xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision ac0605e927c487a79954ce6ae716aefc8ff098f4) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/PCHReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // VerifyModule is only derived.
149   // Inlining is only derived.
150 
151   if (Opts.AsmVerbose)
152     Res.push_back("-masm-verbose");
153   if (!Opts.CodeModel.empty()) {
154     Res.push_back("-mcode-model");
155     Res.push_back(Opts.CodeModel);
156   }
157   if (!Opts.DebugPass.empty()) {
158     Res.push_back("-mdebug-pass");
159     Res.push_back(Opts.DebugPass);
160   }
161   if (Opts.DisableFPElim)
162     Res.push_back("-mdisable-fp-elim");
163   if (!Opts.FloatABI.empty()) {
164     Res.push_back("-mfloat-abi");
165     Res.push_back(Opts.FloatABI);
166   }
167   if (!Opts.LimitFloatPrecision.empty()) {
168     Res.push_back("-mlimit-float-precision");
169     Res.push_back(Opts.LimitFloatPrecision);
170   }
171   if (Opts.NoZeroInitializedInBSS)
172     Res.push_back("-mno-zero-initialized-bss");
173   if (Opts.SoftFloat)
174     Res.push_back("-msoft-float");
175   if (Opts.UnwindTables)
176     Res.push_back("-munwind-tables");
177   if (Opts.RelocationModel != "pic") {
178     Res.push_back("-mrelocation-model");
179     Res.push_back(Opts.RelocationModel);
180   }
181 }
182 
183 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
184                                        std::vector<std::string> &Res) {
185   if (Opts.IncludeSystemHeaders)
186     Res.push_back("-sys-header-deps");
187   if (Opts.UsePhonyTargets)
188     Res.push_back("-MP");
189   if (!Opts.OutputFile.empty()) {
190     Res.push_back("-dependency-file");
191     Res.push_back(Opts.OutputFile);
192   }
193   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
194     Res.push_back("-MT");
195     Res.push_back(Opts.Targets[i]);
196   }
197 }
198 
199 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
200                                  std::vector<std::string> &Res) {
201   if (Opts.IgnoreWarnings)
202     Res.push_back("-w");
203   if (Opts.NoRewriteMacros)
204     Res.push_back("-Wno-rewrite-macros");
205   if (Opts.Pedantic)
206     Res.push_back("-pedantic");
207   if (Opts.PedanticErrors)
208     Res.push_back("-pedantic-errors");
209   if (!Opts.ShowColumn)
210     Res.push_back("-fno-show-column");
211   if (!Opts.ShowLocation)
212     Res.push_back("-fno-show-source-location");
213   if (!Opts.ShowCarets)
214     Res.push_back("-fno-caret-diagnostics");
215   if (!Opts.ShowFixits)
216     Res.push_back("-fno-diagnostics-fixit-info");
217   if (Opts.ShowSourceRanges)
218     Res.push_back("-fdiagnostics-print-source-range-info");
219   if (Opts.ShowColors)
220     Res.push_back("-fcolor-diagnostics");
221   if (Opts.VerifyDiagnostics)
222     Res.push_back("-verify");
223   if (Opts.BinaryOutput)
224     Res.push_back("-fdiagnostics-binary");
225   if (Opts.ShowOptionNames)
226     Res.push_back("-fdiagnostics-show-option");
227   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
228     Res.push_back("-ftabstop");
229     Res.push_back(llvm::utostr(Opts.TabStop));
230   }
231   if (Opts.MessageLength) {
232     Res.push_back("-fmessage-length");
233     Res.push_back(llvm::utostr(Opts.MessageLength));
234   }
235   if (!Opts.DumpBuildInformation.empty()) {
236     Res.push_back("-dump-build-information");
237     Res.push_back(Opts.DumpBuildInformation);
238   }
239   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
240     Res.push_back("-W" + Opts.Warnings[i]);
241 }
242 
243 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
244   switch (Kind) {
245   case FrontendOptions::IK_None:              break;
246   case FrontendOptions::IK_AST:               return "ast";
247   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
248   case FrontendOptions::IK_C:                 return "c";
249   case FrontendOptions::IK_CXX:               return "c++";
250   case FrontendOptions::IK_ObjC:              return "objective-c";
251   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
252   case FrontendOptions::IK_OpenCL:            return "cl";
253   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
254   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
255   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
256   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
257   }
258 
259   llvm_unreachable("Unexpected language kind!");
260   return 0;
261 }
262 
263 static const char *getActionName(frontend::ActionKind Kind) {
264   switch (Kind) {
265   case frontend::PluginAction:
266   case frontend::InheritanceView:
267     llvm_unreachable("Invalid kind!");
268 
269   case frontend::ASTDump:                return "-ast-dump";
270   case frontend::ASTPrint:               return "-ast-print";
271   case frontend::ASTPrintXML:            return "-ast-print-xml";
272   case frontend::ASTView:                return "-ast-view";
273   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
274   case frontend::DumpRecordLayouts:      return "-dump-record-layouts";
275   case frontend::DumpTokens:             return "-dump-tokens";
276   case frontend::EmitAssembly:           return "-S";
277   case frontend::EmitBC:                 return "-emit-llvm-bc";
278   case frontend::EmitHTML:               return "-emit-html";
