xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision c7ffd35cb720fcbf701af58ceba720eb3de0b3d6) 
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/Basic/FileManager.h"
14 #include "clang/Driver/Arg.h"
15 #include "clang/Driver/ArgList.h"
16 #include "clang/Driver/CC1Options.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/OptTable.h"
19 #include "clang/Driver/Option.h"
20 #include "clang/Frontend/CompilerInvocation.h"
21 #include "clang/Frontend/LangStandard.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/StringSwitch.h"
27 #include "llvm/ADT/Triple.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/Host.h"
30 #include "llvm/Support/Path.h"
31 using namespace clang;
32 
33 static const char *getAnalysisName(Analyses Kind) {
34   switch (Kind) {
35   default:
36     llvm_unreachable("Unknown analysis kind!");
37 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
38   case NAME: return "-" CMDFLAG;
39 #include "clang/Frontend/Analyses.def"
40   }
41 }
42 
43 static const char *getAnalysisStoreName(AnalysisStores Kind) {
44   switch (Kind) {
45   default:
46     llvm_unreachable("Unknown analysis store!");
47 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
48   case NAME##Model: return CMDFLAG;
49 #include "clang/Frontend/Analyses.def"
50   }
51 }
52 
53 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
54   switch (Kind) {
55   default:
56     llvm_unreachable("Unknown analysis constraints!");
57 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
58   case NAME##Model: return CMDFLAG;
59 #include "clang/Frontend/Analyses.def"
60   }
61 }
62 
63 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
64   switch (Kind) {
65   default:
66     llvm_unreachable("Unknown analysis client!");
67 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
68   case PD_##NAME: return CMDFLAG;
69 #include "clang/Frontend/Analyses.def"
70   }
71 }
72 
73 //===----------------------------------------------------------------------===//
74 // Serialization (to args)
75 //===----------------------------------------------------------------------===//
76 
77 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
78                                std::vector<std::string> &Res) {
79   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
80     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
81   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
82     Res.push_back("-analyzer-store");
83     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
84   }
85   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
86     Res.push_back("-analyzer-constraints");
87     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
88   }
89   if (Opts.AnalysisDiagOpt != PD_HTML) {
90     Res.push_back("-analyzer-output");
91     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
92   }
93   if (!Opts.AnalyzeSpecificFunction.empty()) {
94     Res.push_back("-analyze-function");
95     Res.push_back(Opts.AnalyzeSpecificFunction);
96   }
97   if (Opts.AnalyzeAll)
98     Res.push_back("-analyzer-opt-analyze-headers");
99   if (Opts.AnalyzerDisplayProgress)
100     Res.push_back("-analyzer-display-progress");
101   if (Opts.AnalyzeNestedBlocks)
102     Res.push_back("-analyzer-opt-analyze-nested-blocks");
103   if (Opts.AnalyzerStats)
104     Res.push_back("-analyzer-stats");
105   if (Opts.EagerlyAssume)
106     Res.push_back("-analyzer-eagerly-assume");
107   if (!Opts.PurgeDead)
108     Res.push_back("-analyzer-no-purge-dead");
109   if (Opts.TrimGraph)
110     Res.push_back("-trim-egraph");
111   if (Opts.VisualizeEGDot)
112     Res.push_back("-analyzer-viz-egraph-graphviz");
113   if (Opts.VisualizeEGDot)
114     Res.push_back("-analyzer-viz-egraph-ubigraph");
115   if (Opts.EnableExperimentalChecks)
116     Res.push_back("-analyzer-experimental-checks");
117   if (Opts.EnableExperimentalInternalChecks)
118     Res.push_back("-analyzer-experimental-internal-checks");
119   if (Opts.IdempotentOps)
120     Res.push_back("-analyzer-check-idempotent-operations");
121   if (Opts.ObjCSelfInitCheck)
122     Res.push_back("-analyzer-check-objc-self-init");
123   if (Opts.BufferOverflows)
124     Res.push_back("-analyzer-check-buffer-overflows");
125 }
126 
127 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
128                               std::vector<std::string> &Res) {
129   if (Opts.DebugInfo)
130     Res.push_back("-g");
131   if (Opts.DisableLLVMOpts)
132     Res.push_back("-disable-llvm-optzns");
133   if (Opts.DisableRedZone)
134     Res.push_back("-disable-red-zone");
135   if (!Opts.DwarfDebugFlags.empty()) {
136     Res.push_back("-dwarf-debug-flags");
137     Res.push_back(Opts.DwarfDebugFlags);
138   }
139   if (!Opts.MergeAllConstants)
140     Res.push_back("-fno-merge-all-constants");
141   if (Opts.NoCommon)
142     Res.push_back("-fno-common");
143   if (Opts.NoImplicitFloat)
144     Res.push_back("-no-implicit-float");
145   if (Opts.OmitLeafFramePointer)
146     Res.push_back("-momit-leaf-frame-pointer");
147   if (Opts.OptimizeSize) {
148     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
149     Res.push_back("-Os");
150   } else if (Opts.OptimizationLevel != 0)
151     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
152   if (!Opts.MainFileName.empty()) {
153     Res.push_back("-main-file-name");
154     Res.push_back(Opts.MainFileName);
155   }
156   // SimplifyLibCalls is only derived.
157   // TimePasses is only derived.
158   // UnitAtATime is unused.
159   // Inlining is only derived.
160 
161   // UnrollLoops is derived, but also accepts an option, no
162   // harm in pushing it back here.
