| //===--- RewriteBlocks.cpp ----------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Hacks and fun related to the closure rewriter. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Frontend/ASTConsumers.h" |
| #include "clang/Rewrite/Rewriter.h" |
| #include "clang/AST/AST.h" |
| #include "clang/AST/ASTConsumer.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "clang/Basic/IdentifierTable.h" |
| #include "clang/Basic/Diagnostic.h" |
| #include "clang/Basic/LangOptions.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| #include <sstream> |
| |
| using namespace clang; |
| using llvm::utostr; |
| |
| namespace { |
| |
| class RewriteBlocks : public ASTConsumer { |
| Rewriter Rewrite; |
| Diagnostic &Diags; |
| const LangOptions &LangOpts; |
| unsigned RewriteFailedDiag; |
| |
| ASTContext *Context; |
| SourceManager *SM; |
| FileID MainFileID; |
| const char *MainFileStart, *MainFileEnd; |
| |
| // Block expressions. |
| llvm::SmallVector<BlockExpr *, 32> Blocks; |
| llvm::SmallVector<BlockDeclRefExpr *, 32> BlockDeclRefs; |
| llvm::DenseMap<BlockDeclRefExpr *, CallExpr *> BlockCallExprs; |
| |
| // Block related declarations. |
| llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDecls; |
| llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDecls; |
| llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls; |
| |
| llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs; |
| |
| // The function/method we are rewriting. |
| FunctionDecl *CurFunctionDef; |
| ObjCMethodDecl *CurMethodDef; |
| |
| bool IsHeader; |
| |
| std::string Preamble; |
| public: |
| RewriteBlocks(std::string inFile, Diagnostic &D, |
| const LangOptions &LOpts); |
| ~RewriteBlocks() { |
| // Get the buffer corresponding to MainFileID. |
| // If we haven't changed it, then we are done. |
| if (const RewriteBuffer *RewriteBuf = |
| Rewrite.getRewriteBufferFor(MainFileID)) { |
| std::string S(RewriteBuf->begin(), RewriteBuf->end()); |
| printf("%s\n", S.c_str()); |
| } else { |
| printf("No changes\n"); |
| } |
| } |
| |
| void Initialize(ASTContext &context); |
| |
| void InsertText(SourceLocation Loc, const char *StrData, unsigned StrLen); |
| void ReplaceText(SourceLocation Start, unsigned OrigLength, |
| const char *NewStr, unsigned NewLength); |
| |
| // Top Level Driver code. |
| virtual void HandleTopLevelDecl(DeclGroupRef D) { |
| for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) |
| HandleTopLevelSingleDecl(*I); |
| } |
| void HandleTopLevelSingleDecl(Decl *D); |
| void HandleDeclInMainFile(Decl *D); |
| |
| // Top level |
| Stmt *RewriteFunctionBody(Stmt *S); |
| void InsertBlockLiteralsWithinFunction(FunctionDecl *FD); |
| void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD); |
| |
| // Block specific rewrite rules. |
| std::string SynthesizeBlockInitExpr(BlockExpr *Exp, VarDecl *VD=0); |
| |
| void RewriteBlockCall(CallExpr *Exp); |
| void RewriteBlockPointerDecl(NamedDecl *VD); |
| void RewriteBlockDeclRefExpr(BlockDeclRefExpr *VD); |
| void RewriteBlockPointerFunctionArgs(FunctionDecl *FD); |
| |
| std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i, |
| const char *funcName, std::string Tag); |
| std::string SynthesizeBlockFunc(BlockExpr *CE, int i, |
| const char *funcName, std::string Tag); |
| std::string SynthesizeBlockImpl(BlockExpr *CE, std::string Tag, |
| bool hasCopyDisposeHelpers); |
| std::string SynthesizeBlockCall(CallExpr *Exp); |
| void SynthesizeBlockLiterals(SourceLocation FunLocStart, |
| const char *FunName); |
| |
| void CollectBlockDeclRefInfo(BlockExpr *Exp); |
| void GetBlockCallExprs(Stmt *S); |
| void GetBlockDeclRefExprs(Stmt *S); |
| |
| // We avoid calling Type::isBlockPointerType(), since it operates on the |
| // canonical type. We only care if the top-level type is a closure pointer. |
| bool isBlockPointerType(QualType T) { return isa<BlockPointerType>(T); } |
| |
| // FIXME: This predicate seems like it would be useful to add to ASTContext. |
| bool isObjCType(QualType T) { |
| if (!LangOpts.ObjC1 && !LangOpts.ObjC2) |
| return false; |
| |
| QualType OCT = Context->getCanonicalType(T).getUnqualifiedType(); |
| |
| if (OCT == Context->getCanonicalType(Context->getObjCIdType()) || |
| OCT == Context->getCanonicalType(Context->getObjCClassType())) |
| return true; |
| |
| if (const PointerType *PT = OCT->getAs<PointerType>()) { |
| if (isa<ObjCInterfaceType>(PT->getPointeeType()) || |
| PT->getPointeeType()->isObjCQualifiedIdType()) |
| return true; |
| } |
| return false; |
| } |
| // ObjC rewrite methods. |
| void RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl); |
| void RewriteCategoryDecl(ObjCCategoryDecl *CatDecl); |
| void RewriteProtocolDecl(ObjCProtocolDecl *PDecl); |
| void RewriteMethodDecl(ObjCMethodDecl *MDecl); |
| |
| void RewriteFunctionProtoType(QualType funcType, NamedDecl *D); |
| void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND); |
| void RewriteCastExpr(CastExpr *CE); |
| |
