objc rewriter: start supporting modern objective-c abi
in objective-c rewriter. wip.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149989 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Rewrite/ASTConsumers.h b/include/clang/Rewrite/ASTConsumers.h
index 7a636e5..c9c92e3 100644
--- a/include/clang/Rewrite/ASTConsumers.h
+++ b/include/clang/Rewrite/ASTConsumers.h
@@ -31,6 +31,11 @@
DiagnosticsEngine &Diags,
const LangOptions &LOpts,
bool SilenceRewriteMacroWarning);
+ASTConsumer *CreateModernObjCRewriter(const std::string &InFile,
+ raw_ostream *OS,
+ DiagnosticsEngine &Diags,
+ const LangOptions &LOpts,
+ bool SilenceRewriteMacroWarning);
/// CreateHTMLPrinter - Create an AST consumer which rewrites source code to
/// HTML with syntax highlighting suitable for viewing in a web-browser.
diff --git a/lib/Rewrite/CMakeLists.txt b/lib/Rewrite/CMakeLists.txt
index ee4cba2..2a05040 100644
--- a/lib/Rewrite/CMakeLists.txt
+++ b/lib/Rewrite/CMakeLists.txt
@@ -7,6 +7,7 @@
HTMLPrint.cpp
HTMLRewrite.cpp
RewriteMacros.cpp
+ RewriteModernObjC.cpp
RewriteObjC.cpp
RewriteRope.cpp
RewriteTest.cpp
diff --git a/lib/Rewrite/FrontendActions.cpp b/lib/Rewrite/FrontendActions.cpp
index 6e84566..1753325 100644
--- a/lib/Rewrite/FrontendActions.cpp
+++ b/lib/Rewrite/FrontendActions.cpp
@@ -154,10 +154,15 @@
ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
- if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp"))
+ if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp")) {
+ if (CI.getLangOpts().ObjCNonFragileABI)
+ return CreateModernObjCRewriter(InFile, OS,
+ CI.getDiagnostics(), CI.getLangOpts(),
+ CI.getDiagnosticOpts().NoRewriteMacros);
return CreateObjCRewriter(InFile, OS,
CI.getDiagnostics(), CI.getLangOpts(),
CI.getDiagnosticOpts().NoRewriteMacros);
+ }
return 0;
}
diff --git a/lib/Rewrite/RewriteModernObjC.cpp b/lib/Rewrite/RewriteModernObjC.cpp
new file mode 100644
index 0000000..2e84db7
--- /dev/null
+++ b/lib/Rewrite/RewriteModernObjC.cpp
@@ -0,0 +1,6102 @@
+//===--- RewriteObjC.cpp - Playground for the code rewriter ---------------===//
+//
+// 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 code rewriter.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/ASTConsumers.h"
+#include "clang/Rewrite/Rewriter.h"
+#include "clang/AST/AST.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/AST/ParentMap.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Lex/Lexer.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/DenseSet.h"
+
+using namespace clang;
+using llvm::utostr;
+
+namespace {
+ class RewriteModernObjC : public ASTConsumer {
+ protected:
+
+ enum {
+ BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
+ block, ... */
+ BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
+ BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
+ __block variable */
+ BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
+ helpers */
+ BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
+ support routines */
+ BLOCK_BYREF_CURRENT_MAX = 256
+ };
+
+ enum {
+ BLOCK_NEEDS_FREE = (1 << 24),
+ BLOCK_HAS_COPY_DISPOSE = (1 << 25),
+ BLOCK_HAS_CXX_OBJ = (1 << 26),
+ BLOCK_IS_GC = (1 << 27),
+ BLOCK_IS_GLOBAL = (1 << 28),
+ BLOCK_HAS_DESCRIPTOR = (1 << 29)
+ };
+ static const int OBJC_ABI_VERSION = 7;
+
+ Rewriter Rewrite;
+ DiagnosticsEngine &Diags;
+ const LangOptions &LangOpts;
+ ASTContext *Context;
+ SourceManager *SM;
+ TranslationUnitDecl *TUDecl;
+ FileID MainFileID;
+ const char *MainFileStart, *MainFileEnd;
+ Stmt *CurrentBody;
+ ParentMap *PropParentMap; // created lazily.
+ std::string InFileName;
+ raw_ostream* OutFile;
+ std::string Preamble;
+
+ TypeDecl *ProtocolTypeDecl;
+ VarDecl *GlobalVarDecl;
+ unsigned RewriteFailedDiag;
+ // ObjC string constant support.
+ unsigned NumObjCStringLiterals;
+ VarDecl *ConstantStringClassReference;
+ RecordDecl *NSStringRecord;
+
+ // ObjC foreach break/continue generation support.
+ int BcLabelCount;
+
+ unsigned TryFinallyContainsReturnDiag;
+ // Needed for super.
+ ObjCMethodDecl *CurMethodDef;
+ RecordDecl *SuperStructDecl;
+ RecordDecl *ConstantStringDecl;
+
+ FunctionDecl *MsgSendFunctionDecl;
+ FunctionDecl *MsgSendSuperFunctionDecl;
+ FunctionDecl *MsgSendStretFunctionDecl;
+ FunctionDecl *MsgSendSuperStretFunctionDecl;
+ FunctionDecl *MsgSendFpretFunctionDecl;
+ FunctionDecl *GetClassFunctionDecl;
+ FunctionDecl *GetMetaClassFunctionDecl;
+ FunctionDecl *GetSuperClassFunctionDecl;
+ FunctionDecl *SelGetUidFunctionDecl;
+ FunctionDecl *CFStringFunctionDecl;
+ FunctionDecl *SuperContructorFunctionDecl;
+ FunctionDecl *CurFunctionDef;
+ FunctionDecl *CurFunctionDeclToDeclareForBlock;
+
+ /* Misc. containers needed for meta-data rewrite. */
+ SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
+ SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
+ llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
+ llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
+ llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCForwardDecls;
+ llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
+ SmallVector<Stmt *, 32> Stmts;
+ SmallVector<int, 8> ObjCBcLabelNo;
+ // Remember all the @protocol(<expr>) expressions.
+ llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
+
+ llvm::DenseSet<uint64_t> CopyDestroyCache;
+
+ // Block expressions.
+ SmallVector<BlockExpr *, 32> Blocks;
+ SmallVector<int, 32> InnerDeclRefsCount;
+ SmallVector<BlockDeclRefExpr *, 32> InnerDeclRefs;
+
+ SmallVector<BlockDeclRefExpr *, 32> BlockDeclRefs;
+
+ // Block related declarations.
+ SmallVector<ValueDecl *, 8> BlockByCopyDecls;
+ llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
+ SmallVector<ValueDecl *, 8> BlockByRefDecls;
+ llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
+ llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
+ llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
+ llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
+
+ llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
+
+ // This maps an original source AST to it's rewritten form. This allows
+ // us to avoid rewriting the same node twice (which is very uncommon).
+ // This is needed to support some of the exotic property rewriting.
+ llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
+
+ // Needed for header files being rewritten
+ bool IsHeader;
+ bool SilenceRewriteMacroWarning;
+ bool objc_impl_method;
+
+ bool DisableReplaceStmt;
+ class DisableReplaceStmtScope {
+ RewriteModernObjC &R;
+ bool SavedValue;
+
+ public:
+ DisableReplaceStmtScope(RewriteModernObjC &R)
+ : R(R), SavedValue(R.DisableReplaceStmt) {
+ R.DisableReplaceStmt = true;
+ }
+ ~DisableReplaceStmtScope() {
+ R.DisableReplaceStmt = SavedValue;
+ }
+ };
+ void InitializeCommon(ASTContext &context);
+
+ public:
+
+ // Top Level Driver code.
+ virtual bool HandleTopLevelDecl(DeclGroupRef D) {
+ for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
+ if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
+ if (!Class->isThisDeclarationADefinition()) {
+ RewriteForwardClassDecl(D);
+ break;
+ }
+ }
+
+ if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
+ if (!Proto->isThisDeclarationADefinition()) {
+ RewriteForwardProtocolDecl(D);
+ break;
+ }
+ }
+
+ HandleTopLevelSingleDecl(*I);
+ }
+ return true;
+ }
+ void HandleTopLevelSingleDecl(Decl *D);
+ void HandleDeclInMainFile(Decl *D);
+ RewriteModernObjC(std::string inFile, raw_ostream *OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn);
+
+ ~RewriteModernObjC() {}
+
+ virtual void HandleTranslationUnit(ASTContext &C);
+
+ void ReplaceStmt(Stmt *Old, Stmt *New) {
+ Stmt *ReplacingStmt = ReplacedNodes[Old];
+
+ if (ReplacingStmt)
+ return; // We can't rewrite the same node twice.
+
+ if (DisableReplaceStmt)
+ return;
+
+ // If replacement succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceStmt(Old, New)) {
+ ReplacedNodes[Old] = New;
+ return;
+ }
+ if (SilenceRewriteMacroWarning)
+ return;
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ }
+
+ void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
+ if (DisableReplaceStmt)
+ return;
+
+ // Measure the old text.
+ int Size = Rewrite.getRangeSize(SrcRange);
+ if (Size == -1) {
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ return;
+ }
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream S(SStr);
+ New->printPretty(S, *Context, 0, PrintingPolicy(LangOpts));
+ const std::string &Str = S.str();
+
+ // If replacement succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
+ ReplacedNodes[Old] = New;
+ return;
+ }
+ if (SilenceRewriteMacroWarning)
+ return;
+ Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
+ << Old->getSourceRange();
+ }
+
+ void InsertText(SourceLocation Loc, StringRef Str,
+ bool InsertAfter = true) {
+ // If insertion succeeded or warning disabled return with no warning.
+ if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
+ SilenceRewriteMacroWarning)
+ return;
+
+ Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
+ }
+
+ void ReplaceText(SourceLocation Start, unsigned OrigLength,
+ StringRef Str) {
+ // If removal succeeded or warning disabled return with no warning.
+ if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
+ SilenceRewriteMacroWarning)
+ return;
+
+ Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
+ }
+
+ // Syntactic Rewriting.
+ void RewriteRecordBody(RecordDecl *RD);
+ void RewriteInclude();
+ void RewriteForwardClassDecl(DeclGroupRef D);
+ void RewriteForwardClassDecl(const llvm::SmallVector<Decl*, 8> &DG);
+ void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
+ const std::string &typedefString);
+ void RewriteImplementations();
+ void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
+ ObjCImplementationDecl *IMD,
+ ObjCCategoryImplDecl *CID);
+ void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
+ void RewriteImplementationDecl(Decl *Dcl);
+ void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
+ ObjCMethodDecl *MDecl, std::string &ResultStr);
+ void RewriteTypeIntoString(QualType T, std::string &ResultStr,
+ const FunctionType *&FPRetType);
+ void RewriteByRefString(std::string &ResultStr, const std::string &Name,
+ ValueDecl *VD, bool def=false);
+ void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
+ void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
+ void RewriteForwardProtocolDecl(DeclGroupRef D);
+ void RewriteForwardProtocolDecl(const llvm::SmallVector<Decl*, 8> &DG);
+ void RewriteMethodDeclaration(ObjCMethodDecl *Method);
+ void RewriteProperty(ObjCPropertyDecl *prop);
+ void RewriteFunctionDecl(FunctionDecl *FD);
+ void RewriteBlockPointerType(std::string& Str, QualType Type);
+ void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
+ void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
+ void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
+ void RewriteTypeOfDecl(VarDecl *VD);
+ void RewriteObjCQualifiedInterfaceTypes(Expr *E);
+
+ // Expression Rewriting.
+ Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
+ Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
+ Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
+ Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
+ Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
+ Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
+ Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
+ Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
+ void RewriteTryReturnStmts(Stmt *S);
+ void RewriteSyncReturnStmts(Stmt *S, std::string buf);
+ Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
+ Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
+ Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
+ Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
+ SourceLocation OrigEnd);
+ Stmt *RewriteBreakStmt(BreakStmt *S);
+ Stmt *RewriteContinueStmt(ContinueStmt *S);
+ void RewriteCastExpr(CStyleCastExpr *CE);
+
+ // Block rewriting.
+ void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
+
+ // Block specific rewrite rules.
+ void RewriteBlockPointerDecl(NamedDecl *VD);
+ void RewriteByRefVar(VarDecl *VD);
+ Stmt *RewriteBlockDeclRefExpr(Expr *VD);
+ Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
+ void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
+
+ void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
+ std::string &Result);
+
+ virtual void Initialize(ASTContext &context);
+
+ // Misc. AST transformation routines. Somtimes they end up calling
+ // rewriting routines on the new ASTs.
+ CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
+ Expr **args, unsigned nargs,
+ SourceLocation StartLoc=SourceLocation(),
+ SourceLocation EndLoc=SourceLocation());
+
+ Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
+ SourceLocation StartLoc=SourceLocation(),
+ SourceLocation EndLoc=SourceLocation());
+
+ void SynthCountByEnumWithState(std::string &buf);
+ void SynthMsgSendFunctionDecl();
+ void SynthMsgSendSuperFunctionDecl();
+ void SynthMsgSendStretFunctionDecl();
+ void SynthMsgSendFpretFunctionDecl();
+ void SynthMsgSendSuperStretFunctionDecl();
+ void SynthGetClassFunctionDecl();
+ void SynthGetMetaClassFunctionDecl();
+ void SynthGetSuperClassFunctionDecl();
+ void SynthSelGetUidFunctionDecl();
+ void SynthSuperContructorFunctionDecl();
+
+ // Rewriting metadata
+ template<typename MethodIterator>
+ void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
+ MethodIterator MethodEnd,
+ bool IsInstanceMethod,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result);
+ virtual void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result);
+ virtual void RewriteObjCProtocolListMetaData(
+ const ObjCList<ObjCProtocolDecl> &Prots,
+ StringRef prefix, StringRef ClassName, std::string &Result);
+ virtual void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result);
+ virtual void RewriteMetaDataIntoBuffer(std::string &Result);
+ virtual void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
+ std::string &Result);
+
+ // Rewriting ivar
+ virtual void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result);
+ virtual Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
+
+
+ std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
+ std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
+ StringRef funcName, std::string Tag);
+ std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
+ StringRef funcName, std::string Tag);
+ std::string SynthesizeBlockImpl(BlockExpr *CE,
+ std::string Tag, std::string Desc);
+ std::string SynthesizeBlockDescriptor(std::string DescTag,
+ std::string ImplTag,
+ int i, StringRef funcName,
+ unsigned hasCopy);
+ Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
+ void SynthesizeBlockLiterals(SourceLocation FunLocStart,
+ StringRef FunName);
+ FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
+ Stmt *SynthBlockInitExpr(BlockExpr *Exp,
+ const SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs);
+
+ // Misc. helper routines.
+ QualType getProtocolType();
+ void WarnAboutReturnGotoStmts(Stmt *S);
+ void HasReturnStmts(Stmt *S, bool &hasReturns);
+ void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
+ void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
+ void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
+
+ bool IsDeclStmtInForeachHeader(DeclStmt *DS);
+ void CollectBlockDeclRefInfo(BlockExpr *Exp);
+ void GetBlockDeclRefExprs(Stmt *S);
+ void GetInnerBlockDeclRefExprs(Stmt *S,
+ SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs,
+ llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
+
+ // 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 isTopLevelBlockPointerType(QualType T) {
+ return isa<BlockPointerType>(T);
+ }
+
+ /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
+ /// to a function pointer type and upon success, returns true; false
+ /// otherwise.
+ bool convertBlockPointerToFunctionPointer(QualType &T) {
+ if (isTopLevelBlockPointerType(T)) {
+ const BlockPointerType *BPT = T->getAs<BlockPointerType>();
+ T = Context->getPointerType(BPT->getPointeeType());
+ return true;
+ }
+ return false;
+ }
+
+ bool needToScanForQualifiers(QualType T);
+ QualType getSuperStructType();
+ QualType getConstantStringStructType();
+ QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
+ bool BufferContainsPPDirectives(const char *startBuf, const char *endBuf);
+
+ void convertToUnqualifiedObjCType(QualType &T) {
+ if (T->isObjCQualifiedIdType())
+ T = Context->getObjCIdType();
+ else if (T->isObjCQualifiedClassType())
+ T = Context->getObjCClassType();
+ else if (T->isObjCObjectPointerType() &&
+ T->getPointeeType()->isObjCQualifiedInterfaceType()) {
+ if (const ObjCObjectPointerType * OBJPT =
+ T->getAsObjCInterfacePointerType()) {
+ const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
+ T = QualType(IFaceT, 0);
+ T = Context->getPointerType(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;
+ }
+ bool PointerTypeTakesAnyBlockArguments(QualType QT);
+ bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
+ void GetExtentOfArgList(const char *Name, const char *&LParen,
+ const char *&RParen);
+
+ void QuoteDoublequotes(std::string &From, std::string &To) {
+ for (unsigned i = 0; i < From.length(); i++) {
+ if (From[i] == '"')
+ To += "\\\"";
+ else
+ To += From[i];
+ }
+ }
+
+ QualType getSimpleFunctionType(QualType result,
+ const QualType *args,
+ unsigned numArgs,
+ bool variadic = false) {
+ if (result == Context->getObjCInstanceType())
+ result = Context->getObjCIdType();
+ FunctionProtoType::ExtProtoInfo fpi;
+ fpi.Variadic = variadic;
+ return Context->getFunctionType(result, args, numArgs, fpi);
+ }
+
+ // Helper function: create a CStyleCastExpr with trivial type source info.
+ CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
+ CastKind Kind, Expr *E) {
+ TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
+ return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, 0, TInfo,
+ SourceLocation(), SourceLocation());
+ }
+ };
+
+}
+
+void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
+ NamedDecl *D) {
+ if (const FunctionProtoType *fproto
+ = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
+ for (FunctionProtoType::arg_type_iterator I = fproto->arg_type_begin(),
+ E = fproto->arg_type_end(); I && (I != E); ++I)
+ if (isTopLevelBlockPointerType(*I)) {
+ // All the args are checked/rewritten. Don't call twice!
+ RewriteBlockPointerDecl(D);
+ break;
+ }
+ }
+}
+
+void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
+ const PointerType *PT = funcType->getAs<PointerType>();
+ if (PT && PointerTypeTakesAnyBlockArguments(funcType))
+ RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
+}
+
+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";
+}
+
+RewriteModernObjC::RewriteModernObjC(std::string inFile, raw_ostream* OS,
+ DiagnosticsEngine &D, const LangOptions &LOpts,
+ bool silenceMacroWarn)
+ : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(OS),
+ SilenceRewriteMacroWarning(silenceMacroWarn) {
+ IsHeader = IsHeaderFile(inFile);
+ RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
+ "rewriting sub-expression within a macro (may not be correct)");
+ TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
+ DiagnosticsEngine::Warning,
+ "rewriter doesn't support user-specified control flow semantics "
+ "for @try/@finally (code may not execute properly)");
+}
+
+ASTConsumer *clang::CreateModernObjCRewriter(const std::string& InFile,
+ raw_ostream* OS,
+ DiagnosticsEngine &Diags,
+ const LangOptions &LOpts,
+ bool SilenceRewriteMacroWarning) {
+ return new RewriteModernObjC(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
+}
+
+void RewriteModernObjC::InitializeCommon(ASTContext &context) {
+ Context = &context;
+ SM = &Context->getSourceManager();
+ TUDecl = Context->getTranslationUnitDecl();
+ MsgSendFunctionDecl = 0;
+ MsgSendSuperFunctionDecl = 0;
+ MsgSendStretFunctionDecl = 0;
+ MsgSendSuperStretFunctionDecl = 0;
+ MsgSendFpretFunctionDecl = 0;
+ GetClassFunctionDecl = 0;
+ GetMetaClassFunctionDecl = 0;
+ GetSuperClassFunctionDecl = 0;
+ SelGetUidFunctionDecl = 0;
+ CFStringFunctionDecl = 0;
+ ConstantStringClassReference = 0;
+ NSStringRecord = 0;
+ CurMethodDef = 0;
+ CurFunctionDef = 0;
+ CurFunctionDeclToDeclareForBlock = 0;
+ GlobalVarDecl = 0;
+ SuperStructDecl = 0;
+ ProtocolTypeDecl = 0;
+ ConstantStringDecl = 0;
+ BcLabelCount = 0;
+ SuperContructorFunctionDecl = 0;
+ NumObjCStringLiterals = 0;
+ PropParentMap = 0;
+ CurrentBody = 0;
+ DisableReplaceStmt = false;
+ objc_impl_method = false;
+
+ // 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(), Context->getLangOptions());
+}
+
+//===----------------------------------------------------------------------===//
+// Top Level Driver Code
+//===----------------------------------------------------------------------===//
+
+void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ // 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->getExpansionLoc(Loc);
+
+ // If this is for a builtin, ignore it.
+ if (Loc.isInvalid()) return;
+
+ // Look for built-in declarations that we need to refer during the rewrite.
+ if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
+ RewriteFunctionDecl(FD);
+ } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
+ // declared in <Foundation/NSString.h>
+ if (FVD->getName() == "_NSConstantStringClassReference") {
+ ConstantStringClassReference = FVD;
+ return;
+ }
+ } else if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D)) {
+ if (ID->isThisDeclarationADefinition())
+ RewriteInterfaceDecl(ID);
+ } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
+ RewriteCategoryDecl(CD);
+ } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
+ if (PD->isThisDeclarationADefinition())
+ RewriteProtocolDecl(PD);
+ } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
+ // Recurse into linkage specifications
+ for (DeclContext::decl_iterator DI = LSD->decls_begin(),
+ DIEnd = LSD->decls_end();
+ DI != DIEnd; ) {
+ if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
+ if (!IFace->isThisDeclarationADefinition()) {
+ SmallVector<Decl *, 8> DG;
+ SourceLocation StartLoc = IFace->getLocStart();
+ do {
+ if (isa<ObjCInterfaceDecl>(*DI) &&
+ !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
+ StartLoc == (*DI)->getLocStart())
+ DG.push_back(*DI);
+ else
+ break;
+
+ ++DI;
+ } while (DI != DIEnd);
+ RewriteForwardClassDecl(DG);
+ continue;
+ }
+ }
+
+ if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
+ if (!Proto->isThisDeclarationADefinition()) {
+ SmallVector<Decl *, 8> DG;
+ SourceLocation StartLoc = Proto->getLocStart();
+ do {
+ if (isa<ObjCProtocolDecl>(*DI) &&
+ !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
+ StartLoc == (*DI)->getLocStart())
+ DG.push_back(*DI);
+ else
+ break;
+
+ ++DI;
+ } while (DI != DIEnd);
+ RewriteForwardProtocolDecl(DG);
+ continue;
+ }
+ }
+
+ HandleTopLevelSingleDecl(*DI);
+ ++DI;
+ }
+ }
+ // If we have a decl in the main file, see if we should rewrite it.
+ if (SM->isFromMainFile(Loc))
+ return HandleDeclInMainFile(D);
+}
+
+//===----------------------------------------------------------------------===//
+// Syntactic (non-AST) Rewriting Code
+//===----------------------------------------------------------------------===//
+
+void RewriteModernObjC::RewriteInclude() {
+ SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
+ StringRef MainBuf = SM->getBufferData(MainFileID);
+ const char *MainBufStart = MainBuf.begin();
+ const char *MainBufEnd = MainBuf.end();
+ size_t ImportLen = strlen("import");
+
+ // Loop over the whole file, looking for includes.
