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 | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 17 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 18 | #include "clang/AST/Decl.h" |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 19 | #include "clang/Basic/LangOptions.h" |
| 20 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 21 | #include "llvm/Module.h" |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 22 | #include "llvm/Support/IRBuilder.h" |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 23 | |
| 24 | using namespace clang; |
| 25 | |
| 26 | namespace { |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 27 | |
| 28 | /// ObjCTypesHelper - Helper class that encapsulates lazy |
| 29 | /// construction of varies types used during ObjC generation. |
| 30 | class ObjCTypesHelper { |
| 31 | private: |
| 32 | CodeGen::CodeGenModule &CGM; |
| 33 | |
| 34 | const llvm::StructType *CFStringType; |
| 35 | llvm::Constant *CFConstantStringClassReference; |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 36 | llvm::Function *MessageSendFn; |
| 37 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 38 | public: |
| 39 | const llvm::Type *LongTy; |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 40 | |
| 41 | /// ObjectTy - Opaque type for Objective-C objects |
| 42 | const llvm::Type *ObjectTy, *ObjectPtrTy; |
| 43 | /// SelectorTy - Opaque type for Objective-C selectors |
| 44 | const llvm::Type *SelectorTy, *SelectorPtrTy; |
| 45 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 46 | public: |
| 47 | ObjCTypesHelper(CodeGen::CodeGenModule &cgm); |
| 48 | ~ObjCTypesHelper(); |
| 49 | |
| 50 | llvm::Constant *getCFConstantStringClassReference(); |
| 51 | const llvm::StructType *getCFStringType(); |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 52 | llvm::Function *getMessageSendFn(); |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 53 | }; |
| 54 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 55 | class CGObjCMac : public CodeGen::CGObjCRuntime { |
| 56 | private: |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 57 | CodeGen::CodeGenModule &CGM; |
| 58 | ObjCTypesHelper ObjCTypes; |
| 59 | /// ObjCABI - FIXME: Not sure yet. |
| 60 | unsigned ObjCABI; |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 61 | |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 62 | /// MethodVarNames - uniqued method variable names. |
| 63 | llvm::DenseMap<Selector, llvm::GlobalVariable*> MethodVarNames; |
| 64 | |
| 65 | /// SelectorReferences - uniqued selector references. |
| 66 | llvm::DenseMap<Selector, llvm::GlobalVariable*> SelectorReferences; |
| 67 | |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 68 | /// UsedGlobals - list of globals to pack into the llvm.used metadata |
| 69 | /// to prevent them from being clobbered. |
| 70 | std::vector<llvm::GlobalValue*> UsedGlobals; |
| 71 | |
| 72 | /// EmitImageInfo - Emit the image info marker used to encode some module |
| 73 | /// level information. |
| 74 | void EmitImageInfo(); |
| 75 | |
| 76 | /// FinishModule - Write out global data structures at the end of |
| 77 | /// processing a translation unit. |
| 78 | void FinishModule(); |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 79 | |
| 80 | /// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy, |
| 81 | /// for the given selector. |
| 82 | llvm::Value *EmitSelector(llvm::IRBuilder<> &Builder, Selector Sel); |
| 83 | |
| 84 | /// GetMethodVarName - Return a unique constant for the given |
| 85 | /// selector's name. |
| 86 | llvm::Constant *GetMethodVarName(Selector Sel); |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 87 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 88 | public: |
