CompilerInvocation.cpp revision 5ba49c0177bd594a9760956f51293b5731b03d6d 
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/Options.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"
31using namespace clang;
32
33//===----------------------------------------------------------------------===//
34// Initialization.
35//===----------------------------------------------------------------------===//
36
37CompilerInvocationBase::CompilerInvocationBase()
38  : LangOpts(new LangOptions()), TargetOpts(new TargetOptions()) {}
39
40CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
41  : RefCountedBase<CompilerInvocation>(),
42    LangOpts(new LangOptions(*X.getLangOpts())),
43    TargetOpts(new TargetOptions(X.getTargetOpts())) {}
44
45//===----------------------------------------------------------------------===//
46// Utility functions.
47//===----------------------------------------------------------------------===//
48
49static const char *getAnalysisStoreName(AnalysisStores Kind) {
50  switch (Kind) {
51  default:
52    llvm_unreachable("Unknown analysis store!");
53#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
54  case NAME##Model: return CMDFLAG;
55#include "clang/StaticAnalyzer/Core/Analyses.def"
56  }
57}
58
59static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
60  switch (Kind) {
61  default:
62    llvm_unreachable("Unknown analysis constraints!");
63#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
64  case NAME##Model: return CMDFLAG;
65#include "clang/StaticAnalyzer/Core/Analyses.def"
66  }
67}
68
69static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
70  switch (Kind) {
71  default:
72    llvm_unreachable("Unknown analysis client!");
73#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
74  case PD_##NAME: return CMDFLAG;
75#include "clang/StaticAnalyzer/Core/Analyses.def"
76  }
77}
78
79static const char *getAnalysisPurgeModeName(AnalysisPurgeMode Kind) {
80  switch (Kind) {
81  default:
82    llvm_unreachable("Unknown analysis purge mode!");
83#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
84  case NAME: return CMDFLAG;
85#include "clang/StaticAnalyzer/Core/Analyses.def"
86  }
87}
88
89static const char *getAnalysisIPAModeName(AnalysisIPAMode Kind) {
90  switch (Kind) {
91  default:
92    llvm_unreachable("Unknown analysis ipa mode!");
93#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
94  case NAME: return CMDFLAG;
95#include "clang/StaticAnalyzer/Core/Analyses.def"
96  }
97}
98
99static const char *
100  getAnalysisInliningModeName(AnalysisInliningMode Kind) {
101  switch (Kind) {
102  default:
103    llvm_unreachable("Unknown analysis inlining mode!");
104#define ANALYSIS_INLINE_SELECTION(NAME, CMDFLAG, DESC) \
105  case NAME: return CMDFLAG;
106#include "clang/StaticAnalyzer/Core/Analyses.def"
107  }
108}
109
110//===----------------------------------------------------------------------===//
111// Serialization (to args)
112//===----------------------------------------------------------------------===//
113
114namespace {
115  /// ToArgsList - Helper class to create a list of std::strings.
116  class ToArgsList {
117    std::vector<std::string> &Res;
118  public:
119    explicit ToArgsList(std::vector<std::string> &Res) : Res(Res) {}
120
121    void push_back(StringRef Str) {
122      // Avoid creating a temporary string.
123      Res.push_back(std::string());
124      Res.back().assign(Str.data(), Str.size());
125    }
126
127    void push_back(StringRef Str1, StringRef Str2) {
128      push_back(Str1);
129      push_back(Str2);
130    }
131  };
132}
133
134static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts, ToArgsList &Res) {
135  if (Opts.ShowCheckerHelp)
136    Res.push_back("-analyzer-checker-help");
137  if (Opts.AnalysisStoreOpt != RegionStoreModel)
138    Res.push_back("-analyzer-store",
139                  getAnalysisStoreName(Opts.AnalysisStoreOpt));
140  if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel)
141    Res.push_back("-analyzer-constraints",
142                  getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
143  if (Opts.AnalysisDiagOpt != PD_HTML)
144    Res.push_back("-analyzer-output",
145                  getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
146  if (Opts.AnalysisPurgeOpt != PurgeStmt)
147    Res.push_back("-analyzer-purge",
148                  getAnalysisPurgeModeName(Opts.AnalysisPurgeOpt));
149  if (!Opts.AnalyzeSpecificFunction.empty())
150    Res.push_back("-analyze-function", Opts.AnalyzeSpecificFunction);
151  if (Opts.IPAMode != DynamicDispatchBifurcate)
152    Res.push_back("-analyzer-ipa", getAnalysisIPAModeName(Opts.IPAMode));
153  if (Opts.InliningMode != NoRedundancy)
154    Res.push_back("-analyzer-inlining-mode",
155                  getAnalysisInliningModeName(Opts.InliningMode));
156
157  if (Opts.AnalyzeAll)
158    Res.push_back("-analyzer-opt-analyze-headers");
159  if (Opts.AnalyzerDisplayProgress)
160    Res.push_back("-analyzer-display-progress");
161  if (Opts.AnalyzeNestedBlocks)
162    Res.push_back("-analyzer-opt-analyze-nested-blocks");
163  if (Opts.eagerlyAssumeBinOpBifurcation)
164    Res.push_back("-analyzer-eagerly-assume");
165  if (Opts.TrimGraph)
166    Res.push_back("-trim-egraph");
167  if (Opts.visualizeExplodedGraphWithGraphViz)
168    Res.push_back("-analyzer-viz-egraph-graphviz");
169  if (Opts.visualizeExplodedGraphWithUbiGraph)
170    Res.push_back("-analyzer-viz-egraph-ubigraph");
171  if (Opts.NoRetryExhausted)
172    Res.push_back("-analyzer-disable-retry-exhausted");
173
174  for (unsigned i = 0, e = Opts.CheckersControlList.size(); i != e; ++i) {
175    const std::pair<std::string, bool> &opt = Opts.CheckersControlList[i];
176    if (opt.second)
177      Res.push_back("-analyzer-disable-checker");
178    else
179      Res.push_back("-analyzer-checker");
180    Res.push_back(opt.first);
181  }
182}
183
184static void CodeGenOptsToArgs(const CodeGenOptions &Opts, ToArgsList &Res) {
185  switch (Opts.DebugInfo) {
186    case CodeGenOptions::NoDebugInfo:
187      break;
188    case CodeGenOptions::DebugLineTablesOnly:
189      Res.push_back("-gline-tables-only");
190      break;
191    case CodeGenOptions::LimitedDebugInfo:
192      Res.push_back("-g");
193      Res.push_back("-flimit-debug-info");
194      break;
195    case CodeGenOptions::FullDebugInfo:
196      Res.push_back("-g");
197      Res.push_back("-fno-limit-debug-info");
198      break;
199  }
200  if (Opts.DisableLLVMOpts)
201    Res.push_back("-disable-llvm-optzns");
202  if (Opts.DisableRedZone)
203    Res.push_back("-disable-red-zone");
204  if (Opts.DisableTailCalls)
205    Res.push_back("-mdisable-tail-calls");
206  if (!Opts.DebugCompilationDir.empty())
207    Res.push_back("-fdebug-compilation-dir", Opts.DebugCompilationDir);
208  if (!Opts.DwarfDebugFlags.empty())
209    Res.push_back("-dwarf-debug-flags", Opts.DwarfDebugFlags);
210  if (Opts.EmitGcovArcs)
211    Res.push_back("-femit-coverage-data");
212  if (Opts.EmitGcovNotes)
213    Res.push_back("-femit-coverage-notes");
214  if (Opts.EmitOpenCLArgMetadata)
215    Res.push_back("-cl-kernel-arg-info");
216  if (!Opts.MergeAllConstants)
217    Res.push_back("-fno-merge-all-constants");
218  if (Opts.NoCommon)
219    Res.push_back("-fno-common");
220  if (Opts.ForbidGuardVariables)
221    Res.push_back("-fforbid-guard-variables");
222  if (Opts.UseRegisterSizedBitfieldAccess)
223    Res.push_back("-fuse-register-sized-bitfield-access");
224  if (Opts.NoImplicitFloat)
225    Res.push_back("-no-implicit-float");
226  if (Opts.OmitLeafFramePointer)
227    Res.push_back("-momit-leaf-frame-pointer");
228  if (Opts.OptimizeSize) {
229    assert(Opts.OptimizationLevel == 2 && "Invalid options!");
230    Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
231  } else if (Opts.OptimizationLevel != 0)
232    Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
233  if (!Opts.MainFileName.empty())
234    Res.push_back("-main-file-name", Opts.MainFileName);
235  if (Opts.NoInfsFPMath)
236    Res.push_back("-menable-no-infinities");
237  if (Opts.NoNaNsFPMath)
238    Res.push_back("-menable-no-nans");
239  // SimplifyLibCalls is only derived.
240  // TimePasses is only derived.
241  // UnitAtATime is unused.
242  // Inlining is only derived.
243
244  // UnrollLoops is derived, but also accepts an option, no
245  // harm in pushing it back here.
