ObjCMT.cpp revision d33884f1e2e3189ee2db75cc72d90ea854f6bc68 
1//===--- ObjCMT.cpp - ObjC Migrate Tool -----------------------------------===//
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 "Transforms.h"
11#include "clang/ARCMigrate/ARCMTActions.h"
12#include "clang/AST/ASTConsumer.h"
13#include "clang/AST/ASTContext.h"
14#include "clang/AST/NSAPI.h"
15#include "clang/AST/ParentMap.h"
16#include "clang/AST/RecursiveASTVisitor.h"
17#include "clang/Basic/FileManager.h"
18#include "clang/Edit/Commit.h"
19#include "clang/Edit/EditedSource.h"
20#include "clang/Edit/EditsReceiver.h"
21#include "clang/Edit/Rewriters.h"
22#include "clang/Frontend/CompilerInstance.h"
23#include "clang/Frontend/MultiplexConsumer.h"
24#include "clang/Lex/PPConditionalDirectiveRecord.h"
25#include "clang/Lex/Preprocessor.h"
26#include "clang/Rewrite/Core/Rewriter.h"
27#include "clang/Analysis/DomainSpecific/CocoaConventions.h"
28#include "clang/StaticAnalyzer/Checkers/ObjCRetainCount.h"
29#include "clang/AST/Attr.h"
30#include "llvm/ADT/SmallString.h"
31
32using namespace clang;
33using namespace arcmt;
34using namespace ento::objc_retain;
35
36namespace {
37
38class ObjCMigrateASTConsumer : public ASTConsumer {
39  enum CF_BRIDGING_KIND {
40    CF_BRIDGING_NONE,
41    CF_BRIDGING_ENABLE,
42    CF_BRIDGING_MAY_INCLUDE
43  };
44
45  void migrateDecl(Decl *D);
46  void migrateObjCInterfaceDecl(ASTContext &Ctx, ObjCContainerDecl *D);
47  void migrateProtocolConformance(ASTContext &Ctx,
48                                  const ObjCImplementationDecl *ImpDecl);
49  void CacheObjCNSIntegerTypedefed(const TypedefDecl *TypedefDcl);
50  bool migrateNSEnumDecl(ASTContext &Ctx, const EnumDecl *EnumDcl,
51                     const TypedefDecl *TypedefDcl);
52  void migrateAllMethodInstaceType(ASTContext &Ctx, ObjCContainerDecl *CDecl);
53  void migrateMethodInstanceType(ASTContext &Ctx, ObjCContainerDecl *CDecl,
54                                 ObjCMethodDecl *OM);
55  bool migrateProperty(ASTContext &Ctx, ObjCContainerDecl *D, ObjCMethodDecl *OM);
56  void migrateNsReturnsInnerPointer(ASTContext &Ctx, ObjCMethodDecl *OM);
57  void migratePropertyNsReturnsInnerPointer(ASTContext &Ctx, ObjCPropertyDecl *P);
58  void migrateFactoryMethod(ASTContext &Ctx, ObjCContainerDecl *CDecl,
59                            ObjCMethodDecl *OM,
60                            ObjCInstanceTypeFamily OIT_Family = OIT_None);
61
62  void migrateCFAnnotation(ASTContext &Ctx, const Decl *Decl);
63  void AddCFAnnotations(ASTContext &Ctx, const CallEffects &CE,
64                        const FunctionDecl *FuncDecl, bool ResultAnnotated);
65  void AddCFAnnotations(ASTContext &Ctx, const CallEffects &CE,
66                        const ObjCMethodDecl *MethodDecl, bool ResultAnnotated);
67
68  void AnnotateImplicitBridging(ASTContext &Ctx);
69
70  CF_BRIDGING_KIND migrateAddFunctionAnnotation(ASTContext &Ctx,
71                                                const FunctionDecl *FuncDecl);
72
73  void migrateARCSafeAnnotation(ASTContext &Ctx, ObjCContainerDecl *CDecl);
74
75  void migrateAddMethodAnnotation(ASTContext &Ctx,
76                                  const ObjCMethodDecl *MethodDecl);
77public:
78  std::string MigrateDir;
79  unsigned ASTMigrateActions;
80  unsigned  FileId;
81  const TypedefDecl *NSIntegerTypedefed;
82  const TypedefDecl *NSUIntegerTypedefed;
83  OwningPtr<NSAPI> NSAPIObj;
84  OwningPtr<edit::EditedSource> Editor;
85  FileRemapper &Remapper;
86  FileManager &FileMgr;
87  const PPConditionalDirectiveRecord *PPRec;
88  Preprocessor &PP;
89  bool IsOutputFile;
90  llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ObjCProtocolDecls;
91  llvm::SmallVector<const Decl *, 8> CFFunctionIBCandidates;
92
93  ObjCMigrateASTConsumer(StringRef migrateDir,
94                         unsigned astMigrateActions,
95                         FileRemapper &remapper,
96                         FileManager &fileMgr,
97                         const PPConditionalDirectiveRecord *PPRec,
98                         Preprocessor &PP,
99                         bool isOutputFile = false)
100  : MigrateDir(migrateDir),
101    ASTMigrateActions(astMigrateActions),
102    FileId(0), NSIntegerTypedefed(0), NSUIntegerTypedefed(0),
103    Remapper(remapper), FileMgr(fileMgr), PPRec(PPRec), PP(PP),
104    IsOutputFile(isOutputFile) { }
105
106protected:
107  virtual void Initialize(ASTContext &Context) {
108    NSAPIObj.reset(new NSAPI(Context));
109    Editor.reset(new edit::EditedSource(Context.getSourceManager(),
110                                        Context.getLangOpts(),
111                                        PPRec, false));
112  }
113
114  virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
115    for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I)
116      migrateDecl(*I);
117    return true;
118  }
119  virtual void HandleInterestingDecl(DeclGroupRef DG) {
120    // Ignore decls from the PCH.
121  }
122  virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef DG) {
123    ObjCMigrateASTConsumer::HandleTopLevelDecl(DG);
124  }
125
126  virtual void HandleTranslationUnit(ASTContext &Ctx);
127};
128
129}
130
131ObjCMigrateAction::ObjCMigrateAction(FrontendAction *WrappedAction,
132                                     StringRef migrateDir,
133                                     unsigned migrateAction)
134  : WrapperFrontendAction(WrappedAction), MigrateDir(migrateDir),
135    ObjCMigAction(migrateAction),
136    CompInst(0) {
137  if (MigrateDir.empty())
138    MigrateDir = "."; // user current directory if none is given.
139}
140
141ASTConsumer *ObjCMigrateAction::CreateASTConsumer(CompilerInstance &CI,
142                                                  StringRef InFile) {
143  PPConditionalDirectiveRecord *
144    PPRec = new PPConditionalDirectiveRecord(CompInst->getSourceManager());
145  CompInst->getPreprocessor().addPPCallbacks(PPRec);
146  ASTConsumer *
147    WrappedConsumer = WrapperFrontendAction::CreateASTConsumer(CI, InFile);
148  ASTConsumer *MTConsumer = new ObjCMigrateASTConsumer(MigrateDir,
149                                                       ObjCMigAction,
150                                                       Remapper,
151                                                    CompInst->getFileManager(),
152                                                       PPRec,
153                                                       CompInst->getPreprocessor());
154  ASTConsumer *Consumers[] = { MTConsumer, WrappedConsumer };
155  return new MultiplexConsumer(Consumers);
156}
157
158bool ObjCMigrateAction::BeginInvocation(CompilerInstance &CI) {
159  Remapper.initFromDisk(MigrateDir, CI.getDiagnostics(),
160                        /*ignoreIfFilesChanges=*/true);
161  CompInst = &CI;
162  CI.getDiagnostics().setIgnoreAllWarnings(true);
163  return true;
164}
165
166namespace {
167class ObjCMigrator : public RecursiveASTVisitor<ObjCMigrator> {
168  ObjCMigrateASTConsumer &Consumer;
169  ParentMap &PMap;
170
171public:
172  ObjCMigrator(ObjCMigrateASTConsumer &consumer, ParentMap &PMap)
173    : Consumer(consumer), PMap(PMap) { }
174
175  bool shouldVisitTemplateInstantiations() const { return false; }
176  bool shouldWalkTypesOfTypeLocs() const { return false; }
177
178  bool VisitObjCMessageExpr(ObjCMessageExpr *E) {
179    if (Consumer.ASTMigrateActions & FrontendOptions::ObjCMT_Literals) {
180      edit::Commit commit(*Consumer.Editor);
181      edit::rewriteToObjCLiteralSyntax(E, *Consumer.NSAPIObj, commit, &PMap);
182      Consumer.Editor->commit(commit);
183    }
184
185    if (Consumer.ASTMigrateActions & FrontendOptions::ObjCMT_Subscripting) {
186      edit::Commit commit(*Consumer.Editor);
187      edit::rewriteToObjCSubscriptSyntax(E, *Consumer.NSAPIObj, commit);
188      Consumer.Editor->commit(commit);
189    }
190
191    return true;
192  }
193
194  bool TraverseObjCMessageExpr(ObjCMessageExpr *E) {
195    // Do depth first; we want to rewrite the subexpressions first so that if
196    // we have to move expressions we will move them already rewritten.
