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Remove dead code, caught by unused function warnings.
[clang.git] / lib / Rewrite / RewriteObjC.cpp
blob2cbf5f308c07c28883340114a614ea2eba82cdaf
1 //===--- RewriteObjC.cpp - Playground for the code rewriter ---------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Hacks and fun related to the code rewriter.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Rewrite/ASTConsumers.h"
15 #include "clang/Rewrite/Rewriter.h"
16 #include "clang/AST/AST.h"
17 #include "clang/AST/ASTConsumer.h"
18 #include "clang/AST/ParentMap.h"
19 #include "clang/Basic/SourceManager.h"
20 #include "clang/Basic/IdentifierTable.h"
21 #include "clang/Basic/Diagnostic.h"
22 #include "clang/Lex/Lexer.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/SmallPtrSet.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/DenseSet.h"
29
30 using namespace clang;
31 using llvm::utostr;
32
33 namespace {
34 class RewriteObjC : public ASTConsumer {
35 enum {
36 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
37 block, ... */
38 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
39 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
40 __block variable */
41 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
42 helpers */
43 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
44 support routines */
45 BLOCK_BYREF_CURRENT_MAX = 256
46 };
47
48 enum {
49 BLOCK_NEEDS_FREE = (1 << 24),
50 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
51 BLOCK_HAS_CXX_OBJ = (1 << 26),
52 BLOCK_IS_GC = (1 << 27),
53 BLOCK_IS_GLOBAL = (1 << 28),
54 BLOCK_HAS_DESCRIPTOR = (1 << 29)
55 };
56
57 Rewriter Rewrite;
58 Diagnostic &Diags;
59 const LangOptions &LangOpts;
60 unsigned RewriteFailedDiag;
61 unsigned TryFinallyContainsReturnDiag;
62
63 ASTContext *Context;
64 SourceManager *SM;
65 TranslationUnitDecl *TUDecl;
66 FileID MainFileID;
67 const char *MainFileStart, *MainFileEnd;
68 SourceLocation LastIncLoc;
69
70 llvm::SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
71 llvm::SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
72 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
73 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
74 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCForwardDecls;
75 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
76 llvm::SmallVector<Stmt *, 32> Stmts;
77 llvm::SmallVector<int, 8> ObjCBcLabelNo;
78 // Remember all the @protocol(<expr>) expressions.
79 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
80
81 llvm::DenseSet<uint64_t> CopyDestroyCache;
82
83 unsigned NumObjCStringLiterals;
84
85 FunctionDecl *MsgSendFunctionDecl;
86 FunctionDecl *MsgSendSuperFunctionDecl;
87 FunctionDecl *MsgSendStretFunctionDecl;
88 FunctionDecl *MsgSendSuperStretFunctionDecl;
89 FunctionDecl *MsgSendFpretFunctionDecl;
90 FunctionDecl *GetClassFunctionDecl;
91 FunctionDecl *GetMetaClassFunctionDecl;
92 FunctionDecl *GetSuperClassFunctionDecl;
93 FunctionDecl *SelGetUidFunctionDecl;
94 FunctionDecl *CFStringFunctionDecl;
95 FunctionDecl *SuperContructorFunctionDecl;
96
97 // ObjC string constant support.
98 VarDecl *ConstantStringClassReference;
99 RecordDecl *NSStringRecord;
100
101 // ObjC foreach break/continue generation support.
102 int BcLabelCount;
103
104 // Needed for super.
105 ObjCMethodDecl *CurMethodDef;
106 RecordDecl *SuperStructDecl;
107 RecordDecl *ConstantStringDecl;
108
109 TypeDecl *ProtocolTypeDecl;
110 QualType getProtocolType();
111
112 // Needed for header files being rewritten
113 bool IsHeader;
114
115 std::string InFileName;
116 llvm::raw_ostream* OutFile;
117
118 bool SilenceRewriteMacroWarning;
119 bool objc_impl_method;
120
121 std::string Preamble;
122
123 // Block expressions.
124 llvm::SmallVector<BlockExpr *, 32> Blocks;
125 llvm::SmallVector<int, 32> InnerDeclRefsCount;
126 llvm::SmallVector<BlockDeclRefExpr *, 32> InnerDeclRefs;
127
128 llvm::SmallVector<BlockDeclRefExpr *, 32> BlockDeclRefs;
129
130 // Block related declarations.
131 llvm::SmallVector<ValueDecl *, 8> BlockByCopyDecls;
132 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
133 llvm::SmallVector<ValueDecl *, 8> BlockByRefDecls;
134 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
135 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
136 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
137 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
138
139 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
140
141 // This maps a property to it's assignment statement.
142 llvm::DenseMap<ObjCPropertyRefExpr *, BinaryOperator *> PropSetters;
143 // This maps a property to it's synthesied message expression.
144 // This allows us to rewrite chained getters (e.g. o.a.b.c).
145 llvm::DenseMap<ObjCPropertyRefExpr *, Stmt *> PropGetters;
146
147 // This maps an original source AST to it's rewritten form. This allows
148 // us to avoid rewriting the same node twice (which is very uncommon).
149 // This is needed to support some of the exotic property rewriting.
150 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
151
152 FunctionDecl *CurFunctionDef;
153 FunctionDecl *CurFunctionDeclToDeclareForBlock;
154 VarDecl *GlobalVarDecl;
155
156 bool DisableReplaceStmt;
157
158 static const int OBJC_ABI_VERSION =7 ;
159 public:
160 virtual void Initialize(ASTContext &context);
161
162 // Top Level Driver code.
163 virtual void HandleTopLevelDecl(DeclGroupRef D) {
164 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I)
165 HandleTopLevelSingleDecl(*I);
166 }
167 void HandleTopLevelSingleDecl(Decl *D);
168 void HandleDeclInMainFile(Decl *D);
169 RewriteObjC(std::string inFile, llvm::raw_ostream *OS,
170 Diagnostic &D, const LangOptions &LOpts,
171 bool silenceMacroWarn);
172
173 ~RewriteObjC() {}
174
175 virtual void HandleTranslationUnit(ASTContext &C);
176
177 void ReplaceStmt(Stmt *Old, Stmt *New) {
178 Stmt *ReplacingStmt = ReplacedNodes[Old];
179
180 if (ReplacingStmt)
181 return; // We can't rewrite the same node twice.
182
183 if (DisableReplaceStmt)
184 return; // Used when rewriting the assignment of a property setter.
185
186 // If replacement succeeded or warning disabled return with no warning.
187 if (!Rewrite.ReplaceStmt(Old, New)) {
188 ReplacedNodes[Old] = New;
189 return;
190 }
191 if (SilenceRewriteMacroWarning)
192 return;
193 Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
194 << Old->getSourceRange();
195 }
196
197 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
198 // Measaure the old text.
199 int Size = Rewrite.getRangeSize(SrcRange);
200 if (Size == -1) {
201 Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
202 << Old->getSourceRange();
203 return;
204 }
205 // Get the new text.
206 std::string SStr;
207 llvm::raw_string_ostream S(SStr);
208 New->printPretty(S, *Context, 0, PrintingPolicy(LangOpts));
209 const std::string &Str = S.str();
210
211 // If replacement succeeded or warning disabled return with no warning.
212 if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
213 ReplacedNodes[Old] = New;
214 return;
215 }
216 if (SilenceRewriteMacroWarning)
217 return;
218 Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
219 << Old->getSourceRange();
220 }
221
222 void InsertText(SourceLocation Loc, llvm::StringRef Str,
223 bool InsertAfter = true) {
224 // If insertion succeeded or warning disabled return with no warning.
225 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
226 SilenceRewriteMacroWarning)
227 return;
228
229 Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
230 }
231
232 void ReplaceText(SourceLocation Start, unsigned OrigLength,
233 llvm::StringRef Str) {
234 // If removal succeeded or warning disabled return with no warning.
235 if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
236 SilenceRewriteMacroWarning)
237 return;
238
239 Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
240 }
241
242 // Syntactic Rewriting.
243 void RewriteInclude();
244 void RewriteForwardClassDecl(ObjCClassDecl *Dcl);
245 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
246 ObjCImplementationDecl *IMD,
247 ObjCCategoryImplDecl *CID);
248 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
249 void RewriteImplementationDecl(Decl *Dcl);
250 void RewriteObjCMethodDecl(ObjCMethodDecl *MDecl, std::string &ResultStr);
251 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
252 const FunctionType *&FPRetType);
253 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
254 ValueDecl *VD);
255 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
256 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
257 void RewriteForwardProtocolDecl(ObjCForwardProtocolDecl *Dcl);
258 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
259 void RewriteProperty(ObjCPropertyDecl *prop);
260 void RewriteFunctionDecl(FunctionDecl *FD);
261 void RewriteBlockPointerType(std::string& Str, QualType Type);
262 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
263 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
264 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
265 void RewriteTypeOfDecl(VarDecl *VD);
266 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
267 bool needToScanForQualifiers(QualType T);
268 QualType getSuperStructType();
269 QualType getConstantStringStructType();
270 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
271 bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
272
273 // Expression Rewriting.
274 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
275 void CollectPropertySetters(Stmt *S);
276
277 Stmt *CurrentBody;
278 ParentMap *PropParentMap; // created lazily.
279
280 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
281 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV, SourceLocation OrigStart,
282 bool &replaced);
283 Stmt *RewriteObjCNestedIvarRefExpr(Stmt *S, bool &replaced);
284 Stmt *RewritePropertyGetter(ObjCPropertyRefExpr *PropRefExpr);
285 Stmt *RewritePropertySetter(BinaryOperator *BinOp, Expr *newStmt,
286 SourceRange SrcRange);
287 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
288 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
289 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
290 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
291 void WarnAboutReturnGotoStmts(Stmt *S);
292 void HasReturnStmts(Stmt *S, bool &hasReturns);
293 void RewriteTryReturnStmts(Stmt *S);
294 void RewriteSyncReturnStmts(Stmt *S, std::string buf);
295 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
296 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
297 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
298 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
299 SourceLocation OrigEnd);
300 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
301 Expr **args, unsigned nargs,
302 SourceLocation StartLoc=SourceLocation(),
303 SourceLocation EndLoc=SourceLocation());
304 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
305 SourceLocation StartLoc=SourceLocation(),
306 SourceLocation EndLoc=SourceLocation());
307 Stmt *RewriteBreakStmt(BreakStmt *S);
308 Stmt *RewriteContinueStmt(ContinueStmt *S);
309 void SynthCountByEnumWithState(std::string &buf);
310
311 void SynthMsgSendFunctionDecl();
312 void SynthMsgSendSuperFunctionDecl();
313 void SynthMsgSendStretFunctionDecl();
314 void SynthMsgSendFpretFunctionDecl();
315 void SynthMsgSendSuperStretFunctionDecl();
316 void SynthGetClassFunctionDecl();
317 void SynthGetMetaClassFunctionDecl();
318 void SynthGetSuperClassFunctionDecl();
319 void SynthSelGetUidFunctionDecl();
320 void SynthSuperContructorFunctionDecl();
321
322 // Metadata emission.
323 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
324 std::string &Result);
325
326 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
327 std::string &Result);
328
329 template<typename MethodIterator>
330 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
331 MethodIterator MethodEnd,
332 bool IsInstanceMethod,
333 const char *prefix,
334 const char *ClassName,
335 std::string &Result);
336
337 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
338 const char *prefix,
339 const char *ClassName,
340 std::string &Result);
341 void RewriteObjCProtocolListMetaData(const ObjCList<ObjCProtocolDecl> &Prots,
342 const char *prefix,
343 const char *ClassName,
344 std::string &Result);
345 void SynthesizeObjCInternalStruct(ObjCInterfaceDecl *CDecl,
346 std::string &Result);
347 void SynthesizeIvarOffsetComputation(ObjCContainerDecl *IDecl,
348 ObjCIvarDecl *ivar,
349 std::string &Result);
350 void RewriteImplementations();
351 void SynthesizeMetaDataIntoBuffer(std::string &Result);
352
353 // Block rewriting.
354 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
355 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
356
357 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
358 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
359
360 // Block specific rewrite rules.
361 void RewriteBlockPointerDecl(NamedDecl *VD);
362 void RewriteByRefVar(VarDecl *VD);
363 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
364 Stmt *RewriteBlockDeclRefExpr(Expr *VD);
365 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
366 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
367
368 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
369 const char *funcName, std::string Tag);
370 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
371 const char *funcName, std::string Tag);
372 std::string SynthesizeBlockImpl(BlockExpr *CE,
373 std::string Tag, std::string Desc);
374 std::string SynthesizeBlockDescriptor(std::string DescTag,
375 std::string ImplTag,
376 int i, const char *funcName,
377 unsigned hasCopy);
378 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
379 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
380 const char *FunName);
381 void RewriteRecordBody(RecordDecl *RD);
382
383 void CollectBlockDeclRefInfo(BlockExpr *Exp);
384 void GetBlockDeclRefExprs(Stmt *S);
385 void GetInnerBlockDeclRefExprs(Stmt *S,
386 llvm::SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs,
387 llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
388
389 // We avoid calling Type::isBlockPointerType(), since it operates on the
390 // canonical type. We only care if the top-level type is a closure pointer.
391 bool isTopLevelBlockPointerType(QualType T) {
392 return isa<BlockPointerType>(T);
393 }
394
395 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
396 /// to a function pointer type and upon success, returns true; false
397 /// otherwise.
398 bool convertBlockPointerToFunctionPointer(QualType &T) {
399 if (isTopLevelBlockPointerType(T)) {
400 const BlockPointerType *BPT = T->getAs<BlockPointerType>();
401 T = Context->getPointerType(BPT->getPointeeType());
402 return true;
403 }
404 return false;
405 }
406
407 // FIXME: This predicate seems like it would be useful to add to ASTContext.
408 bool isObjCType(QualType T) {
409 if (!LangOpts.ObjC1 && !LangOpts.ObjC2)
410 return false;
411
412 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
413
414 if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
415 OCT == Context->getCanonicalType(Context->getObjCClassType()))
416 return true;
417
418 if (const PointerType *PT = OCT->getAs<PointerType>()) {
419 if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
420 PT->getPointeeType()->isObjCQualifiedIdType())
421 return true;
422 }
423 return false;
424 }
425 bool PointerTypeTakesAnyBlockArguments(QualType QT);
426 void GetExtentOfArgList(const char *Name, const char *&LParen,
427 const char *&RParen);
428 void RewriteCastExpr(CStyleCastExpr *CE);
429
430 FunctionDecl *SynthBlockInitFunctionDecl(const char *name);
431 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
432 const llvm::SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs);
433
434 void QuoteDoublequotes(std::string &From, std::string &To) {
435 for (unsigned i = 0; i < From.length(); i++) {
436 if (From[i] == '"')
437 To += "\\\"";
438 else
439 To += From[i];
440 }
441 }
442 };
443
444 // Helper function: create a CStyleCastExpr with trivial type source info.
445 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
446 CastExpr::CastKind Kind, Expr *E) {
447 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
448 return CStyleCastExpr::Create(*Ctx, Ty, Kind, E, 0, TInfo,
449 SourceLocation(), SourceLocation());
450 }
451 }
452
453 void RewriteObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
454 NamedDecl *D) {
455 if (FunctionProtoType *fproto = dyn_cast<FunctionProtoType>(funcType)) {
456 for (FunctionProtoType::arg_type_iterator I = fproto->arg_type_begin(),
457 E = fproto->arg_type_end(); I && (I != E); ++I)
458 if (isTopLevelBlockPointerType(*I)) {
459 // All the args are checked/rewritten. Don't call twice!
460 RewriteBlockPointerDecl(D);
461 break;
462 }
463 }
464 }
465
466 void RewriteObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
467 const PointerType *PT = funcType->getAs<PointerType>();
468 if (PT && PointerTypeTakesAnyBlockArguments(funcType))
469 RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
470 }
471
472 static bool IsHeaderFile(const std::string &Filename) {
473 std::string::size_type DotPos = Filename.rfind('.');
474
475 if (DotPos == std::string::npos) {
476 // no file extension
477 return false;
478 }
479
480 std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
481 // C header: .h
482 // C++ header: .hh or .H;
483 return Ext == "h" || Ext == "hh" || Ext == "H";
484 }
485
486 RewriteObjC::RewriteObjC(std::string inFile, llvm::raw_ostream* OS,
487 Diagnostic &D, const LangOptions &LOpts,
488 bool silenceMacroWarn)
489 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(OS),
490 SilenceRewriteMacroWarning(silenceMacroWarn) {
491 IsHeader = IsHeaderFile(inFile);
492 RewriteFailedDiag = Diags.getCustomDiagID(Diagnostic::Warning,
493 "rewriting sub-expression within a macro (may not be correct)");
494 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(Diagnostic::Warning,
495 "rewriter doesn't support user-specified control flow semantics "
496 "for @try/@finally (code may not execute properly)");
497 }
498
499 ASTConsumer *clang::CreateObjCRewriter(const std::string& InFile,
500 llvm::raw_ostream* OS,
501 Diagnostic &Diags,
502 const LangOptions &LOpts,
503 bool SilenceRewriteMacroWarning) {
504 return new RewriteObjC(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
505 }
506
507 void RewriteObjC::Initialize(ASTContext &context) {
508 Context = &context;
509 SM = &Context->getSourceManager();
510 TUDecl = Context->getTranslationUnitDecl();
511 MsgSendFunctionDecl = 0;
512 MsgSendSuperFunctionDecl = 0;
513 MsgSendStretFunctionDecl = 0;
514 MsgSendSuperStretFunctionDecl = 0;
515 MsgSendFpretFunctionDecl = 0;
516 GetClassFunctionDecl = 0;
517 GetMetaClassFunctionDecl = 0;
518 GetSuperClassFunctionDecl = 0;
519 SelGetUidFunctionDecl = 0;
520 CFStringFunctionDecl = 0;
521 ConstantStringClassReference = 0;
522 NSStringRecord = 0;
523 CurMethodDef = 0;
524 CurFunctionDef = 0;
525 CurFunctionDeclToDeclareForBlock = 0;
526 GlobalVarDecl = 0;
527 SuperStructDecl = 0;
528 ProtocolTypeDecl = 0;
529 ConstantStringDecl = 0;
530 BcLabelCount = 0;
531 SuperContructorFunctionDecl = 0;
532 NumObjCStringLiterals = 0;
533 PropParentMap = 0;
534 CurrentBody = 0;
535 DisableReplaceStmt = false;
536 objc_impl_method = false;
537
538 // Get the ID and start/end of the main file.
539 MainFileID = SM->getMainFileID();
540 const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
541 MainFileStart = MainBuf->getBufferStart();
542 MainFileEnd = MainBuf->getBufferEnd();
543
544 Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOptions());
545
546 // declaring objc_selector outside the parameter list removes a silly
547 // scope related warning...
548 if (IsHeader)
549 Preamble = "#pragma once\n";
550 Preamble += "struct objc_selector; struct objc_class;\n";
551 Preamble += "struct __rw_objc_super { struct objc_object *object; ";
552 Preamble += "struct objc_object *superClass; ";
553 if (LangOpts.Microsoft) {
554 // Add a constructor for creating temporary objects.
555 Preamble += "__rw_objc_super(struct objc_object *o, struct objc_object *s) "
556 ": ";
557 Preamble += "object(o), superClass(s) {} ";
558 }
559 Preamble += "};\n";
560 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
561 Preamble += "typedef struct objc_object Protocol;\n";
562 Preamble += "#define _REWRITER_typedef_Protocol\n";
563 Preamble += "#endif\n";
564 if (LangOpts.Microsoft) {
565 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
566 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
567 } else
568 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
569 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSend";
570 Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
571 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSendSuper";
572 Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
573 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSend_stret";
574 Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
575 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSendSuper_stret";
576 Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
577 Preamble += "__OBJC_RW_DLLIMPORT double objc_msgSend_fpret";
578 Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
579 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getClass";
580 Preamble += "(const char *);\n";
581 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
582 Preamble += "(struct objc_class *);\n";
583 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
584 Preamble += "(const char *);\n";
585 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw(struct objc_object *);\n";
586 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_enter(void *);\n";
587 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_exit(void *);\n";
588 Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_exception_extract(void *);\n";
589 Preamble += "__OBJC_RW_DLLIMPORT int objc_exception_match";
590 Preamble += "(struct objc_class *, struct objc_object *);\n";
591 // @synchronized hooks.
592 Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_enter(struct objc_object *);\n";
593 Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_exit(struct objc_object *);\n";
594 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
595 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
596 Preamble += "struct __objcFastEnumerationState {\n\t";
597 Preamble += "unsigned long state;\n\t";
598 Preamble += "void **itemsPtr;\n\t";
599 Preamble += "unsigned long *mutationsPtr;\n\t";
600 Preamble += "unsigned long extra[5];\n};\n";
601 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
602 Preamble += "#define __FASTENUMERATIONSTATE\n";
603 Preamble += "#endif\n";
604 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
605 Preamble += "struct __NSConstantStringImpl {\n";
606 Preamble += " int *isa;\n";
607 Preamble += " int flags;\n";
608 Preamble += " char *str;\n";
609 Preamble += " long length;\n";
610 Preamble += "};\n";
611 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
612 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
613 Preamble += "#else\n";
614 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
615 Preamble += "#endif\n";
616 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
617 Preamble += "#endif\n";
618 // Blocks preamble.
619 Preamble += "#ifndef BLOCK_IMPL\n";
620 Preamble += "#define BLOCK_IMPL\n";
621 Preamble += "struct __block_impl {\n";
622 Preamble += " void *isa;\n";
623 Preamble += " int Flags;\n";
624 Preamble += " int Reserved;\n";
625 Preamble += " void *FuncPtr;\n";
626 Preamble += "};\n";
627 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
628 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
629 Preamble += "extern \"C\" __declspec(dllexport) "
630 "void _Block_object_assign(void *, const void *, const int);\n";
631 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
632 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
633 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
634 Preamble += "#else\n";
635 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
636 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
637 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
638 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
639 Preamble += "#endif\n";
640 Preamble += "#endif\n";
641 if (LangOpts.Microsoft) {
642 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
643 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
644 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
645 Preamble += "#define __attribute__(X)\n";
646 Preamble += "#endif\n";
647 Preamble += "#define __weak\n";
648 }
649 else {
650 Preamble += "#define __block\n";
651 Preamble += "#define __weak\n";
652 }
653 // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
654 // as this avoids warning in any 64bit/32bit compilation model.
655 Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
656 }
657
658
659 //===----------------------------------------------------------------------===//
660 // Top Level Driver Code
661 //===----------------------------------------------------------------------===//
662
663 void RewriteObjC::HandleTopLevelSingleDecl(Decl *D) {
664 if (Diags.hasErrorOccurred())
665 return;
666
667 // Two cases: either the decl could be in the main file, or it could be in a
668 // #included file. If the former, rewrite it now. If the later, check to see
669 // if we rewrote the #include/#import.
670 SourceLocation Loc = D->getLocation();
671 Loc = SM->getInstantiationLoc(Loc);
672
673 // If this is for a builtin, ignore it.
674 if (Loc.isInvalid()) return;
675
676 // Look for built-in declarations that we need to refer during the rewrite.
677 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
678 RewriteFunctionDecl(FD);
679 } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
680 // declared in <Foundation/NSString.h>
681 if (strcmp(FVD->getNameAsCString(), "_NSConstantStringClassReference") == 0) {
682 ConstantStringClassReference = FVD;
683 return;
684 }
685 } else if (ObjCInterfaceDecl *MD = dyn_cast<ObjCInterfaceDecl>(D)) {
686 RewriteInterfaceDecl(MD);
687 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
688 RewriteCategoryDecl(CD);
689 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
690 RewriteProtocolDecl(PD);
691 } else if (ObjCForwardProtocolDecl *FP =
692 dyn_cast<ObjCForwardProtocolDecl>(D)){
693 RewriteForwardProtocolDecl(FP);
694 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
695 // Recurse into linkage specifications
696 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
697 DIEnd = LSD->decls_end();
698 DI != DIEnd; ++DI)
699 HandleTopLevelSingleDecl(*DI);
700 }
701 // If we have a decl in the main file, see if we should rewrite it.
702 if (SM->isFromMainFile(Loc))
703 return HandleDeclInMainFile(D);
704 }
705
706 //===----------------------------------------------------------------------===//
707 // Syntactic (non-AST) Rewriting Code
708 //===----------------------------------------------------------------------===//
709
710 void RewriteObjC::RewriteInclude() {
711 SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
712 llvm::StringRef MainBuf = SM->getBufferData(MainFileID);
713 const char *MainBufStart = MainBuf.begin();
714 const char *MainBufEnd = MainBuf.end();
715 size_t ImportLen = strlen("import");
716
717 // Loop over the whole file, looking for includes.
718 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
719 if (*BufPtr == '#') {
720 if (++BufPtr == MainBufEnd)
721 return;
722 while (*BufPtr == ' ' || *BufPtr == '\t')
723 if (++BufPtr == MainBufEnd)
724 return;
725 if (!strncmp(BufPtr, "import", ImportLen)) {
726 // replace import with include
727 SourceLocation ImportLoc =
728 LocStart.getFileLocWithOffset(BufPtr-MainBufStart);
729 ReplaceText(ImportLoc, ImportLen, "include");
730 BufPtr += ImportLen;
731 }
732 }
733 }
734 }
735
736 static std::string getIvarAccessString(ObjCInterfaceDecl *ClassDecl,
737 ObjCIvarDecl *OID) {
738 std::string S;
739 S = "((struct ";
740 S += ClassDecl->getIdentifier()->getName();
741 S += "_IMPL *)self)->";
742 S += OID->getName();
743 return S;
744 }
745
746 void RewriteObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
747 ObjCImplementationDecl *IMD,
748 ObjCCategoryImplDecl *CID) {
749 static bool objcGetPropertyDefined = false;
750 static bool objcSetPropertyDefined = false;
751 SourceLocation startLoc = PID->getLocStart();
752 InsertText(startLoc, "// ");
753 const char *startBuf = SM->getCharacterData(startLoc);
754 assert((*startBuf == '@') && "bogus @synthesize location");
755 const char *semiBuf = strchr(startBuf, ';');
756 assert((*semiBuf == ';') && "@synthesize: can't find ';'");
757 SourceLocation onePastSemiLoc =
758 startLoc.getFileLocWithOffset(semiBuf-startBuf+1);
759
760 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
761 return; // FIXME: is this correct?
762
763 // Generate the 'getter' function.
764 ObjCPropertyDecl *PD = PID->getPropertyDecl();
765 ObjCInterfaceDecl *ClassDecl = PD->getGetterMethodDecl()->getClassInterface();
766 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
767
768 if (!OID)
769 return;
770 unsigned Attributes = PD->getPropertyAttributes();
771 bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
772 (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
773 ObjCPropertyDecl::OBJC_PR_copy));
774 std::string Getr;
775 if (GenGetProperty && !objcGetPropertyDefined) {
776 objcGetPropertyDefined = true;
777 // FIXME. Is this attribute correct in all cases?
778 Getr = "\nextern \"C\" __declspec(dllimport) "
779 "id objc_getProperty(id, SEL, long, bool);\n";
780 }
781 RewriteObjCMethodDecl(PD->getGetterMethodDecl(), Getr);
782 Getr += "{ ";
783 // Synthesize an explicit cast to gain access to the ivar.
784 // See objc-act.c:objc_synthesize_new_getter() for details.
