CGObjCGNU.cpp revision a2120039ed08a5d5d6096e2560fd32c6128e951a
14afac18fd4cae1b93907d7db03c5fdb7f2f66d64Misha Brukman//===------- CGObjCGNU.cpp - Emit LLVM Code from ASTs for a Module --------===// 2edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 3b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// The LLVM Compiler Infrastructure 4b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 7edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 8b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell//===----------------------------------------------------------------------===// 9edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 10bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// This provides Objective-C code generation targeting the GNU runtime. The 11bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// class in this file generates structures used by the GNU Objective-C runtime 12bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// library. These structures are defined in objc/objc.h and objc/objc-api.h in 13bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// the GNU runtime distribution. 14bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// 153785fad56eb90284d4e930d40e9306391630deb1Chris Lattner//===----------------------------------------------------------------------===// 160d5bd59553375dc85ac04c81ef48ef74c9e7193eJeffrey Yasskin 1713a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo#include "CGObjCRuntime.h" 18d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "CodeGenModule.h" 19d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "CodeGenFunction.h" 20fd13129bdf7324b2e8181a653897269aaaecc4e8Chris Lattner#include "CGCleanup.h" 210b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth 220b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "clang/AST/ASTContext.h" 230b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "clang/AST/Decl.h" 240b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "clang/AST/DeclObjC.h" 250b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "clang/AST/RecordLayout.h" 26551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "clang/AST/StmtObjC.h" 27d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "clang/Basic/SourceManager.h" 2831e2466f159a887fed9139067a676f65adf2a8c3Torok Edwin#include "clang/Basic/FileManager.h" 29d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth 30e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner#include "llvm/Intrinsics.h" 31d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/Module.h" 320d5bd59553375dc85ac04c81ef48ef74c9e7193eJeffrey Yasskin#include "llvm/LLVMContext.h" 337d696d80409aad20bb5da0fc4eccab941dd371d4Torok Edwin#include "llvm/ADT/SmallVector.h" 34c5b28580a94e247300e5d3ccf532e153f2ae6f12Dylan Noblesmith#include "llvm/ADT/StringMap.h" 35ae9f3a3b7c915f725aef5a7250e88eaeddda03c6Anton Korobeynikov#include "llvm/Support/CallSite.h" 36ae9f3a3b7c915f725aef5a7250e88eaeddda03c6Anton Korobeynikov#include "llvm/Support/Compiler.h" 37c2ee9b9c7a6517f959aea31fa2c61631fe2f2903Chris Lattner#include "llvm/Target/TargetData.h" 38bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 3936343735cb23680c8f8675deafbbf825d46fd868Chris Lattner#include <stdarg.h> 4036343735cb23680c8f8675deafbbf825d46fd868Chris Lattner 41bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 424688261c20735f5ead2f08695acdeb727db31894Jeffrey Yasskinusing namespace clang; 434688261c20735f5ead2f08695acdeb727db31894Jeffrey Yasskinusing namespace CodeGen; 444688261c20735f5ead2f08695acdeb727db31894Jeffrey Yasskinusing llvm::dyn_cast; 454688261c20735f5ead2f08695acdeb727db31894Jeffrey Yasskin 464688261c20735f5ead2f08695acdeb727db31894Jeffrey Yasskin 47c5b28580a94e247300e5d3ccf532e153f2ae6f12Dylan Noblesmithnamespace { 486d135972bf4e7fdc4de6b0538d6a3b91a06e3a5dDaniel Dunbar/// Class that lazily initialises the runtime function. Avoids inserting the 496d135972bf4e7fdc4de6b0538d6a3b91a06e3a5dDaniel Dunbar/// types and the function declaration into a module if they're not used, and 506d135972bf4e7fdc4de6b0538d6a3b91a06e3a5dDaniel Dunbar/// avoids constructing the type more than once if it's used more than once. 5113a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizloclass LazyRuntimeFunction { 526d135972bf4e7fdc4de6b0538d6a3b91a06e3a5dDaniel Dunbar CodeGenModule *CGM; 53c5b28580a94e247300e5d3ccf532e153f2ae6f12Dylan Noblesmith std::vector<const llvm::Type*> ArgTys; 54f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin const char *FunctionName; 554b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner llvm::Function *Function; 562fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner public: 57f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// Constructor leaves this class uninitialized, because it is intended to 584c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// be used as a field in another class and not all of the types that are 59b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands /// used as arguments will necessarily be available at construction time. 6048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar LazyRuntimeFunction() : CGM(0), FunctionName(0), Function(0) {} 61b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands 62dc85724f703bddf6988b6b3f20203beab775f32bJeffrey Yasskin /// Initialises the lazy function with the name, return type, and the types 63446531e7bb4355117b070493ca8e81e4b123ef18Evan Cheng /// of the arguments. 641b088f33107798c544e0a872df4cc1921581eb66Evan Cheng END_WITH_NULL 65f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin void init(CodeGenModule *Mod, const char *name, 66f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin const llvm::Type *RetTy, ...) { 6719684164a7b695b9dc22d879675e8d2b286ef7e5Misha Brukman CGM =Mod; 6819684164a7b695b9dc22d879675e8d2b286ef7e5Misha Brukman FunctionName = name; 698e539488816c9e52bde0af475f72cd3e6407d558Brian Gaeke Function = 0; 70d4c0e62413ac4c81467ce59025c81210ea431752Reid Spencer ArgTys.clear(); 71fe854034677f59baca1e38075e71f6efca247a03Chris Lattner va_list Args; 72fe854034677f59baca1e38075e71f6efca247a03Chris Lattner va_start(Args, RetTy); 738e539488816c9e52bde0af475f72cd3e6407d558Brian Gaeke while (const llvm::Type *ArgTy = va_arg(Args, const llvm::Type*)) 748e539488816c9e52bde0af475f72cd3e6407d558Brian Gaeke ArgTys.push_back(ArgTy); 75b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands va_end(Args); 76b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands // Push the return type on at the end so we can pop it off easily 77515c67ee77f8d9c417efc0fe04615d269bfb70e4Eric Christopher ArgTys.push_back(RetTy); 78515c67ee77f8d9c417efc0fe04615d269bfb70e4Eric Christopher } 79515c67ee77f8d9c417efc0fe04615d269bfb70e4Eric Christopher /// Overloaded cast operator, allows the class to be implicitly cast to an 80515c67ee77f8d9c417efc0fe04615d269bfb70e4Eric Christopher /// LLVM constant. 81b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands operator llvm::Function*() { 82b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands if (!Function) { 83b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands if (0 == FunctionName) return 0; 84b35fd448cea32da671ecd3ecaad3cc637598c6e0Duncan Sands // We put the return type on the end of the vector, so pop it back off 8547b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin const llvm::Type *RetTy = ArgTys.back(); 8648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar ArgTys.pop_back(); 8748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::FunctionType *FTy = llvm::FunctionType::get(RetTy, ArgTys, false); 8847b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin Function = 8947b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin cast<llvm::Function>(CGM->CreateRuntimeFunction(FTy, FunctionName)); 9047b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin // We won't need to use the types again, so we may as well clean up the 9147b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin // vector now 9247b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin ArgTys.resize(0); 9348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar } 9448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar return Function; 953574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow } 96db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner}; 9747b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin 9847b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin 993574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow/// GNU Objective-C runtime code generation. This class implements the parts of 10047b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin/// Objective-C support that are specific to the GNU family of runtimes (GCC and 10147b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin/// GNUstep). 10247b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskinclass CGObjCGNU : public CGObjCRuntime { 10347b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskinprotected: 10447b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// The module that is using this class 10547b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin CodeGenModule &CGM; 10647b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// The LLVM module into which output is inserted 10747b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin llvm::Module &TheModule; 10847b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// strut objc_super. Used for sending messages to super. This structure 10947b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// contains the receiver (object) and the expected class. 11047b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin const llvm::StructType *ObjCSuperTy; 11147b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// struct objc_super*. The type of the argument to the superclass message 11247b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// lookup functions. 11347b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin const llvm::PointerType *PtrToObjCSuperTy; 11447b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// LLVM type for selectors. Opaque pointer (i8*) unless a header declaring 11547b7112418a8c6ca23039ad5239cbc16091911a0Jeffrey Yasskin /// SEL is included in a header somewhere, in which case it will be whatever 11648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// type is declared in that header, most likely {i8*, i8*}. 1173574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow const llvm::PointerType *SelectorTy; 11846fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray /// LLVM i8 type. Cached here to avoid repeatedly getting it in all of the 11946fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray /// places where it's used 120f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin const llvm::IntegerType *Int8Ty; 1216227d5c690504c7ada5780c00a635b282c46e275Craig Topper /// Pointer to i8 - LLVM type of char*, for all of the places where the 12273d0e211a39650fc7562e0f15ed21440dde2243aDevang Patel /// runtime needs to deal with C strings. 123f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin const llvm::PointerType *PtrToInt8Ty; 124f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// Instance Method Pointer type. This is a pointer to a function that takes, 12573d0e211a39650fc7562e0f15ed21440dde2243aDevang Patel /// at a minimum, an object and a selector, and is the generic type for 126f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// Objective-C methods. Due to differences between variadic / non-variadic 127f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// calling conventions, it must always be cast to the correct type before 12860789e419e04c260e36af9a1add5ad316313e490Nate Begeman /// actually being used. 12960789e419e04c260e36af9a1add5ad316313e490Nate Begeman const llvm::PointerType *IMPTy; 130f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// Type of an untyped Objective-C object. Clang treats id as a built-in type 13160789e419e04c260e36af9a1add5ad316313e490Nate Begeman /// when compiling Objective-C code, so this may be an opaque pointer (i8*), 13260789e419e04c260e36af9a1add5ad316313e490Nate Begeman /// but if the runtime header declaring it is included then it may be a 133fe854034677f59baca1e38075e71f6efca247a03Chris Lattner /// pointer to a structure. 134fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::PointerType *IdTy; 135f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// Pointer to a pointer to an Objective-C object. Used in the new ABI 136fe854034677f59baca1e38075e71f6efca247a03Chris Lattner /// message lookup function and some GC-related functions. 137fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::PointerType *PtrToIdTy; 138fe854034677f59baca1e38075e71f6efca247a03Chris Lattner /// The clang type of id. Used when using the clang CGCall infrastructure to 139fe854034677f59baca1e38075e71f6efca247a03Chris Lattner /// call Objective-C methods. 140fe854034677f59baca1e38075e71f6efca247a03Chris Lattner CanQualType ASTIdTy; 141fe854034677f59baca1e38075e71f6efca247a03Chris Lattner /// LLVM type for C int type. 14248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const llvm::IntegerType *IntTy; 14348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// LLVM type for an opaque pointer. This is identical to PtrToInt8Ty, but is 14423e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin /// used in the code to document the difference between i8* meaning a pointer 145c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// to a C string and i8* meaning a pointer to some opaque type. 14648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const llvm::PointerType *PtrTy; 14748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// LLVM type for C long type. The runtime uses this in a lot of places where 14848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// it should be using intptr_t, but we can't fix this without breaking 149c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// compatibility with GCC... 150c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin const llvm::IntegerType *LongTy; 151c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// LLVM type for C size_t. Used in various runtime data structures. 152c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin const llvm::IntegerType *SizeTy; 153c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// LLVM type for C ptrdiff_t. Mainly used in property accessor functions. 154c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin const llvm::IntegerType *PtrDiffTy; 155c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// LLVM type for C int*. Used for GCC-ABI-compatible non-fragile instance 156c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// variables. 157c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin const llvm::PointerType *PtrToIntTy; 158c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin /// LLVM type for Objective-C BOOL type. 159c89d27a440370455336202b2a8f25eb9c73e67bcJeffrey Yasskin const llvm::Type *BoolTy; 160e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// Metadata kind used to tie method lookups to message sends. The GNUstep 161e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// runtime provides some LLVM passes that can use this to do things like 162bc4707a2554ac04ba006bf70035e7bc7270236a9Evan Cheng /// automatic IMP caching and speculative inlining. 16348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar unsigned msgSendMDKind; 16493b67e40de356569493c285b86b138a3f11b5035Daniel Dunbar /// Helper function that generates a constant string and returns a pointer to 16523e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin /// the start of the string. The result of this function can be used anywhere 166e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// where the C code specifies const char*. 167e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::Constant *MakeConstantString(const std::string &Str, 16848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const std::string &Name="") { 16948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *ConstStr = CGM.GetAddrOfConstantCString(Str, Name.c_str()); 1704c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin return llvm::ConstantExpr::getGetElementPtr(ConstStr, Zeros, 2); 1710d5bd59553375dc85ac04c81ef48ef74c9e7193eJeffrey Yasskin } 1724c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// Emits a linkonce_odr string, whose name is the prefix followed by the 173e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// string value. This allows the linker to combine the strings between 174e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// different modules. Used for EH typeinfo names, selector strings, and a 175e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// few other things. 176e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::Constant *ExportUniqueString(const std::string &Str, 177e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner const std::string prefix) { 178e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner std::string name = prefix + Str; 179e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::Constant *ConstStr = TheModule.getGlobalVariable(name); 18048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar if (!ConstStr) { 1814c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin llvm::Constant *value = llvm::ConstantArray::get(VMContext, Str, true); 1824c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin ConstStr = new llvm::GlobalVariable(TheModule, value->getType(), true, 183e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::GlobalValue::LinkOnceODRLinkage, value, prefix + Str); 184e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner } 185f049e07eb8930214941c72f8e4409df394de1567Nate Begeman return llvm::ConstantExpr::getGetElementPtr(ConstStr, Zeros, 2); 186f049e07eb8930214941c72f8e4409df394de1567Nate Begeman } 18748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Generates a global structure, initialized by the elements in the vector. 18848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// The element types must match the types of the structure elements in the 1894c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// first argument. 19048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::GlobalVariable *MakeGlobal(const llvm::StructType *Ty, 19148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar std::vector<llvm::Constant*> &V, 1924c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin llvm::StringRef Name="", 193f049e07eb8930214941c72f8e4409df394de1567Nate Begeman llvm::GlobalValue::LinkageTypes linkage 194f049e07eb8930214941c72f8e4409df394de1567Nate Begeman =llvm::GlobalValue::InternalLinkage) { 195f4cc3096fd893cdef5b5c2664ebff8c13a07ad51Chris Lattner llvm::Constant *C = llvm::ConstantStruct::get(Ty, V); 196e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner return new llvm::GlobalVariable(TheModule, Ty, false, 197f4cc3096fd893cdef5b5c2664ebff8c13a07ad51Chris Lattner linkage, C, Name); 19823e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin } 1994c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// Generates a global array. The vector must contain the same number of 200f4cc3096fd893cdef5b5c2664ebff8c13a07ad51Chris Lattner /// elements that the array type declares, of the type specified as the array 201e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// element type. 20248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::GlobalVariable *MakeGlobal(const llvm::ArrayType *Ty, 2034c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin std::vector<llvm::Constant*> &V, 20448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::StringRef Name="", 20523e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin llvm::GlobalValue::LinkageTypes linkage 206f4cc3096fd893cdef5b5c2664ebff8c13a07ad51Chris Lattner =llvm::GlobalValue::InternalLinkage) { 207f4cc3096fd893cdef5b5c2664ebff8c13a07ad51Chris Lattner llvm::Constant *C = llvm::ConstantArray::get(Ty, V); 2084c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin return new llvm::GlobalVariable(TheModule, Ty, false, 2094c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin linkage, C, Name); 210e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner } 21148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Generates a global array, inferring the array type from the specified 21248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// element type and the size of the initialiser. 2134c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin llvm::GlobalVariable *MakeGlobalArray(const llvm::Type *Ty, 2140d5bd59553375dc85ac04c81ef48ef74c9e7193eJeffrey Yasskin std::vector<llvm::Constant*> &V, 2154c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin llvm::StringRef Name="", 216e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::GlobalValue::LinkageTypes linkage 217e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner =llvm::GlobalValue::InternalLinkage) { 218e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::ArrayType *ArrayTy = llvm::ArrayType::get(Ty, V.size()); 219f4cc3096fd893cdef5b5c2664ebff8c13a07ad51Chris Lattner return MakeGlobal(ArrayTy, V, Name, linkage); 220e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner } 221e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// Ensures that the value has the required type, by inserting a bitcast if 222e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// required. This function lets us avoid inserting bitcasts that are 223e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner /// redundant. 