197    for (Stmt::child_range range = E->children(); range; ++range)
198      if (!TraverseStmt(*range))
199        return false;
200
201    return WalkUpFromObjCMessageExpr(E);
202  }
203};
204
205class BodyMigrator : public RecursiveASTVisitor<BodyMigrator> {
206  ObjCMigrateASTConsumer &Consumer;
207  OwningPtr<ParentMap> PMap;
208
209public:
210  BodyMigrator(ObjCMigrateASTConsumer &consumer) : Consumer(consumer) { }
211
212  bool shouldVisitTemplateInstantiations() const { return false; }
213  bool shouldWalkTypesOfTypeLocs() const { return false; }
214
215  bool TraverseStmt(Stmt *S) {
216    PMap.reset(new ParentMap(S));
217    ObjCMigrator(Consumer, *PMap).TraverseStmt(S);
218    return true;
219  }
220};
221}
222
223void ObjCMigrateASTConsumer::migrateDecl(Decl *D) {
224  if (!D)
225    return;
226  if (isa<ObjCMethodDecl>(D))
227    return; // Wait for the ObjC container declaration.
228
229  BodyMigrator(*this).TraverseDecl(D);
230}
231
232static void append_attr(std::string &PropertyString, const char *attr,
233                        bool &LParenAdded) {
234  if (!LParenAdded) {
235    PropertyString += "(";
236    LParenAdded = true;
237  }
238  else
239    PropertyString += ", ";
240  PropertyString += attr;
241}
242
243static
244void MigrateBlockOrFunctionPointerTypeVariable(std::string & PropertyString,
245                                               const std::string& TypeString,
246                                               const char *name) {
247  const char *argPtr = TypeString.c_str();
248  int paren = 0;
249  while (*argPtr) {
250    switch (*argPtr) {
251      case '(':
252        PropertyString += *argPtr;
253        paren++;
254        break;
255      case ')':
256        PropertyString += *argPtr;
257        paren--;
258        break;
259      case '^':
260      case '*':
261        PropertyString += (*argPtr);
262        if (paren == 1) {
263          PropertyString += name;
264          name = "";
265        }
266        break;
267      default:
268        PropertyString += *argPtr;
269        break;
270    }
271    argPtr++;
272  }
273}
274
275
276static void rewriteToObjCProperty(const ObjCMethodDecl *Getter,
277                                  const ObjCMethodDecl *Setter,
278                                  const NSAPI &NS, edit::Commit &commit,
279                                  unsigned LengthOfPrefix,
280                                  bool Atomic) {
281  ASTContext &Context = NS.getASTContext();
282  bool LParenAdded = false;
283  std::string PropertyString = "@property ";
284  if (!Atomic) {
285    PropertyString += "(nonatomic";
286    LParenAdded = true;
287  }
288
289  std::string PropertyNameString = Getter->getNameAsString();
290  StringRef PropertyName(PropertyNameString);
291  if (LengthOfPrefix > 0) {
292    if (!LParenAdded) {
293      PropertyString += "(getter=";
294      LParenAdded = true;
295    }
296    else
297      PropertyString += ", getter=";
298    PropertyString += PropertyNameString;
299  }
300  // Property with no setter may be suggested as a 'readonly' property.
301  if (!Setter) {
302    if (!LParenAdded) {
303      PropertyString += "(readonly";
304      LParenAdded = true;
305    }
306    else
307      append_attr(PropertyString, "readonly", LParenAdded);
308  }
309
310  // Short circuit 'delegate' properties that contain the name "delegate" or
311  // "dataSource", or have exact name "target" to have 'assign' attribute.
312  if (PropertyName.equals("target") ||
313      (PropertyName.find("delegate") != StringRef::npos) ||
314      (PropertyName.find("dataSource") != StringRef::npos)) {
315    QualType QT = Getter->getResultType();
316    if (!QT->isRealType())
317      append_attr(PropertyString, "assign", LParenAdded);
318  }
319  else if (Setter) {
320    const ParmVarDecl *argDecl = *Setter->param_begin();
321    QualType ArgType = Context.getCanonicalType(argDecl->getType());
322    Qualifiers::ObjCLifetime propertyLifetime = ArgType.getObjCLifetime();
323    bool RetainableObject = ArgType->isObjCRetainableType();
324    if (RetainableObject && propertyLifetime == Qualifiers::OCL_Strong) {
325      if (const ObjCObjectPointerType *ObjPtrTy =
326          ArgType->getAs<ObjCObjectPointerType>()) {
327        ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface();
328        if (IDecl &&
329            IDecl->lookupNestedProtocol(&Context.Idents.get("NSCopying")))
330          append_attr(PropertyString, "copy", LParenAdded);
331        else
332          append_attr(PropertyString, "retain", LParenAdded);
333      }
334      else if (ArgType->isBlockPointerType())
335        append_attr(PropertyString, "copy", LParenAdded);
336    } else if (propertyLifetime == Qualifiers::OCL_Weak)
337      // TODO. More precise determination of 'weak' attribute requires
338      // looking into setter's implementation for backing weak ivar.
339      append_attr(PropertyString, "weak", LParenAdded);
340    else if (RetainableObject)
341      append_attr(PropertyString,
342                  ArgType->isBlockPointerType() ? "copy" : "retain", LParenAdded);
343  }
344  if (LParenAdded)
345    PropertyString += ')';
346  QualType RT = Getter->getResultType();
347  if (!isa<TypedefType>(RT)) {
348    // strip off any ARC lifetime qualifier.
349    QualType CanResultTy = Context.getCanonicalType(RT);
350    if (CanResultTy.getQualifiers().hasObjCLifetime()) {
351      Qualifiers Qs = CanResultTy.getQualifiers();
352      Qs.removeObjCLifetime();
353      RT = Context.getQualifiedType(CanResultTy.getUnqualifiedType(), Qs);
354    }
355  }
356  PropertyString += " ";
357  PrintingPolicy SubPolicy(Context.getPrintingPolicy());
358  SubPolicy.SuppressStrongLifetime = true;
359  SubPolicy.SuppressLifetimeQualifiers = true;
360  std::string TypeString = RT.getAsString(SubPolicy);
361  if (LengthOfPrefix > 0) {
362    // property name must strip off "is" and lower case the first character
363    // after that; e.g. isContinuous will become continuous.
364    StringRef PropertyNameStringRef(PropertyNameString);
365    PropertyNameStringRef = PropertyNameStringRef.drop_front(LengthOfPrefix);
366    PropertyNameString = PropertyNameStringRef;
367    bool NoLowering = (isUppercase(PropertyNameString[0]) &&
368                       PropertyNameString.size() > 1 &&
369                       isUppercase(PropertyNameString[1]));
370    if (!NoLowering)
371      PropertyNameString[0] = toLowercase(PropertyNameString[0]);
372  }
373  if (RT->isBlockPointerType() || RT->isFunctionPointerType())
374    MigrateBlockOrFunctionPointerTypeVariable(PropertyString,
375                                              TypeString,
376                                              PropertyNameString.c_str());
377  else {
378    char LastChar = TypeString[TypeString.size()-1];
379    PropertyString += TypeString;
380    if (LastChar != '*')
381      PropertyString += ' ';
382    PropertyString += PropertyNameString;
383  }
384  SourceLocation StartGetterSelectorLoc = Getter->getSelectorStartLoc();
385  Selector GetterSelector = Getter->getSelector();
386
387  SourceLocation EndGetterSelectorLoc =
388    StartGetterSelectorLoc.getLocWithOffset(GetterSelector.getNameForSlot(0).size());
389  commit.replace(CharSourceRange::getCharRange(Getter->getLocStart(),
390                                               EndGetterSelectorLoc),
391                 PropertyString);
392  if (Setter) {
393    SourceLocation EndLoc = Setter->getDeclaratorEndLoc();
394    // Get location past ';'
395    EndLoc = EndLoc.getLocWithOffset(1);
396    SourceLocation BeginOfSetterDclLoc = Setter->getLocStart();
397    // FIXME. This assumes that setter decl; is immediately preceeded by eoln.
398    // It is trying to remove the setter method decl. line entirely.
399    BeginOfSetterDclLoc = BeginOfSetterDclLoc.getLocWithOffset(-1);
400    commit.remove(SourceRange(BeginOfSetterDclLoc, EndLoc));
401  }
402}
403
404void ObjCMigrateASTConsumer::migrateObjCInterfaceDecl(ASTContext &Ctx,
405                                                      ObjCContainerDecl *D) {
406  if (D->isDeprecated())
407    return;
408
409  for (ObjCContainerDecl::method_iterator M = D->meth_begin(), MEnd = D->meth_end();
410       M != MEnd; ++M) {
411    ObjCMethodDecl *Method = (*M);
412    if (Method->isDeprecated())
413      continue;
414    migrateProperty(Ctx, D, Method);
415    if (ASTMigrateActions & FrontendOptions::ObjCMT_Annotation)
416      migrateNsReturnsInnerPointer(Ctx, Method);
417  }
418  for (ObjCContainerDecl::prop_iterator P = D->prop_begin(),
419       E = D->prop_end(); P != E; ++P) {
420    ObjCPropertyDecl *Prop = *P;
421    if ((ASTMigrateActions & FrontendOptions::ObjCMT_Annotation) &&
422        !P->isDeprecated())
423      migratePropertyNsReturnsInnerPointer(Ctx, Prop);
424  }
425}
426
427static bool
428ClassImplementsAllMethodsAndProperties(ASTContext &Ctx,
429                                      const ObjCImplementationDecl *ImpDecl,
430                                       const ObjCInterfaceDecl *IDecl,
431                                      ObjCProtocolDecl *Protocol) {
432  // In auto-synthesis, protocol properties are not synthesized. So,
433  // a conforming protocol must have its required properties declared
434  // in class interface.