| bool PointerTypeTakesAnyBlockArguments(QualType QT); |
| void GetExtentOfArgList(const char *Name, const char *&LParen, const char *&RParen); |
| }; |
| |
| } |
| |
| static bool IsHeaderFile(const std::string &Filename) { |
| std::string::size_type DotPos = Filename.rfind('.'); |
| |
| if (DotPos == std::string::npos) { |
| // no file extension |
| return false; |
| } |
| |
| std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end()); |
| // C header: .h |
| // C++ header: .hh or .H; |
| return Ext == "h" || Ext == "hh" || Ext == "H"; |
| } |
| |
| RewriteBlocks::RewriteBlocks(std::string inFile, |
| Diagnostic &D, const LangOptions &LOpts) : |
| Diags(D), LangOpts(LOpts) { |
| IsHeader = IsHeaderFile(inFile); |
| CurFunctionDef = 0; |
| CurMethodDef = 0; |
| RewriteFailedDiag = Diags.getCustomDiagID(Diagnostic::Warning, |
| "rewriting failed"); |
| } |
| |
| ASTConsumer *clang::CreateBlockRewriter(const std::string& InFile, |
| Diagnostic &Diags, |
| const LangOptions &LangOpts) { |
| return new RewriteBlocks(InFile, Diags, LangOpts); |
| } |
| |
| void RewriteBlocks::Initialize(ASTContext &context) { |
| Context = &context; |
| SM = &Context->getSourceManager(); |
| |
| // Get the ID and start/end of the main file. |
| MainFileID = SM->getMainFileID(); |
| const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID); |
| MainFileStart = MainBuf->getBufferStart(); |
| MainFileEnd = MainBuf->getBufferEnd(); |
| |
| Rewrite.setSourceMgr(Context->getSourceManager(), LangOpts); |
| |
| if (IsHeader) |
| Preamble = "#pragma once\n"; |
| Preamble += "#ifndef BLOCK_IMPL\n"; |
| Preamble += "#define BLOCK_IMPL\n"; |
| Preamble += "struct __block_impl {\n"; |
| Preamble += " void *isa;\n"; |
| Preamble += " int Flags;\n"; |
| Preamble += " int Size;\n"; |
| Preamble += " void *FuncPtr;\n"; |
| Preamble += "};\n"; |
| Preamble += "enum {\n"; |
| Preamble += " BLOCK_HAS_COPY_DISPOSE = (1<<25),\n"; |
| Preamble += " BLOCK_IS_GLOBAL = (1<<28)\n"; |
| Preamble += "};\n"; |
| if (LangOpts.Microsoft) |
| Preamble += "#define __OBJC_RW_EXTERN extern \"C\" __declspec(dllimport)\n"; |
| else |
| Preamble += "#define __OBJC_RW_EXTERN extern\n"; |
| Preamble += "// Runtime copy/destroy helper functions\n"; |
| Preamble += "__OBJC_RW_EXTERN void _Block_copy_assign(void *, void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void _Block_byref_assign_copy(void *, void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void _Block_destroy(void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void _Block_byref_release(void *);\n"; |
| Preamble += "__OBJC_RW_EXTERN void *_NSConcreteGlobalBlock;\n"; |
| Preamble += "__OBJC_RW_EXTERN void *_NSConcreteStackBlock;\n"; |
| Preamble += "#endif\n"; |
| |
| InsertText(SM->getLocForStartOfFile(MainFileID), |
| Preamble.c_str(), Preamble.size()); |
| } |
| |
| void RewriteBlocks::InsertText(SourceLocation Loc, const char *StrData, |
| unsigned StrLen) |
| { |
| if (!Rewrite.InsertText(Loc, StrData, StrLen)) |
| return; |
| Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag); |
| } |
| |
| void RewriteBlocks::ReplaceText(SourceLocation Start, unsigned OrigLength, |
| const char *NewStr, unsigned NewLength) { |
| if (!Rewrite.ReplaceText(Start, OrigLength, |
| llvm::StringRef(NewStr, NewLength))) |
| return; |
| Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag); |
| } |
| |
| void RewriteBlocks::RewriteMethodDecl(ObjCMethodDecl *Method) { |
| bool haveBlockPtrs = false; |
| for (ObjCMethodDecl::param_iterator I = Method->param_begin(), |
| E = Method->param_end(); I != E; ++I) |
| if (isBlockPointerType((*I)->getType())) |
| haveBlockPtrs = true; |
| |
| if (!haveBlockPtrs) |
| return; |
| |
| // Do a fuzzy rewrite. |
| // We have 1 or more arguments that have closure pointers. |
| SourceLocation Loc = Method->getLocStart(); |
| SourceLocation LocEnd = Method->getLocEnd(); |
| const char *startBuf = SM->getCharacterData(Loc); |
| const char *endBuf = SM->getCharacterData(LocEnd); |
| |
| const char *methodPtr = startBuf; |
| std::string Tag = "struct __block_impl *"; |
| |
| while (*methodPtr++ && (methodPtr != endBuf)) { |
| switch (*methodPtr) { |
| case ':': |
| methodPtr++; |
| if (*methodPtr == '(') { |
| const char *scanType = ++methodPtr; |
| bool foundBlockPointer = false; |
| unsigned parenCount = 1; |
| |
| while (parenCount) { |
| switch (*scanType) { |
| case '(': |
| parenCount++; |
| break; |
| case ')': |
| parenCount--; |
| break; |
| case '^': |
| foundBlockPointer = true; |
| break; |
| } |
| scanType++; |
| } |
| if (foundBlockPointer) { |
| // advance the location to startArgList. |
| Loc = Loc.getFileLocWithOffset(methodPtr-startBuf); |
| assert((Loc.isValid()) && "Invalid Loc"); |
| ReplaceText(Loc, scanType-methodPtr-1, Tag.c_str(), Tag.size()); |
| |
| // Advance startBuf. Since the underlying buffer has changed, |
| // it's very important to advance startBuf (so we can correctly |
| // compute a relative Loc the next time around). |