+ for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
+ if (*BufPtr == '#') {
+ if (++BufPtr == MainBufEnd)
+ return;
+ while (*BufPtr == ' ' || *BufPtr == '\t')
+ if (++BufPtr == MainBufEnd)
+ return;
+ if (!strncmp(BufPtr, "import", ImportLen)) {
+ // replace import with include
+ SourceLocation ImportLoc =
+ LocStart.getLocWithOffset(BufPtr-MainBufStart);
+ ReplaceText(ImportLoc, ImportLen, "include");
+ BufPtr += ImportLen;
+ }
+ }
+ }
+}
+
+static std::string getIvarAccessString(ObjCIvarDecl *OID) {
+ const ObjCInterfaceDecl *ClassDecl = OID->getContainingInterface();
+ std::string S;
+ S = "((struct ";
+ S += ClassDecl->getIdentifier()->getName();
+ S += "_IMPL *)self)->";
+ S += OID->getName();
+ return S;
+}
+
+void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
+ ObjCImplementationDecl *IMD,
+ ObjCCategoryImplDecl *CID) {
+ static bool objcGetPropertyDefined = false;
+ static bool objcSetPropertyDefined = false;
+ SourceLocation startLoc = PID->getLocStart();
+ InsertText(startLoc, "// ");
+ const char *startBuf = SM->getCharacterData(startLoc);
+ assert((*startBuf == '@') && "bogus @synthesize location");
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "@synthesize: can't find ';'");
+ SourceLocation onePastSemiLoc =
+ startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ return; // FIXME: is this correct?
+
+ // Generate the 'getter' function.
+ ObjCPropertyDecl *PD = PID->getPropertyDecl();
+ ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
+
+ if (!OID)
+ return;
+ unsigned Attributes = PD->getPropertyAttributes();
+ if (!PD->getGetterMethodDecl()->isDefined()) {
+ bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
+ (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
+ ObjCPropertyDecl::OBJC_PR_copy));
+ std::string Getr;
+ if (GenGetProperty && !objcGetPropertyDefined) {
+ objcGetPropertyDefined = true;
+ // FIXME. Is this attribute correct in all cases?
+ Getr = "\nextern \"C\" __declspec(dllimport) "
+ "id objc_getProperty(id, SEL, long, bool);\n";
+ }
+ RewriteObjCMethodDecl(OID->getContainingInterface(),
+ PD->getGetterMethodDecl(), Getr);
+ Getr += "{ ";
+ // Synthesize an explicit cast to gain access to the ivar.
+ // See objc-act.c:objc_synthesize_new_getter() for details.
+ if (GenGetProperty) {
+ // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
+ Getr += "typedef ";
+ const FunctionType *FPRetType = 0;
+ RewriteTypeIntoString(PD->getGetterMethodDecl()->getResultType(), Getr,
+ FPRetType);
+ Getr += " _TYPE";
+ if (FPRetType) {
+ Getr += ")"; // close the precedence "scope" for "*".
+
+ // Now, emit the argument types (if any).
+ if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
+ Getr += "(";
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
+ if (i) Getr += ", ";
+ std::string ParamStr = FT->getArgType(i).getAsString(
+ Context->getPrintingPolicy());
+ Getr += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (FT->getNumArgs()) Getr += ", ";
+ Getr += "...";
+ }
+ Getr += ")";
+ } else
+ Getr += "()";
+ }
+ Getr += ";\n";
+ Getr += "return (_TYPE)";
+ Getr += "objc_getProperty(self, _cmd, ";
+ RewriteIvarOffsetComputation(OID, Getr);
+ Getr += ", 1)";
+ }
+ else
+ Getr += "return " + getIvarAccessString(OID);
+ Getr += "; }";
+ InsertText(onePastSemiLoc, Getr);
+ }
+
+ if (PD->isReadOnly() || PD->getSetterMethodDecl()->isDefined())
+ return;
+
+ // Generate the 'setter' function.
+ std::string Setr;
+ bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
+ ObjCPropertyDecl::OBJC_PR_copy);
+ if (GenSetProperty && !objcSetPropertyDefined) {
+ objcSetPropertyDefined = true;
+ // FIXME. Is this attribute correct in all cases?
+ Setr = "\nextern \"C\" __declspec(dllimport) "
+ "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
+ }
+
+ RewriteObjCMethodDecl(OID->getContainingInterface(),
+ PD->getSetterMethodDecl(), Setr);
+ Setr += "{ ";
+ // Synthesize an explicit cast to initialize the ivar.
+ // See objc-act.c:objc_synthesize_new_setter() for details.
+ if (GenSetProperty) {
+ Setr += "objc_setProperty (self, _cmd, ";
+ RewriteIvarOffsetComputation(OID, Setr);
+ Setr += ", (id)";
+ Setr += PD->getName();
+ Setr += ", ";
+ if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
+ Setr += "0, ";
+ else
+ Setr += "1, ";
+ if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
+ Setr += "1)";
+ else
+ Setr += "0)";
+ }
+ else {
+ Setr += getIvarAccessString(OID) + " = ";
+ Setr += PD->getName();
+ }
+ Setr += "; }";
+ InsertText(onePastSemiLoc, Setr);
+}
+
+static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
+ std::string &typedefString) {
+ typedefString += "#ifndef _REWRITER_typedef_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += "\n";
+ typedefString += "#define _REWRITER_typedef_";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += "\n";
+ typedefString += "typedef struct objc_object ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n#endif\n";
+}
+
+void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
+ const std::string &typedefString) {
+ SourceLocation startLoc = ClassDecl->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+ const char *semiPtr = strchr(startBuf, ';');
+ // Replace the @class with typedefs corresponding to the classes.
+ ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
+}
+
+void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
+ std::string typedefString;
+ for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
+ ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(*I);
+ if (I == D.begin()) {
+ // Translate to typedef's that forward reference structs with the same name
+ // as the class. As a convenience, we include the original declaration
+ // as a comment.
+ typedefString += "// @class ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n";
+ }
+ RewriteOneForwardClassDecl(ForwardDecl, typedefString);
+ }
+ DeclGroupRef::iterator I = D.begin();
+ RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
+}
+
+void RewriteModernObjC::RewriteForwardClassDecl(
+ const llvm::SmallVector<Decl*, 8> &D) {
+ std::string typedefString;
+ for (unsigned i = 0; i < D.size(); i++) {
+ ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
+ if (i == 0) {
+ typedefString += "// @class ";
+ typedefString += ForwardDecl->getNameAsString();
+ typedefString += ";\n";
+ }
+ RewriteOneForwardClassDecl(ForwardDecl, typedefString);
+ }
+ RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
+}
+
+void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
+ // When method is a synthesized one, such as a getter/setter there is
+ // nothing to rewrite.
+ if (Method->isImplicit())
+ return;
+ SourceLocation LocStart = Method->getLocStart();
+ SourceLocation LocEnd = Method->getLocEnd();
+
+ if (SM->getExpansionLineNumber(LocEnd) >
+ SM->getExpansionLineNumber(LocStart)) {
+ InsertText(LocStart, "#if 0\n");
+ ReplaceText(LocEnd, 1, ";\n#endif\n");
+ } else {
+ InsertText(LocStart, "// ");
+ }
+}
+
+void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
+ SourceLocation Loc = prop->getAtLoc();
+
+ ReplaceText(Loc, 0, "// ");
+ // FIXME: handle properties that are declared across multiple lines.
+}
+
+void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
+ SourceLocation LocStart = CatDecl->getLocStart();
+
+ // FIXME: handle category headers that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+
+ for (ObjCCategoryDecl::prop_iterator I = CatDecl->prop_begin(),
+ E = CatDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+
+ for (ObjCCategoryDecl::instmeth_iterator
+ I = CatDecl->instmeth_begin(), E = CatDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCCategoryDecl::classmeth_iterator
+ I = CatDecl->classmeth_begin(), E = CatDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ // Lastly, comment out the @end.
+ ReplaceText(CatDecl->getAtEndRange().getBegin(),
+ strlen("@end"), "/* @end */");
+}
+
+void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
+ SourceLocation LocStart = PDecl->getLocStart();
+ assert(PDecl->isThisDeclarationADefinition());
+
+ // FIXME: handle protocol headers that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+
+ for (ObjCProtocolDecl::instmeth_iterator
+ I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCProtocolDecl::classmeth_iterator
+ I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ for (ObjCInterfaceDecl::prop_iterator I = PDecl->prop_begin(),
+ E = PDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+
+ // Lastly, comment out the @end.
+ SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
+ ReplaceText(LocEnd, strlen("@end"), "/* @end */");
+
+ // Must comment out @optional/@required
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ for (const char *p = startBuf; p < endBuf; p++) {
+ if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
+ SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
+ ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
+
+ }
+ else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
+ SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
+ ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
+
+ }
+ }
+}
+
+void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
+ SourceLocation LocStart = (*D.begin())->getLocStart();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid SourceLocation");
+ // FIXME: handle forward protocol that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+}
+
+void
+RewriteModernObjC::RewriteForwardProtocolDecl(const llvm::SmallVector<Decl*, 8> &DG) {
+ SourceLocation LocStart = DG[0]->getLocStart();
+ if (LocStart.isInvalid())
+ llvm_unreachable("Invalid SourceLocation");
+ // FIXME: handle forward protocol that are declared across multiple lines.
+ ReplaceText(LocStart, 0, "// ");
+}
+
+void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
+ const FunctionType *&FPRetType) {
+ if (T->isObjCQualifiedIdType())
+ ResultStr += "id";
+ else if (T->isFunctionPointerType() ||
+ T->isBlockPointerType()) {
+ // needs special handling, since pointer-to-functions have special
+ // syntax (where a decaration models use).
+ QualType retType = T;
+ QualType PointeeTy;
+ if (const PointerType* PT = retType->getAs<PointerType>())
+ PointeeTy = PT->getPointeeType();
+ else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
+ PointeeTy = BPT->getPointeeType();
+ if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
+ ResultStr += FPRetType->getResultType().getAsString(
+ Context->getPrintingPolicy());
+ ResultStr += "(*";
+ }
+ } else
+ ResultStr += T.getAsString(Context->getPrintingPolicy());
+}
+
+void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
+ ObjCMethodDecl *OMD,
+ std::string &ResultStr) {
+ //fprintf(stderr,"In RewriteObjCMethodDecl\n");
+ const FunctionType *FPRetType = 0;
+ ResultStr += "\nstatic ";
+ RewriteTypeIntoString(OMD->getResultType(), ResultStr, FPRetType);
+ ResultStr += " ";
+
+ // Unique method name
+ std::string NameStr;
+
+ if (OMD->isInstanceMethod())
+ NameStr += "_I_";
+ else
+ NameStr += "_C_";
+
+ NameStr += IDecl->getNameAsString();
+ NameStr += "_";
+
+ if (ObjCCategoryImplDecl *CID =
+ dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
+ NameStr += CID->getNameAsString();
+ NameStr += "_";
+ }
+ // Append selector names, replacing ':' with '_'
+ {
+ std::string selString = OMD->getSelector().getAsString();
+ int len = selString.size();
+ for (int i = 0; i < len; i++)
+ if (selString[i] == ':')
+ selString[i] = '_';
+ NameStr += selString;
+ }
+ // Remember this name for metadata emission
+ MethodInternalNames[OMD] = NameStr;
+ ResultStr += NameStr;
+
+ // Rewrite arguments
+ ResultStr += "(";
+
+ // invisible arguments
+ if (OMD->isInstanceMethod()) {
+ QualType selfTy = Context->getObjCInterfaceType(IDecl);
+ selfTy = Context->getPointerType(selfTy);
+ if (!LangOpts.MicrosoftExt) {
+ if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
+ ResultStr += "struct ";
+ }
+ // When rewriting for Microsoft, explicitly omit the structure name.
+ ResultStr += IDecl->getNameAsString();
+ ResultStr += " *";
+ }
+ else
+ ResultStr += Context->getObjCClassType().getAsString(
+ Context->getPrintingPolicy());
+
+ ResultStr += " self, ";
+ ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
+ ResultStr += " _cmd";
+
+ // Method arguments.
+ for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
+ E = OMD->param_end(); PI != E; ++PI) {
+ ParmVarDecl *PDecl = *PI;
+ ResultStr += ", ";
+ if (PDecl->getType()->isObjCQualifiedIdType()) {
+ ResultStr += "id ";
+ ResultStr += PDecl->getNameAsString();
+ } else {
+ std::string Name = PDecl->getNameAsString();
+ QualType QT = PDecl->getType();
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (convertBlockPointerToFunctionPointer(QT))
+ QT.getAsStringInternal(Name, Context->getPrintingPolicy());
+ else
+ PDecl->getType().getAsStringInternal(Name, Context->getPrintingPolicy());
+ ResultStr += Name;
+ }
+ }
+ if (OMD->isVariadic())
+ ResultStr += ", ...";
+ ResultStr += ") ";
+
+ if (FPRetType) {
+ ResultStr += ")"; // close the precedence "scope" for "*".
+
+ // Now, emit the argument types (if any).
+ if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
+ ResultStr += "(";
+ for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) {
+ if (i) ResultStr += ", ";
+ std::string ParamStr = FT->getArgType(i).getAsString(
+ Context->getPrintingPolicy());
+ ResultStr += ParamStr;
+ }
+ if (FT->isVariadic()) {
+ if (FT->getNumArgs()) ResultStr += ", ";
+ ResultStr += "...";
+ }
+ ResultStr += ")";
+ } else {
+ ResultStr += "()";
+ }
+ }
+}
+void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
+ ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
+ ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
+
+ InsertText(IMD ? IMD->getLocStart() : CID->getLocStart(), "// ");
+
+ for (ObjCCategoryImplDecl::instmeth_iterator
+ I = IMD ? IMD->instmeth_begin() : CID->instmeth_begin(),
+ E = IMD ? IMD->instmeth_end() : CID->instmeth_end();
+ I != E; ++I) {
+ std::string ResultStr;
+ ObjCMethodDecl *OMD = *I;
+ RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
+ SourceLocation LocStart = OMD->getLocStart();
+ SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ ReplaceText(LocStart, endBuf-startBuf, ResultStr);
+ }
+
+ for (ObjCCategoryImplDecl::classmeth_iterator
+ I = IMD ? IMD->classmeth_begin() : CID->classmeth_begin(),
+ E = IMD ? IMD->classmeth_end() : CID->classmeth_end();
+ I != E; ++I) {
+ std::string ResultStr;
+ ObjCMethodDecl *OMD = *I;
+ RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
+ SourceLocation LocStart = OMD->getLocStart();
+ SourceLocation LocEnd = OMD->getCompoundBody()->getLocStart();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ ReplaceText(LocStart, endBuf-startBuf, ResultStr);
+ }
+ for (ObjCCategoryImplDecl::propimpl_iterator
+ I = IMD ? IMD->propimpl_begin() : CID->propimpl_begin(),
+ E = IMD ? IMD->propimpl_end() : CID->propimpl_end();
+ I != E; ++I) {
+ RewritePropertyImplDecl(*I, IMD, CID);
+ }
+
+ InsertText(IMD ? IMD->getLocEnd() : CID->getLocEnd(), "// ");
+}
+
+void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
+ std::string ResultStr;
+ if (!ObjCForwardDecls.count(ClassDecl->getCanonicalDecl())) {
+ // we haven't seen a forward decl - generate a typedef.
+ ResultStr = "#ifndef _REWRITER_typedef_";
+ ResultStr += ClassDecl->getNameAsString();
+ ResultStr += "\n";
+ ResultStr += "#define _REWRITER_typedef_";
+ ResultStr += ClassDecl->getNameAsString();
+ ResultStr += "\n";
+ ResultStr += "typedef struct objc_object ";
+ ResultStr += ClassDecl->getNameAsString();
+ ResultStr += ";\n#endif\n";
+ // Mark this typedef as having been generated.
+ ObjCForwardDecls.insert(ClassDecl->getCanonicalDecl());
+ }
+ RewriteObjCInternalStruct(ClassDecl, ResultStr);
+
+ for (ObjCInterfaceDecl::prop_iterator I = ClassDecl->prop_begin(),
+ E = ClassDecl->prop_end(); I != E; ++I)
+ RewriteProperty(*I);
+ for (ObjCInterfaceDecl::instmeth_iterator
+ I = ClassDecl->instmeth_begin(), E = ClassDecl->instmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+ for (ObjCInterfaceDecl::classmeth_iterator
+ I = ClassDecl->classmeth_begin(), E = ClassDecl->classmeth_end();
+ I != E; ++I)
+ RewriteMethodDeclaration(*I);
+
+ // Lastly, comment out the @end.
+ ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
+ "/* @end */");
+}
+
+Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
+ SourceRange OldRange = PseudoOp->getSourceRange();
+
+ // We just magically know some things about the structure of this
+ // expression.
+ ObjCMessageExpr *OldMsg =
+ cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
+ PseudoOp->getNumSemanticExprs() - 1));
+
+ // Because the rewriter doesn't allow us to rewrite rewritten code,
+ // we need to suppress rewriting the sub-statements.
+ Expr *Base, *RHS;
+ {
+ DisableReplaceStmtScope S(*this);
+
+ // Rebuild the base expression if we have one.
+ Base = 0;
+ if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
+ Base = OldMsg->getInstanceReceiver();
+ Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
+ Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
+ }
+
+ // Rebuild the RHS.
+ RHS = cast<BinaryOperator>(PseudoOp->getSyntacticForm())->getRHS();
+ RHS = cast<OpaqueValueExpr>(RHS)->getSourceExpr();
+ RHS = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(RHS));
+ }
+
+ // TODO: avoid this copy.
+ SmallVector<SourceLocation, 1> SelLocs;
+ OldMsg->getSelectorLocs(SelLocs);
+
+ ObjCMessageExpr *NewMsg = 0;
+ switch (OldMsg->getReceiverKind()) {
+ case ObjCMessageExpr::Class:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getClassReceiverTypeInfo(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ RHS,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::Instance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ Base,
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ RHS,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::SuperClass:
+ case ObjCMessageExpr::SuperInstance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getSuperLoc(),
+ OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
+ OldMsg->getSuperType(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ RHS,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+ }
+
+ Stmt *Replacement = SynthMessageExpr(NewMsg);
+ ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
+ return Replacement;
+}
+
+Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
+ SourceRange OldRange = PseudoOp->getSourceRange();
+
+ // We just magically know some things about the structure of this
+ // expression.
+ ObjCMessageExpr *OldMsg =
+ cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
+
+ // Because the rewriter doesn't allow us to rewrite rewritten code,
+ // we need to suppress rewriting the sub-statements.
+ Expr *Base = 0;
+ {
+ DisableReplaceStmtScope S(*this);
+
+ // Rebuild the base expression if we have one.
+ if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
+ Base = OldMsg->getInstanceReceiver();
+ Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
+ Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
+ }
+ }
+
+ // Intentionally empty.
+ SmallVector<SourceLocation, 1> SelLocs;
+ SmallVector<Expr*, 1> Args;
+
+ ObjCMessageExpr *NewMsg = 0;
+ switch (OldMsg->getReceiverKind()) {
+ case ObjCMessageExpr::Class:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getClassReceiverTypeInfo(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::Instance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ Base,
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+
+ case ObjCMessageExpr::SuperClass:
+ case ObjCMessageExpr::SuperInstance:
+ NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
+ OldMsg->getValueKind(),
+ OldMsg->getLeftLoc(),
+ OldMsg->getSuperLoc(),
+ OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
+ OldMsg->getSuperType(),
+ OldMsg->getSelector(),
+ SelLocs,
+ OldMsg->getMethodDecl(),
+ Args,
+ OldMsg->getRightLoc(),
+ OldMsg->isImplicit());
+ break;
+ }
+
+ Stmt *Replacement = SynthMessageExpr(NewMsg);
+ ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
+ return Replacement;
+}
+
+/// SynthCountByEnumWithState - To print:
+/// ((unsigned int (*)
+/// (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
+/// (void *)objc_msgSend)((id)l_collection,
+/// sel_registerName(
+/// "countByEnumeratingWithState:objects:count:"),
+/// &enumState,
+/// (id *)__rw_items, (unsigned int)16)
+///
+void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
+ buf += "((unsigned int (*) (id, SEL, struct __objcFastEnumerationState *, "
+ "id *, unsigned int))(void *)objc_msgSend)";
+ buf += "\n\t\t";
+ buf += "((id)l_collection,\n\t\t";
+ buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
+ buf += "\n\t\t";
+ buf += "&enumState, "
+ "(id *)__rw_items, (unsigned int)16)";
+}
+
+/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
+/// statement to exit to its outer synthesized loop.
+///
+Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
+ if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
+ return S;
+ // replace break with goto __break_label
+ std::string buf;
+
+ SourceLocation startLoc = S->getLocStart();
+ buf = "goto __break_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ ReplaceText(startLoc, strlen("break"), buf);
+
+ return 0;
+}
+
+/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
+/// statement to continue with its inner synthesized loop.
+///
+Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
+ if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
+ return S;
+ // replace continue with goto __continue_label
+ std::string buf;
+
+ SourceLocation startLoc = S->getLocStart();
+ buf = "goto __continue_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ ReplaceText(startLoc, strlen("continue"), buf);
+
+ return 0;
+}
+
+/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
+/// It rewrites:
+/// for ( type elem in collection) { stmts; }
+
+/// Into:
+/// {
+/// type elem;
+/// struct __objcFastEnumerationState enumState = { 0 };
+/// id __rw_items[16];
+/// id l_collection = (id)collection;
+/// unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
+/// objects:__rw_items count:16];
+/// if (limit) {
+/// unsigned long startMutations = *enumState.mutationsPtr;
+/// do {
+/// unsigned long counter = 0;
+/// do {
+/// if (startMutations != *enumState.mutationsPtr)
+/// objc_enumerationMutation(l_collection);
+/// elem = (type)enumState.itemsPtr[counter++];
+/// stmts;
+/// __continue_label: ;
+/// } while (counter < limit);
+/// } while (limit = [l_collection countByEnumeratingWithState:&enumState
+/// objects:__rw_items count:16]);
+/// elem = nil;
+/// __break_label: ;
+/// }
+/// else
+/// elem = nil;
+/// }
+///
+Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
+ SourceLocation OrigEnd) {
+ assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty");
+ assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&
+ "ObjCForCollectionStmt Statement stack mismatch");
+ assert(!ObjCBcLabelNo.empty() &&
+ "ObjCForCollectionStmt - Label No stack empty");
+
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+ StringRef elementName;
+ std::string elementTypeAsString;
+ std::string buf;
+ buf = "\n{\n\t";
+ if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
+ // type elem;
+ NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
+ QualType ElementType = cast<ValueDecl>(D)->getType();
+ if (ElementType->isObjCQualifiedIdType() ||
+ ElementType->isObjCQualifiedInterfaceType())
+ // Simply use 'id' for all qualified types.
+ elementTypeAsString = "id";
+ else
+ elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
+ buf += elementTypeAsString;
+ buf += " ";
+ elementName = D->getName();
+ buf += elementName;
+ buf += ";\n\t";
+ }
+ else {
+ DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
+ elementName = DR->getDecl()->getName();
+ ValueDecl *VD = cast<ValueDecl>(DR->getDecl());
+ if (VD->getType()->isObjCQualifiedIdType() ||
+ VD->getType()->isObjCQualifiedInterfaceType())
+ // Simply use 'id' for all qualified types.
+ elementTypeAsString = "id";
+ else
+ elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
+ }
+
+ // struct __objcFastEnumerationState enumState = { 0 };
+ buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
+ // id __rw_items[16];
+ buf += "id __rw_items[16];\n\t";
+ // id l_collection = (id)
+ buf += "id l_collection = (id)";
+ // Find start location of 'collection' the hard way!
+ const char *startCollectionBuf = startBuf;
+ startCollectionBuf += 3; // skip 'for'
+ startCollectionBuf = strchr(startCollectionBuf, '(');
+ startCollectionBuf++; // skip '('
+ // find 'in' and skip it.