435  bool HasAtleastOneRequiredProperty = false;
436  if (const ObjCProtocolDecl *PDecl = Protocol->getDefinition())
437    for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(),
438         E = PDecl->prop_end(); P != E; ++P) {
439      ObjCPropertyDecl *Property = *P;
440      if (Property->getPropertyImplementation() == ObjCPropertyDecl::Optional)
441        continue;
442      HasAtleastOneRequiredProperty = true;
443      DeclContext::lookup_const_result R = IDecl->lookup(Property->getDeclName());
444      if (R.size() == 0) {
445        // Relax the rule and look into class's implementation for a synthesize
446        // or dynamic declaration. Class is implementing a property coming from
447        // another protocol. This still makes the target protocol as conforming.
448        if (!ImpDecl->FindPropertyImplDecl(
449                                  Property->getDeclName().getAsIdentifierInfo()))
450          return false;
451      }
452      else if (ObjCPropertyDecl *ClassProperty = dyn_cast<ObjCPropertyDecl>(R[0])) {
453          if ((ClassProperty->getPropertyAttributes()
454              != Property->getPropertyAttributes()) ||
455              !Ctx.hasSameType(ClassProperty->getType(), Property->getType()))
456            return false;
457      }
458      else
459        return false;
460    }
461
462  // At this point, all required properties in this protocol conform to those
463  // declared in the class.
464  // Check that class implements the required methods of the protocol too.
465  bool HasAtleastOneRequiredMethod = false;
466  if (const ObjCProtocolDecl *PDecl = Protocol->getDefinition()) {
467    if (PDecl->meth_begin() == PDecl->meth_end())
468      return HasAtleastOneRequiredProperty;
469    for (ObjCContainerDecl::method_iterator M = PDecl->meth_begin(),
470         MEnd = PDecl->meth_end(); M != MEnd; ++M) {
471      ObjCMethodDecl *MD = (*M);
472      if (MD->isImplicit())
473        continue;
474      if (MD->getImplementationControl() == ObjCMethodDecl::Optional)
475        continue;
476      DeclContext::lookup_const_result R = ImpDecl->lookup(MD->getDeclName());
477      if (R.size() == 0)
478        return false;
479      bool match = false;
480      HasAtleastOneRequiredMethod = true;
481      for (unsigned I = 0, N = R.size(); I != N; ++I)
482        if (ObjCMethodDecl *ImpMD = dyn_cast<ObjCMethodDecl>(R[0]))
483          if (Ctx.ObjCMethodsAreEqual(MD, ImpMD)) {
484            match = true;
485            break;
486          }
487      if (!match)
488        return false;
489    }
490  }
491  if (HasAtleastOneRequiredProperty || HasAtleastOneRequiredMethod)
492    return true;
493  return false;
494}
495
496static bool rewriteToObjCInterfaceDecl(const ObjCInterfaceDecl *IDecl,
497                    llvm::SmallVectorImpl<ObjCProtocolDecl*> &ConformingProtocols,
498                    const NSAPI &NS, edit::Commit &commit) {
499  const ObjCList<ObjCProtocolDecl> &Protocols = IDecl->getReferencedProtocols();
500  std::string ClassString;
501  SourceLocation EndLoc =
502  IDecl->getSuperClass() ? IDecl->getSuperClassLoc() : IDecl->getLocation();
503
504  if (Protocols.empty()) {
505    ClassString = '<';
506    for (unsigned i = 0, e = ConformingProtocols.size(); i != e; i++) {
507      ClassString += ConformingProtocols[i]->getNameAsString();
508      if (i != (e-1))
509        ClassString += ", ";
510    }
511    ClassString += "> ";
512  }
513  else {
514    ClassString = ", ";
515    for (unsigned i = 0, e = ConformingProtocols.size(); i != e; i++) {
516      ClassString += ConformingProtocols[i]->getNameAsString();
517      if (i != (e-1))
518        ClassString += ", ";
519    }
520    ObjCInterfaceDecl::protocol_loc_iterator PL = IDecl->protocol_loc_end() - 1;
521    EndLoc = *PL;
522  }
523
524  commit.insertAfterToken(EndLoc, ClassString);
525  return true;
526}
527
528static bool rewriteToNSEnumDecl(const EnumDecl *EnumDcl,
529                                const TypedefDecl *TypedefDcl,
530                                const NSAPI &NS, edit::Commit &commit,
531                                bool IsNSIntegerType,
532                                bool NSOptions) {
533  std::string ClassString;
534  if (NSOptions)
535    ClassString = "typedef NS_OPTIONS(NSUInteger, ";
536  else
537    ClassString =
538      IsNSIntegerType ? "typedef NS_ENUM(NSInteger, "
539                      : "typedef NS_ENUM(NSUInteger, ";
540
541  ClassString += TypedefDcl->getIdentifier()->getName();
542  ClassString += ')';
543  SourceRange R(EnumDcl->getLocStart(), EnumDcl->getLocStart());
544  commit.replace(R, ClassString);
545  SourceLocation EndOfEnumDclLoc = EnumDcl->getLocEnd();
546  EndOfEnumDclLoc = trans::findSemiAfterLocation(EndOfEnumDclLoc,
547                                                 NS.getASTContext(), /*IsDecl*/true);
548  if (!EndOfEnumDclLoc.isInvalid()) {
549    SourceRange EnumDclRange(EnumDcl->getLocStart(), EndOfEnumDclLoc);
550    commit.insertFromRange(TypedefDcl->getLocStart(), EnumDclRange);
551  }
552  else
553    return false;
554
555  SourceLocation EndTypedefDclLoc = TypedefDcl->getLocEnd();
556  EndTypedefDclLoc = trans::findSemiAfterLocation(EndTypedefDclLoc,
557                                                 NS.getASTContext(), /*IsDecl*/true);
558  if (!EndTypedefDclLoc.isInvalid()) {
559    SourceRange TDRange(TypedefDcl->getLocStart(), EndTypedefDclLoc);
560    commit.remove(TDRange);
561  }
562  else
563    return false;
564
565  EndOfEnumDclLoc = trans::findLocationAfterSemi(EnumDcl->getLocEnd(), NS.getASTContext(),
566                                                 /*IsDecl*/true);
567  if (!EndOfEnumDclLoc.isInvalid()) {
568    SourceLocation BeginOfEnumDclLoc = EnumDcl->getLocStart();
569    // FIXME. This assumes that enum decl; is immediately preceeded by eoln.
570    // It is trying to remove the enum decl. lines entirely.
571    BeginOfEnumDclLoc = BeginOfEnumDclLoc.getLocWithOffset(-1);
572    commit.remove(SourceRange(BeginOfEnumDclLoc, EndOfEnumDclLoc));
573    return true;
574  }
575  return false;
576}
577
578static void rewriteToNSMacroDecl(const EnumDecl *EnumDcl,
579                                const TypedefDecl *TypedefDcl,
580                                const NSAPI &NS, edit::Commit &commit,
581                                 bool IsNSIntegerType) {
582  std::string ClassString =
583    IsNSIntegerType ? "NS_ENUM(NSInteger, " : "NS_OPTIONS(NSUInteger, ";
584  ClassString += TypedefDcl->getIdentifier()->getName();
585  ClassString += ')';
586  SourceRange R(EnumDcl->getLocStart(), EnumDcl->getLocStart());
587  commit.replace(R, ClassString);
588  SourceLocation TypedefLoc = TypedefDcl->getLocEnd();
589  commit.remove(SourceRange(TypedefLoc, TypedefLoc));
590}
591
592static bool UseNSOptionsMacro(Preprocessor &PP, ASTContext &Ctx,
593                              const EnumDecl *EnumDcl) {
594  bool PowerOfTwo = true;
595  bool AllHexdecimalEnumerator = true;
596  uint64_t MaxPowerOfTwoVal = 0;
597  for (EnumDecl::enumerator_iterator EI = EnumDcl->enumerator_begin(),
598       EE = EnumDcl->enumerator_end(); EI != EE; ++EI) {
599    EnumConstantDecl *Enumerator = (*EI);
600    const Expr *InitExpr = Enumerator->getInitExpr();
601    if (!InitExpr) {
602      PowerOfTwo = false;
603      AllHexdecimalEnumerator = false;
604      continue;
605    }
606    InitExpr = InitExpr->IgnoreParenCasts();
607    if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(InitExpr))
608      if (BO->isShiftOp() || BO->isBitwiseOp())
609        return true;
610
611    uint64_t EnumVal = Enumerator->getInitVal().getZExtValue();
612    if (PowerOfTwo && EnumVal) {
613      if (!llvm::isPowerOf2_64(EnumVal))
614        PowerOfTwo = false;
615      else if (EnumVal > MaxPowerOfTwoVal)
616        MaxPowerOfTwoVal = EnumVal;
617    }
618    if (AllHexdecimalEnumerator && EnumVal) {
619      bool FoundHexdecimalEnumerator = false;
620      SourceLocation EndLoc = Enumerator->getLocEnd();
621      Token Tok;
622      if (!PP.getRawToken(EndLoc, Tok, /*IgnoreWhiteSpace=*/true))
623        if (Tok.isLiteral() && Tok.getLength() > 2) {
624          if (const char *StringLit = Tok.getLiteralData())
625            FoundHexdecimalEnumerator =
626              (StringLit[0] == '0' && (toLowercase(StringLit[1]) == 'x'));
627        }
628      if (!FoundHexdecimalEnumerator)
629        AllHexdecimalEnumerator = false;
630    }
631  }
632  return AllHexdecimalEnumerator || (PowerOfTwo && (MaxPowerOfTwoVal > 2));
633}
634
635void ObjCMigrateASTConsumer::migrateProtocolConformance(ASTContext &Ctx,
636                                            const ObjCImplementationDecl *ImpDecl) {
637  const ObjCInterfaceDecl *IDecl = ImpDecl->getClassInterface();
638  if (!IDecl || ObjCProtocolDecls.empty() || IDecl->isDeprecated())
639    return;
640  // Find all implicit conforming protocols for this class
641  // and make them explicit.