| startBuf = methodPtr; |
| } |
| // Advance the method ptr to the end of the type. |
| methodPtr = scanType; |
| } |
| break; |
| } |
| } |
| return; |
| } |
| |
| void RewriteBlocks::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) { |
| for (ObjCInterfaceDecl::instmeth_iterator |
| I = ClassDecl->instmeth_begin(), E = ClassDecl->instmeth_end(); |
| I != E; ++I) |
| RewriteMethodDecl(*I); |
| for (ObjCInterfaceDecl::classmeth_iterator |
| I = ClassDecl->classmeth_begin(), E = ClassDecl->classmeth_end(); |
| I != E; ++I) |
| RewriteMethodDecl(*I); |
| } |
| |
| void RewriteBlocks::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) { |
| for (ObjCCategoryDecl::instmeth_iterator |
| I = CatDecl->instmeth_begin(), E = CatDecl->instmeth_end(); |
| I != E; ++I) |
| RewriteMethodDecl(*I); |
| for (ObjCCategoryDecl::classmeth_iterator |
| I = CatDecl->classmeth_begin(), E = CatDecl->classmeth_end(); |
| I != E; ++I) |
| RewriteMethodDecl(*I); |
| } |
| |
| void RewriteBlocks::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) { |
| for (ObjCProtocolDecl::instmeth_iterator |
| I = PDecl->instmeth_begin(), E = PDecl->instmeth_end(); |
| I != E; ++I) |
| RewriteMethodDecl(*I); |
| for (ObjCProtocolDecl::classmeth_iterator |
| I = PDecl->classmeth_begin(), E = PDecl->classmeth_end(); |
| I != E; ++I) |
| RewriteMethodDecl(*I); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Top Level Driver Code |
| //===----------------------------------------------------------------------===// |
| |
| void RewriteBlocks::HandleTopLevelSingleDecl(Decl *D) { |
| // Two cases: either the decl could be in the main file, or it could be in a |
| // #included file. If the former, rewrite it now. If the later, check to see |
| // if we rewrote the #include/#import. |
| SourceLocation Loc = D->getLocation(); |
| Loc = SM->getInstantiationLoc(Loc); |
| |
| // If this is for a builtin, ignore it. |
| if (Loc.isInvalid()) return; |
| |
| if (ObjCInterfaceDecl *MD = dyn_cast<ObjCInterfaceDecl>(D)) |
| RewriteInterfaceDecl(MD); |
| else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) |
| RewriteCategoryDecl(CD); |
| else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) |
| RewriteProtocolDecl(PD); |
| |
| // If we have a decl in the main file, see if we should rewrite it. |
| if (SM->isFromMainFile(Loc)) |
| HandleDeclInMainFile(D); |
| return; |
| } |
| |
| std::string RewriteBlocks::SynthesizeBlockFunc(BlockExpr *CE, int i, |
| const char *funcName, |
| std::string Tag) { |
| const FunctionType *AFT = CE->getFunctionType(); |
| QualType RT = AFT->getResultType(); |
| std::string StructRef = "struct " + Tag; |
| std::string S = "static " + RT.getAsString() + " __" + |
| funcName + "_" + "block_func_" + utostr(i); |
| |
| BlockDecl *BD = CE->getBlockDecl(); |
| |
| if (isa<FunctionNoProtoType>(AFT)) { |
| S += "()"; |
| } else if (BD->param_empty()) { |
| S += "(" + StructRef + " *__cself)"; |
| } else { |
| const FunctionProtoType *FT = cast<FunctionProtoType>(AFT); |
| assert(FT && "SynthesizeBlockFunc: No function proto"); |
| S += '('; |
| // first add the implicit argument. |
| S += StructRef + " *__cself, "; |
| std::string ParamStr; |
| for (BlockDecl::param_iterator AI = BD->param_begin(), |
| E = BD->param_end(); AI != E; ++AI) { |
| if (AI != BD->param_begin()) S += ", "; |
| ParamStr = (*AI)->getNameAsString(); |
| (*AI)->getType().getAsStringInternal(ParamStr, Context->PrintingPolicy); |
| S += ParamStr; |
| } |
| if (FT->isVariadic()) { |
| if (!BD->param_empty()) S += ", "; |
| S += "..."; |
| } |
| S += ')'; |
| } |
| S += " {\n"; |
| |
| // Create local declarations to avoid rewriting all closure decl ref exprs. |
| // First, emit a declaration for all "by ref" decls. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(), |
| E = BlockByRefDecls.end(); I != E; ++I) { |
| S += " "; |
| std::string Name = (*I)->getNameAsString(); |
| Context->getPointerType((*I)->getType()).getAsStringInternal(Name, |
| Context->PrintingPolicy); |
| S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n"; |
| } |
| // Next, emit a declaration for all "by copy" declarations. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(), |
| E = BlockByCopyDecls.end(); I != E; ++I) { |
| S += " "; |
| std::string Name = (*I)->getNameAsString(); |
| // Handle nested closure invocation. For example: |
| // |
| // void (^myImportedClosure)(void); |
| // myImportedClosure = ^(void) { setGlobalInt(x + y); }; |
| // |
| // void (^anotherClosure)(void); |
| // anotherClosure = ^(void) { |
| // myImportedClosure(); // import and invoke the closure |
| // }; |
| // |
| if (isBlockPointerType((*I)->getType())) |
| S += "struct __block_impl *"; |
| else |
| (*I)->getType().getAsStringInternal(Name, Context->PrintingPolicy); |
| S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by copy\n"; |
| } |
| std::string RewrittenStr = RewrittenBlockExprs[CE]; |
| const char *cstr = RewrittenStr.c_str(); |
