Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 1 | //===------- CGObjCMac.cpp - Interface to Apple Objective-C Runtime -------===// |
| 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 | // |
| 10 | // This provides Objective-C code generation targetting the Apple runtime. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CGObjCRuntime.h" |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame^] | 15 | |
| 16 | #include "CodeGenModule.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 17 | #include "clang/AST/Decl.h" |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame^] | 18 | #include "clang/Basic/LangOptions.h" |
| 19 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 20 | #include "llvm/Support/IRBuilder.h" |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 21 | |
| 22 | using namespace clang; |
| 23 | |
| 24 | namespace { |
| 25 | class CGObjCMac : public CodeGen::CGObjCRuntime { |
| 26 | private: |
| 27 | CodeGen::CodeGenModule &CGM; |
| 28 | |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame^] | 29 | /// UsedGlobals - list of globals to pack into the llvm.used metadata |
| 30 | /// to prevent them from being clobbered. |
| 31 | std::vector<llvm::GlobalValue*> UsedGlobals; |
| 32 | |
| 33 | /// EmitImageInfo - Emit the image info marker used to encode some module |
| 34 | /// level information. |
| 35 | void EmitImageInfo(); |
| 36 | |
| 37 | /// FinishModule - Write out global data structures at the end of |
| 38 | /// processing a translation unit. |
| 39 | void FinishModule(); |
| 40 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 41 | public: |
| 42 | CGObjCMac(CodeGen::CodeGenModule &cgm); |
| 43 | virtual llvm::Constant *GenerateConstantString(const char *String, |
| 44 | const size_t length); |
| 45 | |
| 46 | virtual llvm::Value *GenerateMessageSend(llvm::IRBuilder<> &Builder, |
| 47 | const llvm::Type *ReturnTy, |
| 48 | llvm::Value *Sender, |
| 49 | llvm::Value *Receiver, |
| 50 | Selector Sel, |
| 51 | llvm::Value** ArgV, |
| 52 | unsigned ArgC); |
| 53 | |
| 54 | virtual llvm::Value *GenerateMessageSendSuper(llvm::IRBuilder<> &Builder, |
| 55 | const llvm::Type *ReturnTy, |
| 56 | llvm::Value *Sender, |
| 57 | const char *SuperClassName, |
| 58 | llvm::Value *Receiver, |
| 59 | Selector Sel, |
| 60 | llvm::Value** ArgV, |
| 61 | unsigned ArgC); |
| 62 | |
| 63 | virtual llvm::Value *LookupClass(llvm::IRBuilder<> &Builder, |
| 64 | llvm::Value *ClassName); |
| 65 | |
| 66 | virtual llvm::Value *GetSelector(llvm::IRBuilder<> &Builder, Selector Sel); |
| 67 | |
| 68 | virtual llvm::Function *MethodPreamble(const std::string &ClassName, |
| 69 | const std::string &CategoryName, |
| 70 | const std::string &MethodName, |
| 71 | const llvm::Type *ReturnTy, |
| 72 | const llvm::Type *SelfTy, |
| 73 | const llvm::Type **ArgTy, |
| 74 | unsigned ArgC, |
| 75 | bool isClassMethod, |
| 76 | bool isVarArg); |
| 77 | |
| 78 | virtual void GenerateCategory(const char *ClassName, const char *CategoryName, |
| 79 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 80 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 81 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 82 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 83 | const llvm::SmallVectorImpl<std::string> &Protocols); |
| 84 | |
| 85 | virtual void GenerateClass( |
| 86 | const char *ClassName, |
| 87 | const char *SuperClassName, |
| 88 | const int instanceSize, |
| 89 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, |
| 90 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, |
| 91 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets, |
| 92 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 93 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 94 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 95 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 96 | const llvm::SmallVectorImpl<std::string> &Protocols); |
| 97 | |
| 98 | virtual llvm::Value *GenerateProtocolRef(llvm::IRBuilder<> &Builder, |
| 99 | const char *ProtocolName); |
| 100 | |
| 101 | virtual void GenerateProtocol(const char *ProtocolName, |