| 89 | CGObjCMac(CodeGen::CodeGenModule &cgm); |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 90 | virtual llvm::Constant *GenerateConstantString(const std::string &String); |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 91 | |
| 92 | virtual llvm::Value *GenerateMessageSend(llvm::IRBuilder<> &Builder, |
| 93 | const llvm::Type *ReturnTy, |
| 94 | llvm::Value *Sender, |
| 95 | llvm::Value *Receiver, |
| 96 | Selector Sel, |
| 97 | llvm::Value** ArgV, |
| 98 | unsigned ArgC); |
| 99 | |
| 100 | virtual llvm::Value *GenerateMessageSendSuper(llvm::IRBuilder<> &Builder, |
| 101 | const llvm::Type *ReturnTy, |
| 102 | llvm::Value *Sender, |
| 103 | const char *SuperClassName, |
| 104 | llvm::Value *Receiver, |
| 105 | Selector Sel, |
| 106 | llvm::Value** ArgV, |
| 107 | unsigned ArgC); |
| 108 | |
| 109 | virtual llvm::Value *LookupClass(llvm::IRBuilder<> &Builder, |
| 110 | llvm::Value *ClassName); |
| 111 | |
| 112 | virtual llvm::Value *GetSelector(llvm::IRBuilder<> &Builder, Selector Sel); |
| 113 | |
| 114 | virtual llvm::Function *MethodPreamble(const std::string &ClassName, |
| 115 | const std::string &CategoryName, |
| 116 | const std::string &MethodName, |
| 117 | const llvm::Type *ReturnTy, |
| 118 | const llvm::Type *SelfTy, |
| 119 | const llvm::Type **ArgTy, |
| 120 | unsigned ArgC, |
| 121 | bool isClassMethod, |
| 122 | bool isVarArg); |
| 123 | |
| 124 | virtual void GenerateCategory(const char *ClassName, const char *CategoryName, |
| 125 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 126 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 127 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 128 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 129 | const llvm::SmallVectorImpl<std::string> &Protocols); |
| 130 | |
| 131 | virtual void GenerateClass( |
| 132 | const char *ClassName, |
| 133 | const char *SuperClassName, |
| 134 | const int instanceSize, |
| 135 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, |
| 136 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, |
| 137 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets, |
| 138 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 139 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 140 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 141 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 142 | const llvm::SmallVectorImpl<std::string> &Protocols); |
| 143 | |
| 144 | virtual llvm::Value *GenerateProtocolRef(llvm::IRBuilder<> &Builder, |
| 145 | const char *ProtocolName); |
| 146 | |
| 147 | virtual void GenerateProtocol(const char *ProtocolName, |
| 148 | const llvm::SmallVectorImpl<std::string> &Protocols, |
| 149 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames, |
| 150 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 151 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames, |
| 152 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes); |
| 153 | |
| 154 | virtual llvm::Function *ModuleInitFunction(); |
| 155 | }; |
| 156 | } // end anonymous namespace |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 157 | |
| 158 | /* *** Helper Functions *** */ |
| 159 | |
| 160 | /// getConstantGEP() - Help routine to construct simple GEPs. |
| 161 | static llvm::Constant *getConstantGEP(llvm::Constant *C, |
| 162 | unsigned idx0, |
| 163 | unsigned idx1) { |
| 164 | llvm::Value *Idxs[] = { |
| 165 | llvm::ConstantInt::get(llvm::Type::Int32Ty, idx0), |
| 166 | llvm::ConstantInt::get(llvm::Type::Int32Ty, idx1) |
| 167 | }; |
| 168 | return llvm::ConstantExpr::getGetElementPtr(C, Idxs, 2); |
| 169 | } |
| 170 | |
