зеркало из https://github.com/microsoft/clang.git
Integrate the blocks and objc rewriters.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58253 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Steve Naroff
Родитель
8b3f6b5c52
Коммит
54055232a5
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@ -80,7 +80,7 @@ namespace {
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int BcLabelCount;
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// Needed for super.
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ObjCMethodDecl *CurMethodDecl;
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ObjCMethodDecl *CurMethodDef;
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RecordDecl *SuperStructDecl;
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RecordDecl *ConstantStringDecl;
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@ -91,7 +91,21 @@ namespace {
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std::string OutFileName;
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std::string Preamble;
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// Block expressions.
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llvm::SmallVector<BlockExpr *, 32> Blocks;
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llvm::SmallVector<BlockDeclRefExpr *, 32> BlockDeclRefs;
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llvm::DenseMap<BlockDeclRefExpr *, CallExpr *> BlockCallExprs;
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// Block related declarations.
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llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDecls;
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llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDecls;
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llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
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llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
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FunctionDecl *CurFunctionDef;
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static const int OBJC_ABI_VERSION =7 ;
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public:
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virtual void Initialize(ASTContext &context);
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@ -231,9 +245,83 @@ namespace {
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ObjCIvarDecl *ivar,
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std::string &Result);
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void RewriteImplementations(std::string &Result);
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// Block rewriting.
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void RewriteBlocksInFunctionTypeProto(QualType funcType, NamedDecl *D);
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void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
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void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
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void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
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// Block specific rewrite rules.
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std::string SynthesizeBlockInitExpr(BlockExpr *Exp, VarDecl *VD=0);
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void RewriteBlockCall(CallExpr *Exp);
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void RewriteBlockPointerDecl(NamedDecl *VD);
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void RewriteBlockDeclRefExpr(BlockDeclRefExpr *VD);
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void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
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std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
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const char *funcName, std::string Tag);
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std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
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const char *funcName, std::string Tag);
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std::string SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
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bool hasCopyDisposeHelpers);
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std::string SynthesizeBlockCall(CallExpr *Exp);
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void SynthesizeBlockLiterals(SourceLocation FunLocStart,
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const char *FunName);
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void CollectBlockDeclRefInfo(BlockExpr *Exp);
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void GetBlockCallExprs(Stmt *S);
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void GetBlockDeclRefExprs(Stmt *S);
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// We avoid calling Type::isBlockPointerType(), since it operates on the
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// canonical type. We only care if the top-level type is a closure pointer.
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bool isBlockPointerType(QualType T) { return isa<BlockPointerType>(T); }
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// FIXME: This predicate seems like it would be useful to add to ASTContext.
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bool isObjCType(QualType T) {
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if (!LangOpts.ObjC1 && !LangOpts.ObjC2)
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return false;
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QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
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if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
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OCT == Context->getCanonicalType(Context->getObjCClassType()))
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return true;
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if (const PointerType *PT = OCT->getAsPointerType()) {
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if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
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isa<ObjCQualifiedIdType>(PT->getPointeeType()))
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return true;
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}
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return false;
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}
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bool PointerTypeTakesAnyBlockArguments(QualType QT);
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void GetExtentOfArgList(const char *Name, const char *&LParen, const char *&RParen);
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void RewriteCastExpr(CastExpr *CE);
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};
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}
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void RewriteObjC::RewriteBlocksInFunctionTypeProto(QualType funcType,
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NamedDecl *D) {
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if (FunctionTypeProto *fproto = dyn_cast<FunctionTypeProto>(funcType)) {
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for (FunctionTypeProto::arg_type_iterator I = fproto->arg_type_begin(),
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E = fproto->arg_type_end(); I && (I != E); ++I)
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if (isBlockPointerType(*I)) {
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// All the args are checked/rewritten. Don't call twice!
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RewriteBlockPointerDecl(D);
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break;
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}
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}
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}
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void RewriteObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
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const PointerType *PT = funcType->getAsPointerType();
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if (PT && PointerTypeTakesAnyBlockArguments(funcType))
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RewriteBlocksInFunctionTypeProto(PT->getPointeeType(), ND);
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}
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static bool IsHeaderFile(const std::string &Filename) {
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std::string::size_type DotPos = Filename.rfind('.');
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@ -281,7 +369,8 @@ void RewriteObjC::Initialize(ASTContext &context) {
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GetProtocolFunctionDecl = 0;
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ConstantStringClassReference = 0;
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NSStringRecord = 0;
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CurMethodDecl = 0;
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CurMethodDef = 0;
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CurFunctionDef = 0;
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SuperStructDecl = 0;
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ConstantStringDecl = 0;
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BcLabelCount = 0;
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@ -371,6 +460,31 @@ void RewriteObjC::Initialize(ASTContext &context) {
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Preamble += "#undef __OBJC_RW_EXTERN\n";
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Preamble += "#define __attribute__(X)\n";
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}
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// Blocks preamble.