279   case frontend::EmitLLVM:               return "-emit-llvm";
280   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
281   case frontend::FixIt:                  return "-fixit";
282   case frontend::GeneratePCH:            return "-emit-pch";
283   case frontend::GeneratePTH:            return "-emit-pth";
284   case frontend::ParseNoop:              return "-parse-noop";
285   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
286   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
287   case frontend::PrintDeclContext:       return "-print-decl-contexts";
288   case frontend::PrintPreprocessedInput: return "-E";
289   case frontend::RewriteMacros:          return "-rewrite-macros";
290   case frontend::RewriteObjC:            return "-rewrite-objc";
291   case frontend::RewriteTest:            return "-rewrite-test";
292   case frontend::RunAnalysis:            return "-analyze";
293   case frontend::RunPreprocessorOnly:    return "-Eonly";
294   }
295 
296   llvm_unreachable("Unexpected language kind!");
297   return 0;
298 }
299 
300 static void FrontendOptsToArgs(const FrontendOptions &Opts,
301                                std::vector<std::string> &Res) {
302   if (!Opts.DebugCodeCompletionPrinter)
303     Res.push_back("-no-code-completion-debug-printer");
304   if (Opts.DisableFree)
305     Res.push_back("-disable-free");
306   if (Opts.EmptyInputOnly)
307     Res.push_back("-empty-input-only");
308   if (Opts.RelocatablePCH)
309     Res.push_back("-relocatable-pch");
310   if (Opts.ShowHelp)
311     Res.push_back("-help");
312   if (Opts.ShowMacrosInCodeCompletion)
313     Res.push_back("-code-completion-macros");
314   if (Opts.ShowStats)
315     Res.push_back("-print-stats");
316   if (Opts.ShowTimers)
317     Res.push_back("-ftime-report");
318   if (Opts.ShowVersion)
319     Res.push_back("-version");
320 
321   bool NeedLang = false;
322   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
323     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
324         Opts.Inputs[i].first)
325       NeedLang = true;
326   if (NeedLang) {
327     Res.push_back("-x");
328     Res.push_back(getInputKindName(Opts.Inputs[0].first));
329   }
330   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
331     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
332            "Unable to represent this input vector!");
333     Res.push_back(Opts.Inputs[i].second);
334   }
335 
336   if (!Opts.OutputFile.empty()) {
337     Res.push_back("-o");
338     Res.push_back(Opts.OutputFile);
339   }
340   if (!Opts.ViewClassInheritance.empty()) {
341     Res.push_back("-cxx-inheritance-view");
342     Res.push_back(Opts.ViewClassInheritance);
343   }
344   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
345     Res.push_back("-fixit-at");
346     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
347                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
348                   llvm::utostr(Opts.FixItLocations[i].Column));
349   }
350   if (!Opts.CodeCompletionAt.FileName.empty()) {
351     Res.push_back("-code-completion-at");
352     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
353                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
354                   llvm::utostr(Opts.CodeCompletionAt.Column));
355   }
356   if (Opts.ProgramAction != frontend::InheritanceView &&
357       Opts.ProgramAction != frontend::PluginAction)
358     Res.push_back(getActionName(Opts.ProgramAction));
359   if (!Opts.ActionName.empty()) {
360     Res.push_back("-plugin");
361     Res.push_back(Opts.ActionName);
362   }
363   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
364     Res.push_back("-load");
365     Res.push_back(Opts.Plugins[i]);
366   }
367 }
368 
369 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
370                                    std::vector<std::string> &Res) {
371   if (Opts.Sysroot != "/") {
372     Res.push_back("-isysroot");
373     Res.push_back(Opts.Sysroot);
374   }
375 
376   /// User specified include entries.
377   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
378     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
379     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
380       llvm::llvm_report_error("Invalid option set!");
381     if (E.IsUserSupplied) {
382       if (E.Group == frontend::After) {
383         Res.push_back("-idirafter");
384       } else if (E.Group == frontend::Quoted) {
385         Res.push_back("-iquote");
386       } else if (E.Group == frontend::System) {
387         Res.push_back("-isystem");
388       } else {
389         assert(E.Group == frontend::Angled && "Invalid group!");
390         Res.push_back(E.IsFramework ? "-F" : "-I");
391       }
392     } else {
393       if (E.Group != frontend::Angled && E.Group != frontend::System)
394         llvm::llvm_report_error("Invalid option set!");
395       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
396                     "-iwithprefix");
397     }
398     Res.push_back(E.Path);
399   }
400 
401   if (!Opts.EnvIncPath.empty()) {
402     // FIXME: Provide an option for this, and move env detection to driver.
403     llvm::llvm_report_error("Not yet implemented!");
404   }
405   if (!Opts.CEnvIncPath.empty()) {
406     // FIXME: Provide an option for this, and move env detection to driver.
