Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
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//===-- RewriteModernObjC.cpp - Playground for the code rewriter ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Hacks and fun related to the code rewriter.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Rewrite/Frontend/ASTConsumers.h"
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#include "clang/AST/AST.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/Attr.h"
17
#include "clang/AST/ParentMap.h"
18
#include "clang/Basic/CharInfo.h"
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#include "clang/Basic/Diagnostic.h"
20
#include "clang/Basic/IdentifierTable.h"
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#include "clang/Basic/SourceManager.h"
22
#include "clang/Basic/TargetInfo.h"
23
#include "clang/Config/config.h"
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#include "clang/Lex/Lexer.h"
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#include "clang/Rewrite/Core/Rewriter.h"
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#include "llvm/ADT/DenseSet.h"
27
#include "llvm/ADT/SmallPtrSet.h"
28
#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
31
#include <memory>
32
33
#if CLANG_ENABLE_OBJC_REWRITER
34
35
using namespace clang;
36
using llvm::utostr;
37
38
namespace {
39
  class RewriteModernObjC : public ASTConsumer {
40
  protected:
41
42
    enum {
43
      BLOCK_FIELD_IS_OBJECT   =  3,  /* id, NSObject, __attribute__((NSObject)),
44
                                        block, ... */
45
      BLOCK_FIELD_IS_BLOCK    =  7,  /* a block variable */
46
      BLOCK_FIELD_IS_BYREF    =  8,  /* the on stack structure holding the
47
                                        __block variable */
48
      BLOCK_FIELD_IS_WEAK     = 16,  /* declared __weak, only used in byref copy
49
                                        helpers */
50
      BLOCK_BYREF_CALLER      = 128, /* called from __block (byref) copy/dispose
51
                                        support routines */
52
      BLOCK_BYREF_CURRENT_MAX = 256
53
    };
54
55
    enum {
56
      BLOCK_NEEDS_FREE =        (1 << 24),
57
      BLOCK_HAS_COPY_DISPOSE =  (1 << 25),
58
      BLOCK_HAS_CXX_OBJ =       (1 << 26),
59
      BLOCK_IS_GC =             (1 << 27),
60
      BLOCK_IS_GLOBAL =         (1 << 28),
61
      BLOCK_HAS_DESCRIPTOR =    (1 << 29)
62
    };
63
64
    Rewriter Rewrite;
65
    DiagnosticsEngine &Diags;
66
    const LangOptions &LangOpts;
67
    ASTContext *Context;
68
    SourceManager *SM;
69
    TranslationUnitDecl *TUDecl;
70
    FileID MainFileID;
71
    const char *MainFileStart, *MainFileEnd;
72
    Stmt *CurrentBody;
73
    ParentMap *PropParentMap; // created lazily.
74
    std::string InFileName;
75
    std::unique_ptr<raw_ostream> OutFile;
76
    std::string Preamble;
77
78
    TypeDecl *ProtocolTypeDecl;
79
    VarDecl *GlobalVarDecl;
80
    Expr *GlobalConstructionExp;
81
    unsigned RewriteFailedDiag;
82
    unsigned GlobalBlockRewriteFailedDiag;
83
    // ObjC string constant support.
84
    unsigned NumObjCStringLiterals;
85
    VarDecl *ConstantStringClassReference;
86
    RecordDecl *NSStringRecord;
87
88
    // ObjC foreach break/continue generation support.
89
    int BcLabelCount;
90
91
    unsigned TryFinallyContainsReturnDiag;
92
    // Needed for super.
93
    ObjCMethodDecl *CurMethodDef;
94
    RecordDecl *SuperStructDecl;
95
    RecordDecl *ConstantStringDecl;
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97
    FunctionDecl *MsgSendFunctionDecl;
98
    FunctionDecl *MsgSendSuperFunctionDecl;
99
    FunctionDecl *MsgSendStretFunctionDecl;
100
    FunctionDecl *MsgSendSuperStretFunctionDecl;
101
    FunctionDecl *MsgSendFpretFunctionDecl;
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    FunctionDecl *GetClassFunctionDecl;
103
    FunctionDecl *GetMetaClassFunctionDecl;
104
    FunctionDecl *GetSuperClassFunctionDecl;
105
    FunctionDecl *SelGetUidFunctionDecl;
106
    FunctionDecl *CFStringFunctionDecl;
107
    FunctionDecl *SuperConstructorFunctionDecl;
108
    FunctionDecl *CurFunctionDef;
109
110
    /* Misc. containers needed for meta-data rewrite. */
111
    SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
112
    SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
113
    llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
114
    llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
115
    llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCWrittenInterfaces;
116
    llvm::SmallPtrSet<TagDecl*, 32> GlobalDefinedTags;
117
    SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
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    /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
119
    SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
120
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    /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
122
    SmallVector<ObjCCategoryDecl *, 8> DefinedNonLazyCategories;
123
124
    SmallVector<Stmt *, 32> Stmts;
125
    SmallVector<int, 8> ObjCBcLabelNo;
126
    // Remember all the @protocol(<expr>) expressions.
127
    llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
128
129
    llvm::DenseSet<uint64_t> CopyDestroyCache;
130
131
    // Block expressions.
132
    SmallVector<BlockExpr *, 32> Blocks;
133
    SmallVector<int, 32> InnerDeclRefsCount;
134
    SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
135
136
    SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
137
138
    // Block related declarations.
139
    SmallVector<ValueDecl *, 8> BlockByCopyDecls;
140
    llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
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    SmallVector<ValueDecl *, 8> BlockByRefDecls;
142
    llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
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    llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
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    llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
145
    llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
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147
    llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
148
    llvm::DenseMap<ObjCInterfaceDecl *,
149
                    llvm::SmallSetVector<ObjCIvarDecl *, 8> > ReferencedIvars;
150
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    // ivar bitfield grouping containers
152
    llvm::DenseSet<const ObjCInterfaceDecl *> ObjCInterefaceHasBitfieldGroups;
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    llvm::DenseMap<const ObjCIvarDecl* , unsigned> IvarGroupNumber;
154
    // This container maps an <class, group number for ivar> tuple to the type
155
    // of the struct where the bitfield belongs.
156
    llvm::DenseMap<std::pair<const ObjCInterfaceDecl*, unsigned>, QualType> GroupRecordType;
157
    SmallVector<FunctionDecl*, 32> FunctionDefinitionsSeen;
158
159
    // This maps an original source AST to it's rewritten form. This allows
160
    // us to avoid rewriting the same node twice (which is very uncommon).
161
    // This is needed to support some of the exotic property rewriting.
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    llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
163
164
    // Needed for header files being rewritten
165
    bool IsHeader;
166
    bool SilenceRewriteMacroWarning;
167
    bool GenerateLineInfo;
168
    bool objc_impl_method;
169
170
    bool DisableReplaceStmt;
171
    class DisableReplaceStmtScope {
172
      RewriteModernObjC &R;
173
      bool SavedValue;
174
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    public:
176
      DisableReplaceStmtScope(RewriteModernObjC &R)
177
130
        : R(R), SavedValue(R.DisableReplaceStmt) {
178
130
        R.DisableReplaceStmt = true;
179
130
      }
180
130
      ~DisableReplaceStmtScope() {
181
130
        R.DisableReplaceStmt = SavedValue;
182
130
      }
183
    };
184
    void InitializeCommon(ASTContext &context);
185
186
  public:
187
    llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
188
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    // Top Level Driver code.
190
584
    bool HandleTopLevelDecl(DeclGroupRef D) override {
191
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      for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; 
++I414
) {
192
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        if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
193
157
          if (!Class->isThisDeclarationADefinition()) {
194
11
            RewriteForwardClassDecl(D);
195
11
            break;
196
146
          } else {
197
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            // Keep track of all interface declarations seen.
198
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            ObjCInterfacesSeen.push_back(Class);
199
146
            break;
200
146
          }
201
510
        }
202
510
203
510
        if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
204
18
          if (!Proto->isThisDeclarationADefinition()) {
205
2
            RewriteForwardProtocolDecl(D);
206
2
            break;
207
2
          }
208
508
        }
209
508
210
508
        if (FunctionDecl *FDecl = dyn_cast<FunctionDecl>(*I)) {
211
172
          // Under modern abi, we cannot translate body of the function
212
172
          // yet until all class extensions and its implementation is seen.
213
172
          // This is because they may introduce new bitfields which must go
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          // into their grouping struct.
215
172
          if (FDecl->isThisDeclarationADefinition() &&
216
172
              // Not c functions defined inside an objc container.
217
172
              
!FDecl->isTopLevelDeclInObjCContainer()96
) {
218
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            FunctionDefinitionsSeen.push_back(FDecl);
219
94
            break;
220
94
          }
221
414
        }
222
414
        HandleTopLevelSingleDecl(*I);
223
414
      }
224
584
      return true;
225
584
    }
226
227
1
    void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override {
228
2
      for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; 
++I1
) {
229
1
        if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(*I)) {
230
1
          if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
231
1
            RewriteBlockPointerDecl(TD);
232
0
          else if (TD->getUnderlyingType()->isFunctionPointerType())
233
0
            CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
234
0
          else
235
0
            RewriteObjCQualifiedInterfaceTypes(TD);
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1
        }
237
1
      }
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1
    }
239
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    void HandleTopLevelSingleDecl(Decl *D);
241
    void HandleDeclInMainFile(Decl *D);
242
    RewriteModernObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
243
                      DiagnosticsEngine &D, const LangOptions &LOpts,
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                      bool silenceMacroWarn, bool LineInfo);
245
246
78
    ~RewriteModernObjC() override {}
247
248
    void HandleTranslationUnit(ASTContext &C) override;
249
250
278
    void ReplaceStmt(Stmt *Old, Stmt *New) {
251
278
      ReplaceStmtWithRange(Old, New, Old->getSourceRange());
252
278
    }
253
254
408
    void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
255
408
      assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's");
256
408
257
408
      Stmt *ReplacingStmt = ReplacedNodes[Old];
258
408
      if (ReplacingStmt)
259
0
        return; // We can't rewrite the same node twice.
260
408
261
408
      if (DisableReplaceStmt)
262
16
        return;
263
392
264
392
      // Measure the old text.
265
392
      int Size = Rewrite.getRangeSize(SrcRange);
266
392
      if (Size == -1) {
267
0
        Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
268
0
            << Old->getSourceRange();
269
0
        return;
270
0
      }
271
392
      // Get the new text.
272
392
      std::string SStr;
273
392
      llvm::raw_string_ostream S(SStr);
274
392
      New->printPretty(S, nullptr, PrintingPolicy(LangOpts));
275
392
      const std::string &Str = S.str();
276
392
277
392
      // If replacement succeeded or warning disabled return with no warning.
278
392
      if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
279
392
        ReplacedNodes[Old] = New;
280
392
        return;
281
392
      }
282
0
      if (SilenceRewriteMacroWarning)
283
0
        return;
284
0
      Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
285
0
          << Old->getSourceRange();
286
0
    }
287
288
    void InsertText(SourceLocation Loc, StringRef Str,
289
870
                    bool InsertAfter = true) {
290
870
      // If insertion succeeded or warning disabled return with no warning.
291
870
      if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
292
870
          
SilenceRewriteMacroWarning0
)
293
870
        return;
294
0
295
0
      Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
296
0
    }
297
298
    void ReplaceText(SourceLocation Start, unsigned OrigLength,
299
714
                     StringRef Str) {
300
714
      // If removal succeeded or warning disabled return with no warning.
301
714
      if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
302
714
          
SilenceRewriteMacroWarning0
)
303
714
        return;
304
0
305
0
      Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
306
0
    }
307
308
    // Syntactic Rewriting.
309
    void RewriteRecordBody(RecordDecl *RD);
310
    void RewriteInclude();
311
    void RewriteLineDirective(const Decl *D);
312
    void ConvertSourceLocationToLineDirective(SourceLocation Loc,
313
                                              std::string &LineString);
314
    void RewriteForwardClassDecl(DeclGroupRef D);
315
    void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
316
    void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
317
                                     const std::string &typedefString);
318
    void RewriteImplementations();
319
    void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
320
                                 ObjCImplementationDecl *IMD,
321
                                 ObjCCategoryImplDecl *CID);
322
    void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
323
    void RewriteImplementationDecl(Decl *Dcl);
324
    void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
325
                               ObjCMethodDecl *MDecl, std::string &ResultStr);
326
    void RewriteTypeIntoString(QualType T, std::string &ResultStr,
327
                               const FunctionType *&FPRetType);
328
    void RewriteByRefString(std::string &ResultStr, const std::string &Name,
329
                            ValueDecl *VD, bool def=false);
330
    void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
331
    void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
332
    void RewriteForwardProtocolDecl(DeclGroupRef D);
333
    void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
334
    void RewriteMethodDeclaration(ObjCMethodDecl *Method);
335
    void RewriteProperty(ObjCPropertyDecl *prop);
336
    void RewriteFunctionDecl(FunctionDecl *FD);
337
    void RewriteBlockPointerType(std::string& Str, QualType Type);
338
    void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
339
    void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
340
    void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
341
    void RewriteTypeOfDecl(VarDecl *VD);
342
    void RewriteObjCQualifiedInterfaceTypes(Expr *E);
343
344
    std::string getIvarAccessString(ObjCIvarDecl *D);
345
346
    // Expression Rewriting.
347
    Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
348
    Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
349
    Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
350
    Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
351
    Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
352
    Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
353
    Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
354
    Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
355
    Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
356
    Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
357
    Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
358
    Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
359
    Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
360
    Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt  *S);
361
    Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
362
    Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
363
    Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
364
                                       SourceLocation OrigEnd);
365
    Stmt *RewriteBreakStmt(BreakStmt *S);
366
    Stmt *RewriteContinueStmt(ContinueStmt *S);
367
    void RewriteCastExpr(CStyleCastExpr *CE);
368
    void RewriteImplicitCastObjCExpr(CastExpr *IE);
369
370
    // Computes ivar bitfield group no.
371
    unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
372
    // Names field decl. for ivar bitfield group.
373
    void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
374
    // Names struct type for ivar bitfield group.
375
    void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
376
    // Names symbol for ivar bitfield group field offset.
377
    void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
378
    // Given an ivar bitfield, it builds (or finds) its group record type.
379
    QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
380
    QualType SynthesizeBitfieldGroupStructType(
381
                                    ObjCIvarDecl *IV,
382
                                    SmallVectorImpl<ObjCIvarDecl *> &IVars);
383
384
    // Block rewriting.
385
    void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
386
387
    // Block specific rewrite rules.
388
    void RewriteBlockPointerDecl(NamedDecl *VD);
389
    void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
390
    Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
391
    Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
392
    void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
393
394
    void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
395
                                      std::string &Result);
396
397
    void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
398
    bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
399
                                 bool &IsNamedDefinition);
400
    void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
401
                                              std::string &Result);
402
403
    bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
404
405
    void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
406
                                  std::string &Result);
407
408
    void Initialize(ASTContext &context) override;
409
410
    // Misc. AST transformation routines. Sometimes they end up calling
411
    // rewriting routines on the new ASTs.
412
    CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
413
                                           ArrayRef<Expr *> Args,
414
                                           SourceLocation StartLoc=SourceLocation(),
415
                                           SourceLocation EndLoc=SourceLocation());
416
417
    Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
418
                                        QualType returnType,
419
                                        SmallVectorImpl<QualType> &ArgTypes,
420
                                        SmallVectorImpl<Expr*> &MsgExprs,
421
                                        ObjCMethodDecl *Method);
422
423
    Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
424
                           SourceLocation StartLoc=SourceLocation(),
425
                           SourceLocation EndLoc=SourceLocation());
426
427
    void SynthCountByEnumWithState(std::string &buf);
428
    void SynthMsgSendFunctionDecl();
429
    void SynthMsgSendSuperFunctionDecl();
430
    void SynthMsgSendStretFunctionDecl();
431
    void SynthMsgSendFpretFunctionDecl();
432
    void SynthMsgSendSuperStretFunctionDecl();
433
    void SynthGetClassFunctionDecl();
434
    void SynthGetMetaClassFunctionDecl();
435
    void SynthGetSuperClassFunctionDecl();
436
    void SynthSelGetUidFunctionDecl();
437
    void SynthSuperConstructorFunctionDecl();
438
439
    // Rewriting metadata
440
    template<typename MethodIterator>
441
    void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
442
                                    MethodIterator MethodEnd,
443
                                    bool IsInstanceMethod,
444
                                    StringRef prefix,
445
                                    StringRef ClassName,
446
                                    std::string &Result);
447
    void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
448
                                     std::string &Result);
449
    void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
450
                                          std::string &Result);
451
    void RewriteClassSetupInitHook(std::string &Result);
452
453
    void RewriteMetaDataIntoBuffer(std::string &Result);
454
    void WriteImageInfo(std::string &Result);
455
    void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
456
                                             std::string &Result);
457
    void RewriteCategorySetupInitHook(std::string &Result);
458
459
    // Rewriting ivar
460
    void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
461
                                              std::string &Result);
462
    Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
463
464
465
    std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
466
    std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
467
                                      StringRef funcName, std::string Tag);
468
    std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
469
                                      StringRef funcName, std::string Tag);
470
    std::string SynthesizeBlockImpl(BlockExpr *CE,
471
                                    std::string Tag, std::string Desc);
472
    std::string SynthesizeBlockDescriptor(std::string DescTag,
473
                                          std::string ImplTag,
474
                                          int i, StringRef funcName,
475
                                          unsigned hasCopy);
476
    Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
477
    void SynthesizeBlockLiterals(SourceLocation FunLocStart,
478
                                 StringRef FunName);
479
    FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
480
    Stmt *SynthBlockInitExpr(BlockExpr *Exp,
481
                      const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
482
483
    // Misc. helper routines.
484
    QualType getProtocolType();
485
    void WarnAboutReturnGotoStmts(Stmt *S);
486
    void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
487
    void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
488
    void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
489
490
    bool IsDeclStmtInForeachHeader(DeclStmt *DS);
491
    void CollectBlockDeclRefInfo(BlockExpr *Exp);
492
    void GetBlockDeclRefExprs(Stmt *S);
493
    void GetInnerBlockDeclRefExprs(Stmt *S,
494
                SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
495
                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
496
497
    // We avoid calling Type::isBlockPointerType(), since it operates on the
498
    // canonical type. We only care if the top-level type is a closure pointer.
499
1.32k
    bool isTopLevelBlockPointerType(QualType T) {
500
1.32k
      return isa<BlockPointerType>(T);
501
1.32k
    }
502
503
    /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
504
    /// to a function pointer type and upon success, returns true; false
505
    /// otherwise.
506
709
    bool convertBlockPointerToFunctionPointer(QualType &T) {
507
709
      if (isTopLevelBlockPointerType(T)) {
508
22
        const BlockPointerType *BPT = T->getAs<BlockPointerType>();
509
22
        T = Context->getPointerType(BPT->getPointeeType());
510
22
        return true;
511
22
      }
512
687
      return false;
513
687
    }
514
515
    bool convertObjCTypeToCStyleType(QualType &T);
516
517
    bool needToScanForQualifiers(QualType T);
518
    QualType getSuperStructType();
519
    QualType getConstantStringStructType();
520
    QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
521
522
529
    void convertToUnqualifiedObjCType(QualType &T) {
523
529
      if (T->isObjCQualifiedIdType()) {
524
15
        bool isConst = T.isConstQualified();
525
15
        T = isConst ? 
Context->getObjCIdType().withConst()2
526
15
                    : 
Context->getObjCIdType()13
;
527
15
      }
528
514
      else if (T->isObjCQualifiedClassType())
529
0
        T = Context->getObjCClassType();
530
514
      else if (T->isObjCObjectPointerType() &&
531
514
               
T->getPointeeType()->isObjCQualifiedInterfaceType()136
) {
532
18
        if (const ObjCObjectPointerType * OBJPT =
533
18
              T->getAsObjCInterfacePointerType()) {
534
18
          const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
535
18
          T = QualType(IFaceT, 0);
536
18
          T = Context->getPointerType(T);
537
18
        }
538
18
     }
539
529
    }
540
541
    // FIXME: This predicate seems like it would be useful to add to ASTContext.
542
36
    bool isObjCType(QualType T) {
543
36
      if (!LangOpts.ObjC)
544
0
        return false;
545
36
546
36
      QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
547
36
548
36
      if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
549
36
          
OCT == Context->getCanonicalType(Context->getObjCClassType())33
)
550
3
        return true;
551
33
552
33
      if (const PointerType *PT = OCT->getAs<PointerType>()) {
553
2
        if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
554
2
            PT->getPointeeType()->isObjCQualifiedIdType())
555
0
          return true;
556
33
      }
557
33
      return false;
558
33
    }
559
560
    bool PointerTypeTakesAnyBlockArguments(QualType QT);
561
    bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
562
    void GetExtentOfArgList(const char *Name, const char *&LParen,
563
                            const char *&RParen);
564
565
180
    void QuoteDoublequotes(std::string &From, std::string &To) {
566
2.41k
      for (unsigned i = 0; i < From.length(); 
i++2.23k
) {
567
2.23k
        if (From[i] == '"')
568
260
          To += "\\\"";
569
1.97k
        else
570
1.97k
          To += From[i];
571
2.23k
      }
572
180
    }
573
574
    QualType getSimpleFunctionType(QualType result,
575
                                   ArrayRef<QualType> args,
576
404
                                   bool variadic = false) {
577
404
      if (result == Context->getObjCInstanceType())
578
0
        result =  Context->getObjCIdType();
579
404
      FunctionProtoType::ExtProtoInfo fpi;
580
404
      fpi.Variadic = variadic;
581
404
      return Context->getFunctionType(result, args, fpi);
582
404
    }
583
584
    // Helper function: create a CStyleCastExpr with trivial type source info.
585
    CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
586
909
                                             CastKind Kind, Expr *E) {
587
909
      TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
588
909
      return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, nullptr,
589
909
                                    TInfo, SourceLocation(), SourceLocation());
590
909
    }
591
592
93
    bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
593
93
      IdentifierInfo* II = &Context->Idents.get("load");
594
93
      Selector LoadSel = Context->Selectors.getSelector(0, &II);
595
93
      return OD->getClassMethod(LoadSel) != nullptr;
596
93
    }
597
598
217
    StringLiteral *getStringLiteral(StringRef Str) {
599
217
      QualType StrType = Context->getConstantArrayType(
600
217
          Context->CharTy, llvm::APInt(32, Str.size() + 1), ArrayType::Normal,
601
217
          0);
602
217
      return StringLiteral::Create(*Context, Str, StringLiteral::Ascii,
603
217
                                   /*Pascal=*/false, StrType, SourceLocation());
604
217
    }
605
  };
606
} // end anonymous namespace
607
608
void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
609
192
                                                   NamedDecl *D) {
610
192
  if (const FunctionProtoType *fproto
611
169
      = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
612
169
    for (const auto &I : fproto->param_types())
613
114
      if (isTopLevelBlockPointerType(I)) {
614
26
        // All the args are checked/rewritten. Don't call twice!
615
26
        RewriteBlockPointerDecl(D);
616
26
        break;
617
26
      }
618
169
  }
619
192
}
620
621
2
void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
622
2
  const PointerType *PT = funcType->getAs<PointerType>();
623
2
  if (PT && PointerTypeTakesAnyBlockArguments(funcType))
624
0
    RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
625
2
}
626
627
78
static bool IsHeaderFile(const std::string &Filename) {
628
78
  std::string::size_type DotPos = Filename.rfind('.');
629
78
630
78
  if (DotPos == std::string::npos) {
631
0
    // no file extension
632
0
    return false;
633
0
  }
634
78
635
78
  std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
636
78
  // C header: .h
637
78
  // C++ header: .hh or .H;
638
78
  return Ext == "h" || Ext == "hh" || Ext == "H";
639
78
}
640
641
RewriteModernObjC::RewriteModernObjC(std::string inFile,
642
                                     std::unique_ptr<raw_ostream> OS,
643
                                     DiagnosticsEngine &D,
644
                                     const LangOptions &LOpts,
645
                                     bool silenceMacroWarn, bool LineInfo)
646
    : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
647
78
      SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
648
78
  IsHeader = IsHeaderFile(inFile);
649
78
  RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
650
78
               "rewriting sub-expression within a macro (may not be correct)");
651
78
  // FIXME. This should be an error. But if block is not called, it is OK. And it
652
78
  // may break including some headers.
653
78
  GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
654
78
    "rewriting block literal declared in global scope is not implemented");
655
78
656
78
  TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
657
78
               DiagnosticsEngine::Warning,
658
78
               "rewriter doesn't support user-specified control flow semantics "
659
78
               "for @try/@finally (code may not execute properly)");
660
78
}
661
662
std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
663
    const std::string &InFile, std::unique_ptr<raw_ostream> OS,
664
    DiagnosticsEngine &Diags, const LangOptions &LOpts,
665
78
    bool SilenceRewriteMacroWarning, bool LineInfo) {
666
78
  return llvm::make_unique<RewriteModernObjC>(InFile, std::move(OS), Diags,
667
78
                                              LOpts, SilenceRewriteMacroWarning,
668
78
                                              LineInfo);
669
78
}
670
671
78
void RewriteModernObjC::InitializeCommon(ASTContext &context) {
672
78
  Context = &context;
673
78
  SM = &Context->getSourceManager();
674
78
  TUDecl = Context->getTranslationUnitDecl();
675
78
  MsgSendFunctionDecl = nullptr;
676
78
  MsgSendSuperFunctionDecl = nullptr;
677
78
  MsgSendStretFunctionDecl = nullptr;
678
78
  MsgSendSuperStretFunctionDecl = nullptr;
679
78
  MsgSendFpretFunctionDecl = nullptr;
680
78
  GetClassFunctionDecl = nullptr;
681
78
  GetMetaClassFunctionDecl = nullptr;
682
78
  GetSuperClassFunctionDecl = nullptr;
683
78
  SelGetUidFunctionDecl = nullptr;
684
78
  CFStringFunctionDecl = nullptr;
685
78
  ConstantStringClassReference = nullptr;
686
78
  NSStringRecord = nullptr;
687
78
  CurMethodDef = nullptr;
688
78
  CurFunctionDef = nullptr;
689
78
  GlobalVarDecl = nullptr;
690
78
  GlobalConstructionExp = nullptr;
691
78
  SuperStructDecl = nullptr;
692
78
  ProtocolTypeDecl = nullptr;
693
78
  ConstantStringDecl = nullptr;
694
78
  BcLabelCount = 0;
695
78
  SuperConstructorFunctionDecl = nullptr;
696
78
  NumObjCStringLiterals = 0;
697
78
  PropParentMap = nullptr;
698
78
  CurrentBody = nullptr;
699
78
  DisableReplaceStmt = false;
700
78
  objc_impl_method = false;
701
78
702
78
  // Get the ID and start/end of the main file.
703
78
  MainFileID = SM->getMainFileID();
704
78
  const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
705
78
  MainFileStart = MainBuf->getBufferStart();
706
78
  MainFileEnd = MainBuf->getBufferEnd();
707
78
708
78
  Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
709
78
}
710
711
//===----------------------------------------------------------------------===//
712
// Top Level Driver Code
713
//===----------------------------------------------------------------------===//
714
715
541
void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
716
541
  if (Diags.hasErrorOccurred())
717
0
    return;
718
541
719
541
  // Two cases: either the decl could be in the main file, or it could be in a
720
541
  // #included file.  If the former, rewrite it now.  If the later, check to see
721
541
  // if we rewrote the #include/#import.
722
541
  SourceLocation Loc = D->getLocation();
723
541
  Loc = SM->getExpansionLoc(Loc);
724
541
725
541
  // If this is for a builtin, ignore it.
726
541
  if (Loc.isInvalid()) 
return0
;
727
541
728
541
  // Look for built-in declarations that we need to refer during the rewrite.
729
541
  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
730
192
    RewriteFunctionDecl(FD);
731
349
  } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
732
21
    // declared in <Foundation/NSString.h>
733
21
    if (FVD->getName() == "_NSConstantStringClassReference") {
734
0
      ConstantStringClassReference = FVD;
735
0
      return;
736
0
    }
737
328
  } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
738
14
    RewriteCategoryDecl(CD);
739
314
  } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
740
16
    if (PD->isThisDeclarationADefinition())
741
16
      RewriteProtocolDecl(PD);
742
298
  } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
743
25
    // Recurse into linkage specifications
744
25
    for (DeclContext::decl_iterator DI = LSD->decls_begin(),
745
25
                                 DIEnd = LSD->decls_end();
746
67
         DI != DIEnd; ) {
747
42
      if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
748
11
        if (!IFace->isThisDeclarationADefinition()) {
749
5
          SmallVector<Decl *, 8> DG;
750
5
          SourceLocation StartLoc = IFace->getBeginLoc();
751
21
          do {
752
21
            if (isa<ObjCInterfaceDecl>(*DI) &&
753
21
                
!cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition()20
&&
754
21
                
StartLoc == (*DI)->getBeginLoc()19
)
755
16
              DG.push_back(*DI);
756
5
            else
757
5
              break;
758
16
759
16
            ++DI;
760
16
          } while (DI != DIEnd);
761
5
          RewriteForwardClassDecl(DG);
762
5
          continue;
763
5
        }
764
6
        else {
765
6
          // Keep track of all interface declarations seen.
766
6
          ObjCInterfacesSeen.push_back(IFace);
767
6
          ++DI;
768
6
          continue;
769
6
        }
770
31
      }
771
31
772
31
      if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
773
0
        if (!Proto->isThisDeclarationADefinition()) {
774
0
          SmallVector<Decl *, 8> DG;
775
0
          SourceLocation StartLoc = Proto->getBeginLoc();
776
0
          do {
777
0
            if (isa<ObjCProtocolDecl>(*DI) &&
778
0
                !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
779
0
                StartLoc == (*DI)->getBeginLoc())
780
0
              DG.push_back(*DI);
781
0
            else
782
0
              break;
783
0
784
0
            ++DI;
785
0
          } while (DI != DIEnd);
786
0
          RewriteForwardProtocolDecl(DG);
787
0
          continue;
788
0
        }
789
31
      }
790
31
791
31
      HandleTopLevelSingleDecl(*DI);
792
31
      ++DI;
793
31
    }
794
25
  }
795
541
  // If we have a decl in the main file, see if we should rewrite it.
796
541
  if (SM->isWrittenInMainFile(Loc))
797
541
    return HandleDeclInMainFile(D);
798
541
}
799
800
//===----------------------------------------------------------------------===//
801
// Syntactic (non-AST) Rewriting Code
802
//===----------------------------------------------------------------------===//
803
804
78
void RewriteModernObjC::RewriteInclude() {
805
78
  SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
806
78
  StringRef MainBuf = SM->getBufferData(MainFileID);
807
78
  const char *MainBufStart = MainBuf.begin();
808
78
  const char *MainBufEnd = MainBuf.end();
809
78
  size_t ImportLen = strlen("import");
810
78
811
78
  // Loop over the whole file, looking for includes.
812
81.0k
  for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; 
++BufPtr80.9k
) {
813
80.9k
    if (*BufPtr == '#') {
814
182
      if (++BufPtr == MainBufEnd)
815
0
        return;
816
354
      
while (182
*BufPtr == ' ' ||
*BufPtr == '\t'182
)
817
172
        if (++BufPtr == MainBufEnd)
818
0
          return;
819
182
      if (!strncmp(BufPtr, "import", ImportLen)) {
820
0
        // replace import with include
821
0
        SourceLocation ImportLoc =
822
0
          LocStart.getLocWithOffset(BufPtr-MainBufStart);
823
0
        ReplaceText(ImportLoc, ImportLen, "include");
824
0
        BufPtr += ImportLen;
825
0
      }
826
182
    }
827
80.9k
  }
828
78
}
829
830
static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
831
438
                                  ObjCIvarDecl *IvarDecl, std::string &Result) {
832
438
  Result += "OBJC_IVAR_$_";
833
438
  Result += IDecl->getName();
834
438
  Result += "$";
835
438
  Result += IvarDecl->getName();
836
438
}
837
838
std::string
839
30
RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
840
30
  const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
841
30
842
30
  // Build name of symbol holding ivar offset.
843
30
  std::string IvarOffsetName;
844
30
  if (D->isBitField())
845
4
    ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
846
26
  else
847
26
    WriteInternalIvarName(ClassDecl, D, IvarOffsetName);
848
30
849
30
  std::string S = "(*(";
850
30
  QualType IvarT = D->getType();
851
30
  if (D->isBitField())
852
4
    IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
853
30
854
30
  if (!isa<TypedefType>(IvarT) && 
IvarT->isRecordType()23
) {
855
4
    RecordDecl *RD = IvarT->getAs<RecordType>()->getDecl();
856
4
    RD = RD->getDefinition();
857
4
    if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
858
0
      // decltype(((Foo_IMPL*)0)->bar) *
859
0
      ObjCContainerDecl *CDecl =
860
0
      dyn_cast<ObjCContainerDecl>(D->getDeclContext());
861
0
      // ivar in class extensions requires special treatment.
862
0
      if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
863
0
        CDecl = CatDecl->getClassInterface();
864
0
      std::string RecName = CDecl->getName();
865
0
      RecName += "_IMPL";
866
0
      RecordDecl *RD =
867
0
          RecordDecl::Create(*Context, TTK_Struct, TUDecl, SourceLocation(),
868
0
                             SourceLocation(), &Context->Idents.get(RecName));
869
0
      QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
870
0
      unsigned UnsignedIntSize =
871
0
      static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
872
0
      Expr *Zero = IntegerLiteral::Create(*Context,
873
0
                                          llvm::APInt(UnsignedIntSize, 0),
874
0
                                          Context->UnsignedIntTy, SourceLocation());
875
0
      Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
876
0
      ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
877
0
                                              Zero);
878
0
      FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
879
0
                                        SourceLocation(),
880
0
                                        &Context->Idents.get(D->getNameAsString()),
881
0
                                        IvarT, nullptr,
882
0
                                        /*BitWidth=*/nullptr, /*Mutable=*/true,
883
0
                                        ICIS_NoInit);
884
0
      MemberExpr *ME = MemberExpr::CreateImplicit(
885
0
          *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
886
0
      IvarT = Context->getDecltypeType(ME, ME->getType());
887
0
    }
888
4
  }
889
30
  convertObjCTypeToCStyleType(IvarT);
890
30
  QualType castT = Context->getPointerType(IvarT);
891
30
  std::string TypeString(castT.getAsString(Context->getPrintingPolicy()));
892
30
  S += TypeString;
893
30
  S += ")";
894
30
895
30
  // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
896
30
  S += "((char *)self + ";
897
30
  S += IvarOffsetName;
898
30
  S += "))";
899
30
  if (D->isBitField()) {
900
4
    S += ".";
901
4
    S += D->getNameAsString();
902
4
  }
903
30
  ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(D);
904
30
  return S;
905
30
}
906
907
/// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
908
/// been found in the class implementation. In this case, it must be synthesized.
909
static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
910
                                             ObjCPropertyDecl *PD,
911
104
                                             bool getter) {
912
104
  return getter ? 
!IMP->getInstanceMethod(PD->getGetterName())56
913
104
                : 
!IMP->getInstanceMethod(PD->getSetterName())48
;
914
104
915
104
}
916
917
void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
918
                                          ObjCImplementationDecl *IMD,
919
31
                                          ObjCCategoryImplDecl *CID) {
920
31
  static bool objcGetPropertyDefined = false;
921
31
  static bool objcSetPropertyDefined = false;
922
31
  SourceLocation startGetterSetterLoc;
923
31
924
31
  if (PID->getBeginLoc().isValid()) {
925
23
    SourceLocation startLoc = PID->getBeginLoc();
926
23
    InsertText(startLoc, "// ");
927
23
    const char *startBuf = SM->getCharacterData(startLoc);
928
23
    assert((*startBuf == '@') && "bogus @synthesize location");
929
23
    const char *semiBuf = strchr(startBuf, ';');
930
23
    assert((*semiBuf == ';') && "@synthesize: can't find ';'");
931
23
    startGetterSetterLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
932
23
  } else
933
8
    startGetterSetterLoc = IMD ? IMD->getEndLoc() : 
CID->getEndLoc()0
;
934
31
935
31
  if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
936
3
    return; // FIXME: is this correct?
937
28
938
28
  // Generate the 'getter' function.
939
28
  ObjCPropertyDecl *PD = PID->getPropertyDecl();
940
28
  ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
941
28
  assert(IMD && OID && "Synthesized ivars must be attached to @implementation");
942
28
943
28
  unsigned Attributes = PD->getPropertyAttributes();
944
28
  if (mustSynthesizeSetterGetterMethod(IMD, PD, true /*getter*/)) {
945
26
    bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
946
26
                          (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
947
22
                                         ObjCPropertyDecl::OBJC_PR_copy));
948
26
    std::string Getr;
949
26
    if (GenGetProperty && 
!objcGetPropertyDefined9
) {
950
5
      objcGetPropertyDefined = true;
951
5
      // FIXME. Is this attribute correct in all cases?
952
5
      Getr = "\nextern \"C\" __declspec(dllimport) "
953
5
            "id objc_getProperty(id, SEL, long, bool);\n";
954
5
    }
955
26
    RewriteObjCMethodDecl(OID->getContainingInterface(),
956
26
                          PD->getGetterMethodDecl(), Getr);
957
26
    Getr += "{ ";
958
26
    // Synthesize an explicit cast to gain access to the ivar.
959
26
    // See objc-act.c:objc_synthesize_new_getter() for details.
960
26
    if (GenGetProperty) {
961
9
      // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
962
9
      Getr += "typedef ";
963
9
      const FunctionType *FPRetType = nullptr;
964
9
      RewriteTypeIntoString(PD->getGetterMethodDecl()->getReturnType(), Getr,
965
9
                            FPRetType);
966
9
      Getr += " _TYPE";
967
9
      if (FPRetType) {
968
1
        Getr += ")"; // close the precedence "scope" for "*".
969
1
970
1
        // Now, emit the argument types (if any).
971
1
        if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
972
1
          Getr += "(";
973
1
          for (unsigned i = 0, e = FT->getNumParams(); i != e; 
++i0
) {
974
0
            if (i) Getr += ", ";
975
0
            std::string ParamStr =
976
0
                FT->getParamType(i).getAsString(Context->getPrintingPolicy());
977
0
            Getr += ParamStr;
978
0
          }
979
1
          if (FT->isVariadic()) {
980
0
            if (FT->getNumParams())
981
0
              Getr += ", ";
982
0
            Getr += "...";
983
0
          }
984
1
          Getr += ")";
985
1
        } else
986
0
          Getr += "()";
987
1
      }
988
9
      Getr += ";\n";
989
9
      Getr += "return (_TYPE)";
990
9
      Getr += "objc_getProperty(self, _cmd, ";
991
9
      RewriteIvarOffsetComputation(OID, Getr);
992
9
      Getr += ", 1)";
993
9
    }
994
17
    else
995
17
      Getr += "return " + getIvarAccessString(OID);
996
26
    Getr += "; }";
997
26
    InsertText(startGetterSetterLoc, Getr);
998
26
  }
999
28
1000
28
  if (PD->isReadOnly() ||
1001
28
      
!mustSynthesizeSetterGetterMethod(IMD, PD, false /*setter*/)24
)
1002
6
    return;
1003
22
1004
22
  // Generate the 'setter' function.
1005
22
  std::string Setr;
1006
22
  bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
1007
22
                                      ObjCPropertyDecl::OBJC_PR_copy);
1008
22
  if (GenSetProperty && 
!objcSetPropertyDefined9
) {
1009
6
    objcSetPropertyDefined = true;
1010
6
    // FIXME. Is this attribute correct in all cases?
1011
6
    Setr = "\nextern \"C\" __declspec(dllimport) "
1012
6
    "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1013
6
  }
1014
22
1015
22
  RewriteObjCMethodDecl(OID->getContainingInterface(),
1016
22
                        PD->getSetterMethodDecl(), Setr);
1017
22
  Setr += "{ ";
1018
22
  // Synthesize an explicit cast to initialize the ivar.
1019
22
  // See objc-act.c:objc_synthesize_new_setter() for details.
1020
22
  if (GenSetProperty) {
1021
9
    Setr += "objc_setProperty (self, _cmd, ";
1022
9
    RewriteIvarOffsetComputation(OID, Setr);
1023
9
    Setr += ", (id)";
1024
9
    Setr += PD->getName();
1025
9
    Setr += ", ";
1026
9
    if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
1027
2
      Setr += "0, ";
1028
7
    else
1029
7
      Setr += "1, ";
1030
9
    if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
1031
4
      Setr += "1)";
1032
5
    else
1033
5
      Setr += "0)";
1034
9
  }
1035
13
  else {
1036
13
    Setr += getIvarAccessString(OID) + " = ";
1037
13
    Setr += PD->getName();
1038
13
  }
1039
22
  Setr += "; }\n";
1040
22
  InsertText(startGetterSetterLoc, Setr);
1041
22
}
1042
1043
static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1044
181
                                       std::string &typedefString) {
1045
181
  typedefString += "\n#ifndef _REWRITER_typedef_";
1046
181
  typedefString += ForwardDecl->getNameAsString();
1047
181
  typedefString += "\n";
1048
181
  typedefString += "#define _REWRITER_typedef_";
1049
181
  typedefString += ForwardDecl->getNameAsString();
1050
181
  typedefString += "\n";
1051
181
  typedefString += "typedef struct objc_object ";
1052
181
  typedefString += ForwardDecl->getNameAsString();
1053
181
  // typedef struct { } _objc_exc_Classname;
1054
181
  typedefString += ";\ntypedef struct {} _objc_exc_";
1055
181
  typedefString += ForwardDecl->getNameAsString();
1056
181
  typedefString += ";\n#endif\n";
1057
181
}
1058
1059
void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1060
16
                                              const std::string &typedefString) {
1061
16
  SourceLocation startLoc = ClassDecl->getBeginLoc();
1062
16
  const char *startBuf = SM->getCharacterData(startLoc);
1063
16
  const char *semiPtr = strchr(startBuf, ';');
1064
16
  // Replace the @class with typedefs corresponding to the classes.
1065
16
  ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
1066
16
}
1067
1068
11
void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1069
11
  std::string typedefString;
1070
26
  for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; 
++I15
) {
1071
15
    if (ObjCInterfaceDecl *ForwardDecl = dyn_cast<ObjCInterfaceDecl>(*I)) {
1072
13
      if (I == D.begin()) {
1073
11
        // Translate to typedef's that forward reference structs with the same name
1074
11
        // as the class. As a convenience, we include the original declaration
1075
11
        // as a comment.
1076
11
        typedefString += "// @class ";
1077
11
        typedefString += ForwardDecl->getNameAsString();
1078
11
        typedefString += ";";
1079
11
      }
1080
13
      RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1081
13
    }
1082
2
    else
1083
2
      HandleTopLevelSingleDecl(*I);
1084
15
  }
1085
11
  DeclGroupRef::iterator I = D.begin();
1086
11
  RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
1087
11
}
1088
1089
void RewriteModernObjC::RewriteForwardClassDecl(
1090
5
                                const SmallVectorImpl<Decl *> &D) {
1091
5
  std::string typedefString;
1092
21
  for (unsigned i = 0; i < D.size(); 
i++16
) {
1093
16
    ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
1094
16
    if (i == 0) {
1095
5
      typedefString += "// @class ";
1096
5
      typedefString += ForwardDecl->getNameAsString();
1097
5
      typedefString += ";";
1098
5
    }
1099
16
    RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1100
16
  }
1101
5
  RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
1102
5
}
1103
1104
210
void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1105
210
  // When method is a synthesized one, such as a getter/setter there is
1106
210
  // nothing to rewrite.
1107
210
  if (Method->isImplicit())
1108
68
    return;
1109
142
  SourceLocation LocStart = Method->getBeginLoc();
1110
142
  SourceLocation LocEnd = Method->getEndLoc();
1111
142
1112
142
  if (SM->getExpansionLineNumber(LocEnd) >
1113
142
      SM->getExpansionLineNumber(LocStart)) {
1114
0
    InsertText(LocStart, "#if 0\n");
1115
0
    ReplaceText(LocEnd, 1, ";\n#endif\n");
1116
142
  } else {
1117
142
    InsertText(LocStart, "// ");
1118
142
  }
1119
142
}
1120
1121
37
void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1122
37
  SourceLocation Loc = prop->getAtLoc();
1123
37
1124
37
  ReplaceText(Loc, 0, "// ");
1125
37
  // FIXME: handle properties that are declared across multiple lines.
1126
37
}
1127
1128
14
void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1129
14
  SourceLocation LocStart = CatDecl->getBeginLoc();
1130
14
1131
14
  // FIXME: handle category headers that are declared across multiple lines.
1132
14
  if (CatDecl->getIvarRBraceLoc().isValid()) {
1133
8
    ReplaceText(LocStart, 1, "/** ");
1134
8
    ReplaceText(CatDecl->getIvarRBraceLoc(), 1, "**/ ");
1135
8
  }
1136
6
  else {
1137
6
    ReplaceText(LocStart, 0, "// ");
1138
6
  }
1139
14
1140
14
  for (auto *I : CatDecl->instance_properties())
1141
4
    RewriteProperty(I);
1142
14
1143
14
  for (auto *I : CatDecl->instance_methods())
1144
8
    RewriteMethodDeclaration(I);
1145
14
  for (auto *I : CatDecl->class_methods())
1146
0
    RewriteMethodDeclaration(I);
1147
14
1148
14
  // Lastly, comment out the @end.
1149
14
  ReplaceText(CatDecl->getAtEndRange().getBegin(),
1150
14
              strlen("@end"), "/* @end */\n");
1151
14
}
1152
1153
16
void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1154
16
  SourceLocation LocStart = PDecl->getBeginLoc();
1155
16
  assert(PDecl->isThisDeclarationADefinition());
1156
16
1157
16
  // FIXME: handle protocol headers that are declared across multiple lines.
1158
16
  ReplaceText(LocStart, 0, "// ");
1159
16
1160
16
  for (auto *I : PDecl->instance_methods())
1161
11
    RewriteMethodDeclaration(I);
1162
16
  for (auto *I : PDecl->class_methods())
1163
3
    RewriteMethodDeclaration(I);
1164
16
  for (auto *I : PDecl->instance_properties())
1165
2
    RewriteProperty(I);
1166
16
1167
16
  // Lastly, comment out the @end.
1168
16
  SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1169
16
  ReplaceText(LocEnd, strlen("@end"), "/* @end */\n");
1170
16
1171
16
  // Must comment out @optional/@required
1172
16
  const char *startBuf = SM->getCharacterData(LocStart);
1173
16
  const char *endBuf = SM->getCharacterData(LocEnd);
1174
933
  for (const char *p = startBuf; p < endBuf; 
p++917
) {
1175
917
    if (*p == '@' && 
!strncmp(p+1, "optional", strlen("optional"))23
) {
1176
4
      SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1177
4
      ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1178
4
1179
4
    }
1180
913
    else if (*p == '@' && 
!strncmp(p+1, "required", strlen("required"))19
) {
1181
1
      SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1182
1
      ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1183
1
1184
1
    }
1185
917
  }
1186
16
}
1187
1188
2
void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1189
2
  SourceLocation LocStart = (*D.begin())->getBeginLoc();
1190
2
  if (LocStart.isInvalid())
1191
2
    