| 102 | const llvm::SmallVectorImpl<std::string> &Protocols, |
| 103 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames, |
| 104 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 105 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames, |
| 106 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes); |
| 107 | |
| 108 | virtual llvm::Function *ModuleInitFunction(); |
| 109 | }; |
| 110 | } // end anonymous namespace |
| 111 | |
| 112 | CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) : CGM(cgm) { |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame^] | 113 | EmitImageInfo(); |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | // This has to perform the lookup every time, since posing and related |
| 117 | // techniques can modify the name -> class mapping. |
| 118 | llvm::Value *CGObjCMac::LookupClass(llvm::IRBuilder<> &Builder, |
| 119 | llvm::Value *ClassName) { |
| 120 | assert(0 && "Cannot lookup classes on Mac runtime."); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /// GetSelector - Return the pointer to the unique'd string for this selector. |
| 125 | llvm::Value *CGObjCMac::GetSelector(llvm::IRBuilder<> &Builder, Selector Sel) { |
| 126 | assert(0 && "Cannot get selector on Mac runtime."); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | /// Generate an NSConstantString object. |
| 131 | llvm::Constant *CGObjCMac::GenerateConstantString(const char *String, |
| 132 | const size_t length) { |
| 133 | assert(0 && "Cannot generate constant string for Mac runtime."); |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | /// Generates a message send where the super is the receiver. This is |
| 138 | /// a message send to self with special delivery semantics indicating |
| 139 | /// which class's method should be called. |
| 140 | llvm::Value *CGObjCMac::GenerateMessageSendSuper(llvm::IRBuilder<> &Builder, |
| 141 | const llvm::Type *ReturnTy, |
| 142 | llvm::Value *Sender, |
| 143 | const char *SuperClassName, |
| 144 | llvm::Value *Receiver, |
| 145 | Selector Sel, |
| 146 | llvm::Value** ArgV, |
| 147 | unsigned ArgC) { |
| 148 | assert(0 && "Cannot generate message send to super for Mac runtime."); |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | /// Generate code for a message send expression. |
| 153 | llvm::Value *CGObjCMac::GenerateMessageSend(llvm::IRBuilder<> &Builder, |
| 154 | const llvm::Type *ReturnTy, |
| 155 | llvm::Value *Sender, |
| 156 | llvm::Value *Receiver, |
| 157 | Selector Sel, |
| 158 | llvm::Value** ArgV, |
| 159 | unsigned ArgC) { |
| 160 | assert(0 && "Cannot generate message send for Mac runtime."); |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | llvm::Value *CGObjCMac::GenerateProtocolRef(llvm::IRBuilder<> &Builder, |
| 165 | const char *ProtocolName) { |
| 166 | assert(0 && "Cannot get protocol reference on Mac runtime."); |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | void CGObjCMac::GenerateProtocol(const char *ProtocolName, |
| 171 | const llvm::SmallVectorImpl<std::string> &Protocols, |
| 172 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames, |
| 173 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 174 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames, |
| 175 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes) { |
| 176 | assert(0 && "Cannot generate protocol for Mac runtime."); |
| 177 | } |
| 178 | |
| 179 | void CGObjCMac::GenerateCategory( |
| 180 | const char *ClassName, |
| 181 | const char *CategoryName, |
| 182 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 183 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 184 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 185 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 186 | const llvm::SmallVectorImpl<std::string> &Protocols) { |
| 187 | assert(0 && "Cannot generate category for Mac runtime."); |
| 188 | } |
| 189 | |
| 190 | void CGObjCMac::GenerateClass( |
| 191 | const char *ClassName, |
| 192 | const char *SuperClassName, |
| 193 | const int instanceSize, |
| 194 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, |