22448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Value* EnforceType(CGBuilderTy B, llvm::Value *V, const llvm::Type *Ty){ 22523e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin if (V->getType() == Ty) return V; 22623e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin return B.CreateBitCast(V, Ty); 2274c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin } 228e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner // Some zeros used for GEPs in lots of places. 229e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner llvm::Constant *Zeros[2]; 23055d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattner /// Null pointer value. Mainly used as a terminator in various arrays. 231ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer llvm::Constant *NULLPtr; 232ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer /// LLVM context. 23355d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattner llvm::LLVMContext &VMContext; 2344c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskinprivate: 23523e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin /// Placeholder for the class. Lots of things refer to the class before we've 2364c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// actually emitted it. We use this alias as a placeholder, and then replace 2374c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// it with a pointer to the class structure before finally emitting the 238ab19da4bc087e79550ebe448d9edd4d8ed248388Daniel Dunbar /// module. 239ab19da4bc087e79550ebe448d9edd4d8ed248388Daniel Dunbar llvm::GlobalAlias *ClassPtrAlias; 24055d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattner /// Placeholder for the metaclass. Lots of things refer to the class before 24155d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattner /// we've / actually emitted it. We use this alias as a placeholder, and then 2420d5bd59553375dc85ac04c81ef48ef74c9e7193eJeffrey Yasskin /// replace / it with a pointer to the metaclass structure before finally 2434c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin /// emitting the / module. 2444c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin llvm::GlobalAlias *MetaClassPtrAlias; 24555d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattner /// All of the classes that have been generated for this compilation units. 24687f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner std::vector<llvm::Constant*> Classes; 247b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// All of the categories that have been generated for this compilation units. 248b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin std::vector<llvm::Constant*> Categories; 249b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// All of the Objective-C constant strings that have been generated for this 250b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// compilation units. 251b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin std::vector<llvm::Constant*> ConstantStrings; 252b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// Map from string values to Objective-C constant strings in the output. 253b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// Used to prevent emitting Objective-C strings more than once. This should 254b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// not be required at all - CodeGenModule should manage this list. 255b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin llvm::StringMap<llvm::Constant*> ObjCStrings; 256b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// All of the protocols that have been declared. 257b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin llvm::StringMap<llvm::Constant*> ExistingProtocols; 258b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// For each variant of a selector, we store the type encoding and a 259b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// placeholder value. For an untyped selector, the type will be the empty 260b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// string. Selector references are all done via the module's selector table, 261b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// so we create an alias as a placeholder and then replace it with the real 262b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// value later. 263b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin typedef std::pair<std::string, llvm::GlobalAlias*> TypedSelector; 264b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// Type of the selector map. This is roughly equivalent to the structure 265b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// used in the GNUstep runtime, which maintains a list of all of the valid 266b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// types for a selector in a table. 267b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin typedef llvm::DenseMap<Selector, llvm::SmallVector<TypedSelector, 2> > 268b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin SelectorMap; 269b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// A map from selectors to selector types. This allows us to emit all 270b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// selectors of the same name and type together. 271426c2bf5cdd2173e4a33aea8cb92cf684a724f4bChandler Carruth SelectorMap SelectorTable; 272b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin 27387f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Selectors related to memory management. When compiling in GC mode, we 274b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// omit these. 275db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Selector RetainSel, ReleaseSel, AutoreleaseSel; 27687f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Runtime functions used for memory management in GC mode. Note that clang 27787f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// supports code generation for calling these functions, but neither GNU 27887f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// runtime actually supports this API properly yet. 27987f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner LazyRuntimeFunction IvarAssignFn, StrongCastAssignFn, MemMoveFn, WeakReadFn, 280b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin WeakAssignFn, GlobalAssignFn; 281ae7c59a01286a3babbc6245dcb1049c7bcde2573David Greene 282edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukmanprotected: 28387f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Function used for throwing Objective-C exceptions. 28487f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner LazyRuntimeFunction ExceptionThrowFn; 285edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman /// Function used for rethrowing exceptions, used at the end of @finally or 286b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// @synchronize blocks. 287b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin LazyRuntimeFunction ExceptionReThrowFn; 28887f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Function called when entering a catch function. This is required for 28987f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// differentiating Objective-C exceptions and foreign exceptions. 29087f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner LazyRuntimeFunction EnterCatchFn; 29187f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Function called when exiting from a catch block. Used to do exception 29287f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// cleanup. 293b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin LazyRuntimeFunction ExitCatchFn; 29487f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Function called when entering an @synchronize block. Acquires the lock. 295b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin LazyRuntimeFunction SyncEnterFn; 29687f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Function called when exiting an @synchronize block. Releases the lock. 29787f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner LazyRuntimeFunction SyncExitFn; 298fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner 299fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattnerprivate: 3009ca6cdaee91fddcd3ea57dedcd624c14c7a40f65Chris Lattner 30148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Function called if fast enumeration detects that the collection is 30248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// modified during the update. 30348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar LazyRuntimeFunction EnumerationMutationFn; 30448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Function for implementing synthesized property getters that return an 30548dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// object. 30648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar LazyRuntimeFunction GetPropertyFn; 30748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Function for implementing synthesized property setters that return an 30848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// object. 309a040d47c74341327997a50e88bb8ad4ceda6989fNick Lewycky LazyRuntimeFunction SetPropertyFn; 31048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Function used for non-object declared property getters. 3111ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner LazyRuntimeFunction GetStructPropertyFn; 3121ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner /// Function used for non-object declared property setters. 3135ea5c61589e62a1068746ddcc52c6aa39ec0f8b0Nick Lewycky LazyRuntimeFunction SetStructPropertyFn; 31448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 3151ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner /// The version of the runtime that this class targets. Must match the 3161ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner /// version in the runtime. 31748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar int RuntimeVersion; 31848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// The version of the protocol class. Used to differentiate between ObjC1 31948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// and ObjC2 protocols. Objective-C 1 protocols can not contain optional 3205ea5c61589e62a1068746ddcc52c6aa39ec0f8b0Nick Lewycky /// components and can not contain declared properties. We always emit 32148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Objective-C 2 property structures, but we have to pretend that they're 32248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Objective-C 1 property structures when targeting the GCC runtime or it 32348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// will abort. 32448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const int ProtocolVersion; 32548dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbarprivate: 32648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Generates an instance variable list structure. This is a structure 32748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// containing a size and an array of structures containing instance variable 32848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// metadata. This is used purely for introspection in the fragile ABI. In 32948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// the non-fragile ABI, it's used for instance variable fixup. 33048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *GenerateIvarList( 33148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, 33248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, 33348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets); 33448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Generates a method list structure. This is a structure containing a size 33518314dc741ab7dc4db02b199af77f43bd8551fd2Evan Cheng /// and an array of structures containing method metadata. 33618314dc741ab7dc4db02b199af77f43bd8551fd2Evan Cheng /// 33718314dc741ab7dc4db02b199af77f43bd8551fd2Evan Cheng /// This structure is used by both classes and categories, and contains a next 33818314dc741ab7dc4db02b199af77f43bd8551fd2Evan Cheng /// pointer allowing them to be chained together in a linked list. 33948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *GenerateMethodList(const llvm::StringRef &ClassName, 34048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const llvm::StringRef &CategoryName, 3419ca6cdaee91fddcd3ea57dedcd624c14c7a40f65Chris Lattner const llvm::SmallVectorImpl<Selector> &MethodSels, 3429ca6cdaee91fddcd3ea57dedcd624c14c7a40f65Chris Lattner const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes, 343b6e3d6ce709e9ed57df055b026e55d19e50df772Dan Gohman bool isClassMethodList); 3448a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands /// Emits an empty protocol. This is used for @protocol() where no protocol 3458a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands /// is found. The runtime will (hopefully) fix up the pointer to refer to the 346426c2bf5cdd2173e4a33aea8cb92cf684a724f4bChandler Carruth /// real protocol. 3478a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Constant *GenerateEmptyProtocol(const std::string &ProtocolName); 3488a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands /// Generates a list of property metadata structures. This follows the same 3498a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands /// pattern as method and instance variable metadata lists. 3508a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Constant *GeneratePropertyList(const ObjCImplementationDecl *OID, 3518a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::SmallVectorImpl<Selector> &InstanceMethodSels, 352b6e3d6ce709e9ed57df055b026e55d19e50df772Dan Gohman llvm::SmallVectorImpl<llvm::Constant*> &InstanceMethodTypes); 3538a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands /// Generates a list of referenced protocols. Classes, categories, and 35487f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// protocols all use this structure. 35587f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner llvm::Constant *GenerateProtocolList( 35687f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner const llvm::SmallVectorImpl<std::string> &Protocols); 35787f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// To ensure that all protocols are seen by the runtime, we add a category on 35887f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// a class defined in the runtime, declaring no methods, but adopting the 3598fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer /// protocols. This is a horribly ugly hack, but it allows us to collect all 360499d8f0c3b212819515cdbcb98146fff6f9d877bAnton Korobeynikov /// of the protocols without changing the ABI. 361499d8f0c3b212819515cdbcb98146fff6f9d877bAnton Korobeynikov void GenerateProtocolHolderCategory(void); 362f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner /// Generates a class structure. 363db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner llvm::Constant *GenerateClassStructure( 364db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner llvm::Constant *MetaClass, 36548dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *SuperClass, 36648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar unsigned info, 36748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const char *Name, 36848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *Version, 36948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *InstanceSize, 37048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *IVars, 37148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *Methods, 37248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *Protocols, 37348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *IvarOffsets, 37448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *Properties, 37548dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar bool isMeta=false); 37648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// Generates a method list. This is used by protocols to define the required 37748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// and optional methods. 37848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *GenerateProtocolMethodList( 379b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin const llvm::SmallVectorImpl<llvm::Constant *> &MethodNames, 380b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes); 381f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner /// Returns a selector with the specified type encoding. An empty string is 382f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner /// used to return an untyped selector (with the types field set to NULL). 383f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel, 3841d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson const std::string &TypeEncoding, bool lval); 385b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// Returns the variable used to store the offset of an instance variable. 3868a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::GlobalVariable *ObjCIvarOffsetVariable(const ObjCInterfaceDecl *ID, 387f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner const ObjCIvarDecl *Ivar); 388f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner /// Emits a reference to a class. This allows the linker to object if there 389f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner /// is no class of the matching name. 390f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner void EmitClassRef(const std::string &className); 391f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattnerprotected: 3921d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson /// Looks up the method for sending a message to the specified object. This 393b19383818bcaf65509f4050c81f75c8ee0624f8cJeffrey Yasskin /// mechanism differs between the GCC and GNU runtimes, so this method must be 394f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner /// overridden in subclasses. 395f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, 396f24d09933c0fa2dae141426f2c38c8925693c73fChris Lattner llvm::Value *&Receiver, 39748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Value *cmd, 3988fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer llvm::MDNode *node) = 0; 39987f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// Looks up the method for sending a message to a superclass. This mechanism 40087f03108f282a9b5f172f91679bd89ddbb5a65beChris Lattner /// differs between the GCC and GNU runtimes, so this method must be 401f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin /// overridden in subclasses. 402d4c0e62413ac4c81467ce59025c81210ea431752Reid Spencer virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, 403502f20b17ede40de84503010b7699b328a4f2867Evan Cheng llvm::Value *ObjCSuper, 404489393d7b92107cc3de17d8dbe7dd11ab7395fdcJeffrey Yasskin llvm::Value *cmd) = 0; 405489393d7b92107cc3de17d8dbe7dd11ab7395fdcJeffrey Yasskinpublic: 4068e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson CGObjCGNU(CodeGenModule &cgm, unsigned runtimeABIVersion, 4074b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner unsigned protocolClassVersion); 4084b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner 4094b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual llvm::Constant *GenerateConstantString(const StringLiteral *); 4104b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner 4114b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual RValue 4128e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson GenerateMessageSend(CodeGenFunction &CGF, 4138e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson ReturnValueSlot Return, 4148e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson QualType ResultType, 4154b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner Selector Sel, 4164b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner llvm::Value *Receiver, 417f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith const CallArgList &CallArgs, 418f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith const ObjCInterfaceDecl *Class, 419f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith const ObjCMethodDecl *Method); 420f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual RValue 421f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith GenerateMessageSendSuper(CodeGenFunction &CGF, 422f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith ReturnValueSlot Return, 423d95e67dac029d48984b72889a96a1bb389b8ac71Dylan Noblesmith QualType ResultType, 424f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith Selector Sel, 425439661395fd2a2a832dba01c65bc88718528313cEvan Cheng const ObjCInterfaceDecl *Class, 426f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith bool isCategoryImpl, 427f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith llvm::Value *Receiver, 428f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith bool IsClassMessage, 429f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith const CallArgList &CallArgs, 430f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith const ObjCMethodDecl *Method); 431f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Value *GetClass(CGBuilderTy &Builder, 432f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith const ObjCInterfaceDecl *OID); 433f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel, 434f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith bool lval = false); 4358e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual llvm::Value *GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl 4368e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson *Method); 4378e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual llvm::Constant *GetEHType(QualType T); 4388e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson 4398e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD, 4408e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson const ObjCContainerDecl *CD); 4418e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual void GenerateCategory(const ObjCCategoryImplDecl *CMD); 