| //===------- CGObjCMac.cpp - Interface to Apple Objective-C Runtime -------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This provides Objective-C code generation targetting the Apple runtime. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CGObjCRuntime.h" |
| |
| #include "CodeGenModule.h" |
| #include "CodeGenFunction.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/Decl.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/Basic/LangOptions.h" |
| |
| #include "llvm/Module.h" |
| #include "llvm/Support/IRBuilder.h" |
| #include "llvm/Target/TargetData.h" |
| #include <sstream> |
| |
| using namespace clang; |
| using namespace CodeGen; |
| |
| namespace { |
| |
| typedef std::vector<llvm::Constant*> ConstantVector; |
| |
| // FIXME: We should find a nicer way to make the labels for |
| // metadata, string concatenation is lame. |
| |
| /// ObjCTypesHelper - Helper class that encapsulates lazy |
| /// construction of varies types used during ObjC generation. |
| class ObjCTypesHelper { |
| private: |
| CodeGen::CodeGenModule &CGM; |
| |
| llvm::Function *MessageSendFn, *MessageSendStretFn; |
| llvm::Function *MessageSendSuperFn, *MessageSendSuperStretFn; |
| |
| public: |
| const llvm::Type *ShortTy, *IntTy, *LongTy; |
| const llvm::Type *Int8PtrTy; |
| |
| /// ObjectPtrTy - LLVM type for object handles (typeof(id)) |
| const llvm::Type *ObjectPtrTy; |
| /// SelectorPtrTy - LLVM type for selector handles (typeof(SEL)) |
| const llvm::Type *SelectorPtrTy; |
| /// ProtocolPtrTy - LLVM type for external protocol handles |
| /// (typeof(Protocol)) |
| const llvm::Type *ExternalProtocolPtrTy; |
| |
| // SuperCTy - clang type for struct objc_super. |
| QualType SuperCTy; |
| // SuperPtrCTy - clang type for struct objc_super *. |
| QualType SuperPtrCTy; |
| |
| /// SuperTy - LLVM type for struct objc_super. |
| const llvm::StructType *SuperTy; |
| /// SuperPtrTy - LLVM type for struct objc_super *. |
| const llvm::Type *SuperPtrTy; |
| |
| /// SymtabTy - LLVM type for struct objc_symtab. |
| const llvm::StructType *SymtabTy; |
| /// SymtabPtrTy - LLVM type for struct objc_symtab *. |
| const llvm::Type *SymtabPtrTy; |
| /// ModuleTy - LLVM type for struct objc_module. |
| const llvm::StructType *ModuleTy; |
| |
| /// ProtocolTy - LLVM type for struct objc_protocol. |
| const llvm::StructType *ProtocolTy; |
| /// ProtocolPtrTy - LLVM type for struct objc_protocol *. |
| const llvm::Type *ProtocolPtrTy; |
| /// ProtocolExtensionTy - LLVM type for struct |
| /// objc_protocol_extension. |
| const llvm::StructType *ProtocolExtensionTy; |
| /// ProtocolExtensionTy - LLVM type for struct |
| /// objc_protocol_extension *. |
| const llvm::Type *ProtocolExtensionPtrTy; |
| /// MethodDescriptionTy - LLVM type for struct |
| /// objc_method_description. |
| const llvm::StructType *MethodDescriptionTy; |
| /// MethodDescriptionListTy - LLVM type for struct |
| /// objc_method_description_list. |
| const llvm::StructType *MethodDescriptionListTy; |
| /// MethodDescriptionListPtrTy - LLVM type for struct |
| /// objc_method_description_list *. |
| const llvm::Type *MethodDescriptionListPtrTy; |
| /// PropertyTy - LLVM type for struct objc_property (struct _prop_t |
| /// in GCC parlance). |
| const llvm::StructType *PropertyTy; |
| /// PropertyListTy - LLVM type for struct objc_property_list |
| /// (_prop_list_t in GCC parlance). |
| const llvm::StructType *PropertyListTy; |
| /// PropertyListPtrTy - LLVM type for struct objc_property_list*. |
| const llvm::Type *PropertyListPtrTy; |
| /// ProtocolListTy - LLVM type for struct objc_property_list. |
| const llvm::Type *ProtocolListTy; |
| /// ProtocolListPtrTy - LLVM type for struct objc_property_list*. |
| const llvm::Type *ProtocolListPtrTy; |
| /// CategoryTy - LLVM type for struct objc_category. |
| const llvm::StructType *CategoryTy; |
| /// ClassTy - LLVM type for struct objc_class. |
| const llvm::StructType *ClassTy; |
| /// ClassPtrTy - LLVM type for struct objc_class *. |
| const llvm::Type *ClassPtrTy; |
| /// ClassExtensionTy - LLVM type for struct objc_class_ext. |
| const llvm::StructType *ClassExtensionTy; |
| /// ClassExtensionPtrTy - LLVM type for struct objc_class_ext *. |
| const llvm::Type *ClassExtensionPtrTy; |
| /// CacheTy - LLVM type for struct objc_cache. |
| const llvm::Type *CacheTy; |
| /// CachePtrTy - LLVM type for struct objc_cache *. |
| const llvm::Type *CachePtrTy; |
| // IvarTy - LLVM type for struct objc_ivar. |
| const llvm::StructType *IvarTy; |
| /// IvarListTy - LLVM type for struct objc_ivar_list. |
| const llvm::Type *IvarListTy; |
| /// IvarListPtrTy - LLVM type for struct objc_ivar_list *. |
| const llvm::Type *IvarListPtrTy; |
| // MethodTy - LLVM type for struct objc_method. |
| const llvm::StructType *MethodTy; |
| /// MethodListTy - LLVM type for struct objc_method_list. |
| const llvm::Type *MethodListTy; |
| /// MethodListPtrTy - LLVM type for struct objc_method_list *. |
| const llvm::Type *MethodListPtrTy; |
| |
| llvm::Function *GetPropertyFn, *SetPropertyFn; |
| llvm::Function *EnumerationMutationFn; |
| |
| /// ExceptionDataTy - LLVM type for struct _objc_exception_data. |
| const llvm::Type *ExceptionDataTy; |
| |
| /// ExceptionThrowFn - LLVM objc_exception_throw function. |
| llvm::Function *ExceptionThrowFn; |
| |
| /// ExceptionTryEnterFn - LLVM objc_exception_try_enter function. |
| llvm::Function *ExceptionTryEnterFn; |
| |
| /// ExceptionTryExitFn - LLVM objc_exception_try_exit function. |
| llvm::Function *ExceptionTryExitFn; |
| |
| /// ExceptionExtractFn - LLVM objc_exception_extract function. |
| llvm::Function *ExceptionExtractFn; |
| |
| /// ExceptionMatchFn - LLVM objc_exception_match function. |
| llvm::Function *ExceptionMatchFn; |
| |
| /// SetJmpFn - LLVM _setjmp function. |
| llvm::Function *SetJmpFn; |
| |
| public: |
| ObjCTypesHelper(CodeGen::CodeGenModule &cgm); |
| ~ObjCTypesHelper(); |
| |
| llvm::Constant *getMessageSendFn(bool IsSuper, bool isStret); |
| }; |
| |
| class CGObjCMac : public CodeGen::CGObjCRuntime { |
| private: |
| CodeGen::CodeGenModule &CGM; |
| ObjCTypesHelper ObjCTypes; |
| /// ObjCABI - FIXME: Not sure yet. |
| unsigned ObjCABI; |
| |
| /// LazySymbols - Symbols to generate a lazy reference for. See |
| /// DefinedSymbols and FinishModule(). |
| std::set<IdentifierInfo*> LazySymbols; |
| |
| /// DefinedSymbols - External symbols which are defined by this |
| /// module. The symbols in this list and LazySymbols are used to add |
| /// special linker symbols which ensure that Objective-C modules are |
| /// linked properly. |
| std::set<IdentifierInfo*> DefinedSymbols; |
| |
| /// ClassNames - uniqued class names. |
| llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> ClassNames; |
| |
| /// MethodVarNames - uniqued method variable names. |
| llvm::DenseMap<Selector, llvm::GlobalVariable*> MethodVarNames; |
| |
| /// MethodVarTypes - uniqued method type signatures. We have to use |
| /// a StringMap here because have no other unique reference. |
| llvm::StringMap<llvm::GlobalVariable*> MethodVarTypes; |
| |
| /// MethodDefinitions - map of methods which have been defined in |
| /// this translation unit. |
| llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*> MethodDefinitions; |
| |
| /// PropertyNames - uniqued method variable names. |
| llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> PropertyNames; |
| |
| /// ClassReferences - uniqued class references. |
| llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> ClassReferences; |
| |
| /// SelectorReferences - uniqued selector references. |
| llvm::DenseMap<Selector, llvm::GlobalVariable*> SelectorReferences; |
| |
| /// Protocols - Protocols for which an objc_protocol structure has |
| /// been emitted. Forward declarations are handled by creating an |
| /// empty structure whose initializer is filled in when/if defined. |
| llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> Protocols; |
| |
| /// DefinedClasses - List of defined classes. |
| std::vector<llvm::GlobalValue*> DefinedClasses; |
| |
| /// DefinedCategories - List of defined categories. |
| std::vector<llvm::GlobalValue*> DefinedCategories; |
| |
| /// UsedGlobals - List of globals to pack into the llvm.used metadata |
| /// to prevent them from being clobbered. |
| std::vector<llvm::GlobalVariable*> UsedGlobals; |
| |
| /// EmitImageInfo - Emit the image info marker used to encode some module |
| /// level information. |
| void EmitImageInfo(); |
| |
| /// EmitModuleInfo - Another marker encoding module level |
| /// information. |
| void EmitModuleInfo(); |
| |
| /// EmitModuleSymols - Emit module symbols, the list of defined |
| /// classes and categories. The result has type SymtabPtrTy. |
| llvm::Constant *EmitModuleSymbols(); |
| |
| /// FinishModule - Write out global data structures at the end of |
| /// processing a translation unit. |
| void FinishModule(); |
| |
| /// EmitClassExtension - Generate the class extension structure used |
| /// to store the weak ivar layout and properties. The return value |
| /// has type ClassExtensionPtrTy. |
| llvm::Constant *EmitClassExtension(const ObjCImplementationDecl *ID); |
| |
| /// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy, |
| /// for the given class. |
| llvm::Value *EmitClassRef(llvm::IRBuilder<> &Builder, |
| const ObjCInterfaceDecl *ID); |
| |
| CodeGen::RValue EmitMessageSend(CodeGen::CodeGenFunction &CGF, |
| QualType ResultType, |
| Selector Sel, |
| llvm::Value *Arg0, |
| QualType Arg0Ty, |
| bool IsSuper, |
| const CallArgList &CallArgs); |
| |
| /// EmitIvarList - Emit the ivar list for the given |
| /// implementation. If ForClass is true the list of class ivars |
| /// (i.e. metaclass ivars) is emitted, otherwise the list of |
| /// interface ivars will be emitted. The return value has type |
| /// IvarListPtrTy. |
| llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID, |
