Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1 | //===------- CGObjCGNU.cpp - Emit LLVM Code from ASTs for a Module --------===// |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 10 | // This provides Objective-C code generation targetting the GNU runtime. The |
| 11 | // class in this file generates structures used by the GNU Objective-C runtime |
| 12 | // library. These structures are defined in objc/objc.h and objc/objc-api.h in |
| 13 | // the GNU runtime distribution. |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 14 | // |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | |
| 17 | #include "CGObjCRuntime.h" |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 18 | #include "CodeGenModule.h" |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 19 | #include "CodeGenFunction.h" |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 20 | |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 21 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 22 | #include "clang/AST/Decl.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 23 | #include "clang/AST/DeclObjC.h" |
Daniel Dunbar | 2bebbf0 | 2009-05-03 10:46:44 +0000 | [diff] [blame] | 24 | #include "clang/AST/RecordLayout.h" |
Chris Lattner | 16f0049 | 2009-04-26 01:32:48 +0000 | [diff] [blame] | 25 | #include "clang/AST/StmtObjC.h" |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 26 | |
| 27 | #include "llvm/Intrinsics.h" |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 28 | #include "llvm/Module.h" |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 29 | #include "llvm/ADT/SmallVector.h" |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 30 | #include "llvm/ADT/StringMap.h" |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 31 | #include "llvm/Support/Compiler.h" |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 32 | #include "llvm/Target/TargetData.h" |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 33 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 34 | #include <map> |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 35 | |
| 36 | |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 37 | using namespace clang; |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 38 | using namespace CodeGen; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 39 | using llvm::dyn_cast; |
| 40 | |
| 41 | // The version of the runtime that this class targets. Must match the version |
| 42 | // in the runtime. |
| 43 | static const int RuntimeVersion = 8; |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 44 | static const int NonFragileRuntimeVersion = 9; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 45 | static const int ProtocolVersion = 2; |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 46 | |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 47 | namespace { |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 48 | class CGObjCGNU : public CodeGen::CGObjCRuntime { |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 49 | private: |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 50 | CodeGen::CodeGenModule &CGM; |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 51 | llvm::Module &TheModule; |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 52 | const llvm::PointerType *SelectorTy; |
| 53 | const llvm::PointerType *PtrToInt8Ty; |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 54 | const llvm::FunctionType *IMPTy; |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 55 | const llvm::PointerType *IdTy; |
| 56 | const llvm::IntegerType *IntTy; |
| 57 | const llvm::PointerType *PtrTy; |
| 58 | const llvm::IntegerType *LongTy; |
| 59 | const llvm::PointerType *PtrToIntTy; |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 60 | llvm::GlobalAlias *ClassPtrAlias; |
| 61 | llvm::GlobalAlias *MetaClassPtrAlias; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 62 | std::vector<llvm::Constant*> Classes; |
| 63 | std::vector<llvm::Constant*> Categories; |
| 64 | std::vector<llvm::Constant*> ConstantStrings; |
| 65 | llvm::Function *LoadFunction; |
| 66 | llvm::StringMap<llvm::Constant*> ExistingProtocols; |
| 67 | typedef std::pair<std::string, std::string> TypedSelector; |
| 68 | std::map<TypedSelector, llvm::GlobalAlias*> TypedSelectors; |
| 69 | llvm::StringMap<llvm::GlobalAlias*> UntypedSelectors; |
| 70 | // Some zeros used for GEPs in lots of places. |
| 71 | llvm::Constant *Zeros[2]; |
| 72 | llvm::Constant *NULLPtr; |
| 73 | private: |
| 74 | llvm::Constant *GenerateIvarList( |
| 75 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, |
| 76 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, |
| 77 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets); |
| 78 | llvm::Constant *GenerateMethodList(const std::string &ClassName, |
| 79 | const std::string &CategoryName, |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 80 | const llvm::SmallVectorImpl<Selector> &MethodSels, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 81 | const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes, |
| 82 | bool isClassMethodList); |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 83 | llvm::Constant *GenerateEmptyProtocol(const std::string &ProtocolName); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 84 | llvm::Constant *GenerateProtocolList( |
| 85 | const llvm::SmallVectorImpl<std::string> &Protocols); |
| 86 | llvm::Constant *GenerateClassStructure( |
| 87 | llvm::Constant *MetaClass, |
| 88 | llvm::Constant *SuperClass, |
| 89 | unsigned info, |
Chris Lattner | d002cc6 | 2008-06-26 04:47:04 +0000 | [diff] [blame] | 90 | const char *Name, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 91 | llvm::Constant *Version, |
| 92 | llvm::Constant *InstanceSize, |
| 93 | llvm::Constant *IVars, |
| 94 | llvm::Constant *Methods, |
| 95 | llvm::Constant *Protocols); |
| 96 | llvm::Constant *GenerateProtocolMethodList( |
| 97 | const llvm::SmallVectorImpl<llvm::Constant *> &MethodNames, |
| 98 | const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes); |
| 99 | llvm::Constant *MakeConstantString(const std::string &Str, const std::string |
| 100 | &Name=""); |
| 101 | llvm::Constant *MakeGlobal(const llvm::StructType *Ty, |
| 102 | std::vector<llvm::Constant*> &V, const std::string &Name=""); |
| 103 | llvm::Constant *MakeGlobal(const llvm::ArrayType *Ty, |
| 104 | std::vector<llvm::Constant*> &V, const std::string &Name=""); |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 105 | llvm::GlobalVariable *ObjCIvarOffsetVariable(const ObjCInterfaceDecl *ID, |
| 106 | const ObjCIvarDecl *Ivar); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 107 | void EmitClassRef(const std::string &className); |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 108 | public: |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 109 | CGObjCGNU(CodeGen::CodeGenModule &cgm); |
Steve Naroff | 33fdb73 | 2009-03-31 16:53:37 +0000 | [diff] [blame] | 110 | virtual llvm::Constant *GenerateConstantString(const ObjCStringLiteral *); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 111 | virtual CodeGen::RValue |
| 112 | GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 7f8ea5c | 2008-08-30 05:35:15 +0000 | [diff] [blame] | 113 | QualType ResultType, |
| 114 | Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 115 | llvm::Value *Receiver, |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 116 | bool IsClassMessage, |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 117 | const CallArgList &CallArgs, |
| 118 | const ObjCMethodDecl *Method); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 119 | virtual CodeGen::RValue |
| 120 | GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 7f8ea5c | 2008-08-30 05:35:15 +0000 | [diff] [blame] | 121 | QualType ResultType, |
| 122 | Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 123 | const ObjCInterfaceDecl *Class, |
Fariborz Jahanian | 7ce7792 | 2009-02-28 20:07:56 +0000 | [diff] [blame] | 124 | bool isCategoryImpl, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 125 | llvm::Value *Receiver, |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 126 | bool IsClassMessage, |
| 127 | const CallArgList &CallArgs); |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 128 | virtual llvm::Value *GetClass(CGBuilderTy &Builder, |
Daniel Dunbar | ddb2a3d | 2008-08-16 00:25:02 +0000 | [diff] [blame] | 129 | const ObjCInterfaceDecl *OID); |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 130 | virtual llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel); |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 131 | virtual llvm::Value *GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl |
| 132 | *Method); |
Chris Lattner | 8e67b63 | 2008-06-26 04:37:12 +0000 | [diff] [blame] | 133 | |
Fariborz Jahanian | 679a502 | 2009-01-10 21:06:09 +0000 | [diff] [blame] | 134 | virtual llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD, |
| 135 | const ObjCContainerDecl *CD); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 136 | virtual void GenerateCategory(const ObjCCategoryImplDecl *CMD); |
| 137 | virtual void GenerateClass(const ObjCImplementationDecl *ClassDecl); |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 138 | virtual llvm::Value *GenerateProtocolRef(CGBuilderTy &Builder, |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 139 | const ObjCProtocolDecl *PD); |
| 140 | virtual void GenerateProtocol(const ObjCProtocolDecl *PD); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 141 | virtual llvm::Function *ModuleInitFunction(); |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 142 | virtual void MergeMetadataGlobals(std::vector<llvm::Constant*> &UsedArray); |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 143 | virtual llvm::Function *GetPropertyGetFunction(); |
| 144 | virtual llvm::Function *GetPropertySetFunction(); |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 145 | virtual llvm::Function *EnumerationMutationFunction(); |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 146 | |
Fariborz Jahanian | bd71be4 | 2008-11-21 00:49:24 +0000 | [diff] [blame] | 147 | virtual void EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF, |
| 148 | const Stmt &S); |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 149 | virtual void EmitThrowStmt(CodeGen::CodeGenFunction &CGF, |
| 150 | const ObjCAtThrowStmt &S); |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 151 | virtual llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF, |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 152 | llvm::Value *AddrWeakObj); |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 153 | virtual void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF, |
| 154 | llvm::Value *src, llvm::Value *dst); |
Fariborz Jahanian | 5862650 | 2008-11-19 00:59:10 +0000 | [diff] [blame] | 155 | virtual void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF, |
| 156 | llvm::Value *src, llvm::Value *dest); |
Fariborz Jahanian | 7eda836 | 2008-11-20 19:23:36 +0000 | [diff] [blame] | 157 | virtual void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF, |
| 158 | llvm::Value *src, llvm::Value *dest); |
Fariborz Jahanian | 5862650 | 2008-11-19 00:59:10 +0000 | [diff] [blame] | 159 | virtual void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF, |
| 160 | llvm::Value *src, llvm::Value *dest); |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 161 | virtual LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, |
| 162 | QualType ObjectTy, |
| 163 | llvm::Value *BaseValue, |
| 164 | const ObjCIvarDecl *Ivar, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 165 | unsigned CVRQualifiers); |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 166 | virtual llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame] | 167 | const ObjCInterfaceDecl *Interface, |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 168 | const ObjCIvarDecl *Ivar); |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 169 | }; |
| 170 | } // end anonymous namespace |