| 171 | /* *** CGObjCMac Public Interface *** */ |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 172 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 173 | CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) |
| 174 | : CGM(cgm), |
| 175 | ObjCTypes(cgm), |
| 176 | ObjCABI(1) |
| 177 | { |
| 178 | // FIXME: How does this get set in GCC? And what does it even mean? |
| 179 | if (ObjCTypes.LongTy != CGM.getTypes().ConvertType(CGM.getContext().IntTy)) |
| 180 | ObjCABI = 2; |
| 181 | |
| 182 | EmitImageInfo(); |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | // This has to perform the lookup every time, since posing and related |
| 186 | // techniques can modify the name -> class mapping. |
| 187 | llvm::Value *CGObjCMac::LookupClass(llvm::IRBuilder<> &Builder, |
| 188 | llvm::Value *ClassName) { |
| 189 | assert(0 && "Cannot lookup classes on Mac runtime."); |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | /// GetSelector - Return the pointer to the unique'd string for this selector. |
| 194 | llvm::Value *CGObjCMac::GetSelector(llvm::IRBuilder<> &Builder, Selector Sel) { |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 195 | return EmitSelector(Builder, Sel); |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 198 | /// Generate a constant CFString object. |
| 199 | /* |
| 200 | struct __builtin_CFString { |
| 201 | const int *isa; // point to __CFConstantStringClassReference |
| 202 | int flags; |
| 203 | const char *str; |
| 204 | long length; |
| 205 | }; |
| 206 | */ |
| 207 | |
| 208 | llvm::Constant *CGObjCMac::GenerateConstantString(const std::string &String) { |
| 209 | // FIXME: I have no idea what this constant is (it is a magic |
| 210 | // constant in GCC as well). Most likely the encoding of the string |
| 211 | // and at least one part of it relates to UTF-16. Is this just the |
| 212 | // code for UTF-8? Where is this handled for us? |
| 213 | // See: <rdr://2996215> |
| 214 | unsigned flags = 0x07c8; |
| 215 | |
| 216 | // FIXME: Use some machinery to unique this. We can't reuse the CGM |
| 217 | // one since we put them in a different section. |
| 218 | llvm::Constant *StringC = llvm::ConstantArray::get(String); |
| 219 | llvm::Constant *StringGV = |
| 220 | new llvm::GlobalVariable(StringC->getType(), true, |
| 221 | llvm::GlobalValue::InternalLinkage, |
| 222 | StringC, ".str", &CGM.getModule()); |
| 223 | llvm::Constant *Values[4] = { |
| 224 | ObjCTypes.getCFConstantStringClassReference(), |
| 225 | llvm::ConstantInt::get(llvm::Type::Int32Ty, flags), |
| 226 | getConstantGEP(StringGV, 0, 0), // Decay array -> ptr |
| 227 | llvm::ConstantInt::get(ObjCTypes.LongTy, String.size()) |
| 228 | }; |
| 229 | |
| 230 | llvm::Constant *CFStringC = |
| 231 | llvm::ConstantStruct::get(ObjCTypes.getCFStringType(), |
| 232 | std::vector<llvm::Constant*>(Values, Values+4)); |
| 233 | |
| 234 | llvm::GlobalVariable *CFStringGV = |
| 235 | new llvm::GlobalVariable(CFStringC->getType(), true, |
| 236 | llvm::GlobalValue::InternalLinkage, |
| 237 | CFStringC, "", |
| 238 | &CGM.getModule()); |
| 239 | |
| 240 | CFStringGV->setSection("__DATA, __cfstring"); |
| 241 | |
| 242 | return CFStringGV; |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | /// Generates a message send where the super is the receiver. This is |
| 246 | /// a message send to self with special delivery semantics indicating |
| 247 | /// which class's method should be called. |
| 248 | llvm::Value *CGObjCMac::GenerateMessageSendSuper(llvm::IRBuilder<> &Builder, |
| 249 | const llvm::Type *ReturnTy, |
| 250 | llvm::Value *Sender, |
| 251 | const char *SuperClassName, |
| 252 | llvm::Value *Receiver, |
| 253 | Selector Sel, |
| 254 | llvm::Value** ArgV, |
| 255 | unsigned ArgC) { |
| 256 | assert(0 && "Cannot generate message send to super for Mac runtime."); |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | /// Generate code for a message send expression. |
