CompilerInvocation.cpp revision 255d4d4226b24036ceb11228fbb74286e58620f7 
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()) {}
39
40CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
41  : RefCountedBase<CompilerInvocation>(),
42    LangOpts(new LangOptions(*X.getLangOpts())) {}
43
44//===----------------------------------------------------------------------===//
45// Utility functions.
46//===----------------------------------------------------------------------===//
47
48static const char *getAnalysisStoreName(AnalysisStores Kind) {
49  switch (Kind) {
50  default:
51    llvm_unreachable("Unknown analysis store!");
52#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
53  case NAME##Model: return CMDFLAG;
54#include "clang/StaticAnalyzer/Analyses.def"
55  }
56}
57
58static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
59  switch (Kind) {
60  default:
61    llvm_unreachable("Unknown analysis constraints!");
62#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
63  case NAME##Model: return CMDFLAG;
64#include "clang/StaticAnalyzer/Analyses.def"
65  }
66}
67
68static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
69  switch (Kind) {
70  default:
71    llvm_unreachable("Unknown analysis client!");
72#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
73  case PD_##NAME: return CMDFLAG;
74#include "clang/StaticAnalyzer/Analyses.def"
75  }
76}
77
78static const char *getAnalysisPurgeModeName(AnalysisPurgeMode Kind) {
79  switch (Kind) {
80  default:
81    llvm_unreachable("Unknown analysis purge mode!");
82#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
83  case NAME: return CMDFLAG;
84#include "clang/StaticAnalyzer/Analyses.def"
85  }
86}
87
88static const char *getAnalysisIPAModeName(AnalysisIPAMode Kind) {
89  switch (Kind) {
90  default:
91    llvm_unreachable("Unknown analysis ipa mode!");
92#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
93  case NAME: return CMDFLAG;
94#include "clang/StaticAnalyzer/Analyses.def"
95  }
96}
97
98static const char *
99  getAnalysisInliningModeName(AnalysisInliningMode Kind) {
100  switch (Kind) {
101  default:
102    llvm_unreachable("Unknown analysis inlining mode!");
103#define ANALYSIS_INLINE_SELECTION(NAME, CMDFLAG, DESC) \
104  case NAME: return CMDFLAG;
105#include "clang/StaticAnalyzer/Analyses.def"
106  }
107}
108
109//===----------------------------------------------------------------------===//
110// Serialization (to args)
111//===----------------------------------------------------------------------===//
112
113namespace {
114  /// ToArgsList - Helper class to create a list of std::strings.
115  class ToArgsList {
116    std::vector<std::string> &Res;
117  public:
118    explicit ToArgsList(std::vector<std::string> &Res) : Res(Res) {}
119
120    void push_back(StringRef Str) {
121      // Avoid creating a temporary string.
122      Res.push_back(std::string());
123      Res.back().assign(Str.data(), Str.size());
124    }
125
126    void push_back(StringRef Str1, StringRef Str2) {
127      push_back(Str1);
128      push_back(Str2);
129    }
130  };
131}
132
133static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts, ToArgsList &Res) {
134  if (Opts.ShowCheckerHelp)
135    Res.push_back("-analyzer-checker-help");
136  if (Opts.AnalysisStoreOpt != RegionStoreModel)
137    Res.push_back("-analyzer-store",
138                  getAnalysisStoreName(Opts.AnalysisStoreOpt));
139  if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel)
140    Res.push_back("-analyzer-constraints",
141                  getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
142  if (Opts.AnalysisDiagOpt != PD_HTML)
143    Res.push_back("-analyzer-output",
144                  getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
145  if (Opts.AnalysisPurgeOpt != PurgeStmt)
146    Res.push_back("-analyzer-purge",
147                  getAnalysisPurgeModeName(Opts.AnalysisPurgeOpt));
148  if (!Opts.AnalyzeSpecificFunction.empty())
149    Res.push_back("-analyze-function", Opts.AnalyzeSpecificFunction);
150  if (Opts.IPAMode != BasicInlining)
151    Res.push_back("-analyzer-ipa", getAnalysisIPAModeName(Opts.IPAMode));
152  if (Opts.InliningMode != NoRedundancy)
153    Res.push_back("-analyzer-inlining-mode",
154                  getAnalysisInliningModeName(Opts.InliningMode));
155
156  if (Opts.AnalyzeAll)
157    Res.push_back("-analyzer-opt-analyze-headers");
158  if (Opts.AnalyzerDisplayProgress)
159    Res.push_back("-analyzer-display-progress");
160  if (Opts.AnalyzeNestedBlocks)
161    Res.push_back("-analyzer-opt-analyze-nested-blocks");
162  if (Opts.EagerlyAssume)
163    Res.push_back("-analyzer-eagerly-assume");
164  if (Opts.TrimGraph)
165    Res.push_back("-trim-egraph");
166  if (Opts.VisualizeEGDot)
167    Res.push_back("-analyzer-viz-egraph-graphviz");
168  if (Opts.VisualizeEGUbi)
169    Res.push_back("-analyzer-viz-egraph-ubigraph");
170  if (Opts.NoRetryExhausted)
171    Res.push_back("-analyzer-disable-retry-exhausted");
172
173  for (unsigned i = 0, e = Opts.CheckersControlList.size(); i != e; ++i) {
174    const std::pair<std::string, bool> &opt = Opts.CheckersControlList[i];
175    if (opt.second)
176      Res.push_back("-analyzer-disable-checker");
177    else
178      Res.push_back("-analyzer-checker");
179    Res.push_back(opt.first);
180  }
181}
182
183static void CodeGenOptsToArgs(const CodeGenOptions &Opts, ToArgsList &Res) {
184  switch (Opts.DebugInfo) {
185    case CodeGenOptions::NoDebugInfo:
186      break;
187    case CodeGenOptions::DebugLineTablesOnly:
188      Res.push_back("-gline-tables-only");
189      break;
190    case CodeGenOptions::LimitedDebugInfo:
191      Res.push_back("-g");
192      Res.push_back("-flimit-debug-info");
193      break;
194    case CodeGenOptions::FullDebugInfo:
195      Res.push_back("-g");
196      Res.push_back("-fno-limit-debug-info");
197      break;
198  }
199  if (Opts.DisableLLVMOpts)
200    Res.push_back("-disable-llvm-optzns");
201  if (Opts.DisableRedZone)
202    Res.push_back("-disable-red-zone");
203  if (Opts.DisableTailCalls)
204    Res.push_back("-mdisable-tail-calls");
205  if (!Opts.DebugCompilationDir.empty())
206    Res.push_back("-fdebug-compilation-dir", Opts.DebugCompilationDir);
207  if (!Opts.DwarfDebugFlags.empty())
208    Res.push_back("-dwarf-debug-flags", Opts.DwarfDebugFlags);
209  if (Opts.EmitGcovArcs)
210    Res.push_back("-femit-coverage-data");
211  if (Opts.EmitGcovNotes)
212    Res.push_back("-femit-coverage-notes");
213  if (Opts.EmitOpenCLArgMetadata)
214    Res.push_back("-cl-kernel-arg-info");
215  if (!Opts.MergeAllConstants)
216    Res.push_back("-fno-merge-all-constants");
217  if (Opts.NoCommon)
218    Res.push_back("-fno-common");
219  if (Opts.ForbidGuardVariables)
220    Res.push_back("-fforbid-guard-variables");
221  if (Opts.UseRegisterSizedBitfieldAccess)
222    Res.push_back("-fuse-register-sized-bitfield-access");
223  if (Opts.NoImplicitFloat)
224    Res.push_back("-no-implicit-float");
225  if (Opts.OmitLeafFramePointer)
226    Res.push_back("-momit-leaf-frame-pointer");
227  if (Opts.OptimizeSize) {
228    assert(Opts.OptimizationLevel == 2 && "Invalid options!");
229    Opts.OptimizeSize == 1 ? Res.push_back("-Os") : Res.push_back("-Oz");
230  } else if (Opts.OptimizationLevel != 0)
231    Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
232  if (!Opts.MainFileName.empty())
233    Res.push_back("-main-file-name", Opts.MainFileName);
234  if (Opts.NoInfsFPMath)
235    Res.push_back("-menable-no-infinities");
236  if (Opts.NoNaNsFPMath)
237    Res.push_back("-menable-no-nans");
238  // SimplifyLibCalls is only derived.
239  // TimePasses is only derived.
240  // UnitAtATime is unused.
241  // Inlining is only derived.
242
243  // UnrollLoops is derived, but also accepts an option, no
244  // harm in pushing it back here.
245  if (Opts.UnrollLoops)
246    Res.push_back("-funroll-loops");
247  if (Opts.DataSections)
248    Res.push_back("-fdata-sections");
249  if (Opts.FunctionSections)
250    Res.push_back("-ffunction-sections");
251  if (Opts.AsmVerbose)
252    Res.push_back("-masm-verbose");
253  if (!Opts.CodeModel.empty())
254    Res.push_back("-mcode-model", Opts.CodeModel);
255  if (Opts.CUDAIsDevice)
256    Res.push_back("-fcuda-is-device");
257  if (!Opts.CXAAtExit)
258    Res.push_back("-fno-use-cxa-atexit");
259  if (Opts.CXXCtorDtorAliases)
260    Res.push_back("-mconstructor-aliases");
261  if (Opts.ObjCAutoRefCountExceptions)
262    Res.push_back("-fobjc-arc-eh");
263  if (!Opts.DebugPass.empty()) {
264    Res.push_back("-mdebug-pass", Opts.DebugPass);
265  }
266  if (Opts.DisableFPElim)
267    Res.push_back("-mdisable-fp-elim");
268  if (!Opts.FloatABI.empty())
269    Res.push_back("-mfloat-abi", Opts.FloatABI);
270  if (!Opts.LimitFloatPrecision.empty())
271    Res.push_back("-mlimit-float-precision", Opts.LimitFloatPrecision);
272  if (Opts.NoZeroInitializedInBSS)
273    Res.push_back("-mno-zero-initialized-bss");
274  switch (Opts.getObjCDispatchMethod()) {
275  case CodeGenOptions::Legacy:
276    break;
277  case CodeGenOptions::Mixed:
278    Res.push_back("-fobjc-dispatch-method=mixed");
279    break;
280  case CodeGenOptions::NonLegacy:
281    Res.push_back("-fobjc-dispatch-method=non-legacy");
282    break;
283  }
284  if (Opts.BoundsChecking > 0)
285    Res.push_back("-fbounds-checking=" + llvm::utostr(Opts.BoundsChecking));
286  if (Opts.NumRegisterParameters)
287    Res.push_back("-mregparm", llvm::utostr(Opts.NumRegisterParameters));
288  if (Opts.NoGlobalMerge)
289    Res.push_back("-mno-global-merge");
290  if (Opts.NoExecStack)
291    Res.push_back("-mnoexecstack");
292  if (Opts.RelaxAll)
293    Res.push_back("-mrelax-all");
294  if (Opts.SaveTempLabels)
295    Res.push_back("-msave-temp-labels");
296  if (Opts.NoDwarf2CFIAsm)
297    Res.push_back("-fno-dwarf2-cfi-asm");
298  if (Opts.NoDwarfDirectoryAsm)
299    Res.push_back("-fno-dwarf-directory-asm");
300  if (Opts.SoftFloat)
301    Res.push_back("-msoft-float");
302  if (Opts.StrictEnums)
303    Res.push_back("-fstrict-enums");
304  if (Opts.UnwindTables)
305    Res.push_back("-munwind-tables");
306  if (Opts.RelocationModel != "pic")
307    Res.push_back("-mrelocation-model", Opts.RelocationModel);
308  if (!Opts.VerifyModule)
309    Res.push_back("-disable-llvm-verifier");
310  for (unsigned i = 0, e = Opts.BackendOptions.size(); i != e; ++i)
311    Res.push_back("-backend-option", Opts.BackendOptions[i]);
312
313  switch (Opts.DefaultTLSModel) {
314  case CodeGenOptions::GeneralDynamicTLSModel:
315    break;
316  case CodeGenOptions::LocalDynamicTLSModel:
317    Res.push_back("-ftls-model=local-dynamic");
318    break;
319  case CodeGenOptions::InitialExecTLSModel:
320    Res.push_back("-ftls-model=initial-exec");
321    break;
322  case CodeGenOptions::LocalExecTLSModel:
323    Res.push_back("-ftls-model=local-exec");
324    break;
325  }
326}
327
328static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
329                                       ToArgsList &Res) {
330  if (Opts.IncludeSystemHeaders)
331    Res.push_back("-sys-header-deps");
332  if (Opts.ShowHeaderIncludes)
333    Res.push_back("-H");
334  if (!Opts.HeaderIncludeOutputFile.empty())
