CompilerInvocation.cpp revision 200583 
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"
29using namespace clang;
30
31static 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
41static 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
51static 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
61static 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
75static 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
117static 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.MergeAllConstants)
126    Res.push_back("-fno-merge-all-constants");
127  if (Opts.NoCommon)
128    Res.push_back("-fno-common");
129  if (Opts.NoImplicitFloat)
130    Res.push_back("-no-implicit-float");
131  if (Opts.OptimizeSize) {
132    assert(Opts.OptimizationLevel == 2 && "Invalid options!");
133    Res.push_back("-Os");
134  } else if (Opts.OptimizationLevel != 0)
135    Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
136  if (!Opts.MainFileName.empty()) {
137    Res.push_back("-main-file-name");
138    Res.push_back(Opts.MainFileName);
139  }
140  // SimplifyLibCalls is only derived.
141  // TimePasses is only derived.
142  // UnitAtATime is unused.
143  // UnrollLoops is only derived.
144  // VerifyModule is only derived.
145  // Inlining is only derived.
146
147  if (Opts.AsmVerbose)
148    Res.push_back("-masm-verbose");
149  if (!Opts.CodeModel.empty()) {
150    Res.push_back("-mcode-model");
151    Res.push_back(Opts.CodeModel);
152  }
153  if (!Opts.DebugPass.empty()) {
154    Res.push_back("-mdebug-pass");
155    Res.push_back(Opts.DebugPass);
156  }
157  if (Opts.DisableFPElim)
158    Res.push_back("-mdisable-fp-elim");
159  if (!Opts.FloatABI.empty()) {
160    Res.push_back("-mfloat-abi");
161    Res.push_back(Opts.FloatABI);
162  }
163  if (!Opts.LimitFloatPrecision.empty()) {
164    Res.push_back("-mlimit-float-precision");
165    Res.push_back(Opts.LimitFloatPrecision);
166  }
167  if (Opts.NoZeroInitializedInBSS)
168    Res.push_back("-mno-zero-initialized-bss");
169  if (Opts.SoftFloat)
170    Res.push_back("-msoft-float");
171  if (Opts.UnwindTables)
172    Res.push_back("-munwind-tables");
173  if (Opts.RelocationModel != "pic") {
174    Res.push_back("-mrelocation-model");
175    Res.push_back(Opts.RelocationModel);
176  }
177}
178
179static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
180                                       std::vector<std::string> &Res) {
181  if (Opts.IncludeSystemHeaders)
182    Res.push_back("-sys-header-deps");
183  if (Opts.UsePhonyTargets)
184    Res.push_back("-MP");
185  if (!Opts.OutputFile.empty()) {
186    Res.push_back("-dependency-file");
187    Res.push_back(Opts.OutputFile);
188  }
189  for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
190    Res.push_back("-MT");
191    Res.push_back(Opts.Targets[i]);
192  }
193}
194
195static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
196                                 std::vector<std::string> &Res) {
197  if (Opts.IgnoreWarnings)
198    Res.push_back("-w");
199  if (Opts.NoRewriteMacros)
200    Res.push_back("-Wno-rewrite-macros");
201  if (Opts.Pedantic)
202    Res.push_back("-pedantic");
203  if (Opts.PedanticErrors)
204    Res.push_back("-pedantic-errors");
205  if (!Opts.ShowColumn)
206    Res.push_back("-fno-show-column");
207  if (!Opts.ShowLocation)
208    Res.push_back("-fno-show-source-location");
209  if (!Opts.ShowCarets)
210    Res.push_back("-fno-caret-diagnostics");
211  if (!Opts.ShowFixits)
212    Res.push_back("-fno-diagnostics-fixit-info");
213  if (Opts.ShowSourceRanges)
214    Res.push_back("-fdiagnostics-print-source-range-info");
215  if (Opts.ShowColors)
216    Res.push_back("-fcolor-diagnostics");
217  if (Opts.VerifyDiagnostics)
218    Res.push_back("-verify");
219  if (Opts.ShowOptionNames)
220    Res.push_back("-fdiagnostics-show-option");
221  if (Opts.MessageLength) {
222    Res.push_back("-fmessage-length");
223    Res.push_back(llvm::utostr(Opts.MessageLength));
224  }
225  if (!Opts.DumpBuildInformation.empty()) {
226    Res.push_back("-dump-build-information");
227    Res.push_back(Opts.DumpBuildInformation);
228  }
229  for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
230    Res.push_back("-W" + Opts.Warnings[i]);
231}
232
233static const char *getInputKindName(FrontendOptions::InputKind Kind) {
234  switch (Kind) {
235  case FrontendOptions::IK_None:              break;
236  case FrontendOptions::IK_AST:               return "ast";
237  case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
238  case FrontendOptions::IK_C:                 return "c";
239  case FrontendOptions::IK_CXX:               return "c++";
240  case FrontendOptions::IK_ObjC:              return "objective-c";
241  case FrontendOptions::IK_ObjCXX:            return "objective-c++";
242  case FrontendOptions::IK_OpenCL:            return "cl";
243  case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
244  case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
245  case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
246  case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
247  }
248
249  llvm_unreachable("Unexpected language kind!");
250  return 0;
251}
252
253static const char *getActionName(frontend::ActionKind Kind) {
254  switch (Kind) {
255  case frontend::PluginAction:
256  case frontend::InheritanceView:
257    llvm_unreachable("Invalid kind!");
258
259  case frontend::ASTDump:                return "-ast-dump";
260  case frontend::ASTPrint:               return "-ast-print";
261  case frontend::ASTPrintXML:            return "-ast-print-xml";