642  llvm::SmallPtrSet<ObjCProtocolDecl *, 8> ExplicitProtocols;
643  Ctx.CollectInheritedProtocols(IDecl, ExplicitProtocols);
644  llvm::SmallVector<ObjCProtocolDecl *, 8> PotentialImplicitProtocols;
645
646  for (llvm::SmallPtrSet<ObjCProtocolDecl*, 32>::iterator I =
647       ObjCProtocolDecls.begin(),
648       E = ObjCProtocolDecls.end(); I != E; ++I)
649    if (!ExplicitProtocols.count(*I))
650      PotentialImplicitProtocols.push_back(*I);
651
652  if (PotentialImplicitProtocols.empty())
653    return;
654
655  // go through list of non-optional methods and properties in each protocol
656  // in the PotentialImplicitProtocols list. If class implements every one of the
657  // methods and properties, then this class conforms to this protocol.
658  llvm::SmallVector<ObjCProtocolDecl*, 8> ConformingProtocols;
659  for (unsigned i = 0, e = PotentialImplicitProtocols.size(); i != e; i++)
660    if (ClassImplementsAllMethodsAndProperties(Ctx, ImpDecl, IDecl,
661                                              PotentialImplicitProtocols[i]))
662      ConformingProtocols.push_back(PotentialImplicitProtocols[i]);
663
664  if (ConformingProtocols.empty())
665    return;
666
667  // Further reduce number of conforming protocols. If protocol P1 is in the list
668  // protocol P2 (P2<P1>), No need to include P1.
669  llvm::SmallVector<ObjCProtocolDecl*, 8> MinimalConformingProtocols;
670  for (unsigned i = 0, e = ConformingProtocols.size(); i != e; i++) {
671    bool DropIt = false;
672    ObjCProtocolDecl *TargetPDecl = ConformingProtocols[i];
673    for (unsigned i1 = 0, e1 = ConformingProtocols.size(); i1 != e1; i1++) {
674      ObjCProtocolDecl *PDecl = ConformingProtocols[i1];
675      if (PDecl == TargetPDecl)
676        continue;
677      if (PDecl->lookupProtocolNamed(
678            TargetPDecl->getDeclName().getAsIdentifierInfo())) {
679        DropIt = true;
680        break;
681      }
682    }
683    if (!DropIt)
684      MinimalConformingProtocols.push_back(TargetPDecl);
685  }
686  edit::Commit commit(*Editor);
687  rewriteToObjCInterfaceDecl(IDecl, MinimalConformingProtocols,
688                             *NSAPIObj, commit);
689  Editor->commit(commit);
690}
691
692void ObjCMigrateASTConsumer::CacheObjCNSIntegerTypedefed(
693                                          const TypedefDecl *TypedefDcl) {
694
695  QualType qt = TypedefDcl->getTypeSourceInfo()->getType();
696  if (NSAPIObj->isObjCNSIntegerType(qt))
697    NSIntegerTypedefed = TypedefDcl;
698  else if (NSAPIObj->isObjCNSUIntegerType(qt))
699    NSUIntegerTypedefed = TypedefDcl;
700}
701
702bool ObjCMigrateASTConsumer::migrateNSEnumDecl(ASTContext &Ctx,
703                                           const EnumDecl *EnumDcl,
704                                           const TypedefDecl *TypedefDcl) {
705  if (!EnumDcl->isCompleteDefinition() || EnumDcl->getIdentifier() ||
706      EnumDcl->isDeprecated())
707    return false;
708  if (!TypedefDcl) {
709    if (NSIntegerTypedefed) {
710      TypedefDcl = NSIntegerTypedefed;
711      NSIntegerTypedefed = 0;
712    }
713    else if (NSUIntegerTypedefed) {
714      TypedefDcl = NSUIntegerTypedefed;
715      NSUIntegerTypedefed = 0;
716    }
717    else
718      return false;
719    unsigned FileIdOfTypedefDcl =
720      PP.getSourceManager().getFileID(TypedefDcl->getLocation()).getHashValue();
721    unsigned FileIdOfEnumDcl =
722      PP.getSourceManager().getFileID(EnumDcl->getLocation()).getHashValue();
723    if (FileIdOfTypedefDcl != FileIdOfEnumDcl)
724      return false;
725  }
726  if (TypedefDcl->isDeprecated())
727    return false;
728
729  QualType qt = TypedefDcl->getTypeSourceInfo()->getType();
730  bool IsNSIntegerType = NSAPIObj->isObjCNSIntegerType(qt);
731  bool IsNSUIntegerType = !IsNSIntegerType && NSAPIObj->isObjCNSUIntegerType(qt);
732
733  if (!IsNSIntegerType && !IsNSUIntegerType) {
734    // Also check for typedef enum {...} TD;
735    if (const EnumType *EnumTy = qt->getAs<EnumType>()) {
736      if (EnumTy->getDecl() == EnumDcl) {
737        bool NSOptions = UseNSOptionsMacro(PP, Ctx, EnumDcl);
738        if (NSOptions) {
739          if (!Ctx.Idents.get("NS_OPTIONS").hasMacroDefinition())
740            return false;
741        }
742        else if (!Ctx.Idents.get("NS_ENUM").hasMacroDefinition())
743          return false;
744        edit::Commit commit(*Editor);
745        rewriteToNSMacroDecl(EnumDcl, TypedefDcl, *NSAPIObj, commit, !NSOptions);
746        Editor->commit(commit);
747        return true;
748      }
749    }
750    return false;
751  }
752
753  // We may still use NS_OPTIONS based on what we find in the enumertor list.
754  bool NSOptions = UseNSOptionsMacro(PP, Ctx, EnumDcl);
755  // NS_ENUM must be available.
756  if (IsNSIntegerType && !Ctx.Idents.get("NS_ENUM").hasMacroDefinition())
757    return false;
758  // NS_OPTIONS must be available.
759  if (IsNSUIntegerType && !Ctx.Idents.get("NS_OPTIONS").hasMacroDefinition())
760    return false;
761  edit::Commit commit(*Editor);
762  bool Res = rewriteToNSEnumDecl(EnumDcl, TypedefDcl, *NSAPIObj,
763                                 commit, IsNSIntegerType, NSOptions);
764  Editor->commit(commit);
765  return Res;
766}
767
768static void ReplaceWithInstancetype(const ObjCMigrateASTConsumer &ASTC,
769                                    ObjCMethodDecl *OM) {
770  SourceRange R;
771  std::string ClassString;
772  if (TypeSourceInfo *TSInfo =  OM->getResultTypeSourceInfo()) {
773    TypeLoc TL = TSInfo->getTypeLoc();
774    R = SourceRange(TL.getBeginLoc(), TL.getEndLoc());
775    ClassString = "instancetype";
776  }
777  else {
778    R = SourceRange(OM->getLocStart(), OM->getLocStart());
779    ClassString = OM->isInstanceMethod() ? '-' : '+';
780    ClassString += " (instancetype)";
781  }
782  edit::Commit commit(*ASTC.Editor);
783  commit.replace(R, ClassString);
784  ASTC.Editor->commit(commit);
785}
786
787static void ReplaceWithClasstype(const ObjCMigrateASTConsumer &ASTC,
788                                    ObjCMethodDecl *OM) {
789  ObjCInterfaceDecl *IDecl = OM->getClassInterface();
790  SourceRange R;
791  std::string ClassString;
792  if (TypeSourceInfo *TSInfo =  OM->getResultTypeSourceInfo()) {
793    TypeLoc TL = TSInfo->getTypeLoc();
794    R = SourceRange(TL.getBeginLoc(), TL.getEndLoc()); {
795      ClassString  = IDecl->getName();
796      ClassString += "*";
797    }
798  }
799  else {
800    R = SourceRange(OM->getLocStart(), OM->getLocStart());
801    ClassString = "+ (";
802    ClassString += IDecl->getName(); ClassString += "*)";
803  }
804  edit::Commit commit(*ASTC.Editor);
805  commit.replace(R, ClassString);
806  ASTC.Editor->commit(commit);
807}
808
809void ObjCMigrateASTConsumer::migrateMethodInstanceType(ASTContext &Ctx,
810                                                       ObjCContainerDecl *CDecl,
811                                                       ObjCMethodDecl *OM) {
812  ObjCInstanceTypeFamily OIT_Family =
813    Selector::getInstTypeMethodFamily(OM->getSelector());
814
815  std::string ClassName;
816  switch (OIT_Family) {
817    case OIT_None:
818      migrateFactoryMethod(Ctx, CDecl, OM);
819      return;
820    case OIT_Array:
821      ClassName = "NSArray";
822      break;
823    case OIT_Dictionary:
824      ClassName = "NSDictionary";
825      break;
826    case OIT_Singleton:
827      migrateFactoryMethod(Ctx, CDecl, OM, OIT_Singleton);
828      return;
829    case OIT_Init:
830      if (OM->getResultType()->isObjCIdType())
831        ReplaceWithInstancetype(*this, OM);
832      return;
833    case OIT_ReturnsSelf:
834      migrateFactoryMethod(Ctx, CDecl, OM, OIT_ReturnsSelf);
835      return;
836  }
837  if (!OM->getResultType()->isObjCIdType())
838    return;
839
840  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
841  if (!IDecl) {
842    if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
843      IDecl = CatDecl->getClassInterface();
844    else if (ObjCImplDecl *ImpDecl = dyn_cast<ObjCImplDecl>(CDecl))
845      IDecl = ImpDecl->getClassInterface();
846  }
847  if (!IDecl ||
848      !IDecl->lookupInheritedClass(&Ctx.Idents.get(ClassName))) {
849    migrateFactoryMethod(Ctx, CDecl, OM);
850    return;
851  }
852  ReplaceWithInstancetype(*this, OM);
853}
854
855static bool TypeIsInnerPointer(QualType T) {
856  if (!T->isAnyPointerType())
857    return false;
858  if (T->isObjCObjectPointerType() || T->isObjCBuiltinType() ||
859      T->isBlockPointerType() || T->isFunctionPointerType() ||
860      ento::coreFoundation::isCFObjectRef(T))
861    return false;
862  // Also, typedef-of-pointer-to-incomplete-struct is something that we assume
863  // is not an innter pointer type.