163   if (Opts.UnrollLoops)
164     Res.push_back("-funroll-loops");
165   if (Opts.DataSections)
166     Res.push_back("-fdata-sections");
167   if (Opts.FunctionSections)
168     Res.push_back("-ffunction-sections");
169   if (Opts.AsmVerbose)
170     Res.push_back("-masm-verbose");
171   if (!Opts.CodeModel.empty()) {
172     Res.push_back("-mcode-model");
173     Res.push_back(Opts.CodeModel);
174   }
175   if (!Opts.CXAAtExit)
176     Res.push_back("-fno-use-cxa-atexit");
177   if (Opts.CXXCtorDtorAliases)
178     Res.push_back("-mconstructor-aliases");
179   if (!Opts.DebugPass.empty()) {
180     Res.push_back("-mdebug-pass");
181     Res.push_back(Opts.DebugPass);
182   }
183   if (Opts.DisableFPElim)
184     Res.push_back("-mdisable-fp-elim");
185   if (!Opts.FloatABI.empty()) {
186     Res.push_back("-mfloat-abi");
187     Res.push_back(Opts.FloatABI);
188   }
189   if (!Opts.LimitFloatPrecision.empty()) {
190     Res.push_back("-mlimit-float-precision");
191     Res.push_back(Opts.LimitFloatPrecision);
192   }
193   if (Opts.NoZeroInitializedInBSS)
194     Res.push_back("-mno-zero-initialized-bss");
195   switch (Opts.getObjCDispatchMethod()) {
196   case CodeGenOptions::Legacy:
197     break;
198   case CodeGenOptions::Mixed:
199     Res.push_back("-fobjc-dispatch-method=mixed");
200     break;
201   case CodeGenOptions::NonLegacy:
202     Res.push_back("-fobjc-dispatch-method=non-legacy");
203     break;
204   }
205   if (Opts.RelaxAll)
206     Res.push_back("-mrelax-all");
207   if (Opts.SoftFloat)
208     Res.push_back("-msoft-float");
209   if (Opts.UnwindTables)
210     Res.push_back("-munwind-tables");
211   if (Opts.RelocationModel != "pic") {
212     Res.push_back("-mrelocation-model");
213     Res.push_back(Opts.RelocationModel);
214   }
215   if (!Opts.VerifyModule)
216     Res.push_back("-disable-llvm-verifier");
217 }
218 
219 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
220                                        std::vector<std::string> &Res) {
221   if (Opts.IncludeSystemHeaders)
222     Res.push_back("-sys-header-deps");
223   if (Opts.UsePhonyTargets)
224     Res.push_back("-MP");
225   if (!Opts.OutputFile.empty()) {
226     Res.push_back("-dependency-file");
227     Res.push_back(Opts.OutputFile);
228   }
229   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
230     Res.push_back("-MT");
231     Res.push_back(Opts.Targets[i]);
232   }
233 }
234 
235 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
236                                  std::vector<std::string> &Res) {
237   if (Opts.IgnoreWarnings)
238     Res.push_back("-w");
239   if (Opts.NoRewriteMacros)
240     Res.push_back("-Wno-rewrite-macros");
241   if (Opts.Pedantic)
242     Res.push_back("-pedantic");
243   if (Opts.PedanticErrors)
244     Res.push_back("-pedantic-errors");
245   if (!Opts.ShowColumn)
246     Res.push_back("-fno-show-column");
247   if (!Opts.ShowLocation)
248     Res.push_back("-fno-show-source-location");
249   if (!Opts.ShowCarets)
250     Res.push_back("-fno-caret-diagnostics");
251   if (!Opts.ShowFixits)
252     Res.push_back("-fno-diagnostics-fixit-info");
253   if (Opts.ShowSourceRanges)
254     Res.push_back("-fdiagnostics-print-source-range-info");
255   if (Opts.ShowParseableFixits)
256     Res.push_back("-fdiagnostics-parseable-fixits");
257   if (Opts.ShowColors)
258     Res.push_back("-fcolor-diagnostics");
259   if (Opts.VerifyDiagnostics)
260     Res.push_back("-verify");
261   if (Opts.ShowOptionNames)
262     Res.push_back("-fdiagnostics-show-option");
263   if (Opts.ShowCategories == 1)
264     Res.push_back("-fdiagnostics-show-category=id");
265   else if (Opts.ShowCategories == 2)
266     Res.push_back("-fdiagnostics-show-category=name");
267   if (Opts.ErrorLimit) {
268     Res.push_back("-ferror-limit");
269     Res.push_back(llvm::utostr(Opts.ErrorLimit));
270   }
271   if (Opts.MacroBacktraceLimit
272                         != DiagnosticOptions::DefaultMacroBacktraceLimit) {
273     Res.push_back("-fmacro-backtrace-limit");
274     Res.push_back(llvm::utostr(Opts.MacroBacktraceLimit));
275   }
276   if (Opts.TemplateBacktraceLimit
277                         != DiagnosticOptions::DefaultTemplateBacktraceLimit) {
278     Res.push_back("-ftemplate-backtrace-limit");
279     Res.push_back(llvm::utostr(Opts.TemplateBacktraceLimit));
280   }
281 
282   if (Opts.TabStop != DiagnosticOptions::DefaultTabStop) {
283     Res.push_back("-ftabstop");
284     Res.push_back(llvm::utostr(Opts.TabStop));
285   }
286   if (Opts.MessageLength) {
287     Res.push_back("-fmessage-length");
288     Res.push_back(llvm::utostr(Opts.MessageLength));
289   }
290   if (!Opts.DumpBuildInformation.empty()) {
291     Res.push_back("-dump-build-information");
292     Res.push_back(Opts.DumpBuildInformation);
293   }
294   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
295     Res.push_back("-W" + Opts.Warnings[i]);
296 }
297 
298 static const char *getInputKindName(InputKind Kind) {
299   switch (Kind) {
300   case IK_None:              break;
301   case IK_AST:               return "ast";
302   case IK_Asm:               return "assembler-with-cpp";
303   case IK_C:                 return "c";
304   case IK_CXX:               return "c++";
305   case IK_LLVM_IR:           return "ir";
306   case IK_ObjC:              return "objective-c";
307   case IK_ObjCXX:            return "objective-c++";
308   case IK_OpenCL:            return "cl";
309   case IK_CUDA:              return "cuda";
310   case IK_PreprocessedC:     return "cpp-output";
311   case IK_PreprocessedCXX:   return "c++-cpp-output";
312   case IK_PreprocessedObjC:  return "objective-c-cpp-output";
313   case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
314   }
315 
316   llvm_unreachable("Unexpected language kind!");
317   return 0;
318 }
319 
320 static const char *getActionName(frontend::ActionKind Kind) {
321   switch (Kind) {
322   case frontend::PluginAction:
323   case frontend::InheritanceView:
324     llvm_unreachable("Invalid kind!");
325 
326   case frontend::ASTDump:                return "-ast-dump";
327   case frontend::ASTDumpXML:             return "-ast-dump-xml";
328   case frontend::ASTPrint:               return "-ast-print";
329   case frontend::ASTPrintXML:            return "-ast-print-xml";
330   case frontend::ASTView:                return "-ast-view";
331   case frontend::BoostCon:               return "-boostcon";
332   case frontend::CreateModule:           return "-create-module";
333   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
334   case frontend::DumpTokens:             return "-dump-tokens";
335   case frontend::EmitAssembly:           return "-S";
336   case frontend::EmitBC:                 return "-emit-llvm-bc";
337   case frontend::EmitHTML:               return "-emit-html";
338   case frontend::EmitLLVM:               return "-emit-llvm";
339   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
340   case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
341   case frontend::EmitObj:                return "-emit-obj";
342   case frontend::FixIt:                  return "-fixit";
343   case frontend::GeneratePCH:            return "-emit-pch";
344   case frontend::GeneratePTH:            return "-emit-pth";
345   case frontend::InitOnly:               return "-init-only";
346   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
347   case frontend::PrintDeclContext:       return "-print-decl-contexts";
348   case frontend::PrintPreamble:          return "-print-preamble";
349   case frontend::PrintPreprocessedInput: return "-E";
350   case frontend::RewriteMacros:          return "-rewrite-macros";
351   case frontend::RewriteObjC:            return "-rewrite-objc";
352   case frontend::RewriteTest:            return "-rewrite-test";
353   case frontend::RunAnalysis:            return "-analyze";
354   case frontend::RunPreprocessorOnly:    return "-Eonly";
355   }
356 
357   llvm_unreachable("Unexpected language kind!");