407     llvm::llvm_report_error("Not yet implemented!");
408   }
409   if (!Opts.ObjCEnvIncPath.empty()) {
410     // FIXME: Provide an option for this, and move env detection to driver.
411     llvm::llvm_report_error("Not yet implemented!");
412   }
413   if (!Opts.CXXEnvIncPath.empty()) {
414     // FIXME: Provide an option for this, and move env detection to driver.
415     llvm::llvm_report_error("Not yet implemented!");
416   }
417   if (!Opts.ObjCXXEnvIncPath.empty()) {
418     // FIXME: Provide an option for this, and move env detection to driver.
419     llvm::llvm_report_error("Not yet implemented!");
420   }
421   if (!Opts.ResourceDir.empty()) {
422     Res.push_back("-resource-dir");
423     Res.push_back(Opts.ResourceDir);
424   }
425   if (!Opts.UseStandardIncludes)
426     Res.push_back("-nostdinc");
427   if (Opts.Verbose)
428     Res.push_back("-v");
429 }
430 
431 static void LangOptsToArgs(const LangOptions &Opts,
432                            std::vector<std::string> &Res) {
433   LangOptions DefaultLangOpts;
434 
435   // FIXME: Need to set -std to get all the implicit options.
436 
437   // FIXME: We want to only pass options relative to the defaults, which
438   // requires constructing a target. :(
439   //
440   // It would be better to push the all target specific choices into the driver,
441   // so that everything below that was more uniform.
442 
443   if (Opts.Trigraphs)
444     Res.push_back("-trigraphs");
445   // Implicit based on the input kind:
446   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
447   // Implicit based on the input language standard:
448   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
449   if (Opts.DollarIdents)
450     Res.push_back("-fdollars-in-identifiers");
451   if (Opts.Microsoft)
452     Res.push_back("-fms-extensions");
453   if (Opts.ObjCNonFragileABI)
454     Res.push_back("-fobjc-nonfragile-abi");
455   // NoInline is implicit.
456   if (!Opts.CXXOperatorNames)
457     Res.push_back("-fno-operator-names");
458   if (Opts.PascalStrings)
459     Res.push_back("-fpascal-strings");
460   if (Opts.CatchUndefined)
461     Res.push_back("-fcatch-undefined-behavior");
462   if (Opts.WritableStrings)
463     Res.push_back("-fwritable-strings");
464   if (!Opts.LaxVectorConversions)
465     Res.push_back("-fno-lax-vector-conversions");
466   if (Opts.AltiVec)
467     Res.push_back("-faltivec");
468   if (Opts.Exceptions)
469     Res.push_back("-fexceptions");
470   if (!Opts.RTTI)
471     Res.push_back("-fno-rtti");
472   if (!Opts.NeXTRuntime)
473     Res.push_back("-fgnu-runtime");
474   if (Opts.Freestanding)
475     Res.push_back("-ffreestanding");
476   if (Opts.NoBuiltin)
477     Res.push_back("-fno-builtin");
478   if (!Opts.AssumeSaneOperatorNew)
479     Res.push_back("-fno-assume-sane-operator-new");
480   if (Opts.ThreadsafeStatics)
481     llvm::llvm_report_error("FIXME: Not yet implemented!");
482   if (Opts.POSIXThreads)
483     Res.push_back("-pthread");
484   if (Opts.Blocks)
485     Res.push_back("-fblocks");
486   if (Opts.EmitAllDecls)
487     Res.push_back("-femit-all-decls");
488   if (Opts.MathErrno)
489     Res.push_back("-fmath-errno");
490   if (Opts.OverflowChecking)
491     Res.push_back("-ftrapv");
492   if (Opts.HeinousExtensions)
493     Res.push_back("-fheinous-gnu-extensions");
494   // Optimize is implicit.
495   // OptimizeSize is implicit.
496   if (Opts.Static)
497     Res.push_back("-static-define");
498   if (Opts.PICLevel) {
499     Res.push_back("-pic-level");
500     Res.push_back(llvm::utostr(Opts.PICLevel));
501   }
502   if (Opts.ObjCGCBitmapPrint)
503     Res.push_back("-print-ivar-layout");
504   // FIXME: Don't forget to update when the default changes!