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Preamble += "#ifndef BLOCK_IMPL\n";
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Preamble += "#define BLOCK_IMPL\n";
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Preamble += "struct __block_impl {\n";
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Preamble += " void *isa;\n";
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Preamble += " int Flags;\n";
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Preamble += " int Size;\n";
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Preamble += " void *FuncPtr;\n";
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Preamble += "};\n";
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Preamble += "enum {\n";
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Preamble += " BLOCK_HAS_COPY_DISPOSE = (1<<25),\n";
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Preamble += " BLOCK_IS_GLOBAL = (1<<28)\n";
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Preamble += "};\n";
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if (LangOpts.Microsoft)
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Preamble += "#define __OBJC_RW_EXTERN extern \"C\" __declspec(dllimport)\n";
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else
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Preamble += "#define __OBJC_RW_EXTERN extern\n";
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Preamble += "// Runtime copy/destroy helper functions\n";
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Preamble += "__OBJC_RW_EXTERN void _Block_copy_assign(void *, void *);\n";
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Preamble += "__OBJC_RW_EXTERN void _Block_byref_assign_copy(void *, void *);\n";
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Preamble += "__OBJC_RW_EXTERN void _Block_destroy(void *);\n";
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Preamble += "__OBJC_RW_EXTERN void _Block_byref_release(void *);\n";
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Preamble += "__OBJC_RW_EXTERN void *_NSConcreteGlobalBlock;\n";
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Preamble += "__OBJC_RW_EXTERN void *_NSConcreteStackBlock;\n";
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Preamble += "#endif\n";
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}
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@ -415,16 +529,29 @@ void RewriteObjC::HandleTopLevelDecl(Decl *D) {
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/// HandleDeclInMainFile - This is called for each top-level decl defined in the
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/// main file of the input.
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void RewriteObjC::HandleDeclInMainFile(Decl *D) {
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if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
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if (Stmt *Body = FD->getBody())
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if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
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// Since function prototypes don't have ParmDecl's, we check the function
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// prototype. This enables us to rewrite function declarations and
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// definitions using the same code.
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RewriteBlocksInFunctionTypeProto(FD->getType(), FD);
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if (Stmt *Body = FD->getBody()) {
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CurFunctionDef = FD;
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FD->setBody(RewriteFunctionBodyOrGlobalInitializer(Body));
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// This synthesizes and inserts the block "impl" struct, invoke function,
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// and any copy/dispose helper functions.
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InsertBlockLiteralsWithinFunction(FD);
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CurFunctionDef = 0;
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}
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return;
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}
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if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
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if (Stmt *Body = MD->getBody()) {
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//Body->dump();
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CurMethodDecl = MD;
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CurMethodDef = MD;
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MD->setBody(RewriteFunctionBodyOrGlobalInitializer(Body));
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CurMethodDecl = 0;
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InsertBlockLiteralsWithinMethod(MD);
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CurMethodDef = 0;
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}
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}
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if (ObjCImplementationDecl *CI = dyn_cast<ObjCImplementationDecl>(D))
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@ -438,6 +565,54 @@ void RewriteObjC::HandleDeclInMainFile(Decl *D) {
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if (VD->getInit())
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RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
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}
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// Rewrite rules for blocks.
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if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
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if (isBlockPointerType(VD->getType())) {
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RewriteBlockPointerDecl(VD);
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if (VD->getInit()) {
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if (BlockExpr *CBE = dyn_cast<BlockExpr>(VD->getInit())) {
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RewriteFunctionBodyOrGlobalInitializer(CBE->getBody());
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// We've just rewritten the block body in place.
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// Now we snarf the rewritten text and stash it away for later use.
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std::string S = Rewrite.getRewritenText(CBE->getSourceRange());
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RewrittenBlockExprs[CBE] = S;
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std::string Init = SynthesizeBlockInitExpr(CBE, VD);
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// Do the rewrite, using S.size() which contains the rewritten size.
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ReplaceText(CBE->getLocStart(), S.size(), Init.c_str(), Init.size());
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SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
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} else if (CastExpr *CE = dyn_cast<CastExpr>(VD->getInit())) {
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RewriteCastExpr(CE);
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}
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}
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} else if (VD->getType()->isFunctionPointerType()) {
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CheckFunctionPointerDecl(VD->getType(), VD);
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if (VD->getInit()) {
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if (CastExpr *CE = dyn_cast<CastExpr>(VD->getInit())) {
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RewriteCastExpr(CE);
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}
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}
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}
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return;
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}
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if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) {
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if (isBlockPointerType(TD->getUnderlyingType()))
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RewriteBlockPointerDecl(TD);
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else if (TD->getUnderlyingType()->isFunctionPointerType())
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CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
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return;
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}
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if (RecordDecl *RD = dyn_cast<RecordDecl>(D)) {
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if (RD->isDefinition()) {
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for (RecordDecl::field_const_iterator i = RD->field_begin(),
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e = RD->field_end(); i != e; ++i) {
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FieldDecl *FD = *i;
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if (isBlockPointerType(FD->getType()))
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RewriteBlockPointerDecl(FD);
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}
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}
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return;
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}
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// Nothing yet.