+ while (*startCollectionBuf != ' ' ||
+ *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
+ (*(startCollectionBuf+3) != ' ' &&
+ *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
+ startCollectionBuf++;
+ startCollectionBuf += 3;
+
+ // Replace: "for (type element in" with string constructed thus far.
+ ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
+ // Replace ')' in for '(' type elem in collection ')' with ';'
+ SourceLocation rightParenLoc = S->getRParenLoc();
+ const char *rparenBuf = SM->getCharacterData(rightParenLoc);
+ SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
+ buf = ";\n\t";
+
+ // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
+ // objects:__rw_items count:16];
+ // which is synthesized into:
+ // unsigned int limit =
+ // ((unsigned int (*)
+ // (id, SEL, struct __objcFastEnumerationState *, id *, unsigned int))
+ // (void *)objc_msgSend)((id)l_collection,
+ // sel_registerName(
+ // "countByEnumeratingWithState:objects:count:"),
+ // (struct __objcFastEnumerationState *)&state,
+ // (id *)__rw_items, (unsigned int)16);
+ buf += "unsigned long limit =\n\t\t";
+ SynthCountByEnumWithState(buf);
+ buf += ";\n\t";
+ /// if (limit) {
+ /// unsigned long startMutations = *enumState.mutationsPtr;
+ /// do {
+ /// unsigned long counter = 0;
+ /// do {
+ /// if (startMutations != *enumState.mutationsPtr)
+ /// objc_enumerationMutation(l_collection);
+ /// elem = (type)enumState.itemsPtr[counter++];
+ buf += "if (limit) {\n\t";
+ buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
+ buf += "do {\n\t\t";
+ buf += "unsigned long counter = 0;\n\t\t";
+ buf += "do {\n\t\t\t";
+ buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
+ buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
+ buf += elementName;
+ buf += " = (";
+ buf += elementTypeAsString;
+ buf += ")enumState.itemsPtr[counter++];";
+ // Replace ')' in for '(' type elem in collection ')' with all of these.
+ ReplaceText(lparenLoc, 1, buf);
+
+ /// __continue_label: ;
+ /// } while (counter < limit);
+ /// } while (limit = [l_collection countByEnumeratingWithState:&enumState
+ /// objects:__rw_items count:16]);
+ /// elem = nil;
+ /// __break_label: ;
+ /// }
+ /// else
+ /// elem = nil;
+ /// }
+ ///
+ buf = ";\n\t";
+ buf += "__continue_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ buf += ": ;";
+ buf += "\n\t\t";
+ buf += "} while (counter < limit);\n\t";
+ buf += "} while (limit = ";
+ SynthCountByEnumWithState(buf);
+ buf += ");\n\t";
+ buf += elementName;
+ buf += " = ((";
+ buf += elementTypeAsString;
+ buf += ")0);\n\t";
+ buf += "__break_label_";
+ buf += utostr(ObjCBcLabelNo.back());
+ buf += ": ;\n\t";
+ buf += "}\n\t";
+ buf += "else\n\t\t";
+ buf += elementName;
+ buf += " = ((";
+ buf += elementTypeAsString;
+ buf += ")0);\n\t";
+ buf += "}\n";
+
+ // Insert all these *after* the statement body.
+ // FIXME: If this should support Obj-C++, support CXXTryStmt
+ if (isa<CompoundStmt>(S->getBody())) {
+ SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
+ InsertText(endBodyLoc, buf);
+ } else {
+ /* Need to treat single statements specially. For example:
+ *
+ * for (A *a in b) if (stuff()) break;
+ * for (A *a in b) xxxyy;
+ *
+ * The following code simply scans ahead to the semi to find the actual end.
+ */
+ const char *stmtBuf = SM->getCharacterData(OrigEnd);
+ const char *semiBuf = strchr(stmtBuf, ';');
+ assert(semiBuf && "Can't find ';'");
+ SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
+ InsertText(endBodyLoc, buf);
+ }
+ Stmts.pop_back();
+ ObjCBcLabelNo.pop_back();
+ return 0;
+}
+
+/// RewriteObjCSynchronizedStmt -
+/// This routine rewrites @synchronized(expr) stmt;
+/// into:
+/// objc_sync_enter(expr);
+/// @try stmt @finally { objc_sync_exit(expr); }
+///
+Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @synchronized location");
+
+ std::string buf;
+ buf = "objc_sync_enter((id)";
+ const char *lparenBuf = startBuf;
+ while (*lparenBuf != '(') lparenBuf++;
+ ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
+ // We can't use S->getSynchExpr()->getLocEnd() to find the end location, since
+ // the sync expression is typically a message expression that's already
+ // been rewritten! (which implies the SourceLocation's are invalid).
+ SourceLocation endLoc = S->getSynchBody()->getLocStart();
+ const char *endBuf = SM->getCharacterData(endLoc);
+ while (*endBuf != ')') endBuf--;
+ SourceLocation rparenLoc = startLoc.getLocWithOffset(endBuf-startBuf);
+ buf = ");\n";
+ // declare a new scope with two variables, _stack and _rethrow.
+ buf += "/* @try scope begin */ \n{ struct _objc_exception_data {\n";
+ buf += "int buf[18/*32-bit i386*/];\n";
+ buf += "char *pointers[4];} _stack;\n";
+ buf += "id volatile _rethrow = 0;\n";
+ buf += "objc_exception_try_enter(&_stack);\n";
+ buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
+ ReplaceText(rparenLoc, 1, buf);
+ startLoc = S->getSynchBody()->getLocEnd();
+ startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '}') && "bogus @synchronized block");
+ SourceLocation lastCurlyLoc = startLoc;
+ buf = "}\nelse {\n";
+ buf += " _rethrow = objc_exception_extract(&_stack);\n";
+ buf += "}\n";
+ buf += "{ /* implicit finally clause */\n";
+ buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
+
+ std::string syncBuf;
+ syncBuf += " objc_sync_exit(";
+
+ Expr *syncExpr = S->getSynchExpr();
+ CastKind CK = syncExpr->getType()->isObjCObjectPointerType()
+ ? CK_BitCast :
+ syncExpr->getType()->isBlockPointerType()
+ ? CK_BlockPointerToObjCPointerCast
+ : CK_CPointerToObjCPointerCast;
+ syncExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, syncExpr);
+ std::string syncExprBufS;
+ llvm::raw_string_ostream syncExprBuf(syncExprBufS);
+ syncExpr->printPretty(syncExprBuf, *Context, 0,
+ PrintingPolicy(LangOpts));
+ syncBuf += syncExprBuf.str();
+ syncBuf += ");";
+
+ buf += syncBuf;
+ buf += "\n if (_rethrow) objc_exception_throw(_rethrow);\n";
+ buf += "}\n";
+ buf += "}";
+
+ ReplaceText(lastCurlyLoc, 1, buf);
+
+ bool hasReturns = false;
+ HasReturnStmts(S->getSynchBody(), hasReturns);
+ if (hasReturns)
+ RewriteSyncReturnStmts(S->getSynchBody(), syncBuf);
+
+ return 0;
+}
+
+void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
+{
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI)
+ WarnAboutReturnGotoStmts(*CI);
+
+ if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
+ Diags.Report(Context->getFullLoc(S->getLocStart()),
+ TryFinallyContainsReturnDiag);
+ }
+ return;
+}
+
+void RewriteModernObjC::HasReturnStmts(Stmt *S, bool &hasReturns)
+{
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI)
+ HasReturnStmts(*CI, hasReturns);
+
+ if (isa<ReturnStmt>(S))
+ hasReturns = true;
+ return;
+}
+
+void RewriteModernObjC::RewriteTryReturnStmts(Stmt *S) {
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ RewriteTryReturnStmts(*CI);
+ }
+ if (isa<ReturnStmt>(S)) {
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "RewriteTryReturnStmts: can't find ';'");
+ SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ std::string buf;
+ buf = "{ objc_exception_try_exit(&_stack); return";
+
+ ReplaceText(startLoc, 6, buf);
+ InsertText(onePastSemiLoc, "}");
+ }
+ return;
+}
+
+void RewriteModernObjC::RewriteSyncReturnStmts(Stmt *S, std::string syncExitBuf) {
+ // Perform a bottom up traversal of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ RewriteSyncReturnStmts(*CI, syncExitBuf);
+ }
+ if (isa<ReturnStmt>(S)) {
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "RewriteSyncReturnStmts: can't find ';'");
+ SourceLocation onePastSemiLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
+
+ std::string buf;
+ buf = "{ objc_exception_try_exit(&_stack);";
+ buf += syncExitBuf;
+ buf += " return";
+
+ ReplaceText(startLoc, 6, buf);
+ InsertText(onePastSemiLoc, "}");
+ }
+ return;
+}
+
+Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @try location");
+
+ std::string buf;
+ // declare a new scope with two variables, _stack and _rethrow.
+ buf = "/* @try scope begin */ { struct _objc_exception_data {\n";
+ buf += "int buf[18/*32-bit i386*/];\n";
+ buf += "char *pointers[4];} _stack;\n";
+ buf += "id volatile _rethrow = 0;\n";
+ buf += "objc_exception_try_enter(&_stack);\n";
+ buf += "if (!_setjmp(_stack.buf)) /* @try block continue */\n";
+
+ ReplaceText(startLoc, 4, buf);
+
+ startLoc = S->getTryBody()->getLocEnd();
+ startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '}') && "bogus @try block");
+
+ SourceLocation lastCurlyLoc = startLoc;
+ if (S->getNumCatchStmts()) {
+ startLoc = startLoc.getLocWithOffset(1);
+ buf = " /* @catch begin */ else {\n";
+ buf += " id _caught = objc_exception_extract(&_stack);\n";
+ buf += " objc_exception_try_enter (&_stack);\n";
+ buf += " if (_setjmp(_stack.buf))\n";
+ buf += " _rethrow = objc_exception_extract(&_stack);\n";
+ buf += " else { /* @catch continue */";
+
+ InsertText(startLoc, buf);
+ } else { /* no catch list */
+ buf = "}\nelse {\n";
+ buf += " _rethrow = objc_exception_extract(&_stack);\n";
+ buf += "}";
+ ReplaceText(lastCurlyLoc, 1, buf);
+ }
+ Stmt *lastCatchBody = 0;
+ for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
+ ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
+ VarDecl *catchDecl = Catch->getCatchParamDecl();
+
+ if (I == 0)
+ buf = "if ("; // we are generating code for the first catch clause
+ else
+ buf = "else if (";
+ startLoc = Catch->getLocStart();
+ startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @catch location");
+
+ const char *lParenLoc = strchr(startBuf, '(');
+
+ if (Catch->hasEllipsis()) {
+ // Now rewrite the body...
+ lastCatchBody = Catch->getCatchBody();
+ SourceLocation bodyLoc = lastCatchBody->getLocStart();
+ const char *bodyBuf = SM->getCharacterData(bodyLoc);
+ assert(*SM->getCharacterData(Catch->getRParenLoc()) == ')' &&
+ "bogus @catch paren location");
+ assert((*bodyBuf == '{') && "bogus @catch body location");
+
+ buf += "1) { id _tmp = _caught;";
+ Rewrite.ReplaceText(startLoc, bodyBuf-startBuf+1, buf);
+ } else if (catchDecl) {
+ QualType t = catchDecl->getType();
+ if (t == Context->getObjCIdType()) {
+ buf += "1) { ";
+ ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
+ } else if (const ObjCObjectPointerType *Ptr =
+ t->getAs<ObjCObjectPointerType>()) {
+ // Should be a pointer to a class.
+ ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
+ if (IDecl) {
+ buf += "objc_exception_match((struct objc_class *)objc_getClass(\"";
+ buf += IDecl->getNameAsString();
+ buf += "\"), (struct objc_object *)_caught)) { ";
+ ReplaceText(startLoc, lParenLoc-startBuf+1, buf);
+ }
+ }
+ // Now rewrite the body...
+ lastCatchBody = Catch->getCatchBody();
+ SourceLocation rParenLoc = Catch->getRParenLoc();
+ SourceLocation bodyLoc = lastCatchBody->getLocStart();
+ const char *bodyBuf = SM->getCharacterData(bodyLoc);
+ const char *rParenBuf = SM->getCharacterData(rParenLoc);
+ assert((*rParenBuf == ')') && "bogus @catch paren location");
+ assert((*bodyBuf == '{') && "bogus @catch body location");
+
+ // Here we replace ") {" with "= _caught;" (which initializes and
+ // declares the @catch parameter).
+ ReplaceText(rParenLoc, bodyBuf-rParenBuf+1, " = _caught;");
+ } else {
+ llvm_unreachable("@catch rewrite bug");
+ }
+ }
+ // Complete the catch list...
+ if (lastCatchBody) {
+ SourceLocation bodyLoc = lastCatchBody->getLocEnd();
+ assert(*SM->getCharacterData(bodyLoc) == '}' &&
+ "bogus @catch body location");
+
+ // Insert the last (implicit) else clause *before* the right curly brace.
+ bodyLoc = bodyLoc.getLocWithOffset(-1);
+ buf = "} /* last catch end */\n";
+ buf += "else {\n";
+ buf += " _rethrow = _caught;\n";
+ buf += " objc_exception_try_exit(&_stack);\n";
+ buf += "} } /* @catch end */\n";
+ if (!S->getFinallyStmt())
+ buf += "}\n";
+ InsertText(bodyLoc, buf);
+
+ // Set lastCurlyLoc
+ lastCurlyLoc = lastCatchBody->getLocEnd();
+ }
+ if (ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt()) {
+ startLoc = finalStmt->getLocStart();
+ startBuf = SM->getCharacterData(startLoc);
+ assert((*startBuf == '@') && "bogus @finally start");
+
+ ReplaceText(startLoc, 8, "/* @finally */");
+
+ Stmt *body = finalStmt->getFinallyBody();
+ SourceLocation startLoc = body->getLocStart();
+ SourceLocation endLoc = body->getLocEnd();
+ assert(*SM->getCharacterData(startLoc) == '{' &&
+ "bogus @finally body location");
+ assert(*SM->getCharacterData(endLoc) == '}' &&
+ "bogus @finally body location");
+
+ startLoc = startLoc.getLocWithOffset(1);
+ InsertText(startLoc, " if (!_rethrow) objc_exception_try_exit(&_stack);\n");
+ endLoc = endLoc.getLocWithOffset(-1);
+ InsertText(endLoc, " if (_rethrow) objc_exception_throw(_rethrow);\n");
+
+ // Set lastCurlyLoc
+ lastCurlyLoc = body->getLocEnd();
+
+ // Now check for any return/continue/go statements within the @try.
+ WarnAboutReturnGotoStmts(S->getTryBody());
+ } else { /* no finally clause - make sure we synthesize an implicit one */
+ buf = "{ /* implicit finally clause */\n";
+ buf += " if (!_rethrow) objc_exception_try_exit(&_stack);\n";
+ buf += " if (_rethrow) objc_exception_throw(_rethrow);\n";
+ buf += "}";
+ ReplaceText(lastCurlyLoc, 1, buf);
+
+ // Now check for any return/continue/go statements within the @try.
+ // The implicit finally clause won't called if the @try contains any
+ // jump statements.
+ bool hasReturns = false;
+ HasReturnStmts(S->getTryBody(), hasReturns);
+ if (hasReturns)
+ RewriteTryReturnStmts(S->getTryBody());
+ }
+ // Now emit the final closing curly brace...
+ lastCurlyLoc = lastCurlyLoc.getLocWithOffset(1);
+ InsertText(lastCurlyLoc, " } /* @try scope end */\n");
+ return 0;
+}
+
+// This can't be done with ReplaceStmt(S, ThrowExpr), since
+// the throw expression is typically a message expression that's already
+// been rewritten! (which implies the SourceLocation's are invalid).
+Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
+ // Get the start location and compute the semi location.
+ SourceLocation startLoc = S->getLocStart();
+ const char *startBuf = SM->getCharacterData(startLoc);
+
+ assert((*startBuf == '@') && "bogus @throw location");
+
+ std::string buf;
+ /* void objc_exception_throw(id) __attribute__((noreturn)); */
+ if (S->getThrowExpr())
+ buf = "objc_exception_throw(";
+ else // add an implicit argument
+ buf = "objc_exception_throw(_caught";
+
+ // handle "@ throw" correctly.
+ const char *wBuf = strchr(startBuf, 'w');
+ assert((*wBuf == 'w') && "@throw: can't find 'w'");
+ ReplaceText(startLoc, wBuf-startBuf+1, buf);
+
+ const char *semiBuf = strchr(startBuf, ';');
+ assert((*semiBuf == ';') && "@throw: can't find ';'");
+ SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
+ ReplaceText(semiLoc, 1, ");");
+ return 0;
+}
+
+Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
+ // Create a new string expression.
+ QualType StrType = Context->getPointerType(Context->CharTy);
+ std::string StrEncoding;
+ Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
+ Expr *Replacement = StringLiteral::Create(*Context, StrEncoding,
+ StringLiteral::Ascii, false,
+ StrType, SourceLocation());
+ ReplaceStmt(Exp, Replacement);
+
+ // Replace this subexpr in the parent.
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return Replacement;
+}
+
+Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl");
+ // Create a call to sel_registerName("selName").
+ SmallVector<Expr*, 8> SelExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ Exp->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size());
+ ReplaceStmt(Exp, SelExp);
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return SelExp;
+}
+
+CallExpr *RewriteModernObjC::SynthesizeCallToFunctionDecl(
+ FunctionDecl *FD, Expr **args, unsigned nargs, SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = FD->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE =
+ new (Context) DeclRefExpr(FD, msgSendType, VK_LValue, SourceLocation());
+
+ // Now, we cast the reference to a pointer to the objc_msgSend type.
+ QualType pToFunc = Context->getPointerType(msgSendType);
+ ImplicitCastExpr *ICE =
+ ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
+ DRE, 0, VK_RValue);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+
+ CallExpr *Exp =
+ new (Context) CallExpr(*Context, ICE, args, nargs,
+ FT->getCallResultType(*Context),
+ VK_RValue, EndLoc);
+ return Exp;
+}
+
+static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
+ const char *&startRef, const char *&endRef) {
+ while (startBuf < endBuf) {
+ if (*startBuf == '<')
+ startRef = startBuf; // mark the start.
+ if (*startBuf == '>') {
+ if (startRef && *startRef == '<') {
+ endRef = startBuf; // mark the end.
+ return true;
+ }
+ return false;
+ }
+ startBuf++;
+ }
+ return false;
+}
+
+static void scanToNextArgument(const char *&argRef) {
+ int angle = 0;
+ while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
+ if (*argRef == '<')
+ angle++;
+ else if (*argRef == '>')
+ angle--;
+ argRef++;
+ }
+ assert(angle == 0 && "scanToNextArgument - bad protocol type syntax");
+}
+
+bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
+ if (T->isObjCQualifiedIdType())
+ return true;
+ if (const PointerType *PT = T->getAs<PointerType>()) {
+ if (PT->getPointeeType()->isObjCQualifiedIdType())
+ return true;
+ }
+ if (T->isObjCObjectPointerType()) {
+ T = T->getPointeeType();
+ return T->isObjCQualifiedInterfaceType();
+ }
+ if (T->isArrayType()) {
+ QualType ElemTy = Context->getBaseElementType(T);
+ return needToScanForQualifiers(ElemTy);
+ }
+ return false;
+}
+
+void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
+ QualType Type = E->getType();
+ if (needToScanForQualifiers(Type)) {
+ SourceLocation Loc, EndLoc;
+
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
+ Loc = ECE->getLParenLoc();
+ EndLoc = ECE->getRParenLoc();
+ } else {
+ Loc = E->getLocStart();
+ EndLoc = E->getLocEnd();
+ }
+ // This will defend against trying to rewrite synthesized expressions.
+ if (Loc.isInvalid() || EndLoc.isInvalid())
+ return;
+
+ const char *startBuf = SM->getCharacterData(Loc);
+ const char *endBuf = SM->getCharacterData(EndLoc);
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
+ SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ }
+}
+
+void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
+ SourceLocation Loc;
+ QualType Type;
+ const FunctionProtoType *proto = 0;
+ if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
+ Loc = VD->getLocation();
+ Type = VD->getType();
+ }
+ else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
+ Loc = FD->getLocation();
+ // Check for ObjC 'id' and class types that have been adorned with protocol
+ // information (id<p>, C<p>*). The protocol references need to be rewritten!
+ const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
+ assert(funcType && "missing function type");
+ proto = dyn_cast<FunctionProtoType>(funcType);
+ if (!proto)
+ return;
+ Type = proto->getResultType();
+ }
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
+ Loc = FD->getLocation();
+ Type = FD->getType();
+ }
+ else
+ return;
+
+ if (needToScanForQualifiers(Type)) {
+ // Since types are unique, we need to scan the buffer.
+
+ const char *endBuf = SM->getCharacterData(Loc);
+ const char *startBuf = endBuf;
+ while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
+ startBuf--; // scan backward (from the decl location) for return type.
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
+ SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ }
+ if (!proto)
+ return; // most likely, was a variable
+ // Now check arguments.
+ const char *startBuf = SM->getCharacterData(Loc);
+ const char *startFuncBuf = startBuf;
+ for (unsigned i = 0; i < proto->getNumArgs(); i++) {
+ if (needToScanForQualifiers(proto->getArgType(i))) {
+ // Since types are unique, we need to scan the buffer.
+
+ const char *endBuf = startBuf;
+ // scan forward (from the decl location) for argument types.
+ scanToNextArgument(endBuf);
+ const char *startRef = 0, *endRef = 0;
+ if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
+ // Get the locations of the startRef, endRef.
+ SourceLocation LessLoc =
+ Loc.getLocWithOffset(startRef-startFuncBuf);
+ SourceLocation GreaterLoc =
+ Loc.getLocWithOffset(endRef-startFuncBuf+1);
+ // Comment out the protocol references.
+ InsertText(LessLoc, "/*");
+ InsertText(GreaterLoc, "*/");
+ }
+ startBuf = ++endBuf;
+ }
+ else {
+ // If the function name is derived from a macro expansion, then the
+ // argument buffer will not follow the name. Need to speak with Chris.
+ while (*startBuf && *startBuf != ')' && *startBuf != ',')
+ startBuf++; // scan forward (from the decl location) for argument types.
+ startBuf++;
+ }
+ }
+}
+
+void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
+ QualType QT = ND->getType();
+ const Type* TypePtr = QT->getAs<Type>();
+ if (!isa<TypeOfExprType>(TypePtr))
+ return;
+ while (isa<TypeOfExprType>(TypePtr)) {
+ const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
+ QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
+ TypePtr = QT->getAs<Type>();
+ }
+ // FIXME. This will not work for multiple declarators; as in:
+ // __typeof__(a) b,c,d;
+ std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
+ SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ if (ND->getInit()) {
+ std::string Name(ND->getNameAsString());
+ TypeAsString += " " + Name + " = ";
+ Expr *E = ND->getInit();
+ SourceLocation startLoc;
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
+ startLoc = ECE->getLParenLoc();
+ else
+ startLoc = E->getLocStart();
+ startLoc = SM->getExpansionLoc(startLoc);
+ const char *endBuf = SM->getCharacterData(startLoc);
+ ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
+ }
+ else {
+ SourceLocation X = ND->getLocEnd();
+ X = SM->getExpansionLoc(X);
+ const char *endBuf = SM->getCharacterData(X);
+ ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
+ }
+}
+
+// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
+void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
+ IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getFuncType =
+ getSimpleFunctionType(Context->getObjCSelType(), &ArgTys[0], ArgTys.size());
+ SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ SelGetUidIdent, getFuncType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
+ // declared in <objc/objc.h>
+ if (FD->getIdentifier() &&
+ FD->getName() == "sel_registerName") {
+ SelGetUidFunctionDecl = FD;
+ return;
+ }
+ RewriteObjCQualifiedInterfaceTypes(FD);
+}
+
+void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
+ std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
+ const char *argPtr = TypeString.c_str();
+ if (!strchr(argPtr, '^')) {
+ Str += TypeString;
+ return;
+ }
+ while (*argPtr) {
+ Str += (*argPtr == '^' ? '*' : *argPtr);
+ argPtr++;
+ }
+}
+
+// FIXME. Consolidate this routine with RewriteBlockPointerType.