358   return 0;
359 }
360 
361 static void FileSystemOptsToArgs(const FileSystemOptions &Opts,
362                                  std::vector<std::string> &Res) {
363   if (!Opts.WorkingDir.empty()) {
364     Res.push_back("-working-directory");
365     Res.push_back(Opts.WorkingDir);
366   }
367 }
368 
369 static void FrontendOptsToArgs(const FrontendOptions &Opts,
370                                std::vector<std::string> &Res) {
371   if (Opts.DisableFree)
372     Res.push_back("-disable-free");
373   if (Opts.RelocatablePCH)
374     Res.push_back("-relocatable-pch");
375   if (Opts.ChainedPCH)
376     Res.push_back("-chained-pch");
377   if (Opts.ShowHelp)
378     Res.push_back("-help");
379   if (Opts.ShowMacrosInCodeCompletion)
380     Res.push_back("-code-completion-macros");
381   if (Opts.ShowCodePatternsInCodeCompletion)
382     Res.push_back("-code-completion-patterns");
383   if (!Opts.ShowGlobalSymbolsInCodeCompletion)
384     Res.push_back("-no-code-completion-globals");
385   if (Opts.ShowStats)
386     Res.push_back("-print-stats");
387   if (Opts.ShowTimers)
388     Res.push_back("-ftime-report");
389   if (Opts.ShowVersion)
390     Res.push_back("-version");
391   if (Opts.FixWhatYouCan)
392     Res.push_back("-fix-what-you-can");
393 
394   bool NeedLang = false;
395   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
396     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
397         Opts.Inputs[i].first)
398       NeedLang = true;
399   if (NeedLang) {
400     Res.push_back("-x");
401     Res.push_back(getInputKindName(Opts.Inputs[0].first));
402   }
403   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
404     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
405            "Unable to represent this input vector!");
406     Res.push_back(Opts.Inputs[i].second);
407   }
408 
409   if (!Opts.OutputFile.empty()) {
410     Res.push_back("-o");
411     Res.push_back(Opts.OutputFile);
412   }
413   if (!Opts.ViewClassInheritance.empty()) {
414     Res.push_back("-cxx-inheritance-view");
415     Res.push_back(Opts.ViewClassInheritance);
416   }
417   if (!Opts.CodeCompletionAt.FileName.empty()) {
418     Res.push_back("-code-completion-at");
419     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
420                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
421                   llvm::utostr(Opts.CodeCompletionAt.Column));
422   }
423   if (Opts.ProgramAction != frontend::InheritanceView &&
424       Opts.ProgramAction != frontend::PluginAction)
425     Res.push_back(getActionName(Opts.ProgramAction));
426   if (!Opts.ActionName.empty()) {
427     Res.push_back("-plugin");
428     Res.push_back(Opts.ActionName);
429     for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i) {
430       Res.push_back("-plugin-arg-" + Opts.ActionName);
431       Res.push_back(Opts.PluginArgs[i]);
432     }
433   }
434   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
435     Res.push_back("-load");
436     Res.push_back(Opts.Plugins[i]);
437   }
438   for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
439     Res.push_back("-add-plugin");
440     Res.push_back(Opts.AddPluginActions[i]);
441   }
442   for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i) {
443     Res.push_back("-ast-merge");
444     Res.push_back(Opts.ASTMergeFiles[i]);
445   }
446   for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
447     Res.push_back("-import-module");
448     Res.push_back(Opts.Modules[i]);
449   }
450   for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i) {
451     Res.push_back("-mllvm");
452     Res.push_back(Opts.LLVMArgs[i]);
453   }
454 }
455 
456 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
457                                    std::vector<std::string> &Res) {
458   if (Opts.Sysroot != "/") {
459     Res.push_back("-isysroot");
460     Res.push_back(Opts.Sysroot);
461   }
462 
463   for (unsigned i = 0, e = Opts.CXXSystemIncludes.size(); i != e; ++i) {
464     Res.push_back("-cxx-system-include");
465     Res.push_back(Opts.CXXSystemIncludes[i]);
466   }
467 
468   /// User specified include entries.
469   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
470     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
471     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
472       llvm::report_fatal_error("Invalid option set!");
473     if (E.IsUserSupplied) {
474       if (E.Group == frontend::After) {
475         Res.push_back("-idirafter");
476       } else if (E.Group == frontend::Quoted) {
477         Res.push_back("-iquote");
478       } else if (E.Group == frontend::System) {
479         Res.push_back("-isystem");
480       } else {
481         assert(E.Group == frontend::Angled && "Invalid group!");
482         Res.push_back(E.IsFramework ? "-F" : "-I");
483       }
484     } else {
485       if (E.Group != frontend::Angled && E.Group != frontend::System)
486         llvm::report_fatal_error("Invalid option set!");
487       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
488                     "-iwithprefix");
489     }
490     Res.push_back(E.Path);
491   }
492 
493   if (!Opts.EnvIncPath.empty()) {
494     // FIXME: Provide an option for this, and move env detection to driver.
495     llvm::report_fatal_error("Not yet implemented!");
496   }
497   if (!Opts.CEnvIncPath.empty()) {
498     // FIXME: Provide an option for this, and move env detection to driver.
499     llvm::report_fatal_error("Not yet implemented!");
500   }
501   if (!Opts.ObjCEnvIncPath.empty()) {
502     // FIXME: Provide an option for this, and move env detection to driver.
503     llvm::report_fatal_error("Not yet implemented!");
504   }
505   if (!Opts.CXXEnvIncPath.empty()) {
506     // FIXME: Provide an option for this, and move env detection to driver.
507     llvm::report_fatal_error("Not yet implemented!");
508   }
509   if (!Opts.ObjCXXEnvIncPath.empty()) {
510     // FIXME: Provide an option for this, and move env detection to driver.
511     llvm::report_fatal_error("Not yet implemented!");
512   }
513   if (!Opts.ResourceDir.empty()) {
514     Res.push_back("-resource-dir");
515     Res.push_back(Opts.ResourceDir);
516   }
517   if (!Opts.UseStandardIncludes)
518     Res.push_back("-nostdinc");
519   if (!Opts.UseStandardCXXIncludes)
520     Res.push_back("-nostdinc++");
521   if (Opts.Verbose)
522     Res.push_back("-v");
523 }
524 
525 static void LangOptsToArgs(const LangOptions &Opts,
526                            std::vector<std::string> &Res) {
527   LangOptions DefaultLangOpts;
528 
529   // FIXME: Need to set -std to get all the implicit options.
530 
531   // FIXME: We want to only pass options relative to the defaults, which
532   // requires constructing a target. :(
533   //
534   // It would be better to push the all target specific choices into the driver,
535   // so that everything below that was more uniform.
536 
537   if (Opts.Trigraphs)
538     Res.push_back("-trigraphs");
539   // Implicit based on the input kind:
540   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
541   // Implicit based on the input language standard:
542   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
543   if (Opts.DollarIdents)
544     Res.push_back("-fdollars-in-identifiers");
545   if (Opts.GNUMode && !Opts.GNUKeywords)
546     Res.push_back("-fno-gnu-keywords");
547   if (!Opts.GNUMode && Opts.GNUKeywords)
548     Res.push_back("-fgnu-keywords");
549   if (Opts.Microsoft)
550     Res.push_back("-fms-extensions");
551   if (Opts.MSCVersion != 0)
552     Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
553   if (Opts.Borland)
554     Res.push_back("-fborland-extensions");
555   if (Opts.ObjCNonFragileABI)
556     Res.push_back("-fobjc-nonfragile-abi");
557   if (Opts.ObjCNonFragileABI2)
558     Res.push_back("-fobjc-nonfragile-abi");
559   if (Opts.ObjCDefaultSynthProperties)
560     Res.push_back("-fobjc-default-synthesize-properties");
561   // NoInline is implicit.