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}
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@ -870,7 +1045,7 @@ void RewriteObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
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Stmt *RewriteObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV,
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SourceLocation OrigStart) {
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ObjCIvarDecl *D = IV->getDecl();
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if (CurMethodDecl) {
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if (CurMethodDef) {
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if (const PointerType *pType = IV->getBase()->getType()->getAsPointerType()) {
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ObjCInterfaceType *iFaceDecl = dyn_cast<ObjCInterfaceType>(pType->getPointeeType());
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// lookup which class implements the instance variable.
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@ -893,7 +1068,7 @@ Stmt *RewriteObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV,
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IV->getBase()->getLocEnd(),
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castExpr);
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if (IV->isFreeIvar() &&
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CurMethodDecl->getClassInterface() == iFaceDecl->getDecl()) {
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CurMethodDef->getClassInterface() == iFaceDecl->getDecl()) {
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MemberExpr *ME = new MemberExpr(PE, true, D, IV->getLocation(),
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D->getType());
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ReplaceStmt(IV, ME);
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@ -1032,6 +1207,25 @@ Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
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// precedes the first Decl. In the future the DeclGroup should have
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// a separate type-specifier that we can rewrite.
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RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
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// Blocks rewrite rules.
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for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
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DI != DE; ++DI) {
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ScopedDecl *SD = *DI;
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if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
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if (isBlockPointerType(ND->getType()))
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RewriteBlockPointerDecl(ND);
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else if (ND->getType()->isFunctionPointerType())
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CheckFunctionPointerDecl(ND->getType(), ND);
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}
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if (TypedefDecl *TD = dyn_cast<TypedefDecl>(SD)) {
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if (isBlockPointerType(TD->getUnderlyingType()))
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RewriteBlockPointerDecl(TD);
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else if (TD->getUnderlyingType()->isFunctionPointerType())
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CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
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}
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}
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}
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if (ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(S))
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@ -1045,6 +1239,18 @@ Stmt *RewriteObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
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&& "Statement stack mismatch");
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Stmts.pop_back();
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}
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// Handle blocks rewriting.
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if (BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(S)) {
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if (BDRE->isByRef())
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RewriteBlockDeclRefExpr(BDRE);
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}
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if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
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if (CE->getCallee()->getType()->isBlockPointerType())
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RewriteBlockCall(CE);
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}
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if (CastExpr *CE = dyn_cast<CastExpr>(S)) {
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RewriteCastExpr(CE);
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}
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#if 0
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if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
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CastExpr *Replacement = new CastExpr(ICE->getType(), ICE->getSubExpr(), SourceLocation());
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@ -1978,7 +2184,7 @@ Stmt *RewriteObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
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ObjCInterfaceDecl *RewriteObjC::isSuperReceiver(Expr *recExpr) {
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// check if we are sending a message to 'super'
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if (!CurMethodDecl || !CurMethodDecl->isInstance()) return 0;
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if (!CurMethodDef || !CurMethodDef->isInstance()) return 0;
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if (PredefinedExpr *PDE = dyn_cast<PredefinedExpr>(recExpr))
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if (PDE->getIdentType() == PredefinedExpr::ObjCSuper) {
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@ -2086,13 +2292,13 @@ Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp) {
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assert(MsgSendFlavor && "MsgSendFlavor is NULL!");
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ObjCInterfaceDecl *SuperDecl =
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CurMethodDecl->getClassInterface()->getSuperClass();
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CurMethodDef->getClassInterface()->getSuperClass();
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llvm::SmallVector<Expr*, 4> InitExprs;
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// set the receiver to self, the first argument to all methods.
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InitExprs.push_back(new DeclRefExpr(
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CurMethodDecl->getSelfDecl(),
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CurMethodDef->getSelfDecl(),
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Context->getObjCIdType(),
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SourceLocation()));
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llvm::SmallVector<Expr*, 8> ClsExprs;
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@ -2157,7 +2363,7 @@ Stmt *RewriteObjC::SynthMessageExpr(ObjCMessageExpr *Exp) {
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InitExprs.push_back(
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new ExplicitCastExpr(Context->getObjCIdType(),
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new DeclRefExpr(CurMethodDecl->getSelfDecl(),
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new DeclRefExpr(CurMethodDef->getSelfDecl(),
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Context->getObjCIdType(),
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SourceLocation()),
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SourceLocation())); // set the 'receiver'.
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@ -3229,6 +3435,627 @@ void RewriteObjC::RewriteImplementations(std::string &Result) {
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}
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}
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std::string RewriteObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
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const char *funcName,
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std::string Tag) {
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const FunctionType *AFT = CE->getFunctionType();
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QualType RT = AFT->getResultType();
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std::string StructRef = "struct " + Tag;
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std::string S = "static " + RT.getAsString() + " __" +
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funcName + "_" + "block_func_" + utostr(i);
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BlockDecl *BD = CE->getBlockDecl();
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if (isa<FunctionTypeNoProto>(AFT)) {
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S += "()";
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} else if (BD->param_empty()) {
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S += "(" + StructRef + " *__cself)";
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} else {
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const FunctionTypeProto *FT = cast<FunctionTypeProto>(AFT);
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assert(FT && "SynthesizeBlockFunc: No function proto");
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S += '(';
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// first add the implicit argument.