864  QualType OrigT = T;
865  while (const TypedefType *TD = dyn_cast<TypedefType>(T.getTypePtr()))
866    T = TD->getDecl()->getUnderlyingType();
867  if (OrigT == T || !T->isPointerType())
868    return true;
869  const PointerType* PT = T->getAs<PointerType>();
870  QualType UPointeeT = PT->getPointeeType().getUnqualifiedType();
871  if (UPointeeT->isRecordType()) {
872    const RecordType *RecordTy = UPointeeT->getAs<RecordType>();
873    if (!RecordTy->getDecl()->isCompleteDefinition())
874      return false;
875  }
876  return true;
877}
878
879static bool AttributesMatch(const Decl *Decl1, const Decl *Decl2) {
880  if (Decl1->hasAttrs() != Decl2->hasAttrs())
881    return false;
882
883  if (!Decl1->hasAttrs())
884    return true;
885
886  const AttrVec &Attrs1 = Decl1->getAttrs();
887  const AttrVec &Attrs2 = Decl2->getAttrs();
888  // This list is very small, so this need not be optimized.
889  for (unsigned i = 0, e = Attrs1.size(); i != e; i++) {
890    bool match = false;
891    for (unsigned j = 0, f = Attrs2.size(); j != f; j++) {
892      // Matching attribute kind only. We are not getting into
893      // details of the attributes. For all practical purposes
894      // this is sufficient.
895      if (Attrs1[i]->getKind() == Attrs2[j]->getKind()) {
896        match = true;
897        break;
898      }
899    }
900    if (!match)
901      return false;
902  }
903  return true;
904}
905
906static bool IsValidIdentifier(ASTContext &Ctx,
907                              const char *Name) {
908  if (!isIdentifierHead(Name[0]))
909    return false;
910  std::string NameString = Name;
911  NameString[0] = toLowercase(NameString[0]);
912  IdentifierInfo *II = &Ctx.Idents.get(NameString);
913  return II->getTokenID() ==  tok::identifier;
914}
915
916bool ObjCMigrateASTConsumer::migrateProperty(ASTContext &Ctx,
917                             ObjCContainerDecl *D,
918                             ObjCMethodDecl *Method) {
919  if (Method->isPropertyAccessor() || !Method->isInstanceMethod() ||
920      Method->param_size() != 0)
921    return false;
922  // Is this method candidate to be a getter?
923  QualType GRT = Method->getResultType();
924  if (GRT->isVoidType())
925    return false;
926
927  Selector GetterSelector = Method->getSelector();
928  ObjCInstanceTypeFamily OIT_Family =
929    Selector::getInstTypeMethodFamily(GetterSelector);
930
931  if (OIT_Family != OIT_None)
932    return false;
933
934  IdentifierInfo *getterName = GetterSelector.getIdentifierInfoForSlot(0);
935  Selector SetterSelector =
936  SelectorTable::constructSetterSelector(PP.getIdentifierTable(),
937                                         PP.getSelectorTable(),
938                                         getterName);
939  ObjCMethodDecl *SetterMethod = D->getInstanceMethod(SetterSelector);
940  unsigned LengthOfPrefix = 0;
941  if (!SetterMethod) {
942    // try a different naming convention for getter: isXxxxx
943    StringRef getterNameString = getterName->getName();
944    bool IsPrefix = getterNameString.startswith("is");
945    // Note that we don't want to change an isXXX method of retainable object
946    // type to property (readonly or otherwise).
947    if (IsPrefix && GRT->isObjCRetainableType())
948      return false;
949    if (IsPrefix || getterNameString.startswith("get")) {
950      LengthOfPrefix = (IsPrefix ? 2 : 3);
951      const char *CGetterName = getterNameString.data() + LengthOfPrefix;
952      // Make sure that first character after "is" or "get" prefix can
953      // start an identifier.
954      if (!IsValidIdentifier(Ctx, CGetterName))
955        return false;
956      if (CGetterName[0] && isUppercase(CGetterName[0])) {
957        getterName = &Ctx.Idents.get(CGetterName);
958        SetterSelector =
959        SelectorTable::constructSetterSelector(PP.getIdentifierTable(),
960                                               PP.getSelectorTable(),
961                                               getterName);
962        SetterMethod = D->getInstanceMethod(SetterSelector);
963      }
964    }
965  }
966
967  if (SetterMethod) {
968    if ((ASTMigrateActions & FrontendOptions::ObjCMT_ReadwriteProperty) == 0)
969      return false;
970    if (SetterMethod->isDeprecated() ||
971        !AttributesMatch(Method, SetterMethod))
972      return false;
973
974    // Is this a valid setter, matching the target getter?
975    QualType SRT = SetterMethod->getResultType();
976    if (!SRT->isVoidType())
977      return false;
978    const ParmVarDecl *argDecl = *SetterMethod->param_begin();
979    QualType ArgType = argDecl->getType();
980    if (!Ctx.hasSameUnqualifiedType(ArgType, GRT))
981      return false;
982    edit::Commit commit(*Editor);
983    rewriteToObjCProperty(Method, SetterMethod, *NSAPIObj, commit,
984                          LengthOfPrefix,
985                          (ASTMigrateActions &
986                           FrontendOptions::ObjCMT_AtomicProperty) != 0);
987    Editor->commit(commit);
988    return true;
989  }
990  else if (ASTMigrateActions & FrontendOptions::ObjCMT_ReadonlyProperty) {
991    // Try a non-void method with no argument (and no setter or property of same name
992    // as a 'readonly' property.
993    edit::Commit commit(*Editor);
994    rewriteToObjCProperty(Method, 0 /*SetterMethod*/, *NSAPIObj, commit,
995                          LengthOfPrefix,
996                          (ASTMigrateActions &
997                           FrontendOptions::ObjCMT_AtomicProperty) != 0);
998    Editor->commit(commit);
999    return true;
1000  }
1001  return false;
1002}
1003
1004void ObjCMigrateASTConsumer::migrateNsReturnsInnerPointer(ASTContext &Ctx,
1005                                                          ObjCMethodDecl *OM) {
1006  if (OM->isImplicit() ||
1007      !OM->isInstanceMethod() ||
1008      OM->hasAttr<ObjCReturnsInnerPointerAttr>())
1009    return;
1010
1011  QualType RT = OM->getResultType();
1012  if (!TypeIsInnerPointer(RT) ||
1013      !Ctx.Idents.get("NS_RETURNS_INNER_POINTER").hasMacroDefinition())
1014    return;
1015
1016  edit::Commit commit(*Editor);
1017  commit.insertBefore(OM->getLocEnd(), " NS_RETURNS_INNER_POINTER");
1018  Editor->commit(commit);
1019}
1020
1021void ObjCMigrateASTConsumer::migratePropertyNsReturnsInnerPointer(ASTContext &Ctx,
1022                                                                  ObjCPropertyDecl *P) {
1023  QualType T = P->getType();
1024
1025  if (!TypeIsInnerPointer(T) ||
1026      !Ctx.Idents.get("NS_RETURNS_INNER_POINTER").hasMacroDefinition())
1027    return;
1028  edit::Commit commit(*Editor);
1029  commit.insertBefore(P->getLocEnd(), " NS_RETURNS_INNER_POINTER ");
1030  Editor->commit(commit);
1031}
1032
1033void ObjCMigrateASTConsumer::migrateAllMethodInstaceType(ASTContext &Ctx,
1034                                                 ObjCContainerDecl *CDecl) {
1035  if (CDecl->isDeprecated())
1036    return;
1037
1038  // migrate methods which can have instancetype as their result type.