4428e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual void GenerateClass(const ObjCImplementationDecl *ClassDecl); 443f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Value *GenerateProtocolRef(CGBuilderTy &Builder, 444d40e103ea5bca8a223fc8261b3322b9454e9af12Peter Collingbourne const ObjCProtocolDecl *PD); 4458e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual void GenerateProtocol(const ObjCProtocolDecl *PD); 446f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Function *ModuleInitFunction(); 447f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Function *GetPropertyGetFunction(); 4489ea47179e647e806a2c67639bfead9d254514e59Dylan Noblesmith virtual llvm::Function *GetPropertySetFunction(); 449f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Function *GetSetStructFunction(); 450f5895e95926c96574888d7eb20b62d2cffe86193Dylan Noblesmith virtual llvm::Function *GetGetStructFunction(); 4518e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual llvm::Constant *EnumerationMutationFunction(); 4520f554492467064b3198df509227a3e902cf7cf1fBenjamin Kramer 4530f554492467064b3198df509227a3e902cf7cf1fBenjamin Kramer virtual void EmitTryStmt(CodeGenFunction &CGF, 4546456d8639b6f3ede1bb1a90a5d33fe4e719ad4acNick Lewycky const ObjCAtTryStmt &S); 4556456d8639b6f3ede1bb1a90a5d33fe4e719ad4acNick Lewycky virtual void EmitSynchronizedStmt(CodeGenFunction &CGF, 4566456d8639b6f3ede1bb1a90a5d33fe4e719ad4acNick Lewycky const ObjCAtSynchronizedStmt &S); 4576456d8639b6f3ede1bb1a90a5d33fe4e719ad4acNick Lewycky virtual void EmitThrowStmt(CodeGenFunction &CGF, 4586456d8639b6f3ede1bb1a90a5d33fe4e719ad4acNick Lewycky const ObjCAtThrowStmt &S); 45913a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo virtual llvm::Value * EmitObjCWeakRead(CodeGenFunction &CGF, 46013a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo llvm::Value *AddrWeakObj); 4614b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual void EmitObjCWeakAssign(CodeGenFunction &CGF, 4624b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner llvm::Value *src, llvm::Value *dst); 4634b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual void EmitObjCGlobalAssign(CodeGenFunction &CGF, 46413a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo llvm::Value *src, llvm::Value *dest, 465fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner bool threadlocal=false); 4664b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual void EmitObjCIvarAssign(CodeGenFunction &CGF, 467fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner llvm::Value *src, llvm::Value *dest, 468c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner llvm::Value *ivarOffset); 469c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner virtual void EmitObjCStrongCastAssign(CodeGenFunction &CGF, 470fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner llvm::Value *src, llvm::Value *dest); 4714b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual void EmitGCMemmoveCollectable(CodeGenFunction &CGF, 4724b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner llvm::Value *DestPtr, 47313a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo llvm::Value *SrcPtr, 47413a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo llvm::Value *Size); 47513a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo virtual LValue EmitObjCValueForIvar(CodeGenFunction &CGF, 47613a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo QualType ObjectTy, 47713a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo llvm::Value *BaseValue, 47813a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo const ObjCIvarDecl *Ivar, 47913a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo unsigned CVRQualifiers); 48013a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo virtual llvm::Value *EmitIvarOffset(CodeGenFunction &CGF, 48182d8277ad5862b54341808812bb4016e52347060Brian Gaeke const ObjCInterfaceDecl *Interface, 4824b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner const ObjCIvarDecl *Ivar); 4834b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner virtual llvm::Constant *BuildGCBlockLayout(CodeGenModule &CGM, 4840f554492467064b3198df509227a3e902cf7cf1fBenjamin Kramer const CGBlockInfo &blockInfo) { 4859ea47179e647e806a2c67639bfead9d254514e59Dylan Noblesmith return NULLPtr; 4868e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson } 4878e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson 4888e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson virtual llvm::GlobalVariable *GetClassGlobal(const std::string &Name) { 4898e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson return 0; 4908e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson } 4919ea47179e647e806a2c67639bfead9d254514e59Dylan Noblesmith}; 4928e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson/// Class representing the legacy GCC Objective-C ABI. This is the default when 4938e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson/// -fobjc-nonfragile-abi is not specified. 49413a3cf192887233fb9452ec5b7f841e4652c33c7Filip Pizlo/// 4950f554492467064b3198df509227a3e902cf7cf1fBenjamin Kramer/// The GCC ABI target actually generates code that is approximately compatible 4968e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson/// with the new GNUstep runtime ABI, but refrains from using any features that 4978e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson/// would not work with the GCC runtime. For example, clang always generates 4988e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson/// the extended form of the class structure, and the extra fields are simply 4998e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson/// ignored by GCC libobjc. 5000f554492467064b3198df509227a3e902cf7cf1fBenjamin Kramerclass CGObjCGCC : public CGObjCGNU { 5018e1fc56b2496270d1d6040cb648eef5d5aeb6079Owen Anderson /// The GCC ABI message lookup function. Returns an IMP pointing to the 502fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner /// method implementation for this message. 5034b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner LazyRuntimeFunction MsgLookupFn; 50482d8277ad5862b54341808812bb4016e52347060Brian Gaeke /// The GCC ABI superclass message lookup function. Takes a pointer to a 5054b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner /// structure describing the receiver and the class, and a selector as 5064b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner /// arguments. Returns the IMP for the corresponding method. 507fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner LazyRuntimeFunction MsgLookupSuperFn; 508fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattnerprotected: 509f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, 510c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner llvm::Value *&Receiver, 511c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner llvm::Value *cmd, 512fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner llvm::MDNode *node) { 5134b1511b027ce0b648b3379f2891816c25b46f515Reid Kleckner CGBuilderTy &Builder = CGF.Builder; 514c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner llvm::Value *imp = Builder.CreateCall2(MsgLookupFn, 5158005bcd5e0c923881d82afcb813a7e537cd1b241Jim Grosbach EnforceType(Builder, Receiver, IdTy), 5168005bcd5e0c923881d82afcb813a7e537cd1b241Jim Grosbach EnforceType(Builder, cmd, SelectorTy)); 517c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner cast<llvm::CallInst>(imp)->setMetadata(msgSendMDKind, node); 518c72efbeb42a9eaa0a83b8bba4954dcaf9ae64103Chris Lattner return imp; 51948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar } 52048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, 521fbd39762e9db897ffd8e30ce7d387715cba6d4c1Chris Lattner llvm::Value *ObjCSuper, 5228b5295b7bb8bf44f13df7fc8e38069d1218b1f94Chris Lattner llvm::Value *cmd) { 5238b5295b7bb8bf44f13df7fc8e38069d1218b1f94Chris Lattner CGBuilderTy &Builder = CGF.Builder; 524bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner llvm::Value *lookupArgs[] = {EnforceType(Builder, ObjCSuper, 52537df460874e8d9d28e6833e5fb66a9aa8e1ef50aBrian Gaeke PtrToObjCSuperTy), cmd}; 526bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner return Builder.CreateCall(MsgLookupSuperFn, lookupArgs, lookupArgs+2); 527bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner } 528ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer public: 52948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar CGObjCGCC(CodeGenModule &Mod) : CGObjCGNU(Mod, 8, 2) { 53048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // IMP objc_msg_lookup(id, SEL); 53168835dd5119150383938c701fc223077d2bc1e25Jeff Cohen MsgLookupFn.init(&CGM, "objc_msg_lookup", IMPTy, IdTy, SelectorTy, NULL); 53268835dd5119150383938c701fc223077d2bc1e25Jeff Cohen // IMP objc_msg_lookup_super(struct objc_super*, SEL); 53368835dd5119150383938c701fc223077d2bc1e25Jeff Cohen MsgLookupSuperFn.init(&CGM, "objc_msg_lookup_super", IMPTy, 53468835dd5119150383938c701fc223077d2bc1e25Jeff Cohen PtrToObjCSuperTy, SelectorTy, NULL); 53568835dd5119150383938c701fc223077d2bc1e25Jeff Cohen } 53668835dd5119150383938c701fc223077d2bc1e25Jeff Cohen}; 537c23197a26f34f559ea9797de51e187087c039c42Torok Edwin/// Class used when targeting the new GNUstep runtime ABI. 53848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbarclass CGObjCGNUstep : public CGObjCGNU { 53923e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin /// The slot lookup function. Returns a pointer to a cacheable structure 540bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner /// that contains (among other things) the IMP. 541bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner LazyRuntimeFunction SlotLookupFn; 54248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// The GNUstep ABI superclass message lookup function. Takes a pointer to 54348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar /// a structure describing the receiver and the class, and a selector as 544bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner /// arguments. Returns the slot for the corresponding method. Superclass 5453da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer /// message lookup rarely changes, so this is a good caching opportunity. 5465b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad LazyRuntimeFunction SlotLookupSuperFn; 5475b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad /// Type of an slot structure pointer. This is returned by the various 5485b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad /// lookup functions. 549953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Type *SlotTy; 550953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem protected: 5515b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, 5525b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad llvm::Value *&Receiver, 5535b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad llvm::Value *cmd, 5545b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad llvm::MDNode *node) { 5555b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad CGBuilderTy &Builder = CGF.Builder; 5565b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad llvm::Function *LookupFn = SlotLookupFn; 5575b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad 5585b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad // Store the receiver on the stack so that we can reload it later 559953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Value *ReceiverPtr = CGF.CreateTempAlloca(Receiver->getType()); 560953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Builder.CreateStore(Receiver, ReceiverPtr); 561953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 562953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Value *self; 563953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 564953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (isa<ObjCMethodDecl>(CGF.CurCodeDecl)) { 565953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem self = CGF.LoadObjCSelf(); 566953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } else { 567953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem self = llvm::ConstantPointerNull::get(IdTy); 568953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 5695b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad 5705b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad // The lookup function is guaranteed not to capture the receiver pointer. 5715b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad LookupFn->setDoesNotCapture(1); 5725b3701256c6706182ebfaeed8d50a66c6afe2a40Jay Foad 573d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner llvm::CallInst *slot = 57448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar Builder.CreateCall3(LookupFn, 5753da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer EnforceType(Builder, ReceiverPtr, PtrToIdTy), 576bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer EnforceType(Builder, cmd, SelectorTy), 577d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner EnforceType(Builder, self, IdTy)); 578d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner slot->setOnlyReadsMemory(); 57948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar slot->setMetadata(msgSendMDKind, node); 580bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 58198281a20503896349bd152e2dfe87435d3a6aadaNuno Lopes // Load the imp from the slot 58298281a20503896349bd152e2dfe87435d3a6aadaNuno Lopes llvm::Value *imp = Builder.CreateLoad(Builder.CreateStructGEP(slot, 4)); 583edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 5848fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // The lookup function may have changed the receiver, so make sure we use 58598281a20503896349bd152e2dfe87435d3a6aadaNuno Lopes // the new one. 586d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner Receiver = Builder.CreateLoad(ReceiverPtr, true); 587d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner return imp; 588bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer } 589bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, 590bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer llvm::Value *ObjCSuper, 591bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer llvm::Value *cmd) { 5923da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer CGBuilderTy &Builder = CGF.Builder; 5933da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer llvm::Value *lookupArgs[] = {ObjCSuper, cmd}; 594bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 595bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer llvm::CallInst *slot = Builder.CreateCall(SlotLookupSuperFn, lookupArgs, 596bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer lookupArgs+2); 597bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer slot->setOnlyReadsMemory(); 598bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 599bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer return Builder.CreateLoad(Builder.CreateStructGEP(slot, 4)); 600bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer } 601bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer public: 602bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer CGObjCGNUstep(CodeGenModule &Mod) : CGObjCGNU(Mod, 9, 3) { 603bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer llvm::StructType *SlotStructTy = llvm::StructType::get(VMContext, PtrTy, 604bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrTy, PtrTy, IntTy, IMPTy, NULL); 605bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SlotTy = llvm::PointerType::getUnqual(SlotStructTy); 606bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // Slot_t objc_msg_lookup_sender(id *receiver, SEL selector, id sender); 6071abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen SlotLookupFn.init(&CGM, "objc_msg_lookup_sender", SlotTy, PtrToIdTy, 608bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SelectorTy, IdTy, NULL); 609bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // Slot_t objc_msg_lookup_super(struct objc_super*, SEL); 610bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SlotLookupSuperFn.init(&CGM, "objc_slot_lookup_super", SlotTy, 611bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrToObjCSuperTy, SelectorTy, NULL); 612bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // If we're in ObjC++ mode, then we want to make 6131abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen if (CGM.getLangOptions().CPlusPlus) { 614bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer const llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); 615bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // void *__cxa_begin_catch(void *e) 616bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer EnterCatchFn.init(&CGM, "__cxa_begin_catch", PtrTy, PtrTy, NULL); 617bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // void __cxa_end_catch(void) 618bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer EnterCatchFn.init(&CGM, "__cxa_end_catch", VoidTy, NULL); 619bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // void _Unwind_Resume_or_Rethrow(void*) 620cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner ExceptionReThrowFn.init(&CGM, "_Unwind_Resume_or_Rethrow", VoidTy, PtrTy, NULL); 621bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer } 622cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner } 623bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer}; 624cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner 6253069cbf7b3ef9a31bbb8e434686b7259052c364aBenjamin Kramer} // end anonymous namespace 62648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 627628240649267597f3f27a51ab046b5841c24a953Dan Gohman 628628240649267597f3f27a51ab046b5841c24a953Dan Gohman/// Emits a reference to a dummy variable which is emitted with each class. 6297111b02c734c992b8c97d9918118768026dad79eDale Johannesen/// This ensures that a linker error will be generated when trying to link 6301abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen/// together modules where a referenced class is not defined. 631bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencervoid CGObjCGNU::EmitClassRef(const std::string &className) { 632bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer std::string symbolRef = "__objc_class_ref_" + className; 633bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // Don't emit two copies of the same symbol 634bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer if (TheModule.getGlobalVariable(symbolRef)) 635cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner return; 636bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer std::string symbolName = "__objc_class_name_" + className; 637cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner llvm::GlobalVariable *ClassSymbol = TheModule.getGlobalVariable(symbolName); 638bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer if (!ClassSymbol) { 639cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner ClassSymbol = new llvm::GlobalVariable(TheModule, LongTy, false, 6403069cbf7b3ef9a31bbb8e434686b7259052c364aBenjamin Kramer llvm::GlobalValue::ExternalLinkage, 0, symbolName); 64148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar } 642628240649267597f3f27a51ab046b5841c24a953Dan Gohman new llvm::GlobalVariable(TheModule, ClassSymbol->getType(), true, 643628240649267597f3f27a51ab046b5841c24a953Dan Gohman llvm::GlobalValue::WeakAnyLinkage, ClassSymbol, symbolRef); 6447111b02c734c992b8c97d9918118768026dad79eDale Johannesen} 6451abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen 646bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencerstatic std::string SymbolNameForMethod(const llvm::StringRef &ClassName, 647bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer const llvm::StringRef &CategoryName, const Selector MethodName, 648bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer bool isClassMethod) { 649bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer std::string MethodNameColonStripped = MethodName.getAsString(); 650bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer std::replace(MethodNameColonStripped.begin(), MethodNameColonStripped.end(), 651bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer ':', '_'); 652cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner return (llvm::Twine(isClassMethod ? "_c_" : "_i_") + ClassName + "_" + 653bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer CategoryName + "_" + MethodNameColonStripped).str(); 654cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner} 655bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 656cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris LattnerCGObjCGNU::CGObjCGNU(CodeGenModule &cgm, unsigned runtimeABIVersion, 6570a29cb045444c13160e90fe7942a9d7c720185edTim Northover unsigned protocolClassVersion) 6581abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen : CGM(cgm), TheModule(CGM.getModule()), VMContext(cgm.getLLVMContext()), 65923a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen ClassPtrAlias(0), MetaClassPtrAlias(0), RuntimeVersion(runtimeABIVersion), 6601abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen ProtocolVersion(protocolClassVersion) { 66148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 66223a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen msgSendMDKind = VMContext.getMDKindID("GNUObjCMessageSend"); 6631abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen 6641abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen CodeGenTypes &Types = CGM.getTypes(); 665bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer IntTy = cast<llvm::IntegerType>( 666bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer Types.ConvertType(CGM.getContext().IntTy)); 667bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer LongTy = cast<llvm::IntegerType>( 668bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer Types.ConvertType(CGM.getContext().LongTy)); 669bbc6e671b1a902c96aff152cc524a5ee6e253907Eli Friedman SizeTy = cast<llvm::IntegerType>( 670bbc6e671b1a902c96aff152cc524a5ee6e253907Eli Friedman Types.ConvertType(CGM.getContext().getSizeType())); 671bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrDiffTy = cast<llvm::IntegerType>( 672bbc6e671b1a902c96aff152cc524a5ee6e253907Eli Friedman Types.ConvertType(CGM.getContext().getPointerDiffType())); 673bbc6e671b1a902c96aff152cc524a5ee6e253907Eli Friedman BoolTy = CGM.getTypes().ConvertType(CGM.getContext().BoolTy); 674bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 6753da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer Int8Ty = llvm::Type::getInt8Ty(VMContext); 6763da59db637a887474c1b1346c1f3ccf53b6c4663Reid Spencer // C string type. Used in lots of places. 677bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrToInt8Ty = llvm::PointerType::getUnqual(Int8Ty); 678b52fb876171e3670e7307fda4459ca005d49d9f5Micah Villmow 679bbc6e671b1a902c96aff152cc524a5ee6e253907Eli Friedman Zeros[0] = llvm::ConstantInt::get(LongTy, 0); 680bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer Zeros[1] = Zeros[0]; 681bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer NULLPtr = llvm::ConstantPointerNull::get(PtrToInt8Ty); 682bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // Get the selector Type. 683bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer QualType selTy = CGM.getContext().getObjCSelType(); 684bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer if (QualType() == selTy) { 685bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SelectorTy = PtrToInt8Ty; 686db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner } else { 687bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SelectorTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(selTy)); 688c23197a26f34f559ea9797de51e187087c039c42Torok Edwin } 689bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 690b0bc6c361da9009e8414efde317d9bbff755f6c0Duncan Sands PtrToIntTy = llvm::PointerType::getUnqual(IntTy); 691cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner PtrTy = PtrToInt8Ty; 692bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 693cf0fe8d813727383d630055bb9d1cde21b00b7e7Chris Lattner // Object type 694bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer QualType UnqualIdTy = CGM.getContext().getObjCIdType(); 695bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer ASTIdTy = CanQualType(); 69648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar if (UnqualIdTy != QualType()) { 697b0bc6c361da9009e8414efde317d9bbff755f6c0Duncan Sands ASTIdTy = CGM.getContext().getCanonicalType(UnqualIdTy); 698e4d19c9eb22899c9a555395d446a9ceef3bea7ebJay Foad IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy)); 699bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer } else { 700bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer IdTy = PtrToInt8Ty; 701b0bc6c361da9009e8414efde317d9bbff755f6c0Duncan Sands } 702e4d19c9eb22899c9a555395d446a9ceef3bea7ebJay Foad PtrToIdTy = llvm::PointerType::getUnqual(IdTy); 703bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 704bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer ObjCSuperTy = llvm::StructType::get(VMContext, IdTy, IdTy, NULL); 7051df9859c40492511b8aa4321eb76496005d3b75bDuncan Sands PtrToObjCSuperTy = llvm::PointerType::getUnqual(ObjCSuperTy); 706bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 707bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer const llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); 708bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 709d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner // void objc_exception_throw(id); 7109a23122b6a4decff3d3f10cb8d9b5ccebe5c7474Chris Lattner ExceptionThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy, NULL); 711ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman ExceptionReThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy, NULL); 712bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // int objc_sync_enter(id); 713ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman SyncEnterFn.init(&CGM, "objc_sync_enter", IntTy, IdTy, NULL); 714bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // int objc_sync_exit(id); 715ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman SyncExitFn.init(&CGM, "objc_sync_exit", IntTy, IdTy, NULL); 716bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 717bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // void objc_enumerationMutation (id) 718bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer EnumerationMutationFn.init(&CGM, "objc_enumerationMutation", VoidTy, 719bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer IdTy, NULL); 720bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 721bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // id objc_getProperty(id, SEL, ptrdiff_t, BOOL) 722bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer GetPropertyFn.init(&CGM, "objc_getProperty", IdTy, IdTy, SelectorTy, 723bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrDiffTy, BoolTy, NULL); 724bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // void objc_setProperty(id, SEL, ptrdiff_t, id, BOOL, BOOL) 725bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SetPropertyFn.init(&CGM, "objc_setProperty", VoidTy, IdTy, SelectorTy, 7265f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner PtrDiffTy, IdTy, BoolTy, BoolTy, NULL); 727c23197a26f34f559ea9797de51e187087c039c42Torok Edwin // void objc_setPropertyStruct(void*, void*, ptrdiff_t, BOOL, BOOL) 728a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer GetStructPropertyFn.init(&CGM, "objc_getPropertyStruct", VoidTy, PtrTy, PtrTy, 729bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrDiffTy, BoolTy, BoolTy, NULL); 730c23197a26f34f559ea9797de51e187087c039c42Torok Edwin // void objc_setPropertyStruct(void*, void*, ptrdiff_t, BOOL, BOOL) 731bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SetStructPropertyFn.init(&CGM, "objc_setPropertyStruct", VoidTy, PtrTy, PtrTy, 732bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrDiffTy, BoolTy, BoolTy, NULL); 733bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 734bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // IMP type 735bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer std::vector<const llvm::Type*> IMPArgs; 736bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer IMPArgs.push_back(IdTy); 737bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer IMPArgs.push_back(SelectorTy); 738bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer IMPTy = llvm::PointerType::getUnqual(llvm::FunctionType::get(IdTy, IMPArgs, 739bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer true)); 740bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 741bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // Don't bother initialising the GC stuff unless we're compiling in GC mode 7425f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner if (CGM.getLangOptions().getGCMode() != LangOptions::NonGC) { 7435f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner // This is a bit of an hack. We should sort this out by having a proper 744bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // CGObjCGNUstep subclass for GC, but we may want to really support the old 745c23197a26f34f559ea9797de51e187087c039c42Torok Edwin // ABI and GC added in ObjectiveC2.framework, so we fudge it a bit for now 746ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman RuntimeVersion = 10; 747bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer // Get selectors needed in GC mode 748ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman RetainSel = GetNullarySelector("retain", CGM.getContext()); 749bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer ReleaseSel = GetNullarySelector("release", CGM.getContext()); 750ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman AutoreleaseSel = GetNullarySelector("autorelease", CGM.getContext()); 751bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 75248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // Get functions needed in GC mode 753bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer 75448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // id objc_assign_ivar(id, id, ptrdiff_t); 75587565c1d779a1903d10ddd11d886c0f79ee430b5Chris Lattner IvarAssignFn.init(&CGM, "objc_assign_ivar", IdTy, IdTy, IdTy, PtrDiffTy, 756bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer NULL); 7575f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner // id objc_assign_strongCast (id, id*) 7585f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner StrongCastAssignFn.init(&CGM, "objc_assign_strongCast", IdTy, IdTy, 759bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer PtrToIdTy, NULL); 760c23197a26f34f559ea9797de51e187087c039c42Torok Edwin // id objc_assign_global(id, id*); 761ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman GlobalAssignFn.init(&CGM, "objc_assign_global", IdTy, IdTy, PtrToIdTy, 762bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer NULL); 763ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman // id objc_assign_weak(id, id*); 764bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer WeakAssignFn.init(&CGM, "objc_assign_weak", IdTy, IdTy, PtrToIdTy, NULL); 765ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman // id objc_read_weak(id*); 766bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer WeakReadFn.init(&CGM, "objc_read_weak", IdTy, PtrToIdTy, NULL); 76748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // void *objc_memmove_collectable(void*, void *, size_t); 768bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer MemMoveFn.init(&CGM, "objc_memmove_collectable", PtrTy, PtrTy, PtrTy, 76948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar SizeTy, NULL); 77087565c1d779a1903d10ddd11d886c0f79ee430b5Chris Lattner } 771bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer} 7725f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner 7731abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen// This has to perform the lookup every time, since posing and related 7741abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen// techniques can modify the name -> class mapping. 7751abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesenllvm::Value *CGObjCGNU::GetClass(CGBuilderTy &Builder, 7760a29cb045444c13160e90fe7942a9d7c720185edTim Northover const ObjCInterfaceDecl *OID) { 7770a29cb045444c13160e90fe7942a9d7c720185edTim Northover llvm::Value *ClassName = CGM.GetAddrOfConstantCString(OID->getNameAsString()); 7781abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen // With the incompatible ABI, this will need to be replaced with a direct 779ab19da4bc087e79550ebe448d9edd4d8ed248388Daniel Dunbar // reference to the class symbol. For the compatible nonfragile ABI we are 780ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman // still performing this lookup at run time but emitting the symbol for the 7810a29cb045444c13160e90fe7942a9d7c720185edTim Northover // class externally so that we can make the switch later. 7827111b02c734c992b8c97d9918118768026dad79eDale Johannesen EmitClassRef(OID->getNameAsString()); 7831abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen ClassName = Builder.CreateStructGEP(ClassName, 0); 784ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman 7850a29cb045444c13160e90fe7942a9d7c720185edTim Northover std::vector<const llvm::Type*> Params(1, PtrToInt8Ty); 7860a29cb045444c13160e90fe7942a9d7c720185edTim Northover llvm::Constant *ClassLookupFn = 7877111b02c734c992b8c97d9918118768026dad79eDale Johannesen CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, 7881abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen Params, 789ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman true), 7900a29cb045444c13160e90fe7942a9d7c720185edTim Northover "objc_lookup_class"); 7910a29cb045444c13160e90fe7942a9d7c720185edTim Northover return Builder.CreateCall(ClassLookupFn, ClassName); 7927111b02c734c992b8c97d9918118768026dad79eDale Johannesen} 7931abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen 79448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbarllvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, Selector Sel, 7950a29cb045444c13160e90fe7942a9d7c720185edTim Northover const std::string &TypeEncoding, bool lval) { 7960a29cb045444c13160e90fe7942a9d7c720185edTim Northover 7977111b02c734c992b8c97d9918118768026dad79eDale Johannesen llvm::SmallVector<TypedSelector, 2> &Types = SelectorTable[Sel]; 7981abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen llvm::GlobalAlias *SelValue = 0; 79948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 8000a29cb045444c13160e90fe7942a9d7c720185edTim Northover 8010a29cb045444c13160e90fe7942a9d7c720185edTim Northover for (llvm::SmallVectorImpl<TypedSelector>::iterator i = Types.begin(), 8027111b02c734c992b8c97d9918118768026dad79eDale Johannesen e = Types.end() ; i!=e ; i++) { 8031abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen if (i->first == TypeEncoding) { 8041abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen SelValue = i->second; 8051abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen break; 8061abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen } 8075f90cb8c9838ab03feef93c9dacd5ff652e5d8d2Chris Lattner } 808bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer if (0 == SelValue) { 809bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer SelValue = new llvm::GlobalAlias(SelectorTy, 8109a23122b6a4decff3d3f10cb8d9b5ccebe5c7474Chris Lattner llvm::GlobalValue::PrivateLinkage, 8119a23122b6a4decff3d3f10cb8d9b5ccebe5c7474Chris Lattner ".objc_selector_"+Sel.getAsString(), NULL, 8129a23122b6a4decff3d3f10cb8d9b5ccebe5c7474Chris Lattner &TheModule); 81348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar Types.push_back(TypedSelector(TypeEncoding, SelValue)); 81448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar } 81548dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 81648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar if (lval) { 81748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Value *tmp = Builder.CreateAlloca(SelValue->getType()); 8189a23122b6a4decff3d3f10cb8d9b5ccebe5c7474Chris Lattner Builder.CreateStore(SelValue, tmp); 819edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman return tmp; 82048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar } 821bce30f1887631d606c44b8fdd185dcc42096ca60Reid Spencer return SelValue; 822f70c22b019494723d0e706f93d6542dfaa6e73a5Chris Lattner} 82348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 82448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbarllvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, Selector Sel, 8258fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer bool lval) { 8268fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer return GetSelector(Builder, Sel, std::string(), lval); 82743421b3dd70af5b70e71816521f37502c397cc65Dale Johannesen} 8288fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer 8291abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesenllvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl 8301abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen *Method) { 8311abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen std::string SelTypes; 8327111b02c734c992b8c97d9918118768026dad79eDale Johannesen CGM.getContext().getObjCEncodingForMethodDecl(Method, SelTypes); 8331abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen return GetSelector(Builder, Method->getSelector(), SelTypes, false); 8348fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer} 8358fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer 836a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencerllvm::Constant *CGObjCGNU::GetEHType(QualType T) { 837bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner if (!CGM.getLangOptions().CPlusPlus) { 83840cf2f954e7d554872f6eca42c844bc065b02c11Reid Spencer if (T->isObjCIdType() 839bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner || T->isObjCQualifiedIdType()) { 84040cf2f954e7d554872f6eca42c844bc065b02c11Reid Spencer // With the old ABI, there was only one kind of catchall, which broke 84140cf2f954e7d554872f6eca42c844bc065b02c11Reid Spencer // foreign exceptions. With the new ABI, we use __objc_id_typeinfo as 842f32a6a3091e0b01d17926f4b1cf78972854b8cb5Chris Lattner // a pointer indicating object catchalls, and NULL to indicate real 84340cf2f954e7d554872f6eca42c844bc065b02c11Reid Spencer // catchalls 844f32a6a3091e0b01d17926f4b1cf78972854b8cb5Chris Lattner if (CGM.getLangOptions().ObjCNonFragileABI) { 845f32a6a3091e0b01d17926f4b1cf78972854b8cb5Chris Lattner return MakeConstantString("@id"); 846f32a6a3091e0b01d17926f4b1cf78972854b8cb5Chris Lattner } else { 84740cf2f954e7d554872f6eca42c844bc065b02c11Reid Spencer return 0; 848c23197a26f34f559ea9797de51e187087c039c42Torok Edwin } 849bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner } 850953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 851953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // All other types should be Objective-C interface pointer types. 852953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem const ObjCObjectPointerType *OPT = 853953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem T->getAs<ObjCObjectPointerType>(); 854953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem assert(OPT && "Invalid @catch type."); 855953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem const ObjCInterfaceDecl *IDecl = 856953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem OPT->getObjectType()->getInterface(); 857953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem assert(IDecl && "Invalid @catch type."); 858953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem return MakeConstantString(IDecl->getIdentifier()->getName()); 859953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 860953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // For Objective-C++, we want to provide the ability to catch both C++ and 861953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Objective-C objects in the same function. 862953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 863953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // There's a particular fixed type info for 'id'. 864953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (T->isObjCIdType() || 865953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem T->isObjCQualifiedIdType()) { 866953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *IDEHType = 867953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem CGM.getModule().getGlobalVariable("__objc_id_type_info"); 868953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (!IDEHType) 869953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem IDEHType = 870953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem new llvm::GlobalVariable(CGM.getModule(), PtrToInt8Ty, 871953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem false, 872953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::GlobalValue::ExternalLinkage, 873953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 0, "__objc_id_type_info"); 874953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem return llvm::ConstantExpr::getBitCast(IDEHType, PtrToInt8Ty); 875953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 876953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 877953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem const ObjCObjectPointerType *PT = 878953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem T->getAs<ObjCObjectPointerType>(); 879953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem assert(PT && "Invalid @catch type."); 880953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem const ObjCInterfaceType *IT = PT->getInterfaceType(); 881953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem assert(IT && "Invalid @catch type."); 882953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem std::string className = IT->getDecl()->getIdentifier()->getName(); 883953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 884953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem std::string typeinfoName = "__objc_eh_typeinfo_" + className; 885953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 886953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Return the existing typeinfo if it exists 887953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *typeinfo = TheModule.getGlobalVariable(typeinfoName); 888953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (typeinfo) return typeinfo; 889953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 890953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Otherwise create it. 891953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 892953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // vtable for gnustep::libobjc::__objc_class_type_info 893953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // It's quite ugly hard-coding this. Ideally we'd generate it using the host 894953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // platform's name mangling. 