| while (*cstr++ != '{') ; |
| S += cstr; |
| S += "\n"; |
| return S; |
| } |
| |
| std::string RewriteBlocks::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i, |
| const char *funcName, |
| std::string Tag) { |
| std::string StructRef = "struct " + Tag; |
| std::string S = "static void __"; |
| |
| S += funcName; |
| S += "_block_copy_" + utostr(i); |
| S += "(" + StructRef; |
| S += "*dst, " + StructRef; |
| S += "*src) {"; |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(), |
| E = ImportedBlockDecls.end(); I != E; ++I) { |
| S += "_Block_copy_assign(&dst->"; |
| S += (*I)->getNameAsString(); |
| S += ", src->"; |
| S += (*I)->getNameAsString(); |
| S += ");}"; |
| } |
| S += "\nstatic void __"; |
| S += funcName; |
| S += "_block_dispose_" + utostr(i); |
| S += "(" + StructRef; |
| S += "*src) {"; |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(), |
| E = ImportedBlockDecls.end(); I != E; ++I) { |
| S += "_Block_destroy(src->"; |
| S += (*I)->getNameAsString(); |
| S += ");"; |
| } |
| S += "}\n"; |
| return S; |
| } |
| |
| std::string RewriteBlocks::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag, |
| bool hasCopyDisposeHelpers) { |
| std::string S = "struct " + Tag; |
| std::string Constructor = " " + Tag; |
| |
| S += " {\n struct __block_impl impl;\n"; |
| |
| if (hasCopyDisposeHelpers) |
| S += " void *copy;\n void *dispose;\n"; |
| |
| Constructor += "(void *fp"; |
| |
| if (hasCopyDisposeHelpers) |
| Constructor += ", void *copyHelp, void *disposeHelp"; |
| |
| if (BlockDeclRefs.size()) { |
| // Output all "by copy" declarations. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(), |
| E = BlockByCopyDecls.end(); I != E; ++I) { |
| S += " "; |
| std::string FieldName = (*I)->getNameAsString(); |
| std::string ArgName = "_" + FieldName; |
| // Handle nested closure invocation. For example: |
| // |
| // void (^myImportedBlock)(void); |
| // myImportedBlock = ^(void) { setGlobalInt(x + y); }; |
| // |
| // void (^anotherBlock)(void); |
| // anotherBlock = ^(void) { |
| // myImportedBlock(); // import and invoke the closure |
| // }; |
| // |
| if (isBlockPointerType((*I)->getType())) { |
| S += "struct __block_impl *"; |
| Constructor += ", void *" + ArgName; |
| } else { |
| (*I)->getType().getAsStringInternal(FieldName, Context->PrintingPolicy); |
| (*I)->getType().getAsStringInternal(ArgName, Context->PrintingPolicy); |
| Constructor += ", " + ArgName; |
| } |
| S += FieldName + ";\n"; |
| } |
| // Output all "by ref" declarations. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(), |
| E = BlockByRefDecls.end(); I != E; ++I) { |
| S += " "; |
| std::string FieldName = (*I)->getNameAsString(); |
| std::string ArgName = "_" + FieldName; |
| // Handle nested closure invocation. For example: |
| // |
| // void (^myImportedBlock)(void); |
| // myImportedBlock = ^(void) { setGlobalInt(x + y); }; |
| // |
| // void (^anotherBlock)(void); |
| // anotherBlock = ^(void) { |
| // myImportedBlock(); // import and invoke the closure |
| // }; |
| // |
| if (isBlockPointerType((*I)->getType())) { |
| S += "struct __block_impl *"; |
| Constructor += ", void *" + ArgName; |
| } else { |
| Context->getPointerType((*I)->getType()).getAsStringInternal(FieldName, |
| Context->PrintingPolicy); |
| Context->getPointerType((*I)->getType()).getAsStringInternal(ArgName, |
| Context->PrintingPolicy); |
| Constructor += ", " + ArgName; |
| } |
| S += FieldName + "; // by ref\n"; |
| } |
| // Finish writing the constructor. |
| // FIXME: handle NSConcreteGlobalBlock. |
| Constructor += ", int flags=0) {\n"; |
| Constructor += " impl.isa = 0/*&_NSConcreteStackBlock*/;\n impl.Size = sizeof("; |
| Constructor += Tag + ");\n impl.Flags = flags;\n impl.FuncPtr = fp;\n"; |
| |
| if (hasCopyDisposeHelpers) |
| Constructor += " copy = copyHelp;\n dispose = disposeHelp;\n"; |
| |
| // Initialize all "by copy" arguments. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(), |
| E = BlockByCopyDecls.end(); I != E; ++I) { |
| std::string Name = (*I)->getNameAsString(); |
| Constructor += " "; |
| if (isBlockPointerType((*I)->getType())) |
| Constructor += Name + " = (struct __block_impl *)_"; |
| else |
| Constructor += Name + " = _"; |
| Constructor += Name + ";\n"; |
| } |
| // Initialize all "by ref" arguments. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(), |
| E = BlockByRefDecls.end(); I != E; ++I) { |
| std::string Name = (*I)->getNameAsString(); |
| Constructor += " "; |
| if (isBlockPointerType((*I)->getType())) |
| Constructor += Name + " = (struct __block_impl *)_"; |
| else |
| Constructor += Name + " = _"; |
| Constructor += Name + ";\n"; |
| } |
| } else { |
| // Finish writing the constructor. |
| // FIXME: handle NSConcreteGlobalBlock. |
| Constructor += ", int flags=0) {\n"; |
| Constructor += " impl.isa = 0/*&_NSConcreteStackBlock*/;\n impl.Size = sizeof("; |
| Constructor += Tag + ");\n impl.Flags = flags;\n impl.FuncPtr = fp;\n"; |