505   if (Opts.AccessControl)
506     Res.push_back("-faccess-control");
507   if (!Opts.CharIsSigned)
508     Res.push_back("-fno-signed-char");
509   if (Opts.ShortWChar)
510     Res.push_back("-fshort-wchar");
511   if (!Opts.ElideConstructors)
512     Res.push_back("-fno-elide-constructors");
513   if (Opts.getGCMode() != LangOptions::NonGC) {
514     if (Opts.getGCMode() == LangOptions::HybridGC) {
515       Res.push_back("-fobjc-gc");
516     } else {
517       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
518       Res.push_back("-fobjc-gc-only");
519     }
520   }
521   if (Opts.getVisibilityMode() != LangOptions::Default) {
522     Res.push_back("-fvisibility");
523     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
524       Res.push_back("hidden");
525     } else {
526       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
527              "Invalid visibility!");
528       Res.push_back("protected");
529     }
530   }
531   if (Opts.getStackProtectorMode() != 0) {
532     Res.push_back("-stack-protector");
533     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
534   }
535   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
536     Res.push_back("-ftemplate-depth");
537     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
538   }
539   if (!Opts.ObjCConstantStringClass.empty()) {
540     Res.push_back("-fconstant-string-class");
541     Res.push_back(Opts.ObjCConstantStringClass);
542   }
543 }
544 
545 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
546                                    std::vector<std::string> &Res) {
547   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
548     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
549                   Opts.Macros[i].first);
550   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
551     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
552     Res.push_back("-include");
553     Res.push_back(Opts.Includes[i]);
554   }
555   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
556     Res.push_back("-imacros");
557     Res.push_back(Opts.MacroIncludes[i]);
558   }
559   if (!Opts.UsePredefines)
560     Res.push_back("-undef");
561   if (!Opts.ImplicitPCHInclude.empty()) {
562     Res.push_back("-include-pch");
563     Res.push_back(Opts.ImplicitPCHInclude);
564   }
565   if (!Opts.ImplicitPTHInclude.empty()) {
566     Res.push_back("-include-pth");
567     Res.push_back(Opts.ImplicitPTHInclude);
568   }
569   if (!Opts.TokenCache.empty()) {
570     if (Opts.ImplicitPTHInclude.empty()) {
571       Res.push_back("-token-cache");
572       Res.push_back(Opts.TokenCache);
573     } else
574       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
575              "Unsupported option combination!");
576   }
577   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
578     Res.push_back("-remap-file");
579     Res.push_back(Opts.RemappedFiles[i].first + ";" +
580                   Opts.RemappedFiles[i].second);
581   }
582 }
583 
584 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
585                                          std::vector<std::string> &Res) {
586   if (!Opts.ShowCPP && !Opts.ShowMacros)
587     llvm::llvm_report_error("Invalid option combination!");
588 
589   if (Opts.ShowCPP && Opts.ShowMacros)
590     Res.push_back("-dD");
591   else if (!Opts.ShowCPP && Opts.ShowMacros)
592     Res.push_back("-dM");
593 
594   if (!Opts.ShowLineMarkers)
595     Res.push_back("-P");
596   if (Opts.ShowComments)
597     Res.push_back("-C");
598   if (Opts.ShowMacroComments)
599     Res.push_back("-CC");
600 }
601 
602 static void TargetOptsToArgs(const TargetOptions &Opts,
603                              std::vector<std::string> &Res) {
604   Res.push_back("-triple");
605   Res.push_back(Opts.Triple);
606   if (!Opts.CPU.empty()) {
607     Res.push_back("-target-cpu");
608     Res.push_back(Opts.CPU);
609   }
610   if (!Opts.ABI.empty()) {
611     Res.push_back("-target-abi");
612     Res.push_back(Opts.ABI);
613   }
614   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
615     Res.push_back("-target-feature");
616     Res.push_back(Opts.Features[i]);
617   }
618 }
619 
620 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
621   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
622   CodeGenOptsToArgs(getCodeGenOpts(), Res);
623   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
624   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
625   FrontendOptsToArgs(getFrontendOpts(), Res);
626   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
627   LangOptsToArgs(getLangOpts(), Res);
628   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
629   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
630   TargetOptsToArgs(getTargetOpts(), Res);
631 }
632 
633 //===----------------------------------------------------------------------===//
634 // Deserialization (to args)
635 //===----------------------------------------------------------------------===//
636 
637 using namespace clang::driver;
638 using namespace clang::driver::cc1options;
639 
640 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
641                                        llvm::StringRef Default = "") {
642   if (Arg *A = Args.getLastArg(ID))
643     return A->getValue(Args);
644   return Default;
645 }
646 
647 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
648                               int Default, Diagnostic &Diags) {
649   Arg *A = Args.getLastArg(ID);
650   if (!A)
651     return Default;
652 
653   int Res = Default;
654   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
655     Diags.Report(diag::err_drv_invalid_int_value)
656         << A->getAsString(Args) << A->getValue(Args);
657 
658   return Res;
659 }
660 
661 static std::vector<std::string>
662 getAllArgValues(ArgList &Args, cc1options::ID ID) {
663   llvm::SmallVector<const char *, 16> Values;
664   Args.AddAllArgValues(Values, ID);
665   return std::vector<std::string>(Values.begin(), Values.end());
666 }
667 
668 //
669 
670 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
671                               Diagnostic &Diags) {
672   using namespace cc1options;
673 
674   Opts.AnalysisList.clear();
675 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
676   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
677 #include "clang/Frontend/Analyses.def"
678 
679   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
680     llvm::StringRef Name = A->getValue(Args);
681     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
682 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
683       .Case(CMDFLAG, NAME##Model)
684 #include "clang/Frontend/Analyses.def"
685       .Default(NumStores);
686     // FIXME: Error handling.