246  if (Opts.UnrollLoops)
247    Res.push_back("-funroll-loops");
248  if (Opts.DataSections)
249    Res.push_back("-fdata-sections");
250  if (Opts.FunctionSections)
251    Res.push_back("-ffunction-sections");
252  if (Opts.AsmVerbose)
253    Res.push_back("-masm-verbose");
254  if (!Opts.CodeModel.empty())
255    Res.push_back("-mcode-model", Opts.CodeModel);
256  if (Opts.CUDAIsDevice)
257    Res.push_back("-fcuda-is-device");
258  if (!Opts.CXAAtExit)
259    Res.push_back("-fno-use-cxa-atexit");
260  if (Opts.CXXCtorDtorAliases)
261    Res.push_back("-mconstructor-aliases");
262  if (Opts.ObjCAutoRefCountExceptions)
263    Res.push_back("-fobjc-arc-eh");
264  if (!Opts.DebugPass.empty()) {
265    Res.push_back("-mdebug-pass", Opts.DebugPass);
266  }
267  if (Opts.DisableFPElim)
268    Res.push_back("-mdisable-fp-elim");
269  if (!Opts.FloatABI.empty())
270    Res.push_back("-mfloat-abi", Opts.FloatABI);
271  if (!Opts.LimitFloatPrecision.empty())
272    Res.push_back("-mlimit-float-precision", Opts.LimitFloatPrecision);
273  if (Opts.NoZeroInitializedInBSS)
274    Res.push_back("-mno-zero-initialized-bss");
275  switch (Opts.getObjCDispatchMethod()) {
276  case CodeGenOptions::Legacy:
277    break;
278  case CodeGenOptions::Mixed:
279    Res.push_back("-fobjc-dispatch-method=mixed");
280    break;
281  case CodeGenOptions::NonLegacy:
282    Res.push_back("-fobjc-dispatch-method=non-legacy");
283    break;
284  }
285  if (Opts.BoundsChecking > 0)
286    Res.push_back("-fbounds-checking=" + llvm::utostr(Opts.BoundsChecking));
287  if (Opts.NumRegisterParameters)
288    Res.push_back("-mregparm", llvm::utostr(Opts.NumRegisterParameters));
289  if (Opts.NoGlobalMerge)
290    Res.push_back("-mno-global-merge");
291  if (Opts.NoExecStack)
292    Res.push_back("-mnoexecstack");
293  if (Opts.RelaxAll)
294    Res.push_back("-mrelax-all");
295  if (Opts.SaveTempLabels)
296    Res.push_back("-msave-temp-labels");
297  if (Opts.NoDwarf2CFIAsm)
298    Res.push_back("-fno-dwarf2-cfi-asm");
299  if (Opts.NoDwarfDirectoryAsm)
300    Res.push_back("-fno-dwarf-directory-asm");
301  if (Opts.SoftFloat)
302    Res.push_back("-msoft-float");
303  if (Opts.StrictEnums)
304    Res.push_back("-fstrict-enums");
305  if (Opts.UnwindTables)
306    Res.push_back("-munwind-tables");
307  if (Opts.RelocationModel != "pic")
308    Res.push_back("-mrelocation-model", Opts.RelocationModel);
309  if (!Opts.VerifyModule)
310    Res.push_back("-disable-llvm-verifier");
311  for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i)
312    Res.push_back("-backend-option", Opts.BackendOptions[i]);
313
314  switch (Opts.DefaultTLSModel) {
315  case CodeGenOptions::GeneralDynamicTLSModel:
316    break;
317  case CodeGenOptions::LocalDynamicTLSModel:
318    Res.push_back("-ftls-model=local-dynamic");
319    break;
320  case CodeGenOptions::InitialExecTLSModel:
321    Res.push_back("-ftls-model=initial-exec");
322    break;
323  case CodeGenOptions::LocalExecTLSModel:
324    Res.push_back("-ftls-model=local-exec");
325    break;
326  }
327}
328
329static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
330                                       ToArgsList &Res) {
331  if (Opts.IncludeSystemHeaders)
332    Res.push_back("-sys-header-deps");
333  if (Opts.ShowHeaderIncludes)
334    Res.push_back("-H");
335  if (!Opts.HeaderIncludeOutputFile.empty())
336    Res.push_back("-header-include-file", Opts.HeaderIncludeOutputFile);
337  if (Opts.UsePhonyTargets)
338    Res.push_back("-MP");
339  if (!Opts.OutputFile.empty())
340    Res.push_back("-dependency-file", Opts.OutputFile);
341  for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i)
342    Res.push_back("-MT", Opts.Targets[i]);
343}
344
345static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
346                                 ToArgsList &Res) {
347  if (Opts.IgnoreWarnings)
348    Res.push_back("-w");
349  if (Opts.NoRewriteMacros)
350    Res.push_back("-Wno-rewrite-macros");
351  if (Opts.Pedantic)
352    Res.push_back("-pedantic");
353  if (Opts.PedanticErrors)
354    Res.push_back("-pedantic-errors");
355  if (!Opts.ShowColumn)
356    Res.push_back("-fno-show-column");
357  if (!Opts.ShowLocation)
358    Res.push_back("-fno-show-source-location");
359  if (!Opts.ShowCarets)
360    Res.push_back("-fno-caret-diagnostics");
361  if (!Opts.ShowFixits)
362    Res.push_back("-fno-diagnostics-fixit-info");
363  if (Opts.ShowSourceRanges)
364    Res.push_back("-fdiagnostics-print-source-range-info");
365  if (Opts.ShowParseableFixits)
366    Res.push_back("-fdiagnostics-parseable-fixits");
367  if (Opts.ShowColors)
368    Res.push_back("-fcolor-diagnostics");
369  if (Opts.VerifyDiagnostics)
370    Res.push_back("-verify");
371  if (Opts.ShowOptionNames)
372    Res.push_back("-fdiagnostics-show-option");
373  if (Opts.ShowCategories == 1)
374    Res.push_back("-fdiagnostics-show-category=id");
375  else if (Opts.ShowCategories == 2)
376    Res.push_back("-fdiagnostics-show-category=name");
377  switch (Opts.Format) {
378  case DiagnosticOptions::Clang:
379    Res.push_back("-fdiagnostics-format=clang"); break;
380  case DiagnosticOptions::Msvc:
381    Res.push_back("-fdiagnostics-format=msvc");  break;
382  case DiagnosticOptions::Vi:
383    Res.push_back("-fdiagnostics-format=vi");    break;
384  }
385  if (Opts.ErrorLimit)
386    Res.push_back("-ferror-limit", llvm::utostr(Opts.ErrorLimit));
387  if (!Opts.DiagnosticLogFile.empty())
388    Res.push_back("-diagnostic-log-file", Opts.DiagnosticLogFile);
389  if (Opts.MacroBacktraceLimit
390                        != DiagnosticOptions::DefaultMacroBacktraceLimit)
391    Res.push_back("-fmacro-backtrace-limit",
392                  llvm::utostr(Opts.MacroBacktraceLimit));
393  if (Opts.TemplateBacktraceLimit
394                        != DiagnosticOptions::DefaultTemplateBacktraceLimit)
395    Res.push_back("-ftemplate-backtrace-limit",
396                  llvm::utostr(Opts.TemplateBacktraceLimit));
397  if (Opts.ConstexprBacktraceLimit
398                        != DiagnosticOptions::DefaultConstexprBacktraceLimit)
399    Res.push_back("-fconstexpr-backtrace-limit",
400                  llvm::utostr(Opts.ConstexprBacktraceLimit));
401
402  if (Opts.TabStop != DiagnosticOptions::DefaultTabStop)
403    Res.push_back("-ftabstop", llvm::utostr(Opts.TabStop));
404  if (Opts.MessageLength)
405    Res.push_back("-fmessage-length", llvm::utostr(Opts.MessageLength));
406  if (!Opts.DumpBuildInformation.empty())
407    Res.push_back("-dump-build-information", Opts.DumpBuildInformation);
408  for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
409    Res.push_back("-W" + Opts.Warnings[i]);
410}
411
412static const char *getInputKindName(InputKind Kind) {
413  switch (Kind) {
414  case IK_None:              break;
415  case IK_AST:               return "ast";
416  case IK_Asm:               return "assembler-with-cpp";
417  case IK_C:                 return "c";
418  case IK_CXX:               return "c++";
419  case IK_LLVM_IR:           return "ir";
420  case IK_ObjC:              return "objective-c";
421  case IK_ObjCXX:            return "objective-c++";
422  case IK_OpenCL:            return "cl";
423  case IK_CUDA:              return "cuda";
424  case IK_PreprocessedC:     return "cpp-output";
425  case IK_PreprocessedCXX:   return "c++-cpp-output";
426  case IK_PreprocessedObjC:  return "objective-c-cpp-output";
427  case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
428  }
429
430  llvm_unreachable("Unexpected language kind!");
431}
432
433static const char *getActionName(frontend::ActionKind Kind) {
434  switch (Kind) {
435  case frontend::PluginAction:
436    llvm_unreachable("Invalid kind!");
437
438  case frontend::ASTDeclList:            return "-ast-list";
439  case frontend::ASTDump:                return "-ast-dump";
440  case frontend::ASTDumpXML:             return "-ast-dump-xml";
441  case frontend::ASTPrint:               return "-ast-print";
442  case frontend::ASTView:                return "-ast-view";
443  case frontend::DumpRawTokens:          return "-dump-raw-tokens";
444  case frontend::DumpTokens:             return "-dump-tokens";
445  case frontend::EmitAssembly:           return "-S";
446  case frontend::EmitBC:                 return "-emit-llvm-bc";
447  case frontend::EmitHTML:               return "-emit-html";
448  case frontend::EmitLLVM:               return "-emit-llvm";
449  case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
450  case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
451  case frontend::EmitObj:                return "-emit-obj";
452  case frontend::FixIt:                  return "-fixit";
453  case frontend::GenerateModule:         return "-emit-module";
454  case frontend::GeneratePCH:            return "-emit-pch";
455  case frontend::GeneratePTH:            return "-emit-pth";
456  case frontend::InitOnly:               return "-init-only";
457  case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
458  case frontend::PrintDeclContext:       return "-print-decl-contexts";
459  case frontend::PrintPreamble:          return "-print-preamble";
460  case frontend::PrintPreprocessedInput: return "-E";
461  case frontend::RewriteMacros:          return "-rewrite-macros";
462  case frontend::RewriteObjC:            return "-rewrite-objc";
463  case frontend::RewriteTest:            return "-rewrite-test";
464  case frontend::RunAnalysis:            return "-analyze";
465  case frontend::MigrateSource:          return "-migrate";
466  case frontend::RunPreprocessorOnly:    return "-Eonly";
467  }
468
469  llvm_unreachable("Unexpected language kind!");
470}
471
472static void FileSystemOptsToArgs(const FileSystemOptions &Opts, ToArgsList &Res){
473  if (!Opts.WorkingDir.empty())
474    Res.push_back("-working-directory", Opts.WorkingDir);
475}
476
477static void CodeCompleteOptionsToArgs(const CodeCompleteOptions &Opts,
478                                      ToArgsList &Res) {
479  if (Opts.IncludeMacros)
480    Res.push_back("-code-completion-macros");
481  if (Opts.IncludeCodePatterns)
482    Res.push_back("-code-completion-patterns");
483  if (!Opts.IncludeGlobals)
484    Res.push_back("-no-code-completion-globals");
485  if (Opts.IncludeBriefComments)
486    Res.push_back("-code-completion-brief-comments");
487}
488
489static void FrontendOptsToArgs(const FrontendOptions &Opts, ToArgsList &Res) {
490  if (Opts.DisableFree)
491    Res.push_back("-disable-free");
492  if (Opts.RelocatablePCH)
493    Res.push_back("-relocatable-pch");
494  if (Opts.ShowHelp)
495    Res.push_back("-help");
496  if (Opts.ShowStats)
497    Res.push_back("-print-stats");
498  if (Opts.ShowTimers)
499    Res.push_back("-ftime-report");
500  if (Opts.ShowVersion)
501    Res.push_back("-version");
502  if (Opts.FixWhatYouCan)
503    Res.push_back("-fix-what-you-can");
504  if (Opts.FixOnlyWarnings)
505    Res.push_back("-fix-only-warnings");
506  if (Opts.FixAndRecompile)
507    Res.push_back("-fixit-recompile");
508  if (Opts.FixToTemporaries)
509    Res.push_back("-fixit-to-temporary");
510  switch (Opts.ARCMTAction) {
511  case FrontendOptions::ARCMT_None:
512    break;
513  case FrontendOptions::ARCMT_Check:
514    Res.push_back("-arcmt-check");
515    break;
516  case FrontendOptions::ARCMT_Modify:
517    Res.push_back("-arcmt-modify");
518    break;
519  case FrontendOptions::ARCMT_Migrate:
520    Res.push_back("-arcmt-migrate");
521    break;
522  }
523  CodeCompleteOptionsToArgs(Opts.CodeCompleteOpts, Res);
524  if (!Opts.MTMigrateDir.empty())
525    Res.push_back("-mt-migrate-directory", Opts.MTMigrateDir);
526  if (!Opts.ARCMTMigrateReportOut.empty())
527    Res.push_back("-arcmt-migrate-report-output", Opts.ARCMTMigrateReportOut);
528  if (Opts.ARCMTMigrateEmitARCErrors)
529    Res.push_back("-arcmt-migrate-emit-errors");
530
531  if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals)
532    Res.push_back("-objcmt-migrate-literals");
533  if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting)
534    Res.push_back("-objcmt-migrate-subscripting");
535
536  bool NeedLang = false;
537  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
538    if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
539        Opts.Inputs[i].Kind)
540      NeedLang = true;
541  if (NeedLang)
542    Res.push_back("-x", getInputKindName(Opts.Inputs[0].Kind));
543  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
544    assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
545           "Unable to represent this input vector!");
546    Res.push_back(Opts.Inputs[i].File);
547  }
548
549  if (!Opts.OutputFile.empty())
550    Res.push_back("-o", Opts.OutputFile);
551  if (!Opts.CodeCompletionAt.FileName.empty())
552    Res.push_back("-code-completion-at",
553                  Opts.CodeCompletionAt.FileName + ":" +
554                  llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
555                  llvm::utostr(Opts.CodeCompletionAt.Column));
556  if (Opts.ProgramAction != frontend::PluginAction)
557    Res.push_back(getActionName(Opts.ProgramAction));
558  if (!Opts.ActionName.empty()) {
559    Res.push_back("-plugin", Opts.ActionName);
560    for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i)
561      Res.push_back("-plugin-arg-" + Opts.ActionName, Opts.PluginArgs[i]);
562  }
563  if (!Opts.ASTDumpFilter.empty())
564    Res.push_back("-ast-dump-filter", Opts.ASTDumpFilter);
565  for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i)
566    Res.push_back("-load", Opts.Plugins[i]);
567  for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
568    Res.push_back("-add-plugin", Opts.AddPluginActions[i]);
569    for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai)
570      Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i],
571                    Opts.AddPluginArgs[i][ai]);
572  }
573  for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i)
574    Res.push_back("-ast-merge", Opts.ASTMergeFiles[i]);
575  for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i)
576    Res.push_back("-mllvm", Opts.LLVMArgs[i]);
577  if (!Opts.OverrideRecordLayoutsFile.empty())
578    Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
579}
580
581static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
582                                   ToArgsList &Res) {
583  if (Opts.Sysroot != "/") {
584    Res.push_back("-isysroot");
585    Res.push_back(Opts.Sysroot);
586  }
587
588  /// User specified include entries.
