              OPT_include_pth),
1192          ie = Args.filtered_end(); it != ie; ++it) {
1193     // PCH is handled specially, we need to extra the original include path.
1194     if (it->getOption().matches(OPT_include_pch)) {
1195       std::string OriginalFile =
1196         PCHReader::getOriginalSourceFile(it->getValue(Args));
1197 
1198       // FIXME: Don't fail like this.
1199       if (OriginalFile.empty())
1200         exit(1);
1201 
1202       Opts.Includes.push_back(OriginalFile);
1203     } else
1204       Opts.Includes.push_back(it->getValue(Args));
1205   }
1206 }
1207 
1208 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1209                                         ArgList &Args) {
1210   using namespace cc1options;
1211   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1212   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1213   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1214   Opts.ShowComments = Args.hasArg(OPT_C);
1215   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1216 }
1217 
1218 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1219   using namespace cc1options;
1220   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1221   Opts.CPU = getLastArgValue(Args, OPT_mcpu);
1222   Opts.Triple = getLastArgValue(Args, OPT_triple);
1223   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1224 
1225   // Use the host triple if unspecified.
1226   if (Opts.Triple.empty())
1227     Opts.Triple = llvm::sys::getHostTriple();
1228 }
1229 
1230 //
1231 
1232 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1233                                         const char **ArgBegin,
1234                                         const char **ArgEnd,
1235                                         const char *Argv0,
1236                                         void *MainAddr,
1237                                         Diagnostic &Diags) {
1238   // Parse the arguments.
1239   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1240   unsigned MissingArgIndex, MissingArgCount;
1241   llvm::OwningPtr<InputArgList> Args(
1242     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1243 
1244   // Check for missing argument error.
1245   if (MissingArgCount)
1246     Diags.Report(diag::err_drv_missing_argument)
1247       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1248 
1249   // Issue errors on unknown arguments.
1250   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1251          ie = Args->filtered_end(); it != ie; ++it)
1252     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1253 
1254   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1255   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1256   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1257   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1258   FrontendOptions::InputKind DashX =
1259     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1260   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args,
1261                         Argv0, MainAddr);
1262   if (DashX != FrontendOptions::IK_AST)
1263     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1264   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args);
1265   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1266   ParseTargetArgs(Res.getTargetOpts(), *Args);
1267 }
1268