785 if (GenGetProperty) {
786 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
787 Getr += "typedef ";
788 const FunctionType *FPRetType = 0;
789 RewriteTypeIntoString(PD->getGetterMethodDecl()->getResultType(), Getr,
790 FPRetType);
791 Getr += " _TYPE";
792 if (FPRetType) {
793 Getr += ")"; // close the precedence "scope" for "*".
794
795 // Now, emit the argument types (if any).
796 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
797 Getr += "(";
798 for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
799 if (i) Getr += ", ";
800 std::string ParamStr = FT->getArgType(i).getAsString(
801 Context->PrintingPolicy);
802 Getr += ParamStr;
803 }
804 if (FT->isVariadic()) {
805 if (FT->getNumArgs()) Getr += ", ";
806 Getr += "...";
807 }
808 Getr += ")";
809 } else
810 Getr += "()";
811 }
812 Getr += ";\n";
813 Getr += "return (_TYPE)";
814 Getr += "objc_getProperty(self, _cmd, ";
815 SynthesizeIvarOffsetComputation(ClassDecl, OID, Getr);
816 Getr += ", 1)";
817 }
818 else
819 Getr += "return " + getIvarAccessString(ClassDecl, OID);
820 Getr += "; }";
821 InsertText(onePastSemiLoc, Getr);
822 if (PD->isReadOnly())
823 return;
824
825 // Generate the 'setter' function.
826 std::string Setr;
827 bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
828 ObjCPropertyDecl::OBJC_PR_copy);
829 if (GenSetProperty && !objcSetPropertyDefined) {
830 objcSetPropertyDefined = true;
831 // FIXME. Is this attribute correct in all cases?
832 Setr = "\nextern \"C\" __declspec(dllimport) "
833 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
834 }
835
836 RewriteObjCMethodDecl(PD->getSetterMethodDecl(), Setr);
837 Setr += "{ ";
838 // Synthesize an explicit cast to initialize the ivar.
839 // See objc-act.c:objc_synthesize_new_setter() for details.
840 if (GenSetProperty) {
841 Setr += "objc_setProperty (self, _cmd, ";
842 SynthesizeIvarOffsetComputation(ClassDecl, OID, Setr);
843 Setr += ", (id)";
844 Setr += PD->getNameAsCString();
845 Setr += ", ";
846 if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
847 Setr += "0, ";
848 else
849 Setr += "1, ";
850 if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
851 Setr += "1)";
852 else
853 Setr += "0)";
854 }
855 else {
856 Setr += getIvarAccessString(ClassDecl, OID) + " = ";
857 Setr += PD->getNameAsCString();
858 }
859 Setr += "; }";
860 InsertText(onePastSemiLoc, Setr);
861 }
862
863 void RewriteObjC::RewriteForwardClassDecl(ObjCClassDecl *ClassDecl) {
864 // Get the start location and compute the semi location.
865 SourceLocation startLoc = ClassDecl->getLocation();
866 const char *startBuf = SM->getCharacterData(startLoc);
867 const char *semiPtr = strchr(startBuf, ';');
868
869 // Translate to typedef's that forward reference structs with the same name
870 // as the class. As a convenience, we include the original declaration
871 // as a comment.
872 std::string typedefString;
873 typedefString += "// @class ";
874 for (ObjCClassDecl::iterator I = ClassDecl->begin(), E = ClassDecl->end();
875 I != E; ++I) {
876 ObjCInterfaceDecl *ForwardDecl = I->getInterface();
877 typedefString += ForwardDecl->getNameAsString();
878 if (I+1 != E)
879 typedefString += ", ";
880 else
881 typedefString += ";\n";
882 }
883
884 for (ObjCClassDecl::iterator I = ClassDecl->begin(), E = ClassDecl->end();
885 I != E; ++I) {
886 ObjCInterfaceDecl *ForwardDecl = I->getInterface();
887 typedefString += "#ifndef _REWRITER_typedef_";
888 typedefString += ForwardDecl->getNameAsString();
889 typedefString += "\n";
890 typedefString += "#define _REWRITER_typedef_";
891 typedefString += ForwardDecl->getNameAsString();
892 typedefString += "\n";
893 typedefString += "typedef struct objc_object ";
894 typedefString += ForwardDecl->getNameAsString();
895 typedefString += ";\n#endif\n";
896 }
897
898 // Replace the @class with typedefs corresponding to the classes.
899 ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
900 }
901
902 void RewriteObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
903 // When method is a synthesized one, such as a getter/setter there is
904 // nothing to rewrite.
905 if (Method->isSynthesized())
906 return;
907 SourceLocation LocStart = Method->getLocStart();
908 SourceLocation LocEnd = Method->getLocEnd();
909
910 if (SM->getInstantiationLineNumber(LocEnd) >
911 SM->getInstantiationLineNumber(LocStart)) {
912 InsertText(LocStart, "#if 0\n");
913 ReplaceText(LocEnd, 1, ";\n#endif\n");
914 } else {
915 InsertText(LocStart, "// ");
916 }
917 }
918
919 void RewriteObjC::RewriteProperty(ObjCPropertyDecl *prop) {
920 SourceLocation Loc = prop->getAtLoc();
921
922 ReplaceText(Loc, 0, "// ");
923 // FIXME: handle properties that are declared across multiple lines.
924 }
925
926 void RewriteObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
927 SourceLocation LocStart = CatDecl->getLocStart();
928
929 // FIXME: handle category headers that are declared across multiple lines.
930 ReplaceText(LocStart, 0, "// ");
931
932 for (ObjCCategoryDecl::prop_iterator I = CatDecl->prop_begin(),
933 E = CatDecl->prop_end(); I != E; ++I)
934 RewriteProperty(*I);
935
936 for (ObjCCategoryDecl::instmeth_iterator
937 I = CatDecl->instmeth_begin(), E = CatDecl->instmeth_end();
938 I != E; ++I)
939 RewriteMethodDeclaration(*I);
940 for (ObjCCategoryDecl::classmeth_iterator
941 I = CatDecl->classmeth_begin(), E = CatDecl->classmeth_end();
942 I != E; ++I)
943 RewriteMethodDeclaration(*I);
944
945 // Lastly, comment out the @end.
946 ReplaceText(CatDecl->getAtEndRange().getBegin(),
947 strlen("@end"), "/* @end */");
948 }
949
950 void RewriteObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
951 SourceLocation LocStart = PDecl->getLocStart();
952
953 // FIXME: handle protocol headers that are declared across multiple lines.
954 ReplaceText(LocStart, 0, "// ");
955
956 for (ObjCProtocolDecl::instmeth_iterator
957 I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
958 I != E; ++I)
959 RewriteMethodDeclaration(*I);
960 for (ObjCProtocolDecl::classmeth_iterator
961 I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
962 I != E; ++I)
963 RewriteMethodDeclaration(*I);
964
965 // Lastly, comment out the @end.
966 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
967 ReplaceText(LocEnd, strlen("@end"), "/* @end */");
968
969 // Must comment out @optional/@required
970 const char *startBuf = SM->getCharacterData(LocStart);
971 const char *endBuf = SM->getCharacterData(LocEnd);
972 for (const char *p = startBuf; p < endBuf; p++) {
973 if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
974 SourceLocation OptionalLoc = LocStart.getFileLocWithOffset(p-startBuf);
975 ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
976
977 }
978 else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
979 SourceLocation OptionalLoc = LocStart.getFileLocWithOffset(p-startBuf);
980 ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
981
982 }
983 }
984 }
985
986 void RewriteObjC::RewriteForwardProtocolDecl(ObjCForwardProtocolDecl *PDecl) {
987 SourceLocation LocStart = PDecl->getLocation();
988 if (LocStart.isInvalid())
989 assert(false && "Invalid SourceLocation");
990 // FIXME: handle forward protocol that are declared across multiple lines.
991 ReplaceText(LocStart, 0, "// ");
992 }
993
994 void RewriteObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
995 const FunctionType *&FPRetType) {
996 if (T->isObjCQualifiedIdType())
997 ResultStr += "id";
998 else if (T->isFunctionPointerType() ||
999 T->isBlockPointerType()) {
1000 // needs special handling, since pointer-to-functions have special
1001 // syntax (where a decaration models use).
1002 QualType retType = T;
1003 QualType PointeeTy;
1004 if (const PointerType* PT = retType->getAs<PointerType>())
1005 PointeeTy = PT->getPointeeType();
1006 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1007 PointeeTy = BPT->getPointeeType();
1008 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1009 ResultStr += FPRetType->getResultType().getAsString(
1010 Context->PrintingPolicy);
1011 ResultStr += "(*";
1012 }
1013 } else
1014 ResultStr += T.getAsString(Context->PrintingPolicy);
1015 }
1016
1017 void RewriteObjC::RewriteObjCMethodDecl(ObjCMethodDecl *OMD,
1018 std::string &ResultStr) {
1019 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1020 const FunctionType *FPRetType = 0;
1021 ResultStr += "\nstatic ";
1022 RewriteTypeIntoString(OMD->getResultType(), ResultStr, FPRetType);
1023 ResultStr += " ";
1024
1025 // Unique method name
1026 std::string NameStr;
1027
1028 if (OMD->isInstanceMethod())
1029 NameStr += "_I_";
1030 else
1031 NameStr += "_C_";
1032
1033 NameStr += OMD->getClassInterface()->getNameAsString();
1034 NameStr += "_";
1035
1036 if (ObjCCategoryImplDecl *CID =
1037 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1038 NameStr += CID->getNameAsString();
1039 NameStr += "_";
1040 }
1041 // Append selector names, replacing ':' with '_'
1042 {
1043 std::string selString = OMD->getSelector().getAsString();
1044 int len = selString.size();
1045 for (int i = 0; i < len; i++)
1046 if (selString[i] == ':')
1047 selString[i] = '_';
1048 NameStr += selString;
1049 }
1050 // Remember this name for metadata emission
1051 MethodInternalNames[OMD] = NameStr;
1052 ResultStr += NameStr;
1053
1054 // Rewrite arguments
1055 ResultStr += "(";
1056
1057 // invisible arguments
1058 if (OMD->isInstanceMethod()) {
1059 QualType selfTy = Context->getObjCInterfaceType(OMD->getClassInterface());
1060 selfTy = Context->getPointerType(selfTy);
1061 if (!LangOpts.Microsoft) {
1062 if (ObjCSynthesizedStructs.count(OMD->getClassInterface()))
1063 ResultStr += "struct ";
1064 }
1065 // When rewriting for Microsoft, explicitly omit the structure name.
1066 ResultStr += OMD->getClassInterface()->getNameAsString();
1067 ResultStr += " *";
1068 }
1069 else
1070 ResultStr += Context->getObjCClassType().getAsString(
1071 Context->PrintingPolicy);
1072
1073 ResultStr += " self, ";
1074 ResultStr += Context->getObjCSelType().getAsString(Context->PrintingPolicy);
1075 ResultStr += " _cmd";
1076
1077 // Method arguments.
1078 for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
1079 E = OMD->param_end(); PI != E; ++PI) {
1080 ParmVarDecl *PDecl = *PI;
1081 ResultStr += ", ";
1082 if (PDecl->getType()->isObjCQualifiedIdType()) {
1083 ResultStr += "id ";
1084 ResultStr += PDecl->getNameAsString();
1085 } else {
1086 std::string Name = PDecl->getNameAsString();
1087 QualType QT = PDecl->getType();
1088 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1089 if (convertBlockPointerToFunctionPointer(QT))
1090 QT.getAsStringInternal(Name, Context->PrintingPolicy);
1091 else
1092 PDecl->getType().getAsStringInternal(Name, Context->PrintingPolicy);
1093 ResultStr += Name;
1094 }
1095 }
1096 if (OMD->isVariadic())
1097 ResultStr += ", ...";
1098 ResultStr += ") ";
1099
1100 if (FPRetType) {
1101 ResultStr += ")"; // close the precedence "scope" for "*".
1102
1103 // Now, emit the argument types (if any).
1104 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1105 ResultStr += "(";
1106 for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
1107 if (i) ResultStr += ", ";
1108 std::string ParamStr = FT->getArgType(i).getAsString(
1109 Context->PrintingPolicy);
1110 ResultStr += ParamStr;
1111 }
1112 if (FT->isVariadic()) {
1113 if (FT->getNumArgs()) ResultStr += ", ";
1114 ResultStr += "...";
1115 }
1116 ResultStr += ")";
1117 } else {
1118 ResultStr += "()";
1119 }
1120 }
1121 }
1122 void RewriteObjC::RewriteImplementationDecl(Decl *OID) {
1123 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1124 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1125
1126 InsertText(IMD ? IMD->getLocStart() : CID->getLocStart(), "// ");
1127
1128 for (ObjCCategoryImplDecl::instmeth_iterator
1129 I = IMD ? IMD->instmeth_begin() : CID->instmeth_begin(),
1130 E = IMD ? IMD->instmeth_end() : CID->instmeth_end();
1131 I != E; ++I) {
1132 std::string ResultStr;
1133 ObjCMethodDecl *OMD = *I;
1134 RewriteObjCMethodDecl(OMD, ResultStr);
1135 SourceLocation LocStart = OMD->getLocStart();
1136 SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
1137
1138 const char *startBuf = SM->getCharacterData(LocStart);
1139 const char *endBuf = SM->getCharacterData(LocEnd);
1140 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1141 }
1142
1143 for (ObjCCategoryImplDecl::classmeth_iterator
1144 I = IMD ? IMD->classmeth_begin() : CID->classmeth_begin(),
1145 E = IMD ? IMD->classmeth_end() : CID->classmeth_end();
1146 I != E; ++I) {
1147 std::string ResultStr;
1148 ObjCMethodDecl *OMD = *I;
1149 RewriteObjCMethodDecl(OMD, ResultStr);
1150 SourceLocation LocStart = OMD->getLocStart();
1151 SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
1152
1153 const char *startBuf = SM->getCharacterData(LocStart);
1154 const char *endBuf = SM->getCharacterData(LocEnd);
1155 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1156 }
1157 for (ObjCCategoryImplDecl::propimpl_iterator
1158 I = IMD ? IMD->propimpl_begin() : CID->propimpl_begin(),
1159 E = IMD ? IMD->propimpl_end() : CID->propimpl_end();
1160 I != E; ++I) {
1161 RewritePropertyImplDecl(*I, IMD, CID);
1162 }
1163
1164 InsertText(IMD ? IMD->getLocEnd() : CID->getLocEnd(), "// ");
1165 }
1166
1167 void RewriteObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1168 std::string ResultStr;
1169 if (!ObjCForwardDecls.count(ClassDecl)) {
1170 // we haven't seen a forward decl - generate a typedef.
1171 ResultStr = "#ifndef _REWRITER_typedef_";
1172 ResultStr += ClassDecl->getNameAsString();
1173 ResultStr += "\n";
1174 ResultStr += "#define _REWRITER_typedef_";
1175 ResultStr += ClassDecl->getNameAsString();
1176 ResultStr += "\n";
1177 ResultStr += "typedef struct objc_object ";
1178 ResultStr += ClassDecl->getNameAsString();
1179 ResultStr += ";\n#endif\n";
1180 // Mark this typedef as having been generated.
1181 ObjCForwardDecls.insert(ClassDecl);
1182 }
1183 SynthesizeObjCInternalStruct(ClassDecl, ResultStr);
1184
1185 for (ObjCInterfaceDecl::prop_iterator I = ClassDecl->prop_begin(),
1186 E = ClassDecl->prop_end(); I != E; ++I)
1187 RewriteProperty(*I);
1188 for (ObjCInterfaceDecl::instmeth_iterator
1189 I = ClassDecl->instmeth_begin(), E = ClassDecl->instmeth_end();
1190 I != E; ++I)
1191 RewriteMethodDeclaration(*I);
1192 for (ObjCInterfaceDecl::classmeth_iterator
1193 I = ClassDecl->classmeth_begin(), E = ClassDecl->classmeth_end();
1194 I != E; ++I)
1195 RewriteMethodDeclaration(*I);
1196
1197 // Lastly, comment out the @end.
1198 ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1199 "/* @end */");
1200 }
1201
1202 Stmt *RewriteObjC::RewritePropertySetter(BinaryOperator *BinOp, Expr *newStmt,
1203 SourceRange SrcRange) {
1204 // Synthesize a ObjCMessageExpr from a ObjCPropertyRefExpr.
1205 // This allows us to reuse all the fun and games in SynthMessageExpr().
1206 ObjCPropertyRefExpr *PropRefExpr = dyn_cast<ObjCPropertyRefExpr>(BinOp->getLHS());
1207 ObjCMessageExpr *MsgExpr;
1208 ObjCPropertyDecl *PDecl = PropRefExpr->getProperty();
1209 llvm::SmallVector<Expr *, 1> ExprVec;
1210 ExprVec.push_back(newStmt);
1211
1212 Stmt *Receiver = PropRefExpr->getBase();
1213 ObjCPropertyRefExpr *PRE = dyn_cast<ObjCPropertyRefExpr>(Receiver);
1214 if (PRE && PropGetters[PRE]) {
1215 // This allows us to handle chain/nested property getters.
1216 Receiver = PropGetters[PRE];
1217 }
1218 if (isa<ObjCSuperExpr>(Receiver))
1219 MsgExpr = ObjCMessageExpr::Create(*Context,
1220 PDecl->getType().getNonReferenceType(),
1221 /*FIXME?*/SourceLocation(),
1222 Receiver->getLocStart(),
1223 /*IsInstanceSuper=*/true,
1224 cast<Expr>(Receiver)->getType(),
1225 PDecl->getSetterName(),
1226 PDecl->getSetterMethodDecl(),
1227 &ExprVec[0], 1,
1228 /*FIXME:*/SourceLocation());
1229 else
1230 MsgExpr = ObjCMessageExpr::Create(*Context,
1231 PDecl->getType().getNonReferenceType(),
1232 /*FIXME: */SourceLocation(),
1233 cast<Expr>(Receiver),
1234 PDecl->getSetterName(),
1235 PDecl->getSetterMethodDecl(),
1236 &ExprVec[0], 1,
1237 /*FIXME:*/SourceLocation());
1238 Stmt *ReplacingStmt = SynthMessageExpr(MsgExpr);
1239
1240 // Now do the actual rewrite.
1241 ReplaceStmtWithRange(BinOp, ReplacingStmt, SrcRange);
1242 //delete BinOp;
1243 // NOTE: We don't want to call MsgExpr->Destroy(), as it holds references
1244 // to things that stay around.
1245 Context->Deallocate(MsgExpr);
1246 return ReplacingStmt;
1247 }
1248
1249 Stmt *RewriteObjC::RewritePropertyGetter(ObjCPropertyRefExpr *PropRefExpr) {
1250 // Synthesize a ObjCMessageExpr from a ObjCPropertyRefExpr.
1251 // This allows us to reuse all the fun and games in SynthMessageExpr().
1252 ObjCMessageExpr *MsgExpr;
1253 ObjCPropertyDecl *PDecl = PropRefExpr->getProperty();
1254
1255 Stmt *Receiver = PropRefExpr->getBase();
1256
1257 ObjCPropertyRefExpr *PRE = dyn_cast<ObjCPropertyRefExpr>(Receiver);
1258 if (PRE && PropGetters[PRE]) {
1259 // This allows us to handle chain/nested property getters.
1260 Receiver = PropGetters[PRE];
1261 }
1262
1263 if (isa<ObjCSuperExpr>(Receiver))
1264 MsgExpr = ObjCMessageExpr::Create(*Context,
1265 PDecl->getType().getNonReferenceType(),
1266 /*FIXME:*/SourceLocation(),
1267 Receiver->getLocStart(),
1268 /*IsInstanceSuper=*/true,
1269 cast<Expr>(Receiver)->getType(),
1270 PDecl->getGetterName(),
1271 PDecl->getGetterMethodDecl(),
1272 0, 0,
1273 /*FIXME:*/SourceLocation());
1274 else
1275 MsgExpr = ObjCMessageExpr::Create(*Context,
1276 PDecl->getType().getNonReferenceType(),
1277 /*FIXME:*/SourceLocation(),
1278 cast<Expr>(Receiver),
1279 PDecl->getGetterName(),
1280 PDecl->getGetterMethodDecl(),
1281 0, 0,
1282 /*FIXME:*/SourceLocation());
1283
1284 Stmt *ReplacingStmt = SynthMessageExpr(MsgExpr);
1285
1286 if (!PropParentMap)
1287 PropParentMap = new ParentMap(CurrentBody);
1288
1289 Stmt *Parent = PropParentMap->getParent(PropRefExpr);
1290 if (Parent && isa<ObjCPropertyRefExpr>(Parent)) {
1291 // We stash away the ReplacingStmt since actually doing the
1292 // replacement/rewrite won't work for nested getters (e.g. obj.p.i)
1293 PropGetters[PropRefExpr] = ReplacingStmt;
1294 // NOTE: We don't want to call MsgExpr->Destroy(), as it holds references
1295 // to things that stay around.
1296 Context->Deallocate(MsgExpr);
1297 return PropRefExpr; // return the original...
1298 } else {
1299 ReplaceStmt(PropRefExpr, ReplacingStmt);
1300 // delete PropRefExpr; elsewhere...
1301 // NOTE: We don't want to call MsgExpr->Destroy(), as it holds references
1302 // to things that stay around.
1303 Context->Deallocate(MsgExpr);
1304 return ReplacingStmt;
1305 }
1306 }
1307
1308 Stmt *RewriteObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV,
1309 SourceLocation OrigStart,
1310 bool &replaced) {
1311 ObjCIvarDecl *D = IV->getDecl();
1312 const Expr *BaseExpr = IV->getBase();
1313 if (CurMethodDef) {
1314 if (BaseExpr->getType()->isObjCObjectPointerType()) {
1315 ObjCInterfaceType *iFaceDecl =
1316 dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
1317 assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
1318 // lookup which class implements the instance variable.
1319 ObjCInterfaceDecl *clsDeclared = 0;
1320 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
1321 clsDeclared);
1322 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
1323
1324 // Synthesize an explicit cast to gain access to the ivar.
1325 std::string RecName = clsDeclared->getIdentifier()->getName();
1326 RecName += "_IMPL";
1327 IdentifierInfo *II = &Context->Idents.get(RecName);
1328 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
1329 SourceLocation(), II);
1330 assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
1331 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
1332 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
1333 CastExpr::CK_Unknown,
1334 IV->getBase());
1335 // Don't forget the parens to enforce the proper binding.
1336 ParenExpr *PE = new (Context) ParenExpr(IV->getBase()->getLocStart(),
1337 IV->getBase()->getLocEnd(),
1338 castExpr);
1339 replaced = true;
1340 if (IV->isFreeIvar() &&
1341 CurMethodDef->getClassInterface() == iFaceDecl->getDecl()) {
1342 MemberExpr *ME = new (Context) MemberExpr(PE, true, D,
1343 IV->getLocation(),
1344 D->getType());
1345 // delete IV; leak for now, see RewritePropertySetter() usage for more info.
1346 return ME;
1347 }
1348 // Get the new text
1349 // Cannot delete IV->getBase(), since PE points to it.
1350 // Replace the old base with the cast. This is important when doing
1351 // embedded rewrites. For example, [newInv->_container addObject:0].
1352 IV->setBase(PE);
1353 return IV;
1354 }
1355 } else { // we are outside a method.
1356 assert(!IV->isFreeIvar() && "Cannot have a free standing ivar outside a method");
1357
1358 // Explicit ivar refs need to have a cast inserted.
1359 // FIXME: consider sharing some of this code with the code above.
1360 if (BaseExpr->getType()->isObjCObjectPointerType()) {
1361 ObjCInterfaceType *iFaceDecl =
1362 dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
1363 // lookup which class implements the instance variable.
1364 ObjCInterfaceDecl *clsDeclared = 0;
1365 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
1366 clsDeclared);
1367 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
1368
1369 // Synthesize an explicit cast to gain access to the ivar.
1370 std::string RecName = clsDeclared->getIdentifier()->getName();
1371 RecName += "_IMPL";
1372 IdentifierInfo *II = &Context->Idents.get(RecName);
1373 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
1374 SourceLocation(), II);
1375 assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
1376 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
1377 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
1378 CastExpr::CK_Unknown,
1379 IV->getBase());
1380 // Don't forget the parens to enforce the proper binding.
1381 ParenExpr *PE = new (Context) ParenExpr(IV->getBase()->getLocStart(),
1382 IV->getBase()->getLocEnd(), castExpr);
1383 replaced = true;
1384 // Cannot delete IV->getBase(), since PE points to it.
1385 // Replace the old base with the cast. This is important when doing
1386 // embedded rewrites. For example, [newInv->_container addObject:0].
1387 IV->setBase(PE);
1388 return IV;
1389 }
1390 }
1391 return IV;
1392 }
1393
1394 Stmt *RewriteObjC::RewriteObjCNestedIvarRefExpr(Stmt *S, bool &replaced) {
1395 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
1396 CI != E; ++CI) {
1397 if (*CI) {
1398 Stmt *newStmt = RewriteObjCNestedIvarRefExpr(*CI, replaced);
1399 if (newStmt)
1400 *CI = newStmt;
1401 }
1402 }
1403 if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
1404 SourceRange OrigStmtRange = S->getSourceRange();
1405 Stmt *newStmt = RewriteObjCIvarRefExpr(IvarRefExpr, OrigStmtRange.getBegin(),
1406 replaced);
1407 return newStmt;
1408 }
1409 if (ObjCMessageExpr *MsgRefExpr = dyn_cast<ObjCMessageExpr>(S)) {
1410 Stmt *newStmt = SynthMessageExpr(MsgRefExpr);
1411 return newStmt;
1412 }
1413 return S;
1414 }
1415
1416 /// SynthCountByEnumWithState - To print:
1417 /// ((unsigned int (*)
1418 /// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1419 /// (void *)objc_msgSend)((id)l_collection,
1420 /// sel_registerName(
1421 /// "countByEnumeratingWithState:objects:count:"),
1422 /// &enumState,
1423 /// (id *)items, (unsigned int)16)
1424 ///
1425 void RewriteObjC::SynthCountByEnumWithState(std::string &buf) {
1426 buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
1427 "id *, unsigned int))(void *)objc_msgSend)";
1428 buf += "\n\t\t";
1429 buf += "((id)l_collection,\n\t\t";
1430 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1431 buf += "\n\t\t";
1432 buf += "&enumState, "
1433 "(id *)items, (unsigned int)16)";
1434 }
1435
1436 /// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1437 /// statement to exit to its outer synthesized loop.
1438 ///
1439 Stmt *RewriteObjC::RewriteBreakStmt(BreakStmt *S) {
1440 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1441 return S;
1442 // replace break with goto __break_label
1443 std::string buf;
1444
1445 SourceLocation startLoc = S->getLocStart();
1446 buf = "goto __break_label_";
1447 buf += utostr(ObjCBcLabelNo.back());
1448 ReplaceText(startLoc, strlen("break"), buf);
1449
1450 return 0;
1451 }
1452
1453 /// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1454 /// statement to continue with its inner synthesized loop.