895953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem const char *vtableName = "_ZTVN7gnustep7libobjc22__objc_class_type_infoE"; 896953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *Vtable = TheModule.getGlobalVariable(vtableName); 897953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (!Vtable) { 898953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Vtable = new llvm::GlobalVariable(TheModule, PtrToInt8Ty, true, 899953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::GlobalValue::ExternalLinkage, 0, vtableName); 900953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 901953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *Two = llvm::ConstantInt::get(IntTy, 2); 902953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Vtable = llvm::ConstantExpr::getGetElementPtr(Vtable, &Two, 1); 903953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Vtable = llvm::ConstantExpr::getBitCast(Vtable, PtrToInt8Ty); 904953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 905953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *typeName = 906953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ExportUniqueString(className, "__objc_eh_typename_"); 907953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 908953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem std::vector<llvm::Constant*> fields; 909953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem fields.push_back(Vtable); 910953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem fields.push_back(typeName); 911953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *TI = 912953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem MakeGlobal(llvm::StructType::get(VMContext, PtrToInt8Ty, PtrToInt8Ty, 913953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem NULL), fields, "__objc_eh_typeinfo_" + className, 914953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::GlobalValue::LinkOnceODRLinkage); 915953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem return llvm::ConstantExpr::getBitCast(TI, PtrToInt8Ty); 916953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem} 917953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 918953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem/// Generate an NSConstantString object. 919953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotemllvm::Constant *CGObjCGNU::GenerateConstantString(const StringLiteral *SL) { 920953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 921953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem std::string Str = SL->getString().str(); 922953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 923953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Look for an existing one 924953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::StringMap<llvm::Constant*>::iterator old = ObjCStrings.find(Str); 925953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (old != ObjCStrings.end()) 926953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem return old->getValue(); 927953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 928953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem std::vector<llvm::Constant*> Ivars; 929953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Ivars.push_back(NULLPtr); 930953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Ivars.push_back(MakeConstantString(Str)); 931953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Ivars.push_back(llvm::ConstantInt::get(IntTy, Str.size())); 932953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant *ObjCStr = MakeGlobal( 933953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::StructType::get(VMContext, PtrToInt8Ty, PtrToInt8Ty, IntTy, NULL), 934953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Ivars, ".objc_str"); 935953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ObjCStr = llvm::ConstantExpr::getBitCast(ObjCStr, PtrToInt8Ty); 936953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ObjCStrings[Str] = ObjCStr; 937953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ConstantStrings.push_back(ObjCStr); 938953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem return ObjCStr; 939953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem} 940953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 941953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem///Generates a message send where the super is the receiver. This is a message 942953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem///send to self with special delivery semantics indicating which class's method 943953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem///should be called. 944953783e00c9934bc41077108fffeb1e2a17b00dfNadav RotemRValue 945bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris LattnerCGObjCGNU::GenerateMessageSendSuper(CodeGenFunction &CGF, 94648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar ReturnValueSlot Return, 94748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar QualType ResultType, 94848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar Selector Sel, 94948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar const ObjCInterfaceDecl *Class, 950bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner bool isCategoryImpl, 95148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Value *Receiver, 952bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner bool IsClassMessage, 953bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner const CallArgList &CallArgs, 954bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner const ObjCMethodDecl *Method) { 9558a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands if (CGM.getLangOptions().getGCMode() != LangOptions::NonGC) { 9568a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands if (Sel == RetainSel || Sel == AutoreleaseSel) { 9578a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands return RValue::get(Receiver); 9588a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands } 9598a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands if (Sel == ReleaseSel) { 96059324297650c12a8dccf1a7ad650a9e895fdc17eRoman Divacky return RValue::get(0); 9618a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands } 96221a01d1ea89dba97c4f9e1f9f41485729a4046bcRafael Espindola } 9638a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 9648a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands CGBuilderTy &Builder = CGF.Builder; 9658a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Value *cmd = GetSelector(Builder, Sel); 96648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 9678a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 9688a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands CallArgList ActualArgs; 9698a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 9708a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands ActualArgs.add(RValue::get(EnforceType(Builder, Receiver, IdTy)), ASTIdTy); 9718a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands ActualArgs.add(RValue::get(cmd), CGF.getContext().getObjCSelType()); 9728a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands ActualArgs.insert(ActualArgs.end(), CallArgs.begin(), CallArgs.end()); 9738a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 9748a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands CodeGenTypes &Types = CGM.getTypes(); 9758a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs, 9768a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands FunctionType::ExtInfo()); 9778a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 9788a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Value *ReceiverClass = 0; 9798a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands if (isCategoryImpl) { 9808a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Constant *classLookupFunction = 0; 98189687e3e4ac4aa602de7cce4a7fbc5f514e86615Evan Cheng std::vector<const llvm::Type*> Params; 982db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Params.push_back(PtrTy); 9833574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow if (IsClassMessage) { 9841eff70451fbb079c1d5b8f45ff8c8a2b8f74d7baDuncan Sands classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( 9858a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands IdTy, Params, true), "objc_get_meta_class"); 986953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } else { 987953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( 988953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem IdTy, Params, true), "objc_get_class"); 9898a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands } 9908a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands ReceiverClass = Builder.CreateCall(classLookupFunction, 9918fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer MakeConstantString(Class->getNameAsString())); 9928fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer } else { 9938fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // Set up global aliases for the metaclass or class pointer if they do not 9948fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // already exist. These will are forward-references which will be set to 9958fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // pointers to the class and metaclass structure created for the runtime 9968fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // load function. To send a message to super, we look up the value of the 9978fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // super_class pointer from either the class or metaclass structure. 9981f8c564d7df985082d7e728330979781f384d0e9Dale Johannesen if (IsClassMessage) { 9991f8c564d7df985082d7e728330979781f384d0e9Dale Johannesen if (!MetaClassPtrAlias) { 10001f8c564d7df985082d7e728330979781f384d0e9Dale Johannesen MetaClassPtrAlias = new llvm::GlobalAlias(IdTy, 10018a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::GlobalValue::InternalLinkage, ".objc_metaclass_ref" + 10028a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands Class->getNameAsString(), NULL, &TheModule); 10038a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands } 100480d9e072625bc49dab4fa2da6c21bdd202509ee3Chandler Carruth ReceiverClass = MetaClassPtrAlias; 10058a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands } else { 10068fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer if (!ClassPtrAlias) { 10078fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer ClassPtrAlias = new llvm::GlobalAlias(IdTy, 1008953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::GlobalValue::InternalLinkage, ".objc_class_ref" + 1009953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Class->getNameAsString(), NULL, &TheModule); 1010953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 1011953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ReceiverClass = ClassPtrAlias; 1012953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 1013953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 1014953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Cast the pointer to a simplified version of the class structure 1015953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ReceiverClass = Builder.CreateBitCast(ReceiverClass, 1016953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::PointerType::getUnqual( 1017953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::StructType::get(VMContext, IdTy, IdTy, NULL))); 1018953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Get the superclass pointer 1019953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ReceiverClass = Builder.CreateStructGEP(ReceiverClass, 1); 1020953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem // Load the superclass pointer 1021bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner ReceiverClass = Builder.CreateLoad(ReceiverClass); 10228a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands // Construct the structure used to look up the IMP 102321a01d1ea89dba97c4f9e1f9f41485729a4046bcRafael Espindola llvm::StructType *ObjCSuperTy = llvm::StructType::get(VMContext, 10248a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands Receiver->getType(), IdTy, NULL); 10258a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Value *ObjCSuper = Builder.CreateAlloca(ObjCSuperTy); 10268a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 10278a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands Builder.CreateStore(Receiver, Builder.CreateStructGEP(ObjCSuper, 0)); 10288a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands Builder.CreateStore(ReceiverClass, Builder.CreateStructGEP(ObjCSuper, 1)); 10298a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 10308a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands ObjCSuper = EnforceType(Builder, ObjCSuper, PtrToObjCSuperTy); 10318a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands const llvm::FunctionType *impType = 1032c2680bef3b4994017d83293bc1337b26be54ac77David Greene Types.GetFunctionType(FnInfo, Method ? Method->isVariadic() : false); 1033c2680bef3b4994017d83293bc1337b26be54ac77David Greene 10348a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands // Get the IMP 103521a01d1ea89dba97c4f9e1f9f41485729a4046bcRafael Espindola llvm::Value *imp = LookupIMPSuper(CGF, ObjCSuper, cmd); 10368a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands imp = EnforceType(Builder, imp, llvm::PointerType::getUnqual(impType)); 10378a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 10388a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Value *impMD[] = { 10398a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::MDString::get(VMContext, Sel.getAsString()), 10408a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::MDString::get(VMContext, Class->getSuperClass()->getNameAsString()), 10418a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext), IsClassMessage) 10428a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands }; 10438a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD); 10448a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 10458a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands llvm::Instruction *call; 10468a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands RValue msgRet = CGF.EmitCall(FnInfo, imp, Return, ActualArgs, 10478a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 0, &call); 10488a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands call->setMetadata(msgSendMDKind, node); 10498a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands return msgRet; 10508a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands} 10518a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands 10528a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands/// Generate code for a message send expression. 1053bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris LattnerRValue 1054bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris LattnerCGObjCGNU::GenerateMessageSend(CodeGenFunction &CGF, 10554afac18fd4cae1b93907d7db03c5fdb7f2f66d64Misha Brukman ReturnValueSlot Return, 10564afac18fd4cae1b93907d7db03c5fdb7f2f66d64Misha Brukman QualType ResultType, 10578a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands Selector Sel, 105808bfe26f5a06bf9b0d6f8d2ceb5cb991d0d61842Duncan Sands llvm::Value *Receiver, 1059db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner const CallArgList &CallArgs, 10603574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow const ObjCInterfaceDecl *Class, 10618a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands const ObjCMethodDecl *Method) { 10628a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands // Strip out message sends to retain / release in GC mode 10638a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands if (CGM.getLangOptions().getGCMode() != LangOptions::NonGC) { 10641eff70451fbb079c1d5b8f45ff8c8a2b8f74d7baDuncan Sands if (Sel == RetainSel || Sel == AutoreleaseSel) { 10658a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands return RValue::get(Receiver); 10668a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands } 10678fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer if (Sel == ReleaseSel) { 10688fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer return RValue::get(0); 10698fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer } 10708fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer } 10718fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer 10728a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands CGBuilderTy &Builder = CGF.Builder; 10738fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer 10748a43e9e5d751ab827ba3ff0cf862787d3263a484Duncan Sands // If the return type is something that goes in an integer register, the 10758fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // runtime will handle 0 returns. For other cases, we fill in the 0 value 10768fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer // ourselves. 10771abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen // 10781abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen // The language spec says the result of this kind of message send is 10799e4635a5b8f56db607df2aca9cae1fc8d5a8bd36Duncan Sands // undefined, but lots of people seem to have forgotten to read that 10801f8c564d7df985082d7e728330979781f384d0e9Dale Johannesen // paragraph and insist on sending messages to nil that have structure 10811f8c564d7df985082d7e728330979781f384d0e9Dale Johannesen // returns. With GCC, this generates a random return value (whatever happens 10823ba292dbc2acee2d1052fb7ffe332e2164147b47Jeffrey Yasskin // to be on the stack / in those registers at the time) on most platforms, 10831abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen // and generates an illegal instruction trap on SPARC. With LLVM it corrupts 10841abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen // the stack. 1085953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem bool isPointerSizedReturn = (ResultType->isAnyPointerType() || 1086953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem ResultType->isIntegralOrEnumerationType() || ResultType->isVoidType()); 1087953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 1088953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::BasicBlock *startBB = 0; 1089953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::BasicBlock *messageBB = 0; 1090953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::BasicBlock *continueBB = 0; 1091953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 1092953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (!isPointerSizedReturn) { 1093953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem startBB = Builder.GetInsertBlock(); 1094953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem messageBB = CGF.createBasicBlock("msgSend"); 1095953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem continueBB = CGF.createBasicBlock("continue"); 1096953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 1097953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Value *isNil = Builder.CreateICmpEQ(Receiver, 1098953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Constant::getNullValue(Receiver->getType())); 1099953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem Builder.CreateCondBr(isNil, continueBB, messageBB); 1100953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem CGF.EmitBlock(messageBB); 1101953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem } 1102953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem 1103953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy)); 1104953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem llvm::Value *cmd; 1105953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem if (Method) 1106953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem cmd = GetSelector(Builder, Method); 1107953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem else 1108953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem cmd = GetSelector(Builder, Sel); 1109953783e00c9934bc41077108fffeb1e2a17b00dfNadav Rotem cmd = EnforceType(Builder, cmd, SelectorTy); 11108fb0f190a90f34b9d94d027ed8daf5f537e4b891Reid Spencer Receiver = EnforceType(Builder, Receiver, IdTy); 111148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar 111248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Value *impMD[] = { 111348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::MDString::get(VMContext, Sel.getAsString()), 111448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::MDString::get(VMContext, Class ? Class->getNameAsString() :""), 1115f88b9a639770327196b2a00f365155b954dd1d30Chris Lattner llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext), Class!