| 261 | llvm::Value *CGObjCMac::GenerateMessageSend(llvm::IRBuilder<> &Builder, |
| 262 | const llvm::Type *ReturnTy, |
| 263 | llvm::Value *Sender, |
| 264 | llvm::Value *Receiver, |
| 265 | Selector Sel, |
| 266 | llvm::Value** ArgV, |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 267 | unsigned ArgC) { |
| 268 | if (!Sender) { |
| 269 | llvm::Function *F = ObjCTypes.getMessageSendFn(); |
| 270 | llvm::Value **Args = new llvm::Value*[ArgC+2]; |
| 271 | Args[0] = Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy, "tmp"); |
| 272 | Args[1] = EmitSelector(Builder, Sel); |
| 273 | std::copy(ArgV, ArgV+ArgC, Args+2); |
| 274 | llvm::CallInst *CI = Builder.CreateCall(F, Args, Args+ArgC+2, "tmp"); |
| 275 | delete[] Args; |
| 276 | return Builder.CreateBitCast(CI, ReturnTy, "tmp"); |
| 277 | } else { |
| 278 | assert(0 && "cannot generate message sends with sender"); |
| 279 | return 0; |
| 280 | } |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | llvm::Value *CGObjCMac::GenerateProtocolRef(llvm::IRBuilder<> &Builder, |
| 284 | const char *ProtocolName) { |
| 285 | assert(0 && "Cannot get protocol reference on Mac runtime."); |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | void CGObjCMac::GenerateProtocol(const char *ProtocolName, |
| 290 | const llvm::SmallVectorImpl<std::string> &Protocols, |
| 291 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames, |
| 292 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 293 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames, |
| 294 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes) { |
| 295 | assert(0 && "Cannot generate protocol for Mac runtime."); |
| 296 | } |
| 297 | |
| 298 | void CGObjCMac::GenerateCategory( |
| 299 | const char *ClassName, |
| 300 | const char *CategoryName, |
| 301 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 302 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 303 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 304 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 305 | const llvm::SmallVectorImpl<std::string> &Protocols) { |
| 306 | assert(0 && "Cannot generate category for Mac runtime."); |
| 307 | } |
| 308 | |
| 309 | void CGObjCMac::GenerateClass( |
| 310 | const char *ClassName, |
| 311 | const char *SuperClassName, |
| 312 | const int instanceSize, |
| 313 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, |
| 314 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, |
| 315 | const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets, |
| 316 | const llvm::SmallVectorImpl<Selector> &InstanceMethodSels, |
| 317 | const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes, |
| 318 | const llvm::SmallVectorImpl<Selector> &ClassMethodSels, |
| 319 | const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes, |
| 320 | const llvm::SmallVectorImpl<std::string> &Protocols) { |
| 321 | assert(0 && "Cannot generate class for Mac runtime."); |
| 322 | } |
| 323 | |
| 324 | llvm::Function *CGObjCMac::ModuleInitFunction() { |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 325 | // Abuse this interface function as a place to finalize. |
| 326 | FinishModule(); |
| 327 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 328 | return NULL; |
| 329 | } |
| 330 | |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 331 | llvm::Function *CGObjCMac::MethodPreamble(const std::string &ClassName, |
| 332 | const std::string &CategoryName, |
| 333 | const std::string &MethodName, |
| 334 | const llvm::Type *ReturnTy, |
| 335 | const llvm::Type *SelfTy, |
| 336 | const llvm::Type **ArgTy, |
| 337 | unsigned ArgC, |
| 338 | bool isClassMethod, |