589  for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
590    const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
591    if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
592      llvm::report_fatal_error("Invalid option set!");
593    if (E.IsUserSupplied) {
594      switch (E.Group) {
595      case frontend::After:
596        Res.push_back("-idirafter");
597        break;
598
599      case frontend::Quoted:
600        Res.push_back("-iquote");
601        break;
602
603      case frontend::System:
604        Res.push_back("-isystem");
605        break;
606
607      case frontend::IndexHeaderMap:
608        Res.push_back("-index-header-map");
609        Res.push_back(E.IsFramework? "-F" : "-I");
610        break;
611
612      case frontend::CSystem:
613        Res.push_back("-c-isystem");
614        break;
615
616      case frontend::CXXSystem:
617        Res.push_back("-cxx-isystem");
618        break;
619
620      case frontend::ObjCSystem:
621        Res.push_back("-objc-isystem");
622        break;
623
624      case frontend::ObjCXXSystem:
625        Res.push_back("-objcxx-isystem");
626        break;
627
628      case frontend::Angled:
629        Res.push_back(E.IsFramework ? "-F" : "-I");
630        break;
631      }
632    } else {
633      if (E.IsInternal) {
634        assert(E.Group == frontend::System && "Unexpected header search group");
635        if (E.ImplicitExternC)
636          Res.push_back("-internal-externc-isystem");
637        else
638          Res.push_back("-internal-isystem");
639      } else {
640        if (E.Group != frontend::Angled && E.Group != frontend::System)
641          llvm::report_fatal_error("Invalid option set!");
642        Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
643                      "-iwithprefix");
644      }
645    }
646    Res.push_back(E.Path);
647  }
648
649  /// User-specified system header prefixes.
650  for (unsigned i = 0, e = Opts.SystemHeaderPrefixes.size(); i != e; ++i) {
651    if (Opts.SystemHeaderPrefixes[i].IsSystemHeader)
652      Res.push_back("-isystem-prefix");
653    else
654      Res.push_back("-ino-system-prefix");
655
656    Res.push_back(Opts.SystemHeaderPrefixes[i].Prefix);
657  }
658
659  if (!Opts.ResourceDir.empty())
660    Res.push_back("-resource-dir", Opts.ResourceDir);
661  if (!Opts.ModuleCachePath.empty())
662    Res.push_back("-fmodule-cache-path", Opts.ModuleCachePath);
663  if (!Opts.UseStandardSystemIncludes)
664    Res.push_back("-nostdsysteminc");
665  if (!Opts.UseStandardCXXIncludes)
666    Res.push_back("-nostdinc++");
667  if (Opts.UseLibcxx)
668    Res.push_back("-stdlib=libc++");
669  if (Opts.Verbose)
670    Res.push_back("-v");
671}
672
673static void LangOptsToArgs(const LangOptions &Opts, ToArgsList &Res) {
674  LangOptions DefaultLangOpts;
675
676  // FIXME: Need to set -std to get all the implicit options.
677
678  // FIXME: We want to only pass options relative to the defaults, which
679  // requires constructing a target. :(
680  //
681  // It would be better to push the all target specific choices into the driver,
682  // so that everything below that was more uniform.
683
684  if (Opts.Trigraphs)
685    Res.push_back("-trigraphs");
686  // Implicit based on the input kind:
687  //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
688  // Implicit based on the input language standard:
689  //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
690  if (Opts.DollarIdents)
691    Res.push_back("-fdollars-in-identifiers");
692  if (Opts.GNUMode && !Opts.GNUKeywords)
693    Res.push_back("-fno-gnu-keywords");
694  if (!Opts.GNUMode && Opts.GNUKeywords)
695    Res.push_back("-fgnu-keywords");
696  if (Opts.MicrosoftExt)
697    Res.push_back("-fms-extensions");
698  if (Opts.MicrosoftMode)
699    Res.push_back("-fms-compatibility");
700  if (Opts.MSCVersion != 0)
701    Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
702  if (Opts.Borland)
703    Res.push_back("-fborland-extensions");
704  if (Opts.ObjCDefaultSynthProperties)
705    Res.push_back("-fobjc-default-synthesize-properties");
706  // NoInline is implicit.
707  if (!Opts.CXXOperatorNames)
708    Res.push_back("-fno-operator-names");
709  if (Opts.PascalStrings)
710    Res.push_back("-fpascal-strings");
711  if (Opts.CatchUndefined)
712    Res.push_back("-fcatch-undefined-behavior");
713  if (Opts.AddressSanitizer)
714    Res.push_back("-faddress-sanitizer");
715  if (Opts.ThreadSanitizer)
716    Res.push_back("-fthread-sanitizer");
717  if (Opts.WritableStrings)
718    Res.push_back("-fwritable-strings");
719  if (Opts.ConstStrings)
720    Res.push_back("-fconst-strings");
721  if (!Opts.LaxVectorConversions)
722    Res.push_back("-fno-lax-vector-conversions");
723  if (Opts.AltiVec)
724    Res.push_back("-faltivec");
725  if (Opts.Exceptions)
726    Res.push_back("-fexceptions");
727  if (Opts.ObjCExceptions)
728    Res.push_back("-fobjc-exceptions");
729  if (Opts.CXXExceptions)
730    Res.push_back("-fcxx-exceptions");
731  if (Opts.SjLjExceptions)
732    Res.push_back("-fsjlj-exceptions");
733  if (Opts.TraditionalCPP)
734    Res.push_back("-traditional-cpp");
735  if (!Opts.RTTI)
736    Res.push_back("-fno-rtti");
737  if (Opts.MSBitfields)
738    Res.push_back("-mms-bitfields");
739  if (Opts.Freestanding)
740    Res.push_back("-ffreestanding");
741  if (Opts.NoBuiltin)
742    Res.push_back("-fno-builtin");
743  if (!Opts.AssumeSaneOperatorNew)
744    Res.push_back("-fno-assume-sane-operator-new");
745  if (!Opts.ThreadsafeStatics)
746    Res.push_back("-fno-threadsafe-statics");
747  if (Opts.POSIXThreads)
748    Res.push_back("-pthread");
749  if (Opts.Blocks)
750    Res.push_back("-fblocks");
751  if (Opts.BlocksRuntimeOptional)
752    Res.push_back("-fblocks-runtime-optional");
753  if (Opts.Modules)
754    Res.push_back("-fmodules");
755  if (Opts.EmitAllDecls)
756    Res.push_back("-femit-all-decls");
757  if (Opts.MathErrno)
758    Res.push_back("-fmath-errno");
759  switch (Opts.getSignedOverflowBehavior()) {
760  case LangOptions::SOB_Undefined: break;
761  case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
762  case LangOptions::SOB_Trapping:
763    Res.push_back("-ftrapv");
764    if (!Opts.OverflowHandler.empty())
765      Res.push_back("-ftrapv-handler", Opts.OverflowHandler);
766    break;
767  }
768  switch (Opts.getFPContractMode()) {
769  case LangOptions::FPC_Off:  Res.push_back("-ffp-contract=off"); break;
770  case LangOptions::FPC_On:   Res.push_back("-ffp-contract=on"); break;
771  case LangOptions::FPC_Fast: Res.push_back("-ffp-contract=fast"); break;
772  }
773  if (Opts.HeinousExtensions)
774    Res.push_back("-fheinous-gnu-extensions");
775  // Optimize is implicit.
776  // OptimizeSize is implicit.