| 171 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 172 | |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 173 | /// Emits a reference to a dummy variable which is emitted with each class. |
| 174 | /// This ensures that a linker error will be generated when trying to link |
| 175 | /// together modules where a referenced class is not defined. |
| 176 | void CGObjCGNU::EmitClassRef(const std::string &className){ |
| 177 | std::string symbolRef = "__objc_class_ref_" + className; |
| 178 | // Don't emit two copies of the same symbol |
| 179 | if (TheModule.getGlobalVariable(symbolRef)) return; |
| 180 | std::string symbolName = "__objc_class_name_" + className; |
| 181 | llvm::GlobalVariable *ClassSymbol = TheModule.getGlobalVariable(symbolName); |
| 182 | if (!ClassSymbol) { |
| 183 | ClassSymbol = new llvm::GlobalVariable(LongTy, false, |
| 184 | llvm::GlobalValue::ExternalLinkage, 0, symbolName, &TheModule); |
| 185 | } |
| 186 | new llvm::GlobalVariable(ClassSymbol->getType(), true, |
| 187 | llvm::GlobalValue::CommonLinkage, ClassSymbol, symbolRef, &TheModule); |
| 188 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 189 | |
| 190 | static std::string SymbolNameForClass(const std::string &ClassName) { |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 191 | return "_OBJC_CLASS_" + ClassName; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | static std::string SymbolNameForMethod(const std::string &ClassName, const |
| 195 | std::string &CategoryName, const std::string &MethodName, bool isClassMethod) |
| 196 | { |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 197 | return "_OBJC_METHOD_" + ClassName + "("+CategoryName+")"+ |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 198 | (isClassMethod ? "+" : "-") + MethodName; |
| 199 | } |
| 200 | |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 201 | CGObjCGNU::CGObjCGNU(CodeGen::CodeGenModule &cgm) |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 202 | : CGM(cgm), TheModule(CGM.getModule()), ClassPtrAlias(0), |
| 203 | MetaClassPtrAlias(0) { |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 204 | IntTy = cast<llvm::IntegerType>( |
| 205 | CGM.getTypes().ConvertType(CGM.getContext().IntTy)); |
| 206 | LongTy = cast<llvm::IntegerType>( |
| 207 | CGM.getTypes().ConvertType(CGM.getContext().LongTy)); |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 208 | |
Sebastian Redl | 3a5013c | 2008-12-04 00:10:55 +0000 | [diff] [blame] | 209 | Zeros[0] = llvm::ConstantInt::get(LongTy, 0); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 210 | Zeros[1] = Zeros[0]; |
| 211 | NULLPtr = llvm::ConstantPointerNull::get( |
| 212 | llvm::PointerType::getUnqual(llvm::Type::Int8Ty)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 213 | // C string type. Used in lots of places. |
| 214 | PtrToInt8Ty = |
| 215 | llvm::PointerType::getUnqual(llvm::Type::Int8Ty); |
| 216 | // Get the selector Type. |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 217 | SelectorTy = cast<llvm::PointerType>( |
| 218 | CGM.getTypes().ConvertType(CGM.getContext().getObjCSelType())); |
| 219 | |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 220 | PtrToIntTy = llvm::PointerType::getUnqual(IntTy); |
| 221 | PtrTy = PtrToInt8Ty; |
| 222 | |
| 223 | // Object type |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 224 | IdTy = cast<llvm::PointerType>( |
| 225 | CGM.getTypes().ConvertType(CGM.getContext().getObjCIdType())); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 226 | |
| 227 | // IMP type |
| 228 | std::vector<const llvm::Type*> IMPArgs; |
| 229 | IMPArgs.push_back(IdTy); |
| 230 | IMPArgs.push_back(SelectorTy); |
| 231 | IMPTy = llvm::FunctionType::get(IdTy, IMPArgs, true); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 232 | } |
| 233 | // This has to perform the lookup every time, since posing and related |
| 234 | // techniques can modify the name -> class mapping. |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 235 | llvm::Value *CGObjCGNU::GetClass(CGBuilderTy &Builder, |
Daniel Dunbar | ddb2a3d | 2008-08-16 00:25:02 +0000 | [diff] [blame] | 236 | const ObjCInterfaceDecl *OID) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 237 | llvm::Value *ClassName = CGM.GetAddrOfConstantCString(OID->getNameAsString()); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 238 | EmitClassRef(OID->getNameAsString()); |
Daniel Dunbar | ddb2a3d | 2008-08-16 00:25:02 +0000 | [diff] [blame] | 239 | ClassName = Builder.CreateStructGEP(ClassName, 0); |
| 240 | |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 241 | std::vector<const llvm::Type*> Params(1, PtrToInt8Ty); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 242 | llvm::Constant *ClassLookupFn = |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 243 | CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, |
| 244 | Params, |
| 245 | true), |
| 246 | "objc_lookup_class"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 247 | return Builder.CreateCall(ClassLookupFn, ClassName); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 248 | } |
| 249 | |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 250 | llvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, Selector Sel) { |
Chris Lattner | 077bf5e | 2008-11-24 03:33:13 +0000 | [diff] [blame] | 251 | llvm::GlobalAlias *&US = UntypedSelectors[Sel.getAsString()]; |
Chris Lattner | 8e67b63 | 2008-06-26 04:37:12 +0000 | [diff] [blame] | 252 | if (US == 0) |
| 253 | US = new llvm::GlobalAlias(llvm::PointerType::getUnqual(SelectorTy), |
| 254 | llvm::GlobalValue::InternalLinkage, |
| 255 | ".objc_untyped_selector_alias", |
| 256 | NULL, &TheModule); |
| 257 | |
| 258 | return Builder.CreateLoad(US); |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | llvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl |
| 262 | *Method) { |
| 263 | |
| 264 | std::string SelName = Method->getSelector().getAsString(); |
| 265 | std::string SelTypes; |
| 266 | CGM.getContext().getObjCEncodingForMethodDecl(Method, SelTypes); |
| 267 | // Typed selectors |
| 268 | TypedSelector Selector = TypedSelector(SelName, |
| 269 | SelTypes); |
| 270 | |
| 271 | // If it's already cached, return it. |
| 272 | if (TypedSelectors[Selector]) |
| 273 | { |
| 274 | return Builder.CreateLoad(TypedSelectors[Selector]); |
| 275 | } |
| 276 | |
| 277 | // If it isn't, cache it. |
| 278 | llvm::GlobalAlias *Sel = new llvm::GlobalAlias( |
| 279 | llvm::PointerType::getUnqual(SelectorTy), |
| 280 | llvm::GlobalValue::InternalLinkage, SelName, |
| 281 | NULL, &TheModule); |
| 282 | TypedSelectors[Selector] = Sel; |
| 283 | |
| 284 | return Builder.CreateLoad(Sel); |
Chris Lattner | 8e67b63 | 2008-06-26 04:37:12 +0000 | [diff] [blame] | 285 | } |
| 286 | |
Chris Lattner | 5e7dcc6 | 2008-06-26 04:44:19 +0000 | [diff] [blame] | 287 | llvm::Constant *CGObjCGNU::MakeConstantString(const std::string &Str, |
| 288 | const std::string &Name) { |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 289 | llvm::Constant * ConstStr = llvm::ConstantArray::get(Str); |
| 290 | ConstStr = new llvm::GlobalVariable(ConstStr->getType(), true, |
| 291 | llvm::GlobalValue::InternalLinkage, |
| 292 | ConstStr, Name, &TheModule); |
| 293 | return llvm::ConstantExpr::getGetElementPtr(ConstStr, Zeros, 2); |
| 294 | } |
| 295 | llvm::Constant *CGObjCGNU::MakeGlobal(const llvm::StructType *Ty, |
| 296 | std::vector<llvm::Constant*> &V, const std::string &Name) { |
| 297 | llvm::Constant *C = llvm::ConstantStruct::get(Ty, V); |
| 298 | return new llvm::GlobalVariable(Ty, false, |
| 299 | llvm::GlobalValue::InternalLinkage, C, Name, &TheModule); |
| 300 | } |
| 301 | llvm::Constant *CGObjCGNU::MakeGlobal(const llvm::ArrayType *Ty, |
| 302 | std::vector<llvm::Constant*> &V, const std::string &Name) { |
| 303 | llvm::Constant *C = llvm::ConstantArray::get(Ty, V); |
| 304 | return new llvm::GlobalVariable(Ty, false, |
| 305 | llvm::GlobalValue::InternalLinkage, C, Name, &TheModule); |
| 306 | } |
| 307 | |
| 308 | /// Generate an NSConstantString object. |
| 309 | //TODO: In case there are any crazy people still using the GNU runtime without |
| 310 | //an OpenStep implementation, this should let them select their own class for |
| 311 | //constant strings. |
Steve Naroff | 33fdb73 | 2009-03-31 16:53:37 +0000 | [diff] [blame] | 312 | llvm::Constant *CGObjCGNU::GenerateConstantString(const ObjCStringLiteral *SL) { |
| 313 | std::string Str(SL->getString()->getStrData(), |
| 314 | SL->getString()->getByteLength()); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 315 | std::vector<llvm::Constant*> Ivars; |
| 316 | Ivars.push_back(NULLPtr); |
Chris Lattner | 13fd7e5 | 2008-06-21 21:44:18 +0000 | [diff] [blame] | 317 | Ivars.push_back(MakeConstantString(Str)); |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 318 | Ivars.push_back(llvm::ConstantInt::get(IntTy, Str.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 319 | llvm::Constant *ObjCStr = MakeGlobal( |
| 320 | llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, IntTy, NULL), |
| 321 | Ivars, ".objc_str"); |
| 322 | ConstantStrings.push_back( |
| 323 | llvm::ConstantExpr::getBitCast(ObjCStr, PtrToInt8Ty)); |
| 324 | return ObjCStr; |
| 325 | } |
| 326 | |
| 327 | ///Generates a message send where the super is the receiver. This is a message |
| 328 | ///send to self with special delivery semantics indicating which class's method |
| 329 | ///should be called. |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 330 | CodeGen::RValue |
| 331 | CGObjCGNU::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 7f8ea5c | 2008-08-30 05:35:15 +0000 | [diff] [blame] | 332 | QualType ResultType, |
| 333 | Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 334 | const ObjCInterfaceDecl *Class, |
Fariborz Jahanian | 7ce7792 | 2009-02-28 20:07:56 +0000 | [diff] [blame] | 335 | bool isCategoryImpl, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 336 | llvm::Value *Receiver, |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 337 | bool IsClassMessage, |
| 338 | const CallArgList &CallArgs) { |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 339 | llvm::Value *cmd = GetSelector(CGF.Builder, Sel); |
| 340 | |
| 341 | CallArgList ActualArgs; |
| 342 | |
| 343 | ActualArgs.push_back( |
| 344 | std::make_pair(RValue::get(CGF.Builder.CreateBitCast(Receiver, IdTy)), |
| 345 | CGF.getContext().getObjCIdType())); |
| 346 | ActualArgs.push_back(std::make_pair(RValue::get(cmd), |
| 347 | CGF.getContext().getObjCSelType())); |
| 348 | ActualArgs.insert(ActualArgs.end(), CallArgs.begin(), CallArgs.end()); |
| 349 | |
| 350 | CodeGenTypes &Types = CGM.getTypes(); |
| 351 | const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs); |
| 352 | const llvm::FunctionType *impType = Types.GetFunctionType(FnInfo, false); |
| 353 | |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 354 | llvm::Value *ReceiverClass = 0; |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 355 | if (isCategoryImpl) { |
| 356 | llvm::Constant *classLookupFunction = 0; |
| 357 | std::vector<const llvm::Type*> Params; |
| 358 | Params.push_back(PtrTy); |
| 359 | if (IsClassMessage) { |
| 360 | classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
| 361 | IdTy, Params, true), "objc_get_meta_class"); |
| 362 | } else { |
| 363 | classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
| 364 | IdTy, Params, true), "objc_get_class"); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 365 | } |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 366 | ReceiverClass = CGF.Builder.CreateCall(classLookupFunction, |
| 367 | MakeConstantString(Class->getNameAsString())); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 368 | } else { |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 369 | // Set up global aliases for the metaclass or class pointer if they do not |
| 370 | // already exist. These will are forward-references which will be set to |
| 371 | // pointers to the class and metaclass structure created for the runtime load |
| 372 | // function. To send a message to super, we look up the value of the |
| 373 | // super_class pointer from either the class or metaclass structure. |