| bool ForClass, |
| const llvm::Type *InterfaceTy); |
| |
| /// EmitMetaClass - Emit a forward reference to the class structure |
| /// for the metaclass of the given interface. The return value has |
| /// type ClassPtrTy. |
| llvm::Constant *EmitMetaClassRef(const ObjCInterfaceDecl *ID); |
| |
| /// EmitMetaClass - Emit a class structure for the metaclass of the |
| /// given implementation. The return value has type ClassPtrTy. |
| llvm::Constant *EmitMetaClass(const ObjCImplementationDecl *ID, |
| llvm::Constant *Protocols, |
| const llvm::Type *InterfaceTy, |
| const ConstantVector &Methods); |
| |
| llvm::Constant *GetMethodConstant(const ObjCMethodDecl *MD); |
| |
| llvm::Constant *GetMethodDescriptionConstant(const ObjCMethodDecl *MD); |
| |
| /// EmitMethodList - Emit the method list for the given |
| /// implementation. The return value has type MethodListPtrTy. |
| llvm::Constant *EmitMethodList(const std::string &Name, |
| const char *Section, |
| const ConstantVector &Methods); |
| |
| /// EmitMethodDescList - Emit a method description list for a list of |
| /// method declarations. |
| /// - TypeName: The name for the type containing the methods. |
| /// - IsProtocol: True iff these methods are for a protocol. |
| /// - ClassMethds: True iff these are class methods. |
| /// - Required: When true, only "required" methods are |
| /// listed. Similarly, when false only "optional" methods are |
| /// listed. For classes this should always be true. |
| /// - begin, end: The method list to output. |
| /// |
| /// The return value has type MethodDescriptionListPtrTy. |
| llvm::Constant *EmitMethodDescList(const std::string &Name, |
| const char *Section, |
| const ConstantVector &Methods); |
| |
| /// EmitPropertyList - Emit the given property list. The return |
| /// value has type PropertyListPtrTy. |
| llvm::Constant *EmitPropertyList(const std::string &Name, |
| const Decl *Container, |
| ObjCPropertyDecl * const *begin, |
| ObjCPropertyDecl * const *end); |
| |
| /// EmitProtocolExtension - Generate the protocol extension |
| /// structure used to store optional instance and class methods, and |
| /// protocol properties. The return value has type |
| /// ProtocolExtensionPtrTy. |
| llvm::Constant * |
| EmitProtocolExtension(const ObjCProtocolDecl *PD, |
| const ConstantVector &OptInstanceMethods, |
| const ConstantVector &OptClassMethods); |
| |
| /// EmitProtocolList - Generate the list of referenced |
| /// protocols. The return value has type ProtocolListPtrTy. |
| llvm::Constant *EmitProtocolList(const std::string &Name, |
| ObjCProtocolDecl::protocol_iterator begin, |
| ObjCProtocolDecl::protocol_iterator end); |
| |
| /// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy, |
| /// for the given selector. |
| llvm::Value *EmitSelector(llvm::IRBuilder<> &Builder, Selector Sel); |
| |
| /// GetProtocolRef - Return a reference to the internal protocol |
| /// description, creating an empty one if it has not been |
| /// defined. The return value has type pointer-to ProtocolTy. |
| llvm::GlobalVariable *GetProtocolRef(const ObjCProtocolDecl *PD); |
| |
| /// GetClassName - Return a unique constant for the given selector's |
| /// name. The return value has type char *. |
| llvm::Constant *GetClassName(IdentifierInfo *Ident); |
| |
| /// GetMethodVarName - Return a unique constant for the given |
| /// selector's name. The return value has type char *. |
| llvm::Constant *GetMethodVarName(Selector Sel); |
| llvm::Constant *GetMethodVarName(IdentifierInfo *Ident); |
| llvm::Constant *GetMethodVarName(const std::string &Name); |
| |
| /// GetMethodVarType - Return a unique constant for the given |
| /// selector's name. The return value has type char *. |
| |
| // FIXME: This is a horrible name. |
| llvm::Constant *GetMethodVarType(const ObjCMethodDecl *D); |
| llvm::Constant *GetMethodVarType(const std::string &Name); |
| |
| /// GetPropertyName - Return a unique constant for the given |
| /// name. The return value has type char *. |
| llvm::Constant *GetPropertyName(IdentifierInfo *Ident); |
| |
| // FIXME: This can be dropped once string functions are unified. |
| llvm::Constant *GetPropertyTypeString(const ObjCPropertyDecl *PD, |
| const Decl *Container); |
| |
| /// GetNameForMethod - Return a name for the given method. |
| /// \param[out] NameOut - The return value. |
| void GetNameForMethod(const ObjCMethodDecl *OMD, |
| std::string &NameOut); |
| |
| public: |
| CGObjCMac(CodeGen::CodeGenModule &cgm); |
| virtual llvm::Constant *GenerateConstantString(const std::string &String); |
| |
| virtual CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
| QualType ResultType, |
| Selector Sel, |
| llvm::Value *Receiver, |
| bool IsClassMessage, |
| const CallArgList &CallArgs); |
| |
| virtual CodeGen::RValue |
| GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
| QualType ResultType, |
| Selector Sel, |
| const ObjCInterfaceDecl *Class, |
| llvm::Value *Receiver, |
| bool IsClassMessage, |
| const CallArgList &CallArgs); |
| |
| virtual llvm::Value *GetClass(llvm::IRBuilder<> &Builder, |
| const ObjCInterfaceDecl *ID); |
| |
| virtual llvm::Value *GetSelector(llvm::IRBuilder<> &Builder, Selector Sel); |
| |
| virtual llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD); |
| |
| virtual void GenerateCategory(const ObjCCategoryImplDecl *CMD); |
| |
| virtual void GenerateClass(const ObjCImplementationDecl *ClassDecl); |
| |
| virtual llvm::Value *GenerateProtocolRef(llvm::IRBuilder<> &Builder, |
| const ObjCProtocolDecl *PD); |
| |
| virtual void GenerateProtocol(const ObjCProtocolDecl *PD); |
| |
| virtual llvm::Function *ModuleInitFunction(); |
| virtual llvm::Function *GetPropertyGetFunction(); |
| virtual llvm::Function *GetPropertySetFunction(); |
| virtual llvm::Function *EnumerationMutationFunction(); |
| |
| virtual void EmitTryStmt(CodeGen::CodeGenFunction &CGF, |
| const ObjCAtTryStmt &S); |
| virtual void EmitThrowStmt(CodeGen::CodeGenFunction &CGF, |
| const ObjCAtThrowStmt &S); |
| |
| }; |
| } // end anonymous namespace |
| |
| /* *** Helper Functions *** */ |
| |
| /// getConstantGEP() - Help routine to construct simple GEPs. |
| static llvm::Constant *getConstantGEP(llvm::Constant *C, |
| unsigned idx0, |
| unsigned idx1) { |
| llvm::Value *Idxs[] = { |
| llvm::ConstantInt::get(llvm::Type::Int32Ty, idx0), |
| llvm::ConstantInt::get(llvm::Type::Int32Ty, idx1) |
| }; |
| return llvm::ConstantExpr::getGetElementPtr(C, Idxs, 2); |
| } |
| |
| /* *** CGObjCMac Public Interface *** */ |
| |
| CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) |
| : CGM(cgm), |
| ObjCTypes(cgm), |
| ObjCABI(1) |
| { |
| // FIXME: How does this get set in GCC? And what does it even mean? |
| if (ObjCTypes.LongTy != CGM.getTypes().ConvertType(CGM.getContext().IntTy)) |
| ObjCABI = 2; |
| |
| EmitImageInfo(); |
| } |
| |
| /// GetClass - Return a reference to the class for the given interface |
| /// decl. |
| llvm::Value *CGObjCMac::GetClass(llvm::IRBuilder<> &Builder, |
| const ObjCInterfaceDecl *ID) { |
| return EmitClassRef(Builder, ID); |
| } |
| |
| /// GetSelector - Return the pointer to the unique'd string for this selector. |
| llvm::Value *CGObjCMac::GetSelector(llvm::IRBuilder<> &Builder, Selector Sel) { |
| return EmitSelector(Builder, Sel); |
| } |
| |
| /// Generate a constant CFString object. |
| /* |
| struct __builtin_CFString { |
| const int *isa; // point to __CFConstantStringClassReference |
| int flags; |
| const char *str; |
| long length; |
| }; |
| */ |
| |
| llvm::Constant *CGObjCMac::GenerateConstantString(const std::string &String) { |
| return CGM.GetAddrOfConstantCFString(String); |
| } |
| |
| /// Generates a message send where the super is the receiver. This is |
| /// a message send to self with special delivery semantics indicating |
| /// which class's method should be called. |
| CodeGen::RValue |
| CGObjCMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
| QualType ResultType, |
| Selector Sel, |
| const ObjCInterfaceDecl *Class, |
| llvm::Value *Receiver, |
| bool IsClassMessage, |
| const CodeGen::CallArgList &CallArgs) { |
| // Create and init a super structure; this is a (receiver, class) |
| // pair we will pass to objc_msgSendSuper. |
| llvm::Value *ObjCSuper = |
| CGF.Builder.CreateAlloca(ObjCTypes.SuperTy, 0, "objc_super"); |
| llvm::Value *ReceiverAsObject = |
| CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy); |
| CGF.Builder.CreateStore(ReceiverAsObject, |
| CGF.Builder.CreateStructGEP(ObjCSuper, 0)); |
| |
| // If this is a class message the metaclass is passed as the target. |
| llvm::Value *Target; |
| if (IsClassMessage) { |
| llvm::Value *MetaClassPtr = EmitMetaClassRef(Class); |
| llvm::Value *SuperPtr = CGF.Builder.CreateStructGEP(MetaClassPtr, 1); |
| llvm::Value *Super = CGF.Builder.CreateLoad(SuperPtr); |
| Target = Super; |
| } else { |
| Target = EmitClassRef(CGF.Builder, Class->getSuperClass()); |
| } |
| // FIXME: We shouldn't need to do this cast, rectify the ASTContext |
| // and ObjCTypes types. |
| const llvm::Type *ClassTy = |
| CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType()); |
| Target = CGF.Builder.CreateBitCast(Target, ClassTy); |
| CGF.Builder.CreateStore(Target, |
| CGF.Builder.CreateStructGEP(ObjCSuper, 1)); |
| |
| return EmitMessageSend(CGF, ResultType, Sel, |
| ObjCSuper, ObjCTypes.SuperPtrCTy, |
| true, CallArgs); |
| } |
| |
| /// Generate code for a message send expression. |
| CodeGen::RValue CGObjCMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
| QualType ResultType, |
| Selector Sel, |
| llvm::Value *Receiver, |
| bool IsClassMessage, |
| const CallArgList &CallArgs) { |
| llvm::Value *Arg0 = |
| CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy, "tmp"); |
| return EmitMessageSend(CGF, ResultType, Sel, |
| Arg0, CGF.getContext().getObjCIdType(), |
| false, CallArgs); |
| } |
| |
| CodeGen::RValue CGObjCMac::EmitMessageSend(CodeGen::CodeGenFunction &CGF, |