262  case frontend::ASTView:                return "-ast-view";
263  case frontend::DumpRawTokens:          return "-dump-raw-tokens";
264  case frontend::DumpRecordLayouts:      return "-dump-record-layouts";
265  case frontend::DumpTokens:             return "-dump-tokens";
266  case frontend::EmitAssembly:           return "-S";
267  case frontend::EmitBC:                 return "-emit-llvm-bc";
268  case frontend::EmitHTML:               return "-emit-html";
269  case frontend::EmitLLVM:               return "-emit-llvm";
270  case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
271  case frontend::FixIt:                  return "-fixit";
272  case frontend::GeneratePCH:            return "-emit-pch";
273  case frontend::GeneratePTH:            return "-emit-pth";
274  case frontend::ParseNoop:              return "-parse-noop";
275  case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
276  case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
277  case frontend::PrintDeclContext:       return "-print-decl-contexts";
278  case frontend::PrintPreprocessedInput: return "-E";
279  case frontend::RewriteBlocks:          return "-rewrite-blocks";
280  case frontend::RewriteMacros:          return "-rewrite-macros";
281  case frontend::RewriteObjC:            return "-rewrite-objc";
282  case frontend::RewriteTest:            return "-rewrite-test";
283  case frontend::RunAnalysis:            return "-analyze";
284  case frontend::RunPreprocessorOnly:    return "-Eonly";
285  }
286
287  llvm_unreachable("Unexpected language kind!");
288  return 0;
289}
290
291static void FrontendOptsToArgs(const FrontendOptions &Opts,
292                               std::vector<std::string> &Res) {
293  if (!Opts.DebugCodeCompletionPrinter)
294    Res.push_back("-no-code-completion-debug-printer");
295  if (Opts.DisableFree)
296    Res.push_back("-disable-free");
297  if (Opts.EmptyInputOnly)
298    Res.push_back("-empty-input-only");
299  if (Opts.RelocatablePCH)
300    Res.push_back("-relocatable-pch");
301  if (Opts.ShowHelp)
302    Res.push_back("-help");
303  if (Opts.ShowMacrosInCodeCompletion)
304    Res.push_back("-code-completion-macros");
305  if (Opts.ShowStats)
306    Res.push_back("-print-stats");
307  if (Opts.ShowTimers)
308    Res.push_back("-ftime-report");
309  if (Opts.ShowVersion)
310    Res.push_back("-version");
311
312  bool NeedLang = false;
313  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
314    if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
315        Opts.Inputs[i].first)
316      NeedLang = true;
317  if (NeedLang) {
318    Res.push_back("-x");
319    Res.push_back(getInputKindName(Opts.Inputs[0].first));
320  }
321  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
322    assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
323           "Unable to represent this input vector!");
324    Res.push_back(Opts.Inputs[i].second);
325  }
326
327  if (!Opts.OutputFile.empty()) {
328    Res.push_back("-o");
329    Res.push_back(Opts.OutputFile);
330  }
331  if (!Opts.ViewClassInheritance.empty()) {
332    Res.push_back("-cxx-inheritance-view");
333    Res.push_back(Opts.ViewClassInheritance);
334  }
335  for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
336    Res.push_back("-fixit-at");
337    Res.push_back(Opts.FixItLocations[i].FileName + ":" +
338                  llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
339                  llvm::utostr(Opts.FixItLocations[i].Column));
340  }
341  if (!Opts.CodeCompletionAt.FileName.empty()) {
342    Res.push_back("-code-completion-at");
343    Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
344                  llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
345                  llvm::utostr(Opts.CodeCompletionAt.Column));
346  }
347  if (Opts.ProgramAction != frontend::InheritanceView &&
348      Opts.ProgramAction != frontend::PluginAction)
349    Res.push_back(getActionName(Opts.ProgramAction));
350  if (!Opts.ActionName.empty()) {
351    Res.push_back("-plugin");
352    Res.push_back(Opts.ActionName);
353  }
354  for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
355    Res.push_back("-load");
356    Res.push_back(Opts.Plugins[i]);
357  }
358}
359
360static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
361                                   std::vector<std::string> &Res) {
362  if (Opts.Sysroot != "/") {
363    Res.push_back("-isysroot");
364    Res.push_back(Opts.Sysroot);
365  }
366
367  /// User specified include entries.
368  for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
369    const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
370    if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
371      llvm::llvm_report_error("Invalid option set!");
372    if (E.IsUserSupplied) {
373      if (E.Group == frontend::After) {
374        Res.push_back("-idirafter");
375      } else if (E.Group == frontend::Quoted) {
376        Res.push_back("-iquote");
377      } else if (E.Group == frontend::System) {
378        Res.push_back("-isystem");
379      } else {
380        assert(E.Group == frontend::Angled && "Invalid group!");
381        Res.push_back(E.IsFramework ? "-F" : "-I");
382      }
383    } else {
384      if (E.Group != frontend::Angled && E.Group != frontend::System)
385        llvm::llvm_report_error("Invalid option set!");
386      Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
387                    "-iwithprefix");
388    }
389    Res.push_back(E.Path);
390  }
391
392  if (!Opts.EnvIncPath.empty()) {
393    // FIXME: Provide an option for this, and move env detection to driver.