| if (hasCopyDisposeHelpers) |
| Constructor += " copy = copyHelp;\n dispose = disposeHelp;\n"; |
| } |
| Constructor += " "; |
| Constructor += "}\n"; |
| S += Constructor; |
| S += "};\n"; |
| return S; |
| } |
| |
| void RewriteBlocks::SynthesizeBlockLiterals(SourceLocation FunLocStart, |
| const char *FunName) { |
| // Insert closures that were part of the function. |
| for (unsigned i = 0; i < Blocks.size(); i++) { |
| |
| CollectBlockDeclRefInfo(Blocks[i]); |
| |
| std::string Tag = "__" + std::string(FunName) + "_block_impl_" + utostr(i); |
| |
| std::string CI = SynthesizeBlockImpl(Blocks[i], Tag, |
| ImportedBlockDecls.size() > 0); |
| |
| InsertText(FunLocStart, CI.c_str(), CI.size()); |
| |
| std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, Tag); |
| |
| InsertText(FunLocStart, CF.c_str(), CF.size()); |
| |
| if (ImportedBlockDecls.size()) { |
| std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, Tag); |
| InsertText(FunLocStart, HF.c_str(), HF.size()); |
| } |
| |
| BlockDeclRefs.clear(); |
| BlockByRefDecls.clear(); |
| BlockByCopyDecls.clear(); |
| BlockCallExprs.clear(); |
| ImportedBlockDecls.clear(); |
| } |
| Blocks.clear(); |
| RewrittenBlockExprs.clear(); |
| } |
| |
| void RewriteBlocks::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) { |
| SourceLocation FunLocStart = FD->getTypeSpecStartLoc(); |
| const char *FuncName = FD->getNameAsCString(); |
| |
| SynthesizeBlockLiterals(FunLocStart, FuncName); |
| } |
| |
| void RewriteBlocks::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) { |
| SourceLocation FunLocStart = MD->getLocStart(); |
| std::string FuncName = MD->getSelector().getAsString(); |
| // Convert colons to underscores. |
| std::string::size_type loc = 0; |
| while ((loc = FuncName.find(":", loc)) != std::string::npos) |
| FuncName.replace(loc, 1, "_"); |
| |
| SynthesizeBlockLiterals(FunLocStart, FuncName.c_str()); |
| } |
| |
| void RewriteBlocks::GetBlockDeclRefExprs(Stmt *S) { |
| for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end(); |
| CI != E; ++CI) |
| if (*CI) { |
| if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) |
| GetBlockDeclRefExprs(CBE->getBody()); |
| else |
| GetBlockDeclRefExprs(*CI); |
| } |
| // Handle specific things. |
| if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(S)) |
| // FIXME: Handle enums. |
| if (!isa<FunctionDecl>(CDRE->getDecl())) |
| BlockDeclRefs.push_back(CDRE); |
| return; |
| } |
| |
| void RewriteBlocks::GetBlockCallExprs(Stmt *S) { |
| for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end(); |
| CI != E; ++CI) |
| if (*CI) { |
| if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) |
| GetBlockCallExprs(CBE->getBody()); |
| else |
| GetBlockCallExprs(*CI); |
| } |
| |
| if (CallExpr *CE = dyn_cast<CallExpr>(S)) { |
| if (CE->getCallee()->getType()->isBlockPointerType()) { |
| BlockCallExprs[dyn_cast<BlockDeclRefExpr>(CE->getCallee())] = CE; |
| } |
| } |
| return; |
| } |
| |
| std::string RewriteBlocks::SynthesizeBlockCall(CallExpr *Exp) { |
| // Navigate to relevant type information. |
| const char *closureName = 0; |
| const BlockPointerType *CPT = 0; |
| |
| if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Exp->getCallee())) { |
| closureName = DRE->getDecl()->getNameAsCString(); |
| CPT = DRE->getType()->getAs<BlockPointerType>(); |
| } else if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(Exp->getCallee())) { |
| closureName = CDRE->getDecl()->getNameAsCString(); |
| CPT = CDRE->getType()->getAs<BlockPointerType>(); |
| } else if (MemberExpr *MExpr = dyn_cast<MemberExpr>(Exp->getCallee())) { |
| closureName = MExpr->getMemberDecl()->getNameAsCString(); |
| CPT = MExpr->getType()->getAs<BlockPointerType>(); |
| } else { |
| assert(1 && "RewriteBlockClass: Bad type"); |
| } |
| assert(CPT && "RewriteBlockClass: Bad type"); |
| const FunctionType *FT = CPT->getPointeeType()->getAsFunctionType(); |
| assert(FT && "RewriteBlockClass: Bad type"); |
| const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT); |
| // FTP will be null for closures that don't take arguments. |
| |
| // Build a closure call - start with a paren expr to enforce precedence. |
| std::string BlockCall = "("; |
| |
| // Synthesize the cast. |
| BlockCall += "(" + Exp->getType().getAsString() + "(*)"; |
| BlockCall += "(struct __block_impl *"; |
| if (FTP) { |
| for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(), |
| E = FTP->arg_type_end(); I && (I != E); ++I) |
| BlockCall += ", " + (*I).getAsString(); |
| } |
| BlockCall += "))"; // close the argument list and paren expression. |
| |
| // Invoke the closure. We need to cast it since the declaration type is |
| // bogus (it's a function pointer type) |
| BlockCall += "((struct __block_impl *)"; |
| std::string closureExprBufStr; |
| llvm::raw_string_ostream closureExprBuf(closureExprBufStr); |
| Exp->getCallee()->printPretty(closureExprBuf, *Context, 0, |
| PrintingPolicy(LangOpts)); |