1039  for (ObjCContainerDecl::method_iterator M = CDecl->meth_begin(),
1040       MEnd = CDecl->meth_end();
1041       M != MEnd; ++M) {
1042    ObjCMethodDecl *Method = (*M);
1043    if (Method->isDeprecated())
1044      continue;
1045    migrateMethodInstanceType(Ctx, CDecl, Method);
1046  }
1047}
1048
1049void ObjCMigrateASTConsumer::migrateFactoryMethod(ASTContext &Ctx,
1050                                                  ObjCContainerDecl *CDecl,
1051                                                  ObjCMethodDecl *OM,
1052                                                  ObjCInstanceTypeFamily OIT_Family) {
1053  if (OM->isInstanceMethod() ||
1054      OM->getResultType() == Ctx.getObjCInstanceType() ||
1055      !OM->getResultType()->isObjCIdType())
1056    return;
1057
1058  // Candidate factory methods are + (id) NaMeXXX : ... which belong to a class
1059  // NSYYYNamE with matching names be at least 3 characters long.
1060  ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl);
1061  if (!IDecl) {
1062    if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
1063      IDecl = CatDecl->getClassInterface();
1064    else if (ObjCImplDecl *ImpDecl = dyn_cast<ObjCImplDecl>(CDecl))
1065      IDecl = ImpDecl->getClassInterface();
1066  }
1067  if (!IDecl)
1068    return;
1069
1070  std::string StringClassName = IDecl->getName();
1071  StringRef LoweredClassName(StringClassName);
1072  std::string StringLoweredClassName = LoweredClassName.lower();
1073  LoweredClassName = StringLoweredClassName;
1074
1075  IdentifierInfo *MethodIdName = OM->getSelector().getIdentifierInfoForSlot(0);
1076  // Handle method with no name at its first selector slot; e.g. + (id):(int)x.
1077  if (!MethodIdName)
1078    return;
1079
1080  std::string MethodName = MethodIdName->getName();
1081  if (OIT_Family == OIT_Singleton || OIT_Family == OIT_ReturnsSelf) {
1082    StringRef STRefMethodName(MethodName);
1083    size_t len = 0;
1084    if (STRefMethodName.startswith("standard"))
1085      len = strlen("standard");
1086    else if (STRefMethodName.startswith("shared"))
1087      len = strlen("shared");
1088    else if (STRefMethodName.startswith("default"))
1089      len = strlen("default");
1090    else
1091      return;
1092    MethodName = STRefMethodName.substr(len);
1093  }
1094  std::string MethodNameSubStr = MethodName.substr(0, 3);
1095  StringRef MethodNamePrefix(MethodNameSubStr);
1096  std::string StringLoweredMethodNamePrefix = MethodNamePrefix.lower();
1097  MethodNamePrefix = StringLoweredMethodNamePrefix;
1098  size_t Ix = LoweredClassName.rfind(MethodNamePrefix);
1099  if (Ix == StringRef::npos)
1100    return;
1101  std::string ClassNamePostfix = LoweredClassName.substr(Ix);
1102  StringRef LoweredMethodName(MethodName);
1103  std::string StringLoweredMethodName = LoweredMethodName.lower();
1104  LoweredMethodName = StringLoweredMethodName;
1105  if (!LoweredMethodName.startswith(ClassNamePostfix))
1106    return;
1107  if (OIT_Family == OIT_ReturnsSelf)
1108    ReplaceWithClasstype(*this, OM);
1109  else
1110    ReplaceWithInstancetype(*this, OM);
1111}
1112
1113static bool IsVoidStarType(QualType Ty) {
1114  if (!Ty->isPointerType())
1115    return false;
1116
1117  while (const TypedefType *TD = dyn_cast<TypedefType>(Ty.getTypePtr()))
1118    Ty = TD->getDecl()->getUnderlyingType();
1119
1120  // Is the type void*?
1121  const PointerType* PT = Ty->getAs<PointerType>();
1122  if (PT->getPointeeType().getUnqualifiedType()->isVoidType())
1123    return true;
1124  return IsVoidStarType(PT->getPointeeType());
1125}
1126
1127/// AuditedType - This routine audits the type AT and returns false if it is one of known
1128/// CF object types or of the "void *" variety. It returns true if we don't care about the type
1129/// such as a non-pointer or pointers which have no ownership issues (such as "int *").
1130static bool AuditedType (QualType AT) {
1131  if (!AT->isAnyPointerType() && !AT->isBlockPointerType())
1132    return true;
1133  // FIXME. There isn't much we can say about CF pointer type; or is there?
1134  if (ento::coreFoundation::isCFObjectRef(AT) ||
1135      IsVoidStarType(AT) ||
1136      // If an ObjC object is type, assuming that it is not a CF function and
1137      // that it is an un-audited function.
1138      AT->isObjCObjectPointerType() || AT->isObjCBuiltinType())
1139    return false;
1140  // All other pointers are assumed audited as harmless.
1141  return true;
1142}
1143
1144void ObjCMigrateASTConsumer::AnnotateImplicitBridging(ASTContext &Ctx) {
1145  if (CFFunctionIBCandidates.empty())
1146    return;
1147  if (!Ctx.Idents.get("CF_IMPLICIT_BRIDGING_ENABLED").hasMacroDefinition()) {
1148    CFFunctionIBCandidates.clear();
1149    FileId = 0;
1150    return;
1151  }
1152  // Insert CF_IMPLICIT_BRIDGING_ENABLE/CF_IMPLICIT_BRIDGING_DISABLED
1153  const Decl *FirstFD = CFFunctionIBCandidates[0];
1154  const Decl *LastFD  =
1155    CFFunctionIBCandidates[CFFunctionIBCandidates.size()-1];
1156  const char *PragmaString = "\nCF_IMPLICIT_BRIDGING_ENABLED\n\n";
1157  edit::Commit commit(*Editor);
1158  commit.insertBefore(FirstFD->getLocStart(), PragmaString);
1159  PragmaString = "\n\nCF_IMPLICIT_BRIDGING_DISABLED\n";
1160  SourceLocation EndLoc = LastFD->getLocEnd();
1161  // get location just past end of function location.
1162  EndLoc = PP.getLocForEndOfToken(EndLoc);
1163  if (isa<FunctionDecl>(LastFD)) {
1164    // For Methods, EndLoc points to the ending semcolon. So,
1165    // not of these extra work is needed.
1166    Token Tok;
1167    // get locaiton of token that comes after end of function.
1168    bool Failed = PP.getRawToken(EndLoc, Tok, /*IgnoreWhiteSpace=*/true);
1169    if (!Failed)
1170      EndLoc = Tok.getLocation();
1171  }
1172  commit.insertAfterToken(EndLoc, PragmaString);
1173  Editor->commit(commit);
1174  FileId = 0;
1175  CFFunctionIBCandidates.clear();
1176}
1177
1178void ObjCMigrateASTConsumer::migrateCFAnnotation(ASTContext &Ctx, const Decl *Decl) {
1179  if (Decl->isDeprecated())
1180    return;
1181
1182  if (Decl->hasAttr<CFAuditedTransferAttr>()) {
1183    assert(CFFunctionIBCandidates.empty() &&
1184           "Cannot have audited functions/methods inside user "
1185           "provided CF_IMPLICIT_BRIDGING_ENABLE");
1186    return;
1187  }
1188
1189  // Finction must be annotated first.
1190  if (const FunctionDecl *FuncDecl = dyn_cast<FunctionDecl>(Decl)) {
1191    CF_BRIDGING_KIND AuditKind = migrateAddFunctionAnnotation(Ctx, FuncDecl);
1192    if (AuditKind == CF_BRIDGING_ENABLE) {
1193      CFFunctionIBCandidates.push_back(Decl);
1194      if (!FileId)
1195        FileId = PP.getSourceManager().getFileID(Decl->getLocation()).getHashValue();
1196    }
1197    else if (AuditKind == CF_BRIDGING_MAY_INCLUDE) {
1198      if (!CFFunctionIBCandidates.empty()) {
1199        CFFunctionIBCandidates.push_back(Decl);
1200        if (!FileId)
1201          FileId = PP.getSourceManager().getFileID(Decl->getLocation()).getHashValue();
1202      }
1203    }
1204    else
1205      AnnotateImplicitBridging(Ctx);
1206  }
1207  else {
1208    migrateAddMethodAnnotation(Ctx, cast<ObjCMethodDecl>(Decl));
1209    AnnotateImplicitBridging(Ctx);
1210  }
1211}
1212
1213void ObjCMigrateASTConsumer::AddCFAnnotations(ASTContext &Ctx,
1214                                              const CallEffects &CE,
1215                                              const FunctionDecl *FuncDecl,
1216                                              bool ResultAnnotated) {
1217  // Annotate function.