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S += StructRef + " *__cself, ";
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std::string ParamStr;
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for (BlockDecl::param_iterator AI = BD->param_begin(),
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E = BD->param_end(); AI != E; ++AI) {
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if (AI != BD->param_begin()) S += ", ";
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ParamStr = (*AI)->getName();
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(*AI)->getType().getAsStringInternal(ParamStr);
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S += ParamStr;
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}
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if (FT->isVariadic()) {
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if (!BD->param_empty()) S += ", ";
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S += "...";
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}
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S += ')';
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}
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S += " {\n";
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// Create local declarations to avoid rewriting all closure decl ref exprs.
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// First, emit a declaration for all "by ref" decls.
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for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
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E = BlockByRefDecls.end(); I != E; ++I) {
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S += " ";
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std::string Name = (*I)->getName();
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Context->getPointerType((*I)->getType()).getAsStringInternal(Name);
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S += Name + " = __cself->" + (*I)->getName() + "; // bound by ref\n";
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}
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// Next, emit a declaration for all "by copy" declarations.
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for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
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E = BlockByCopyDecls.end(); I != E; ++I) {
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S += " ";
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std::string Name = (*I)->getName();
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// Handle nested closure invocation. For example:
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//
|
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// void (^myImportedClosure)(void);
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// myImportedClosure = ^(void) { setGlobalInt(x + y); };
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//
|
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// void (^anotherClosure)(void);
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// anotherClosure = ^(void) {
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// myImportedClosure(); // import and invoke the closure
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// };
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//
|
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if (isBlockPointerType((*I)->getType()))
|
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S += "struct __block_impl *";
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else
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||||
(*I)->getType().getAsStringInternal(Name);
|
||||
S += Name + " = __cself->" + (*I)->getName() + "; // 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 RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
|
||||
const char *funcName,
|
||||
std::string Tag) {
|
||||
std::string StructRef = "struct " + Tag;
|
||||
std::string S = "static void __";
|
||||
|
||||
S += funcName;
|
||||
S += "_block_copy_" + utostr(i);
|
||||
S += "(" + StructRef;
|
||||
S += "*dst, " + StructRef;
|
||||
S += "*src) {";
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
|
||||
E = ImportedBlockDecls.end(); I != E; ++I) {
|
||||
S += "_Block_copy_assign(&dst->";
|
||||
S += (*I)->getName();
|
||||
S += ", src->";
|
||||
S += (*I)->getName();
|
||||
S += ");}";
|
||||
}
|
||||
S += "\nstatic void __";
|
||||
S += funcName;
|
||||
S += "_block_dispose_" + utostr(i);
|
||||
S += "(" + StructRef;
|
||||
S += "*src) {";
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
|
||||
E = ImportedBlockDecls.end(); I != E; ++I) {
|
||||
S += "_Block_destroy(src->";
|
||||
S += (*I)->getName();
|
||||
S += ");";
|
||||
}
|
||||
S += "}\n";
|
||||
return S;
|
||||
}
|
||||
|
||||
std::string RewriteObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
|
||||
bool hasCopyDisposeHelpers) {
|
||||
std::string S = "struct " + Tag;
|
||||
std::string Constructor = " " + Tag;
|
||||
|
||||
S += " {\n struct __block_impl impl;\n";
|
||||
|
||||
if (hasCopyDisposeHelpers)
|
||||
S += " void *copy;\n void *dispose;\n";
|
||||
|
||||
Constructor += "(void *fp";
|
||||
|
||||
if (hasCopyDisposeHelpers)
|
||||
Constructor += ", void *copyHelp, void *disposeHelp";
|
||||
|
||||
if (BlockDeclRefs.size()) {
|
||||
// Output all "by copy" declarations.
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
|
||||
E = BlockByCopyDecls.end(); I != E; ++I) {
|
||||
S += " ";
|
||||
std::string FieldName = (*I)->getName();
|
||||
std::string ArgName = "_" + FieldName;
|
||||
// Handle nested closure invocation. For example:
|
||||
//
|
||||
// void (^myImportedBlock)(void);
|
||||
// myImportedBlock = ^(void) { setGlobalInt(x + y); };
|
||||
//
|
||||
// void (^anotherBlock)(void);
|
||||
// anotherBlock = ^(void) {
|
||||
// myImportedBlock(); // import and invoke the closure
|
||||
// };
|
||||
//
|
||||
if (isBlockPointerType((*I)->getType())) {
|
||||
S += "struct __block_impl *";
|
||||
Constructor += ", void *" + ArgName;
|
||||
} else {
|
||||
(*I)->getType().getAsStringInternal(FieldName);
|
||||
(*I)->getType().getAsStringInternal(ArgName);
|
||||
Constructor += ", " + ArgName;
|
||||
}
|
||||
S += FieldName + ";\n";
|
||||
}
|
||||
// Output all "by ref" declarations.