| 374 | if (IsClassMessage) { |
| 375 | if (!MetaClassPtrAlias) { |
| 376 | MetaClassPtrAlias = new llvm::GlobalAlias(IdTy, |
| 377 | llvm::GlobalValue::InternalLinkage, ".objc_metaclass_ref" + |
| 378 | Class->getNameAsString(), NULL, &TheModule); |
| 379 | } |
| 380 | ReceiverClass = MetaClassPtrAlias; |
| 381 | } else { |
| 382 | if (!ClassPtrAlias) { |
| 383 | ClassPtrAlias = new llvm::GlobalAlias(IdTy, |
| 384 | llvm::GlobalValue::InternalLinkage, ".objc_class_ref" + |
| 385 | Class->getNameAsString(), NULL, &TheModule); |
| 386 | } |
| 387 | ReceiverClass = ClassPtrAlias; |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 388 | } |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 389 | } |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 390 | // Cast the pointer to a simplified version of the class structure |
| 391 | ReceiverClass = CGF.Builder.CreateBitCast(ReceiverClass, |
| 392 | llvm::PointerType::getUnqual(llvm::StructType::get(IdTy, IdTy, NULL))); |
| 393 | // Get the superclass pointer |
| 394 | ReceiverClass = CGF.Builder.CreateStructGEP(ReceiverClass, 1); |
| 395 | // Load the superclass pointer |
| 396 | ReceiverClass = CGF.Builder.CreateLoad(ReceiverClass); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 397 | // Construct the structure used to look up the IMP |
| 398 | llvm::StructType *ObjCSuperTy = llvm::StructType::get(Receiver->getType(), |
| 399 | IdTy, NULL); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 400 | llvm::Value *ObjCSuper = CGF.Builder.CreateAlloca(ObjCSuperTy); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 401 | |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 402 | CGF.Builder.CreateStore(Receiver, CGF.Builder.CreateStructGEP(ObjCSuper, 0)); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 403 | CGF.Builder.CreateStore(ReceiverClass, |
| 404 | CGF.Builder.CreateStructGEP(ObjCSuper, 1)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 405 | |
| 406 | // Get the IMP |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 407 | std::vector<const llvm::Type*> Params; |
| 408 | Params.push_back(llvm::PointerType::getUnqual(ObjCSuperTy)); |
| 409 | Params.push_back(SelectorTy); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 410 | llvm::Constant *lookupFunction = |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 411 | CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
| 412 | llvm::PointerType::getUnqual(impType), Params, true), |
| 413 | "objc_msg_lookup_super"); |
| 414 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 415 | llvm::Value *lookupArgs[] = {ObjCSuper, cmd}; |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 416 | llvm::Value *imp = CGF.Builder.CreateCall(lookupFunction, lookupArgs, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 417 | lookupArgs+2); |
| 418 | |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 419 | return CGF.EmitCall(FnInfo, imp, ActualArgs); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | /// Generate code for a message send expression. |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 423 | CodeGen::RValue |
| 424 | CGObjCGNU::GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 7f8ea5c | 2008-08-30 05:35:15 +0000 | [diff] [blame] | 425 | QualType ResultType, |
| 426 | Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 427 | llvm::Value *Receiver, |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 428 | bool IsClassMessage, |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 429 | const CallArgList &CallArgs, |
| 430 | const ObjCMethodDecl *Method) { |
| 431 | llvm::Value *cmd; |
| 432 | if (Method) |
| 433 | cmd = GetSelector(CGF.Builder, Method); |
| 434 | else |
| 435 | cmd = GetSelector(CGF.Builder, Sel); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 436 | CallArgList ActualArgs; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 437 | |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 438 | ActualArgs.push_back( |
Fariborz Jahanian | 34e6577 | 2009-05-22 20:17:16 +0000 | [diff] [blame] | 439 | std::make_pair(RValue::get(CGF.Builder.CreateBitCast(Receiver, IdTy)), |
| 440 | CGF.getContext().getObjCIdType())); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 441 | ActualArgs.push_back(std::make_pair(RValue::get(cmd), |
| 442 | CGF.getContext().getObjCSelType())); |
| 443 | ActualArgs.insert(ActualArgs.end(), CallArgs.begin(), CallArgs.end()); |
| 444 | |
| 445 | CodeGenTypes &Types = CGM.getTypes(); |
| 446 | const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs); |
| 447 | const llvm::FunctionType *impType = Types.GetFunctionType(FnInfo, false); |
| 448 | |
Fariborz Jahanian | 34e6577 | 2009-05-22 20:17:16 +0000 | [diff] [blame] | 449 | llvm::Value *imp; |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 450 | std::vector<const llvm::Type*> Params; |
| 451 | Params.push_back(Receiver->getType()); |
| 452 | Params.push_back(SelectorTy); |
Fariborz Jahanian | 34e6577 | 2009-05-22 20:17:16 +0000 | [diff] [blame] | 453 | // For sender-aware dispatch, we pass the sender as the third argument to a |
| 454 | // lookup function. When sending messages from C code, the sender is nil. |
| 455 | // objc_msg_lookup_sender(id receiver, SEL selector, id sender); |
| 456 | if (CGM.getContext().getLangOptions().ObjCSenderDispatch) { |
| 457 | llvm::Value *self; |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 458 | |
Fariborz Jahanian | 34e6577 | 2009-05-22 20:17:16 +0000 | [diff] [blame] | 459 | if (isa<ObjCMethodDecl>(CGF.CurFuncDecl)) { |
| 460 | self = CGF.LoadObjCSelf(); |
| 461 | } else { |
| 462 | self = llvm::ConstantPointerNull::get(IdTy); |
| 463 | } |
| 464 | Params.push_back(self->getType()); |
| 465 | llvm::Constant *lookupFunction = |
| 466 | CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
| 467 | llvm::PointerType::getUnqual(impType), Params, true), |
| 468 | "objc_msg_lookup_sender"); |
| 469 | |
| 470 | imp = CGF.Builder.CreateCall3(lookupFunction, Receiver, cmd, self); |
| 471 | } else { |
| 472 | llvm::Constant *lookupFunction = |
| 473 | CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
| 474 | llvm::PointerType::getUnqual(impType), Params, true), |
| 475 | "objc_msg_lookup"); |
| 476 | |
| 477 | imp = CGF.Builder.CreateCall2(lookupFunction, Receiver, cmd); |
| 478 | } |
Chris Lattner | 3eae03e | 2008-05-06 00:56:42 +0000 | [diff] [blame] | 479 | |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 480 | return CGF.EmitCall(FnInfo, imp, ActualArgs); |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 481 | } |
| 482 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 483 | /// Generates a MethodList. Used in construction of a objc_class and |
| 484 | /// objc_category structures. |
| 485 | llvm::Constant *CGObjCGNU::GenerateMethodList(const std::string &ClassName, |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 486 | const std::string &CategoryName, |
| 487 | const llvm::SmallVectorImpl<Selector> &MethodSels, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 488 | const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes, |
| 489 | bool isClassMethodList) { |
| 490 | // Get the method structure type. |
| 491 | llvm::StructType *ObjCMethodTy = llvm::StructType::get( |
| 492 | PtrToInt8Ty, // Really a selector, but the runtime creates it us. |
| 493 | PtrToInt8Ty, // Method types |
| 494 | llvm::PointerType::getUnqual(IMPTy), //Method pointer |
| 495 | NULL); |
| 496 | std::vector<llvm::Constant*> Methods; |
| 497 | std::vector<llvm::Constant*> Elements; |
| 498 | for (unsigned int i = 0, e = MethodTypes.size(); i < e; ++i) { |
| 499 | Elements.clear(); |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 500 | if (llvm::Constant *Method = |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 501 | TheModule.getFunction(SymbolNameForMethod(ClassName, CategoryName, |
Chris Lattner | 077bf5e | 2008-11-24 03:33:13 +0000 | [diff] [blame] | 502 | MethodSels[i].getAsString(), |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 503 | isClassMethodList))) { |
| 504 | llvm::Constant *C = |
| 505 | CGM.GetAddrOfConstantCString(MethodSels[i].getAsString()); |
| 506 | Elements.push_back(llvm::ConstantExpr::getGetElementPtr(C, Zeros, 2)); |
| 507 | Elements.push_back( |
| 508 | llvm::ConstantExpr::getGetElementPtr(MethodTypes[i], Zeros, 2)); |
| 509 | Method = llvm::ConstantExpr::getBitCast(Method, |
| 510 | llvm::PointerType::getUnqual(IMPTy)); |
| 511 | Elements.push_back(Method); |
| 512 | Methods.push_back(llvm::ConstantStruct::get(ObjCMethodTy, Elements)); |
| 513 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | // Array of method structures |
| 517 | llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodTy, |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 518 | Methods.size()); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 519 | llvm::Constant *MethodArray = llvm::ConstantArray::get(ObjCMethodArrayTy, |
Chris Lattner | fba6763 | 2008-06-26 04:52:29 +0000 | [diff] [blame] | 520 | Methods); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 521 | |
| 522 | // Structure containing list pointer, array and array count |
| 523 | llvm::SmallVector<const llvm::Type*, 16> ObjCMethodListFields; |
| 524 | llvm::PATypeHolder OpaqueNextTy = llvm::OpaqueType::get(); |
| 525 | llvm::Type *NextPtrTy = llvm::PointerType::getUnqual(OpaqueNextTy); |
| 526 | llvm::StructType *ObjCMethodListTy = llvm::StructType::get(NextPtrTy, |
| 527 | IntTy, |
| 528 | ObjCMethodArrayTy, |
| 529 | NULL); |
| 530 | // Refine next pointer type to concrete type |
| 531 | llvm::cast<llvm::OpaqueType>( |
| 532 | OpaqueNextTy.get())->refineAbstractTypeTo(ObjCMethodListTy); |
| 533 | ObjCMethodListTy = llvm::cast<llvm::StructType>(OpaqueNextTy.get()); |
| 534 | |
| 535 | Methods.clear(); |
| 536 | Methods.push_back(llvm::ConstantPointerNull::get( |
| 537 | llvm::PointerType::getUnqual(ObjCMethodListTy))); |
| 538 | Methods.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, |
| 539 | MethodTypes.size())); |
| 540 | Methods.push_back(MethodArray); |
| 541 | |
| 542 | // Create an instance of the structure |
| 543 | return MakeGlobal(ObjCMethodListTy, Methods, ".objc_method_list"); |
| 544 | } |
| 545 | |
| 546 | /// Generates an IvarList. Used in construction of a objc_class. |
| 547 | llvm::Constant *CGObjCGNU::GenerateIvarList( |
| 548 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, |
| 549 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, |
| 550 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets) { |
| 551 | // Get the method structure type. |
| 552 | llvm::StructType *ObjCIvarTy = llvm::StructType::get( |
| 553 | PtrToInt8Ty, |
| 554 | PtrToInt8Ty, |
| 555 | IntTy, |
| 556 | NULL); |
| 557 | std::vector<llvm::Constant*> Ivars; |
| 558 | std::vector<llvm::Constant*> Elements; |
| 559 | for (unsigned int i = 0, e = IvarNames.size() ; i < e ; i++) { |
| 560 | Elements.clear(); |
| 561 | Elements.push_back( llvm::ConstantExpr::getGetElementPtr(IvarNames[i], |
| 562 | Zeros, 2)); |
| 563 | Elements.push_back( llvm::ConstantExpr::getGetElementPtr(IvarTypes[i], |
| 564 | Zeros, 2)); |
| 565 | Elements.push_back(IvarOffsets[i]); |
| 566 | Ivars.push_back(llvm::ConstantStruct::get(ObjCIvarTy, Elements)); |
| 567 | } |
| 568 | |
| 569 | // Array of method structures |
| 570 | llvm::ArrayType *ObjCIvarArrayTy = llvm::ArrayType::get(ObjCIvarTy, |
| 571 | IvarNames.size()); |
| 572 | |
| 573 | |
| 574 | Elements.clear(); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 575 | Elements.push_back(llvm::ConstantInt::get(IntTy, (int)IvarNames.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 576 | Elements.push_back(llvm::ConstantArray::get(ObjCIvarArrayTy, Ivars)); |
| 577 | // Structure containing array and array count |
| 578 | llvm::StructType *ObjCIvarListTy = llvm::StructType::get(IntTy, |
| 579 | ObjCIvarArrayTy, |
| 580 | NULL); |
| 581 | |
| 582 | // Create an instance of the structure |
| 583 | return MakeGlobal(ObjCIvarListTy, Elements, ".objc_ivar_list"); |
| 584 | } |
| 585 | |
| 586 | /// Generate a class structure |
| 587 | llvm::Constant *CGObjCGNU::GenerateClassStructure( |