335    Res.push_back("-header-include-file", Opts.HeaderIncludeOutputFile);
336  if (Opts.UsePhonyTargets)
337    Res.push_back("-MP");
338  if (!Opts.OutputFile.empty())
339    Res.push_back("-dependency-file", Opts.OutputFile);
340  for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i)
341    Res.push_back("-MT", Opts.Targets[i]);
342}
343
344static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
345                                 ToArgsList &Res) {
346  if (Opts.IgnoreWarnings)
347    Res.push_back("-w");
348  if (Opts.NoRewriteMacros)
349    Res.push_back("-Wno-rewrite-macros");
350  if (Opts.Pedantic)
351    Res.push_back("-pedantic");
352  if (Opts.PedanticErrors)
353    Res.push_back("-pedantic-errors");
354  if (!Opts.ShowColumn)
355    Res.push_back("-fno-show-column");
356  if (!Opts.ShowLocation)
357    Res.push_back("-fno-show-source-location");
358  if (!Opts.ShowCarets)
359    Res.push_back("-fno-caret-diagnostics");
360  if (!Opts.ShowFixits)
361    Res.push_back("-fno-diagnostics-fixit-info");
362  if (Opts.ShowSourceRanges)
363    Res.push_back("-fdiagnostics-print-source-range-info");
364  if (Opts.ShowParseableFixits)
365    Res.push_back("-fdiagnostics-parseable-fixits");
366  if (Opts.ShowColors)
367    Res.push_back("-fcolor-diagnostics");
368  if (Opts.VerifyDiagnostics)
369    Res.push_back("-verify");
370  if (Opts.ShowOptionNames)
371    Res.push_back("-fdiagnostics-show-option");
372  if (Opts.ShowCategories == 1)
373    Res.push_back("-fdiagnostics-show-category=id");
374  else if (Opts.ShowCategories == 2)
375    Res.push_back("-fdiagnostics-show-category=name");
376  switch (Opts.Format) {
377  case DiagnosticOptions::Clang:
378    Res.push_back("-fdiagnostics-format=clang"); break;
379  case DiagnosticOptions::Msvc:
380    Res.push_back("-fdiagnostics-format=msvc");  break;
381  case DiagnosticOptions::Vi:
382    Res.push_back("-fdiagnostics-format=vi");    break;
383  }
384  if (Opts.ErrorLimit)
385    Res.push_back("-ferror-limit", llvm::utostr(Opts.ErrorLimit));
386  if (!Opts.DiagnosticLogFile.empty())
387    Res.push_back("-diagnostic-log-file", Opts.DiagnosticLogFile);
388  if (Opts.MacroBacktraceLimit
389                        != DiagnosticOptions::DefaultMacroBacktraceLimit)
390    Res.push_back("-fmacro-backtrace-limit",
391                  llvm::utostr(Opts.MacroBacktraceLimit));
392  if (Opts.TemplateBacktraceLimit
393                        != DiagnosticOptions::DefaultTemplateBacktraceLimit)
394    Res.push_back("-ftemplate-backtrace-limit",
395                  llvm::utostr(Opts.TemplateBacktraceLimit));
396  if (Opts.ConstexprBacktraceLimit
397                        != DiagnosticOptions::DefaultConstexprBacktraceLimit)
398    Res.push_back("-fconstexpr-backtrace-limit",
399                  llvm::utostr(Opts.ConstexprBacktraceLimit));
400
401  if (Opts.TabStop != DiagnosticOptions::DefaultTabStop)
402    Res.push_back("-ftabstop", llvm::utostr(Opts.TabStop));
403  if (Opts.MessageLength)
404    Res.push_back("-fmessage-length", llvm::utostr(Opts.MessageLength));
405  if (!Opts.DumpBuildInformation.empty())
406    Res.push_back("-dump-build-information", Opts.DumpBuildInformation);
407  for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
408    Res.push_back("-W" + Opts.Warnings[i]);
409}
410
411static const char *getInputKindName(InputKind Kind) {
412  switch (Kind) {
413  case IK_None:              break;
414  case IK_AST:               return "ast";
415  case IK_Asm:               return "assembler-with-cpp";
416  case IK_C:                 return "c";
417  case IK_CXX:               return "c++";
418  case IK_LLVM_IR:           return "ir";
419  case IK_ObjC:              return "objective-c";
420  case IK_ObjCXX:            return "objective-c++";
421  case IK_OpenCL:            return "cl";
422  case IK_CUDA:              return "cuda";
423  case IK_PreprocessedC:     return "cpp-output";
424  case IK_PreprocessedCXX:   return "c++-cpp-output";
425  case IK_PreprocessedObjC:  return "objective-c-cpp-output";
426  case IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
427  }
428
429  llvm_unreachable("Unexpected language kind!");
430}
431
432static const char *getActionName(frontend::ActionKind Kind) {
433  switch (Kind) {
434  case frontend::PluginAction:
435    llvm_unreachable("Invalid kind!");
436
437  case frontend::ASTDeclList:            return "-ast-list";
438  case frontend::ASTDump:                return "-ast-dump";
439  case frontend::ASTDumpXML:             return "-ast-dump-xml";
440  case frontend::ASTPrint:               return "-ast-print";
441  case frontend::ASTView:                return "-ast-view";
442  case frontend::DumpRawTokens:          return "-dump-raw-tokens";
443  case frontend::DumpTokens:             return "-dump-tokens";
444  case frontend::EmitAssembly:           return "-S";
445  case frontend::EmitBC:                 return "-emit-llvm-bc";
446  case frontend::EmitHTML:               return "-emit-html";
447  case frontend::EmitLLVM:               return "-emit-llvm";
448  case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
449  case frontend::EmitCodeGenOnly:        return "-emit-codegen-only";
450  case frontend::EmitObj:                return "-emit-obj";
451  case frontend::FixIt:                  return "-fixit";
452  case frontend::GenerateModule:         return "-emit-module";
453  case frontend::GeneratePCH:            return "-emit-pch";
454  case frontend::GeneratePTH:            return "-emit-pth";
455  case frontend::InitOnly:               return "-init-only";
456  case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
457  case frontend::PrintDeclContext:       return "-print-decl-contexts";
458  case frontend::PrintPreamble:          return "-print-preamble";
459  case frontend::PrintPreprocessedInput: return "-E";
460  case frontend::RewriteMacros:          return "-rewrite-macros";
461  case frontend::RewriteObjC:            return "-rewrite-objc";
462  case frontend::RewriteTest:            return "-rewrite-test";
463  case frontend::RunAnalysis:            return "-analyze";
464  case frontend::MigrateSource:          return "-migrate";
465  case frontend::RunPreprocessorOnly:    return "-Eonly";
466  }
467
468  llvm_unreachable("Unexpected language kind!");
469}
470
471static void FileSystemOptsToArgs(const FileSystemOptions &Opts, ToArgsList &Res){
472  if (!Opts.WorkingDir.empty())
473    Res.push_back("-working-directory", Opts.WorkingDir);
474}
475
476static void CodeCompleteOptionsToArgs(const CodeCompleteOptions &Opts,
477                                      ToArgsList &Res) {
478  if (Opts.IncludeMacros)
479    Res.push_back("-code-completion-macros");
480  if (Opts.IncludeCodePatterns)
481    Res.push_back("-code-completion-patterns");
482  if (!Opts.IncludeGlobals)
483    Res.push_back("-no-code-completion-globals");
484  if (Opts.IncludeBriefComments)
485    Res.push_back("-code-completion-brief-comments");
486}
487
488static void FrontendOptsToArgs(const FrontendOptions &Opts, ToArgsList &Res) {
489  if (Opts.DisableFree)
490    Res.push_back("-disable-free");
491  if (Opts.RelocatablePCH)
492    Res.push_back("-relocatable-pch");
493  if (Opts.ShowHelp)
494    Res.push_back("-help");
495  if (Opts.ShowStats)
496    Res.push_back("-print-stats");
497  if (Opts.ShowTimers)
498    Res.push_back("-ftime-report");
499  if (Opts.ShowVersion)
500    Res.push_back("-version");
501  if (Opts.FixWhatYouCan)
502    Res.push_back("-fix-what-you-can");
503  if (Opts.FixOnlyWarnings)
504    Res.push_back("-fix-only-warnings");
505  if (Opts.FixAndRecompile)
506    Res.push_back("-fixit-recompile");
507  if (Opts.FixToTemporaries)
508    Res.push_back("-fixit-to-temporary");
509  switch (Opts.ARCMTAction) {
510  case FrontendOptions::ARCMT_None:
511    break;
512  case FrontendOptions::ARCMT_Check:
513    Res.push_back("-arcmt-check");
514    break;
515  case FrontendOptions::ARCMT_Modify:
516    Res.push_back("-arcmt-modify");
517    break;
518  case FrontendOptions::ARCMT_Migrate:
519    Res.push_back("-arcmt-migrate");
520    break;
521  }
522  CodeCompleteOptionsToArgs(Opts.CodeCompleteOpts, Res);
523  if (!Opts.MTMigrateDir.empty())
524    Res.push_back("-mt-migrate-directory", Opts.MTMigrateDir);
525  if (!Opts.ARCMTMigrateReportOut.empty())
526    Res.push_back("-arcmt-migrate-report-output", Opts.ARCMTMigrateReportOut);
527  if (Opts.ARCMTMigrateEmitARCErrors)
528    Res.push_back("-arcmt-migrate-emit-errors");
529
530  if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Literals)
531    Res.push_back("-objcmt-migrate-literals");
532  if (Opts.ObjCMTAction & ~FrontendOptions::ObjCMT_Subscripting)
533    Res.push_back("-objcmt-migrate-subscripting");
534
535  bool NeedLang = false;
536  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
537    if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].File) !=
538        Opts.Inputs[i].Kind)
539      NeedLang = true;
540  if (NeedLang)
541    Res.push_back("-x", getInputKindName(Opts.Inputs[0].Kind));
542  for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
543    assert((!NeedLang || Opts.Inputs[i].Kind == Opts.Inputs[0].Kind) &&
544           "Unable to represent this input vector!");
545    Res.push_back(Opts.Inputs[i].File);
546  }
547
548  if (!Opts.OutputFile.empty())
549    Res.push_back("-o", Opts.OutputFile);
550  if (!Opts.CodeCompletionAt.FileName.empty())
551    Res.push_back("-code-completion-at",
552                  Opts.CodeCompletionAt.FileName + ":" +
553                  llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
554                  llvm::utostr(Opts.CodeCompletionAt.Column));
555  if (Opts.ProgramAction != frontend::PluginAction)
556    Res.push_back(getActionName(Opts.ProgramAction));
557  if (!Opts.ActionName.empty()) {
558    Res.push_back("-plugin", Opts.ActionName);
559    for(unsigned i = 0, e = Opts.PluginArgs.size(); i != e; ++i)
560      Res.push_back("-plugin-arg-" + Opts.ActionName, Opts.PluginArgs[i]);
561  }
562  if (!Opts.ASTDumpFilter.empty())
563    Res.push_back("-ast-dump-filter", Opts.ASTDumpFilter);
564  for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i)
565    Res.push_back("-load", Opts.Plugins[i]);
566  for (unsigned i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
567    Res.push_back("-add-plugin", Opts.AddPluginActions[i]);
568    for(unsigned ai = 0, ae = Opts.AddPluginArgs.size(); ai != ae; ++ai)
569      Res.push_back("-plugin-arg-" + Opts.AddPluginActions[i],
570                    Opts.AddPluginArgs[i][ai]);
571  }
572  for (unsigned i = 0, e = Opts.ASTMergeFiles.size(); i != e; ++i)
573    Res.push_back("-ast-merge", Opts.ASTMergeFiles[i]);
574  for (unsigned i = 0, e = Opts.LLVMArgs.size(); i != e; ++i)
575    Res.push_back("-mllvm", Opts.LLVMArgs[i]);
576  if (!Opts.OverrideRecordLayoutsFile.empty())
577    Res.push_back("-foverride-record-layout=" + Opts.OverrideRecordLayoutsFile);
578}
579
580static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
581                                   ToArgsList &Res) {
582  if (Opts.Sysroot != "/") {
583    Res.push_back("-isysroot");
584    Res.push_back(Opts.Sysroot);
585  }
586
587  /// User specified include entries.