687     if (Value == NumStores)
688       Diags.Report(diag::err_drv_invalid_value)
689         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
690     else
691       Opts.AnalysisStoreOpt = Value;
692   }
693 
694   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
695     llvm::StringRef Name = A->getValue(Args);
696     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
697 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
698       .Case(CMDFLAG, NAME##Model)
699 #include "clang/Frontend/Analyses.def"
700       .Default(NumConstraints);
701     // FIXME: Error handling.
702     if (Value == NumConstraints)
703       Diags.Report(diag::err_drv_invalid_value)
704         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
705     else
706       Opts.AnalysisConstraintsOpt = Value;
707   }
708 
709   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
710     llvm::StringRef Name = A->getValue(Args);
711     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
712 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
713       .Case(CMDFLAG, PD_##NAME)
714 #include "clang/Frontend/Analyses.def"
715       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
716     // FIXME: Error handling.
717     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
718       Diags.Report(diag::err_drv_invalid_value)
719         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
720     else
721       Opts.AnalysisDiagOpt = Value;
722   }
723 
724   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
725   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
726   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
727   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
728   Opts.AnalyzeNestedBlocks =
729     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
730   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
731   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
732   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
733   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
734   Opts.EnableExperimentalInternalChecks =
735     Args.hasArg(OPT_analyzer_experimental_internal_checks);
736   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
737 }
738 
739 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
740                              Diagnostic &Diags) {
741   using namespace cc1options;
742   // -Os implies -O2
743   if (Args.hasArg(OPT_Os))
744     Opts.OptimizationLevel = 2;
745   else {
746     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
747     if (Opts.OptimizationLevel > 3) {
748       Diags.Report(diag::err_drv_invalid_value)
749         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
750       Opts.OptimizationLevel = 3;
751     }
752   }
753 
754   // We must always run at least the always inlining pass.
755   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
756     : CodeGenOptions::OnlyAlwaysInlining;
757 
758   Opts.DebugInfo = Args.hasArg(OPT_g);
759   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
760   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
761   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
762   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
763   Opts.NoCommon = Args.hasArg(OPT_fno_common);
764   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
765   Opts.OptimizeSize = Args.hasArg(OPT_Os);
766   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
767 
768   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
769   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
770   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
771   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
772   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
773   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
774   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
775   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
776   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
777   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
778 
779   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
780 
781   // FIXME: Put elsewhere?
782 #ifdef NDEBUG
783   Opts.VerifyModule = 0;
784 #else
785   Opts.VerifyModule = 1;
786 #endif
787 }
788 
789 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
790                                       ArgList &Args) {
791   using namespace cc1options;
792   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
793   Opts.Targets = getAllArgValues(Args, OPT_MT);
794   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
795   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
796 }
797 
798 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
799                                 Diagnostic &Diags) {
800   using namespace cc1options;
801   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
802   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
803   Opts.Pedantic = Args.hasArg(OPT_pedantic);
804   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
805   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
806   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
807   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
808   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
809   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
810   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
811   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
812   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
813   Opts.BinaryOutput = Args.hasArg(OPT_fdiagnostics_binary);
814   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
815                                     DiagnosticOptions::DefaultTabStop, Diags);
816   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
817     Diags.Report(diag::warn_ignoring_ftabstop_value)
818       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
819     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
820   }
821   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
822   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
823   Opts.Warnings = getAllArgValues(Args, OPT_W);
824 }
825 
826 static FrontendOptions::InputKind
827 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
828   using namespace cc1options;
829   Opts.ProgramAction = frontend::ParseSyntaxOnly;
830   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
831     switch (A->getOption().getID()) {
832     default:
833       assert(0 && "Invalid option in group!");
834     case OPT_ast_dump:
835       Opts.ProgramAction = frontend::ASTDump; break;
836     case OPT_ast_print:
837       Opts.ProgramAction = frontend::ASTPrint; break;
838     case OPT_ast_print_xml:
839       Opts.ProgramAction = frontend::ASTPrintXML; break;
840     case OPT_ast_view:
841       Opts.ProgramAction = frontend::ASTView; break;
842     case OPT_dump_raw_tokens:
843       Opts.ProgramAction = frontend::DumpRawTokens; break;
844     case OPT_dump_record_layouts:
845       Opts.ProgramAction = frontend::DumpRecordLayouts; break;
846     case OPT_dump_tokens:
847       Opts.ProgramAction = frontend::DumpTokens; break;
848     case OPT_S:
849       Opts.ProgramAction = frontend::EmitAssembly; break;
850     case OPT_emit_llvm_bc:
851       Opts.ProgramAction = frontend::EmitBC; break;
852     case OPT_emit_html:
853       Opts.ProgramAction = frontend::EmitHTML; break;
854     case OPT_emit_llvm:
855       Opts.ProgramAction = frontend::EmitLLVM; break;
856     case OPT_emit_llvm_only:
857       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
858     case OPT_fixit:
859       Opts.ProgramAction = frontend::FixIt; break;
860     case OPT_emit_pch:
861       Opts.ProgramAction = frontend::GeneratePCH; break;
862     case OPT_emit_pth:
863       Opts.ProgramAction = frontend::GeneratePTH; break;
864     case OPT_parse_noop:
865       Opts.ProgramAction = frontend::ParseNoop; break;
866     case OPT_parse_print_callbacks:
867       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
868     case OPT_fsyntax_only:
869       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
870     case OPT_print_decl_contexts:
871       Opts.ProgramAction = frontend::PrintDeclContext; break;
872     case OPT_E:
873       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
874     case OPT_rewrite_macros:
875       Opts.ProgramAction = frontend::RewriteMacros; break;
876     case OPT_rewrite_objc:
877       Opts.ProgramAction = frontend::RewriteObjC; break;
878     case OPT_rewrite_test:
879       Opts.ProgramAction = frontend::RewriteTest; break;
880     case OPT_analyze:
881       Opts.ProgramAction = frontend::RunAnalysis; break;
882     case OPT_Eonly:
883       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
884     }
885   }
886   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
887     Opts.ProgramAction = frontend::PluginAction;
888     Opts.ActionName = A->getValue(Args);
889   }
890 
891   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
892     Opts.CodeCompletionAt =
893       ParsedSourceLocation::FromString(A->getValue(Args));
894     if (Opts.CodeCompletionAt.FileName.empty())
895       Diags.Report(diag::err_drv_invalid_value)
896         << A->getAsString(Args) << A->getValue(Args);
897   }
898   Opts.DebugCodeCompletionPrinter =
899     !Args.hasArg(OPT_no_code_completion_debug_printer);
900   Opts.DisableFree = Args.hasArg(OPT_disable_free);
901   Opts.EmptyInputOnly = Args.hasArg(OPT_empty_input_only);
902 
903   Opts.FixItLocations.clear();
904   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
905          ie = Args.filtered_end(); it != ie; ++it) {
906     const char *Loc = it->getValue(Args);
907     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
908 
909     if (PSL.FileName.empty()) {
910       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
911       continue;
912     }
913 
914     Opts.FixItLocations.push_back(PSL);
915   }
916 
917   Opts.OutputFile = getLastArgValue(Args, OPT_o);
918   Opts.Plugins = getAllArgValues(Args, OPT_load);
919   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
920   Opts.ShowHelp = Args.hasArg(OPT_help);
921   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
922   Opts.ShowStats = Args.hasArg(OPT_print_stats);
923   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
924   Opts.ShowVersion = Args.hasArg(OPT_version);
925   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
926 
927   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
928   if (const Arg *A = Args.getLastArg(OPT_x)) {
929     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
930       .Case("c", FrontendOptions::IK_C)
931       .Case("cl", FrontendOptions::IK_OpenCL)
932       .Case("c", FrontendOptions::IK_C)
933       .Case("cl", FrontendOptions::IK_OpenCL)
934       .Case("c++", FrontendOptions::IK_CXX)
935       .Case("objective-c", FrontendOptions::IK_ObjC)
936       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
937       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
938       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
939       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
940       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
941       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
942       .Case("c-header", FrontendOptions::IK_C)
943       .Case("objective-c-header", FrontendOptions::IK_ObjC)
944       .Case("c++-header", FrontendOptions::IK_CXX)
945       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
946       .Case("ast", FrontendOptions::IK_AST)
947       .Default(FrontendOptions::IK_None);
948     if (DashX == FrontendOptions::IK_None)
949       Diags.Report(diag::err_drv_invalid_value)
950         << A->getAsString(Args) << A->getValue(Args);
951   }
952 
953   // '-' is the default input if none is given.
954   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
955   Opts.Inputs.clear();
956   if (Inputs.empty())
957     Inputs.push_back("-");
958   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
959     FrontendOptions::InputKind IK = DashX;
960     if (IK == FrontendOptions::IK_None) {
961       IK = FrontendOptions::getInputKindForExtension(
962         llvm::StringRef(Inputs[i]).rsplit('.').second);
963       // FIXME: Remove this hack.
964       if (i == 0)
965         DashX = IK;
966     }
967     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
968   }
969 
970   return DashX;
971 }
972 
973 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
974                                                  void *MainAddr) {
975   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
976 
977   if (!P.isEmpty()) {
978     P.eraseComponent();  // Remove /clang from foo/bin/clang
979     P.eraseComponent();  // Remove /bin   from foo/bin
980 
981     // Get foo/lib/clang/<version>/include
982     P.appendComponent("lib");
983     P.appendComponent("clang");
984     P.appendComponent(CLANG_VERSION_STRING);
985   }
986 
987   return P.str();
988 }
989 
990 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
991   using namespace cc1options;
992   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
993   Opts.Verbose = Args.hasArg(OPT_v);
994   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
995   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
996   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
997 
998   // Add -I... and -F... options in order.