394    llvm::llvm_report_error("Not yet implemented!");
395  }
396  if (!Opts.CEnvIncPath.empty()) {
397    // FIXME: Provide an option for this, and move env detection to driver.
398    llvm::llvm_report_error("Not yet implemented!");
399  }
400  if (!Opts.ObjCEnvIncPath.empty()) {
401    // FIXME: Provide an option for this, and move env detection to driver.
402    llvm::llvm_report_error("Not yet implemented!");
403  }
404  if (!Opts.CXXEnvIncPath.empty()) {
405    // FIXME: Provide an option for this, and move env detection to driver.
406    llvm::llvm_report_error("Not yet implemented!");
407  }
408  if (!Opts.ObjCXXEnvIncPath.empty()) {
409    // FIXME: Provide an option for this, and move env detection to driver.
410    llvm::llvm_report_error("Not yet implemented!");
411  }
412  if (!Opts.ResourceDir.empty()) {
413    Res.push_back("-resource-dir");
414    Res.push_back(Opts.ResourceDir);
415  }
416  if (!Opts.UseStandardIncludes)
417    Res.push_back("-nostdinc");
418  if (Opts.Verbose)
419    Res.push_back("-v");
420}
421
422static void LangOptsToArgs(const LangOptions &Opts,
423                           std::vector<std::string> &Res) {
424  LangOptions DefaultLangOpts;
425
426  // FIXME: Need to set -std to get all the implicit options.
427
428  // FIXME: We want to only pass options relative to the defaults, which
429  // requires constructing a target. :(
430  //
431  // It would be better to push the all target specific choices into the driver,
432  // so that everything below that was more uniform.
433
434  if (Opts.Trigraphs)
435    Res.push_back("-trigraphs");
436  // Implicit based on the input kind:
437  //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
438  // Implicit based on the input language standard:
439  //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
440  if (Opts.DollarIdents)
441    Res.push_back("-fdollars-in-identifiers");
442  if (Opts.Microsoft)
443    Res.push_back("-fms-extensions=1");
444  if (Opts.ObjCNonFragileABI)
445    Res.push_back("-fobjc-nonfragile-abi");
446  // NoInline is implicit.
447  if (!Opts.CXXOperatorNames)
448    Res.push_back("-fno-operator-names");
449  if (Opts.PascalStrings)
450    Res.push_back("-fpascal-strings");
451  if (Opts.CatchUndefined)
452    Res.push_back("-fcatch-undefined-behavior");
453  if (Opts.WritableStrings)
454    Res.push_back("-fwritable-strings");
455  if (!Opts.LaxVectorConversions)
456    Res.push_back("-fno-lax-vector-conversions");
457  if (Opts.AltiVec)
458    Res.push_back("-faltivec");
459  if (Opts.Exceptions)
460    Res.push_back("-fexceptions");
461  if (!Opts.RTTI)
462    Res.push_back("-fno-rtti");
463  if (!Opts.NeXTRuntime)
464    Res.push_back("-fgnu-runtime");
465  if (Opts.Freestanding)
466    Res.push_back("-ffreestanding");
467  if (Opts.NoBuiltin)
468    Res.push_back("-fno-builtin");
469  if (Opts.ThreadsafeStatics)
470    llvm::llvm_report_error("FIXME: Not yet implemented!");
471  if (Opts.POSIXThreads)
472    Res.push_back("-pthread");
473  if (Opts.Blocks)
474    Res.push_back("-fblocks");
475  if (Opts.EmitAllDecls)
476    Res.push_back("-femit-all-decls");
477  if (!Opts.MathErrno)
478    Res.push_back("-fno-math-errno");
479  if (Opts.OverflowChecking)
480    Res.push_back("-ftrapv");
481  if (Opts.HeinousExtensions)
482    Res.push_back("-fheinous-gnu-extensions");
483  // Optimize is implicit.
484  // OptimizeSize is implicit.
485  if (Opts.Static)
486    Res.push_back("-static-define");
487  if (Opts.PICLevel) {
488    Res.push_back("-pic-level");
489    Res.push_back(llvm::utostr(Opts.PICLevel));
490  }
491  if (Opts.ObjCGCBitmapPrint)
492    Res.push_back("-print-ivar-layout");
493  // FIXME: Don't forget to update when the default changes!