562   if (!Opts.CXXOperatorNames)
563     Res.push_back("-fno-operator-names");
564   if (Opts.PascalStrings)
565     Res.push_back("-fpascal-strings");
566   if (Opts.CatchUndefined)
567     Res.push_back("-fcatch-undefined-behavior");
568   if (Opts.WritableStrings)
569     Res.push_back("-fwritable-strings");
570   if (Opts.ConstStrings)
571     Res.push_back("-Wwrite-strings");
572   if (!Opts.LaxVectorConversions)
573     Res.push_back("-fno-lax-vector-conversions");
574   if (Opts.AltiVec)
575     Res.push_back("-faltivec");
576   if (Opts.Exceptions)
577     Res.push_back("-fexceptions");
578   if (Opts.SjLjExceptions)
579     Res.push_back("-fsjlj-exceptions");
580   if (!Opts.RTTI)
581     Res.push_back("-fno-rtti");
582   if (!Opts.NeXTRuntime)
583     Res.push_back("-fgnu-runtime");
584   if (Opts.Freestanding)
585     Res.push_back("-ffreestanding");
586   if (Opts.NoBuiltin)
587     Res.push_back("-fno-builtin");
588   if (!Opts.AssumeSaneOperatorNew)
589     Res.push_back("-fno-assume-sane-operator-new");
590   if (!Opts.ThreadsafeStatics)
591     Res.push_back("-fno-threadsafe-statics");
592   if (Opts.POSIXThreads)
593     Res.push_back("-pthread");
594   if (Opts.Blocks)
595     Res.push_back("-fblocks");
596   if (Opts.EmitAllDecls)
597     Res.push_back("-femit-all-decls");
598   if (Opts.MathErrno)
599     Res.push_back("-fmath-errno");
600   switch (Opts.getSignedOverflowBehavior()) {
601   case LangOptions::SOB_Undefined: break;
602   case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
603   case LangOptions::SOB_Trapping:
604     Res.push_back("-ftrapv"); break;
605     if (!Opts.OverflowHandler.empty()) {
606       Res.push_back("-ftrapv-handler");
607       Res.push_back(Opts.OverflowHandler);
608     }
609   }
610   if (Opts.HeinousExtensions)
611     Res.push_back("-fheinous-gnu-extensions");
612   // Optimize is implicit.
613   // OptimizeSize is implicit.
614   if (Opts.Static)
615     Res.push_back("-static-define");
616   if (Opts.DumpRecordLayouts)
617     Res.push_back("-fdump-record-layouts");
618   if (Opts.DumpVTableLayouts)
619     Res.push_back("-fdump-vtable-layouts");
620   if (Opts.NoBitFieldTypeAlign)
621     Res.push_back("-fno-bitfield-type-alignment");
622   if (Opts.SjLjExceptions)
623     Res.push_back("-fsjlj-exceptions");
624   if (Opts.PICLevel) {
625     Res.push_back("-pic-level");
626     Res.push_back(llvm::utostr(Opts.PICLevel));
627   }
628   if (Opts.ObjCGCBitmapPrint)
629     Res.push_back("-print-ivar-layout");
630   if (Opts.NoConstantCFStrings)
631     Res.push_back("-fno-constant-cfstrings");
632   if (!Opts.AccessControl)
633     Res.push_back("-fno-access-control");
634   if (!Opts.CharIsSigned)
635     Res.push_back("-fno-signed-char");
636   if (Opts.ShortWChar)
637     Res.push_back("-fshort-wchar");
638   if (!Opts.ElideConstructors)
639     Res.push_back("-fno-elide-constructors");
640   if (Opts.getGCMode() != LangOptions::NonGC) {
641     if (Opts.getGCMode() == LangOptions::HybridGC) {
642       Res.push_back("-fobjc-gc");
643     } else {
644       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
645       Res.push_back("-fobjc-gc-only");
646     }
647   }
648   if (Opts.AppleKext)
649     Res.push_back("-fapple-kext");
650 
651   if (Opts.getVisibilityMode() != DefaultVisibility) {
652     Res.push_back("-fvisibility");
653     if (Opts.getVisibilityMode() == HiddenVisibility) {
654       Res.push_back("hidden");
655     } else {
656       assert(Opts.getVisibilityMode() == ProtectedVisibility &&
657              "Invalid visibility!");
658       Res.push_back("protected");
659     }
660   }
661   if (Opts.InlineVisibilityHidden)
662     Res.push_back("-fvisibility-inlines-hidden");
663 
664   if (Opts.getStackProtectorMode() != 0) {
665     Res.push_back("-stack-protector");
666     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
667   }
668   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
669     Res.push_back("-ftemplate-depth");
670     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
671   }
672   if (!Opts.ObjCConstantStringClass.empty()) {
673     Res.push_back("-fconstant-string-class");
674     Res.push_back(Opts.ObjCConstantStringClass);
675   }
676 }
677 
678 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
679                                    std::vector<std::string> &Res) {
680   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
681     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
682                   Opts.Macros[i].first);
683   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
684     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
685     Res.push_back("-include");
686     Res.push_back(Opts.Includes[i]);
687   }
688   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
689     Res.push_back("-imacros");
690     Res.push_back(Opts.MacroIncludes[i]);
691   }
692   if (!Opts.UsePredefines)
693     Res.push_back("-undef");
694   if (Opts.DetailedRecord)
695     Res.push_back("-detailed-preprocessing-record");
696   if (!Opts.ImplicitPCHInclude.empty()) {
697     Res.push_back("-include-pch");
698     Res.push_back(Opts.ImplicitPCHInclude);
699   }
700   if (!Opts.ImplicitPTHInclude.empty()) {
701     Res.push_back("-include-pth");
702     Res.push_back(Opts.ImplicitPTHInclude);
703   }
704   if (!Opts.TokenCache.empty()) {
705     if (Opts.ImplicitPTHInclude.empty()) {
706       Res.push_back("-token-cache");
707       Res.push_back(Opts.TokenCache);
708     } else
709       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
710              "Unsupported option combination!");
711   }
712   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
713     Res.push_back("-remap-file");
714     Res.push_back(Opts.RemappedFiles[i].first + ";" +
715                   Opts.RemappedFiles[i].second);
716   }
717 }
718 
719 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
720                                          std::vector<std::string> &Res) {
721   if (!Opts.ShowCPP && !Opts.ShowMacros)
722     llvm::report_fatal_error("Invalid option combination!");
723 
724   if (Opts.ShowCPP && Opts.ShowMacros)
725     Res.push_back("-dD");
726   else if (!Opts.ShowCPP && Opts.ShowMacros)
727     Res.push_back("-dM");
728 
729   if (Opts.ShowHeaderIncludes)
730     Res.push_back("-H");
731   if (!Opts.ShowLineMarkers)
732     Res.push_back("-P");
733   if (Opts.ShowComments)
734     Res.push_back("-C");
735   if (Opts.ShowMacroComments)
736     Res.push_back("-CC");
737 }
738 
739 static void TargetOptsToArgs(const TargetOptions &Opts,
740                              std::vector<std::string> &Res) {
741   Res.push_back("-triple");
742   Res.push_back(Opts.Triple);
743   if (!Opts.CPU.empty()) {
744     Res.push_back("-target-cpu");
745     Res.push_back(Opts.CPU);
746   }
747   if (!Opts.ABI.empty()) {
748     Res.push_back("-target-abi");
749     Res.push_back(Opts.ABI);
750   }
751   if (!Opts.LinkerVersion.empty()) {
752     Res.push_back("-target-linker-version");
753     Res.push_back(Opts.LinkerVersion);
754   }
755   if (!Opts.CXXABI.empty()) {
756     Res.push_back("-cxx-abi");
757     Res.push_back(Opts.CXXABI);
758   }
759   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
760     Res.push_back("-target-feature");
761     Res.push_back(Opts.Features[i]);
762   }
763 }
764 
765 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
766   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
767   CodeGenOptsToArgs(getCodeGenOpts(), Res);
768   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
769   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
770   FileSystemOptsToArgs(getFileSystemOpts(), Res);
771   FrontendOptsToArgs(getFrontendOpts(), Res);
772   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
773   LangOptsToArgs(getLangOpts(), Res);
774   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
775   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
776   TargetOptsToArgs(getTargetOpts(), Res);
777 }
778 
779 //===----------------------------------------------------------------------===//
780 // Deserialization (to args)
781 //===----------------------------------------------------------------------===//
782 
783 using namespace clang::driver;
784 using namespace clang::driver::cc1options;
785 
786 //
787 
788 static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
789                                      Diagnostic &Diags) {
790   unsigned DefaultOpt = 0;
791   if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
792     DefaultOpt = 2;
793   // -Os implies -O2
794   return Args.hasArg(OPT_Os) ? 2 :
795     Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
796 }
797 
798 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
799                               Diagnostic &Diags) {
800   using namespace cc1options;
801 
802   Opts.AnalysisList.clear();
803 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
804   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
805 #include "clang/Frontend/Analyses.def"
806 
807   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
808     llvm::StringRef Name = A->getValue(Args);
809     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
810 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
811       .Case(CMDFLAG, NAME##Model)
812 #include "clang/Frontend/Analyses.def"
813       .Default(NumStores);
814     // FIXME: Error handling.
