xref: /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp (revision e23003d1f1276f24dca2ec064f6cda0a64dec642) 
1 //===--- CompilerInvocation.cpp -------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "clang/Frontend/CompilerInvocation.h"
11 #include "clang/Basic/Diagnostic.h"
12 #include "clang/Basic/Version.h"
13 #include "clang/Driver/Arg.h"
14 #include "clang/Driver/ArgList.h"
15 #include "clang/Driver/CC1Options.h"
16 #include "clang/Driver/DriverDiagnostic.h"
17 #include "clang/Driver/OptTable.h"
18 #include "clang/Driver/Option.h"
19 #include "clang/Frontend/CompilerInvocation.h"
20 #include "clang/Frontend/LangStandard.h"
21 #include "clang/Frontend/PCHReader.h"
22 #include "llvm/ADT/OwningPtr.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/System/Host.h"
28 #include "llvm/System/Path.h"
29 using namespace clang;
30 
31 static const char *getAnalysisName(Analyses Kind) {
32   switch (Kind) {
33   default:
34     llvm_unreachable("Unknown analysis kind!");
35 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE)\
36   case NAME: return "-" CMDFLAG;
37 #include "clang/Frontend/Analyses.def"
38   }
39 }
40 
41 static const char *getAnalysisStoreName(AnalysisStores Kind) {
42   switch (Kind) {
43   default:
44     llvm_unreachable("Unknown analysis store!");
45 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
46   case NAME##Model: return CMDFLAG;
47 #include "clang/Frontend/Analyses.def"
48   }
49 }
50 
51 static const char *getAnalysisConstraintName(AnalysisConstraints Kind) {
52   switch (Kind) {
53   default:
54     llvm_unreachable("Unknown analysis constraints!");
55 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
56   case NAME##Model: return CMDFLAG;
57 #include "clang/Frontend/Analyses.def"
58   }
59 }
60 
61 static const char *getAnalysisDiagClientName(AnalysisDiagClients Kind) {
62   switch (Kind) {
63   default:
64     llvm_unreachable("Unknown analysis client!");
65 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREATE) \
66   case PD_##NAME: return CMDFLAG;
67 #include "clang/Frontend/Analyses.def"
68   }
69 }
70 
71 //===----------------------------------------------------------------------===//
72 // Serialization (to args)
73 //===----------------------------------------------------------------------===//
74 
75 static void AnalyzerOptsToArgs(const AnalyzerOptions &Opts,
76                                std::vector<std::string> &Res) {
77   for (unsigned i = 0, e = Opts.AnalysisList.size(); i != e; ++i)
78     Res.push_back(getAnalysisName(Opts.AnalysisList[i]));
79   if (Opts.AnalysisStoreOpt != BasicStoreModel) {
80     Res.push_back("-analyzer-store");
81     Res.push_back(getAnalysisStoreName(Opts.AnalysisStoreOpt));
82   }
83   if (Opts.AnalysisConstraintsOpt != RangeConstraintsModel) {
84     Res.push_back("-analyzer-constraints");
85     Res.push_back(getAnalysisConstraintName(Opts.AnalysisConstraintsOpt));
86   }
87   if (Opts.AnalysisDiagOpt != PD_HTML) {
88     Res.push_back("-analyzer-output");
89     Res.push_back(getAnalysisDiagClientName(Opts.AnalysisDiagOpt));
90   }
91   if (!Opts.AnalyzeSpecificFunction.empty()) {
92     Res.push_back("-analyze-function");
93     Res.push_back(Opts.AnalyzeSpecificFunction);
94   }
95   if (Opts.AnalyzeAll)
96     Res.push_back("-analyzer-opt-analyze-headers");
97   if (Opts.AnalyzerDisplayProgress)
98     Res.push_back("-analyzer-display-progress");
99   if (Opts.AnalyzeNestedBlocks)
100     Res.push_back("-analyzer-opt-analyze-nested-blocks");
101   if (Opts.EagerlyAssume)
102     Res.push_back("-analyzer-eagerly-assume");
103   if (!Opts.PurgeDead)
104     Res.push_back("-analyzer-no-purge-dead");
105   if (Opts.TrimGraph)
106     Res.push_back("-trim-egraph");
107   if (Opts.VisualizeEGDot)
108     Res.push_back("-analyzer-viz-egraph-graphviz");
109   if (Opts.VisualizeEGDot)
110     Res.push_back("-analyzer-viz-egraph-ubigraph");
111   if (Opts.EnableExperimentalChecks)
112     Res.push_back("-analyzer-experimental-checks");
113   if (Opts.EnableExperimentalInternalChecks)
114     Res.push_back("-analyzer-experimental-internal-checks");
115 }
116 
117 static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
118                               std::vector<std::string> &Res) {
119   if (Opts.DebugInfo)
120     Res.push_back("-g");
121   if (Opts.DisableLLVMOpts)
122     Res.push_back("-disable-llvm-optzns");
123   if (Opts.DisableRedZone)
124     Res.push_back("-disable-red-zone");
125   if (!Opts.DwarfDebugFlags.empty()) {
126     Res.push_back("-dwarf-debug-flags");
127     Res.push_back(Opts.DwarfDebugFlags);
128   }
129   if (!Opts.MergeAllConstants)
130     Res.push_back("-fno-merge-all-constants");
131   if (Opts.NoCommon)
132     Res.push_back("-fno-common");
133   if (Opts.NoImplicitFloat)
134     Res.push_back("-no-implicit-float");
135   if (Opts.OptimizeSize) {
136     assert(Opts.OptimizationLevel == 2 && "Invalid options!");
137     Res.push_back("-Os");
138   } else if (Opts.OptimizationLevel != 0)
139     Res.push_back("-O" + llvm::utostr(Opts.OptimizationLevel));
140   if (!Opts.MainFileName.empty()) {
141     Res.push_back("-main-file-name");
142     Res.push_back(Opts.MainFileName);
143   }
144   // SimplifyLibCalls is only derived.
145   // TimePasses is only derived.
146   // UnitAtATime is unused.
147   // UnrollLoops is only derived.
148   // VerifyModule is only derived.
149   // Inlining is only derived.