1455 ///
1456 Stmt *RewriteObjC::RewriteContinueStmt(ContinueStmt *S) {
1457 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1458 return S;
1459 // replace continue with goto __continue_label
1460 std::string buf;
1461
1462 SourceLocation startLoc = S->getLocStart();
1463 buf = "goto __continue_label_";
1464 buf += utostr(ObjCBcLabelNo.back());
1465 ReplaceText(startLoc, strlen("continue"), buf);
1466
1467 return 0;
1468 }
1469
1470 /// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1471 /// It rewrites:
1472 /// for ( type elem in collection) { stmts; }
1473
1474 /// Into:
1475 /// {
1476 /// type elem;
1477 /// struct __objcFastEnumerationState enumState = { 0 };
1478 /// id items[16];
1479 /// id l_collection = (id)collection;
1480 /// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1481 /// objects:items count:16];
1482 /// if (limit) {
1483 /// unsigned long startMutations = *enumState.mutationsPtr;
1484 /// do {
1485 /// unsigned long counter = 0;
1486 /// do {
1487 /// if (startMutations != *enumState.mutationsPtr)
1488 /// objc_enumerationMutation(l_collection);
1489 /// elem = (type)enumState.itemsPtr[counter++];
1490 /// stmts;
1491 /// __continue_label: ;
1492 /// } while (counter < limit);
1493 /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
1494 /// objects:items count:16]);
1495 /// elem = nil;
1496 /// __break_label: ;
1497 /// }
1498 /// else
1499 /// elem = nil;
1500 /// }
1501 ///
1502 Stmt *RewriteObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1503 SourceLocation OrigEnd) {
1504 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
1505 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
1506 "ObjCForCollectionStmt Statement stack mismatch");
1507 assert(!ObjCBcLabelNo.empty() &&
1508 "ObjCForCollectionStmt - Label No stack empty");
1509
1510 SourceLocation startLoc = S->getLocStart();
1511 const char *startBuf = SM->getCharacterData(startLoc);
1512 const char *elementName;
1513 std::string elementTypeAsString;
1514 std::string buf;
1515 buf = "\n{\n\t";
1516 if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1517 // type elem;
1518 NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1519 QualType ElementType = cast<ValueDecl>(D)->getType();
1520 if (ElementType->isObjCQualifiedIdType() ||
1521 ElementType->isObjCQualifiedInterfaceType())
1522 // Simply use 'id' for all qualified types.
1523 elementTypeAsString = "id";
1524 else
1525 elementTypeAsString = ElementType.getAsString(Context->PrintingPolicy);
1526 buf += elementTypeAsString;
1527 buf += " ";
1528 elementName = D->getNameAsCString();
1529 buf += elementName;
1530 buf += ";\n\t";
1531 }
1532 else {
1533 DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1534 elementName = DR->getDecl()->getNameAsCString();
1535 ValueDecl *VD = cast<ValueDecl>(DR->getDecl());
1536 if (VD->getType()->isObjCQualifiedIdType() ||
1537 VD->getType()->isObjCQualifiedInterfaceType())
1538 // Simply use 'id' for all qualified types.
1539 elementTypeAsString = "id";
1540 else
1541 elementTypeAsString = VD->getType().getAsString(Context->PrintingPolicy);
1542 }
1543
1544 // struct __objcFastEnumerationState enumState = { 0 };
1545 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1546 // id items[16];
1547 buf += "id items[16];\n\t";
1548 // id l_collection = (id)
1549 buf += "id l_collection = (id)";
1550 // Find start location of 'collection' the hard way!
1551 const char *startCollectionBuf = startBuf;
1552 startCollectionBuf += 3; // skip 'for'
1553 startCollectionBuf = strchr(startCollectionBuf, '(');
1554 startCollectionBuf++; // skip '('
1555 // find 'in' and skip it.
1556 while (*startCollectionBuf != ' ' ||
1557 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1558 (*(startCollectionBuf+3) != ' ' &&
1559 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1560 startCollectionBuf++;
1561 startCollectionBuf += 3;
1562
1563 // Replace: "for (type element in" with string constructed thus far.
1564 ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1565 // Replace ')' in for '(' type elem in collection ')' with ';'
1566 SourceLocation rightParenLoc = S->getRParenLoc();
1567 const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1568 SourceLocation lparenLoc = startLoc.getFileLocWithOffset(rparenBuf-startBuf);
1569 buf = ";\n\t";
1570
1571 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1572 // objects:items count:16];
1573 // which is synthesized into:
1574 // unsigned int limit =
1575 // ((unsigned int (*)
1576 // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
1577 // (void *)objc_msgSend)((id)l_collection,
1578 // sel_registerName(
1579 // "countByEnumeratingWithState:objects:count:"),
1580 // (struct __objcFastEnumerationState *)&state,
1581 // (id *)items, (unsigned int)16);
1582 buf += "unsigned long limit =\n\t\t";
1583 SynthCountByEnumWithState(buf);
1584 buf += ";\n\t";
1585 /// if (limit) {
1586 /// unsigned long startMutations = *enumState.mutationsPtr;
1587 /// do {
1588 /// unsigned long counter = 0;
1589 /// do {
1590 /// if (startMutations != *enumState.mutationsPtr)
1591 /// objc_enumerationMutation(l_collection);
1592 /// elem = (type)enumState.itemsPtr[counter++];
1593 buf += "if (limit) {\n\t";
1594 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1595 buf += "do {\n\t\t";
1596 buf += "unsigned long counter = 0;\n\t\t";
1597 buf += "do {\n\t\t\t";
1598 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1599 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1600 buf += elementName;
1601 buf += " = (";
1602 buf += elementTypeAsString;
1603 buf += ")enumState.itemsPtr[counter++];";
1604 // Replace ')' in for '(' type elem in collection ')' with all of these.
1605 ReplaceText(lparenLoc, 1, buf);
1606
1607 /// __continue_label: ;
1608 /// } while (counter < limit);
1609 /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
1610 /// objects:items count:16]);
1611 /// elem = nil;
1612 /// __break_label: ;
1613 /// }
1614 /// else
1615 /// elem = nil;
1616 /// }
1617 ///
1618 buf = ";\n\t";
1619 buf += "__continue_label_";
1620 buf += utostr(ObjCBcLabelNo.back());
1621 buf += ": ;";
1622 buf += "\n\t\t";
1623 buf += "} while (counter < limit);\n\t";
1624 buf += "} while (limit = ";
1625 SynthCountByEnumWithState(buf);
1626 buf += ");\n\t";
1627 buf += elementName;
1628 buf += " = ((";
1629 buf += elementTypeAsString;
1630 buf += ")0);\n\t";
1631 buf += "__break_label_";
1632 buf += utostr(ObjCBcLabelNo.back());
1633 buf += ": ;\n\t";
1634 buf += "}\n\t";
1635 buf += "else\n\t\t";
1636 buf += elementName;
1637 buf += " = ((";
1638 buf += elementTypeAsString;
1639 buf += ")0);\n\t";
1640 buf += "}\n";
1641
1642 // Insert all these *after* the statement body.
1643 // FIXME: If this should support Obj-C++, support CXXTryStmt
1644 if (isa<CompoundStmt>(S->getBody())) {
1645 SourceLocation endBodyLoc = OrigEnd.getFileLocWithOffset(1);
1646 InsertText(endBodyLoc, buf);
1647 } else {
1648 /* Need to treat single statements specially. For example:
1649 *
1650 * for (A *a in b) if (stuff()) break;
1651 * for (A *a in b) xxxyy;
1652 *
1653 * The following code simply scans ahead to the semi to find the actual end.
1654 */
1655 const char *stmtBuf = SM->getCharacterData(OrigEnd);
1656 const char *semiBuf = strchr(stmtBuf, ';');
1657 assert(semiBuf && "Can't find ';'");
1658 SourceLocation endBodyLoc = OrigEnd.getFileLocWithOffset(semiBuf-stmtBuf+1);
1659 InsertText(endBodyLoc, buf);
1660 }
1661 Stmts.pop_back();
1662 ObjCBcLabelNo.pop_back();
1663 return 0;
1664 }
1665
1666 /// RewriteObjCSynchronizedStmt -
1667 /// This routine rewrites @synchronized(expr) stmt;
1668 /// into:
1669 /// objc_sync_enter(expr);
1670 /// @try stmt @finally { objc_sync_exit(expr); }
1671 ///
1672 Stmt *RewriteObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1673 // Get the start location and compute the semi location.
1674 SourceLocation startLoc = S->getLocStart();
1675 const char *startBuf = SM->getCharacterData(startLoc);
1676
1677 assert((*startBuf == '@') && "bogus @synchronized location");
1678
1679 std::string buf;
1680 buf = "objc_sync_enter((id)";
1681 const char *lparenBuf = startBuf;
1682 while (*lparenBuf != '(') lparenBuf++;
1683 ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1684 // We can't use S->getSynchExpr()->getLocEnd() to find the end location, since
1685 // the sync expression is typically a message expression that's already
1686 // been rewritten! (which implies the SourceLocation's are invalid).
1687 SourceLocation endLoc = S->getSynchBody()->getLocStart();
1688 const char *endBuf = SM->getCharacterData(endLoc);
1689 while (*endBuf != ')') endBuf--;
1690 SourceLocation rparenLoc = startLoc.getFileLocWithOffset(endBuf-startBuf);
1691 buf = ");\n";
1692 // declare a new scope with two variables, _stack and _rethrow.
1693 buf += "/* @try scope begin */ \n{ struct _objc_exception_data {\n";
1694 buf += "int buf[18/*32-bit i386*/];\n";
1695 buf += "char *pointers[4];} _stack;\n";
1696 buf += "id volatile _rethrow = 0;\n";
1697 buf += "objc_exception_try_enter(&_stack);\n";
1698 buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
1699 ReplaceText(rparenLoc, 1, buf);
1700 startLoc = S->getSynchBody()->getLocEnd();
1701 startBuf = SM->getCharacterData(startLoc);
1702
1703 assert((*startBuf == '}') && "bogus @synchronized block");
1704 SourceLocation lastCurlyLoc = startLoc;
1705 buf = "}\nelse {\n";
1706 buf += " _rethrow = objc_exception_extract(&_stack);\n";
1707 buf += "}\n";
1708 buf += "{ /* implicit finally clause */\n";
1709 buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
1710
1711 std::string syncBuf;
1712 syncBuf += " objc_sync_exit(";
1713 Expr *syncExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
1714 CastExpr::CK_Unknown,
1715 S->getSynchExpr());
1716 std::string syncExprBufS;
1717 llvm::raw_string_ostream syncExprBuf(syncExprBufS);
1718 syncExpr->printPretty(syncExprBuf, *Context, 0,
1719 PrintingPolicy(LangOpts));
1720 syncBuf += syncExprBuf.str();
1721 syncBuf += ");";
1722
1723 buf += syncBuf;
1724 buf += "\n if (_rethrow) objc_exception_throw(_rethrow);\n";
1725 buf += "}\n";
1726 buf += "}";
1727
1728 ReplaceText(lastCurlyLoc, 1, buf);
1729
1730 bool hasReturns = false;
1731 HasReturnStmts(S->getSynchBody(), hasReturns);
1732 if (hasReturns)
1733 RewriteSyncReturnStmts(S->getSynchBody(), syncBuf);
1734
1735 return 0;
1736 }
1737
1738 void RewriteObjC::WarnAboutReturnGotoStmts(Stmt *S)
1739 {
1740 // Perform a bottom up traversal of all children.
1741 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
1742 CI != E; ++CI)
1743 if (*CI)
1744 WarnAboutReturnGotoStmts(*CI);
1745
1746 if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1747 Diags.Report(Context->getFullLoc(S->getLocStart()),
1748 TryFinallyContainsReturnDiag);
1749 }
1750 return;
1751 }
1752
1753 void RewriteObjC::HasReturnStmts(Stmt *S, bool &hasReturns)
1754 {
1755 // Perform a bottom up traversal of all children.
1756 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
1757 CI != E; ++CI)
1758 if (*CI)
1759 HasReturnStmts(*CI, hasReturns);
1760
1761 if (isa<ReturnStmt>(S))
1762 hasReturns = true;
1763 return;
1764 }
1765
1766 void RewriteObjC::RewriteTryReturnStmts(Stmt *S) {
1767 // Perform a bottom up traversal of all children.
1768 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
1769 CI != E; ++CI)
1770 if (*CI) {
1771 RewriteTryReturnStmts(*CI);
1772 }
1773 if (isa<ReturnStmt>(S)) {
1774 SourceLocation startLoc = S->getLocStart();
1775 const char *startBuf = SM->getCharacterData(startLoc);
1776
1777 const char *semiBuf = strchr(startBuf, ';');
1778 assert((*semiBuf == ';') && "RewriteTryReturnStmts: can't find ';'");
1779 SourceLocation onePastSemiLoc = startLoc.getFileLocWithOffset(semiBuf-startBuf+1);
1780
1781 std::string buf;
1782 buf = "{ objc_exception_try_exit(&_stack); return";
1783
1784 ReplaceText(startLoc, 6, buf);
1785 InsertText(onePastSemiLoc, "}");
1786 }
1787 return;
1788 }
1789
1790 void RewriteObjC::RewriteSyncReturnStmts(Stmt *S, std::string syncExitBuf) {
1791 // Perform a bottom up traversal of all children.
1792 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
1793 CI != E; ++CI)
1794 if (*CI) {
1795 RewriteSyncReturnStmts(*CI, syncExitBuf);
1796 }
1797 if (isa<ReturnStmt>(S)) {
1798 SourceLocation startLoc = S->getLocStart();
1799 const char *startBuf = SM->getCharacterData(startLoc);
1800
1801 const char *semiBuf = strchr(startBuf, ';');
1802 assert((*semiBuf == ';') && "RewriteSyncReturnStmts: can't find ';'");
1803 SourceLocation onePastSemiLoc = startLoc.getFileLocWithOffset(semiBuf-startBuf+1);
1804
1805 std::string buf;
1806 buf = "{ objc_exception_try_exit(&_stack);";
1807 buf += syncExitBuf;
1808 buf += " return";
1809
1810 ReplaceText(startLoc, 6, buf);
1811 InsertText(onePastSemiLoc, "}");
1812 }
1813 return;
1814 }
1815
1816 Stmt *RewriteObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1817 // Get the start location and compute the semi location.
1818 SourceLocation startLoc = S->getLocStart();
1819 const char *startBuf = SM->getCharacterData(startLoc);
1820
1821 assert((*startBuf == '@') && "bogus @try location");
1822
1823 std::string buf;
1824 // declare a new scope with two variables, _stack and _rethrow.
1825 buf = "/* @try scope begin */ { struct _objc_exception_data {\n";
1826 buf += "int buf[18/*32-bit i386*/];\n";
1827 buf += "char *pointers[4];} _stack;\n";
1828 buf += "id volatile _rethrow = 0;\n";
1829 buf += "objc_exception_try_enter(&_stack);\n";
1830 buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
1831
1832 ReplaceText(startLoc, 4, buf);
1833
1834 startLoc = S->getTryBody()->getLocEnd();
1835 startBuf = SM->getCharacterData(startLoc);
1836
1837 assert((*startBuf == '}') && "bogus @try block");
1838
1839 SourceLocation lastCurlyLoc = startLoc;
1840 if (S->getNumCatchStmts()) {
1841 startLoc = startLoc.getFileLocWithOffset(1);
1842 buf = " /* @catch begin */ else {\n";
1843 buf += " id _caught = objc_exception_extract(&_stack);\n";
1844 buf += " objc_exception_try_enter (&_stack);\n";
1845 buf += " if (_setjmp(_stack.buf))\n";
1846 buf += " _rethrow = objc_exception_extract(&_stack);\n";
1847 buf += " else { /* @catch continue */";
1848
1849 InsertText(startLoc, buf);
1850 } else { /* no catch list */
1851 buf = "}\nelse {\n";
1852 buf += " _rethrow = objc_exception_extract(&_stack);\n";
1853 buf += "}";
1854 ReplaceText(lastCurlyLoc, 1, buf);
1855 }
1856 bool sawIdTypedCatch = false;
1857 Stmt *lastCatchBody = 0;
1858 for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
1859 ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1860 VarDecl *catchDecl = Catch->getCatchParamDecl();
1861
1862 if (I == 0)
1863 buf = "if ("; // we are generating code for the first catch clause
1864 else
1865 buf = "else if (";
1866 startLoc = Catch->getLocStart();
1867 startBuf = SM->getCharacterData(startLoc);
1868
1869 assert((*startBuf == '@') && "bogus @catch location");
1870
1871 const char *lParenLoc = strchr(startBuf, '(');
1872
1873 if (Catch->hasEllipsis()) {
1874 // Now rewrite the body...
1875 lastCatchBody = Catch->getCatchBody();
1876 SourceLocation bodyLoc = lastCatchBody->getLocStart();
1877 const char *bodyBuf = SM->getCharacterData(bodyLoc);
1878 assert(*SM->getCharacterData(Catch->getRParenLoc()) == ')' &&
1879 "bogus @catch paren location");
1880 assert((*bodyBuf == '{') && "bogus @catch body location");
1881
1882 buf += "1) { id _tmp = _caught;";
1883 Rewrite.ReplaceText(startLoc, bodyBuf-startBuf+1, buf);
1884 } else if (catchDecl) {
1885 QualType t = catchDecl->getType();
1886 if (t == Context->getObjCIdType()) {
1887 buf += "1) { ";
1888 ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
1889 sawIdTypedCatch = true;
1890 } else if (const ObjCObjectPointerType *Ptr =
1891 t->getAs<ObjCObjectPointerType>()) {
1892 // Should be a pointer to a class.
1893 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1894 if (IDecl) {
1895 buf += "objc_exception_match((struct objc_class *)objc_getClass(\"";
1896 buf += IDecl->getNameAsString();
1897 buf += "\"), (struct objc_object *)_caught)) { ";
1898 ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
1899 }
1900 }
1901 // Now rewrite the body...
1902 lastCatchBody = Catch->getCatchBody();
1903 SourceLocation rParenLoc = Catch->getRParenLoc();
1904 SourceLocation bodyLoc = lastCatchBody->getLocStart();
1905 const char *bodyBuf = SM->getCharacterData(bodyLoc);
1906 const char *rParenBuf = SM->getCharacterData(rParenLoc);
1907 assert((*rParenBuf == ')') && "bogus @catch paren location");
1908 assert((*bodyBuf == '{') && "bogus @catch body location");
1909
1910 // Here we replace ") {" with "= _caught;" (which initializes and
1911 // declares the @catch parameter).
1912 ReplaceText(rParenLoc, bodyBuf-rParenBuf+1, " = _caught;");
1913 } else {
1914 assert(false && "@catch rewrite bug");
1915 }
1916 }
1917 // Complete the catch list...
1918 if (lastCatchBody) {
1919 SourceLocation bodyLoc = lastCatchBody->getLocEnd();
1920 assert(*SM->getCharacterData(bodyLoc) == '}' &&
1921 "bogus @catch body location");
1922
1923 // Insert the last (implicit) else clause *before* the right curly brace.
1924 bodyLoc = bodyLoc.getFileLocWithOffset(-1);
1925 buf = "} /* last catch end */\n";
1926 buf += "else {\n";
1927 buf += " _rethrow = _caught;\n";
1928 buf += " objc_exception_try_exit(&_stack);\n";
1929 buf += "} } /* @catch end */\n";
1930 if (!S->getFinallyStmt())
1931 buf += "}\n";
1932 InsertText(bodyLoc, buf);
1933
1934 // Set lastCurlyLoc
1935 lastCurlyLoc = lastCatchBody->getLocEnd();
1936 }
1937 if (ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt()) {
1938 startLoc = finalStmt->getLocStart();
1939 startBuf = SM->getCharacterData(startLoc);
1940 assert((*startBuf == '@') && "bogus @finally start");
1941
1942 ReplaceText(startLoc, 8, "/* @finally */");
1943
1944 Stmt *body = finalStmt->getFinallyBody();
1945 SourceLocation startLoc = body->getLocStart();
1946 SourceLocation endLoc = body->getLocEnd();
1947 assert(*SM->getCharacterData(startLoc) == '{' &&
1948 "bogus @finally body location");
1949 assert(*SM->getCharacterData(endLoc) == '}' &&
1950 "bogus @finally body location");
1951
1952 startLoc = startLoc.getFileLocWithOffset(1);
1953 InsertText(startLoc, " if (!_rethrow) objc_exception_try_exit(&_stack);\n");
1954 endLoc = endLoc.getFileLocWithOffset(-1);
1955 InsertText(endLoc, " if (_rethrow) objc_exception_throw(_rethrow);\n");
1956
1957 // Set lastCurlyLoc
1958 lastCurlyLoc = body->getLocEnd();
1959
1960 // Now check for any return/continue/go statements within the @try.
1961 WarnAboutReturnGotoStmts(S->getTryBody());
1962 } else { /* no finally clause - make sure we synthesize an implicit one */
1963 buf = "{ /* implicit finally clause */\n";
1964 buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
1965 buf += " if (_rethrow) objc_exception_throw(_rethrow);\n";
1966 buf += "}";
1967 ReplaceText(lastCurlyLoc, 1, buf);
1968
1969 // Now check for any return/continue/go statements within the @try.
1970 // The implicit finally clause won't called if the @try contains any
1971 // jump statements.
1972 bool hasReturns = false;
1973 HasReturnStmts(S->getTryBody(), hasReturns);
1974 if (hasReturns)
1975 RewriteTryReturnStmts(S->getTryBody());
1976 }
1977 // Now emit the final closing curly brace...
1978 lastCurlyLoc = lastCurlyLoc.getFileLocWithOffset(1);
1979 InsertText(lastCurlyLoc, " } /* @try scope end */\n");
1980 return 0;
1981 }
1982
1983 // This can't be done with ReplaceStmt(S, ThrowExpr), since
1984 // the throw expression is typically a message expression that's already
1985 // been rewritten! (which implies the SourceLocation's are invalid).
1986 Stmt *RewriteObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
1987 // Get the start location and compute the semi location.
1988 SourceLocation startLoc = S->getLocStart();
1989 const char *startBuf = SM->getCharacterData(startLoc);
1990
1991 assert((*startBuf == '@') && "bogus @throw location");
1992
1993 std::string buf;
1994 /* void objc_exception_throw(id) __attribute__((noreturn)); */
1995 if (S->getThrowExpr())
1996 buf = "objc_exception_throw(";
1997 else // add an implicit argument
1998 buf = "objc_exception_throw(_caught";
1999
2000 // handle "@ throw" correctly.
2001 const char *wBuf = strchr(startBuf, 'w');
2002 assert((*wBuf == 'w') && "@throw: can't find 'w'");
2003 ReplaceText(startLoc, wBuf-startBuf+1, buf);
2004
2005 const char *semiBuf = strchr(startBuf, ';');
2006 assert((*semiBuf == ';') && "@throw: can't find ';'");
2007 SourceLocation semiLoc = startLoc.getFileLocWithOffset(semiBuf-startBuf);
2008 ReplaceText(semiLoc, 1, ");");
2009 return 0;
2010 }
2011
2012 Stmt *RewriteObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2013 // Create a new string expression.
2014 QualType StrType = Context->getPointerType(Context->CharTy);
2015 std::string StrEncoding;
2016 Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
2017 Expr *Replacement = StringLiteral::Create(*Context,StrEncoding.c_str(),
2018 StrEncoding.length(), false,StrType,
2019 SourceLocation());
2020 ReplaceStmt(Exp, Replacement);
2021
2022 // Replace this subexpr in the parent.
2023 // delete Exp; leak for now, see RewritePropertySetter() usage for more info.
2024 return Replacement;
2025 }
2026
2027 Stmt *RewriteObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2028 if (!SelGetUidFunctionDecl)
2029 SynthSelGetUidFunctionDecl();
2030 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
2031 // Create a call to sel_registerName("selName").
2032 llvm::SmallVector<Expr*, 8> SelExprs;
2033 QualType argType = Context->getPointerType(Context->CharTy);
2034 SelExprs.push_back(StringLiteral::Create(*Context,
2035 Exp->getSelector().getAsString().c_str(),
2036 Exp->getSelector().getAsString().size(),
2037 false, argType, SourceLocation()));
2038 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2039 &SelExprs[0], SelExprs.size());
2040 ReplaceStmt(Exp, SelExp);
2041 // delete Exp; leak for now, see RewritePropertySetter() usage for more info.
2042 return SelExp;
2043 }
2044
2045 CallExpr *RewriteObjC::SynthesizeCallToFunctionDecl(
2046 FunctionDecl *FD, Expr **args, unsigned nargs, SourceLocation StartLoc,
2047 SourceLocation EndLoc) {
2048 // Get the type, we will need to reference it in a couple spots.
2049 QualType msgSendType = FD->getType();
2050
2051 // Create a reference to the objc_msgSend() declaration.
2052 DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, msgSendType, SourceLocation());
2053
2054 // Now, we cast the reference to a pointer to the objc_msgSend type.
2055 QualType pToFunc = Context->getPointerType(msgSendType);
2056 ImplicitCastExpr *ICE =
2057 ImplicitCastExpr::Create(*Context, pToFunc, CastExpr::CK_Unknown,
2058 DRE, 0, ImplicitCastExpr::RValue);
2059
2060 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2061
2062 CallExpr *Exp =
2063 new (Context) CallExpr(*Context, ICE, args, nargs,
2064 FT->getCallResultType(*Context), EndLoc);
2065 return Exp;
2066 }
2067
2068 static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2069 const char *&startRef, const char *&endRef) {
2070 while (startBuf < endBuf) {
2071 if (*startBuf == '<')
2072 startRef = startBuf; // mark the start.
2073 if (*startBuf == '>') {
2074 if (startRef && *startRef == '<') {
2075 endRef = startBuf; // mark the end.
2076 return true;
2077 }
2078 return false;
2079 }
2080 startBuf++;
2081 }
2082 return false;
2083 }
2084
2085 static void scanToNextArgument(const char *&argRef) {
2086 int angle = 0;
2087 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2088 if (*argRef == '<')
2089 angle++;
2090 else if (*argRef == '>')
2091 angle--;
2092 argRef++;
2093 }
2094 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
2095 }
2096
2097 bool RewriteObjC::needToScanForQualifiers(QualType T) {
2098 if (T->isObjCQualifiedIdType())
2099 return true;
2100 if (const PointerType *PT = T->getAs<PointerType>()) {
2101 if (PT->getPointeeType()->isObjCQualifiedIdType())
2102 return true;
2103 }
2104 if (T->isObjCObjectPointerType()) {
2105 T = T->getPointeeType();
2106 return T->isObjCQualifiedInterfaceType();
2107 }
2108 return false;
2109 }
2110
2111 void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2112 QualType Type = E->getType();
2113 if (needToScanForQualifiers(Type)) {
2114 SourceLocation Loc, EndLoc;
2115
2116 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2117 Loc = ECE->getLParenLoc();
2118 EndLoc = ECE->getRParenLoc();
2119 } else {
2120 Loc = E->getLocStart();
2121 EndLoc = E->getLocEnd();
2122 }
2123 // This will defend against trying to rewrite synthesized expressions.
2124 if (Loc.isInvalid() || EndLoc.isInvalid())
2125 return;
2126
2127 const char *startBuf = SM->getCharacterData(Loc);
2128 const char *endBuf = SM->getCharacterData(EndLoc);
2129 const char *startRef = 0, *endRef = 0;
2130 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2131 // Get the locations of the startRef, endRef.
2132 SourceLocation LessLoc = Loc.getFileLocWithOffset(startRef-startBuf);
2133 SourceLocation GreaterLoc = Loc.getFileLocWithOffset(endRef-startBuf+1);
2134 // Comment out the protocol references.