588  for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
589    const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
590    if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
591      llvm::report_fatal_error("Invalid option set!");
592    if (E.IsUserSupplied) {
593      switch (E.Group) {
594      case frontend::After:
595        Res.push_back("-idirafter");
596        break;
597
598      case frontend::Quoted:
599        Res.push_back("-iquote");
600        break;
601
602      case frontend::System:
603        Res.push_back("-isystem");
604        break;
605
606      case frontend::IndexHeaderMap:
607        Res.push_back("-index-header-map");
608        Res.push_back(E.IsFramework? "-F" : "-I");
609        break;
610
611      case frontend::CSystem:
612        Res.push_back("-c-isystem");
613        break;
614
615      case frontend::CXXSystem:
616        Res.push_back("-cxx-isystem");
617        break;
618
619      case frontend::ObjCSystem:
620        Res.push_back("-objc-isystem");
621        break;
622
623      case frontend::ObjCXXSystem:
624        Res.push_back("-objcxx-isystem");
625        break;
626
627      case frontend::Angled:
628        Res.push_back(E.IsFramework ? "-F" : "-I");
629        break;
630      }
631    } else {
632      if (E.IsInternal) {
633        assert(E.Group == frontend::System && "Unexpected header search group");
634        if (E.ImplicitExternC)
635          Res.push_back("-internal-externc-isystem");
636        else
637          Res.push_back("-internal-isystem");
638      } else {
639        if (E.Group != frontend::Angled && E.Group != frontend::System)
640          llvm::report_fatal_error("Invalid option set!");
641        Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
642                      "-iwithprefix");
643      }
644    }
645    Res.push_back(E.Path);
646  }
647
648  /// User-specified system header prefixes.
649  for (unsigned i = 0, e = Opts.SystemHeaderPrefixes.size(); i != e; ++i) {
650    if (Opts.SystemHeaderPrefixes[i].IsSystemHeader)
651      Res.push_back("-isystem-prefix");
652    else
653      Res.push_back("-ino-system-prefix");
654
655    Res.push_back(Opts.SystemHeaderPrefixes[i].Prefix);
656  }
657
658  if (!Opts.ResourceDir.empty())
659    Res.push_back("-resource-dir", Opts.ResourceDir);
660  if (!Opts.ModuleCachePath.empty())
661    Res.push_back("-fmodule-cache-path", Opts.ModuleCachePath);
662  if (!Opts.UseStandardSystemIncludes)
663    Res.push_back("-nostdsysteminc");
664  if (!Opts.UseStandardCXXIncludes)
665    Res.push_back("-nostdinc++");
666  if (Opts.UseLibcxx)
667    Res.push_back("-stdlib=libc++");
668  if (Opts.Verbose)
669    Res.push_back("-v");
670}
671
672static void LangOptsToArgs(const LangOptions &Opts, ToArgsList &Res) {
673  LangOptions DefaultLangOpts;
674
675  // FIXME: Need to set -std to get all the implicit options.
676
677  // FIXME: We want to only pass options relative to the defaults, which
678  // requires constructing a target. :(
679  //
680  // It would be better to push the all target specific choices into the driver,
681  // so that everything below that was more uniform.
682
683  if (Opts.Trigraphs)
684    Res.push_back("-trigraphs");
685  // Implicit based on the input kind:
686  //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
687  // Implicit based on the input language standard:
688  //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
689  if (Opts.DollarIdents)
690    Res.push_back("-fdollars-in-identifiers");
691  if (Opts.GNUMode && !Opts.GNUKeywords)
692    Res.push_back("-fno-gnu-keywords");
693  if (!Opts.GNUMode && Opts.GNUKeywords)
694    Res.push_back("-fgnu-keywords");
695  if (Opts.MicrosoftExt)
696    Res.push_back("-fms-extensions");
697  if (Opts.MicrosoftMode)
698    Res.push_back("-fms-compatibility");
699  if (Opts.MSCVersion != 0)
700    Res.push_back("-fmsc-version=" + llvm::utostr(Opts.MSCVersion));
701  if (Opts.Borland)
702    Res.push_back("-fborland-extensions");
703  if (Opts.ObjCDefaultSynthProperties)
704    Res.push_back("-fobjc-default-synthesize-properties");
705  // NoInline is implicit.
706  if (!Opts.CXXOperatorNames)
707    Res.push_back("-fno-operator-names");
708  if (Opts.PascalStrings)
709    Res.push_back("-fpascal-strings");
710  if (Opts.CatchUndefined)
711    Res.push_back("-fcatch-undefined-behavior");
712  if (Opts.AddressSanitizer)
713    Res.push_back("-faddress-sanitizer");
714  if (Opts.ThreadSanitizer)
715    Res.push_back("-fthread-sanitizer");
716  if (Opts.WritableStrings)
717    Res.push_back("-fwritable-strings");
718  if (Opts.ConstStrings)
719    Res.push_back("-fconst-strings");
720  if (!Opts.LaxVectorConversions)
721    Res.push_back("-fno-lax-vector-conversions");
722  if (Opts.AltiVec)
723    Res.push_back("-faltivec");
724  if (Opts.Exceptions)
725    Res.push_back("-fexceptions");
726  if (Opts.ObjCExceptions)
727    Res.push_back("-fobjc-exceptions");
728  if (Opts.CXXExceptions)
729    Res.push_back("-fcxx-exceptions");
730  if (Opts.SjLjExceptions)
731    Res.push_back("-fsjlj-exceptions");
732  if (Opts.TraditionalCPP)
733    Res.push_back("-traditional-cpp");
734  if (!Opts.RTTI)
735    Res.push_back("-fno-rtti");
736  if (Opts.MSBitfields)
737    Res.push_back("-mms-bitfields");
738  if (Opts.Freestanding)
739    Res.push_back("-ffreestanding");
740  if (Opts.NoBuiltin)
741    Res.push_back("-fno-builtin");
742  if (!Opts.AssumeSaneOperatorNew)
743    Res.push_back("-fno-assume-sane-operator-new");
744  if (!Opts.ThreadsafeStatics)
745    Res.push_back("-fno-threadsafe-statics");
746  if (Opts.POSIXThreads)
747    Res.push_back("-pthread");
748  if (Opts.Blocks)
749    Res.push_back("-fblocks");
750  if (Opts.BlocksRuntimeOptional)
751    Res.push_back("-fblocks-runtime-optional");
752  if (Opts.Modules)
753    Res.push_back("-fmodules");
754  if (Opts.EmitAllDecls)
755    Res.push_back("-femit-all-decls");
756  if (Opts.MathErrno)
757    Res.push_back("-fmath-errno");
758  switch (Opts.getSignedOverflowBehavior()) {
759  case LangOptions::SOB_Undefined: break;
760  case LangOptions::SOB_Defined:   Res.push_back("-fwrapv"); break;
761  case LangOptions::SOB_Trapping:
762    Res.push_back("-ftrapv");
763    if (!Opts.OverflowHandler.empty())
764      Res.push_back("-ftrapv-handler", Opts.OverflowHandler);
765    break;
766  }
767  switch (Opts.getFPContractMode()) {
768  case LangOptions::FPC_Off:  Res.push_back("-ffp-contract=off"); break;
769  case LangOptions::FPC_On:   Res.push_back("-ffp-contract=on"); break;
770  case LangOptions::FPC_Fast: Res.push_back("-ffp-contract=fast"); break;
771  }
772  if (Opts.HeinousExtensions)
773    Res.push_back("-fheinous-gnu-extensions");
774  // Optimize is implicit.
775  // OptimizeSize is implicit.
776  if (Opts.FastMath)
777    Res.push_back("-ffast-math");
778  if (Opts.Static)
779    Res.push_back("-static-define");
780  if (Opts.DumpRecordLayoutsSimple)
781    Res.push_back("-fdump-record-layouts-simple");
782  else if (Opts.DumpRecordLayouts)
783    Res.push_back("-fdump-record-layouts");
784  if (Opts.DumpVTableLayouts)
785    Res.push_back("-fdump-vtable-layouts");
786  if (Opts.NoBitFieldTypeAlign)
787    Res.push_back("-fno-bitfield-type-alignment");
788  if (Opts.PICLevel)
789    Res.push_back("-pic-level", llvm::utostr(Opts.PICLevel));
790  if (Opts.PIELevel)
791    Res.push_back("-pie-level", llvm::utostr(Opts.PIELevel));
792  if (Opts.ObjCGCBitmapPrint)
793    Res.push_back("-print-ivar-layout");
794  if (Opts.NoConstantCFStrings)
795    Res.push_back("-fno-constant-cfstrings");
796  if (!Opts.AccessControl)
797    Res.push_back("-fno-access-control");
798  if (!Opts.CharIsSigned)
799    Res.push_back("-fno-signed-char");
800  if (Opts.ShortWChar)
801    Res.push_back("-fshort-wchar");
802  if (!Opts.ElideConstructors)
803    Res.push_back("-fno-elide-constructors");
804  if (Opts.getGC() != LangOptions::NonGC) {
805    if (Opts.getGC() == LangOptions::HybridGC) {
806      Res.push_back("-fobjc-gc");
807    } else {
808      assert(Opts.getGC() == LangOptions::GCOnly && "Invalid GC mode!");
809      Res.push_back("-fobjc-gc-only");
810    }
811  }
812  Res.push_back("-fobjc-runtime=" + Opts.ObjCRuntime.getAsString());
813  if (Opts.ObjCAutoRefCount)
814    Res.push_back("-fobjc-arc");
815  if (Opts.ObjCARCWeak)
816    Res.push_back("-fobjc-runtime-has-weak");
817  if (!Opts.ObjCInferRelatedResultType)
818    Res.push_back("-fno-objc-infer-related-result-type");
819
820  if (Opts.AppleKext)
821    Res.push_back("-fapple-kext");
822
823  if (Opts.getVisibilityMode() != DefaultVisibility) {
824    Res.push_back("-fvisibility");
825    if (Opts.getVisibilityMode() == HiddenVisibility) {
826      Res.push_back("hidden");
827    } else {
828      assert(Opts.getVisibilityMode() == ProtectedVisibility &&
829             "Invalid visibility!");
830      Res.push_back("protected");
831    }
832  }
833  if (Opts.InlineVisibilityHidden)
834    Res.push_back("-fvisibility-inlines-hidden");
835
836  if (Opts.getStackProtector() != 0)
837    Res.push_back("-stack-protector", llvm::utostr(Opts.getStackProtector()));
838  if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth)
839    Res.push_back("-ftemplate-depth", llvm::utostr(Opts.InstantiationDepth));
840  if (Opts.ConstexprCallDepth != DefaultLangOpts.ConstexprCallDepth)
841    Res.push_back("-fconstexpr-depth", llvm::utostr(Opts.ConstexprCallDepth));
842  if (!Opts.ObjCConstantStringClass.empty())
843    Res.push_back("-fconstant-string-class", Opts.ObjCConstantStringClass);
844  if (Opts.FakeAddressSpaceMap)
845    Res.push_back("-ffake-address-space-map");
846  if (Opts.ParseUnknownAnytype)
847    Res.push_back("-funknown-anytype");
848  if (Opts.DebuggerSupport)
849    Res.push_back("-fdebugger-support");
850  if (Opts.DebuggerCastResultToId)
851    Res.push_back("-fdebugger-cast-result-to-id");
852  if (Opts.DebuggerObjCLiteral)
853    Res.push_back("-fdebugger-objc-literal");
854  if (Opts.DelayedTemplateParsing)
855    Res.push_back("-fdelayed-template-parsing");
856  if (Opts.Deprecated)
857    Res.push_back("-fdeprecated-macro");
858  if (Opts.ApplePragmaPack)
859    Res.push_back("-fapple-pragma-pack");
860  if (!Opts.CurrentModule.empty())
861    Res.push_back("-fmodule-name=" + Opts.CurrentModule);
862}
863
864static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
865                                   ToArgsList &Res) {
866  for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
867    Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
868                  Opts.Macros[i].first);
869  for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
870    // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
871    Res.push_back("-include", Opts.Includes[i]);
872  }
873  for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i)
874    Res.push_back("-imacros", Opts.MacroIncludes[i]);
875  if (!Opts.UsePredefines)
876    Res.push_back("-undef");
877  if (Opts.DetailedRecord)
878    Res.push_back("-detailed-preprocessing-record");
879  if (!Opts.ImplicitPCHInclude.empty())
880    Res.push_back("-include-pch", Opts.ImplicitPCHInclude);
881  if (!Opts.ImplicitPTHInclude.empty())
882    Res.push_back("-include-pth", Opts.ImplicitPTHInclude);
883  if (!Opts.TokenCache.empty()) {
884    if (Opts.ImplicitPTHInclude.empty())
885      Res.push_back("-token-cache", Opts.TokenCache);
886    else
887      assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
888             "Unsupported option combination!");
889  }
890  for (unsigned i = 0, e = Opts.ChainedIncludes.size(); i != e; ++i)
891    Res.push_back("-chain-include", Opts.ChainedIncludes[i]);
892  for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
893    Res.push_back("-remap-file", Opts.RemappedFiles[i].first + ";" +
894                                 Opts.RemappedFiles[i].second);
895  }
896}
897
898static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
899                                         ToArgsList &Res) {
900  if (!Opts.ShowCPP && !Opts.ShowMacros)
901    llvm::report_fatal_error("Invalid option combination!");
902
903  if (Opts.ShowCPP && Opts.ShowMacros)