150 
151   if (Opts.AsmVerbose)
152     Res.push_back("-masm-verbose");
153   if (!Opts.CodeModel.empty()) {
154     Res.push_back("-mcode-model");
155     Res.push_back(Opts.CodeModel);
156   }
157   if (!Opts.DebugPass.empty()) {
158     Res.push_back("-mdebug-pass");
159     Res.push_back(Opts.DebugPass);
160   }
161   if (Opts.DisableFPElim)
162     Res.push_back("-mdisable-fp-elim");
163   if (!Opts.FloatABI.empty()) {
164     Res.push_back("-mfloat-abi");
165     Res.push_back(Opts.FloatABI);
166   }
167   if (!Opts.LimitFloatPrecision.empty()) {
168     Res.push_back("-mlimit-float-precision");
169     Res.push_back(Opts.LimitFloatPrecision);
170   }
171   if (Opts.NoZeroInitializedInBSS)
172     Res.push_back("-mno-zero-initialized-bss");
173   if (Opts.SoftFloat)
174     Res.push_back("-msoft-float");
175   if (Opts.UnwindTables)
176     Res.push_back("-munwind-tables");
177   if (Opts.RelocationModel != "pic") {
178     Res.push_back("-mrelocation-model");
179     Res.push_back(Opts.RelocationModel);
180   }
181 }
182 
183 static void DependencyOutputOptsToArgs(const DependencyOutputOptions &Opts,
184                                        std::vector<std::string> &Res) {
185   if (Opts.IncludeSystemHeaders)
186     Res.push_back("-sys-header-deps");
187   if (Opts.UsePhonyTargets)
188     Res.push_back("-MP");
189   if (!Opts.OutputFile.empty()) {
190     Res.push_back("-dependency-file");
191     Res.push_back(Opts.OutputFile);
192   }
193   for (unsigned i = 0, e = Opts.Targets.size(); i != e; ++i) {
194     Res.push_back("-MT");
195     Res.push_back(Opts.Targets[i]);
196   }
197 }
198 
199 static void DiagnosticOptsToArgs(const DiagnosticOptions &Opts,
200                                  std::vector<std::string> &Res) {
201   if (Opts.IgnoreWarnings)
202     Res.push_back("-w");
203   if (Opts.NoRewriteMacros)
204     Res.push_back("-Wno-rewrite-macros");
205   if (Opts.Pedantic)
206     Res.push_back("-pedantic");
207   if (Opts.PedanticErrors)
208     Res.push_back("-pedantic-errors");
209   if (!Opts.ShowColumn)
210     Res.push_back("-fno-show-column");
211   if (!Opts.ShowLocation)
212     Res.push_back("-fno-show-source-location");
213   if (!Opts.ShowCarets)
214     Res.push_back("-fno-caret-diagnostics");
215   if (!Opts.ShowFixits)
216     Res.push_back("-fno-diagnostics-fixit-info");
217   if (Opts.ShowSourceRanges)
218     Res.push_back("-fdiagnostics-print-source-range-info");
219   if (Opts.ShowColors)
220     Res.push_back("-fcolor-diagnostics");
221   if (Opts.VerifyDiagnostics)
222     Res.push_back("-verify");
223   if (Opts.ShowOptionNames)
224     Res.push_back("-fdiagnostics-show-option");
225   if (Opts.TabStop != 8) {
226     Res.push_back("-ftabstop");
227     Res.push_back(llvm::utostr(Opts.TabStop));
228   }
229   if (Opts.MessageLength) {
230     Res.push_back("-fmessage-length");
231     Res.push_back(llvm::utostr(Opts.MessageLength));
232   }
233   if (!Opts.DumpBuildInformation.empty()) {
234     Res.push_back("-dump-build-information");
235     Res.push_back(Opts.DumpBuildInformation);
236   }
237   for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i)
238     Res.push_back("-W" + Opts.Warnings[i]);
239 }
240 
241 static const char *getInputKindName(FrontendOptions::InputKind Kind) {
242   switch (Kind) {
243   case FrontendOptions::IK_None:              break;
244   case FrontendOptions::IK_AST:               return "ast";
245   case FrontendOptions::IK_Asm:               return "assembler-with-cpp";
246   case FrontendOptions::IK_C:                 return "c";
247   case FrontendOptions::IK_CXX:               return "c++";
248   case FrontendOptions::IK_ObjC:              return "objective-c";
249   case FrontendOptions::IK_ObjCXX:            return "objective-c++";
250   case FrontendOptions::IK_OpenCL:            return "cl";
251   case FrontendOptions::IK_PreprocessedC:     return "cpp-output";
252   case FrontendOptions::IK_PreprocessedCXX:   return "c++-cpp-output";
253   case FrontendOptions::IK_PreprocessedObjC:  return "objective-c-cpp-output";
254   case FrontendOptions::IK_PreprocessedObjCXX:return "objective-c++-cpp-output";
255   }
256 
257   llvm_unreachable("Unexpected language kind!");
258   return 0;
259 }
260 
261 static const char *getActionName(frontend::ActionKind Kind) {
262   switch (Kind) {
263   case frontend::PluginAction:
264   case frontend::InheritanceView:
265     llvm_unreachable("Invalid kind!");
266 
267   case frontend::ASTDump:                return "-ast-dump";
268   case frontend::ASTPrint:               return "-ast-print";
269   case frontend::ASTPrintXML:            return "-ast-print-xml";
270   case frontend::ASTView:                return "-ast-view";
271   case frontend::DumpRawTokens:          return "-dump-raw-tokens";
272   case frontend::DumpRecordLayouts:      return "-dump-record-layouts";
273   case frontend::DumpTokens:             return "-dump-tokens";
274   case frontend::EmitAssembly:           return "-S";
275   case frontend::EmitBC:                 return "-emit-llvm-bc";
276   case frontend::EmitHTML:               return "-emit-html";
277   case frontend::EmitLLVM:               return "-emit-llvm";
278   case frontend::EmitLLVMOnly:           return "-emit-llvm-only";
279   case frontend::FixIt:                  return "-fixit";
280   case frontend::GeneratePCH:            return "-emit-pch";
281   case frontend::GeneratePTH:            return "-emit-pth";
282   case frontend::ParseNoop:              return "-parse-noop";
283   case frontend::ParsePrintCallbacks:    return "-parse-print-callbacks";
284   case frontend::ParseSyntaxOnly:        return "-fsyntax-only";
285   case frontend::PrintDeclContext:       return "-print-decl-contexts";
286   case frontend::PrintPreprocessedInput: return "-E";
287   case frontend::RewriteMacros:          return "-rewrite-macros";
288   case frontend::RewriteObjC:            return "-rewrite-objc";
289   case frontend::RewriteTest:            return "-rewrite-test";
290   case frontend::RunAnalysis:            return "-analyze";
291   case frontend::RunPreprocessorOnly:    return "-Eonly";
292   }
293 
294   llvm_unreachable("Unexpected language kind!");
295   return 0;
296 }
297 
298 static void FrontendOptsToArgs(const FrontendOptions &Opts,
299                                std::vector<std::string> &Res) {
300   if (!Opts.DebugCodeCompletionPrinter)
301     Res.push_back("-no-code-completion-debug-printer");
302   if (Opts.DisableFree)
303     Res.push_back("-disable-free");
304   if (Opts.EmptyInputOnly)
305     Res.push_back("-empty-input-only");
306   if (Opts.RelocatablePCH)
307     Res.push_back("-relocatable-pch");
308   if (Opts.ShowHelp)
309     Res.push_back("-help");
310   if (Opts.ShowMacrosInCodeCompletion)
311     Res.push_back("-code-completion-macros");
312   if (Opts.ShowStats)
313     Res.push_back("-print-stats");
314   if (Opts.ShowTimers)
315     Res.push_back("-ftime-report");
316   if (Opts.ShowVersion)
317     Res.push_back("-version");
318 
319   bool NeedLang = false;
320   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i)
321     if (FrontendOptions::getInputKindForExtension(Opts.Inputs[i].second) !=
322         Opts.Inputs[i].first)
323       NeedLang = true;
324   if (NeedLang) {
325     Res.push_back("-x");
326     Res.push_back(getInputKindName(Opts.Inputs[0].first));
327   }
328   for (unsigned i = 0, e = Opts.Inputs.size(); i != e; ++i) {
329     assert((!NeedLang || Opts.Inputs[i].first == Opts.Inputs[0].first) &&
330            "Unable to represent this input vector!");
331     Res.push_back(Opts.Inputs[i].second);
332   }
333 
334   if (!Opts.OutputFile.empty()) {
335     Res.push_back("-o");
336     Res.push_back(Opts.OutputFile);
337   }
338   if (!Opts.ViewClassInheritance.empty()) {
339     Res.push_back("-cxx-inheritance-view");
340     Res.push_back(Opts.ViewClassInheritance);
341   }
342   for (unsigned i = 0, e = Opts.FixItLocations.size(); i != e; ++i) {
343     Res.push_back("-fixit-at");
344     Res.push_back(Opts.FixItLocations[i].FileName + ":" +
345                   llvm::utostr(Opts.FixItLocations[i].Line) + ":" +
346                   llvm::utostr(Opts.FixItLocations[i].Column));
347   }
348   if (!Opts.CodeCompletionAt.FileName.empty()) {
349     Res.push_back("-code-completion-at");
350     Res.push_back(Opts.CodeCompletionAt.FileName + ":" +
351                   llvm::utostr(Opts.CodeCompletionAt.Line) + ":" +
352                   llvm::utostr(Opts.CodeCompletionAt.Column));
353   }
354   if (Opts.ProgramAction != frontend::InheritanceView &&
355       Opts.ProgramAction != frontend::PluginAction)
356     Res.push_back(getActionName(Opts.ProgramAction));
357   if (!Opts.ActionName.empty()) {
358     Res.push_back("-plugin");
359     Res.push_back(Opts.ActionName);
360   }
361   for (unsigned i = 0, e = Opts.Plugins.size(); i != e; ++i) {
362     Res.push_back("-load");
363     Res.push_back(Opts.Plugins[i]);
364   }
365 }
366 
367 static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
368                                    std::vector<std::string> &Res) {
369   if (Opts.Sysroot != "/") {
370     Res.push_back("-isysroot");
371     Res.push_back(Opts.Sysroot);
372   }
373 
374   /// User specified include entries.