494  if (Opts.AccessControl)
495    Res.push_back("-faccess-control");
496  if (!Opts.CharIsSigned)
497    Res.push_back("-fno-signed-char");
498  if (Opts.ShortWChar)
499    Res.push_back("-fshort-wchar");
500  if (!Opts.ElideConstructors)
501    Res.push_back("-fno-elide-constructors");
502  if (Opts.getGCMode() != LangOptions::NonGC) {
503    if (Opts.getGCMode() == LangOptions::HybridGC) {
504      Res.push_back("-fobjc-gc");
505    } else {
506      assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
507      Res.push_back("-fobjc-gc-only");
508    }
509  }
510  if (Opts.getVisibilityMode() != LangOptions::Default) {
511    Res.push_back("-fvisibility");
512    if (Opts.getVisibilityMode() == LangOptions::Hidden) {
513      Res.push_back("hidden");
514    } else {
515      assert(Opts.getVisibilityMode() == LangOptions::Protected &&
516             "Invalid visibility!");
517      Res.push_back("protected");
518    }
519  }
520  if (Opts.getStackProtectorMode() != 0) {
521    Res.push_back("-stack-protector");
522    Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
523  }
524  if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
525    Res.push_back("-ftemplate-depth");
526    Res.push_back(llvm::utostr(Opts.InstantiationDepth));
527  }
528  if (!Opts.ObjCConstantStringClass.empty()) {
529    Res.push_back("-fconstant-string-class");
530    Res.push_back(Opts.ObjCConstantStringClass);
531  }
532}
533
534static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
535                                   std::vector<std::string> &Res) {
536  for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
537    Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
538                  Opts.Macros[i].first);
539  for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
540    // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
541    Res.push_back("-include");
542    Res.push_back(Opts.Includes[i]);
543  }
544  for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
545    Res.push_back("-imacros");
546    Res.push_back(Opts.MacroIncludes[i]);
547  }
548  if (!Opts.UsePredefines)
549    Res.push_back("-undef");
550  if (!Opts.ImplicitPCHInclude.empty()) {
551    Res.push_back("-include-pch");
552    Res.push_back(Opts.ImplicitPCHInclude);
553  }
554  if (!Opts.ImplicitPTHInclude.empty()) {
555    Res.push_back("-include-pth");
556    Res.push_back(Opts.ImplicitPTHInclude);
557  }
558  if (!Opts.TokenCache.empty()) {
559    if (Opts.ImplicitPTHInclude.empty()) {
560      Res.push_back("-token-cache");
561      Res.push_back(Opts.TokenCache);
562    } else
563      assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
564             "Unsupported option combination!");
565  }
566  for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
567    Res.push_back("-remap-file");
568    Res.push_back(Opts.RemappedFiles[i].first + ";" +
569                  Opts.RemappedFiles[i].second);
570  }
571}
572
573static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
574                                         std::vector<std::string> &Res) {
575  if (!Opts.ShowCPP && !Opts.ShowMacros)
576    llvm::llvm_report_error("Invalid option combination!");
577
578  if (Opts.ShowCPP && Opts.ShowMacros)
579    Res.push_back("-dD");
580  else if (!Opts.ShowCPP && Opts.ShowMacros)
581    Res.push_back("-dM");
582
583  if (!Opts.ShowLineMarkers)
584    Res.push_back("-P");
585  if (Opts.ShowComments)
586    Res.push_back("-C");
587  if (Opts.ShowMacroComments)
588    Res.push_back("-CC");
589}
590
591static void TargetOptsToArgs(const TargetOptions &Opts,
592                             std::vector<std::string> &Res) {
593  Res.push_back("-triple");
594  Res.push_back(Opts.Triple);
595  if (!Opts.CPU.empty()) {
596    Res.push_back("-mcpu");
597    Res.push_back(Opts.CPU);
598  }
599  if (!Opts.ABI.empty()) {
600    Res.push_back("-target-abi");
601    Res.push_back(Opts.ABI);
602  }
603  for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
604    Res.push_back("-target-feature");
605    Res.push_back(Opts.Features[i]);
606  }
607}
608
609void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
610  AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
611  CodeGenOptsToArgs(getCodeGenOpts(), Res);
612  DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
613  DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
614  FrontendOptsToArgs(getFrontendOpts(), Res);
615  HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
616  LangOptsToArgs(getLangOpts(), Res);
617  PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
618  PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
619  TargetOptsToArgs(getTargetOpts(), Res);
620}
621
622//===----------------------------------------------------------------------===//
623// Deserialization (to args)
624//===----------------------------------------------------------------------===//
625
626using namespace clang::driver;
627using namespace clang::driver::cc1options;
628
629static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
630                                       llvm::StringRef Default = "") {
631  if (Arg *A = Args.getLastArg(ID))
632    return A->getValue(Args);
633  return Default;
634}
635
636static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
637                              int Default, Diagnostic &Diags) {
638  Arg *A = Args.getLastArg(ID);
639  if (!A)
640    return Default;
641
642  int Res = Default;
643  if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
644    Diags.Report(diag::err_drv_invalid_int_value)
645        << A->getAsString(Args) << A->getValue(Args);
646
647  return Res;
648}
649
650static std::vector<std::string>
651getAllArgValues(ArgList &Args, cc1options::ID ID) {
652  llvm::SmallVector<const char *, 16> Values;
653  Args.AddAllArgValues(Values, ID);
654  return std::vector<std::string>(Values.begin(), Values.end());
655}
656
657//
658
659static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
660                              Diagnostic &Diags) {
661  using namespace cc1options;
662
663  Opts.AnalysisList.clear();
664#define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
665  if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
666#include "clang/Frontend/Analyses.def"
667
668  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
669    llvm::StringRef Name = A->getValue(Args);
670    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
671#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
672      .Case(CMDFLAG, NAME##Model)
673#include "clang/Frontend/Analyses.def"
674      .Default(NumStores);
675    // FIXME: Error handling.