1218  if (!ResultAnnotated) {
1219    RetEffect Ret = CE.getReturnValue();
1220    const char *AnnotationString = 0;
1221    if (Ret.getObjKind() == RetEffect::CF) {
1222      if (Ret.isOwned() &&
1223          Ctx.Idents.get("CF_RETURNS_RETAINED").hasMacroDefinition())
1224        AnnotationString = " CF_RETURNS_RETAINED";
1225      else if (Ret.notOwned() &&
1226               Ctx.Idents.get("CF_RETURNS_NOT_RETAINED").hasMacroDefinition())
1227        AnnotationString = " CF_RETURNS_NOT_RETAINED";
1228    }
1229    else if (Ret.getObjKind() == RetEffect::ObjC) {
1230      if (Ret.isOwned() &&
1231          Ctx.Idents.get("NS_RETURNS_RETAINED").hasMacroDefinition())
1232        AnnotationString = " NS_RETURNS_RETAINED";
1233    }
1234
1235    if (AnnotationString) {
1236      edit::Commit commit(*Editor);
1237      commit.insertAfterToken(FuncDecl->getLocEnd(), AnnotationString);
1238      Editor->commit(commit);
1239    }
1240  }
1241  llvm::ArrayRef<ArgEffect> AEArgs = CE.getArgs();
1242  unsigned i = 0;
1243  for (FunctionDecl::param_const_iterator pi = FuncDecl->param_begin(),
1244       pe = FuncDecl->param_end(); pi != pe; ++pi, ++i) {
1245    const ParmVarDecl *pd = *pi;
1246    ArgEffect AE = AEArgs[i];
1247    if (AE == DecRef && !pd->getAttr<CFConsumedAttr>() &&
1248        Ctx.Idents.get("CF_CONSUMED").hasMacroDefinition()) {
1249      edit::Commit commit(*Editor);
1250      commit.insertBefore(pd->getLocation(), "CF_CONSUMED ");
1251      Editor->commit(commit);
1252    }
1253    else if (AE == DecRefMsg && !pd->getAttr<NSConsumedAttr>() &&
1254             Ctx.Idents.get("NS_CONSUMED").hasMacroDefinition()) {
1255      edit::Commit commit(*Editor);
1256      commit.insertBefore(pd->getLocation(), "NS_CONSUMED ");
1257      Editor->commit(commit);
1258    }
1259  }
1260}
1261
1262
1263ObjCMigrateASTConsumer::CF_BRIDGING_KIND
1264  ObjCMigrateASTConsumer::migrateAddFunctionAnnotation(
1265                                                  ASTContext &Ctx,
1266                                                  const FunctionDecl *FuncDecl) {
1267  if (FuncDecl->hasBody())
1268    return CF_BRIDGING_NONE;
1269
1270  CallEffects CE  = CallEffects::getEffect(FuncDecl);
1271  bool FuncIsReturnAnnotated = (FuncDecl->getAttr<CFReturnsRetainedAttr>() ||
1272                                FuncDecl->getAttr<CFReturnsNotRetainedAttr>() ||
1273                                FuncDecl->getAttr<NSReturnsRetainedAttr>() ||
1274                                FuncDecl->getAttr<NSReturnsNotRetainedAttr>() ||
1275                                FuncDecl->getAttr<NSReturnsAutoreleasedAttr>());
1276
1277  // Trivial case of when funciton is annotated and has no argument.
1278  if (FuncIsReturnAnnotated && FuncDecl->getNumParams() == 0)
1279    return CF_BRIDGING_NONE;
1280
1281  bool ReturnCFAudited = false;
1282  if (!FuncIsReturnAnnotated) {
1283    RetEffect Ret = CE.getReturnValue();
1284    if (Ret.getObjKind() == RetEffect::CF &&
1285        (Ret.isOwned() || Ret.notOwned()))
1286      ReturnCFAudited = true;
1287    else if (!AuditedType(FuncDecl->getResultType()))
1288      return CF_BRIDGING_NONE;
1289  }
1290
1291  // At this point result type is audited for potential inclusion.
1292  // Now, how about argument types.
1293  llvm::ArrayRef<ArgEffect> AEArgs = CE.getArgs();
1294  unsigned i = 0;
1295  bool ArgCFAudited = false;
1296  for (FunctionDecl::param_const_iterator pi = FuncDecl->param_begin(),
1297       pe = FuncDecl->param_end(); pi != pe; ++pi, ++i) {
1298    const ParmVarDecl *pd = *pi;
1299    ArgEffect AE = AEArgs[i];
1300    if (AE == DecRef /*CFConsumed annotated*/ || AE == IncRef) {
1301      if (AE == DecRef && !pd->getAttr<CFConsumedAttr>())
1302        ArgCFAudited = true;
1303      else if (AE == IncRef)
1304        ArgCFAudited = true;
1305    }
1306    else {
1307      QualType AT = pd->getType();
1308      if (!AuditedType(AT)) {
1309        AddCFAnnotations(Ctx, CE, FuncDecl, FuncIsReturnAnnotated);
1310        return CF_BRIDGING_NONE;
1311      }
1312    }
1313  }
1314  if (ReturnCFAudited || ArgCFAudited)
1315    return CF_BRIDGING_ENABLE;
1316
1317  return CF_BRIDGING_MAY_INCLUDE;
1318}
1319
1320void ObjCMigrateASTConsumer::migrateARCSafeAnnotation(ASTContext &Ctx,
1321                                                 ObjCContainerDecl *CDecl) {
1322  if (!isa<ObjCInterfaceDecl>(CDecl) || CDecl->isDeprecated())
1323    return;
1324
1325  // migrate methods which can have instancetype as their result type.
1326  for (ObjCContainerDecl::method_iterator M = CDecl->meth_begin(),
1327       MEnd = CDecl->meth_end();
1328       M != MEnd; ++M) {
1329    ObjCMethodDecl *Method = (*M);
1330    migrateCFAnnotation(Ctx, Method);
1331  }
1332}
1333
1334void ObjCMigrateASTConsumer::AddCFAnnotations(ASTContext &Ctx,
1335                                              const CallEffects &CE,
1336                                              const ObjCMethodDecl *MethodDecl,
1337                                              bool ResultAnnotated) {
1338  // Annotate function.
1339  if (!ResultAnnotated) {
1340    RetEffect Ret = CE.getReturnValue();
1341    const char *AnnotationString = 0;
1342    if (Ret.getObjKind() == RetEffect::CF) {
1343      if (Ret.isOwned() &&
1344          Ctx.Idents.get("CF_RETURNS_RETAINED").hasMacroDefinition())
1345        AnnotationString = " CF_RETURNS_RETAINED";
1346      else if (Ret.notOwned() &&
1347               Ctx.Idents.get("CF_RETURNS_NOT_RETAINED").hasMacroDefinition())
1348        AnnotationString = " CF_RETURNS_NOT_RETAINED";
1349    }
1350    else if (Ret.getObjKind() == RetEffect::ObjC) {
1351      ObjCMethodFamily OMF = MethodDecl->getMethodFamily();
1352      switch (OMF) {
1353        case clang::OMF_alloc:
1354        case clang::OMF_new:
1355        case clang::OMF_copy:
1356        case clang::OMF_init:
1357        case clang::OMF_mutableCopy:
1358          break;
1359
1360        default:
1361          if (Ret.isOwned() &&
1362              Ctx.Idents.get("NS_RETURNS_RETAINED").hasMacroDefinition())
1363            AnnotationString = " NS_RETURNS_RETAINED";
1364          break;
1365      }
1366    }
1367
1368    if (AnnotationString) {
1369      edit::Commit commit(*Editor);
1370      commit.insertBefore(MethodDecl->getLocEnd(), AnnotationString);
1371      Editor->commit(commit);
1372    }
1373  }
1374  llvm::ArrayRef<ArgEffect> AEArgs = CE.getArgs();
1375  unsigned i = 0;
1376  for (ObjCMethodDecl::param_const_iterator pi = MethodDecl->param_begin(),
1377       pe = MethodDecl->param_end(); pi != pe; ++pi, ++i) {
1378    const ParmVarDecl *pd = *pi;
1379    ArgEffect AE = AEArgs[i];
1380    if (AE == DecRef && !pd->getAttr<CFConsumedAttr>() &&
1381        Ctx.Idents.get("CF_CONSUMED").hasMacroDefinition()) {
1382      edit::Commit commit(*Editor);
1383      commit.insertBefore(pd->getLocation(), "CF_CONSUMED ");
1384      Editor->commit(commit);
1385    }
1386  }
1387}
1388
1389void ObjCMigrateASTConsumer::migrateAddMethodAnnotation(
1390                                            ASTContext &Ctx,
1391                                            const ObjCMethodDecl *MethodDecl) {
1392  if (MethodDecl->hasBody() || MethodDecl->isImplicit())
1393    return;
1394
1395  CallEffects CE  = CallEffects::getEffect(MethodDecl);
1396  bool MethodIsReturnAnnotated = (MethodDecl->getAttr<CFReturnsRetainedAttr>() ||
1397                                  MethodDecl->getAttr<CFReturnsNotRetainedAttr>() ||
1398                                  MethodDecl->getAttr<NSReturnsRetainedAttr>() ||
1399                                  MethodDecl->getAttr<NSReturnsNotRetainedAttr>() ||
1400                                  MethodDecl->getAttr<NSReturnsAutoreleasedAttr>());
1401
1402  if (CE.getReceiver() ==  DecRefMsg &&
1403      !MethodDecl->getAttr<NSConsumesSelfAttr>() &&
1404      MethodDecl->getMethodFamily() != OMF_init &&
1405      MethodDecl->getMethodFamily() != OMF_release &&
1406      Ctx.Idents.get("NS_CONSUMES_SELF").hasMacroDefinition()) {
1407    edit::Commit commit(*Editor);
1408    commit.insertBefore(MethodDecl->getLocEnd(), " NS_CONSUMES_SELF");
1409    Editor->commit(commit);
1410  }
1411
1412  // Trivial case of when funciton is annotated and has no argument.