777  if (Opts.FastMath)
778    Res.push_back("-ffast-math");
779  if (Opts.Static)
780    Res.push_back("-static-define");
781  if (Opts.DumpRecordLayoutsSimple)
782    Res.push_back("-fdump-record-layouts-simple");
783  else if (Opts.DumpRecordLayouts)
784    Res.push_back("-fdump-record-layouts");
785  if (Opts.DumpVTableLayouts)
786    Res.push_back("-fdump-vtable-layouts");
787  if (Opts.NoBitFieldTypeAlign)
788    Res.push_back("-fno-bitfield-type-alignment");
789  if (Opts.PICLevel)
790    Res.push_back("-pic-level", llvm::utostr(Opts.PICLevel));
791  if (Opts.PIELevel)
792    Res.push_back("-pie-level", llvm::utostr(Opts.PIELevel));
793  if (Opts.ObjCGCBitmapPrint)
794    Res.push_back("-print-ivar-layout");
795  if (Opts.NoConstantCFStrings)
796    Res.push_back("-fno-constant-cfstrings");
797  if (!Opts.AccessControl)
798    Res.push_back("-fno-access-control");
799  if (!Opts.CharIsSigned)
800    Res.push_back("-fno-signed-char");
801  if (Opts.CPlusPlus && !Opts.WChar)
802    Res.push_back("-fno-wchar");
803  if (Opts.ShortWChar)
804    Res.push_back("-fshort-wchar");
805  if (!Opts.ElideConstructors)
806    Res.push_back("-fno-elide-constructors");
807  if (Opts.getGC() != LangOptions::NonGC) {
808    if (Opts.getGC() == LangOptions::HybridGC) {
809      Res.push_back("-fobjc-gc");
810    } else {
811      assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
812      Res.push_back("-fobjc-gc-only");
813    }
814  }
815  Res.push_back("-fobjc-runtime=" + Opts.ObjCRuntime.getAsString());
816  if (Opts.ObjCAutoRefCount)
817    Res.push_back("-fobjc-arc");
818  if (Opts.ObjCARCWeak)
819    Res.push_back("-fobjc-runtime-has-weak");
820  if (!Opts.ObjCInferRelatedResultType)
821    Res.push_back("-fno-objc-infer-related-result-type");
822
823  if (Opts.AppleKext)
824    Res.push_back("-fapple-kext");
825
826  if (Opts.getVisibilityMode() != DefaultVisibility) {
827    Res.push_back("-fvisibility");
828    if (Opts.getVisibilityMode() == HiddenVisibility) {
829      Res.push_back("hidden");
830    } else {
831      assert(Opts.getVisibilityMode() == ProtectedVisibility &&
832             "Invalid visibility!");
833      Res.push_back("protected");
834    }
835  }
836  if (Opts.InlineVisibilityHidden)
837    Res.push_back("-fvisibility-inlines-hidden");
838
839  if (Opts.getStackProtector() != 0)
840    Res.push_back("-stack-protector", llvm::utostr(Opts.getStackProtector()));
841  if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth)
842    Res.push_back("-ftemplate-depth", llvm::utostr(Opts.InstantiationDepth));
843  if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth)
844    Res.push_back("-fconstexpr-depth", llvm::utostr(Opts.ConstexprCallDepth));
845  if (!Opts.ObjCConstantStringClass.empty())
846    Res.push_back("-fconstant-string-class", Opts.ObjCConstantStringClass);
847  if (Opts.FakeAddressSpaceMap)
848    Res.push_back("-ffake-address-space-map");
849  if (Opts.ParseUnknownAnytype)
850    Res.push_back("-funknown-anytype");
851  if (Opts.DebuggerSupport)
852    Res.push_back("-fdebugger-support");
853  if (Opts.DebuggerCastResultToId)
854    Res.push_back("-fdebugger-cast-result-to-id");
855  if (Opts.DebuggerObjCLiteral)
856    Res.push_back("-fdebugger-objc-literal");
857  if (Opts.DelayedTemplateParsing)
858    Res.push_back("-fdelayed-template-parsing");
859  if (Opts.Deprecated)
860    Res.push_back("-fdeprecated-macro");
861  if (Opts.ApplePragmaPack)
862    Res.push_back("-fapple-pragma-pack");
863  if (!Opts.CurrentModule.empty())
864    Res.push_back("-fmodule-name=" + Opts.CurrentModule);
865}
866
867static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
868                                   ToArgsList &Res) {
869  for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
870    Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
871                  Opts.Macros[i].first);
872  for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
873    // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
874    Res.push_back("-include", Opts.Includes[i]);
875  }
876  for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i)
877    Res.push_back("-imacros", Opts.MacroIncludes[i]);
878  if (!Opts.UsePredefines)
879    Res.push_back("-undef");
880  if (Opts.DetailedRecord)
881    Res.push_back("-detailed-preprocessing-record");
882  if (!Opts.ImplicitPCHInclude.empty())
883    Res.push_back("-include-pch", Opts.ImplicitPCHInclude);
884  if (!Opts.ImplicitPTHInclude.empty())
885    Res.push_back("-include-pth", Opts.ImplicitPTHInclude);
886  if (!Opts.TokenCache.empty()) {
887    if (Opts.ImplicitPTHInclude.empty())
888      Res.push_back("-token-cache", Opts.TokenCache);
889    else
890      assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
891             "Unsupported option combination!");
892  }
893  for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i)
894    Res.push_back("-chain-include", Opts.ChainedIncludes[i]);
895  for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
896    Res.push_back("-remap-file", Opts.RemappedFiles[i].first + ";" +
897                                 Opts.RemappedFiles[i].second);
898  }
899}
900
901static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
902                                         ToArgsList &Res) {
903  if (!Opts.ShowCPP && !Opts.ShowMacros)
904    llvm::report_fatal_error("Invalid option combination!");
905
906  if (Opts.ShowCPP && Opts.ShowMacros)
907    Res.push_back("-dD");
908  else if (!Opts.ShowCPP && Opts.ShowMacros)
909    Res.push_back("-dM");
910
911  if (!Opts.ShowLineMarkers)
912    Res.push_back("-P");
913  if (Opts.ShowComments)
914    Res.push_back("-C");
915  if (Opts.ShowMacroComments)
916    Res.push_back("-CC");
917}
918
919static void TargetOptsToArgs(const TargetOptions &Opts,
920                             ToArgsList &Res) {
921  Res.push_back("-triple");
922  Res.push_back(Opts.Triple);
923  if (!Opts.CPU.empty())
924    Res.push_back("-target-cpu", Opts.CPU);
925  if (!Opts.ABI.empty())
926    Res.push_back("-target-abi", Opts.ABI);
927  if (!Opts.LinkerVersion.empty())
928    Res.push_back("-target-linker-version", Opts.LinkerVersion);
929  if (!Opts.CXXABI.empty())
930    Res.push_back("-cxx-abi", Opts.CXXABI);
931  for (unsigned i = 0, e = Opts.FeaturesAsWritten.size(); i != e; ++i)
932    Res.push_back("-target-feature", Opts.FeaturesAsWritten[i]);
933}
934
935void CompilerInvocation::toArgs(std::vector<std::string> &Res) const {
936  ToArgsList List(Res);
937  AnalyzerOptsToArgs(*getAnalyzerOpts(), List);
938  CodeGenOptsToArgs(getCodeGenOpts(), List);
939  DependencyOutputOptsToArgs(getDependencyOutputOpts(), List);
940  DiagnosticOptsToArgs(getDiagnosticOpts(), List);
941  FileSystemOptsToArgs(getFileSystemOpts(), List);
942  FrontendOptsToArgs(getFrontendOpts(), List);
943  HeaderSearchOptsToArgs(getHeaderSearchOpts(), List);
944  LangOptsToArgs(*getLangOpts(), List);
945  PreprocessorOptsToArgs(getPreprocessorOpts(), List);
946  PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), List);
947  TargetOptsToArgs(getTargetOpts(), List);
948}
949
950//===----------------------------------------------------------------------===//
951// Deserialization (to args)
952//===----------------------------------------------------------------------===//
953
954using namespace clang::driver;
955using namespace clang::driver::options;
956
957//
958
959static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
960                                     DiagnosticsEngine &Diags) {
961  unsigned DefaultOpt = 0;
962  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
963    DefaultOpt = 2;
964
965  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
966    if (A->getOption().matches(options::OPT_O0))
967      return 0;
968
969    assert (A->getOption().matches(options::OPT_O));
970
971    llvm::StringRef S(A->getValue(Args));
972    if (S == "s" || S == "z" || S.empty())
973      return 2;
974
975    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
976  }
977
978  return DefaultOpt;
979}
980
981static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
982                                         DiagnosticsEngine &Diags) {
983  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
984    if (A->getOption().matches(options::OPT_O)) {
985      switch (A->getValue(Args)[0]) {
986      default:
987        return 0;
988      case 's':
989        return 1;
990      case 'z':
991        return 2;
992      }
993    }
994  }
995  return 0;
996}
997
998static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
999  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
1000         E = Args.filtered_end(); I != E; ++I) {
1001    Arg *A = *I;
1002    // If the argument is a pure flag, add its name (minus the "-W" at the beginning)
1003    // to the warning list. Else, add its value (for the OPT_W case).
1004    if (A->getOption().getKind() == Option::FlagClass) {
1005      Warnings.push_back(A->getOption().getName().substr(2));
1006    } else {
1007      for (unsigned Idx = 0, End = A->getNumValues();
1008           Idx < End; ++Idx) {
1009        StringRef V = A->getValue(Args, Idx);
1010        // "-Wl," and such are not warning options.
1011        // FIXME: Should be handled by putting these in separate flags.