2135 InsertText(LessLoc, "/*");
2136 InsertText(GreaterLoc, "*/");
2137 }
2138 }
2139 }
2140
2141 void RewriteObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2142 SourceLocation Loc;
2143 QualType Type;
2144 const FunctionProtoType *proto = 0;
2145 if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2146 Loc = VD->getLocation();
2147 Type = VD->getType();
2148 }
2149 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2150 Loc = FD->getLocation();
2151 // Check for ObjC 'id' and class types that have been adorned with protocol
2152 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2153 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2154 assert(funcType && "missing function type");
2155 proto = dyn_cast<FunctionProtoType>(funcType);
2156 if (!proto)
2157 return;
2158 Type = proto->getResultType();
2159 }
2160 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2161 Loc = FD->getLocation();
2162 Type = FD->getType();
2163 }
2164 else
2165 return;
2166
2167 if (needToScanForQualifiers(Type)) {
2168 // Since types are unique, we need to scan the buffer.
2169
2170 const char *endBuf = SM->getCharacterData(Loc);
2171 const char *startBuf = endBuf;
2172 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2173 startBuf--; // scan backward (from the decl location) for return type.
2174 const char *startRef = 0, *endRef = 0;
2175 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2176 // Get the locations of the startRef, endRef.
2177 SourceLocation LessLoc = Loc.getFileLocWithOffset(startRef-endBuf);
2178 SourceLocation GreaterLoc = Loc.getFileLocWithOffset(endRef-endBuf+1);
2179 // Comment out the protocol references.
2180 InsertText(LessLoc, "/*");
2181 InsertText(GreaterLoc, "*/");
2182 }
2183 }
2184 if (!proto)
2185 return; // most likely, was a variable
2186 // Now check arguments.
2187 const char *startBuf = SM->getCharacterData(Loc);
2188 const char *startFuncBuf = startBuf;
2189 for (unsigned i = 0; i < proto->getNumArgs(); i++) {
2190 if (needToScanForQualifiers(proto->getArgType(i))) {
2191 // Since types are unique, we need to scan the buffer.
2192
2193 const char *endBuf = startBuf;
2194 // scan forward (from the decl location) for argument types.
2195 scanToNextArgument(endBuf);
2196 const char *startRef = 0, *endRef = 0;
2197 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2198 // Get the locations of the startRef, endRef.
2199 SourceLocation LessLoc =
2200 Loc.getFileLocWithOffset(startRef-startFuncBuf);
2201 SourceLocation GreaterLoc =
2202 Loc.getFileLocWithOffset(endRef-startFuncBuf+1);
2203 // Comment out the protocol references.
2204 InsertText(LessLoc, "/*");
2205 InsertText(GreaterLoc, "*/");
2206 }
2207 startBuf = ++endBuf;
2208 }
2209 else {
2210 // If the function name is derived from a macro expansion, then the
2211 // argument buffer will not follow the name. Need to speak with Chris.
2212 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2213 startBuf++; // scan forward (from the decl location) for argument types.
2214 startBuf++;
2215 }
2216 }
2217 }
2218
2219 void RewriteObjC::RewriteTypeOfDecl(VarDecl *ND) {
2220 QualType QT = ND->getType();
2221 const Type* TypePtr = QT->getAs<Type>();
2222 if (!isa<TypeOfExprType>(TypePtr))
2223 return;
2224 while (isa<TypeOfExprType>(TypePtr)) {
2225 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2226 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2227 TypePtr = QT->getAs<Type>();
2228 }
2229 // FIXME. This will not work for multiple declarators; as in:
2230 // __typeof__(a) b,c,d;
2231 std::string TypeAsString(QT.getAsString(Context->PrintingPolicy));
2232 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2233 const char *startBuf = SM->getCharacterData(DeclLoc);
2234 if (ND->getInit()) {
2235 std::string Name(ND->getNameAsString());
2236 TypeAsString += " " + Name + " = ";
2237 Expr *E = ND->getInit();
2238 SourceLocation startLoc;
2239 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2240 startLoc = ECE->getLParenLoc();
2241 else
2242 startLoc = E->getLocStart();
2243 startLoc = SM->getInstantiationLoc(startLoc);
2244 const char *endBuf = SM->getCharacterData(startLoc);
2245 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2246 }
2247 else {
2248 SourceLocation X = ND->getLocEnd();
2249 X = SM->getInstantiationLoc(X);
2250 const char *endBuf = SM->getCharacterData(X);
2251 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2252 }
2253 }
2254
2255 // SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2256 void RewriteObjC::SynthSelGetUidFunctionDecl() {
2257 IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2258 llvm::SmallVector<QualType, 16> ArgTys;
2259 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2260 QualType getFuncType = Context->getFunctionType(Context->getObjCSelType(),
2261 &ArgTys[0], ArgTys.size(),
2262 false /*isVariadic*/, 0,
2263 false, false, 0, 0,
2264 FunctionType::ExtInfo());
2265 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2266 SourceLocation(),
2267 SelGetUidIdent, getFuncType, 0,
2268 FunctionDecl::Extern,
2269 FunctionDecl::None, false);
2270 }
2271
2272 void RewriteObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2273 // declared in <objc/objc.h>
2274 if (FD->getIdentifier() &&
2275 strcmp(FD->getNameAsCString(), "sel_registerName") == 0) {
2276 SelGetUidFunctionDecl = FD;
2277 return;
2278 }
2279 RewriteObjCQualifiedInterfaceTypes(FD);
2280 }
2281
2282 void RewriteObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2283 std::string TypeString(Type.getAsString(Context->PrintingPolicy));
2284 const char *argPtr = TypeString.c_str();
2285 if (!strchr(argPtr, '^')) {
2286 Str += TypeString;
2287 return;
2288 }
2289 while (*argPtr) {
2290 Str += (*argPtr == '^' ? '*' : *argPtr);
2291 argPtr++;
2292 }
2293 }
2294
2295 // FIXME. Consolidate this routine with RewriteBlockPointerType.
2296 void RewriteObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2297 ValueDecl *VD) {
2298 QualType Type = VD->getType();
2299 std::string TypeString(Type.getAsString(Context->PrintingPolicy));
2300 const char *argPtr = TypeString.c_str();
2301 int paren = 0;
2302 while (*argPtr) {
2303 switch (*argPtr) {
2304 case '(':
2305 Str += *argPtr;
2306 paren++;
2307 break;
2308 case ')':
2309 Str += *argPtr;
2310 paren--;
2311 break;
2312 case '^':
2313 Str += '*';
2314 if (paren == 1)
2315 Str += VD->getNameAsString();
2316 break;
2317 default:
2318 Str += *argPtr;
2319 break;
2320 }
2321 argPtr++;
2322 }
2323 }
2324
2325
2326 void RewriteObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2327 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2328 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2329 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2330 if (!proto)
2331 return;
2332 QualType Type = proto->getResultType();
2333 std::string FdStr = Type.getAsString(Context->PrintingPolicy);
2334 FdStr += " ";
2335 FdStr += FD->getNameAsCString();
2336 FdStr += "(";
2337 unsigned numArgs = proto->getNumArgs();
2338 for (unsigned i = 0; i < numArgs; i++) {
2339 QualType ArgType = proto->getArgType(i);
2340 RewriteBlockPointerType(FdStr, ArgType);
2341 if (i+1 < numArgs)
2342 FdStr += ", ";
2343 }
2344 FdStr += ");\n";
2345 InsertText(FunLocStart, FdStr);
2346 CurFunctionDeclToDeclareForBlock = 0;
2347 }
2348
2349 // SynthSuperContructorFunctionDecl - id objc_super(id obj, id super);
2350 void RewriteObjC::SynthSuperContructorFunctionDecl() {
2351 if (SuperContructorFunctionDecl)
2352 return;
2353 IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2354 llvm::SmallVector<QualType, 16> ArgTys;
2355 QualType argT = Context->getObjCIdType();
2356 assert(!argT.isNull() && "Can't find 'id' type");
2357 ArgTys.push_back(argT);
2358 ArgTys.push_back(argT);
2359 QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(),
2360 &ArgTys[0], ArgTys.size(),
2361 false, 0,
2362 false, false, 0, 0,
2363 FunctionType::ExtInfo());
2364 SuperContructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2365 SourceLocation(),
2366 msgSendIdent, msgSendType, 0,
2367 FunctionDecl::Extern,
2368 FunctionDecl::None, false);
2369 }
2370
2371 // SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2372 void RewriteObjC::SynthMsgSendFunctionDecl() {
2373 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2374 llvm::SmallVector<QualType, 16> ArgTys;
2375 QualType argT = Context->getObjCIdType();
2376 assert(!argT.isNull() && "Can't find 'id' type");
2377 ArgTys.push_back(argT);
2378 argT = Context->getObjCSelType();
2379 assert(!argT.isNull() && "Can't find 'SEL' type");
2380 ArgTys.push_back(argT);
2381 QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(),
2382 &ArgTys[0], ArgTys.size(),
2383 true /*isVariadic*/, 0,
2384 false, false, 0, 0,
2385 FunctionType::ExtInfo());
2386 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2387 SourceLocation(),
2388 msgSendIdent, msgSendType, 0,
2389 FunctionDecl::Extern,
2390 FunctionDecl::None, false);
2391 }
2392
2393 // SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...);
2394 void RewriteObjC::SynthMsgSendSuperFunctionDecl() {
2395 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2396 llvm::SmallVector<QualType, 16> ArgTys;
2397 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2398 SourceLocation(),
2399 &Context->Idents.get("objc_super"));
2400 QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
2401 assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
2402 ArgTys.push_back(argT);
2403 argT = Context->getObjCSelType();
2404 assert(!argT.isNull() && "Can't find 'SEL' type");
2405 ArgTys.push_back(argT);
2406 QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(),
2407 &ArgTys[0], ArgTys.size(),
2408 true /*isVariadic*/, 0,
2409 false, false, 0, 0,
2410 FunctionType::ExtInfo());
2411 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2412 SourceLocation(),
2413 msgSendIdent, msgSendType, 0,
2414 FunctionDecl::Extern,
2415 FunctionDecl::None, false);
2416 }
2417
2418 // SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2419 void RewriteObjC::SynthMsgSendStretFunctionDecl() {
2420 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2421 llvm::SmallVector<QualType, 16> ArgTys;
2422 QualType argT = Context->getObjCIdType();
2423 assert(!argT.isNull() && "Can't find 'id' type");
2424 ArgTys.push_back(argT);
2425 argT = Context->getObjCSelType();
2426 assert(!argT.isNull() && "Can't find 'SEL' type");
2427 ArgTys.push_back(argT);
2428 QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(),
2429 &ArgTys[0], ArgTys.size(),
2430 true /*isVariadic*/, 0,
2431 false, false, 0, 0,
2432 FunctionType::ExtInfo());
2433 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2434 SourceLocation(),
2435 msgSendIdent, msgSendType, 0,
2436 FunctionDecl::Extern,
2437 FunctionDecl::None, false);
2438 }
2439
2440 // SynthMsgSendSuperStretFunctionDecl -
2441 // id objc_msgSendSuper_stret(struct objc_super *, SEL op, ...);
2442 void RewriteObjC::SynthMsgSendSuperStretFunctionDecl() {
2443 IdentifierInfo *msgSendIdent =
2444 &Context->Idents.get("objc_msgSendSuper_stret");
2445 llvm::SmallVector<QualType, 16> ArgTys;
2446 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2447 SourceLocation(),
2448 &Context->Idents.get("objc_super"));
2449 QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
2450 assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
2451 ArgTys.push_back(argT);
2452 argT = Context->getObjCSelType();
2453 assert(!argT.isNull() && "Can't find 'SEL' type");
2454 ArgTys.push_back(argT);
2455 QualType msgSendType = Context->getFunctionType(Context->getObjCIdType(),
2456 &ArgTys[0], ArgTys.size(),
2457 true /*isVariadic*/, 0,
2458 false, false, 0, 0,
2459 FunctionType::ExtInfo());
2460 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2461 SourceLocation(),
2462 msgSendIdent, msgSendType, 0,
2463 FunctionDecl::Extern,
2464 FunctionDecl::None, false);
2465 }
2466
2467 // SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2468 void RewriteObjC::SynthMsgSendFpretFunctionDecl() {
2469 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2470 llvm::SmallVector<QualType, 16> ArgTys;
2471 QualType argT = Context->getObjCIdType();
2472 assert(!argT.isNull() && "Can't find 'id' type");
2473 ArgTys.push_back(argT);
2474 argT = Context->getObjCSelType();
2475 assert(!argT.isNull() && "Can't find 'SEL' type");
2476 ArgTys.push_back(argT);
2477 QualType msgSendType = Context->getFunctionType(Context->DoubleTy,
2478 &ArgTys[0], ArgTys.size(),
2479 true /*isVariadic*/, 0,
2480 false, false, 0, 0,
2481 FunctionType::ExtInfo());
2482 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2483 SourceLocation(),
2484 msgSendIdent, msgSendType, 0,
2485 FunctionDecl::Extern,
2486 FunctionDecl::None, false);
2487 }
2488
2489 // SynthGetClassFunctionDecl - id objc_getClass(const char *name);
2490 void RewriteObjC::SynthGetClassFunctionDecl() {
2491 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2492 llvm::SmallVector<QualType, 16> ArgTys;
2493 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2494 QualType getClassType = Context->getFunctionType(Context->getObjCIdType(),
2495 &ArgTys[0], ArgTys.size(),
2496 false /*isVariadic*/, 0,
2497 false, false, 0, 0,
2498 FunctionType::ExtInfo());
2499 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2500 SourceLocation(),
2501 getClassIdent, getClassType, 0,
2502 FunctionDecl::Extern,
2503 FunctionDecl::None, false);
2504 }
2505
2506 // SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2507 void RewriteObjC::SynthGetSuperClassFunctionDecl() {
2508 IdentifierInfo *getSuperClassIdent =
2509 &Context->Idents.get("class_getSuperclass");
2510 llvm::SmallVector<QualType, 16> ArgTys;
2511 ArgTys.push_back(Context->getObjCClassType());
2512 QualType getClassType = Context->getFunctionType(Context->getObjCClassType(),
2513 &ArgTys[0], ArgTys.size(),
2514 false /*isVariadic*/, 0,
2515 false, false, 0, 0,
2516 FunctionType::ExtInfo());
2517 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2518 SourceLocation(),
2519 getSuperClassIdent,
2520 getClassType, 0,
2521 FunctionDecl::Extern,
2522 FunctionDecl::None,
2523 false);
2524 }
2525
2526 // SynthGetMetaClassFunctionDecl - id objc_getClass(const char *name);
2527 void RewriteObjC::SynthGetMetaClassFunctionDecl() {
2528 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2529 llvm::SmallVector<QualType, 16> ArgTys;
2530 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2531 QualType getClassType = Context->getFunctionType(Context->getObjCIdType(),
2532 &ArgTys[0], ArgTys.size(),
2533 false /*isVariadic*/, 0,
2534 false, false, 0, 0,
2535 FunctionType::ExtInfo());
2536 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2537 SourceLocation(),
2538 getClassIdent, getClassType, 0,
2539 FunctionDecl::Extern,
2540 FunctionDecl::None, false);
2541 }
2542
2543 Stmt *RewriteObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2544 QualType strType = getConstantStringStructType();
2545
2546 std::string S = "__NSConstantStringImpl_";
2547
2548 std::string tmpName = InFileName;
2549 unsigned i;
2550 for (i=0; i < tmpName.length(); i++) {
2551 char c = tmpName.at(i);
2552 // replace any non alphanumeric characters with '_'.
2553 if (!isalpha(c) && (c < '0' || c > '9'))
2554 tmpName[i] = '_';
2555 }
2556 S += tmpName;
2557 S += "_";
2558 S += utostr(NumObjCStringLiterals++);
2559
2560 Preamble += "static __NSConstantStringImpl " + S;
2561 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2562 Preamble += "0x000007c8,"; // utf8_str
2563 // The pretty printer for StringLiteral handles escape characters properly.
2564 std::string prettyBufS;
2565 llvm::raw_string_ostream prettyBuf(prettyBufS);
2566 Exp->getString()->printPretty(prettyBuf, *Context, 0,
2567 PrintingPolicy(LangOpts));
2568 Preamble += prettyBuf.str();
2569 Preamble += ",";
2570 Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2571
2572 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2573 &Context->Idents.get(S), strType, 0,
2574 VarDecl::Static, VarDecl::None);
2575 DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, strType, SourceLocation());
2576 Expr *Unop = new (Context) UnaryOperator(DRE, UnaryOperator::AddrOf,
2577 Context->getPointerType(DRE->getType()),
2578 SourceLocation());
2579 // cast to NSConstantString *
2580 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2581 CastExpr::CK_Unknown, Unop);
2582 ReplaceStmt(Exp, cast);
2583 // delete Exp; leak for now, see RewritePropertySetter() usage for more info.
2584 return cast;
2585 }
2586
2587 // struct objc_super { struct objc_object *receiver; struct objc_class *super; };
2588 QualType RewriteObjC::getSuperStructType() {
2589 if (!SuperStructDecl) {
2590 SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2591 SourceLocation(),
2592 &Context->Idents.get("objc_super"));
2593 QualType FieldTypes[2];
2594
2595 // struct objc_object *receiver;
2596 FieldTypes[0] = Context->getObjCIdType();
2597 // struct objc_class *super;
2598 FieldTypes[1] = Context->getObjCClassType();
2599
2600 // Create fields
2601 for (unsigned i = 0; i < 2; ++i) {
2602 SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2603 SourceLocation(), 0,
2604 FieldTypes[i], 0,
2605 /*BitWidth=*/0,
2606 /*Mutable=*/false));
2607 }
2608
2609 SuperStructDecl->completeDefinition();
2610 }
2611 return Context->getTagDeclType(SuperStructDecl);
2612 }
2613
2614 QualType RewriteObjC::getConstantStringStructType() {
2615 if (!ConstantStringDecl) {
2616 ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2617 SourceLocation(),
2618 &Context->Idents.get("__NSConstantStringImpl"));
2619 QualType FieldTypes[4];
2620
2621 // struct objc_object *receiver;
2622 FieldTypes[0] = Context->getObjCIdType();
2623 // int flags;
2624 FieldTypes[1] = Context->IntTy;
2625 // char *str;
2626 FieldTypes[2] = Context->getPointerType(Context->CharTy);
2627 // long length;
2628 FieldTypes[3] = Context->LongTy;
2629
2630 // Create fields
2631 for (unsigned i = 0; i < 4; ++i) {
2632 ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
2633 ConstantStringDecl,
2634 SourceLocation(), 0,
2635 FieldTypes[i], 0,
2636 /*BitWidth=*/0,
2637 /*Mutable=*/true));
2638 }
2639
2640 ConstantStringDecl->completeDefinition();
2641 }
2642 return Context->getTagDeclType(ConstantStringDecl);
2643 }
2644
2645 Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
2646 SourceLocation StartLoc,
2647 SourceLocation EndLoc) {
2648 if (!SelGetUidFunctionDecl)
2649 SynthSelGetUidFunctionDecl();
2650 if (!MsgSendFunctionDecl)
2651 SynthMsgSendFunctionDecl();
2652 if (!MsgSendSuperFunctionDecl)
2653 SynthMsgSendSuperFunctionDecl();
2654 if (!MsgSendStretFunctionDecl)
2655 SynthMsgSendStretFunctionDecl();
2656 if (!MsgSendSuperStretFunctionDecl)
2657 SynthMsgSendSuperStretFunctionDecl();
2658 if (!MsgSendFpretFunctionDecl)
2659 SynthMsgSendFpretFunctionDecl();
2660 if (!GetClassFunctionDecl)
2661 SynthGetClassFunctionDecl();
2662 if (!GetSuperClassFunctionDecl)
2663 SynthGetSuperClassFunctionDecl();
2664 if (!GetMetaClassFunctionDecl)
2665 SynthGetMetaClassFunctionDecl();
2666
2667 // default to objc_msgSend().
2668 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2669 // May need to use objc_msgSend_stret() as well.
2670 FunctionDecl *MsgSendStretFlavor = 0;
2671 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
2672 QualType resultType = mDecl->getResultType();
2673 if (resultType->isRecordType())
2674 MsgSendStretFlavor = MsgSendStretFunctionDecl;
2675 else if (resultType->isRealFloatingType())
2676 MsgSendFlavor = MsgSendFpretFunctionDecl;
2677 }
2678
2679 // Synthesize a call to objc_msgSend().
2680 llvm::SmallVector<Expr*, 8> MsgExprs;
2681 switch (Exp->getReceiverKind()) {
2682 case ObjCMessageExpr::SuperClass: {
2683 MsgSendFlavor = MsgSendSuperFunctionDecl;
2684 if (MsgSendStretFlavor)
2685 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
2686 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
2687
2688 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
2689
2690 llvm::SmallVector<Expr*, 4> InitExprs;
2691
2692 // set the receiver to self, the first argument to all methods.
2693 InitExprs.push_back(
2694 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2695 CastExpr::CK_Unknown,
2696 new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
2697 Context->getObjCIdType(),
2698 SourceLocation()))
2699 ); // set the 'receiver'.
2700
2701 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2702 llvm::SmallVector<Expr*, 8> ClsExprs;
2703 QualType argType = Context->getPointerType(Context->CharTy);
2704 ClsExprs.push_back(StringLiteral::Create(*Context,
2705 ClassDecl->getIdentifier()->getNameStart(),
2706 ClassDecl->getIdentifier()->getLength(),
2707 false, argType, SourceLocation()));
2708 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
2709 &ClsExprs[0],
2710 ClsExprs.size(),
2711 StartLoc,
2712 EndLoc);
2713 // (Class)objc_getClass("CurrentClass")
2714 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
2715 Context->getObjCClassType(),
2716 CastExpr::CK_Unknown, Cls);
2717 ClsExprs.clear();
2718 ClsExprs.push_back(ArgExpr);
2719 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
2720 &ClsExprs[0], ClsExprs.size(),
2721 StartLoc, EndLoc);
2722
2723 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2724 // To turn off a warning, type-cast to 'id'
2725 InitExprs.push_back( // set 'super class', using class_getSuperclass().
2726 NoTypeInfoCStyleCastExpr(Context,
2727 Context->getObjCIdType(),
2728 CastExpr::CK_Unknown, Cls));
2729 // struct objc_super
2730 QualType superType = getSuperStructType();
2731 Expr *SuperRep;
2732
2733 if (LangOpts.Microsoft) {
2734 SynthSuperContructorFunctionDecl();
2735 // Simulate a contructor call...
2736 DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
2737 superType, SourceLocation());
2738 SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
2739 InitExprs.size(),
2740 superType, SourceLocation());
2741 // The code for super is a little tricky to prevent collision with
2742 // the structure definition in the header. The rewriter has it's own
2743 // internal definition (__rw_objc_super) that is uses. This is why
2744 // we need the cast below. For example:
2745 // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
2746 //
2747 SuperRep = new (Context) UnaryOperator(SuperRep, UnaryOperator::AddrOf,
2748 Context->getPointerType(SuperRep->getType()),
2749 SourceLocation());
2750 SuperRep = NoTypeInfoCStyleCastExpr(Context,
2751 Context->getPointerType(superType),
2752 CastExpr::CK_Unknown, SuperRep);
2753 } else {
2754 // (struct objc_super) { <exprs from above> }
2755 InitListExpr *ILE =
2756 new (Context) InitListExpr(*Context, SourceLocation(),
2757 &InitExprs[0], InitExprs.size(),
2758 SourceLocation());
2759 TypeSourceInfo *superTInfo
2760 = Context->getTrivialTypeSourceInfo(superType);
2761 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
2762 superType, ILE, false);
2763 // struct objc_super *
2764 SuperRep = new (Context) UnaryOperator(SuperRep, UnaryOperator::AddrOf,
2765 Context->getPointerType(SuperRep->getType()),
2766 SourceLocation());
2767 }
2768 MsgExprs.push_back(SuperRep);
2769 break;
2770 }
2771
2772 case ObjCMessageExpr::Class: {
2773 llvm::SmallVector<Expr*, 8> ClsExprs;
2774 QualType argType = Context->getPointerType(Context->CharTy);
2775 ObjCInterfaceDecl *Class
2776 = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
2777 IdentifierInfo *clsName = Class->getIdentifier();
2778 ClsExprs.push_back(StringLiteral::Create(*Context,
2779 clsName->getNameStart(),
2780 clsName->getLength(),
2781 false, argType,
2782 SourceLocation()));
2783 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
2784 &ClsExprs[0],
2785 ClsExprs.size(),
2786 StartLoc, EndLoc);
2787 MsgExprs.push_back(Cls);
2788 break;
2789 }
2790
2791 case ObjCMessageExpr::SuperInstance:{
2792 MsgSendFlavor = MsgSendSuperFunctionDecl;
2793 if (MsgSendStretFlavor)
2794 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
2795 assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
2796 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
2797 llvm::SmallVector<Expr*, 4> InitExprs;
2798
2799 InitExprs.push_back(
2800 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2801 CastExpr::CK_Unknown,
2802 new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
2803 Context->getObjCIdType(),
2804 SourceLocation()))
2805 ); // set the 'receiver'.
2806
2807 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2808 llvm::SmallVector<Expr*, 8> ClsExprs;
2809 QualType argType = Context->getPointerType(Context->CharTy);
2810 ClsExprs.push_back(StringLiteral::Create(*Context,
2811 ClassDecl->getIdentifier()->getNameStart(),
2812 ClassDecl->getIdentifier()->getLength(),
2813 false, argType, SourceLocation()));
2814 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
2815 &ClsExprs[0],
2816 ClsExprs.size(),
2817 StartLoc, EndLoc);
2818 // (Class)objc_getClass("CurrentClass")
2819 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
2820 Context->getObjCClassType(),
2821 CastExpr::CK_Unknown, Cls);
2822 ClsExprs.clear();
2823 ClsExprs.push_back(ArgExpr);
2824 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
2825 &ClsExprs[0], ClsExprs.size(),
2826 StartLoc, EndLoc);
2827
2828 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
2829 // To turn off a warning, type-cast to 'id'
2830 InitExprs.push_back(
2831 // set 'super class', using class_getSuperclass().
2832 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2833 CastExpr::CK_Unknown, Cls));
2834 // struct objc_super
2835 QualType superType = getSuperStructType();
2836 Expr *SuperRep;
2837
2838 if (LangOpts.Microsoft) {
2839 SynthSuperContructorFunctionDecl();
2840 // Simulate a contructor call...
2841 DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
2842 superType, SourceLocation());
2843 SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
2844 InitExprs.size(),
2845 superType, SourceLocation());
2846 // The code for super is a little tricky to prevent collision with
2847 // the structure definition in the header. The rewriter has it's own
2848 // internal definition (__rw_objc_super) that is uses. This is why
2849 // we need the cast below. For example:
2850 // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
2851 //
2852 SuperRep = new (Context) UnaryOperator(SuperRep, UnaryOperator::AddrOf,
2853 Context->getPointerType(SuperRep->getType()),
2854 SourceLocation());
2855 SuperRep = NoTypeInfoCStyleCastExpr(Context,
2856 Context->getPointerType(superType),
2857 CastExpr::CK_Unknown, SuperRep);
2858 } else {
2859 // (struct objc_super) { <exprs from above> }
2860 InitListExpr *ILE =
2861 new (Context) InitListExpr(*Context, SourceLocation(),
2862 &InitExprs[0], InitExprs.size(),
2863 SourceLocation());
2864 TypeSourceInfo *superTInfo
2865 = Context->getTrivialTypeSourceInfo(superType);
2866 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
2867 superType, ILE, false);
2868 }
2869 MsgExprs.push_back(SuperRep);
2870 break;
2871 }
2872
2873 case ObjCMessageExpr::Instance: {
2874 // Remove all type-casts because it may contain objc-style types; e.g.