| QualType ResultType, |
| Selector Sel, |
| llvm::Value *Arg0, |
| QualType Arg0Ty, |
| bool IsSuper, |
| const CallArgList &CallArgs) { |
| CallArgList ActualArgs; |
| ActualArgs.push_back(std::make_pair(RValue::get(Arg0), Arg0Ty)); |
| ActualArgs.push_back(std::make_pair(RValue::get(EmitSelector(CGF.Builder, |
| Sel)), |
| CGF.getContext().getObjCSelType())); |
| ActualArgs.insert(ActualArgs.end(), CallArgs.begin(), CallArgs.end()); |
| |
| const llvm::FunctionType *FTy = |
| CGM.getTypes().GetFunctionType(CGCallInfo(ResultType, ActualArgs), |
| false); |
| llvm::Constant *Fn = |
| ObjCTypes.getMessageSendFn(IsSuper, CGM.ReturnTypeUsesSret(ResultType)); |
| Fn = llvm::ConstantExpr::getBitCast(Fn, llvm::PointerType::getUnqual(FTy)); |
| return CGF.EmitCall(Fn, ResultType, ActualArgs); |
| } |
| |
| llvm::Value *CGObjCMac::GenerateProtocolRef(llvm::IRBuilder<> &Builder, |
| const ObjCProtocolDecl *PD) { |
| // FIXME: I don't understand why gcc generates this, or where it is |
| // resolved. Investigate. Its also wasteful to look this up over and |
| // over. |
| LazySymbols.insert(&CGM.getContext().Idents.get("Protocol")); |
| |
| return llvm::ConstantExpr::getBitCast(GetProtocolRef(PD), |
| ObjCTypes.ExternalProtocolPtrTy); |
| } |
| |
| /* |
| // APPLE LOCAL radar 4585769 - Objective-C 1.0 extensions |
| struct _objc_protocol { |
| struct _objc_protocol_extension *isa; |
| char *protocol_name; |
| struct _objc_protocol_list *protocol_list; |
| struct _objc__method_prototype_list *instance_methods; |
| struct _objc__method_prototype_list *class_methods |
| }; |
| |
| See EmitProtocolExtension(). |
| */ |
| void CGObjCMac::GenerateProtocol(const ObjCProtocolDecl *PD) { |
| // FIXME: I don't understand why gcc generates this, or where it is |
| // resolved. Investigate. Its also wasteful to look this up over and |
| // over. |
| LazySymbols.insert(&CGM.getContext().Idents.get("Protocol")); |
| |
| const char *ProtocolName = PD->getName(); |
| |
| // Construct method lists. |
| std::vector<llvm::Constant*> InstanceMethods, ClassMethods; |
| std::vector<llvm::Constant*> OptInstanceMethods, OptClassMethods; |
| for (ObjCProtocolDecl::instmeth_iterator i = PD->instmeth_begin(), |
| e = PD->instmeth_end(); i != e; ++i) { |
| ObjCMethodDecl *MD = *i; |
| llvm::Constant *C = GetMethodDescriptionConstant(MD); |
| if (MD->getImplementationControl() == ObjCMethodDecl::Optional) { |
| OptInstanceMethods.push_back(C); |
| } else { |
| InstanceMethods.push_back(C); |
| } |
| } |
| |
| for (ObjCProtocolDecl::classmeth_iterator i = PD->classmeth_begin(), |
| e = PD->classmeth_end(); i != e; ++i) { |
| ObjCMethodDecl *MD = *i; |
| llvm::Constant *C = GetMethodDescriptionConstant(MD); |
| if (MD->getImplementationControl() == ObjCMethodDecl::Optional) { |
| OptClassMethods.push_back(C); |
| } else { |
| ClassMethods.push_back(C); |
| } |
| } |
| |
| std::vector<llvm::Constant*> Values(5); |
| Values[0] = EmitProtocolExtension(PD, OptInstanceMethods, OptClassMethods); |
| Values[1] = GetClassName(PD->getIdentifier()); |
| Values[2] = |
| EmitProtocolList(std::string("\01L_OBJC_PROTOCOL_REFS_")+PD->getName(), |
| PD->protocol_begin(), |
| PD->protocol_end()); |
| Values[3] = |
| EmitMethodDescList(std::string("\01L_OBJC_PROTOCOL_INSTANCE_METHODS_") |
| + PD->getName(), |
| "__OBJC,__cat_inst_meth,regular,no_dead_strip", |
| InstanceMethods); |
| Values[4] = |
| EmitMethodDescList(std::string("\01L_OBJC_PROTOCOL_CLASS_METHODS_") |
| + PD->getName(), |
| "__OBJC,__cat_cls_meth,regular,no_dead_strip", |
| ClassMethods); |
| llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ProtocolTy, |
| Values); |
| |
| llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()]; |
| if (Entry) { |
| // Already created, just update the initializer |
| Entry->setInitializer(Init); |
| } else { |
| Entry = |
| new llvm::GlobalVariable(ObjCTypes.ProtocolTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| std::string("\01L_OBJC_PROTOCOL_")+ProtocolName, |
| &CGM.getModule()); |
| Entry->setSection("__OBJC,__protocol,regular,no_dead_strip"); |
| UsedGlobals.push_back(Entry); |
| // FIXME: Is this necessary? Why only for protocol? |
| Entry->setAlignment(4); |
| } |
| } |
| |
| llvm::GlobalVariable *CGObjCMac::GetProtocolRef(const ObjCProtocolDecl *PD) { |
| llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()]; |
| |
| if (!Entry) { |
| std::vector<llvm::Constant*> Values(5); |
| Values[0] = llvm::Constant::getNullValue(ObjCTypes.ProtocolExtensionPtrTy); |
| Values[1] = GetClassName(PD->getIdentifier()); |
| Values[2] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy); |
| Values[3] = Values[4] = |
| llvm::Constant::getNullValue(ObjCTypes.MethodDescriptionListPtrTy); |
| llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ProtocolTy, |
| Values); |
| |
| Entry = |
| new llvm::GlobalVariable(ObjCTypes.ProtocolTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| std::string("\01L_OBJC_PROTOCOL_")+PD->getName(), |
| &CGM.getModule()); |
| Entry->setSection("__OBJC,__protocol,regular,no_dead_strip"); |
| UsedGlobals.push_back(Entry); |
| // FIXME: Is this necessary? Why only for protocol? |
| Entry->setAlignment(4); |
| } |
| |
| return Entry; |
| } |
| |
| /* |
| struct _objc_protocol_extension { |
| uint32_t size; |
| struct objc_method_description_list *optional_instance_methods; |
| struct objc_method_description_list *optional_class_methods; |
| struct objc_property_list *instance_properties; |
| }; |
| */ |
| llvm::Constant * |
| CGObjCMac::EmitProtocolExtension(const ObjCProtocolDecl *PD, |
| const ConstantVector &OptInstanceMethods, |
| const ConstantVector &OptClassMethods) { |
| uint64_t Size = |
| CGM.getTargetData().getABITypeSize(ObjCTypes.ProtocolExtensionTy); |
| std::vector<llvm::Constant*> Values(4); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size); |
| Values[1] = |
| EmitMethodDescList(std::string("\01L_OBJC_PROTOCOL_INSTANCE_METHODS_OPT_") |
| + PD->getName(), |
| "__OBJC,__cat_inst_meth,regular,no_dead_strip", |
| OptInstanceMethods); |
| Values[2] = |
| EmitMethodDescList(std::string("\01L_OBJC_PROTOCOL_CLASS_METHODS_OPT_") |
| + PD->getName(), |
| "__OBJC,__cat_cls_meth,regular,no_dead_strip", |
| OptClassMethods); |
| Values[3] = EmitPropertyList(std::string("\01L_OBJC_$_PROP_PROTO_LIST_") + |
| PD->getName(), |
| 0, |
| PD->classprop_begin(), |
| PD->classprop_end()); |
| |
| // Return null if no extension bits are used. |
| if (Values[1]->isNullValue() && Values[2]->isNullValue() && |
| Values[3]->isNullValue()) |
| return llvm::Constant::getNullValue(ObjCTypes.ProtocolExtensionPtrTy); |
| |
| llvm::Constant *Init = |
| llvm::ConstantStruct::get(ObjCTypes.ProtocolExtensionTy, Values); |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(ObjCTypes.ProtocolExtensionTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| (std::string("\01L_OBJC_PROTOCOLEXT_") + |
| PD->getName()), |
| &CGM.getModule()); |
| // No special section, but goes in llvm.used |
| UsedGlobals.push_back(GV); |
| |
| return GV; |
| } |
| |
| /* |
| struct objc_protocol_list { |
| struct objc_protocol_list *next; |
| long count; |
| Protocol *list[]; |
| }; |
| */ |
| llvm::Constant * |
| CGObjCMac::EmitProtocolList(const std::string &Name, |
| ObjCProtocolDecl::protocol_iterator begin, |
| ObjCProtocolDecl::protocol_iterator end) { |
| std::vector<llvm::Constant*> ProtocolRefs; |
| |
| for (; begin != end; ++begin) |
| ProtocolRefs.push_back(GetProtocolRef(*begin)); |
| |
| // Just return null for empty protocol lists |
| if (ProtocolRefs.empty()) |
| return llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy); |
| |
| // This list is null terminated. |
| ProtocolRefs.push_back(llvm::Constant::getNullValue(ObjCTypes.ProtocolPtrTy)); |
| |
| std::vector<llvm::Constant*> Values(3); |
| // This field is only used by the runtime. |
| Values[0] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy); |
| Values[1] = llvm::ConstantInt::get(ObjCTypes.LongTy, ProtocolRefs.size() - 1); |
| Values[2] = |
| llvm::ConstantArray::get(llvm::ArrayType::get(ObjCTypes.ProtocolPtrTy, |
| ProtocolRefs.size()), |
| ProtocolRefs); |
| |
| llvm::Constant *Init = llvm::ConstantStruct::get(Values); |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(Init->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| Name, |
| &CGM.getModule()); |
| GV->setSection("__OBJC,__cat_cls_meth,regular,no_dead_strip"); |
| return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListPtrTy); |
| } |
| |
| /* |
| struct _objc_property { |
| const char * const name; |
| const char * const attributes; |
| }; |
| |
| struct _objc_property_list { |
| uint32_t entsize; // sizeof (struct _objc_property) |
| uint32_t prop_count; |
| struct _objc_property[prop_count]; |
| }; |
| */ |
| llvm::Constant *CGObjCMac::EmitPropertyList(const std::string &Name, |
| const Decl *Container, |
| ObjCPropertyDecl * const *begin, |
| ObjCPropertyDecl * const *end) { |
| std::vector<llvm::Constant*> Properties, Prop(2); |
| for (; begin != end; ++begin) { |
| const ObjCPropertyDecl *PD = *begin; |
| Prop[0] = GetPropertyName(PD->getIdentifier()); |
| Prop[1] = GetPropertyTypeString(PD, Container); |
| Properties.push_back(llvm::ConstantStruct::get(ObjCTypes.PropertyTy, |
| Prop)); |
| } |
| |
| // Return null for empty list. |
| if (Properties.empty()) |
| return llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy); |
| |
| unsigned PropertySize = |
| CGM.getTargetData().getABITypeSize(ObjCTypes.PropertyTy); |
| std::vector<llvm::Constant*> Values(3); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, PropertySize); |
| Values[1] = llvm::ConstantInt::get(ObjCTypes.IntTy, Properties.size()); |
| llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.PropertyTy, |
| Properties.size()); |
| Values[2] = llvm::ConstantArray::get(AT, Properties); |