+void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
+ ValueDecl *VD) {
+ QualType Type = VD->getType();
+ std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
+ const char *argPtr = TypeString.c_str();
+ int paren = 0;
+ while (*argPtr) {
+ switch (*argPtr) {
+ case '(':
+ Str += *argPtr;
+ paren++;
+ break;
+ case ')':
+ Str += *argPtr;
+ paren--;
+ break;
+ case '^':
+ Str += '*';
+ if (paren == 1)
+ Str += VD->getNameAsString();
+ break;
+ default:
+ Str += *argPtr;
+ break;
+ }
+ argPtr++;
+ }
+}
+
+
+void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
+ SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
+ const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
+ const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
+ if (!proto)
+ return;
+ QualType Type = proto->getResultType();
+ std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
+ FdStr += " ";
+ FdStr += FD->getName();
+ FdStr += "(";
+ unsigned numArgs = proto->getNumArgs();
+ for (unsigned i = 0; i < numArgs; i++) {
+ QualType ArgType = proto->getArgType(i);
+ RewriteBlockPointerType(FdStr, ArgType);
+ if (i+1 < numArgs)
+ FdStr += ", ";
+ }
+ FdStr += ");\n";
+ InsertText(FunLocStart, FdStr);
+ CurFunctionDeclToDeclareForBlock = 0;
+}
+
+// SynthSuperContructorFunctionDecl - id objc_super(id obj, id super);
+void RewriteModernObjC::SynthSuperContructorFunctionDecl() {
+ if (SuperContructorFunctionDecl)
+ return;
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ SuperContructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(struct objc_super *, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
+ SmallVector<QualType, 16> ArgTys;
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("objc_super"));
+ QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
+ assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendSuperStretFunctionDecl -
+// id objc_msgSendSuper_stret(struct objc_super *, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
+ IdentifierInfo *msgSendIdent =
+ &Context->Idents.get("objc_msgSendSuper_stret");
+ SmallVector<QualType, 16> ArgTys;
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("objc_super"));
+ QualType argT = Context->getPointerType(Context->getTagDeclType(RD));
+ assert(!argT.isNull() && "Can't build 'struct objc_super *' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
+void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
+ IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
+ SmallVector<QualType, 16> ArgTys;
+ QualType argT = Context->getObjCIdType();
+ assert(!argT.isNull() && "Can't find 'id' type");
+ ArgTys.push_back(argT);
+ argT = Context->getObjCSelType();
+ assert(!argT.isNull() && "Can't find 'SEL' type");
+ ArgTys.push_back(argT);
+ QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
+ &ArgTys[0], ArgTys.size(),
+ true /*isVariadic*/);
+ MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ msgSendIdent, msgSendType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthGetClassFunctionDecl - id objc_getClass(const char *name);
+void RewriteModernObjC::SynthGetClassFunctionDecl() {
+ IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getClassIdent, getClassType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
+void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
+ IdentifierInfo *getSuperClassIdent =
+ &Context->Idents.get("class_getSuperclass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getObjCClassType());
+ QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
+ &ArgTys[0], ArgTys.size());
+ GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getSuperClassIdent,
+ getClassType, 0,
+ SC_Extern,
+ SC_None,
+ false);
+}
+
+// SynthGetMetaClassFunctionDecl - id objc_getMetaClass(const char *name);
+void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
+ IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
+ SmallVector<QualType, 16> ArgTys;
+ ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
+ QualType getClassType = getSimpleFunctionType(Context->getObjCIdType(),
+ &ArgTys[0], ArgTys.size());
+ GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
+ SourceLocation(),
+ SourceLocation(),
+ getClassIdent, getClassType, 0,
+ SC_Extern,
+ SC_None, false);
+}
+
+Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
+ QualType strType = getConstantStringStructType();
+
+ std::string S = "__NSConstantStringImpl_";
+
+ std::string tmpName = InFileName;
+ unsigned i;
+ for (i=0; i < tmpName.length(); i++) {
+ char c = tmpName.at(i);
+ // replace any non alphanumeric characters with '_'.
+ if (!isalpha(c) && (c < '0' || c > '9'))
+ tmpName[i] = '_';
+ }
+ S += tmpName;
+ S += "_";
+ S += utostr(NumObjCStringLiterals++);
+
+ Preamble += "static __NSConstantStringImpl " + S;
+ Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
+ Preamble += "0x000007c8,"; // utf8_str
+ // The pretty printer for StringLiteral handles escape characters properly.
+ std::string prettyBufS;
+ llvm::raw_string_ostream prettyBuf(prettyBufS);
+ Exp->getString()->printPretty(prettyBuf, *Context, 0,
+ PrintingPolicy(LangOpts));
+ Preamble += prettyBuf.str();
+ Preamble += ",";
+ Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
+
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), &Context->Idents.get(S),
+ strType, 0, SC_Static, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(NewVD, strType, VK_LValue,
+ SourceLocation());
+ Expr *Unop = new (Context) UnaryOperator(DRE, UO_AddrOf,
+ Context->getPointerType(DRE->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ // cast to NSConstantString *
+ CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
+ CK_CPointerToObjCPointerCast, Unop);
+ ReplaceStmt(Exp, cast);
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return cast;
+}
+
+// struct objc_super { struct objc_object *receiver; struct objc_class *super; };
+QualType RewriteModernObjC::getSuperStructType() {
+ if (!SuperStructDecl) {
+ SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("objc_super"));
+ QualType FieldTypes[2];
+
+ // struct objc_object *receiver;
+ FieldTypes[0] = Context->getObjCIdType();
+ // struct objc_class *super;
+ FieldTypes[1] = Context->getObjCClassType();
+
+ // Create fields
+ for (unsigned i = 0; i < 2; ++i) {
+ SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
+ SourceLocation(),
+ SourceLocation(), 0,
+ FieldTypes[i], 0,
+ /*BitWidth=*/0,
+ /*Mutable=*/false,
+ /*HasInit=*/false));
+ }
+
+ SuperStructDecl->completeDefinition();
+ }
+ return Context->getTagDeclType(SuperStructDecl);
+}
+
+QualType RewriteModernObjC::getConstantStringStructType() {
+ if (!ConstantStringDecl) {
+ ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__NSConstantStringImpl"));
+ QualType FieldTypes[4];
+
+ // struct objc_object *receiver;
+ FieldTypes[0] = Context->getObjCIdType();
+ // int flags;
+ FieldTypes[1] = Context->IntTy;
+ // char *str;
+ FieldTypes[2] = Context->getPointerType(Context->CharTy);
+ // long length;
+ FieldTypes[3] = Context->LongTy;
+
+ // Create fields
+ for (unsigned i = 0; i < 4; ++i) {
+ ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
+ ConstantStringDecl,
+ SourceLocation(),
+ SourceLocation(), 0,
+ FieldTypes[i], 0,
+ /*BitWidth=*/0,
+ /*Mutable=*/true,
+ /*HasInit=*/false));
+ }
+
+ ConstantStringDecl->completeDefinition();
+ }
+ return Context->getTagDeclType(ConstantStringDecl);
+}
+
+Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
+ SourceLocation StartLoc,
+ SourceLocation EndLoc) {
+ if (!SelGetUidFunctionDecl)
+ SynthSelGetUidFunctionDecl();
+ if (!MsgSendFunctionDecl)
+ SynthMsgSendFunctionDecl();
+ if (!MsgSendSuperFunctionDecl)
+ SynthMsgSendSuperFunctionDecl();
+ if (!MsgSendStretFunctionDecl)
+ SynthMsgSendStretFunctionDecl();
+ if (!MsgSendSuperStretFunctionDecl)
+ SynthMsgSendSuperStretFunctionDecl();
+ if (!MsgSendFpretFunctionDecl)
+ SynthMsgSendFpretFunctionDecl();
+ if (!GetClassFunctionDecl)
+ SynthGetClassFunctionDecl();
+ if (!GetSuperClassFunctionDecl)
+ SynthGetSuperClassFunctionDecl();
+ if (!GetMetaClassFunctionDecl)
+ SynthGetMetaClassFunctionDecl();
+
+ // default to objc_msgSend().
+ FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
+ // May need to use objc_msgSend_stret() as well.
+ FunctionDecl *MsgSendStretFlavor = 0;
+ if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
+ QualType resultType = mDecl->getResultType();
+ if (resultType->isRecordType())
+ MsgSendStretFlavor = MsgSendStretFunctionDecl;
+ else if (resultType->isRealFloatingType())
+ MsgSendFlavor = MsgSendFpretFunctionDecl;
+ }
+
+ // Synthesize a call to objc_msgSend().
+ SmallVector<Expr*, 8> MsgExprs;
+ switch (Exp->getReceiverKind()) {
+ case ObjCMessageExpr::SuperClass: {
+ MsgSendFlavor = MsgSendSuperFunctionDecl;
+ if (MsgSendStretFlavor)
+ MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
+ assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
+
+ ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
+
+ SmallVector<Expr*, 4> InitExprs;
+
+ // set the receiver to self, the first argument to all methods.
+ InitExprs.push_back(
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast,
+ new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
+ Context->getObjCIdType(),
+ VK_RValue,
+ SourceLocation()))
+ ); // set the 'receiver'.
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ ClassDecl->getIdentifier()->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc,
+ EndLoc);
+ // (Class)objc_getClass("CurrentClass")
+ CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCClassType(),
+ CK_BitCast, Cls);
+ ClsExprs.clear();
+ ClsExprs.push_back(ArgExpr);
+ Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
+ &ClsExprs[0], ClsExprs.size(),
+ StartLoc, EndLoc);
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ // To turn off a warning, type-cast to 'id'
+ InitExprs.push_back( // set 'super class', using class_getSuperclass().
+ NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCIdType(),
+ CK_BitCast, Cls));
+ // struct objc_super
+ QualType superType = getSuperStructType();
+ Expr *SuperRep;
+
+ if (LangOpts.MicrosoftExt) {
+ SynthSuperContructorFunctionDecl();
+ // Simulate a contructor call...
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
+ superType, VK_LValue,
+ SourceLocation());
+ SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
+ InitExprs.size(),
+ superType, VK_LValue,
+ SourceLocation());
+ // The code for super is a little tricky to prevent collision with
+ // the structure definition in the header. The rewriter has it's own
+ // internal definition (__rw_objc_super) that is uses. This is why
+ // we need the cast below. For example:
+ // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
+ //
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ SuperRep = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(superType),
+ CK_BitCast, SuperRep);
+ } else {
+ // (struct objc_super) { <exprs from above> }
+ InitListExpr *ILE =
+ new (Context) InitListExpr(*Context, SourceLocation(),
+ &InitExprs[0], InitExprs.size(),
+ SourceLocation());
+ TypeSourceInfo *superTInfo
+ = Context->getTrivialTypeSourceInfo(superType);
+ SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
+ superType, VK_LValue,
+ ILE, false);
+ // struct objc_super *
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ }
+ MsgExprs.push_back(SuperRep);
+ break;
+ }
+
+ case ObjCMessageExpr::Class: {
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ObjCInterfaceDecl *Class
+ = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
+ IdentifierInfo *clsName = Class->getIdentifier();
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ clsName->getName(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ MsgExprs.push_back(Cls);
+ break;
+ }
+
+ case ObjCMessageExpr::SuperInstance:{
+ MsgSendFlavor = MsgSendSuperFunctionDecl;
+ if (MsgSendStretFlavor)
+ MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
+ assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
+ ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
+ SmallVector<Expr*, 4> InitExprs;
+
+ InitExprs.push_back(
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast,
+ new (Context) DeclRefExpr(CurMethodDef->getSelfDecl(),
+ Context->getObjCIdType(),
+ VK_RValue, SourceLocation()))
+ ); // set the 'receiver'.
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ SmallVector<Expr*, 8> ClsExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ ClsExprs.push_back(StringLiteral::Create(*Context,
+ ClassDecl->getIdentifier()->getName(),
+ StringLiteral::Ascii, false, argType,
+ SourceLocation()));
+ CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl,
+ &ClsExprs[0],
+ ClsExprs.size(),
+ StartLoc, EndLoc);
+ // (Class)objc_getClass("CurrentClass")
+ CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
+ Context->getObjCClassType(),
+ CK_BitCast, Cls);
+ ClsExprs.clear();
+ ClsExprs.push_back(ArgExpr);
+ Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl,
+ &ClsExprs[0], ClsExprs.size(),
+ StartLoc, EndLoc);
+
+ // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
+ // To turn off a warning, type-cast to 'id'
+ InitExprs.push_back(
+ // set 'super class', using class_getSuperclass().
+ NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK_BitCast, Cls));
+ // struct objc_super
+ QualType superType = getSuperStructType();
+ Expr *SuperRep;
+
+ if (LangOpts.MicrosoftExt) {
+ SynthSuperContructorFunctionDecl();
+ // Simulate a contructor call...
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(SuperContructorFunctionDecl,
+ superType, VK_LValue,
+ SourceLocation());
+ SuperRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0],
+ InitExprs.size(),
+ superType, VK_LValue, SourceLocation());
+ // The code for super is a little tricky to prevent collision with
+ // the structure definition in the header. The rewriter has it's own
+ // internal definition (__rw_objc_super) that is uses. This is why
+ // we need the cast below. For example:
+ // (struct objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
+ //
+ SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
+ Context->getPointerType(SuperRep->getType()),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ SuperRep = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(superType),
+ CK_BitCast, SuperRep);
+ } else {
+ // (struct objc_super) { <exprs from above> }
+ InitListExpr *ILE =
+ new (Context) InitListExpr(*Context, SourceLocation(),
+ &InitExprs[0], InitExprs.size(),
+ SourceLocation());
+ TypeSourceInfo *superTInfo
+ = Context->getTrivialTypeSourceInfo(superType);
+ SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
+ superType, VK_RValue, ILE,
+ false);
+ }
+ MsgExprs.push_back(SuperRep);
+ break;
+ }
+
+ case ObjCMessageExpr::Instance: {
+ // Remove all type-casts because it may contain objc-style types; e.g.
+ // Foo<Proto> *.
+ Expr *recExpr = Exp->getInstanceReceiver();
+ while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
+ recExpr = CE->getSubExpr();
+ CastKind CK = recExpr->getType()->isObjCObjectPointerType()
+ ? CK_BitCast : recExpr->getType()->isBlockPointerType()
+ ? CK_BlockPointerToObjCPointerCast
+ : CK_CPointerToObjCPointerCast;
+
+ recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, recExpr);
+ MsgExprs.push_back(recExpr);
+ break;
+ }
+ }
+
+ // Create a call to sel_registerName("selName"), it will be the 2nd argument.
+ SmallVector<Expr*, 8> SelExprs;
+ QualType argType = Context->getPointerType(Context->CharTy);
+ SelExprs.push_back(StringLiteral::Create(*Context,
+ Exp->getSelector().getAsString(),
+ StringLiteral::Ascii, false,
+ argType, SourceLocation()));
+ CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
+ &SelExprs[0], SelExprs.size(),
+ StartLoc,
+ EndLoc);
+ MsgExprs.push_back(SelExp);
+
+ // Now push any user supplied arguments.
+ for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
+ Expr *userExpr = Exp->getArg(i);
+ // Make all implicit casts explicit...ICE comes in handy:-)
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
+ // Reuse the ICE type, it is exactly what the doctor ordered.
+ QualType type = ICE->getType();
+ if (needToScanForQualifiers(type))
+ type = Context->getObjCIdType();
+ // Make sure we convert "type (^)(...)" to "type (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(type);
+ const Expr *SubExpr = ICE->IgnoreParenImpCasts();
+ CastKind CK;
+ if (SubExpr->getType()->isIntegralType(*Context) &&
+ type->isBooleanType()) {
+ CK = CK_IntegralToBoolean;
+ } else if (type->isObjCObjectPointerType()) {
+ if (SubExpr->getType()->isBlockPointerType()) {
+ CK = CK_BlockPointerToObjCPointerCast;
+ } else if (SubExpr->getType()->isPointerType()) {
+ CK = CK_CPointerToObjCPointerCast;
+ } else {
+ CK = CK_BitCast;
+ }
+ } else {
+ CK = CK_BitCast;
+ }
+
+ userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
+ }
+ // Make id<P...> cast into an 'id' cast.
+ else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
+ if (CE->getType()->isObjCQualifiedIdType()) {
+ while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
+ userExpr = CE->getSubExpr();
+ CastKind CK;
+ if (userExpr->getType()->isIntegralType(*Context)) {
+ CK = CK_IntegralToPointer;
+ } else if (userExpr->getType()->isBlockPointerType()) {
+ CK = CK_BlockPointerToObjCPointerCast;
+ } else if (userExpr->getType()->isPointerType()) {
+ CK = CK_CPointerToObjCPointerCast;
+ } else {
+ CK = CK_BitCast;
+ }
+ userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
+ CK, userExpr);
+ }
+ }
+ MsgExprs.push_back(userExpr);
+ // We've transferred the ownership to MsgExprs. For now, we *don't* null
+ // out the argument in the original expression (since we aren't deleting
+ // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
+ //Exp->setArg(i, 0);
+ }
+ // Generate the funky cast.
+ CastExpr *cast;
+ SmallVector<QualType, 8> ArgTypes;
+ QualType returnType;
+
+ // Push 'id' and 'SEL', the 2 implicit arguments.
+ if (MsgSendFlavor == MsgSendSuperFunctionDecl)
+ ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
+ else
+ ArgTypes.push_back(Context->getObjCIdType());
+ ArgTypes.push_back(Context->getObjCSelType());
+ if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
+ // Push any user argument types.
+ for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
+ E = OMD->param_end(); PI != E; ++PI) {
+ QualType t = (*PI)->getType()->isObjCQualifiedIdType()
+ ? Context->getObjCIdType()
+ : (*PI)->getType();
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ (void)convertBlockPointerToFunctionPointer(t);
+ ArgTypes.push_back(t);
+ }
+ returnType = Exp->getType();
+ convertToUnqualifiedObjCType(returnType);
+ (void)convertBlockPointerToFunctionPointer(returnType);
+ } else {
+ returnType = Context->getObjCIdType();
+ }
+ // Get the type, we will need to reference it in a couple spots.
+ QualType msgSendType = MsgSendFlavor->getType();
+
+ // Create a reference to the objc_msgSend() declaration.
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(MsgSendFlavor, msgSendType,
+ VK_LValue, SourceLocation());
+
+ // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
+ // If we don't do this cast, we get the following bizarre warning/note:
+ // xx.m:13: warning: function called through a non-compatible type
+ // xx.m:13: note: if this code is reached, the program will abort
+ cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, DRE);
+
+ // Now do the "normal" pointer to function cast.
+ QualType castType =
+ getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ // If we don't have a method decl, force a variadic cast.
+ Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : true);
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
+
+ const FunctionType *FT = msgSendType->getAs<FunctionType>();
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ EndLoc);
+ Stmt *ReplacingStmt = CE;
+ if (MsgSendStretFlavor) {
+ // We have the method which returns a struct/union. Must also generate
+ // call to objc_msgSend_stret and hang both varieties on a conditional
+ // expression which dictate which one to envoke depending on size of
+ // method's return type.
+
+ // Create a reference to the objc_msgSend_stret() declaration.
+ DeclRefExpr *STDRE = new (Context) DeclRefExpr(MsgSendStretFlavor, msgSendType,
+ VK_LValue, SourceLocation());
+ // Need to cast objc_msgSend_stret to "void *" (see above comment).
+ cast = NoTypeInfoCStyleCastExpr(Context,
+ Context->getPointerType(Context->VoidTy),
+ CK_BitCast, STDRE);
+ // Now do the "normal" pointer to function cast.
+ castType = getSimpleFunctionType(returnType, &ArgTypes[0], ArgTypes.size(),
+ Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : false);
+ castType = Context->getPointerType(castType);
+ cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
+ cast);
+
+ // Don't forget the parens to enforce the proper binding.
+ PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), cast);
+
+ FT = msgSendType->getAs<FunctionType>();
+ CallExpr *STCE = new (Context) CallExpr(*Context, PE, &MsgExprs[0],
+ MsgExprs.size(),
+ FT->getResultType(), VK_RValue,
+ SourceLocation());
+
+ // Build sizeof(returnType)
+ UnaryExprOrTypeTraitExpr *sizeofExpr =
+ new (Context) UnaryExprOrTypeTraitExpr(UETT_SizeOf,
+ Context->getTrivialTypeSourceInfo(returnType),
+ Context->getSizeType(), SourceLocation(),
+ SourceLocation());
+ // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
+ // FIXME: Value of 8 is base on ppc32/x86 ABI for the most common cases.
+ // For X86 it is more complicated and some kind of target specific routine
+ // is needed to decide what to do.
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ IntegerLiteral *limit = IntegerLiteral::Create(*Context,
+ llvm::APInt(IntSize, 8),
+ Context->IntTy,
+ SourceLocation());
+ BinaryOperator *lessThanExpr =
+ new (Context) BinaryOperator(sizeofExpr, limit, BO_LE, Context->IntTy,
+ VK_RValue, OK_Ordinary, SourceLocation());
+ // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
+ ConditionalOperator *CondExpr =
+ new (Context) ConditionalOperator(lessThanExpr,
+ SourceLocation(), CE,
+ SourceLocation(), STCE,
+ returnType, VK_RValue, OK_Ordinary);
+ ReplacingStmt = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ CondExpr);
+ }
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return ReplacingStmt;
+}
+
+Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
+ Stmt *ReplacingStmt = SynthMessageExpr(Exp, Exp->getLocStart(),
+ Exp->getLocEnd());
+
+ // Now do the actual rewrite.
+ ReplaceStmt(Exp, ReplacingStmt);
+
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return ReplacingStmt;
+}
+
+// typedef struct objc_object Protocol;
+QualType RewriteModernObjC::getProtocolType() {
+ if (!ProtocolTypeDecl) {
+ TypeSourceInfo *TInfo
+ = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
+ ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("Protocol"),
+ TInfo);
+ }
+ return Context->getTypeDeclType(ProtocolTypeDecl);
+}
+
+/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
+/// a synthesized/forward data reference (to the protocol's metadata).
+/// The forward references (and metadata) are generated in
+/// RewriteModernObjC::HandleTranslationUnit().
+Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
+ std::string Name = "_OBJC_PROTOCOL_" + Exp->getProtocol()->getNameAsString();
+ IdentifierInfo *ID = &Context->Idents.get(Name);
+ VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), ID, getProtocolType(), 0,
+ SC_Extern, SC_None);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(VD, getProtocolType(), VK_LValue,
+ SourceLocation());
+ Expr *DerefExpr = new (Context) UnaryOperator(DRE, UO_AddrOf,
+ Context->getPointerType(DRE->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, DerefExpr->getType(),
+ CK_BitCast,
+ DerefExpr);
+ ReplaceStmt(Exp, castExpr);
+ ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
+ // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
+ return castExpr;
+
+}
+
+bool RewriteModernObjC::BufferContainsPPDirectives(const char *startBuf,
+ const char *endBuf) {
+ while (startBuf < endBuf) {
+ if (*startBuf == '#') {
+ // Skip whitespace.