815     if (Value == NumStores)
816       Diags.Report(diag::err_drv_invalid_value)
817         << A->getAsString(Args) << Name;
818     else
819       Opts.AnalysisStoreOpt = Value;
820   }
821 
822   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
823     llvm::StringRef Name = A->getValue(Args);
824     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
825 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
826       .Case(CMDFLAG, NAME##Model)
827 #include "clang/Frontend/Analyses.def"
828       .Default(NumConstraints);
829     // FIXME: Error handling.
830     if (Value == NumConstraints)
831       Diags.Report(diag::err_drv_invalid_value)
832         << A->getAsString(Args) << Name;
833     else
834       Opts.AnalysisConstraintsOpt = Value;
835   }
836 
837   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
838     llvm::StringRef Name = A->getValue(Args);
839     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
840 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
841       .Case(CMDFLAG, PD_##NAME)
842 #include "clang/Frontend/Analyses.def"
843       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
844     // FIXME: Error handling.
845     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
846       Diags.Report(diag::err_drv_invalid_value)
847         << A->getAsString(Args) << Name;
848     else
849       Opts.AnalysisDiagOpt = Value;
850   }
851 
852   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
853   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
854   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
855   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
856   Opts.AnalyzeNestedBlocks =
857     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
858   Opts.AnalyzerStats = Args.hasArg(OPT_analysis_AnalyzerStats);
859   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
860   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
861   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
862   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
863   Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
864   Opts.CFGAddInitializers = Args.hasArg(OPT_analysis_CFGAddInitializers);
865   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
866   Opts.EnableExperimentalInternalChecks =
867     Args.hasArg(OPT_analyzer_experimental_internal_checks);
868   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
869   Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
870   Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
871   Opts.InlineCall = Args.hasArg(OPT_analyzer_inline_call);
872   Opts.IdempotentOps = Args.hasArg(OPT_analysis_WarnIdempotentOps);
873   Opts.ObjCSelfInitCheck = Args.hasArg(OPT_analysis_WarnObjCSelfInit);
874   Opts.BufferOverflows = Args.hasArg(OPT_analysis_WarnBufferOverflows);
875 }
876 
877 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
878                              Diagnostic &Diags) {
879   using namespace cc1options;
880 
881   Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
882   if (Opts.OptimizationLevel > 3) {
883     Diags.Report(diag::err_drv_invalid_value)
884       << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
885     Opts.OptimizationLevel = 3;
886   }
887 
888   // We must always run at least the always inlining pass.
889   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
890     : CodeGenOptions::OnlyAlwaysInlining;
891 
892   Opts.DebugInfo = Args.hasArg(OPT_g);
893   Opts.LimitDebugInfo = Args.hasArg(OPT_flimit_debug_info);
894   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
895   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
896   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
897   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
898   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
899   Opts.NoCommon = Args.hasArg(OPT_fno_common);
900   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
901   Opts.OptimizeSize = Args.hasArg(OPT_Os);
902   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
903                             Args.hasArg(OPT_ffreestanding));
904   Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
905                      (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
906 
907   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
908   Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
909   Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
910   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
911   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
912   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
913   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
914   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
915   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
916   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
917   Opts.NoInfsFPMath = Opts.NoNaNsFPMath = Args.hasArg(OPT_cl_finite_math_only)||
918                                           Args.hasArg(OPT_cl_fast_relaxed_math);
919   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
920   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
921   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
922   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
923   Opts.UnsafeFPMath = Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
924                       Args.hasArg(OPT_cl_fast_relaxed_math);
925   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
926   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
927 
928   Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
929   Opts.DataSections = Args.hasArg(OPT_fdata_sections);
930 
931   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
932   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
933 
934   Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
935 
936   if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
937     llvm::StringRef Name = A->getValue(Args);
938     unsigned Method = llvm::StringSwitch<unsigned>(Name)
939       .Case("legacy", CodeGenOptions::Legacy)
940       .Case("non-legacy", CodeGenOptions::NonLegacy)
941       .Case("mixed", CodeGenOptions::Mixed)
942       .Default(~0U);
943     if (Method == ~0U)
944       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
945     else
946       Opts.ObjCDispatchMethod = Method;
947   }
948 }
949 
950 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
951                                       ArgList &Args) {
952   using namespace cc1options;
953   Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
954   Opts.Targets = Args.getAllArgValues(OPT_MT);
955   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
956   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
957 }
958 
959 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
960                                 Diagnostic &Diags) {
961   using namespace cc1options;
962   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
963   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
964   Opts.Pedantic = Args.hasArg(OPT_pedantic);
965   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
966   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
967   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
968   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
969   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
970   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
971   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
972 
973   llvm::StringRef ShowOverloads =
974     Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
975   if (ShowOverloads == "best")
976     Opts.ShowOverloads = Diagnostic::Ovl_Best;
977   else if (ShowOverloads == "all")
978     Opts.ShowOverloads = Diagnostic::Ovl_All;
979   else
980     Diags.Report(diag::err_drv_invalid_value)
981       << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
982       << ShowOverloads;
983 
984   llvm::StringRef ShowCategory =
985     Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
986   if (ShowCategory == "none")
987     Opts.ShowCategories = 0;
988   else if (ShowCategory == "id")
989     Opts.ShowCategories = 1;
990   else if (ShowCategory == "name")
991     Opts.ShowCategories = 2;
992   else
993     Diags.Report(diag::err_drv_invalid_value)
994       << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
995       << ShowCategory;
996 
997   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
998   Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
999   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1000   Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1001   Opts.MacroBacktraceLimit
1002     = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1003                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1004   Opts.TemplateBacktraceLimit
1005     = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1006                          DiagnosticOptions::DefaultTemplateBacktraceLimit,
1007                          Diags);
1008   Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1009                                     DiagnosticOptions::DefaultTabStop, Diags);
1010   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1011     Diags.Report(diag::warn_ignoring_ftabstop_value)
1012       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1013     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1014   }
1015   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1016   Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1017   Opts.Warnings = Args.getAllArgValues(OPT_W);
1018 }
1019 
1020 static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1021   Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1022 }
1023 
1024 static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1025                                    Diagnostic &Diags) {
1026   using namespace cc1options;
1027   Opts.ProgramAction = frontend::ParseSyntaxOnly;
1028   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1029     switch (A->getOption().getID()) {
1030     default:
1031       assert(0 && "Invalid option in group!");
1032     case OPT_ast_dump:
1033       Opts.ProgramAction = frontend::ASTDump; break;
1034     case OPT_ast_dump_xml:
1035       Opts.ProgramAction = frontend::ASTDumpXML; break;
1036     case OPT_ast_print:
1037       Opts.ProgramAction = frontend::ASTPrint; break;
1038     case OPT_ast_print_xml:
1039       Opts.ProgramAction = frontend::ASTPrintXML; break;
1040     case OPT_ast_view:
1041       Opts.ProgramAction = frontend::ASTView; break;
1042     case OPT_boostcon:
1043       Opts.ProgramAction = frontend::BoostCon; break;
1044     case OPT_dump_raw_tokens:
1045       Opts.ProgramAction = frontend::DumpRawTokens; break;
1046     case OPT_dump_tokens:
1047       Opts.ProgramAction = frontend::DumpTokens; break;
1048     case OPT_S:
1049       Opts.ProgramAction = frontend::EmitAssembly; break;
1050     case OPT_emit_llvm_bc:
1051       Opts.ProgramAction = frontend::EmitBC; break;
1052     case OPT_emit_html:
1053       Opts.ProgramAction = frontend::EmitHTML; break;
1054     case OPT_emit_llvm:
1055       Opts.ProgramAction = frontend::EmitLLVM; break;
1056     case OPT_emit_llvm_only:
1057       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1058     case OPT_emit_codegen_only:
1059       Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1060     case OPT_emit_obj:
1061       Opts.ProgramAction = frontend::EmitObj; break;
1062     case OPT_fixit_EQ:
1063       Opts.FixItSuffix = A->getValue(Args);
1064       // fall-through!