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
|
||||
E = BlockByRefDecls.end(); I != E; ++I) {
|
||||
S += " ";
|
||||
std::string FieldName = (*I)->getName();
|
||||
std::string ArgName = "_" + FieldName;
|
||||
// Handle nested closure invocation. For example:
|
||||
//
|
||||
// void (^myImportedBlock)(void);
|
||||
// myImportedBlock = ^(void) { setGlobalInt(x + y); };
|
||||
//
|
||||
// void (^anotherBlock)(void);
|
||||
// anotherBlock = ^(void) {
|
||||
// myImportedBlock(); // import and invoke the closure
|
||||
// };
|
||||
//
|
||||
if (isBlockPointerType((*I)->getType())) {
|
||||
S += "struct __block_impl *";
|
||||
Constructor += ", void *" + ArgName;
|
||||
} else {
|
||||
Context->getPointerType((*I)->getType()).getAsStringInternal(FieldName);
|
||||
Context->getPointerType((*I)->getType()).getAsStringInternal(ArgName);
|
||||
Constructor += ", " + ArgName;
|
||||
}
|
||||
S += FieldName + "; // by ref\n";
|
||||
}
|
||||
// Finish writing the constructor.
|
||||
// FIXME: handle NSConcreteGlobalBlock.
|
||||
Constructor += ", int flags=0) {\n";
|
||||
Constructor += " impl.isa = 0/*&_NSConcreteStackBlock*/;\n impl.Size = sizeof(";
|
||||
Constructor += Tag + ");\n impl.Flags = flags;\n impl.FuncPtr = fp;\n";
|
||||
|
||||
if (hasCopyDisposeHelpers)
|
||||
Constructor += " copy = copyHelp;\n dispose = disposeHelp;\n";
|
||||
|
||||
// Initialize all "by copy" arguments.
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
|
||||
E = BlockByCopyDecls.end(); I != E; ++I) {
|
||||
std::string Name = (*I)->getName();
|
||||
Constructor += " ";
|
||||
if (isBlockPointerType((*I)->getType()))
|
||||
Constructor += Name + " = (struct __block_impl *)_";
|
||||
else
|
||||
Constructor += Name + " = _";
|
||||
Constructor += Name + ";\n";
|
||||
}
|
||||
// Initialize all "by ref" arguments.
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
|
||||
E = BlockByRefDecls.end(); I != E; ++I) {
|
||||
std::string Name = (*I)->getName();
|
||||
Constructor += " ";
|
||||
if (isBlockPointerType((*I)->getType()))
|
||||
Constructor += Name + " = (struct __block_impl *)_";
|
||||
else
|
||||
Constructor += Name + " = _";
|
||||
Constructor += Name + ";\n";
|
||||
}
|
||||
} else {
|
||||
// Finish writing the constructor.
|
||||
// FIXME: handle NSConcreteGlobalBlock.
|
||||
Constructor += ", int flags=0) {\n";
|
||||
Constructor += " impl.isa = 0/*&_NSConcreteStackBlock*/;\n impl.Size = sizeof(";
|
||||
Constructor += Tag + ");\n impl.Flags = flags;\n impl.FuncPtr = fp;\n";
|
||||
if (hasCopyDisposeHelpers)
|
||||
Constructor += " copy = copyHelp;\n dispose = disposeHelp;\n";
|
||||
}
|
||||
Constructor += " ";
|
||||
Constructor += "}\n";
|
||||
S += Constructor;
|
||||
S += "};\n";
|
||||
return S;
|
||||
}
|
||||
|
||||
void RewriteObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
|
||||
const char *FunName) {
|
||||
// Insert closures that were part of the function.
|
||||
for (unsigned i = 0; i < Blocks.size(); i++) {
|
||||
|
||||
CollectBlockDeclRefInfo(Blocks[i]);
|
||||
|
||||
std::string Tag = "__" + std::string(FunName) + "_block_impl_" + utostr(i);
|
||||
|
||||
std::string CI = SynthesizeBlockImpl(Blocks[i], Tag,
|
||||
ImportedBlockDecls.size() > 0);
|
||||
|
||||
InsertText(FunLocStart, CI.c_str(), CI.size());
|
||||
|
||||
std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, Tag);
|
||||
|
||||
InsertText(FunLocStart, CF.c_str(), CF.size());
|
||||
|
||||
if (ImportedBlockDecls.size()) {
|
||||
std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, Tag);
|
||||
InsertText(FunLocStart, HF.c_str(), HF.size());
|
||||
}
|
||||
|
||||
BlockDeclRefs.clear();
|
||||
BlockByRefDecls.clear();
|
||||
BlockByCopyDecls.clear();
|
||||
BlockCallExprs.clear();
|
||||
ImportedBlockDecls.clear();
|
||||
}
|
||||
Blocks.clear();
|
||||
RewrittenBlockExprs.clear();
|
||||
}
|
||||
|
||||
void RewriteObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
|
||||
SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
|
||||
const char *FuncName = FD->getName();
|
||||
|
||||
SynthesizeBlockLiterals(FunLocStart, FuncName);
|
||||
}
|
||||
|
||||
void RewriteObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
|
||||
SourceLocation FunLocStart = MD->getLocStart();
|
||||
std::string FuncName = std::string(MD->getSelector().getName());
|
||||
// Convert colons to underscores.