+ for (++startBuf; startBuf[0] == ' ' || startBuf[0] == '\t'; ++startBuf)
+ ;
+ if (!strncmp(startBuf, "if", strlen("if")) ||
+ !strncmp(startBuf, "ifdef", strlen("ifdef")) ||
+ !strncmp(startBuf, "ifndef", strlen("ifndef")) ||
+ !strncmp(startBuf, "define", strlen("define")) ||
+ !strncmp(startBuf, "undef", strlen("undef")) ||
+ !strncmp(startBuf, "else", strlen("else")) ||
+ !strncmp(startBuf, "elif", strlen("elif")) ||
+ !strncmp(startBuf, "endif", strlen("endif")) ||
+ !strncmp(startBuf, "pragma", strlen("pragma")) ||
+ !strncmp(startBuf, "include", strlen("include")) ||
+ !strncmp(startBuf, "import", strlen("import")) ||
+ !strncmp(startBuf, "include_next", strlen("include_next")))
+ return true;
+ }
+ startBuf++;
+ }
+ return false;
+}
+
+/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
+/// an objective-c class with ivars.
+void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
+ std::string &Result) {
+ assert(CDecl && "Class missing in SynthesizeObjCInternalStruct");
+ assert(CDecl->getName() != "" &&
+ "Name missing in SynthesizeObjCInternalStruct");
+ // Do not synthesize more than once.
+ if (ObjCSynthesizedStructs.count(CDecl))
+ return;
+ ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
+ int NumIvars = CDecl->ivar_size();
+ SourceLocation LocStart = CDecl->getLocStart();
+ SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+
+ // If no ivars and no root or if its root, directly or indirectly,
+ // have no ivars (thus not synthesized) then no need to synthesize this class.
+ if ((!CDecl->isThisDeclarationADefinition() || NumIvars == 0) &&
+ (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
+ endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
+ ReplaceText(LocStart, endBuf-startBuf, Result);
+ return;
+ }
+
+ // FIXME: This has potential of causing problem. If
+ // SynthesizeObjCInternalStruct is ever called recursively.
+ Result += "\nstruct ";
+ Result += CDecl->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+
+ if (NumIvars > 0) {
+ const char *cursor = strchr(startBuf, '{');
+ assert((cursor && endBuf)
+ && "SynthesizeObjCInternalStruct - malformed @interface");
+ // If the buffer contains preprocessor directives, we do more fine-grained
+ // rewrites. This is intended to fix code that looks like (which occurs in
+ // NSURL.h, for example):
+ //
+ // #ifdef XYZ
+ // @interface Foo : NSObject
+ // #else
+ // @interface FooBar : NSObject
+ // #endif
+ // {
+ // int i;
+ // }
+ // @end
+ //
+ // This clause is segregated to avoid breaking the common case.
+ if (BufferContainsPPDirectives(startBuf, cursor)) {
+ SourceLocation L = RCDecl ? CDecl->getSuperClassLoc() :
+ CDecl->getAtStartLoc();
+ const char *endHeader = SM->getCharacterData(L);
+ endHeader += Lexer::MeasureTokenLength(L, *SM, LangOpts);
+
+ if (CDecl->protocol_begin() != CDecl->protocol_end()) {
+ // advance to the end of the referenced protocols.
+ while (endHeader < cursor && *endHeader != '>') endHeader++;
+ endHeader++;
+ }
+ // rewrite the original header
+ ReplaceText(LocStart, endHeader-startBuf, Result);
+ } else {
+ // rewrite the original header *without* disturbing the '{'
+ ReplaceText(LocStart, cursor-startBuf, Result);
+ }
+ if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
+ Result = "\n struct ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IMPL ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IVARS;\n";
+
+ // insert the super class structure definition.
+ SourceLocation OnePastCurly =
+ LocStart.getLocWithOffset(cursor-startBuf+1);
+ InsertText(OnePastCurly, Result);
+ }
+ cursor++; // past '{'
+
+ // Now comment out any visibility specifiers.
+ while (cursor < endBuf) {
+ if (*cursor == '@') {
+ SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ // Skip whitespace.
+ for (++cursor; cursor[0] == ' ' || cursor[0] == '\t'; ++cursor)
+ /*scan*/;
+
+ // FIXME: presence of @public, etc. inside comment results in
+ // this transformation as well, which is still correct c-code.
+ if (!strncmp(cursor, "public", strlen("public")) ||
+ !strncmp(cursor, "private", strlen("private")) ||
+ !strncmp(cursor, "package", strlen("package")) ||
+ !strncmp(cursor, "protected", strlen("protected")))
+ InsertText(atLoc, "// ");
+ }
+ // FIXME: If there are cases where '<' is used in ivar declaration part
+ // of user code, then scan the ivar list and use needToScanForQualifiers
+ // for type checking.
+ else if (*cursor == '<') {
+ SourceLocation atLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ InsertText(atLoc, "/* ");
+ cursor = strchr(cursor, '>');
+ cursor++;
+ atLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ InsertText(atLoc, " */");
+ } else if (*cursor == '^') { // rewrite block specifier.
+ SourceLocation caretLoc = LocStart.getLocWithOffset(cursor-startBuf);
+ ReplaceText(caretLoc, 1, "*");
+ }
+ cursor++;
+ }
+ // Don't forget to add a ';'!!
+ InsertText(LocEnd.getLocWithOffset(1), ";");
+ } else { // we don't have any instance variables - insert super struct.
+ endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
+ Result += " {\n struct ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IMPL ";
+ Result += RCDecl->getNameAsString();
+ Result += "_IVARS;\n};\n";
+ ReplaceText(LocStart, endBuf-startBuf, Result);
+ }
+ // Mark this struct as having been generated.
+ if (!ObjCSynthesizedStructs.insert(CDecl))
+ llvm_unreachable("struct already synthesize- SynthesizeObjCInternalStruct");
+}
+
+//===----------------------------------------------------------------------===//
+// Meta Data Emission
+//===----------------------------------------------------------------------===//
+
+
+/// RewriteImplementations - This routine rewrites all method implementations
+/// and emits meta-data.
+
+void RewriteModernObjC::RewriteImplementations() {
+ int ClsDefCount = ClassImplementation.size();
+ int CatDefCount = CategoryImplementation.size();
+
+ // Rewrite implemented methods
+ for (int i = 0; i < ClsDefCount; i++)
+ RewriteImplementationDecl(ClassImplementation[i]);
+
+ for (int i = 0; i < CatDefCount; i++)
+ RewriteImplementationDecl(CategoryImplementation[i]);
+}
+
+void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
+ const std::string &Name,
+ ValueDecl *VD, bool def) {
+ assert(BlockByRefDeclNo.count(VD) &&
+ "RewriteByRefString: ByRef decl missing");
+ if (def)
+ ResultStr += "struct ";
+ ResultStr += "__Block_byref_" + Name +
+ "_" + utostr(BlockByRefDeclNo[VD]) ;
+}
+
+static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
+ if (VarDecl *Var = dyn_cast<VarDecl>(VD))
+ return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
+ return false;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
+ StringRef funcName,
+ std::string Tag) {
+ const FunctionType *AFT = CE->getFunctionType();
+ QualType RT = AFT->getResultType();
+ std::string StructRef = "struct " + Tag;
+ std::string S = "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
+ funcName.str() + "_" + "block_func_" + utostr(i);
+
+ BlockDecl *BD = CE->getBlockDecl();
+
+ if (isa<FunctionNoProtoType>(AFT)) {
+ // No user-supplied arguments. Still need to pass in a pointer to the
+ // block (to reference imported block decl refs).
+ S += "(" + StructRef + " *__cself)";
+ } 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();
+ QualType QT = (*AI)->getType();
+ if (convertBlockPointerToFunctionPointer(QT))
+ QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
+ else
+ QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
+ 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 (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string Name = (*I)->getNameAsString();
+ std::string TypeString;
+ RewriteByRefString(TypeString, Name, (*I));
+ TypeString += " *";
+ Name = TypeString + Name;
+ S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
+ }
+ // Next, emit a declaration for all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ S += " ";
+ // 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 (isTopLevelBlockPointerType((*I)->getType())) {
+ RewriteBlockPointerTypeVariable(S, (*I));
+ S += " = (";
+ RewriteBlockPointerType(S, (*I)->getType());
+ S += ")";
+ S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
+ }
+ else {
+ std::string Name = (*I)->getNameAsString();
+ QualType QT = (*I)->getType();
+ if (HasLocalVariableExternalStorage(*I))
+ QT = Context->getPointerType(QT);
+ QT.getAsStringInternal(Name, Context->getPrintingPolicy());
+ 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 RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
+ StringRef 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) {
+ ValueDecl *VD = (*I);
+ S += "_Block_object_assign((void*)&dst->";
+ S += (*I)->getNameAsString();
+ S += ", (void*)src->";
+ S += (*I)->getNameAsString();
+ if (BlockByRefDeclsPtrSet.count((*I)))
+ S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
+ else if (VD->getType()->isBlockPointerType())
+ S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
+ else
+ S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
+ }
+ S += "}\n";
+
+ 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) {
+ ValueDecl *VD = (*I);
+ S += "_Block_object_dispose((void*)src->";
+ S += (*I)->getNameAsString();
+ if (BlockByRefDeclsPtrSet.count((*I)))
+ S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
+ else if (VD->getType()->isBlockPointerType())
+ S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
+ else
+ S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
+ }
+ S += "}\n";
+ return S;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
+ std::string Desc) {
+ std::string S = "\nstruct " + Tag;
+ std::string Constructor = " " + Tag;
+
+ S += " {\n struct __block_impl impl;\n";
+ S += " struct " + Desc;
+ S += "* Desc;\n";
+
+ Constructor += "(void *fp, "; // Invoke function pointer.
+ Constructor += "struct " + Desc; // Descriptor pointer.
+ Constructor += " *desc";
+
+ if (BlockDeclRefs.size()) {
+ // Output all "by copy" declarations.
+ for (SmallVector<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 (isTopLevelBlockPointerType((*I)->getType())) {
+ S += "struct __block_impl *";
+ Constructor += ", void *" + ArgName;
+ } else {
+ QualType QT = (*I)->getType();
+ if (HasLocalVariableExternalStorage(*I))
+ QT = Context->getPointerType(QT);
+ QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
+ QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
+ Constructor += ", " + ArgName;
+ }
+ S += FieldName + ";\n";
+ }
+ // Output all "by ref" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ S += " ";
+ std::string FieldName = (*I)->getNameAsString();
+ std::string ArgName = "_" + FieldName;
+ {
+ std::string TypeString;
+ RewriteByRefString(TypeString, FieldName, (*I));
+ TypeString += " *";
+ FieldName = TypeString + FieldName;
+ ArgName = TypeString + ArgName;
+ Constructor += ", " + ArgName;
+ }
+ S += FieldName + "; // by ref\n";
+ }
+ // Finish writing the constructor.
+ Constructor += ", int flags=0)";
+ // Initialize all "by copy" arguments.
+ bool firsTime = true;
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ std::string Name = (*I)->getNameAsString();
+ if (firsTime) {
+ Constructor += " : ";
+ firsTime = false;
+ }
+ else
+ Constructor += ", ";
+ if (isTopLevelBlockPointerType((*I)->getType()))
+ Constructor += Name + "((struct __block_impl *)_" + Name + ")";
+ else
+ Constructor += Name + "(_" + Name + ")";
+ }
+ // Initialize all "by ref" arguments.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ std::string Name = (*I)->getNameAsString();
+ if (firsTime) {
+ Constructor += " : ";
+ firsTime = false;
+ }
+ else
+ Constructor += ", ";
+ Constructor += Name + "(_" + Name + "->__forwarding)";
+ }
+
+ Constructor += " {\n";
+ if (GlobalVarDecl)
+ Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
+ else
+ Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
+ Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
+
+ Constructor += " Desc = desc;\n";
+ } else {
+ // Finish writing the constructor.
+ Constructor += ", int flags=0) {\n";
+ if (GlobalVarDecl)
+ Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
+ else
+ Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
+ Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
+ Constructor += " Desc = desc;\n";
+ }
+ Constructor += " ";
+ Constructor += "}\n";
+ S += Constructor;
+ S += "};\n";
+ return S;
+}
+
+std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
+ std::string ImplTag, int i,
+ StringRef FunName,
+ unsigned hasCopy) {
+ std::string S = "\nstatic struct " + DescTag;
+
+ S += " {\n unsigned long reserved;\n";
+ S += " unsigned long Block_size;\n";
+ if (hasCopy) {
+ S += " void (*copy)(struct ";
+ S += ImplTag; S += "*, struct ";
+ S += ImplTag; S += "*);\n";
+
+ S += " void (*dispose)(struct ";
+ S += ImplTag; S += "*);\n";
+ }
+ S += "} ";
+
+ S += DescTag + "_DATA = { 0, sizeof(struct ";
+ S += ImplTag + ")";
+ if (hasCopy) {
+ S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
+ S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
+ }
+ S += "};\n";
+ return S;
+}
+
+void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
+ StringRef FunName) {
+ // Insert declaration for the function in which block literal is used.
+ if (CurFunctionDeclToDeclareForBlock && !Blocks.empty())
+ RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
+ bool RewriteSC = (GlobalVarDecl &&
+ !Blocks.empty() &&
+ GlobalVarDecl->getStorageClass() == SC_Static &&
+ GlobalVarDecl->getType().getCVRQualifiers());
+ if (RewriteSC) {
+ std::string SC(" void __");
+ SC += GlobalVarDecl->getNameAsString();
+ SC += "() {}";
+ InsertText(FunLocStart, SC);
+ }
+
+ // Insert closures that were part of the function.
+ for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
+ CollectBlockDeclRefInfo(Blocks[i]);
+ // Need to copy-in the inner copied-in variables not actually used in this
+ // block.
+ for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
+ BlockDeclRefExpr *Exp = InnerDeclRefs[count++];
+ ValueDecl *VD = Exp->getDecl();
+ BlockDeclRefs.push_back(Exp);
+ if (!Exp->isByRef() && !BlockByCopyDeclsPtrSet.count(VD)) {
+ BlockByCopyDeclsPtrSet.insert(VD);
+ BlockByCopyDecls.push_back(VD);
+ }
+ if (Exp->isByRef() && !BlockByRefDeclsPtrSet.count(VD)) {
+ BlockByRefDeclsPtrSet.insert(VD);
+ BlockByRefDecls.push_back(VD);
+ }
+ // imported objects in the inner blocks not used in the outer
+ // blocks must be copied/disposed in the outer block as well.
+ if (Exp->isByRef() ||
+ VD->getType()->isObjCObjectPointerType() ||
+ VD->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(VD);
+ }
+
+ std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
+ std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
+
+ std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
+
+ InsertText(FunLocStart, CI);
+
+ std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
+
+ InsertText(FunLocStart, CF);
+
+ if (ImportedBlockDecls.size()) {
+ std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
+ InsertText(FunLocStart, HF);
+ }
+ std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
+ ImportedBlockDecls.size() > 0);
+ InsertText(FunLocStart, BD);
+
+ BlockDeclRefs.clear();
+ BlockByRefDecls.clear();
+ BlockByRefDeclsPtrSet.clear();
+ BlockByCopyDecls.clear();
+ BlockByCopyDeclsPtrSet.clear();
+ ImportedBlockDecls.clear();
+ }
+ if (RewriteSC) {
+ // Must insert any 'const/volatile/static here. Since it has been
+ // removed as result of rewriting of block literals.
+ std::string SC;
+ if (GlobalVarDecl->getStorageClass() == SC_Static)
+ SC = "static ";
+ if (GlobalVarDecl->getType().isConstQualified())
+ SC += "const ";
+ if (GlobalVarDecl->getType().isVolatileQualified())
+ SC += "volatile ";
+ if (GlobalVarDecl->getType().isRestrictQualified())
+ SC += "restrict ";
+ InsertText(FunLocStart, SC);
+ }
+
+ Blocks.clear();
+ InnerDeclRefsCount.clear();
+ InnerDeclRefs.clear();
+ RewrittenBlockExprs.clear();
+}
+
+void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
+ SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
+ StringRef FuncName = FD->getName();
+
+ SynthesizeBlockLiterals(FunLocStart, FuncName);
+}
+
+static void BuildUniqueMethodName(std::string &Name,
+ ObjCMethodDecl *MD) {
+ ObjCInterfaceDecl *IFace = MD->getClassInterface();
+ Name = IFace->getName();
+ Name += "__" + MD->getSelector().getAsString();
+ // Convert colons to underscores.
+ std::string::size_type loc = 0;
+ while ((loc = Name.find(":", loc)) != std::string::npos)
+ Name.replace(loc, 1, "_");
+}
+
+void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
+ //fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
+ //SourceLocation FunLocStart = MD->getLocStart();
+ SourceLocation FunLocStart = MD->getLocStart();
+ std::string FuncName;
+ BuildUniqueMethodName(FuncName, MD);
+ SynthesizeBlockLiterals(FunLocStart, FuncName);
+}
+
+void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
+ for (Stmt::child_range CI = S->children(); CI; ++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);
+ }
+ else if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
+ if (HasLocalVariableExternalStorage(DRE->getDecl())) {
+ BlockDeclRefExpr *BDRE =
+ new (Context)BlockDeclRefExpr(cast<VarDecl>(DRE->getDecl()),
+ DRE->getType(),
+ VK_LValue, DRE->getLocation(), false);
+ BlockDeclRefs.push_back(BDRE);
+ }
+
+ return;
+}
+
+void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
+ SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs,
+ llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
+ InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
+ GetInnerBlockDeclRefExprs(CBE->getBody(),
+ InnerBlockDeclRefs,
+ InnerContexts);
+ }
+ else
+ GetInnerBlockDeclRefExprs(*CI,
+ InnerBlockDeclRefs,
+ InnerContexts);
+
+ }
+ // Handle specific things.
+ if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(S)) {
+ if (!isa<FunctionDecl>(CDRE->getDecl()) &&
+ !InnerContexts.count(CDRE->getDecl()->getDeclContext()))
+ InnerBlockDeclRefs.push_back(CDRE);
+ }
+ else if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
+ if (Var->isFunctionOrMethodVarDecl())
+ ImportedLocalExternalDecls.insert(Var);
+ }
+
+ return;
+}
+
+/// convertFunctionTypeOfBlocks - This routine converts a function type
+/// whose result type may be a block pointer or whose argument type(s)
+/// might be block pointers to an equivalent function type replacing
+/// all block pointers to function pointers.
+QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
+ const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
+ // FTP will be null for closures that don't take arguments.
+ // Generate a funky cast.
+ SmallVector<QualType, 8> ArgTypes;
+ QualType Res = FT->getResultType();
+ bool HasBlockType = convertBlockPointerToFunctionPointer(Res);
+
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I && (I != E); ++I) {
+ QualType t = *I;
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (convertBlockPointerToFunctionPointer(t))
+ HasBlockType = true;
+ ArgTypes.push_back(t);
+ }
+ }
+ QualType FuncType;
+ // FIXME. Does this work if block takes no argument but has a return type
+ // which is of block type?
+ if (HasBlockType)
+ FuncType = getSimpleFunctionType(Res, &ArgTypes[0], ArgTypes.size());
+ else FuncType = QualType(FT, 0);
+ return FuncType;
+}
+
+Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
+ // Navigate to relevant type information.
+ const BlockPointerType *CPT = 0;
+
+ if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
+ CPT = DRE->getType()->getAs<BlockPointerType>();
+ } else if (const BlockDeclRefExpr *CDRE =
+ dyn_cast<BlockDeclRefExpr>(BlockExp)) {
+ CPT = CDRE->getType()->getAs<BlockPointerType>();
+ } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
+ CPT = MExpr->getType()->getAs<BlockPointerType>();
+ }
+ else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
+ return SynthesizeBlockCall(Exp, PRE->getSubExpr());
+ }
+ else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
+ CPT = IEXPR->getType()->getAs<BlockPointerType>();
+ else if (const ConditionalOperator *CEXPR =
+ dyn_cast<ConditionalOperator>(BlockExp)) {
+ Expr *LHSExp = CEXPR->getLHS();
+ Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
+ Expr *RHSExp = CEXPR->getRHS();
+ Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
+ Expr *CONDExp = CEXPR->getCond();
+ ConditionalOperator *CondExpr =
+ new (Context) ConditionalOperator(CONDExp,
+ SourceLocation(), cast<Expr>(LHSStmt),
+ SourceLocation(), cast<Expr>(RHSStmt),
+ Exp->getType(), VK_RValue, OK_Ordinary);
+ return CondExpr;
+ } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
+ CPT = IRE->getType()->getAs<BlockPointerType>();
+ } else if (const PseudoObjectExpr *POE
+ = dyn_cast<PseudoObjectExpr>(BlockExp)) {
+ CPT = POE->getType()->castAs<BlockPointerType>();
+ } else {
+ assert(1 && "RewriteBlockClass: Bad type");
+ }
+ assert(CPT && "RewriteBlockClass: Bad type");
+ const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
+ assert(FT && "RewriteBlockClass: Bad type");
+ const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
+ // FTP will be null for closures that don't take arguments.
+
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get("__block_impl"));
+ QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
+
+ // Generate a funky cast.
+ SmallVector<QualType, 8> ArgTypes;
+
+ // Push the block argument type.
+ ArgTypes.push_back(PtrBlock);
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I && (I != E); ++I) {
+ QualType t = *I;
+ // Make sure we convert "t (^)(...)" to "t (*)(...)".
+ if (!convertBlockPointerToFunctionPointer(t))
+ convertToUnqualifiedObjCType(t);
+ ArgTypes.push_back(t);
+ }
+ }
+ // Now do the pointer to function cast.
+ QualType PtrToFuncCastType
+ = getSimpleFunctionType(Exp->getType(), &ArgTypes[0], ArgTypes.size());
+
+ PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
+
+ CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
+ CK_BitCast,
+ const_cast<Expr*>(BlockExp));
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ BlkCast);
+ //PE->dump();
+
+ FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("FuncPtr"),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ME = new (Context) MemberExpr(PE, true, FD, SourceLocation(),
+ FD->getType(), VK_LValue,
+ OK_Ordinary);
+
+
+ CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
+ CK_BitCast, ME);
+ PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
+
+ SmallVector<Expr*, 8> BlkExprs;
+ // Add the implicit argument.
+ BlkExprs.push_back(BlkCast);
+ // Add the user arguments.
+ for (CallExpr::arg_iterator I = Exp->arg_begin(),
+ E = Exp->arg_end(); I != E; ++I) {
+ BlkExprs.push_back(*I);
+ }
+ CallExpr *CE = new (Context) CallExpr(*Context, PE, &BlkExprs[0],
+ BlkExprs.size(),
+ Exp->getType(), VK_RValue,
+ SourceLocation());
+ return CE;
+}
+
+// We need to return the rewritten expression to handle cases where the
+// BlockDeclRefExpr is embedded in another expression being rewritten.
+// For example:
+//
+// int main() {
+// __block Foo *f;
+// __block int i;
+//
+// void (^myblock)() = ^() {
+// [f test]; // f is a BlockDeclRefExpr embedded in a message (which is being rewritten).
+// i = 77;
+// };
+//}
+Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(Expr *DeclRefExp) {
+ // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
+ // for each DeclRefExp where BYREFVAR is name of the variable.