| 195 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, |
| 196 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets, |
| 197 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 198 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 199 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 200 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 201 | const llvm::SmallVectorImpl<std::string> &Protocols) { |
| 202 | assert(0 && "Cannot generate class for Mac runtime."); |
| 203 | } |
| 204 | |
| 205 | llvm::Function *CGObjCMac::ModuleInitFunction() { |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame^] | 206 | // Abuse this interface function as a place to finalize. |
| 207 | FinishModule(); |
| 208 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | llvm::Function *CGObjCMac::MethodPreamble( |
| 213 | const std::string &ClassName, |
| 214 | const std::string &CategoryName, |
| 215 | const std::string &MethodName, |
| 216 | const llvm::Type *ReturnTy, |
| 217 | const llvm::Type *SelfTy, |
| 218 | const llvm::Type **ArgTy, |
| 219 | unsigned ArgC, |
| 220 | bool isClassMethod, |
| 221 | bool isVarArg) { |
| 222 | assert(0 && "Cannot generate method preamble for Mac runtime."); |
| 223 | return 0; |
| 224 | } |
| 225 | |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame^] | 226 | /* *** Private Interface *** */ |
| 227 | |
| 228 | /// EmitImageInfo - Emit the image info marker used to encode some module |
| 229 | /// level information. |
| 230 | /// |
| 231 | /// See: <rdr://4810609&4810587&4810587> |
| 232 | /// struct IMAGE_INFO { |
| 233 | /// unsigned version; |
| 234 | /// unsigned flags; |
| 235 | /// }; |
| 236 | enum ImageInfoFlags { |
| 237 | eImageInfo_FixAndContinue = (1 << 0), // FIXME: Not sure what this implies |
| 238 | eImageInfo_GarbageCollected = (1 << 1), |
| 239 | eImageInfo_GCOnly = (1 << 2) |
| 240 | }; |
| 241 | |
| 242 | void CGObjCMac::EmitImageInfo() { |
| 243 | unsigned version = 0; // Version is unused? |
| 244 | unsigned flags = 0; |
| 245 | |
| 246 | // FIXME: Fix and continue? |
| 247 | if (CGM.getLangOptions().getGCMode() != LangOptions::NonGC) |
| 248 | flags |= eImageInfo_GarbageCollected; |
| 249 | if (CGM.getLangOptions().getGCMode() == LangOptions::GCOnly) |
| 250 | flags |= eImageInfo_GCOnly; |
| 251 | |
| 252 | fprintf(stderr, "flags: %d (%d)\n", flags, CGM.getLangOptions().getGCMode()); |
| 253 | |
| 254 | // Emitted as int[2]; |
| 255 | llvm::Constant *values[2] = { |
| 256 | llvm::ConstantInt::get(llvm::Type::Int32Ty, version), |
| 257 | llvm::ConstantInt::get(llvm::Type::Int32Ty, flags) |
| 258 | }; |
| 259 | llvm::ArrayType *AT = llvm::ArrayType::get(llvm::Type::Int32Ty, 2); |
| 260 | llvm::GlobalValue *GV = |
| 261 | new llvm::GlobalVariable(AT, true, |
| 262 | llvm::GlobalValue::InternalLinkage, |
| 263 | llvm::ConstantArray::get(AT, values, 2), |
| 264 | "\01L_OBJC_IMAGE_INFO", |
| 265 | &CGM.getModule()); |
| 266 | |
| 267 | GV->setSection("__OBJC, __image_info,regular"); |
| 268 | |
| 269 | UsedGlobals.push_back(GV); |
| 270 | } |
| 271 | |
| 272 | void CGObjCMac::FinishModule() { |
| 273 | std::vector<llvm::Constant*> Used; |
| 274 | |
| 275 | llvm::Type *I8Ptr = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); |
| 276 | for (std::vector<llvm::GlobalValue*>::iterator i = UsedGlobals.begin(), |
| 277 | e = UsedGlobals.end(); i != e; ++i) { |
| 278 | Used.push_back(llvm::ConstantExpr::getBitCast(*i, I8Ptr)); |
| 279 | } |
| 280 | |
| 281 | llvm::ArrayType *AT = llvm::ArrayType::get(I8Ptr, Used.size()); |
| 282 | llvm::GlobalValue *GV = |
| 283 | new llvm::GlobalVariable(AT, false, |
| 284 | llvm::GlobalValue::AppendingLinkage, |
| 285 | llvm::ConstantArray::get(AT, Used), |
| 286 | "llvm.used", |
| 287 | &CGM.getModule()); |
| 288 | |
| 289 | GV->setSection("llvm.metadata"); |
| 290 | } |
| 291 | |
| 292 | /* *** */ |
| 293 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 294 | CodeGen::CGObjCRuntime *CodeGen::CreateMacObjCRuntime(CodeGen::CodeGenModule &CGM){ |
| 295 | return new CGObjCMac(CGM); |
| 296 | } |