| llvm::Constant *Init = llvm::ConstantStruct::get(Values); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(Init->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| Name, |
| &CGM.getModule()); |
| // No special section on property lists? |
| UsedGlobals.push_back(GV); |
| return llvm::ConstantExpr::getBitCast(GV, |
| ObjCTypes.PropertyListPtrTy); |
| |
| } |
| |
| /* |
| struct objc_method_description_list { |
| int count; |
| struct objc_method_description list[]; |
| }; |
| */ |
| llvm::Constant * |
| CGObjCMac::GetMethodDescriptionConstant(const ObjCMethodDecl *MD) { |
| std::vector<llvm::Constant*> Desc(2); |
| Desc[0] = llvm::ConstantExpr::getBitCast(GetMethodVarName(MD->getSelector()), |
| ObjCTypes.SelectorPtrTy); |
| Desc[1] = GetMethodVarType(MD); |
| return llvm::ConstantStruct::get(ObjCTypes.MethodDescriptionTy, |
| Desc); |
| } |
| |
| llvm::Constant *CGObjCMac::EmitMethodDescList(const std::string &Name, |
| const char *Section, |
| const ConstantVector &Methods) { |
| // Return null for empty list. |
| if (Methods.empty()) |
| return llvm::Constant::getNullValue(ObjCTypes.MethodDescriptionListPtrTy); |
| |
| std::vector<llvm::Constant*> Values(2); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Methods.size()); |
| llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.MethodDescriptionTy, |
| Methods.size()); |
| Values[1] = llvm::ConstantArray::get(AT, Methods); |
| llvm::Constant *Init = llvm::ConstantStruct::get(Values); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(Init->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, Name, &CGM.getModule()); |
| GV->setSection(Section); |
| UsedGlobals.push_back(GV); |
| return llvm::ConstantExpr::getBitCast(GV, |
| ObjCTypes.MethodDescriptionListPtrTy); |
| } |
| |
| /* |
| 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; |
| uint32_t size; // <rdar://4585769> |
| struct _objc_property_list *instance_properties; |
| }; |
| */ |
| void CGObjCMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) { |
| unsigned Size = CGM.getTargetData().getABITypeSize(ObjCTypes.CategoryTy); |
| |
| // FIXME: This is poor design, the OCD should have a pointer to the |
| // category decl. Additionally, note that Category can be null for |
| // the @implementation w/o an @interface case. Sema should just |
| // create one for us as it does for @implementation so everyone else |
| // can live life under a clear blue sky. |
| const ObjCInterfaceDecl *Interface = OCD->getClassInterface(); |
| const ObjCCategoryDecl *Category = |
| Interface->FindCategoryDeclaration(OCD->getIdentifier()); |
| std::string ExtName(std::string(Interface->getName()) + |
| "_" + |
| OCD->getName()); |
| |
| std::vector<llvm::Constant*> InstanceMethods, ClassMethods; |
| for (ObjCCategoryImplDecl::instmeth_iterator i = OCD->instmeth_begin(), |
| e = OCD->instmeth_end(); i != e; ++i) { |
| // Instance methods should always be defined. |
| InstanceMethods.push_back(GetMethodConstant(*i)); |
| } |
| for (ObjCCategoryImplDecl::classmeth_iterator i = OCD->classmeth_begin(), |
| e = OCD->classmeth_end(); i != e; ++i) { |
| // Class methods should always be defined. |
| ClassMethods.push_back(GetMethodConstant(*i)); |
| } |
| |
| std::vector<llvm::Constant*> Values(7); |
| Values[0] = GetClassName(OCD->getIdentifier()); |
| Values[1] = GetClassName(Interface->getIdentifier()); |
| Values[2] = |
| EmitMethodList(std::string("\01L_OBJC_CATEGORY_INSTANCE_METHODS_") + |
| ExtName, |
| "__OBJC,__cat_inst_meth,regular,no_dead_strip", |
| InstanceMethods); |
| Values[3] = |
| EmitMethodList(std::string("\01L_OBJC_CATEGORY_CLASS_METHODS_") + ExtName, |
| "__OBJC,__cat_class_meth,regular,no_dead_strip", |
| ClassMethods); |
| if (Category) { |
| Values[4] = |
| EmitProtocolList(std::string("\01L_OBJC_CATEGORY_PROTOCOLS_") + ExtName, |
| Category->protocol_begin(), |
| Category->protocol_end()); |
| } else { |
| Values[4] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy); |
| } |
| Values[5] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size); |
| |
| // If there is no category @interface then there can be no properties. |
| if (Category) { |
| Values[6] = EmitPropertyList(std::string("\01L_OBJC_$_PROP_LIST_") + ExtName, |
| OCD, |
| Category->classprop_begin(), |
| Category->classprop_end()); |
| } else { |
| Values[6] = llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy); |
| } |
| |
| llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.CategoryTy, |
| Values); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(ObjCTypes.CategoryTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| std::string("\01L_OBJC_CATEGORY_")+ExtName, |
| &CGM.getModule()); |
| GV->setSection("__OBJC,__category,regular,no_dead_strip"); |
| UsedGlobals.push_back(GV); |
| DefinedCategories.push_back(GV); |
| } |
| |
| // FIXME: Get from somewhere? |
| enum ClassFlags { |
| eClassFlags_Factory = 0x00001, |
| eClassFlags_Meta = 0x00002, |
| // <rdr://5142207> |
| eClassFlags_HasCXXStructors = 0x02000, |
| eClassFlags_Hidden = 0x20000, |
| eClassFlags_ABI2_Hidden = 0x00010, |
| eClassFlags_ABI2_HasCXXStructors = 0x00004 // <rdr://4923634> |
| }; |
| |
| // <rdr://5142207&4705298&4843145> |
| static bool IsClassHidden(const ObjCInterfaceDecl *ID) { |
| if (const VisibilityAttr *attr = ID->getAttr<VisibilityAttr>()) { |
| // FIXME: Support -fvisibility |
| switch (attr->getVisibility()) { |
| default: |
| assert(0 && "Unknown visibility"); |
| return false; |
| case VisibilityAttr::DefaultVisibility: |
| case VisibilityAttr::ProtectedVisibility: // FIXME: What do we do here? |
| return false; |
| case VisibilityAttr::HiddenVisibility: |
| return true; |
| } |
| } else { |
| return false; // FIXME: Support -fvisibility |
| } |
| } |
| |
| /* |
| struct _objc_class { |
| Class isa; |
| Class super_class; |
| const 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; |
| // Objective-C 1.0 extensions (<rdr://4585769>) |
| const char *ivar_layout; |
| struct _objc_class_ext *ext; |
| }; |
| |
| See EmitClassExtension(); |
| */ |
| void CGObjCMac::GenerateClass(const ObjCImplementationDecl *ID) { |
| DefinedSymbols.insert(ID->getIdentifier()); |
| |
| const char *ClassName = ID->getName(); |
| // FIXME: Gross |
| ObjCInterfaceDecl *Interface = |
| const_cast<ObjCInterfaceDecl*>(ID->getClassInterface()); |
| llvm::Constant *Protocols = |
| EmitProtocolList(std::string("\01L_OBJC_CLASS_PROTOCOLS_") + ID->getName(), |
| Interface->protocol_begin(), |
| Interface->protocol_end()); |
| const llvm::Type *InterfaceTy = |
| CGM.getTypes().ConvertType(CGM.getContext().getObjCInterfaceType(Interface)); |
| unsigned Flags = eClassFlags_Factory; |
| unsigned Size = CGM.getTargetData().getABITypeSize(InterfaceTy); |
| |
| // FIXME: Set CXX-structors flag. |
| if (IsClassHidden(ID->getClassInterface())) |
| Flags |= eClassFlags_Hidden; |
| |
| std::vector<llvm::Constant*> InstanceMethods, ClassMethods; |
| for (ObjCImplementationDecl::instmeth_iterator i = ID->instmeth_begin(), |
| e = ID->instmeth_end(); i != e; ++i) { |
| // Instance methods should always be defined. |
| InstanceMethods.push_back(GetMethodConstant(*i)); |
| } |
| for (ObjCImplementationDecl::classmeth_iterator i = ID->classmeth_begin(), |
| e = ID->classmeth_end(); i != e; ++i) { |
| // Class methods should always be defined. |
| ClassMethods.push_back(GetMethodConstant(*i)); |
| } |
| |
| for (ObjCImplementationDecl::propimpl_iterator i = ID->propimpl_begin(), |
| e = ID->propimpl_end(); i != e; ++i) { |
| ObjCPropertyImplDecl *PID = *i; |
| |
| if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
| ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| |
| if (ObjCMethodDecl *MD = PD->getGetterMethodDecl()) |
| if (llvm::Constant *C = GetMethodConstant(MD)) |
| InstanceMethods.push_back(C); |
| if (ObjCMethodDecl *MD = PD->getSetterMethodDecl()) |
| if (llvm::Constant *C = GetMethodConstant(MD)) |
| InstanceMethods.push_back(C); |
| } |
| } |
| |
| std::vector<llvm::Constant*> Values(12); |
| Values[ 0] = EmitMetaClass(ID, Protocols, InterfaceTy, ClassMethods); |
| if (ObjCInterfaceDecl *Super = Interface->getSuperClass()) { |
| // Record a reference to the super class. |
| LazySymbols.insert(Super->getIdentifier()); |
| |
| Values[ 1] = |
| llvm::ConstantExpr::getBitCast(GetClassName(Super->getIdentifier()), |
| ObjCTypes.ClassPtrTy); |
| } else { |
| Values[ 1] = llvm::Constant::getNullValue(ObjCTypes.ClassPtrTy); |
| } |
| Values[ 2] = GetClassName(ID->getIdentifier()); |
| // Version is always 0. |
| Values[ 3] = llvm::ConstantInt::get(ObjCTypes.LongTy, 0); |
| Values[ 4] = llvm::ConstantInt::get(ObjCTypes.LongTy, Flags); |
| Values[ 5] = llvm::ConstantInt::get(ObjCTypes.LongTy, Size); |
| Values[ 6] = EmitIvarList(ID, false, InterfaceTy); |
| Values[ 7] = |
| EmitMethodList(std::string("\01L_OBJC_INSTANCE_METHODS_") + ID->getName(), |
| "__OBJC,__inst_meth,regular,no_dead_strip", |
| InstanceMethods); |
| // cache is always NULL. |
| Values[ 8] = llvm::Constant::getNullValue(ObjCTypes.CachePtrTy); |
| Values[ 9] = Protocols; |
| // FIXME: Set ivar_layout |
| Values[10] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy); |
| Values[11] = EmitClassExtension(ID); |
| llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassTy, |
| Values); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(ObjCTypes.ClassTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| std::string("\01L_OBJC_CLASS_")+ClassName, |
| &CGM.getModule()); |
| GV->setSection("__OBJC,__class,regular,no_dead_strip"); |
| UsedGlobals.push_back(GV); |
| // FIXME: Why? |
| GV->setAlignment(32); |
| DefinedClasses.push_back(GV); |
| } |
| |
| llvm::Constant *CGObjCMac::EmitMetaClass(const ObjCImplementationDecl *ID, |
| llvm::Constant *Protocols, |
| const llvm::Type *InterfaceTy, |
| const ConstantVector &Methods) { |
| const char *ClassName = ID->getName(); |
| unsigned Flags = eClassFlags_Meta; |
| unsigned Size = CGM.getTargetData().getABITypeSize(ObjCTypes.ClassTy); |