1012        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
1013          continue;
1014
1015        Warnings.push_back(V);
1016      }
1017    }
1018  }
1019}
1020
1021static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
1022                              DiagnosticsEngine &Diags) {
1023  using namespace options;
1024  bool Success = true;
1025  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
1026    StringRef Name = A->getValue(Args);
1027    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
1028#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
1029      .Case(CMDFLAG, NAME##Model)
1030#include "clang/StaticAnalyzer/Core/Analyses.def"
1031      .Default(NumStores);
1032    if (Value == NumStores) {
1033      Diags.Report(diag::err_drv_invalid_value)
1034        << A->getAsString(Args) << Name;
1035      Success = false;
1036    } else {
1037      Opts.AnalysisStoreOpt = Value;
1038    }
1039  }
1040
1041  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
1042    StringRef Name = A->getValue(Args);
1043    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
1044#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
1045      .Case(CMDFLAG, NAME##Model)
1046#include "clang/StaticAnalyzer/Core/Analyses.def"
1047      .Default(NumConstraints);
1048    if (Value == NumConstraints) {
1049      Diags.Report(diag::err_drv_invalid_value)
1050        << A->getAsString(Args) << Name;
1051      Success = false;
1052    } else {
1053      Opts.AnalysisConstraintsOpt = Value;
1054    }
1055  }
1056
1057  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1058    StringRef Name = A->getValue(Args);
1059    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1060#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1061      .Case(CMDFLAG, PD_##NAME)
1062#include "clang/StaticAnalyzer/Core/Analyses.def"
1063      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1064    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1065      Diags.Report(diag::err_drv_invalid_value)
1066        << A->getAsString(Args) << Name;
1067      Success = false;
1068    } else {
1069      Opts.AnalysisDiagOpt = Value;
1070    }
1071  }
1072
1073  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1074    StringRef Name = A->getValue(Args);
1075    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1076#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1077      .Case(CMDFLAG, NAME)
1078#include "clang/StaticAnalyzer/Core/Analyses.def"
1079      .Default(NumPurgeModes);
1080    if (Value == NumPurgeModes) {
1081      Diags.Report(diag::err_drv_invalid_value)
1082        << A->getAsString(Args) << Name;
1083      Success = false;
1084    } else {
1085      Opts.AnalysisPurgeOpt = Value;
1086    }
1087  }
1088
1089  if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
1090    StringRef Name = A->getValue(Args);
1091    AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
1092#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
1093      .Case(CMDFLAG, NAME)
1094#include "clang/StaticAnalyzer/Core/Analyses.def"
1095      .Default(NumIPAModes);
1096    if (Value == NumIPAModes) {
1097      Diags.Report(diag::err_drv_invalid_value)
1098        << A->getAsString(Args) << Name;
1099      Success = false;
1100    } else {
1101      Opts.IPAMode = Value;
1102    }
1103  }
1104
1105  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
1106    StringRef Name = A->getValue(Args);
1107    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
1108#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
1109      .Case(CMDFLAG, NAME)
1110#include "clang/StaticAnalyzer/Core/Analyses.def"
1111      .Default(NumInliningModes);
1112    if (Value == NumInliningModes) {
1113      Diags.Report(diag::err_drv_invalid_value)
1114        << A->getAsString(Args) << Name;
1115      Success = false;
1116    } else {
1117      Opts.InliningMode = Value;
1118    }
1119  }
1120
1121  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1122  Opts.visualizeExplodedGraphWithGraphViz =
1123    Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1124  Opts.visualizeExplodedGraphWithUbiGraph =
1125    Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1126  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
1127  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1128  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1129  Opts.AnalyzeNestedBlocks =
1130    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1131  Opts.eagerlyAssumeBinOpBifurcation = Args.hasArg(OPT_analyzer_eagerly_assume);
1132  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1133  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1134  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1135  Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1136  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1137  Opts.eagerlyTrimExplodedGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1138  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1139  Opts.InlineMaxStackDepth =
1140    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1141                            Opts.InlineMaxStackDepth, Diags);
1142  Opts.InlineMaxFunctionSize =
1143    Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1144                            Opts.InlineMaxFunctionSize, Diags);
1145
1146  Opts.CheckersControlList.clear();
1147  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1148                                             OPT_analyzer_disable_checker),
1149         ie = Args.filtered_end(); it != ie; ++it) {
1150    const Arg *A = *it;
1151    A->claim();
1152    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1153    // We can have a list of comma separated checker names, e.g:
1154    // '-analyzer-checker=cocoa,unix'
1155    StringRef checkerList = A->getValue(Args);
1156    SmallVector<StringRef, 4> checkers;
1157    checkerList.split(checkers, ",");
1158    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1159      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1160  }
1161
1162  // Go through the analyzer configuration options.
1163  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
1164       ie = Args.filtered_end(); it != ie; ++it) {
1165    const Arg *A = *it;
1166    A->claim();
1167    // We can have a list of comma separated config names, e.g:
1168    // '-analyzer-config key1=val1,key2=val2'
1169    StringRef configList = A->getValue(Args);
1170    SmallVector<StringRef, 4> configVals;
1171    configList.split(configVals, ",");
1172    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
1173      StringRef key, val;
1174      llvm::tie(key, val) = configVals[i].split("=");
1175      if (val.empty()) {
1176        Diags.Report(SourceLocation(),
1177                     diag::err_analyzer_config_no_value) << configVals[i];
1178        Success = false;
1179        break;
1180      }
1181      if (val.find('=') != StringRef::npos) {
1182        Diags.Report(SourceLocation(),
1183                     diag::err_analyzer_config_multiple_values)
1184          << configVals[i];
1185        Success = false;
1186        break;
1187      }
1188      Opts.Config[key] = val;
1189    }
1190  }
1191
1192  return Success;
1193}
1194
1195static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1196  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1197  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1198  return true;
1199}
1200
1201static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1202                             DiagnosticsEngine &Diags) {
1203  using namespace options;
1204  bool Success = true;
1205
1206  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1207  if (OptLevel > 3) {
1208    Diags.Report(diag::err_drv_invalid_value)
1209      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1210    OptLevel = 3;
1211    Success = false;
1212  }
1213  Opts.OptimizationLevel = OptLevel;
1214
1215  // We must always run at least the always inlining pass.
1216  Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1217    : CodeGenOptions::OnlyAlwaysInlining;
1218  // -fno-inline-functions overrides OptimizationLevel > 1.
1219  Opts.NoInline = Args.hasArg(OPT_fno_inline);
1220  Opts.Inlining = Args.hasArg(OPT_fno_inline_functions) ?
1221    CodeGenOptions::OnlyAlwaysInlining : Opts.Inlining;
1222
1223  if (Args.hasArg(OPT_gline_tables_only)) {
1224    Opts.DebugInfo = CodeGenOptions::DebugLineTablesOnly;
1225  } else if (Args.hasArg(OPT_g_Flag)) {
1226    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
1227      Opts.DebugInfo = CodeGenOptions::LimitedDebugInfo;
1228    else
1229      Opts.DebugInfo = CodeGenOptions::FullDebugInfo;
1230  }
1231
1232  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1233  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1234  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1235  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1236    OPT_fuse_register_sized_bitfield_access);
1237  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1238  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1239  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1240  Opts.NoCommon = Args.hasArg(OPT_fno_common);
1241  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1242  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
1243  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1244                            Args.hasArg(OPT_ffreestanding));
1245  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1246                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1247
1248  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1249  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1250  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1251  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1252  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1253  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1254  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1255  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1256  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1257  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1258  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1259  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1260  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1261  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1262                       Args.hasArg(OPT_cl_finite_math_only)||
1263                       Args.hasArg(OPT_cl_fast_relaxed_math));
1264  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1265                       Args.hasArg(OPT_cl_finite_math_only)||
1266                       Args.hasArg(OPT_cl_fast_relaxed_math));
1267  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1268  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1269  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1270  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1271  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1272  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1273  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1274  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1275  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1276  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1277  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1278  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
1279  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1280                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1281                      Args.hasArg(OPT_cl_fast_relaxed_math);
1282  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1283  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1284  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1285  Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
1286                                                Diags);
1287  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
1288
1289  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1290  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1291
1292  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1293  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1294
1295  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1296  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1297  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1298  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1299  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
1300  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1301  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1302  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1303  Opts.SSPBufferSize =
1304    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
1305  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1306  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1307    StringRef Val = A->getValue(Args);
1308    Val.getAsInteger(10, Opts.StackAlignment);
1309  }
1310
1311  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1312    StringRef Name = A->getValue(Args);
1313    unsigned Method = llvm::StringSwitch<unsigned>(Name)
1314      .Case("legacy", CodeGenOptions::Legacy)
1315      .Case("non-legacy", CodeGenOptions::NonLegacy)
1316      .Case("mixed", CodeGenOptions::Mixed)
1317      .Default(~0U);
1318    if (Method == ~0U) {
1319      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1320      Success = false;
1321    } else {
1322      Opts.ObjCDispatchMethod = Method;
1323    }
1324  }
1325
1326  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1327    StringRef Name = A->getValue(Args);
1328    unsigned Model = llvm::StringSwitch<unsigned>(Name)
1329        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1330        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1331        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1332        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1333        .Default(~0U);
1334    if (Model == ~0U) {
1335      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1336      Success = false;
1337    } else {
1338      Opts.DefaultTLSModel = static_cast<CodeGenOptions::TLSModel>(Model);
1339    }
1340  }
1341
1342  return Success;
1343}
1344
1345static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1346                                      ArgList &Args) {
1347  using namespace options;
1348  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1349  Opts.Targets = Args.getAllArgValues(OPT_MT);
1350  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1351  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1352  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1353  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1354  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1355  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1356}
1357
1358bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1359                                DiagnosticsEngine *Diags) {
1360  using namespace options;
1361  bool Success = true;
1362
1363  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1364  Opts.DiagnosticSerializationFile =
1365    Args.getLastArgValue(OPT_diagnostic_serialized_file);
1366  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1367  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1368  Opts.Pedantic = Args.hasArg(OPT_pedantic);
1369  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1370  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1371  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1372  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1373                                 OPT_fno_show_column,
1374                                 /*Default=*/true);
1375  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1376  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1377  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1378
1379  // Default behavior is to not to show note include stacks.
1380  Opts.ShowNoteIncludeStack = false;
1381  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1382                               OPT_fno_diagnostics_show_note_include_stack))
1383    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1384      Opts.ShowNoteIncludeStack = true;
1385
1386  StringRef ShowOverloads =
1387    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1388  if (ShowOverloads == "best")
1389    Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1390  else if (ShowOverloads == "all")
1391    Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1392  else {
1393    Success = false;
1394    if (Diags)
1395      Diags->Report(diag::err_drv_invalid_value)
1396      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1397      << ShowOverloads;
1398  }
1399
1400  StringRef ShowCategory =
1401    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1402  if (ShowCategory == "none")
1403    Opts.ShowCategories = 0;
1404  else if (ShowCategory == "id")
1405    Opts.ShowCategories = 1;
1406  else if (ShowCategory == "name")
1407    Opts.ShowCategories = 2;
1408  else {
1409    Success = false;
1410    if (Diags)
1411      Diags->Report(diag::err_drv_invalid_value)
1412      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1413      << ShowCategory;
1414  }
1415
1416  StringRef Format =
1417    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1418  if (Format == "clang")
1419    Opts.Format = DiagnosticOptions::Clang;
1420  else if (Format == "msvc")
1421    Opts.Format = DiagnosticOptions::Msvc;
1422  else if (Format == "vi")
1423    Opts.Format = DiagnosticOptions::Vi;
1424  else {
1425    Success = false;
1426    if (Diags)
1427      Diags->Report(diag::err_drv_invalid_value)
1428      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1429      << Format;
1430  }
1431
1432  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1433  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1434  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1435  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1436  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1437  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1438  Opts.MacroBacktraceLimit
1439    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1440                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1441  Opts.TemplateBacktraceLimit
1442    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1443                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
1444                         Diags);
1445  Opts.ConstexprBacktraceLimit
1446    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1447                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
1448                         Diags);
1449  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1450                                    DiagnosticOptions::DefaultTabStop, Diags);
1451  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1452    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1453    if (Diags)
1454      Diags->Report(diag::warn_ignoring_ftabstop_value)
1455      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1456  }
1457  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1458  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1459  addWarningArgs(Args, Opts.Warnings);
1460
1461  return Success;
1462}
1463
1464static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1465  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1466}
1467
1468static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1469                                   DiagnosticsEngine &Diags) {
1470  using namespace options;
1471  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1472  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1473    switch (A->getOption().getID()) {
1474    default:
1475      llvm_unreachable("Invalid option in group!");
1476    case OPT_ast_list:
1477      Opts.ProgramAction = frontend::ASTDeclList; break;
1478    case OPT_ast_dump:
1479      Opts.ProgramAction = frontend::ASTDump; break;
1480    case OPT_ast_dump_xml:
1481      Opts.ProgramAction = frontend::ASTDumpXML; break;
1482    case OPT_ast_print:
1483      Opts.ProgramAction = frontend::ASTPrint; break;
1484    case OPT_ast_view:
1485      Opts.ProgramAction = frontend::ASTView; break;
1486    case OPT_dump_raw_tokens:
1487      Opts.ProgramAction = frontend::DumpRawTokens; break;
1488    case OPT_dump_tokens:
1489      Opts.ProgramAction = frontend::DumpTokens; break;
1490    case OPT_S:
1491      Opts.ProgramAction = frontend::EmitAssembly; break;
1492    case OPT_emit_llvm_bc:
1493      Opts.ProgramAction = frontend::EmitBC; break;
1494    case OPT_emit_html:
1495      Opts.ProgramAction = frontend::EmitHTML; break;
1496    case OPT_emit_llvm:
1497      Opts.ProgramAction = frontend::EmitLLVM; break;
1498    case OPT_emit_llvm_only:
1499      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1500    case OPT_emit_codegen_only:
1501      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1502    case OPT_emit_obj:
1503      Opts.ProgramAction = frontend::EmitObj; break;
1504    case OPT_fixit_EQ:
1505      Opts.FixItSuffix = A->getValue(Args);
1506      // fall-through!