1065     case OPT_fixit:
1066       Opts.ProgramAction = frontend::FixIt; break;
1067     case OPT_emit_pch:
1068       Opts.ProgramAction = frontend::GeneratePCH; break;
1069     case OPT_emit_pth:
1070       Opts.ProgramAction = frontend::GeneratePTH; break;
1071     case OPT_init_only:
1072       Opts.ProgramAction = frontend::InitOnly; break;
1073     case OPT_fsyntax_only:
1074       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1075     case OPT_print_decl_contexts:
1076       Opts.ProgramAction = frontend::PrintDeclContext; break;
1077     case OPT_print_preamble:
1078       Opts.ProgramAction = frontend::PrintPreamble; break;
1079     case OPT_E:
1080       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1081     case OPT_rewrite_macros:
1082       Opts.ProgramAction = frontend::RewriteMacros; break;
1083     case OPT_rewrite_objc:
1084       Opts.ProgramAction = frontend::RewriteObjC; break;
1085     case OPT_rewrite_test:
1086       Opts.ProgramAction = frontend::RewriteTest; break;
1087     case OPT_analyze:
1088       Opts.ProgramAction = frontend::RunAnalysis; break;
1089     case OPT_Eonly:
1090       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1091     case OPT_create_module:
1092       Opts.ProgramAction = frontend::CreateModule; break;
1093     }
1094   }
1095 
1096   if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1097     Opts.Plugins.push_back(A->getValue(Args,0));
1098     Opts.ProgramAction = frontend::PluginAction;
1099     Opts.ActionName = A->getValue(Args);
1100 
1101     for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1102            end = Args.filtered_end(); it != end; ++it) {
1103       if ((*it)->getValue(Args, 0) == Opts.ActionName)
1104         Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1105     }
1106   }
1107 
1108   Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1109 
1110   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1111     Opts.CodeCompletionAt =
1112       ParsedSourceLocation::FromString(A->getValue(Args));
1113     if (Opts.CodeCompletionAt.FileName.empty())
1114       Diags.Report(diag::err_drv_invalid_value)
1115         << A->getAsString(Args) << A->getValue(Args);
1116   }
1117   Opts.DisableFree = Args.hasArg(OPT_disable_free);
1118 
1119   Opts.OutputFile = Args.getLastArgValue(OPT_o);
1120   Opts.Plugins = Args.getAllArgValues(OPT_load);
1121   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1122   Opts.ChainedPCH = Args.hasArg(OPT_chained_pch);
1123   Opts.ShowHelp = Args.hasArg(OPT_help);
1124   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
1125   Opts.ShowCodePatternsInCodeCompletion
1126     = Args.hasArg(OPT_code_completion_patterns);
1127   Opts.ShowGlobalSymbolsInCodeCompletion
1128     = !Args.hasArg(OPT_no_code_completion_globals);
1129   Opts.ShowStats = Args.hasArg(OPT_print_stats);
1130   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1131   Opts.ShowVersion = Args.hasArg(OPT_version);
1132   Opts.ViewClassInheritance = Args.getLastArgValue(OPT_cxx_inheritance_view);
1133   Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1134   Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1135   Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1136   Opts.Modules = Args.getAllArgValues(OPT_import_module);
1137 
1138   InputKind DashX = IK_None;
1139   if (const Arg *A = Args.getLastArg(OPT_x)) {
1140     DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1141       .Case("c", IK_C)
1142       .Case("cl", IK_OpenCL)
1143       .Case("c", IK_C)
1144       .Case("cl", IK_OpenCL)
1145       .Case("cuda", IK_CUDA)
1146       .Case("c++", IK_CXX)
1147       .Case("objective-c", IK_ObjC)
1148       .Case("objective-c++", IK_ObjCXX)
1149       .Case("cpp-output", IK_PreprocessedC)
1150       .Case("assembler-with-cpp", IK_Asm)
1151       .Case("c++-cpp-output", IK_PreprocessedCXX)
1152       .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1153       .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1154       .Case("c-header", IK_C)
1155       .Case("objective-c-header", IK_ObjC)
1156       .Case("c++-header", IK_CXX)
1157       .Case("objective-c++-header", IK_ObjCXX)
1158       .Case("ast", IK_AST)
1159       .Case("ir", IK_LLVM_IR)
1160       .Default(IK_None);
1161     if (DashX == IK_None)
1162       Diags.Report(diag::err_drv_invalid_value)
1163         << A->getAsString(Args) << A->getValue(Args);
1164   }
1165 
1166   // '-' is the default input if none is given.
1167   std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1168   Opts.Inputs.clear();
1169   if (Inputs.empty())
1170     Inputs.push_back("-");
1171   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1172     InputKind IK = DashX;
1173     if (IK == IK_None) {
1174       IK = FrontendOptions::getInputKindForExtension(
1175         llvm::StringRef(Inputs[i]).rsplit('.').second);
1176       // FIXME: Remove this hack.