=0) 1116f88b9a639770327196b2a00f365155b954dd1d30Chris Lattner }; 1117f88b9a639770327196b2a00f365155b954dd1d30Chris Lattner llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD); 1118bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 1119ae7c59a01286a3babbc6245dcb1049c7bcde2573David Greene // Get the IMP to call 1120dd947ea3c5e020c33c58a31939561265b980a3adDale Johannesen llvm::Value *imp = LookupIMP(CGF, Receiver, cmd, node); 11211ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner 1122bd1d382cc47dfc43ee758714bc22ab5a750bad15Chris Lattner CallArgList ActualArgs; 11231ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner ActualArgs.add(RValue::get(Receiver), ASTIdTy); 11241ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner ActualArgs.add(RValue::get(cmd), CGF.getContext().getObjCSelType()); 11257c2b7c7c75a3549b2d6933edf3110294a33ff2d4Robert Bocchino ActualArgs.insert(ActualArgs.end(), CallArgs.begin(), CallArgs.end()); 11263574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow 11277c2b7c7c75a3549b2d6933edf3110294a33ff2d4Robert Bocchino CodeGenTypes &Types = CGM.getTypes(); 11287c2b7c7c75a3549b2d6933edf3110294a33ff2d4Robert Bocchino const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs, 11297c2b7c7c75a3549b2d6933edf3110294a33ff2d4Robert Bocchino FunctionType::ExtInfo()); 11301ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner const llvm::FunctionType *impType = 11311ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner Types.GetFunctionType(FnInfo, Method ? Method->isVariadic() : false); 11321ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner imp = EnforceType(Builder, imp, llvm::PointerType::getUnqual(impType)); 11333574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow 1134b6e1dd70750d9b761779a00512e69c64a06ddfdeChris Lattner 11351ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner // For sender-aware dispatch, we pass the sender as the third argument to a 11361ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner // lookup function. When sending messages from C code, the sender is nil. 11371ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner // objc_msg_lookup_sender(id *receiver, SEL selector, id sender); 1138edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman llvm::Instruction *call; 11393574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow RValue msgRet = CGF.EmitCall(FnInfo, imp, Return, ActualArgs, 114015876bb28c9c0983279c30a123c13224648574c1Alkis Evlogimenos 0, &call); 114115876bb28c9c0983279c30a123c13224648574c1Alkis Evlogimenos call->setMetadata(msgSendMDKind, node); 1142bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 11431ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner 11441ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner if (!isPointerSizedReturn) { 11451ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner messageBB = CGF.Builder.GetInsertBlock(); 1146bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner CGF.Builder.CreateBr(continueBB); 11473574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow CGF.EmitBlock(continueBB); 114815876bb28c9c0983279c30a123c13224648574c1Alkis Evlogimenos if (msgRet.isScalar()) { 1149b1919e2f08ecb37140af676fd2916f8d5ed7df3dChris Lattner llvm::Value *v = msgRet.getScalarVal(); 1150bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner llvm::PHINode *phi = Builder.CreatePHI(v->getType(), 2); 11511ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner phi->addIncoming(v, messageBB); 11521ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner phi->addIncoming(llvm::Constant::getNullValue(v->getType()), startBB); 11531ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner msgRet = RValue::get(phi); 11541ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner } else if (msgRet.isAggregate()) { 11551ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner llvm::Value *v = msgRet.getAggregateAddr(); 11561ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner llvm::PHINode *phi = Builder.CreatePHI(v->getType(), 2); 11571ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner const llvm::PointerType *RetTy = cast<llvm::PointerType>(v->getType()); 11581ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner llvm::AllocaInst *NullVal = 11591ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner CGF.CreateTempAlloca(RetTy->getElementType(), "null"); 11601ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner CGF.InitTempAlloca(NullVal, 11611ee0ecf84a07693c3a517ba030fac8ac1f9f3fbcChris Lattner llvm::Constant::getNullValue(RetTy->getElementType())); 1162638e378f2cb62c34f306f8eadd43039e20caede4Dan Gohman phi->addIncoming(v, messageBB); 1163638e378f2cb62c34f306f8eadd43039e20caede4Dan Gohman phi->addIncoming(NullVal, startBB); 1164638e378f2cb62c34f306f8eadd43039e20caede4Dan Gohman msgRet = RValue::getAggregate(phi); 1165bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner } else /* isComplex() */ { 1166bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner std::pair<llvm::Value*,llvm::Value*> v = msgRet.getComplexVal(); 116748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::PHINode *phi = Builder.CreatePHI(v.first->getType(), 2); 1168c23197a26f34f559ea9797de51e187087c039c42Torok Edwin phi->addIncoming(v.first, messageBB); 1169bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner phi->addIncoming(llvm::Constant::getNullValue(v.first->getType()), 1170bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner startBB); 1171bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner llvm::PHINode *phi2 = Builder.CreatePHI(v.second->getType(), 2); 1172bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner phi2->addIncoming(v.second, messageBB); 1173bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner phi2->addIncoming(llvm::Constant::getNullValue(v.second->getType()), 1174bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner startBB); 1175bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner msgRet = RValue::getComplex(phi, phi2); 1176fe854034677f59baca1e38075e71f6efca247a03Chris Lattner } 1177fe854034677f59baca1e38075e71f6efca247a03Chris Lattner } 1178db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner return msgRet; 1179fe854034677f59baca1e38075e71f6efca247a03Chris Lattner} 1180fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 1181fe854034677f59baca1e38075e71f6efca247a03Chris Lattner/// Generates a MethodList. Used in construction of a objc_class and 1182fe854034677f59baca1e38075e71f6efca247a03Chris Lattner/// objc_category structures. 1183f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskinllvm::Constant *CGObjCGNU::GenerateMethodList(const llvm::StringRef &ClassName, 1184fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::StringRef &CategoryName, 1185fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::SmallVectorImpl<Selector> &MethodSels, 1186fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes, 1187bb46f52027416598a662dc1c58f48d9d56b1a65bRafael Espindola bool isClassMethodList) { 1188fe854034677f59baca1e38075e71f6efca247a03Chris Lattner if (MethodSels.empty()) 1189fe854034677f59baca1e38075e71f6efca247a03Chris Lattner return NULLPtr; 119048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // Get the method structure type. 119148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::StructType *ObjCMethodTy = llvm::StructType::get(VMContext, 1192fe854034677f59baca1e38075e71f6efca247a03Chris Lattner PtrToInt8Ty, // Really a selector, but the runtime creates it us. 1193fe854034677f59baca1e38075e71f6efca247a03Chris Lattner PtrToInt8Ty, // Method types 1194fe854034677f59baca1e38075e71f6efca247a03Chris Lattner IMPTy, //Method pointer 1195fe854034677f59baca1e38075e71f6efca247a03Chris Lattner NULL); 1196fe854034677f59baca1e38075e71f6efca247a03Chris Lattner std::vector<llvm::Constant*> Methods; 1197fe854034677f59baca1e38075e71f6efca247a03Chris Lattner std::vector<llvm::Constant*> Elements; 1198fe854034677f59baca1e38075e71f6efca247a03Chris Lattner for (unsigned int i = 0, e = MethodTypes.size(); i < e; ++i) { 1199fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.clear(); 120048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *Method = 1201fe854034677f59baca1e38075e71f6efca247a03Chris Lattner TheModule.getFunction(SymbolNameForMethod(ClassName, CategoryName, 1202b74ed07bfd3af42331b1964c24c39912610a08f4Anton Korobeynikov MethodSels[i], 1203b74ed07bfd3af42331b1964c24c39912610a08f4Anton Korobeynikov isClassMethodList)); 1204b74ed07bfd3af42331b1964c24c39912610a08f4Anton Korobeynikov assert(Method && "Can't generate metadata for method that doesn't exist"); 1205fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::Constant *C = MakeConstantString(MethodSels[i].getAsString()); 120648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar Elements.push_back(C); 1207fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.push_back(MethodTypes[i]); 1208aafce77b17d340aace52bcd49d1944109d82f14aDale Johannesen Method = llvm::ConstantExpr::getBitCast(Method, 120978ee7b78c3c47b71c4b7a1475438d6574216a64bAnton Korobeynikov IMPTy); 1210fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.push_back(Method); 1211d8c03bfa0a8cbcbf3ee31b0e9b52126c9dbafe2aChris Lattner Methods.push_back(llvm::ConstantStruct::get(ObjCMethodTy, Elements)); 1212bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner } 1213fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 121448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // Array of method structures 1215fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodTy, 1216fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Methods.size()); 1217f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin llvm::Constant *MethodArray = llvm::ConstantArray::get(ObjCMethodArrayTy, 1218fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Methods); 1219fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 1220fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Structure containing list pointer, array and array count 1221fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::SmallVector<const llvm::Type*, 16> ObjCMethodListFields; 122248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::PATypeHolder OpaqueNextTy = llvm::OpaqueType::get(VMContext); 1223fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::Type *NextPtrTy = llvm::PointerType::getUnqual(OpaqueNextTy); 1224fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::StructType *ObjCMethodListTy = llvm::StructType::get(VMContext, 1225fe854034677f59baca1e38075e71f6efca247a03Chris Lattner NextPtrTy, 1226fe854034677f59baca1e38075e71f6efca247a03Chris Lattner IntTy, 1227fe854034677f59baca1e38075e71f6efca247a03Chris Lattner ObjCMethodArrayTy, 1228fe854034677f59baca1e38075e71f6efca247a03Chris Lattner NULL); 1229fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Refine next pointer type to concrete type 1230fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::cast<llvm::OpaqueType>( 123148dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar OpaqueNextTy.get())->refineAbstractTypeTo(ObjCMethodListTy); 12325cbf985dcbc89fba3208e7baf8b6f488b06d3ec9Reid Spencer ObjCMethodListTy = llvm::cast<llvm::StructType>(OpaqueNextTy.get()); 123346fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray 1234fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Methods.clear(); 1235fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Methods.push_back(llvm::ConstantPointerNull::get( 1236fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::PointerType::getUnqual(ObjCMethodListTy))); 1237fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Methods.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 1238fbee579ed46016166d88b4defb81a2e7e253062dDaniel Dunbar MethodTypes.size())); 1239fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Methods.push_back(MethodArray); 1240fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 124175361b69f3f327842b9dad69fa7f28ae3b688412Chris Lattner // Create an instance of the structure 124231e2466f159a887fed9139067a676f65adf2a8c3Torok Edwin return MakeGlobal(ObjCMethodListTy, Methods, ".objc_method_list"); 1243fe854034677f59baca1e38075e71f6efca247a03Chris Lattner} 1244fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 1245fe854034677f59baca1e38075e71f6efca247a03Chris Lattner/// Generates an IvarList. Used in construction of a objc_class. 124648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbarllvm::Constant *CGObjCGNU::GenerateIvarList( 1247fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames, 1248fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes, 1249fe854034677f59baca1e38075e71f6efca247a03Chris Lattner const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets) { 1250fe854034677f59baca1e38075e71f6efca247a03Chris Lattner if (IvarNames.size() == 0) 1251fe854034677f59baca1e38075e71f6efca247a03Chris Lattner return NULLPtr; 1252fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Get the method structure type. 1253fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::StructType *ObjCIvarTy = llvm::StructType::get(VMContext, 1254fe854034677f59baca1e38075e71f6efca247a03Chris Lattner PtrToInt8Ty, 1255fe854034677f59baca1e38075e71f6efca247a03Chris Lattner PtrToInt8Ty, 1256c8ed902298b79e8a740e4f707f13089cf5ce1295Nuno Lopes IntTy, 1257fe854034677f59baca1e38075e71f6efca247a03Chris Lattner NULL); 1258fe854034677f59baca1e38075e71f6efca247a03Chris Lattner std::vector<llvm::Constant*> Ivars; 125948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar std::vector<llvm::Constant*> Elements; 126048dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar for (unsigned int i = 0, e = IvarNames.size() ; i < e ; i++) { 1261a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer Elements.clear(); 1262fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.push_back(IvarNames[i]); 1263fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.push_back(IvarTypes[i]); 12645cbf985dcbc89fba3208e7baf8b6f488b06d3ec9Reid Spencer Elements.push_back(IvarOffsets[i]); 1265fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Ivars.push_back(llvm::ConstantStruct::get(ObjCIvarTy, Elements)); 126648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar } 1267fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 1268fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Array of method structures 1269fe854034677f59baca1e38075e71f6efca247a03Chris Lattner llvm::ArrayType *ObjCIvarArrayTy = llvm::ArrayType::get(ObjCIvarTy, 1270fe854034677f59baca1e38075e71f6efca247a03Chris Lattner IvarNames.size()); 1271fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 1272fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 1273fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.clear(); 1274fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Elements.push_back(llvm::ConstantInt::get(IntTy, (int)IvarNames.size())); 127524b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner Elements.push_back(llvm::ConstantArray::get(ObjCIvarArrayTy, Ivars)); 127624b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner // Structure containing array and array count 127724b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner llvm::StructType *ObjCIvarListTy = llvm::StructType::get(VMContext, IntTy, 127824b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner ObjCIvarArrayTy, 127924b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner NULL); 1280c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 128155d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattner // Create an instance of the structure 128223c472436940aa7fc82ff99e8cca6788d08a8105Chris Lattner return MakeGlobal(ObjCIvarListTy, Elements, ".objc_ivar_list"); 128324b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner} 128424b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner 128546fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray/// Generate a class structure 128655d86482bd9fac6f90a7f6fb35c2f4dec9569fdbChris Lattnerllvm::Constant *CGObjCGNU::GenerateClassStructure( 128724b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner llvm::Constant *MetaClass, 128848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *SuperClass, 128946fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray unsigned info, 129046fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray const char *Name, 129146fa139e26be6ebc00be2fb45820c2560dd22a32Nicolas Geoffray llvm::Constant *Version, 129248dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar llvm::Constant *InstanceSize, 1293db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner llvm::Constant *IVars, 12943574eca1b02600bac4e625297f4ecf745f4c4f32Micah Villmow llvm::Constant *Methods, 1295813c8152825db530a6ef4ee86e8038bbee16deb3Chris Lattner llvm::Constant *Protocols, 129624b0a18c4357de0515c542e97edb2c2eacc543f2Chris Lattner llvm::Constant *IvarOffsets, 1297bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner llvm::Constant *Properties, 12984c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin bool isMeta) { 129923e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin // Set up the class structure 130023e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin // Note: Several of these are char*s when they should be ids. This is 130123e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin // because the runtime performs this translation on load. 13024c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin // 130348dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // Fields marked New ABI are part of the GNUstep runtime. We emit them 130448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // anyway; the classes will still work with the GNU runtime, they will just 130523e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin // be ignored. 130623e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin llvm::StructType *ClassTy = llvm::StructType::get(VMContext, 130748dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar PtrToInt8Ty, // class_pointer 130848dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar PtrToInt8Ty, // super_class 130948dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar PtrToInt8Ty, // name 131023e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin LongTy, // version 131123e5fcfec4640955fec41dc8348f467adf1a3e56Jeffrey Yasskin LongTy, // info 13124c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin LongTy, // instance_size 13134c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin IVars->getType(), // ivars 131448dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar Methods->getType(), // methods 131548dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar // These are all filled in by the runtime, so we pretend 131648dd875be12006060260526e4a1df0bae48dd5c9Daniel Dunbar PtrTy, // dtable 1317858143816d43e58b17bfd11cb1b57afbd7f0f893Craig Topper PtrTy, // subclass_list 1318858143816d43e58b17bfd11cb1b57afbd7f0f893Craig Topper PtrTy, // sibling_class 13194c5b23b24f230607fa18a162519875a91a5e89e0Jeffrey Yasskin PtrTy, // protocols 1320 PtrTy, // gc_object_type 1321 // New ABI: 1322 LongTy, // abi_version 1323 IvarOffsets->getType(), // ivar_offsets 1324 Properties->getType(), // properties 1325 NULL); 1326 llvm::Constant *Zero = llvm::ConstantInt::get(LongTy, 0); 1327 // Fill in the structure 1328 std::vector<llvm::Constant*> Elements; 1329 Elements.push_back(llvm::ConstantExpr::getBitCast(MetaClass, PtrToInt8Ty)); 1330 Elements.push_back(SuperClass); 1331 Elements.push_back(MakeConstantString(Name, ".class_name")); 1332 Elements.push_back(Zero); 1333 Elements.push_back(llvm::ConstantInt::get(LongTy, info)); 1334 if (isMeta) { 1335 llvm::TargetData td(&TheModule); 1336 Elements.push_back( 1337 llvm::ConstantInt::get(LongTy, 1338 td.getTypeSizeInBits(ClassTy) / 1339 CGM.getContext().getCharWidth())); 1340 } else 1341 Elements.push_back(InstanceSize); 1342 Elements.push_back(IVars); 1343 Elements.push_back(Methods); 1344 Elements.push_back(NULLPtr); 1345 Elements.push_back(NULLPtr); 1346 Elements.push_back(NULLPtr); 1347 Elements.push_back(llvm::ConstantExpr::getBitCast(Protocols, PtrTy)); 1348 Elements.push_back(NULLPtr); 1349 Elements.push_back(Zero); 1350 Elements.push_back(IvarOffsets); 1351 Elements.push_back(Properties); 1352 // Create an instance of the structure 1353 // This is now an externally visible symbol, so that we can speed up class 1354 // messages in the next ABI. 1355 return MakeGlobal(ClassTy, Elements, (isMeta ? "_OBJC_METACLASS_": 1356 "_OBJC_CLASS_") + std::string(Name), llvm::GlobalValue::ExternalLinkage); 1357} 1358 1359llvm::Constant *CGObjCGNU::GenerateProtocolMethodList( 1360 const llvm::SmallVectorImpl<llvm::Constant *> &MethodNames, 1361 const llvm::SmallVectorImpl<llvm::Constant *> &MethodTypes) { 1362 // Get the method structure type. 1363 llvm::StructType *ObjCMethodDescTy = llvm::StructType::get(VMContext, 1364 PtrToInt8Ty, // Really a selector, but the runtime does the casting for us. 1365 PtrToInt8Ty, 1366 NULL); 1367 std::vector<llvm::Constant*> Methods; 1368 std::vector<llvm::Constant*> Elements; 1369 for (unsigned int i = 0, e = MethodTypes.size() ; i < e ; i++) { 1370 Elements.clear(); 1371 Elements.push_back(MethodNames[i]); 1372 Elements.push_back(MethodTypes[i]); 1373 Methods.push_back(llvm::ConstantStruct::get(ObjCMethodDescTy, Elements)); 1374 } 1375 llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodDescTy, 1376 MethodNames.size()); 1377 llvm::Constant *Array = llvm::ConstantArray::get(ObjCMethodArrayTy, 1378 Methods); 1379 llvm::StructType *ObjCMethodDescListTy = llvm::StructType::get(VMContext, 1380 IntTy, ObjCMethodArrayTy, NULL); 1381 Methods.clear(); 1382 Methods.push_back(llvm::ConstantInt::get(IntTy, MethodNames.size())); 1383 Methods.push_back(Array); 1384 return MakeGlobal(ObjCMethodDescListTy, Methods, ".objc_method_list"); 1385} 1386 1387// Create the protocol list structure used in classes, categories and so on 1388llvm::Constant *CGObjCGNU::GenerateProtocolList( 1389 const llvm::SmallVectorImpl<std::string> &Protocols) { 1390 llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrToInt8Ty, 1391 Protocols.size()); 1392 llvm::StructType *ProtocolListTy = llvm::StructType::get(VMContext, 1393 PtrTy, //Should be a recurisve pointer, but it's always NULL here. 1394 SizeTy, 1395 ProtocolArrayTy, 1396 NULL); 1397 std::vector<llvm::Constant*> Elements; 1398 for (const std::string *iter = Protocols.begin(), *endIter = Protocols.end(); 1399 iter != endIter ; iter++) { 1400 llvm::Constant *protocol = 0; 1401 llvm::StringMap<llvm::Constant*>::iterator value = 1402 ExistingProtocols.find(*iter); 1403 if (value == ExistingProtocols.end()) { 1404 protocol = GenerateEmptyProtocol(*iter); 1405 } else { 1406 protocol = value->getValue(); 1407 } 1408 llvm::Constant *Ptr = llvm::ConstantExpr::getBitCast(protocol, 1409 PtrToInt8Ty); 1410 Elements.push_back(Ptr); 1411 } 1412 llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, 1413 Elements); 1414 Elements.clear(); 1415 Elements.push_back(NULLPtr); 1416 Elements.push_back(llvm::ConstantInt::get(LongTy, Protocols.size())); 1417 Elements.push_back(ProtocolArray); 1418 return MakeGlobal(ProtocolListTy, Elements, ".objc_protocol_list"); 1419} 1420 1421llvm::Value *CGObjCGNU::GenerateProtocolRef(CGBuilderTy &Builder, 1422 const ObjCProtocolDecl *PD) { 1423 llvm::Value *protocol = ExistingProtocols[PD->getNameAsString()]; 1424 const llvm::Type *T = 1425 CGM.getTypes().ConvertType(CGM.getContext().getObjCProtoType()); 1426 return Builder.CreateBitCast(protocol, llvm::PointerType::getUnqual(T)); 1427} 1428 1429llvm::Constant *CGObjCGNU::GenerateEmptyProtocol( 1430 const std::string &ProtocolName) { 1431 llvm::SmallVector<std::string, 0> EmptyStringVector; 1432 llvm::SmallVector<llvm::Constant*, 0> EmptyConstantVector; 1433 1434 llvm::Constant *ProtocolList = GenerateProtocolList(EmptyStringVector); 1435 llvm::Constant *MethodList = 1436 GenerateProtocolMethodList(EmptyConstantVector, EmptyConstantVector); 1437 // Protocols are objects containing lists of the methods implemented and 1438 // protocols adopted. 