375   for (unsigned i = 0, e = Opts.UserEntries.size(); i != e; ++i) {
376     const HeaderSearchOptions::Entry &E = Opts.UserEntries[i];
377     if (E.IsFramework && (E.Group != frontend::Angled || !E.IsUserSupplied))
378       llvm::llvm_report_error("Invalid option set!");
379     if (E.IsUserSupplied) {
380       if (E.Group == frontend::After) {
381         Res.push_back("-idirafter");
382       } else if (E.Group == frontend::Quoted) {
383         Res.push_back("-iquote");
384       } else if (E.Group == frontend::System) {
385         Res.push_back("-isystem");
386       } else {
387         assert(E.Group == frontend::Angled && "Invalid group!");
388         Res.push_back(E.IsFramework ? "-F" : "-I");
389       }
390     } else {
391       if (E.Group != frontend::Angled && E.Group != frontend::System)
392         llvm::llvm_report_error("Invalid option set!");
393       Res.push_back(E.Group == frontend::Angled ? "-iwithprefixbefore" :
394                     "-iwithprefix");
395     }
396     Res.push_back(E.Path);
397   }
398 
399   if (!Opts.EnvIncPath.empty()) {
400     // FIXME: Provide an option for this, and move env detection to driver.
401     llvm::llvm_report_error("Not yet implemented!");
402   }
403   if (!Opts.CEnvIncPath.empty()) {
404     // FIXME: Provide an option for this, and move env detection to driver.
405     llvm::llvm_report_error("Not yet implemented!");
406   }
407   if (!Opts.ObjCEnvIncPath.empty()) {
408     // FIXME: Provide an option for this, and move env detection to driver.
409     llvm::llvm_report_error("Not yet implemented!");
410   }
411   if (!Opts.CXXEnvIncPath.empty()) {
412     // FIXME: Provide an option for this, and move env detection to driver.
413     llvm::llvm_report_error("Not yet implemented!");
414   }
415   if (!Opts.ObjCXXEnvIncPath.empty()) {
416     // FIXME: Provide an option for this, and move env detection to driver.
417     llvm::llvm_report_error("Not yet implemented!");
418   }
419   if (!Opts.ResourceDir.empty()) {
420     Res.push_back("-resource-dir");
421     Res.push_back(Opts.ResourceDir);
422   }
423   if (!Opts.UseStandardIncludes)
424     Res.push_back("-nostdinc");
425   if (Opts.Verbose)
426     Res.push_back("-v");
427 }
428 
429 static void LangOptsToArgs(const LangOptions &Opts,
430                            std::vector<std::string> &Res) {
431   LangOptions DefaultLangOpts;
432 
433   // FIXME: Need to set -std to get all the implicit options.
434 
435   // FIXME: We want to only pass options relative to the defaults, which
436   // requires constructing a target. :(
437   //
438   // It would be better to push the all target specific choices into the driver,
439   // so that everything below that was more uniform.
440 
441   if (Opts.Trigraphs)
442     Res.push_back("-trigraphs");
443   // Implicit based on the input kind:
444   //   AsmPreprocessor, CPlusPlus, ObjC1, ObjC2, OpenCL
445   // Implicit based on the input language standard:
446   //   BCPLComment, C99, CPlusPlus0x, Digraphs, GNUInline, ImplicitInt, GNUMode
447   if (Opts.DollarIdents)
448     Res.push_back("-fdollars-in-identifiers");
449   if (Opts.Microsoft)
450     Res.push_back("-fms-extensions");
451   if (Opts.ObjCNonFragileABI)
452     Res.push_back("-fobjc-nonfragile-abi");
453   // NoInline is implicit.
454   if (!Opts.CXXOperatorNames)
455     Res.push_back("-fno-operator-names");
456   if (Opts.PascalStrings)
457     Res.push_back("-fpascal-strings");
458   if (Opts.CatchUndefined)
459     Res.push_back("-fcatch-undefined-behavior");
460   if (Opts.WritableStrings)
461     Res.push_back("-fwritable-strings");
462   if (!Opts.LaxVectorConversions)
463     Res.push_back("-fno-lax-vector-conversions");
464   if (Opts.AltiVec)
465     Res.push_back("-faltivec");
466   if (Opts.Exceptions)
467     Res.push_back("-fexceptions");
468   if (!Opts.RTTI)
469     Res.push_back("-fno-rtti");
470   if (!Opts.NeXTRuntime)
471     Res.push_back("-fgnu-runtime");
472   if (Opts.Freestanding)
473     Res.push_back("-ffreestanding");
474   if (Opts.NoBuiltin)
475     Res.push_back("-fno-builtin");
476   if (!Opts.AssumeSaneOperatorNew)
477     Res.push_back("-fno-assume-sane-operator-new");
478   if (Opts.ThreadsafeStatics)
479     llvm::llvm_report_error("FIXME: Not yet implemented!");
480   if (Opts.POSIXThreads)
481     Res.push_back("-pthread");
482   if (Opts.Blocks)
483     Res.push_back("-fblocks");
484   if (Opts.EmitAllDecls)
485     Res.push_back("-femit-all-decls");
486   if (Opts.MathErrno)
487     Res.push_back("-fmath-errno");
488   if (Opts.OverflowChecking)
489     Res.push_back("-ftrapv");
490   if (Opts.HeinousExtensions)
491     Res.push_back("-fheinous-gnu-extensions");
492   // Optimize is implicit.
493   // OptimizeSize is implicit.