676    if (Value == NumStores)
677      Diags.Report(diag::err_drv_invalid_value)
678        << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
679    else
680      Opts.AnalysisStoreOpt = Value;
681  }
682
683  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
684    llvm::StringRef Name = A->getValue(Args);
685    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
686#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
687      .Case(CMDFLAG, NAME##Model)
688#include "clang/Frontend/Analyses.def"
689      .Default(NumConstraints);
690    // FIXME: Error handling.
691    if (Value == NumConstraints)
692      Diags.Report(diag::err_drv_invalid_value)
693        << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
694    else
695      Opts.AnalysisConstraintsOpt = Value;
696  }
697
698  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
699    llvm::StringRef Name = A->getValue(Args);
700    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
701#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
702      .Case(CMDFLAG, PD_##NAME)
703#include "clang/Frontend/Analyses.def"
704      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
705    // FIXME: Error handling.
706    if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
707      Diags.Report(diag::err_drv_invalid_value)
708        << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
709    else
710      Opts.AnalysisDiagOpt = Value;
711  }
712
713  Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
714  Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
715  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
716  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
717  Opts.AnalyzeNestedBlocks =
718    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
719  Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
720  Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
721  Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
722  Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
723  Opts.EnableExperimentalInternalChecks =
724    Args.hasArg(OPT_analyzer_experimental_internal_checks);
725  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
726}
727
728static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
729                             Diagnostic &Diags) {
730  using namespace cc1options;
731  // -Os implies -O2
732  if (Args.hasArg(OPT_Os))
733    Opts.OptimizationLevel = 2;
734  else {
735    Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
736    if (Opts.OptimizationLevel > 3) {
737      Diags.Report(diag::err_drv_invalid_value)
738        << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
739      Opts.OptimizationLevel = 3;
740    }
741  }
742
743  // We must always run at least the always inlining pass.
744  Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
745    : CodeGenOptions::OnlyAlwaysInlining;
746
747  Opts.DebugInfo = Args.hasArg(OPT_g);
748  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
749  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
750  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
751  Opts.NoCommon = Args.hasArg(OPT_fno_common);
752  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
753  Opts.OptimizeSize = Args.hasArg(OPT_Os);
754  Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
755
756  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
757  Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
758  Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
759  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
760  Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
761  Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
762  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
763  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
764  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
765  Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
766
767  Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
768
769  // FIXME: Put elsewhere?
770#ifdef NDEBUG
771  Opts.VerifyModule = 0;
772#else
773  Opts.VerifyModule = 1;
774#endif
775}
776
777static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
778                                      ArgList &Args) {
779  using namespace cc1options;
780  Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
781  Opts.Targets = getAllArgValues(Args, OPT_MT);
782  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
783  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
784}
785
786static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
787                                Diagnostic &Diags) {
788  using namespace cc1options;
789  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
790  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
791  Opts.Pedantic = Args.hasArg(OPT_pedantic);
792  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
793  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
794  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
795  Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
796  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
797  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
798  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
799  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
800  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
801  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
802  Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
803  Opts.Warnings = getAllArgValues(Args, OPT_W);
804}
805
806static FrontendOptions::InputKind
807ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
808  using namespace cc1options;
809  Opts.ProgramAction = frontend::ParseSyntaxOnly;
810  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
811    switch (A->getOption().getID()) {
812    default:
813      assert(0 && "Invalid option in group!");
814    case OPT_ast_dump:
815      Opts.ProgramAction = frontend::ASTDump; break;
816    case OPT_ast_print:
817      Opts.ProgramAction = frontend::ASTPrint; break;
818    case OPT_ast_print_xml:
819      Opts.ProgramAction = frontend::ASTPrintXML; break;
820    case OPT_ast_view:
821      Opts.ProgramAction = frontend::ASTView; break;
822    case OPT_dump_raw_tokens:
823      Opts.ProgramAction = frontend::DumpRawTokens; break;
824    case OPT_dump_record_layouts:
825      Opts.ProgramAction = frontend::DumpRecordLayouts; break;