1507    case OPT_fixit:
1508      Opts.ProgramAction = frontend::FixIt; break;
1509    case OPT_emit_module:
1510      Opts.ProgramAction = frontend::GenerateModule; break;
1511    case OPT_emit_pch:
1512      Opts.ProgramAction = frontend::GeneratePCH; break;
1513    case OPT_emit_pth:
1514      Opts.ProgramAction = frontend::GeneratePTH; break;
1515    case OPT_init_only:
1516      Opts.ProgramAction = frontend::InitOnly; break;
1517    case OPT_fsyntax_only:
1518      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1519    case OPT_print_decl_contexts:
1520      Opts.ProgramAction = frontend::PrintDeclContext; break;
1521    case OPT_print_preamble:
1522      Opts.ProgramAction = frontend::PrintPreamble; break;
1523    case OPT_E:
1524      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1525    case OPT_rewrite_macros:
1526      Opts.ProgramAction = frontend::RewriteMacros; break;
1527    case OPT_rewrite_objc:
1528      Opts.ProgramAction = frontend::RewriteObjC; break;
1529    case OPT_rewrite_test:
1530      Opts.ProgramAction = frontend::RewriteTest; break;
1531    case OPT_analyze:
1532      Opts.ProgramAction = frontend::RunAnalysis; break;
1533    case OPT_migrate:
1534      Opts.ProgramAction = frontend::MigrateSource; break;
1535    case OPT_Eonly:
1536      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1537    }
1538  }
1539
1540  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1541    Opts.Plugins.push_back(A->getValue(Args,0));
1542    Opts.ProgramAction = frontend::PluginAction;
1543    Opts.ActionName = A->getValue(Args);
1544
1545    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1546           end = Args.filtered_end(); it != end; ++it) {
1547      if ((*it)->getValue(Args, 0) == Opts.ActionName)
1548        Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1549    }
1550  }
1551
1552  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1553  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1554  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1555    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1556           end = Args.filtered_end(); it != end; ++it) {
1557      if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1558        Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1559    }
1560  }
1561
1562  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1563    Opts.CodeCompletionAt =
1564      ParsedSourceLocation::FromString(A->getValue(Args));
1565    if (Opts.CodeCompletionAt.FileName.empty())
1566      Diags.Report(diag::err_drv_invalid_value)
1567        << A->getAsString(Args) << A->getValue(Args);
1568  }
1569  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1570
1571  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1572  Opts.Plugins = Args.getAllArgValues(OPT_load);
1573  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1574  Opts.ShowHelp = Args.hasArg(OPT_help);
1575  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1576  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1577  Opts.ShowVersion = Args.hasArg(OPT_version);
1578  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1579  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1580  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1581  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1582  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1583  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1584  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1585
1586  Opts.CodeCompleteOpts.IncludeMacros
1587    = Args.hasArg(OPT_code_completion_macros);
1588  Opts.CodeCompleteOpts.IncludeCodePatterns
1589    = Args.hasArg(OPT_code_completion_patterns);
1590  Opts.CodeCompleteOpts.IncludeGlobals
1591    = !Args.hasArg(OPT_no_code_completion_globals);
1592  Opts.CodeCompleteOpts.IncludeBriefComments
1593    = Args.hasArg(OPT_code_completion_brief_comments);
1594
1595  Opts.OverrideRecordLayoutsFile
1596    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1597  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1598                                     OPT_arcmt_modify,
1599                                     OPT_arcmt_migrate)) {
1600    switch (A->getOption().getID()) {
1601    default:
1602      llvm_unreachable("missed a case");
1603    case OPT_arcmt_check:
1604      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1605      break;
1606    case OPT_arcmt_modify:
1607      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1608      break;
1609    case OPT_arcmt_migrate:
1610      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1611      break;
1612    }
1613  }
1614  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1615  Opts.ARCMTMigrateReportOut
1616    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1617  Opts.ARCMTMigrateEmitARCErrors
1618    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1619
1620  if (Args.hasArg(OPT_objcmt_migrate_literals))
1621    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1622  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1623    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1624
1625  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1626      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1627    Diags.Report(diag::err_drv_argument_not_allowed_with)
1628      << "ARC migration" << "ObjC migration";
1629  }
1630
1631  InputKind DashX = IK_None;
1632  if (const Arg *A = Args.getLastArg(OPT_x)) {
1633    DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1634      .Case("c", IK_C)
1635      .Case("cl", IK_OpenCL)
1636      .Case("cuda", IK_CUDA)
1637      .Case("c++", IK_CXX)
1638      .Case("objective-c", IK_ObjC)
1639      .Case("objective-c++", IK_ObjCXX)
1640      .Case("cpp-output", IK_PreprocessedC)
1641      .Case("assembler-with-cpp", IK_Asm)
1642      .Case("c++-cpp-output", IK_PreprocessedCXX)
1643      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1644      .Case("objc-cpp-output", IK_PreprocessedObjC)
1645      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1646      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1647      .Case("c-header", IK_C)
1648      .Case("cl-header", IK_OpenCL)
1649      .Case("objective-c-header", IK_ObjC)
1650      .Case("c++-header", IK_CXX)
1651      .Case("objective-c++-header", IK_ObjCXX)
1652      .Case("ast", IK_AST)
1653      .Case("ir", IK_LLVM_IR)
1654      .Default(IK_None);
1655    if (DashX == IK_None)
1656      Diags.Report(diag::err_drv_invalid_value)
1657        << A->getAsString(Args) << A->getValue(Args);
1658  }
1659
1660  // '-' is the default input if none is given.
1661  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1662  Opts.Inputs.clear();
1663  if (Inputs.empty())
1664    Inputs.push_back("-");
1665  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1666    InputKind IK = DashX;
1667    if (IK == IK_None) {
1668      IK = FrontendOptions::getInputKindForExtension(
1669        StringRef(Inputs[i]).rsplit('.').second);
1670      // FIXME: Remove this hack.
1671      if (i == 0)
1672        DashX = IK;
1673    }
1674    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1675  }
1676
1677  return DashX;
1678}
1679
1680std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1681                                                 void *MainAddr) {
1682  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1683
1684  if (!P.isEmpty()) {
1685    P.eraseComponent();  // Remove /clang from foo/bin/clang
1686    P.eraseComponent();  // Remove /bin   from foo/bin
1687
1688    // Get foo/lib/clang/<version>/include
1689    P.appendComponent("lib");
1690    P.appendComponent("clang");
1691    P.appendComponent(CLANG_VERSION_STRING);
1692  }
1693
1694  return P.str();
1695}
1696
1697static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1698  using namespace options;
1699  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1700  Opts.Verbose = Args.hasArg(OPT_v);
1701  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1702  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1703  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1704  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1705    Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1706  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1707  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1708  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1709
1710  // Add -I..., -F..., and -index-header-map options in order.
1711  bool IsIndexHeaderMap = false;
1712  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1713                                             OPT_index_header_map),
1714       ie = Args.filtered_end(); it != ie; ++it) {
1715    if ((*it)->getOption().matches(OPT_index_header_map)) {
1716      // -index-header-map applies to the next -I or -F.
1717      IsIndexHeaderMap = true;
1718      continue;
1719    }
1720
1721    frontend::IncludeDirGroup Group
1722      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1723
1724    Opts.AddPath((*it)->getValue(Args), Group, true,
1725                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1726    IsIndexHeaderMap = false;
1727  }
1728
1729  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1730  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1731  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1732                                             OPT_iwithprefixbefore),
1733         ie = Args.filtered_end(); it != ie; ++it) {
1734    const Arg *A = *it;
1735    if (A->getOption().matches(OPT_iprefix))
1736      Prefix = A->getValue(Args);
1737    else if (A->getOption().matches(OPT_iwithprefix))
1738      Opts.AddPath(Prefix.str() + A->getValue(Args),
1739                   frontend::System, false, false, false);
1740    else
1741      Opts.AddPath(Prefix.str() + A->getValue(Args),
1742                   frontend::Angled, false, false, false);
1743  }
1744
1745  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1746         ie = Args.filtered_end(); it != ie; ++it)
1747    Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1748  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1749         ie = Args.filtered_end(); it != ie; ++it)
1750    Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1751  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1752         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1753    Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1754                 !(*it)->getOption().matches(OPT_iwithsysroot));
1755  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1756         ie = Args.filtered_end(); it != ie; ++it)
1757    Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1758                 true);
1759
1760  // Add the paths for the various language specific isystem flags.
1761  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1762       ie = Args.filtered_end(); it != ie; ++it)
1763    Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1764  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1765       ie = Args.filtered_end(); it != ie; ++it)
1766    Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1767  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1768       ie = Args.filtered_end(); it != ie; ++it)
1769    Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1770  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1771       ie = Args.filtered_end(); it != ie; ++it)
1772    Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1773                 true);
1774
1775  // Add the internal paths from a driver that detects standard include paths.
1776  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1777                                            OPT_internal_externc_isystem),
1778                    E = Args.filtered_end();
1779       I != E; ++I)
1780    Opts.AddPath((*I)->getValue(Args), frontend::System,
1781                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1782                 (*I)->getOption().matches(OPT_internal_externc_isystem));
1783
1784  // Add the path prefixes which are implicitly treated as being system headers.