|
||||
std::string::size_type loc = 0;
|
||||
while ((loc = FuncName.find(":", loc)) != std::string::npos)
|
||||
FuncName.replace(loc, 1, "_");
|
||||
|
||||
SynthesizeBlockLiterals(FunLocStart, FuncName.c_str());
|
||||
}
|
||||
|
||||
void RewriteObjC::GetBlockDeclRefExprs(Stmt *S) {
|
||||
for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
|
||||
CI != E; ++CI)
|
||||
if (*CI) {
|
||||
if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI))
|
||||
GetBlockDeclRefExprs(CBE->getBody());
|
||||
else
|
||||
GetBlockDeclRefExprs(*CI);
|
||||
}
|
||||
// Handle specific things.
|
||||
if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(S))
|
||||
// FIXME: Handle enums.
|
||||
if (!isa<FunctionDecl>(CDRE->getDecl()))
|
||||
BlockDeclRefs.push_back(CDRE);
|
||||
return;
|
||||
}
|
||||
|
||||
void RewriteObjC::GetBlockCallExprs(Stmt *S) {
|
||||
for (Stmt::child_iterator CI = S->child_begin(), E = S->child_end();
|
||||
CI != E; ++CI)
|
||||
if (*CI) {
|
||||
if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI))
|
||||
GetBlockCallExprs(CBE->getBody());
|
||||
else
|
||||
GetBlockCallExprs(*CI);
|
||||
}
|
||||
|
||||
if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
|
||||
if (CE->getCallee()->getType()->isBlockPointerType()) {
|
||||
BlockCallExprs[dyn_cast<BlockDeclRefExpr>(CE->getCallee())] = CE;
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
std::string RewriteObjC::SynthesizeBlockCall(CallExpr *Exp) {
|
||||
// Navigate to relevant type information.
|
||||
const char *closureName = 0;
|
||||
const BlockPointerType *CPT = 0;
|
||||
|
||||
if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Exp->getCallee())) {
|
||||
closureName = DRE->getDecl()->getName();
|
||||
CPT = DRE->getType()->getAsBlockPointerType();
|
||||
} else if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(Exp->getCallee())) {
|
||||
closureName = CDRE->getDecl()->getName();
|
||||
CPT = CDRE->getType()->getAsBlockPointerType();
|
||||
} else if (MemberExpr *MExpr = dyn_cast<MemberExpr>(Exp->getCallee())) {
|
||||
closureName = MExpr->getMemberDecl()->getName();
|
||||
CPT = MExpr->getType()->getAsBlockPointerType();
|
||||
} else {
|
||||
assert(1 && "RewriteBlockClass: Bad type");
|
||||
}
|
||||
assert(CPT && "RewriteBlockClass: Bad type");
|
||||
const FunctionType *FT = CPT->getPointeeType()->getAsFunctionType();
|
||||
assert(FT && "RewriteBlockClass: Bad type");
|
||||
const FunctionTypeProto *FTP = dyn_cast<FunctionTypeProto>(FT);
|
||||
// FTP will be null for closures that don't take arguments.
|
||||
|
||||
// Build a closure call - start with a paren expr to enforce precedence.
|
||||
std::string BlockCall = "(";
|
||||
|
||||
// Synthesize the cast.
|
||||
BlockCall += "(" + Exp->getType().getAsString() + "(*)";
|
||||
BlockCall += "(struct __block_impl *";
|
||||
if (FTP) {
|
||||
for (FunctionTypeProto::arg_type_iterator I = FTP->arg_type_begin(),
|
||||
E = FTP->arg_type_end(); I && (I != E); ++I)
|
||||
BlockCall += ", " + (*I).getAsString();
|
||||
}
|
||||
BlockCall += "))"; // close the argument list and paren expression.
|
||||
|
||||
// Invoke the closure. We need to cast it since the declaration type is
|
||||
// bogus (it's a function pointer type)
|
||||
BlockCall += "((struct __block_impl *)";
|
||||
std::string closureExprBufStr;
|
||||
llvm::raw_string_ostream closureExprBuf(closureExprBufStr);
|
||||
Exp->getCallee()->printPretty(closureExprBuf);
|
||||
BlockCall += closureExprBuf.str();
|
||||
BlockCall += ")->FuncPtr)";
|
||||
|
||||
// Add the arguments.
|
||||
BlockCall += "((struct __block_impl *)";
|
||||
BlockCall += closureExprBuf.str();
|
||||
for (CallExpr::arg_iterator I = Exp->arg_begin(),
|
||||
E = Exp->arg_end(); I != E; ++I) {
|
||||
std::string syncExprBufS;
|
||||
llvm::raw_string_ostream Buf(syncExprBufS);
|
||||
(*I)->printPretty(Buf);
|
||||
BlockCall += ", " + Buf.str();
|
||||
}
|
||||
return BlockCall;
|
||||
}
|
||||
|
||||
void RewriteObjC::RewriteBlockCall(CallExpr *Exp) {
|
||||
std::string BlockCall = SynthesizeBlockCall(Exp);
|
||||
|
||||
const char *startBuf = SM->getCharacterData(Exp->getLocStart());
|
||||
const char *endBuf = SM->getCharacterData(Exp->getLocEnd());
|
||||
|
||||
ReplaceText(Exp->getLocStart(), endBuf-startBuf,
|
||||
BlockCall.c_str(), BlockCall.size());
|
||||
}
|
||||
|
||||
void RewriteObjC::RewriteBlockDeclRefExpr(BlockDeclRefExpr *BDRE) {
|
||||
// FIXME: Add more elaborate code generation required by the ABI.