904    Res.push_back("-dD");
905  else if (!Opts.ShowCPP && Opts.ShowMacros)
906    Res.push_back("-dM");
907
908  if (!Opts.ShowLineMarkers)
909    Res.push_back("-P");
910  if (Opts.ShowComments)
911    Res.push_back("-C");
912  if (Opts.ShowMacroComments)
913    Res.push_back("-CC");
914}
915
916static void TargetOptsToArgs(const TargetOptions &Opts,
917                             ToArgsList &Res) {
918  Res.push_back("-triple");
919  Res.push_back(Opts.Triple);
920  if (!Opts.CPU.empty())
921    Res.push_back("-target-cpu", Opts.CPU);
922  if (!Opts.ABI.empty())
923    Res.push_back("-target-abi", Opts.ABI);
924  if (!Opts.LinkerVersion.empty())
925    Res.push_back("-target-linker-version", Opts.LinkerVersion);
926  if (!Opts.CXXABI.empty())
927    Res.push_back("-cxx-abi", Opts.CXXABI);
928  for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i)
929    Res.push_back("-target-feature", Opts.Features[i]);
930}
931
932void CompilerInvocation::toArgs(std::vector<std::string> &Res) const {
933  ToArgsList List(Res);
934  AnalyzerOptsToArgs(getAnalyzerOpts(), List);
935  CodeGenOptsToArgs(getCodeGenOpts(), List);
936  DependencyOutputOptsToArgs(getDependencyOutputOpts(), List);
937  DiagnosticOptsToArgs(getDiagnosticOpts(), List);
938  FileSystemOptsToArgs(getFileSystemOpts(), List);
939  FrontendOptsToArgs(getFrontendOpts(), List);
940  HeaderSearchOptsToArgs(getHeaderSearchOpts(), List);
941  LangOptsToArgs(*getLangOpts(), List);
942  PreprocessorOptsToArgs(getPreprocessorOpts(), List);
943  PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), List);
944  TargetOptsToArgs(getTargetOpts(), List);
945}
946
947//===----------------------------------------------------------------------===//
948// Deserialization (to args)
949//===----------------------------------------------------------------------===//
950
951using namespace clang::driver;
952using namespace clang::driver::options;
953
954//
955
956static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
957                                     DiagnosticsEngine &Diags) {
958  unsigned DefaultOpt = 0;
959  if (IK == IK_OpenCL && !Args.hasArg(OPT_cl_opt_disable))
960    DefaultOpt = 2;
961
962  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
963    if (A->getOption().matches(options::OPT_O0))
964      return 0;
965
966    assert (A->getOption().matches(options::OPT_O));
967
968    llvm::StringRef S(A->getValue(Args));
969    if (S == "s" || S == "z" || S.empty())
970      return 2;
971
972    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
973  }
974
975  return DefaultOpt;
976}
977
978static unsigned getOptimizationLevelSize(ArgList &Args, InputKind IK,
979                                         DiagnosticsEngine &Diags) {
980  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
981    if (A->getOption().matches(options::OPT_O)) {
982      switch (A->getValue(Args)[0]) {
983      default:
984        return 0;
985      case 's':
986        return 1;
987      case 'z':
988        return 2;
989      }
990    }
991  }
992  return 0;
993}
994
995static void addWarningArgs(ArgList &Args, std::vector<std::string> &Warnings) {
996  for (arg_iterator I = Args.filtered_begin(OPT_W_Group),
997         E = Args.filtered_end(); I != E; ++I) {
998    Arg *A = *I;
999    // If the argument is a pure flag, add its name (minus the "-W" at the beginning)
1000    // to the warning list. Else, add its value (for the OPT_W case).
1001    if (A->getOption().getKind() == Option::FlagClass) {
1002      Warnings.push_back(A->getOption().getName().substr(2));
1003    } else {
1004      for (unsigned Idx = 0, End = A->getNumValues();
1005           Idx < End; ++Idx) {
1006        StringRef V = A->getValue(Args, Idx);
1007        // "-Wl," and such are not warning options.
1008        // FIXME: Should be handled by putting these in separate flags.
1009        if (V.startswith("l,") || V.startswith("a,") || V.startswith("p,"))
1010          continue;
1011
1012        Warnings.push_back(V);
1013      }
1014    }
1015  }
1016}
1017
1018static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
1019                              DiagnosticsEngine &Diags) {
1020  using namespace options;
1021  bool Success = true;
1022  if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
1023    StringRef Name = A->getValue(Args);
1024    AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
1025#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
1026      .Case(CMDFLAG, NAME##Model)
1027#include "clang/StaticAnalyzer/Analyses.def"
1028      .Default(NumStores);
1029    if (Value == NumStores) {
1030      Diags.Report(diag::err_drv_invalid_value)
1031        << A->getAsString(Args) << Name;
1032      Success = false;
1033    } else {
1034      Opts.AnalysisStoreOpt = Value;
1035    }
1036  }
1037
1038  if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
1039    StringRef Name = A->getValue(Args);
1040    AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
1041#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
1042      .Case(CMDFLAG, NAME##Model)
1043#include "clang/StaticAnalyzer/Analyses.def"
1044      .Default(NumConstraints);
1045    if (Value == NumConstraints) {
1046      Diags.Report(diag::err_drv_invalid_value)
1047        << A->getAsString(Args) << Name;
1048      Success = false;
1049    } else {
1050      Opts.AnalysisConstraintsOpt = Value;
1051    }
1052  }
1053
1054  if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
1055    StringRef Name = A->getValue(Args);
1056    AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
1057#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
1058      .Case(CMDFLAG, PD_##NAME)
1059#include "clang/StaticAnalyzer/Analyses.def"
1060      .Default(NUM_ANALYSIS_DIAG_CLIENTS);
1061    if (Value == NUM_ANALYSIS_DIAG_CLIENTS) {
1062      Diags.Report(diag::err_drv_invalid_value)
1063        << A->getAsString(Args) << Name;
1064      Success = false;
1065    } else {
1066      Opts.AnalysisDiagOpt = Value;
1067    }
1068  }
1069
1070  if (Arg *A = Args.getLastArg(OPT_analyzer_purge)) {
1071    StringRef Name = A->getValue(Args);
1072    AnalysisPurgeMode Value = llvm::StringSwitch<AnalysisPurgeMode>(Name)
1073#define ANALYSIS_PURGE(NAME, CMDFLAG, DESC) \
1074      .Case(CMDFLAG, NAME)
1075#include "clang/StaticAnalyzer/Analyses.def"
1076      .Default(NumPurgeModes);
1077    if (Value == NumPurgeModes) {
1078      Diags.Report(diag::err_drv_invalid_value)
1079        << A->getAsString(Args) << Name;
1080      Success = false;
1081    } else {
1082      Opts.AnalysisPurgeOpt = Value;
1083    }
1084  }
1085
1086  if (Arg *A = Args.getLastArg(OPT_analyzer_ipa)) {
1087    StringRef Name = A->getValue(Args);
1088    AnalysisIPAMode Value = llvm::StringSwitch<AnalysisIPAMode>(Name)
1089#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) \
1090      .Case(CMDFLAG, NAME)
1091#include "clang/StaticAnalyzer/Analyses.def"
1092      .Default(NumIPAModes);
1093    if (Value == NumIPAModes) {
1094      Diags.Report(diag::err_drv_invalid_value)
1095        << A->getAsString(Args) << Name;
1096      Success = false;
1097    } else {
1098      Opts.IPAMode = Value;
1099    }
1100  }
1101
1102  if (Arg *A = Args.getLastArg(OPT_analyzer_inlining_mode)) {
1103    StringRef Name = A->getValue(Args);
1104    AnalysisInliningMode Value = llvm::StringSwitch<AnalysisInliningMode>(Name)
1105#define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) \
1106      .Case(CMDFLAG, NAME)
1107#include "clang/StaticAnalyzer/Analyses.def"
1108      .Default(NumInliningModes);
1109    if (Value == NumInliningModes) {
1110      Diags.Report(diag::err_drv_invalid_value)
1111        << A->getAsString(Args) << Name;
1112      Success = false;
1113    } else {
1114      Opts.InliningMode = Value;
1115    }
1116  }
1117
1118  Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
1119  Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
1120  Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
1121  Opts.NoRetryExhausted = Args.hasArg(OPT_analyzer_disable_retry_exhausted);
1122  Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
1123  Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
1124  Opts.AnalyzeNestedBlocks =
1125    Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
1126  Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
1127  Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
1128  Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
1129  Opts.CFGAddImplicitDtors = Args.hasArg(OPT_analysis_CFGAddImplicitDtors);
1130  Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
1131  Opts.MaxNodes = Args.getLastArgIntValue(OPT_analyzer_max_nodes, 150000,Diags);
1132  Opts.MaxLoop = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
1133  Opts.eagerlyTrimExplodedGraph = !Args.hasArg(OPT_analyzer_no_eagerly_trim_egraph);
1134  Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
1135  Opts.InlineMaxStackDepth =
1136    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
1137                            Opts.InlineMaxStackDepth, Diags);
1138  Opts.InlineMaxFunctionSize =
1139    Args.getLastArgIntValue(OPT_analyzer_inline_max_function_size,
1140                            Opts.InlineMaxFunctionSize, Diags);
1141
1142  Opts.CheckersControlList.clear();
1143  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
1144                                             OPT_analyzer_disable_checker),
1145         ie = Args.filtered_end(); it != ie; ++it) {
1146    const Arg *A = *it;
1147    A->claim();
1148    bool enable = (A->getOption().getID() == OPT_analyzer_checker);
1149    // We can have a list of comma separated checker names, e.g:
1150    // '-analyzer-checker=cocoa,unix'
1151    StringRef checkerList = A->getValue(Args);
1152    SmallVector<StringRef, 4> checkers;
1153    checkerList.split(checkers, ",");
1154    for (unsigned i = 0, e = checkers.size(); i != e; ++i)
1155      Opts.CheckersControlList.push_back(std::make_pair(checkers[i], enable));
1156  }
1157
1158  // Go through the analyzer configuration options.
1159  for (arg_iterator it = Args.filtered_begin(OPT_analyzer_config),
1160       ie = Args.filtered_end(); it != ie; ++it) {
1161    const Arg *A = *it;
1162    A->claim();
1163    // We can have a list of comma separated config names, e.g:
1164    // '-analyzer-config key1=val1,key2=val2'
1165    StringRef configList = A->getValue(Args);
1166    SmallVector<StringRef, 4> configVals;
1167    configList.split(configVals, ",");
1168    for (unsigned i = 0, e = configVals.size(); i != e; ++i) {
1169      StringRef key, val;
1170      llvm::tie(key, val) = configVals[i].split("=");
1171      if (val.empty()) {
1172        Diags.Report(SourceLocation(),
1173                     diag::err_analyzer_config_no_value) << configVals[i];
1174        Success = false;
1175        break;
1176      }
1177      if (val.find('=') != StringRef::npos) {
1178        Diags.Report(SourceLocation(),
1179                     diag::err_analyzer_config_multiple_values)
1180          << configVals[i];
1181        Success = false;
1182        break;
1183      }
1184      Opts.Config[key] = val;
1185    }
1186  }
1187
1188  return Success;
1189}
1190
1191static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
1192  Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
1193  Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);
1194  return true;
1195}
1196
1197static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
1198                             DiagnosticsEngine &Diags) {
1199  using namespace options;
1200  bool Success = true;
1201
1202  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
1203  if (OptLevel > 3) {
1204    Diags.Report(diag::err_drv_invalid_value)
1205      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
1206    OptLevel = 3;
1207    Success = false;
1208  }
1209  Opts.OptimizationLevel = OptLevel;
1210
1211  // We must always run at least the always inlining pass.
1212  Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
1213    : CodeGenOptions::OnlyAlwaysInlining;
1214  // -fno-inline-functions overrides OptimizationLevel > 1.