494   if (Opts.Static)
495     Res.push_back("-static-define");
496   if (Opts.PICLevel) {
497     Res.push_back("-pic-level");
498     Res.push_back(llvm::utostr(Opts.PICLevel));
499   }
500   if (Opts.ObjCGCBitmapPrint)
501     Res.push_back("-print-ivar-layout");
502   // FIXME: Don't forget to update when the default changes!
503   if (Opts.AccessControl)
504     Res.push_back("-faccess-control");
505   if (!Opts.CharIsSigned)
506     Res.push_back("-fno-signed-char");
507   if (Opts.ShortWChar)
508     Res.push_back("-fshort-wchar");
509   if (!Opts.ElideConstructors)
510     Res.push_back("-fno-elide-constructors");
511   if (Opts.getGCMode() != LangOptions::NonGC) {
512     if (Opts.getGCMode() == LangOptions::HybridGC) {
513       Res.push_back("-fobjc-gc");
514     } else {
515       assert(Opts.getGCMode() == LangOptions::GCOnly && "Invalid GC mode!");
516       Res.push_back("-fobjc-gc-only");
517     }
518   }
519   if (Opts.getVisibilityMode() != LangOptions::Default) {
520     Res.push_back("-fvisibility");
521     if (Opts.getVisibilityMode() == LangOptions::Hidden) {
522       Res.push_back("hidden");
523     } else {
524       assert(Opts.getVisibilityMode() == LangOptions::Protected &&
525              "Invalid visibility!");
526       Res.push_back("protected");
527     }
528   }
529   if (Opts.getStackProtectorMode() != 0) {
530     Res.push_back("-stack-protector");
531     Res.push_back(llvm::utostr(Opts.getStackProtectorMode()));
532   }
533   if (Opts.InstantiationDepth != DefaultLangOpts.InstantiationDepth) {
534     Res.push_back("-ftemplate-depth");
535     Res.push_back(llvm::utostr(Opts.InstantiationDepth));
536   }
537   if (!Opts.ObjCConstantStringClass.empty()) {
538     Res.push_back("-fconstant-string-class");
539     Res.push_back(Opts.ObjCConstantStringClass);
540   }
541 }
542 
543 static void PreprocessorOptsToArgs(const PreprocessorOptions &Opts,
544                                    std::vector<std::string> &Res) {
545   for (unsigned i = 0, e = Opts.Macros.size(); i != e; ++i)
546     Res.push_back(std::string(Opts.Macros[i].second ? "-U" : "-D") +
547                   Opts.Macros[i].first);
548   for (unsigned i = 0, e = Opts.Includes.size(); i != e; ++i) {
549     // FIXME: We need to avoid reincluding the implicit PCH and PTH includes.
550     Res.push_back("-include");
551     Res.push_back(Opts.Includes[i]);
552   }
553   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
554     Res.push_back("-imacros");
555     Res.push_back(Opts.MacroIncludes[i]);
556   }
557   if (!Opts.UsePredefines)
558     Res.push_back("-undef");
559   if (!Opts.ImplicitPCHInclude.empty()) {
560     Res.push_back("-include-pch");
561     Res.push_back(Opts.ImplicitPCHInclude);
562   }
563   if (!Opts.ImplicitPTHInclude.empty()) {
564     Res.push_back("-include-pth");
565     Res.push_back(Opts.ImplicitPTHInclude);
566   }
567   if (!Opts.TokenCache.empty()) {
568     if (Opts.ImplicitPTHInclude.empty()) {
569       Res.push_back("-token-cache");
570       Res.push_back(Opts.TokenCache);
571     } else
572       assert(Opts.ImplicitPTHInclude == Opts.TokenCache &&
573              "Unsupported option combination!");
574   }
575   for (unsigned i = 0, e = Opts.RemappedFiles.size(); i != e; ++i) {
576     Res.push_back("-remap-file");
577     Res.push_back(Opts.RemappedFiles[i].first + ";" +
578                   Opts.RemappedFiles[i].second);
579   }
580 }
581 
582 static void PreprocessorOutputOptsToArgs(const PreprocessorOutputOptions &Opts,
583                                          std::vector<std::string> &Res) {
584   if (!Opts.ShowCPP && !Opts.ShowMacros)
585     llvm::llvm_report_error("Invalid option combination!");
586 
587   if (Opts.ShowCPP && Opts.ShowMacros)
588     Res.push_back("-dD");
589   else if (!Opts.ShowCPP && Opts.ShowMacros)
590     Res.push_back("-dM");
591 
592   if (!Opts.ShowLineMarkers)
593     Res.push_back("-P");
594   if (Opts.ShowComments)
595     Res.push_back("-C");
596   if (Opts.ShowMacroComments)
597     Res.push_back("-CC");
598 }
599 
600 static void TargetOptsToArgs(const TargetOptions &Opts,
601                              std::vector<std::string> &Res) {
602   Res.push_back("-triple");
603   Res.push_back(Opts.Triple);
604   if (!Opts.CPU.empty()) {
605     Res.push_back("-target-cpu");
606     Res.push_back(Opts.CPU);
607   }
608   if (!Opts.ABI.empty()) {
609     Res.push_back("-target-abi");
610     Res.push_back(Opts.ABI);
611   }
612   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
613     Res.push_back("-target-feature");
614     Res.push_back(Opts.Features[i]);
615   }
616 }
617 
618 void CompilerInvocation::toArgs(std::vector<std::string> &Res) {
619   AnalyzerOptsToArgs(getAnalyzerOpts(), Res);
620   CodeGenOptsToArgs(getCodeGenOpts(), Res);
621   DependencyOutputOptsToArgs(getDependencyOutputOpts(), Res);
622   DiagnosticOptsToArgs(getDiagnosticOpts(), Res);
623   FrontendOptsToArgs(getFrontendOpts(), Res);
624   HeaderSearchOptsToArgs(getHeaderSearchOpts(), Res);
625   LangOptsToArgs(getLangOpts(), Res);
626   PreprocessorOptsToArgs(getPreprocessorOpts(), Res);
627   PreprocessorOutputOptsToArgs(getPreprocessorOutputOpts(), Res);
628   TargetOptsToArgs(getTargetOpts(), Res);
629 }
630 
631 //===----------------------------------------------------------------------===//
632 // Deserialization (to args)
633 //===----------------------------------------------------------------------===//
634 
635 using namespace clang::driver;
636 using namespace clang::driver::cc1options;
637 
638 static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
639                                        llvm::StringRef Default = "") {
640   if (Arg *A = Args.getLastArg(ID))
641     return A->getValue(Args);
642   return Default;
643 }
644 
645 static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
646                               int Default, Diagnostic &Diags) {
647   Arg *A = Args.getLastArg(ID);
648   if (!A)
649     return Default;
650 
651   int Res = Default;
652   if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
653     Diags.Report(diag::err_drv_invalid_int_value)
654         << A->getAsString(Args) << A->getValue(Args);
655 
656   return Res;
657 }
658 
659 static std::vector<std::string>
660 getAllArgValues(ArgList &Args, cc1options::ID ID) {
661   llvm::SmallVector<const char *, 16> Values;
662   Args.AddAllArgValues(Values, ID);
663   return std::vector<std::string>(Values.begin(), Values.end());
664 }
665 
666 //
667 
668 static void ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
669                               Diagnostic &Diags) {
670   using namespace cc1options;
671 
672   Opts.AnalysisList.clear();
673 #define ANALYSIS(NAME, CMDFLAG, DESC, SCOPE) \
674   if (Args.hasArg(OPT_analysis_##NAME)) Opts.AnalysisList.push_back(NAME);
675 #include "clang/Frontend/Analyses.def"
676 
677   if (Arg *A = Args.getLastArg(OPT_analyzer_store)) {
678     llvm::StringRef Name = A->getValue(Args);
679     AnalysisStores Value = llvm::StringSwitch<AnalysisStores>(Name)
680 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATFN) \
681       .Case(CMDFLAG, NAME##Model)
682 #include "clang/Frontend/Analyses.def"
683       .Default(NumStores);
684     // FIXME: Error handling.