1439 llvm::StructType *ProtocolTy = llvm::StructType::get(VMContext, IdTy, 1440 PtrToInt8Ty, 1441 ProtocolList->getType(), 1442 MethodList->getType(), 1443 MethodList->getType(), 1444 MethodList->getType(), 1445 MethodList->getType(), 1446 NULL); 1447 std::vector<llvm::Constant*> Elements; 1448 // The isa pointer must be set to a magic number so the runtime knows it's 1449 // the correct layout. 1450 Elements.push_back(llvm::ConstantExpr::getIntToPtr( 1451 llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 1452 ProtocolVersion), IdTy)); 1453 Elements.push_back(MakeConstantString(ProtocolName, ".objc_protocol_name")); 1454 Elements.push_back(ProtocolList); 1455 Elements.push_back(MethodList); 1456 Elements.push_back(MethodList); 1457 Elements.push_back(MethodList); 1458 Elements.push_back(MethodList); 1459 return MakeGlobal(ProtocolTy, Elements, ".objc_protocol"); 1460} 1461 1462void CGObjCGNU::GenerateProtocol(const ObjCProtocolDecl *PD) { 1463 ASTContext &Context = CGM.getContext(); 1464 std::string ProtocolName = PD->getNameAsString(); 1465 llvm::SmallVector<std::string, 16> Protocols; 1466 for (ObjCProtocolDecl::protocol_iterator PI = PD->protocol_begin(), 1467 E = PD->protocol_end(); PI != E; ++PI) 1468 Protocols.push_back((*PI)->getNameAsString()); 1469 llvm::SmallVector<llvm::Constant*, 16> InstanceMethodNames; 1470 llvm::SmallVector<llvm::Constant*, 16> InstanceMethodTypes; 1471 llvm::SmallVector<llvm::Constant*, 16> OptionalInstanceMethodNames; 1472 llvm::SmallVector<llvm::Constant*, 16> OptionalInstanceMethodTypes; 1473 for (ObjCProtocolDecl::instmeth_iterator iter = PD->instmeth_begin(), 1474 E = PD->instmeth_end(); iter != E; iter++) { 1475 std::string TypeStr; 1476 Context.getObjCEncodingForMethodDecl(*iter, TypeStr); 1477 if ((*iter)->getImplementationControl() == ObjCMethodDecl::Optional) { 1478 InstanceMethodNames.push_back( 1479 MakeConstantString((*iter)->getSelector().getAsString())); 1480 InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 1481 } else { 1482 OptionalInstanceMethodNames.push_back( 1483 MakeConstantString((*iter)->getSelector().getAsString())); 1484 OptionalInstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 1485 } 1486 } 1487 // Collect information about class methods: 1488 llvm::SmallVector<llvm::Constant*, 16> ClassMethodNames; 1489 llvm::SmallVector<llvm::Constant*, 16> ClassMethodTypes; 1490 llvm::SmallVector<llvm::Constant*, 16> OptionalClassMethodNames; 1491 llvm::SmallVector<llvm::Constant*, 16> OptionalClassMethodTypes; 1492 for (ObjCProtocolDecl::classmeth_iterator 1493 iter = PD->classmeth_begin(), endIter = PD->classmeth_end(); 1494 iter != endIter ; iter++) { 1495 std::string TypeStr; 1496 Context.getObjCEncodingForMethodDecl((*iter),TypeStr); 1497 if ((*iter)->getImplementationControl() == ObjCMethodDecl::Optional) { 1498 ClassMethodNames.push_back( 1499 MakeConstantString((*iter)->getSelector().getAsString())); 1500 ClassMethodTypes.push_back(MakeConstantString(TypeStr)); 1501 } else { 1502 OptionalClassMethodNames.push_back( 1503 MakeConstantString((*iter)->getSelector().getAsString())); 1504 OptionalClassMethodTypes.push_back(MakeConstantString(TypeStr)); 1505 } 1506 } 1507 1508 llvm::Constant *ProtocolList = GenerateProtocolList(Protocols); 1509 llvm::Constant *InstanceMethodList = 1510 GenerateProtocolMethodList(InstanceMethodNames, InstanceMethodTypes); 1511 llvm::Constant *ClassMethodList = 1512 GenerateProtocolMethodList(ClassMethodNames, ClassMethodTypes); 1513 llvm::Constant *OptionalInstanceMethodList = 1514 GenerateProtocolMethodList(OptionalInstanceMethodNames, 1515 OptionalInstanceMethodTypes); 1516 llvm::Constant *OptionalClassMethodList = 1517 GenerateProtocolMethodList(OptionalClassMethodNames, 1518 OptionalClassMethodTypes); 1519 1520 // Property metadata: name, attributes, isSynthesized, setter name, setter 1521 // types, getter name, getter types. 1522 // The isSynthesized value is always set to 0 in a protocol. It exists to 1523 // simplify the runtime library by allowing it to use the same data 1524 // structures for protocol metadata everywhere. 1525 llvm::StructType *PropertyMetadataTy = llvm::StructType::get(VMContext, 1526 PtrToInt8Ty, Int8Ty, Int8Ty, PtrToInt8Ty, PtrToInt8Ty, PtrToInt8Ty, 1527 PtrToInt8Ty, NULL); 1528 std::vector<llvm::Constant*> Properties; 1529 std::vector<llvm::Constant*> OptionalProperties; 1530 1531 // Add all of the property methods need adding to the method list and to the 1532 // property metadata list. 1533 for (ObjCContainerDecl::prop_iterator 1534 iter = PD->prop_begin(), endIter = PD->prop_end(); 1535 iter != endIter ; iter++) { 1536 std::vector<llvm::Constant*> Fields; 1537 ObjCPropertyDecl *property = (*iter); 1538 1539 Fields.push_back(MakeConstantString(property->getNameAsString())); 1540 Fields.push_back(llvm::ConstantInt::get(Int8Ty, 1541 property->getPropertyAttributes())); 1542 Fields.push_back(llvm::ConstantInt::get(Int8Ty, 0)); 1543 if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { 1544 std::string TypeStr; 1545 Context.getObjCEncodingForMethodDecl(getter,TypeStr); 1546 llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 1547 InstanceMethodTypes.push_back(TypeEncoding); 1548 Fields.push_back(MakeConstantString(getter->getSelector().getAsString())); 1549 Fields.push_back(TypeEncoding); 1550 } else { 1551 Fields.push_back(NULLPtr); 1552 Fields.push_back(NULLPtr); 1553 } 1554 if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { 1555 std::string TypeStr; 1556 Context.getObjCEncodingForMethodDecl(setter,TypeStr); 1557 llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 1558 InstanceMethodTypes.push_back(TypeEncoding); 1559 Fields.push_back(MakeConstantString(setter->getSelector().getAsString())); 1560 Fields.push_back(TypeEncoding); 1561 } else { 1562 Fields.push_back(NULLPtr); 1563 Fields.push_back(NULLPtr); 1564 } 1565 if (property->getPropertyImplementation() == ObjCPropertyDecl::Optional) { 1566 OptionalProperties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); 1567 } else { 1568 Properties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); 1569 } 1570 } 1571 llvm::Constant *PropertyArray = llvm::ConstantArray::get( 1572 llvm::ArrayType::get(PropertyMetadataTy, Properties.size()), Properties); 1573 llvm::Constant* PropertyListInitFields[] = 1574 {llvm::ConstantInt::get(IntTy, Properties.size()), NULLPtr, PropertyArray}; 1575 1576 llvm::Constant *PropertyListInit = 1577 llvm::ConstantStruct::get(VMContext, PropertyListInitFields, 3, false); 1578 llvm::Constant *PropertyList = new llvm::GlobalVariable(TheModule, 1579 PropertyListInit->getType(), false, llvm::GlobalValue::InternalLinkage, 1580 PropertyListInit, ".objc_property_list"); 1581 1582 llvm::Constant *OptionalPropertyArray = 1583 llvm::ConstantArray::get(llvm::ArrayType::get(PropertyMetadataTy, 1584 OptionalProperties.size()) , OptionalProperties); 1585 llvm::Constant* OptionalPropertyListInitFields[] = { 1586 llvm::ConstantInt::get(IntTy, OptionalProperties.size()), NULLPtr, 1587 OptionalPropertyArray }; 1588 1589 llvm::Constant *OptionalPropertyListInit = 1590 llvm::ConstantStruct::get(VMContext, OptionalPropertyListInitFields, 3, false); 1591 llvm::Constant *OptionalPropertyList = new llvm::GlobalVariable(TheModule, 1592 OptionalPropertyListInit->getType(), false, 1593 llvm::GlobalValue::InternalLinkage, OptionalPropertyListInit, 1594 ".objc_property_list"); 1595 1596 // Protocols are objects containing lists of the methods implemented and 1597 // protocols adopted. 1598 llvm::StructType *ProtocolTy = llvm::StructType::get(VMContext, IdTy, 1599 PtrToInt8Ty, 1600 ProtocolList->getType(), 1601 InstanceMethodList->getType(), 1602 ClassMethodList->getType(), 1603 OptionalInstanceMethodList->getType(), 1604 OptionalClassMethodList->getType(), 1605 PropertyList->getType(), 1606 OptionalPropertyList->getType(), 1607 NULL); 1608 std::vector<llvm::Constant*> Elements; 1609 // The isa pointer must be set to a magic number so the runtime knows it's 1610 // the correct layout. 1611 Elements.push_back(llvm::ConstantExpr::getIntToPtr( 1612 llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 1613 ProtocolVersion), IdTy)); 1614 Elements.push_back(MakeConstantString(ProtocolName, ".objc_protocol_name")); 1615 Elements.push_back(ProtocolList); 1616 Elements.push_back(InstanceMethodList); 1617 Elements.push_back(ClassMethodList); 1618 Elements.push_back(OptionalInstanceMethodList); 1619 Elements.push_back(OptionalClassMethodList); 1620 Elements.push_back(PropertyList); 1621 Elements.push_back(OptionalPropertyList); 1622 ExistingProtocols[ProtocolName] = 1623 llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolTy, Elements, 1624 ".objc_protocol"), IdTy); 1625} 1626void CGObjCGNU::GenerateProtocolHolderCategory(void) { 1627 // Collect information about instance methods 1628 llvm::SmallVector<Selector, 1> MethodSels; 1629 llvm::SmallVector<llvm::Constant*, 1> MethodTypes; 1630 1631 std::vector<llvm::Constant*> Elements; 1632 const std::string ClassName = "__ObjC_Protocol_Holder_Ugly_Hack"; 1633 const std::string CategoryName = "AnotherHack"; 1634 Elements.push_back(MakeConstantString(CategoryName)); 1635 Elements.push_back(MakeConstantString(ClassName)); 1636 // Instance method list 1637 Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1638 ClassName, CategoryName, MethodSels, MethodTypes, false), PtrTy)); 1639 // Class method list 1640 Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1641 ClassName, CategoryName, MethodSels, MethodTypes, true), PtrTy)); 1642 // Protocol list 1643 llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrTy, 1644 ExistingProtocols.size()); 1645 llvm::StructType *ProtocolListTy = llvm::StructType::get(VMContext, 1646 PtrTy, //Should be a recurisve pointer, but it's always NULL here. 1647 SizeTy, 1648 ProtocolArrayTy, 1649 NULL); 1650 std::vector<llvm::Constant*> ProtocolElements; 1651 for (llvm::StringMapIterator<llvm::Constant*> iter = 1652 ExistingProtocols.begin(), endIter = ExistingProtocols.end(); 1653 iter != endIter ; iter++) { 1654 llvm::Constant *Ptr = llvm::ConstantExpr::getBitCast(iter->getValue(), 1655 PtrTy); 1656 ProtocolElements.push_back(Ptr); 1657 } 1658 llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, 1659 ProtocolElements); 1660 ProtocolElements.clear(); 1661 ProtocolElements.push_back(NULLPtr); 1662 ProtocolElements.push_back(llvm::ConstantInt::get(LongTy, 1663 ExistingProtocols.size())); 1664 ProtocolElements.push_back(ProtocolArray); 1665 Elements.push_back(llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolListTy, 1666 ProtocolElements, ".objc_protocol_list"), PtrTy)); 1667 Categories.push_back(llvm::ConstantExpr::getBitCast( 1668 MakeGlobal(llvm::StructType::get(VMContext, PtrToInt8Ty, PtrToInt8Ty, 1669 PtrTy, PtrTy, PtrTy, NULL), Elements), PtrTy)); 1670} 1671 1672void CGObjCGNU::GenerateCategory(const ObjCCategoryImplDecl *OCD) { 1673 std::string ClassName = OCD->getClassInterface()->getNameAsString(); 1674 std::string CategoryName = OCD->getNameAsString(); 1675 // Collect information about instance methods 1676 llvm::SmallVector<Selector, 16> InstanceMethodSels; 1677 llvm::SmallVector<llvm::Constant*, 16> InstanceMethodTypes; 1678 for (ObjCCategoryImplDecl::instmeth_iterator 1679 iter = OCD->instmeth_begin(), endIter = OCD->instmeth_end(); 1680 iter != endIter ; iter++) { 1681 InstanceMethodSels.push_back((*iter)->getSelector()); 1682 std::string TypeStr; 1683 CGM.getContext().getObjCEncodingForMethodDecl(*iter,TypeStr); 1684 InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 1685 } 1686 1687 // Collect information about class methods 1688 llvm::SmallVector<Selector, 16> ClassMethodSels; 1689 llvm::SmallVector<llvm::Constant*, 16> ClassMethodTypes; 1690 for (ObjCCategoryImplDecl::classmeth_iterator 1691 iter = OCD->classmeth_begin(), endIter = OCD->classmeth_end(); 1692 iter != endIter ; iter++) { 1693 ClassMethodSels.push_back((*iter)->getSelector()); 1694 std::string TypeStr; 1695 CGM.getContext().getObjCEncodingForMethodDecl(*iter,TypeStr); 1696 ClassMethodTypes.push_back(MakeConstantString(TypeStr)); 1697 } 1698 1699 // Collect the names of referenced protocols 1700 llvm::SmallVector<std::string, 16> Protocols; 1701 const ObjCCategoryDecl *CatDecl = OCD->getCategoryDecl(); 1702 const ObjCList<ObjCProtocolDecl> &Protos = CatDecl->getReferencedProtocols(); 1703 for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), 1704 E = Protos.end(); I != E; ++I) 1705 Protocols.push_back((*I)->getNameAsString()); 1706 1707 std::vector<llvm::Constant*> Elements; 1708 Elements.push_back(MakeConstantString(CategoryName)); 1709 Elements.push_back(MakeConstantString(ClassName)); 1710 // Instance method list 1711 Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1712 ClassName, CategoryName, InstanceMethodSels, InstanceMethodTypes, 1713 false), PtrTy)); 1714 // Class method list 1715 Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1716 ClassName, CategoryName, ClassMethodSels, ClassMethodTypes, true), 1717 PtrTy)); 1718 // Protocol list 1719 Elements.push_back(llvm::ConstantExpr::getBitCast( 1720 GenerateProtocolList(Protocols), PtrTy)); 1721 Categories.push_back(llvm::ConstantExpr::getBitCast( 1722 MakeGlobal(llvm::StructType::get(VMContext, PtrToInt8Ty, PtrToInt8Ty, 1723 PtrTy, PtrTy, PtrTy, NULL), Elements), PtrTy)); 1724} 1725 1726llvm::Constant *CGObjCGNU::GeneratePropertyList(const ObjCImplementationDecl *OID, 1727 llvm::SmallVectorImpl<Selector> &InstanceMethodSels, 1728 llvm::SmallVectorImpl<llvm::Constant*> &InstanceMethodTypes) { 1729 ASTContext &Context = CGM.getContext(); 1730 // 1731 // Property metadata: name, attributes, isSynthesized, setter name, setter 1732 // types, getter name, getter types. 1733 llvm::StructType *PropertyMetadataTy = llvm::StructType::get(VMContext, 1734 PtrToInt8Ty, Int8Ty, Int8Ty, PtrToInt8Ty, PtrToInt8Ty, PtrToInt8Ty, 1735 PtrToInt8Ty, NULL); 1736 std::vector<llvm::Constant*> Properties; 1737 1738 1739 // Add all of the property methods need adding to the method list and to the 1740 // property metadata list. 1741 for (ObjCImplDecl::propimpl_iterator 1742 iter = OID->propimpl_begin(), endIter = OID->propimpl_end(); 1743 iter != endIter ; iter++) { 1744 std::vector<llvm::Constant*> Fields; 1745 ObjCPropertyDecl *property = (*iter)->getPropertyDecl(); 1746 ObjCPropertyImplDecl *propertyImpl = *iter; 1747 bool isSynthesized = (propertyImpl->getPropertyImplementation() == 1748 ObjCPropertyImplDecl::Synthesize); 1749 1750 Fields.push_back(MakeConstantString(property->getNameAsString())); 1751 Fields.push_back(llvm::ConstantInt::get(Int8Ty, 1752 property->getPropertyAttributes())); 1753 Fields.push_back(llvm::ConstantInt::get(Int8Ty, isSynthesized)); 1754 if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { 1755 std::string TypeStr; 1756 Context.getObjCEncodingForMethodDecl(getter,TypeStr); 1757 llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 1758 if (isSynthesized) { 1759 InstanceMethodTypes.push_back(TypeEncoding); 1760 InstanceMethodSels.push_back(getter->getSelector()); 1761 } 1762 Fields.push_back(MakeConstantString(getter->getSelector().getAsString())); 1763 Fields.push_back(TypeEncoding); 1764 } else { 1765 Fields.push_back(NULLPtr); 1766 Fields.push_back(NULLPtr); 1767 } 1768 if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { 1769 std::string TypeStr; 1770 Context.getObjCEncodingForMethodDecl(setter,TypeStr); 1771 llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 1772 if (isSynthesized) { 1773 InstanceMethodTypes.push_back(TypeEncoding); 1774 InstanceMethodSels.push_back(setter->getSelector()); 1775 } 1776 Fields.push_back(MakeConstantString(setter->getSelector().getAsString())); 1777 Fields.push_back(TypeEncoding); 1778 } else { 1779 Fields.push_back(NULLPtr); 1780 Fields.push_back(NULLPtr); 1781 } 1782 Properties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); 1783 } 1784 llvm::ArrayType *PropertyArrayTy = 1785 llvm::ArrayType::get(PropertyMetadataTy, Properties.size()); 1786 llvm::Constant *PropertyArray = llvm::ConstantArray::get(PropertyArrayTy, 1787 Properties); 1788 llvm::Constant* PropertyListInitFields[] = 1789 {llvm::ConstantInt::get(IntTy, Properties.size()), NULLPtr, PropertyArray}; 1790 1791 llvm::Constant *PropertyListInit = 1792 llvm::ConstantStruct::get(VMContext, PropertyListInitFields, 3, false); 1793 return new llvm::GlobalVariable(TheModule, PropertyListInit->getType(), false, 1794 llvm::GlobalValue::InternalLinkage, PropertyListInit, 1795 ".objc_property_list"); 1796} 1797 1798void CGObjCGNU::GenerateClass(const ObjCImplementationDecl *OID) { 1799 ASTContext &Context = CGM.getContext(); 1800 1801 // Get the superclass name. 1802 const ObjCInterfaceDecl * SuperClassDecl = 1803 OID->getClassInterface()->getSuperClass(); 1804 std::string SuperClassName; 1805 if (SuperClassDecl) { 1806 SuperClassName = SuperClassDecl->getNameAsString(); 1807 EmitClassRef(SuperClassName); 1808 } 1809 1810 // Get the class name 1811 ObjCInterfaceDecl *ClassDecl = 1812 const_cast<ObjCInterfaceDecl *>(OID->getClassInterface()); 1813 std::string ClassName = ClassDecl->getNameAsString(); 1814 // Emit the symbol that is used to generate linker errors if this class is 1815 // referenced in other modules but not declared. 1816 std::string classSymbolName = "__objc_class_name_" + ClassName; 1817 if (llvm::GlobalVariable *symbol = 1818 TheModule.getGlobalVariable(classSymbolName)) { 1819 symbol->setInitializer(llvm::ConstantInt::get(LongTy, 0)); 1820 } else { 1821 new llvm::GlobalVariable(TheModule, LongTy, false, 1822 llvm::GlobalValue::ExternalLinkage, llvm::ConstantInt::get(LongTy, 0), 1823 classSymbolName); 1824 } 1825 1826 // Get the size of instances. 1827 int instanceSize = 1828 Context.getASTObjCImplementationLayout(OID).getSize().getQuantity(); 1829 1830 // Collect information about instance variables. 1831 llvm::SmallVector<llvm::Constant*, 16> IvarNames; 1832 llvm::SmallVector<llvm::Constant*, 16> IvarTypes; 1833 llvm::SmallVector<llvm::Constant*, 16> IvarOffsets; 1834 1835 std::vector<llvm::Constant*> IvarOffsetValues; 1836 1837 int superInstanceSize = !SuperClassDecl ? 0 : 1838 Context.getASTObjCInterfaceLayout(SuperClassDecl).getSize().getQuantity(); 1839 // For non-fragile ivars, set the instance size to 0 - {the size of just this 1840 // class}. The runtime will then set this to the correct value on load. 1841 if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { 1842 instanceSize = 0 - (instanceSize - superInstanceSize); 1843 } 1844 1845 // Collect declared and synthesized ivars. 1846 llvm::SmallVector<ObjCIvarDecl*, 16> OIvars; 1847 CGM.getContext().ShallowCollectObjCIvars(ClassDecl, OIvars); 1848 1849 for (unsigned i = 0, e = OIvars.size(); i != e; ++i) { 1850 ObjCIvarDecl *IVD = OIvars[i]; 1851 // Store the name 1852 IvarNames.push_back(MakeConstantString(IVD->getNameAsString())); 1853 // Get the type encoding for this ivar 1854 std::string TypeStr; 1855 Context.getObjCEncodingForType(IVD->getType(), TypeStr); 1856 IvarTypes.push_back(MakeConstantString(TypeStr)); 1857 // Get the offset 1858 uint64_t BaseOffset = ComputeIvarBaseOffset(CGM, OID, IVD); 1859 uint64_t Offset = BaseOffset; 1860 if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { 1861 Offset = BaseOffset - superInstanceSize; 1862 } 1863 IvarOffsets.push_back( 1864 llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), Offset)); 1865 IvarOffsetValues.push_back(new llvm::GlobalVariable(TheModule, IntTy, 1866 false, llvm::GlobalValue::ExternalLinkage, 1867 llvm::ConstantInt::get(IntTy, Offset), 1868 "__objc_ivar_offset_value_" + ClassName +"." + 1869 IVD->getNameAsString())); 1870 } 1871 llvm::GlobalVariable *IvarOffsetArray = 1872 MakeGlobalArray(PtrToIntTy, IvarOffsetValues, ".ivar.offsets"); 1873 1874 1875 // Collect information about instance methods 1876 llvm::SmallVector<Selector, 16> InstanceMethodSels; 1877 llvm::SmallVector<llvm::Constant*, 16> InstanceMethodTypes; 1878 for (ObjCImplementationDecl::instmeth_iterator 1879 iter = OID->instmeth_begin(), endIter = OID->instmeth_end(); 1880 iter != endIter ; iter++) { 1881 InstanceMethodSels.push_back((*iter)->getSelector()); 1882 std::string TypeStr; 1883 Context.getObjCEncodingForMethodDecl((*iter),TypeStr); 1884 InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 1885 } 1886 1887 llvm::Constant *Properties = GeneratePropertyList(OID, InstanceMethodSels, 1888 InstanceMethodTypes); 1889 1890 1891 // Collect information about class methods 1892 llvm::SmallVector<Selector, 16> ClassMethodSels; 1893 llvm::SmallVector<llvm::Constant*, 16> ClassMethodTypes; 1894 for (ObjCImplementationDecl::classmeth_iterator 1895 iter = OID->classmeth_begin(), endIter = OID->classmeth_end(); 1896 iter != endIter ; iter++) { 1897 ClassMethodSels.push_back((*iter)->getSelector()); 1898 std::string TypeStr; 1899 Context.getObjCEncodingForMethodDecl((*iter),TypeStr); 1900 ClassMethodTypes.push_back(MakeConstantString(TypeStr)); 1901 } 1902 // Collect the names of referenced protocols 1903 llvm::SmallVector<std::string, 16> Protocols; 1904 const ObjCList<ObjCProtocolDecl> &Protos =ClassDecl->getReferencedProtocols(); 1905 for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), 1906 E = Protos.end(); I != E; ++I) 1907 Protocols.push_back((*I)->getNameAsString()); 1908 1909 1910 1911 // Get the superclass pointer. 