| |
| if (IsClassHidden(ID->getClassInterface())) |
| Flags |= eClassFlags_Hidden; |
| |
| std::vector<llvm::Constant*> Values(12); |
| // The isa for the metaclass is the root of the hierarchy. |
| const ObjCInterfaceDecl *Root = ID->getClassInterface(); |
| while (const ObjCInterfaceDecl *Super = Root->getSuperClass()) |
| Root = Super; |
| Values[ 0] = |
| llvm::ConstantExpr::getBitCast(GetClassName(Root->getIdentifier()), |
| ObjCTypes.ClassPtrTy); |
| // The super class for the metaclass is emitted as the name of the |
| // super class. The runtime fixes this up to point to the |
| // *metaclass* for the super class. |
| if (ObjCInterfaceDecl *Super = ID->getClassInterface()->getSuperClass()) { |
| Values[ 1] = |
| llvm::ConstantExpr::getBitCast(GetClassName(Super->getIdentifier()), |
| ObjCTypes.ClassPtrTy); |
| } else { |
| Values[ 1] = llvm::Constant::getNullValue(ObjCTypes.ClassPtrTy); |
| } |
| Values[ 2] = GetClassName(ID->getIdentifier()); |
| // Version is always 0. |
| Values[ 3] = llvm::ConstantInt::get(ObjCTypes.LongTy, 0); |
| Values[ 4] = llvm::ConstantInt::get(ObjCTypes.LongTy, Flags); |
| Values[ 5] = llvm::ConstantInt::get(ObjCTypes.LongTy, Size); |
| Values[ 6] = EmitIvarList(ID, true, InterfaceTy); |
| Values[ 7] = |
| EmitMethodList(std::string("\01L_OBJC_CLASS_METHODS_") + ID->getName(), |
| "__OBJC,__inst_meth,regular,no_dead_strip", |
| Methods); |
| // cache is always NULL. |
| Values[ 8] = llvm::Constant::getNullValue(ObjCTypes.CachePtrTy); |
| Values[ 9] = Protocols; |
| // ivar_layout for metaclass is always NULL. |
| Values[10] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy); |
| // The class extension is always unused for metaclasses. |
| Values[11] = llvm::Constant::getNullValue(ObjCTypes.ClassExtensionPtrTy); |
| llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassTy, |
| Values); |
| |
| std::string Name("\01L_OBJC_METACLASS_"); |
| Name += ClassName; |
| |
| // Check for a forward reference. |
| llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name); |
| if (GV) { |
| assert(GV->getType()->getElementType() == ObjCTypes.ClassTy && |
| "Forward metaclass reference has incorrect type."); |
| GV->setLinkage(llvm::GlobalValue::InternalLinkage); |
| GV->setInitializer(Init); |
| } else { |
| GV = new llvm::GlobalVariable(ObjCTypes.ClassTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, Name, |
| &CGM.getModule()); |
| } |
| GV->setSection("__OBJC,__meta_class,regular,no_dead_strip"); |
| UsedGlobals.push_back(GV); |
| // FIXME: Why? |
| GV->setAlignment(32); |
| |
| return GV; |
| } |
| |
| llvm::Constant *CGObjCMac::EmitMetaClassRef(const ObjCInterfaceDecl *ID) { |
| std::string Name("\01L_OBJC_METACLASS_"); |
| Name += ID->getName(); |
| |
| // FIXME: Should we look these up somewhere other than the |
| // module. Its a bit silly since we only generate these while |
| // processing an implementation, so exactly one pointer would work |
| // if know when we entered/exitted an implementation block. |
| |
| // Check for an existing forward reference. |
| if (llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name)) { |
| assert(GV->getType()->getElementType() == ObjCTypes.ClassTy && |
| "Forward metaclass reference has incorrect type."); |
| return GV; |
| } else { |
| // Generate as an external reference to keep a consistent |
| // module. This will be patched up when we emit the metaclass. |
| return new llvm::GlobalVariable(ObjCTypes.ClassTy, false, |
| llvm::GlobalValue::ExternalLinkage, |
| 0, |
| Name, |
| &CGM.getModule()); |
| } |
| } |
| |
| /* |
| struct objc_class_ext { |
| uint32_t size; |
| const char *weak_ivar_layout; |
| struct _objc_property_list *properties; |
| }; |
| */ |
| llvm::Constant * |
| CGObjCMac::EmitClassExtension(const ObjCImplementationDecl *ID) { |
| uint64_t Size = |
| CGM.getTargetData().getABITypeSize(ObjCTypes.ClassExtensionTy); |
| |
| std::vector<llvm::Constant*> Values(3); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size); |
| // FIXME: Output weak_ivar_layout string. |
| Values[1] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy); |
| Values[2] = EmitPropertyList(std::string("\01L_OBJC_$_PROP_LIST_") + |
| ID->getName(), |
| ID, |
| ID->getClassInterface()->classprop_begin(), |
| ID->getClassInterface()->classprop_end()); |
| |
| // Return null if no extension bits are used. |
| if (Values[1]->isNullValue() && Values[2]->isNullValue()) |
| return llvm::Constant::getNullValue(ObjCTypes.ClassExtensionPtrTy); |
| |
| llvm::Constant *Init = |
| llvm::ConstantStruct::get(ObjCTypes.ClassExtensionTy, Values); |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(ObjCTypes.ClassExtensionTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| (std::string("\01L_OBJC_CLASSEXT_") + |
| ID->getName()), |
| &CGM.getModule()); |
| // No special section, but goes in llvm.used |
| UsedGlobals.push_back(GV); |
| |
| return GV; |
| } |
| |
| /* |
| struct objc_ivar { |
| char *ivar_name; |
| char *ivar_type; |
| int ivar_offset; |
| }; |
| |
| struct objc_ivar_list { |
| int ivar_count; |
| struct objc_ivar list[count]; |
| }; |
| */ |
| llvm::Constant *CGObjCMac::EmitIvarList(const ObjCImplementationDecl *ID, |
| bool ForClass, |
| const llvm::Type *InterfaceTy) { |
| std::vector<llvm::Constant*> Ivars, Ivar(3); |
| |
| // When emitting the root class GCC emits ivar entries for the |
| // actual class structure. It is not clear if we need to follow this |
| // behavior; for now lets try and get away with not doing it. If so, |
| // the cleanest solution would be to make up an ObjCInterfaceDecl |
| // for the class. |
| if (ForClass) |
| return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy); |
| |
| const llvm::StructLayout *Layout = |
| CGM.getTargetData().getStructLayout(cast<llvm::StructType>(InterfaceTy)); |
| for (ObjCInterfaceDecl::ivar_iterator |
| i = ID->getClassInterface()->ivar_begin(), |
| e = ID->getClassInterface()->ivar_end(); i != e; ++i) { |
| ObjCIvarDecl *V = *i; |
| unsigned Offset = |
| Layout->getElementOffset(CGM.getTypes().getLLVMFieldNo(V)); |
| std::string TypeStr; |
| llvm::SmallVector<const RecordType *, 8> EncodingRecordTypes; |
| Ivar[0] = GetMethodVarName(V->getIdentifier()); |
| CGM.getContext().getObjCEncodingForType(V->getType(), TypeStr, |
| EncodingRecordTypes); |
| Ivar[1] = GetMethodVarType(TypeStr); |
| Ivar[2] = llvm::ConstantInt::get(ObjCTypes.IntTy, Offset); |
| Ivars.push_back(llvm::ConstantStruct::get(ObjCTypes.IvarTy, |
| Ivar)); |
| } |
| |
| // Return null for empty list. |
| if (Ivars.empty()) |
| return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy); |
| |
| std::vector<llvm::Constant*> Values(2); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Ivars.size()); |
| llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.IvarTy, |
| Ivars.size()); |
| Values[1] = llvm::ConstantArray::get(AT, Ivars); |
| llvm::Constant *Init = llvm::ConstantStruct::get(Values); |
| |
| const char *Prefix = (ForClass ? "\01L_OBJC_CLASS_VARIABLES_" : |
| "\01L_OBJC_INSTANCE_VARIABLES_"); |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(Init->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| std::string(Prefix) + ID->getName(), |
| &CGM.getModule()); |
| if (ForClass) { |
| GV->setSection("__OBJC,__cls_vars,regular,no_dead_strip"); |
| // FIXME: Why is this only here? |
| GV->setAlignment(32); |
| } else { |
| GV->setSection("__OBJC,__instance_vars,regular,no_dead_strip"); |
| } |
| UsedGlobals.push_back(GV); |
| return llvm::ConstantExpr::getBitCast(GV, |
| ObjCTypes.IvarListPtrTy); |
| } |
| |
| /* |
| struct objc_method { |
| SEL method_name; |
| char *method_types; |
| void *method; |
| }; |
| |
| struct objc_method_list { |
| struct objc_method_list *obsolete; |
| int count; |
| struct objc_method methods_list[count]; |
| }; |
| */ |
| |
| /// GetMethodConstant - Return a struct objc_method constant for the |
| /// given method if it has been defined. The result is null if the |
| /// method has not been defined. The return value has type MethodPtrTy. |
| llvm::Constant *CGObjCMac::GetMethodConstant(const ObjCMethodDecl *MD) { |
| // FIXME: Use DenseMap::lookup |
| llvm::Function *Fn = MethodDefinitions[MD]; |
| if (!Fn) |
| return 0; |
| |
| std::vector<llvm::Constant*> Method(3); |
| Method[0] = |
| llvm::ConstantExpr::getBitCast(GetMethodVarName(MD->getSelector()), |
| ObjCTypes.SelectorPtrTy); |
| Method[1] = GetMethodVarType(MD); |
| Method[2] = llvm::ConstantExpr::getBitCast(Fn, ObjCTypes.Int8PtrTy); |
| return llvm::ConstantStruct::get(ObjCTypes.MethodTy, Method); |
| } |
| |
| llvm::Constant *CGObjCMac::EmitMethodList(const std::string &Name, |
| const char *Section, |
| const ConstantVector &Methods) { |
| // Return null for empty list. |
| if (Methods.empty()) |
| return llvm::Constant::getNullValue(ObjCTypes.MethodListPtrTy); |
| |
| std::vector<llvm::Constant*> Values(3); |
| Values[0] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy); |
| Values[1] = llvm::ConstantInt::get(ObjCTypes.IntTy, Methods.size()); |
| llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.MethodTy, |
| Methods.size()); |
| Values[2] = llvm::ConstantArray::get(AT, Methods); |
| llvm::Constant *Init = llvm::ConstantStruct::get(Values); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(Init->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| Name, |
| &CGM.getModule()); |
| GV->setSection(Section); |
| UsedGlobals.push_back(GV); |
| return llvm::ConstantExpr::getBitCast(GV, |
| ObjCTypes.MethodListPtrTy); |
| } |
| |
| llvm::Function *CGObjCMac::GenerateMethod(const ObjCMethodDecl *OMD) { |
| std::string Name; |
| GetNameForMethod(OMD, Name); |
| |
| const llvm::FunctionType *MethodTy = |
| CGM.getTypes().GetFunctionType(CGFunctionInfo(OMD, CGM.getContext())); |
| llvm::Function *Method = |
| llvm::Function::Create(MethodTy, |
| llvm::GlobalValue::InternalLinkage, |
| Name, |
| &CGM.getModule()); |