685     if (Value == NumStores)
686       Diags.Report(diag::err_drv_invalid_value)
687         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
688     else
689       Opts.AnalysisStoreOpt = Value;
690   }
691 
692   if (Arg *A = Args.getLastArg(OPT_analyzer_constraints)) {
693     llvm::StringRef Name = A->getValue(Args);
694     AnalysisConstraints Value = llvm::StringSwitch<AnalysisConstraints>(Name)
695 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATFN) \
696       .Case(CMDFLAG, NAME##Model)
697 #include "clang/Frontend/Analyses.def"
698       .Default(NumConstraints);
699     // FIXME: Error handling.
700     if (Value == NumConstraints)
701       Diags.Report(diag::err_drv_invalid_value)
702         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
703     else
704       Opts.AnalysisConstraintsOpt = Value;
705   }
706 
707   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
708     llvm::StringRef Name = A->getValue(Args);
709     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
710 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
711       .Case(CMDFLAG, PD_##NAME)
712 #include "clang/Frontend/Analyses.def"
713       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
714     // FIXME: Error handling.
715     if (Value == NUM_ANALYSIS_DIAG_CLIENTS)
716       Diags.Report(diag::err_drv_invalid_value)
717         << Args.getLastArg(OPT_O)->getAsString(Args) << Name;
718     else
719       Opts.AnalysisDiagOpt = Value;
720   }
721 
722   Opts.VisualizeEGDot = Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
723   Opts.VisualizeEGUbi = Args.hasArg(OPT_analyzer_viz_egraph_ubigraph);
724   Opts.AnalyzeAll = Args.hasArg(OPT_analyzer_opt_analyze_headers);
725   Opts.AnalyzerDisplayProgress = Args.hasArg(OPT_analyzer_display_progress);
726   Opts.AnalyzeNestedBlocks =
727     Args.hasArg(OPT_analyzer_opt_analyze_nested_blocks);
728   Opts.PurgeDead = !Args.hasArg(OPT_analyzer_no_purge_dead);
729   Opts.EagerlyAssume = Args.hasArg(OPT_analyzer_eagerly_assume);
730   Opts.AnalyzeSpecificFunction = getLastArgValue(Args, OPT_analyze_function);
731   Opts.EnableExperimentalChecks = Args.hasArg(OPT_analyzer_experimental_checks);
732   Opts.EnableExperimentalInternalChecks =
733     Args.hasArg(OPT_analyzer_experimental_internal_checks);
734   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
735 }
736 
737 static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
738                              Diagnostic &Diags) {
739   using namespace cc1options;
740   // -Os implies -O2
741   if (Args.hasArg(OPT_Os))
742     Opts.OptimizationLevel = 2;
743   else {
744     Opts.OptimizationLevel = getLastArgIntValue(Args, OPT_O, 0, Diags);
745     if (Opts.OptimizationLevel > 3) {
746       Diags.Report(diag::err_drv_invalid_value)
747         << Args.getLastArg(OPT_O)->getAsString(Args) << Opts.OptimizationLevel;
748       Opts.OptimizationLevel = 3;
749     }
750   }
751 
752   // We must always run at least the always inlining pass.
753   Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
754     : CodeGenOptions::OnlyAlwaysInlining;
755 
756   Opts.DebugInfo = Args.hasArg(OPT_g);
757   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
758   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
759   Opts.DwarfDebugFlags = getLastArgValue(Args, OPT_dwarf_debug_flags);
760   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
761   Opts.NoCommon = Args.hasArg(OPT_fno_common);
762   Opts.NoImplicitFloat = Args.hasArg(OPT_no_implicit_float);
763   Opts.OptimizeSize = Args.hasArg(OPT_Os);
764   Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
765 
766   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
767   Opts.CodeModel = getLastArgValue(Args, OPT_mcode_model);
768   Opts.DebugPass = getLastArgValue(Args, OPT_mdebug_pass);
769   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
770   Opts.FloatABI = getLastArgValue(Args, OPT_mfloat_abi);
771   Opts.LimitFloatPrecision = getLastArgValue(Args, OPT_mlimit_float_precision);
772   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
773   Opts.SoftFloat = Args.hasArg(OPT_msoft_float);
774   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
775   Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
776 
777   Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
778 
779   // FIXME: Put elsewhere?
780 #ifdef NDEBUG
781   Opts.VerifyModule = 0;
782 #else
783   Opts.VerifyModule = 1;
784 #endif
785 }
786 
787 static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
788                                       ArgList &Args) {
789   using namespace cc1options;
790   Opts.OutputFile = getLastArgValue(Args, OPT_dependency_file);
791   Opts.Targets = getAllArgValues(Args, OPT_MT);
792   Opts.IncludeSystemHeaders = Args.hasArg(OPT_sys_header_deps);
793   Opts.UsePhonyTargets = Args.hasArg(OPT_MP);
794 }
795 
796 static void ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
797                                 Diagnostic &Diags) {
798   using namespace cc1options;
799   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
800   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
801   Opts.Pedantic = Args.hasArg(OPT_pedantic);
802   Opts.PedanticErrors = Args.hasArg(OPT_pedantic_errors);
803   Opts.ShowCarets = !Args.hasArg(OPT_fno_caret_diagnostics);
804   Opts.ShowColors = Args.hasArg(OPT_fcolor_diagnostics);
805   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
806   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
807   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
808   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
809   Opts.ShowSourceRanges = Args.hasArg(OPT_fdiagnostics_print_source_range_info);
810   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
811   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop, 8, Diags);
812   Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
813   Opts.DumpBuildInformation = getLastArgValue(Args, OPT_dump_build_information);
814   Opts.Warnings = getAllArgValues(Args, OPT_W);
815 }
816 
817 static FrontendOptions::InputKind
818 ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
819   using namespace cc1options;
820   Opts.ProgramAction = frontend::ParseSyntaxOnly;
821   if (const Arg *A = Args.getLastArg(OPT_Action_Group)) {
822     switch (A->getOption().getID()) {
823     default:
824       assert(0 && "Invalid option in group!");
825     case OPT_ast_dump:
826       Opts.ProgramAction = frontend::ASTDump; break;
827     case OPT_ast_print:
828       Opts.ProgramAction = frontend::ASTPrint; break;
829     case OPT_ast_print_xml:
830       Opts.ProgramAction = frontend::ASTPrintXML; break;
831     case OPT_ast_view:
832       Opts.ProgramAction = frontend::ASTView; break;