llvm_unreachable0
("Invalid SourceLocation");
1192
2
  // FIXME: handle forward protocol that are declared across multiple lines.
1193
2
  ReplaceText(LocStart, 0, "// ");
1194
2
}
1195
1196
void
1197
0
RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1198
0
  SourceLocation LocStart = DG[0]->getBeginLoc();
1199
0
  if (LocStart.isInvalid())
1200
0
    llvm_unreachable("Invalid SourceLocation");
1201
0
  // FIXME: handle forward protocol that are declared across multiple lines.
1202
0
  ReplaceText(LocStart, 0, "// ");
1203
0
}
1204
1205
void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1206
122
                                        const FunctionType *&FPRetType) {
1207
122
  if (T->isObjCQualifiedIdType())
1208
0
    ResultStr += "id";
1209
122
  else if (T->isFunctionPointerType() ||
1210
122
           T->isBlockPointerType()) {
1211
4
    // needs special handling, since pointer-to-functions have special
1212
4
    // syntax (where a decaration models use).
1213
4
    QualType retType = T;
1214
4
    QualType PointeeTy;
1215
4
    if (const PointerType* PT = retType->getAs<PointerType>())
1216
0
      PointeeTy = PT->getPointeeType();
1217
4
    else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1218
4
      PointeeTy = BPT->getPointeeType();
1219
4
    if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1220
4
      ResultStr +=
1221
4
          FPRetType->getReturnType().getAsString(Context->getPrintingPolicy());
1222
4
      ResultStr += "(*";
1223
4
    }
1224
4
  } else
1225
118
    ResultStr += T.getAsString(Context->getPrintingPolicy());
1226
122
}
1227
1228
void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1229
                                        ObjCMethodDecl *OMD,
1230
113
                                        std::string &ResultStr) {
1231
113
  //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1232
113
  const FunctionType *FPRetType = nullptr;
1233
113
  ResultStr += "\nstatic ";
1234
113
  RewriteTypeIntoString(OMD->getReturnType(), ResultStr, FPRetType);
1235
113
  ResultStr += " ";
1236
113
1237
113
  // Unique method name
1238
113
  std::string NameStr;
1239
113
1240
113
  if (OMD->isInstanceMethod())
1241
104
    NameStr += "_I_";
1242
9
  else
1243
9
    NameStr += "_C_";
1244
113
1245
113
  NameStr += IDecl->getNameAsString();
1246
113
  NameStr += "_";
1247
113
1248
113
  if (ObjCCategoryImplDecl *CID =
1249
0
      dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1250
0
    NameStr += CID->getNameAsString();
1251
0
    NameStr += "_";
1252
0
  }
1253
113
  // Append selector names, replacing ':' with '_'
1254
113
  {
1255
113
    std::string selString = OMD->getSelector().getAsString();
1256
113
    int len = selString.size();
1257
1.00k
    for (int i = 0; i < len; 
i++894
)
1258
894
      if (selString[i] == ':')
1259
48
        selString[i] = '_';
1260
113
    NameStr += selString;
1261
113
  }
1262
113
  // Remember this name for metadata emission
1263
113
  MethodInternalNames[OMD] = NameStr;
1264
113
  ResultStr += NameStr;
1265
113
1266
113
  // Rewrite arguments
1267
113
  ResultStr += "(";
1268
113
1269
113
  // invisible arguments
1270
113
  if (OMD->isInstanceMethod()) {
1271
104
    QualType selfTy = Context->getObjCInterfaceType(IDecl);
1272
104
    selfTy = Context->getPointerType(selfTy);
1273
104
    if (!LangOpts.MicrosoftExt) {
1274
0
      if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1275
0
        ResultStr += "struct ";
1276
0
    }
1277
104
    // When rewriting for Microsoft, explicitly omit the structure name.
1278
104
    ResultStr += IDecl->getNameAsString();
1279
104
    ResultStr += " *";
1280
104
  }
1281
9
  else
1282
9
    ResultStr += Context->getObjCClassType().getAsString(
1283
9
      Context->getPrintingPolicy());
1284
113
1285
113
  ResultStr += " self, ";
1286
113
  ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1287
113
  ResultStr += " _cmd";
1288
113
1289
113
  // Method arguments.
1290
113
  for (const auto *PDecl : OMD->parameters()) {
1291
48
    ResultStr += ", ";
1292
48
    if (PDecl->getType()->isObjCQualifiedIdType()) {
1293
0
      ResultStr += "id ";
1294
0
      ResultStr += PDecl->getNameAsString();
1295
48
    } else {
1296
48
      std::string Name = PDecl->getNameAsString();
1297
48
      QualType QT = PDecl->getType();
1298
48
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
1299
48
      (void)convertBlockPointerToFunctionPointer(QT);
1300
48
      QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1301
48
      ResultStr += Name;
1302
48
    }
1303
48
  }
1304
113
  if (OMD->isVariadic())
1305
0
    ResultStr += ", ...";
1306
113
  ResultStr += ") ";
1307
113
1308
113
  if (FPRetType) {
1309
3
    ResultStr += ")"; // close the precedence "scope" for "*".
1310
3
1311
3
    // Now, emit the argument types (if any).
1312
3
    if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1313
3
      ResultStr += "(";
1314
3
      for (unsigned i = 0, e = FT->getNumParams(); i != e; 
++i0
) {
1315
0
        if (i) ResultStr += ", ";
1316
0
        std::string ParamStr =
1317
0
            FT->getParamType(i).getAsString(Context->getPrintingPolicy());
1318
0
        ResultStr += ParamStr;
1319
0
      }
1320
3
      if (FT->isVariadic()) {
1321
0
        if (FT->getNumParams())
1322
0
          ResultStr += ", ";
1323
0
        ResultStr += "...";
1324
0
      }
1325
3
      ResultStr += ")";
1326
3
    } else {
1327
0
      ResultStr += "()";
1328
0
    }
1329
3
  }
1330
113
}
1331
1332
93
void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1333
93
  ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1334
93
  ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1335
93
1336
93
  if (IMD) {
1337
88
    if (IMD->getIvarRBraceLoc().isValid()) {
1338
3
      ReplaceText(IMD->getBeginLoc(), 1, "/** ");
1339
3
      ReplaceText(IMD->getIvarRBraceLoc(), 1, "**/ ");
1340
3
    }
1341
85
    else {
1342
85
      InsertText(IMD->getBeginLoc(), "// ");
1343
85
    }
1344
88
  }
1345
5
  else
1346
5
    InsertText(CID->getBeginLoc(), "// ");
1347
93
1348
93
  for (auto *OMD : IMD ? 
IMD->instance_methods()88
:
CID->instance_methods()5
) {
1349
56
    std::string ResultStr;
1350
56
    RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1351
56
    SourceLocation LocStart = OMD->getBeginLoc();
1352
56
    SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1353
56
1354
56
    const char *startBuf = SM->getCharacterData(LocStart);
1355
56
    const char *endBuf = SM->getCharacterData(LocEnd);
1356
56
    ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1357
56
  }
1358
93
1359
93
  for (auto *OMD : IMD ? 
IMD->class_methods()88
:
CID->class_methods()5
) {
1360
9
    std::string ResultStr;
1361
9
    RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1362
9
    SourceLocation LocStart = OMD->getBeginLoc();
1363
9
    SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1364
9
1365
9
    const char *startBuf = SM->getCharacterData(LocStart);
1366
9
    const char *endBuf = SM->getCharacterData(LocEnd);
1367
9
    ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1368
9
  }
1369
93
  for (auto *I : IMD ? 
IMD->property_impls()88
:
CID->property_impls()5
)
1370
31
    RewritePropertyImplDecl(I, IMD, CID);
1371
93
1372
93
  InsertText(IMD ? 
IMD->getEndLoc()88
:
CID->getEndLoc()5
, "// ");
1373
93
}
1374
1375
183
void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1376
183
  // Do not synthesize more than once.
1377
183
  if (ObjCSynthesizedStructs.count(ClassDecl))
1378
9
    return;
1379
174
  // Make sure super class's are written before current class is written.
1380
174
  ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1381
205
  while (SuperClass) {
1382
31
    RewriteInterfaceDecl(SuperClass);
1383
31
    SuperClass = SuperClass->getSuperClass();
1384
31
  }
1385
174
  std::string ResultStr;
1386
174
  if (!ObjCWrittenInterfaces.count(ClassDecl->getCanonicalDecl())) {
1387
152
    // we haven't seen a forward decl - generate a typedef.
1388
152
    RewriteOneForwardClassDecl(ClassDecl, ResultStr);
1389
152
    RewriteIvarOffsetSymbols(ClassDecl, ResultStr);
1390
152
1391
152
    RewriteObjCInternalStruct(ClassDecl, ResultStr);
1392
152
    // Mark this typedef as having been written into its c++ equivalent.
1393
152
    ObjCWrittenInterfaces.insert(ClassDecl->getCanonicalDecl());
1394
152
1395
152
    for (auto *I : ClassDecl->instance_properties())
1396
31
      RewriteProperty(I);
1397
152
    for (auto *I : ClassDecl->instance_methods())
1398
108
      RewriteMethodDeclaration(I);
1399
152
    for (auto *I : ClassDecl->class_methods())
1400
80
      RewriteMethodDeclaration(I);
1401
152
1402
152
    // Lastly, comment out the @end.
1403
152
    ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1404
152
                "/* @end */\n");
1405
152
  }
1406
174
}
1407
1408
13
Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1409
13
  SourceRange OldRange = PseudoOp->getSourceRange();
1410
13
1411
13
  // We just magically know some things about the structure of this
1412
13
  // expression.
1413
13
  ObjCMessageExpr *OldMsg =
1414
13
    cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1415
13
                            PseudoOp->getNumSemanticExprs() - 1));
1416
13
1417
13
  // Because the rewriter doesn't allow us to rewrite rewritten code,
1418
13
  // we need to suppress rewriting the sub-statements.
1419
13
  Expr *Base;
1420
13
  SmallVector<Expr*, 2> Args;
1421
13
  {
1422
13
    DisableReplaceStmtScope S(*this);
1423
13
1424
13
    // Rebuild the base expression if we have one.
1425
13
    Base = nullptr;
1426
13
    if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1427
13
      Base = OldMsg->getInstanceReceiver();
1428
13
      Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1429
13
      Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1430
13
    }
1431
13
1432
13
    unsigned numArgs = OldMsg->getNumArgs();
1433
29
    for (unsigned i = 0; i < numArgs; 
i++16
) {
1434
16
      Expr *Arg = OldMsg->getArg(i);
1435
16
      if (isa<OpaqueValueExpr>(Arg))
1436
13
        Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1437
16
      Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1438
16
      Args.push_back(Arg);
1439
16
    }
1440
13
  }
1441
13
1442
13
  // TODO: avoid this copy.
1443
13
  SmallVector<SourceLocation, 1> SelLocs;
1444
13
  OldMsg->getSelectorLocs(SelLocs);
1445
13
1446
13
  ObjCMessageExpr *NewMsg = nullptr;
1447
13
  switch (OldMsg->getReceiverKind()) {
1448
13
  case ObjCMessageExpr::Class:
1449
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1450
0
                                     OldMsg->getValueKind(),
1451
0
                                     OldMsg->getLeftLoc(),
1452
0
                                     OldMsg->getClassReceiverTypeInfo(),
1453
0
                                     OldMsg->getSelector(),
1454
0
                                     SelLocs,
1455
0
                                     OldMsg->getMethodDecl(),
1456
0
                                     Args,
1457
0
                                     OldMsg->getRightLoc(),
1458
0
                                     OldMsg->isImplicit());
1459
0
    break;
1460
13
1461
13
  case ObjCMessageExpr::Instance:
1462
13
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1463
13
                                     OldMsg->getValueKind(),
1464
13
                                     OldMsg->getLeftLoc(),
1465
13
                                     Base,
1466
13
                                     OldMsg->getSelector(),
1467
13
                                     SelLocs,
1468
13
                                     OldMsg->getMethodDecl(),
1469
13
                                     Args,
1470
13
                                     OldMsg->getRightLoc(),
1471
13
                                     OldMsg->isImplicit());
1472
13
    break;
1473
13
1474
13
  case ObjCMessageExpr::SuperClass:
1475
0
  case ObjCMessageExpr::SuperInstance:
1476
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1477
0
                                     OldMsg->getValueKind(),
1478
0
                                     OldMsg->getLeftLoc(),
1479
0
                                     OldMsg->getSuperLoc(),
1480
0
                 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1481
0
                                     OldMsg->getSuperType(),
1482
0
                                     OldMsg->getSelector(),
1483
0
                                     SelLocs,
1484
0
                                     OldMsg->getMethodDecl(),
1485
0
                                     Args,
1486
0
                                     OldMsg->getRightLoc(),
1487
0
                                     OldMsg->isImplicit());
1488
0
    break;
1489
13
  }
1490
13
1491
13
  Stmt *Replacement = SynthMessageExpr(NewMsg);
1492
13
  ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1493
13
  return Replacement;
1494
13
}
1495
1496
20
Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1497
20
  SourceRange OldRange = PseudoOp->getSourceRange();
1498
20
1499
20
  // We just magically know some things about the structure of this
1500
20
  // expression.
1501
20
  ObjCMessageExpr *OldMsg =
1502
20
    cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1503
20
1504
20
  // Because the rewriter doesn't allow us to rewrite rewritten code,
1505
20
  // we need to suppress rewriting the sub-statements.
1506
20
  Expr *Base = nullptr;
1507
20
  SmallVector<Expr*, 1> Args;
1508
20
  {
1509
20
    DisableReplaceStmtScope S(*this);
1510
20
    // Rebuild the base expression if we have one.
1511
20
    if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1512
20
      Base = OldMsg->getInstanceReceiver();
1513
20
      Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1514
20
      Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1515
20
    }
1516
20
    unsigned numArgs = OldMsg->getNumArgs();
1517
23
    for (unsigned i = 0; i < numArgs; 
i++3
) {
1518
3
      Expr *Arg = OldMsg->getArg(i);
1519
3
      if (isa<OpaqueValueExpr>(Arg))
1520
0
        Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1521
3
      Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1522
3
      Args.push_back(Arg);
1523
3
    }
1524
20
  }
1525
20
1526
20
  // Intentionally empty.
1527
20
  SmallVector<SourceLocation, 1> SelLocs;
1528
20
1529
20
  ObjCMessageExpr *NewMsg = nullptr;
1530
20
  switch (OldMsg->getReceiverKind()) {
1531
20
  case ObjCMessageExpr::Class:
1532
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1533
0
                                     OldMsg->getValueKind(),
1534
0
                                     OldMsg->getLeftLoc(),
1535
0
                                     OldMsg->getClassReceiverTypeInfo(),
1536
0
                                     OldMsg->getSelector(),
1537
0
                                     SelLocs,
1538
0
                                     OldMsg->getMethodDecl(),
1539
0
                                     Args,
1540
0
                                     OldMsg->getRightLoc(),
1541
0
                                     OldMsg->isImplicit());
1542
0
    break;
1543
20
1544
20
  case ObjCMessageExpr::Instance:
1545
20
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1546
20
                                     OldMsg->getValueKind(),
1547
20
                                     OldMsg->getLeftLoc(),
1548
20
                                     Base,
1549
20
                                     OldMsg->getSelector(),
1550
20
                                     SelLocs,
1551
20
                                     OldMsg->getMethodDecl(),
1552
20
                                     Args,
1553
20
                                     OldMsg->getRightLoc(),
1554
20
                                     OldMsg->isImplicit());
1555
20
    break;
1556
20
1557
20
  case ObjCMessageExpr::SuperClass:
1558
0
  case ObjCMessageExpr::SuperInstance:
1559
0
    NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1560
0
                                     OldMsg->getValueKind(),
1561
0
                                     OldMsg->getLeftLoc(),
1562
0
                                     OldMsg->getSuperLoc(),
1563
0
                 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1564
0
                                     OldMsg->getSuperType(),
1565
0
                                     OldMsg->getSelector(),
1566
0
                                     SelLocs,
1567
0
                                     OldMsg->getMethodDecl(),
1568
0
                                     Args,
1569
0
                                     OldMsg->getRightLoc(),
1570
0
                                     OldMsg->isImplicit());
1571
0
    break;
1572
20
  }
1573
20
1574
20
  Stmt *Replacement = SynthMessageExpr(NewMsg);
1575
20
  ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1576
20
  return Replacement;
1577
20
}
1578
1579
/// SynthCountByEnumWithState - To print:
1580
/// ((NSUInteger (*)
1581
///  (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1582
///  (void *)objc_msgSend)((id)l_collection,
1583
///                        sel_registerName(
1584
///                          "countByEnumeratingWithState:objects:count:"),
1585
///                        &enumState,
1586
///                        (id *)__rw_items, (NSUInteger)16)
1587
///
1588
10
void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1589
10
  buf += "((_WIN_NSUInteger (*) (id, SEL, struct __objcFastEnumerationState *, "
1590
10
  "id *, _WIN_NSUInteger))(void *)objc_msgSend)";
1591
10
  buf += "\n\t\t";
1592
10
  buf += "((id)l_collection,\n\t\t";
1593
10
  buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1594
10
  buf += "\n\t\t";
1595
10
  buf += "&enumState, "
1596
10
         "(id *)__rw_items, (_WIN_NSUInteger)16)";
1597
10
}
1598
1599
/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1600
/// statement to exit to its outer synthesized loop.
1601
///
1602
5
Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1603
5
  if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1604
5
    return S;
1605
0
  // replace break with goto __break_label
1606
0
  std::string buf;
1607
0
1608
0
  SourceLocation startLoc = S->getBeginLoc();
1609
0
  buf = "goto __break_label_";
1610
0
  buf += utostr(ObjCBcLabelNo.back());
1611
0
  ReplaceText(startLoc, strlen("break"), buf);
1612
0
1613
0
  return nullptr;
1614
0
}
1615
1616
void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1617
                                          SourceLocation Loc,
1618
117
                                          std::string &LineString) {
1619
117
  if (Loc.isFileID() && GenerateLineInfo) {
1620
1
    LineString += "\n#line ";
1621
1
    PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1622
1
    LineString += utostr(PLoc.getLine());
1623
1
    LineString += " \"";
1624
1
    LineString += Lexer::Stringify(PLoc.getFilename());
1625
1
    LineString += "\"\n";
1626
1
  }
1627
117
}
1628
1629
/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1630
/// statement to continue with its inner synthesized loop.
1631
///
1632
0
Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1633
0
  if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1634
0
    return S;
1635
0
  // replace continue with goto __continue_label
1636
0
  std::string buf;
1637
0
1638
0
  SourceLocation startLoc = S->getBeginLoc();
1639
0
  buf = "goto __continue_label_";
1640
0
  buf += utostr(ObjCBcLabelNo.back());
1641
0
  ReplaceText(startLoc, strlen("continue"), buf);
1642
0
1643
0
  return nullptr;
1644
0
}
1645
1646
/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1647
///  It rewrites:
1648
/// for ( type elem in collection) { stmts; }
1649
1650
/// Into:
1651
/// {
1652
///   type elem;
1653
///   struct __objcFastEnumerationState enumState = { 0 };
1654
///   id __rw_items[16];
1655
///   id l_collection = (id)collection;
1656
///   NSUInteger limit = [l_collection countByEnumeratingWithState:&enumState
1657
///                                       objects:__rw_items count:16];
1658
/// if (limit) {
1659
///   unsigned long startMutations = *enumState.mutationsPtr;
1660
///   do {
1661
///        unsigned long counter = 0;
1662
///        do {
1663
///             if (startMutations != *enumState.mutationsPtr)
1664
///               objc_enumerationMutation(l_collection);
1665
///             elem = (type)enumState.itemsPtr[counter++];
1666
///             stmts;
1667
///             __continue_label: ;
1668
///        } while (counter < limit);
1669
///   } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1670
///                                  objects:__rw_items count:16]));
1671
///   elem = nil;
1672
///   __break_label: ;
1673
///  }
1674
///  else
1675
///       elem = nil;
1676
///  }
1677
///
1678
Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1679
5
                                                SourceLocation OrigEnd) {
1680
5
  assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1681
5
  assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1682
5
         "ObjCForCollectionStmt Statement stack mismatch");
1683
5
  assert(!ObjCBcLabelNo.empty() &&
1684
5
         "ObjCForCollectionStmt - Label No stack empty");
1685
5
1686
5
  SourceLocation startLoc = S->getBeginLoc();
1687
5
  const char *startBuf = SM->getCharacterData(startLoc);
1688
5
  StringRef elementName;
1689
5
  std::string elementTypeAsString;
1690
5
  std::string buf;
1691
5
  // line directive first.
1692
5
  SourceLocation ForEachLoc = S->getForLoc();
1693
5
  ConvertSourceLocationToLineDirective(ForEachLoc, buf);
1694
5
  buf += "{\n\t";
1695
5
  if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1696
5
    // type elem;
1697
5
    NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1698
5
    QualType ElementType = cast<ValueDecl>(D)->getType();
1699
5
    if (ElementType->isObjCQualifiedIdType() ||
1700
5
        ElementType->isObjCQualifiedInterfaceType())
1701
0
      // Simply use 'id' for all qualified types.
1702
0
      elementTypeAsString = "id";
1703
5
    else
1704
5
      elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1705
5
    buf += elementTypeAsString;
1706
5
    buf += " ";
1707
5
    elementName = D->getName();
1708
5
    buf += elementName;
1709
5
    buf += ";\n\t";
1710
5
  }
1711
0
  else {
1712
0
    DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1713
0
    elementName = DR->getDecl()->getName();
1714
0
    ValueDecl *VD = DR->getDecl();
1715
0
    if (VD->getType()->isObjCQualifiedIdType() ||
1716
0
        VD->getType()->isObjCQualifiedInterfaceType())
1717
0
      // Simply use 'id' for all qualified types.
1718
0
      elementTypeAsString = "id";
1719
0
    else
1720
0
      elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1721
0
  }
1722
5
1723
5
  // struct __objcFastEnumerationState enumState = { 0 };
1724
5
  buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1725
5
  // id __rw_items[16];
1726
5
  buf += "id __rw_items[16];\n\t";
1727
5
  // id l_collection = (id)
1728
5
  buf += "id l_collection = (id)";
1729
5
  // Find start location of 'collection' the hard way!
1730
5
  const char *startCollectionBuf = startBuf;
1731
5
  startCollectionBuf += 3;  // skip 'for'
1732
5
  startCollectionBuf = strchr(startCollectionBuf, '(');
1733
5
  startCollectionBuf++; // skip '('
1734
5
  // find 'in' and skip it.
1735
33
  while (*startCollectionBuf != ' ' ||
1736
33
         
*(startCollectionBuf+1) != 'i'10
||
*(startCollectionBuf+2) != 'n'5
||
1737
33
         
(5
*(startCollectionBuf+3) != ' '5
&&
1738
5
          
*(startCollectionBuf+3) != '['0
&&
*(startCollectionBuf+3) != '('0
))
1739
28
    startCollectionBuf++;
1740
5
  startCollectionBuf += 3;
1741
5
1742
5
  // Replace: "for (type element in" with string constructed thus far.
1743
5
  ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1744
5
  // Replace ')' in for '(' type elem in collection ')' with ';'
1745
5
  SourceLocation rightParenLoc = S->getRParenLoc();
1746
5
  const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1747
5
  SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1748
5
  buf = ";\n\t";
1749
5
1750
5
  // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1751
5
  //                                   objects:__rw_items count:16];
1752
5
  // which is synthesized into:
1753
5
  // NSUInteger limit =
1754
5
  // ((NSUInteger (*)
1755
5
  //  (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1756
5
  //  (void *)objc_msgSend)((id)l_collection,
1757
5
  //                        sel_registerName(
1758
5
  //                          "countByEnumeratingWithState:objects:count:"),
1759
5
  //                        (struct __objcFastEnumerationState *)&state,
1760
5
  //                        (id *)__rw_items, (NSUInteger)16);
1761
5
  buf += "_WIN_NSUInteger limit =\n\t\t";
1762
5
  SynthCountByEnumWithState(buf);
1763
5
  buf += ";\n\t";
1764
5
  /// if (limit) {
1765
5
  ///   unsigned long startMutations = *enumState.mutationsPtr;
1766
5
  ///   do {
1767
5
  ///        unsigned long counter = 0;
1768
5
  ///        do {
1769
5
  ///             if (startMutations != *enumState.mutationsPtr)
1770
5
  ///               objc_enumerationMutation(l_collection);
1771
5
  ///             elem = (type)enumState.itemsPtr[counter++];
1772
5
  buf += "if (limit) {\n\t";
1773
5
  buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1774
5
  buf += "do {\n\t\t";
1775
5
  buf += "unsigned long counter = 0;\n\t\t";
1776
5
  buf += "do {\n\t\t\t";
1777
5
  buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1778
5
  buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1779
5
  buf += elementName;
1780
5
  buf += " = (";
1781
5
  buf += elementTypeAsString;
1782
5
  buf += ")enumState.itemsPtr[counter++];";
1783
5
  // Replace ')' in for '(' type elem in collection ')' with all of these.
1784
5
  ReplaceText(lparenLoc, 1, buf);
1785
5
1786
5
  ///            __continue_label: ;
1787
5
  ///        } while (counter < limit);
1788
5
  ///   } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1789
5
  ///                                  objects:__rw_items count:16]));
1790
5
  ///   elem = nil;
1791
5
  ///   __break_label: ;
1792
5
  ///  }
1793
5
  ///  else
1794
5
  ///       elem = nil;
1795
5
  ///  }
1796
5
  ///
1797
5
  buf = ";\n\t";
1798
5
  buf += "__continue_label_";
1799
5
  buf += utostr(ObjCBcLabelNo.back());
1800
5
  buf += ": ;";
1801
5
  buf += "\n\t\t";
1802
5
  buf += "} while (counter < limit);\n\t";
1803
5
  buf += "} while ((limit = ";
1804
5
  SynthCountByEnumWithState(buf);
1805
5
  buf += "));\n\t";
1806
5
  buf += elementName;
1807
5
  buf += " = ((";
1808
5
  buf += elementTypeAsString;
1809
5
  buf += ")0);\n\t";
1810
5
  buf += "__break_label_";
1811
5
  buf += utostr(ObjCBcLabelNo.back());
1812
5
  buf += ": ;\n\t";
1813
5
  buf += "}\n\t";
1814
5
  buf += "else\n\t\t";
1815
5
  buf += elementName;
1816
5
  buf += " = ((";
1817
5
  buf += elementTypeAsString;
1818
5
  buf += ")0);\n\t";
1819
5
  buf += "}\n";
1820
5
1821
5
  // Insert all these *after* the statement body.
1822
5
  // FIXME: If this should support Obj-C++, support CXXTryStmt
1823
5
  if (isa<CompoundStmt>(S->getBody())) {
1824
5
    SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1825
5
    InsertText(endBodyLoc, buf);
1826
5
  } else {
1827
0
    /* Need to treat single statements specially. For example:
1828
0
     *
1829
0
     *     for (A *a in b) if (stuff()) break;
1830
0
     *     for (A *a in b) xxxyy;
1831
0
     *
1832
0
     * The following code simply scans ahead to the semi to find the actual end.
1833
0
     */
1834
0
    const char *stmtBuf = SM->getCharacterData(OrigEnd);
1835
0
    const char *semiBuf = strchr(stmtBuf, ';');
1836
0
    assert(semiBuf && "Can't find ';'");
1837
0
    SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1838
0
    InsertText(endBodyLoc, buf);
1839
0
  }
1840
5
  Stmts.pop_back();
1841
5
  ObjCBcLabelNo.pop_back();
1842
5
  return nullptr;
1843
5
}
1844
1845
12
static void Write_RethrowObject(std::string &buf) {
1846
12
  buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1847
12
  buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1848
12
  buf += "\tid rethrow;\n";
1849
12
  buf += "\t} _fin_force_rethow(_rethrow);";
1850
12
}
1851
1852
/// RewriteObjCSynchronizedStmt -
1853
/// This routine rewrites @synchronized(expr) stmt;
1854
/// into:
1855
/// objc_sync_enter(expr);
1856
/// @try stmt @finally { objc_sync_exit(expr); }
1857
///
1858
4
Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1859
4
  // Get the start location and compute the semi location.
1860
4
  SourceLocation startLoc = S->getBeginLoc();
1861
4
  const char *startBuf = SM->getCharacterData(startLoc);
1862
4
1863
4
  assert((*startBuf == '@') && "bogus @synchronized location");
1864
4
1865
4
  std::string buf;
1866
4
  SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1867
4
  ConvertSourceLocationToLineDirective(SynchLoc, buf);
1868
4
  buf += "{ id _rethrow = 0; id _sync_obj = (id)";
1869
4
1870
4
  const char *lparenBuf = startBuf;
1871
59
  while (*lparenBuf != '(') 
lparenBuf++55
;
1872
4
  ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1873
4
1874
4
  buf = "; objc_sync_enter(_sync_obj);\n";
1875
4
  buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1876
4
  buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1877
4
  buf += "\n\tid sync_exit;";
1878
4
  buf += "\n\t} _sync_exit(_sync_obj);\n";
1879
4
1880
4
  // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1881
4
  // the sync expression is typically a message expression that's already
1882
4
  // been rewritten! (which implies the SourceLocation's are invalid).
1883
4
  SourceLocation RParenExprLoc = S->getSynchBody()->getBeginLoc();
1884
4
  const char *RParenExprLocBuf = SM->getCharacterData(RParenExprLoc);
1885
12
  while (*RParenExprLocBuf != ')') 
RParenExprLocBuf--8
;
1886
4
  RParenExprLoc = startLoc.getLocWithOffset(RParenExprLocBuf-startBuf);
1887
4
1888
4
  SourceLocation LBranceLoc = S->getSynchBody()->getBeginLoc();
1889
4
  const char *LBraceLocBuf = SM->getCharacterData(LBranceLoc);
1890
4
  assert (*LBraceLocBuf == '{');
1891
4
  ReplaceText(RParenExprLoc, (LBraceLocBuf - SM->getCharacterData(RParenExprLoc) + 1), buf);
1892
4
1893
4
  SourceLocation startRBraceLoc = S->getSynchBody()->getEndLoc();
1894
4
  assert((*SM->getCharacterData(startRBraceLoc) == '}') &&
1895
4
         "bogus @synchronized block");
1896
4
1897
4
  buf = "} catch (id e) {_rethrow = e;}\n";
1898
4
  Write_RethrowObject(buf);
1899
4
  buf += "}\n";
1900
4
  buf += "}\n";
1901
4
1902
4
  ReplaceText(startRBraceLoc, 1, buf);
1903
4
1904
4
  return nullptr;
1905
4
}
1906
1907
void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1908
33
{
1909
33
  // Perform a bottom up traversal of all children.
1910
33
  for (Stmt *SubStmt : S->children())
1911
25
    if (SubStmt)
1912
25
      WarnAboutReturnGotoStmts(SubStmt);
1913
33
1914
33
  if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1915
0
    Diags.Report(Context->getFullLoc(S->getBeginLoc()),
1916
0
                 TryFinallyContainsReturnDiag);
1917
0
  }
1918
33
}
1919
1920
1
Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt  *S) {
1921
1
  SourceLocation startLoc = S->getAtLoc();
1922
1
  ReplaceText(startLoc, strlen("@autoreleasepool"), "/* @autoreleasepool */");
1923
1
  ReplaceText(S->getSubStmt()->getBeginLoc(), 1,
1924
1
              "{ __AtAutoreleasePool __autoreleasepool; ");
1925
1
1926
1
  return nullptr;
1927
1
}
1928
1929
14
Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1930
14
  ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1931
14
  bool noCatch = S->getNumCatchStmts() == 0;
1932
14
  std::string buf;
1933
14
  SourceLocation TryLocation = S->getAtTryLoc();
1934
14
  ConvertSourceLocationToLineDirective(TryLocation, buf);
1935
14
1936
14
  if (finalStmt) {
1937
8
    if (noCatch)
1938
7
      buf += "{ id volatile _rethrow = 0;\n";
1939
1
    else {
1940
1
      buf += "{ id volatile _rethrow = 0;\ntry {\n";
1941
1
    }
1942
8
  }
1943
14
  // Get the start location and compute the semi location.
1944
14
  SourceLocation startLoc = S->getBeginLoc();
1945
14
  const char *startBuf = SM->getCharacterData(startLoc);
1946
14
1947
14
  assert((*startBuf == '@') && "bogus @try location");
1948
14
  if (finalStmt)
1949
8
    ReplaceText(startLoc, 1, buf);
1950
6
  else
1951
6
    // @try -> try
1952
6
    ReplaceText(startLoc, 1, "");
1953
14
1954
25
  for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; 
++I11
) {
1955
11
    ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1956
11
    VarDecl *catchDecl = Catch->getCatchParamDecl();
1957
11
1958
11
    startLoc = Catch->getBeginLoc();
1959
11
    bool AtRemoved = false;
1960
11
    if (catchDecl) {
1961
8
      QualType t = catchDecl->getType();
1962
8
      if (const ObjCObjectPointerType *Ptr = t->getAs<ObjCObjectPointerType>()) {
1963
8
        // Should be a pointer to a class.
1964
8
        ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1965
8
        if (IDecl) {
1966
6
          std::string Result;
1967
6
          ConvertSourceLocationToLineDirective(Catch->getBeginLoc(), Result);
1968
6
1969
6
          startBuf = SM->getCharacterData(startLoc);
1970
6
          assert((*startBuf == '@') && "bogus @catch location");
1971
6
          SourceLocation rParenLoc = Catch->getRParenLoc();
1972
6
          const char *rParenBuf = SM->getCharacterData(rParenLoc);
1973
6
1974
6
          // _objc_exc_Foo *_e as argument to catch.
1975
6
          Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
1976
6
          Result += " *_"; Result += catchDecl->getNameAsString();
1977
6
          Result += ")";
1978
6
          ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
1979
6
          // Foo *e = (Foo *)_e;
1980
6
          Result.clear();
1981
6
          Result = "{ ";
1982
6
          Result += IDecl->getNameAsString();
1983
6
          Result += " *"; Result += catchDecl->getNameAsString();
1984
6
          Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
1985
6
          Result += "_"; Result += catchDecl->getNameAsString();
1986
6
1987
6
          Result += "; ";
1988
6
          SourceLocation lBraceLoc = Catch->getCatchBody()->getBeginLoc();
1989
6
          ReplaceText(lBraceLoc, 1, Result);
1990
6
          AtRemoved = true;
1991
6
        }
1992
8
      }
1993
8
    }
1994
11
    if (!AtRemoved)
1995
5
      // @catch -> catch
1996
5
      ReplaceText(startLoc, 1, "");
1997
11
1998
11
  }
1999
14
  if (finalStmt) {
2000
8
    buf.clear();
2001
8
    SourceLocation FinallyLoc = finalStmt->getBeginLoc();
2002
8
2003
8
    if (noCatch) {
2004
7
      ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2005
7
      buf += "catch (id e) {_rethrow = e;}\n";
2006
7
    }
2007
1
    else {
2008
1
      buf += "}\n";
2009
1
      ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2010
1
      buf += "catch (id e) {_rethrow = e;}\n";
2011
1
    }
2012
8
2013
8
    SourceLocation startFinalLoc = finalStmt->getBeginLoc();
2014
8
    ReplaceText(startFinalLoc, 8, buf);
2015
8
    Stmt *body = finalStmt->getFinallyBody();
2016
8
    SourceLocation startFinalBodyLoc = body->getBeginLoc();
2017
8
    buf.clear();
2018
8
    Write_RethrowObject(buf);
2019
8
    ReplaceText(startFinalBodyLoc, 1, buf);
2020
8
2021
8
    SourceLocation endFinalBodyLoc = body->getEndLoc();
2022
8
    ReplaceText(endFinalBodyLoc, 1, "}\n}");
2023
8
    // Now check for any return/continue/go statements within the @try.
2024
8
    WarnAboutReturnGotoStmts(S->getTryBody());
2025
8
  }
2026
14
2027
14
  return nullptr;
2028
14
}
2029
2030
// This can't be done with ReplaceStmt(S, ThrowExpr), since
2031
// the throw expression is typically a message expression that's already
2032
// been rewritten! (which implies the SourceLocation's are invalid).
2033
5
Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2034
5
  // Get the start location and compute the semi location.
2035
5
  SourceLocation startLoc = S->getBeginLoc();
2036
5
  const char *startBuf = SM->getCharacterData(startLoc);
2037
5
2038
5
  assert((*startBuf == '@') && "bogus @throw location");
2039
5
2040
5
  std::string buf;
2041
5
  /* void objc_exception_throw(id) __attribute__((noreturn)); */
2042
5
  if (S->getThrowExpr())
2043
4
    buf = "objc_exception_throw(";
2044
1
  else
2045
1
    buf = "throw";
2046
5
2047
5
  // handle "@  throw" correctly.
2048
5
  const char *wBuf = strchr(startBuf, 'w');
2049
5
  assert((*wBuf == 'w') && "@throw: can't find 'w'");
2050
5
  ReplaceText(startLoc, wBuf-startBuf+1, buf);
2051
5
2052
5
  SourceLocation endLoc = S->getEndLoc();
2053
5
  const char *endBuf = SM->getCharacterData(endLoc);
2054
5
  const char *semiBuf = strchr(endBuf, ';');
2055
5
  assert((*semiBuf == ';') && "@throw: can't find ';'");
2056
5
  SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
2057
5
  if (S->getThrowExpr())
2058
4
    ReplaceText(semiLoc, 1, ");");
2059
5
  return nullptr;
2060
5
}
2061
2062
3
Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2063
3
  // Create a new string expression.
2064
3
  std::string StrEncoding;
2065
3
  Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
2066
3
  Expr *Replacement = getStringLiteral(StrEncoding);
2067
3
  ReplaceStmt(Exp, Replacement);
2068
3
2069
3
  // Replace this subexpr in the parent.
2070
3
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2071
3
  return Replacement;
2072
3
}
2073
2074
0
Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2075
0
  if (!SelGetUidFunctionDecl)
2076
0
    SynthSelGetUidFunctionDecl();
2077
0
  assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
2078
0
  // Create a call to sel_registerName("selName").
2079
0
  SmallVector<Expr*, 8> SelExprs;
2080
0
  SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2081
0
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2082
0
                                                  SelExprs);
2083
0
  ReplaceStmt(Exp, SelExp);
2084
0
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2085
0
  return SelExp;
2086
0
}
2087
2088
CallExpr *
2089
RewriteModernObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2090
                                                ArrayRef<Expr *> Args,
2091
                                                SourceLocation StartLoc,
2092
215
                                                SourceLocation EndLoc) {
2093
215
  // Get the type, we will need to reference it in a couple spots.
2094
215
  QualType msgSendType = FD->getType();
2095
215
2096
215
  // Create a reference to the objc_msgSend() declaration.
2097
215
  DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2098
215
                                               VK_LValue, SourceLocation());
2099
215
2100
215
  // Now, we cast the reference to a pointer to the objc_msgSend type.
2101
215
  QualType pToFunc = Context->getPointerType(msgSendType);
2102
215
  ImplicitCastExpr *ICE =
2103
215
    ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2104
215
                             DRE, nullptr, VK_RValue);
2105
215
2106
215
  const FunctionType *FT = msgSendType->getAs<FunctionType>();
2107
215
2108
215
  CallExpr *Exp = CallExpr::Create(
2109
215
      *Context, ICE, Args, FT->getCallResultType(*Context), VK_RValue, EndLoc);
2110
215
  return Exp;
2111
215
}
2112
2113
static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2114
6
                                const char *&startRef, const char *&endRef) {
2115
70
  while (startBuf < endBuf) {
2116
70
    if (*startBuf == '<')
2117
6
      startRef = startBuf; // mark the start.
2118
70
    if (*startBuf == '>') {
2119
6
      if (startRef && *startRef == '<') {
2120
6
        endRef = startBuf; // mark the end.
2121
6
        return true;
2122
6
      }
2123
0
      return false;
2124
0
    }
2125
64
    startBuf++;
2126
64
  }
2127
6
  