| 339 | bool isVarArg) { |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 340 | assert(0 && "Cannot generate method preamble for Mac runtime."); |
| 341 | return 0; |
| 342 | } |
| 343 | |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 344 | /* *** Private Interface *** */ |
| 345 | |
| 346 | /// EmitImageInfo - Emit the image info marker used to encode some module |
| 347 | /// level information. |
| 348 | /// |
| 349 | /// See: <rdr://4810609&4810587&4810587> |
| 350 | /// struct IMAGE_INFO { |
| 351 | /// unsigned version; |
| 352 | /// unsigned flags; |
| 353 | /// }; |
| 354 | enum ImageInfoFlags { |
| 355 | eImageInfo_FixAndContinue = (1 << 0), // FIXME: Not sure what this implies |
| 356 | eImageInfo_GarbageCollected = (1 << 1), |
| 357 | eImageInfo_GCOnly = (1 << 2) |
| 358 | }; |
| 359 | |
| 360 | void CGObjCMac::EmitImageInfo() { |
| 361 | unsigned version = 0; // Version is unused? |
| 362 | unsigned flags = 0; |
| 363 | |
| 364 | // FIXME: Fix and continue? |
| 365 | if (CGM.getLangOptions().getGCMode() != LangOptions::NonGC) |
| 366 | flags |= eImageInfo_GarbageCollected; |
| 367 | if (CGM.getLangOptions().getGCMode() == LangOptions::GCOnly) |
| 368 | flags |= eImageInfo_GCOnly; |
| 369 | |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 370 | // Emitted as int[2]; |
| 371 | llvm::Constant *values[2] = { |
| 372 | llvm::ConstantInt::get(llvm::Type::Int32Ty, version), |
| 373 | llvm::ConstantInt::get(llvm::Type::Int32Ty, flags) |
| 374 | }; |
| 375 | llvm::ArrayType *AT = llvm::ArrayType::get(llvm::Type::Int32Ty, 2); |
| 376 | llvm::GlobalValue *GV = |
| 377 | new llvm::GlobalVariable(AT, true, |
| 378 | llvm::GlobalValue::InternalLinkage, |
| 379 | llvm::ConstantArray::get(AT, values, 2), |
| 380 | "\01L_OBJC_IMAGE_INFO", |
| 381 | &CGM.getModule()); |
| 382 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 383 | if (ObjCABI == 1) { |
| 384 | GV->setSection("__OBJC, __image_info,regular"); |
| 385 | } else { |
| 386 | GV->setSection("__DATA, __objc_imageinfo, regular, no_dead_strip"); |
| 387 | } |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 388 | |
| 389 | UsedGlobals.push_back(GV); |
| 390 | } |
| 391 | |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 392 | llvm::Value *CGObjCMac::EmitSelector(llvm::IRBuilder<> &Builder, Selector Sel) { |
| 393 | llvm::GlobalVariable *&Entry = SelectorReferences[Sel]; |
| 394 | |
| 395 | if (!Entry) { |
| 396 | llvm::Constant *Casted = |
| 397 | llvm::ConstantExpr::getBitCast(GetMethodVarName(Sel), |
| 398 | ObjCTypes.SelectorPtrTy); |
| 399 | Entry = |
| 400 | new llvm::GlobalVariable(ObjCTypes.SelectorPtrTy, false, |
| 401 | llvm::GlobalValue::InternalLinkage, |
| 402 | Casted, "\01L_OBJC_SELECTOR_REFERENCES_", |
| 403 | &CGM.getModule()); |
| 404 | Entry->setSection("__OBJC,__message_refs,literal_pointers,no_dead_strip"); |
| 405 | UsedGlobals.push_back(Entry); |
| 406 | } |
| 407 | |
| 408 | return Builder.CreateLoad(Entry, false, "tmp"); |
| 409 | } |
| 410 | |
| 411 | llvm::Constant *CGObjCMac::GetMethodVarName(Selector Sel) { |
| 412 | llvm::GlobalVariable *&Entry = MethodVarNames[Sel]; |
| 413 | |
| 414 | if (!Entry) { |
| 415 | llvm::Constant *C = llvm::ConstantArray::get(Sel.getName()); |
| 416 | Entry = |
| 417 | new llvm::GlobalVariable(C->getType(), true, |
| 418 | llvm::GlobalValue::InternalLinkage, |
| 419 | C, "\01L_OBJC_METH_VAR_NAME_", |
| 420 | &CGM.getModule()); |
| 421 | Entry->setSection("__TEXT,__cstring,cstring_literals"); |
| 422 | UsedGlobals.push_back(Entry); |
| 423 | } |
| 424 | |
| 425 | return Entry; |
| 426 | } |
| 427 | |
Daniel Dunbar | f77ac86 | 2008-08-11 21:35:06 +0000 | [diff] [blame] | 428 | void CGObjCMac::FinishModule() { |
| 429 | std::vector<llvm::Constant*> Used; |