833     case OPT_dump_raw_tokens:
834       Opts.ProgramAction = frontend::DumpRawTokens; break;
835     case OPT_dump_record_layouts:
836       Opts.ProgramAction = frontend::DumpRecordLayouts; break;
837     case OPT_dump_tokens:
838       Opts.ProgramAction = frontend::DumpTokens; break;
839     case OPT_S:
840       Opts.ProgramAction = frontend::EmitAssembly; break;
841     case OPT_emit_llvm_bc:
842       Opts.ProgramAction = frontend::EmitBC; break;
843     case OPT_emit_html:
844       Opts.ProgramAction = frontend::EmitHTML; break;
845     case OPT_emit_llvm:
846       Opts.ProgramAction = frontend::EmitLLVM; break;
847     case OPT_emit_llvm_only:
848       Opts.ProgramAction = frontend::EmitLLVMOnly; break;
849     case OPT_fixit:
850       Opts.ProgramAction = frontend::FixIt; break;
851     case OPT_emit_pch:
852       Opts.ProgramAction = frontend::GeneratePCH; break;
853     case OPT_emit_pth:
854       Opts.ProgramAction = frontend::GeneratePTH; break;
855     case OPT_parse_noop:
856       Opts.ProgramAction = frontend::ParseNoop; break;
857     case OPT_parse_print_callbacks:
858       Opts.ProgramAction = frontend::ParsePrintCallbacks; break;
859     case OPT_fsyntax_only:
860       Opts.ProgramAction = frontend::ParseSyntaxOnly; break;
861     case OPT_print_decl_contexts:
862       Opts.ProgramAction = frontend::PrintDeclContext; break;
863     case OPT_E:
864       Opts.ProgramAction = frontend::PrintPreprocessedInput; break;
865     case OPT_rewrite_macros:
866       Opts.ProgramAction = frontend::RewriteMacros; break;
867     case OPT_rewrite_objc:
868       Opts.ProgramAction = frontend::RewriteObjC; break;
869     case OPT_rewrite_test:
870       Opts.ProgramAction = frontend::RewriteTest; break;
871     case OPT_analyze:
872       Opts.ProgramAction = frontend::RunAnalysis; break;
873     case OPT_Eonly:
874       Opts.ProgramAction = frontend::RunPreprocessorOnly; break;
875     }
876   }
877   if (const Arg *A = Args.getLastArg(OPT_plugin)) {
878     Opts.ProgramAction = frontend::PluginAction;
879     Opts.ActionName = A->getValue(Args);
880   }
881 
882   if (const Arg *A = Args.getLastArg(OPT_code_completion_at)) {
883     Opts.CodeCompletionAt =
884       ParsedSourceLocation::FromString(A->getValue(Args));
885     if (Opts.CodeCompletionAt.FileName.empty())
886       Diags.Report(diag::err_drv_invalid_value)
887         << A->getAsString(Args) << A->getValue(Args);
888   }
889   Opts.DebugCodeCompletionPrinter =
890     !Args.hasArg(OPT_no_code_completion_debug_printer);
891   Opts.DisableFree = Args.hasArg(OPT_disable_free);
892   Opts.EmptyInputOnly = Args.hasArg(OPT_empty_input_only);
893 
894   Opts.FixItLocations.clear();
895   for (arg_iterator it = Args.filtered_begin(OPT_fixit_at),
896          ie = Args.filtered_end(); it != ie; ++it) {
897     const char *Loc = it->getValue(Args);
898     ParsedSourceLocation PSL = ParsedSourceLocation::FromString(Loc);
899 
900     if (PSL.FileName.empty()) {
901       Diags.Report(diag::err_drv_invalid_value) << it->getAsString(Args) << Loc;
902       continue;
903     }
904 
905     Opts.FixItLocations.push_back(PSL);
906   }
907 
908   Opts.OutputFile = getLastArgValue(Args, OPT_o);
909   Opts.Plugins = getAllArgValues(Args, OPT_load);
910   Opts.RelocatablePCH = Args.hasArg(OPT_relocatable_pch);
911   Opts.ShowHelp = Args.hasArg(OPT_help);
912   Opts.ShowMacrosInCodeCompletion = Args.hasArg(OPT_code_completion_macros);
913   Opts.ShowStats = Args.hasArg(OPT_print_stats);
914   Opts.ShowTimers = Args.hasArg(OPT_ftime_report);
915   Opts.ShowVersion = Args.hasArg(OPT_version);
916   Opts.ViewClassInheritance = getLastArgValue(Args, OPT_cxx_inheritance_view);
917 
918   FrontendOptions::InputKind DashX = FrontendOptions::IK_None;
919   if (const Arg *A = Args.getLastArg(OPT_x)) {
920     DashX = llvm::StringSwitch<FrontendOptions::InputKind>(A->getValue(Args))
921       .Case("c", FrontendOptions::IK_C)
922       .Case("cl", FrontendOptions::IK_OpenCL)
923       .Case("c", FrontendOptions::IK_C)
924       .Case("cl", FrontendOptions::IK_OpenCL)
925       .Case("c++", FrontendOptions::IK_CXX)
926       .Case("objective-c", FrontendOptions::IK_ObjC)
927       .Case("objective-c++", FrontendOptions::IK_ObjCXX)
928       .Case("cpp-output", FrontendOptions::IK_PreprocessedC)
929       .Case("assembler-with-cpp", FrontendOptions::IK_Asm)
930       .Case("c++-cpp-output", FrontendOptions::IK_PreprocessedCXX)
931       .Case("objective-c-cpp-output", FrontendOptions::IK_PreprocessedObjC)
932       .Case("objective-c++-cpp-output", FrontendOptions::IK_PreprocessedObjCXX)
933       .Case("c-header", FrontendOptions::IK_C)
934       .Case("objective-c-header", FrontendOptions::IK_ObjC)
935       .Case("c++-header", FrontendOptions::IK_CXX)
936       .Case("objective-c++-header", FrontendOptions::IK_ObjCXX)
937       .Case("ast", FrontendOptions::IK_AST)
938       .Default(FrontendOptions::IK_None);
939     if (DashX == FrontendOptions::IK_None)
940       Diags.Report(diag::err_drv_invalid_value)
941         << A->getAsString(Args) << A->getValue(Args);
942   }
943 
944   // '-' is the default input if none is given.
945   std::vector<std::string> Inputs = getAllArgValues(Args, OPT_INPUT);
946   Opts.Inputs.clear();
947   if (Inputs.empty())
948     Inputs.push_back("-");
949   for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
950     FrontendOptions::InputKind IK = DashX;
951     if (IK == FrontendOptions::IK_None) {
952       IK = FrontendOptions::getInputKindForExtension(
953         llvm::StringRef(Inputs[i]).rsplit('.').second);
954       // FIXME: Remove this hack.
955       if (i == 0)
956         DashX = IK;
957     }
958     Opts.Inputs.push_back(std::make_pair(IK, Inputs[i]));
959   }
960 
961   return DashX;
962 }
963 
964 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
965                                                  void *MainAddr) {
966   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
967 
968   if (!P.isEmpty()) {
969     P.eraseComponent();  // Remove /clang from foo/bin/clang
970     P.eraseComponent();  // Remove /bin   from foo/bin
971 
972     // Get foo/lib/clang/<version>/include
973     P.appendComponent("lib");
974     P.appendComponent("clang");
975     P.appendComponent(CLANG_VERSION_STRING);
976   }
977 
978   return P.str();
979 }
980 
981 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
982   using namespace cc1options;
983   Opts.Sysroot = getLastArgValue(Args, OPT_isysroot, "/");
984   Opts.Verbose = Args.hasArg(OPT_v);
985   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
986   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
987   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
988 
989   // Add -I... and -F... options in order.