1215  Opts.NoInline = Args.hasArg(OPT_fno_inline);
1216  Opts.Inlining = Args.hasArg(OPT_fno_inline_functions) ?
1217    CodeGenOptions::OnlyAlwaysInlining : Opts.Inlining;
1218
1219  if (Args.hasArg(OPT_gline_tables_only)) {
1220    Opts.DebugInfo = CodeGenOptions::DebugLineTablesOnly;
1221  } else if (Args.hasArg(OPT_g_Flag)) {
1222    if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
1223      Opts.DebugInfo = CodeGenOptions::LimitedDebugInfo;
1224    else
1225      Opts.DebugInfo = CodeGenOptions::FullDebugInfo;
1226  }
1227
1228  Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
1229  Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
1230  Opts.ForbidGuardVariables = Args.hasArg(OPT_fforbid_guard_variables);
1231  Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
1232    OPT_fuse_register_sized_bitfield_access);
1233  Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
1234  Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
1235  Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
1236  Opts.NoCommon = Args.hasArg(OPT_fno_common);
1237  Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
1238  Opts.OptimizeSize = getOptimizationLevelSize(Args, IK, Diags);
1239  Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
1240                            Args.hasArg(OPT_ffreestanding));
1241  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
1242                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
1243
1244  Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
1245  Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
1246  Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
1247  Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);
1248  Opts.CXXCtorDtorAliases = Args.hasArg(OPT_mconstructor_aliases);
1249  Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
1250  Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
1251  Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
1252  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
1253  Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
1254  Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
1255  Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
1256  Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
1257  Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
1258                       Args.hasArg(OPT_cl_finite_math_only)||
1259                       Args.hasArg(OPT_cl_fast_relaxed_math));
1260  Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
1261                       Args.hasArg(OPT_cl_finite_math_only)||
1262                       Args.hasArg(OPT_cl_fast_relaxed_math));
1263  Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
1264  Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
1265  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
1266  Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
1267  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
1268  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
1269  Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
1270  Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
1271  Opts.NoDwarf2CFIAsm = Args.hasArg(OPT_fno_dwarf2_cfi_asm);
1272  Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm);
1273  Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
1274  Opts.StrictEnums = Args.hasArg(OPT_fstrict_enums);
1275  Opts.UnsafeFPMath = Args.hasArg(OPT_menable_unsafe_fp_math) ||
1276                      Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
1277                      Args.hasArg(OPT_cl_fast_relaxed_math);
1278  Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
1279  Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
1280  Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
1281  Opts.BoundsChecking = Args.getLastArgIntValue(OPT_fbounds_checking_EQ, 0,
1282                                                Diags);
1283  Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
1284
1285  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
1286  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
1287
1288  Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
1289  Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
1290
1291  Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
1292  Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);
1293  Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
1294  Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
1295  Opts.EmitOpenCLArgMetadata = Args.hasArg(OPT_cl_kernel_arg_info);
1296  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
1297  Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
1298  Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
1299  Opts.SSPBufferSize =
1300    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
1301  Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
1302  if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
1303    StringRef Val = A->getValue(Args);
1304    Val.getAsInteger(10, Opts.StackAlignment);
1305  }
1306
1307  if (Arg *A = Args.getLastArg(OPT_fobjc_dispatch_method_EQ)) {
1308    StringRef Name = A->getValue(Args);
1309    unsigned Method = llvm::StringSwitch<unsigned>(Name)
1310      .Case("legacy", CodeGenOptions::Legacy)
1311      .Case("non-legacy", CodeGenOptions::NonLegacy)
1312      .Case("mixed", CodeGenOptions::Mixed)
1313      .Default(~0U);
1314    if (Method == ~0U) {
1315      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1316      Success = false;
1317    } else {
1318      Opts.ObjCDispatchMethod = Method;
1319    }
1320  }
1321
1322  if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
1323    StringRef Name = A->getValue(Args);
1324    unsigned Model = llvm::StringSwitch<unsigned>(Name)
1325        .Case("global-dynamic", CodeGenOptions::GeneralDynamicTLSModel)
1326        .Case("local-dynamic", CodeGenOptions::LocalDynamicTLSModel)
1327        .Case("initial-exec", CodeGenOptions::InitialExecTLSModel)
1328        .Case("local-exec", CodeGenOptions::LocalExecTLSModel)
1329        .Default(~0U);
1330    if (Model == ~0U) {
1331      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
1332      Success = false;
1333    } else {
1334      Opts.DefaultTLSModel = static_cast<CodeGenOptions::TLSModel>(Model);
1335    }
1336  }
1337
1338  return Success;
1339}
1340
1341static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
1342                                      ArgList &Args) {
1343  using namespace options;
1344  Opts.OutputFile = Args.getLastArgValue(OPT_dependency_file);
1345  Opts.Targets = Args.getAllArgValues(OPT_MT);
1346  Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
1347  Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
1348  Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
1349  Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
1350  Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
1351  Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
1352}
1353
1354bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
1355                                DiagnosticsEngine *Diags) {
1356  using namespace options;
1357  bool Success = true;
1358
1359  Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
1360  Opts.DiagnosticSerializationFile =
1361    Args.getLastArgValue(OPT_diagnostic_serialized_file);
1362  Opts.IgnoreWarnings = Args.hasArg(OPT_w);
1363  Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
1364  Opts.Pedantic = Args.hasArg(OPT_pedantic);
1365  Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
1366  Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
1367  Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
1368  Opts.ShowColumn = Args.hasFlag(OPT_fshow_column,
1369                                 OPT_fno_show_column,
1370                                 /*Default=*/true);
1371  Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
1372  Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
1373  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
1374
1375  // Default behavior is to not to show note include stacks.
1376  Opts.ShowNoteIncludeStack = false;
1377  if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
1378                               OPT_fno_diagnostics_show_note_include_stack))
1379    if (A->getOption().matches(OPT_fdiagnostics_show_note_include_stack))
1380      Opts.ShowNoteIncludeStack = true;
1381
1382  StringRef ShowOverloads =
1383    Args.getLastArgValue(OPT_fshow_overloads_EQ, "all");
1384  if (ShowOverloads == "best")
1385    Opts.ShowOverloads = DiagnosticsEngine::Ovl_Best;
1386  else if (ShowOverloads == "all")
1387    Opts.ShowOverloads = DiagnosticsEngine::Ovl_All;
1388  else {
1389    Success = false;
1390    if (Diags)
1391      Diags->Report(diag::err_drv_invalid_value)
1392      << Args.getLastArg(OPT_fshow_overloads_EQ)->getAsString(Args)
1393      << ShowOverloads;
1394  }
1395
1396  StringRef ShowCategory =
1397    Args.getLastArgValue(OPT_fdiagnostics_show_category, "none");
1398  if (ShowCategory == "none")
1399    Opts.ShowCategories = 0;
1400  else if (ShowCategory == "id")
1401    Opts.ShowCategories = 1;
1402  else if (ShowCategory == "name")
1403    Opts.ShowCategories = 2;
1404  else {
1405    Success = false;
1406    if (Diags)
1407      Diags->Report(diag::err_drv_invalid_value)
1408      << Args.getLastArg(OPT_fdiagnostics_show_category)->getAsString(Args)
1409      << ShowCategory;
1410  }
1411
1412  StringRef Format =
1413    Args.getLastArgValue(OPT_fdiagnostics_format, "clang");
1414  if (Format == "clang")
1415    Opts.Format = DiagnosticOptions::Clang;
1416  else if (Format == "msvc")
1417    Opts.Format = DiagnosticOptions::Msvc;
1418  else if (Format == "vi")
1419    Opts.Format = DiagnosticOptions::Vi;
1420  else {
1421    Success = false;
1422    if (Diags)
1423      Diags->Report(diag::err_drv_invalid_value)
1424      << Args.getLastArg(OPT_fdiagnostics_format)->getAsString(Args)
1425      << Format;
1426  }
1427
1428  Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
1429  Opts.ShowParseableFixits = Args.hasArg(OPT_fdiagnostics_parseable_fixits);
1430  Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
1431  Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
1432  Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
1433  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
1434  Opts.MacroBacktraceLimit
1435    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
1436                         DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
1437  Opts.TemplateBacktraceLimit
1438    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
1439                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
1440                         Diags);
1441  Opts.ConstexprBacktraceLimit
1442    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
1443                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
1444                         Diags);
1445  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
1446                                    DiagnosticOptions::DefaultTabStop, Diags);
1447  if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
1448    Opts.TabStop = DiagnosticOptions::DefaultTabStop;
1449    if (Diags)
1450      Diags->Report(diag::warn_ignoring_ftabstop_value)
1451      << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
1452  }
1453  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
1454  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
1455  addWarningArgs(Args, Opts.Warnings);
1456
1457  return Success;
1458}
1459
1460static void ParseFileSystemArgs(FileSystemOptions &Opts, ArgList &Args) {
1461  Opts.WorkingDir = Args.getLastArgValue(OPT_working_directory);
1462}
1463
1464static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
1465                                   DiagnosticsEngine &Diags) {
1466  using namespace options;
1467  Opts.ProgramAction = frontend::ParseSyntaxOnly;
1468  if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
1469    switch (A->getOption().getID()) {
1470    default:
1471      llvm_unreachable("Invalid option in group!");
1472    case OPT_ast_list:
1473      Opts.ProgramAction = frontend::ASTDeclList; break;
1474    case OPT_ast_dump:
1475      Opts.ProgramAction = frontend::ASTDump; break;
1476    case OPT_ast_dump_xml:
1477      Opts.ProgramAction = frontend::ASTDumpXML; break;
1478    case OPT_ast_print:
1479      Opts.ProgramAction = frontend::ASTPrint; break;
1480    case OPT_ast_view:
1481      Opts.ProgramAction = frontend::ASTView; break;
1482    case OPT_dump_raw_tokens:
1483      Opts.ProgramAction = frontend::DumpRawTokens; break;
1484    case OPT_dump_tokens:
1485      Opts.ProgramAction = frontend::DumpTokens; break;
1486    case OPT_S:
1487      Opts.ProgramAction = frontend::EmitAssembly; break;
1488    case OPT_emit_llvm_bc:
1489      Opts.ProgramAction = frontend::EmitBC; break;
1490    case OPT_emit_html:
1491      Opts.ProgramAction = frontend::EmitHTML; break;
1492    case OPT_emit_llvm:
1493      Opts.ProgramAction = frontend::EmitLLVM; break;
1494    case OPT_emit_llvm_only:
1495      Opts.ProgramAction = frontend::EmitLLVMOnly; break;
1496    case OPT_emit_codegen_only:
1497      Opts.ProgramAction = frontend::EmitCodeGenOnly; break;
1498    case OPT_emit_obj:
1499      Opts.ProgramAction = frontend::EmitObj; break;
1500    case OPT_fixit_EQ:
1501      Opts.FixItSuffix = A->getValue(Args);
1502      // fall-through!