826    case OPT_dump_tokens:
827      Opts.ProgramAction = frontend::DumpTokens; break;
828    case OPT_S:
829      Opts.ProgramAction = frontend::EmitAssembly; break;
830    case OPT_emit_llvm_bc:
831      Opts.ProgramAction = frontend::EmitBC; break;
832    case OPT_emit_html:
833      Opts.ProgramAction = frontend::EmitHTML; break;
834    case OPT_emit_llvm:
835      Opts.ProgramAction = frontend::EmitLLVM; break;
836    case OPT_emit_llvm_only:
837      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
838    case OPT_fixit:
839      Opts.ProgramAction = frontend::FixIt; break;
840    case OPT_emit_pch:
841      Opts.ProgramAction = frontend::GeneratePCH; break;
842    case OPT_emit_pth:
843      Opts.ProgramAction = frontend::GeneratePTH; break;
844    case OPT_parse_noop:
845      Opts.ProgramAction = frontend::ParseNoop; break;
846    case OPT_parse_print_callbacks:
847      Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
848    case OPT_fsyntax_only:
849      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
850    case OPT_print_decl_contexts:
851      Opts.ProgramAction = frontend::PrintDeclContext; break;
852    case OPT_E:
853      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
854    case OPT_rewrite_blocks:
855      Opts.ProgramAction = frontend::RewriteBlocks; break;
856    case OPT_rewrite_macros:
857      Opts.ProgramAction = frontend::RewriteMacros; break;
858    case OPT_rewrite_objc:
859      Opts.ProgramAction = frontend::RewriteObjC; break;
860    case OPT_rewrite_test:
861      Opts.ProgramAction = frontend::RewriteTest; break;
862    case OPT_analyze:
863      Opts.ProgramAction = frontend::RunAnalysis; break;
864    case OPT_Eonly:
865      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
866    }
867  }
868  if (const Arg *A = Args.getLastArg(OPT_plugin)) {
869    Opts.ProgramAction = frontend::PluginAction;
870    Opts.ActionName = A->getValue(Args);
871  }
872
873  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
874    Opts.CodeCompletionAt =
875      ParsedSourceLocation::FromString(A->getValue(Args));
876    if (Opts.CodeCompletionAt.FileName.empty())
877      Diags.Report(diag::err_drv_invalid_value)
878        << A->getAsString(Args) << A->getValue(Args);
879  }
880  Opts.DebugCodeCompletionPrinter =
881    !Args.hasArg(OPT_no_code_completion_debug_printer);
882  Opts.DisableFree = Args.hasArg(OPT_disable_free);
883  Opts.EmptyInputOnly = Args.hasArg(OPT_empty_input_only);
884
885  Opts.FixItLocations.clear();
886  for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
887         ie = Args.filtered_end(); it != ie; ++it) {
888    const char *Loc = it->getValue(Args);
889    ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
890
891    if (PSL.FileName.empty()) {
892      Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
893      continue;
894    }
895
896    Opts.FixItLocations.push_back(PSL);
897  }
898
899  Opts.OutputFile = getLastArgValue(Args, OPT_o);
900  Opts.Plugins = getAllArgValues(Args, OPT_load);
901  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
902  Opts.ShowHelp = Args.hasArg(OPT_help);
903  Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
904  Opts.ShowStats = Args.hasArg(OPT_print_stats);
905  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
906  Opts.ShowVersion = Args.hasArg(OPT_version);
907  Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
908
909  FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
910  if (const Arg *A = Args.getLastArg(OPT_x)) {
911    DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
912      .Case("c", FrontendOptions::IK_C)
913      .Case("cl", FrontendOptions::IK_OpenCL)
914      .Case("c", FrontendOptions::IK_C)
915      .Case("cl", FrontendOptions::IK_OpenCL)
916      .Case("c++", FrontendOptions::IK_CXX)
917      .Case("objective-c", FrontendOptions::IK_ObjC)
918      .Case("objective-c++", FrontendOptions::IK_ObjCXX)
919      .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
920      .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
921      .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
922      .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
923      .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
924      .Case("c-header", FrontendOptions::IK_C)
925      .Case("objective-c-header", FrontendOptions::IK_ObjC)
926      .Case("c++-header", FrontendOptions::IK_CXX)
927      .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
928      .Case("ast", FrontendOptions::IK_AST)
929      .Default(FrontendOptions::IK_None);
930    if (DashX == FrontendOptions::IK_None)
931      Diags.Report(diag::err_drv_invalid_value)
932        << A->getAsString(Args) << A->getValue(Args);
933  }
934
935  // '-' is the default input if none is given.
936  std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
937  Opts.Inputs.clear();
938  if (Inputs.empty())
939    Inputs.push_back("-");
940  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
941    FrontendOptions::InputKind IK = DashX;
942    if (IK == FrontendOptions::IK_None) {
943      IK = FrontendOptions::getInputKindForExtension(
944        llvm::StringRef(Inputs[i]).rsplit('.').second);
945      // FIXME: Remove this hack.
946      if (i == 0)
947        DashX = IK;
948    }
949    Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
950  }
951
952  return DashX;
953}
954
955std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
956                                                 void *MainAddr) {
957  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
958
959  if (!P.isEmpty()) {
960    P.eraseComponent();  // Remove /clang from foo/bin/clang
961    P.eraseComponent();  // Remove /bin   from foo/bin
962
963    // Get foo/lib/clang/<version>/include
964    P.appendComponent("lib");
965    P.appendComponent("clang");
966    P.appendComponent(CLANG_VERSION_STRING);
967  }
968
969  return P.str();
970}
971
972static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
973  using namespace cc1options;
974  Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
975  Opts.Verbose = Args.hasArg(OPT_v);
976  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
977  Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
978  Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
979
980  // Add -I... and -F... options in order.