1785  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1786                                            OPT_ino_system_prefix),
1787                    E = Args.filtered_end();
1788       I != E; ++I)
1789    Opts.AddSystemHeaderPrefix((*I)->getValue(Args),
1790                               (*I)->getOption().matches(OPT_isystem_prefix));
1791}
1792
1793void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1794                                         LangStandard::Kind LangStd) {
1795  // Set some properties which depend solely on the input kind; it would be nice
1796  // to move these to the language standard, and have the driver resolve the
1797  // input kind + language standard.
1798  if (IK == IK_Asm) {
1799    Opts.AsmPreprocessor = 1;
1800  } else if (IK == IK_ObjC ||
1801             IK == IK_ObjCXX ||
1802             IK == IK_PreprocessedObjC ||
1803             IK == IK_PreprocessedObjCXX) {
1804    Opts.ObjC1 = Opts.ObjC2 = 1;
1805  }
1806
1807  if (LangStd == LangStandard::lang_unspecified) {
1808    // Based on the base language, pick one.
1809    switch (IK) {
1810    case IK_None:
1811    case IK_AST:
1812    case IK_LLVM_IR:
1813      llvm_unreachable("Invalid input kind!");
1814    case IK_OpenCL:
1815      LangStd = LangStandard::lang_opencl;
1816      break;
1817    case IK_CUDA:
1818      LangStd = LangStandard::lang_cuda;
1819      break;
1820    case IK_Asm:
1821    case IK_C:
1822    case IK_PreprocessedC:
1823    case IK_ObjC:
1824    case IK_PreprocessedObjC:
1825      LangStd = LangStandard::lang_gnu99;
1826      break;
1827    case IK_CXX:
1828    case IK_PreprocessedCXX:
1829    case IK_ObjCXX:
1830    case IK_PreprocessedObjCXX:
1831      LangStd = LangStandard::lang_gnucxx98;
1832      break;
1833    }
1834  }
1835
1836  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1837  Opts.BCPLComment = Std.hasBCPLComments();
1838  Opts.C99 = Std.isC99();
1839  Opts.C11 = Std.isC11();
1840  Opts.CPlusPlus = Std.isCPlusPlus();
1841  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1842  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
1843  Opts.Digraphs = Std.hasDigraphs();
1844  Opts.GNUMode = Std.isGNUMode();
1845  Opts.GNUInline = !Std.isC99();
1846  Opts.HexFloats = Std.hasHexFloats();
1847  Opts.ImplicitInt = Std.hasImplicitInt();
1848
1849  // Set OpenCL Version.
1850  if (LangStd == LangStandard::lang_opencl) {
1851    Opts.OpenCL = 1;
1852    Opts.OpenCLVersion = 100;
1853  }
1854  else if (LangStd == LangStandard::lang_opencl11) {
1855      Opts.OpenCL = 1;
1856      Opts.OpenCLVersion = 110;
1857  }
1858  else if (LangStd == LangStandard::lang_opencl12) {
1859    Opts.OpenCL = 1;
1860    Opts.OpenCLVersion = 120;
1861  }
1862
1863  // OpenCL has some additional defaults.
1864  if (Opts.OpenCL) {
1865    Opts.AltiVec = 0;
1866    Opts.CXXOperatorNames = 1;
1867    Opts.LaxVectorConversions = 0;
1868    Opts.DefaultFPContract = 1;
1869  }
1870
1871  if (LangStd == LangStandard::lang_cuda)
1872    Opts.CUDA = 1;
1873
1874  // OpenCL and C++ both have bool, true, false keywords.
1875  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1876
1877  // C++ has wchar_t keyword.
1878  Opts.WChar = Opts.CPlusPlus;
1879
1880  Opts.GNUKeywords = Opts.GNUMode;
1881  Opts.CXXOperatorNames = Opts.CPlusPlus;
1882
1883  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1884  // is specified, or -std is set to a conforming mode.
1885  Opts.Trigraphs = !Opts.GNUMode;
1886
1887  Opts.DollarIdents = !Opts.AsmPreprocessor;
1888}
1889
1890static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1891                          DiagnosticsEngine &Diags) {
1892  // FIXME: Cleanup per-file based stuff.
1893  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1894  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1895    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1896#define LANGSTANDARD(id, name, desc, features) \
1897      .Case(name, LangStandard::lang_##id)
1898#include "clang/Frontend/LangStandards.def"
1899      .Default(LangStandard::lang_unspecified);
1900    if (LangStd == LangStandard::lang_unspecified)
1901      Diags.Report(diag::err_drv_invalid_value)
1902        << A->getAsString(Args) << A->getValue(Args);
1903    else {
1904      // Valid standard, check to make sure language and standard are compatable.
1905      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1906      switch (IK) {
1907      case IK_C:
1908      case IK_ObjC:
1909      case IK_PreprocessedC:
1910      case IK_PreprocessedObjC:
1911        if (!(Std.isC89() || Std.isC99()))
1912          Diags.Report(diag::err_drv_argument_not_allowed_with)
1913            << A->getAsString(Args) << "C/ObjC";
1914        break;
1915      case IK_CXX:
1916      case IK_ObjCXX:
1917      case IK_PreprocessedCXX:
1918      case IK_PreprocessedObjCXX:
1919        if (!Std.isCPlusPlus())
1920          Diags.Report(diag::err_drv_argument_not_allowed_with)
1921            << A->getAsString(Args) << "C++/ObjC++";
1922        break;
1923      case IK_OpenCL:
1924        if (!Std.isC99())
1925          Diags.Report(diag::err_drv_argument_not_allowed_with)
1926            << A->getAsString(Args) << "OpenCL";
1927        break;
1928      case IK_CUDA:
1929        if (!Std.isCPlusPlus())
1930          Diags.Report(diag::err_drv_argument_not_allowed_with)
1931            << A->getAsString(Args) << "CUDA";
1932        break;
1933      default:
1934        break;
1935      }
1936    }
1937  }
1938
1939  // -cl-std only applies for OpenCL language standards.
1940  // Override the -std option in this case.
1941  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1942    LangStandard::Kind OpenCLLangStd
1943    = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1944    .Case("CL", LangStandard::lang_opencl)
1945    .Case("CL1.1", LangStandard::lang_opencl11)
1946    .Case("CL1.2", LangStandard::lang_opencl12)
1947    .Default(LangStandard::lang_unspecified);
1948
1949    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1950      Diags.Report(diag::err_drv_invalid_value)
1951      << A->getAsString(Args) << A->getValue(Args);
1952    }
1953    else
1954      LangStd = OpenCLLangStd;
1955  }
1956
1957  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1958
1959  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1960  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1961  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1962  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1963  // name, as it doesn't seem a useful distinction.
1964  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1965                                  Opts.GNUKeywords);
1966
1967  if (Args.hasArg(OPT_fno_operator_names))
1968    Opts.CXXOperatorNames = 0;
1969
1970  if (Opts.ObjC1) {
1971    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1972      StringRef value = arg->getValue(Args);
1973      if (Opts.ObjCRuntime.tryParse(value))
1974        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1975    }
1976
1977    if (Args.hasArg(OPT_fobjc_gc_only))
1978      Opts.setGC(LangOptions::GCOnly);
1979    else if (Args.hasArg(OPT_fobjc_gc))
1980      Opts.setGC(LangOptions::HybridGC);
1981    else if (Args.hasArg(OPT_fobjc_arc)) {
1982      Opts.ObjCAutoRefCount = 1;
1983      if (!Opts.ObjCRuntime.allowsARC())
1984        Diags.Report(diag::err_arc_unsupported_on_runtime);
1985
1986      // Only set ObjCARCWeak if ARC is enabled.
1987      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1988        Opts.ObjCARCWeak = 1;
1989      else
1990        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1991    }
1992
1993    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1994      Opts.ObjCInferRelatedResultType = 0;
1995  }
1996
1997  if (Args.hasArg(OPT_fgnu89_inline))
1998    Opts.GNUInline = 1;
1999
2000  if (Args.hasArg(OPT_fapple_kext)) {
2001    if (!Opts.CPlusPlus)
2002      Diags.Report(diag::warn_c_kext);
2003    else
2004      Opts.AppleKext = 1;
2005  }
2006
2007  if (Args.hasArg(OPT_print_ivar_layout))
2008    Opts.ObjCGCBitmapPrint = 1;
2009  if (Args.hasArg(OPT_fno_constant_cfstrings))
2010    Opts.NoConstantCFStrings = 1;
2011
2012  if (Args.hasArg(OPT_faltivec))
2013    Opts.AltiVec = 1;
2014
2015  if (Args.hasArg(OPT_pthread))
2016    Opts.POSIXThreads = 1;
2017
2018  if (Args.hasArg(OPT_fdelayed_template_parsing))
2019    Opts.DelayedTemplateParsing = 1;
2020
2021  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
2022  if (Vis == "default")
2023    Opts.setVisibilityMode(DefaultVisibility);
2024  else if (Vis == "hidden")
2025    Opts.setVisibilityMode(HiddenVisibility);
2026  else if (Vis == "protected")
2027    // FIXME: diagnose if target does not support protected visibility
2028    Opts.setVisibilityMode(ProtectedVisibility);
2029  else
2030    Diags.Report(diag::err_drv_invalid_value)
2031      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
2032
2033  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2034    StringRef Val = A->getValue(Args);
2035    if (Val == "fast")
2036      Opts.setFPContractMode(LangOptions::FPC_Fast);
2037    else if (Val == "on")
2038      Opts.setFPContractMode(LangOptions::FPC_On);
2039    else if (Val == "off")
2040      Opts.setFPContractMode(LangOptions::FPC_Off);
2041    else
2042      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2043  }
2044
2045  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2046    Opts.InlineVisibilityHidden = 1;
2047
2048  if (Args.hasArg(OPT_ftrapv)) {
2049    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2050    // Set the handler, if one is specified.
2051    Opts.OverflowHandler =
2052        Args.getLastArgValue(OPT_ftrapv_handler);
2053  }
2054  else if (Args.hasArg(OPT_fwrapv))
2055    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2056
2057  if (Args.hasArg(OPT_trigraphs))
2058    Opts.Trigraphs = 1;
2059
2060  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2061                                   OPT_fno_dollars_in_identifiers,
2062                                   Opts.DollarIdents);
2063  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2064  Opts.MicrosoftExt
2065    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
2066  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
2067  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
2068  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2069  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2070  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2071                                   Opts.ConstStrings);
2072  if (Args.hasArg(OPT_fno_lax_vector_conversions))
2073    Opts.LaxVectorConversions = 0;
2074  if (Args.hasArg(OPT_fno_threadsafe_statics))
2075    Opts.ThreadsafeStatics = 0;
2076  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2077  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2078  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2079  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2080  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2081
2082  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
2083  Opts.Blocks = Args.hasArg(OPT_fblocks);
2084  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2085  Opts.Modules = Args.hasArg(OPT_fmodules);
2086  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
2087  Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
2088  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
2089  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2090  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2091  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2092  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
2093  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2094  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2095  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2096  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
2097  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
2098                                                    Diags);
2099  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
2100                                                    Diags);
2101  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2102  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
2103                                                    0, Diags);
2104  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2105  Opts.ObjCConstantStringClass =
2106    Args.getLastArgValue(OPT_fconstant_string_class);
2107  Opts.ObjCDefaultSynthProperties =
2108    Args.hasArg(OPT_fobjc_default_synthesize_properties);
2109  Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
2110  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2111  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
2112  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
2113  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
2114  Opts.Static = Args.hasArg(OPT_static_define);
2115  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2116  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2117                        || Args.hasArg(OPT_fdump_record_layouts);
2118  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2119  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2120  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2121  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2122  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2123  Opts.MRTD = Args.hasArg(OPT_mrtd);
2124  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2125  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2126  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2127  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2128  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2129  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2130  Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
2131  Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
2132  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2133  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
2134
2135  // Record whether the __DEPRECATED define was requested.