1503    case OPT_fixit:
1504      Opts.ProgramAction = frontend::FixIt; break;
1505    case OPT_emit_module:
1506      Opts.ProgramAction = frontend::GenerateModule; break;
1507    case OPT_emit_pch:
1508      Opts.ProgramAction = frontend::GeneratePCH; break;
1509    case OPT_emit_pth:
1510      Opts.ProgramAction = frontend::GeneratePTH; break;
1511    case OPT_init_only:
1512      Opts.ProgramAction = frontend::InitOnly; break;
1513    case OPT_fsyntax_only:
1514      Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
1515    case OPT_print_decl_contexts:
1516      Opts.ProgramAction = frontend::PrintDeclContext; break;
1517    case OPT_print_preamble:
1518      Opts.ProgramAction = frontend::PrintPreamble; break;
1519    case OPT_E:
1520      Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
1521    case OPT_rewrite_macros:
1522      Opts.ProgramAction = frontend::RewriteMacros; break;
1523    case OPT_rewrite_objc:
1524      Opts.ProgramAction = frontend::RewriteObjC; break;
1525    case OPT_rewrite_test:
1526      Opts.ProgramAction = frontend::RewriteTest; break;
1527    case OPT_analyze:
1528      Opts.ProgramAction = frontend::RunAnalysis; break;
1529    case OPT_migrate:
1530      Opts.ProgramAction = frontend::MigrateSource; break;
1531    case OPT_Eonly:
1532      Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
1533    }
1534  }
1535
1536  if (const Arg* A = Args.getLastArg(OPT_plugin)) {
1537    Opts.Plugins.push_back(A->getValue(Args,0));
1538    Opts.ProgramAction = frontend::PluginAction;
1539    Opts.ActionName = A->getValue(Args);
1540
1541    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1542           end = Args.filtered_end(); it != end; ++it) {
1543      if ((*it)->getValue(Args, 0) == Opts.ActionName)
1544        Opts.PluginArgs.push_back((*it)->getValue(Args, 1));
1545    }
1546  }
1547
1548  Opts.AddPluginActions = Args.getAllArgValues(OPT_add_plugin);
1549  Opts.AddPluginArgs.resize(Opts.AddPluginActions.size());
1550  for (int i = 0, e = Opts.AddPluginActions.size(); i != e; ++i) {
1551    for (arg_iterator it = Args.filtered_begin(OPT_plugin_arg),
1552           end = Args.filtered_end(); it != end; ++it) {
1553      if ((*it)->getValue(Args, 0) == Opts.AddPluginActions[i])
1554        Opts.AddPluginArgs[i].push_back((*it)->getValue(Args, 1));
1555    }
1556  }
1557
1558  if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
1559    Opts.CodeCompletionAt =
1560      ParsedSourceLocation::FromString(A->getValue(Args));
1561    if (Opts.CodeCompletionAt.FileName.empty())
1562      Diags.Report(diag::err_drv_invalid_value)
1563        << A->getAsString(Args) << A->getValue(Args);
1564  }
1565  Opts.DisableFree = Args.hasArg(OPT_disable_free);
1566
1567  Opts.OutputFile = Args.getLastArgValue(OPT_o);
1568  Opts.Plugins = Args.getAllArgValues(OPT_load);
1569  Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
1570  Opts.ShowHelp = Args.hasArg(OPT_help);
1571  Opts.ShowStats = Args.hasArg(OPT_print_stats);
1572  Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
1573  Opts.ShowVersion = Args.hasArg(OPT_version);
1574  Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge);
1575  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
1576  Opts.FixWhatYouCan = Args.hasArg(OPT_fix_what_you_can);
1577  Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
1578  Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
1579  Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
1580  Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
1581
1582  Opts.CodeCompleteOpts.IncludeMacros
1583    = Args.hasArg(OPT_code_completion_macros);
1584  Opts.CodeCompleteOpts.IncludeCodePatterns
1585    = Args.hasArg(OPT_code_completion_patterns);
1586  Opts.CodeCompleteOpts.IncludeGlobals
1587    = !Args.hasArg(OPT_no_code_completion_globals);
1588  Opts.CodeCompleteOpts.IncludeBriefComments
1589    = Args.hasArg(OPT_code_completion_brief_comments);
1590
1591  Opts.OverrideRecordLayoutsFile
1592    = Args.getLastArgValue(OPT_foverride_record_layout_EQ);
1593  if (const Arg *A = Args.getLastArg(OPT_arcmt_check,
1594                                     OPT_arcmt_modify,
1595                                     OPT_arcmt_migrate)) {
1596    switch (A->getOption().getID()) {
1597    default:
1598      llvm_unreachable("missed a case");
1599    case OPT_arcmt_check:
1600      Opts.ARCMTAction = FrontendOptions::ARCMT_Check;
1601      break;
1602    case OPT_arcmt_modify:
1603      Opts.ARCMTAction = FrontendOptions::ARCMT_Modify;
1604      break;
1605    case OPT_arcmt_migrate:
1606      Opts.ARCMTAction = FrontendOptions::ARCMT_Migrate;
1607      break;
1608    }
1609  }
1610  Opts.MTMigrateDir = Args.getLastArgValue(OPT_mt_migrate_directory);
1611  Opts.ARCMTMigrateReportOut
1612    = Args.getLastArgValue(OPT_arcmt_migrate_report_output);
1613  Opts.ARCMTMigrateEmitARCErrors
1614    = Args.hasArg(OPT_arcmt_migrate_emit_arc_errors);
1615
1616  if (Args.hasArg(OPT_objcmt_migrate_literals))
1617    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
1618  if (Args.hasArg(OPT_objcmt_migrate_subscripting))
1619    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
1620
1621  if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
1622      Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
1623    Diags.Report(diag::err_drv_argument_not_allowed_with)
1624      << "ARC migration" << "ObjC migration";
1625  }
1626
1627  InputKind DashX = IK_None;
1628  if (const Arg *A = Args.getLastArg(OPT_x)) {
1629    DashX = llvm::StringSwitch<InputKind>(A->getValue(Args))
1630      .Case("c", IK_C)
1631      .Case("cl", IK_OpenCL)
1632      .Case("cuda", IK_CUDA)
1633      .Case("c++", IK_CXX)
1634      .Case("objective-c", IK_ObjC)
1635      .Case("objective-c++", IK_ObjCXX)
1636      .Case("cpp-output", IK_PreprocessedC)
1637      .Case("assembler-with-cpp", IK_Asm)
1638      .Case("c++-cpp-output", IK_PreprocessedCXX)
1639      .Case("objective-c-cpp-output", IK_PreprocessedObjC)
1640      .Case("objc-cpp-output", IK_PreprocessedObjC)
1641      .Case("objective-c++-cpp-output", IK_PreprocessedObjCXX)
1642      .Case("objc++-cpp-output", IK_PreprocessedObjCXX)
1643      .Case("c-header", IK_C)
1644      .Case("cl-header", IK_OpenCL)
1645      .Case("objective-c-header", IK_ObjC)
1646      .Case("c++-header", IK_CXX)
1647      .Case("objective-c++-header", IK_ObjCXX)
1648      .Case("ast", IK_AST)
1649      .Case("ir", IK_LLVM_IR)
1650      .Default(IK_None);
1651    if (DashX == IK_None)
1652      Diags.Report(diag::err_drv_invalid_value)
1653        << A->getAsString(Args) << A->getValue(Args);
1654  }
1655
1656  // '-' is the default input if none is given.
1657  std::vector<std::string> Inputs = Args.getAllArgValues(OPT_INPUT);
1658  Opts.Inputs.clear();
1659  if (Inputs.empty())
1660    Inputs.push_back("-");
1661  for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
1662    InputKind IK = DashX;
1663    if (IK == IK_None) {
1664      IK = FrontendOptions::getInputKindForExtension(
1665        StringRef(Inputs[i]).rsplit('.').second);
1666      // FIXME: Remove this hack.
1667      if (i == 0)
1668        DashX = IK;
1669    }
1670    Opts.Inputs.push_back(FrontendInputFile(Inputs[i], IK));
1671  }
1672
1673  return DashX;
1674}
1675
1676std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
1677                                                 void *MainAddr) {
1678  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
1679
1680  if (!P.isEmpty()) {
1681    P.eraseComponent();  // Remove /clang from foo/bin/clang
1682    P.eraseComponent();  // Remove /bin   from foo/bin
1683
1684    // Get foo/lib/clang/<version>/include
1685    P.appendComponent("lib");
1686    P.appendComponent("clang");
1687    P.appendComponent(CLANG_VERSION_STRING);
1688  }
1689
1690  return P.str();
1691}
1692
1693static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
1694  using namespace options;
1695  Opts.Sysroot = Args.getLastArgValue(OPT_isysroot, "/");
1696  Opts.Verbose = Args.hasArg(OPT_v);
1697  Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
1698  Opts.UseStandardSystemIncludes = !Args.hasArg(OPT_nostdsysteminc);
1699  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
1700  if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
1701    Opts.UseLibcxx = (strcmp(A->getValue(Args), "libc++") == 0);
1702  Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
1703  Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodule_cache_path);
1704  Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
1705
1706  // Add -I..., -F..., and -index-header-map options in order.
1707  bool IsIndexHeaderMap = false;
1708  for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F,
1709                                             OPT_index_header_map),
1710       ie = Args.filtered_end(); it != ie; ++it) {
1711    if ((*it)->getOption().matches(OPT_index_header_map)) {
1712      // -index-header-map applies to the next -I or -F.
1713      IsIndexHeaderMap = true;
1714      continue;
1715    }
1716
1717    frontend::IncludeDirGroup Group
1718      = IsIndexHeaderMap? frontend::IndexHeaderMap : frontend::Angled;
1719
1720    Opts.AddPath((*it)->getValue(Args), Group, true,
1721                 /*IsFramework=*/ (*it)->getOption().matches(OPT_F), false);
1722    IsIndexHeaderMap = false;
1723  }
1724
1725  // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
1726  StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
1727  for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
1728                                             OPT_iwithprefixbefore),
1729         ie = Args.filtered_end(); it != ie; ++it) {
1730    const Arg *A = *it;
1731    if (A->getOption().matches(OPT_iprefix))
1732      Prefix = A->getValue(Args);
1733    else if (A->getOption().matches(OPT_iwithprefix))
1734      Opts.AddPath(Prefix.str() + A->getValue(Args),
1735                   frontend::System, false, false, false);
1736    else
1737      Opts.AddPath(Prefix.str() + A->getValue(Args),
1738                   frontend::Angled, false, false, false);
1739  }
1740
1741  for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1742         ie = Args.filtered_end(); it != ie; ++it)
1743    Opts.AddPath((*it)->getValue(Args), frontend::After, true, false, false);
1744  for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1745         ie = Args.filtered_end(); it != ie; ++it)
1746    Opts.AddPath((*it)->getValue(Args), frontend::Quoted, true, false, false);
1747  for (arg_iterator it = Args.filtered_begin(OPT_isystem,
1748         OPT_iwithsysroot), ie = Args.filtered_end(); it != ie; ++it)
1749    Opts.AddPath((*it)->getValue(Args), frontend::System, true, false,
1750                 !(*it)->getOption().matches(OPT_iwithsysroot));
1751  for (arg_iterator it = Args.filtered_begin(OPT_iframework),
1752         ie = Args.filtered_end(); it != ie; ++it)
1753    Opts.AddPath((*it)->getValue(Args), frontend::System, true, true,
1754                 true);
1755
1756  // Add the paths for the various language specific isystem flags.
1757  for (arg_iterator it = Args.filtered_begin(OPT_c_isystem),
1758       ie = Args.filtered_end(); it != ie; ++it)
1759    Opts.AddPath((*it)->getValue(Args), frontend::CSystem, true, false, true);
1760  for (arg_iterator it = Args.filtered_begin(OPT_cxx_isystem),
1761       ie = Args.filtered_end(); it != ie; ++it)
1762    Opts.AddPath((*it)->getValue(Args), frontend::CXXSystem, true, false, true);
1763  for (arg_iterator it = Args.filtered_begin(OPT_objc_isystem),
1764       ie = Args.filtered_end(); it != ie; ++it)
1765    Opts.AddPath((*it)->getValue(Args), frontend::ObjCSystem, true, false,true);
1766  for (arg_iterator it = Args.filtered_begin(OPT_objcxx_isystem),
1767       ie = Args.filtered_end(); it != ie; ++it)
1768    Opts.AddPath((*it)->getValue(Args), frontend::ObjCXXSystem, true, false,
1769                 true);
1770
1771  // Add the internal paths from a driver that detects standard include paths.
1772  for (arg_iterator I = Args.filtered_begin(OPT_internal_isystem,
1773                                            OPT_internal_externc_isystem),
1774                    E = Args.filtered_end();
1775       I != E; ++I)
1776    Opts.AddPath((*I)->getValue(Args), frontend::System,
1777                 false, false, /*IgnoreSysRoot=*/true, /*IsInternal=*/true,
1778                 (*I)->getOption().matches(OPT_internal_externc_isystem));
1779
1780  // Add the path prefixes which are implicitly treated as being system headers.
1781  for (arg_iterator I = Args.filtered_begin(OPT_isystem_prefix,
1782                                            OPT_ino_system_prefix),
1783                    E = Args.filtered_end();
1784       I != E; ++I)
1785    Opts.AddSystemHeaderPrefix((*I)->getValue(Args),
1786                               (*I)->getOption().matches(OPT_isystem_prefix));
1787}
1788
1789void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
1790                                         LangStandard::Kind LangStd) {
1791  // Set some properties which depend solely on the input kind; it would be nice
1792  // to move these to the language standard, and have the driver resolve the
1793  // input kind + language standard.
1794  if (IK == IK_Asm) {
1795    Opts.AsmPreprocessor = 1;
1796  } else if (IK == IK_ObjC ||
1797             IK == IK_ObjCXX ||
1798             IK == IK_PreprocessedObjC ||
1799             IK == IK_PreprocessedObjCXX) {
1800    Opts.ObjC1 = Opts.ObjC2 = 1;
1801  }
1802
1803  if (LangStd == LangStandard::lang_unspecified) {
1804    // Based on the base language, pick one.
1805    switch (IK) {
1806    case IK_None:
1807    case IK_AST:
1808    case IK_LLVM_IR:
1809      llvm_unreachable("Invalid input kind!");
1810    case IK_OpenCL:
1811      LangStd = LangStandard::lang_opencl;
1812      break;
1813    case IK_CUDA:
1814      LangStd = LangStandard::lang_cuda;
1815      break;
1816    case IK_Asm:
1817    case IK_C:
1818    case IK_PreprocessedC:
1819    case IK_ObjC:
1820    case IK_PreprocessedObjC:
1821      LangStd = LangStandard::lang_gnu99;
1822      break;
1823    case IK_CXX:
1824    case IK_PreprocessedCXX:
1825    case IK_ObjCXX:
1826    case IK_PreprocessedObjCXX:
1827      LangStd = LangStandard::lang_gnucxx98;
1828      break;
1829    }
1830  }
1831
1832  const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1833  Opts.BCPLComment = Std.hasBCPLComments();
1834  Opts.C99 = Std.isC99();
1835  Opts.C11 = Std.isC11();
1836  Opts.CPlusPlus = Std.isCPlusPlus();
1837  Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1838  Opts.Digraphs = Std.hasDigraphs();
1839  Opts.GNUMode = Std.isGNUMode();
1840  Opts.GNUInline = !Std.isC99();
1841  Opts.HexFloats = Std.hasHexFloats();
1842  Opts.ImplicitInt = Std.hasImplicitInt();
1843
1844  // Set OpenCL Version.