return false0
;
2128
6
}
2129
2130
0
static void scanToNextArgument(const char *&argRef) {
2131
0
  int angle = 0;
2132
0
  while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2133
0
    if (*argRef == '<')
2134
0
      angle++;
2135
0
    else if (*argRef == '>')
2136
0
      angle--;
2137
0
    argRef++;
2138
0
  }
2139
0
  assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2140
0
}
2141
2142
545
bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2143
545
  if (T->isObjCQualifiedIdType())
2144
2
    return true;
2145
543
  if (const PointerType *PT = T->getAs<PointerType>()) {
2146
70
    if (PT->getPointeeType()->isObjCQualifiedIdType())
2147
0
      return true;
2148
543
  }
2149
543
  if (T->isObjCObjectPointerType()) {
2150
131
    T = T->getPointeeType();
2151
131
    return T->isObjCQualifiedInterfaceType();
2152
131
  }
2153
412
  if (T->isArrayType()) {
2154
0
    QualType ElemTy = Context->getBaseElementType(T);
2155
0
    return needToScanForQualifiers(ElemTy);
2156
0
  }
2157
412
  return false;
2158
412
}
2159
2160
30
void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2161
30
  QualType Type = E->getType();
2162
30
  if (needToScanForQualifiers(Type)) {
2163
1
    SourceLocation Loc, EndLoc;
2164
1
2165
1
    if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2166
1
      Loc = ECE->getLParenLoc();
2167
1
      EndLoc = ECE->getRParenLoc();
2168
1
    } else {
2169
0
      Loc = E->getBeginLoc();
2170
0
      EndLoc = E->getEndLoc();
2171
0
    }
2172
1
    // This will defend against trying to rewrite synthesized expressions.
2173
1
    if (Loc.isInvalid() || EndLoc.isInvalid())
2174
0
      return;
2175
1
2176
1
    const char *startBuf = SM->getCharacterData(Loc);
2177
1
    const char *endBuf = SM->getCharacterData(EndLoc);
2178
1
    const char *startRef = nullptr, *endRef = nullptr;
2179
1
    if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2180
1
      // Get the locations of the startRef, endRef.
2181
1
      SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2182
1
      SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2183
1
      // Comment out the protocol references.
2184
1
      InsertText(LessLoc, "/*");
2185
1
      InsertText(GreaterLoc, "*/");
2186
1
    }
2187
1
  }
2188
30
}
2189
2190
425
void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2191
425
  SourceLocation Loc;
2192
425
  QualType Type;
2193
425
  const FunctionProtoType *proto = nullptr;
2194
425
  if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2195
193
    Loc = VD->getLocation();
2196
193
    Type = VD->getType();
2197
193
  }
2198
232
  else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2199
163
    Loc = FD->getLocation();
2200
163
    // Check for ObjC 'id' and class types that have been adorned with protocol
2201
163
    // information (id<p>, C<p>*). The protocol references need to be rewritten!
2202
163
    const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2203
163
    assert(funcType && "missing function type");
2204
163
    proto = dyn_cast<FunctionProtoType>(funcType);
2205
163
    if (!proto)
2206
23
      return;
2207
140
    Type = proto->getReturnType();
2208
140
  }
2209
69
  else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2210
0
    Loc = FD->getLocation();
2211
0
    Type = FD->getType();
2212
0
  }
2213
69
  else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Dcl)) {
2214
69
    Loc = TD->getLocation();
2215
69
    Type = TD->getUnderlyingType();
2216
69
  }
2217
0
  else
2218
0
    return;
2219
402
2220
402
  if (needToScanForQualifiers(Type)) {
2221
5
    // Since types are unique, we need to scan the buffer.
2222
5
2223
5
    const char *endBuf = SM->getCharacterData(Loc);
2224
5
    const char *startBuf = endBuf;
2225
72
    while (*startBuf != ';' && *startBuf != '<' && 
startBuf != MainFileStart67
)
2226
67
      startBuf--; // scan backward (from the decl location) for return type.
2227
5
    const char *startRef = nullptr, *endRef = nullptr;
2228
5
    if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2229
5
      // Get the locations of the startRef, endRef.
2230
5
      SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2231
5
      SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2232
5
      // Comment out the protocol references.
2233
5
      InsertText(LessLoc, "/*");
2234
5
      InsertText(GreaterLoc, "*/");
2235
5
    }
2236
5
  }
2237
402
  if (!proto)
2238
262
      return; // most likely, was a variable
2239
140
  // Now check arguments.
2240
140
  const char *startBuf = SM->getCharacterData(Loc);
2241
140
  const char *startFuncBuf = startBuf;
2242
225
  for (unsigned i = 0; i < proto->getNumParams(); 
i++85
) {
2243
85
    if (needToScanForQualifiers(proto->getParamType(i))) {
2244
0
      // Since types are unique, we need to scan the buffer.
2245
0
2246
0
      const char *endBuf = startBuf;
2247
0
      // scan forward (from the decl location) for argument types.
2248
0
      scanToNextArgument(endBuf);
2249
0
      const char *startRef = nullptr, *endRef = nullptr;
2250
0
      if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2251
0
        // Get the locations of the startRef, endRef.
2252
0
        SourceLocation LessLoc =
2253
0
          Loc.getLocWithOffset(startRef-startFuncBuf);
2254
0
        SourceLocation GreaterLoc =
2255
0
          Loc.getLocWithOffset(endRef-startFuncBuf+1);
2256
0
        // Comment out the protocol references.
2257
0
        InsertText(LessLoc, "/*");
2258
0
        InsertText(GreaterLoc, "*/");
2259
0
      }
2260
0
      startBuf = ++endBuf;
2261
0
    }
2262
85
    else {
2263
85
      // If the function name is derived from a macro expansion, then the
2264
85
      // argument buffer will not follow the name. Need to speak with Chris.
2265
1.41k
      while (*startBuf && *startBuf != ')' && 
*startBuf != ','1.34k
)
2266
1.32k
        startBuf++; // scan forward (from the decl location) for argument types.
2267
85
      startBuf++;
2268
85
    }
2269
85
  }
2270
140
}
2271
2272
146
void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2273
146
  QualType QT = ND->getType();
2274
146
  const Type* TypePtr = QT->getAs<Type>();
2275
146
  if (!isa<TypeOfExprType>(TypePtr))
2276
143
    return;
2277
9
  
while (3
isa<TypeOfExprType>(TypePtr)) {
2278
6
    const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2279
6
    QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2280
6
    TypePtr = QT->getAs<Type>();
2281
6
  }
2282
3
  // FIXME. This will not work for multiple declarators; as in:
2283
3
  // __typeof__(a) b,c,d;
2284
3
  std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2285
3
  SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2286
3
  const char *startBuf = SM->getCharacterData(DeclLoc);
2287
3
  if (ND->getInit()) {
2288
2
    std::string Name(ND->getNameAsString());
2289
2
    TypeAsString += " " + Name + " = ";
2290
2
    Expr *E = ND->getInit();
2291
2
    SourceLocation startLoc;
2292
2
    if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2293
0
      startLoc = ECE->getLParenLoc();
2294
2
    else
2295
2
      startLoc = E->getBeginLoc();
2296
2
    startLoc = SM->getExpansionLoc(startLoc);
2297
2
    const char *endBuf = SM->getCharacterData(startLoc);
2298
2
    ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2299
2
  }
2300
1
  else {
2301
1
    SourceLocation X = ND->getEndLoc();
2302
1
    X = SM->getExpansionLoc(X);
2303
1
    const char *endBuf = SM->getCharacterData(X);
2304
1
    ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2305
1
  }
2306
3
}
2307
2308
// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2309
3
void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2310
3
  IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2311
3
  SmallVector<QualType, 16> ArgTys;
2312
3
  ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2313
3
  QualType getFuncType =
2314
3
    getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2315
3
  SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2316
3
                                               SourceLocation(),
2317
3
                                               SourceLocation(),
2318
3
                                               SelGetUidIdent, getFuncType,
2319
3
                                               nullptr, SC_Extern);
2320
3
}
2321
2322
192
void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2323
192
  // declared in <objc/objc.h>
2324
192
  if (FD->getIdentifier() &&
2325
192
      FD->getName() == "sel_registerName") {
2326
29
    SelGetUidFunctionDecl = FD;
2327
29
    return;
2328
29
  }
2329
163
  RewriteObjCQualifiedInterfaceTypes(FD);
2330
163
}
2331
2332
9
void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2333
9
  std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2334
9
  const char *argPtr = TypeString.c_str();
2335
9
  if (!strchr(argPtr, '^')) {
2336
1
    Str += TypeString;
2337
1
    return;
2338
1
  }
2339
116
  