990   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),
991          ie = Args.filtered_end(); it != ie; ++it)
992     Opts.AddPath(it->getValue(Args), frontend::Angled, true,
993                  /*IsFramework=*/ it->getOption().matches(OPT_F));
994 
995   // Add -iprefix/-iwith-prefix/-iwithprefixbefore options.
996   llvm::StringRef Prefix = ""; // FIXME: This isn't the correct default prefix.
997   for (arg_iterator it = Args.filtered_begin(OPT_iprefix, OPT_iwithprefix,
998                                              OPT_iwithprefixbefore),
999          ie = Args.filtered_end(); it != ie; ++it) {
1000     if (it->getOption().matches(OPT_iprefix))
1001       Prefix = it->getValue(Args);
1002     else if (it->getOption().matches(OPT_iwithprefix))
1003       Opts.AddPath(Prefix.str() + it->getValue(Args),
1004                    frontend::System, false, false);
1005     else
1006       Opts.AddPath(Prefix.str() + it->getValue(Args),
1007                    frontend::Angled, false, false);
1008   }
1009 
1010   for (arg_iterator it = Args.filtered_begin(OPT_idirafter),
1011          ie = Args.filtered_end(); it != ie; ++it)
1012     Opts.AddPath(it->getValue(Args), frontend::After, true, false);
1013   for (arg_iterator it = Args.filtered_begin(OPT_iquote),
1014          ie = Args.filtered_end(); it != ie; ++it)
1015     Opts.AddPath(it->getValue(Args), frontend::Quoted, true, false);
1016   for (arg_iterator it = Args.filtered_begin(OPT_isystem),
1017          ie = Args.filtered_end(); it != ie; ++it)
1018     Opts.AddPath(it->getValue(Args), frontend::System, true, false);
1019 
1020   // FIXME: Need options for the various environment variables!
1021 }
1022 
1023 static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
1024                           FrontendOptions::InputKind IK,
1025                           Diagnostic &Diags) {
1026   // FIXME: Cleanup per-file based stuff.
1027 
1028   // Set some properties which depend soley on the input kind; it would be nice
1029   // to move these to the language standard, and have the driver resolve the
1030   // input kind + language standard.
1031   if (IK == FrontendOptions::IK_Asm) {
1032     Opts.AsmPreprocessor = 1;
1033   } else if (IK == FrontendOptions::IK_ObjC ||
1034              IK == FrontendOptions::IK_ObjCXX ||
1035              IK == FrontendOptions::IK_PreprocessedObjC ||
1036              IK == FrontendOptions::IK_PreprocessedObjCXX) {
1037     Opts.ObjC1 = Opts.ObjC2 = 1;
1038   }
1039 
1040   LangStandard::Kind LangStd = LangStandard::lang_unspecified;
1041   if (const Arg *A = Args.getLastArg(OPT_std_EQ)) {
1042     LangStd = llvm::StringSwitch<LangStandard::Kind>(A->getValue(Args))
1043 #define LANGSTANDARD(id, name, desc, features) \
1044       .Case(name, LangStandard::lang_##id)
1045 #include "clang/Frontend/LangStandards.def"
1046       .Default(LangStandard::lang_unspecified);
1047     if (LangStd == LangStandard::lang_unspecified)
1048       Diags.Report(diag::err_drv_invalid_value)
1049         << A->getAsString(Args) << A->getValue(Args);
1050   }
1051 
1052   if (LangStd == LangStandard::lang_unspecified) {
1053     // Based on the base language, pick one.
1054     switch (IK) {
1055     case FrontendOptions::IK_None:
1056     case FrontendOptions::IK_AST:
1057       assert(0 && "Invalid input kind!");
1058     case FrontendOptions::IK_OpenCL:
1059       LangStd = LangStandard::lang_opencl;
1060       break;
1061     case FrontendOptions::IK_Asm:
1062     case FrontendOptions::IK_C:
1063     case FrontendOptions::IK_PreprocessedC:
1064     case FrontendOptions::IK_ObjC:
1065     case FrontendOptions::IK_PreprocessedObjC:
1066       LangStd = LangStandard::lang_gnu99;
1067       break;
1068     case FrontendOptions::IK_CXX:
1069     case FrontendOptions::IK_PreprocessedCXX:
1070     case FrontendOptions::IK_ObjCXX:
1071     case FrontendOptions::IK_PreprocessedObjCXX:
1072       LangStd = LangStandard::lang_gnucxx98;
1073       break;
1074     }
1075   }
1076 
1077   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
1078   Opts.BCPLComment = Std.hasBCPLComments();
1079   Opts.C99 = Std.isC99();
1080   Opts.CPlusPlus = Std.isCPlusPlus();
1081   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
1082   Opts.Digraphs = Std.hasDigraphs();
1083   Opts.GNUMode = Std.isGNUMode();
1084   Opts.GNUInline = !Std.isC99();
1085   Opts.HexFloats = Std.hasHexFloats();
1086   Opts.ImplicitInt = Std.hasImplicitInt();
1087 
1088   // OpenCL has some additional defaults.
1089   if (LangStd == LangStandard::lang_opencl) {
1090     Opts.OpenCL = 1;
1091     Opts.AltiVec = 1;
1092     Opts.CXXOperatorNames = 1;
1093     Opts.LaxVectorConversions = 1;
1094   }
1095 
1096   // OpenCL and C++ both have bool, true, false keywords.
1097   Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;
1098 
1099   if (Opts.CPlusPlus)
1100     Opts.CXXOperatorNames = !Args.hasArg(OPT_fno_operator_names);
1101 
1102   if (Args.hasArg(OPT_fobjc_gc_only))
1103     Opts.setGCMode(LangOptions::GCOnly);
1104   else if (Args.hasArg(OPT_fobjc_gc))
1105     Opts.setGCMode(LangOptions::HybridGC);
1106 
1107   if (Args.hasArg(OPT_print_ivar_layout))
1108     Opts.ObjCGCBitmapPrint = 1;
1109 
1110   if (Args.hasArg(OPT_faltivec))
1111     Opts.AltiVec = 1;
1112 
1113   if (Args.hasArg(OPT_pthread))
1114     Opts.POSIXThreads = 1;
1115 
1116   llvm::StringRef Vis = getLastArgValue(Args, OPT_fvisibility,
1117                                         "default");
1118   if (Vis == "default")
1119     Opts.setVisibilityMode(LangOptions::Default);
1120   else if (Vis == "hidden")
1121     Opts.setVisibilityMode(LangOptions::Hidden);
1122   else if (Vis == "protected")
1123     Opts.setVisibilityMode(LangOptions::Protected);
1124   else
1125     Diags.Report(diag::err_drv_invalid_value)
1126       << Args.getLastArg(OPT_fvisibility)->getAsString(Args) << Vis;
1127 
1128   Opts.OverflowChecking = Args.hasArg(OPT_ftrapv);
1129 
1130   // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
1131   // is specified, or -std is set to a conforming mode.