| 588 | llvm::Constant *MetaClass, |
| 589 | llvm::Constant *SuperClass, |
| 590 | unsigned info, |
Chris Lattner | d002cc6 | 2008-06-26 04:47:04 +0000 | [diff] [blame] | 591 | const char *Name, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 592 | llvm::Constant *Version, |
| 593 | llvm::Constant *InstanceSize, |
| 594 | llvm::Constant *IVars, |
| 595 | llvm::Constant *Methods, |
| 596 | llvm::Constant *Protocols) { |
| 597 | // Set up the class structure |
| 598 | // Note: Several of these are char*s when they should be ids. This is |
| 599 | // because the runtime performs this translation on load. |
| 600 | llvm::StructType *ClassTy = llvm::StructType::get( |
| 601 | PtrToInt8Ty, // class_pointer |
| 602 | PtrToInt8Ty, // super_class |
| 603 | PtrToInt8Ty, // name |
| 604 | LongTy, // version |
| 605 | LongTy, // info |
| 606 | LongTy, // instance_size |
| 607 | IVars->getType(), // ivars |
| 608 | Methods->getType(), // methods |
| 609 | // These are all filled in by the runtime, so we pretend |
| 610 | PtrTy, // dtable |
| 611 | PtrTy, // subclass_list |
| 612 | PtrTy, // sibling_class |
| 613 | PtrTy, // protocols |
| 614 | PtrTy, // gc_object_type |
| 615 | NULL); |
| 616 | llvm::Constant *Zero = llvm::ConstantInt::get(LongTy, 0); |
| 617 | llvm::Constant *NullP = |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 618 | llvm::ConstantPointerNull::get(PtrTy); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 619 | // Fill in the structure |
| 620 | std::vector<llvm::Constant*> Elements; |
| 621 | Elements.push_back(llvm::ConstantExpr::getBitCast(MetaClass, PtrToInt8Ty)); |
| 622 | Elements.push_back(SuperClass); |
Chris Lattner | d002cc6 | 2008-06-26 04:47:04 +0000 | [diff] [blame] | 623 | Elements.push_back(MakeConstantString(Name, ".class_name")); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 624 | Elements.push_back(Zero); |
| 625 | Elements.push_back(llvm::ConstantInt::get(LongTy, info)); |
| 626 | Elements.push_back(InstanceSize); |
| 627 | Elements.push_back(IVars); |
| 628 | Elements.push_back(Methods); |
| 629 | Elements.push_back(NullP); |
| 630 | Elements.push_back(NullP); |
| 631 | Elements.push_back(NullP); |
| 632 | Elements.push_back(llvm::ConstantExpr::getBitCast(Protocols, PtrTy)); |
| 633 | Elements.push_back(NullP); |
| 634 | // Create an instance of the structure |
Chris Lattner | 1565e03 | 2008-07-21 06:31:05 +0000 | [diff] [blame] | 635 | return MakeGlobal(ClassTy, Elements, SymbolNameForClass(Name)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | llvm::Constant *CGObjCGNU::GenerateProtocolMethodList( |
| 639 | const llvm::SmallVectorImpl<llvm::Constant *> &MethodNames, |
| 640 | const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes) { |
| 641 | // Get the method structure type. |
| 642 | llvm::StructType *ObjCMethodDescTy = llvm::StructType::get( |
| 643 | PtrToInt8Ty, // Really a selector, but the runtime does the casting for us. |
| 644 | PtrToInt8Ty, |
| 645 | NULL); |
| 646 | std::vector<llvm::Constant*> Methods; |
| 647 | std::vector<llvm::Constant*> Elements; |
| 648 | for (unsigned int i = 0, e = MethodTypes.size() ; i < e ; i++) { |
| 649 | Elements.clear(); |
| 650 | Elements.push_back( llvm::ConstantExpr::getGetElementPtr(MethodNames[i], |
| 651 | Zeros, 2)); |
| 652 | Elements.push_back( |
| 653 | llvm::ConstantExpr::getGetElementPtr(MethodTypes[i], Zeros, 2)); |
| 654 | Methods.push_back(llvm::ConstantStruct::get(ObjCMethodDescTy, Elements)); |
| 655 | } |
| 656 | llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodDescTy, |
| 657 | MethodNames.size()); |
| 658 | llvm::Constant *Array = llvm::ConstantArray::get(ObjCMethodArrayTy, Methods); |
| 659 | llvm::StructType *ObjCMethodDescListTy = llvm::StructType::get( |
| 660 | IntTy, ObjCMethodArrayTy, NULL); |
| 661 | Methods.clear(); |
| 662 | Methods.push_back(llvm::ConstantInt::get(IntTy, MethodNames.size())); |
| 663 | Methods.push_back(Array); |
| 664 | return MakeGlobal(ObjCMethodDescListTy, Methods, ".objc_method_list"); |
| 665 | } |
| 666 | // Create the protocol list structure used in classes, categories and so on |
| 667 | llvm::Constant *CGObjCGNU::GenerateProtocolList( |
| 668 | const llvm::SmallVectorImpl<std::string> &Protocols) { |
| 669 | llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrToInt8Ty, |
| 670 | Protocols.size()); |
| 671 | llvm::StructType *ProtocolListTy = llvm::StructType::get( |
| 672 | PtrTy, //Should be a recurisve pointer, but it's always NULL here. |
| 673 | LongTy,//FIXME: Should be size_t |
| 674 | ProtocolArrayTy, |
| 675 | NULL); |
| 676 | std::vector<llvm::Constant*> Elements; |
| 677 | for (const std::string *iter = Protocols.begin(), *endIter = Protocols.end(); |
| 678 | iter != endIter ; iter++) { |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 679 | llvm::Constant *protocol = ExistingProtocols[*iter]; |
| 680 | if (!protocol) |
| 681 | protocol = GenerateEmptyProtocol(*iter); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 682 | llvm::Constant *Ptr = |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 683 | llvm::ConstantExpr::getBitCast(protocol, PtrToInt8Ty); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 684 | Elements.push_back(Ptr); |
| 685 | } |
| 686 | llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, |
| 687 | Elements); |
| 688 | Elements.clear(); |
| 689 | Elements.push_back(NULLPtr); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 690 | Elements.push_back(llvm::ConstantInt::get(LongTy, Protocols.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 691 | Elements.push_back(ProtocolArray); |
| 692 | return MakeGlobal(ProtocolListTy, Elements, ".objc_protocol_list"); |
| 693 | } |
| 694 | |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 695 | llvm::Value *CGObjCGNU::GenerateProtocolRef(CGBuilderTy &Builder, |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 696 | const ObjCProtocolDecl *PD) { |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 697 | llvm::Value *protocol = ExistingProtocols[PD->getNameAsString()]; |
| 698 | const llvm::Type *T = |
| 699 | CGM.getTypes().ConvertType(CGM.getContext().getObjCProtoType()); |
| 700 | return Builder.CreateBitCast(protocol, llvm::PointerType::getUnqual(T)); |
| 701 | } |
| 702 | |
| 703 | llvm::Constant *CGObjCGNU::GenerateEmptyProtocol( |
| 704 | const std::string &ProtocolName) { |
| 705 | llvm::SmallVector<std::string, 0> EmptyStringVector; |
| 706 | llvm::SmallVector<llvm::Constant*, 0> EmptyConstantVector; |
| 707 | |
| 708 | llvm::Constant *ProtocolList = GenerateProtocolList(EmptyStringVector); |
| 709 | llvm::Constant *InstanceMethodList = |
| 710 | GenerateProtocolMethodList(EmptyConstantVector, EmptyConstantVector); |
| 711 | llvm::Constant *ClassMethodList = |
| 712 | GenerateProtocolMethodList(EmptyConstantVector, EmptyConstantVector); |
| 713 | // Protocols are objects containing lists of the methods implemented and |
| 714 | // protocols adopted. |
| 715 | llvm::StructType *ProtocolTy = llvm::StructType::get(IdTy, |
| 716 | PtrToInt8Ty, |
| 717 | ProtocolList->getType(), |
| 718 | InstanceMethodList->getType(), |
| 719 | ClassMethodList->getType(), |
| 720 | NULL); |
| 721 | std::vector<llvm::Constant*> Elements; |
| 722 | // The isa pointer must be set to a magic number so the runtime knows it's |
| 723 | // the correct layout. |
| 724 | Elements.push_back(llvm::ConstantExpr::getIntToPtr( |
| 725 | llvm::ConstantInt::get(llvm::Type::Int32Ty, ProtocolVersion), IdTy)); |
| 726 | Elements.push_back(MakeConstantString(ProtocolName, ".objc_protocol_name")); |
| 727 | Elements.push_back(ProtocolList); |
| 728 | Elements.push_back(InstanceMethodList); |
| 729 | Elements.push_back(ClassMethodList); |
| 730 | return MakeGlobal(ProtocolTy, Elements, ".objc_protocol"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 731 | } |
| 732 | |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 733 | void CGObjCGNU::GenerateProtocol(const ObjCProtocolDecl *PD) { |
| 734 | ASTContext &Context = CGM.getContext(); |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 735 | std::string ProtocolName = PD->getNameAsString(); |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 736 | llvm::SmallVector<std::string, 16> Protocols; |
| 737 | for (ObjCProtocolDecl::protocol_iterator PI = PD->protocol_begin(), |
| 738 | E = PD->protocol_end(); PI != E; ++PI) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 739 | Protocols.push_back((*PI)->getNameAsString()); |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 740 | llvm::SmallVector<llvm::Constant*, 16> InstanceMethodNames; |
| 741 | llvm::SmallVector<llvm::Constant*, 16> InstanceMethodTypes; |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 742 | for (ObjCProtocolDecl::instmeth_iterator iter = PD->instmeth_begin(), |
| 743 | E = PD->instmeth_end(); iter != E; iter++) { |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 744 | std::string TypeStr; |
| 745 | Context.getObjCEncodingForMethodDecl(*iter, TypeStr); |
| 746 | InstanceMethodNames.push_back( |
Chris Lattner | 077bf5e | 2008-11-24 03:33:13 +0000 | [diff] [blame] | 747 | CGM.GetAddrOfConstantCString((*iter)->getSelector().getAsString())); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 748 | InstanceMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 749 | } |
| 750 | // Collect information about class methods: |
| 751 | llvm::SmallVector<llvm::Constant*, 16> ClassMethodNames; |
| 752 | llvm::SmallVector<llvm::Constant*, 16> ClassMethodTypes; |
Douglas Gregor | 6ab3524 | 2009-04-09 21:40:53 +0000 | [diff] [blame] | 753 | for (ObjCProtocolDecl::classmeth_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 754 | iter = PD->classmeth_begin(), endIter = PD->classmeth_end(); |
| 755 | iter != endIter ; iter++) { |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 756 | std::string TypeStr; |
| 757 | Context.getObjCEncodingForMethodDecl((*iter),TypeStr); |
| 758 | ClassMethodNames.push_back( |
Chris Lattner | 077bf5e | 2008-11-24 03:33:13 +0000 | [diff] [blame] | 759 | CGM.GetAddrOfConstantCString((*iter)->getSelector().getAsString())); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 760 | ClassMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 761 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 762 | |
| 763 | llvm::Constant *ProtocolList = GenerateProtocolList(Protocols); |
| 764 | llvm::Constant *InstanceMethodList = |
| 765 | GenerateProtocolMethodList(InstanceMethodNames, InstanceMethodTypes); |
| 766 | llvm::Constant *ClassMethodList = |
| 767 | GenerateProtocolMethodList(ClassMethodNames, ClassMethodTypes); |
| 768 | // Protocols are objects containing lists of the methods implemented and |
| 769 | // protocols adopted. |
| 770 | llvm::StructType *ProtocolTy = llvm::StructType::get(IdTy, |
| 771 | PtrToInt8Ty, |
| 772 | ProtocolList->getType(), |
| 773 | InstanceMethodList->getType(), |
| 774 | ClassMethodList->getType(), |
| 775 | NULL); |
| 776 | std::vector<llvm::Constant*> Elements; |
| 777 | // The isa pointer must be set to a magic number so the runtime knows it's |
| 778 | // the correct layout. |
| 779 | Elements.push_back(llvm::ConstantExpr::getIntToPtr( |
| 780 | llvm::ConstantInt::get(llvm::Type::Int32Ty, ProtocolVersion), IdTy)); |
| 781 | Elements.push_back(MakeConstantString(ProtocolName, ".objc_protocol_name")); |
| 782 | Elements.push_back(ProtocolList); |
| 783 | Elements.push_back(InstanceMethodList); |
| 784 | Elements.push_back(ClassMethodList); |
| 785 | ExistingProtocols[ProtocolName] = |
| 786 | llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolTy, Elements, |
| 787 | ".objc_protocol"), IdTy); |
| 788 | } |
| 789 | |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 790 | void CGObjCGNU::GenerateCategory(const ObjCCategoryImplDecl *OCD) { |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 791 | std::string ClassName = OCD->getClassInterface()->getNameAsString(); |
| 792 | std::string CategoryName = OCD->getNameAsString(); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 793 | // Collect information about instance methods |
| 794 | llvm::SmallVector<Selector, 16> InstanceMethodSels; |