1845  if (LangStd == LangStandard::lang_opencl) {
1846    Opts.OpenCL = 1;
1847    Opts.OpenCLVersion = 100;
1848  }
1849  else if (LangStd == LangStandard::lang_opencl11) {
1850      Opts.OpenCL = 1;
1851      Opts.OpenCLVersion = 110;
1852  }
1853  else if (LangStd == LangStandard::lang_opencl12) {
1854    Opts.OpenCL = 1;
1855    Opts.OpenCLVersion = 120;
1856  }
1857
1858  // OpenCL has some additional defaults.
1859  if (Opts.OpenCL) {
1860    Opts.AltiVec = 0;
1861    Opts.CXXOperatorNames = 1;
1862    Opts.LaxVectorConversions = 0;
1863    Opts.DefaultFPContract = 1;
1864  }
1865
1866  if (LangStd == LangStandard::lang_cuda)
1867    Opts.CUDA = 1;
1868
1869  // OpenCL and C++ both have bool, true, false keywords.
1870  Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1871
1872  Opts.GNUKeywords = Opts.GNUMode;
1873  Opts.CXXOperatorNames = Opts.CPlusPlus;
1874
1875  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1876  // is specified, or -std is set to a conforming mode.
1877  Opts.Trigraphs = !Opts.GNUMode;
1878
1879  Opts.DollarIdents = !Opts.AsmPreprocessor;
1880}
1881
1882static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
1883                          DiagnosticsEngine &Diags) {
1884  // FIXME: Cleanup per-file based stuff.
1885  LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1886  if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1887    LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1888#define LANGSTANDARD(id, name, desc, features) \
1889      .Case(name, LangStandard::lang_##id)
1890#include "clang/Frontend/LangStandards.def"
1891      .Default(LangStandard::lang_unspecified);
1892    if (LangStd == LangStandard::lang_unspecified)
1893      Diags.Report(diag::err_drv_invalid_value)
1894        << A->getAsString(Args) << A->getValue(Args);
1895    else {
1896      // Valid standard, check to make sure language and standard are compatable.
1897      const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1898      switch (IK) {
1899      case IK_C:
1900      case IK_ObjC:
1901      case IK_PreprocessedC:
1902      case IK_PreprocessedObjC:
1903        if (!(Std.isC89() || Std.isC99()))
1904          Diags.Report(diag::err_drv_argument_not_allowed_with)
1905            << A->getAsString(Args) << "C/ObjC";
1906        break;
1907      case IK_CXX:
1908      case IK_ObjCXX:
1909      case IK_PreprocessedCXX:
1910      case IK_PreprocessedObjCXX:
1911        if (!Std.isCPlusPlus())
1912          Diags.Report(diag::err_drv_argument_not_allowed_with)
1913            << A->getAsString(Args) << "C++/ObjC++";
1914        break;
1915      case IK_OpenCL:
1916        if (!Std.isC99())
1917          Diags.Report(diag::err_drv_argument_not_allowed_with)
1918            << A->getAsString(Args) << "OpenCL";
1919        break;
1920      case IK_CUDA:
1921        if (!Std.isCPlusPlus())
1922          Diags.Report(diag::err_drv_argument_not_allowed_with)
1923            << A->getAsString(Args) << "CUDA";
1924        break;
1925      default:
1926        break;
1927      }
1928    }
1929  }
1930
1931  // -cl-std only applies for OpenCL language standards.
1932  // Override the -std option in this case.
1933  if (const Arg *A = Args.getLastArg(OPT_cl_std_EQ)) {
1934    LangStandard::Kind OpenCLLangStd
1935    = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1936    .Case("CL", LangStandard::lang_opencl)
1937    .Case("CL1.1", LangStandard::lang_opencl11)
1938    .Case("CL1.2", LangStandard::lang_opencl12)
1939    .Default(LangStandard::lang_unspecified);
1940
1941    if (OpenCLLangStd == LangStandard::lang_unspecified) {
1942      Diags.Report(diag::err_drv_invalid_value)
1943      << A->getAsString(Args) << A->getValue(Args);
1944    }
1945    else
1946      LangStd = OpenCLLangStd;
1947  }
1948
1949  CompilerInvocation::setLangDefaults(Opts, IK, LangStd);
1950
1951  // We abuse '-f[no-]gnu-keywords' to force overriding all GNU-extension
1952  // keywords. This behavior is provided by GCC's poorly named '-fasm' flag,
1953  // while a subset (the non-C++ GNU keywords) is provided by GCC's
1954  // '-fgnu-keywords'. Clang conflates the two for simplicity under the single
1955  // name, as it doesn't seem a useful distinction.
1956  Opts.GNUKeywords = Args.hasFlag(OPT_fgnu_keywords, OPT_fno_gnu_keywords,
1957                                  Opts.GNUKeywords);
1958
1959  if (Args.hasArg(OPT_fno_operator_names))
1960    Opts.CXXOperatorNames = 0;
1961
1962  if (Opts.ObjC1) {
1963    if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
1964      StringRef value = arg->getValue(Args);
1965      if (Opts.ObjCRuntime.tryParse(value))
1966        Diags.Report(diag::err_drv_unknown_objc_runtime) << value;
1967    }
1968
1969    if (Args.hasArg(OPT_fobjc_gc_only))
1970      Opts.setGC(LangOptions::GCOnly);
1971    else if (Args.hasArg(OPT_fobjc_gc))
1972      Opts.setGC(LangOptions::HybridGC);
1973    else if (Args.hasArg(OPT_fobjc_arc)) {
1974      Opts.ObjCAutoRefCount = 1;
1975      if (!Opts.ObjCRuntime.allowsARC())
1976        Diags.Report(diag::err_arc_unsupported_on_runtime);
1977
1978      // Only set ObjCARCWeak if ARC is enabled.
1979      if (Args.hasArg(OPT_fobjc_runtime_has_weak))
1980        Opts.ObjCARCWeak = 1;
1981      else
1982        Opts.ObjCARCWeak = Opts.ObjCRuntime.allowsWeak();
1983    }
1984
1985    if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
1986      Opts.ObjCInferRelatedResultType = 0;
1987  }
1988
1989  if (Args.hasArg(OPT_fgnu89_inline))
1990    Opts.GNUInline = 1;
1991
1992  if (Args.hasArg(OPT_fapple_kext)) {
1993    if (!Opts.CPlusPlus)
1994      Diags.Report(diag::warn_c_kext);
1995    else
1996      Opts.AppleKext = 1;
1997  }
1998
1999  if (Args.hasArg(OPT_print_ivar_layout))
2000    Opts.ObjCGCBitmapPrint = 1;
2001  if (Args.hasArg(OPT_fno_constant_cfstrings))
2002    Opts.NoConstantCFStrings = 1;
2003
2004  if (Args.hasArg(OPT_faltivec))
2005    Opts.AltiVec = 1;
2006
2007  if (Args.hasArg(OPT_pthread))
2008    Opts.POSIXThreads = 1;
2009
2010  if (Args.hasArg(OPT_fdelayed_template_parsing))
2011    Opts.DelayedTemplateParsing = 1;
2012
2013  StringRef Vis = Args.getLastArgValue(OPT_fvisibility, "default");
2014  if (Vis == "default")
2015    Opts.setVisibilityMode(DefaultVisibility);
2016  else if (Vis == "hidden")
2017    Opts.setVisibilityMode(HiddenVisibility);
2018  else if (Vis == "protected")
2019    // FIXME: diagnose if target does not support protected visibility
2020    Opts.setVisibilityMode(ProtectedVisibility);
2021  else
2022    Diags.Report(diag::err_drv_invalid_value)
2023      << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
2024
2025  if (Arg *A = Args.getLastArg(OPT_ffp_contract)) {
2026    StringRef Val = A->getValue(Args);
2027    if (Val == "fast")
2028      Opts.setFPContractMode(LangOptions::FPC_Fast);
2029    else if (Val == "on")
2030      Opts.setFPContractMode(LangOptions::FPC_On);
2031    else if (Val == "off")
2032      Opts.setFPContractMode(LangOptions::FPC_Off);
2033    else
2034      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
2035  }
2036
2037  if (Args.hasArg(OPT_fvisibility_inlines_hidden))
2038    Opts.InlineVisibilityHidden = 1;
2039
2040  if (Args.hasArg(OPT_ftrapv)) {
2041    Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
2042    // Set the handler, if one is specified.
2043    Opts.OverflowHandler =
2044        Args.getLastArgValue(OPT_ftrapv_handler);
2045  }
2046  else if (Args.hasArg(OPT_fwrapv))
2047    Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
2048
2049  if (Args.hasArg(OPT_trigraphs))
2050    Opts.Trigraphs = 1;
2051
2052  Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
2053                                   OPT_fno_dollars_in_identifiers,
2054                                   Opts.DollarIdents);
2055  Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
2056  Opts.MicrosoftExt
2057    = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
2058  Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
2059  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
2060  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
2061  Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
2062  Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
2063                                   Opts.ConstStrings);
2064  if (Args.hasArg(OPT_fno_lax_vector_conversions))
2065    Opts.LaxVectorConversions = 0;
2066  if (Args.hasArg(OPT_fno_threadsafe_statics))
2067    Opts.ThreadsafeStatics = 0;
2068  Opts.Exceptions = Args.hasArg(OPT_fexceptions);
2069  Opts.ObjCExceptions = Args.hasArg(OPT_fobjc_exceptions);
2070  Opts.CXXExceptions = Args.hasArg(OPT_fcxx_exceptions);
2071  Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
2072  Opts.TraditionalCPP = Args.hasArg(OPT_traditional_cpp);
2073
2074  Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
2075  Opts.Blocks = Args.hasArg(OPT_fblocks);
2076  Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
2077  Opts.Modules = Args.hasArg(OPT_fmodules);
2078  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
2079  Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
2080  Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
2081  Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
2082  Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
2083  Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
2084  Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
2085  Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
2086  Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
2087  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
2088  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 512,
2089                                                    Diags);
2090  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
2091                                                    Diags);
2092  Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
2093  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
2094                                                    0, Diags);
2095  Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
2096  Opts.ObjCConstantStringClass =
2097    Args.getLastArgValue(OPT_fconstant_string_class);
2098  Opts.ObjCDefaultSynthProperties =
2099    Args.hasArg(OPT_fobjc_default_synthesize_properties);
2100  Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
2101  Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
2102  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
2103  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
2104  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
2105  Opts.Static = Args.hasArg(OPT_static_define);
2106  Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
2107  Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple
2108                        || Args.hasArg(OPT_fdump_record_layouts);
2109  Opts.DumpVTableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
2110  Opts.SpellChecking = !Args.hasArg(OPT_fno_spell_checking);
2111  Opts.NoBitFieldTypeAlign = Args.hasArg(OPT_fno_bitfield_type_align);
2112  Opts.SinglePrecisionConstants = Args.hasArg(OPT_cl_single_precision_constant);
2113  Opts.FastRelaxedMath = Args.hasArg(OPT_cl_fast_relaxed_math);
2114  Opts.MRTD = Args.hasArg(OPT_mrtd);
2115  Opts.HexagonQdsp6Compat = Args.hasArg(OPT_mqdsp6_compat);
2116  Opts.FakeAddressSpaceMap = Args.hasArg(OPT_ffake_address_space_map);
2117  Opts.ParseUnknownAnytype = Args.hasArg(OPT_funknown_anytype);
2118  Opts.DebuggerSupport = Args.hasArg(OPT_fdebugger_support);
2119  Opts.DebuggerCastResultToId = Args.hasArg(OPT_fdebugger_cast_result_to_id);
2120  Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
2121  Opts.AddressSanitizer = Args.hasArg(OPT_faddress_sanitizer);
2122  Opts.ThreadSanitizer = Args.hasArg(OPT_fthread_sanitizer);
2123  Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
2124  Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
2125
2126  // Record whether the __DEPRECATED define was requested.
2127  Opts.Deprecated = Args.hasFlag(OPT_fdeprecated_macro,
2128                                 OPT_fno_deprecated_macro,
2129                                 Opts.Deprecated);
2130
2131  // FIXME: Eliminate this dependency.