1177       if (i == 0)
1178         DashX = IK;
1179     }
1180     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
1181   }
1182 
1183   return DashX;
1184 }
1185 
1186 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1187                                                  void *MainAddr) {
1188   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1189 
1190   if (!P.isEmpty()) {
1191     P.eraseComponent();  // Remove /clang from foo/bin/clang
1192     P.eraseComponent();  // Remove /bin   from foo/bin
1193 
1194     // Get foo/lib/clang/<version>/include
1195     P.appendComponent("lib");
1196     P.appendComponent("clang");
1197     P.appendComponent(CLANG_VERSION_STRING);
1198   }
1199 
1200   return P.str();
1201 }
1202 
1203 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1204   using namespace cc1options;
1205   Opts.CXXSystemIncludes = Args.getAllArgValues(OPT_cxx_system_include);
1206   Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1207   Opts.Verbose = Args.hasArg(OPT_v);
1208   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1209   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
1210   Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1211   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1212 
1213   // Add -I... and -F... options in order.
1214   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
1215          ie = Args.filtered_end(); it != ie; ++it)
1216     Opts.AddPath((*it)->getValue(Args), frontend::Angled, true,
1217                  /*IsFramework=*/ (*it)->getOption().matches(OPT_F), true);
1218 
1219   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1220   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1221   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1222                                              OPT_iwithprefixbefore),
1223          ie = Args.filtered_end(); it != ie; ++it) {
1224     const Arg *A = *it;
1225     if (A->getOption().matches(OPT_iprefix))
1226       Prefix = A->getValue(Args);
1227     else if (A->getOption().matches(OPT_iwithprefix))
1228       Opts.AddPath(Prefix.str() + A->getValue(Args),
1229                    frontend::System, false, false, true);
1230     else
1231       Opts.AddPath(Prefix.str() + A->getValue(Args),
1232                    frontend::Angled, false, false, true);
1233   }
1234 
1235   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1236          ie = Args.filtered_end(); it != ie; ++it)
1237     Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, true);
1238   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1239          ie = Args.filtered_end(); it != ie; ++it)
1240     Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, true);
1241   for (arg_iterator it = Args.filtered_begin(OPT_isystem, OPT_iwithsysroot),
1242          ie = Args.filtered_end(); it != ie; ++it)
1243     Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1244                  (*it)->getOption().matches(OPT_iwithsysroot));
1245 
1246   // FIXME: Need options for the various environment variables!
1247 }
1248 
1249 void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1250                                          LangStandard::Kind LangStd) {
1251   // Set some properties which depend soley on the input kind; it would be nice
1252   // to move these to the language standard, and have the driver resolve the
1253   // input kind + language standard.
1254   if (IK == IK_Asm) {
1255     Opts.AsmPreprocessor = 1;
1256   } else if (IK == IK_ObjC ||
1257              IK == IK_ObjCXX ||
1258              IK == IK_PreprocessedObjC ||
1259              IK == IK_PreprocessedObjCXX) {
1260     Opts.ObjC1 = Opts.ObjC2 = 1;
1261   }
1262 
1263   if (LangStd == LangStandard::lang_unspecified) {
1264     // Based on the base language, pick one.
1265     switch (IK) {
1266     case IK_None:
1267     case IK_AST:
1268     case IK_LLVM_IR:
1269       assert(0 && "Invalid input kind!");
1270     case IK_OpenCL:
1271       LangStd = LangStandard::lang_opencl;
1272       break;
1273     case IK_CUDA:
1274       LangStd = LangStandard::lang_cuda;
1275       break;
1276     case IK_Asm:
1277     case IK_C:
1278     case IK_PreprocessedC:
1279     case IK_ObjC:
1280     case IK_PreprocessedObjC:
1281       LangStd = LangStandard::lang_gnu99;
1282       break;
1283     case IK_CXX:
1284     case IK_PreprocessedCXX:
1285     case IK_ObjCXX:
1286     case IK_PreprocessedObjCXX:
1287       LangStd = LangStandard::lang_gnucxx98;
1288       break;
1289     }
1290   }
1291 
1292   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1293   Opts.BCPLComment = Std.hasBCPLComments();
1294   Opts.C99 = Std.isC99();
1295   Opts.CPlusPlus = Std.isCPlusPlus();
1296   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1297   Opts.Digraphs = Std.hasDigraphs();
1298   Opts.GNUMode = Std.isGNUMode();
1299   Opts.GNUInline = !Std.isC99();
1300   Opts.HexFloats = Std.hasHexFloats();
1301   Opts.ImplicitInt = Std.hasImplicitInt();
1302 
1303   // OpenCL has some additional defaults.
1304   if (LangStd == LangStandard::lang_opencl) {
1305     Opts.OpenCL = 1;
1306     Opts.AltiVec = 1;
1307     Opts.CXXOperatorNames = 1;
1308     Opts.LaxVectorConversions = 1;
1309   }
1310 
1311   if (LangStd == LangStandard::lang_cuda)
1312     Opts.CUDA = 1;
1313 
1314   // OpenCL and C++ both have bool, true, false keywords.
1315   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1316 
1317   Opts.GNUKeywords = Opts.GNUMode;
1318   Opts.CXXOperatorNames = Opts.CPlusPlus;
1319 
1320   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1321   // is specified, or -std is set to a conforming mode.
1322   Opts.Trigraphs = !Opts.GNUMode;
1323 
1324   Opts.DollarIdents = !Opts.AsmPreprocessor;
1325 }
1326 
1327 static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1328                           Diagnostic &Diags) {
1329   // FIXME: Cleanup per-file based stuff.
1330   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1331   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1332     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1333 #define LANGSTANDARD(id, name, desc, features) \
1334       .Case(name, LangStandard::lang_##id)
1335 #include "clang/Frontend/LangStandards.def"
1336       .Default(LangStandard::lang_unspecified);
1337     if (LangStd == LangStandard::lang_unspecified)
1338       Diags.Report(diag::err_drv_invalid_value)
1339         << A->getAsString(Args) << A->getValue(Args);
1340   }
1341 
1342   if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1343     if (strcmp(A->getValue(Args), "CL1.1") != 0) {
1344       Diags.Report(diag::err_drv_invalid_value)
1345         << A->getAsString(Args) << A->getValue(Args);
1346     }
1347   }
1348 
1349   CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1350 
1351   // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1352   // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1353   // while a subset (the non-C++ GNU keywords) is provided by GCC's
1354   // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1355   // name, as it doesn't seem a useful distinction.
1356   Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1357                                   Opts.GNUKeywords);
1358 
1359   if (Args.hasArg(OPT_fno_operator_names))
1360     Opts.CXXOperatorNames = 0;
1361 
1362   if (Args.hasArg(OPT_fobjc_gc_only))
1363     Opts.setGCMode(LangOptions::GCOnly);
1364   else if (Args.hasArg(OPT_fobjc_gc))
1365     Opts.setGCMode(LangOptions::HybridGC);
1366 
1367   if (Args.hasArg(OPT_fapple_kext))
1368     Opts.AppleKext = 1;
1369   if (Args.hasArg(OPT_print_ivar_layout))
1370     Opts.ObjCGCBitmapPrint = 1;
1371   if (Args.hasArg(OPT_fno_constant_cfstrings))
1372     Opts.NoConstantCFStrings = 1;
1373 
1374   if (Args.hasArg(OPT_faltivec))
1375     Opts.AltiVec = 1;
1376 
1377   if (Args.hasArg(OPT_pthread))
1378     Opts.POSIXThreads = 1;
1379 
1380   llvm::StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
1381   if (Vis == "default")
1382     Opts.setVisibilityMode(DefaultVisibility);
1383   else if (Vis == "hidden")
1384     Opts.setVisibilityMode(HiddenVisibility);
1385   else if (Vis == "protected")
1386     Opts.setVisibilityMode(ProtectedVisibility);
1387   else
1388     Diags.Report(diag::err_drv_invalid_value)
1389       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1390 
1391   if (Args.hasArg(OPT_fvisibility_inlines_hidden))
1392     Opts.InlineVisibilityHidden = 1;
1393 
1394   if (Args.hasArg(OPT_ftrapv)) {
1395     Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
1396     // Set the handler, if one is specified.