| 795 | llvm::SmallVector<llvm::Constant*, 16> InstanceMethodTypes; |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 796 | for (ObjCCategoryImplDecl::instmeth_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 797 | iter = OCD->instmeth_begin(), endIter = OCD->instmeth_end(); |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 798 | iter != endIter ; iter++) { |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 799 | InstanceMethodSels.push_back((*iter)->getSelector()); |
| 800 | std::string TypeStr; |
| 801 | CGM.getContext().getObjCEncodingForMethodDecl(*iter,TypeStr); |
| 802 | InstanceMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 803 | } |
| 804 | |
| 805 | // Collect information about class methods |
| 806 | llvm::SmallVector<Selector, 16> ClassMethodSels; |
| 807 | llvm::SmallVector<llvm::Constant*, 16> ClassMethodTypes; |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 808 | for (ObjCCategoryImplDecl::classmeth_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 809 | iter = OCD->classmeth_begin(), endIter = OCD->classmeth_end(); |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 810 | iter != endIter ; iter++) { |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 811 | ClassMethodSels.push_back((*iter)->getSelector()); |
| 812 | std::string TypeStr; |
| 813 | CGM.getContext().getObjCEncodingForMethodDecl(*iter,TypeStr); |
| 814 | ClassMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 815 | } |
| 816 | |
| 817 | // Collect the names of referenced protocols |
| 818 | llvm::SmallVector<std::string, 16> Protocols; |
| 819 | const ObjCInterfaceDecl *ClassDecl = OCD->getClassInterface(); |
| 820 | const ObjCList<ObjCProtocolDecl> &Protos =ClassDecl->getReferencedProtocols(); |
| 821 | for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), |
| 822 | E = Protos.end(); I != E; ++I) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 823 | Protocols.push_back((*I)->getNameAsString()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 824 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 825 | std::vector<llvm::Constant*> Elements; |
| 826 | Elements.push_back(MakeConstantString(CategoryName)); |
| 827 | Elements.push_back(MakeConstantString(ClassName)); |
| 828 | // Instance method list |
| 829 | Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 830 | ClassName, CategoryName, InstanceMethodSels, InstanceMethodTypes, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 831 | false), PtrTy)); |
| 832 | // Class method list |
| 833 | Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 834 | ClassName, CategoryName, ClassMethodSels, ClassMethodTypes, true), |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 835 | PtrTy)); |
| 836 | // Protocol list |
| 837 | Elements.push_back(llvm::ConstantExpr::getBitCast( |
| 838 | GenerateProtocolList(Protocols), PtrTy)); |
| 839 | Categories.push_back(llvm::ConstantExpr::getBitCast( |
| 840 | MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, PtrTy, |
| 841 | PtrTy, PtrTy, NULL), Elements), PtrTy)); |
| 842 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 843 | |
| 844 | void CGObjCGNU::GenerateClass(const ObjCImplementationDecl *OID) { |
| 845 | ASTContext &Context = CGM.getContext(); |
| 846 | |
| 847 | // Get the superclass name. |
| 848 | const ObjCInterfaceDecl * SuperClassDecl = |
| 849 | OID->getClassInterface()->getSuperClass(); |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 850 | std::string SuperClassName; |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 851 | if (SuperClassDecl) { |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 852 | SuperClassName = SuperClassDecl->getNameAsString(); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 853 | EmitClassRef(SuperClassName); |
| 854 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 855 | |
| 856 | // Get the class name |
Chris Lattner | 09dc666 | 2009-04-01 02:00:48 +0000 | [diff] [blame] | 857 | ObjCInterfaceDecl *ClassDecl = |
| 858 | const_cast<ObjCInterfaceDecl *>(OID->getClassInterface()); |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 859 | std::string ClassName = ClassDecl->getNameAsString(); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 860 | // Emit the symbol that is used to generate linker errors if this class is |
| 861 | // referenced in other modules but not declared. |
| 862 | new llvm::GlobalVariable(LongTy, false, llvm::GlobalValue::ExternalLinkage, |
| 863 | llvm::ConstantInt::get(LongTy, 0), "__objc_class_name_" + ClassName, |
| 864 | &TheModule); |
| 865 | |
Daniel Dunbar | 2bebbf0 | 2009-05-03 10:46:44 +0000 | [diff] [blame] | 866 | // Get the size of instances. |
| 867 | int instanceSize = Context.getASTObjCImplementationLayout(OID).getSize() / 8; |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 868 | |
| 869 | // Collect information about instance variables. |
| 870 | llvm::SmallVector<llvm::Constant*, 16> IvarNames; |
| 871 | llvm::SmallVector<llvm::Constant*, 16> IvarTypes; |
| 872 | llvm::SmallVector<llvm::Constant*, 16> IvarOffsets; |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 873 | |
| 874 | int superInstanceSize = !SuperClassDecl ? 0 : |
| 875 | Context.getASTObjCInterfaceLayout(SuperClassDecl).getSize() / 8; |
| 876 | // For non-fragile ivars, set the instance size to 0 - {the size of just this |
| 877 | // class}. The runtime will then set this to the correct value on load. |
| 878 | if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { |
| 879 | instanceSize = 0 - (instanceSize - superInstanceSize); |
| 880 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 881 | for (ObjCInterfaceDecl::ivar_iterator iter = ClassDecl->ivar_begin(), |
| 882 | endIter = ClassDecl->ivar_end() ; iter != endIter ; iter++) { |
| 883 | // Store the name |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 884 | IvarNames.push_back(CGM.GetAddrOfConstantCString((*iter) |
| 885 | ->getNameAsString())); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 886 | // Get the type encoding for this ivar |
| 887 | std::string TypeStr; |
Daniel Dunbar | 0d504c1 | 2008-10-17 20:21:44 +0000 | [diff] [blame] | 888 | Context.getObjCEncodingForType((*iter)->getType(), TypeStr); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 889 | IvarTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 890 | // Get the offset |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 891 | uint64_t Offset; |
| 892 | if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { |
| 893 | Offset = ComputeIvarBaseOffset(CGM, ClassDecl, *iter) - |
| 894 | superInstanceSize; |
| 895 | ObjCIvarOffsetVariable(ClassDecl, *iter); |
| 896 | } else { |
| 897 | Offset = ComputeIvarBaseOffset(CGM, ClassDecl, *iter); |
| 898 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 899 | IvarOffsets.push_back( |
Daniel Dunbar | c8cbf19 | 2009-04-22 08:20:31 +0000 | [diff] [blame] | 900 | llvm::ConstantInt::get(llvm::Type::Int32Ty, Offset)); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 901 | } |
| 902 | |
| 903 | // Collect information about instance methods |
| 904 | llvm::SmallVector<Selector, 16> InstanceMethodSels; |
| 905 | llvm::SmallVector<llvm::Constant*, 16> InstanceMethodTypes; |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 906 | for (ObjCImplementationDecl::instmeth_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 907 | iter = OID->instmeth_begin(), endIter = OID->instmeth_end(); |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 908 | iter != endIter ; iter++) { |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 909 | InstanceMethodSels.push_back((*iter)->getSelector()); |
| 910 | std::string TypeStr; |
| 911 | Context.getObjCEncodingForMethodDecl((*iter),TypeStr); |
| 912 | InstanceMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 913 | } |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 914 | for (ObjCImplDecl::propimpl_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 915 | iter = OID->propimpl_begin(), endIter = OID->propimpl_end(); |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 916 | iter != endIter ; iter++) { |
| 917 | ObjCPropertyDecl *property = (*iter)->getPropertyDecl(); |
| 918 | if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { |
| 919 | InstanceMethodSels.push_back(getter->getSelector()); |
| 920 | std::string TypeStr; |
| 921 | Context.getObjCEncodingForMethodDecl(getter,TypeStr); |
| 922 | InstanceMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 923 | } |
| 924 | if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { |
| 925 | InstanceMethodSels.push_back(setter->getSelector()); |
| 926 | std::string TypeStr; |
| 927 | Context.getObjCEncodingForMethodDecl(setter,TypeStr); |
| 928 | InstanceMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 929 | } |
| 930 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 931 | |
| 932 | // Collect information about class methods |
| 933 | llvm::SmallVector<Selector, 16> ClassMethodSels; |
| 934 | llvm::SmallVector<llvm::Constant*, 16> ClassMethodTypes; |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 935 | for (ObjCImplementationDecl::classmeth_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 936 | iter = OID->classmeth_begin(), endIter = OID->classmeth_end(); |
Douglas Gregor | 653f1b1 | 2009-04-23 01:02:12 +0000 | [diff] [blame] | 937 | iter != endIter ; iter++) { |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 938 | ClassMethodSels.push_back((*iter)->getSelector()); |
| 939 | std::string TypeStr; |
| 940 | Context.getObjCEncodingForMethodDecl((*iter),TypeStr); |
| 941 | ClassMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr)); |
| 942 | } |
| 943 | // Collect the names of referenced protocols |
| 944 | llvm::SmallVector<std::string, 16> Protocols; |
| 945 | const ObjCList<ObjCProtocolDecl> &Protos =ClassDecl->getReferencedProtocols(); |
| 946 | for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), |
| 947 | E = Protos.end(); I != E; ++I) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 948 | Protocols.push_back((*I)->getNameAsString()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 949 | |
| 950 | |
| 951 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 952 | // Get the superclass pointer. |
| 953 | llvm::Constant *SuperClass; |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 954 | if (!SuperClassName.empty()) { |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 955 | SuperClass = MakeConstantString(SuperClassName, ".super_class_name"); |
| 956 | } else { |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 957 | SuperClass = llvm::ConstantPointerNull::get(PtrToInt8Ty); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 958 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 959 | // Empty vector used to construct empty method lists |
| 960 | llvm::SmallVector<llvm::Constant*, 1> empty; |
| 961 | // Generate the method and instance variable lists |
| 962 | llvm::Constant *MethodList = GenerateMethodList(ClassName, "", |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 963 | InstanceMethodSels, InstanceMethodTypes, false); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 964 | llvm::Constant *ClassMethodList = GenerateMethodList(ClassName, "", |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 965 | ClassMethodSels, ClassMethodTypes, true); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 966 | llvm::Constant *IvarList = GenerateIvarList(IvarNames, IvarTypes, |
| 967 | IvarOffsets); |
| 968 | //Generate metaclass for class methods |
| 969 | llvm::Constant *MetaClassStruct = GenerateClassStructure(NULLPtr, |
Chris Lattner | 1565e03 | 2008-07-21 06:31:05 +0000 | [diff] [blame] | 970 | NULLPtr, 0x2L, /*name*/"", 0, Zeros[0], GenerateIvarList( |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 971 | empty, empty, empty), ClassMethodList, NULLPtr); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 972 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 973 | // Generate the class structure |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 974 | llvm::Constant *ClassStruct = |