| BlockCall += closureExprBuf.str(); |
| BlockCall += ")->FuncPtr)"; |
| |
| // Add the arguments. |
| BlockCall += "((struct __block_impl *)"; |
| BlockCall += closureExprBuf.str(); |
| for (CallExpr::arg_iterator I = Exp->arg_begin(), |
| E = Exp->arg_end(); I != E; ++I) { |
| std::string syncExprBufS; |
| llvm::raw_string_ostream Buf(syncExprBufS); |
| (*I)->printPretty(Buf, *Context, 0, PrintingPolicy(LangOpts)); |
| BlockCall += ", " + Buf.str(); |
| } |
| return BlockCall; |
| } |
| |
| void RewriteBlocks::RewriteBlockCall(CallExpr *Exp) { |
| std::string BlockCall = SynthesizeBlockCall(Exp); |
| |
| const char *startBuf = SM->getCharacterData(Exp->getLocStart()); |
| const char *endBuf = SM->getCharacterData(Exp->getLocEnd()); |
| |
| ReplaceText(Exp->getLocStart(), endBuf-startBuf, |
| BlockCall.c_str(), BlockCall.size()); |
| } |
| |
| void RewriteBlocks::RewriteBlockDeclRefExpr(BlockDeclRefExpr *BDRE) { |
| // FIXME: Add more elaborate code generation required by the ABI. |
| InsertText(BDRE->getLocStart(), "*", 1); |
| } |
| |
| void RewriteBlocks::RewriteCastExpr(CastExpr *CE) { |
| SourceLocation LocStart = CE->getLocStart(); |
| SourceLocation LocEnd = CE->getLocEnd(); |
| |
| if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd)) |
| return; |
| |
| const char *startBuf = SM->getCharacterData(LocStart); |
| const char *endBuf = SM->getCharacterData(LocEnd); |
| |
| // advance the location to startArgList. |
| const char *argPtr = startBuf; |
| |
| while (*argPtr++ && (argPtr < endBuf)) { |
| switch (*argPtr) { |
| case '^': |
| // Replace the '^' with '*'. |
| LocStart = LocStart.getFileLocWithOffset(argPtr-startBuf); |
| ReplaceText(LocStart, 1, "*", 1); |
| break; |
| } |
| } |
| return; |
| } |
| |
| void RewriteBlocks::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) { |
| SourceLocation DeclLoc = FD->getLocation(); |
| unsigned parenCount = 0; |
| |
| // We have 1 or more arguments that have closure pointers. |
| const char *startBuf = SM->getCharacterData(DeclLoc); |
| const char *startArgList = strchr(startBuf, '('); |
| |
| assert((*startArgList == '(') && "Rewriter fuzzy parser confused"); |
| |
| parenCount++; |
| // advance the location to startArgList. |
| DeclLoc = DeclLoc.getFileLocWithOffset(startArgList-startBuf); |
| assert((DeclLoc.isValid()) && "Invalid DeclLoc"); |
| |
| const char *argPtr = startArgList; |
| |
| while (*argPtr++ && parenCount) { |
| switch (*argPtr) { |
| case '^': |
| // Replace the '^' with '*'. |
| DeclLoc = DeclLoc.getFileLocWithOffset(argPtr-startArgList); |
| ReplaceText(DeclLoc, 1, "*", 1); |
| break; |
| case '(': |
| parenCount++; |
| break; |
| case ')': |
| parenCount--; |
| break; |
| } |
| } |
| return; |
| } |
| |
| bool RewriteBlocks::PointerTypeTakesAnyBlockArguments(QualType QT) { |
| const FunctionProtoType *FTP; |
| const PointerType *PT = QT->getAs<PointerType>(); |
| if (PT) { |
| FTP = PT->getPointeeType()->getAsFunctionProtoType(); |
| } else { |
| const BlockPointerType *BPT = QT->getAs<BlockPointerType>(); |
| assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"); |
| FTP = BPT->getPointeeType()->getAsFunctionProtoType(); |
| } |
| if (FTP) { |
| for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(), |
| E = FTP->arg_type_end(); I != E; ++I) |
| if (isBlockPointerType(*I)) |
| return true; |
| } |
| return false; |
| } |
| |
| void RewriteBlocks::GetExtentOfArgList(const char *Name, |
| const char *&LParen, const char *&RParen) { |
| const char *argPtr = strchr(Name, '('); |
| assert((*argPtr == '(') && "Rewriter fuzzy parser confused"); |
| |
| LParen = argPtr; // output the start. |
| argPtr++; // skip past the left paren. |
| unsigned parenCount = 1; |
| |
| while (*argPtr && parenCount) { |
| switch (*argPtr) { |
| case '(': parenCount++; break; |
| case ')': parenCount--; break; |
| default: break; |
| } |
| if (parenCount) argPtr++; |
| } |
| assert((*argPtr == ')') && "Rewriter fuzzy parser confused"); |
| RParen = argPtr; // output the end |
| } |
| |
| void RewriteBlocks::RewriteBlockPointerDecl(NamedDecl *ND) { |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) { |
| RewriteBlockPointerFunctionArgs(FD); |
| return; |
| } |
| // Handle Variables and Typedefs. |
| SourceLocation DeclLoc = ND->getLocation(); |
| QualType DeclT; |
| if (VarDecl *VD = dyn_cast<VarDecl>(ND)) |
| DeclT = VD->getType(); |
| else if (TypedefDecl *TDD = dyn_cast<TypedefDecl>(ND)) |
| DeclT = TDD->getUnderlyingType(); |
| else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND)) |
| DeclT = FD->getType(); |
| else |
| assert(0 && "RewriteBlockPointerDecl(): Decl type not yet handled"); |
| |
| const char *startBuf = SM->getCharacterData(DeclLoc); |
| const char *endBuf = startBuf; |
| // scan backward (from the decl location) for the end of the previous decl. |
| while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart) |
| startBuf--; |
| |