2875 // Foo<Proto> *.
2876 Expr *recExpr = Exp->getInstanceReceiver();
2877 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
2878 recExpr = CE->getSubExpr();
2879 recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2880 CastExpr::CK_Unknown, recExpr);
2881 MsgExprs.push_back(recExpr);
2882 break;
2883 }
2884 }
2885
2886 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
2887 llvm::SmallVector<Expr*, 8> SelExprs;
2888 QualType argType = Context->getPointerType(Context->CharTy);
2889 SelExprs.push_back(StringLiteral::Create(*Context,
2890 Exp->getSelector().getAsString().c_str(),
2891 Exp->getSelector().getAsString().size(),
2892 false, argType, SourceLocation()));
2893 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2894 &SelExprs[0], SelExprs.size(),
2895 StartLoc,
2896 EndLoc);
2897 MsgExprs.push_back(SelExp);
2898
2899 // Now push any user supplied arguments.
2900 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
2901 Expr *userExpr = Exp->getArg(i);
2902 // Make all implicit casts explicit...ICE comes in handy:-)
2903 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
2904 // Reuse the ICE type, it is exactly what the doctor ordered.
2905 QualType type = ICE->getType()->isObjCQualifiedIdType()
2906 ? Context->getObjCIdType()
2907 : ICE->getType();
2908 // Make sure we convert "type (^)(...)" to "type (*)(...)".
2909 (void)convertBlockPointerToFunctionPointer(type);
2910 userExpr = NoTypeInfoCStyleCastExpr(Context, type, CastExpr::CK_Unknown,
2911 userExpr);
2912 }
2913 // Make id<P...> cast into an 'id' cast.
2914 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
2915 if (CE->getType()->isObjCQualifiedIdType()) {
2916 while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
2917 userExpr = CE->getSubExpr();
2918 userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
2919 CastExpr::CK_Unknown, userExpr);
2920 }
2921 }
2922 MsgExprs.push_back(userExpr);
2923 // We've transferred the ownership to MsgExprs. For now, we *don't* null
2924 // out the argument in the original expression (since we aren't deleting
2925 // the ObjCMessageExpr). See RewritePropertySetter() usage for more info.
2926 //Exp->setArg(i, 0);
2927 }
2928 // Generate the funky cast.
2929 CastExpr *cast;
2930 llvm::SmallVector<QualType, 8> ArgTypes;
2931 QualType returnType;
2932
2933 // Push 'id' and 'SEL', the 2 implicit arguments.
2934 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
2935 ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
2936 else
2937 ArgTypes.push_back(Context->getObjCIdType());
2938 ArgTypes.push_back(Context->getObjCSelType());
2939 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
2940 // Push any user argument types.
2941 for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
2942 E = OMD->param_end(); PI != E; ++PI) {
2943 QualType t = (*PI)->getType()->isObjCQualifiedIdType()
2944 ? Context->getObjCIdType()
2945 : (*PI)->getType();
2946 // Make sure we convert "t (^)(...)" to "t (*)(...)".
2947 (void)convertBlockPointerToFunctionPointer(t);
2948 ArgTypes.push_back(t);
2949 }
2950 returnType = OMD->getResultType()->isObjCQualifiedIdType()
2951 ? Context->getObjCIdType() : OMD->getResultType();
2952 (void)convertBlockPointerToFunctionPointer(returnType);
2953 } else {
2954 returnType = Context->getObjCIdType();
2955 }
2956 // Get the type, we will need to reference it in a couple spots.
2957 QualType msgSendType = MsgSendFlavor->getType();
2958
2959 // Create a reference to the objc_msgSend() declaration.
2960 DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, msgSendType,
2961 SourceLocation());
2962
2963 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
2964 // If we don't do this cast, we get the following bizarre warning/note:
2965 // xx.m:13: warning: function called through a non-compatible type
2966 // xx.m:13: note: if this code is reached, the program will abort
2967 cast = NoTypeInfoCStyleCastExpr(Context,
2968 Context->getPointerType(Context->VoidTy),
2969 CastExpr::CK_Unknown, DRE);
2970
2971 // Now do the "normal" pointer to function cast.
2972 QualType castType = Context->getFunctionType(returnType,
2973 &ArgTypes[0], ArgTypes.size(),
2974 // If we don't have a method decl, force a variadic cast.
2975 Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : true, 0,
2976 false, false, 0, 0,
2977 FunctionType::ExtInfo());
2978 castType = Context->getPointerType(castType);
2979 cast = NoTypeInfoCStyleCastExpr(Context, castType, CastExpr::CK_Unknown,
2980 cast);
2981
2982 // Don't forget the parens to enforce the proper binding.
2983 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2984
2985 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2986 CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
2987 MsgExprs.size(),
2988 FT->getResultType(), EndLoc);
2989 Stmt *ReplacingStmt = CE;
2990 if (MsgSendStretFlavor) {
2991 // We have the method which returns a struct/union. Must also generate
2992 // call to objc_msgSend_stret and hang both varieties on a conditional
2993 // expression which dictate which one to envoke depending on size of
2994 // method's return type.
2995
2996 // Create a reference to the objc_msgSend_stret() declaration.
2997 DeclRefExpr *STDRE = new (Context) DeclRefExpr(MsgSendStretFlavor, msgSendType,
2998 SourceLocation());
2999 // Need to cast objc_msgSend_stret to "void *" (see above comment).
3000 cast = NoTypeInfoCStyleCastExpr(Context,
3001 Context->getPointerType(Context->VoidTy),
3002 CastExpr::CK_Unknown, STDRE);
3003 // Now do the "normal" pointer to function cast.
3004 castType = Context->getFunctionType(returnType,
3005 &ArgTypes[0], ArgTypes.size(),
3006 Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : false, 0,
3007 false, false, 0, 0,
3008 FunctionType::ExtInfo());
3009 castType = Context->getPointerType(castType);
3010 cast = NoTypeInfoCStyleCastExpr(Context, castType, CastExpr::CK_Unknown,
3011 cast);
3012
3013 // Don't forget the parens to enforce the proper binding.
3014 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), cast);
3015
3016 FT = msgSendType->getAs<FunctionType>();
3017 CallExpr *STCE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
3018 MsgExprs.size(),
3019 FT->getResultType(), SourceLocation());
3020
3021 // Build sizeof(returnType)
3022 SizeOfAlignOfExpr *sizeofExpr = new (Context) SizeOfAlignOfExpr(true,
3023 Context->getTrivialTypeSourceInfo(returnType),
3024 Context->getSizeType(),
3025 SourceLocation(), SourceLocation());
3026 // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
3027 // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
3028 // For X86 it is more complicated and some kind of target specific routine
3029 // is needed to decide what to do.
3030 unsigned IntSize =
3031 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
3032 IntegerLiteral *limit = new (Context) IntegerLiteral(llvm::APInt(IntSize, 8),
3033 Context->IntTy,
3034 SourceLocation());
3035 BinaryOperator *lessThanExpr = new (Context) BinaryOperator(sizeofExpr, limit,
3036 BinaryOperator::LE,
3037 Context->IntTy,
3038 SourceLocation());
3039 // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
3040 ConditionalOperator *CondExpr =
3041 new (Context) ConditionalOperator(lessThanExpr,
3042 SourceLocation(), CE,
3043 SourceLocation(), STCE, returnType);
3044 ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(), CondExpr);
3045 }
3046 // delete Exp; leak for now, see RewritePropertySetter() usage for more info.
3047 return ReplacingStmt;
3048 }
3049
3050 Stmt *RewriteObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3051 Stmt *ReplacingStmt = SynthMessageExpr(Exp, Exp->getLocStart(),
3052 Exp->getLocEnd());
3053
3054 // Now do the actual rewrite.
3055 ReplaceStmt(Exp, ReplacingStmt);
3056
3057 // delete Exp; leak for now, see RewritePropertySetter() usage for more info.
3058 return ReplacingStmt;
3059 }
3060
3061 // typedef struct objc_object Protocol;
3062 QualType RewriteObjC::getProtocolType() {
3063 if (!ProtocolTypeDecl) {
3064 TypeSourceInfo *TInfo
3065 = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3066 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3067 SourceLocation(),
3068 &Context->Idents.get("Protocol"),
3069 TInfo);
3070 }
3071 return Context->getTypeDeclType(ProtocolTypeDecl);
3072 }
3073
3074 /// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3075 /// a synthesized/forward data reference (to the protocol's metadata).
3076 /// The forward references (and metadata) are generated in
3077 /// RewriteObjC::HandleTranslationUnit().
3078 Stmt *RewriteObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3079 std::string Name = "_OBJC_PROTOCOL_" + Exp->getProtocol()->getNameAsString();
3080 IdentifierInfo *ID = &Context->Idents.get(Name);
3081 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3082 ID, getProtocolType(), 0,
3083 VarDecl::Extern, VarDecl::None);
3084 DeclRefExpr *DRE = new (Context) DeclRefExpr(VD, getProtocolType(), SourceLocation());
3085 Expr *DerefExpr = new (Context) UnaryOperator(DRE, UnaryOperator::AddrOf,
3086 Context->getPointerType(DRE->getType()),
3087 SourceLocation());
3088 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
3089 CastExpr::CK_Unknown,
3090 DerefExpr);
3091 ReplaceStmt(Exp, castExpr);
3092 ProtocolExprDecls.insert(Exp->getProtocol());
3093 // delete Exp; leak for now, see RewritePropertySetter() usage for more info.
3094 return castExpr;
3095
3096 }
3097
3098 bool RewriteObjC::BufferContainsPPDirectives(const char *startBuf,
3099 const char *endBuf) {
3100 while (startBuf < endBuf) {
3101 if (*startBuf == '#') {
3102 // Skip whitespace.
3103 for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
3104 ;
3105 if (!strncmp(startBuf, "if", strlen("if")) ||
3106 !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
3107 !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
3108 !strncmp(startBuf, "define", strlen("define")) ||
3109 !strncmp(startBuf, "undef", strlen("undef")) ||
3110 !strncmp(startBuf, "else", strlen("else")) ||
3111 !strncmp(startBuf, "elif", strlen("elif")) ||
3112 !strncmp(startBuf, "endif", strlen("endif")) ||
3113 !strncmp(startBuf, "pragma", strlen("pragma")) ||
3114 !strncmp(startBuf, "include", strlen("include")) ||
3115 !strncmp(startBuf, "import", strlen("import")) ||
3116 !strncmp(startBuf, "include_next", strlen("include_next")))
3117 return true;
3118 }
3119 startBuf++;
3120 }
3121 return false;
3122 }
3123
3124 /// SynthesizeObjCInternalStruct - Rewrite one internal struct corresponding to
3125 /// an objective-c class with ivars.
3126 void RewriteObjC::SynthesizeObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3127 std::string &Result) {
3128 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
3129 assert(CDecl->getNameAsCString() &&
3130 "Name missing in SynthesizeObjCInternalStruct");
3131 // Do not synthesize more than once.
3132 if (ObjCSynthesizedStructs.count(CDecl))
3133 return;
3134 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3135 int NumIvars = CDecl->ivar_size();
3136 SourceLocation LocStart = CDecl->getLocStart();
3137 SourceLocation LocEnd = CDecl->getLocEnd();
3138
3139 const char *startBuf = SM->getCharacterData(LocStart);
3140 const char *endBuf = SM->getCharacterData(LocEnd);
3141
3142 // If no ivars and no root or if its root, directly or indirectly,
3143 // have no ivars (thus not synthesized) then no need to synthesize this class.
3144 if ((CDecl->isForwardDecl() || NumIvars == 0) &&
3145 (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
3146 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3147 ReplaceText(LocStart, endBuf-startBuf, Result);
3148 return;
3149 }
3150
3151 // FIXME: This has potential of causing problem. If
3152 // SynthesizeObjCInternalStruct is ever called recursively.
3153 Result += "\nstruct ";
3154 Result += CDecl->getNameAsString();
3155 if (LangOpts.Microsoft)
3156 Result += "_IMPL";
3157
3158 if (NumIvars > 0) {
3159 const char *cursor = strchr(startBuf, '{');
3160 assert((cursor && endBuf)
3161 && "SynthesizeObjCInternalStruct - malformed @interface");
3162 // If the buffer contains preprocessor directives, we do more fine-grained
3163 // rewrites. This is intended to fix code that looks like (which occurs in
3164 // NSURL.h, for example):
3165 //
3166 // #ifdef XYZ
3167 // @interface Foo : NSObject
3168 // #else
3169 // @interface FooBar : NSObject
3170 // #endif
3171 // {
3172 // int i;
3173 // }
3174 // @end
3175 //
3176 // This clause is segregated to avoid breaking the common case.
3177 if (BufferContainsPPDirectives(startBuf, cursor)) {
3178 SourceLocation L = RCDecl ? CDecl->getSuperClassLoc() :
3179 CDecl->getClassLoc();
3180 const char *endHeader = SM->getCharacterData(L);
3181 endHeader += Lexer::MeasureTokenLength(L, *SM, LangOpts);
3182
3183 if (CDecl->protocol_begin() != CDecl->protocol_end()) {
3184 // advance to the end of the referenced protocols.
3185 while (endHeader < cursor && *endHeader != '>') endHeader++;
3186 endHeader++;
3187 }
3188 // rewrite the original header
3189 ReplaceText(LocStart, endHeader-startBuf, Result);
3190 } else {
3191 // rewrite the original header *without* disturbing the '{'
3192 ReplaceText(LocStart, cursor-startBuf, Result);
3193 }
3194 if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
3195 Result = "\n struct ";
3196 Result += RCDecl->getNameAsString();
3197 Result += "_IMPL ";
3198 Result += RCDecl->getNameAsString();
3199 Result += "_IVARS;\n";
3200
3201 // insert the super class structure definition.
3202 SourceLocation OnePastCurly =
3203 LocStart.getFileLocWithOffset(cursor-startBuf+1);
3204 InsertText(OnePastCurly, Result);
3205 }
3206 cursor++; // past '{'
3207
3208 // Now comment out any visibility specifiers.
3209 while (cursor < endBuf) {
3210 if (*cursor == '@') {
3211 SourceLocation atLoc = LocStart.getFileLocWithOffset(cursor-startBuf);
3212 // Skip whitespace.
3213 for (++cursor; cursor[0] == ' ' || cursor[0] == '\t'; ++cursor)
3214 /*scan*/;
3215
3216 // FIXME: presence of @public, etc. inside comment results in
3217 // this transformation as well, which is still correct c-code.
3218 if (!strncmp(cursor, "public", strlen("public")) ||
3219 !strncmp(cursor, "private", strlen("private")) ||
3220 !strncmp(cursor, "package", strlen("package")) ||
3221 !strncmp(cursor, "protected", strlen("protected")))
3222 InsertText(atLoc, "// ");
3223 }
3224 // FIXME: If there are cases where '<' is used in ivar declaration part
3225 // of user code, then scan the ivar list and use needToScanForQualifiers
3226 // for type checking.
3227 else if (*cursor == '<') {
3228 SourceLocation atLoc = LocStart.getFileLocWithOffset(cursor-startBuf);
3229 InsertText(atLoc, "/* ");
3230 cursor = strchr(cursor, '>');
3231 cursor++;
3232 atLoc = LocStart.getFileLocWithOffset(cursor-startBuf);
3233 InsertText(atLoc, " */");
3234 } else if (*cursor == '^') { // rewrite block specifier.
3235 SourceLocation caretLoc = LocStart.getFileLocWithOffset(cursor-startBuf);
3236 ReplaceText(caretLoc, 1, "*");
3237 }
3238 cursor++;
3239 }
3240 // Don't forget to add a ';'!!
3241 InsertText(LocEnd.getFileLocWithOffset(1), ";");
3242 } else { // we don't have any instance variables - insert super struct.
3243 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3244 Result += " {\n struct ";
3245 Result += RCDecl->getNameAsString();
3246 Result += "_IMPL ";
3247 Result += RCDecl->getNameAsString();
3248 Result += "_IVARS;\n};\n";
3249 ReplaceText(LocStart, endBuf-startBuf, Result);
3250 }
3251 // Mark this struct as having been generated.
3252 if (!ObjCSynthesizedStructs.insert(CDecl))
3253 assert(false && "struct already synthesize- SynthesizeObjCInternalStruct");
3254 }
3255
3256 // RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
3257 /// class methods.
3258 template<typename MethodIterator>
3259 void RewriteObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
3260 MethodIterator MethodEnd,
3261 bool IsInstanceMethod,
3262 const char *prefix,
3263 const char *ClassName,
3264 std::string &Result) {
3265 if (MethodBegin == MethodEnd) return;
3266
3267 if (!objc_impl_method) {
3268 /* struct _objc_method {
3269 SEL _cmd;
3270 char *method_types;
3271 void *_imp;
3272 }
3273 */
3274 Result += "\nstruct _objc_method {\n";
3275 Result += "\tSEL _cmd;\n";
3276 Result += "\tchar *method_types;\n";
3277 Result += "\tvoid *_imp;\n";
3278 Result += "};\n";
3279
3280 objc_impl_method = true;
3281 }
3282
3283 // Build _objc_method_list for class's methods if needed
3284
3285 /* struct {
3286 struct _objc_method_list *next_method;
3287 int method_count;
3288 struct _objc_method method_list[];
3289 }
3290 */
3291 unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
3292 Result += "\nstatic struct {\n";
3293 Result += "\tstruct _objc_method_list *next_method;\n";
3294 Result += "\tint method_count;\n";
3295 Result += "\tstruct _objc_method method_list[";
3296 Result += utostr(NumMethods);
3297 Result += "];\n} _OBJC_";
3298 Result += prefix;
3299 Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
3300 Result += "_METHODS_";
3301 Result += ClassName;
3302 Result += " __attribute__ ((used, section (\"__OBJC, __";
3303 Result += IsInstanceMethod ? "inst" : "cls";
3304 Result += "_meth\")))= ";
3305 Result += "{\n\t0, " + utostr(NumMethods) + "\n";
3306
3307 Result += "\t,{{(SEL)\"";
3308 Result += (*MethodBegin)->getSelector().getAsString().c_str();
3309 std::string MethodTypeString;
3310 Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
3311 Result += "\", \"";
3312 Result += MethodTypeString;
3313 Result += "\", (void *)";
3314 Result += MethodInternalNames[*MethodBegin];
3315 Result += "}\n";
3316 for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
3317 Result += "\t ,{(SEL)\"";
3318 Result += (*MethodBegin)->getSelector().getAsString().c_str();
3319 std::string MethodTypeString;
3320 Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
3321 Result += "\", \"";
3322 Result += MethodTypeString;
3323 Result += "\", (void *)";
3324 Result += MethodInternalNames[*MethodBegin];
3325 Result += "}\n";
3326 }
3327 Result += "\t }\n};\n";
3328 }
3329
3330 /// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
3331 void RewriteObjC::
3332 RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl, const char *prefix,
3333 const char *ClassName, std::string &Result) {
3334 static bool objc_protocol_methods = false;
3335
3336 // Output struct protocol_methods holder of method selector and type.
3337 if (!objc_protocol_methods && !PDecl->isForwardDecl()) {
3338 /* struct protocol_methods {
3339 SEL _cmd;
3340 char *method_types;
3341 }
3342 */
3343 Result += "\nstruct _protocol_methods {\n";
3344 Result += "\tstruct objc_selector *_cmd;\n";
3345 Result += "\tchar *method_types;\n";
3346 Result += "};\n";
3347
3348 objc_protocol_methods = true;
3349 }
3350 // Do not synthesize the protocol more than once.
3351 if (ObjCSynthesizedProtocols.count(PDecl))
3352 return;
3353
3354 if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
3355 unsigned NumMethods = std::distance(PDecl->instmeth_begin(),
3356 PDecl->instmeth_end());
3357 /* struct _objc_protocol_method_list {
3358 int protocol_method_count;
3359 struct protocol_methods protocols[];
3360 }
3361 */
3362 Result += "\nstatic struct {\n";
3363 Result += "\tint protocol_method_count;\n";
3364 Result += "\tstruct _protocol_methods protocol_methods[";
3365 Result += utostr(NumMethods);
3366 Result += "];\n} _OBJC_PROTOCOL_INSTANCE_METHODS_";
3367 Result += PDecl->getNameAsString();
3368 Result += " __attribute__ ((used, section (\"__OBJC, __cat_inst_meth\")))= "
3369 "{\n\t" + utostr(NumMethods) + "\n";
3370
3371 // Output instance methods declared in this protocol.
3372 for (ObjCProtocolDecl::instmeth_iterator
3373 I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
3374 I != E; ++I) {
3375 if (I == PDecl->instmeth_begin())
3376 Result += "\t ,{{(struct objc_selector *)\"";
3377 else
3378 Result += "\t ,{(struct objc_selector *)\"";
3379 Result += (*I)->getSelector().getAsString().c_str();
3380 std::string MethodTypeString;
3381 Context->getObjCEncodingForMethodDecl((*I), MethodTypeString);
3382 Result += "\", \"";
3383 Result += MethodTypeString;
3384 Result += "\"}\n";
3385 }
3386 Result += "\t }\n};\n";
3387 }
3388
3389 // Output class methods declared in this protocol.
3390 unsigned NumMethods = std::distance(PDecl->classmeth_begin(),
3391 PDecl->classmeth_end());
3392 if (NumMethods > 0) {
3393 /* struct _objc_protocol_method_list {
3394 int protocol_method_count;
3395 struct protocol_methods protocols[];
3396 }
3397 */
3398 Result += "\nstatic struct {\n";
3399 Result += "\tint protocol_method_count;\n";
3400 Result += "\tstruct _protocol_methods protocol_methods[";
3401 Result += utostr(NumMethods);
3402 Result += "];\n} _OBJC_PROTOCOL_CLASS_METHODS_";
3403 Result += PDecl->getNameAsString();
3404 Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
3405 "{\n\t";
3406 Result += utostr(NumMethods);
3407 Result += "\n";
3408
3409 // Output instance methods declared in this protocol.
3410 for (ObjCProtocolDecl::classmeth_iterator
3411 I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
3412 I != E; ++I) {
3413 if (I == PDecl->classmeth_begin())
3414 Result += "\t ,{{(struct objc_selector *)\"";
3415 else
3416 Result += "\t ,{(struct objc_selector *)\"";
3417 Result += (*I)->getSelector().getAsString().c_str();
3418 std::string MethodTypeString;
3419 Context->getObjCEncodingForMethodDecl((*I), MethodTypeString);
3420 Result += "\", \"";
3421 Result += MethodTypeString;
3422 Result += "\"}\n";
3423 }
3424 Result += "\t }\n};\n";
3425 }
3426
3427 // Output:
3428 /* struct _objc_protocol {
3429 // Objective-C 1.0 extensions
3430 struct _objc_protocol_extension *isa;
3431 char *protocol_name;
3432 struct _objc_protocol **protocol_list;
3433 struct _objc_protocol_method_list *instance_methods;
3434 struct _objc_protocol_method_list *class_methods;
3435 };
3436 */
3437 static bool objc_protocol = false;
3438 if (!objc_protocol) {
3439 Result += "\nstruct _objc_protocol {\n";
3440 Result += "\tstruct _objc_protocol_extension *isa;\n";
3441 Result += "\tchar *protocol_name;\n";
3442 Result += "\tstruct _objc_protocol **protocol_list;\n";
3443 Result += "\tstruct _objc_protocol_method_list *instance_methods;\n";
3444 Result += "\tstruct _objc_protocol_method_list *class_methods;\n";
3445 Result += "};\n";
3446
3447 objc_protocol = true;
3448 }
3449
3450 Result += "\nstatic struct _objc_protocol _OBJC_PROTOCOL_";
3451 Result += PDecl->getNameAsString();
3452 Result += " __attribute__ ((used, section (\"__OBJC, __protocol\")))= "
3453 "{\n\t0, \"";
3454 Result += PDecl->getNameAsString();
3455 Result += "\", 0, ";
3456 if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
3457 Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
3458 Result += PDecl->getNameAsString();
3459 Result += ", ";
3460 }
3461 else
3462 Result += "0, ";
3463 if (PDecl->classmeth_begin() != PDecl->classmeth_end()) {
3464 Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_CLASS_METHODS_";
3465 Result += PDecl->getNameAsString();
3466 Result += "\n";
3467 }
3468 else
3469 Result += "0\n";
3470 Result += "};\n";
3471
3472 // Mark this protocol as having been generated.
3473 if (!ObjCSynthesizedProtocols.insert(PDecl))
3474 assert(false && "protocol already synthesized");
3475
3476 }
3477
3478 void RewriteObjC::
3479 RewriteObjCProtocolListMetaData(const ObjCList<ObjCProtocolDecl> &Protocols,
3480 const char *prefix, const char *ClassName,
3481 std::string &Result) {
3482 if (Protocols.empty()) return;
3483
3484 for (unsigned i = 0; i != Protocols.size(); i++)
3485 RewriteObjCProtocolMetaData(Protocols[i], prefix, ClassName, Result);
3486
3487 // Output the top lovel protocol meta-data for the class.
3488 /* struct _objc_protocol_list {
3489 struct _objc_protocol_list *next;
3490 int protocol_count;
3491 struct _objc_protocol *class_protocols[];
3492 }
3493 */
3494 Result += "\nstatic struct {\n";
3495 Result += "\tstruct _objc_protocol_list *next;\n";
3496 Result += "\tint protocol_count;\n";
3497 Result += "\tstruct _objc_protocol *class_protocols[";
3498 Result += utostr(Protocols.size());
3499 Result += "];\n} _OBJC_";
3500 Result += prefix;
3501 Result += "_PROTOCOLS_";
3502 Result += ClassName;
3503 Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
3504 "{\n\t0, ";
3505 Result += utostr(Protocols.size());
3506 Result += "\n";
3507
3508 Result += "\t,{&_OBJC_PROTOCOL_";
3509 Result += Protocols[0]->getNameAsString();
3510 Result += " \n";
3511
3512 for (unsigned i = 1; i != Protocols.size(); i++) {
3513 Result += "\t ,&_OBJC_PROTOCOL_";
3514 Result += Protocols[i]->getNameAsString();
3515 Result += "\n";
3516 }
3517 Result += "\t }\n};\n";
3518 }
3519
3520
3521 /// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
3522 /// implementation.
3523 void RewriteObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
3524 std::string &Result) {
3525 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
3526 // Find category declaration for this implementation.
3527 ObjCCategoryDecl *CDecl;
3528 for (CDecl = ClassDecl->getCategoryList(); CDecl;
3529 CDecl = CDecl->getNextClassCategory())
3530 if (CDecl->getIdentifier() == IDecl->getIdentifier())
3531 break;
3532
3533 std::string FullCategoryName = ClassDecl->getNameAsString();
3534 FullCategoryName += '_';
3535 FullCategoryName += IDecl->getNameAsString();
3536
3537 // Build _objc_method_list for class's instance methods if needed
3538 llvm::SmallVector<ObjCMethodDecl *, 32>
3539 InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
3540
3541 // If any of our property implementations have associated getters or
3542 // setters, produce metadata for them as well.