while (8
*argPtr) {
2340
108
    Str += (*argPtr == '^' ? 
'*'8
:
*argPtr100
);
2341
108
    argPtr++;
2342
108
  }
2343
8
}
2344
2345
// FIXME. Consolidate this routine with RewriteBlockPointerType.
2346
void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2347
2
                                                  ValueDecl *VD) {
2348
2
  QualType Type = VD->getType();
2349
2
  std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2350
2
  const char *argPtr = TypeString.c_str();
2351
2
  int paren = 0;
2352
29
  while (*argPtr) {
2353
27
    switch (*argPtr) {
2354
27
      case '(':
2355
4
        Str += *argPtr;
2356
4
        paren++;
2357
4
        break;
2358
27
      case ')':
2359
4
        Str += *argPtr;
2360
4
        paren--;
2361
4
        break;
2362
27
      case '^':
2363
2
        Str += '*';
2364
2
        if (paren == 1)
2365
2
          Str += VD->getNameAsString();
2366
2
        break;
2367
27
      default:
2368
17
        Str += *argPtr;
2369
17
        break;
2370
27
    }
2371
27
    argPtr++;
2372
27
  }
2373
2
}
2374
2375
5
void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2376
5
  SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2377
5
  const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2378
5
  const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2379
5
  if (!proto)
2380
0
    return;
2381
5
  QualType Type = proto->getReturnType();
2382
5
  std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2383
5
  FdStr += " ";
2384
5
  FdStr += FD->getName();
2385
5
  FdStr +=  "(";
2386
5
  unsigned numArgs = proto->getNumParams();
2387
8
  for (unsigned i = 0; i < numArgs; 
i++3
) {
2388
3
    QualType ArgType = proto->getParamType(i);
2389
3
  RewriteBlockPointerType(FdStr, ArgType);
2390
3
  if (i+1 < numArgs)
2391
0
    FdStr += ", ";
2392
3
  }
2393
5
  if (FD->isVariadic()) {
2394
2
    FdStr +=  (numArgs > 0) ? 
", ...);\n"1
:
"...);\n"1
;
2395
2
  }
2396
3
  else
2397
3
    FdStr +=  ");\n";
2398
5
  InsertText(FunLocStart, FdStr);
2399
5
}
2400
2401
// SynthSuperConstructorFunctionDecl - id __rw_objc_super(id obj, id super);
2402
1
void RewriteModernObjC::SynthSuperConstructorFunctionDecl() {
2403
1
  if (SuperConstructorFunctionDecl)
2404
0
    return;
2405
1
  IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2406
1
  SmallVector<QualType, 16> ArgTys;
2407
1
  QualType argT = Context->getObjCIdType();
2408
1
  assert(!argT.isNull() && "Can't find 'id' type");
2409
1
  ArgTys.push_back(argT);
2410
1
  ArgTys.push_back(argT);
2411
1
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2412
1
                                               ArgTys);
2413
1
  SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2414
1
                                                     SourceLocation(),
2415
1
                                                     SourceLocation(),
2416
1
                                                     msgSendIdent, msgSendType,
2417
1
                                                     nullptr, SC_Extern);
2418
1
}
2419
2420
// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2421
29
void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2422
29
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2423
29
  SmallVector<QualType, 16> ArgTys;
2424
29
  QualType argT = Context->getObjCIdType();
2425
29
  assert(!argT.isNull() && "Can't find 'id' type");
2426
29
  ArgTys.push_back(argT);
2427
29
  argT = Context->getObjCSelType();
2428
29
  assert(!argT.isNull() && "Can't find 'SEL' type");
2429
29
  ArgTys.push_back(argT);
2430
29
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2431
29
                                               ArgTys, /*variadic=*/true);
2432
29
  MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2433
29
                                             SourceLocation(),
2434
29
                                             SourceLocation(),
2435
29
                                             msgSendIdent, msgSendType, nullptr,
2436
29
                                             SC_Extern);
2437
29
}
2438
2439
// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
2440
25
void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2441
25
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2442
25
  SmallVector<QualType, 2> ArgTys;
2443
25
  ArgTys.push_back(Context->VoidTy);
2444
25
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2445
25
                                               ArgTys, /*variadic=*/true);
2446
25
  MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2447
25
                                                  SourceLocation(),
2448
25
                                                  SourceLocation(),
2449
25
                                                  msgSendIdent, msgSendType,
2450
25
                                                  nullptr, SC_Extern);
2451
25
}
2452
2453
// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2454
25
void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2455
25
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2456
25
  SmallVector<QualType, 16> ArgTys;
2457
25
  QualType argT = Context->getObjCIdType();
2458
25
  assert(!argT.isNull() && "Can't find 'id' type");
2459
25
  ArgTys.push_back(argT);
2460
25
  argT = Context->getObjCSelType();
2461
25
  assert(!argT.isNull() && "Can't find 'SEL' type");
2462
25
  ArgTys.push_back(argT);
2463
25
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2464
25
                                               ArgTys, /*variadic=*/true);
2465
25
  MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2466
25
                                                  SourceLocation(),
2467
25
                                                  SourceLocation(),
2468
25
                                                  msgSendIdent, msgSendType,
2469
25
                                                  nullptr, SC_Extern);
2470
25
}
2471
2472
// SynthMsgSendSuperStretFunctionDecl -
2473
// id objc_msgSendSuper_stret(void);
2474
25
void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2475
25
  IdentifierInfo *msgSendIdent =
2476
25
    &Context->Idents.get("objc_msgSendSuper_stret");
2477
25
  SmallVector<QualType, 2> ArgTys;
2478
25
  ArgTys.push_back(Context->VoidTy);
2479
25
  QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2480
25
                                               ArgTys, /*variadic=*/true);
2481
25
  MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2482
25
                                                       SourceLocation(),
2483
25
                                                       SourceLocation(),
2484
25
                                                       msgSendIdent,
2485
25
                                                       msgSendType, nullptr,
2486
25
                                                       SC_Extern);
2487
25
}
2488
2489
// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2490
25
void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2491
25
  IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2492
25
  SmallVector<QualType, 16> ArgTys;
2493
25
  QualType argT = Context->getObjCIdType();
2494
25
  assert(!argT.isNull() && "Can't find 'id' type");
2495
25
  ArgTys.push_back(argT);
2496
25
  argT = Context->getObjCSelType();
2497
25
  assert(!argT.isNull() && "Can't find 'SEL' type");
2498
25
  ArgTys.push_back(argT);
2499
25
  QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2500
25
                                               ArgTys, /*variadic=*/true);
2501
25
  MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2502
25
                                                  SourceLocation(),
2503
25
                                                  SourceLocation(),
2504
25
                                                  msgSendIdent, msgSendType,
2505
25
                                                  nullptr, SC_Extern);
2506
25
}
2507
2508
// SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
2509
29
void RewriteModernObjC::SynthGetClassFunctionDecl() {
2510
29
  IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2511
29
  SmallVector<QualType, 16> ArgTys;
2512
29
  ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2513
29
  QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2514
29
                                                ArgTys);
2515
29
  GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2516
29
                                              SourceLocation(),
2517
29
                                              SourceLocation(),
2518
29
                                              getClassIdent, getClassType,
2519
29
                                              nullptr, SC_Extern);
2520
29
}
2521
2522
// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2523
25
void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2524
25
  IdentifierInfo *getSuperClassIdent =
2525
25
    &Context->Idents.get("class_getSuperclass");
2526
25
  SmallVector<QualType, 16> ArgTys;
2527
25
  ArgTys.push_back(Context->getObjCClassType());
2528
25
  QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2529
25
                                                ArgTys);
2530
25
  GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2531
25
                                                   SourceLocation(),
2532
25
                                                   SourceLocation(),
2533
25
                                                   getSuperClassIdent,
2534
25
                                                   getClassType, nullptr,
2535
25
                                                   SC_Extern);
2536
25
}
2537
2538
// SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
2539
25
void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2540
25
  IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2541
25
  SmallVector<QualType, 16> ArgTys;
2542
25
  ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2543
25
  QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2544
25
                                                ArgTys);
2545
25
  GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2546
25
                                                  SourceLocation(),
2547
25
                                                  SourceLocation(),
2548
25
                                                  getClassIdent, getClassType,
2549
25
                                                  nullptr, SC_Extern);
2550
25
}
2551
2552
13
Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2553
13
  assert (Exp != nullptr && "Expected non-null ObjCStringLiteral");
2554
13
  QualType strType = getConstantStringStructType();
2555
13
2556
13
  std::string S = "__NSConstantStringImpl_";
2557
13
2558
13
  std::string tmpName = InFileName;
2559
13
  unsigned i;
2560
1.62k
  for (i=0; i < tmpName.length(); 
i++1.60k
) {
2561
1.60k
    char c = tmpName.at(i);
2562
1.60k
    // replace any non-alphanumeric characters with '_'.
2563
1.60k
    if (!isAlphanumeric(c))
2564
233
      tmpName[i] = '_';
2565
1.60k
  }
2566
13
  S += tmpName;
2567
13
  S += "_";
2568
13
  S += utostr(NumObjCStringLiterals++);
2569
13
2570
13
  Preamble += "static __NSConstantStringImpl " + S;
2571
13
  Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2572
13
  Preamble += "0x000007c8,"; // utf8_str
2573
13
  // The pretty printer for StringLiteral handles escape characters properly.
2574
13
  std::string prettyBufS;
2575
13
  llvm::raw_string_ostream prettyBuf(prettyBufS);
2576
13
  Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2577
13
  Preamble += prettyBuf.str();
2578
13
  Preamble += ",";
2579
13
  Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2580
13
2581
13
  VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2582
13
                                   SourceLocation(), &Context->Idents.get(S),
2583
13
                                   strType, nullptr, SC_Static);
2584
13
  DeclRefExpr *DRE = new (Context)
2585
13
      DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2586
13
  Expr *Unop = new (Context)
2587
13
      UnaryOperator(DRE, UO_AddrOf, Context->getPointerType(DRE->getType()),
2588
13
                    VK_RValue, OK_Ordinary, SourceLocation(), false);
2589
13
  // cast to NSConstantString *
2590
13
  CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2591
13
                                            CK_CPointerToObjCPointerCast, Unop);
2592
13
  ReplaceStmt(Exp, cast);
2593
13
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2594
13
  return cast;
2595
13
}
2596
2597
16
Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2598
16
  unsigned IntSize =
2599
16
    static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2600
16
2601
16
  Expr *FlagExp = IntegerLiteral::Create(*Context,
2602
16
                                         llvm::APInt(IntSize, Exp->getValue()),
2603
16
                                         Context->IntTy, Exp->getLocation());
2604
16
  CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Context->ObjCBuiltinBoolTy,
2605
16
                                            CK_BitCast, FlagExp);
2606
16
  ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2607
16
                                          cast);
2608
16
  ReplaceStmt(Exp, PE);
2609
16
  return PE;
2610
16
}
2611
2612
36
Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2613
36
  // synthesize declaration of helper functions needed in this routine.
2614
36
  if (!SelGetUidFunctionDecl)
2615
0
    SynthSelGetUidFunctionDecl();
2616
36
  // use objc_msgSend() for all.
2617
36
  if (!MsgSendFunctionDecl)
2618
4
    SynthMsgSendFunctionDecl();
2619
36
  if (!GetClassFunctionDecl)
2620
4
    SynthGetClassFunctionDecl();
2621
36
2622
36
  FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2623
36
  SourceLocation StartLoc = Exp->getBeginLoc();
2624
36
  SourceLocation EndLoc = Exp->getEndLoc();
2625
36
2626
36
  // Synthesize a call to objc_msgSend().
2627
36
  SmallVector<Expr*, 4> MsgExprs;
2628
36
  SmallVector<Expr*, 4> ClsExprs;
2629
36
2630
36
  // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2631
36
  ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2632
36
  ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2633
36
2634
36
  IdentifierInfo *clsName = BoxingClass->getIdentifier();
2635
36
  ClsExprs.push_back(getStringLiteral(clsName->getName()));
2636
36
  CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2637
36
                                               StartLoc, EndLoc);
2638
36
  MsgExprs.push_back(Cls);
2639
36
2640
36
  // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2641
36
  // it will be the 2nd argument.
2642
36
  SmallVector<Expr*, 4> SelExprs;
2643
36
  SelExprs.push_back(
2644
36
      getStringLiteral(BoxingMethod->getSelector().getAsString()));
2645
36
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2646
36
                                                  SelExprs, StartLoc, EndLoc);
2647
36
  MsgExprs.push_back(SelExp);
2648
36
2649
36
  // User provided sub-expression is the 3rd, and last, argument.
2650
36
  Expr *subExpr  = Exp->getSubExpr();
2651
36
  if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(subExpr)) {
2652
4
    QualType type = ICE->getType();
2653
4
    const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2654
4
    CastKind CK = CK_BitCast;
2655
4
    if (SubExpr->getType()->isIntegralType(*Context) && 
type->isBooleanType()2
)
2656
0
      CK = CK_IntegralToBoolean;
2657
4
    subExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, subExpr);
2658
4
  }
2659
36
  MsgExprs.push_back(subExpr);
2660
36
2661
36
  SmallVector<QualType, 4> ArgTypes;
2662
36
  ArgTypes.push_back(Context->getObjCClassType());
2663
36
  ArgTypes.push_back(Context->getObjCSelType());
2664
36
  for (const auto PI : BoxingMethod->parameters())
2665
36
    ArgTypes.push_back(PI->getType());
2666
36
2667
36
  QualType returnType = Exp->getType();
2668
36
  // Get the type, we will need to reference it in a couple spots.
2669
36
  QualType msgSendType = MsgSendFlavor->getType();
2670
36
2671
36
  // Create a reference to the objc_msgSend() declaration.
2672
36
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
2673
36
      *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2674
36
2675
36
  CastExpr *cast = NoTypeInfoCStyleCastExpr(
2676
36
      Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2677
36
2678
36
  // Now do the "normal" pointer to function cast.
2679
36
  QualType castType =
2680
36
    getSimpleFunctionType(returnType, ArgTypes, BoxingMethod->isVariadic());
2681
36
  castType = Context->getPointerType(castType);
2682
36
  cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2683
36
                                  cast);
2684
36
2685
36
  // Don't forget the parens to enforce the proper binding.
2686
36
  ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2687
36
2688
36
  const FunctionType *FT = msgSendType->getAs<FunctionType>();
2689
36
  CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2690
36
                                  VK_RValue, EndLoc);
2691
36
  ReplaceStmt(Exp, CE);
2692
36
  return CE;
2693
36
}
2694
2695
5
Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2696
5
  // synthesize declaration of helper functions needed in this routine.
2697
5
  if (!SelGetUidFunctionDecl)
2698
0
    SynthSelGetUidFunctionDecl();
2699
5
  // use objc_msgSend() for all.
2700
5
  if (!MsgSendFunctionDecl)
2701
0
    SynthMsgSendFunctionDecl();
2702
5
  if (!GetClassFunctionDecl)
2703
0
    SynthGetClassFunctionDecl();
2704
5
2705
5
  FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2706
5
  SourceLocation StartLoc = Exp->getBeginLoc();
2707
5
  SourceLocation EndLoc = Exp->getEndLoc();
2708
5
2709
5
  // Build the expression: __NSContainer_literal(int, ...).arr
2710
5
  QualType IntQT = Context->IntTy;
2711
5
  QualType NSArrayFType =
2712
5
    getSimpleFunctionType(Context->VoidTy, IntQT, true);
2713
5
  std::string NSArrayFName("__NSContainer_literal");
2714
5
  FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(NSArrayFName);
2715
5
  DeclRefExpr *NSArrayDRE = new (Context) DeclRefExpr(
2716
5
      *Context, NSArrayFD, false, NSArrayFType, VK_RValue, SourceLocation());
2717
5
2718
5
  SmallVector<Expr*, 16> InitExprs;
2719
5
  unsigned NumElements = Exp->getNumElements();
2720
5
  unsigned UnsignedIntSize =
2721
5
    static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2722
5
  Expr *count = IntegerLiteral::Create(*Context,
2723
5
                                       llvm::APInt(UnsignedIntSize, NumElements),
2724
5
                                       Context->UnsignedIntTy, SourceLocation());
2725
5
  InitExprs.push_back(count);
2726
18
  for (unsigned i = 0; i < NumElements; 
i++13
)
2727
13
    InitExprs.push_back(Exp->getElement(i));
2728
5
  Expr *NSArrayCallExpr =
2729
5
      CallExpr::Create(*Context, NSArrayDRE, InitExprs, NSArrayFType, VK_LValue,
2730
5
                       SourceLocation());
2731
5
2732
5
  FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2733
5
                                    SourceLocation(),
2734
5
                                    &Context->Idents.get("arr"),
2735
5
                                    Context->getPointerType(Context->VoidPtrTy),
2736
5
                                    nullptr, /*BitWidth=*/nullptr,
2737
5
                                    /*Mutable=*/true, ICIS_NoInit);
2738
5
  MemberExpr *ArrayLiteralME =
2739
5
      MemberExpr::CreateImplicit(*Context, NSArrayCallExpr, false, ARRFD,
2740
5
                                 ARRFD->getType(), VK_LValue, OK_Ordinary);
2741
5
  QualType ConstIdT = Context->getObjCIdType().withConst();
2742
5
  CStyleCastExpr * ArrayLiteralObjects =
2743
5
    NoTypeInfoCStyleCastExpr(Context,
2744
5
                             Context->getPointerType(ConstIdT),
2745
5
                             CK_BitCast,
2746
5
                             ArrayLiteralME);
2747
5
2748
5
  // Synthesize a call to objc_msgSend().
2749
5
  SmallVector<Expr*, 32> MsgExprs;
2750
5
  SmallVector<Expr*, 4> ClsExprs;
2751
5
  QualType expType = Exp->getType();
2752
5
2753
5
  // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2754
5
  ObjCInterfaceDecl *Class =
2755
5
    expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
2756
5
2757
5
  IdentifierInfo *clsName = Class->getIdentifier();
2758
5
  ClsExprs.push_back(getStringLiteral(clsName->getName()));
2759
5
  CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2760
5
                                               StartLoc, EndLoc);
2761
5
  MsgExprs.push_back(Cls);
2762
5
2763
5
  // Create a call to sel_registerName("arrayWithObjects:count:").
2764
5
  // it will be the 2nd argument.
2765
5
  SmallVector<Expr*, 4> SelExprs;
2766
5
  ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2767
5
  SelExprs.push_back(
2768
5
      getStringLiteral(ArrayMethod->getSelector().getAsString()));
2769
5
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2770
5
                                                  SelExprs, StartLoc, EndLoc);
2771
5
  MsgExprs.push_back(SelExp);
2772
5
2773
5
  // (const id [])objects
2774
5
  MsgExprs.push_back(ArrayLiteralObjects);
2775
5
2776
5
  // (NSUInteger)cnt
2777
5
  Expr *cnt = IntegerLiteral::Create(*Context,
2778
5
                                     llvm::APInt(UnsignedIntSize, NumElements),
2779
5
                                     Context->UnsignedIntTy, SourceLocation());
2780
5
  MsgExprs.push_back(cnt);
2781
5
2782
5
  SmallVector<QualType, 4> ArgTypes;
2783
5
  ArgTypes.push_back(Context->getObjCClassType());
2784
5
  ArgTypes.push_back(Context->getObjCSelType());
2785
5
  for (const auto *PI : ArrayMethod->parameters())
2786
10
    ArgTypes.push_back(PI->getType());
2787
5
2788
5
  QualType returnType = Exp->getType();
2789
5
  // Get the type, we will need to reference it in a couple spots.
2790
5
  QualType msgSendType = MsgSendFlavor->getType();
2791
5
2792
5
  // Create a reference to the objc_msgSend() declaration.
2793
5
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
2794
5
      *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2795
5
2796
5
  CastExpr *cast = NoTypeInfoCStyleCastExpr(
2797
5
      Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2798
5
2799
5
  // Now do the "normal" pointer to function cast.
2800
5
  QualType castType =
2801
5
  getSimpleFunctionType(returnType, ArgTypes, ArrayMethod->isVariadic());
2802
5
  castType = Context->getPointerType(castType);
2803
5
  cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2804
5
                                  cast);
2805
5
2806
5
  // Don't forget the parens to enforce the proper binding.
2807
5
  ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2808
5
2809
5
  const FunctionType *FT = msgSendType->getAs<FunctionType>();
2810
5
  CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2811
5
                                  VK_RValue, EndLoc);
2812
5
  ReplaceStmt(Exp, CE);
2813
5
  return CE;
2814
5
}
2815
2816
2
Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2817
2
  // synthesize declaration of helper functions needed in this routine.
2818
2
  if (!SelGetUidFunctionDecl)
2819
0
    SynthSelGetUidFunctionDecl();
2820
2
  // use objc_msgSend() for all.
2821
2
  if (!MsgSendFunctionDecl)
2822
0
    SynthMsgSendFunctionDecl();
2823
2
  if (!GetClassFunctionDecl)
2824
0
    SynthGetClassFunctionDecl();
2825
2
2826
2
  FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2827
2
  SourceLocation StartLoc = Exp->getBeginLoc();
2828
2
  SourceLocation EndLoc = Exp->getEndLoc();
2829
2
2830
2
  // Build the expression: __NSContainer_literal(int, ...).arr
2831
2
  QualType IntQT = Context->IntTy;
2832
2
  QualType NSDictFType =
2833
2
    getSimpleFunctionType(Context->VoidTy, IntQT, true);
2834
2
  std::string NSDictFName("__NSContainer_literal");
2835
2
  FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(NSDictFName);
2836
2
  DeclRefExpr *NSDictDRE = new (Context) DeclRefExpr(
2837
2
      *Context, NSDictFD, false, NSDictFType, VK_RValue, SourceLocation());
2838
2
2839
2
  SmallVector<Expr*, 16> KeyExprs;
2840
2
  SmallVector<Expr*, 16> ValueExprs;
2841
2
2842
2
  unsigned NumElements = Exp->getNumElements();
2843
2
  unsigned UnsignedIntSize =
2844
2
    static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2845
2
  Expr *count = IntegerLiteral::Create(*Context,
2846
2
                                       llvm::APInt(UnsignedIntSize, NumElements),
2847
2
                                       Context->UnsignedIntTy, SourceLocation());
2848
2
  KeyExprs.push_back(count);
2849
2
  ValueExprs.push_back(count);
2850
8
  for (unsigned i = 0; i < NumElements; 
i++6
) {
2851
6
    ObjCDictionaryElement Element = Exp->getKeyValueElement(i);
2852
6
    KeyExprs.push_back(Element.Key);
2853
6
    ValueExprs.push_back(Element.Value);
2854
6
  }
2855
2
2856
2
  // (const id [])objects
2857
2
  Expr *NSValueCallExpr =
2858
2
      CallExpr::Create(*Context, NSDictDRE, ValueExprs, NSDictFType, VK_LValue,
2859
2
                       SourceLocation());
2860
2
2861
2
  FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2862
2
                                       SourceLocation(),
2863
2
                                       &Context->Idents.get("arr"),
2864
2
                                       Context->getPointerType(Context->VoidPtrTy),
2865
2
                                       nullptr, /*BitWidth=*/nullptr,
2866
2
                                       /*Mutable=*/true, ICIS_NoInit);
2867
2
  MemberExpr *DictLiteralValueME =
2868
2
      MemberExpr::CreateImplicit(*Context, NSValueCallExpr, false, ARRFD,
2869
2
                                 ARRFD->getType(), VK_LValue, OK_Ordinary);
2870
2
  QualType ConstIdT = Context->getObjCIdType().withConst();
2871
2
  CStyleCastExpr * DictValueObjects =
2872
2
    NoTypeInfoCStyleCastExpr(Context,
2873
2
                             Context->getPointerType(ConstIdT),
2874
2
                             CK_BitCast,
2875
2
                             DictLiteralValueME);
2876
2
  // (const id <NSCopying> [])keys
2877
2
  Expr *NSKeyCallExpr = CallExpr::Create(
2878
2
      *Context, NSDictDRE, KeyExprs, NSDictFType, VK_LValue, SourceLocation());
2879
2
2880
2
  MemberExpr *DictLiteralKeyME =
2881
2
      MemberExpr::CreateImplicit(*Context, NSKeyCallExpr, false, ARRFD,
2882
2
                                 ARRFD->getType(), VK_LValue, OK_Ordinary);
2883
2
2884
2
  CStyleCastExpr * DictKeyObjects =
2885
2
    NoTypeInfoCStyleCastExpr(Context,
2886
2
                             Context->getPointerType(ConstIdT),
2887
2
                             CK_BitCast,
2888
2
                             DictLiteralKeyME);
2889
2
2890
2
  // Synthesize a call to objc_msgSend().
2891
2
  SmallVector<Expr*, 32> MsgExprs;
2892
2
  SmallVector<Expr*, 4> ClsExprs;
2893
2
  QualType expType = Exp->getType();
2894
2
2895
2
  // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2896
2
  ObjCInterfaceDecl *Class =
2897
2
  expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
2898
2
2899
2
  IdentifierInfo *clsName = Class->getIdentifier();
2900
2
  ClsExprs.push_back(getStringLiteral(clsName->getName()));
2901
2
  CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2902
2
                                               StartLoc, EndLoc);
2903
2
  MsgExprs.push_back(Cls);
2904
2
2905
2
  // Create a call to sel_registerName("arrayWithObjects:count:").
2906
2
  // it will be the 2nd argument.
2907
2
  SmallVector<Expr*, 4> SelExprs;
2908
2
  ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
2909
2
  SelExprs.push_back(getStringLiteral(DictMethod->getSelector().getAsString()));
2910
2
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2911
2
                                                  SelExprs, StartLoc, EndLoc);
2912
2
  MsgExprs.push_back(SelExp);
2913
2
2914
2
  // (const id [])objects
2915
2
  MsgExprs.push_back(DictValueObjects);
2916
2
2917
2
  // (const id <NSCopying> [])keys
2918
2
  MsgExprs.push_back(DictKeyObjects);
2919
2
2920
2
  // (NSUInteger)cnt
2921
2
  Expr *cnt = IntegerLiteral::Create(*Context,
2922
2
                                     llvm::APInt(UnsignedIntSize, NumElements),
2923
2
                                     Context->UnsignedIntTy, SourceLocation());
2924
2
  MsgExprs.push_back(cnt);
2925
2
2926
2
  SmallVector<QualType, 8> ArgTypes;
2927
2
  ArgTypes.push_back(Context->getObjCClassType());
2928
2
  ArgTypes.push_back(Context->getObjCSelType());
2929
6
  for (const auto *PI : DictMethod->parameters()) {
2930
6
    QualType T = PI->getType();
2931
6
    if (const PointerType* PT = T->getAs<PointerType>()) {
2932
4
      QualType PointeeTy = PT->getPointeeType();
2933
4
      convertToUnqualifiedObjCType(PointeeTy);
2934
4
      T = Context->getPointerType(PointeeTy);
2935
4
    }
2936
6
    ArgTypes.push_back(T);
2937
6
  }
2938
2
2939
2
  QualType returnType = Exp->getType();
2940
2
  // Get the type, we will need to reference it in a couple spots.
2941
2
  QualType msgSendType = MsgSendFlavor->getType();
2942
2
2943
2
  // Create a reference to the objc_msgSend() declaration.
2944
2
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
2945
2
      *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2946
2
2947
2
  CastExpr *cast = NoTypeInfoCStyleCastExpr(
2948
2
      Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2949
2
2950
2
  // Now do the "normal" pointer to function cast.
2951
2
  QualType castType =
2952
2
  getSimpleFunctionType(returnType, ArgTypes, DictMethod->isVariadic());
2953
2
  castType = Context->getPointerType(castType);
2954
2
  cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2955
2
                                  cast);
2956
2
2957
2
  // Don't forget the parens to enforce the proper binding.
2958
2
  ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2959
2
2960
2
  const FunctionType *FT = msgSendType->getAs<FunctionType>();
2961
2
  CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2962
2
                                  VK_RValue, EndLoc);
2963
2
  ReplaceStmt(Exp, CE);
2964
2
  return CE;
2965
2
}
2966
2967
// struct __rw_objc_super {
2968
//   struct objc_object *object; struct objc_object *superClass;
2969
// };
2970
2
QualType RewriteModernObjC::getSuperStructType() {
2971
2
  if (!SuperStructDecl) {
2972
1
    SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2973
1
                                         SourceLocation(), SourceLocation(),
2974
1
                                         &Context->Idents.get("__rw_objc_super"));
2975
1
    QualType FieldTypes[2];
2976
1
2977
1
    // struct objc_object *object;
2978
1
    FieldTypes[0] = Context->getObjCIdType();
2979
1
    // struct objc_object *superClass;
2980
1
    FieldTypes[1] = Context->getObjCIdType();
2981
1
2982
1
    // Create fields
2983
3
    for (unsigned i = 0; i < 2; 
++i2
) {
2984
2
      SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2985
2
                                                 SourceLocation(),
2986
2
                                                 SourceLocation(), nullptr,
2987
2
                                                 FieldTypes[i], nullptr,
2988
2
                                                 /*BitWidth=*/nullptr,
2989
2
                                                 /*Mutable=*/false,
2990
2
                                                 ICIS_NoInit));
2991
2
    }
2992
1
2993
1
    SuperStructDecl->completeDefinition();
2994
1
  }
2995
2
  return Context->getTagDeclType(SuperStructDecl);
2996
2
}
2997
2998
13
QualType RewriteModernObjC::getConstantStringStructType() {
2999
13
  if (!ConstantStringDecl) {
3000
3
    ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3001
3
                                            SourceLocation(), SourceLocation(),
3002
3
                         &Context->Idents.get("__NSConstantStringImpl"));
3003
3
    QualType FieldTypes[4];
3004
3
3005
3
    // struct objc_object *receiver;
3006
3
    FieldTypes[0] = Context->getObjCIdType();
3007
3
    // int flags;
3008
3
    FieldTypes[1] = Context->IntTy;
3009
3
    // char *str;
3010
3
    FieldTypes[2] = Context->getPointerType(Context->CharTy);
3011
3
    // long length;
3012
3
    FieldTypes[3] = Context->LongTy;
3013
3
3014
3
    // Create fields
3015
15
    for (unsigned i = 0; i < 4; 
++i12
) {
3016
12
      ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
3017
12
                                                    ConstantStringDecl,
3018
12
                                                    SourceLocation(),
3019
12
                                                    SourceLocation(), nullptr,
3020
12
                                                    FieldTypes[i], nullptr,
3021
12
                                                    /*BitWidth=*/nullptr,
3022
12
                                                    /*Mutable=*/true,
3023
12
                                                    ICIS_NoInit));
3024
12
    }
3025
3
3026
3
    ConstantStringDecl->completeDefinition();
3027
3
  }
3028
13
  return Context->getTagDeclType(ConstantStringDecl);
3029
13
}
3030
3031
/// getFunctionSourceLocation - returns start location of a function
3032
/// definition. Complication arises when function has declared as
3033
/// extern "C" or extern "C" {...}
3034
static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3035
75
                                                 FunctionDecl *FD) {
3036
75
  if (FD->isExternC()  && 
!FD->isMain()16
) {
3037
16
    const DeclContext *DC = FD->getDeclContext();
3038
16
    if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3039
12
      // if it is extern "C" {...}, return function decl's own location.
3040
12
      if (!LSD->getRBraceLoc().isValid())
3041
4
        return LSD->getExternLoc();
3042
71
  }
3043
71
  if (FD->getStorageClass() != SC_None)
3044
5
    R.RewriteBlockLiteralFunctionDecl(FD);
3045
71
  return FD->getTypeSpecStartLoc();
3046
71
}
3047
3048
162
void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3049
162
3050
162
  SourceLocation Location = D->getLocation();
3051
162
3052
162
  if (Location.isFileID() && GenerateLineInfo) {
3053
3
    std::string LineString("\n#line ");
3054
3
    PresumedLoc PLoc = SM->getPresumedLoc(Location);
3055
3
    LineString += utostr(PLoc.getLine());
3056
3
    LineString += " \"";
3057
3
    LineString += Lexer::Stringify(PLoc.getFilename());
3058
3
    if (isa<ObjCMethodDecl>(D))
3059
1
      LineString += "\"";
3060
2
    else LineString += "\"\n";
3061
3
3062
3
    Location = D->getBeginLoc();
3063
3
    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
3064
2
      if (FD->isExternC()  && 
!FD->isMain()0
) {
3065
0
        const DeclContext *DC = FD->getDeclContext();
3066
0
        if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3067
0
          // if it is extern "C" {...}, return function decl's own location.
3068
0
          if (!LSD->getRBraceLoc().isValid())
3069
0
            Location = LSD->getExternLoc();
3070
0
      }
3071
2
    }
3072
3
    InsertText(Location, LineString);
3073
3
  }
3074
162
}
3075
3076
/// SynthMsgSendStretCallExpr - This routine translates message expression
3077
/// into a call to objc_msgSend_stret() entry point. Tricky part is that
3078
/// nil check on receiver must be performed before calling objc_msgSend_stret.
3079
/// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3080
/// msgSendType - function type of objc_msgSend_stret(...)
3081
/// returnType - Result type of the method being synthesized.
3082
/// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3083
/// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3084
/// starting with receiver.
3085
/// Method - Method being rewritten.
3086
Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3087
                                                 QualType returnType,
3088
                                                 SmallVectorImpl<QualType> &ArgTypes,
3089
                                                 SmallVectorImpl<Expr*> &MsgExprs,
3090
12
                                                 ObjCMethodDecl *Method) {
3091
12
  // Now do the "normal" pointer to function cast.
3092
12
  QualType FuncType = getSimpleFunctionType(
3093
12
      returnType, ArgTypes, Method ? Method->isVariadic() : 
false0
);
3094
12
  QualType castType = Context->getPointerType(FuncType);
3095
12
3096
12
  // build type for containing the objc_msgSend_stret object.
3097
12
  static unsigned stretCount=0;
3098
12
  std::string name = "__Stret"; name += utostr(stretCount);
3099
12
  std::string str =
3100
12
    "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3101
12
  str += "namespace {\n";
3102
12
  str += "struct "; str += name;
3103
12
  str += " {\n\t";
3104
12
  str += name;
3105
12
  str += "(id receiver, SEL sel";
3106
22
  for (unsigned i = 2; i < ArgTypes.size(); 
i++10
) {
3107
10
    std::string ArgName = "arg"; ArgName += utostr(i);
3108
10
    ArgTypes[i].getAsStringInternal(ArgName, Context->getPrintingPolicy());
3109
10
    str += ", "; str += ArgName;
3110
10
  }
3111
12
  // could be vararg.
3112
19
  for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); 
i++7
) {
3113
7
    std::string ArgName = "arg"; ArgName += utostr(i);
3114
7
    MsgExprs[i]->getType().getAsStringInternal(ArgName,
3115
7
                                               Context->getPrintingPolicy());
3116
7
    str += ", "; str += ArgName;
3117
7
  }
3118
12
3119
12
  str += ") {\n";
3120
12
  str += "\t  unsigned size = sizeof(";
3121
12
  str += returnType.getAsString(Context->getPrintingPolicy()); str += ");\n";
3122
12
3123
12
  str += "\t  if (size == 1 || size == 2 || size == 4 || size == 8)\n";
3124
12
3125
12
  str += "\t    s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3126
12
  str += ")(void *)objc_msgSend)(receiver, sel";
3127
22
  for (unsigned i = 2; i < ArgTypes.size(); 
i++10
) {
3128
10
    str += ", arg"; str += utostr(i);
3129
10
  }
3130
12
  // could be vararg.
3131
19
  for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); 
i++7
) {
3132
7
    str += ", arg"; str += utostr(i);
3133
7
  }
3134
12
  str+= ");\n";
3135
12
3136
12
  str += "\t  else if (receiver == 0)\n";
3137
12
  str += "\t    memset((void*)&s, 0, sizeof(s));\n";
3138
12
  str += "\t  else\n";
3139
12
3140
12
  str += "\t    s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3141
12
  str += ")(void *)objc_msgSend_stret)(receiver, sel";
3142
22
  for (unsigned i = 2; i < ArgTypes.size(); 
i++10
) {
3143
10
    str += ", arg"; str += utostr(i);
3144
10
  }
3145
12
  // could be vararg.
3146
19
  for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); 
i++7
) {
3147
7
    str += ", arg"; str += utostr(i);
3148
7
  }
3149
12
  str += ");\n";
3150
12
3151
12
  str += "\t}\n";
3152
12
  str += "\t"; str += returnType.getAsString(Context->getPrintingPolicy());
3153
12
  str += " s;\n";
3154
12
  str += "};\n};\n\n";
3155
12
  SourceLocation FunLocStart;
3156
12
  if (CurFunctionDef)
3157
11
    FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
3158
1
  else {
3159
1
    assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null");
3160
1
    FunLocStart = CurMethodDef->getBeginLoc();
3161
1
  }
3162
12
3163
12
  InsertText(FunLocStart, str);
3164
12
  ++stretCount;
3165
12
3166
12
  // AST for __Stretn(receiver, args).s;
3167
12
  IdentifierInfo *ID = &Context->Idents.get(name);
3168
12
  FunctionDecl *FD =
3169
12
      FunctionDecl::Create(*Context, TUDecl, SourceLocation(), SourceLocation(),
3170
12
                           ID, FuncType, nullptr, SC_Extern, false, false);
3171
12
  DeclRefExpr *DRE = new (Context)
3172
12
      DeclRefExpr(*Context, FD, false, castType, VK_RValue, SourceLocation());
3173
12
  CallExpr *STCE = CallExpr::Create(*Context, DRE, MsgExprs, castType,
3174
12
                                    VK_LValue, SourceLocation());
3175
12
3176
12
  FieldDecl *FieldD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3177
12
                                    SourceLocation(),
3178
12
                                    &Context->Idents.get("s"),
3179
12
                                    returnType, nullptr,
3180
12
                                    /*BitWidth=*/nullptr,
3181
12
                                    /*Mutable=*/true, ICIS_NoInit);
3182
12
  MemberExpr *ME = MemberExpr::CreateImplicit(
3183
12
      *Context, STCE, false, FieldD, FieldD->getType(), VK_LValue, OK_Ordinary);
3184
12
3185
12
  return ME;
3186
12
}
3187
3188
Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3189
                                    SourceLocation StartLoc,
3190
104
                                    SourceLocation EndLoc) {
3191
104
  if (!SelGetUidFunctionDecl)
3192
3
    SynthSelGetUidFunctionDecl();
3193
104
  if (!MsgSendFunctionDecl)
3194
25
    SynthMsgSendFunctionDecl();
3195
104
  if (!MsgSendSuperFunctionDecl)
3196
25
    SynthMsgSendSuperFunctionDecl();
3197
104
  if (!MsgSendStretFunctionDecl)
3198
25
    SynthMsgSendStretFunctionDecl();
3199
104
  if (!MsgSendSuperStretFunctionDecl)
3200
25
    SynthMsgSendSuperStretFunctionDecl();
3201
104
  if (!MsgSendFpretFunctionDecl)
3202
25
    SynthMsgSendFpretFunctionDecl();
3203
104
  if (!GetClassFunctionDecl)
3204
25
    SynthGetClassFunctionDecl();
3205
104
  if (!GetSuperClassFunctionDecl)
3206
25
    SynthGetSuperClassFunctionDecl();
3207
104
  if (!GetMetaClassFunctionDecl)
3208
25
    SynthGetMetaClassFunctionDecl();
3209
104
3210
104
  // default to objc_msgSend().
3211
104
  FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3212
104
  // May need to use objc_msgSend_stret() as well.
3213
104
  FunctionDecl *MsgSendStretFlavor = nullptr;
3214
104
  if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3215
98
    QualType resultType = mDecl->getReturnType();
3216
98
    if (resultType->isRecordType())
3217
12
      MsgSendStretFlavor = MsgSendStretFunctionDecl;
3218
86
    else if (resultType->isRealFloatingType())
3219
0
      MsgSendFlavor = MsgSendFpretFunctionDecl;
3220
98
  }
3221
104
3222
104
  // Synthesize a call to objc_msgSend().
3223
104
  SmallVector<Expr*, 8> MsgExprs;
3224
104
  switch (Exp->getReceiverKind()) {
3225
104
  case ObjCMessageExpr::SuperClass: {
3226
0
    MsgSendFlavor = MsgSendSuperFunctionDecl;
3227
0
    if (MsgSendStretFlavor)
3228
0
      MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3229
0
    assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3230
0
3231
0
    ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3232
0
3233
0
    SmallVector<Expr*, 4> InitExprs;
3234
0
3235
0
    // set the receiver to self, the first argument to all methods.
3236
0
    InitExprs.push_back(
3237
0
      NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3238
0
                               CK_BitCast,
3239
0
                   new (Context) DeclRefExpr(*Context,
3240
0
                                             CurMethodDef->getSelfDecl(),
3241
0
                                             false,
3242
0
                                             Context->getObjCIdType(),
3243
0
                                             VK_RValue,
3244
0
                                             SourceLocation()))
3245
0
                        ); // set the 'receiver'.
3246
0
3247
0
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3248
0
    SmallVector<Expr*, 8> ClsExprs;
3249
0
    ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3250
0
    // (Class)objc_getClass("CurrentClass")
3251
0
    CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
3252
0
                                                 ClsExprs, StartLoc, EndLoc);
3253
0
    ClsExprs.clear();
3254
0
    ClsExprs.push_back(Cls);
3255
0
    Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3256
0
                                       StartLoc, EndLoc);
3257
0
3258
0
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3259
0
    // To turn off a warning, type-cast to 'id'
3260
0
    InitExprs.push_back( // set 'super class', using class_getSuperclass().
3261
0
                        NoTypeInfoCStyleCastExpr(Context,
3262
0
                                                 Context->getObjCIdType(),
3263
0
                                                 CK_BitCast, Cls));
3264
0
    // struct __rw_objc_super
3265
0
    QualType superType = getSuperStructType();
3266
0
    Expr *SuperRep;
3267
0
3268
0
    if (LangOpts.MicrosoftExt) {
3269
0
      SynthSuperConstructorFunctionDecl();
3270
0
      // Simulate a constructor call...
3271
0
      DeclRefExpr *DRE = new (Context)
3272
0
          DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3273
0
                      VK_LValue, SourceLocation());
3274
0
      SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3275
0
                                  VK_LValue, SourceLocation());
3276
0
      // The code for super is a little tricky to prevent collision with
3277
0
      // the structure definition in the header. The rewriter has it's own
3278
0
      // internal definition (__rw_objc_super) that is uses. This is why
3279
0
      // we need the cast below. For example:
3280
0
      // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3281
0
      //
3282
0
      SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3283
0
                               Context->getPointerType(SuperRep->getType()),
3284
0
                                             VK_RValue, OK_Ordinary,
3285
0
                                             SourceLocation(), false);
3286
0
      SuperRep = NoTypeInfoCStyleCastExpr(Context,
3287
0
                                          Context->getPointerType(superType),
3288
0
                                          CK_BitCast, SuperRep);
3289
0
    } else {
3290
0
      // (struct __rw_objc_super) { <exprs from above> }
3291
0
      InitListExpr *ILE =
3292
0
        new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3293
0
                                   SourceLocation());
3294
0
      TypeSourceInfo *superTInfo
3295
0
        = Context->getTrivialTypeSourceInfo(superType);
3296
0
      SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3297
0
                                                   superType, VK_LValue,
3298
0
                                                   ILE, false);
3299
0
      // struct __rw_objc_super *
3300
0
      SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3301
0
                               Context->getPointerType(SuperRep->getType()),
3302
0
                                             VK_RValue, OK_Ordinary,
3303
0
                                             SourceLocation(), false);
3304
0
    }
3305
0
    MsgExprs.push_back(SuperRep);
3306
0
    break;
3307
104
  }
3308
104
3309
104
  case ObjCMessageExpr::Class: {
3310
23
    SmallVector<Expr*, 8> ClsExprs;
3311
23
    ObjCInterfaceDecl *Class
3312
23
      = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
3313
23
    IdentifierInfo *clsName = Class->getIdentifier();
3314
23
    ClsExprs.push_back(getStringLiteral(clsName->getName()));
3315
23
    CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3316
23
                                                 StartLoc, EndLoc);
3317
23
    CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
3318
23
                                                 Context->getObjCIdType(),
3319
23
                                                 CK_BitCast, Cls);
3320
23
    MsgExprs.push_back(ArgExpr);
3321
23
    break;
3322
104
  }
3323
104
3324
104
  case ObjCMessageExpr::SuperInstance:{
3325
1
    MsgSendFlavor = MsgSendSuperFunctionDecl;
3326
1
    if (MsgSendStretFlavor)
3327
0
      MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3328
1
    assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
3329
1
    ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3330
1
    SmallVector<Expr*, 4> InitExprs;
3331
1
3332
1
    InitExprs.push_back(
3333
1
      NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3334
1
                               CK_BitCast,
3335
1
                   new (Context) DeclRefExpr(*Context,
3336
1
                                             CurMethodDef->getSelfDecl(),
3337
1
                                             false,
3338
1
                                             Context->getObjCIdType(),
3339
1
                                             VK_RValue, SourceLocation()))
3340
1
                        ); // set the 'receiver'.
3341
1
3342
1
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3343
1
    SmallVector<Expr*, 8> ClsExprs;
3344
1
    ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3345
1
    // (Class)objc_getClass("CurrentClass")
3346
1
    CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3347
1
                                                 StartLoc, EndLoc);
3348
1
    ClsExprs.clear();
3349
1
    ClsExprs.push_back(Cls);
3350
1
    Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3351
1
                                       StartLoc, EndLoc);
3352
1
3353
1
    // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3354
1
    // To turn off a warning, type-cast to 'id'
3355
1
    InitExprs.push_back(
3356
1
      // set 'super class', using class_getSuperclass().
3357
1
      NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3358
1
                               CK_BitCast, Cls));
3359
1
    // struct __rw_objc_super
3360
1
    QualType superType = getSuperStructType();
3361
1
    Expr *SuperRep;
3362
1
3363
1
    if (LangOpts.MicrosoftExt) {
3364
1
      SynthSuperConstructorFunctionDecl();
3365
1
      // Simulate a constructor call...
3366
1
      DeclRefExpr *DRE = new (Context)
3367
1
          DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3368
1
                      VK_LValue, SourceLocation());
3369
1
      SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3370
1
                                  VK_LValue, SourceLocation());
3371
1
      // The code for super is a little tricky to prevent collision with
3372
1
      // the structure definition in the header. The rewriter has it's own
3373
1
      // internal definition (__rw_objc_super) that is uses. This is why
3374
1
      // we need the cast below. For example:
3375
1
      // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3376
1
      //
3377
1
      SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3378
1
                               Context->getPointerType(SuperRep->getType()),
3379
1
                               VK_RValue, OK_Ordinary,
3380
1
                               SourceLocation(), false);
3381
1
      SuperRep = NoTypeInfoCStyleCastExpr(Context,
3382
1
                               Context->getPointerType(superType),
3383
1
                               CK_BitCast, SuperRep);
3384
1
    } else {
3385
0
      // (struct __rw_objc_super) { <exprs from above> }
3386
0
      InitListExpr *ILE =
3387
0
        new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3388
0
                                   SourceLocation());
3389
0
      TypeSourceInfo *superTInfo
3390
0
        = Context->getTrivialTypeSourceInfo(superType);
3391
0
      SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3392
0
                                                   superType, VK_RValue, ILE,
3393
0
                                                   false);
3394
0
    }
3395
1
    MsgExprs.push_back(SuperRep);
3396
1
    break;
3397
104
  }
3398
104
3399
104
  case ObjCMessageExpr::Instance: {
3400
80
    // Remove all type-casts because it may contain objc-style types; e.g.
3401
80
    // Foo<Proto> *.
3402
80
    Expr *recExpr = Exp->getInstanceReceiver();
3403
81
    while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
3404
1
      recExpr = CE->getSubExpr();
3405
80
    CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3406
80
                    ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3407
0
                                     ? CK_BlockPointerToObjCPointerCast
3408
0
                                     : CK_CPointerToObjCPointerCast;
3409
80
3410
80
    recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3411
80
                                       CK, recExpr);
3412
80
    MsgExprs.push_back(recExpr);
3413
80
    break;
3414
104
  }
3415
104
  }
3416
104
3417
104
  // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3418
104
  SmallVector<Expr*, 8> SelExprs;
3419
104
  SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
3420
104
  CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
3421
104
                                                  SelExprs, StartLoc, EndLoc);
3422
104
  MsgExprs.push_back(SelExp);
3423
104
3424
104
  // Now push any user supplied arguments.
3425
158
  for (unsigned i = 0; i < Exp->getNumArgs(); 
i++54
) {
3426
54
    Expr *userExpr = Exp->getArg(i);
3427
54
    // Make all implicit casts explicit...ICE comes in handy:-)
3428
54
    if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
3429
28
      // Reuse the ICE type, it is exactly what the doctor ordered.
3430
28
      QualType type = ICE->getType();
3431
28
      if (needToScanForQualifiers(type))
3432
0
        type = Context->getObjCIdType();
3433
28
      // Make sure we convert "type (^)(...)" to "type (*)(...)".
3434
28
      (void)convertBlockPointerToFunctionPointer(type);
3435
28
      const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3436
28
      CastKind CK;
3437
28
      if (SubExpr->getType()->isIntegralType(*Context) &&
3438
28
          