2132  unsigned Opt = getOptimizationLevel(Args, IK, Diags),
2133       OptSize = getOptimizationLevelSize(Args, IK, Diags);
2134  Opts.Optimize = Opt != 0;
2135  Opts.OptimizeSize = OptSize != 0;
2136
2137  // This is the __NO_INLINE__ define, which just depends on things like the
2138  // optimization level and -fno-inline, not actually whether the backend has
2139  // inlining enabled.
2140  Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
2141
2142  Opts.FastMath = Args.hasArg(OPT_ffast_math);
2143  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
2144
2145  Opts.EmitMicrosoftInlineAsm = Args.hasArg(OPT_fenable_experimental_ms_inline_asm);
2146
2147  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
2148  switch (SSP) {
2149  default:
2150    Diags.Report(diag::err_drv_invalid_value)
2151      << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
2152    break;
2153  case 0: Opts.setStackProtector(LangOptions::SSPOff); break;
2154  case 1: Opts.setStackProtector(LangOptions::SSPOn);  break;
2155  case 2: Opts.setStackProtector(LangOptions::SSPReq); break;
2156  }
2157}
2158
2159static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
2160                                  FileManager &FileMgr,
2161                                  DiagnosticsEngine &Diags) {
2162  using namespace options;
2163  Opts.ImplicitPCHInclude = Args.getLastArgValue(OPT_include_pch);
2164  Opts.ImplicitPTHInclude = Args.getLastArgValue(OPT_include_pth);
2165  if (const Arg *A = Args.getLastArg(OPT_token_cache))
2166      Opts.TokenCache = A->getValue(Args);
2167  else
2168    Opts.TokenCache = Opts.ImplicitPTHInclude;
2169  Opts.UsePredefines = !Args.hasArg(OPT_undef);
2170  Opts.DetailedRecord = Args.hasArg(OPT_detailed_preprocessing_record);
2171  Opts.DisablePCHValidation = Args.hasArg(OPT_fno_validate_pch);
2172
2173  Opts.DumpDeserializedPCHDecls = Args.hasArg(OPT_dump_deserialized_pch_decls);
2174  for (arg_iterator it = Args.filtered_begin(OPT_error_on_deserialized_pch_decl),
2175         ie = Args.filtered_end(); it != ie; ++it) {
2176    const Arg *A = *it;
2177    Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue(Args));
2178  }
2179
2180  if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
2181    StringRef Value(A->getValue(Args));
2182    size_t Comma = Value.find(',');
2183    unsigned Bytes = 0;
2184    unsigned EndOfLine = 0;
2185
2186    if (Comma == StringRef::npos ||
2187        Value.substr(0, Comma).getAsInteger(10, Bytes) ||
2188        Value.substr(Comma + 1).getAsInteger(10, EndOfLine))
2189      Diags.Report(diag::err_drv_preamble_format);
2190    else {
2191      Opts.PrecompiledPreambleBytes.first = Bytes;
2192      Opts.PrecompiledPreambleBytes.second = (EndOfLine != 0);
2193    }
2194  }
2195
2196  // Add macros from the command line.
2197  for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
2198         ie = Args.filtered_end(); it != ie; ++it) {
2199    if ((*it)->getOption().matches(OPT_D))
2200      Opts.addMacroDef((*it)->getValue(Args));
2201    else
2202      Opts.addMacroUndef((*it)->getValue(Args));
2203  }
2204
2205  Opts.MacroIncludes = Args.getAllArgValues(OPT_imacros);
2206
2207  // Add the ordered list of -includes.
2208  for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
2209                                             OPT_include_pth),
2210         ie = Args.filtered_end(); it != ie; ++it) {
2211    const Arg *A = *it;
2212    // PCH is handled specially, we need to extra the original include path.
2213    if (A->getOption().matches(OPT_include_pch)) {
2214      std::string OriginalFile =
2215        ASTReader::getOriginalSourceFile(A->getValue(Args), FileMgr, Diags);
2216      if (OriginalFile.empty())
2217        continue;
2218
2219      Opts.Includes.push_back(OriginalFile);
2220    } else
2221      Opts.Includes.push_back(A->getValue(Args));
2222  }
2223
2224  for (arg_iterator it = Args.filtered_begin(OPT_chain_include),
2225         ie = Args.filtered_end(); it != ie; ++it) {
2226    const Arg *A = *it;
2227    Opts.ChainedIncludes.push_back(A->getValue(Args));
2228  }
2229
2230  // Include 'altivec.h' if -faltivec option present
2231  if (Args.hasArg(OPT_faltivec))
2232    Opts.Includes.push_back("altivec.h");
2233
2234  for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
2235         ie = Args.filtered_end(); it != ie; ++it) {
2236    const Arg *A = *it;
2237    std::pair<StringRef,StringRef> Split =
2238      StringRef(A->getValue(Args)).split(';');
2239
2240    if (Split.second.empty()) {
2241      Diags.Report(diag::err_drv_invalid_remap_file) << A->getAsString(Args);
2242      continue;
2243    }
2244
2245    Opts.addRemappedFile(Split.first, Split.second);
2246  }
2247
2248  if (Arg *A = Args.getLastArg(OPT_fobjc_arc_cxxlib_EQ)) {
2249    StringRef Name = A->getValue(Args);
2250    unsigned Library = llvm::StringSwitch<unsigned>(Name)
2251      .Case("libc++", ARCXX_libcxx)
2252      .Case("libstdc++", ARCXX_libstdcxx)
2253      .Case("none", ARCXX_nolib)
2254      .Default(~0U);
2255    if (Library == ~0U)
2256      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
2257    else
2258      Opts.ObjCXXARCStandardLibrary = (ObjCXXARCStandardLibraryKind)Library;
2259  }
2260}
2261
2262static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
2263                                        ArgList &Args) {
2264  using namespace options;
2265  Opts.ShowCPP = !Args.hasArg(OPT_dM);
2266  Opts.ShowComments = Args.hasArg(OPT_C);
2267  Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
2268  Opts.ShowMacroComments = Args.hasArg(OPT_CC);
2269  Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
2270  Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
2271}
2272
2273static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
2274  using namespace options;
2275  Opts.ABI = Args.getLastArgValue(OPT_target_abi);
2276  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
2277  Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
2278  Opts.Features = Args.getAllArgValues(OPT_target_feature);
2279  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
2280  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
2281
2282  // Use the default target triple if unspecified.
2283  if (Opts.Triple.empty())
2284    Opts.Triple = llvm::sys::getDefaultTargetTriple();
2285}
2286
2287//
2288
2289bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
2290                                        const char *const *ArgBegin,
2291                                        const char *const *ArgEnd,
2292                                        DiagnosticsEngine &Diags) {
2293  bool Success = true;
2294
2295  // Parse the arguments.
2296  OwningPtr<OptTable> Opts(createDriverOptTable());
2297  unsigned MissingArgIndex, MissingArgCount;
2298  OwningPtr<InputArgList> Args(
2299    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
2300
2301  // Check for missing argument error.
2302  if (MissingArgCount) {
2303    Diags.Report(diag::err_drv_missing_argument)
2304      << Args->getArgString(MissingArgIndex) << MissingArgCount;
2305    Success = false;
2306  }
2307
2308  // Issue errors on unknown arguments.
2309  for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
2310         ie = Args->filtered_end(); it != ie; ++it) {
2311    Diags.Report(diag::err_drv_unknown_argument) << (*it)->getAsString(*Args);
2312    Success = false;
2313  }
2314
2315  // Issue errors on arguments that are not valid for CC1.
2316  for (ArgList::iterator I = Args->begin(), E = Args->end();
2317       I != E; ++I) {
2318    if (!(*I)->getOption().isCC1Option()) {
2319      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
2320      Success = false;
2321    }
2322  }
2323
2324  Success = ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags) && Success;
2325  Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
2326  ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
2327  Success = ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, &Diags)
2328            && Success;
2329  ParseFileSystemArgs(Res.getFileSystemOpts(), *Args);
2330  // FIXME: We shouldn't have to pass the DashX option around here
2331  InputKind DashX = ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
2332  Success = ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, DashX, Diags)
2333            && Success;
2334  ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
2335  if (DashX != IK_AST && DashX != IK_LLVM_IR) {
2336    ParseLangArgs(*Res.getLangOpts(), *Args, DashX, Diags);
2337    if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
2338      Res.getLangOpts()->ObjCExceptions = 1;
2339  }
2340  // FIXME: ParsePreprocessorArgs uses the FileManager to read the contents of
2341  // PCH file and find the original header name. Remove the need to do that in
2342  // ParsePreprocessorArgs and remove the FileManager
2343  // parameters from the function and the "FileManager.h" #include.
2344  FileManager FileMgr(Res.getFileSystemOpts());
2345  ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, FileMgr, Diags);
2346  ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
2347  ParseTargetArgs(Res.getTargetOpts(), *Args);
2348
2349  return Success;
2350}
2351
2352namespace {
2353
2354  class ModuleSignature {
2355    llvm::SmallVector<uint64_t, 16> Data;
2356    unsigned CurBit;
2357    uint64_t CurValue;
2358
2359  public:
2360    ModuleSignature() : CurBit(0), CurValue(0) { }
2361
2362    void add(uint64_t Value, unsigned Bits);
2363    void add(StringRef Value);
2364    void flush();
2365
2366    llvm::APInt getAsInteger() const;
2367  };
2368}
2369
2370void ModuleSignature::add(uint64_t Value, unsigned int NumBits) {
2371  CurValue |= Value << CurBit;
2372  if (CurBit + NumBits < 64) {
2373    CurBit += NumBits;
2374    return;
2375  }
2376
2377  // Add the current word.
2378  Data.push_back(CurValue);
2379
2380  if (CurBit)
2381    CurValue = Value >> (64-CurBit);
2382  else
2383    CurValue = 0;
2384  CurBit = (CurBit+NumBits) & 63;
2385}
2386
2387void ModuleSignature::flush() {
2388  if (CurBit == 0)
2389    return;
2390
2391  Data.push_back(CurValue);
2392  CurBit = 0;
2393  CurValue = 0;
2394}
2395
2396void ModuleSignature::add(StringRef Value) {
2397  for (StringRef::iterator I = Value.begin(), IEnd = Value.end(); I != IEnd;++I)
2398    add(*I, 8);
2399}
2400
2401llvm::APInt ModuleSignature::getAsInteger() const {
2402  return llvm::APInt(Data.size() * 64, Data);
2403}
2404
2405std::string CompilerInvocation::getModuleHash() const {
2406  ModuleSignature Signature;
2407
2408  // Start the signature with the compiler version.
2409  // FIXME: The full version string can be quite long.  Omit it from the
2410  // module hash for now to avoid failures where the path name becomes too
2411  // long.  An MD5 or similar checksum would work well here.
2412  // Signature.add(getClangFullRepositoryVersion());
2413
2414  // Extend the signature with the language options
2415#define LANGOPT(Name, Bits, Default, Description) \
2416  Signature.add(LangOpts->Name, Bits);
2417#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
2418  Signature.add(static_cast<unsigned>(LangOpts->get##Name()), Bits);
2419#define BENIGN_LANGOPT(Name, Bits, Default, Description)
2420#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
2421#include "clang/Basic/LangOptions.def"
2422
2423  // Extend the signature with the target triple
2424  llvm::Triple T(TargetOpts.Triple);
2425  Signature.add((unsigned)T.getArch(), 5);
2426  Signature.add((unsigned)T.getVendor(), 4);
2427  Signature.add((unsigned)T.getOS(), 5);
2428  Signature.add((unsigned)T.getEnvironment(), 4);
2429
2430  // Extend the signature with preprocessor options.
2431  Signature.add(getPreprocessorOpts().UsePredefines, 1);
2432  Signature.add(getPreprocessorOpts().DetailedRecord, 1);
2433
2434  // Hash the preprocessor defines.
2435  // FIXME: This is terrible. Use an MD5 sum of the preprocessor defines.
2436  std::vector<StringRef> MacroDefs;
2437  for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
2438            I = getPreprocessorOpts().Macros.begin(),
2439         IEnd = getPreprocessorOpts().Macros.end();
2440       I != IEnd; ++I) {
2441    if (!I->second)
2442      MacroDefs.push_back(I->first);
2443  }
2444  llvm::array_pod_sort(MacroDefs.begin(), MacroDefs.end());
2445
2446  unsigned PPHashResult = 0;
2447  for (unsigned I = 0, N = MacroDefs.size(); I != N; ++I)
2448    PPHashResult = llvm::HashString(MacroDefs[I], PPHashResult);
2449  Signature.add(PPHashResult, 32);
2450
2451  // We've generated the signature. Treat it as one large APInt that we'll
2452  // encode in base-36 and return.
2453  Signature.flush();
2454  return Signature.getAsInteger().toString(36, /*Signed=*/false);
2455}
2456