2136  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2137                                 OPT_fno_deprecated_macro,
2138                                 Opts.Deprecated);
2139
2140  // FIXME: Eliminate this dependency.
2141  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2142       OptSize = getOptimizationLevelSize(Args, IK, Diags);
2143  Opts.Optimize = Opt != 0;
2144  Opts.OptimizeSize = OptSize != 0;
2145
2146  // This is the __NO_INLINE__ define, which just depends on things like the
2147  // optimization level and -fno-inline, not actually whether the backend has
2148  // inlining enabled.
2149  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2150
2151  Opts.FastMath = Args.hasArg(OPT_ffast_math);
2152  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
2153
2154  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
2155
2156  Opts.RetainCommentsFromSystemHeaders =
2157      Args.hasArg(OPT_fretain_comments_from_system_headers);
2158
2159  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
2160  switch (SSP) {
2161  default:
2162    Diags.Report(diag::err_drv_invalid_value)
2163      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2164    break;
2165  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2166  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2167  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
2168  }
2169}
2170
2171static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2172                                  FileManager &FileMgr,
2173                                  DiagnosticsEngine &Diags) {
2174  using namespace options;
2175  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2176  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2177  if (const Arg *A = Args.getLastArg(OPT_token_cache))
2178      Opts.TokenCache = A->getValue(Args);
2179  else
2180    Opts.TokenCache = Opts.ImplicitPTHInclude;
2181  Opts.UsePredefines = !Args.hasArg(OPT_undef);
2182  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2183  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2184
2185  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2186  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
2187         ie = Args.filtered_end(); it != ie; ++it) {
2188    const Arg *A = *it;
2189    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
2190  }
2191
2192  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2193    StringRef Value(A->getValue(Args));
2194    size_t Comma = Value.find(',');
2195    unsigned Bytes = 0;
2196    unsigned EndOfLine = 0;
2197
2198    if (Comma == StringRef::npos ||
2199        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2200        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2201      Diags.Report(diag::err_drv_preamble_format);
2202    else {
2203      Opts.PrecompiledPreambleBytes.first = Bytes;
2204      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2205    }
2206  }
2207
2208  // Add macros from the command line.
2209  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
2210         ie = Args.filtered_end(); it != ie; ++it) {
2211    if ((*it)->getOption().matches(OPT_D))
2212      Opts.addMacroDef((*it)->getValue(Args));
2213    else
2214      Opts.addMacroUndef((*it)->getValue(Args));
2215  }
2216
2217  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2218
2219  // Add the ordered list of -includes.
2220  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
2221                                             OPT_include_pth),
2222         ie = Args.filtered_end(); it != ie; ++it) {
2223    const Arg *A = *it;
2224    // PCH is handled specially, we need to extra the original include path.
2225    if (A->getOption().matches(OPT_include_pch)) {
2226      std::string OriginalFile =
2227        ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
2228      if (OriginalFile.empty())
2229        continue;
2230
2231      Opts.Includes.push_back(OriginalFile);
2232    } else
2233      Opts.Includes.push_back(A->getValue(Args));
2234  }
2235
2236  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2237         ie = Args.filtered_end(); it != ie; ++it) {
2238    const Arg *A = *it;
2239    Opts.ChainedIncludes.push_back(A->getValue(Args));
2240  }
2241
2242  // Include 'altivec.h' if -faltivec option present
2243  if (Args.hasArg(OPT_faltivec))
2244    Opts.Includes.push_back("altivec.h");
2245
2246  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2247         ie = Args.filtered_end(); it != ie; ++it) {
2248    const Arg *A = *it;
2249    std::pair<StringRef,StringRef> Split =
2250      StringRef(A->getValue(Args)).split(';');
2251
2252    if (Split.second.empty()) {
2253      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2254      continue;
2255    }
2256
2257    Opts.addRemappedFile(Split.first, Split.second);
2258  }
2259
2260  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2261    StringRef Name = A->getValue(Args);
2262    unsigned Library = llvm::StringSwitch<unsigned>(Name)
2263      .Case("libc++", ARCXX_libcxx)
2264      .Case("libstdc++", ARCXX_libstdcxx)
2265      .Case("none", ARCXX_nolib)
2266      .Default(~0U);
2267    if (Library == ~0U)
2268      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2269    else
2270      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2271  }
2272}
2273
2274static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2275                                        ArgList &Args) {
2276  using namespace options;
2277  Opts.ShowCPP = !Args.hasArg(OPT_dM);
2278  Opts.ShowComments = Args.hasArg(OPT_C);
2279  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2280  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2281  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2282  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2283}
2284
2285static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2286  using namespace options;
2287  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2288  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2289  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2290  Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
2291  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2292  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2293
2294  // Use the default target triple if unspecified.
2295  if (Opts.Triple.empty())
2296    Opts.Triple = llvm::sys::getDefaultTargetTriple();
2297}
2298
2299//
2300
2301bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2302                                        const char *const *ArgBegin,
2303                                        const char *const *ArgEnd,
2304                                        DiagnosticsEngine &Diags) {
2305  bool Success = true;
2306
2307  // Parse the arguments.
2308  OwningPtr<OptTable> Opts(createDriverOptTable());
2309  unsigned MissingArgIndex, MissingArgCount;
2310  OwningPtr<InputArgList> Args(
2311    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2312
2313  // Check for missing argument error.
2314  if (MissingArgCount) {
2315    Diags.Report(diag::err_drv_missing_argument)
2316      << Args->getArgString(MissingArgIndex) << MissingArgCount;
2317    Success = false;
2318  }
2319
2320  // Issue errors on unknown arguments.
2321  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2322         ie = Args->filtered_end(); it != ie; ++it) {
2323    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2324    Success = false;
2325  }
2326
2327  // Issue errors on arguments that are not valid for CC1.
2328  for (ArgList::iterator I = Args->begin(), E = Args->end();
2329       I != E; ++I) {
2330    if (!(*I)->getOption().isCC1Option()) {
2331      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
2332      Success = false;
2333    }
2334  }
2335
2336  Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
2337  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2338  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2339  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
2340            && Success;
2341  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2342  // FIXME: We shouldn't have to pass the DashX option around here
2343  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2344  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2345            && Success;
2346  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2347  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2348    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2349    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2350      Res.getLangOpts()->ObjCExceptions = 1;
2351  }
2352  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2353  // PCH file and find the original header name. Remove the need to do that in
2354  // ParsePreprocessorArgs and remove the FileManager
2355  // parameters from the function and the "FileManager.h" #include.
2356  FileManager FileMgr(Res.getFileSystemOpts());
2357  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2358  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2359  ParseTargetArgs(Res.getTargetOpts(), *Args);
2360
2361  return Success;
2362}
2363
2364namespace {
2365
2366  class ModuleSignature {
2367    llvm::SmallVector<uint64_t, 16> Data;
2368    unsigned CurBit;
2369    uint64_t CurValue;
2370
2371  public:
2372    ModuleSignature() : CurBit(0), CurValue(0) { }
2373
2374    void add(uint64_t Value, unsigned Bits);
2375    void add(StringRef Value);
2376    void flush();
2377
2378    llvm::APInt getAsInteger() const;
2379  };
2380}
2381
2382void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2383  CurValue |= Value << CurBit;
2384  if (CurBit + NumBits < 64) {
2385    CurBit += NumBits;
2386    return;
2387  }
2388
2389  // Add the current word.
2390  Data.push_back(CurValue);
2391
2392  if (CurBit)
2393    CurValue = Value >> (64-CurBit);
2394  else
2395    CurValue = 0;
2396  CurBit = (CurBit+NumBits) & 63;
2397}
2398
2399void ModuleSignature::flush() {
2400  if (CurBit == 0)
2401    return;
2402
2403  Data.push_back(CurValue);
2404  CurBit = 0;
2405  CurValue = 0;
2406}
2407
2408void ModuleSignature::add(StringRef Value) {
2409  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2410    add(*I, 8);
2411}
2412
2413llvm::APInt ModuleSignature::getAsInteger() const {
2414  return llvm::APInt(Data.size() * 64, Data);
2415}
2416
2417std::string CompilerInvocation::getModuleHash() const {
2418  ModuleSignature Signature;
2419
2420  // Start the signature with the compiler version.
2421  // FIXME: The full version string can be quite long.  Omit it from the
2422  // module hash for now to avoid failures where the path name becomes too
2423  // long.  An MD5 or similar checksum would work well here.
2424  // Signature.add(getClangFullRepositoryVersion());
2425
2426  // Extend the signature with the language options
2427#define LANGOPT(Name, Bits, Default, Description) \
2428  Signature.add(LangOpts->Name, Bits);
2429#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2430  Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2431#define BENIGN_LANGOPT(Name, Bits, Default, Description)
2432#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2433#include "clang/Basic/LangOptions.def"
2434
2435  // Extend the signature with the target triple
2436  // FIXME: Add target options.
2437  llvm::Triple T(TargetOpts->Triple);
2438  Signature.add((unsigned)T.getArch(), 5);
2439  Signature.add((unsigned)T.getVendor(), 4);
2440  Signature.add((unsigned)T.getOS(), 5);
2441  Signature.add((unsigned)T.getEnvironment(), 4);
2442
2443  // Extend the signature with preprocessor options.
2444  Signature.add(getPreprocessorOpts().UsePredefines, 1);
2445  Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2446
2447  // Hash the preprocessor defines.
2448  // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2449  std::vector<StringRef> MacroDefs;
2450  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2451            I = getPreprocessorOpts().Macros.begin(),
2452         IEnd = getPreprocessorOpts().Macros.end();
2453       I != IEnd; ++I) {
2454    if (!I->second)
2455      MacroDefs.push_back(I->first);
2456  }
2457  llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2458
2459  unsigned PPHashResult = 0;
2460  for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2461    PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2462  Signature.add(PPHashResult, 32);
2463
2464  // We've generated the signature. Treat it as one large APInt that we'll
2465  // encode in base-36 and return.
2466  Signature.flush();
2467  return Signature.getAsInteger().toString(36, /*Signed=*/false);
2468}
2469