| MethodDefinitions.insert(std::make_pair(OMD, Method)); |
| |
| return Method; |
| } |
| |
| llvm::Function *CGObjCMac::ModuleInitFunction() { |
| // Abuse this interface function as a place to finalize. |
| FinishModule(); |
| |
| return NULL; |
| } |
| |
| llvm::Function *CGObjCMac::GetPropertyGetFunction() { |
| return ObjCTypes.GetPropertyFn; |
| } |
| |
| llvm::Function *CGObjCMac::GetPropertySetFunction() { |
| return ObjCTypes.SetPropertyFn; |
| } |
| |
| llvm::Function *CGObjCMac::EnumerationMutationFunction() |
| { |
| return ObjCTypes.EnumerationMutationFn; |
| } |
| |
| void CGObjCMac::EmitTryStmt(CodeGen::CodeGenFunction &CGF, |
| const ObjCAtTryStmt &S) |
| { |
| // Allocate exception data. |
| llvm::Value *ExceptionData = CGF.CreateTempAlloca(ObjCTypes.ExceptionDataTy, |
| "exceptiondata.ptr"); |
| |
| // Allocate memory for the rethrow pointer. |
| llvm::Value *RethrowPtr = CGF.CreateTempAlloca(ObjCTypes.ObjectPtrTy); |
| CGF.Builder.CreateStore(llvm::Constant::getNullValue(ObjCTypes.ObjectPtrTy), |
| RethrowPtr); |
| |
| // Enter a new try block and call setjmp. |
| CGF.Builder.CreateCall(ObjCTypes.ExceptionTryEnterFn, ExceptionData); |
| llvm::Value *JmpBufPtr = CGF.Builder.CreateStructGEP(ExceptionData, 0, |
| "jmpbufarray"); |
| JmpBufPtr = CGF.Builder.CreateStructGEP(JmpBufPtr, 0, "tmp"); |
| llvm::Value *SetJmpResult = CGF.Builder.CreateCall(ObjCTypes.SetJmpFn, |
| JmpBufPtr, "result"); |
| |
| |
| llvm::BasicBlock *FinallyBlock = llvm::BasicBlock::Create("finally"); |
| |
| llvm::BasicBlock *TryBlock = llvm::BasicBlock::Create("try"); |
| llvm::BasicBlock *ExceptionInTryBlock = |
| llvm::BasicBlock::Create("exceptionintry"); |
| |
| // If setjmp returns 1, there was an exception in the @try block. |
| llvm::Value *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty); |
| llvm::Value *IsZero = CGF.Builder.CreateICmpEQ(SetJmpResult, Zero, "iszero"); |
| CGF.Builder.CreateCondBr(IsZero, TryBlock, ExceptionInTryBlock); |
| |
| // Emit the @try block. |
| CGF.EmitBlock(TryBlock); |
| CGF.EmitStmt(S.getTryBody()); |
| CGF.Builder.CreateBr(FinallyBlock); |
| |
| // Emit the "exception in @try" block. |
| CGF.EmitBlock(ExceptionInTryBlock); |
| |
| if (const ObjCAtCatchStmt* CatchStmt = S.getCatchStmts()) { |
| // Allocate memory for the caught exception and extract it from the |
| // exception data. |
| llvm::Value *CaughtPtr = CGF.CreateTempAlloca(ObjCTypes.ObjectPtrTy); |
| llvm::Value *Extract = CGF.Builder.CreateCall(ObjCTypes.ExceptionExtractFn, |
| ExceptionData); |
| CGF.Builder.CreateStore(Extract, CaughtPtr); |
| |
| // Enter a new exception try block |
| // (in case a @catch block throws an exception). |
| CGF.Builder.CreateCall(ObjCTypes.ExceptionTryEnterFn, ExceptionData); |
| |
| llvm::Value *SetJmpResult = CGF.Builder.CreateCall(ObjCTypes.SetJmpFn, |
| JmpBufPtr, "result"); |
| |
| |
| llvm::Value *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty); |
| llvm::Value *IsZero = CGF.Builder.CreateICmpEQ(SetJmpResult, Zero, |
| "iszero"); |
| |
| llvm::BasicBlock *CatchBlock = llvm::BasicBlock::Create("catch"); |
| llvm::BasicBlock *ExceptionInCatchBlock = |
| llvm::BasicBlock::Create("exceptionincatch"); |
| CGF.Builder.CreateCondBr(IsZero, CatchBlock, ExceptionInCatchBlock); |
| |
| CGF.EmitBlock(CatchBlock); |
| |
| // Handle catch list |
| for (; CatchStmt; CatchStmt = CatchStmt->getNextCatchStmt()) { |
| llvm::BasicBlock *NextCatchBlock = llvm::BasicBlock::Create("nextcatch"); |
| llvm::Value *Caught = CGF.Builder.CreateLoad(CaughtPtr, "caught"); |
| |
| QualType T; |
| bool MatchesAll = false; |
| const DeclStmt *CatchParam = |
| cast_or_null<DeclStmt>(CatchStmt->getCatchParamStmt()); |
| |
| // catch(...) always matches. |
| if (!CatchParam) |
| MatchesAll = true; |
| else { |
| QualType PT = cast<ValueDecl>(CatchParam->getDecl())->getType(); |
| T = PT->getAsPointerType()->getPointeeType(); |
| |
| // catch(id e) always matches. |
| if (CGF.getContext().isObjCIdType(T)) |
| MatchesAll = true; |
| } |
| |
| if (MatchesAll) { |
| if (CatchParam) { |
| CGF.EmitStmt(CatchParam); |
| |
| const VarDecl *VD = cast<VarDecl>(CatchParam->getDecl()); |
| |
| llvm::Value *V = CGF.GetAddrOfLocalVar(VD); |
| |
| CGF.Builder.CreateStore(Caught, V); |
| } |
| |
| CGF.EmitStmt(CatchStmt->getCatchBody()); |
| CGF.Builder.CreateBr(FinallyBlock); |
| CGF.EmitBlock(NextCatchBlock); |
| break; |
| } |
| |
| const ObjCInterfaceType *ObjCType = T->getAsObjCInterfaceType(); |
| assert(ObjCType && "Catch parameter must have Objective-C type!"); |
| |
| // Check if the @catch block matches the exception object. |
| llvm::Value *Class = EmitClassRef(CGF.Builder, ObjCType->getDecl()); |
| |
| llvm::Value *Match = CGF.Builder.CreateCall2(ObjCTypes.ExceptionMatchFn, |
| Class, Caught, "match"); |
| |
| llvm::Value *DidMatch = CGF.Builder.CreateICmpNE(Match, Zero, "iszero"); |
| |
| llvm::BasicBlock *MatchedBlock = llvm::BasicBlock::Create("matched"); |
| |
| CGF.Builder.CreateCondBr(DidMatch, MatchedBlock, NextCatchBlock); |
| |
| // Emit the @catch block. |
| CGF.EmitBlock(MatchedBlock); |
| if (CatchParam) { |
| CGF.EmitStmt(CatchParam); |
| |
| const VarDecl *VD = cast<VarDecl>(CatchParam->getDecl()); |
| |
| llvm::Value *Tmp = |
| CGF.Builder.CreateBitCast(Caught, CGF.ConvertType(VD->getType()), |
| "tmp"); |
| CGF.Builder.CreateStore(Tmp, CGF.GetAddrOfLocalVar(VD)); |
| } |
| |
| CGF.EmitStmt(CatchStmt->getCatchBody()); |
| CGF.Builder.CreateBr(FinallyBlock); |
| |
| CGF.EmitBlock(NextCatchBlock); |
| } |
| |
| // None of the handlers caught the exception, so store it and rethrow |
| // it later. |
| llvm::Value *Caught = CGF.Builder.CreateLoad(CaughtPtr, "caught"); |
| CGF.Builder.CreateStore(Caught, RethrowPtr); |
| CGF.Builder.CreateCall(ObjCTypes.ExceptionTryExitFn, |
| ExceptionData); |
| |
| CGF.Builder.CreateBr(FinallyBlock); |
| |
| CGF.EmitBlock(ExceptionInCatchBlock); |
| |
| Extract = CGF.Builder.CreateCall(ObjCTypes.ExceptionExtractFn, |
| ExceptionData); |
| CGF.Builder.CreateStore(Extract, RethrowPtr); |
| } |
| |
| // Emit the @finally block. |
| CGF.EmitBlock(FinallyBlock); |
| |
| llvm::Value *Rethrow = CGF.Builder.CreateLoad(RethrowPtr); |
| llvm::Value *ZeroPtr = llvm::Constant::getNullValue(ObjCTypes.ObjectPtrTy); |
| |
| llvm::Value *RethrowIsZero = CGF.Builder.CreateICmpEQ(Rethrow, ZeroPtr); |
| |
| llvm::BasicBlock *TryExitBlock = llvm::BasicBlock::Create("tryexit"); |
| llvm::BasicBlock *AfterTryExitBlock = |
| llvm::BasicBlock::Create("aftertryexit"); |
| |
| CGF.Builder.CreateCondBr(RethrowIsZero, TryExitBlock, AfterTryExitBlock); |
| CGF.EmitBlock(TryExitBlock); |
| CGF.Builder.CreateCall(ObjCTypes.ExceptionTryExitFn, ExceptionData); |
| CGF.EmitBlock(AfterTryExitBlock); |
| |
| if (const ObjCAtFinallyStmt* FinallyStmt = S.getFinallyStmt()) |
| CGF.EmitStmt(FinallyStmt->getFinallyBody()); |
| |
| llvm::Value *RethrowIsNotZero = CGF.Builder.CreateICmpNE(Rethrow, ZeroPtr); |
| |
| llvm::BasicBlock *RethrowBlock = llvm::BasicBlock::Create("rethrow"); |
| llvm::BasicBlock *FinallyEndBlock = llvm::BasicBlock::Create("finallyend"); |
| |
| // If necessary, rethrow the exception. |
| CGF.Builder.CreateCondBr(RethrowIsNotZero, RethrowBlock, FinallyEndBlock); |
| CGF.EmitBlock(RethrowBlock); |
| CGF.Builder.CreateCall(ObjCTypes.ExceptionThrowFn, Rethrow); |
| CGF.EmitBlock(FinallyEndBlock); |
| } |
| |
| void CGObjCMac::EmitThrowStmt(CodeGen::CodeGenFunction &CGF, |
| const ObjCAtThrowStmt &S) |
| { |
| llvm::Value *ExceptionAsObject; |
| |
| if (const Expr *ThrowExpr = S.getThrowExpr()) { |
| llvm::Value *Exception = CGF.EmitScalarExpr(ThrowExpr); |
| ExceptionAsObject = |
| CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy, "tmp"); |
| } else { |
| assert(0 && "FIXME: rethrows not supported!"); |
| } |
| |
| CGF.Builder.CreateCall(ObjCTypes.ExceptionThrowFn, ExceptionAsObject); |
| CGF.Builder.CreateUnreachable(); |
| CGF.EmitBlock(llvm::BasicBlock::Create("bb")); |
| } |
| |
| /* *** Private Interface *** */ |
| |
| /// EmitImageInfo - Emit the image info marker used to encode some module |
| /// level information. |
| /// |
| /// See: <rdr://4810609&4810587&4810587> |
| /// struct IMAGE_INFO { |
| /// unsigned version; |
| /// unsigned flags; |
| /// }; |
| enum ImageInfoFlags { |
| eImageInfo_FixAndContinue = (1 << 0), // FIXME: Not sure what this implies |
| eImageInfo_GarbageCollected = (1 << 1), |
| eImageInfo_GCOnly = (1 << 2) |
| }; |
| |
| void CGObjCMac::EmitImageInfo() { |
| unsigned version = 0; // Version is unused? |
| unsigned flags = 0; |
| |
| // FIXME: Fix and continue? |
| if (CGM.getLangOptions().getGCMode() != LangOptions::NonGC) |
| flags |= eImageInfo_GarbageCollected; |
| if (CGM.getLangOptions().getGCMode() == LangOptions::GCOnly) |
| flags |= eImageInfo_GCOnly; |
| |
| // Emitted as int[2]; |
| llvm::Constant *values[2] = { |
| llvm::ConstantInt::get(llvm::Type::Int32Ty, version), |
| llvm::ConstantInt::get(llvm::Type::Int32Ty, flags) |
| }; |
| llvm::ArrayType *AT = llvm::ArrayType::get(llvm::Type::Int32Ty, 2); |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(AT, true, |
| llvm::GlobalValue::InternalLinkage, |
| llvm::ConstantArray::get(AT, values, 2), |
| "\01L_OBJC_IMAGE_INFO", |
| &CGM.getModule()); |
| |
| if (ObjCABI == 1) { |
| GV->setSection("__OBJC, __image_info,regular"); |
| } else { |
| GV->setSection("__DATA, __objc_imageinfo, regular, no_dead_strip"); |
| } |
| |
| UsedGlobals.push_back(GV); |
| } |
| |
| |
| // struct objc_module { |
| // unsigned long version; |
| // unsigned long size; |
| // const char *name; |
| // Symtab symtab; |
| // }; |
| |
| // FIXME: Get from somewhere |
| static const int ModuleVersion = 7; |
| |
| void CGObjCMac::EmitModuleInfo() { |
| uint64_t Size = CGM.getTargetData().getABITypeSize(ObjCTypes.ModuleTy); |
| |
| std::vector<llvm::Constant*> Values(4); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.LongTy, ModuleVersion); |