type->isBooleanType()13
) {
3439
0
        CK = CK_IntegralToBoolean;
3440
28
      } else if (type->isObjCObjectPointerType()) {
3441
13
        if (SubExpr->getType()->isBlockPointerType()) {
3442
0
          CK = CK_BlockPointerToObjCPointerCast;
3443
13
        } else if (SubExpr->getType()->isPointerType()) {
3444
0
          CK = CK_CPointerToObjCPointerCast;
3445
13
        } else {
3446
13
          CK = CK_BitCast;
3447
13
        }
3448
15
      } else {
3449
15
        CK = CK_BitCast;
3450
15
      }
3451
28
3452
28
      userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
3453
28
    }
3454
26
    // Make id<P...> cast into an 'id' cast.
3455
26
    else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
3456
3
      if (CE->getType()->isObjCQualifiedIdType()) {
3457
0
        while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
3458
0
          userExpr = CE->getSubExpr();
3459
0
        CastKind CK;
3460
0
        if (userExpr->getType()->isIntegralType(*Context)) {
3461
0
          CK = CK_IntegralToPointer;
3462
0
        } else if (userExpr->getType()->isBlockPointerType()) {
3463
0
          CK = CK_BlockPointerToObjCPointerCast;
3464
0
        } else if (userExpr->getType()->isPointerType()) {
3465
0
          CK = CK_CPointerToObjCPointerCast;
3466
0
        } else {
3467
0
          CK = CK_BitCast;
3468
0
        }
3469
0
        userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3470
0
                                            CK, userExpr);
3471
0
      }
3472
3
    }
3473
54
    MsgExprs.push_back(userExpr);
3474
54
    // We've transferred the ownership to MsgExprs. For now, we *don't* null
3475
54
    // out the argument in the original expression (since we aren't deleting
3476
54
    // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3477
54
    //Exp->setArg(i, 0);
3478
54
  }
3479
104
  // Generate the funky cast.
3480
104
  CastExpr *cast;
3481
104
  SmallVector<QualType, 8> ArgTypes;
3482
104
  QualType returnType;
3483
104
3484
104
  // Push 'id' and 'SEL', the 2 implicit arguments.
3485
104
  if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3486
1
    ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
3487
103
  else
3488
103
    ArgTypes.push_back(Context->getObjCIdType());
3489
104
  ArgTypes.push_back(Context->getObjCSelType());
3490
104
  if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3491
98
    // Push any user argument types.
3492
98
    for (const auto *PI : OMD->parameters()) {
3493
44
      QualType t = PI->getType()->isObjCQualifiedIdType()
3494
44
                     ? 
Context->getObjCIdType()0
3495
44
                     : PI->getType();
3496
44
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
3497
44
      (void)convertBlockPointerToFunctionPointer(t);
3498
44
      ArgTypes.push_back(t);
3499
44
    }
3500
98
    returnType = Exp->getType();
3501
98
    convertToUnqualifiedObjCType(returnType);
3502
98
    (void)convertBlockPointerToFunctionPointer(returnType);
3503
98
  } else {
3504
6
    returnType = Context->getObjCIdType();
3505
6
  }
3506
104
  // Get the type, we will need to reference it in a couple spots.
3507
104
  QualType msgSendType = MsgSendFlavor->getType();
3508
104
3509
104
  // Create a reference to the objc_msgSend() declaration.
3510
104
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
3511
104
      *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
3512
104
3513
104
  // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3514
104
  // If we don't do this cast, we get the following bizarre warning/note:
3515
104
  // xx.m:13: warning: function called through a non-compatible type
3516
104
  // xx.m:13: note: if this code is reached, the program will abort
3517
104
  cast = NoTypeInfoCStyleCastExpr(Context,
3518
104
                                  Context->getPointerType(Context->VoidTy),
3519
104
                                  CK_BitCast, DRE);
3520
104
3521
104
  // Now do the "normal" pointer to function cast.
3522
104
  // If we don't have a method decl, force a variadic cast.
3523
104
  const ObjCMethodDecl *MD = Exp->getMethodDecl();
3524
104
  QualType castType =
3525
104
    getSimpleFunctionType(returnType, ArgTypes, MD ? 
MD->isVariadic()98
:
true6
);
3526
104
  castType = Context->getPointerType(castType);
3527
104
  cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3528
104
                                  cast);
3529
104
3530
104
  // Don't forget the parens to enforce the proper binding.
3531
104
  ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3532
104
3533
104
  const FunctionType *FT = msgSendType->getAs<FunctionType>();
3534
104
  CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
3535
104
                                  VK_RValue, EndLoc);
3536
104
  Stmt *ReplacingStmt = CE;
3537
104
  if (MsgSendStretFlavor) {
3538
12
    // We have the method which returns a struct/union. Must also generate
3539
12
    // call to objc_msgSend_stret and hang both varieties on a conditional
3540
12
    // expression which dictate which one to envoke depending on size of
3541
12
    // method's return type.
3542
12
3543
12
    Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3544
12
                                           returnType,
3545
12
                                           ArgTypes, MsgExprs,
3546
12
                                           Exp->getMethodDecl());
3547
12
    ReplacingStmt = STCE;
3548
12
  }
3549
104
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3550
104
  return ReplacingStmt;
3551
104
}
3552
3553
71
Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3554
71
  Stmt *ReplacingStmt =
3555
71
      SynthMessageExpr(Exp, Exp->getBeginLoc(), Exp->getEndLoc());
3556
71
3557
71
  // Now do the actual rewrite.
3558
71
  ReplaceStmt(Exp, ReplacingStmt);
3559
71
3560
71
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3561
71
  return ReplacingStmt;
3562
71
}
3563
3564
// typedef struct objc_object Protocol;
3565
4
QualType RewriteModernObjC::getProtocolType() {
3566
4
  if (!ProtocolTypeDecl) {
3567
1
    TypeSourceInfo *TInfo
3568
1
      = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3569
1
    ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3570
1
                                           SourceLocation(), SourceLocation(),
3571
1
                                           &Context->Idents.get("Protocol"),
3572
1
                                           TInfo);
3573
1
  }
3574
4
  return Context->getTypeDeclType(ProtocolTypeDecl);
3575
4
}
3576
3577
/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3578
/// a synthesized/forward data reference (to the protocol's metadata).
3579
/// The forward references (and metadata) are generated in
3580
/// RewriteModernObjC::HandleTranslationUnit().
3581
2
Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3582
2
  std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3583
2
                      Exp->getProtocol()->getNameAsString();
3584
2
  IdentifierInfo *ID = &Context->Idents.get(Name);
3585
2
  VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3586
2
                                SourceLocation(), ID, getProtocolType(),
3587
2
                                nullptr, SC_Extern);
3588
2
  DeclRefExpr *DRE = new (Context) DeclRefExpr(
3589
2
      *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3590
2
  CastExpr *castExpr = NoTypeInfoCStyleCastExpr(
3591
2
      Context, Context->getPointerType(DRE->getType()), CK_BitCast, DRE);
3592
2
  ReplaceStmt(Exp, castExpr);
3593
2
  ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3594
2
  // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3595
2
  return castExpr;
3596
2
}
3597
3598
/// IsTagDefinedInsideClass - This routine checks that a named tagged type
3599
/// is defined inside an objective-c class. If so, it returns true.
3600
bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3601
                                                TagDecl *Tag,
3602
39
                                                bool &IsNamedDefinition) {
3603
39
  if (!IDecl)
3604
0
    return false;
3605
39
  SourceLocation TagLocation;
3606
39
  if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) {
3607
31
    RD = RD->getDefinition();
3608
31
    if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3609
16
      return false;
3610
15
    IsNamedDefinition = true;
3611
15
    TagLocation = RD->getLocation();
3612
15
    return Context->getSourceManager().isBeforeInTranslationUnit(
3613
15
                                          IDecl->getLocation(), TagLocation);
3614
15
  }
3615
8
  if (EnumDecl *ED = dyn_cast<EnumDecl>(Tag)) {
3616
8
    if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3617
4
      return false;
3618
4
    IsNamedDefinition = true;
3619
4
    TagLocation = ED->getLocation();
3620
4
    return Context->getSourceManager().isBeforeInTranslationUnit(
3621
4
                                          IDecl->getLocation(), TagLocation);
3622
4
  }
3623
0
  return false;
3624
0
}
3625
3626
/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3627
/// It handles elaborated types, as well as enum types in the process.
3628
bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3629
297
                                                 std::string &Result) {
3630
297
  if (isa<TypedefType>(Type)) {
3631
44
    Result += "\t";
3632
44
    return false;
3633
44
  }
3634
253
3635
253
  if (Type->isArrayType()) {
3636
2
    QualType ElemTy = Context->getBaseElementType(Type);
3637
2
    return RewriteObjCFieldDeclType(ElemTy, Result);
3638
2
  }
3639
251
  else if (Type->isRecordType()) {
3640
68
    RecordDecl *RD = Type->getAs<RecordType>()->getDecl();
3641
68
    if (RD->isCompleteDefinition()) {
3642
68
      if (RD->isStruct())
3643
61
        Result += "\n\tstruct ";
3644
7
      else if (RD->isUnion())
3645
7
        Result += "\n\tunion ";
3646
7
      else
3647
7
        assert(false && "class not allowed as an ivar type");
3648
68
3649
68
      Result += RD->getName();
3650
68
      if (GlobalDefinedTags.count(RD)) {
3651
27
        // struct/union is defined globally, use it.
3652
27
        Result += " ";
3653
27
        return true;
3654
27
      }
3655
41
      Result += " {\n";
3656
41
      for (auto *FD : RD->fields())
3657
102
        RewriteObjCFieldDecl(FD, Result);
3658
41
      Result += "\t} ";
3659
41
      return true;
3660
41
    }
3661
183
  }
3662
183
  else if (Type->isEnumeralType()) {
3663
16
    EnumDecl *ED = Type->getAs<EnumType>()->getDecl();
3664
16
    if (ED->isCompleteDefinition()) {
3665
16
      Result += "\n\tenum ";
3666
16
      Result += ED->getName();
3667
16
      if (GlobalDefinedTags.count(ED)) {
3668
9
        // Enum is globall defined, use it.
3669
9
        Result += " ";
3670
9
        return true;
3671
9
      }
3672
7
3673
7
      Result += " {\n";
3674
13
      for (const auto *EC : ED->enumerators()) {
3675
13
        Result += "\t"; Result += EC->getName(); Result += " = ";
3676
13
        llvm::APSInt Val = EC->getInitVal();
3677
13
        Result += Val.toString(10);
3678
13
        Result += ",\n";
3679
13
      }
3680
7
      Result += "\t} ";
3681
7
      return true;
3682
7
    }
3683
16
  }
3684
167
3685
167
  Result += "\t";
3686
167
  convertObjCTypeToCStyleType(Type);
3687
167
  return false;
3688
167
}
3689
3690
3691
/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3692
/// It handles elaborated types, as well as enum types in the process.
3693
void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3694
269
                                             std::string &Result) {
3695
269
  QualType Type = fieldDecl->getType();
3696
269
  std::string Name = fieldDecl->getNameAsString();
3697
269
3698
269
  bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3699
269
  if (!EleboratedType)
3700
211
    Type.getAsStringInternal(Name, Context->getPrintingPolicy());
3701
269
  Result += Name;
3702
269
  if (fieldDecl->isBitField()) {
3703
64
    Result += " : "; Result += utostr(fieldDecl->getBitWidthValue(*Context));
3704
64
  }
3705
205
  else if (EleboratedType && 
Type->isArrayType()58
) {
3706
1
    const ArrayType *AT = Context->getAsArrayType(Type);
3707
2
    do {
3708
2
      if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
3709
2
        Result += "[";
3710
2
        llvm::APInt Dim = CAT->getSize();
3711
2
        Result += utostr(Dim.getZExtValue());
3712
2
        Result += "]";
3713
2
      }
3714
2
      AT = Context->getAsArrayType(AT->getElementType());
3715
2
    } while (AT);
3716
1
  }
3717
269
3718
269
  Result += ";\n";
3719
269
}
3720
3721
/// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3722
/// named aggregate types into the input buffer.
3723
void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3724
213
                                             std::string &Result) {
3725
213
  QualType Type = fieldDecl->getType();
3726
213
  if (isa<TypedefType>(Type))
3727
42
    return;
3728
171
  if (Type->isArrayType())
3729
2
    Type = Context->getBaseElementType(Type);
3730
171
  ObjCContainerDecl *IDecl =
3731
171
    dyn_cast<ObjCContainerDecl>(fieldDecl->getDeclContext());
3732
171
3733
171
  TagDecl *TD = nullptr;
3734
171
  if (Type->isRecordType()) {
3735
43
    TD = Type->getAs<RecordType>()->getDecl();
3736
43
  }
3737
128
  else if (Type->isEnumeralType()) {
3738
13
    TD = Type->getAs<EnumType>()->getDecl();
3739
13
  }
3740
171
3741
171
  if (TD) {
3742
56
    if (GlobalDefinedTags.count(TD))
3743
17
      return;
3744
39
3745
39
    bool IsNamedDefinition = false;
3746
39
    if (IsTagDefinedInsideClass(IDecl, TD, IsNamedDefinition)) {
3747
14
      RewriteObjCFieldDeclType(Type, Result);
3748
14
      Result += ";";
3749
14
    }
3750
39
    if (IsNamedDefinition)
3751
19
      GlobalDefinedTags.insert(TD);
3752
39
  }
3753
171
}
3754
3755
171
unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3756
171
  const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3757
171
  if (ObjCInterefaceHasBitfieldGroups.count(CDecl)) {
3758
160
    return IvarGroupNumber[IV];
3759
160
  }
3760
11
  unsigned GroupNo = 0;
3761
11
  SmallVector<const ObjCIvarDecl *, 8> IVars;
3762
11
  for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3763
90
       IVD; 
IVD = IVD->getNextIvar()79
)
3764
79
    IVars.push_back(IVD);
3765
11
3766
56
  for (unsigned i = 0, e = IVars.size(); i < e; 
i++45
)
3767
45
    if (IVars[i]->isBitField()) {
3768
12
      IvarGroupNumber[IVars[i++]] = ++GroupNo;
3769
46
      while (i < e && 
IVars[i]->isBitField()39
)
3770
34
        IvarGroupNumber[IVars[i++]] = GroupNo;
3771
12
      if (i < e)
3772
5
        --i;
3773
12
    }
3774
11
3775
11
  ObjCInterefaceHasBitfieldGroups.insert(CDecl);
3776
11
  return IvarGroupNumber[IV];
3777
11
}
3778
3779
QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3780
                              ObjCIvarDecl *IV,
3781
12
                              SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3782
12
  std::string StructTagName;
3783
12
  ObjCIvarBitfieldGroupType(IV, StructTagName);
3784
12
  RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct,
3785
12
                                      Context->getTranslationUnitDecl(),
3786
12
                                      SourceLocation(), SourceLocation(),
3787
12
                                      &Context->Idents.get(StructTagName));
3788
58
  for (unsigned i=0, e = IVars.size(); i < e; 
i++46
) {
3789
46
    ObjCIvarDecl *Ivar = IVars[i];
3790
46
    RD->addDecl(FieldDecl::Create(*Context, RD, SourceLocation(), SourceLocation(),
3791
46
                                  &Context->Idents.get(Ivar->getName()),
3792
46
                                  Ivar->getType(),
3793
46
                                  nullptr, /*Expr *BW */Ivar->getBitWidth(),
3794
46
                                  false, ICIS_NoInit));
3795
46
  }
3796
12
  RD->completeDefinition();
3797
12
  return Context->getTagDeclType(RD);
3798
12
}
3799
3800
42
QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3801
42
  const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3802
42
  unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3803
42
  std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(CDecl, GroupNo);
3804
42
  if (GroupRecordType.count(tuple))
3805
31
    return GroupRecordType[tuple];
3806
11
3807
11
  SmallVector<ObjCIvarDecl *, 8> IVars;
3808
11
  for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3809
90
       IVD; 
IVD = IVD->getNextIvar()79
) {
3810
79
    if (IVD->isBitField())
3811
46
      IVars.push_back(const_cast<ObjCIvarDecl *>(IVD));
3812
33
    else {
3813
33
      if (!IVars.empty()) {
3814
5
        unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3815
5
        // Generate the struct type for this group of bitfield ivars.
3816
5
        GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3817
5
          SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3818
5
        IVars.clear();
3819
5
      }
3820
33
    }
3821
79
  }
3822
11
  if (!IVars.empty()) {
3823
7
    // Do the last one.
3824
7
    unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3825
7
    GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3826
7
      SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3827
7
  }
3828
11
  QualType RetQT = GroupRecordType[tuple];
3829
11
  assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL");
3830
11
3831
11
  return RetQT;
3832
11
}
3833
3834
/// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
3835
/// Name would be: classname__GRBF_n where n is the group number for this ivar.
3836
void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
3837
82
                                                  std::string &Result) {
3838
82
  const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3839
82
  Result += CDecl->getName();
3840
82
  Result += "__GRBF_";
3841
82
  unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3842
82
  Result += utostr(GroupNo);
3843
82
}
3844
3845
/// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
3846
/// Name of the struct would be: classname__T_n where n is the group number for
3847
/// this ivar.
3848
void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
3849
24
                                                  std::string &Result) {
3850
24
  const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3851
24
  Result += CDecl->getName();
3852
24
  Result += "__T_";
3853
24
  unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3854
24
  Result += utostr(GroupNo);
3855
24
}
3856
3857
/// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
3858
/// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
3859
/// this ivar.
3860
void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
3861
44
                                                    std::string &Result) {
3862
44
  Result += "OBJC_IVAR_$_";
3863
44
  ObjCIvarBitfieldGroupDecl(IV, Result);
3864
44
}
3865
3866
46
#define SKIP_BITFIELDS(IX, ENDIX, VEC) { \
3867
204
      while ((IX < ENDIX) && 
VEC[IX]->isBitField()178
) \
3868
158
        ++IX; \
3869
46
      if (IX < ENDIX) \
3870
46
        