+ ValueDecl *VD;
+ bool isArrow = true;
+ if (BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(DeclRefExp))
+ VD = BDRE->getDecl();
+ else {
+ VD = cast<DeclRefExpr>(DeclRefExp)->getDecl();
+ isArrow = false;
+ }
+
+ FieldDecl *FD = FieldDecl::Create(*Context, 0, SourceLocation(),
+ SourceLocation(),
+ &Context->Idents.get("__forwarding"),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ MemberExpr *ME = new (Context) MemberExpr(DeclRefExp, isArrow,
+ FD, SourceLocation(),
+ FD->getType(), VK_LValue,
+ OK_Ordinary);
+
+ StringRef Name = VD->getName();
+ FD = FieldDecl::Create(*Context, 0, SourceLocation(), SourceLocation(),
+ &Context->Idents.get(Name),
+ Context->VoidPtrTy, 0,
+ /*BitWidth=*/0, /*Mutable=*/true,
+ /*HasInit=*/false);
+ ME = new (Context) MemberExpr(ME, true, FD, SourceLocation(),
+ DeclRefExp->getType(), VK_LValue, OK_Ordinary);
+
+
+
+ // Need parens to enforce precedence.
+ ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
+ DeclRefExp->getExprLoc(),
+ ME);
+ ReplaceStmt(DeclRefExp, PE);
+ return PE;
+}
+
+// Rewrites the imported local variable V with external storage
+// (static, extern, etc.) as *V
+//
+Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
+ ValueDecl *VD = DRE->getDecl();
+ if (VarDecl *Var = dyn_cast<VarDecl>(VD))
+ if (!ImportedLocalExternalDecls.count(Var))
+ return DRE;
+ Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
+ VK_LValue, OK_Ordinary,
+ DRE->getLocation());
+ // Need parens to enforce precedence.
+ ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+ Exp);
+ ReplaceStmt(DRE, PE);
+ return PE;
+}
+
+void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
+ SourceLocation LocStart = CE->getLParenLoc();
+ SourceLocation LocEnd = CE->getRParenLoc();
+
+ // Need to avoid trying to rewrite synthesized casts.
+ if (LocStart.isInvalid())
+ return;
+ // Need to avoid trying to rewrite casts contained in macros.
+ if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
+ return;
+
+ const char *startBuf = SM->getCharacterData(LocStart);
+ const char *endBuf = SM->getCharacterData(LocEnd);
+ QualType QT = CE->getType();
+ const Type* TypePtr = QT->getAs<Type>();
+ if (isa<TypeOfExprType>(TypePtr)) {
+ const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
+ QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
+ std::string TypeAsString = "(";
+ RewriteBlockPointerType(TypeAsString, QT);
+ TypeAsString += ")";
+ ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
+ return;
+ }
+ // advance the location to startArgList.
+ const char *argPtr = startBuf;
+
+ while (*argPtr++ && (argPtr < endBuf)) {
+ switch (*argPtr) {
+ case '^':
+ // Replace the '^' with '*'.
+ LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
+ ReplaceText(LocStart, 1, "*");
+ break;
+ }
+ }
+ return;
+}
+
+void RewriteModernObjC::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.getLocWithOffset(startArgList-startBuf);
+ assert((DeclLoc.isValid()) && "Invalid DeclLoc");
+
+ const char *argPtr = startArgList;
+
+ while (*argPtr++ && parenCount) {
+ switch (*argPtr) {
+ case '^':
+ // Replace the '^' with '*'.
+ DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
+ ReplaceText(DeclLoc, 1, "*");
+ break;
+ case '(':
+ parenCount++;
+ break;
+ case ')':
+ parenCount--;
+ break;
+ }
+ }
+ return;
+}
+
+bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
+ const FunctionProtoType *FTP;
+ const PointerType *PT = QT->getAs<PointerType>();
+ if (PT) {
+ FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
+ } else {
+ const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
+ assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
+ FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
+ }
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I != E; ++I)
+ if (isTopLevelBlockPointerType(*I))
+ return true;
+ }
+ return false;
+}
+
+bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
+ const FunctionProtoType *FTP;
+ const PointerType *PT = QT->getAs<PointerType>();
+ if (PT) {
+ FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
+ } else {
+ const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
+ assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
+ FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
+ }
+ if (FTP) {
+ for (FunctionProtoType::arg_type_iterator I = FTP->arg_type_begin(),
+ E = FTP->arg_type_end(); I != E; ++I) {
+ if ((*I)->isObjCQualifiedIdType())
+ return true;
+ if ((*I)->isObjCObjectPointerType() &&
+ (*I)->getPointeeType()->isObjCQualifiedInterfaceType())
+ return true;
+ }
+
+ }
+ return false;
+}
+
+void RewriteModernObjC::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 RewriteModernObjC::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 (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
+ DeclT = TDD->getUnderlyingType();
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
+ DeclT = FD->getType();
+ else
+ llvm_unreachable("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--;
+ SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
+ std::string buf;
+ unsigned OrigLength=0;
+ // *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.
+ buf = '*';
+ startBuf++;
+ OrigLength++;
+ }
+ while (*startBuf != ')') {
+ buf += *startBuf;
+ startBuf++;
+ OrigLength++;
+ }
+ buf += ')';
+ OrigLength++;
+
+ if (PointerTypeTakesAnyBlockArguments(DeclT) ||
+ PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
+ // Replace the '^' with '*' for arguments.
+ // Replace id<P> with id/*<>*/
+ DeclLoc = ND->getLocation();
+ startBuf = SM->getCharacterData(DeclLoc);
+ const char *argListBegin, *argListEnd;
+ GetExtentOfArgList(startBuf, argListBegin, argListEnd);
+ while (argListBegin < argListEnd) {
+ if (*argListBegin == '^')
+ buf += '*';
+ else if (*argListBegin == '<') {
+ buf += "/*";
+ buf += *argListBegin++;
+ OrigLength++;;
+ while (*argListBegin != '>') {
+ buf += *argListBegin++;
+ OrigLength++;
+ }
+ buf += *argListBegin;
+ buf += "*/";
+ }
+ else
+ buf += *argListBegin;
+ argListBegin++;
+ OrigLength++;
+ }
+ buf += ')';
+ OrigLength++;
+ }
+ ReplaceText(Start, OrigLength, buf);
+
+ return;
+}
+
+
+/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
+/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
+/// struct Block_byref_id_object *src) {
+/// _Block_object_assign (&_dest->object, _src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
+/// [|BLOCK_FIELD_IS_WEAK]) // object
+/// _Block_object_assign(&_dest->object, _src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
+/// [|BLOCK_FIELD_IS_WEAK]) // block
+/// }
+/// And:
+/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
+/// _Block_object_dispose(_src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
+/// [|BLOCK_FIELD_IS_WEAK]) // object
+/// _Block_object_dispose(_src->object,
+/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
+/// [|BLOCK_FIELD_IS_WEAK]) // block
+/// }
+
+std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
+ int flag) {
+ std::string S;
+ if (CopyDestroyCache.count(flag))
+ return S;
+ CopyDestroyCache.insert(flag);
+ S = "static void __Block_byref_id_object_copy_";
+ S += utostr(flag);
+ S += "(void *dst, void *src) {\n";
+
+ // offset into the object pointer is computed as:
+ // void * + void* + int + int + void* + void *
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ unsigned VoidPtrSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
+
+ unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
+ S += " _Block_object_assign((char*)dst + ";
+ S += utostr(offset);
+ S += ", *(void * *) ((char*)src + ";
+ S += utostr(offset);
+ S += "), ";
+ S += utostr(flag);
+ S += ");\n}\n";
+
+ S += "static void __Block_byref_id_object_dispose_";
+ S += utostr(flag);
+ S += "(void *src) {\n";
+ S += " _Block_object_dispose(*(void * *) ((char*)src + ";
+ S += utostr(offset);
+ S += "), ";
+ S += utostr(flag);
+ S += ");\n}\n";
+ return S;
+}
+
+/// RewriteByRefVar - For each __block typex ND variable this routine transforms
+/// the declaration into:
+/// struct __Block_byref_ND {
+/// void *__isa; // NULL for everything except __weak pointers
+/// struct __Block_byref_ND *__forwarding;
+/// int32_t __flags;
+/// int32_t __size;
+/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
+/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
+/// typex ND;
+/// };
+///
+/// It then replaces declaration of ND variable with:
+/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
+/// __size=sizeof(struct __Block_byref_ND),
+/// ND=initializer-if-any};
+///
+///
+void RewriteModernObjC::RewriteByRefVar(VarDecl *ND) {
+ // Insert declaration for the function in which block literal is
+ // used.
+ if (CurFunctionDeclToDeclareForBlock)
+ RewriteBlockLiteralFunctionDecl(CurFunctionDeclToDeclareForBlock);
+ int flag = 0;
+ int isa = 0;
+ SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
+ if (DeclLoc.isInvalid())
+ // If type location is missing, it is because of missing type (a warning).
+ // Use variable's location which is good for this case.
+ DeclLoc = ND->getLocation();
+ const char *startBuf = SM->getCharacterData(DeclLoc);
+ SourceLocation X = ND->getLocEnd();
+ X = SM->getExpansionLoc(X);
+ const char *endBuf = SM->getCharacterData(X);
+ std::string Name(ND->getNameAsString());
+ std::string ByrefType;
+ RewriteByRefString(ByrefType, Name, ND, true);
+ ByrefType += " {\n";
+ ByrefType += " void *__isa;\n";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += " *__forwarding;\n";
+ ByrefType += " int __flags;\n";
+ ByrefType += " int __size;\n";
+ // Add void *__Block_byref_id_object_copy;
+ // void *__Block_byref_id_object_dispose; if needed.
+ QualType Ty = ND->getType();
+ bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty);
+ if (HasCopyAndDispose) {
+ ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
+ ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
+ }
+
+ QualType T = Ty;
+ (void)convertBlockPointerToFunctionPointer(T);
+ T.getAsStringInternal(Name, Context->getPrintingPolicy());
+
+ ByrefType += " " + Name + ";\n";
+ ByrefType += "};\n";
+ // Insert this type in global scope. It is needed by helper function.
+ SourceLocation FunLocStart;
+ if (CurFunctionDef)
+ FunLocStart = CurFunctionDef->getTypeSpecStartLoc();
+ else {
+ assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null");
+ FunLocStart = CurMethodDef->getLocStart();
+ }
+ InsertText(FunLocStart, ByrefType);
+ if (Ty.isObjCGCWeak()) {
+ flag |= BLOCK_FIELD_IS_WEAK;
+ isa = 1;
+ }
+
+ if (HasCopyAndDispose) {
+ flag = BLOCK_BYREF_CALLER;
+ QualType Ty = ND->getType();
+ // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
+ if (Ty->isBlockPointerType())
+ flag |= BLOCK_FIELD_IS_BLOCK;
+ else
+ flag |= BLOCK_FIELD_IS_OBJECT;
+ std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
+ if (!HF.empty())
+ InsertText(FunLocStart, HF);
+ }
+
+ // struct __Block_byref_ND ND =
+ // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
+ // initializer-if-any};
+ bool hasInit = (ND->getInit() != 0);
+ unsigned flags = 0;
+ if (HasCopyAndDispose)
+ flags |= BLOCK_HAS_COPY_DISPOSE;
+ Name = ND->getNameAsString();
+ ByrefType.clear();
+ RewriteByRefString(ByrefType, Name, ND);
+ std::string ForwardingCastType("(");
+ ForwardingCastType += ByrefType + " *)";
+ if (!hasInit) {
+ ByrefType += " " + Name + " = {(void*)";
+ ByrefType += utostr(isa);
+ ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
+ ByrefType += utostr(flags);
+ ByrefType += ", ";
+ ByrefType += "sizeof(";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += ")";
+ if (HasCopyAndDispose) {
+ ByrefType += ", __Block_byref_id_object_copy_";
+ ByrefType += utostr(flag);
+ ByrefType += ", __Block_byref_id_object_dispose_";
+ ByrefType += utostr(flag);
+ }
+ ByrefType += "};\n";
+ unsigned nameSize = Name.size();
+ // for block or function pointer declaration. Name is aleady
+ // part of the declaration.
+ if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
+ nameSize = 1;
+ ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
+ }
+ else {
+ SourceLocation startLoc;
+ Expr *E = ND->getInit();
+ if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
+ startLoc = ECE->getLParenLoc();
+ else
+ startLoc = E->getLocStart();
+ startLoc = SM->getExpansionLoc(startLoc);
+ endBuf = SM->getCharacterData(startLoc);
+ ByrefType += " " + Name;
+ ByrefType += " = {(void*)";
+ ByrefType += utostr(isa);
+ ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
+ ByrefType += utostr(flags);
+ ByrefType += ", ";
+ ByrefType += "sizeof(";
+ RewriteByRefString(ByrefType, Name, ND);
+ ByrefType += "), ";
+ if (HasCopyAndDispose) {
+ ByrefType += "__Block_byref_id_object_copy_";
+ ByrefType += utostr(flag);
+ ByrefType += ", __Block_byref_id_object_dispose_";
+ ByrefType += utostr(flag);
+ ByrefType += ", ";
+ }
+ ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
+
+ // Complete the newly synthesized compound expression by inserting a right
+ // curly brace before the end of the declaration.
+ // FIXME: This approach avoids rewriting the initializer expression. It
+ // also assumes there is only one declarator. For example, the following
+ // isn't currently supported by this routine (in general):
+ //
+ // double __block BYREFVAR = 1.34, BYREFVAR2 = 1.37;
+ //
+ const char *startInitializerBuf = SM->getCharacterData(startLoc);
+ const char *semiBuf = strchr(startInitializerBuf, ';');
+ assert((*semiBuf == ';') && "RewriteByRefVar: can't find ';'");
+ SourceLocation semiLoc =
+ startLoc.getLocWithOffset(semiBuf-startInitializerBuf);
+
+ InsertText(semiLoc, "}");
+ }
+ return;
+}
+
+void RewriteModernObjC::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()) {
+ if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
+ BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
+ BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
+ }
+ }
+ // Unique all "by ref" declarations.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (BlockDeclRefs[i]->isByRef()) {
+ if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
+ BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
+ BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
+ }
+ }
+ // Find any imported blocks...they will need special attention.
+ for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
+ if (BlockDeclRefs[i]->isByRef() ||
+ BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
+ BlockDeclRefs[i]->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
+ }
+}
+
+FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
+ IdentifierInfo *ID = &Context->Idents.get(name);
+ QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
+ return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
+ SourceLocation(), ID, FType, 0, SC_Extern,
+ SC_None, false, false);
+}
+
+Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
+ const SmallVector<BlockDeclRefExpr *, 8> &InnerBlockDeclRefs) {
+ const BlockDecl *block = Exp->getBlockDecl();
+ Blocks.push_back(Exp);
+
+ CollectBlockDeclRefInfo(Exp);
+
+ // Add inner imported variables now used in current block.
+ int countOfInnerDecls = 0;
+ if (!InnerBlockDeclRefs.empty()) {
+ for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
+ BlockDeclRefExpr *Exp = InnerBlockDeclRefs[i];
+ ValueDecl *VD = Exp->getDecl();
+ if (!Exp->isByRef() && !BlockByCopyDeclsPtrSet.count(VD)) {
+ // We need to save the copied-in variables in nested
+ // blocks because it is needed at the end for some of the API generations.
+ // See SynthesizeBlockLiterals routine.
+ InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
+ BlockDeclRefs.push_back(Exp);
+ BlockByCopyDeclsPtrSet.insert(VD);
+ BlockByCopyDecls.push_back(VD);
+ }
+ if (Exp->isByRef() && !BlockByRefDeclsPtrSet.count(VD)) {
+ InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
+ BlockDeclRefs.push_back(Exp);
+ BlockByRefDeclsPtrSet.insert(VD);
+ BlockByRefDecls.push_back(VD);
+ }
+ }
+ // Find any imported blocks...they will need special attention.
+ for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
+ if (InnerBlockDeclRefs[i]->isByRef() ||
+ InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
+ InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
+ ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
+ }
+ InnerDeclRefsCount.push_back(countOfInnerDecls);
+
+ std::string FuncName;
+
+ if (CurFunctionDef)
+ FuncName = CurFunctionDef->getNameAsString();
+ else if (CurMethodDef)
+ BuildUniqueMethodName(FuncName, CurMethodDef);
+ else if (GlobalVarDecl)
+ FuncName = std::string(GlobalVarDecl->getNameAsString());
+
+ std::string BlockNumber = utostr(Blocks.size()-1);
+
+ std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber;
+ std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
+
+ // Get a pointer to the function type so we can cast appropriately.
+ QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
+ QualType FType = Context->getPointerType(BFT);
+
+ FunctionDecl *FD;
+ Expr *NewRep;
+
+ // Simulate a contructor call...
+ FD = SynthBlockInitFunctionDecl(Tag);
+ DeclRefExpr *DRE = new (Context) DeclRefExpr(FD, FType, VK_RValue,
+ SourceLocation());
+
+ SmallVector<Expr*, 4> InitExprs;
+
+ // Initialize the block function.
+ FD = SynthBlockInitFunctionDecl(Func);
+ DeclRefExpr *Arg = new (Context) DeclRefExpr(FD, FD->getType(), VK_LValue,
+ SourceLocation());
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
+ CK_BitCast, Arg);
+ InitExprs.push_back(castExpr);
+
+ // Initialize the block descriptor.
+ std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
+
+ VarDecl *NewVD = VarDecl::Create(*Context, TUDecl,
+ SourceLocation(), SourceLocation(),
+ &Context->Idents.get(DescData.c_str()),
+ Context->VoidPtrTy, 0,
+ SC_Static, SC_None);
+ UnaryOperator *DescRefExpr =
+ new (Context) UnaryOperator(new (Context) DeclRefExpr(NewVD,
+ Context->VoidPtrTy,
+ VK_LValue,
+ SourceLocation()),
+ UO_AddrOf,
+ Context->getPointerType(Context->VoidPtrTy),
+ VK_RValue, OK_Ordinary,
+ SourceLocation());
+ InitExprs.push_back(DescRefExpr);
+
+ // Add initializers for any closure decl refs.
+ if (BlockDeclRefs.size()) {
+ Expr *Exp;
+ // Output all "by copy" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
+ E = BlockByCopyDecls.end(); I != E; ++I) {
+ if (isObjCType((*I)->getType())) {
+ // FIXME: Conform to ABI ([[obj retain] autorelease]).
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, FD->getType(), VK_LValue,
+ SourceLocation());
+ if (HasLocalVariableExternalStorage(*I)) {
+ QualType QT = (*I)->getType();
+ QT = Context->getPointerType(QT);
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
+ OK_Ordinary, SourceLocation());
+ }
+ } else if (isTopLevelBlockPointerType((*I)->getType())) {
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Arg = new (Context) DeclRefExpr(FD, FD->getType(), VK_LValue,
+ SourceLocation());
+ Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
+ CK_BitCast, Arg);
+ } else {
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, FD->getType(), VK_LValue,
+ SourceLocation());
+ if (HasLocalVariableExternalStorage(*I)) {
+ QualType QT = (*I)->getType();
+ QT = Context->getPointerType(QT);
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
+ OK_Ordinary, SourceLocation());
+ }
+
+ }
+ InitExprs.push_back(Exp);
+ }
+ // Output all "by ref" declarations.
+ for (SmallVector<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
+ E = BlockByRefDecls.end(); I != E; ++I) {
+ ValueDecl *ND = (*I);
+ std::string Name(ND->getNameAsString());
+ std::string RecName;
+ RewriteByRefString(RecName, Name, ND, true);
+ IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
+ + sizeof("struct"));
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+
+ FD = SynthBlockInitFunctionDecl((*I)->getName());
+ Exp = new (Context) DeclRefExpr(FD, FD->getType(), VK_LValue,
+ SourceLocation());
+ bool isNestedCapturedVar = false;
+ if (block)
+ for (BlockDecl::capture_const_iterator ci = block->capture_begin(),
+ ce = block->capture_end(); ci != ce; ++ci) {
+ const VarDecl *variable = ci->getVariable();
+ if (variable == ND && ci->isNested()) {
+ assert (ci->isByRef() &&
+ "SynthBlockInitExpr - captured block variable is not byref");
+ isNestedCapturedVar = true;
+ break;
+ }
+ }
+ // captured nested byref variable has its address passed. Do not take
+ // its address again.
+ if (!isNestedCapturedVar)
+ Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
+ Context->getPointerType(Exp->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
+ InitExprs.push_back(Exp);
+ }
+ }
+ if (ImportedBlockDecls.size()) {
+ // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
+ int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
+ unsigned IntSize =
+ static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
+ Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
+ Context->IntTy, SourceLocation());
+ InitExprs.push_back(FlagExp);
+ }
+ NewRep = new (Context) CallExpr(*Context, DRE, &InitExprs[0], InitExprs.size(),
+ FType, VK_LValue, SourceLocation());
+ NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
+ Context->getPointerType(NewRep->getType()),
+ VK_RValue, OK_Ordinary, SourceLocation());
+ NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
+ NewRep);
+ BlockDeclRefs.clear();
+ BlockByRefDecls.clear();
+ BlockByRefDeclsPtrSet.clear();
+ BlockByCopyDecls.clear();
+ BlockByCopyDeclsPtrSet.clear();
+ ImportedBlockDecls.clear();
+ return NewRep;
+}
+
+bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
+ if (const ObjCForCollectionStmt * CS =
+ dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
+ return CS->getElement() == DS;
+ return false;
+}
+
+//===----------------------------------------------------------------------===//
+// Function Body / Expression rewriting
+//===----------------------------------------------------------------------===//
+
+Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
+ if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
+ isa<DoStmt>(S) || isa<ForStmt>(S))
+ Stmts.push_back(S);
+ else if (isa<ObjCForCollectionStmt>(S)) {
+ Stmts.push_back(S);
+ ObjCBcLabelNo.push_back(++BcLabelCount);
+ }
+
+ // Pseudo-object operations and ivar references need special
+ // treatment because we're going to recursively rewrite them.
+ if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
+ if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
+ return RewritePropertyOrImplicitSetter(PseudoOp);
+ } else {
+ return RewritePropertyOrImplicitGetter(PseudoOp);
+ }
+ } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
+ return RewriteObjCIvarRefExpr(IvarRefExpr);
+ }
+
+ SourceRange OrigStmtRange = S->getSourceRange();
+
+ // Perform a bottom up rewrite of all children.
+ for (Stmt::child_range CI = S->children(); CI; ++CI)
+ if (*CI) {
+ Stmt *childStmt = (*CI);
+ Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
+ if (newStmt) {
+ *CI = newStmt;
+ }
+ }
+
+ if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
+ SmallVector<BlockDeclRefExpr *, 8> InnerBlockDeclRefs;
+ llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
+ InnerContexts.insert(BE->getBlockDecl());
+ ImportedLocalExternalDecls.clear();
+ GetInnerBlockDeclRefExprs(BE->getBody(),
+ InnerBlockDeclRefs, InnerContexts);
+ // Rewrite the block body in place.
+ Stmt *SaveCurrentBody = CurrentBody;
+ CurrentBody = BE->getBody();
+ PropParentMap = 0;
+ // block literal on rhs of a property-dot-sytax assignment
+ // must be replaced by its synthesize ast so getRewrittenText
+ // works as expected. In this case, what actually ends up on RHS
+ // is the blockTranscribed which is the helper function for the
+ // block literal; as in: self.c = ^() {[ace ARR];};
+ bool saveDisableReplaceStmt = DisableReplaceStmt;
+ DisableReplaceStmt = false;
+ RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
+ DisableReplaceStmt = saveDisableReplaceStmt;
+ CurrentBody = SaveCurrentBody;
+ PropParentMap = 0;
+ ImportedLocalExternalDecls.clear();
+ // Now we snarf the rewritten text and stash it away for later use.
+ std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
+ RewrittenBlockExprs[BE] = Str;
+
+ Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
+
+ //blockTranscribed->dump();
+ ReplaceStmt(S, blockTranscribed);
+ return blockTranscribed;
+ }
+ // Handle specific things.