| 975 | GenerateClassStructure(MetaClassStruct, SuperClass, 0x1L, |
| 976 | ClassName.c_str(), 0, |
Sebastian Redl | 3a5013c | 2008-12-04 00:10:55 +0000 | [diff] [blame] | 977 | llvm::ConstantInt::get(LongTy, instanceSize), IvarList, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 978 | MethodList, GenerateProtocolList(Protocols)); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 979 | |
| 980 | // Resolve the class aliases, if they exist. |
| 981 | if (ClassPtrAlias) { |
| 982 | ClassPtrAlias->setAliasee( |
| 983 | llvm::ConstantExpr::getBitCast(ClassStruct, IdTy)); |
| 984 | ClassPtrAlias = 0; |
| 985 | } |
| 986 | if (MetaClassPtrAlias) { |
| 987 | MetaClassPtrAlias->setAliasee( |
| 988 | llvm::ConstantExpr::getBitCast(MetaClassStruct, IdTy)); |
| 989 | MetaClassPtrAlias = 0; |
| 990 | } |
| 991 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 992 | // Add class structure to list to be added to the symtab later |
| 993 | ClassStruct = llvm::ConstantExpr::getBitCast(ClassStruct, PtrToInt8Ty); |
| 994 | Classes.push_back(ClassStruct); |
| 995 | } |
| 996 | |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 997 | void CGObjCGNU::MergeMetadataGlobals( |
| 998 | std::vector<llvm::Constant*> &UsedArray) { |
| 999 | } |
| 1000 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1001 | llvm::Function *CGObjCGNU::ModuleInitFunction() { |
| 1002 | // Only emit an ObjC load function if no Objective-C stuff has been called |
| 1003 | if (Classes.empty() && Categories.empty() && ConstantStrings.empty() && |
| 1004 | ExistingProtocols.empty() && TypedSelectors.empty() && |
Anton Korobeynikov | 5f58b91 | 2008-06-01 15:14:46 +0000 | [diff] [blame] | 1005 | UntypedSelectors.empty()) |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1006 | return NULL; |
Eli Friedman | 1b8956e | 2008-06-01 16:00:02 +0000 | [diff] [blame] | 1007 | |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1008 | const llvm::StructType *SelStructTy = dyn_cast<llvm::StructType>( |
| 1009 | SelectorTy->getElementType()); |
| 1010 | const llvm::Type *SelStructPtrTy = SelectorTy; |
| 1011 | bool isSelOpaque = false; |
| 1012 | if (SelStructTy == 0) { |
| 1013 | SelStructTy = llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, NULL); |
| 1014 | SelStructPtrTy = llvm::PointerType::getUnqual(SelStructTy); |
| 1015 | isSelOpaque = true; |
| 1016 | } |
| 1017 | |
Eli Friedman | 1b8956e | 2008-06-01 16:00:02 +0000 | [diff] [blame] | 1018 | // Name the ObjC types to make the IR a bit easier to read |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1019 | TheModule.addTypeName(".objc_selector", SelStructPtrTy); |
Eli Friedman | 1b8956e | 2008-06-01 16:00:02 +0000 | [diff] [blame] | 1020 | TheModule.addTypeName(".objc_id", IdTy); |
| 1021 | TheModule.addTypeName(".objc_imp", IMPTy); |
| 1022 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1023 | std::vector<llvm::Constant*> Elements; |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 1024 | llvm::Constant *Statics = NULLPtr; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1025 | // Generate statics list: |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 1026 | if (ConstantStrings.size()) { |
| 1027 | llvm::ArrayType *StaticsArrayTy = llvm::ArrayType::get(PtrToInt8Ty, |
| 1028 | ConstantStrings.size() + 1); |
| 1029 | ConstantStrings.push_back(NULLPtr); |
| 1030 | Elements.push_back(MakeConstantString("NSConstantString", |
| 1031 | ".objc_static_class_name")); |
| 1032 | Elements.push_back(llvm::ConstantArray::get(StaticsArrayTy, |
| 1033 | ConstantStrings)); |
| 1034 | llvm::StructType *StaticsListTy = |
| 1035 | llvm::StructType::get(PtrToInt8Ty, StaticsArrayTy, NULL); |
| 1036 | llvm::Type *StaticsListPtrTy = llvm::PointerType::getUnqual(StaticsListTy); |
| 1037 | Statics = MakeGlobal(StaticsListTy, Elements, ".objc_statics"); |
| 1038 | llvm::ArrayType *StaticsListArrayTy = |
| 1039 | llvm::ArrayType::get(StaticsListPtrTy, 2); |
| 1040 | Elements.clear(); |
| 1041 | Elements.push_back(Statics); |
| 1042 | Elements.push_back(llvm::Constant::getNullValue(StaticsListPtrTy)); |
| 1043 | Statics = MakeGlobal(StaticsListArrayTy, Elements, ".objc_statics_ptr"); |
| 1044 | Statics = llvm::ConstantExpr::getBitCast(Statics, PtrTy); |
| 1045 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1046 | // Array of classes, categories, and constant objects |
| 1047 | llvm::ArrayType *ClassListTy = llvm::ArrayType::get(PtrToInt8Ty, |
| 1048 | Classes.size() + Categories.size() + 2); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1049 | llvm::StructType *SymTabTy = llvm::StructType::get(LongTy, SelStructPtrTy, |
Chris Lattner | 630404b | 2008-06-26 04:10:42 +0000 | [diff] [blame] | 1050 | llvm::Type::Int16Ty, |
| 1051 | llvm::Type::Int16Ty, |
| 1052 | ClassListTy, NULL); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1053 | |
| 1054 | Elements.clear(); |
| 1055 | // Pointer to an array of selectors used in this module. |
| 1056 | std::vector<llvm::Constant*> Selectors; |
| 1057 | for (std::map<TypedSelector, llvm::GlobalAlias*>::iterator |
| 1058 | iter = TypedSelectors.begin(), iterEnd = TypedSelectors.end(); |
| 1059 | iter != iterEnd ; ++iter) { |
Chris Lattner | 630404b | 2008-06-26 04:10:42 +0000 | [diff] [blame] | 1060 | Elements.push_back(MakeConstantString(iter->first.first, ".objc_sel_name")); |
| 1061 | Elements.push_back(MakeConstantString(iter->first.second, |
| 1062 | ".objc_sel_types")); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1063 | Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); |
| 1064 | Elements.clear(); |
| 1065 | } |
| 1066 | for (llvm::StringMap<llvm::GlobalAlias*>::iterator |
| 1067 | iter = UntypedSelectors.begin(), iterEnd = UntypedSelectors.end(); |
Chris Lattner | 630404b | 2008-06-26 04:10:42 +0000 | [diff] [blame] | 1068 | iter != iterEnd; ++iter) { |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1069 | Elements.push_back( |
Chris Lattner | 630404b | 2008-06-26 04:10:42 +0000 | [diff] [blame] | 1070 | MakeConstantString(iter->getKeyData(), ".objc_sel_name")); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1071 | Elements.push_back(NULLPtr); |
| 1072 | Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); |
| 1073 | Elements.clear(); |
| 1074 | } |
| 1075 | Elements.push_back(NULLPtr); |
| 1076 | Elements.push_back(NULLPtr); |
| 1077 | Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); |
| 1078 | Elements.clear(); |
| 1079 | // Number of static selectors |
| 1080 | Elements.push_back(llvm::ConstantInt::get(LongTy, Selectors.size() )); |
| 1081 | llvm::Constant *SelectorList = MakeGlobal( |
| 1082 | llvm::ArrayType::get(SelStructTy, Selectors.size()), Selectors, |
| 1083 | ".objc_selector_list"); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1084 | Elements.push_back(llvm::ConstantExpr::getBitCast(SelectorList, |
| 1085 | SelStructPtrTy)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1086 | |
| 1087 | // Now that all of the static selectors exist, create pointers to them. |
| 1088 | int index = 0; |
| 1089 | for (std::map<TypedSelector, llvm::GlobalAlias*>::iterator |
| 1090 | iter=TypedSelectors.begin(), iterEnd =TypedSelectors.end(); |
| 1091 | iter != iterEnd; ++iter) { |
| 1092 | llvm::Constant *Idxs[] = {Zeros[0], |
| 1093 | llvm::ConstantInt::get(llvm::Type::Int32Ty, index++), Zeros[0]}; |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1094 | llvm::Constant *SelPtr = new llvm::GlobalVariable(SelStructPtrTy, |
| 1095 | true, llvm::GlobalValue::InternalLinkage, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1096 | llvm::ConstantExpr::getGetElementPtr(SelectorList, Idxs, 2), |
| 1097 | ".objc_sel_ptr", &TheModule); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1098 | // If selectors are defined as an opaque type, cast the pointer to this |
| 1099 | // type. |
| 1100 | if (isSelOpaque) { |
| 1101 | SelPtr = llvm::ConstantExpr::getBitCast(SelPtr, |
| 1102 | llvm::PointerType::getUnqual(SelectorTy)); |
| 1103 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1104 | (*iter).second->setAliasee(SelPtr); |
| 1105 | } |
| 1106 | for (llvm::StringMap<llvm::GlobalAlias*>::iterator |
| 1107 | iter=UntypedSelectors.begin(), iterEnd = UntypedSelectors.end(); |
| 1108 | iter != iterEnd; iter++) { |
| 1109 | llvm::Constant *Idxs[] = {Zeros[0], |
| 1110 | llvm::ConstantInt::get(llvm::Type::Int32Ty, index++), Zeros[0]}; |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1111 | llvm::Constant *SelPtr = new llvm::GlobalVariable(SelStructPtrTy, true, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1112 | llvm::GlobalValue::InternalLinkage, |
| 1113 | llvm::ConstantExpr::getGetElementPtr(SelectorList, Idxs, 2), |
| 1114 | ".objc_sel_ptr", &TheModule); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 1115 | // If selectors are defined as an opaque type, cast the pointer to this |
| 1116 | // type. |
| 1117 | if (isSelOpaque) { |
| 1118 | SelPtr = llvm::ConstantExpr::getBitCast(SelPtr, |
| 1119 | llvm::PointerType::getUnqual(SelectorTy)); |
| 1120 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1121 | (*iter).second->setAliasee(SelPtr); |
| 1122 | } |
| 1123 | // Number of classes defined. |
| 1124 | Elements.push_back(llvm::ConstantInt::get(llvm::Type::Int16Ty, |
| 1125 | Classes.size())); |
| 1126 | // Number of categories defined |
| 1127 | Elements.push_back(llvm::ConstantInt::get(llvm::Type::Int16Ty, |
| 1128 | Categories.size())); |
| 1129 | // Create an array of classes, then categories, then static object instances |
| 1130 | Classes.insert(Classes.end(), Categories.begin(), Categories.end()); |
| 1131 | // NULL-terminated list of static object instances (mainly constant strings) |
| 1132 | Classes.push_back(Statics); |
| 1133 | Classes.push_back(NULLPtr); |
| 1134 | llvm::Constant *ClassList = llvm::ConstantArray::get(ClassListTy, Classes); |
| 1135 | Elements.push_back(ClassList); |
| 1136 | // Construct the symbol table |
| 1137 | llvm::Constant *SymTab= MakeGlobal(SymTabTy, Elements); |
| 1138 | |
| 1139 | // The symbol table is contained in a module which has some version-checking |
| 1140 | // constants |
| 1141 | llvm::StructType * ModuleTy = llvm::StructType::get(LongTy, LongTy, |
| 1142 | PtrToInt8Ty, llvm::PointerType::getUnqual(SymTabTy), NULL); |
| 1143 | Elements.clear(); |
| 1144 | // Runtime version used for compatibility checking. |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1145 | if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { |
| 1146 | Elements.push_back(llvm::ConstantInt::get(LongTy, |
| 1147 | NonFragileRuntimeVersion)); |
| 1148 | } else { |
| 1149 | Elements.push_back(llvm::ConstantInt::get(LongTy, RuntimeVersion)); |
| 1150 | } |
Fariborz Jahanian | 91a0b51 | 2009-04-01 19:49:42 +0000 | [diff] [blame] | 1151 | // sizeof(ModuleTy) |
| 1152 | llvm::TargetData td = llvm::TargetData::TargetData(&TheModule); |
| 1153 | Elements.push_back(llvm::ConstantInt::get(LongTy, td.getTypeSizeInBits(ModuleTy)/8)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1154 | //FIXME: Should be the path to the file where this module was declared |
| 1155 | Elements.push_back(NULLPtr); |
| 1156 | Elements.push_back(SymTab); |
| 1157 | llvm::Value *Module = MakeGlobal(ModuleTy, Elements); |
| 1158 | |
| 1159 | // Create the load function calling the runtime entry point with the module |
| 1160 | // structure |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1161 | llvm::Function * LoadFunction = llvm::Function::Create( |
Chris Lattner | b59761b | 2009-07-01 04:13:52 +0000 | [diff] [blame] | 1162 | llvm::FunctionType::get(llvm::Type::VoidTy, false), |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1163 | llvm::GlobalValue::InternalLinkage, ".objc_load_function", |
| 1164 | &TheModule); |
| 1165 | llvm::BasicBlock *EntryBB = llvm::BasicBlock::Create("entry", LoadFunction); |
Daniel Dunbar | 45d196b | 2008-11-01 01:53:16 +0000 | [diff] [blame] | 1166 | CGBuilderTy Builder; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1167 | Builder.SetInsertPoint(EntryBB); |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 1168 | |
| 1169 | std::vector<const llvm::Type*> Params(1, |