3543 for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
3544 PropEnd = IDecl->propimpl_end();
3545 Prop != PropEnd; ++Prop) {
3546 if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
3547 continue;
3548 if (!(*Prop)->getPropertyIvarDecl())
3549 continue;
3550 ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
3551 if (!PD)
3552 continue;
3553 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
3554 InstanceMethods.push_back(Getter);
3555 if (PD->isReadOnly())
3556 continue;
3557 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
3558 InstanceMethods.push_back(Setter);
3559 }
3560 RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
3561 true, "CATEGORY_", FullCategoryName.c_str(),
3562 Result);
3563
3564 // Build _objc_method_list for class's class methods if needed
3565 RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
3566 false, "CATEGORY_", FullCategoryName.c_str(),
3567 Result);
3568
3569 // Protocols referenced in class declaration?
3570 // Null CDecl is case of a category implementation with no category interface
3571 if (CDecl)
3572 RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(), "CATEGORY",
3573 FullCategoryName.c_str(), Result);
3574 /* struct _objc_category {
3575 char *category_name;
3576 char *class_name;
3577 struct _objc_method_list *instance_methods;
3578 struct _objc_method_list *class_methods;
3579 struct _objc_protocol_list *protocols;
3580 // Objective-C 1.0 extensions
3581 uint32_t size; // sizeof (struct _objc_category)
3582 struct _objc_property_list *instance_properties; // category's own
3583 // @property decl.
3584 };
3585 */
3586
3587 static bool objc_category = false;
3588 if (!objc_category) {
3589 Result += "\nstruct _objc_category {\n";
3590 Result += "\tchar *category_name;\n";
3591 Result += "\tchar *class_name;\n";
3592 Result += "\tstruct _objc_method_list *instance_methods;\n";
3593 Result += "\tstruct _objc_method_list *class_methods;\n";
3594 Result += "\tstruct _objc_protocol_list *protocols;\n";
3595 Result += "\tunsigned int size;\n";
3596 Result += "\tstruct _objc_property_list *instance_properties;\n";
3597 Result += "};\n";
3598 objc_category = true;
3599 }
3600 Result += "\nstatic struct _objc_category _OBJC_CATEGORY_";
3601 Result += FullCategoryName;
3602 Result += " __attribute__ ((used, section (\"__OBJC, __category\")))= {\n\t\"";
3603 Result += IDecl->getNameAsString();
3604 Result += "\"\n\t, \"";
3605 Result += ClassDecl->getNameAsString();
3606 Result += "\"\n";
3607
3608 if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
3609 Result += "\t, (struct _objc_method_list *)"
3610 "&_OBJC_CATEGORY_INSTANCE_METHODS_";
3611 Result += FullCategoryName;
3612 Result += "\n";
3613 }
3614 else
3615 Result += "\t, 0\n";
3616 if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
3617 Result += "\t, (struct _objc_method_list *)"
3618 "&_OBJC_CATEGORY_CLASS_METHODS_";
3619 Result += FullCategoryName;
3620 Result += "\n";
3621 }
3622 else
3623 Result += "\t, 0\n";
3624
3625 if (CDecl && CDecl->protocol_begin() != CDecl->protocol_end()) {
3626 Result += "\t, (struct _objc_protocol_list *)&_OBJC_CATEGORY_PROTOCOLS_";
3627 Result += FullCategoryName;
3628 Result += "\n";
3629 }
3630 else
3631 Result += "\t, 0\n";
3632 Result += "\t, sizeof(struct _objc_category), 0\n};\n";
3633 }
3634
3635 /// SynthesizeIvarOffsetComputation - This rutine synthesizes computation of
3636 /// ivar offset.
3637 void RewriteObjC::SynthesizeIvarOffsetComputation(ObjCContainerDecl *IDecl,
3638 ObjCIvarDecl *ivar,
3639 std::string &Result) {
3640 if (ivar->isBitField()) {
3641 // FIXME: The hack below doesn't work for bitfields. For now, we simply
3642 // place all bitfields at offset 0.
3643 Result += "0";
3644 } else {
3645 Result += "__OFFSETOFIVAR__(struct ";
3646 Result += IDecl->getNameAsString();
3647 if (LangOpts.Microsoft)
3648 Result += "_IMPL";
3649 Result += ", ";
3650 Result += ivar->getNameAsString();
3651 Result += ")";
3652 }
3653 }
3654
3655 //===----------------------------------------------------------------------===//
3656 // Meta Data Emission
3657 //===----------------------------------------------------------------------===//
3658
3659 void RewriteObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
3660 std::string &Result) {
3661 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
3662
3663 // Explictly declared @interface's are already synthesized.
3664 if (CDecl->isImplicitInterfaceDecl()) {
3665 // FIXME: Implementation of a class with no @interface (legacy) doese not
3666 // produce correct synthesis as yet.
3667 SynthesizeObjCInternalStruct(CDecl, Result);
3668 }
3669
3670 // Build _objc_ivar_list metadata for classes ivars if needed
3671 unsigned NumIvars = !IDecl->ivar_empty()
3672 ? IDecl->ivar_size()
3673 : (CDecl ? CDecl->ivar_size() : 0);
3674 if (NumIvars > 0) {
3675 static bool objc_ivar = false;
3676 if (!objc_ivar) {
3677 /* struct _objc_ivar {
3678 char *ivar_name;
3679 char *ivar_type;
3680 int ivar_offset;
3681 };
3682 */
3683 Result += "\nstruct _objc_ivar {\n";
3684 Result += "\tchar *ivar_name;\n";
3685 Result += "\tchar *ivar_type;\n";
3686 Result += "\tint ivar_offset;\n";
3687 Result += "};\n";
3688
3689 objc_ivar = true;
3690 }
3691
3692 /* struct {
3693 int ivar_count;
3694 struct _objc_ivar ivar_list[nIvars];
3695 };
3696 */
3697 Result += "\nstatic struct {\n";
3698 Result += "\tint ivar_count;\n";
3699 Result += "\tstruct _objc_ivar ivar_list[";
3700 Result += utostr(NumIvars);
3701 Result += "];\n} _OBJC_INSTANCE_VARIABLES_";
3702 Result += IDecl->getNameAsString();
3703 Result += " __attribute__ ((used, section (\"__OBJC, __instance_vars\")))= "
3704 "{\n\t";
3705 Result += utostr(NumIvars);
3706 Result += "\n";
3707
3708 ObjCInterfaceDecl::ivar_iterator IVI, IVE;
3709 llvm::SmallVector<ObjCIvarDecl *, 8> IVars;
3710 if (!IDecl->ivar_empty()) {
3711 for (ObjCInterfaceDecl::ivar_iterator
3712 IV = IDecl->ivar_begin(), IVEnd = IDecl->ivar_end();
3713 IV != IVEnd; ++IV)
3714 IVars.push_back(*IV);
3715 IVI = IDecl->ivar_begin();
3716 IVE = IDecl->ivar_end();
3717 } else {
3718 IVI = CDecl->ivar_begin();
3719 IVE = CDecl->ivar_end();
3720 }
3721 Result += "\t,{{\"";
3722 Result += (*IVI)->getNameAsString();
3723 Result += "\", \"";
3724 std::string TmpString, StrEncoding;
3725 Context->getObjCEncodingForType((*IVI)->getType(), TmpString, *IVI);
3726 QuoteDoublequotes(TmpString, StrEncoding);
3727 Result += StrEncoding;
3728 Result += "\", ";
3729 SynthesizeIvarOffsetComputation(IDecl, *IVI, Result);
3730 Result += "}\n";
3731 for (++IVI; IVI != IVE; ++IVI) {
3732 Result += "\t ,{\"";
3733 Result += (*IVI)->getNameAsString();
3734 Result += "\", \"";
3735 std::string TmpString, StrEncoding;
3736 Context->getObjCEncodingForType((*IVI)->getType(), TmpString, *IVI);
3737 QuoteDoublequotes(TmpString, StrEncoding);
3738 Result += StrEncoding;
3739 Result += "\", ";
3740 SynthesizeIvarOffsetComputation(IDecl, (*IVI), Result);
3741 Result += "}\n";
3742 }
3743
3744 Result += "\t }\n};\n";
3745 }
3746
3747 // Build _objc_method_list for class's instance methods if needed
3748 llvm::SmallVector<ObjCMethodDecl *, 32>
3749 InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
3750
3751 // If any of our property implementations have associated getters or
3752 // setters, produce metadata for them as well.
3753 for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
3754 PropEnd = IDecl->propimpl_end();
3755 Prop != PropEnd; ++Prop) {
3756 if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
3757 continue;
3758 if (!(*Prop)->getPropertyIvarDecl())
3759 continue;
3760 ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
3761 if (!PD)
3762 continue;
3763 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
3764 InstanceMethods.push_back(Getter);
3765 if (PD->isReadOnly())
3766 continue;
3767 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
3768 InstanceMethods.push_back(Setter);
3769 }
3770 RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
3771 true, "", IDecl->getNameAsCString(), Result);
3772
3773 // Build _objc_method_list for class's class methods if needed
3774 RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
3775 false, "", IDecl->getNameAsCString(), Result);
3776
3777 // Protocols referenced in class declaration?
3778 RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(),
3779 "CLASS", CDecl->getNameAsCString(), Result);
3780
3781 // Declaration of class/meta-class metadata
3782 /* struct _objc_class {
3783 struct _objc_class *isa; // or const char *root_class_name when metadata
3784 const char *super_class_name;
3785 char *name;
3786 long version;
3787 long info;
3788 long instance_size;
3789 struct _objc_ivar_list *ivars;
3790 struct _objc_method_list *methods;
3791 struct objc_cache *cache;
3792 struct objc_protocol_list *protocols;
3793 const char *ivar_layout;
3794 struct _objc_class_ext *ext;
3795 };
3796 */
3797 static bool objc_class = false;
3798 if (!objc_class) {
3799 Result += "\nstruct _objc_class {\n";
3800 Result += "\tstruct _objc_class *isa;\n";
3801 Result += "\tconst char *super_class_name;\n";
3802 Result += "\tchar *name;\n";
3803 Result += "\tlong version;\n";
3804 Result += "\tlong info;\n";
3805 Result += "\tlong instance_size;\n";
3806 Result += "\tstruct _objc_ivar_list *ivars;\n";
3807 Result += "\tstruct _objc_method_list *methods;\n";
3808 Result += "\tstruct objc_cache *cache;\n";
3809 Result += "\tstruct _objc_protocol_list *protocols;\n";
3810 Result += "\tconst char *ivar_layout;\n";
3811 Result += "\tstruct _objc_class_ext *ext;\n";
3812 Result += "};\n";
3813 objc_class = true;
3814 }
3815
3816 // Meta-class metadata generation.
3817 ObjCInterfaceDecl *RootClass = 0;
3818 ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
3819 while (SuperClass) {
3820 RootClass = SuperClass;
3821 SuperClass = SuperClass->getSuperClass();
3822 }
3823 SuperClass = CDecl->getSuperClass();
3824
3825 Result += "\nstatic struct _objc_class _OBJC_METACLASS_";
3826 Result += CDecl->getNameAsString();
3827 Result += " __attribute__ ((used, section (\"__OBJC, __meta_class\")))= "
3828 "{\n\t(struct _objc_class *)\"";
3829 Result += (RootClass ? RootClass->getNameAsString() : CDecl->getNameAsString());
3830 Result += "\"";
3831
3832 if (SuperClass) {
3833 Result += ", \"";
3834 Result += SuperClass->getNameAsString();
3835 Result += "\", \"";
3836 Result += CDecl->getNameAsString();
3837 Result += "\"";
3838 }
3839 else {
3840 Result += ", 0, \"";
3841 Result += CDecl->getNameAsString();
3842 Result += "\"";
3843 }
3844 // Set 'ivars' field for root class to 0. ObjC1 runtime does not use it.
3845 // 'info' field is initialized to CLS_META(2) for metaclass
3846 Result += ", 0,2, sizeof(struct _objc_class), 0";
3847 if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
3848 Result += "\n\t, (struct _objc_method_list *)&_OBJC_CLASS_METHODS_";
3849 Result += IDecl->getNameAsString();
3850 Result += "\n";
3851 }
3852 else
3853 Result += ", 0\n";
3854 if (CDecl->protocol_begin() != CDecl->protocol_end()) {
3855 Result += "\t,0, (struct _objc_protocol_list *)&_OBJC_CLASS_PROTOCOLS_";
3856 Result += CDecl->getNameAsString();
3857 Result += ",0,0\n";
3858 }
3859 else
3860 Result += "\t,0,0,0,0\n";
3861 Result += "};\n";
3862
3863 // class metadata generation.
3864 Result += "\nstatic struct _objc_class _OBJC_CLASS_";
3865 Result += CDecl->getNameAsString();
3866 Result += " __attribute__ ((used, section (\"__OBJC, __class\")))= "
3867 "{\n\t&_OBJC_METACLASS_";
3868 Result += CDecl->getNameAsString();
3869 if (SuperClass) {
3870 Result += ", \"";
3871 Result += SuperClass->getNameAsString();
3872 Result += "\", \"";
3873 Result += CDecl->getNameAsString();
3874 Result += "\"";
3875 }
3876 else {
3877 Result += ", 0, \"";
3878 Result += CDecl->getNameAsString();
3879 Result += "\"";
3880 }
3881 // 'info' field is initialized to CLS_CLASS(1) for class
3882 Result += ", 0,1";
3883 if (!ObjCSynthesizedStructs.count(CDecl))
3884 Result += ",0";
3885 else {
3886 // class has size. Must synthesize its size.
3887 Result += ",sizeof(struct ";
3888 Result += CDecl->getNameAsString();
3889 if (LangOpts.Microsoft)
3890 Result += "_IMPL";
3891 Result += ")";
3892 }
3893 if (NumIvars > 0) {
3894 Result += ", (struct _objc_ivar_list *)&_OBJC_INSTANCE_VARIABLES_";
3895 Result += CDecl->getNameAsString();
3896 Result += "\n\t";
3897 }
3898 else
3899 Result += ",0";
3900 if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
3901 Result += ", (struct _objc_method_list *)&_OBJC_INSTANCE_METHODS_";
3902 Result += CDecl->getNameAsString();
3903 Result += ", 0\n\t";
3904 }
3905 else
3906 Result += ",0,0";
3907 if (CDecl->protocol_begin() != CDecl->protocol_end()) {
3908 Result += ", (struct _objc_protocol_list*)&_OBJC_CLASS_PROTOCOLS_";
3909 Result += CDecl->getNameAsString();
3910 Result += ", 0,0\n";
3911 }
3912 else
3913 Result += ",0,0,0\n";
3914 Result += "};\n";
3915 }
3916
3917 /// RewriteImplementations - This routine rewrites all method implementations
3918 /// and emits meta-data.
3919
3920 void RewriteObjC::RewriteImplementations() {
3921 int ClsDefCount = ClassImplementation.size();
3922 int CatDefCount = CategoryImplementation.size();
3923
3924 // Rewrite implemented methods
3925 for (int i = 0; i < ClsDefCount; i++)
3926 RewriteImplementationDecl(ClassImplementation[i]);
3927
3928 for (int i = 0; i < CatDefCount; i++)
3929 RewriteImplementationDecl(CategoryImplementation[i]);
3930 }
3931
3932 void RewriteObjC::SynthesizeMetaDataIntoBuffer(std::string &Result) {
3933 int ClsDefCount = ClassImplementation.size();
3934 int CatDefCount = CategoryImplementation.size();
3935
3936 // For each implemented class, write out all its meta data.
3937 for (int i = 0; i < ClsDefCount; i++)
3938 RewriteObjCClassMetaData(ClassImplementation[i], Result);
3939
3940 // For each implemented category, write out all its meta data.
3941 for (int i = 0; i < CatDefCount; i++)
3942 RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
3943
3944 // Write objc_symtab metadata
3945 /*
3946 struct _objc_symtab
3947 {
3948 long sel_ref_cnt;
3949 SEL *refs;
3950 short cls_def_cnt;
3951 short cat_def_cnt;
3952 void *defs[cls_def_cnt + cat_def_cnt];
3953 };
3954 */
3955
3956 Result += "\nstruct _objc_symtab {\n";
3957 Result += "\tlong sel_ref_cnt;\n";
3958 Result += "\tSEL *refs;\n";
3959 Result += "\tshort cls_def_cnt;\n";
3960 Result += "\tshort cat_def_cnt;\n";
3961 Result += "\tvoid *defs[" + utostr(ClsDefCount + CatDefCount)+ "];\n";
3962 Result += "};\n\n";
3963
3964 Result += "static struct _objc_symtab "
3965 "_OBJC_SYMBOLS __attribute__((used, section (\"__OBJC, __symbols\")))= {\n";
3966 Result += "\t0, 0, " + utostr(ClsDefCount)
3967 + ", " + utostr(CatDefCount) + "\n";
3968 for (int i = 0; i < ClsDefCount; i++) {
3969 Result += "\t,&_OBJC_CLASS_";
3970 Result += ClassImplementation[i]->getNameAsString();
3971 Result += "\n";
3972 }
3973
3974 for (int i = 0; i < CatDefCount; i++) {
3975 Result += "\t,&_OBJC_CATEGORY_";
3976 Result += CategoryImplementation[i]->getClassInterface()->getNameAsString();
3977 Result += "_";
3978 Result += CategoryImplementation[i]->getNameAsString();
3979 Result += "\n";
3980 }
3981
3982 Result += "};\n\n";
3983
3984 // Write objc_module metadata
3985
3986 /*
3987 struct _objc_module {
3988 long version;
3989 long size;
3990 const char *name;
3991 struct _objc_symtab *symtab;
3992 }
3993 */
3994
3995 Result += "\nstruct _objc_module {\n";
3996 Result += "\tlong version;\n";
3997 Result += "\tlong size;\n";
3998 Result += "\tconst char *name;\n";
3999 Result += "\tstruct _objc_symtab *symtab;\n";
4000 Result += "};\n\n";
4001 Result += "static struct _objc_module "
4002 "_OBJC_MODULES __attribute__ ((used, section (\"__OBJC, __module_info\")))= {\n";
4003 Result += "\t" + utostr(OBJC_ABI_VERSION) +
4004 ", sizeof(struct _objc_module), \"\", &_OBJC_SYMBOLS\n";
4005 Result += "};\n\n";
4006
4007 if (LangOpts.Microsoft) {
4008 if (ProtocolExprDecls.size()) {
4009 Result += "#pragma section(\".objc_protocol$B\",long,read,write)\n";
4010 Result += "#pragma data_seg(push, \".objc_protocol$B\")\n";
4011 for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
4012 E = ProtocolExprDecls.end(); I != E; ++I) {
4013 Result += "static struct _objc_protocol *_POINTER_OBJC_PROTOCOL_";
4014 Result += (*I)->getNameAsString();
4015 Result += " = &_OBJC_PROTOCOL_";
4016 Result += (*I)->getNameAsString();
4017 Result += ";\n";
4018 }
4019 Result += "#pragma data_seg(pop)\n\n";
4020 }
4021 Result += "#pragma section(\".objc_module_info$B\",long,read,write)\n";
4022 Result += "#pragma data_seg(push, \".objc_module_info$B\")\n";
4023 Result += "static struct _objc_module *_POINTER_OBJC_MODULES = ";
4024 Result += "&_OBJC_MODULES;\n";
4025 Result += "#pragma data_seg(pop)\n\n";
4026 }
4027 }
4028
4029 void RewriteObjC::RewriteByRefString(std::string &ResultStr,
4030 const std::string &Name,
4031 ValueDecl *VD) {
4032 assert(BlockByRefDeclNo.count(VD) &&
4033 "RewriteByRefString: ByRef decl missing");
4034 ResultStr += "struct __Block_byref_" + Name +
4035 "_" + utostr(BlockByRefDeclNo[VD]) ;
4036 }
4037
4038 static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4039 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4040 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4041 return false;
4042 }
4043
4044 std::string RewriteObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4045 const char *funcName,
4046 std::string Tag) {
4047 const FunctionType *AFT = CE->getFunctionType();
4048 QualType RT = AFT->getResultType();
4049 std::string StructRef = "struct " + Tag;
4050 std::string S = "static " + RT.getAsString(Context->PrintingPolicy) + " __" +
4051 funcName + "_" + "block_func_" + utostr(i);
4052
4053 BlockDecl *BD = CE->getBlockDecl();
4054
4055 if (isa<FunctionNoProtoType>(AFT)) {
4056 // No user-supplied arguments. Still need to pass in a pointer to the
4057 // block (to reference imported block decl refs).
4058 S += "(" + StructRef + " *__cself)";
4059 } else if (BD->param_empty()) {
4060 S += "(" + StructRef + " *__cself)";
4061 } else {
4062 const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
4063 assert(FT && "SynthesizeBlockFunc: No function proto");
4064 S += '(';
4065 // first add the implicit argument.
4066 S += StructRef + " *__cself, ";
4067 std::string ParamStr;
4068 for (BlockDecl::param_iterator AI = BD->param_begin(),
4069 E = BD->param_end(); AI != E; ++AI) {
4070 if (AI != BD->param_begin()) S += ", ";
4071 ParamStr = (*AI)->getNameAsString();
4072 QualType QT = (*AI)->getType();
4073 if (convertBlockPointerToFunctionPointer(QT))
4074 QT.getAsStringInternal(ParamStr, Context->PrintingPolicy);
4075 else
4076 QT.getAsStringInternal(ParamStr, Context->PrintingPolicy);
4077 S += ParamStr;
4078 }
4079 if (FT->isVariadic()) {
4080 if (!BD->param_empty()) S += ", ";
4081 S += "...";
4082 }
4083 S += ')';
4084 }
4085 S += " {\n";
4086
4087 // Create local declarations to avoid rewriting all closure decl ref exprs.
4088 // First, emit a declaration for all "by ref" decls.
4089 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
4090 E = BlockByRefDecls.end(); I != E; ++I) {
4091 S += " ";
4092 std::string Name = (*I)->getNameAsString();
4093 std::string TypeString;
4094 RewriteByRefString(TypeString, Name, (*I));
4095 TypeString += " *";
4096 Name = TypeString + Name;
4097 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4098 }
4099 // Next, emit a declaration for all "by copy" declarations.
4100 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
4101 E = BlockByCopyDecls.end(); I != E; ++I) {
4102 S += " ";
4103 // Handle nested closure invocation. For example:
4104 //
4105 // void (^myImportedClosure)(void);
4106 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4107 //
4108 // void (^anotherClosure)(void);
4109 // anotherClosure = ^(void) {
4110 // myImportedClosure(); // import and invoke the closure
4111 // };
4112 //
4113 if (isTopLevelBlockPointerType((*I)->getType())) {
4114 RewriteBlockPointerTypeVariable(S, (*I));
4115 S += " = (";
4116 RewriteBlockPointerType(S, (*I)->getType());
4117 S += ")";
4118 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4119 }
4120 else {
4121 std::string Name = (*I)->getNameAsString();
4122 QualType QT = (*I)->getType();
4123 if (HasLocalVariableExternalStorage(*I))
4124 QT = Context->getPointerType(QT);
4125 QT.getAsStringInternal(Name, Context->PrintingPolicy);
4126 S += Name + " = __cself->" +
4127 (*I)->getNameAsString() + "; // bound by copy\n";
4128 }
4129 }
4130 std::string RewrittenStr = RewrittenBlockExprs[CE];
4131 const char *cstr = RewrittenStr.c_str();
4132 while (*cstr++ != '{') ;
4133 S += cstr;
4134 S += "\n";
4135 return S;
4136 }
4137
4138 std::string RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4139 const char *funcName,
4140 std::string Tag) {
4141 std::string StructRef = "struct " + Tag;
4142 std::string S = "static void __";
4143
4144 S += funcName;
4145 S += "_block_copy_" + utostr(i);
4146 S += "(" + StructRef;
4147 S += "*dst, " + StructRef;
4148 S += "*src) {";
4149 for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
4150 E = ImportedBlockDecls.end(); I != E; ++I) {
4151 S += "_Block_object_assign((void*)&dst->";
4152 S += (*I)->getNameAsString();
4153 S += ", (void*)src->";
4154 S += (*I)->getNameAsString();
4155 if (BlockByRefDeclsPtrSet.count((*I)))
4156 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4157 else
4158 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4159 }
4160 S += "}\n";
4161
4162 S += "\nstatic void __";
4163 S += funcName;
4164 S += "_block_dispose_" + utostr(i);
4165 S += "(" + StructRef;
4166 S += "*src) {";
4167 for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
4168 E = ImportedBlockDecls.end(); I != E; ++I) {
4169 S += "_Block_object_dispose((void*)src->";
4170 S += (*I)->getNameAsString();
4171 if (BlockByRefDeclsPtrSet.count((*I)))
4172 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4173 else
4174 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4175 }
4176 S += "}\n";
4177 return S;
4178 }
4179
4180 std::string RewriteObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4181 std::string Desc) {
4182 std::string S = "\nstruct " + Tag;
4183 std::string Constructor = " " + Tag;
4184
4185 S += " {\n struct __block_impl impl;\n";
4186 S += " struct " + Desc;
4187 S += "* Desc;\n";
4188
4189 Constructor += "(void *fp, "; // Invoke function pointer.
4190 Constructor += "struct " + Desc; // Descriptor pointer.
4191 Constructor += " *desc";
4192
4193 if (BlockDeclRefs.size()) {
4194 // Output all "by copy" declarations.
4195 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
4196 E = BlockByCopyDecls.end(); I != E; ++I) {
4197 S += " ";
4198 std::string FieldName = (*I)->getNameAsString();
4199 std::string ArgName = "_" + FieldName;
4200 // Handle nested closure invocation. For example:
4201 //
4202 // void (^myImportedBlock)(void);
4203 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4204 //
4205 // void (^anotherBlock)(void);
4206 // anotherBlock = ^(void) {
4207 // myImportedBlock(); // import and invoke the closure
4208 // };
4209 //
4210 if (isTopLevelBlockPointerType((*I)->getType())) {
4211 S += "struct __block_impl *";
4212 Constructor += ", void *" + ArgName;
4213 } else {
4214 QualType QT = (*I)->getType();
4215 if (HasLocalVariableExternalStorage(*I))
4216 QT = Context->getPointerType(QT);
4217 QT.getAsStringInternal(FieldName, Context->PrintingPolicy);
4218 QT.getAsStringInternal(ArgName, Context->PrintingPolicy);
4219 Constructor += ", " + ArgName;
4220 }
4221 S += FieldName + ";\n";
4222 }
4223 // Output all "by ref" declarations.
4224 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
4225 E = BlockByRefDecls.end(); I != E; ++I) {
4226 S += " ";
4227 std::string FieldName = (*I)->getNameAsString();
4228 std::string ArgName = "_" + FieldName;
4229 // Handle nested closure invocation. For example:
4230 //
4231 // void (^myImportedBlock)(void);
4232 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4233 //
4234 // void (^anotherBlock)(void);
4235 // anotherBlock = ^(void) {
4236 // myImportedBlock(); // import and invoke the closure
4237 // };
4238 //
4239 if (isTopLevelBlockPointerType((*I)->getType())) {
4240 S += "struct __block_impl *";
4241 Constructor += ", void *" + ArgName;
4242 } else {
4243 std::string TypeString;
4244 RewriteByRefString(TypeString, FieldName, (*I));
4245 TypeString += " *";
4246 FieldName = TypeString + FieldName;
4247 ArgName = TypeString + ArgName;
4248 Constructor += ", " + ArgName;
4249 }
4250 S += FieldName + "; // by ref\n";
4251 }
4252 // Finish writing the constructor.
4253 Constructor += ", int flags=0)";
4254 // Initialize all "by copy" arguments.