1132   Opts.Trigraphs = !Opts.GNUMode;
1133   if (Args.hasArg(OPT_trigraphs))
1134     Opts.Trigraphs = 1;
1135 
1136   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
1137                                    OPT_fno_dollars_in_identifiers,
1138                                    !Opts.AsmPreprocessor);
1139   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
1140   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
1141   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
1142   if (Args.hasArg(OPT_fno_lax_vector_conversions))
1143       Opts.LaxVectorConversions = 0;
1144   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
1145   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
1146   Opts.Blocks = Args.hasArg(OPT_fblocks);
1147   Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
1148   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
1149   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
1150   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
1151   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
1152   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
1153   Opts.AccessControl = Args.hasArg(OPT_faccess_control);
1154   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
1155   Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
1156   Opts.InstantiationDepth = getLastArgIntValue(Args, OPT_ftemplate_depth, 99,
1157                                                Diags);
1158   Opts.NeXTRuntime = !Args.hasArg(OPT_fgnu_runtime);
1159   Opts.ObjCConstantStringClass = getLastArgValue(Args,
1160                                                  OPT_fconstant_string_class);
1161   Opts.ObjCNonFragileABI = Args.hasArg(OPT_fobjc_nonfragile_abi);
1162   Opts.CatchUndefined = Args.hasArg(OPT_fcatch_undefined_behavior);
1163   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
1164   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
1165   Opts.Static = Args.hasArg(OPT_static_define);
1166   Opts.OptimizeSize = 0;
1167 
1168   // FIXME: Eliminate this dependency.
1169   unsigned Opt =
1170     Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
1171   Opts.Optimize = Opt != 0;
1172 
1173   // This is the __NO_INLINE__ define, which just depends on things like the
1174   // optimization level and -fno-inline, not actually whether the backend has
1175   // inlining enabled.
1176   //
1177   // FIXME: This is affected by other options (-fno-inline).
1178   Opts.NoInline = !Opt;
1179 
1180   unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
1181   switch (SSP) {
1182   default:
1183     Diags.Report(diag::err_drv_invalid_value)
1184       << Args.getLastArg(OPT_stack_protector)->getAsString(Args) << SSP;
1185     break;
1186   case 0: Opts.setStackProtectorMode(LangOptions::SSPOff); break;
1187   case 1: Opts.setStackProtectorMode(LangOptions::SSPOn);  break;
1188   case 2: Opts.setStackProtectorMode(LangOptions::SSPReq); break;
1189   }
1190 }
1191 
1192 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
1193                                   Diagnostic &Diags) {
1194   using namespace cc1options;
1195   Opts.ImplicitPCHInclude = getLastArgValue(Args, OPT_include_pch);
1196   Opts.ImplicitPTHInclude = getLastArgValue(Args, OPT_include_pth);
1197   if (const Arg *A = Args.getLastArg(OPT_token_cache))
1198       Opts.TokenCache = A->getValue(Args);
1199   else
1200     Opts.TokenCache = Opts.ImplicitPTHInclude;
1201   Opts.UsePredefines = !Args.hasArg(OPT_undef);
1202 
1203   // Add macros from the command line.
1204   for (arg_iterator it = Args.filtered_begin(OPT_D, OPT_U),
1205          ie = Args.filtered_end(); it != ie; ++it) {
1206     if (it->getOption().matches(OPT_D))
1207       Opts.addMacroDef(it->getValue(Args));
1208     else
1209       Opts.addMacroUndef(it->getValue(Args));
1210   }
1211 
1212   Opts.MacroIncludes = getAllArgValues(Args, OPT_imacros);
1213 
1214   // Add the ordered list of -includes.
1215   for (arg_iterator it = Args.filtered_begin(OPT_include, OPT_include_pch,
1216                                              OPT_include_pth),
1217          ie = Args.filtered_end(); it != ie; ++it) {
1218     // PCH is handled specially, we need to extra the original include path.
1219     if (it->getOption().matches(OPT_include_pch)) {
1220       std::string OriginalFile =
1221         PCHReader::getOriginalSourceFile(it->getValue(Args), Diags);
1222       if (OriginalFile.empty())
1223         continue;
1224 
1225       Opts.Includes.push_back(OriginalFile);
1226     } else
1227       Opts.Includes.push_back(it->getValue(Args));
1228   }
1229 
1230   for (arg_iterator it = Args.filtered_begin(OPT_remap_file),
1231          ie = Args.filtered_end(); it != ie; ++it) {
1232     std::pair<llvm::StringRef,llvm::StringRef> Split =
1233       llvm::StringRef(it->getValue(Args)).split(';');
1234 
1235     if (Split.second.empty()) {
1236       Diags.Report(diag::err_drv_invalid_remap_file) << it->getAsString(Args);
1237       continue;
1238     }
1239 
1240     Opts.addRemappedFile(Split.first, Split.second);
1241   }
1242 }
1243 
1244 static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
1245                                         ArgList &Args) {
1246   using namespace cc1options;
1247   Opts.ShowCPP = !Args.hasArg(OPT_dM);
1248   Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
1249   Opts.ShowLineMarkers = !Args.hasArg(OPT_P);
1250   Opts.ShowComments = Args.hasArg(OPT_C);
1251   Opts.ShowMacroComments = Args.hasArg(OPT_CC);
1252 }
1253 
1254 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
1255   using namespace cc1options;
1256   Opts.ABI = getLastArgValue(Args, OPT_target_abi);
1257   Opts.CPU = getLastArgValue(Args, OPT_target_cpu);
1258   Opts.Triple = getLastArgValue(Args, OPT_triple);
1259   Opts.Features = getAllArgValues(Args, OPT_target_feature);
1260 
1261   // Use the host triple if unspecified.
1262   if (Opts.Triple.empty())
1263     Opts.Triple = llvm::sys::getHostTriple();
1264 }
1265 
1266 //
1267 
1268 void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
1269                                         const char **ArgBegin,
1270                                         const char **ArgEnd,
1271                                         Diagnostic &Diags) {
1272   // Parse the arguments.
1273   llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
1274   unsigned MissingArgIndex, MissingArgCount;
1275   llvm::OwningPtr<InputArgList> Args(
1276     Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
1277 
1278   // Check for missing argument error.
1279   if (MissingArgCount)
1280     Diags.Report(diag::err_drv_missing_argument)
1281       << Args->getArgString(MissingArgIndex) << MissingArgCount;
1282 
1283   // Issue errors on unknown arguments.
1284   for (arg_iterator it = Args->filtered_begin(OPT_UNKNOWN),
1285          ie = Args->filtered_end(); it != ie; ++it)
1286     Diags.Report(diag::err_drv_unknown_argument) << it->getAsString(*Args);
1287 
1288   ParseAnalyzerArgs(Res.getAnalyzerOpts(), *Args, Diags);
1289   ParseCodeGenArgs(Res.getCodeGenOpts(), *Args, Diags);
1290   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
1291   ParseDiagnosticArgs(Res.getDiagnosticOpts(), *Args, Diags);
1292   FrontendOptions::InputKind DashX =
1293     ParseFrontendArgs(Res.getFrontendOpts(), *Args, Diags);
1294   ParseHeaderSearchArgs(Res.getHeaderSearchOpts(), *Args);
1295   if (DashX != FrontendOptions::IK_AST)
1296     ParseLangArgs(Res.getLangOpts(), *Args, DashX, Diags);
1297   ParsePreprocessorArgs(Res.getPreprocessorOpts(), *Args, Diags);
1298   ParsePreprocessorOutputArgs(Res.getPreprocessorOutputOpts(), *Args);
1299   ParseTargetArgs(Res.getTargetOpts(), *Args);
1300 }
1301