981  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
982         ie = Args.filtered_end(); it != ie; ++it)
983    Opts.AddPath(it->getValue(Args), frontend::Angled, true,
984                 /*IsFramework=*/ it->getOption().matches(OPT_F));
985
986  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
987  llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
988  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
989                                             OPT_iwithprefixbefore),
990         ie = Args.filtered_end(); it != ie; ++it) {
991    if (it->getOption().matches(OPT_iprefix))
992      Prefix = it->getValue(Args);
993    else if (it->getOption().matches(OPT_iwithprefix))
994      Opts.AddPath(Prefix.str() + it->getValue(Args),
995                   frontend::System, false, false);
996    else
997      Opts.AddPath(Prefix.str() + it->getValue(Args),
998                   frontend::Angled, false, false);
999  }
1000
1001  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1002         ie = Args.filtered_end(); it != ie; ++it)
1003    Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1004  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1005         ie = Args.filtered_end(); it != ie; ++it)
1006    Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1007  for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1008         ie = Args.filtered_end(); it != ie; ++it)
1009    Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1010
1011  // FIXME: Need options for the various environment variables!
1012}
1013
1014static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1015                          FrontendOptions::InputKind IK,
1016                          Diagnostic &Diags) {
1017  // FIXME: Cleanup per-file based stuff.
1018
1019  // Set some properties which depend soley on the input kind; it would be nice
1020  // to move these to the language standard, and have the driver resolve the
1021  // input kind + language standard.
1022  if (IK == FrontendOptions::IK_Asm) {
1023    Opts.AsmPreprocessor = 1;
1024  } else if (IK == FrontendOptions::IK_ObjC ||
1025             IK == FrontendOptions::IK_ObjCXX ||
1026             IK == FrontendOptions::IK_PreprocessedObjC ||
1027             IK == FrontendOptions::IK_PreprocessedObjCXX) {
1028    Opts.ObjC1 = Opts.ObjC2 = 1;
1029  }
1030
1031  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1032  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1033    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1034#define LANGSTANDARD(id, name, desc, features) \
1035      .Case(name, LangStandard::lang_##id)
1036#include "clang/Frontend/LangStandards.def"
1037      .Default(LangStandard::lang_unspecified);
1038    if (LangStd == LangStandard::lang_unspecified)
1039      Diags.Report(diag::err_drv_invalid_value)
1040        << A->getAsString(Args) << A->getValue(Args);
1041  }
1042
1043  if (LangStd == LangStandard::lang_unspecified) {
1044    // Based on the base language, pick one.
1045    switch (IK) {
1046    case FrontendOptions::IK_None:
1047    case FrontendOptions::IK_AST:
1048      assert(0 && "Invalid input kind!");
1049    case FrontendOptions::IK_OpenCL:
1050      LangStd = LangStandard::lang_opencl;
1051      break;
1052    case FrontendOptions::IK_Asm:
1053    case FrontendOptions::IK_C:
1054    case FrontendOptions::IK_PreprocessedC:
1055    case FrontendOptions::IK_ObjC:
1056    case FrontendOptions::IK_PreprocessedObjC:
1057      LangStd = LangStandard::lang_gnu99;
1058      break;
1059    case FrontendOptions::IK_CXX:
1060    case FrontendOptions::IK_PreprocessedCXX:
1061    case FrontendOptions::IK_ObjCXX:
1062    case FrontendOptions::IK_PreprocessedObjCXX:
1063      LangStd = LangStandard::lang_gnucxx98;
1064      break;
1065    }
1066  }
1067
1068  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1069  Opts.BCPLComment = Std.hasBCPLComments();
1070  Opts.C99 = Std.isC99();
1071  Opts.CPlusPlus = Std.isCPlusPlus();
1072  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1073  Opts.Digraphs = Std.hasDigraphs();
1074  Opts.GNUMode = Std.isGNUMode();
1075  Opts.GNUInline = !Std.isC99();
1076  Opts.HexFloats = Std.hasHexFloats();
1077  Opts.ImplicitInt = Std.hasImplicitInt();
1078
1079  // OpenCL has some additional defaults.
1080  if (LangStd == LangStandard::lang_opencl) {
1081    Opts.OpenCL = 1;
1082    Opts.AltiVec = 1;
1083    Opts.CXXOperatorNames = 1;
1084    Opts.LaxVectorConversions = 1;
1085  }
1086
1087  // OpenCL and C++ both have bool, true, false keywords.
1088  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1089
1090  if (Opts.CPlusPlus)
1091    Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1092
1093  if (Args.hasArg(OPT_fobjc_gc_only))
1094    Opts.setGCMode(LangOptions::GCOnly);
1095  else if (Args.hasArg(OPT_fobjc_gc))
1096    Opts.setGCMode(LangOptions::HybridGC);
1097
1098  if (Args.hasArg(OPT_print_ivar_layout))
1099    Opts.ObjCGCBitmapPrint = 1;
1100
1101  if (Args.hasArg(OPT_faltivec))
1102    Opts.AltiVec = 1;
1103
1104  if (Args.hasArg(OPT_pthread))
1105    Opts.POSIXThreads = 1;
1106
1107  llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1108                                        "default");
1109  if (Vis == "default")
1110    Opts.setVisibilityMode(LangOptions::Default);
1111  else if (Vis == "hidden")
1112    Opts.setVisibilityMode(LangOptions::Hidden);
1113  else if (Vis == "protected")
1114    Opts.setVisibilityMode(LangOptions::Protected);
1115  else
1116    Diags.Report(diag::err_drv_invalid_value)
1117      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1118
1119  Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1120
1121  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1122  // is specified, or -std is set to a conforming mode.