999   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1000          ie = Args.filtered_end(); it != ie; ++it)
1001     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
1002                  /*IsFramework=*/ it->getOption().matches(OPT_F));
1003 
1004   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1005   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1006   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1007                                              OPT_iwithprefixbefore),
1008          ie = Args.filtered_end(); it != ie; ++it) {
1009     if (it->getOption().matches(OPT_iprefix))
1010       Prefix = it->getValue(Args);
1011     else if (it->getOption().matches(OPT_iwithprefix))
1012       Opts.AddPath(Prefix.str() + it->getValue(Args),
1013                    frontend::System, false, false);
1014     else
1015       Opts.AddPath(Prefix.str() + it->getValue(Args),
1016                    frontend::Angled, false, false);
1017   }
1018 
1019   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1020          ie = Args.filtered_end(); it != ie; ++it)
1021     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1022   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1023          ie = Args.filtered_end(); it != ie; ++it)
1024     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1025   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1026          ie = Args.filtered_end(); it != ie; ++it)
1027     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1028 
1029   // FIXME: Need options for the various environment variables!
1030 }
1031 
1032 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1033                           FrontendOptions::InputKind IK,
1034                           Diagnostic &Diags) {
1035   // FIXME: Cleanup per-file based stuff.
1036 
1037   // Set some properties which depend soley on the input kind; it would be nice
1038   // to move these to the language standard, and have the driver resolve the
1039   // input kind + language standard.
1040   if (IK == FrontendOptions::IK_Asm) {
1041     Opts.AsmPreprocessor = 1;
1042   } else if (IK == FrontendOptions::IK_ObjC ||
1043              IK == FrontendOptions::IK_ObjCXX ||
1044              IK == FrontendOptions::IK_PreprocessedObjC ||
1045              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1046     Opts.ObjC1 = Opts.ObjC2 = 1;
1047   }
1048 
1049   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1050   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1051     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1052 #define LANGSTANDARD(id, name, desc, features) \
1053       .Case(name, LangStandard::lang_##id)
1054 #include "clang/Frontend/LangStandards.def"
1055       .Default(LangStandard::lang_unspecified);
1056     if (LangStd == LangStandard::lang_unspecified)
1057       Diags.Report(diag::err_drv_invalid_value)
1058         << A->getAsString(Args) << A->getValue(Args);
1059   }
1060 
1061   if (LangStd == LangStandard::lang_unspecified) {
1062     // Based on the base language, pick one.
1063     switch (IK) {
1064     case FrontendOptions::IK_None:
1065     case FrontendOptions::IK_AST:
1066       assert(0 && "Invalid input kind!");
1067     case FrontendOptions::IK_OpenCL:
1068       LangStd = LangStandard::lang_opencl;
1069       break;
1070     case FrontendOptions::IK_Asm:
1071     case FrontendOptions::IK_C:
1072     case FrontendOptions::IK_PreprocessedC:
1073     case FrontendOptions::IK_ObjC:
1074     case FrontendOptions::IK_PreprocessedObjC:
1075       LangStd = LangStandard::lang_gnu99;
1076       break;
1077     case FrontendOptions::IK_CXX:
1078     case FrontendOptions::IK_PreprocessedCXX:
1079     case FrontendOptions::IK_ObjCXX:
1080     case FrontendOptions::IK_PreprocessedObjCXX:
1081       LangStd = LangStandard::lang_gnucxx98;
1082       break;
1083     }
1084   }
1085 
1086   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1087   Opts.BCPLComment = Std.hasBCPLComments();
1088   Opts.C99 = Std.isC99();
1089   Opts.CPlusPlus = Std.isCPlusPlus();
1090   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1091   Opts.Digraphs = Std.hasDigraphs();
1092   Opts.GNUMode = Std.isGNUMode();
1093   Opts.GNUInline = !Std.isC99();
1094   Opts.HexFloats = Std.hasHexFloats();
1095   Opts.ImplicitInt = Std.hasImplicitInt();
1096 
1097   // OpenCL has some additional defaults.
1098   if (LangStd == LangStandard::lang_opencl) {
1099     Opts.OpenCL = 1;
1100     Opts.AltiVec = 1;
1101     Opts.CXXOperatorNames = 1;
1102     Opts.LaxVectorConversions = 1;
1103   }
1104 
1105   // OpenCL and C++ both have bool, true, false keywords.
1106   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1107 
1108   if (Opts.CPlusPlus)
1109     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1110 
1111   if (Args.hasArg(OPT_fobjc_gc_only))
1112     Opts.setGCMode(LangOptions::GCOnly);
1113   else if (Args.hasArg(OPT_fobjc_gc))
1114     Opts.setGCMode(LangOptions::HybridGC);
1115 
1116   if (Args.hasArg(OPT_print_ivar_layout))
1117     Opts.ObjCGCBitmapPrint = 1;
1118 
1119   if (Args.hasArg(OPT_faltivec))
1120     Opts.AltiVec = 1;
1121 
1122   if (Args.hasArg(OPT_pthread))
1123     Opts.POSIXThreads = 1;
1124 
1125   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1126                                         "default");
1127   if (Vis == "default")
1128     Opts.setVisibilityMode(LangOptions::Default);
1129   else if (Vis == "hidden")
1130     Opts.setVisibilityMode(LangOptions::Hidden);
1131   else if (Vis == "protected")
1132     Opts.setVisibilityMode(LangOptions::Protected);
1133   else
1134     Diags.Report(diag::err_drv_invalid_value)
1135       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1136 
1137   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1138 
1139   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1140   // is specified, or -std is set to a conforming mode.