| // *startBuf != '^' if we are dealing with a pointer to function that |
| // may take block argument types (which will be handled below). |
| if (*startBuf == '^') { |
| // Replace the '^' with '*', computing a negative offset. |
| DeclLoc = DeclLoc.getFileLocWithOffset(startBuf-endBuf); |
| ReplaceText(DeclLoc, 1, "*", 1); |
| } |
| if (PointerTypeTakesAnyBlockArguments(DeclT)) { |
| // Replace the '^' with '*' for arguments. |
| DeclLoc = ND->getLocation(); |
| startBuf = SM->getCharacterData(DeclLoc); |
| const char *argListBegin, *argListEnd; |
| GetExtentOfArgList(startBuf, argListBegin, argListEnd); |
| while (argListBegin < argListEnd) { |
| if (*argListBegin == '^') { |
| SourceLocation CaretLoc = DeclLoc.getFileLocWithOffset(argListBegin-startBuf); |
| ReplaceText(CaretLoc, 1, "*", 1); |
| } |
| argListBegin++; |
| } |
| } |
| return; |
| } |
| |
| void RewriteBlocks::CollectBlockDeclRefInfo(BlockExpr *Exp) { |
| // Add initializers for any closure decl refs. |
| GetBlockDeclRefExprs(Exp->getBody()); |
| if (BlockDeclRefs.size()) { |
| // Unique all "by copy" declarations. |
| for (unsigned i = 0; i < BlockDeclRefs.size(); i++) |
| if (!BlockDeclRefs[i]->isByRef()) |
| BlockByCopyDecls.insert(BlockDeclRefs[i]->getDecl()); |
| // Unique all "by ref" declarations. |
| for (unsigned i = 0; i < BlockDeclRefs.size(); i++) |
| if (BlockDeclRefs[i]->isByRef()) { |
| BlockByRefDecls.insert(BlockDeclRefs[i]->getDecl()); |
| } |
| // Find any imported blocks...they will need special attention. |
| for (unsigned i = 0; i < BlockDeclRefs.size(); i++) |
| if (isBlockPointerType(BlockDeclRefs[i]->getType())) { |
| GetBlockCallExprs(Blocks[i]); |
| ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl()); |
| } |
| } |
| } |
| |
| std::string RewriteBlocks::SynthesizeBlockInitExpr(BlockExpr *Exp, VarDecl *VD) { |
| Blocks.push_back(Exp); |
| |
| CollectBlockDeclRefInfo(Exp); |
| std::string FuncName; |
| |
| if (CurFunctionDef) |
| FuncName = std::string(CurFunctionDef->getNameAsString()); |
| else if (CurMethodDef) { |
| FuncName = CurMethodDef->getSelector().getAsString(); |
| // Convert colons to underscores. |
| std::string::size_type loc = 0; |
| while ((loc = FuncName.find(":", loc)) != std::string::npos) |
| FuncName.replace(loc, 1, "_"); |
| } else if (VD) |
| FuncName = std::string(VD->getNameAsString()); |
| |
| std::string BlockNumber = utostr(Blocks.size()-1); |
| |
| std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber; |
| std::string Func = "__" + FuncName + "_block_func_" + BlockNumber; |
| |
| std::string FunkTypeStr; |
| |
| // Get a pointer to the function type so we can cast appropriately. |
| Context->getPointerType(QualType(Exp->getFunctionType(),0)) |
| .getAsStringInternal(FunkTypeStr, Context->PrintingPolicy); |
| |
| // Rewrite the closure block with a compound literal. The first cast is |
| // to prevent warnings from the C compiler. |
| std::string Init = "(" + FunkTypeStr; |
| |
| Init += ")&" + Tag; |
| |
| // Initialize the block function. |
| Init += "((void*)" + Func; |
| |
| if (ImportedBlockDecls.size()) { |
| std::string Buf = "__" + FuncName + "_block_copy_" + BlockNumber; |
| Init += ",(void*)" + Buf; |
| Buf = "__" + FuncName + "_block_dispose_" + BlockNumber; |
| Init += ",(void*)" + Buf; |
| } |
| // Add initializers for any closure decl refs. |
| if (BlockDeclRefs.size()) { |
| // Output all "by copy" declarations. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(), |
| E = BlockByCopyDecls.end(); I != E; ++I) { |
| Init += ","; |
| if (isObjCType((*I)->getType())) { |
| Init += "[["; |
| Init += (*I)->getNameAsString(); |
| Init += " retain] autorelease]"; |
| } else if (isBlockPointerType((*I)->getType())) { |
| Init += "(void *)"; |
| Init += (*I)->getNameAsString(); |
| } else { |
| Init += (*I)->getNameAsString(); |
| } |
| } |
| // Output all "by ref" declarations. |
| for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(), |
| E = BlockByRefDecls.end(); I != E; ++I) { |
| Init += ",&"; |
| Init += (*I)->getNameAsString(); |
| } |
| } |
| Init += ")"; |
| BlockDeclRefs.clear(); |
| BlockByRefDecls.clear(); |
| BlockByCopyDecls.clear(); |
| ImportedBlockDecls.clear(); |
| |
| return Init; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Function Body / Expression rewriting |
| //===----------------------------------------------------------------------===// |
| |
| Stmt *RewriteBlocks::RewriteFunctionBody(Stmt *S) { |
| // Start by rewriting all children. |
| for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end(); |
| CI != E; ++CI) |
| if (*CI) { |
| if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) { |
| RewriteFunctionBody(CBE->getBody()); |
| |
| // We've just rewritten the block body in place. |
| // Now we snarf the rewritten text and stash it away for later use. |
| std::string S = Rewrite.getRewritenText(CBE->getSourceRange()); |
| RewrittenBlockExprs[CBE] = S; |
| std::string Init = SynthesizeBlockInitExpr(CBE); |