| Values[1] = llvm::ConstantInt::get(ObjCTypes.LongTy, Size); |
| // This used to be the filename, now it is unused. <rdr://4327263> |
| Values[2] = GetClassName(&CGM.getContext().Idents.get("")); |
| Values[3] = EmitModuleSymbols(); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(ObjCTypes.ModuleTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| llvm::ConstantStruct::get(ObjCTypes.ModuleTy, |
| Values), |
| "\01L_OBJC_MODULES", |
| &CGM.getModule()); |
| GV->setSection("__OBJC,__module_info,regular,no_dead_strip"); |
| UsedGlobals.push_back(GV); |
| } |
| |
| llvm::Constant *CGObjCMac::EmitModuleSymbols() { |
| unsigned NumClasses = DefinedClasses.size(); |
| unsigned NumCategories = DefinedCategories.size(); |
| |
| // Return null if no symbols were defined. |
| if (!NumClasses && !NumCategories) |
| return llvm::Constant::getNullValue(ObjCTypes.SymtabPtrTy); |
| |
| std::vector<llvm::Constant*> Values(5); |
| Values[0] = llvm::ConstantInt::get(ObjCTypes.LongTy, 0); |
| Values[1] = llvm::Constant::getNullValue(ObjCTypes.SelectorPtrTy); |
| Values[2] = llvm::ConstantInt::get(ObjCTypes.ShortTy, NumClasses); |
| Values[3] = llvm::ConstantInt::get(ObjCTypes.ShortTy, NumCategories); |
| |
| // The runtime expects exactly the list of defined classes followed |
| // by the list of defined categories, in a single array. |
| std::vector<llvm::Constant*> Symbols(NumClasses + NumCategories); |
| for (unsigned i=0; i<NumClasses; i++) |
| Symbols[i] = llvm::ConstantExpr::getBitCast(DefinedClasses[i], |
| ObjCTypes.Int8PtrTy); |
| for (unsigned i=0; i<NumCategories; i++) |
| Symbols[NumClasses + i] = |
| llvm::ConstantExpr::getBitCast(DefinedCategories[i], |
| ObjCTypes.Int8PtrTy); |
| |
| Values[4] = |
| llvm::ConstantArray::get(llvm::ArrayType::get(ObjCTypes.Int8PtrTy, |
| NumClasses + NumCategories), |
| Symbols); |
| |
| llvm::Constant *Init = llvm::ConstantStruct::get(Values); |
| |
| llvm::GlobalVariable *GV = |
| new llvm::GlobalVariable(Init->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| Init, |
| "\01L_OBJC_SYMBOLS", |
| &CGM.getModule()); |
| GV->setSection("__OBJC,__symbols,regular,no_dead_strip"); |
| UsedGlobals.push_back(GV); |
| return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.SymtabPtrTy); |
| } |
| |
| llvm::Value *CGObjCMac::EmitClassRef(llvm::IRBuilder<> &Builder, |
| const ObjCInterfaceDecl *ID) { |
| LazySymbols.insert(ID->getIdentifier()); |
| |
| llvm::GlobalVariable *&Entry = ClassReferences[ID->getIdentifier()]; |
| |
| if (!Entry) { |
| llvm::Constant *Casted = |
| llvm::ConstantExpr::getBitCast(GetClassName(ID->getIdentifier()), |
| ObjCTypes.ClassPtrTy); |
| Entry = |
| new llvm::GlobalVariable(ObjCTypes.ClassPtrTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Casted, "\01L_OBJC_CLASS_REFERENCES_", |
| &CGM.getModule()); |
| Entry->setSection("__OBJC,__cls_refs,literal_pointers,no_dead_strip"); |
| UsedGlobals.push_back(Entry); |
| } |
| |
| return Builder.CreateLoad(Entry, false, "tmp"); |
| } |
| |
| llvm::Value *CGObjCMac::EmitSelector(llvm::IRBuilder<> &Builder, Selector Sel) { |
| llvm::GlobalVariable *&Entry = SelectorReferences[Sel]; |
| |
| if (!Entry) { |
| llvm::Constant *Casted = |
| llvm::ConstantExpr::getBitCast(GetMethodVarName(Sel), |
| ObjCTypes.SelectorPtrTy); |
| Entry = |
| new llvm::GlobalVariable(ObjCTypes.SelectorPtrTy, false, |
| llvm::GlobalValue::InternalLinkage, |
| Casted, "\01L_OBJC_SELECTOR_REFERENCES_", |
| &CGM.getModule()); |
| Entry->setSection("__OBJC,__message_refs,literal_pointers,no_dead_strip"); |
| UsedGlobals.push_back(Entry); |
| } |
| |
| return Builder.CreateLoad(Entry, false, "tmp"); |
| } |
| |
| llvm::Constant *CGObjCMac::GetClassName(IdentifierInfo *Ident) { |
| llvm::GlobalVariable *&Entry = ClassNames[Ident]; |
| |
| if (!Entry) { |
| llvm::Constant *C = llvm::ConstantArray::get(Ident->getName()); |
| Entry = |
| new llvm::GlobalVariable(C->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| C, "\01L_OBJC_CLASS_NAME_", |
| &CGM.getModule()); |
| Entry->setSection("__TEXT,__cstring,cstring_literals"); |
| UsedGlobals.push_back(Entry); |
| } |
| |
| return getConstantGEP(Entry, 0, 0); |
| } |
| |
| llvm::Constant *CGObjCMac::GetMethodVarName(Selector Sel) { |
| llvm::GlobalVariable *&Entry = MethodVarNames[Sel]; |
| |
| if (!Entry) { |
| llvm::Constant *C = llvm::ConstantArray::get(Sel.getName()); |
| Entry = |
| new llvm::GlobalVariable(C->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| C, "\01L_OBJC_METH_VAR_NAME_", |
| &CGM.getModule()); |
| Entry->setSection("__TEXT,__cstring,cstring_literals"); |
| UsedGlobals.push_back(Entry); |
| } |
| |
| return getConstantGEP(Entry, 0, 0); |
| } |
| |
| // FIXME: Merge into a single cstring creation function. |
| llvm::Constant *CGObjCMac::GetMethodVarName(IdentifierInfo *ID) { |
| return GetMethodVarName(CGM.getContext().Selectors.getNullarySelector(ID)); |
| } |
| |
| // FIXME: Merge into a single cstring creation function. |
| llvm::Constant *CGObjCMac::GetMethodVarName(const std::string &Name) { |
| return GetMethodVarName(&CGM.getContext().Idents.get(Name)); |
| } |
| |
| llvm::Constant *CGObjCMac::GetMethodVarType(const std::string &Name) { |
| llvm::GlobalVariable *&Entry = MethodVarTypes[Name]; |
| |
| if (!Entry) { |
| llvm::Constant *C = llvm::ConstantArray::get(Name); |
| Entry = |
| new llvm::GlobalVariable(C->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| C, "\01L_OBJC_METH_VAR_TYPE_", |
| &CGM.getModule()); |
| Entry->setSection("__TEXT,__cstring,cstring_literals"); |
| UsedGlobals.push_back(Entry); |
| } |
| |
| return getConstantGEP(Entry, 0, 0); |
| } |
| |
| // FIXME: Merge into a single cstring creation function. |
| llvm::Constant *CGObjCMac::GetMethodVarType(const ObjCMethodDecl *D) { |
| std::string TypeStr; |
| CGM.getContext().getObjCEncodingForMethodDecl(const_cast<ObjCMethodDecl*>(D), |
| TypeStr); |
| return GetMethodVarType(TypeStr); |
| } |
| |
| // FIXME: Merge into a single cstring creation function. |
| llvm::Constant *CGObjCMac::GetPropertyName(IdentifierInfo *Ident) { |
| llvm::GlobalVariable *&Entry = PropertyNames[Ident]; |
| |
| if (!Entry) { |
| llvm::Constant *C = llvm::ConstantArray::get(Ident->getName()); |
| Entry = |
| new llvm::GlobalVariable(C->getType(), false, |
| llvm::GlobalValue::InternalLinkage, |
| C, "\01L_OBJC_PROP_NAME_ATTR_", |
| &CGM.getModule()); |
| Entry->setSection("__TEXT,__cstring,cstring_literals"); |
| UsedGlobals.push_back(Entry); |
| } |
| |
| return getConstantGEP(Entry, 0, 0); |
| } |
| |
| // FIXME: Merge into a single cstring creation function. |
| // FIXME: This Decl should be more precise. |
| llvm::Constant *CGObjCMac::GetPropertyTypeString(const ObjCPropertyDecl *PD, |
| const Decl *Container) { |
| std::string TypeStr; |
| CGM.getContext().getObjCEncodingForPropertyDecl(PD, Container, TypeStr); |
| return GetPropertyName(&CGM.getContext().Idents.get(TypeStr)); |
| } |
| |
| void CGObjCMac::GetNameForMethod(const ObjCMethodDecl *D, |
| std::string &NameOut) { |
| // FIXME: Find the mangling GCC uses. |
| std::stringstream s; |
| s << (D->isInstance() ? "-" : "+"); |
| s << "["; |
| s << D->getClassInterface()->getName(); |
| s << " "; |
| s << D->getSelector().getName(); |
| s << "]"; |
| NameOut = s.str(); |
| } |
| |
| void CGObjCMac::FinishModule() { |
| EmitModuleInfo(); |
| |
| std::vector<llvm::Constant*> Used; |
| |
| for (std::vector<llvm::GlobalVariable*>::iterator i = UsedGlobals.begin(), |
| e = UsedGlobals.end(); i != e; ++i) { |
| Used.push_back(llvm::ConstantExpr::getBitCast(*i, ObjCTypes.Int8PtrTy)); |
| } |
| |
| llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.Int8PtrTy, Used.size()); |
| llvm::GlobalValue *GV = |
| new llvm::GlobalVariable(AT, false, |
| llvm::GlobalValue::AppendingLinkage, |
| llvm::ConstantArray::get(AT, Used), |
| "llvm.used", |
| &CGM.getModule()); |
| |
| GV->setSection("llvm.metadata"); |
| |
| // Add assembler directives to add lazy undefined symbol references |
| // for classes which are referenced but not defined. This is |
| // important for correct linker interaction. |
| |
| // FIXME: Uh, this isn't particularly portable. |
| std::stringstream s; |
| for (std::set<IdentifierInfo*>::iterator i = LazySymbols.begin(), |
| e = LazySymbols.end(); i != e; ++i) { |
| s << "\t.lazy_reference .objc_class_name_" << (*i)->getName() << "\n"; |
| } |
| for (std::set<IdentifierInfo*>::iterator i = DefinedSymbols.begin(), |
| e = DefinedSymbols.end(); i != e; ++i) { |
| s << "\t.objc_class_name_" << (*i)->getName() << "=0\n" |
| << "\t.globl .objc_class_name_" << (*i)->getName() << "\n"; |
| } |
| CGM.getModule().appendModuleInlineAsm(s.str()); |
| } |
| |
| /* *** */ |
| |
| ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm) |
| : CGM(cgm) |
| { |
| CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
| ASTContext &Ctx = CGM.getContext(); |
| |
| ShortTy = Types.ConvertType(Ctx.ShortTy); |
| IntTy = Types.ConvertType(Ctx.IntTy); |
| LongTy = Types.ConvertType(Ctx.LongTy); |
| Int8PtrTy = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); |
| |
| ObjectPtrTy = Types.ConvertType(Ctx.getObjCIdType()); |
| SelectorPtrTy = Types.ConvertType(Ctx.getObjCSelType()); |
| |
| // FIXME: It would be nice to unify this with the opaque type, so |
| // that the IR comes out a bit cleaner. |
| const llvm::Type *T = Types.ConvertType(Ctx.getObjCProtoType()); |
| ExternalProtocolPtrTy = llvm::PointerType::getUnqual(T); |
| |
| MethodDescriptionTy = |
| llvm::StructType::get(SelectorPtrTy, |
| Int8PtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_method_description", |
| MethodDescriptionTy); |
| |
| MethodDescriptionListTy = |
| llvm::StructType::get(IntTy, |
| llvm::ArrayType::get(MethodDescriptionTy, 0), |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_method_description_list", |
| MethodDescriptionListTy); |
| MethodDescriptionListPtrTy = |
| llvm::PointerType::getUnqual(MethodDescriptionListTy); |