1912 llvm::Constant *SuperClass; 1913 if (!SuperClassName.empty()) { 1914 SuperClass = MakeConstantString(SuperClassName, ".super_class_name"); 1915 } else { 1916 SuperClass = llvm::ConstantPointerNull::get(PtrToInt8Ty); 1917 } 1918 // Empty vector used to construct empty method lists 1919 llvm::SmallVector<llvm::Constant*, 1> empty; 1920 // Generate the method and instance variable lists 1921 llvm::Constant *MethodList = GenerateMethodList(ClassName, "", 1922 InstanceMethodSels, InstanceMethodTypes, false); 1923 llvm::Constant *ClassMethodList = GenerateMethodList(ClassName, "", 1924 ClassMethodSels, ClassMethodTypes, true); 1925 llvm::Constant *IvarList = GenerateIvarList(IvarNames, IvarTypes, 1926 IvarOffsets); 1927 // Irrespective of whether we are compiling for a fragile or non-fragile ABI, 1928 // we emit a symbol containing the offset for each ivar in the class. This 1929 // allows code compiled for the non-Fragile ABI to inherit from code compiled 1930 // for the legacy ABI, without causing problems. The converse is also 1931 // possible, but causes all ivar accesses to be fragile. 1932 1933 // Offset pointer for getting at the correct field in the ivar list when 1934 // setting up the alias. These are: The base address for the global, the 1935 // ivar array (second field), the ivar in this list (set for each ivar), and 1936 // the offset (third field in ivar structure) 1937 const llvm::Type *IndexTy = llvm::Type::getInt32Ty(VMContext); 1938 llvm::Constant *offsetPointerIndexes[] = {Zeros[0], 1939 llvm::ConstantInt::get(IndexTy, 1), 0, 1940 llvm::ConstantInt::get(IndexTy, 2) }; 1941 1942 1943 for (unsigned i = 0, e = OIvars.size(); i != e; ++i) { 1944 ObjCIvarDecl *IVD = OIvars[i]; 1945 const std::string Name = "__objc_ivar_offset_" + ClassName + '.' 1946 + IVD->getNameAsString(); 1947 offsetPointerIndexes[2] = llvm::ConstantInt::get(IndexTy, i); 1948 // Get the correct ivar field 1949 llvm::Constant *offsetValue = llvm::ConstantExpr::getGetElementPtr( 1950 IvarList, offsetPointerIndexes, 4); 1951 // Get the existing variable, if one exists. 1952 llvm::GlobalVariable *offset = TheModule.getNamedGlobal(Name); 1953 if (offset) { 1954 offset->setInitializer(offsetValue); 1955 // If this is the real definition, change its linkage type so that 1956 // different modules will use this one, rather than their private 1957 // copy. 1958 offset->setLinkage(llvm::GlobalValue::ExternalLinkage); 1959 } else { 1960 // Add a new alias if there isn't one already. 1961 offset = new llvm::GlobalVariable(TheModule, offsetValue->getType(), 1962 false, llvm::GlobalValue::ExternalLinkage, offsetValue, Name); 1963 } 1964 } 1965 //Generate metaclass for class methods 1966 llvm::Constant *MetaClassStruct = GenerateClassStructure(NULLPtr, 1967 NULLPtr, 0x12L, ClassName.c_str(), 0, Zeros[0], GenerateIvarList( 1968 empty, empty, empty), ClassMethodList, NULLPtr, NULLPtr, NULLPtr, true); 1969 1970 // Generate the class structure 1971 llvm::Constant *ClassStruct = 1972 GenerateClassStructure(MetaClassStruct, SuperClass, 0x11L, 1973 ClassName.c_str(), 0, 1974 llvm::ConstantInt::get(LongTy, instanceSize), IvarList, 1975 MethodList, GenerateProtocolList(Protocols), IvarOffsetArray, 1976 Properties); 1977 1978 // Resolve the class aliases, if they exist. 1979 if (ClassPtrAlias) { 1980 ClassPtrAlias->replaceAllUsesWith( 1981 llvm::ConstantExpr::getBitCast(ClassStruct, IdTy)); 1982 ClassPtrAlias->eraseFromParent(); 1983 ClassPtrAlias = 0; 1984 } 1985 if (MetaClassPtrAlias) { 1986 MetaClassPtrAlias->replaceAllUsesWith( 1987 llvm::ConstantExpr::getBitCast(MetaClassStruct, IdTy)); 1988 MetaClassPtrAlias->eraseFromParent(); 1989 MetaClassPtrAlias = 0; 1990 } 1991 1992 // Add class structure to list to be added to the symtab later 1993 ClassStruct = llvm::ConstantExpr::getBitCast(ClassStruct, PtrToInt8Ty); 1994 Classes.push_back(ClassStruct); 1995} 1996 1997 1998llvm::Function *CGObjCGNU::ModuleInitFunction() { 1999 // Only emit an ObjC load function if no Objective-C stuff has been called 2000 if (Classes.empty() && Categories.empty() && ConstantStrings.empty() && 2001 ExistingProtocols.empty() && SelectorTable.empty()) 2002 return NULL; 2003 2004 // Add all referenced protocols to a category. 2005 GenerateProtocolHolderCategory(); 2006 2007 const llvm::StructType *SelStructTy = dyn_cast<llvm::StructType>( 2008 SelectorTy->getElementType()); 2009 const llvm::Type *SelStructPtrTy = SelectorTy; 2010 if (SelStructTy == 0) { 2011 SelStructTy = llvm::StructType::get(VMContext, PtrToInt8Ty, 2012 PtrToInt8Ty, NULL); 2013 SelStructPtrTy = llvm::PointerType::getUnqual(SelStructTy); 2014 } 2015 2016 // Name the ObjC types to make the IR a bit easier to read 2017 TheModule.addTypeName(".objc_selector", SelStructPtrTy); 2018 TheModule.addTypeName(".objc_id", IdTy); 2019 TheModule.addTypeName(".objc_imp", IMPTy); 2020 2021 std::vector<llvm::Constant*> Elements; 2022 llvm::Constant *Statics = NULLPtr; 2023 // Generate statics list: 2024 if (ConstantStrings.size()) { 2025 llvm::ArrayType *StaticsArrayTy = llvm::ArrayType::get(PtrToInt8Ty, 2026 ConstantStrings.size() + 1); 2027 ConstantStrings.push_back(NULLPtr); 2028 2029 llvm::StringRef StringClass = CGM.getLangOptions().ObjCConstantStringClass; 2030 2031 if (StringClass.empty()) StringClass = "NXConstantString"; 2032 2033 Elements.push_back(MakeConstantString(StringClass, 2034 ".objc_static_class_name")); 2035 Elements.push_back(llvm::ConstantArray::get(StaticsArrayTy, 2036 ConstantStrings)); 2037 llvm::StructType *StaticsListTy = 2038 llvm::StructType::get(VMContext, PtrToInt8Ty, StaticsArrayTy, NULL); 2039 llvm::Type *StaticsListPtrTy = 2040 llvm::PointerType::getUnqual(StaticsListTy); 2041 Statics = MakeGlobal(StaticsListTy, Elements, ".objc_statics"); 2042 llvm::ArrayType *StaticsListArrayTy = 2043 llvm::ArrayType::get(StaticsListPtrTy, 2); 2044 Elements.clear(); 2045 Elements.push_back(Statics); 2046 Elements.push_back(llvm::Constant::getNullValue(StaticsListPtrTy)); 2047 Statics = MakeGlobal(StaticsListArrayTy, Elements, ".objc_statics_ptr"); 2048 Statics = llvm::ConstantExpr::getBitCast(Statics, PtrTy); 2049 } 2050 // Array of classes, categories, and constant objects 2051 llvm::ArrayType *ClassListTy = llvm::ArrayType::get(PtrToInt8Ty, 2052 Classes.size() + Categories.size() + 2); 2053 llvm::StructType *SymTabTy = llvm::StructType::get(VMContext, 2054 LongTy, SelStructPtrTy, 2055 llvm::Type::getInt16Ty(VMContext), 2056 llvm::Type::getInt16Ty(VMContext), 2057 ClassListTy, NULL); 2058 2059 Elements.clear(); 2060 // Pointer to an array of selectors used in this module. 2061 std::vector<llvm::Constant*> Selectors; 2062 std::vector<llvm::GlobalAlias*> SelectorAliases; 2063 for (SelectorMap::iterator iter = SelectorTable.begin(), 2064 iterEnd = SelectorTable.end(); iter != iterEnd ; ++iter) { 2065 2066 std::string SelNameStr = iter->first.getAsString(); 2067 llvm::Constant *SelName = ExportUniqueString(SelNameStr, ".objc_sel_name"); 2068 2069 llvm::SmallVectorImpl<TypedSelector> &Types = iter->second; 2070 for (llvm::SmallVectorImpl<TypedSelector>::iterator i = Types.begin(), 2071 e = Types.end() ; i!=e ; i++) { 2072 2073 llvm::Constant *SelectorTypeEncoding = NULLPtr; 2074 if (!i->first.empty()) 2075 SelectorTypeEncoding = MakeConstantString(i->first, ".objc_sel_types"); 2076 2077 Elements.push_back(SelName); 2078 Elements.push_back(SelectorTypeEncoding); 2079 Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); 2080 Elements.clear(); 2081 2082 // Store the selector alias for later replacement 2083 SelectorAliases.push_back(i->second); 2084 } 2085 } 2086 unsigned SelectorCount = Selectors.size(); 2087 // NULL-terminate the selector list. This should not actually be required, 2088 // because the selector list has a length field. Unfortunately, the GCC 2089 // runtime decides to ignore the length field and expects a NULL terminator, 2090 // and GCC cooperates with this by always setting the length to 0. 2091 Elements.push_back(NULLPtr); 2092 Elements.push_back(NULLPtr); 2093 Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); 2094 Elements.clear(); 2095 2096 // Number of static selectors 2097 Elements.push_back(llvm::ConstantInt::get(LongTy, SelectorCount)); 2098 llvm::Constant *SelectorList = MakeGlobalArray(SelStructTy, Selectors, 2099 ".objc_selector_list"); 2100 Elements.push_back(llvm::ConstantExpr::getBitCast(SelectorList, 2101 SelStructPtrTy)); 2102 2103 // Now that all of the static selectors exist, create pointers to them. 2104 for (unsigned int i=0 ; i<SelectorCount ; i++) { 2105 2106 llvm::Constant *Idxs[] = {Zeros[0], 2107 llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), i), Zeros[0]}; 2108 // FIXME: We're generating redundant loads and stores here! 2109 llvm::Constant *SelPtr = llvm::ConstantExpr::getGetElementPtr(SelectorList, 2110 Idxs, 2); 2111 // If selectors are defined as an opaque type, cast the pointer to this 2112 // type. 2113 SelPtr = llvm::ConstantExpr::getBitCast(SelPtr, SelectorTy); 2114 SelectorAliases[i]->replaceAllUsesWith(SelPtr); 2115 SelectorAliases[i]->eraseFromParent(); 2116 } 2117 2118 // Number of classes defined. 2119 Elements.push_back(llvm::ConstantInt::get(llvm::Type::getInt16Ty(VMContext), 2120 Classes.size())); 2121 // Number of categories defined 2122 Elements.push_back(llvm::ConstantInt::get(llvm::Type::getInt16Ty(VMContext), 2123 Categories.size())); 2124 // Create an array of classes, then categories, then static object instances 2125 Classes.insert(Classes.end(), Categories.begin(), Categories.end()); 2126 // NULL-terminated list of static object instances (mainly constant strings) 2127 Classes.push_back(Statics); 2128 Classes.push_back(NULLPtr); 2129 llvm::Constant *ClassList = llvm::ConstantArray::get(ClassListTy, Classes); 2130 Elements.push_back(ClassList); 2131 // Construct the symbol table 2132 llvm::Constant *SymTab= MakeGlobal(SymTabTy, Elements); 2133 2134 // The symbol table is contained in a module which has some version-checking 2135 // constants 2136 llvm::StructType * ModuleTy = llvm::StructType::get(VMContext, LongTy, LongTy, 2137 PtrToInt8Ty, llvm::PointerType::getUnqual(SymTabTy), 2138 (CGM.getLangOptions().getGCMode() == LangOptions::NonGC) ? NULL : IntTy, 2139 NULL); 2140 Elements.clear(); 2141 // Runtime version, used for ABI compatibility checking. 2142 Elements.push_back(llvm::ConstantInt::get(LongTy, RuntimeVersion)); 2143 // sizeof(ModuleTy) 2144 llvm::TargetData td(&TheModule); 2145 Elements.push_back( 2146 llvm::ConstantInt::get(LongTy, 2147 td.getTypeSizeInBits(ModuleTy) / 2148 CGM.getContext().getCharWidth())); 2149 2150 // The path to the source file where this module was declared 2151 SourceManager &SM = CGM.getContext().getSourceManager(); 2152 const FileEntry *mainFile = SM.getFileEntryForID(SM.getMainFileID()); 2153 std::string path = 2154 std::string(mainFile->getDir()->getName()) + '/' + mainFile->getName(); 2155 Elements.push_back(MakeConstantString(path, ".objc_source_file_name")); 2156 Elements.push_back(SymTab); 2157 2158 switch (CGM.getLangOptions().getGCMode()) { 2159 case LangOptions::GCOnly: 2160 Elements.push_back(llvm::ConstantInt::get(IntTy, 2)); 2161 case LangOptions::NonGC: 2162 break; 2163 case LangOptions::HybridGC: 2164 Elements.push_back(llvm::ConstantInt::get(IntTy, 1)); 2165 } 2166 2167 llvm::Value *Module = MakeGlobal(ModuleTy, Elements); 2168 2169 // Create the load function calling the runtime entry point with the module 2170 // structure 2171 llvm::Function * LoadFunction = llvm::Function::Create( 2172 llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false), 2173 llvm::GlobalValue::InternalLinkage, ".objc_load_function", 2174 &TheModule); 2175 llvm::BasicBlock *EntryBB = 2176 llvm::BasicBlock::Create(VMContext, "entry", LoadFunction); 2177 CGBuilderTy Builder(VMContext); 2178 Builder.SetInsertPoint(EntryBB); 2179 2180 std::vector<const llvm::Type*> Params(1, 2181 llvm::PointerType::getUnqual(ModuleTy)); 2182 llvm::Value *Register = CGM.CreateRuntimeFunction(llvm::FunctionType::get( 2183 llvm::Type::getVoidTy(VMContext), Params, true), "__objc_exec_class"); 2184 Builder.CreateCall(Register, Module); 2185 Builder.CreateRetVoid(); 2186 2187 return LoadFunction; 2188} 2189 2190llvm::Function *CGObjCGNU::GenerateMethod(const ObjCMethodDecl *OMD, 2191 const ObjCContainerDecl *CD) { 2192 const ObjCCategoryImplDecl *OCD = 2193 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext()); 2194 llvm::StringRef CategoryName = OCD ? OCD->getName() : ""; 2195 llvm::StringRef ClassName = CD->getName(); 2196 Selector MethodName = OMD->getSelector(); 2197 bool isClassMethod = !OMD->isInstanceMethod(); 2198 2199 CodeGenTypes &Types = CGM.getTypes(); 2200 const llvm::FunctionType *MethodTy = 2201 Types.GetFunctionType(Types.getFunctionInfo(OMD), OMD->isVariadic()); 2202 std::string FunctionName = SymbolNameForMethod(ClassName, CategoryName, 2203 MethodName, isClassMethod); 2204 2205 llvm::Function *Method 2206 = llvm::Function::Create(MethodTy, 2207 llvm::GlobalValue::InternalLinkage, 2208 FunctionName, 2209 &TheModule); 2210 return Method; 2211} 2212 2213llvm::Function *CGObjCGNU::GetPropertyGetFunction() { 2214 return GetPropertyFn; 2215} 2216 2217llvm::Function *CGObjCGNU::GetPropertySetFunction() { 2218 return SetPropertyFn; 2219} 2220 2221llvm::Function *CGObjCGNU::GetGetStructFunction() { 2222 return GetStructPropertyFn; 2223} 2224llvm::Function *CGObjCGNU::GetSetStructFunction() { 2225 return SetStructPropertyFn; 2226} 2227 2228llvm::Constant *CGObjCGNU::EnumerationMutationFunction() { 2229 return EnumerationMutationFn; 2230} 2231 2232void CGObjCGNU::EmitSynchronizedStmt(CodeGenFunction &CGF, 2233 const ObjCAtSynchronizedStmt &S) { 2234 EmitAtSynchronizedStmt(CGF, S, SyncEnterFn, SyncExitFn); 2235} 2236 2237 2238void CGObjCGNU::EmitTryStmt(CodeGenFunction &CGF, 2239 const ObjCAtTryStmt &S) { 2240 // Unlike the Apple non-fragile runtimes, which also uses 2241 // unwind-based zero cost exceptions, the GNU Objective C runtime's 2242 // EH support isn't a veneer over C++ EH. Instead, exception 2243 // objects are created by __objc_exception_throw and destroyed by 2244 // the personality function; this avoids the need for bracketing 2245 // catch handlers with calls to __blah_begin_catch/__blah_end_catch 2246 // (or even _Unwind_DeleteException), but probably doesn't 2247 // interoperate very well with foreign exceptions. 2248 // 2249 // In Objective-C++ mode, we actually emit something equivalent to the C++ 2250 // exception handler. 2251 EmitTryCatchStmt(CGF, S, EnterCatchFn, ExitCatchFn, ExceptionReThrowFn); 2252 return ; 2253} 2254 2255void CGObjCGNU::EmitThrowStmt(CodeGenFunction &CGF, 2256 const ObjCAtThrowStmt &S) { 2257 llvm::Value *ExceptionAsObject; 2258 2259 if (const Expr *ThrowExpr = S.getThrowExpr()) { 2260 llvm::Value *Exception = CGF.EmitScalarExpr(ThrowExpr); 2261 ExceptionAsObject = Exception; 2262 } else { 2263 assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) && 2264 "Unexpected rethrow outside @catch block."); 2265 ExceptionAsObject = CGF.ObjCEHValueStack.back(); 2266 } 2267 ExceptionAsObject = 2268 CGF.Builder.CreateBitCast(ExceptionAsObject, IdTy, "tmp"); 2269 2270 // Note: This may have to be an invoke, if we want to support constructs like: 2271 // @try { 2272 // @throw(obj); 2273 // } 2274 // @catch(id) ... 2275 // 2276 // This is effectively turning @throw into an incredibly-expensive goto, but 2277 // it may happen as a result of inlining followed by missed optimizations, or 2278 // as a result of stupidity. 2279 llvm::BasicBlock *UnwindBB = CGF.getInvokeDest(); 2280 if (!UnwindBB) { 2281 CGF.Builder.CreateCall(ExceptionThrowFn, ExceptionAsObject); 2282 CGF.Builder.CreateUnreachable(); 2283 } else { 2284 CGF.Builder.CreateInvoke(ExceptionThrowFn, UnwindBB, UnwindBB, &ExceptionAsObject, 2285 &ExceptionAsObject+1); 2286 } 2287 // Clear the insertion point to indicate we are in unreachable code. 2288 CGF.Builder.ClearInsertionPoint(); 2289} 2290 2291llvm::Value * CGObjCGNU::EmitObjCWeakRead(CodeGenFunction &CGF, 2292 llvm::Value *AddrWeakObj) { 2293 CGBuilderTy B = CGF.Builder; 2294 AddrWeakObj = EnforceType(B, AddrWeakObj, IdTy); 2295 return B.CreateCall(WeakReadFn, AddrWeakObj); 2296} 2297 2298void CGObjCGNU::EmitObjCWeakAssign(CodeGenFunction &CGF, 2299 llvm::Value *src, llvm::Value *dst) { 2300 CGBuilderTy B = CGF.Builder; 2301 src = EnforceType(B, src, IdTy); 2302 dst = EnforceType(B, dst, PtrToIdTy); 2303 B.CreateCall2(WeakAssignFn, src, dst); 2304} 2305 2306void CGObjCGNU::EmitObjCGlobalAssign(CodeGenFunction &CGF, 2307 llvm::Value *src, llvm::Value *dst, 2308 bool threadlocal) { 2309 CGBuilderTy B = CGF.Builder; 2310 src = EnforceType(B, src, IdTy); 2311 dst = EnforceType(B, dst, PtrToIdTy); 2312 if (!threadlocal) 2313 B.CreateCall2(GlobalAssignFn, src, dst); 2314 else 2315 // FIXME. Add threadloca assign API 2316 assert(false && "EmitObjCGlobalAssign - Threal Local API NYI"); 2317} 2318 2319void CGObjCGNU::EmitObjCIvarAssign(CodeGenFunction &CGF, 2320 llvm::Value *src, llvm::Value *dst, 2321 llvm::Value *ivarOffset) { 2322 CGBuilderTy B = CGF.Builder; 2323 src = EnforceType(B, src, IdTy); 2324 dst = EnforceType(B, dst, PtrToIdTy); 2325 B.CreateCall3(IvarAssignFn, src, dst, ivarOffset); 2326} 2327 2328void CGObjCGNU::EmitObjCStrongCastAssign(CodeGenFunction &CGF, 2329 llvm::Value *src, llvm::Value *dst) { 2330 CGBuilderTy B = CGF.Builder; 2331 src = EnforceType(B, src, IdTy); 2332 dst = EnforceType(B, dst, PtrToIdTy); 2333 B.CreateCall2(StrongCastAssignFn, src, dst); 2334} 2335 2336void CGObjCGNU::EmitGCMemmoveCollectable(CodeGenFunction &CGF, 2337 llvm::Value *DestPtr, 2338 llvm::Value *SrcPtr, 2339 llvm::Value *Size) { 2340 CGBuilderTy B = CGF.Builder; 2341 DestPtr = EnforceType(B, DestPtr, IdTy); 2342 SrcPtr = EnforceType(B, SrcPtr, PtrToIdTy); 2343 2344 B.CreateCall3(MemMoveFn, DestPtr, SrcPtr, Size); 2345} 2346 2347llvm::GlobalVariable *CGObjCGNU::ObjCIvarOffsetVariable( 2348 const ObjCInterfaceDecl *ID, 2349 const ObjCIvarDecl *Ivar) { 2350 const std::string Name = "__objc_ivar_offset_" + ID->getNameAsString() 2351 + '.' + Ivar->getNameAsString(); 2352 // Emit the variable and initialize it with what we think the correct value 2353 // is. This allows code compiled with non-fragile ivars to work correctly 2354 // when linked against code which isn't (most of the time). 2355 llvm::GlobalVariable *IvarOffsetPointer = TheModule.getNamedGlobal(Name); 2356 if (!IvarOffsetPointer) { 2357 // This will cause a run-time crash if we accidentally use it. A value of 2358 // 0 would seem more sensible, but will silently overwrite the isa pointer 2359 // causing a great deal of confusion. 2360 uint64_t Offset = -1; 2361 // We can't call ComputeIvarBaseOffset() here if we have the 2362 // implementation, because it will create an invalid ASTRecordLayout object 2363 // that we are then stuck with forever, so we only initialize the ivar 2364 // offset variable with a guess if we only have the interface. The 2365 // initializer will be reset later anyway, when we are generating the class 2366 // description. 2367 if (!CGM.getContext().getObjCImplementation( 2368 const_cast<ObjCInterfaceDecl *>(ID))) 2369 Offset = ComputeIvarBaseOffset(CGM, ID, Ivar); 2370 2371 llvm::ConstantInt *OffsetGuess = 2372 llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), Offset, "ivar"); 2373 // Don't emit the guess in non-PIC code because the linker will not be able 2374 // to replace it with the real version for a library. In non-PIC code you 2375 // must compile with the fragile ABI if you want to use ivars from a 2376 // GCC-compiled class. 2377 if (CGM.getLangOptions().PICLevel) { 2378 llvm::GlobalVariable *IvarOffsetGV = new llvm::GlobalVariable(TheModule, 2379 llvm::Type::getInt32Ty(VMContext), false, 2380 llvm::GlobalValue::PrivateLinkage, OffsetGuess, Name+".guess"); 2381 IvarOffsetPointer = new llvm::GlobalVariable(TheModule, 2382 IvarOffsetGV->getType(), false, llvm::GlobalValue::LinkOnceAnyLinkage, 2383 IvarOffsetGV, Name); 2384 } else { 2385 IvarOffsetPointer = new llvm::GlobalVariable(TheModule, 2386 llvm::Type::getInt32PtrTy(VMContext), false, 2387 llvm::GlobalValue::ExternalLinkage, 0, Name); 2388 } 2389 } 2390 return IvarOffsetPointer; 2391} 2392 2393LValue CGObjCGNU::EmitObjCValueForIvar(CodeGenFunction &CGF, 2394 QualType ObjectTy, 2395 llvm::Value *BaseValue, 2396 const ObjCIvarDecl *Ivar, 2397 unsigned CVRQualifiers) { 2398 const ObjCInterfaceDecl *ID = 2399 ObjectTy->getAs<ObjCObjectType>()->getInterface(); 2400 return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers, 2401 EmitIvarOffset(CGF, ID, Ivar)); 2402} 2403 2404static const ObjCInterfaceDecl *FindIvarInterface(ASTContext &Context, 2405 const ObjCInterfaceDecl *OID, 2406 const ObjCIvarDecl *OIVD) { 2407 llvm::SmallVector<ObjCIvarDecl*, 16> Ivars; 2408 Context.ShallowCollectObjCIvars(OID, Ivars); 2409 for (unsigned k = 0, e = Ivars.size(); k != e; ++k) { 2410 if (OIVD == Ivars[k]) 2411 return OID; 2412 } 2413 2414 // Otherwise check in the super class. 2415 if (const ObjCInterfaceDecl *Super = OID->getSuperClass()) 2416 return FindIvarInterface(Context, Super, OIVD); 2417 2418 return 0; 2419} 2420 2421llvm::Value *CGObjCGNU::EmitIvarOffset(CodeGenFunction &CGF, 2422 const ObjCInterfaceDecl *Interface, 2423 const ObjCIvarDecl *Ivar) { 2424 if (CGM.getLangOptions().ObjCNonFragileABI) { 2425 Interface = FindIvarInterface(CGM.getContext(), Interface, Ivar); 2426 return CGF.Builder.CreateZExtOrBitCast( 2427 CGF.Builder.CreateLoad(CGF.Builder.CreateLoad( 2428 ObjCIvarOffsetVariable(Interface, Ivar), false, "ivar")), 2429 PtrDiffTy); 2430 } 2431 uint64_t Offset = ComputeIvarBaseOffset(CGF.CGM, Interface, Ivar); 2432 return llvm::ConstantInt::get(PtrDiffTy, Offset, "ivar"); 2433} 2434 2435CGObjCRuntime * 2436clang::CodeGen::CreateGNUObjCRuntime(CodeGenModule &CGM) { 2437 if (CGM.getLangOptions().ObjCNonFragileABI) 2438 return new CGObjCGNUstep(CGM); 2439 return new CGObjCGCC(CGM); 2440} 2441