|
||||
InsertText(BDRE->getLocStart(), "*", 1);
|
||||
}
|
||||
|
||||
void RewriteObjC::RewriteCastExpr(CastExpr *CE) {
|
||||
SourceLocation LocStart = CE->getLocStart();
|
||||
SourceLocation LocEnd = CE->getLocEnd();
|
||||
|
||||
const char *startBuf = SM->getCharacterData(LocStart);
|
||||
const char *endBuf = SM->getCharacterData(LocEnd);
|
||||
|
||||
// advance the location to startArgList.
|
||||
const char *argPtr = startBuf;
|
||||
|
||||
while (*argPtr++ && (argPtr < endBuf)) {
|
||||
switch (*argPtr) {
|
||||
case '^':
|
||||
// Replace the '^' with '*'.
|
||||
LocStart = LocStart.getFileLocWithOffset(argPtr-startBuf);
|
||||
ReplaceText(LocStart, 1, "*", 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
void RewriteObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
|
||||
SourceLocation DeclLoc = FD->getLocation();
|
||||
unsigned parenCount = 0;
|
||||
|
||||
// We have 1 or more arguments that have closure pointers.
|
||||
const char *startBuf = SM->getCharacterData(DeclLoc);
|
||||
const char *startArgList = strchr(startBuf, '(');
|
||||
|
||||
assert((*startArgList == '(') && "Rewriter fuzzy parser confused");
|
||||
|
||||
parenCount++;
|
||||
// advance the location to startArgList.
|
||||
DeclLoc = DeclLoc.getFileLocWithOffset(startArgList-startBuf);
|
||||
assert((DeclLoc.isValid()) && "Invalid DeclLoc");
|
||||
|
||||
const char *argPtr = startArgList;
|
||||
|
||||
while (*argPtr++ && parenCount) {
|
||||
switch (*argPtr) {
|
||||
case '^':
|
||||
// Replace the '^' with '*'.
|
||||
DeclLoc = DeclLoc.getFileLocWithOffset(argPtr-startArgList);
|
||||
ReplaceText(DeclLoc, 1, "*", 1);
|
||||
break;
|
||||
case '(':
|
||||
parenCount++;
|
||||
break;
|
||||
case ')':
|
||||
parenCount--;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
bool RewriteObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
|
||||
const FunctionTypeProto *FTP;
|
||||
const PointerType *PT = QT->getAsPointerType();
|
||||
if (PT) {
|
||||
FTP = PT->getPointeeType()->getAsFunctionTypeProto();
|
||||
} else {
|
||||
const BlockPointerType *BPT = QT->getAsBlockPointerType();
|
||||
assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type");
|
||||
FTP = BPT->getPointeeType()->getAsFunctionTypeProto();
|
||||
}
|
||||
if (FTP) {
|
||||
for (FunctionTypeProto::arg_type_iterator I = FTP->arg_type_begin(),
|
||||
E = FTP->arg_type_end(); I != E; ++I)
|
||||
if (isBlockPointerType(*I))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
void RewriteObjC::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 RewriteObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
|
||||
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
|
||||
RewriteBlockPointerFunctionArgs(FD);
|
||||
return;
|
||||
}
|
||||
// Handle Variables and Typedefs.
|
||||
SourceLocation DeclLoc = ND->getLocation();
|
||||
QualType DeclT;
|
||||
if (VarDecl *VD = dyn_cast<VarDecl>(ND))
|
||||
DeclT = VD->getType();
|
||||
else if (TypedefDecl *TDD = dyn_cast<TypedefDecl>(ND))
|
||||
DeclT = TDD->getUnderlyingType();
|
||||
else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
|
||||
DeclT = FD->getType();
|
||||
else
|
||||
assert(0 && "RewriteBlockPointerDecl(): Decl type not yet handled");
|
||||
|
||||
const char *startBuf = SM->getCharacterData(DeclLoc);
|
||||
const char *endBuf = startBuf;
|
||||
// scan backward (from the decl location) for the end of the previous decl.
|
||||
while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
|
||||
startBuf--;
|
||||
|
||||
// *startBuf != '^' if we are dealing with a pointer to function that
|
||||
// may take block argument types (which will be handled below).
|
||||
if (*startBuf == '^') {
|
||||
// Replace the '^' with '*', computing a negative offset.
|
||||
DeclLoc = DeclLoc.getFileLocWithOffset(startBuf-endBuf);
|
||||
ReplaceText(DeclLoc, 1, "*", 1);
|
||||
}
|
||||
if (PointerTypeTakesAnyBlockArguments(DeclT)) {
|
||||
// Replace the '^' with '*' for arguments.