+ if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
+ return RewriteAtEncode(AtEncode);
+
+ if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
+ return RewriteAtSelector(AtSelector);
+
+ if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
+ return RewriteObjCStringLiteral(AtString);
+
+ if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
+#if 0
+ // Before we rewrite it, put the original message expression in a comment.
+ SourceLocation startLoc = MessExpr->getLocStart();
+ SourceLocation endLoc = MessExpr->getLocEnd();
+
+ const char *startBuf = SM->getCharacterData(startLoc);
+ const char *endBuf = SM->getCharacterData(endLoc);
+
+ std::string messString;
+ messString += "// ";
+ messString.append(startBuf, endBuf-startBuf+1);
+ messString += "\n";
+
+ // FIXME: Missing definition of
+ // InsertText(clang::SourceLocation, char const*, unsigned int).
+ // InsertText(startLoc, messString.c_str(), messString.size());
+ // Tried this, but it didn't work either...
+ // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
+#endif
+ return RewriteMessageExpr(MessExpr);
+ }
+
+ if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
+ return RewriteObjCTryStmt(StmtTry);
+
+ if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
+ return RewriteObjCSynchronizedStmt(StmtTry);
+
+ if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
+ return RewriteObjCThrowStmt(StmtThrow);
+
+ if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
+ return RewriteObjCProtocolExpr(ProtocolExp);
+
+ if (ObjCForCollectionStmt *StmtForCollection =
+ dyn_cast<ObjCForCollectionStmt>(S))
+ return RewriteObjCForCollectionStmt(StmtForCollection,
+ OrigStmtRange.getEnd());
+ if (BreakStmt *StmtBreakStmt =
+ dyn_cast<BreakStmt>(S))
+ return RewriteBreakStmt(StmtBreakStmt);
+ if (ContinueStmt *StmtContinueStmt =
+ dyn_cast<ContinueStmt>(S))
+ return RewriteContinueStmt(StmtContinueStmt);
+
+ // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
+ // and cast exprs.
+ if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
+ // FIXME: What we're doing here is modifying the type-specifier that
+ // precedes the first Decl. In the future the DeclGroup should have
+ // a separate type-specifier that we can rewrite.
+ // NOTE: We need to avoid rewriting the DeclStmt if it is within
+ // the context of an ObjCForCollectionStmt. For example:
+ // NSArray *someArray;
+ // for (id <FooProtocol> index in someArray) ;
+ // This is because RewriteObjCForCollectionStmt() does textual rewriting
+ // and it depends on the original text locations/positions.
+ if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
+ RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
+
+ // Blocks rewrite rules.
+ 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 (isTopLevelBlockPointerType(ND->getType()))
+ RewriteBlockPointerDecl(ND);
+ else if (ND->getType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(ND->getType(), ND);
+ if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
+ if (VD->hasAttr<BlocksAttr>()) {
+ static unsigned uniqueByrefDeclCount = 0;
+ assert(!BlockByRefDeclNo.count(ND) &&
+ "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl");
+ BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
+ RewriteByRefVar(VD);
+ }
+ else
+ RewriteTypeOfDecl(VD);
+ }
+ }
+ if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
+ if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
+ RewriteBlockPointerDecl(TD);
+ else if (TD->getUnderlyingType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
+ }
+ }
+ }
+
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
+ RewriteObjCQualifiedInterfaceTypes(CE);
+
+ if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
+ isa<DoStmt>(S) || isa<ForStmt>(S)) {
+ assert(!Stmts.empty() && "Statement stack is empty");
+ assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||
+ isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))
+ && "Statement stack mismatch");
+ Stmts.pop_back();
+ }
+ // Handle blocks rewriting.
+ if (BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(S)) {
+ if (BDRE->isByRef())
+ return RewriteBlockDeclRefExpr(BDRE);
+ }
+ if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
+ ValueDecl *VD = DRE->getDecl();
+ if (VD->hasAttr<BlocksAttr>())
+ return RewriteBlockDeclRefExpr(DRE);
+ if (HasLocalVariableExternalStorage(VD))
+ return RewriteLocalVariableExternalStorage(DRE);
+ }
+
+ if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
+ if (CE->getCallee()->getType()->isBlockPointerType()) {
+ Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
+ ReplaceStmt(S, BlockCall);
+ return BlockCall;
+ }
+ }
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
+ RewriteCastExpr(CE);
+ }
+#if 0
+ if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
+ CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
+ ICE->getSubExpr(),
+ SourceLocation());
+ // Get the new text.
+ std::string SStr;
+ llvm::raw_string_ostream Buf(SStr);
+ Replacement->printPretty(Buf, *Context);
+ const std::string &Str = Buf.str();
+
+ printf("CAST = %s\n", &Str[0]);
+ InsertText(ICE->getSubExpr()->getLocStart(), &Str[0], Str.size());
+ delete S;
+ return Replacement;
+ }
+#endif
+ // Return this stmt unmodified.
+ return S;
+}
+
+void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
+ for (RecordDecl::field_iterator i = RD->field_begin(),
+ e = RD->field_end(); i != e; ++i) {
+ FieldDecl *FD = *i;
+ if (isTopLevelBlockPointerType(FD->getType()))
+ RewriteBlockPointerDecl(FD);
+ if (FD->getType()->isObjCQualifiedIdType() ||
+ FD->getType()->isObjCQualifiedInterfaceType())
+ RewriteObjCQualifiedInterfaceTypes(FD);
+ }
+}
+
+/// HandleDeclInMainFile - This is called for each top-level decl defined in the
+/// main file of the input.
+void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
+ switch (D->getKind()) {
+ case Decl::Function: {
+ FunctionDecl *FD = cast<FunctionDecl>(D);
+ if (FD->isOverloadedOperator())
+ return;
+
+ // 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.
+ RewriteBlocksInFunctionProtoType(FD->getType(), FD);
+
+ // FIXME: If this should support Obj-C++, support CXXTryStmt
+ if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
+ CurFunctionDef = FD;
+ CurFunctionDeclToDeclareForBlock = FD;
+ CurrentBody = Body;
+ Body =
+ cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
+ FD->setBody(Body);
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ // This synthesizes and inserts the block "impl" struct, invoke function,
+ // and any copy/dispose helper functions.
+ InsertBlockLiteralsWithinFunction(FD);
+ CurFunctionDef = 0;
+ CurFunctionDeclToDeclareForBlock = 0;
+ }
+ break;
+ }
+ case Decl::ObjCMethod: {
+ ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
+ if (CompoundStmt *Body = MD->getCompoundBody()) {
+ CurMethodDef = MD;
+ CurrentBody = Body;
+ Body =
+ cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
+ MD->setBody(Body);
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ InsertBlockLiteralsWithinMethod(MD);
+ CurMethodDef = 0;
+ }
+ break;
+ }
+ case Decl::ObjCImplementation: {
+ ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
+ ClassImplementation.push_back(CI);
+ break;
+ }
+ case Decl::ObjCCategoryImpl: {
+ ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
+ CategoryImplementation.push_back(CI);
+ break;
+ }
+ case Decl::Var: {
+ VarDecl *VD = cast<VarDecl>(D);
+ RewriteObjCQualifiedInterfaceTypes(VD);
+ if (isTopLevelBlockPointerType(VD->getType()))
+ RewriteBlockPointerDecl(VD);
+ else if (VD->getType()->isFunctionPointerType()) {
+ CheckFunctionPointerDecl(VD->getType(), VD);
+ if (VD->getInit()) {
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
+ RewriteCastExpr(CE);
+ }
+ }
+ } else if (VD->getType()->isRecordType()) {
+ RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
+ if (RD->isCompleteDefinition())
+ RewriteRecordBody(RD);
+ }
+ if (VD->getInit()) {
+ GlobalVarDecl = VD;
+ CurrentBody = VD->getInit();
+ RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
+ CurrentBody = 0;
+ if (PropParentMap) {
+ delete PropParentMap;
+ PropParentMap = 0;
+ }
+ SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
+ GlobalVarDecl = 0;
+
+ // This is needed for blocks.
+ if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
+ RewriteCastExpr(CE);
+ }
+ }
+ break;
+ }
+ case Decl::TypeAlias:
+ case Decl::Typedef: {
+ if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
+ if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
+ RewriteBlockPointerDecl(TD);
+ else if (TD->getUnderlyingType()->isFunctionPointerType())
+ CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
+ }
+ break;
+ }
+ case Decl::CXXRecord:
+ case Decl::Record: {
+ RecordDecl *RD = cast<RecordDecl>(D);
+ if (RD->isCompleteDefinition())
+ RewriteRecordBody(RD);
+ break;
+ }
+ default:
+ break;
+ }
+ // Nothing yet.
+}
+
+void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
+ if (Diags.hasErrorOccurred())
+ return;
+
+ RewriteInclude();
+
+ // Here's a great place to add any extra declarations that may be needed.
+ // Write out meta data for each @protocol(<expr>).
+ for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
+ E = ProtocolExprDecls.end(); I != E; ++I)
+ RewriteObjCProtocolMetaData(*I, "", "", Preamble);
+
+ InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
+ if (ClassImplementation.size() || CategoryImplementation.size())
+ RewriteImplementations();
+
+ // Get the buffer corresponding to MainFileID. If we haven't changed it, then
+ // we are done.
+ if (const RewriteBuffer *RewriteBuf =
+ Rewrite.getRewriteBufferFor(MainFileID)) {
+ //printf("Changed:\n");
+ *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
+ } else {
+ llvm::errs() << "No changes\n";
+ }
+
+ if (ClassImplementation.size() || CategoryImplementation.size() ||
+ ProtocolExprDecls.size()) {
+ // Rewrite Objective-c meta data*
+ std::string ResultStr;
+ RewriteMetaDataIntoBuffer(ResultStr);
+ // Emit metadata.
+ *OutFile << ResultStr;
+ }
+ OutFile->flush();
+}
+
+void RewriteModernObjC::Initialize(ASTContext &context) {
+ InitializeCommon(context);
+
+ // declaring objc_selector outside the parameter list removes a silly
+ // scope related warning...
+ if (IsHeader)
+ Preamble = "#pragma once\n";
+ Preamble += "struct objc_selector; struct objc_class;\n";
+ Preamble += "struct __rw_objc_super { struct objc_object *object; ";
+ Preamble += "struct objc_object *superClass; ";
+ if (LangOpts.MicrosoftExt) {
+ // Add a constructor for creating temporary objects.
+ Preamble += "__rw_objc_super(struct objc_object *o, struct objc_object *s) "
+ ": ";
+ Preamble += "object(o), superClass(s) {} ";
+ }
+ Preamble += "};\n";
+ Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
+ Preamble += "typedef struct objc_object Protocol;\n";
+ Preamble += "#define _REWRITER_typedef_Protocol\n";
+ Preamble += "#endif\n";
+ if (LangOpts.MicrosoftExt) {
+ Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
+ Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
+ } else
+ Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSend";
+ Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_msgSendSuper";
+ Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSend_stret";
+ Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object* objc_msgSendSuper_stret";
+ Preamble += "(struct objc_super *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT double objc_msgSend_fpret";
+ Preamble += "(struct objc_object *, struct objc_selector *, ...);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getClass";
+ Preamble += "(const char *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
+ Preamble += "(struct objc_class *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
+ Preamble += "(const char *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw(struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_enter(void *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_exit(void *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_exception_extract(void *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT int objc_exception_match";
+ Preamble += "(struct objc_class *, struct objc_object *);\n";
+ // @synchronized hooks.
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_enter(struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_exit(struct objc_object *);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
+ Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
+ Preamble += "struct __objcFastEnumerationState {\n\t";
+ Preamble += "unsigned long state;\n\t";
+ Preamble += "void **itemsPtr;\n\t";
+ Preamble += "unsigned long *mutationsPtr;\n\t";
+ Preamble += "unsigned long extra[5];\n};\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
+ Preamble += "#define __FASTENUMERATIONSTATE\n";
+ Preamble += "#endif\n";
+ Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
+ Preamble += "struct __NSConstantStringImpl {\n";
+ Preamble += " int *isa;\n";
+ Preamble += " int flags;\n";
+ Preamble += " char *str;\n";
+ Preamble += " long length;\n";
+ Preamble += "};\n";
+ Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
+ Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
+ Preamble += "#else\n";
+ Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
+ Preamble += "#endif\n";
+ Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
+ Preamble += "#endif\n";
+ // Blocks preamble.
+ 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 Reserved;\n";
+ Preamble += " void *FuncPtr;\n";
+ Preamble += "};\n";
+ Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
+ Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
+ Preamble += "extern \"C\" __declspec(dllexport) "
+ "void _Block_object_assign(void *, const void *, const int);\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
+ Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
+ Preamble += "#else\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
+ Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
+ Preamble += "#endif\n";
+ Preamble += "#endif\n";
+ if (LangOpts.MicrosoftExt) {
+ Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
+ Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
+ Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
+ Preamble += "#define __attribute__(X)\n";
+ Preamble += "#endif\n";
+ Preamble += "#define __weak\n";
+ }
+ else {
+ Preamble += "#define __block\n";
+ Preamble += "#define __weak\n";
+ }
+ // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
+ // as this avoids warning in any 64bit/32bit compilation model.
+ Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
+}
+
+/// RewriteIvarOffsetComputation - This rutine synthesizes computation of
+/// ivar offset.
+void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
+ std::string &Result) {
+ if (ivar->isBitField()) {
+ // FIXME: The hack below doesn't work for bitfields. For now, we simply
+ // place all bitfields at offset 0.
+ Result += "0";
+ } else {
+ Result += "__OFFSETOFIVAR__(struct ";
+ Result += ivar->getContainingInterface()->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+ Result += ", ";
+ Result += ivar->getNameAsString();
+ Result += ")";
+ }
+}
+
+/// WriteModernMetadataDeclarations - Writes out metadata declarations for modern ABI.
+/// struct _prop_t {
+/// char *name;
+/// char *attributes;
+/// }
+
+/// struct _prop_list_t {
+/// uint32_t entsize; // sizeof(struct _prop_t)
+/// uint32_t count_of_properties;
+/// struct _prop_t prop_list[count_of_properties];
+/// }
+
+/// struct _protocol_t;
+
+/// struct _protocol_list_t {
+/// long protocol_count; // Note, this is 32/64 bit
+/// struct _protocol_t * protocol_list[protocol_count];
+/// }
+
+/// struct _objc_method {
+/// SEL _cmd;
+/// char *method_type;
+/// char *_imp;
+/// }
+
+/// struct _method_list_t {
+/// uint32_t entsize; // sizeof(struct _objc_method)
+/// uint32_t method_count;
+/// struct _objc_method method_list[method_count];
+/// }
+
+/// struct _protocol_t {
+/// id isa; // NULL
+/// const char * const protocol_name;
+/// const struct _protocol_list_t * protocol_list; // super protocols
+/// const struct method_list_t * const instance_methods;
+/// const struct method_list_t * const class_methods;
+/// const struct method_list_t *optionalInstanceMethods;
+/// const struct method_list_t *optionalClassMethods;
+/// const struct _prop_list_t * properties;
+/// const uint32_t size; // sizeof(struct _protocol_t)
+/// const uint32_t flags; // = 0
+/// const char ** extendedMethodTypes;
+/// }
+
+static void WriteModernMetadataDeclarations(std::string &Result) {
+ static bool meta_data_declared = false;
+ if (meta_data_declared)
+ return;
+
+ Result += "\nstruct _prop_t {\n";
+ Result += "\tchar *name;\n";
+ Result += "\tchar *attributes;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _prop_list_t {\n";
+ Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
+ Result += "\tunsigned int count_of_properties;\n";
+
+ Result += "\tstruct _prop_t prop_list[/*count_of_properties*/];\n";
+ Result += "};\n";
+
+ Result += "\nstruct _protocol_t;\n";
+
+ Result += "\nstruct _protocol_list_t {\n";
+ Result += "\tlong protocol_count; // Note, this is 32/64 bit\n";
+ Result += "\tstruct _protocol_t *protocol_list[/*protocol_count*/];\n";
+ Result += "};\n";
+
+ Result += "\nstruct _objc_method {\n";
+ Result += "\tstruct objc_selector * _cmd;\n";
+ Result += "\tchar *method_type;\n";
+ Result += "\tchar *_imp;\n";
+ Result += "};\n";
+
+ Result += "\nstruct _method_list_t {\n";
+ Result += "\tunsigned int entsize; // sizeof(struct _objc_method)\n";
+ Result += "\tunsigned int method_count;\n";
+ Result += "\tstruct _objc_method method_list[/*method_count*/];\n";
+ Result += "};\n";
+
+ Result += "\nstruct _protocol_t {\n";
+ Result += "\tvoid * isa; // NULL\n";
+ Result += "\tconst char * const protocol_name;\n";
+ Result += "\tconst struct _protocol_list_t * protocol_list; // super protocols\n";
+ Result += "\tconst struct method_list_t * const instance_methods;\n";
+ Result += "\tconst struct method_list_t * const class_methods;\n";
+ Result += "\tconst struct method_list_t *optionalInstanceMethods;\n";
+ Result += "\tconst struct method_list_t *optionalClassMethods;\n";
+ Result += "\tconst struct _prop_list_t * properties;\n";
+ Result += "\tconst unsigned int size; // sizeof(struct _protocol_t)\n";
+ Result += "\tconst unsigned int flags; // = 0\n";
+ Result += "\tconst char ** extendedMethodTypes;\n";
+ Result += "};\n";
+
+ meta_data_declared = true;
+}
+
+/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
+void RewriteModernObjC::RewriteObjCProtocolMetaData(
+ ObjCProtocolDecl *PDecl, StringRef prefix,
+ StringRef ClassName, std::string &Result) {
+ static bool objc_protocol_methods = false;
+
+ WriteModernMetadataDeclarations(Result);
+
+ // Output struct protocol_methods holder of method selector and type.
+ if (!objc_protocol_methods && PDecl->hasDefinition()) {
+ /* struct protocol_methods {
+ SEL _cmd;
+ char *method_types;
+ }
+ */
+ Result += "\nstruct _protocol_methods {\n";
+ Result += "\tstruct objc_selector *_cmd;\n";
+ Result += "\tchar *method_types;\n";
+ Result += "};\n";
+
+ objc_protocol_methods = true;
+ }
+ // Do not synthesize the protocol more than once.
+ if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
+ return;
+
+ if (ObjCProtocolDecl *Def = PDecl->getDefinition())
+ PDecl = Def;
+
+ if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
+ unsigned NumMethods = std::distance(PDecl->instmeth_begin(),
+ PDecl->instmeth_end());
+ /* struct _objc_protocol_method_list {
+ int protocol_method_count;
+ struct protocol_methods protocols[];
+ }
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tint protocol_method_count;\n";
+ Result += "\tstruct _protocol_methods protocol_methods[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_PROTOCOL_INSTANCE_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_inst_meth\")))= "
+ "{\n\t" + utostr(NumMethods) + "\n";
+
+ // Output instance methods declared in this protocol.
+ for (ObjCProtocolDecl::instmeth_iterator
+ I = PDecl->instmeth_begin(), E = PDecl->instmeth_end();
+ I != E; ++I) {
+ if (I == PDecl->instmeth_begin())
+ Result += "\t ,{{(struct objc_selector *)\"";
+ else
+ Result += "\t ,{(struct objc_selector *)\"";
+ Result += (*I)->getSelector().getAsString();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl((*I), MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\"}\n";
+ }
+ Result += "\t }\n};\n";
+ }
+
+ // Output class methods declared in this protocol.
+ unsigned NumMethods = std::distance(PDecl->classmeth_begin(),
+ PDecl->classmeth_end());
+ if (NumMethods > 0) {
+ /* struct _objc_protocol_method_list {
+ int protocol_method_count;
+ struct protocol_methods protocols[];
+ }
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tint protocol_method_count;\n";
+ Result += "\tstruct _protocol_methods protocol_methods[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_PROTOCOL_CLASS_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
+ "{\n\t";
+ Result += utostr(NumMethods);
+ Result += "\n";
+
+ // Output instance methods declared in this protocol.
+ for (ObjCProtocolDecl::classmeth_iterator
+ I = PDecl->classmeth_begin(), E = PDecl->classmeth_end();
+ I != E; ++I) {
+ if (I == PDecl->classmeth_begin())
+ Result += "\t ,{{(struct objc_selector *)\"";
+ else
+ Result += "\t ,{(struct objc_selector *)\"";
+ Result += (*I)->getSelector().getAsString();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl((*I), MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\"}\n";
+ }
+ Result += "\t }\n};\n";
+ }
+
+ // Output:
+ /* struct _objc_protocol {
+ // Objective-C 1.0 extensions
+ struct _objc_protocol_extension *isa;
+ char *protocol_name;
+ struct _objc_protocol **protocol_list;
+ struct _objc_protocol_method_list *instance_methods;
+ struct _objc_protocol_method_list *class_methods;
+ };
+ */
+ static bool objc_protocol = false;
+ if (!objc_protocol) {
+ Result += "\nstruct _objc_protocol {\n";
+ Result += "\tstruct _objc_protocol_extension *isa;\n";
+ Result += "\tchar *protocol_name;\n";
+ Result += "\tstruct _objc_protocol **protocol_list;\n";
+ Result += "\tstruct _objc_protocol_method_list *instance_methods;\n";
+ Result += "\tstruct _objc_protocol_method_list *class_methods;\n";
+ Result += "};\n";
+
+ objc_protocol = true;
+ }
+
+ Result += "\nstatic struct _objc_protocol _OBJC_PROTOCOL_";
+ Result += PDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __protocol\")))= "
+ "{\n\t0, \"";
+ Result += PDecl->getNameAsString();
+ Result += "\", 0, ";
+ if (PDecl->instmeth_begin() != PDecl->instmeth_end()) {
+ Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += ", ";
+ }
+ else
+ Result += "0, ";
+ if (PDecl->classmeth_begin() != PDecl->classmeth_end()) {
+ Result += "(struct _objc_protocol_method_list *)&_OBJC_PROTOCOL_CLASS_METHODS_";
+ Result += PDecl->getNameAsString();
+ Result += "\n";
+ }
+ else
+ Result += "0\n";
+ Result += "};\n";
+
+ // Mark this protocol as having been generated.
+ if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()))
+ llvm_unreachable("protocol already synthesized");
+
+}
+
+void RewriteModernObjC::RewriteObjCProtocolListMetaData(
+ const ObjCList<ObjCProtocolDecl> &Protocols,
+ StringRef prefix, StringRef ClassName,
+ std::string &Result) {
+ if (Protocols.empty()) return;
+
+ for (unsigned i = 0; i != Protocols.size(); i++)
+ RewriteObjCProtocolMetaData(Protocols[i], prefix, ClassName, Result);
+
+ // Output the top lovel protocol meta-data for the class.
+ /* struct _objc_protocol_list {
+ struct _objc_protocol_list *next;
+ int protocol_count;
+ struct _objc_protocol *class_protocols[];
+ }
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tstruct _objc_protocol_list *next;\n";
+ Result += "\tint protocol_count;\n";
+ Result += "\tstruct _objc_protocol *class_protocols[";
+ Result += utostr(Protocols.size());
+ Result += "];\n} _OBJC_";
+ Result += prefix;
+ Result += "_PROTOCOLS_";
+ Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __cat_cls_meth\")))= "
+ "{\n\t0, ";
+ Result += utostr(Protocols.size());
+ Result += "\n";
+
+ Result += "\t,{&_OBJC_PROTOCOL_";
+ Result += Protocols[0]->getNameAsString();
+ Result += " \n";
+
+ for (unsigned i = 1; i != Protocols.size(); i++) {
+ Result += "\t ,&_OBJC_PROTOCOL_";
+ Result += Protocols[i]->getNameAsString();
+ Result += "\n";
+ }
+ Result += "\t }\n};\n";
+}
+
+void RewriteModernObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
+ std::string &Result) {
+ ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
+
+ // Explicitly declared @interface's are already synthesized.