| 430 | |
| 431 | llvm::Type *I8Ptr = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); |
| 432 | for (std::vector<llvm::GlobalValue*>::iterator i = UsedGlobals.begin(), |
| 433 | e = UsedGlobals.end(); i != e; ++i) { |
| 434 | Used.push_back(llvm::ConstantExpr::getBitCast(*i, I8Ptr)); |
| 435 | } |
| 436 | |
| 437 | llvm::ArrayType *AT = llvm::ArrayType::get(I8Ptr, Used.size()); |
| 438 | llvm::GlobalValue *GV = |
| 439 | new llvm::GlobalVariable(AT, false, |
| 440 | llvm::GlobalValue::AppendingLinkage, |
| 441 | llvm::ConstantArray::get(AT, Used), |
| 442 | "llvm.used", |
| 443 | &CGM.getModule()); |
| 444 | |
| 445 | GV->setSection("llvm.metadata"); |
| 446 | } |
| 447 | |
| 448 | /* *** */ |
| 449 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 450 | ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm) |
| 451 | : CGM(cgm), |
| 452 | CFStringType(0), |
| 453 | CFConstantStringClassReference(0), |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 454 | MessageSendFn(0), |
| 455 | LongTy(CGM.getTypes().ConvertType(CGM.getContext().LongTy)), |
| 456 | // FIXME: We want the types from the front-end. |
| 457 | ObjectTy(llvm::OpaqueType::get()), |
| 458 | ObjectPtrTy(llvm::PointerType::getUnqual(ObjectTy)), |
| 459 | SelectorTy(llvm::OpaqueType::get()), |
| 460 | SelectorPtrTy(llvm::PointerType::getUnqual(SelectorTy)) |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 461 | { |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 462 | CGM.getModule().addTypeName("struct.__objc_object", ObjectTy); |
| 463 | CGM.getModule().addTypeName("struct.__objc_selector", SelectorTy); |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | ObjCTypesHelper::~ObjCTypesHelper() { |
| 467 | } |
| 468 | |
| 469 | const llvm::StructType *ObjCTypesHelper::getCFStringType() { |
| 470 | if (!CFStringType) { |
| 471 | CFStringType = |
| 472 | llvm::StructType::get(llvm::PointerType::getUnqual(llvm::Type::Int32Ty), |
| 473 | llvm::Type::Int32Ty, |
| 474 | llvm::PointerType::getUnqual(llvm::Type::Int8Ty), |
| 475 | LongTy, |
| 476 | NULL); |
| 477 | |
| 478 | CGM.getModule().addTypeName("struct.__builtin_CFString", CFStringType); |
| 479 | } |
| 480 | |
| 481 | return CFStringType; |
| 482 | } |
| 483 | |
| 484 | llvm::Constant *ObjCTypesHelper::getCFConstantStringClassReference() { |
| 485 | if (!CFConstantStringClassReference) { |
| 486 | llvm::GlobalValue *GV = |
| 487 | new llvm::GlobalVariable(llvm::ArrayType::get(llvm::Type::Int32Ty, 0), |
| 488 | false, |
| 489 | llvm::GlobalValue::ExternalLinkage, |
| 490 | 0, "__CFConstantStringClassReference", |
| 491 | &CGM.getModule()); |
| 492 | |
| 493 | // Decay to pointer. |
| 494 | CFConstantStringClassReference = getConstantGEP(GV, 0, 0); |
| 495 | } |
| 496 | |
| 497 | return CFConstantStringClassReference; |
| 498 | } |
| 499 | |
Daniel Dunbar | 259d93d | 2008-08-12 03:39:23 +0000 | [diff] [blame^] | 500 | llvm::Function *ObjCTypesHelper::getMessageSendFn() { |
| 501 | if (!MessageSendFn) { |
| 502 | std::vector<const llvm::Type*> Params; |
| 503 | Params.push_back(ObjectPtrTy); |
| 504 | Params.push_back(SelectorPtrTy); |
| 505 | MessageSendFn = llvm::Function::Create(llvm::FunctionType::get(ObjectPtrTy, |
| 506 | Params, |
| 507 | true), |
| 508 | llvm::Function::ExternalLinkage, |
| 509 | "objc_msgSend", |
| 510 | &CGM.getModule()); |
| 511 | } |
| 512 | |
| 513 | return MessageSendFn; |
| 514 | } |
| 515 | |
Daniel Dunbar | bbce49b | 2008-08-12 00:12:39 +0000 | [diff] [blame] | 516 | /* *** */ |
| 517 | |
Daniel Dunbar | c17a4d3 | 2008-08-11 02:45:11 +0000 | [diff] [blame] | 518 | CodeGen::CGObjCRuntime *CodeGen::CreateMacObjCRuntime(CodeGen::CodeGenModule &CGM){ |
| 519 | return new CGObjCMac(CGM); |
| 520 | } |