|
||||
DeclLoc = ND->getLocation();
|
||||
startBuf = SM->getCharacterData(DeclLoc);
|
||||
const char *argListBegin, *argListEnd;
|
||||
GetExtentOfArgList(startBuf, argListBegin, argListEnd);
|
||||
while (argListBegin < argListEnd) {
|
||||
if (*argListBegin == '^') {
|
||||
SourceLocation CaretLoc = DeclLoc.getFileLocWithOffset(argListBegin-startBuf);
|
||||
ReplaceText(CaretLoc, 1, "*", 1);
|
||||
}
|
||||
argListBegin++;
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
void RewriteObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
|
||||
// Add initializers for any closure decl refs.
|
||||
GetBlockDeclRefExprs(Exp->getBody());
|
||||
if (BlockDeclRefs.size()) {
|
||||
// Unique all "by copy" declarations.
|
||||
for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
|
||||
if (!BlockDeclRefs[i]->isByRef())
|
||||
BlockByCopyDecls.insert(BlockDeclRefs[i]->getDecl());
|
||||
// Unique all "by ref" declarations.
|
||||
for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
|
||||
if (BlockDeclRefs[i]->isByRef()) {
|
||||
BlockByRefDecls.insert(BlockDeclRefs[i]->getDecl());
|
||||
}
|
||||
// Find any imported blocks...they will need special attention.
|
||||
for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
|
||||
if (isBlockPointerType(BlockDeclRefs[i]->getType())) {
|
||||
GetBlockCallExprs(Blocks[i]);
|
||||
ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
std::string RewriteObjC::SynthesizeBlockInitExpr(BlockExpr *Exp, VarDecl *VD) {
|
||||
Blocks.push_back(Exp);
|
||||
|
||||
CollectBlockDeclRefInfo(Exp);
|
||||
std::string FuncName;
|
||||
|
||||
if (CurFunctionDef)
|
||||
FuncName = std::string(CurFunctionDef->getName());
|
||||
else if (CurMethodDef) {
|
||||
FuncName = std::string(CurMethodDef->getSelector().getName());
|
||||
// Convert colons to underscores.
|
||||
std::string::size_type loc = 0;
|
||||
while ((loc = FuncName.find(":", loc)) != std::string::npos)
|
||||
FuncName.replace(loc, 1, "_");
|
||||
} else if (VD)
|
||||
FuncName = std::string(VD->getName());
|
||||
|
||||
std::string BlockNumber = utostr(Blocks.size()-1);
|
||||
|
||||
std::string Tag = "__" + FuncName + "_block_impl_" + BlockNumber;
|
||||
std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
|
||||
|
||||
std::string FunkTypeStr;
|
||||
|
||||
// Get a pointer to the function type so we can cast appropriately.
|
||||
Context->getPointerType(QualType(Exp->getFunctionType(),0)).getAsStringInternal(FunkTypeStr);
|
||||
|
||||
// Rewrite the closure block with a compound literal. The first cast is
|
||||
// to prevent warnings from the C compiler.
|
||||
std::string Init = "(" + FunkTypeStr;
|
||||
|
||||
Init += ")&" + Tag;
|
||||
|
||||
// Initialize the block function.
|
||||
Init += "((void*)" + Func;
|
||||
|
||||
if (ImportedBlockDecls.size()) {
|
||||
std::string Buf = "__" + FuncName + "_block_copy_" + BlockNumber;
|
||||
Init += ",(void*)" + Buf;
|
||||
Buf = "__" + FuncName + "_block_dispose_" + BlockNumber;
|
||||
Init += ",(void*)" + Buf;
|
||||
}
|
||||
// Add initializers for any closure decl refs.
|
||||
if (BlockDeclRefs.size()) {
|
||||
// Output all "by copy" declarations.
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByCopyDecls.begin(),
|
||||
E = BlockByCopyDecls.end(); I != E; ++I) {
|
||||
Init += ",";
|
||||
if (isObjCType((*I)->getType())) {
|
||||
Init += "[[";
|
||||
Init += (*I)->getName();
|
||||
Init += " retain] autorelease]";
|
||||
} else if (isBlockPointerType((*I)->getType())) {
|
||||
Init += "(void *)";
|
||||
Init += (*I)->getName();
|
||||
} else {
|
||||
Init += (*I)->getName();
|
||||
}
|
||||
}
|
||||
// Output all "by ref" declarations.
|
||||
for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = BlockByRefDecls.begin(),
|
||||
E = BlockByRefDecls.end(); I != E; ++I) {
|
||||
Init += ",&";
|
||||
Init += (*I)->getName();
|
||||
}
|
||||
}
|
||||
Init += ")";
|
||||
BlockDeclRefs.clear();
|
||||
BlockByRefDecls.clear();
|
||||
BlockByCopyDecls.clear();
|
||||
ImportedBlockDecls.clear();
|
||||
|
||||
return Init;
|
||||
}
|
||||
|
||||
|
|
|
|||
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