CGObjCGNU.cpp revision 1d784b277cdfd4eba03680715d2a082b3f28d295
120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov//===------- CGObjCGNU.cpp - Emit LLVM Code from ASTs for a Module --------===// 20f984268b05edab2cc555a427c441baa9c252658Chris Lattner// 30f984268b05edab2cc555a427c441baa9c252658Chris Lattner// The LLVM Compiler Infrastructure 40f984268b05edab2cc555a427c441baa9c252658Chris Lattner// 50f984268b05edab2cc555a427c441baa9c252658Chris Lattner// This file is distributed under the University of Illinois Open Source 60f984268b05edab2cc555a427c441baa9c252658Chris Lattner// License. See LICENSE.TXT for details. 70f984268b05edab2cc555a427c441baa9c252658Chris Lattner// 80f984268b05edab2cc555a427c441baa9c252658Chris Lattner//===----------------------------------------------------------------------===// 90f984268b05edab2cc555a427c441baa9c252658Chris Lattner// 10fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner// This provides Objective-C code generation targeting the GNU runtime. The 1120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov// class in this file generates structures used by the GNU Objective-C runtime 1220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov// library. These structures are defined in objc/objc.h and objc/objc-api.h in 1320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov// the GNU runtime distribution. 140f984268b05edab2cc555a427c441baa9c252658Chris Lattner// 150f984268b05edab2cc555a427c441baa9c252658Chris Lattner//===----------------------------------------------------------------------===// 160f984268b05edab2cc555a427c441baa9c252658Chris Lattner 170f984268b05edab2cc555a427c441baa9c252658Chris Lattner#include "CGObjCRuntime.h" 18dce1406f1c1f572cfd61c494546572d63461c741Chris Lattner#include "CodeGenModule.h" 198f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar#include "CodeGenFunction.h" 2036f893c1efe367f929d92c8b125f964c22ba189eJohn McCall#include "CGCleanup.h" 215dc0867af17b3bd6f567897433853b2b4767446cChris Lattner 22dce1406f1c1f572cfd61c494546572d63461c741Chris Lattner#include "clang/AST/ASTContext.h" 23e91593ef084479340582b2ba177b44be50a717b7Daniel Dunbar#include "clang/AST/Decl.h" 24af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "clang/AST/DeclObjC.h" 2519cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 2616f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 279f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall#include "clang/Basic/SourceManager.h" 289f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall#include "clang/Basic/FileManager.h" 295dc0867af17b3bd6f567897433853b2b4767446cChris Lattner 305dc0867af17b3bd6f567897433853b2b4767446cChris Lattner#include "llvm/Intrinsics.h" 310f984268b05edab2cc555a427c441baa9c252658Chris Lattner#include "llvm/Module.h" 32c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall#include "llvm/LLVMContext.h" 330f984268b05edab2cc555a427c441baa9c252658Chris Lattner#include "llvm/ADT/SmallVector.h" 3420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/ADT/StringMap.h" 3580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall#include "llvm/Support/CallSite.h" 367ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar#include "llvm/Support/Compiler.h" 377ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar#include "llvm/Target/TargetData.h" 385dc0867af17b3bd6f567897433853b2b4767446cChris Lattner 395f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner#include <cstdarg> 40e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner 41e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner 42dce1406f1c1f572cfd61c494546572d63461c741Chris Lattnerusing namespace clang; 4346f45b9bec4a265ad8400a538e5ec3a5683617f1Daniel Dunbarusing namespace CodeGen; 4420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 450f984268b05edab2cc555a427c441baa9c252658Chris Lattner 460f984268b05edab2cc555a427c441baa9c252658Chris Lattnernamespace { 4781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// Class that lazily initialises the runtime function. Avoids inserting the 4881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// types and the function declaration into a module if they're not used, and 4981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// avoids constructing the type more than once if it's used more than once. 509f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallclass LazyRuntimeFunction { 519f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CodeGenModule *CGM; 529cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> ArgTys; 539f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall const char *FunctionName; 54789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall llvm::Constant *Function; 559f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall public: 5681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Constructor leaves this class uninitialized, because it is intended to 5781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// be used as a field in another class and not all of the types that are 5881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// used as arguments will necessarily be available at construction time. 599f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction() : CGM(0), FunctionName(0), Function(0) {} 609f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 6181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Initialises the lazy function with the name, return type, and the types 6281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// of the arguments. 639f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall END_WITH_NULL 649f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall void init(CodeGenModule *Mod, const char *name, 659cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *RetTy, ...) { 669f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CGM =Mod; 679f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall FunctionName = name; 689f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Function = 0; 699735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall ArgTys.clear(); 709f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall va_list Args; 719f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall va_start(Args, RetTy); 729cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner while (llvm::Type *ArgTy = va_arg(Args, llvm::Type*)) 739f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ArgTys.push_back(ArgTy); 749f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall va_end(Args); 759f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // Push the return type on at the end so we can pop it off easily 769f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ArgTys.push_back(RetTy); 779f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 7881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Overloaded cast operator, allows the class to be implicitly cast to an 7981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM constant. 80789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall operator llvm::Constant*() { 819f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall if (!Function) { 829735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall if (0 == FunctionName) return 0; 839735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // We put the return type on the end of the vector, so pop it back off 842acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *RetTy = ArgTys.back(); 859f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ArgTys.pop_back(); 869f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::FunctionType *FTy = llvm::FunctionType::get(RetTy, ArgTys, false); 879f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Function = 88789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall cast<llvm::Constant>(CGM->CreateRuntimeFunction(FTy, FunctionName)); 899735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // We won't need to use the types again, so we may as well clean up the 909735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // vector now 919f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ArgTys.resize(0); 929f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 939f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return Function; 949f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 95789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall operator llvm::Function*() { 965f0bcc4c3f4a75375a3571e71bffebf603f4ca67David Chisnall return cast<llvm::Function>((llvm::Constant*)*this); 97789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall } 985f0bcc4c3f4a75375a3571e71bffebf603f4ca67David Chisnall 999f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall}; 1009f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 1019f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 10281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// GNU Objective-C runtime code generation. This class implements the parts of 10381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// Objective-C support that are specific to the GNU family of runtimes (GCC and 10481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// GNUstep). 