1123  Opts.Trigraphs = !Opts.GNUMode;
1124  if (Args.hasArg(OPT_trigraphs))
1125    Opts.Trigraphs = 1;
1126
1127  Opts.DollarIdents = !Opts.AsmPreprocessor;
1128  if (Args.hasArg(OPT_fdollars_in_identifiers))
1129    Opts.DollarIdents = 1;
1130
1131  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1132  Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1133  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1134  if (Args.hasArg(OPT_fno_lax_vector_conversions))
1135      Opts.LaxVectorConversions = 0;
1136  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1137  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1138  Opts.Blocks = Args.hasArg(OPT_fblocks);
1139  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1140  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1141  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1142  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1143  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1144  Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1145  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1146  Opts.MathErrno = !Args.hasArg(OPT_fno_math_errno);
1147  Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1148                                               Diags);
1149  Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1150  Opts.ObjCConstantStringClass = getLastArgValue(Args,
1151                                                 OPT_fconstant_string_class);
1152  Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1153  Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1154  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1155  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1156  Opts.Static = Args.hasArg(OPT_static_define);
1157  Opts.OptimizeSize = 0;
1158
1159  // FIXME: Eliminate this dependency.
1160  unsigned Opt =
1161    Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1162  Opts.Optimize = Opt != 0;
1163
1164  // This is the __NO_INLINE__ define, which just depends on things like the
1165  // optimization level and -fno-inline, not actually whether the backend has
1166  // inlining enabled.
1167  //
1168  // FIXME: This is affected by other options (-fno-inline).
1169  Opts.NoInline = !Opt;
1170
1171  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1172  switch (SSP) {
1173  default:
1174    Diags.Report(diag::err_drv_invalid_value)
1175      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1176    break;
1177  case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1178  case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1179  case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1180  }
1181}
1182
1183static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1184                                  Diagnostic &Diags) {
1185  using namespace cc1options;
1186  Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1187  Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1188  if (const Arg *A = Args.getLastArg(OPT_token_cache))
1189      Opts.TokenCache = A->getValue(Args);
1190  else
1191    Opts.TokenCache = Opts.ImplicitPTHInclude;
1192  Opts.UsePredefines = !Args.hasArg(OPT_undef);
1193
1194  // Add macros from the command line.
1195  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1196         ie = Args.filtered_end(); it != ie; ++it) {
1197    if (it->getOption().matches(OPT_D))
1198      Opts.addMacroDef(it->getValue(Args));
1199    else
1200      Opts.addMacroUndef(it->getValue(Args));
1201  }
1202
1203  Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1204
1205  // Add the ordered list of -includes.
1206  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1207                                             OPT_include_pth),
1208         ie = Args.filtered_end(); it != ie; ++it) {
1209    // PCH is handled specially, we need to extra the original include path.
1210    if (it->getOption().matches(OPT_include_pch)) {
1211      std::string OriginalFile =
1212        PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1213      if (OriginalFile.empty())
1214        continue;
1215
1216      Opts.Includes.push_back(OriginalFile);
1217    } else
1218      Opts.Includes.push_back(it->getValue(Args));
1219  }
1220
1221  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1222         ie = Args.filtered_end(); it != ie; ++it) {
1223    std::pair<llvm::StringRef,llvm::StringRef> Split =
1224      llvm::StringRef(it->getValue(Args)).split(';');
1225
1226    if (Split.second.empty()) {
1227      Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1228      continue;
1229    }
1230
1231    Opts.addRemappedFile(Split.first, Split.second);
1232  }
1233}
1234
1235static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1236                                        ArgList &Args) {
1237  using namespace cc1options;
1238  Opts.ShowCPP = !Args.hasArg(OPT_dM);
1239  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1240  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1241  Opts.ShowComments = Args.hasArg(OPT_C);
1242  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1243}
1244
1245static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1246  using namespace cc1options;
1247  Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1248  Opts.CPU = getLastArgValue(Args, OPT_mcpu);
1249  Opts.Triple = getLastArgValue(Args, OPT_triple);
1250  Opts.Features = getAllArgValues(Args, OPT_target_feature);
1251
1252  // Use the host triple if unspecified.
1253  if (Opts.Triple.empty())
1254    Opts.Triple = llvm::sys::getHostTriple();
1255}
1256
1257//
1258
1259void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1260                                        const char **ArgBegin,
1261                                        const char **ArgEnd,
1262                                        Diagnostic &Diags) {
1263  // Parse the arguments.
1264  llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1265  unsigned MissingArgIndex, MissingArgCount;
1266  llvm::OwningPtr<InputArgList> Args(
1267    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1268
1269  // Check for missing argument error.
1270  if (MissingArgCount)
1271    Diags.Report(diag::err_drv_missing_argument)
1272      << Args->getArgString(MissingArgIndex) << MissingArgCount;
1273
1274  // Issue errors on unknown arguments.
1275  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1276         ie = Args->filtered_end(); it != ie; ++it)
1277    Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1278
1279  ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1280  ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1281  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1282  ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1283  FrontendOptions::InputKind DashX =
1284    ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1285  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1286  if (DashX != FrontendOptions::IK_AST)
1287    ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1288  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1289  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1290  ParseTargetArgs(Res.getTargetOpts(), *Args);
1291}
1292