1397     Opts.OverflowHandler =
1398         Args.getLastArgValue(OPT_ftrapv_handler);
1399   }
1400   else if (Args.hasArg(OPT_fwrapv))
1401     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
1402 
1403   if (Args.hasArg(OPT_trigraphs))
1404     Opts.Trigraphs = 1;
1405 
1406   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1407                                    OPT_fno_dollars_in_identifiers,
1408                                    Opts.DollarIdents);
1409   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1410   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1411   Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
1412   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
1413   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1414   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
1415   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1416     Opts.LaxVectorConversions = 0;
1417   if (Args.hasArg(OPT_fno_threadsafe_statics))
1418     Opts.ThreadsafeStatics = 0;
1419   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1420   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1421   Opts.Blocks = Args.hasArg(OPT_fblocks);
1422   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1423   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1424   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
1425   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1426   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1427   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1428   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1429   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
1430   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1431   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1432   Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 1024,
1433                                                Diags);
1434   Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy,
1435                                                     0, Diags);
1436   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1437   Opts.ObjCConstantStringClass =
1438     Args.getLastArgValue(OPT_fconstant_string_class);
1439   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1440   if (Opts.ObjCNonFragileABI)
1441     Opts.ObjCNonFragileABI2 = true;
1442   Opts.ObjCDefaultSynthProperties =
1443     Args.hasArg(OPT_fobjc_default_synthesize_properties);
1444   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1445   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1446   Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
1447   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
1448   Opts.Static = Args.hasArg(OPT_static_define);
1449   Opts.DumpRecordLayouts = Args.hasArg(OPT_fdump_record_layouts);
1450   Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
1451   Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
1452   Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
1453   Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
1454   Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
1455   Opts.OptimizeSize = 0;
1456 
1457   // FIXME: Eliminate this dependency.
1458   unsigned Opt = getOptimizationLevel(Args, IK, Diags);
1459   Opts.Optimize = Opt != 0;
1460 
1461   // This is the __NO_INLINE__ define, which just depends on things like the
1462   // optimization level and -fno-inline, not actually whether the backend has
1463   // inlining enabled.
1464   //
1465   // FIXME: This is affected by other options (-fno-inline).
1466   Opts.NoInline = !Opt;
1467 
1468   unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
1469   switch (SSP) {
1470   default:
1471     Diags.Report(diag::err_drv_invalid_value)
1472       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1473     break;
1474   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1475   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1476   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1477   }
1478 }
1479 
1480 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1481                                   FileManager &FileMgr,
1482                                   Diagnostic &Diags) {
1483   using namespace cc1options;
1484   Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
1485   Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
1486   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1487       Opts.TokenCache = A->getValue(Args);
1488   else
1489     Opts.TokenCache = Opts.ImplicitPTHInclude;
1490   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1491   Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
1492   Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
1493 
1494   Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
1495   for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
1496          ie = Args.filtered_end(); it != ie; ++it) {
1497     const Arg *A = *it;
1498     Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
1499   }
1500 
1501   if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
1502     llvm::StringRef Value(A->getValue(Args));
1503     size_t Comma = Value.find(',');
1504     unsigned Bytes = 0;
1505     unsigned EndOfLine = 0;
1506 
1507     if (Comma == llvm::StringRef::npos ||
1508         Value.substr(0, Comma).getAsInteger(10, Bytes) ||
1509         Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
1510       Diags.Report(diag::err_drv_preamble_format);
1511     else {
1512       Opts.PrecompiledPreambleBytes.first = Bytes;
1513       Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
1514     }
1515   }
1516 
1517   // Add macros from the command line.
1518   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1519          ie = Args.filtered_end(); it != ie; ++it) {
1520     if ((*it)->getOption().matches(OPT_D))
1521       Opts.addMacroDef((*it)->getValue(Args));
1522     else
1523       Opts.addMacroUndef((*it)->getValue(Args));
1524   }
1525 
1526   Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
1527 
1528   // Add the ordered list of -includes.
1529   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1530                                              OPT_include_pth),
1531          ie = Args.filtered_end(); it != ie; ++it) {
1532     const Arg *A = *it;
1533     // PCH is handled specially, we need to extra the original include path.
1534     if (A->getOption().matches(OPT_include_pch)) {
1535       std::string OriginalFile =
1536         ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
1537       if (OriginalFile.empty())
1538         continue;
1539 
1540       Opts.Includes.push_back(OriginalFile);
1541     } else
1542       Opts.Includes.push_back(A->getValue(Args));
1543   }
1544 
1545   // Include 'altivec.h' if -faltivec option present
1546   if (Args.hasArg(OPT_faltivec))
1547     Opts.Includes.push_back("altivec.h");
1548 
1549   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1550          ie = Args.filtered_end(); it != ie; ++it) {
1551     const Arg *A = *it;
1552     std::pair<llvm::StringRef,llvm::StringRef> Split =
1553       llvm::StringRef(A->getValue(Args)).split(';');
1554 
1555     if (Split.second.empty()) {
1556       Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
1557       continue;
1558     }
1559 
1560     Opts.addRemappedFile(Split.first, Split.second);
1561   }
1562 }
1563 
1564 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1565                                         ArgList &Args) {
1566   using namespace cc1options;
1567   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1568   Opts.ShowComments = Args.hasArg(OPT_C);
1569   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1570   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1571   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1572   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1573 }
1574 
1575 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1576   using namespace cc1options;
1577   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
1578   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
1579   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
1580   Opts.Features = Args.getAllArgValues(OPT_target_feature);
1581   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
1582   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
1583 
1584   // Use the host triple if unspecified.
1585   if (Opts.Triple.empty())
1586     Opts.Triple = llvm::sys::getHostTriple();
1587 }
1588 
1589 //
1590 
1591 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1592                                         const char *const *ArgBegin,
1593                                         const char *const *ArgEnd,
1594                                         Diagnostic &Diags) {
1595   // Parse the arguments.
1596   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1597   unsigned MissingArgIndex, MissingArgCount;
1598   llvm::OwningPtr<InputArgList> Args(
1599     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1600 
1601   // Check for missing argument error.
1602   if (MissingArgCount)
1603     Diags.Report(diag::err_drv_missing_argument)
1604       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1605 
1606   // Issue errors on unknown arguments.
1607   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1608          ie = Args->filtered_end(); it != ie; ++it)
1609     Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
1610 
1611   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1612   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1613   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1614   ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
1615   // FIXME: We shouldn't have to pass the DashX option around here
1616   InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1617   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags);
1618   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1619   if (DashX != IK_AST && DashX != IK_LLVM_IR)
1620     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1621   // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
1622   // PCH file and find the original header name. Remove the need to do that in
1623   // ParsePreprocessorArgs and remove the FileManager
1624   // parameters from the function and the "FileManager.h" #include.
1625   FileManager FileMgr(Res.getFileSystemOpts());
1626   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
1627   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1628   ParseTargetArgs(Res.getTargetOpts(), *Args);
1629 }
1630