| 1170 | llvm::PointerType::getUnqual(ModuleTy)); |
| 1171 | llvm::Value *Register = CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
| 1172 | llvm::Type::VoidTy, Params, true), "__objc_exec_class"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1173 | Builder.CreateCall(Register, Module); |
| 1174 | Builder.CreateRetVoid(); |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1175 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1176 | return LoadFunction; |
| 1177 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 1178 | |
Fariborz Jahanian | 679a502 | 2009-01-10 21:06:09 +0000 | [diff] [blame] | 1179 | llvm::Function *CGObjCGNU::GenerateMethod(const ObjCMethodDecl *OMD, |
| 1180 | const ObjCContainerDecl *CD) { |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 1181 | const ObjCCategoryImplDecl *OCD = |
Steve Naroff | 3e0a540 | 2009-01-08 19:41:02 +0000 | [diff] [blame] | 1182 | dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
Chris Lattner | 077bf5e | 2008-11-24 03:33:13 +0000 | [diff] [blame] | 1183 | std::string CategoryName = OCD ? OCD->getNameAsString() : ""; |
| 1184 | std::string ClassName = OMD->getClassInterface()->getNameAsString(); |
| 1185 | std::string MethodName = OMD->getSelector().getAsString(); |
Douglas Gregor | f8d49f6 | 2009-01-09 17:18:27 +0000 | [diff] [blame] | 1186 | bool isClassMethod = !OMD->isInstanceMethod(); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 1187 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 1188 | CodeGenTypes &Types = CGM.getTypes(); |
Daniel Dunbar | 45c25ba | 2008-09-10 04:01:49 +0000 | [diff] [blame] | 1189 | const llvm::FunctionType *MethodTy = |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 1190 | Types.GetFunctionType(Types.getFunctionInfo(OMD), OMD->isVariadic()); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1191 | std::string FunctionName = SymbolNameForMethod(ClassName, CategoryName, |
| 1192 | MethodName, isClassMethod); |
| 1193 | |
Gabor Greif | 984d0b4 | 2008-04-06 20:42:52 +0000 | [diff] [blame] | 1194 | llvm::Function *Method = llvm::Function::Create(MethodTy, |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1195 | llvm::GlobalValue::InternalLinkage, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1196 | FunctionName, |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1197 | &TheModule); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1198 | return Method; |
| 1199 | } |
| 1200 | |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 1201 | llvm::Function *CGObjCGNU::GetPropertyGetFunction() { |
Fariborz Jahanian | cb9dad0 | 2009-05-19 00:28:43 +0000 | [diff] [blame] | 1202 | std::vector<const llvm::Type*> Params; |
| 1203 | const llvm::Type *BoolTy = |
| 1204 | CGM.getTypes().ConvertType(CGM.getContext().BoolTy); |
| 1205 | Params.push_back(IdTy); |
| 1206 | Params.push_back(SelectorTy); |
| 1207 | // FIXME: Using LongTy for ptrdiff_t is probably broken on Win64 |
| 1208 | Params.push_back(LongTy); |
| 1209 | Params.push_back(BoolTy); |
| 1210 | // void objc_getProperty (id, SEL, ptrdiff_t, bool) |
| 1211 | const llvm::FunctionType *FTy = |
| 1212 | llvm::FunctionType::get(IdTy, Params, false); |
| 1213 | return cast<llvm::Function>(CGM.CreateRuntimeFunction(FTy, |
| 1214 | "objc_getProperty")); |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | llvm::Function *CGObjCGNU::GetPropertySetFunction() { |
Fariborz Jahanian | cb9dad0 | 2009-05-19 00:28:43 +0000 | [diff] [blame] | 1218 | std::vector<const llvm::Type*> Params; |
| 1219 | const llvm::Type *BoolTy = |
| 1220 | CGM.getTypes().ConvertType(CGM.getContext().BoolTy); |
| 1221 | Params.push_back(IdTy); |
| 1222 | Params.push_back(SelectorTy); |
| 1223 | // FIXME: Using LongTy for ptrdiff_t is probably broken on Win64 |
| 1224 | Params.push_back(LongTy); |
| 1225 | Params.push_back(IdTy); |
| 1226 | Params.push_back(BoolTy); |
| 1227 | Params.push_back(BoolTy); |
| 1228 | // void objc_setProperty (id, SEL, ptrdiff_t, id, bool, bool) |
| 1229 | const llvm::FunctionType *FTy = |
| 1230 | llvm::FunctionType::get(llvm::Type::VoidTy, Params, false); |
| 1231 | return cast<llvm::Function>(CGM.CreateRuntimeFunction(FTy, |
| 1232 | "objc_setProperty")); |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 1233 | } |
| 1234 | |
| 1235 | llvm::Function *CGObjCGNU::EnumerationMutationFunction() { |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 1236 | std::vector<const llvm::Type*> Params(1, IdTy); |
| 1237 | return cast<llvm::Function>(CGM.CreateRuntimeFunction( |
| 1238 | llvm::FunctionType::get(llvm::Type::VoidTy, Params, true), |
| 1239 | "objc_enumerationMutation")); |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1240 | } |
| 1241 | |
Fariborz Jahanian | bd71be4 | 2008-11-21 00:49:24 +0000 | [diff] [blame] | 1242 | void CGObjCGNU::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF, |
| 1243 | const Stmt &S) { |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1244 | // Pointer to the personality function |
| 1245 | llvm::Constant *Personality = |
| 1246 | CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::Int32Ty, |
Chris Lattner | b59761b | 2009-07-01 04:13:52 +0000 | [diff] [blame] | 1247 | true), |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1248 | "__gnu_objc_personality_v0"); |
| 1249 | Personality = llvm::ConstantExpr::getBitCast(Personality, PtrTy); |
| 1250 | std::vector<const llvm::Type*> Params; |
| 1251 | Params.push_back(PtrTy); |
| 1252 | llvm::Value *RethrowFn = |
| 1253 | CGM.CreateRuntimeFunction(llvm::FunctionType::get(llvm::Type::VoidTy, |
| 1254 | Params, false), "_Unwind_Resume_or_Rethrow"); |
| 1255 | |
| 1256 | bool isTry = isa<ObjCAtTryStmt>(S); |
| 1257 | llvm::BasicBlock *TryBlock = CGF.createBasicBlock("try"); |
| 1258 | llvm::BasicBlock *PrevLandingPad = CGF.getInvokeDest(); |
| 1259 | llvm::BasicBlock *TryHandler = CGF.createBasicBlock("try.handler"); |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1260 | llvm::BasicBlock *CatchInCatch = CGF.createBasicBlock("catch.rethrow"); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1261 | llvm::BasicBlock *FinallyBlock = CGF.createBasicBlock("finally"); |
| 1262 | llvm::BasicBlock *FinallyRethrow = CGF.createBasicBlock("finally.throw"); |
| 1263 | llvm::BasicBlock *FinallyEnd = CGF.createBasicBlock("finally.end"); |
| 1264 | |
| 1265 | // GNU runtime does not currently support @synchronized() |
| 1266 | if (!isTry) { |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1267 | std::vector<const llvm::Type*> Args(1, IdTy); |
| 1268 | llvm::FunctionType *FTy = |
| 1269 | llvm::FunctionType::get(llvm::Type::VoidTy, Args, false); |
| 1270 | llvm::Value *SyncEnter = CGM.CreateRuntimeFunction(FTy, "objc_sync_enter"); |
| 1271 | llvm::Value *SyncArg = |
| 1272 | CGF.EmitScalarExpr(cast<ObjCAtSynchronizedStmt>(S).getSynchExpr()); |
| 1273 | SyncArg = CGF.Builder.CreateBitCast(SyncArg, IdTy); |
| 1274 | CGF.Builder.CreateCall(SyncEnter, SyncArg); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1275 | } |
| 1276 | |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1277 | |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1278 | // Push an EH context entry, used for handling rethrows and jumps |
| 1279 | // through finally. |
| 1280 | CGF.PushCleanupBlock(FinallyBlock); |
| 1281 | |
| 1282 | // Emit the statements in the @try {} block |
| 1283 | CGF.setInvokeDest(TryHandler); |
| 1284 | |
| 1285 | CGF.EmitBlock(TryBlock); |
| 1286 | CGF.EmitStmt(isTry ? cast<ObjCAtTryStmt>(S).getTryBody() |
| 1287 | : cast<ObjCAtSynchronizedStmt>(S).getSynchBody()); |
| 1288 | |
| 1289 | // Jump to @finally if there is no exception |
| 1290 | CGF.EmitBranchThroughCleanup(FinallyEnd); |
| 1291 | |
| 1292 | // Emit the handlers |
| 1293 | CGF.EmitBlock(TryHandler); |
| 1294 | |
Chris Lattner | bb422ad | 2009-05-08 17:36:08 +0000 | [diff] [blame] | 1295 | // Get the correct versions of the exception handling intrinsics |
| 1296 | llvm::TargetData td = llvm::TargetData::TargetData(&TheModule); |
| 1297 | int PointerWidth = td.getTypeSizeInBits(PtrTy); |
| 1298 | assert((PointerWidth == 32 || PointerWidth == 64) && |
| 1299 | "Can't yet handle exceptions if pointers are not 32 or 64 bits"); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1300 | llvm::Value *llvm_eh_exception = |
| 1301 | CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_exception); |
Chris Lattner | bb422ad | 2009-05-08 17:36:08 +0000 | [diff] [blame] | 1302 | llvm::Value *llvm_eh_selector = PointerWidth == 32 ? |
| 1303 | CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_selector_i32) : |
| 1304 | CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_selector_i64); |
| 1305 | llvm::Value *llvm_eh_typeid_for = PointerWidth == 32 ? |
| 1306 | CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_typeid_for_i32) : |
| 1307 | CGF.CGM.getIntrinsic(llvm::Intrinsic::eh_typeid_for_i64); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1308 | |
| 1309 | // Exception object |
| 1310 | llvm::Value *Exc = CGF.Builder.CreateCall(llvm_eh_exception, "exc"); |
| 1311 | llvm::Value *RethrowPtr = CGF.CreateTempAlloca(Exc->getType(), "_rethrow"); |
| 1312 | |
| 1313 | llvm::SmallVector<llvm::Value*, 8> ESelArgs; |
| 1314 | llvm::SmallVector<std::pair<const ParmVarDecl*, const Stmt*>, 8> Handlers; |
| 1315 | |
| 1316 | ESelArgs.push_back(Exc); |
| 1317 | ESelArgs.push_back(Personality); |
| 1318 | |
| 1319 | bool HasCatchAll = false; |
| 1320 | // Only @try blocks are allowed @catch blocks, but both can have @finally |
| 1321 | if (isTry) { |
| 1322 | if (const ObjCAtCatchStmt* CatchStmt = |
| 1323 | cast<ObjCAtTryStmt>(S).getCatchStmts()) { |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1324 | CGF.setInvokeDest(CatchInCatch); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1325 | |
| 1326 | for (; CatchStmt; CatchStmt = CatchStmt->getNextCatchStmt()) { |
| 1327 | const ParmVarDecl *CatchDecl = CatchStmt->getCatchParamDecl(); |
| 1328 | Handlers.push_back(std::make_pair(CatchDecl, CatchStmt->getCatchBody())); |
| 1329 | |
| 1330 | // @catch() and @catch(id) both catch any ObjC exception |
| 1331 | if (!CatchDecl || CGF.getContext().isObjCIdType(CatchDecl->getType()) |
| 1332 | || CatchDecl->getType()->isObjCQualifiedIdType()) { |
| 1333 | // Use i8* null here to signal this is a catch all, not a cleanup. |
| 1334 | ESelArgs.push_back(NULLPtr); |
| 1335 | HasCatchAll = true; |
| 1336 | // No further catches after this one will ever by reached |
| 1337 | break; |
| 1338 | } |
| 1339 | |
| 1340 | // All other types should be Objective-C interface pointer types. |
| 1341 | const PointerType *PT = CatchDecl->getType()->getAsPointerType(); |
| 1342 | assert(PT && "Invalid @catch type."); |
| 1343 | const ObjCInterfaceType *IT = |
| 1344 | PT->getPointeeType()->getAsObjCInterfaceType(); |
| 1345 | assert(IT && "Invalid @catch type."); |
Chris Lattner | bb422ad | 2009-05-08 17:36:08 +0000 | [diff] [blame] | 1346 | llvm::Value *EHType = |
| 1347 | MakeConstantString(IT->getDecl()->getNameAsString()); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1348 | ESelArgs.push_back(EHType); |
| 1349 | } |
| 1350 | } |
| 1351 | } |
| 1352 | |
| 1353 | // We use a cleanup unless there was already a catch all. |
| 1354 | if (!HasCatchAll) { |
| 1355 | ESelArgs.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); |
| 1356 | Handlers.push_back(std::make_pair((const ParmVarDecl*) 0, (const Stmt*) 0)); |
| 1357 | } |
| 1358 | |
| 1359 | // Find which handler was matched. |
Chris Lattner | bb422ad | 2009-05-08 17:36:08 +0000 | [diff] [blame] | 1360 | llvm::Value *ESelector = CGF.Builder.CreateCall(llvm_eh_selector, |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1361 | ESelArgs.begin(), ESelArgs.end(), "selector"); |
| 1362 | |
| 1363 | for (unsigned i = 0, e = Handlers.size(); i != e; ++i) { |
| 1364 | const ParmVarDecl *CatchParam = Handlers[i].first; |
| 1365 | const Stmt *CatchBody = Handlers[i].second; |
| 1366 | |
| 1367 | llvm::BasicBlock *Next = 0; |
| 1368 | |
| 1369 | // The last handler always matches. |
| 1370 | if (i + 1 != e) { |