| |
| PropertyTy = llvm::StructType::get(Int8PtrTy, |
| Int8PtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_property", |
| PropertyTy); |
| |
| PropertyListTy = llvm::StructType::get(IntTy, |
| IntTy, |
| llvm::ArrayType::get(PropertyTy, 0), |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_property_list", |
| PropertyListTy); |
| PropertyListPtrTy = llvm::PointerType::getUnqual(PropertyListTy); |
| |
| // Protocol description structures |
| |
| ProtocolExtensionTy = |
| llvm::StructType::get(Types.ConvertType(Ctx.IntTy), |
| llvm::PointerType::getUnqual(MethodDescriptionListTy), |
| llvm::PointerType::getUnqual(MethodDescriptionListTy), |
| PropertyListPtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_protocol_extension", |
| ProtocolExtensionTy); |
| ProtocolExtensionPtrTy = llvm::PointerType::getUnqual(ProtocolExtensionTy); |
| |
| // Handle recursive construction of Protocl and ProtocolList types |
| |
| llvm::PATypeHolder ProtocolTyHolder = llvm::OpaqueType::get(); |
| llvm::PATypeHolder ProtocolListTyHolder = llvm::OpaqueType::get(); |
| |
| T = llvm::StructType::get(llvm::PointerType::getUnqual(ProtocolListTyHolder), |
| LongTy, |
| llvm::ArrayType::get(ProtocolTyHolder, 0), |
| NULL); |
| cast<llvm::OpaqueType>(ProtocolListTyHolder.get())->refineAbstractTypeTo(T); |
| |
| T = llvm::StructType::get(llvm::PointerType::getUnqual(ProtocolExtensionTy), |
| Int8PtrTy, |
| llvm::PointerType::getUnqual(ProtocolListTyHolder), |
| MethodDescriptionListPtrTy, |
| MethodDescriptionListPtrTy, |
| NULL); |
| cast<llvm::OpaqueType>(ProtocolTyHolder.get())->refineAbstractTypeTo(T); |
| |
| ProtocolListTy = cast<llvm::StructType>(ProtocolListTyHolder.get()); |
| CGM.getModule().addTypeName("struct._objc_protocol_list", |
| ProtocolListTy); |
| ProtocolListPtrTy = llvm::PointerType::getUnqual(ProtocolListTy); |
| |
| ProtocolTy = cast<llvm::StructType>(ProtocolTyHolder.get()); |
| CGM.getModule().addTypeName("struct.__objc_protocol", ProtocolTy); |
| ProtocolPtrTy = llvm::PointerType::getUnqual(ProtocolTy); |
| |
| // Class description structures |
| |
| IvarTy = llvm::StructType::get(Int8PtrTy, |
| Int8PtrTy, |
| IntTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_ivar", IvarTy); |
| |
| IvarListTy = llvm::OpaqueType::get(); |
| CGM.getModule().addTypeName("struct._objc_ivar_list", IvarListTy); |
| IvarListPtrTy = llvm::PointerType::getUnqual(IvarListTy); |
| |
| MethodTy = llvm::StructType::get(SelectorPtrTy, |
| Int8PtrTy, |
| Int8PtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_method", MethodTy); |
| |
| MethodListTy = llvm::OpaqueType::get(); |
| CGM.getModule().addTypeName("struct._objc_method_list", MethodListTy); |
| MethodListPtrTy = llvm::PointerType::getUnqual(MethodListTy); |
| |
| CacheTy = llvm::OpaqueType::get(); |
| CGM.getModule().addTypeName("struct._objc_cache", CacheTy); |
| CachePtrTy = llvm::PointerType::getUnqual(CacheTy); |
| |
| ClassExtensionTy = |
| llvm::StructType::get(IntTy, |
| Int8PtrTy, |
| PropertyListPtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_class_extension", ClassExtensionTy); |
| ClassExtensionPtrTy = llvm::PointerType::getUnqual(ClassExtensionTy); |
| |
| llvm::PATypeHolder ClassTyHolder = llvm::OpaqueType::get(); |
| |
| T = llvm::StructType::get(llvm::PointerType::getUnqual(ClassTyHolder), |
| llvm::PointerType::getUnqual(ClassTyHolder), |
| Int8PtrTy, |
| LongTy, |
| LongTy, |
| LongTy, |
| IvarListPtrTy, |
| MethodListPtrTy, |
| CachePtrTy, |
| ProtocolListPtrTy, |
| Int8PtrTy, |
| ClassExtensionPtrTy, |
| NULL); |
| cast<llvm::OpaqueType>(ClassTyHolder.get())->refineAbstractTypeTo(T); |
| |
| ClassTy = cast<llvm::StructType>(ClassTyHolder.get()); |
| CGM.getModule().addTypeName("struct._objc_class", ClassTy); |
| ClassPtrTy = llvm::PointerType::getUnqual(ClassTy); |
| |
| CategoryTy = llvm::StructType::get(Int8PtrTy, |
| Int8PtrTy, |
| MethodListPtrTy, |
| MethodListPtrTy, |
| ProtocolListPtrTy, |
| IntTy, |
| PropertyListPtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_category", CategoryTy); |
| |
| // I'm not sure I like this. The implicit coordination is a bit |
| // gross. We should solve this in a reasonable fashion because this |
| // is a pretty common task (match some runtime data structure with |
| // an LLVM data structure). |
| |
| // FIXME: This is leaked. |
| // FIXME: Merge with rewriter code? |
| RecordDecl *RD = RecordDecl::Create(Ctx, TagDecl::TK_struct, 0, |
| SourceLocation(), |
| &Ctx.Idents.get("_objc_super")); |
| FieldDecl *FieldDecls[2]; |
| FieldDecls[0] = FieldDecl::Create(Ctx, SourceLocation(), 0, |
| Ctx.getObjCIdType()); |
| FieldDecls[1] = FieldDecl::Create(Ctx, SourceLocation(), 0, |
| Ctx.getObjCClassType()); |
| RD->defineBody(Ctx, FieldDecls, 2); |
| |
| SuperCTy = Ctx.getTagDeclType(RD); |
| SuperPtrCTy = Ctx.getPointerType(SuperCTy); |
| |
| SuperTy = cast<llvm::StructType>(Types.ConvertType(SuperCTy)); |
| SuperPtrTy = llvm::PointerType::getUnqual(SuperTy); |
| |
| // Global metadata structures |
| |
| SymtabTy = llvm::StructType::get(LongTy, |
| SelectorPtrTy, |
| ShortTy, |
| ShortTy, |
| llvm::ArrayType::get(Int8PtrTy, 0), |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_symtab", SymtabTy); |
| SymtabPtrTy = llvm::PointerType::getUnqual(SymtabTy); |
| |
| ModuleTy = |
| llvm::StructType::get(LongTy, |
| LongTy, |
| Int8PtrTy, |
| SymtabPtrTy, |
| NULL); |
| CGM.getModule().addTypeName("struct._objc_module", ModuleTy); |
| |
| // Message send functions. |
| |
| std::vector<const llvm::Type*> Params; |
| Params.push_back(ObjectPtrTy); |
| Params.push_back(SelectorPtrTy); |
| MessageSendFn = llvm::Function::Create(llvm::FunctionType::get(ObjectPtrTy, |
| Params, |
| true), |
| llvm::Function::ExternalLinkage, |
| "objc_msgSend", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(Int8PtrTy); |
| Params.push_back(ObjectPtrTy); |
| Params.push_back(SelectorPtrTy); |
| MessageSendStretFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| true), |
| llvm::Function::ExternalLinkage, |
| "objc_msgSend_stret", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(SuperPtrTy); |
| Params.push_back(SelectorPtrTy); |
| MessageSendSuperFn = |
| llvm::Function::Create(llvm::FunctionType::get(ObjectPtrTy, |
| Params, |
| true), |
| llvm::Function::ExternalLinkage, |
| "objc_msgSendSuper", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(Int8PtrTy); |
| Params.push_back(SuperPtrTy); |
| Params.push_back(SelectorPtrTy); |
| MessageSendSuperStretFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| true), |
| llvm::Function::ExternalLinkage, |
| "objc_msgSendSuper_stret", |
| &CGM.getModule()); |
| |
| // Property manipulation functions. |
| |
| Params.clear(); |
| Params.push_back(ObjectPtrTy); |
| Params.push_back(SelectorPtrTy); |
| Params.push_back(LongTy); |
| Params.push_back(Types.ConvertTypeForMem(Ctx.BoolTy)); |
| GetPropertyFn = |
| llvm::Function::Create(llvm::FunctionType::get(ObjectPtrTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_getProperty", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(ObjectPtrTy); |
| Params.push_back(SelectorPtrTy); |
| Params.push_back(LongTy); |
| Params.push_back(ObjectPtrTy); |
| Params.push_back(Types.ConvertTypeForMem(Ctx.BoolTy)); |
| Params.push_back(Types.ConvertTypeForMem(Ctx.BoolTy)); |
| SetPropertyFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_setProperty", |
| &CGM.getModule()); |
| |
| // Enumeration mutation. |
| |
| Params.clear(); |
| Params.push_back(ObjectPtrTy); |
| EnumerationMutationFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_enumerationMutation", |
| &CGM.getModule()); |
| |
| // FIXME: This is the size of the setjmp buffer and should be |
| // target specific. 18 is what's used on 32-bit X86. |
| uint64_t SetJmpBufferSize = 18; |
| |
| // Exceptions |
| const llvm::Type *StackPtrTy = |
| llvm::ArrayType::get(llvm::PointerType::getUnqual(llvm::Type::Int8Ty), 4); |
| |
| ExceptionDataTy = |
| llvm::StructType::get(llvm::ArrayType::get(llvm::Type::Int32Ty, |
| SetJmpBufferSize), |
| StackPtrTy, NULL); |
| CGM.getModule().addTypeName("struct._objc_exception_data", |
| ExceptionDataTy); |
| |
| Params.clear(); |
| Params.push_back(ObjectPtrTy); |
| ExceptionThrowFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_exception_throw", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(llvm::PointerType::getUnqual(ExceptionDataTy)); |
| ExceptionTryEnterFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_exception_try_enter", |
| &CGM.getModule()); |
| ExceptionTryExitFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::VoidTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_exception_try_exit", |
| &CGM.getModule()); |
| ExceptionExtractFn = |
| llvm::Function::Create(llvm::FunctionType::get(ObjectPtrTy, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_exception_extract", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(ClassPtrTy); |
| Params.push_back(ObjectPtrTy); |
| ExceptionMatchFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::Int32Ty, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "objc_exception_match", |
| &CGM.getModule()); |
| |
| Params.clear(); |
| Params.push_back(llvm::PointerType::getUnqual(llvm::Type::Int32Ty)); |
| SetJmpFn = |
| llvm::Function::Create(llvm::FunctionType::get(llvm::Type::Int32Ty, |
| Params, |
| false), |
| llvm::Function::ExternalLinkage, |
| "_setjmp", |
| &CGM.getModule()); |
| |
| } |
| |
| ObjCTypesHelper::~ObjCTypesHelper() { |
| } |
| |
| llvm::Constant *ObjCTypesHelper::getMessageSendFn(bool IsSuper, bool IsStret) { |
| if (IsStret) { |
| return IsSuper ? MessageSendSuperStretFn : MessageSendStretFn; |
| } else { // FIXME: floating point? |
| return IsSuper ? MessageSendSuperFn : MessageSendFn; |
| } |
| } |
| |
| /* *** */ |
| |
| CodeGen::CGObjCRuntime * |
| CodeGen::CreateMacObjCRuntime(CodeGen::CodeGenModule &CGM) { |
| return new CGObjCMac(CGM); |
| } |