1141   Opts.Trigraphs = !Opts.GNUMode;
1142   if (Args.hasArg(OPT_trigraphs))
1143     Opts.Trigraphs = 1;
1144 
1145   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1146                                    OPT_fno_dollars_in_identifiers,
1147                                    !Opts.AsmPreprocessor);
1148   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1149   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1150   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1151   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1152       Opts.LaxVectorConversions = 0;
1153   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1154   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1155   Opts.Blocks = Args.hasArg(OPT_fblocks);
1156   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1157   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1158   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1159   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1160   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1161   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1162   Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1163   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1164   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1165   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1166                                                Diags);
1167   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1168   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1169                                                  OPT_fconstant_string_class);
1170   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1171   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1172   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1173   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1174   Opts.Static = Args.hasArg(OPT_static_define);
1175   Opts.OptimizeSize = 0;
1176 
1177   // FIXME: Eliminate this dependency.
1178   unsigned Opt =
1179     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1180   Opts.Optimize = Opt != 0;
1181 
1182   // This is the __NO_INLINE__ define, which just depends on things like the
1183   // optimization level and -fno-inline, not actually whether the backend has
1184   // inlining enabled.
1185   //
1186   // FIXME: This is affected by other options (-fno-inline).
1187   Opts.NoInline = !Opt;
1188 
1189   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1190   switch (SSP) {
1191   default:
1192     Diags.Report(diag::err_drv_invalid_value)
1193       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1194     break;
1195   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1196   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1197   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1198   }
1199 }
1200 
1201 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1202                                   Diagnostic &Diags) {
1203   using namespace cc1options;
1204   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1205   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1206   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1207       Opts.TokenCache = A->getValue(Args);
1208   else
1209     Opts.TokenCache = Opts.ImplicitPTHInclude;
1210   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1211 
1212   // Add macros from the command line.
1213   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1214          ie = Args.filtered_end(); it != ie; ++it) {
1215     if (it->getOption().matches(OPT_D))
1216       Opts.addMacroDef(it->getValue(Args));
1217     else
1218       Opts.addMacroUndef(it->getValue(Args));
1219   }
1220 
1221   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1222 
1223   // Add the ordered list of -includes.
1224   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1225                                              OPT_include_pth),
1226          ie = Args.filtered_end(); it != ie; ++it) {
1227     // PCH is handled specially, we need to extra the original include path.
1228     if (it->getOption().matches(OPT_include_pch)) {
1229       std::string OriginalFile =
1230         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1231       if (OriginalFile.empty())
1232         continue;
1233 
1234       Opts.Includes.push_back(OriginalFile);
1235     } else
1236       Opts.Includes.push_back(it->getValue(Args));
1237   }
1238 
1239   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1240          ie = Args.filtered_end(); it != ie; ++it) {
1241     std::pair<llvm::StringRef,llvm::StringRef> Split =
1242       llvm::StringRef(it->getValue(Args)).split(';');
1243 
1244     if (Split.second.empty()) {
1245       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1246       continue;
1247     }
1248 
1249     Opts.addRemappedFile(Split.first, Split.second);
1250   }
1251 }
1252 
1253 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1254                                         ArgList &Args) {
1255   using namespace cc1options;
1256   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1257   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1258   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1259   Opts.ShowComments = Args.hasArg(OPT_C);
1260   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1261 }
1262 
1263 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1264   using namespace cc1options;
1265   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1266   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1267   Opts.Triple = getLastArgValue(Args, OPT_triple);
1268   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1269 
1270   // Use the host triple if unspecified.
1271   if (Opts.Triple.empty())
1272     Opts.Triple = llvm::sys::getHostTriple();
1273 }
1274 
1275 //
1276 
1277 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1278                                         const char **ArgBegin,
1279                                         const char **ArgEnd,
1280                                         Diagnostic &Diags) {
1281   // Parse the arguments.
1282   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1283   unsigned MissingArgIndex, MissingArgCount;
1284   llvm::OwningPtr<InputArgList> Args(
1285     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1286 
1287   // Check for missing argument error.
1288   if (MissingArgCount)
1289     Diags.Report(diag::err_drv_missing_argument)
1290       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1291 
1292   // Issue errors on unknown arguments.
1293   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1294          ie = Args->filtered_end(); it != ie; ++it)
1295     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1296 
1297   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1298   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1299   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1300   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1301   FrontendOptions::InputKind DashX =
1302     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1303   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1304   if (DashX != FrontendOptions::IK_AST)
1305     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1306   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1307   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1308   ParseTargetArgs(Res.getTargetOpts(), *Args);
1309 }
1310