| 1371 | assert(CatchParam && "Only last handler can be a catch all."); |
| 1372 | |
| 1373 | // Test whether this block matches the type for the selector and branch |
| 1374 | // to Match if it does, or to the next BB if it doesn't. |
| 1375 | llvm::BasicBlock *Match = CGF.createBasicBlock("match"); |
| 1376 | Next = CGF.createBasicBlock("catch.next"); |
Chris Lattner | bb422ad | 2009-05-08 17:36:08 +0000 | [diff] [blame] | 1377 | llvm::Value *Id = CGF.Builder.CreateCall(llvm_eh_typeid_for, |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1378 | CGF.Builder.CreateBitCast(ESelArgs[i+2], PtrTy)); |
| 1379 | CGF.Builder.CreateCondBr(CGF.Builder.CreateICmpEQ(ESelector, Id), Match, |
| 1380 | Next); |
| 1381 | |
| 1382 | CGF.EmitBlock(Match); |
| 1383 | } |
| 1384 | |
| 1385 | if (CatchBody) { |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1386 | llvm::Value *ExcObject = CGF.Builder.CreateBitCast(Exc, |
| 1387 | CGF.ConvertType(CatchParam->getType())); |
| 1388 | |
| 1389 | // Bind the catch parameter if it exists. |
| 1390 | if (CatchParam) { |
| 1391 | // CatchParam is a ParmVarDecl because of the grammar |
| 1392 | // construction used to handle this, but for codegen purposes |
| 1393 | // we treat this as a local decl. |
| 1394 | CGF.EmitLocalBlockVarDecl(*CatchParam); |
| 1395 | CGF.Builder.CreateStore(ExcObject, CGF.GetAddrOfLocalVar(CatchParam)); |
| 1396 | } |
| 1397 | |
| 1398 | CGF.ObjCEHValueStack.push_back(ExcObject); |
| 1399 | CGF.EmitStmt(CatchBody); |
| 1400 | CGF.ObjCEHValueStack.pop_back(); |
| 1401 | |
| 1402 | CGF.EmitBranchThroughCleanup(FinallyEnd); |
| 1403 | |
| 1404 | if (Next) |
| 1405 | CGF.EmitBlock(Next); |
| 1406 | } else { |
| 1407 | assert(!Next && "catchup should be last handler."); |
| 1408 | |
| 1409 | CGF.Builder.CreateStore(Exc, RethrowPtr); |
| 1410 | CGF.EmitBranchThroughCleanup(FinallyRethrow); |
| 1411 | } |
| 1412 | } |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1413 | // The @finally block is a secondary landing pad for any exceptions thrown in |
| 1414 | // @catch() blocks |
| 1415 | CGF.EmitBlock(CatchInCatch); |
| 1416 | Exc = CGF.Builder.CreateCall(llvm_eh_exception, "exc"); |
| 1417 | ESelArgs.clear(); |
| 1418 | ESelArgs.push_back(Exc); |
| 1419 | ESelArgs.push_back(Personality); |
| 1420 | ESelArgs.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); |
| 1421 | CGF.Builder.CreateCall(llvm_eh_selector, ESelArgs.begin(), ESelArgs.end(), |
| 1422 | "selector"); |
| 1423 | CGF.Builder.CreateCall(llvm_eh_typeid_for, |
| 1424 | CGF.Builder.CreateIntToPtr(ESelArgs[2], PtrTy)); |
| 1425 | CGF.Builder.CreateStore(Exc, RethrowPtr); |
| 1426 | CGF.EmitBranchThroughCleanup(FinallyRethrow); |
| 1427 | |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1428 | CodeGenFunction::CleanupBlockInfo Info = CGF.PopCleanupBlock(); |
| 1429 | |
| 1430 | CGF.setInvokeDest(PrevLandingPad); |
| 1431 | |
| 1432 | CGF.EmitBlock(FinallyBlock); |
| 1433 | |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1434 | |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1435 | if (isTry) { |
| 1436 | if (const ObjCAtFinallyStmt* FinallyStmt = |
| 1437 | cast<ObjCAtTryStmt>(S).getFinallyStmt()) |
| 1438 | CGF.EmitStmt(FinallyStmt->getFinallyBody()); |
| 1439 | } else { |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1440 | // Emit 'objc_sync_exit(expr)' as finally's sole statement for |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1441 | // @synchronized. |
Chris Lattner | d6a9907 | 2009-05-11 18:16:28 +0000 | [diff] [blame] | 1442 | std::vector<const llvm::Type*> Args(1, IdTy); |
| 1443 | llvm::FunctionType *FTy = |
| 1444 | llvm::FunctionType::get(llvm::Type::VoidTy, Args, false); |
| 1445 | llvm::Value *SyncExit = CGM.CreateRuntimeFunction(FTy, "objc_sync_exit"); |
| 1446 | llvm::Value *SyncArg = |
| 1447 | CGF.EmitScalarExpr(cast<ObjCAtSynchronizedStmt>(S).getSynchExpr()); |
| 1448 | SyncArg = CGF.Builder.CreateBitCast(SyncArg, IdTy); |
| 1449 | CGF.Builder.CreateCall(SyncExit, SyncArg); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1450 | } |
| 1451 | |
| 1452 | if (Info.SwitchBlock) |
| 1453 | CGF.EmitBlock(Info.SwitchBlock); |
| 1454 | if (Info.EndBlock) |
| 1455 | CGF.EmitBlock(Info.EndBlock); |
| 1456 | |
| 1457 | // Branch around the rethrow code. |
| 1458 | CGF.EmitBranch(FinallyEnd); |
| 1459 | |
| 1460 | CGF.EmitBlock(FinallyRethrow); |
| 1461 | CGF.Builder.CreateCall(RethrowFn, CGF.Builder.CreateLoad(RethrowPtr)); |
| 1462 | CGF.Builder.CreateUnreachable(); |
| 1463 | |
| 1464 | CGF.EmitBlock(FinallyEnd); |
| 1465 | |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 1466 | } |
| 1467 | |
| 1468 | void CGObjCGNU::EmitThrowStmt(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 1469 | const ObjCAtThrowStmt &S) { |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1470 | llvm::Value *ExceptionAsObject; |
| 1471 | |
| 1472 | std::vector<const llvm::Type*> Args(1, IdTy); |
| 1473 | llvm::FunctionType *FTy = |
| 1474 | llvm::FunctionType::get(llvm::Type::VoidTy, Args, false); |
| 1475 | llvm::Value *ThrowFn = |
| 1476 | CGM.CreateRuntimeFunction(FTy, "objc_exception_throw"); |
| 1477 | |
| 1478 | if (const Expr *ThrowExpr = S.getThrowExpr()) { |
| 1479 | llvm::Value *Exception = CGF.EmitScalarExpr(ThrowExpr); |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 1480 | ExceptionAsObject = Exception; |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1481 | } else { |
| 1482 | assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) && |
| 1483 | "Unexpected rethrow outside @catch block."); |
| 1484 | ExceptionAsObject = CGF.ObjCEHValueStack.back(); |
| 1485 | } |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 1486 | ExceptionAsObject = |
| 1487 | CGF.Builder.CreateBitCast(ExceptionAsObject, IdTy, "tmp"); |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 1488 | |
| 1489 | // Note: This may have to be an invoke, if we want to support constructs like: |
| 1490 | // @try { |
| 1491 | // @throw(obj); |
| 1492 | // } |
| 1493 | // @catch(id) ... |
| 1494 | // |
| 1495 | // This is effectively turning @throw into an incredibly-expensive goto, but |
| 1496 | // it may happen as a result of inlining followed by missed optimizations, or |
| 1497 | // as a result of stupidity. |
| 1498 | llvm::BasicBlock *UnwindBB = CGF.getInvokeDest(); |
| 1499 | if (!UnwindBB) { |
| 1500 | CGF.Builder.CreateCall(ThrowFn, ExceptionAsObject); |
| 1501 | CGF.Builder.CreateUnreachable(); |
| 1502 | } else { |
| 1503 | CGF.Builder.CreateInvoke(ThrowFn, UnwindBB, UnwindBB, &ExceptionAsObject, |
| 1504 | &ExceptionAsObject+1); |
| 1505 | } |
| 1506 | // Clear the insertion point to indicate we are in unreachable code. |
| 1507 | CGF.Builder.ClearInsertionPoint(); |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 1508 | } |
| 1509 | |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 1510 | llvm::Value * CGObjCGNU::EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF, |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 1511 | llvm::Value *AddrWeakObj) |
| 1512 | { |
| 1513 | return 0; |
| 1514 | } |
| 1515 | |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 1516 | void CGObjCGNU::EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF, |
| 1517 | llvm::Value *src, llvm::Value *dst) |
| 1518 | { |
| 1519 | return; |
| 1520 | } |
| 1521 | |
Fariborz Jahanian | 5862650 | 2008-11-19 00:59:10 +0000 | [diff] [blame] | 1522 | void CGObjCGNU::EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF, |
| 1523 | llvm::Value *src, llvm::Value *dst) |
| 1524 | { |
| 1525 | return; |
| 1526 | } |
| 1527 | |
Fariborz Jahanian | 7eda836 | 2008-11-20 19:23:36 +0000 | [diff] [blame] | 1528 | void CGObjCGNU::EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF, |
| 1529 | llvm::Value *src, llvm::Value *dst) |
| 1530 | { |
| 1531 | return; |
| 1532 | } |
| 1533 | |
Fariborz Jahanian | 5862650 | 2008-11-19 00:59:10 +0000 | [diff] [blame] | 1534 | void CGObjCGNU::EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF, |
| 1535 | llvm::Value *src, llvm::Value *dst) |
| 1536 | { |
| 1537 | return; |
| 1538 | } |
| 1539 | |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1540 | llvm::GlobalVariable *CGObjCGNU::ObjCIvarOffsetVariable( |
| 1541 | const ObjCInterfaceDecl *ID, |
| 1542 | const ObjCIvarDecl *Ivar) { |
| 1543 | const std::string Name = "__objc_ivar_offset_" + ID->getNameAsString() |
| 1544 | + '.' + Ivar->getNameAsString(); |
| 1545 | // Emit the variable and initialize it with what we think the correct value |
| 1546 | // is. This allows code compiled with non-fragile ivars to work correctly |
| 1547 | // when linked against code which isn't (most of the time). |
| 1548 | llvm::GlobalVariable *IvarOffsetGV = CGM.getModule().getGlobalVariable(Name); |
| 1549 | if (!IvarOffsetGV) { |
| 1550 | uint64_t Offset = ComputeIvarBaseOffset(CGM, ID, Ivar); |
| 1551 | llvm::ConstantInt *OffsetGuess = |
| 1552 | llvm::ConstantInt::get(LongTy, Offset, "ivar"); |
| 1553 | IvarOffsetGV = new llvm::GlobalVariable(LongTy, false, |
| 1554 | llvm::GlobalValue::CommonLinkage, OffsetGuess, Name, &TheModule); |
| 1555 | } |
| 1556 | return IvarOffsetGV; |
| 1557 | } |
| 1558 | |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1559 | LValue CGObjCGNU::EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, |
| 1560 | QualType ObjectTy, |
| 1561 | llvm::Value *BaseValue, |
| 1562 | const ObjCIvarDecl *Ivar, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1563 | unsigned CVRQualifiers) { |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 1564 | const ObjCInterfaceDecl *ID = ObjectTy->getAsObjCInterfaceType()->getDecl(); |
Daniel Dunbar | 9777687 | 2009-04-22 07:32:20 +0000 | [diff] [blame] | 1565 | return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers, |
| 1566 | EmitIvarOffset(CGF, ID, Ivar)); |
Fariborz Jahanian | 0bb2036 | 2009-02-02 20:02:29 +0000 | [diff] [blame] | 1567 | } |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1568 | static const ObjCInterfaceDecl *FindIvarInterface(ASTContext &Context, |
| 1569 | const ObjCInterfaceDecl *OID, |
| 1570 | const ObjCIvarDecl *OIVD) { |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1571 | llvm::SmallVector<ObjCIvarDecl*, 16> Ivars; |
Fariborz Jahanian | 8e6ac1d | 2009-06-04 01:19:09 +0000 | [diff] [blame] | 1572 | Context.ShallowCollectObjCIvars(OID, Ivars); |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1573 | for (unsigned k = 0, e = Ivars.size(); k != e; ++k) { |
| 1574 | if (OIVD == Ivars[k]) |
| 1575 | return OID; |
| 1576 | } |
| 1577 | |
| 1578 | // Otherwise check in the super class. |
| 1579 | if (const ObjCInterfaceDecl *Super = OID->getSuperClass()) |
| 1580 | return FindIvarInterface(Context, Super, OIVD); |
| 1581 | |
| 1582 | return 0; |
| 1583 | } |
Fariborz Jahanian | 0bb2036 | 2009-02-02 20:02:29 +0000 | [diff] [blame] | 1584 | |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 1585 | llvm::Value *CGObjCGNU::EmitIvarOffset(CodeGen::CodeGenFunction &CGF, |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame] | 1586 | const ObjCInterfaceDecl *Interface, |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 1587 | const ObjCIvarDecl *Ivar) { |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1588 | if (CGF.getContext().getLangOptions().ObjCNonFragileABI) |
| 1589 | { |
| 1590 | Interface = FindIvarInterface(CGM.getContext(), Interface, Ivar); |
| 1591 | return CGF.Builder.CreateLoad(ObjCIvarOffsetVariable(Interface, Ivar), |
| 1592 | false, "ivar"); |
| 1593 | } |
Daniel Dunbar | 9777687 | 2009-04-22 07:32:20 +0000 | [diff] [blame] | 1594 | uint64_t Offset = ComputeIvarBaseOffset(CGF.CGM, Interface, Ivar); |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 1595 | return llvm::ConstantInt::get(LongTy, Offset, "ivar"); |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 1596 | } |
| 1597 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 1598 | CodeGen::CGObjCRuntime *CodeGen::CreateGNUObjCRuntime(CodeGen::CodeGenModule &CGM){ |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 1599 | return new CGObjCGNU(CGM); |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 1600 | } |