--IX20
; \
3871
46
}
3872
3873
/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3874
/// an objective-c class with ivars.
3875
void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3876
152
                                               std::string &Result) {
3877
152
  assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
3878
152
  assert(CDecl->getName() != "" &&
3879
152
         "Name missing in SynthesizeObjCInternalStruct");
3880
152
  ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3881
152
  SmallVector<ObjCIvarDecl *, 8> IVars;
3882
152
  for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3883
365
       IVD; 
IVD = IVD->getNextIvar()213
)
3884
213
    IVars.push_back(IVD);
3885
152
3886
152
  SourceLocation LocStart = CDecl->getBeginLoc();
3887
152
  SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3888
152
3889
152
  const char *startBuf = SM->getCharacterData(LocStart);
3890
152
  const char *endBuf = SM->getCharacterData(LocEnd);
3891
152
3892
152
  // If no ivars and no root or if its root, directly or indirectly,
3893
152
  // have no ivars (thus not synthesized) then no need to synthesize this class.
3894
152
  if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
3895
152
      
(88
!RCDecl88
||
!ObjCSynthesizedStructs.count(RCDecl)15
)) {
3896
86
    endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3897
86
    ReplaceText(LocStart, endBuf-startBuf, Result);
3898
86
    return;
3899
86
  }
3900
66
3901
66
  // Insert named struct/union definitions inside class to
3902
66
  // outer scope. This follows semantics of locally defined
3903
66
  // struct/unions in objective-c classes.
3904
279
  
for (unsigned i = 0, e = IVars.size(); 66
i < e;
i++213
)
3905
213
    RewriteLocallyDefinedNamedAggregates(IVars[i], Result);
3906
66
3907
66
  // Insert named structs which are syntheized to group ivar bitfields
3908
66
  // to outer scope as well.
3909
245
  for (unsigned i = 0, e = IVars.size(); i < e; 
i++179
)
3910
179
    if (IVars[i]->isBitField()) {
3911
12
      ObjCIvarDecl *IV = IVars[i];
3912
12
      QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
3913
12
      RewriteObjCFieldDeclType(QT, Result);
3914
12
      Result += ";";
3915
12
      // skip over ivar bitfields in this group.
3916
12
      SKIP_BITFIELDS(i , e, IVars);
3917
12
    }
3918
66
3919
66
  Result += "\nstruct ";
3920
66
  Result += CDecl->getNameAsString();
3921
66
  Result += "_IMPL {\n";
3922
66
3923
66
  if (RCDecl && 
ObjCSynthesizedStructs.count(RCDecl)14
) {
3924
9
    Result += "\tstruct "; Result += RCDecl->getNameAsString();
3925
9
    Result += "_IMPL "; Result += RCDecl->getNameAsString();
3926
9
    Result += "_IVARS;\n";
3927
9
  }
3928
66
3929
245
  for (unsigned i = 0, e = IVars.size(); i < e; 
i++179
) {
3930
179
    if (IVars[i]->isBitField()) {
3931
12
      ObjCIvarDecl *IV = IVars[i];
3932
12
      Result += "\tstruct ";
3933
12
      ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
3934
12
      ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
3935
12
      // skip over ivar bitfields in this group.
3936
12
      SKIP_BITFIELDS(i , e, IVars);
3937
12
    }
3938
167
    else
3939
167
      RewriteObjCFieldDecl(IVars[i], Result);
3940
179
  }
3941
66
3942
66
  Result += "};\n";
3943
66
  endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3944
66
  ReplaceText(LocStart, endBuf-startBuf, Result);
3945
66
  // Mark this struct as having been generated.
3946
66
  if (!ObjCSynthesizedStructs.insert(CDecl).second)
3947
66
    
llvm_unreachable0
("struct already synthesize- RewriteObjCInternalStruct");
3948
66
}
3949
3950
/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
3951
/// have been referenced in an ivar access expression.
3952
void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
3953
152
                                                  std::string &Result) {
3954
152
  // write out ivar offset symbols which have been referenced in an ivar
3955
152
  // access expression.
3956
152
  llvm::SmallSetVector<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
3957
152
3958
152
  if (Ivars.empty())
3959
109
    return;
3960
43
3961
43
  llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
3962
85
  for (ObjCIvarDecl *IvarDecl : Ivars) {
3963
85
    const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
3964
85
    unsigned GroupNo = 0;
3965
85
    if (IvarDecl->isBitField()) {
3966
11
      GroupNo = ObjCIvarBitfieldGroupNo(IvarDecl);
3967
11
      if (GroupSymbolOutput.count(std::make_pair(IDecl, GroupNo)))
3968
8
        continue;
3969
77
    }
3970
77
    Result += "\n";
3971
77
    if (LangOpts.MicrosoftExt)
3972
77
      Result += "__declspec(allocate(\".objc_ivar$B\")) ";
3973
77
    Result += "extern \"C\" ";
3974
77
    if (LangOpts.MicrosoftExt &&
3975
77
        IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
3976
77
        
IvarDecl->getAccessControl() != ObjCIvarDecl::Package50
)
3977
50
        Result += "__declspec(dllimport) ";
3978
77
3979
77
    Result += "unsigned long ";
3980
77
    if (IvarDecl->isBitField()) {
3981
3
      ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
3982
3
      GroupSymbolOutput.insert(std::make_pair(IDecl, GroupNo));
3983
3
    }
3984
74
    else
3985
74
      WriteInternalIvarName(CDecl, IvarDecl, Result);
3986
77
    Result += ";";
3987
77
  }
3988
43
}
3989
3990
//===----------------------------------------------------------------------===//
3991
// Meta Data Emission
3992
//===----------------------------------------------------------------------===//
3993
3994
/// RewriteImplementations - This routine rewrites all method implementations
3995
/// and emits meta-data.
3996
3997
52
void RewriteModernObjC::RewriteImplementations() {
3998
52
  int ClsDefCount = ClassImplementation.size();
3999
52
  int CatDefCount = CategoryImplementation.size();
4000
52
4001
52
  // Rewrite implemented methods
4002
140
  for (int i = 0; i < ClsDefCount; 
i++88
) {
4003
88
    ObjCImplementationDecl *OIMP = ClassImplementation[i];
4004
88
    ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4005
88
    if (CDecl->isImplicitInterfaceDecl())
4006
88
      assert(false &&
4007
88
             "Legacy implicit interface rewriting not supported in moder abi");
4008
88
    RewriteImplementationDecl(OIMP);
4009
88
  }
4010
52
4011
57
  for (int i = 0; i < CatDefCount; 
i++5
) {
4012
5
    ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4013
5
    ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4014
5
    if (CDecl->isImplicitInterfaceDecl())
4015
5
      assert(false &&
4016
5
             "Legacy implicit interface rewriting not supported in moder abi");
4017
5
    RewriteImplementationDecl(CIMP);
4018
5
  }
4019
52
}
4020
4021
void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4022
                                     const std::string &Name,
4023
291
                                     ValueDecl *VD, bool def) {
4024
291
  assert(BlockByRefDeclNo.count(VD) &&
4025
291
         "RewriteByRefString: ByRef decl missing");
4026
291
  if (def)
4027
83
    ResultStr += "struct ";
4028
291
  ResultStr += "__Block_byref_" + Name +
4029
291
    "_" + utostr(BlockByRefDeclNo[VD]) ;
4030
291
}
4031
4032
907
static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4033
907
  if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4034
436
    return (Var->isFunctionOrMethodVarDecl() && 
!Var->hasLocalStorage()176
);
4035
471
  return false;
4036
471
}
4037
4038
std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4039
                                                   StringRef funcName,
4040
80
                                                   std::string Tag) {
4041
80
  const FunctionType *AFT = CE->getFunctionType();
4042
80
  QualType RT = AFT->getReturnType();
4043
80
  std::string StructRef = "struct " + Tag;
4044
80
  SourceLocation BlockLoc = CE->getExprLoc();
4045
80
  std::string S;
4046
80
  ConvertSourceLocationToLineDirective(BlockLoc, S);
4047
80
4048
80
  S += "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
4049
80
         funcName.str() + "_block_func_" + utostr(i);
4050
80
4051
80
  BlockDecl *BD = CE->getBlockDecl();
4052
80
4053
80
  if (isa<FunctionNoProtoType>(AFT)) {
4054
0
    // No user-supplied arguments. Still need to pass in a pointer to the
4055
0
    // block (to reference imported block decl refs).
4056
0
    S += "(" + StructRef + " *__cself)";
4057
80
  } else if (BD->param_empty()) {
4058
70
    S += "(" + StructRef + " *__cself)";
4059
70
  } else {
4060
10
    const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
4061
10
    assert(FT && "SynthesizeBlockFunc: No function proto");
4062
10
    S += '(';
4063
10
    // first add the implicit argument.
4064
10
    S += StructRef + " *__cself, ";
4065
10
    std::string ParamStr;
4066
10
    for (BlockDecl::param_iterator AI = BD->param_begin(),
4067
23
         E = BD->param_end(); AI != E; 
++AI13
) {
4068
13
      if (AI != BD->param_begin()) 
S += ", "3
;
4069
13
      ParamStr = (*AI)->getNameAsString();
4070
13
      QualType QT = (*AI)->getType();
4071
13
      (void)convertBlockPointerToFunctionPointer(QT);
4072
13
      QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
4073
13
      S += ParamStr;
4074
13
    }
4075
10
    if (FT->isVariadic()) {
4076
0
      if (!BD->param_empty()) S += ", ";
4077
0
      S += "...";
4078
0
    }
4079
10
    S += ')';
4080
10
  }
4081
80
  S += " {\n";
4082
80
4083
80
  // Create local declarations to avoid rewriting all closure decl ref exprs.
4084
80
  // First, emit a declaration for all "by ref" decls.
4085
80
  for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4086
121
       E = BlockByRefDecls.end(); I != E; 
++I41
) {
4087
41
    S += "  ";
4088
41
    std::string Name = (*I)->getNameAsString();
4089
41
    std::string TypeString;
4090
41
    RewriteByRefString(TypeString, Name, (*I));
4091
41
    TypeString += " *";
4092
41
    Name = TypeString + Name;
4093
41
    S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4094
41
  }
4095
80
  // Next, emit a declaration for all "by copy" declarations.
4096
80
  for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4097
116
       E = BlockByCopyDecls.end(); I != E; 
++I36
) {
4098
36
    S += "  ";
4099
36
    // Handle nested closure invocation. For example:
4100
36
    //
4101
36
    //   void (^myImportedClosure)(void);
4102
36
    //   myImportedClosure  = ^(void) { setGlobalInt(x + y); };
4103
36
    //
4104
36
    //   void (^anotherClosure)(void);
4105
36
    //   anotherClosure = ^(void) {
4106
36
    //     myImportedClosure(); // import and invoke the closure
4107
36
    //   };
4108
36
    //
4109
36
    if (isTopLevelBlockPointerType((*I)->getType())) {
4110
2
      RewriteBlockPointerTypeVariable(S, (*I));
4111
2
      S += " = (";
4112
2
      RewriteBlockPointerType(S, (*I)->getType());
4113
2
      S += ")";
4114
2
      S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4115
2
    }
4116
34
    else {
4117
34
      std::string Name = (*I)->getNameAsString();
4118
34
      QualType QT = (*I)->getType();
4119
34
      if (HasLocalVariableExternalStorage(*I))
4120
0
        QT = Context->getPointerType(QT);
4121
34
      QT.getAsStringInternal(Name, Context->getPrintingPolicy());
4122
34
      S += Name + " = __cself->" +
4123
34
                              (*I)->getNameAsString() + "; // bound by copy\n";
4124
34
    }
4125
36
  }
4126
80
  std::string RewrittenStr = RewrittenBlockExprs[CE];
4127
80
  const char *cstr = RewrittenStr.c_str();
4128
356
  while (*cstr++ != '{') 
;276
4129
80
  S += cstr;
4130
80
  S += "\n";
4131
80
  return S;
4132
80
}
4133
4134
std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4135
                                                   StringRef funcName,
4136
29
                                                   std::string Tag) {
4137
29
  std::string StructRef = "struct " + Tag;
4138
29
  std::string S = "static void __";
4139
29
4140
29
  S += funcName;
4141
29
  S += "_block_copy_" + utostr(i);
4142
29
  S += "(" + StructRef;
4143
29
  S += "*dst, " + StructRef;
4144
29
  S += "*src) {";
4145
44
  for (ValueDecl *VD : ImportedBlockDecls) {
4146
44
    S += "_Block_object_assign((void*)&dst->";
4147
44
    S += VD->getNameAsString();
4148
44
    S += ", (void*)src->";
4149
44
    S += VD->getNameAsString();
4150
44
    if (BlockByRefDeclsPtrSet.count(VD))
4151
28
      S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4152
16
    else if (VD->getType()->isBlockPointerType())
4153
2
      S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4154
14
    else
4155
14
      S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4156
44
  }
4157
29
  S += "}\n";
4158
29
4159
29
  S += "\nstatic void __";
4160
29
  S += funcName;
4161
29
  S += "_block_dispose_" + utostr(i);
4162
29
  S += "(" + StructRef;
4163
29
  S += "*src) {";
4164
44
  for (ValueDecl *VD : ImportedBlockDecls) {
4165
44
    S += "_Block_object_dispose((void*)src->";
4166
44
    S += VD->getNameAsString();
4167
44
    if (BlockByRefDeclsPtrSet.count(VD))
4168
28
      S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4169
16
    else if (VD->getType()->isBlockPointerType())
4170
2
      S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4171
14
    else
4172
14
      S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4173
44
  }
4174
29
  S += "}\n";
4175
29
  return S;
4176
29
}
4177
4178
std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4179
80
                                             std::string Desc) {
4180
80
  std::string S = "\nstruct " + Tag;
4181
80
  std::string Constructor = "  " + Tag;
4182
80
4183
80
  S += " {\n  struct __block_impl impl;\n";
4184
80
  S += "  struct " + Desc;
4185
80
  S += "* Desc;\n";
4186
80
4187
80
  Constructor += "(void *fp, "; // Invoke function pointer.
4188
80
  Constructor += "struct " + Desc; // Descriptor pointer.
4189
80
  Constructor += " *desc";
4190
80
4191
80
  if (BlockDeclRefs.size()) {
4192
43
    // Output all "by copy" declarations.
4193
43
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4194
79
         E = BlockByCopyDecls.end(); I != E; 
++I36
) {
4195
36
      S += "  ";
4196
36
      std::string FieldName = (*I)->getNameAsString();
4197
36
      std::string ArgName = "_" + FieldName;
4198
36
      // Handle nested closure invocation. For example:
4199
36
      //
4200
36
      //   void (^myImportedBlock)(void);
4201
36
      //   myImportedBlock  = ^(void) { setGlobalInt(x + y); };
4202
36
      //
4203
36
      //   void (^anotherBlock)(void);
4204
36
      //   anotherBlock = ^(void) {
4205
36
      //     myImportedBlock(); // import and invoke the closure
4206
36
      //   };
4207
36
      //
4208
36
      if (isTopLevelBlockPointerType((*I)->getType())) {
4209
2
        S += "struct __block_impl *";
4210
2
        Constructor += ", void *" + ArgName;
4211
34
      } else {
4212
34
        QualType QT = (*I)->getType();
4213
34
        if (HasLocalVariableExternalStorage(*I))
4214
0
          QT = Context->getPointerType(QT);
4215
34
        QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
4216
34
        QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
4217
34
        Constructor += ", " + ArgName;
4218
34
      }
4219
36
      S += FieldName + ";\n";
4220
36
    }
4221
43
    // Output all "by ref" declarations.
4222
43
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4223
84
         E = BlockByRefDecls.end(); I != E; 
++I41
) {
4224
41
      S += "  ";
4225
41
      std::string FieldName = (*I)->getNameAsString();
4226
41
      std::string ArgName = "_" + FieldName;
4227
41
      {
4228
41
        std::string TypeString;
4229
41
        RewriteByRefString(TypeString, FieldName, (*I));
4230
41
        TypeString += " *";
4231
41
        FieldName = TypeString + FieldName;
4232
41
        ArgName = TypeString + ArgName;
4233
41
        Constructor += ", " + ArgName;
4234
41
      }
4235
41
      S += FieldName + "; // by ref\n";
4236
41
    }
4237
43
    // Finish writing the constructor.
4238
43
    Constructor += ", int flags=0)";
4239
43
    // Initialize all "by copy" arguments.
4240
43
    bool firsTime = true;
4241
43
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4242
79
         E = BlockByCopyDecls.end(); I != E; 
++I36
) {
4243
36
      std::string Name = (*I)->getNameAsString();
4244
36
        if (firsTime) {
4245
24
          Constructor += " : ";
4246
24
          firsTime = false;
4247
24
        }
4248
12
        else
4249
12
          Constructor += ", ";
4250
36
        if (isTopLevelBlockPointerType((*I)->getType()))
4251
2
          Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4252
34
        else
4253
34
          Constructor += Name + "(_" + Name + ")";
4254
36
    }
4255
43
    // Initialize all "by ref" arguments.
4256
43
    for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4257
84
         E = BlockByRefDecls.end(); I != E; 
++I41
) {
4258
41
      std::string Name = (*I)->getNameAsString();
4259
41
      if (firsTime) {
4260
19
        Constructor += " : ";
4261
19
        firsTime = false;
4262
19
      }
4263
22
      else
4264
22
        Constructor += ", ";
4265
41
      Constructor += Name + "(_" + Name + "->__forwarding)";
4266
41
    }
4267
43
4268
43
    Constructor += " {\n";
4269
43
    if (GlobalVarDecl)
4270
0
      Constructor += "    impl.isa = &_NSConcreteGlobalBlock;\n";
4271
43
    else
4272
43
      Constructor += "    impl.isa = &_NSConcreteStackBlock;\n";
4273
43
    Constructor += "    impl.Flags = flags;\n    impl.FuncPtr = fp;\n";
4274
43
4275
43
    Constructor += "    Desc = desc;\n";
4276
43
  } else {
4277
37
    // Finish writing the constructor.
4278
37
    Constructor += ", int flags=0) {\n";
4279
37
    if (GlobalVarDecl)
4280
6
      Constructor += "    impl.isa = &_NSConcreteGlobalBlock;\n";
4281
31
    else
4282
31
      Constructor += "    impl.isa = &_NSConcreteStackBlock;\n";
4283
37
    Constructor += "    impl.Flags = flags;\n    impl.FuncPtr = fp;\n";
4284
37
    Constructor += "    Desc = desc;\n";
4285
37
  }
4286
80
  Constructor += "  ";
4287
80
  Constructor += "}\n";
4288
80
  S += Constructor;
4289
80
  S += "};\n";
4290
80
  return S;
4291
80
}
4292
4293
std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
4294
                                                   std::string ImplTag, int i,
4295
                                                   StringRef FunName,
4296
80
                                                   unsigned hasCopy) {
4297
80
  std::string S = "\nstatic struct " + DescTag;
4298
80
4299
80
  S += " {\n  size_t reserved;\n";
4300
80
  S += "  size_t Block_size;\n";
4301
80
  if (hasCopy) {
4302
29
    S += "  void (*copy)(struct ";
4303
29
    S += ImplTag; S += "*, struct ";
4304
29
    S += ImplTag; S += "*);\n";
4305
29
4306
29
    S += "  void (*dispose)(struct ";
4307
29
    S += ImplTag; S += "*);\n";
4308
29
  }
4309
80
  S += "} ";
4310
80
4311
80
  S += DescTag + "_DATA = { 0, sizeof(struct ";
4312
80
  S += ImplTag + ")";
4313
80
  if (hasCopy) {
4314
29
    S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
4315
29
    S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
4316
29
  }
4317
80
  S += "};\n";
4318
80
  return S;
4319
80
}
4320
4321
void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4322
171
                                          StringRef FunName) {
4323
171
  bool RewriteSC = (GlobalVarDecl &&
4324
171
                    
!Blocks.empty()9
&&
4325
171
                    
GlobalVarDecl->getStorageClass() == SC_Static6
&&
4326
171
                    
GlobalVarDecl->getType().getCVRQualifiers()4
);
4327
171
  if (RewriteSC) {
4328
4
    std::string SC(" void __");
4329
4
    SC += GlobalVarDecl->getNameAsString();
4330
4
    SC += "() {}";
4331
4
    InsertText(FunLocStart, SC);
4332
4
  }
4333
171
4334
171
  // Insert closures that were part of the function.
4335
251
  for (unsigned i = 0, count=0; i < Blocks.size(); 
i++80
) {
4336
80
    CollectBlockDeclRefInfo(Blocks[i]);
4337
80
    // Need to copy-in the inner copied-in variables not actually used in this
4338
80
    // block.
4339
105
    for (int j = 0; j < InnerDeclRefsCount[i]; 
j++25
) {
4340
25
      DeclRefExpr *Exp = InnerDeclRefs[count++];
4341
25
      ValueDecl *VD = Exp->getDecl();
4342
25
      BlockDeclRefs.push_back(Exp);
4343
25
      if (!VD->hasAttr<BlocksAttr>()) {
4344
12
        if (!BlockByCopyDeclsPtrSet.count(VD)) {
4345
12
          BlockByCopyDeclsPtrSet.insert(VD);
4346
12
          BlockByCopyDecls.push_back(VD);
4347
12
        }
4348
12
        continue;
4349
12
      }
4350
13
4351
13
      if (!BlockByRefDeclsPtrSet.count(VD)) {
4352
13
        BlockByRefDeclsPtrSet.insert(VD);
4353
13
        BlockByRefDecls.push_back(VD);
4354
13
      }
4355
13
4356
13
      // imported objects in the inner blocks not used in the outer
4357
13
      // blocks must be copied/disposed in the outer block as well.
4358
13
      if (VD->getType()->isObjCObjectPointerType() ||
4359
13
          VD->getType()->isBlockPointerType())
4360
0
        ImportedBlockDecls.insert(VD);
4361
13
    }
4362
80
4363
80
    std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
4364
80
    std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
4365
80
4366
80
    std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
4367
80
4368
80
    InsertText(FunLocStart, CI);
4369
80
4370
80
    std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
4371
80
4372
80
    InsertText(FunLocStart, CF);
4373
80
4374
80
    if (ImportedBlockDecls.size()) {
4375
29
      std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
4376
29
      InsertText(FunLocStart, HF);
4377
29
    }
4378
80
    std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4379
80
                                               ImportedBlockDecls.size() > 0);
4380
80
    InsertText(FunLocStart, BD);
4381
80
4382
80
    BlockDeclRefs.clear();
4383
80
    BlockByRefDecls.clear();
4384
80
    BlockByRefDeclsPtrSet.clear();
4385
80
    BlockByCopyDecls.clear();
4386
80
    BlockByCopyDeclsPtrSet.clear();
4387
80
    ImportedBlockDecls.clear();
4388
80
  }
4389
171
  if (RewriteSC) {
4390
4
    // Must insert any 'const/volatile/static here. Since it has been
4391
4
    // removed as result of rewriting of block literals.
4392
4
    std::string SC;
4393
4
    if (GlobalVarDecl->getStorageClass() == SC_Static)
4394
4
      SC = "static ";
4395
4
    if (GlobalVarDecl->getType().isConstQualified())
4396
4
      SC += "const ";
4397
4
    if (GlobalVarDecl->getType().isVolatileQualified())
4398
0
      SC += "volatile ";
4399
4
    if (GlobalVarDecl->getType().isRestrictQualified())
4400
0
      SC += "restrict ";
4401
4
    InsertText(FunLocStart, SC);
4402
4
  }
4403
171
  if (GlobalConstructionExp) {
4404
6
    // extra fancy dance for global literal expression.
4405
6
4406
6
    // Always the latest block expression on the block stack.
4407
6
    std::string Tag = "__";
4408
6
    Tag += FunName;
4409
6
    Tag += "_block_impl_";
4410
6
    Tag += utostr(Blocks.size()-1);
4411
6
    std::string globalBuf = "static ";
4412
6
    globalBuf += Tag; globalBuf += " ";
4413
6
    std::string SStr;
4414
6
4415
6
    llvm::raw_string_ostream constructorExprBuf(SStr);
4416
6
    GlobalConstructionExp->printPretty(constructorExprBuf, nullptr,
4417
6
                                       PrintingPolicy(LangOpts));
4418
6
    globalBuf += constructorExprBuf.str();
4419
6
    globalBuf += ";\n";
4420
6
    InsertText(FunLocStart, globalBuf);
4421
6
    GlobalConstructionExp = nullptr;
4422
6
  }
4423
171
4424
171
  Blocks.clear();
4425
171
  InnerDeclRefsCount.clear();
4426
171
  InnerDeclRefs.clear();
4427
171
  RewrittenBlockExprs.clear();
4428
171
}
4429
4430
99
void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4431
99
  SourceLocation FunLocStart =
4432
99
    (!Blocks.empty()) ? 
getFunctionSourceLocation(*this, FD)31
4433
99
                      : 
FD->getTypeSpecStartLoc()68
;
4434
99
  StringRef FuncName = FD->getName();
4435
99
4436
99
  SynthesizeBlockLiterals(FunLocStart, FuncName);
4437
99
}
4438
4439
static void BuildUniqueMethodName(std::string &Name,
4440
84
                                  ObjCMethodDecl *MD) {
4441
84
  ObjCInterfaceDecl *IFace = MD->getClassInterface();
4442
84
  Name = IFace->getName();
4443
84
  Name += "__" + MD->getSelector().getAsString();
4444
84
  // Convert colons to underscores.
4445
84
  std::string::size_type loc = 0;
4446
114
  while ((loc = Name.find(':', loc)) != std::string::npos)
4447
30
    Name.replace(loc, 1, "_");
4448
84
}
4449
4450
63
void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4451
63
  // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4452
63
  // SourceLocation FunLocStart = MD->getBeginLoc();
4453
63
  SourceLocation FunLocStart = MD->getBeginLoc();
4454
63
  std::string FuncName;
4455
63
  BuildUniqueMethodName(FuncName, MD);
4456
63
  SynthesizeBlockLiterals(FunLocStart, FuncName);
4457
63
}
4458
4459
1.91k
void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4460
1.91k
  for (Stmt *SubStmt : S->children())
4461
1.75k
    if (SubStmt) {
4462
1.75k
      if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt))
4463
0
        GetBlockDeclRefExprs(CBE->getBody());
4464
1.75k
      else
4465
1.75k
        GetBlockDeclRefExprs(SubStmt);
4466
1.75k
    }
4467
1.91k
  // Handle specific things.
4468
1.91k
  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
4469
448
    if (DRE->refersToEnclosingVariableOrCapture() ||
4470
448
        