4255 bool firsTime = true;
4256 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
4257 E = BlockByCopyDecls.end(); I != E; ++I) {
4258 std::string Name = (*I)->getNameAsString();
4259 if (firsTime) {
4260 Constructor += " : ";
4261 firsTime = false;
4262 }
4263 else
4264 Constructor += ", ";
4265 if (isTopLevelBlockPointerType((*I)->getType()))
4266 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4267 else
4268 Constructor += Name + "(_" + Name + ")";
4269 }
4270 // Initialize all "by ref" arguments.
4271 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
4272 E = BlockByRefDecls.end(); I != E; ++I) {
4273 std::string Name = (*I)->getNameAsString();
4274 if (firsTime) {
4275 Constructor += " : ";
4276 firsTime = false;
4277 }
4278 else
4279 Constructor += ", ";
4280 if (isTopLevelBlockPointerType((*I)->getType()))
4281 Constructor += Name + "((struct __block_impl *)_"
4282 + Name + "->__forwarding)";
4283 else
4284 Constructor += Name + "(_" + Name + "->__forwarding)";
4285 }
4286
4287 Constructor += " {\n";
4288 if (GlobalVarDecl)
4289 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4290 else
4291 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4292 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4293
4294 Constructor += " Desc = desc;\n";
4295 } else {
4296 // Finish writing the constructor.
4297 Constructor += ", int flags=0) {\n";
4298 if (GlobalVarDecl)
4299 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4300 else
4301 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4302 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4303 Constructor += " Desc = desc;\n";
4304 }
4305 Constructor += " ";
4306 Constructor += "}\n";
4307 S += Constructor;
4308 S += "};\n";
4309 return S;
4310 }
4311
4312 std::string RewriteObjC::SynthesizeBlockDescriptor(std::string DescTag,
4313 std::string ImplTag, int i,
4314 const char *FunName,
4315 unsigned hasCopy) {
4316 std::string S = "\nstatic struct " + DescTag;
4317
4318 S += " {\n unsigned long reserved;\n";
4319 S += " unsigned long Block_size;\n";
4320 if (hasCopy) {
4321 S += " void (*copy)(struct ";
4322 S += ImplTag; S += "*, struct ";
4323 S += ImplTag; S += "*);\n";
4324
4325 S += " void (*dispose)(struct ";
4326 S += ImplTag; S += "*);\n";
4327 }
4328 S += "} ";
4329
4330 S += DescTag + "_DATA = { 0, sizeof(struct ";
4331 S += ImplTag + ")";
4332 if (hasCopy) {
4333 S += ", __" + std::string(FunName) + "_block_copy_" + utostr(i);
4334 S += ", __" + std::string(FunName) + "_block_dispose_" + utostr(i);
4335 }
4336 S += "};\n";
4337 return S;
4338 }
4339
4340 void RewriteObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4341 const char *FunName) {
4342 // Insert declaration for the function in which block literal is used.
4343 if (CurFunctionDeclToDeclareForBlock && !Blocks.empty())
4344 RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
4345 bool RewriteSC = (GlobalVarDecl &&
4346 !Blocks.empty() &&
4347 GlobalVarDecl->getStorageClass() == VarDecl::Static &&
4348 GlobalVarDecl->getType().getCVRQualifiers());
4349 if (RewriteSC) {
4350 std::string SC(" void __");
4351 SC += GlobalVarDecl->getNameAsString();
4352 SC += "() {}";
4353 InsertText(FunLocStart, SC);
4354 }
4355
4356 // Insert closures that were part of the function.
4357 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4358 CollectBlockDeclRefInfo(Blocks[i]);
4359 // Need to copy-in the inner copied-in variables not actually used in this
4360 // block.
4361 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4362 BlockDeclRefExpr *Exp = InnerDeclRefs[count++];
4363 ValueDecl *VD = Exp->getDecl();
4364 BlockDeclRefs.push_back(Exp);
4365 if (!Exp->isByRef() && !BlockByCopyDeclsPtrSet.count(VD)) {
4366 BlockByCopyDeclsPtrSet.insert(VD);
4367 BlockByCopyDecls.push_back(VD);
4368 }
4369 if (Exp->isByRef() && !BlockByRefDeclsPtrSet.count(VD)) {
4370 BlockByRefDeclsPtrSet.insert(VD);
4371 BlockByRefDecls.push_back(VD);
4372 }
4373 }
4374
4375 std::string ImplTag = "__" + std::string(FunName) + "_block_impl_" + utostr(i);
4376 std::string DescTag = "__" + std::string(FunName) + "_block_desc_" + utostr(i);
4377
4378 std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
4379
4380 InsertText(FunLocStart, CI);
4381
4382 std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
4383
4384 InsertText(FunLocStart, CF);
4385
4386 if (ImportedBlockDecls.size()) {
4387 std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
4388 InsertText(FunLocStart, HF);
4389 }
4390 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4391 ImportedBlockDecls.size() > 0);
4392 InsertText(FunLocStart, BD);
4393
4394 BlockDeclRefs.clear();
4395 BlockByRefDecls.clear();
4396 BlockByRefDeclsPtrSet.clear();
4397 BlockByCopyDecls.clear();
4398 BlockByCopyDeclsPtrSet.clear();
4399 ImportedBlockDecls.clear();
4400 }
4401 if (RewriteSC) {
4402 // Must insert any 'const/volatile/static here. Since it has been
4403 // removed as result of rewriting of block literals.
4404 std::string SC;
4405 if (GlobalVarDecl->getStorageClass() == VarDecl::Static)
4406 SC = "static ";
4407 if (GlobalVarDecl->getType().isConstQualified())
4408 SC += "const ";
4409 if (GlobalVarDecl->getType().isVolatileQualified())
4410 SC += "volatile ";
4411 if (GlobalVarDecl->getType().isRestrictQualified())
4412 SC += "restrict ";
4413 InsertText(FunLocStart, SC);
4414 }
4415
4416 Blocks.clear();
4417 InnerDeclRefsCount.clear();
4418 InnerDeclRefs.clear();
4419 RewrittenBlockExprs.clear();
4420 }
4421
4422 void RewriteObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4423 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
4424 const char *FuncName = FD->getNameAsCString();
4425
4426 SynthesizeBlockLiterals(FunLocStart, FuncName);
4427 }
4428
4429 static void BuildUniqueMethodName(std::string &Name,
4430 ObjCMethodDecl *MD) {
4431 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4432 Name = IFace->getNameAsCString();
4433 Name += "__" + MD->getSelector().getAsString();
4434 // Convert colons to underscores.
4435 std::string::size_type loc = 0;
4436 while ((loc = Name.find(":", loc)) != std::string::npos)
4437 Name.replace(loc, 1, "_");
4438 }
4439
4440 void RewriteObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4441 //fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4442 //SourceLocation FunLocStart = MD->getLocStart();
4443 SourceLocation FunLocStart = MD->getLocStart();
4444 std::string FuncName;
4445 BuildUniqueMethodName(FuncName, MD);
4446 SynthesizeBlockLiterals(FunLocStart, FuncName.c_str());
4447 }
4448
4449 void RewriteObjC::GetBlockDeclRefExprs(Stmt *S) {
4450 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
4451 CI != E; ++CI)
4452 if (*CI) {
4453 if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI))
4454 GetBlockDeclRefExprs(CBE->getBody());
4455 else
4456 GetBlockDeclRefExprs(*CI);
4457 }
4458 // Handle specific things.
4459 if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(S)) {
4460 // FIXME: Handle enums.
4461 if (!isa<FunctionDecl>(CDRE->getDecl()))
4462 BlockDeclRefs.push_back(CDRE);
4463 }
4464 else if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
4465 if (HasLocalVariableExternalStorage(DRE->getDecl())) {
4466 BlockDeclRefExpr *BDRE =
4467 new (Context)BlockDeclRefExpr(DRE->getDecl(), DRE->getType(),
4468 DRE->getLocation(), false);
4469 BlockDeclRefs.push_back(BDRE);
4470 }
4471
4472 return;
4473 }
4474
4475 void RewriteObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4476 llvm::SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs,
4477 llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
4478 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
4479 CI != E; ++CI)
4480 if (*CI) {
4481 if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
4482 InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
4483 GetInnerBlockDeclRefExprs(CBE->getBody(),
4484 InnerBlockDeclRefs,
4485 InnerContexts);
4486 }
4487 else
4488 GetInnerBlockDeclRefExprs(*CI,
4489 InnerBlockDeclRefs,
4490 InnerContexts);
4491
4492 }
4493 // Handle specific things.
4494 if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(S)) {
4495 if (!isa<FunctionDecl>(CDRE->getDecl()) &&
4496 !InnerContexts.count(CDRE->getDecl()->getDeclContext()))
4497 InnerBlockDeclRefs.push_back(CDRE);
4498 }
4499 else if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4500 if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
4501 if (Var->isFunctionOrMethodVarDecl())
4502 ImportedLocalExternalDecls.insert(Var);
4503 }
4504
4505 return;
4506 }
4507
4508 /// convertFunctionTypeOfBlocks - This routine converts a function type
4509 /// whose result type may be a block pointer or whose argument type(s)
4510 /// might be block pointers to an equivalent funtion type replacing
4511 /// all block pointers to function pointers.
4512 QualType RewriteObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4513 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4514 // FTP will be null for closures that don't take arguments.
4515 // Generate a funky cast.
4516 llvm::SmallVector<QualType, 8> ArgTypes;
4517 QualType Res = FT->getResultType();
4518 bool HasBlockType = convertBlockPointerToFunctionPointer(Res);
4519
4520 if (FTP) {
4521 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
4522 E = FTP->arg_type_end(); I && (I != E); ++I) {
4523 QualType t = *I;
4524 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4525 if (convertBlockPointerToFunctionPointer(t))
4526 HasBlockType = true;
4527 ArgTypes.push_back(t);
4528 }
4529 }
4530 QualType FuncType;
4531 // FIXME. Does this work if block takes no argument but has a return type
4532 // which is of block type?
4533 if (HasBlockType)
4534 FuncType = Context->getFunctionType(Res,
4535 &ArgTypes[0], ArgTypes.size(), false/*no variadic*/, 0,
4536 false, false, 0, 0, FunctionType::ExtInfo());
4537 else FuncType = QualType(FT, 0);
4538 return FuncType;
4539 }
4540
4541 Stmt *RewriteObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4542 // Navigate to relevant type information.
4543 const BlockPointerType *CPT = 0;
4544
4545 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
4546 CPT = DRE->getType()->getAs<BlockPointerType>();
4547 } else if (const BlockDeclRefExpr *CDRE =
4548 dyn_cast<BlockDeclRefExpr>(BlockExp)) {
4549 CPT = CDRE->getType()->getAs<BlockPointerType>();
4550 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
4551 CPT = MExpr->getType()->getAs<BlockPointerType>();
4552 }
4553 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
4554 return SynthesizeBlockCall(Exp, PRE->getSubExpr());
4555 }
4556 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
4557 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4558 else if (const ConditionalOperator *CEXPR =
4559 dyn_cast<ConditionalOperator>(BlockExp)) {
4560 Expr *LHSExp = CEXPR->getLHS();
4561 Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
4562 Expr *RHSExp = CEXPR->getRHS();
4563 Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
4564 Expr *CONDExp = CEXPR->getCond();
4565 ConditionalOperator *CondExpr =
4566 new (Context) ConditionalOperator(CONDExp,
4567 SourceLocation(), cast<Expr>(LHSStmt),
4568 SourceLocation(), cast<Expr>(RHSStmt),
4569 Exp->getType());
4570 return CondExpr;
4571 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
4572 CPT = IRE->getType()->getAs<BlockPointerType>();
4573 } else {
4574 assert(1 && "RewriteBlockClass: Bad type");
4575 }
4576 assert(CPT && "RewriteBlockClass: Bad type");
4577 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4578 assert(FT && "RewriteBlockClass: Bad type");
4579 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4580 // FTP will be null for closures that don't take arguments.
4581
4582 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4583 SourceLocation(),
4584 &Context->Idents.get("__block_impl"));
4585 QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
4586
4587 // Generate a funky cast.
4588 llvm::SmallVector<QualType, 8> ArgTypes;
4589
4590 // Push the block argument type.
4591 ArgTypes.push_back(PtrBlock);
4592 if (FTP) {
4593 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
4594 E = FTP->arg_type_end(); I && (I != E); ++I) {
4595 QualType t = *I;
4596 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4597 (void)convertBlockPointerToFunctionPointer(t);
4598 ArgTypes.push_back(t);
4599 }
4600 }
4601 // Now do the pointer to function cast.
4602 QualType PtrToFuncCastType = Context->getFunctionType(Exp->getType(),
4603 &ArgTypes[0], ArgTypes.size(), false/*no variadic*/, 0,
4604 false, false, 0, 0,
4605 FunctionType::ExtInfo());
4606
4607 PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
4608
4609 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
4610 CastExpr::CK_Unknown,
4611 const_cast<Expr*>(BlockExp));
4612 // Don't forget the parens to enforce the proper binding.
4613 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4614 BlkCast);
4615 //PE->dump();
4616
4617 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
4618 &Context->Idents.get("FuncPtr"), Context->VoidPtrTy, 0,
4619 /*BitWidth=*/0, /*Mutable=*/true);
4620 MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
4621 FD->getType());
4622
4623 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4624 CastExpr::CK_Unknown, ME);
4625 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4626
4627 llvm::SmallVector<Expr*, 8> BlkExprs;
4628 // Add the implicit argument.
4629 BlkExprs.push_back(BlkCast);
4630 // Add the user arguments.
4631 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4632 E = Exp->arg_end(); I != E; ++I) {
4633 BlkExprs.push_back(*I);
4634 }
4635 CallExpr *CE = new (Context) CallExpr(*Context, PE, &BlkExprs[0],
4636 BlkExprs.size(),
4637 Exp->getType(), SourceLocation());
4638 return CE;
4639 }
4640
4641 // We need to return the rewritten expression to handle cases where the
4642 // BlockDeclRefExpr is embedded in another expression being rewritten.
4643 // For example:
4644 //
4645 // int main() {
4646 // __block Foo *f;
4647 // __block int i;
4648 //
4649 // void (^myblock)() = ^() {
4650 // [f test]; // f is a BlockDeclRefExpr embedded in a message (which is being rewritten).
4651 // i = 77;
4652 // };
4653 //}
4654 Stmt *RewriteObjC::RewriteBlockDeclRefExpr(Expr *DeclRefExp) {
4655 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4656 // for each DeclRefExp where BYREFVAR is name of the variable.
4657 ValueDecl *VD;
4658 bool isArrow = true;
4659 if (BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(DeclRefExp))
4660 VD = BDRE->getDecl();
4661 else {
4662 VD = cast<DeclRefExpr>(DeclRefExp)->getDecl();
4663 isArrow = false;
4664 }
4665
4666 FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
4667 &Context->Idents.get("__forwarding"),
4668 Context->VoidPtrTy, 0,
4669 /*BitWidth=*/0, /*Mutable=*/true);
4670 MemberExpr *ME = new (Context) MemberExpr(DeclRefExp, isArrow,
4671 FD, SourceLocation(),
4672 FD->getType());
4673
4674 const char *Name = VD->getNameAsCString();
4675 FD = FieldDecl::Create(*Context, 0, SourceLocation(),
4676 &Context->Idents.get(Name),
4677 Context->VoidPtrTy, 0,
4678 /*BitWidth=*/0, /*Mutable=*/true);
4679 ME = new (Context) MemberExpr(ME, true, FD, SourceLocation(),
4680 DeclRefExp->getType());
4681
4682
4683
4684 // Need parens to enforce precedence.
4685 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4686 ME);
4687 ReplaceStmt(DeclRefExp, PE);
4688 return PE;
4689 }
4690
4691 // Rewrites the imported local variable V with external storage
4692 // (static, extern, etc.) as *V
4693 //
4694 Stmt *RewriteObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4695 ValueDecl *VD = DRE->getDecl();
4696 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4697 if (!ImportedLocalExternalDecls.count(Var))
4698 return DRE;
4699 Expr *Exp = new (Context) UnaryOperator(DRE, UnaryOperator::Deref,
4700 DRE->getType(), DRE->getLocation());
4701 // Need parens to enforce precedence.
4702 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4703 Exp);
4704 ReplaceStmt(DRE, PE);
4705 return PE;
4706 }
4707
4708 void RewriteObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4709 SourceLocation LocStart = CE->getLParenLoc();
4710 SourceLocation LocEnd = CE->getRParenLoc();
4711
4712 // Need to avoid trying to rewrite synthesized casts.
4713 if (LocStart.isInvalid())
4714 return;
4715 // Need to avoid trying to rewrite casts contained in macros.
4716 if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
4717 return;
4718
4719 const char *startBuf = SM->getCharacterData(LocStart);
4720 const char *endBuf = SM->getCharacterData(LocEnd);
4721 QualType QT = CE->getType();
4722 const Type* TypePtr = QT->getAs<Type>();
4723 if (isa<TypeOfExprType>(TypePtr)) {
4724 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
4725 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4726 std::string TypeAsString = "(";
4727 RewriteBlockPointerType(TypeAsString, QT);
4728 TypeAsString += ")";
4729 ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
4730 return;
4731 }
4732 // advance the location to startArgList.
4733 const char *argPtr = startBuf;
4734
4735 while (*argPtr++ && (argPtr < endBuf)) {
4736 switch (*argPtr) {
4737 case '^':
4738 // Replace the '^' with '*'.
4739 LocStart = LocStart.getFileLocWithOffset(argPtr-startBuf);
4740 ReplaceText(LocStart, 1, "*");
4741 break;
4742 }
4743 }
4744 return;
4745 }
4746
4747 void RewriteObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4748 SourceLocation DeclLoc = FD->getLocation();
4749 unsigned parenCount = 0;
4750
4751 // We have 1 or more arguments that have closure pointers.
4752 const char *startBuf = SM->getCharacterData(DeclLoc);
4753 const char *startArgList = strchr(startBuf, '(');
4754
4755 assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
4756
4757 parenCount++;
4758 // advance the location to startArgList.
4759 DeclLoc = DeclLoc.getFileLocWithOffset(startArgList-startBuf);
4760 assert((DeclLoc.isValid()) && "Invalid DeclLoc");
4761
4762 const char *argPtr = startArgList;
4763
4764 while (*argPtr++ && parenCount) {
4765 switch (*argPtr) {
4766 case '^':
4767 // Replace the '^' with '*'.
4768 DeclLoc = DeclLoc.getFileLocWithOffset(argPtr-startArgList);
4769 ReplaceText(DeclLoc, 1, "*");
4770 break;
4771 case '(':
4772 parenCount++;
4773 break;
4774 case ')':
4775 parenCount--;
4776 break;
4777 }
4778 }
4779 return;
4780 }
4781
4782 bool RewriteObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4783 const FunctionProtoType *FTP;
4784 const PointerType *PT = QT->getAs<PointerType>();
4785 if (PT) {
4786 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4787 } else {
4788 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4789 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
4790 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4791 }
4792 if (FTP) {
4793 for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
4794 E = FTP->arg_type_end(); I != E; ++I)
4795 if (isTopLevelBlockPointerType(*I))
4796 return true;
4797 }
4798 return false;
4799 }
4800
4801 void RewriteObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4802 const char *&RParen) {
4803 const char *argPtr = strchr(Name, '(');
4804 assert((*argPtr == '(') && "Rewriter fuzzy parser confused");
4805
4806 LParen = argPtr; // output the start.
4807 argPtr++; // skip past the left paren.
4808 unsigned parenCount = 1;
4809
4810 while (*argPtr && parenCount) {
4811 switch (*argPtr) {
4812 case '(': parenCount++; break;
4813 case ')': parenCount--; break;
4814 default: break;
4815 }
4816 if (parenCount) argPtr++;
4817 }
4818 assert((*argPtr == ')') && "Rewriter fuzzy parser confused");
4819 RParen = argPtr; // output the end
4820 }
4821
4822 void RewriteObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4823 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4824 RewriteBlockPointerFunctionArgs(FD);
4825 return;
4826 }
4827 // Handle Variables and Typedefs.
4828 SourceLocation DeclLoc = ND->getLocation();
4829 QualType DeclT;
4830 if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4831 DeclT = VD->getType();
4832 else if (TypedefDecl *TDD = dyn_cast<TypedefDecl>(ND))
4833 DeclT = TDD->getUnderlyingType();
4834 else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4835 DeclT = FD->getType();
4836 else
4837 assert(0 && "RewriteBlockPointerDecl(): Decl type not yet handled");
4838
4839 const char *startBuf = SM->getCharacterData(DeclLoc);
4840 const char *endBuf = startBuf;
4841 // scan backward (from the decl location) for the end of the previous decl.
4842 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4843 startBuf--;
4844
4845 // *startBuf != '^' if we are dealing with a pointer to function that
4846 // may take block argument types (which will be handled below).
4847 if (*startBuf == '^') {
4848 // Replace the '^' with '*', computing a negative offset.
4849 DeclLoc = DeclLoc.getFileLocWithOffset(startBuf-endBuf);
4850 ReplaceText(DeclLoc, 1, "*");
4851 }
4852 if (PointerTypeTakesAnyBlockArguments(DeclT)) {
4853 // Replace the '^' with '*' for arguments.
4854 DeclLoc = ND->getLocation();
4855 startBuf = SM->getCharacterData(DeclLoc);
4856 const char *argListBegin, *argListEnd;
4857 GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4858 while (argListBegin < argListEnd) {
4859 if (*argListBegin == '^') {
4860 SourceLocation CaretLoc = DeclLoc.getFileLocWithOffset(argListBegin-startBuf);
4861 ReplaceText(CaretLoc, 1, "*");
4862 }
4863 argListBegin++;
4864 }
4865 }
4866 return;
4867 }
4868
4869
4870 /// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4871 /// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4872 /// struct Block_byref_id_object *src) {
4873 /// _Block_object_assign (&_dest->object, _src->object,
4874 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4875 /// [|BLOCK_FIELD_IS_WEAK]) // object
4876 /// _Block_object_assign(&_dest->object, _src->object,
4877 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4878 /// [|BLOCK_FIELD_IS_WEAK]) // block
4879 /// }
4880 /// And:
4881 /// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4882 /// _Block_object_dispose(_src->object,
4883 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4884 /// [|BLOCK_FIELD_IS_WEAK]) // object
4885 /// _Block_object_dispose(_src->object,
4886 /// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4887 /// [|BLOCK_FIELD_IS_WEAK]) // block
4888 /// }
4889
4890 std::string RewriteObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4891 int flag) {
4892 std::string S;
4893 if (CopyDestroyCache.count(flag))
4894 return S;
4895 CopyDestroyCache.insert(flag);
4896 S = "static void __Block_byref_id_object_copy_";
4897 S += utostr(flag);
4898 S += "(void *dst, void *src) {\n";
4899
4900 // offset into the object pointer is computed as:
4901 // void * + void* + int + int + void* + void *
4902 unsigned IntSize =
4903 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4904 unsigned VoidPtrSize =
4905 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4906
4907 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/8;
4908 S += " _Block_object_assign((char*)dst + ";
4909 S += utostr(offset);
4910 S += ", *(void * *) ((char*)src + ";
4911 S += utostr(offset);
4912 S += "), ";
4913 S += utostr(flag);
4914 S += ");\n}\n";
4915
4916 S += "static void __Block_byref_id_object_dispose_";
4917 S += utostr(flag);
4918 S += "(void *src) {\n";
4919 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4920 S += utostr(offset);
4921 S += "), ";
4922 S += utostr(flag);
4923 S += ");\n}\n";
4924 return S;
4925 }
4926
4927 /// RewriteByRefVar - For each __block typex ND variable this routine transforms
4928 /// the declaration into:
4929 /// struct __Block_byref_ND {
4930 /// void *__isa; // NULL for everything except __weak pointers
4931 /// struct __Block_byref_ND *__forwarding;
4932 /// int32_t __flags;
4933 /// int32_t __size;
4934 /// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
4935 /// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
4936 /// typex ND;
4937 /// };
4938 ///
4939 /// It then replaces declaration of ND variable with:
4940 /// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
4941 /// __size=sizeof(struct __Block_byref_ND),
4942 /// ND=initializer-if-any};
4943 ///
4944 ///
4945 void RewriteObjC::RewriteByRefVar(VarDecl *ND) {
4946 // Insert declaration for the function in which block literal is
4947 // used.
4948 if (CurFunctionDeclToDeclareForBlock)
4949 RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
4950 int flag = 0;
4951 int isa = 0;
4952 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
4953 if (DeclLoc.isInvalid())
4954 // If type location is missing, it is because of missing type (a warning).
4955 // Use variable's location which is good for this case.
4956 DeclLoc = ND->getLocation();
4957 const char *startBuf = SM->getCharacterData(DeclLoc);
4958 SourceLocation X = ND->getLocEnd();
4959 X = SM->getInstantiationLoc(X);
4960 const char *endBuf = SM->getCharacterData(X);
4961 std::string Name(ND->getNameAsString());
4962 std::string ByrefType;
4963 RewriteByRefString(ByrefType, Name, ND);
4964 ByrefType += " {\n";
4965 ByrefType += " void *__isa;\n";
4966 RewriteByRefString(ByrefType, Name, ND);
4967 ByrefType += " *__forwarding;\n";
4968 ByrefType += " int __flags;\n";
4969 ByrefType += " int __size;\n";
4970 // Add void *__Block_byref_id_object_copy;
4971 // void *__Block_byref_id_object_dispose; if needed.
4972 QualType Ty = ND->getType();
4973 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty);
4974 if (HasCopyAndDispose) {
4975 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
4976 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
4977 }
4978
4979 Ty.getAsStringInternal(Name, Context->PrintingPolicy);
4980 ByrefType += " " + Name + ";\n";
4981 ByrefType += "};\n";
4982 // Insert this type in global scope. It is needed by helper function.
4983 SourceLocation FunLocStart;
4984 if (CurFunctionDef)
4985 FunLocStart = CurFunctionDef->getTypeSpecStartLoc();
4986 else {
4987 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
4988 FunLocStart = CurMethodDef->getLocStart();
4989 }
4990 InsertText(FunLocStart, ByrefType);
4991 if (Ty.isObjCGCWeak()) {
4992 flag |= BLOCK_FIELD_IS_WEAK;
4993 isa = 1;
4994 }
4995
4996 if (HasCopyAndDispose) {
4997 flag = BLOCK_BYREF_CALLER;
4998 QualType Ty = ND->getType();
4999 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5000 if (Ty->isBlockPointerType())
5001 flag |= BLOCK_FIELD_IS_BLOCK;
5002 else
5003 flag |= BLOCK_FIELD_IS_OBJECT;
5004 std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
5005 if (!HF.empty())
5006 InsertText(FunLocStart, HF);
5007 }
5008
5009 // struct __Block_byref_ND ND =
5010 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5011 // initializer-if-any};
5012 bool hasInit = (ND->getInit() != 0);
5013 unsigned flags = 0;
5014 if (HasCopyAndDispose)
5015 flags |= BLOCK_HAS_COPY_DISPOSE;
5016 Name = ND->getNameAsString();
5017 ByrefType.clear();
5018 RewriteByRefString(ByrefType, Name, ND);
5019 std::string ForwardingCastType("(");
5020 ForwardingCastType += ByrefType + " *)";
5021 if (!hasInit) {
5022 ByrefType += " " + Name + " = {(void*)";
5023 ByrefType += utostr(isa);
5024 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5025 ByrefType += utostr(flags);
5026 ByrefType += ", ";
5027 ByrefType += "sizeof(";
5028 RewriteByRefString(ByrefType, Name, ND);
5029 ByrefType += ")";
5030 if (HasCopyAndDispose) {
5031 ByrefType += ", __Block_byref_id_object_copy_";
5032 ByrefType += utostr(flag);
5033 ByrefType += ", __Block_byref_id_object_dispose_";
5034 ByrefType += utostr(flag);
5035 }
5036 ByrefType += "};\n";
5037 ReplaceText(DeclLoc, endBuf-startBuf+Name.size(), ByrefType);
5038 }
5039 else {
5040 SourceLocation startLoc;
5041 Expr *E = ND->getInit();
5042 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
5043 startLoc = ECE->getLParenLoc();
5044 else
5045 startLoc = E->getLocStart();
5046 startLoc = SM->getInstantiationLoc(startLoc);
5047 endBuf = SM->getCharacterData(startLoc);
5048 ByrefType += " " + Name;
5049 ByrefType += " = {(void*)";
5050 ByrefType += utostr(isa);
5051 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5052 ByrefType += utostr(flags);
5053 ByrefType += ", ";
5054 ByrefType += "sizeof(";
5055 RewriteByRefString(ByrefType, Name, ND);
5056 ByrefType += "), ";
5057 if (HasCopyAndDispose) {
5058 ByrefType += "__Block_byref_id_object_copy_";
5059 ByrefType += utostr(flag);
5060 ByrefType += ", __Block_byref_id_object_dispose_";
5061 ByrefType += utostr(flag);
5062 ByrefType += ", ";
5063 }
5064 ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
5065
5066 // Complete the newly synthesized compound expression by inserting a right
5067 // curly brace before the end of the declaration.