+ if (CDecl->isImplicitInterfaceDecl()) {
+ // FIXME: Implementation of a class with no @interface (legacy) does not
+ // produce correct synthesis as yet.
+ RewriteObjCInternalStruct(CDecl, Result);
+ }
+
+ // Build _objc_ivar_list metadata for classes ivars if needed
+ unsigned NumIvars = !IDecl->ivar_empty()
+ ? IDecl->ivar_size()
+ : (CDecl ? CDecl->ivar_size() : 0);
+ if (NumIvars > 0) {
+ static bool objc_ivar = false;
+ if (!objc_ivar) {
+ /* struct _objc_ivar {
+ char *ivar_name;
+ char *ivar_type;
+ int ivar_offset;
+ };
+ */
+ Result += "\nstruct _objc_ivar {\n";
+ Result += "\tchar *ivar_name;\n";
+ Result += "\tchar *ivar_type;\n";
+ Result += "\tint ivar_offset;\n";
+ Result += "};\n";
+
+ objc_ivar = true;
+ }
+
+ /* struct {
+ int ivar_count;
+ struct _objc_ivar ivar_list[nIvars];
+ };
+ */
+ Result += "\nstatic struct {\n";
+ Result += "\tint ivar_count;\n";
+ Result += "\tstruct _objc_ivar ivar_list[";
+ Result += utostr(NumIvars);
+ Result += "];\n} _OBJC_INSTANCE_VARIABLES_";
+ Result += IDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __instance_vars\")))= "
+ "{\n\t";
+ Result += utostr(NumIvars);
+ Result += "\n";
+
+ ObjCInterfaceDecl::ivar_iterator IVI, IVE;
+ SmallVector<ObjCIvarDecl *, 8> IVars;
+ if (!IDecl->ivar_empty()) {
+ for (ObjCInterfaceDecl::ivar_iterator
+ IV = IDecl->ivar_begin(), IVEnd = IDecl->ivar_end();
+ IV != IVEnd; ++IV)
+ IVars.push_back(*IV);
+ IVI = IDecl->ivar_begin();
+ IVE = IDecl->ivar_end();
+ } else {
+ IVI = CDecl->ivar_begin();
+ IVE = CDecl->ivar_end();
+ }
+ Result += "\t,{{\"";
+ Result += (*IVI)->getNameAsString();
+ Result += "\", \"";
+ std::string TmpString, StrEncoding;
+ Context->getObjCEncodingForType((*IVI)->getType(), TmpString, *IVI);
+ QuoteDoublequotes(TmpString, StrEncoding);
+ Result += StrEncoding;
+ Result += "\", ";
+ RewriteIvarOffsetComputation(*IVI, Result);
+ Result += "}\n";
+ for (++IVI; IVI != IVE; ++IVI) {
+ Result += "\t ,{\"";
+ Result += (*IVI)->getNameAsString();
+ Result += "\", \"";
+ std::string TmpString, StrEncoding;
+ Context->getObjCEncodingForType((*IVI)->getType(), TmpString, *IVI);
+ QuoteDoublequotes(TmpString, StrEncoding);
+ Result += StrEncoding;
+ Result += "\", ";
+ RewriteIvarOffsetComputation((*IVI), Result);
+ Result += "}\n";
+ }
+
+ Result += "\t }\n};\n";
+ }
+
+ // Build _objc_method_list for class's instance methods if needed
+ SmallVector<ObjCMethodDecl *, 32>
+ InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
+
+ // If any of our property implementations have associated getters or
+ // setters, produce metadata for them as well.
+ for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
+ PropEnd = IDecl->propimpl_end();
+ Prop != PropEnd; ++Prop) {
+ if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ continue;
+ if (!(*Prop)->getPropertyIvarDecl())
+ continue;
+ ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
+ if (!PD)
+ continue;
+ if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
+ if (!Getter->isDefined())
+ InstanceMethods.push_back(Getter);
+ if (PD->isReadOnly())
+ continue;
+ if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
+ if (!Setter->isDefined())
+ InstanceMethods.push_back(Setter);
+ }
+ RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
+ true, "", IDecl->getName(), Result);
+
+ // Build _objc_method_list for class's class methods if needed
+ RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
+ false, "", IDecl->getName(), Result);
+
+ // Protocols referenced in class declaration?
+ RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(),
+ "CLASS", CDecl->getName(), Result);
+
+ // Declaration of class/meta-class metadata
+ /* struct _objc_class {
+ struct _objc_class *isa; // or const char *root_class_name when metadata
+ const char *super_class_name;
+ char *name;
+ long version;
+ long info;
+ long instance_size;
+ struct _objc_ivar_list *ivars;
+ struct _objc_method_list *methods;
+ struct objc_cache *cache;
+ struct objc_protocol_list *protocols;
+ const char *ivar_layout;
+ struct _objc_class_ext *ext;
+ };
+ */
+ static bool objc_class = false;
+ if (!objc_class) {
+ Result += "\nstruct _objc_class {\n";
+ Result += "\tstruct _objc_class *isa;\n";
+ Result += "\tconst char *super_class_name;\n";
+ Result += "\tchar *name;\n";
+ Result += "\tlong version;\n";
+ Result += "\tlong info;\n";
+ Result += "\tlong instance_size;\n";
+ Result += "\tstruct _objc_ivar_list *ivars;\n";
+ Result += "\tstruct _objc_method_list *methods;\n";
+ Result += "\tstruct objc_cache *cache;\n";
+ Result += "\tstruct _objc_protocol_list *protocols;\n";
+ Result += "\tconst char *ivar_layout;\n";
+ Result += "\tstruct _objc_class_ext *ext;\n";
+ Result += "};\n";
+ objc_class = true;
+ }
+
+ // Meta-class metadata generation.
+ ObjCInterfaceDecl *RootClass = 0;
+ ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
+ while (SuperClass) {
+ RootClass = SuperClass;
+ SuperClass = SuperClass->getSuperClass();
+ }
+ SuperClass = CDecl->getSuperClass();
+
+ Result += "\nstatic struct _objc_class _OBJC_METACLASS_";
+ Result += CDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __meta_class\")))= "
+ "{\n\t(struct _objc_class *)\"";
+ Result += (RootClass ? RootClass->getNameAsString() : CDecl->getNameAsString());
+ Result += "\"";
+
+ if (SuperClass) {
+ Result += ", \"";
+ Result += SuperClass->getNameAsString();
+ Result += "\", \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ else {
+ Result += ", 0, \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ // Set 'ivars' field for root class to 0. ObjC1 runtime does not use it.
+ // 'info' field is initialized to CLS_META(2) for metaclass
+ Result += ", 0,2, sizeof(struct _objc_class), 0";
+ if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
+ Result += "\n\t, (struct _objc_method_list *)&_OBJC_CLASS_METHODS_";
+ Result += IDecl->getNameAsString();
+ Result += "\n";
+ }
+ else
+ Result += ", 0\n";
+ if (CDecl->protocol_begin() != CDecl->protocol_end()) {
+ Result += "\t,0, (struct _objc_protocol_list *)&_OBJC_CLASS_PROTOCOLS_";
+ Result += CDecl->getNameAsString();
+ Result += ",0,0\n";
+ }
+ else
+ Result += "\t,0,0,0,0\n";
+ Result += "};\n";
+
+ // class metadata generation.
+ Result += "\nstatic struct _objc_class _OBJC_CLASS_";
+ Result += CDecl->getNameAsString();
+ Result += " __attribute__ ((used, section (\"__OBJC, __class\")))= "
+ "{\n\t&_OBJC_METACLASS_";
+ Result += CDecl->getNameAsString();
+ if (SuperClass) {
+ Result += ", \"";
+ Result += SuperClass->getNameAsString();
+ Result += "\", \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ else {
+ Result += ", 0, \"";
+ Result += CDecl->getNameAsString();
+ Result += "\"";
+ }
+ // 'info' field is initialized to CLS_CLASS(1) for class
+ Result += ", 0,1";
+ if (!ObjCSynthesizedStructs.count(CDecl))
+ Result += ",0";
+ else {
+ // class has size. Must synthesize its size.
+ Result += ",sizeof(struct ";
+ Result += CDecl->getNameAsString();
+ if (LangOpts.MicrosoftExt)
+ Result += "_IMPL";
+ Result += ")";
+ }
+ if (NumIvars > 0) {
+ Result += ", (struct _objc_ivar_list *)&_OBJC_INSTANCE_VARIABLES_";
+ Result += CDecl->getNameAsString();
+ Result += "\n\t";
+ }
+ else
+ Result += ",0";
+ if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
+ Result += ", (struct _objc_method_list *)&_OBJC_INSTANCE_METHODS_";
+ Result += CDecl->getNameAsString();
+ Result += ", 0\n\t";
+ }
+ else
+ Result += ",0,0";
+ if (CDecl->protocol_begin() != CDecl->protocol_end()) {
+ Result += ", (struct _objc_protocol_list*)&_OBJC_CLASS_PROTOCOLS_";
+ Result += CDecl->getNameAsString();
+ Result += ", 0,0\n";
+ }
+ else
+ Result += ",0,0,0\n";
+ Result += "};\n";
+}
+
+void RewriteModernObjC::RewriteMetaDataIntoBuffer(std::string &Result) {
+ int ClsDefCount = ClassImplementation.size();
+ int CatDefCount = CategoryImplementation.size();
+
+ // For each implemented class, write out all its meta data.
+ for (int i = 0; i < ClsDefCount; i++)
+ RewriteObjCClassMetaData(ClassImplementation[i], Result);
+
+ // For each implemented category, write out all its meta data.
+ for (int i = 0; i < CatDefCount; i++)
+ RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
+
+ // Write objc_symtab metadata
+ /*
+ struct _objc_symtab
+ {
+ long sel_ref_cnt;
+ SEL *refs;
+ short cls_def_cnt;
+ short cat_def_cnt;
+ void *defs[cls_def_cnt + cat_def_cnt];
+ };
+ */
+
+ Result += "\nstruct _objc_symtab {\n";
+ Result += "\tlong sel_ref_cnt;\n";
+ Result += "\tSEL *refs;\n";
+ Result += "\tshort cls_def_cnt;\n";
+ Result += "\tshort cat_def_cnt;\n";
+ Result += "\tvoid *defs[" + utostr(ClsDefCount + CatDefCount)+ "];\n";
+ Result += "};\n\n";
+
+ Result += "static struct _objc_symtab "
+ "_OBJC_SYMBOLS __attribute__((used, section (\"__OBJC, __symbols\")))= {\n";
+ Result += "\t0, 0, " + utostr(ClsDefCount)
+ + ", " + utostr(CatDefCount) + "\n";
+ for (int i = 0; i < ClsDefCount; i++) {
+ Result += "\t,&_OBJC_CLASS_";
+ Result += ClassImplementation[i]->getNameAsString();
+ Result += "\n";
+ }
+
+ for (int i = 0; i < CatDefCount; i++) {
+ Result += "\t,&_OBJC_CATEGORY_";
+ Result += CategoryImplementation[i]->getClassInterface()->getNameAsString();
+ Result += "_";
+ Result += CategoryImplementation[i]->getNameAsString();
+ Result += "\n";
+ }
+
+ Result += "};\n\n";
+
+ // Write objc_module metadata
+
+ /*
+ struct _objc_module {
+ long version;
+ long size;
+ const char *name;
+ struct _objc_symtab *symtab;
+ }
+ */
+
+ Result += "\nstruct _objc_module {\n";
+ Result += "\tlong version;\n";
+ Result += "\tlong size;\n";
+ Result += "\tconst char *name;\n";
+ Result += "\tstruct _objc_symtab *symtab;\n";
+ Result += "};\n\n";
+ Result += "static struct _objc_module "
+ "_OBJC_MODULES __attribute__ ((used, section (\"__OBJC, __module_info\")))= {\n";
+ Result += "\t" + utostr(OBJC_ABI_VERSION) +
+ ", sizeof(struct _objc_module), \"\", &_OBJC_SYMBOLS\n";
+ Result += "};\n\n";
+
+ if (LangOpts.MicrosoftExt) {
+ if (ProtocolExprDecls.size()) {
+ Result += "#pragma section(\".objc_protocol$B\",long,read,write)\n";
+ Result += "#pragma data_seg(push, \".objc_protocol$B\")\n";
+ for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
+ E = ProtocolExprDecls.end(); I != E; ++I) {
+ Result += "static struct _objc_protocol *_POINTER_OBJC_PROTOCOL_";
+ Result += (*I)->getNameAsString();
+ Result += " = &_OBJC_PROTOCOL_";
+ Result += (*I)->getNameAsString();
+ Result += ";\n";
+ }
+ Result += "#pragma data_seg(pop)\n\n";
+ }
+ Result += "#pragma section(\".objc_module_info$B\",long,read,write)\n";
+ Result += "#pragma data_seg(push, \".objc_module_info$B\")\n";
+ Result += "static struct _objc_module *_POINTER_OBJC_MODULES = ";
+ Result += "&_OBJC_MODULES;\n";
+ Result += "#pragma data_seg(pop)\n\n";
+ }
+}
+
+/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
+/// implementation.
+void RewriteModernObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
+ std::string &Result) {
+ ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
+ // Find category declaration for this implementation.
+ ObjCCategoryDecl *CDecl;
+ for (CDecl = ClassDecl->getCategoryList(); CDecl;
+ CDecl = CDecl->getNextClassCategory())
+ if (CDecl->getIdentifier() == IDecl->getIdentifier())
+ break;
+
+ std::string FullCategoryName = ClassDecl->getNameAsString();
+ FullCategoryName += '_';
+ FullCategoryName += IDecl->getNameAsString();
+
+ // Build _objc_method_list for class's instance methods if needed
+ SmallVector<ObjCMethodDecl *, 32>
+ InstanceMethods(IDecl->instmeth_begin(), IDecl->instmeth_end());
+
+ // If any of our property implementations have associated getters or
+ // setters, produce metadata for them as well.
+ for (ObjCImplDecl::propimpl_iterator Prop = IDecl->propimpl_begin(),
+ PropEnd = IDecl->propimpl_end();
+ Prop != PropEnd; ++Prop) {
+ if ((*Prop)->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
+ continue;
+ if (!(*Prop)->getPropertyIvarDecl())
+ continue;
+ ObjCPropertyDecl *PD = (*Prop)->getPropertyDecl();
+ if (!PD)
+ continue;
+ if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
+ InstanceMethods.push_back(Getter);
+ if (PD->isReadOnly())
+ continue;
+ if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
+ InstanceMethods.push_back(Setter);
+ }
+ RewriteObjCMethodsMetaData(InstanceMethods.begin(), InstanceMethods.end(),
+ true, "CATEGORY_", FullCategoryName.c_str(),
+ Result);
+
+ // Build _objc_method_list for class's class methods if needed
+ RewriteObjCMethodsMetaData(IDecl->classmeth_begin(), IDecl->classmeth_end(),
+ false, "CATEGORY_", FullCategoryName.c_str(),
+ Result);
+
+ // Protocols referenced in class declaration?
+ // Null CDecl is case of a category implementation with no category interface
+ if (CDecl)
+ RewriteObjCProtocolListMetaData(CDecl->getReferencedProtocols(), "CATEGORY",
+ FullCategoryName, Result);
+ /* struct _objc_category {
+ char *category_name;
+ char *class_name;
+ struct _objc_method_list *instance_methods;
+ struct _objc_method_list *class_methods;
+ struct _objc_protocol_list *protocols;
+ // Objective-C 1.0 extensions
+ uint32_t size; // sizeof (struct _objc_category)
+ struct _objc_property_list *instance_properties; // category's own
+ // @property decl.
+ };
+ */
+
+ static bool objc_category = false;
+ if (!objc_category) {
+ Result += "\nstruct _objc_category {\n";
+ Result += "\tchar *category_name;\n";
+ Result += "\tchar *class_name;\n";
+ Result += "\tstruct _objc_method_list *instance_methods;\n";
+ Result += "\tstruct _objc_method_list *class_methods;\n";
+ Result += "\tstruct _objc_protocol_list *protocols;\n";
+ Result += "\tunsigned int size;\n";
+ Result += "\tstruct _objc_property_list *instance_properties;\n";
+ Result += "};\n";
+ objc_category = true;
+ }
+ Result += "\nstatic struct _objc_category _OBJC_CATEGORY_";
+ Result += FullCategoryName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __category\")))= {\n\t\"";
+ Result += IDecl->getNameAsString();
+ Result += "\"\n\t, \"";
+ Result += ClassDecl->getNameAsString();
+ Result += "\"\n";
+
+ if (IDecl->instmeth_begin() != IDecl->instmeth_end()) {
+ Result += "\t, (struct _objc_method_list *)"
+ "&_OBJC_CATEGORY_INSTANCE_METHODS_";
+ Result += FullCategoryName;
+ Result += "\n";
+ }
+ else
+ Result += "\t, 0\n";
+ if (IDecl->classmeth_begin() != IDecl->classmeth_end()) {
+ Result += "\t, (struct _objc_method_list *)"
+ "&_OBJC_CATEGORY_CLASS_METHODS_";
+ Result += FullCategoryName;
+ Result += "\n";
+ }
+ else
+ Result += "\t, 0\n";
+
+ if (CDecl && CDecl->protocol_begin() != CDecl->protocol_end()) {
+ Result += "\t, (struct _objc_protocol_list *)&_OBJC_CATEGORY_PROTOCOLS_";
+ Result += FullCategoryName;
+ Result += "\n";
+ }
+ else
+ Result += "\t, 0\n";
+ Result += "\t, sizeof(struct _objc_category), 0\n};\n";
+}
+
+// RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
+/// class methods.
+template<typename MethodIterator>
+void RewriteModernObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
+ MethodIterator MethodEnd,
+ bool IsInstanceMethod,
+ StringRef prefix,
+ StringRef ClassName,
+ std::string &Result) {
+ if (MethodBegin == MethodEnd) return;
+
+ if (!objc_impl_method) {
+ /* struct _objc_method {
+ SEL _cmd;
+ char *method_types;
+ void *_imp;
+ }
+ */
+ Result += "\nstruct _objc_method {\n";
+ Result += "\tSEL _cmd;\n";
+ Result += "\tchar *method_types;\n";
+ Result += "\tvoid *_imp;\n";
+ Result += "};\n";
+
+ objc_impl_method = true;
+ }
+
+ // Build _objc_method_list for class's methods if needed
+
+ /* struct {
+ struct _objc_method_list *next_method;
+ int method_count;
+ struct _objc_method method_list[];
+ }
+ */
+ unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
+ Result += "\nstatic struct {\n";
+ Result += "\tstruct _objc_method_list *next_method;\n";
+ Result += "\tint method_count;\n";
+ Result += "\tstruct _objc_method method_list[";
+ Result += utostr(NumMethods);
+ Result += "];\n} _OBJC_";
+ Result += prefix;
+ Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
+ Result += "_METHODS_";
+ Result += ClassName;
+ Result += " __attribute__ ((used, section (\"__OBJC, __";
+ Result += IsInstanceMethod ? "inst" : "cls";
+ Result += "_meth\")))= ";
+ Result += "{\n\t0, " + utostr(NumMethods) + "\n";
+
+ Result += "\t,{{(SEL)\"";
+ Result += (*MethodBegin)->getSelector().getAsString().c_str();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\", (void *)";
+ Result += MethodInternalNames[*MethodBegin];
+ Result += "}\n";
+ for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
+ Result += "\t ,{(SEL)\"";
+ Result += (*MethodBegin)->getSelector().getAsString().c_str();
+ std::string MethodTypeString;
+ Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
+ Result += "\", \"";
+ Result += MethodTypeString;
+ Result += "\", (void *)";
+ Result += MethodInternalNames[*MethodBegin];
+ Result += "}\n";
+ }
+ Result += "\t }\n};\n";
+}
+
+Stmt *RewriteModernObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
+ SourceRange OldRange = IV->getSourceRange();
+ Expr *BaseExpr = IV->getBase();
+
+ // Rewrite the base, but without actually doing replaces.
+ {
+ DisableReplaceStmtScope S(*this);
+ BaseExpr = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
+ IV->setBase(BaseExpr);
+ }
+
+ ObjCIvarDecl *D = IV->getDecl();
+
+ Expr *Replacement = IV;
+ if (CurMethodDef) {
+ if (BaseExpr->getType()->isObjCObjectPointerType()) {
+ const ObjCInterfaceType *iFaceDecl =
+ dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
+ assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null");
+ // lookup which class implements the instance variable.
+ ObjCInterfaceDecl *clsDeclared = 0;
+ iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
+ clsDeclared);
+ assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
+
+ // Synthesize an explicit cast to gain access to the ivar.
+ std::string RecName = clsDeclared->getIdentifier()->getName();
+ RecName += "_IMPL";
+ IdentifierInfo *II = &Context->Idents.get(RecName);
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
+ CK_BitCast,
+ IV->getBase());
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(OldRange.getBegin(),
+ OldRange.getEnd(),
+ castExpr);
+ if (IV->isFreeIvar() &&
+ declaresSameEntity(CurMethodDef->getClassInterface(), iFaceDecl->getDecl())) {
+ MemberExpr *ME = new (Context) MemberExpr(PE, true, D,
+ IV->getLocation(),
+ D->getType(),
+ VK_LValue, OK_Ordinary);
+ Replacement = ME;
+ } else {
+ IV->setBase(PE);
+ }
+ }
+ } else { // we are outside a method.
+ assert(!IV->isFreeIvar() && "Cannot have a free standing ivar outside a method");
+
+ // Explicit ivar refs need to have a cast inserted.
+ // FIXME: consider sharing some of this code with the code above.
+ if (BaseExpr->getType()->isObjCObjectPointerType()) {
+ const ObjCInterfaceType *iFaceDecl =
+ dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
+ // lookup which class implements the instance variable.
+ ObjCInterfaceDecl *clsDeclared = 0;
+ iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
+ clsDeclared);
+ assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class");
+
+ // Synthesize an explicit cast to gain access to the ivar.
+ std::string RecName = clsDeclared->getIdentifier()->getName();
+ RecName += "_IMPL";
+ IdentifierInfo *II = &Context->Idents.get(RecName);
+ RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
+ SourceLocation(), SourceLocation(),
+ II);
+ assert(RD && "RewriteObjCIvarRefExpr(): Can't find RecordDecl");
+ QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
+ CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, castT,
+ CK_BitCast,
+ IV->getBase());
+ // Don't forget the parens to enforce the proper binding.
+ ParenExpr *PE = new (Context) ParenExpr(IV->getBase()->getLocStart(),
+ IV->getBase()->getLocEnd(), castExpr);
+ // Cannot delete IV->getBase(), since PE points to it.
+ // Replace the old base with the cast. This is important when doing
+ // embedded rewrites. For example, [newInv->_container addObject:0].
+ IV->setBase(PE);
+ }
+ }
+
+ ReplaceStmtWithRange(IV, Replacement, OldRange);
+ return Replacement;
+}
+
diff --git a/lib/Rewrite/RewriteObjC.cpp b/lib/Rewrite/RewriteObjC.cpp
index 4d26eb8..5018112 100644
--- a/lib/Rewrite/RewriteObjC.cpp
+++ b/lib/Rewrite/RewriteObjC.cpp
@@ -590,12 +590,7 @@
DiagnosticsEngine &Diags,
const LangOptions &LOpts,
bool SilenceRewriteMacroWarning) {
- if (true /*!LOpts.ObjCNonFragileABI*/)
- return new RewriteObjCFragileABI(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
- else {
- assert(false && "objective-C rewriter for nonfragile ABI = NYI");
- return 0;
- }
+ return new RewriteObjCFragileABI(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
}
void RewriteObjC::InitializeCommon(ASTContext &context) {