HasLocalVariableExternalStorage(DRE->getDecl())336
)
4471
112
      // FIXME: Handle enums.
4472
112
      BlockDeclRefs.push_back(DRE);
4473
1.91k
}
4474
4475
void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4476
                SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4477
720
                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
4478
720
  for (Stmt *SubStmt : S->children())
4479
640
    if (SubStmt) {
4480
640
      if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt)) {
4481
21
        InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
4482
21
        GetInnerBlockDeclRefExprs(CBE->getBody(),
4483
21
                                  InnerBlockDeclRefs,
4484
21
                                  InnerContexts);
4485
21
      }
4486
619
      else
4487
619
        GetInnerBlockDeclRefExprs(SubStmt, InnerBlockDeclRefs, InnerContexts);
4488
640
    }
4489
720
  // Handle specific things.
4490
720
  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4491
154
    if (DRE->refersToEnclosingVariableOrCapture() ||
4492
154
        
HasLocalVariableExternalStorage(DRE->getDecl())61
) {
4493
93
      if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
4494
88
        InnerBlockDeclRefs.push_back(DRE);
4495
93
      if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
4496
93
        if (Var->isFunctionOrMethodVarDecl())
4497
70
          ImportedLocalExternalDecls.insert(Var);
4498
93
    }
4499
154
  }
4500
720
}
4501
4502
/// convertObjCTypeToCStyleType - This routine converts such objc types
4503
/// as qualified objects, and blocks to their closest c/c++ types that
4504
/// it can. It returns true if input type was modified.
4505
419
bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4506
419
  QualType oldT = T;
4507
419
  convertBlockPointerToFunctionPointer(T);
4508
419
  if (T->isFunctionPointerType()) {
4509
14
    QualType PointeeTy;
4510
14
    if (const PointerType* PT = T->getAs<PointerType>()) {
4511
14
      PointeeTy = PT->getPointeeType();
4512
14
      if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4513
14
        T = convertFunctionTypeOfBlocks(FT);
4514
14
        T = Context->getPointerType(T);
4515
14
      }
4516
14
    }
4517
14
  }
4518
419
4519
419
  convertToUnqualifiedObjCType(T);
4520
419
  return T != oldT;
4521
419
}
4522
4523
/// convertFunctionTypeOfBlocks - This routine converts a function type
4524
/// whose result type may be a block pointer or whose argument type(s)
4525
/// might be block pointers to an equivalent function type replacing
4526
/// all block pointers to function pointers.
4527
94
QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4528
94
  const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4529
94
  // FTP will be null for closures that don't take arguments.
4530
94
  // Generate a funky cast.
4531
94
  SmallVector<QualType, 8> ArgTypes;
4532
94
  QualType Res = FT->getReturnType();
4533
94
  bool modified = convertObjCTypeToCStyleType(Res);
4534
94
4535
94
  if (FTP) {
4536
94
    for (auto &I : FTP->param_types()) {
4537
31
      QualType t = I;
4538
31
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
4539
31
      if (convertObjCTypeToCStyleType(t))
4540
16
        modified = true;
4541
31
      ArgTypes.push_back(t);
4542
31
    }
4543
94
  }
4544
94
  QualType FuncType;
4545
94
  if (modified)
4546
12
    FuncType = getSimpleFunctionType(Res, ArgTypes);
4547
82
  else FuncType = QualType(FT, 0);
4548
94
  return FuncType;
4549
94
}
4550
4551
14
Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4552
14
  // Navigate to relevant type information.
4553
14
  const BlockPointerType *CPT = nullptr;
4554
14
4555
14
  if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
4556
0
    CPT = DRE->getType()->getAs<BlockPointerType>();
4557
14
  } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
4558
0
    CPT = MExpr->getType()->getAs<BlockPointerType>();
4559
0
  }
4560
14
  else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
4561
0
    return SynthesizeBlockCall(Exp, PRE->getSubExpr());
4562
0
  }
4563
14
  else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
4564
14
    CPT = IEXPR->getType()->getAs<BlockPointerType>();
4565
0
  else if (const ConditionalOperator *CEXPR =
4566
0
            dyn_cast<ConditionalOperator>(BlockExp)) {
4567
0
    Expr *LHSExp = CEXPR->getLHS();
4568
0
    Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
4569
0
    Expr *RHSExp = CEXPR->getRHS();
4570
0
    Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
4571
0
    Expr *CONDExp = CEXPR->getCond();
4572
0
    ConditionalOperator *CondExpr =
4573
0
      new (Context) ConditionalOperator(CONDExp,
4574
0
                                      SourceLocation(), cast<Expr>(LHSStmt),
4575
0
                                      SourceLocation(), cast<Expr>(RHSStmt),
4576
0
                                      Exp->getType(), VK_RValue, OK_Ordinary);
4577
0
    return CondExpr;
4578
0
  } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
4579
0
    CPT = IRE->getType()->getAs<BlockPointerType>();
4580
0
  } else if (const PseudoObjectExpr *POE
4581
0
               = dyn_cast<PseudoObjectExpr>(BlockExp)) {
4582
0
    CPT = POE->getType()->castAs<BlockPointerType>();
4583
0
  } else {
4584
0
    assert(false && "RewriteBlockClass: Bad type");
4585
0
  }
4586
14
  assert(CPT && "RewriteBlockClass: Bad type");
4587
14
  const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4588
14
  assert(FT && "RewriteBlockClass: Bad type");
4589
14
  const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4590
14
  // FTP will be null for closures that don't take arguments.
4591
14
4592
14
  RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4593
14
                                      SourceLocation(), SourceLocation(),
4594
14
                                      &Context->Idents.get("__block_impl"));
4595
14
  QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
4596
14
4597
14
  // Generate a funky cast.
4598
14
  SmallVector<QualType, 8> ArgTypes;
4599
14
4600
14
  // Push the block argument type.
4601
14
  ArgTypes.push_back(PtrBlock);
4602
14
  if (FTP) {
4603
14
    for (auto &I : FTP->param_types()) {
4604
8
      QualType t = I;
4605
8
      // Make sure we convert "t (^)(...)" to "t (*)(...)".
4606
8
      if (!convertBlockPointerToFunctionPointer(t))
4607
8
        convertToUnqualifiedObjCType(t);
4608
8
      ArgTypes.push_back(t);
4609
8
    }
4610
14
  }
4611
14
  // Now do the pointer to function cast.
4612
14
  QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
4613
14
4614
14
  PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
4615
14
4616
14
  CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
4617
14
                                               CK_BitCast,
4618
14
                                               const_cast<Expr*>(BlockExp));
4619
14
  // Don't forget the parens to enforce the proper binding.
4620
14
  ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4621
14
                                          BlkCast);
4622
14
  //PE->dump();
4623
14
4624
14
  FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4625
14
                                    SourceLocation(),
4626
14
                                    &Context->Idents.get("FuncPtr"),
4627
14
                                    Context->VoidPtrTy, nullptr,
4628
14
                                    /*BitWidth=*/nullptr, /*Mutable=*/true,
4629
14
                                    ICIS_NoInit);
4630
14
  MemberExpr *ME = MemberExpr::CreateImplicit(
4631
14
      *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
4632
14
4633
14
  CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4634
14
                                                CK_BitCast, ME);
4635
14
  PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4636
14
4637
14
  SmallVector<Expr*, 8> BlkExprs;
4638
14
  // Add the implicit argument.
4639
14
  BlkExprs.push_back(BlkCast);
4640
14
  // Add the user arguments.
4641
14
  for (CallExpr::arg_iterator I = Exp->arg_begin(),
4642
22
       E = Exp->arg_end(); I != E; 
++I8
) {
4643
8
    BlkExprs.push_back(*I);
4644
8
  }
4645
14
  CallExpr *CE = CallExpr::Create(*Context, PE, BlkExprs, Exp->getType(),
4646
14
                                  VK_RValue, SourceLocation());
4647
14
  return CE;
4648
14
}
4649
4650
// We need to return the rewritten expression to handle cases where the
4651
// DeclRefExpr is embedded in another expression being rewritten.
4652
// For example:
4653
//
4654
// int main() {
4655
//    __block Foo *f;
4656
//    __block int i;
4657
//
4658
//    void (^myblock)() = ^() {
4659
//        [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4660
//        i = 77;
4661
//    };
4662
//}
4663
36
Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4664
36
  // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4665
36
  // for each DeclRefExp where BYREFVAR is name of the variable.
4666
36
  ValueDecl *VD = DeclRefExp->getDecl();
4667
36
  bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
4668
36
                 
HasLocalVariableExternalStorage(DeclRefExp->getDecl())8
;
4669
36
4670
36
  FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4671
36
                                    SourceLocation(),
4672
36
                                    &Context->Idents.get("__forwarding"),
4673
36
                                    Context->VoidPtrTy, nullptr,
4674
36
                                    /*BitWidth=*/nullptr, /*Mutable=*/true,
4675
36
                                    ICIS_NoInit);
4676
36
  MemberExpr *ME = MemberExpr::CreateImplicit(
4677
36
      *Context, DeclRefExp, isArrow, FD, FD->getType(), VK_LValue, OK_Ordinary);
4678
36
4679
36
  StringRef Name = VD->getName();
4680
36
  FD = FieldDecl::Create(*Context, nullptr, SourceLocation(), SourceLocation(),
4681
36
                         &Context->Idents.get(Name),
4682
36
                         Context->VoidPtrTy, nullptr,
4683
36
                         /*BitWidth=*/nullptr, /*Mutable=*/true,
4684
36
                         ICIS_NoInit);
4685
36
  ME = MemberExpr::CreateImplicit(*Context, ME, true, FD, DeclRefExp->getType(),
4686
36
                                  VK_LValue, OK_Ordinary);
4687
36
4688
36
  // Need parens to enforce precedence.
4689
36
  ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4690
36
                                          DeclRefExp->getExprLoc(),
4691
36
                                          ME);
4692
36
  ReplaceStmt(DeclRefExp, PE);
4693
36
  return PE;
4694
36
}
4695
4696
// Rewrites the imported local variable V with external storage
4697
// (static, extern, etc.) as *V
4698
//
4699
0
Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4700
0
  ValueDecl *VD = DRE->getDecl();
4701
0
  if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4702
0
    if (!ImportedLocalExternalDecls.count(Var))
4703
0
      return DRE;
4704
0
  Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
4705
0
                                          VK_LValue, OK_Ordinary,
4706
0
                                          DRE->getLocation(), false);
4707
0
  // Need parens to enforce precedence.
4708
0
  ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4709
0
                                          Exp);
4710
0
  ReplaceStmt(DRE, PE);
4711
0
  return PE;
4712
0
}
4713
4714
30
void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4715
30
  SourceLocation LocStart = CE->getLParenLoc();
4716
30
  SourceLocation LocEnd = CE->getRParenLoc();
4717
30
4718
30
  // Need to avoid trying to rewrite synthesized casts.
4719
30
  if (LocStart.isInvalid())
4720
0
    return;
4721
30
  // Need to avoid trying to rewrite casts contained in macros.
4722
30
  if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
4723
0
    return;
4724
30
4725
30
  const char *startBuf = SM->getCharacterData(LocStart);
4726
30
  const char *endBuf = SM->getCharacterData(LocEnd);
4727
30
  QualType QT = CE->getType();
4728
30
  const Type* TypePtr = QT->getAs<Type>();
4729
30
  if (isa<TypeOfExprType>(TypePtr)) {
4730
4
    const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
4731
4
    QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4732
4
    std::string TypeAsString = "(";
4733
4
    RewriteBlockPointerType(TypeAsString, QT);
4734
4
    TypeAsString += ")";
4735
4
    ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
4736
4
    return;
4737
4
  }
4738
26
  // advance the location to startArgList.
4739
26
  const char *argPtr = startBuf;
4740
26
4741
221
  while (*argPtr++ && (argPtr < endBuf)) {
4742
195
    switch (*argPtr) {
4743
195
    case '^':
4744
0
      // Replace the '^' with '*'.
4745
0
      LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
4746
0
      ReplaceText(LocStart, 1, "*");
4747
0
      break;
4748
195
    }
4749
195
  }
4750
26
}
4751
4752
604
void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4753
604
  CastKind CastKind = IC->getCastKind();
4754
604
  if (CastKind != CK_BlockPointerToObjCPointerCast &&
4755
604
      
CastKind != CK_AnyPointerToBlockPointerCast599
)
4756
595
    return;
4757
9
4758
9
  QualType QT = IC->getType();
4759
9
  (void)convertBlockPointerToFunctionPointer(QT);
4760
9
  std::string TypeString(QT.getAsString(Context->getPrintingPolicy()));
4761
9
  std::string Str = "(";
4762
9
  Str += TypeString;
4763
9
  Str += ")";
4764
9
  InsertText(IC->getSubExpr()->getBeginLoc(), Str);
4765
9
}
4766
4767
26
void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4768
26
  SourceLocation DeclLoc = FD->getLocation();
4769
26
  unsigned parenCount = 0;
4770
26
4771
26
  // We have 1 or more arguments that have closure pointers.
4772
26
  const char *startBuf = SM->getCharacterData(DeclLoc);
4773
26
  const char *startArgList = strchr(startBuf, '(');
4774
26
4775
26
  assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
4776
26
4777
26
  parenCount++;
4778
26
  // advance the location to startArgList.
4779
26
  DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
4780
26
  assert((DeclLoc.isValid()) && "Invalid DeclLoc");
4781
26
4782
26
  const char *argPtr = startArgList;
4783
26
4784
488
  while (*argPtr++ && parenCount) {
4785
462
    switch (*argPtr) {
4786
462
    case '^':
4787
26
      // Replace the '^' with '*'.
4788
26
      DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
4789
26
      ReplaceText(DeclLoc, 1, "*");
4790
26
      break;
4791
462
    case '(':
4792
52
      parenCount++;
4793
52
      break;
4794
462
    case ')':
4795
78
      parenCount--;
4796
78
      break;
4797
462
    }
4798
462
  }
4799
26
}
4800
4801
50
bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4802
50
  const FunctionProtoType *FTP;
4803
50
  const PointerType *PT = QT->getAs<PointerType>();
4804
50
  if (PT) {
4805
2
    FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4806
48
  } else {
4807
48
    const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4808
48
    assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4809
48
    FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4810
48
  }
4811
50
  if (FTP) {
4812
50
    for (const auto &I : FTP->param_types())
4813
29
      if (isTopLevelBlockPointerType(I))
4814
3
        return true;
4815
50
  }
4816
50
  
return false47
;
4817
50
}
4818
4819
45
bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
4820
45
  const FunctionProtoType *FTP;
4821
45
  const PointerType *PT = QT->getAs<PointerType>();
4822
45
  if (PT) {
4823
0
    FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4824
45
  } else {
4825
45
    const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4826
45
    assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4827
45
    FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4828
45
  }
4829
45
  if (FTP) {
4830
45
    for (const auto &I : FTP->param_types()) {
4831
15
      if (I->isObjCQualifiedIdType())
4832
5
        return true;
4833
10
      if (I->isObjCObjectPointerType() &&
4834
10
          
I->getPointeeType()->isObjCQualifiedInterfaceType()6
)
4835
1
        return true;
4836
10
    }
4837
45
4838
45
  }
4839
45
  
return false39
;
4840
45
}
4841
4842
void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4843
9
                                     const char *&RParen) {
4844
9
  const char *argPtr = strchr(Name, '(');
4845
9
  assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
4846
9
4847
9
  LParen = argPtr; // output the start.
4848
9
  argPtr++; // skip past the left paren.
4849
9
  unsigned parenCount = 1;
4850
9
4851
884
  while (*argPtr && parenCount) {
4852
875
    switch (*argPtr) {
4853
875
    
case '(': parenCount++; break10
;
4854
875
    
case ')': parenCount--; break19
;
4855
875
    
default: break846
;
4856
875
    }
4857
875
    if (parenCount) 
argPtr++866
;
4858
875
  }
4859
9
  assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
4860
9
  RParen = argPtr; // output the end
4861
9
}
4862
4863
74
void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4864
74
  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4865
26
    RewriteBlockPointerFunctionArgs(FD);
4866
26
    return;
4867
26
  }
4868
48
  // Handle Variables and Typedefs.
4869
48
  SourceLocation DeclLoc = ND->getLocation();
4870
48
  QualType DeclT;
4871
48
  if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4872
28
    DeclT = VD->getType();
4873
20
  else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
4874
19
    DeclT = TDD->getUnderlyingType();
4875
1
  else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4876
1
    DeclT = FD->getType();
4877
1
  else
4878
1
    
llvm_unreachable0
("RewriteBlockPointerDecl(): Decl type not yet handled");
4879
48
4880
48
  const char *startBuf = SM->getCharacterData(DeclLoc);
4881
48
  const char *endBuf = startBuf;
4882
48
  // scan backward (from the decl location) for the end of the previous decl.
4883
98
  while (*startBuf != '^' && 
*startBuf != ';'50
&&
startBuf != MainFileStart50
)
4884
50
    startBuf--;
4885
48
  SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
4886
48
  std::string buf;
4887
48
  unsigned OrigLength=0;
4888
48
  // *startBuf != '^' if we are dealing with a pointer to function that
4889
48
  // may take block argument types (which will be handled below).
4890
48
  if (*startBuf == '^') {
4891
48
    // Replace the '^' with '*', computing a negative offset.
4892
48
    buf = '*';
4893
48
    startBuf++;
4894
48
    OrigLength++;
4895
48
  }
4896
432
  while (*startBuf != ')') {
4897
384
    buf += *startBuf;
4898
384
    startBuf++;
4899
384
    OrigLength++;
4900
384
  }
4901
48
  buf += ')';
4902
48
  OrigLength++;
4903
48
4904
48
  if (PointerTypeTakesAnyBlockArguments(DeclT) ||
4905
48
      
PointerTypeTakesAnyObjCQualifiedType(DeclT)45
) {
4906
9
    // Replace the '^' with '*' for arguments.
4907
9
    // Replace id<P> with id/*<>*/
4908
9
    DeclLoc = ND->getLocation();
4909
9
    startBuf = SM->getCharacterData(DeclLoc);
4910
9
    const char *argListBegin, *argListEnd;
4911
9
    GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4912
453
    while (argListBegin < argListEnd) {
4913
444
      if (*argListBegin == '^')
4914
5
        buf += '*';
4915
439
      else if (*argListBegin ==  '<') {
4916
17
        buf += "/*";
4917
17
        buf += *argListBegin++;
4918
17
        OrigLength++;
4919
431
        while (*argListBegin != '>') {
4920
414
          buf += *argListBegin++;
4921
414
          OrigLength++;
4922
414
        }
4923
17
        buf += *argListBegin;
4924
17
        buf += "*/";
4925
17
      }
4926
422
      else
4927
422
        buf += *argListBegin;
4928
444
      argListBegin++;
4929
444
      OrigLength++;
4930
444
    }
4931
9
    buf += ')';
4932
9
    OrigLength++;
4933
9
  }
4934
48
  ReplaceText(Start, OrigLength, buf);
4935
48
}
4936
4937
/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4938
/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4939
///                    struct Block_byref_id_object *src) {
4940
///  _Block_object_assign (&_dest->object, _src->object,
4941
///                        BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4942
///                        [|BLOCK_FIELD_IS_WEAK]) // object
4943
///  _Block_object_assign(&_dest->object, _src->object,
4944
///                       BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4945
///                       [|BLOCK_FIELD_IS_WEAK]) // block
4946
/// }
4947
/// And:
4948
/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4949
///  _Block_object_dispose(_src->object,
4950
///                        BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4951
///                        [|BLOCK_FIELD_IS_WEAK]) // object
4952
///  _Block_object_dispose(_src->object,
4953
///                         BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4954
///                         [|BLOCK_FIELD_IS_WEAK]) // block
4955
/// }
4956
4957
std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4958
6
                                                          int flag) {
4959
6
  std::string S;
4960
6
  if (CopyDestroyCache.count(flag))
4961
2
    return S;
4962
4
  CopyDestroyCache.insert(flag);
4963
4
  S = "static void __Block_byref_id_object_copy_";
4964
4
  S += utostr(flag);
4965
4
  S += "(void *dst, void *src) {\n";
4966
4
4967
4
  // offset into the object pointer is computed as:
4968
4
  // void * + void* + int + int + void* + void *
4969
4
  unsigned IntSize =
4970
4
  static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4971
4
  unsigned VoidPtrSize =
4972
4
  static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4973
4
4974
4
  unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4975
4
  S += " _Block_object_assign((char*)dst + ";
4976
4
  S += utostr(offset);
4977
4
  S += ", *(void * *) ((char*)src + ";
4978
4
  S += utostr(offset);
4979
4
  S += "), ";
4980
4
  S += utostr(flag);
4981
4
  S += ");\n}\n";
4982
4
4983
4
  S += "static void __Block_byref_id_object_dispose_";
4984
4
  S += utostr(flag);
4985
4
  S += "(void *src) {\n";
4986
4
  S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4987
4
  S += utostr(offset);
4988
4
  S += "), ";
4989
4
  S += utostr(flag);
4990
4
  S += ");\n}\n";
4991
4
  return S;
4992
4
}
4993
4994
/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4995
/// the declaration into:
4996
/// struct __Block_byref_ND {
4997
/// void *__isa;                  // NULL for everything except __weak pointers
4998
/// struct __Block_byref_ND *__forwarding;
4999
/// int32_t __flags;
5000
/// int32_t __size;
5001
/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
5002
/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5003
/// typex ND;
5004
/// };
5005
///
5006
/// It then replaces declaration of ND variable with:
5007
/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5008
///                               __size=sizeof(struct __Block_byref_ND),
5009
///                               ND=initializer-if-any};
5010
///
5011
///
5012
void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5013
42
                                        bool lastDecl) {
5014
42
  int flag = 0;
5015
42
  int isa = 0;
5016
42
  SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5017
42
  if (DeclLoc.isInvalid())
5018
0
    // If type location is missing, it is because of missing type (a warning).
5019
0
    // Use variable's location which is good for this case.
5020
0
    DeclLoc = ND->getLocation();
5021
42
  const char *startBuf = SM->getCharacterData(DeclLoc);
5022
42
  SourceLocation X = ND->getEndLoc();
5023
42
  X = SM->getExpansionLoc(X);
5024
42
  const char *endBuf = SM->getCharacterData(X);
5025
42
  std::string Name(ND->getNameAsString());
5026
42
  std::string ByrefType;
5027
42
  RewriteByRefString(ByrefType, Name, ND, true);
5028
42
  ByrefType += " {\n";
5029
42
  ByrefType += "  void *__isa;\n";
5030
42
  RewriteByRefString(ByrefType, Name, ND);
5031
42
  ByrefType += " *__forwarding;\n";
5032
42
  ByrefType += " int __flags;\n";
5033
42
  ByrefType += " int __size;\n";
5034
42
  // Add void *__Block_byref_id_object_copy;
5035
42
  // void *__Block_byref_id_object_dispose; if needed.
5036
42
  QualType Ty = ND->getType();
5037
42
  bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
5038
42
  if (HasCopyAndDispose) {
5039
6
    ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5040
6
    ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5041
6
  }
5042
42
5043
42
  QualType T = Ty;
5044
42
  (void)convertBlockPointerToFunctionPointer(T);
5045
42
  T.getAsStringInternal(Name, Context->getPrintingPolicy());
5046
42
5047
42
  ByrefType += " " + Name + ";\n";
5048
42
  ByrefType += "};\n";
5049
42
  // Insert this type in global scope. It is needed by helper function.
5050
42
  SourceLocation FunLocStart;
5051
42
  if (CurFunctionDef)
5052
33
     FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
5053
9
  else {
5054
9
    assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
5055
9
    FunLocStart = CurMethodDef->getBeginLoc();
5056
9
  }
5057
42
  InsertText(FunLocStart, ByrefType);
5058
42
5059
42
  if (Ty.isObjCGCWeak()) {
5060
0
    flag |= BLOCK_FIELD_IS_WEAK;
5061
0
    isa = 1;
5062
0
  }
5063
42
  if (HasCopyAndDispose) {
5064
6
    flag = BLOCK_BYREF_CALLER;
5065
6
    QualType Ty = ND->getType();
5066
6
    // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.