5068 // FIXME: This approach avoids rewriting the initializer expression. It
5069 // also assumes there is only one declarator. For example, the following
5070 // isn't currently supported by this routine (in general):
5071 //
5072 // double __block BYREFVAR = 1.34, BYREFVAR2 = 1.37;
5073 //
5074 const char *startInitializerBuf = SM->getCharacterData(startLoc);
5075 const char *semiBuf = strchr(startInitializerBuf, ';');
5076 assert((*semiBuf == ';') && "RewriteByRefVar: can't find ';'");
5077 SourceLocation semiLoc =
5078 startLoc.getFileLocWithOffset(semiBuf-startInitializerBuf);
5079
5080 InsertText(semiLoc, "}");
5081 }
5082 return;
5083 }
5084
5085 void RewriteObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5086 // Add initializers for any closure decl refs.
5087 GetBlockDeclRefExprs(Exp->getBody());
5088 if (BlockDeclRefs.size()) {
5089 // Unique all "by copy" declarations.
5090 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5091 if (!BlockDeclRefs[i]->isByRef()) {
5092 if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5093 BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5094 BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
5095 }
5096 }
5097 // Unique all "by ref" declarations.
5098 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5099 if (BlockDeclRefs[i]->isByRef()) {
5100 if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5101 BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5102 BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
5103 }
5104 }
5105 // Find any imported blocks...they will need special attention.
5106 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5107 if (BlockDeclRefs[i]->isByRef() ||
5108 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5109 BlockDeclRefs[i]->getType()->isBlockPointerType())
5110 ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
5111 }
5112 }
5113
5114 FunctionDecl *RewriteObjC::SynthBlockInitFunctionDecl(const char *name) {
5115 IdentifierInfo *ID = &Context->Idents.get(name);
5116 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
5117 return FunctionDecl::Create(*Context, TUDecl,SourceLocation(),
5118 ID, FType, 0, FunctionDecl::Extern,
5119 FunctionDecl::None, false, false);
5120 }
5121
5122 Stmt *RewriteObjC::SynthBlockInitExpr(BlockExpr *Exp,
5123 const llvm::SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs) {
5124 Blocks.push_back(Exp);
5125
5126 CollectBlockDeclRefInfo(Exp);
5127
5128 // Add inner imported variables now used in current block.
5129 int countOfInnerDecls = 0;
5130 if (!InnerBlockDeclRefs.empty()) {
5131 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5132 BlockDeclRefExpr *Exp = InnerBlockDeclRefs[i];
5133 ValueDecl *VD = Exp->getDecl();
5134 if (!Exp->isByRef() && !BlockByCopyDeclsPtrSet.count(VD)) {
5135 // We need to save the copied-in variables in nested
5136 // blocks because it is needed at the end for some of the API generations.
5137 // See SynthesizeBlockLiterals routine.
5138 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5139 BlockDeclRefs.push_back(Exp);
5140 BlockByCopyDeclsPtrSet.insert(VD);
5141 BlockByCopyDecls.push_back(VD);
5142 }
5143 if (Exp->isByRef() && !BlockByRefDeclsPtrSet.count(VD)) {
5144 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5145 BlockDeclRefs.push_back(Exp);
5146 BlockByRefDeclsPtrSet.insert(VD);
5147 BlockByRefDecls.push_back(VD);
5148 }
5149 }
5150 // Find any imported blocks...they will need special attention.
5151 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5152 if (InnerBlockDeclRefs[i]->isByRef() ||
5153 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5154 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5155 ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
5156 }
5157 InnerDeclRefsCount.push_back(countOfInnerDecls);
5158
5159 std::string FuncName;
5160
5161 if (CurFunctionDef)
5162 FuncName = CurFunctionDef->getNameAsString();
5163 else if (CurMethodDef)
5164 BuildUniqueMethodName(FuncName, CurMethodDef);
5165 else if (GlobalVarDecl)
5166 FuncName = std::string(GlobalVarDecl->getNameAsString());
5167
5168 std::string BlockNumber = utostr(Blocks.size()-1);
5169
5170 std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber;
5171 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5172
5173 // Get a pointer to the function type so we can cast appropriately.
5174 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
5175 QualType FType = Context->getPointerType(BFT);
5176
5177 FunctionDecl *FD;
5178 Expr *NewRep;
5179
5180 // Simulate a contructor call...
5181 FD = SynthBlockInitFunctionDecl(Tag.c_str());
5182 DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, FType, SourceLocation());
5183
5184 llvm::SmallVector<Expr*, 4> InitExprs;
5185
5186 // Initialize the block function.
5187 FD = SynthBlockInitFunctionDecl(Func.c_str());
5188 DeclRefExpr *Arg = new (Context) DeclRefExpr(FD, FD->getType(),
5189 SourceLocation());
5190 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5191 CastExpr::CK_Unknown, Arg);
5192 InitExprs.push_back(castExpr);
5193
5194 // Initialize the block descriptor.
5195 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5196
5197 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
5198 &Context->Idents.get(DescData.c_str()),
5199 Context->VoidPtrTy, 0,
5200 VarDecl::Static, VarDecl::None);
5201 UnaryOperator *DescRefExpr = new (Context) UnaryOperator(
5202 new (Context) DeclRefExpr(NewVD,
5203 Context->VoidPtrTy, SourceLocation()),
5204 UnaryOperator::AddrOf,
5205 Context->getPointerType(Context->VoidPtrTy),
5206 SourceLocation());
5207 InitExprs.push_back(DescRefExpr);
5208
5209 // Add initializers for any closure decl refs.
5210 if (BlockDeclRefs.size()) {
5211 Expr *Exp;
5212 // Output all "by copy" declarations.
5213 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
5214 E = BlockByCopyDecls.end(); I != E; ++I) {
5215 if (isObjCType((*I)->getType())) {
5216 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5217 FD = SynthBlockInitFunctionDecl((*I)->getNameAsCString());
5218 Exp = new (Context) DeclRefExpr(FD, FD->getType(), SourceLocation());
5219 if (HasLocalVariableExternalStorage(*I)) {
5220 QualType QT = (*I)->getType();
5221 QT = Context->getPointerType(QT);
5222 Exp = new (Context) UnaryOperator(Exp, UnaryOperator::AddrOf, QT,
5223 SourceLocation());
5224 }
5225 } else if (isTopLevelBlockPointerType((*I)->getType())) {
5226 FD = SynthBlockInitFunctionDecl((*I)->getNameAsCString());
5227 Arg = new (Context) DeclRefExpr(FD, FD->getType(), SourceLocation());
5228 Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5229 CastExpr::CK_Unknown, Arg);
5230 } else {
5231 FD = SynthBlockInitFunctionDecl((*I)->getNameAsCString());
5232 Exp = new (Context) DeclRefExpr(FD, FD->getType(), SourceLocation());
5233 if (HasLocalVariableExternalStorage(*I)) {
5234 QualType QT = (*I)->getType();
5235 QT = Context->getPointerType(QT);
5236 Exp = new (Context) UnaryOperator(Exp, UnaryOperator::AddrOf, QT,
5237 SourceLocation());
5238 }
5239
5240 }
5241 InitExprs.push_back(Exp);
5242 }
5243 // Output all "by ref" declarations.
5244 for (llvm::SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
5245 E = BlockByRefDecls.end(); I != E; ++I) {
5246 ValueDecl *ND = (*I);
5247 std::string Name(ND->getNameAsString());
5248 std::string RecName;
5249 RewriteByRefString(RecName, Name, ND);
5250 IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
5251 + sizeof("struct"));
5252 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5253 SourceLocation(), II);
5254 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
5255 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5256
5257 FD = SynthBlockInitFunctionDecl((*I)->getNameAsCString());
5258 Exp = new (Context) DeclRefExpr(FD, FD->getType(), SourceLocation());
5259 Exp = new (Context) UnaryOperator(Exp, UnaryOperator::AddrOf,
5260 Context->getPointerType(Exp->getType()),
5261 SourceLocation());
5262 Exp = NoTypeInfoCStyleCastExpr(Context, castT, CastExpr::CK_Unknown, Exp);
5263 InitExprs.push_back(Exp);
5264 }
5265 }
5266 if (ImportedBlockDecls.size()) {
5267 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5268 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5269 unsigned IntSize =
5270 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5271 Expr *FlagExp = new (Context) IntegerLiteral(llvm::APInt(IntSize, flag),
5272 Context->IntTy, SourceLocation());
5273 InitExprs.push_back(FlagExp);
5274 }
5275 NewRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0], InitExprs.size(),
5276 FType, SourceLocation());
5277 NewRep = new (Context) UnaryOperator(NewRep, UnaryOperator::AddrOf,
5278 Context->getPointerType(NewRep->getType()),
5279 SourceLocation());
5280 NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CastExpr::CK_Unknown,
5281 NewRep);
5282 BlockDeclRefs.clear();
5283 BlockByRefDecls.clear();
5284 BlockByRefDeclsPtrSet.clear();
5285 BlockByCopyDecls.clear();
5286 BlockByCopyDeclsPtrSet.clear();
5287 ImportedBlockDecls.clear();
5288 return NewRep;
5289 }
5290
5291 //===----------------------------------------------------------------------===//
5292 // Function Body / Expression rewriting
5293 //===----------------------------------------------------------------------===//
5294
5295 // This is run as a first "pass" prior to RewriteFunctionBodyOrGlobalInitializer().
5296 // The allows the main rewrite loop to associate all ObjCPropertyRefExprs with
5297 // their respective BinaryOperator. Without this knowledge, we'd need to rewrite
5298 // the ObjCPropertyRefExpr twice (once as a getter, and later as a setter).
5299 // Since the rewriter isn't capable of rewriting rewritten code, it's important
5300 // we get this right.
5301 void RewriteObjC::CollectPropertySetters(Stmt *S) {
5302 // Perform a bottom up traversal of all children.
5303 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
5304 CI != E; ++CI)
5305 if (*CI)
5306 CollectPropertySetters(*CI);
5307
5308 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(S)) {
5309 if (BinOp->isAssignmentOp()) {
5310 if (ObjCPropertyRefExpr *PRE = dyn_cast<ObjCPropertyRefExpr>(BinOp->getLHS()))
5311 PropSetters[PRE] = BinOp;
5312 }
5313 }
5314 }
5315
5316 Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5317 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5318 isa<DoStmt>(S) || isa<ForStmt>(S))
5319 Stmts.push_back(S);
5320 else if (isa<ObjCForCollectionStmt>(S)) {
5321 Stmts.push_back(S);
5322 ObjCBcLabelNo.push_back(++BcLabelCount);
5323 }
5324
5325 SourceRange OrigStmtRange = S->getSourceRange();
5326
5327 // Perform a bottom up rewrite of all children.
5328 for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
5329 CI != E; ++CI)
5330 if (*CI) {
5331 Stmt *newStmt;
5332 Stmt *S = (*CI);
5333 if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
5334 Expr *OldBase = IvarRefExpr->getBase();
5335 bool replaced = false;
5336 newStmt = RewriteObjCNestedIvarRefExpr(S, replaced);
5337 if (replaced) {
5338 if (ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(newStmt))
5339 ReplaceStmt(OldBase, IRE->getBase());
5340 else
5341 ReplaceStmt(S, newStmt);
5342 }
5343 }
5344 else
5345 newStmt = RewriteFunctionBodyOrGlobalInitializer(S);
5346 if (newStmt)
5347 *CI = newStmt;
5348 }
5349
5350 if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
5351 llvm::SmallVector<BlockDeclRefExpr *, 8> InnerBlockDeclRefs;
5352 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5353 InnerContexts.insert(BE->getBlockDecl());
5354 ImportedLocalExternalDecls.clear();
5355 GetInnerBlockDeclRefExprs(BE->getBody(),
5356 InnerBlockDeclRefs, InnerContexts);
5357 // Rewrite the block body in place.
5358 RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
5359 ImportedLocalExternalDecls.clear();
5360 // Now we snarf the rewritten text and stash it away for later use.
5361 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
5362 RewrittenBlockExprs[BE] = Str;
5363
5364 Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
5365
5366 //blockTranscribed->dump();
5367 ReplaceStmt(S, blockTranscribed);
5368 return blockTranscribed;
5369 }
5370 // Handle specific things.
5371 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
5372 return RewriteAtEncode(AtEncode);
5373
5374 if (ObjCPropertyRefExpr *PropRefExpr = dyn_cast<ObjCPropertyRefExpr>(S)) {
5375 BinaryOperator *BinOp = PropSetters[PropRefExpr];
5376 if (BinOp) {
5377 // Because the rewriter doesn't allow us to rewrite rewritten code,
5378 // we need to rewrite the right hand side prior to rewriting the setter.
5379 DisableReplaceStmt = true;
5380 // Save the source range. Even if we disable the replacement, the
5381 // rewritten node will have been inserted into the tree. If the synthesized
5382 // node is at the 'end', the rewriter will fail. Consider this:
5383 // self.errorHandler = handler ? handler :
5384 // ^(NSURL *errorURL, NSError *error) { return (BOOL)1; };
5385 SourceRange SrcRange = BinOp->getSourceRange();
5386 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(BinOp->getRHS());
5387 DisableReplaceStmt = false;
5388 //
5389 // Unlike the main iterator, we explicily avoid changing 'BinOp'. If
5390 // we changed the RHS of BinOp, the rewriter would fail (since it needs
5391 // to see the original expression). Consider this example:
5392 //
5393 // Foo *obj1, *obj2;
5394 //
5395 // obj1.i = [obj2 rrrr];
5396 //
5397 // 'BinOp' for the previous expression looks like:
5398 //
5399 // (BinaryOperator 0x231ccf0 'int' '='
5400 // (ObjCPropertyRefExpr 0x231cc70 'int' Kind=PropertyRef Property="i"
5401 // (DeclRefExpr 0x231cc50 'Foo *' Var='obj1' 0x231cbb0))
5402 // (ObjCMessageExpr 0x231ccb0 'int' selector=rrrr
5403 // (DeclRefExpr 0x231cc90 'Foo *' Var='obj2' 0x231cbe0)))
5404 //
5405 // 'newStmt' represents the rewritten message expression. For example:
5406 //
5407 // (CallExpr 0x231d300 'id':'struct objc_object *'
5408 // (ParenExpr 0x231d2e0 'int (*)(id, SEL)'
5409 // (CStyleCastExpr 0x231d2c0 'int (*)(id, SEL)'
5410 // (CStyleCastExpr 0x231d220 'void *'
5411 // (DeclRefExpr 0x231d200 'id (id, SEL, ...)' FunctionDecl='objc_msgSend' 0x231cdc0))))
5412 //
5413 // Note that 'newStmt' is passed to RewritePropertySetter so that it
5414 // can be used as the setter argument. ReplaceStmt() will still 'see'
5415 // the original RHS (since we haven't altered BinOp).
5416 //
5417 // This implies the Rewrite* routines can no longer delete the original
5418 // node. As a result, we now leak the original AST nodes.
5419 //
5420 return RewritePropertySetter(BinOp, dyn_cast<Expr>(newStmt), SrcRange);
5421 } else {
5422 return RewritePropertyGetter(PropRefExpr);
5423 }
5424 }
5425 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
5426 return RewriteAtSelector(AtSelector);
5427
5428 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
5429 return RewriteObjCStringLiteral(AtString);
5430
5431 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
5432 #if 0
5433 // Before we rewrite it, put the original message expression in a comment.
5434 SourceLocation startLoc = MessExpr->getLocStart();
5435 SourceLocation endLoc = MessExpr->getLocEnd();
5436
5437 const char *startBuf = SM->getCharacterData(startLoc);
5438 const char *endBuf = SM->getCharacterData(endLoc);
5439
5440 std::string messString;
5441 messString += "// ";
5442 messString.append(startBuf, endBuf-startBuf+1);
5443 messString += "\n";
5444
5445 // FIXME: Missing definition of
5446 // InsertText(clang::SourceLocation, char const*, unsigned int).
5447 // InsertText(startLoc, messString.c_str(), messString.size());
5448 // Tried this, but it didn't work either...
5449 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5450 #endif
5451 return RewriteMessageExpr(MessExpr);
5452 }
5453
5454 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
5455 return RewriteObjCTryStmt(StmtTry);
5456
5457 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
5458 return RewriteObjCSynchronizedStmt(StmtTry);
5459
5460 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
5461 return RewriteObjCThrowStmt(StmtThrow);
5462
5463 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
5464 return RewriteObjCProtocolExpr(ProtocolExp);
5465
5466 if (ObjCForCollectionStmt *StmtForCollection =
5467 dyn_cast<ObjCForCollectionStmt>(S))
5468 return RewriteObjCForCollectionStmt(StmtForCollection,
5469 OrigStmtRange.getEnd());
5470 if (BreakStmt *StmtBreakStmt =
5471 dyn_cast<BreakStmt>(S))
5472 return RewriteBreakStmt(StmtBreakStmt);
5473 if (ContinueStmt *StmtContinueStmt =
5474 dyn_cast<ContinueStmt>(S))
5475 return RewriteContinueStmt(StmtContinueStmt);
5476
5477 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5478 // and cast exprs.
5479 if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
5480 // FIXME: What we're doing here is modifying the type-specifier that
5481 // precedes the first Decl. In the future the DeclGroup should have
5482 // a separate type-specifier that we can rewrite.
5483 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5484 // the context of an ObjCForCollectionStmt. For example:
5485 // NSArray *someArray;
5486 // for (id <FooProtocol> index in someArray) ;
5487 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5488 // and it depends on the original text locations/positions.
5489 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
5490 RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
5491
5492 // Blocks rewrite rules.
5493 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5494 DI != DE; ++DI) {
5495 Decl *SD = *DI;
5496 if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
5497 if (isTopLevelBlockPointerType(ND->getType()))
5498 RewriteBlockPointerDecl(ND);
5499 else if (ND->getType()->isFunctionPointerType())
5500 CheckFunctionPointerDecl(ND->getType(), ND);
5501 if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
5502 if (VD->hasAttr<BlocksAttr>()) {
5503 static unsigned uniqueByrefDeclCount = 0;
5504 assert(!BlockByRefDeclNo.count(ND) &&
5505 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
5506 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5507 RewriteByRefVar(VD);
5508 }
5509 else
5510 RewriteTypeOfDecl(VD);
5511 }
5512 }
5513 if (TypedefDecl *TD = dyn_cast<TypedefDecl>(SD)) {
5514 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5515 RewriteBlockPointerDecl(TD);
5516 else if (TD->getUnderlyingType()->isFunctionPointerType())
5517 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5518 }
5519 }
5520 }
5521
5522 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
5523 RewriteObjCQualifiedInterfaceTypes(CE);
5524
5525 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5526 isa<DoStmt>(S) || isa<ForStmt>(S)) {
5527 assert(!Stmts.empty() && "Statement stack is empty");
5528 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
5529 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
5530 && "Statement stack mismatch");
5531 Stmts.pop_back();
5532 }
5533 // Handle blocks rewriting.
5534 if (BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(S)) {
5535 if (BDRE->isByRef())
5536 return RewriteBlockDeclRefExpr(BDRE);
5537 }
5538 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
5539 ValueDecl *VD = DRE->getDecl();
5540 if (VD->hasAttr<BlocksAttr>())
5541 return RewriteBlockDeclRefExpr(DRE);
5542 if (HasLocalVariableExternalStorage(VD))
5543 return RewriteLocalVariableExternalStorage(DRE);
5544 }
5545
5546 if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
5547 if (CE->getCallee()->getType()->isBlockPointerType()) {
5548 Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
5549 ReplaceStmt(S, BlockCall);
5550 return BlockCall;
5551 }
5552 }
5553 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
5554 RewriteCastExpr(CE);
5555 }
5556 #if 0
5557 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5558 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5559 ICE->getSubExpr(),
5560 SourceLocation());
5561 // Get the new text.
5562 std::string SStr;
5563 llvm::raw_string_ostream Buf(SStr);
5564 Replacement->printPretty(Buf, *Context);
5565 const std::string &Str = Buf.str();
5566
5567 printf("CAST = %s\n", &Str[0]);
5568 InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size());
5569 delete S;
5570 return Replacement;
5571 }
5572 #endif
5573 // Return this stmt unmodified.
5574 return S;
5575 }
5576
5577 void RewriteObjC::RewriteRecordBody(RecordDecl *RD) {
5578 for (RecordDecl::field_iterator i = RD->field_begin(),
5579 e = RD->field_end(); i != e; ++i) {
5580 FieldDecl *FD = *i;
5581 if (isTopLevelBlockPointerType(FD->getType()))
5582 RewriteBlockPointerDecl(FD);
5583 if (FD->getType()->isObjCQualifiedIdType() ||
5584 FD->getType()->isObjCQualifiedInterfaceType())
5585 RewriteObjCQualifiedInterfaceTypes(FD);
5586 }
5587 }
5588
5589 /// HandleDeclInMainFile - This is called for each top-level decl defined in the
5590 /// main file of the input.
5591 void RewriteObjC::HandleDeclInMainFile(Decl *D) {
5592 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
5593 if (FD->isOverloadedOperator())
5594 return;
5595
5596 // Since function prototypes don't have ParmDecl's, we check the function
5597 // prototype. This enables us to rewrite function declarations and
5598 // definitions using the same code.
5599 RewriteBlocksInFunctionProtoType(FD->getType(), FD);
5600
5601 // FIXME: If this should support Obj-C++, support CXXTryStmt
5602 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
5603 CurFunctionDef = FD;
5604 CurFunctionDeclToDeclareForBlock = FD;
5605 CollectPropertySetters(Body);
5606 CurrentBody = Body;
5607 Body =
5608 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5609 FD->setBody(Body);
5610 CurrentBody = 0;
5611 if (PropParentMap) {
5612 delete PropParentMap;
5613 PropParentMap = 0;
5614 }
5615 // This synthesizes and inserts the block "impl" struct, invoke function,
5616 // and any copy/dispose helper functions.
5617 InsertBlockLiteralsWithinFunction(FD);
5618 CurFunctionDef = 0;
5619 CurFunctionDeclToDeclareForBlock = 0;
5620 }
5621 return;
5622 }
5623 if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
5624 if (CompoundStmt *Body = MD->getCompoundBody()) {
5625 CurMethodDef = MD;
5626 CollectPropertySetters(Body);
5627 CurrentBody = Body;
5628 Body =
5629 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5630 MD->setBody(Body);
5631 CurrentBody = 0;
5632 if (PropParentMap) {
5633 delete PropParentMap;
5634 PropParentMap = 0;
5635 }
5636 InsertBlockLiteralsWithinMethod(MD);
5637 CurMethodDef = 0;
5638 }
5639 }
5640 if (ObjCImplementationDecl *CI = dyn_cast<ObjCImplementationDecl>(D))
5641 ClassImplementation.push_back(CI);
5642 else if (ObjCCategoryImplDecl *CI = dyn_cast<ObjCCategoryImplDecl>(D))
5643 CategoryImplementation.push_back(CI);
5644 else if (ObjCClassDecl *CD = dyn_cast<ObjCClassDecl>(D))
5645 RewriteForwardClassDecl(CD);
5646 else if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
5647 RewriteObjCQualifiedInterfaceTypes(VD);
5648 if (isTopLevelBlockPointerType(VD->getType()))
5649 RewriteBlockPointerDecl(VD);
5650 else if (VD->getType()->isFunctionPointerType()) {
5651 CheckFunctionPointerDecl(VD->getType(), VD);
5652 if (VD->getInit()) {
5653 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5654 RewriteCastExpr(CE);
5655 }
5656 }
5657 } else if (VD->getType()->isRecordType()) {
5658 RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
5659 if (RD->isDefinition())
5660 RewriteRecordBody(RD);
5661 }
5662 if (VD->getInit()) {
5663 GlobalVarDecl = VD;
5664 CollectPropertySetters(VD->getInit());
5665 CurrentBody = VD->getInit();
5666 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
5667 CurrentBody = 0;
5668 if (PropParentMap) {
5669 delete PropParentMap;
5670 PropParentMap = 0;
5671 }
5672 SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(),
5673 VD->getNameAsCString());
5674 GlobalVarDecl = 0;
5675
5676 // This is needed for blocks.
5677 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5678 RewriteCastExpr(CE);
5679 }
5680 }
5681 return;
5682 }
5683 if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
5684 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5685 RewriteBlockPointerDecl(TD);
5686 else if (TD->getUnderlyingType()->isFunctionPointerType())
5687 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5688 return;
5689 }
5690 if (RecordDecl *RD = dyn_cast<RecordDecl>(D)) {
5691 if (RD->isDefinition())
5692 RewriteRecordBody(RD);
5693 return;
5694 }
5695 // Nothing yet.
5696 }
5697
5698 void RewriteObjC::HandleTranslationUnit(ASTContext &C) {
5699 if (Diags.hasErrorOccurred())
5700 return;
5701
5702 RewriteInclude();
5703
5704 // Here's a great place to add any extra declarations that may be needed.
5705 // Write out meta data for each @protocol(<expr>).
5706 for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
5707 E = ProtocolExprDecls.end(); I != E; ++I)
5708 RewriteObjCProtocolMetaData(*I, "", "", Preamble);
5709
5710 InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
5711 if (ClassImplementation.size() || CategoryImplementation.size())
5712 RewriteImplementations();
5713
5714 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
5715 // we are done.
5716 if (const RewriteBuffer *RewriteBuf =
5717 Rewrite.getRewriteBufferFor(MainFileID)) {
5718 //printf("Changed:\n");
5719 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
5720 } else {
5721 llvm::errs() << "No changes\n";
5722 }
5723
5724 if (ClassImplementation.size() || CategoryImplementation.size() ||
5725 ProtocolExprDecls.size()) {
5726 // Rewrite Objective-c meta data*
5727 std::string ResultStr;
5728 SynthesizeMetaDataIntoBuffer(ResultStr);
5729 // Emit metadata.
5730 *OutFile << ResultStr;
5731 }
5732 OutFile->flush();
5733 }
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