1413  if (MethodIsReturnAnnotated &&
1414      (MethodDecl->param_begin() == MethodDecl->param_end()))
1415    return;
1416
1417  if (!MethodIsReturnAnnotated) {
1418    RetEffect Ret = CE.getReturnValue();
1419    if ((Ret.getObjKind() == RetEffect::CF ||
1420         Ret.getObjKind() == RetEffect::ObjC) &&
1421        (Ret.isOwned() || Ret.notOwned())) {
1422      AddCFAnnotations(Ctx, CE, MethodDecl, false);
1423      return;
1424    }
1425    else if (!AuditedType(MethodDecl->getResultType()))
1426      return;
1427  }
1428
1429  // At this point result type is either annotated or audited.
1430  // Now, how about argument types.
1431  llvm::ArrayRef<ArgEffect> AEArgs = CE.getArgs();
1432  unsigned i = 0;
1433  for (ObjCMethodDecl::param_const_iterator pi = MethodDecl->param_begin(),
1434       pe = MethodDecl->param_end(); pi != pe; ++pi, ++i) {
1435    const ParmVarDecl *pd = *pi;
1436    ArgEffect AE = AEArgs[i];
1437    if ((AE == DecRef && !pd->getAttr<CFConsumedAttr>()) || AE == IncRef ||
1438        !AuditedType(pd->getType())) {
1439      AddCFAnnotations(Ctx, CE, MethodDecl, MethodIsReturnAnnotated);
1440      return;
1441    }
1442  }
1443  return;
1444}
1445
1446namespace {
1447
1448class RewritesReceiver : public edit::EditsReceiver {
1449  Rewriter &Rewrite;
1450
1451public:
1452  RewritesReceiver(Rewriter &Rewrite) : Rewrite(Rewrite) { }
1453
1454  virtual void insert(SourceLocation loc, StringRef text) {
1455    Rewrite.InsertText(loc, text);
1456  }
1457  virtual void replace(CharSourceRange range, StringRef text) {
1458    Rewrite.ReplaceText(range.getBegin(), Rewrite.getRangeSize(range), text);
1459  }
1460};
1461
1462}
1463
1464static bool
1465IsReallyASystemHeader(ASTContext &Ctx, const FileEntry *file, FileID FID) {
1466  bool Invalid = false;
1467  const SrcMgr::SLocEntry &SEntry =
1468  Ctx.getSourceManager().getSLocEntry(FID, &Invalid);
1469  if (!Invalid && SEntry.isFile()) {
1470    const SrcMgr::FileInfo &FI = SEntry.getFile();
1471    if (!FI.hasLineDirectives()) {
1472      if (FI.getFileCharacteristic() == SrcMgr::C_ExternCSystem)
1473        return true;
1474      if (FI.getFileCharacteristic() == SrcMgr::C_System) {
1475        // This file is in a system header directory. Continue with commiting change
1476        // only if it is a user specified system directory because user put a
1477        // .system_framework file in the framework directory.
1478        StringRef Directory(file->getDir()->getName());
1479        size_t Ix = Directory.rfind(".framework");
1480        if (Ix == StringRef::npos)
1481          return true;
1482        std::string PatchToSystemFramework = Directory.slice(0, Ix+sizeof(".framework"));
1483        PatchToSystemFramework += ".system_framework";
1484        if (!llvm::sys::fs::exists(PatchToSystemFramework.data()))
1485          return true;
1486      }
1487    }
1488  }
1489  return false;
1490}
1491
1492void ObjCMigrateASTConsumer::HandleTranslationUnit(ASTContext &Ctx) {
1493
1494  TranslationUnitDecl *TU = Ctx.getTranslationUnitDecl();
1495  if (ASTMigrateActions & FrontendOptions::ObjCMT_MigrateDecls) {
1496    for (DeclContext::decl_iterator D = TU->decls_begin(), DEnd = TU->decls_end();
1497         D != DEnd; ++D) {
1498      if (unsigned FID =
1499            PP.getSourceManager().getFileID((*D)->getLocation()).getHashValue())
1500        if (FileId && FileId != FID) {
1501          if (ASTMigrateActions & FrontendOptions::ObjCMT_Annotation)
1502            AnnotateImplicitBridging(Ctx);
1503        }
1504
1505      if (ObjCInterfaceDecl *CDecl = dyn_cast<ObjCInterfaceDecl>(*D))
1506        migrateObjCInterfaceDecl(Ctx, CDecl);
1507      if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(*D))
1508        migrateObjCInterfaceDecl(Ctx, CatDecl);
1509      else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(*D))
1510        ObjCProtocolDecls.insert(PDecl);
1511      else if (const ObjCImplementationDecl *ImpDecl =
1512               dyn_cast<ObjCImplementationDecl>(*D)) {
1513        if (ASTMigrateActions & FrontendOptions::ObjCMT_ProtocolConformance)
1514          migrateProtocolConformance(Ctx, ImpDecl);
1515      }
1516      else if (const EnumDecl *ED = dyn_cast<EnumDecl>(*D)) {
1517        if (!(ASTMigrateActions & FrontendOptions::ObjCMT_NsMacros))
1518          continue;
1519        DeclContext::decl_iterator N = D;
1520        if (++N != DEnd) {
1521          const TypedefDecl *TD = dyn_cast<TypedefDecl>(*N);
1522          if (migrateNSEnumDecl(Ctx, ED, TD) && TD)
1523            D++;
1524        }
1525        else
1526          migrateNSEnumDecl(Ctx, ED, /*TypedefDecl */0);
1527      }
1528      else if (const TypedefDecl *TD = dyn_cast<TypedefDecl>(*D)) {
1529        if (!(ASTMigrateActions & FrontendOptions::ObjCMT_NsMacros))
1530          continue;
1531        DeclContext::decl_iterator N = D;
1532        if (++N == DEnd)
1533          continue;
1534        if (const EnumDecl *ED = dyn_cast<EnumDecl>(*N)) {
1535          if (++N != DEnd)
1536            if (const TypedefDecl *TDF = dyn_cast<TypedefDecl>(*N)) {
1537              // prefer typedef-follows-enum to enum-follows-typedef pattern.
1538              if (migrateNSEnumDecl(Ctx, ED, TDF)) {
1539                ++D; ++D;
1540                CacheObjCNSIntegerTypedefed(TD);
1541                continue;
1542              }
1543            }
1544          if (migrateNSEnumDecl(Ctx, ED, TD)) {
1545            ++D;
1546            continue;
1547          }
1548        }
1549        CacheObjCNSIntegerTypedefed(TD);
1550      }
1551      else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*D)) {
1552        if (ASTMigrateActions & FrontendOptions::ObjCMT_Annotation)
1553          migrateCFAnnotation(Ctx, FD);
1554      }
1555
1556      if (ObjCContainerDecl *CDecl = dyn_cast<ObjCContainerDecl>(*D)) {
1557        // migrate methods which can have instancetype as their result type.
1558        if (ASTMigrateActions & FrontendOptions::ObjCMT_Instancetype)
1559          migrateAllMethodInstaceType(Ctx, CDecl);
1560        // annotate methods with CF annotations.
1561        if (ASTMigrateActions & FrontendOptions::ObjCMT_Annotation)
1562          migrateARCSafeAnnotation(Ctx, CDecl);
1563      }
1564    }
1565    if (ASTMigrateActions & FrontendOptions::ObjCMT_Annotation)
1566      AnnotateImplicitBridging(Ctx);
1567  }
1568
1569  Rewriter rewriter(Ctx.getSourceManager(), Ctx.getLangOpts());
1570  RewritesReceiver Rec(rewriter);
1571  Editor->applyRewrites(Rec);
1572
1573  for (Rewriter::buffer_iterator
1574        I = rewriter.buffer_begin(), E = rewriter.buffer_end(); I != E; ++I) {
1575    FileID FID = I->first;
1576    RewriteBuffer &buf = I->second;
1577    const FileEntry *file = Ctx.getSourceManager().getFileEntryForID(FID);
1578    assert(file);
1579    if (IsReallyASystemHeader(Ctx, file, FID))
1580      continue;
1581    SmallString<512> newText;
1582    llvm::raw_svector_ostream vecOS(newText);
1583    buf.write(vecOS);
1584    vecOS.flush();
1585    llvm::MemoryBuffer *memBuf = llvm::MemoryBuffer::getMemBufferCopy(
1586                   StringRef(newText.data(), newText.size()), file->getName());
1587    SmallString<64> filePath(file->getName());
1588    FileMgr.FixupRelativePath(filePath);
1589    Remapper.remap(filePath.str(), memBuf);
1590  }
1591
1592  if (IsOutputFile) {
1593    Remapper.flushToFile(MigrateDir, Ctx.getDiagnostics());
1594  } else {
1595    Remapper.flushToDisk(MigrateDir, Ctx.getDiagnostics());
1596  }
1597}
1598
1599bool MigrateSourceAction::BeginInvocation(CompilerInstance &CI) {
1600  CI.getDiagnostics().setIgnoreAllWarnings(true);
1601  return true;
1602}
1603
1604ASTConsumer *MigrateSourceAction::CreateASTConsumer(CompilerInstance &CI,
1605                                                  StringRef InFile) {
1606  PPConditionalDirectiveRecord *
1607    PPRec = new PPConditionalDirectiveRecord(CI.getSourceManager());
1608  CI.getPreprocessor().addPPCallbacks(PPRec);
1609  return new ObjCMigrateASTConsumer(CI.getFrontendOpts().OutputFile,
1610                                    FrontendOptions::ObjCMT_MigrateAll,
1611                                    Remapper,
1612                                    CI.getFileManager(),
1613                                    PPRec,
1614                                    CI.getPreprocessor(),
1615                                    /*isOutputFile=*/true);
1616}
1617