| // Do the rewrite, using S.size() which contains the rewritten size. |
| ReplaceText(CBE->getLocStart(), S.size(), Init.c_str(), Init.size()); |
| } else { |
| RewriteFunctionBody(*CI); |
| } |
| } |
| // Handle specific things. |
| if (CallExpr *CE = dyn_cast<CallExpr>(S)) { |
| if (CE->getCallee()->getType()->isBlockPointerType()) |
| RewriteBlockCall(CE); |
| } |
| if (CastExpr *CE = dyn_cast<CastExpr>(S)) { |
| RewriteCastExpr(CE); |
| } |
| if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) { |
| for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end(); |
| DI != DE; ++DI) { |
| |
| Decl *SD = *DI; |
| if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) { |
| if (isBlockPointerType(ND->getType())) |
| RewriteBlockPointerDecl(ND); |
| else if (ND->getType()->isFunctionPointerType()) |
| CheckFunctionPointerDecl(ND->getType(), ND); |
| } |
| if (TypedefDecl *TD = dyn_cast<TypedefDecl>(SD)) { |
| if (isBlockPointerType(TD->getUnderlyingType())) |
| RewriteBlockPointerDecl(TD); |
| else if (TD->getUnderlyingType()->isFunctionPointerType()) |
| CheckFunctionPointerDecl(TD->getUnderlyingType(), TD); |
| } |
| } |
| } |
| // Handle specific things. |
| if (BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(S)) { |
| if (BDRE->isByRef()) |
| RewriteBlockDeclRefExpr(BDRE); |
| } |
| // Return this stmt unmodified. |
| return S; |
| } |
| |
| void RewriteBlocks::RewriteFunctionProtoType(QualType funcType, NamedDecl *D) { |
| if (FunctionProtoType *fproto = dyn_cast<FunctionProtoType>(funcType)) { |
| for (FunctionProtoType::arg_type_iterator I = fproto->arg_type_begin(), |
| E = fproto->arg_type_end(); I && (I != E); ++I) |
| if (isBlockPointerType(*I)) { |
| // All the args are checked/rewritten. Don't call twice! |
| RewriteBlockPointerDecl(D); |
| break; |
| } |
| } |
| } |
| |
| void RewriteBlocks::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) { |
| const PointerType *PT = funcType->getAs<PointerType>(); |
| if (PT && PointerTypeTakesAnyBlockArguments(funcType)) |
| RewriteFunctionProtoType(PT->getPointeeType(), ND); |
| } |
| |
| /// HandleDeclInMainFile - This is called for each top-level decl defined in the |
| /// main file of the input. |
| void RewriteBlocks::HandleDeclInMainFile(Decl *D) { |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| // Since function prototypes don't have ParmDecl's, we check the function |
| // prototype. This enables us to rewrite function declarations and |
| // definitions using the same code. |
| RewriteFunctionProtoType(FD->getType(), FD); |
| |
| // FIXME: Handle CXXTryStmt |
| if (CompoundStmt *Body = FD->getCompoundBody()) { |
| CurFunctionDef = FD; |
| FD->setBody(cast_or_null<CompoundStmt>(RewriteFunctionBody(Body))); |
| // This synthesizes and inserts the block "impl" struct, invoke function, |
| // and any copy/dispose helper functions. |
| InsertBlockLiteralsWithinFunction(FD); |
| CurFunctionDef = 0; |
| } |
| return; |
| } |
| if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { |
| RewriteMethodDecl(MD); |
| if (Stmt *Body = MD->getBody()) { |
| CurMethodDef = MD; |
| RewriteFunctionBody(Body); |
| InsertBlockLiteralsWithinMethod(MD); |
| CurMethodDef = 0; |
| } |
| } |
| if (VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| if (isBlockPointerType(VD->getType())) { |
| RewriteBlockPointerDecl(VD); |
| if (VD->getInit()) { |
| if (BlockExpr *CBE = dyn_cast<BlockExpr>(VD->getInit())) { |
| RewriteFunctionBody(CBE->getBody()); |
| |
| // We've just rewritten the block body in place. |
| // Now we snarf the rewritten text and stash it away for later use. |
| std::string S = Rewrite.getRewritenText(CBE->getSourceRange()); |
| RewrittenBlockExprs[CBE] = S; |
| std::string Init = SynthesizeBlockInitExpr(CBE, VD); |
| // Do the rewrite, using S.size() which contains the rewritten size. |
| ReplaceText(CBE->getLocStart(), S.size(), Init.c_str(), Init.size()); |
| SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), |
| VD->getNameAsCString()); |
| } else if (CastExpr *CE = dyn_cast<CastExpr>(VD->getInit())) { |
| RewriteCastExpr(CE); |
| } |
| } |
| } else if (VD->getType()->isFunctionPointerType()) { |
| CheckFunctionPointerDecl(VD->getType(), VD); |
| if (VD->getInit()) { |
| if (CastExpr *CE = dyn_cast<CastExpr>(VD->getInit())) { |
| RewriteCastExpr(CE); |
| } |
| } |
| } |
| return; |
| } |
| if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) { |
| if (isBlockPointerType(TD->getUnderlyingType())) |
| RewriteBlockPointerDecl(TD); |
| else if (TD->getUnderlyingType()->isFunctionPointerType()) |
| CheckFunctionPointerDecl(TD->getUnderlyingType(), TD); |
| return; |
| } |
| if (RecordDecl *RD = dyn_cast<RecordDecl>(D)) { |
| if (RD->isDefinition()) { |
| for (RecordDecl::field_iterator i = RD->field_begin(), |
| e = RD->field_end(); i != e; ++i) { |
| FieldDecl *FD = *i; |
| if (isBlockPointerType(FD->getType())) |
| RewriteBlockPointerDecl(FD); |
| } |
| } |
| return; |
| } |
| } |