1059f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallclass CGObjCGNU : public CGObjCRuntime { 106c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnallprotected: 10781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The module that is using this class 1089f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CodeGenModule &CGM; 10981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The LLVM module into which output is inserted 1100f984268b05edab2cc555a427c441baa9c252658Chris Lattner llvm::Module &TheModule; 11181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// strut objc_super. Used for sending messages to super. This structure 11281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// contains the receiver (object) and the expected class. 1132acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *ObjCSuperTy; 11481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// struct objc_super*. The type of the argument to the superclass message 11581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// lookup functions. 1162acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PtrToObjCSuperTy; 11781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for selectors. Opaque pointer (i8*) unless a header declaring 11881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// SEL is included in a header somewhere, in which case it will be whatever 11981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// type is declared in that header, most likely {i8*, i8*}. 1209cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::PointerType *SelectorTy; 12181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM i8 type. Cached here to avoid repeatedly getting it in all of the 12281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// places where it's used 1232acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *Int8Ty; 12481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Pointer to i8 - LLVM type of char*, for all of the places where the 12581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// runtime needs to deal with C strings. 1269cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::PointerType *PtrToInt8Ty; 12781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Instance Method Pointer type. This is a pointer to a function that takes, 12881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// at a minimum, an object and a selector, and is the generic type for 12981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Objective-C methods. Due to differences between variadic / non-variadic 13081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// calling conventions, it must always be cast to the correct type before 13181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// actually being used. 1329cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::PointerType *IMPTy; 13381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Type of an untyped Objective-C object. Clang treats id as a built-in type 13481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// when compiling Objective-C code, so this may be an opaque pointer (i8*), 13581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// but if the runtime header declaring it is included then it may be a 13681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// pointer to a structure. 1379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::PointerType *IdTy; 13881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Pointer to a pointer to an Objective-C object. Used in the new ABI 13981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// message lookup function and some GC-related functions. 1402acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PtrToIdTy; 14181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The clang type of id. Used when using the clang CGCall infrastructure to 14281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// call Objective-C methods. 143ead608af31b6c9abeae1ca6d0b75094dac4641c0John McCall CanQualType ASTIdTy; 14481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for C int type. 1459cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::IntegerType *IntTy; 14681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for an opaque pointer. This is identical to PtrToInt8Ty, but is 14781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// used in the code to document the difference between i8* meaning a pointer 14881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// to a C string and i8* meaning a pointer to some opaque type. 1499cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::PointerType *PtrTy; 15081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for C long type. The runtime uses this in a lot of places where 15181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// it should be using intptr_t, but we can't fix this without breaking 15281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// compatibility with GCC... 153ef6de3da8572607f786303c07150daa6e140ab19Jay Foad llvm::IntegerType *LongTy; 15481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for C size_t. Used in various runtime data structures. 1552acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *SizeTy; 15649de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall /// LLVM type for C intptr_t. 15749de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall llvm::IntegerType *IntPtrTy; 15881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for C ptrdiff_t. Mainly used in property accessor functions. 1592acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::IntegerType *PtrDiffTy; 16081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for C int*. Used for GCC-ABI-compatible non-fragile instance 16181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// variables. 1622acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PtrToIntTy; 16381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM type for Objective-C BOOL type. 1642acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *BoolTy; 165917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// 32-bit integer type, to save us needing to look it up every time it's used. 166917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::IntegerType *Int32Ty; 167917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// 64-bit integer type, to save us needing to look it up every time it's used. 168917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::IntegerType *Int64Ty; 16981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Metadata kind used to tie method lookups to message sends. The GNUstep 17081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// runtime provides some LLVM passes that can use this to do things like 17181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// automatic IMP caching and speculative inlining. 172c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall unsigned msgSendMDKind; 17381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Helper function that generates a constant string and returns a pointer to 17481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// the start of the string. The result of this function can be used anywhere 17581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// where the C code specifies const char*. 1769735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *MakeConstantString(const std::string &Str, 1779735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall const std::string &Name="") { 1789735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *ConstStr = CGM.GetAddrOfConstantCString(Str, Name.c_str()); 179a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad return llvm::ConstantExpr::getGetElementPtr(ConstStr, Zeros); 1809735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 18181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Emits a linkonce_odr string, whose name is the prefix followed by the 18281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// string value. This allows the linker to combine the strings between 18381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// different modules. Used for EH typeinfo names, selector strings, and a 18481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// few other things. 1859735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *ExportUniqueString(const std::string &Str, 1869735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall const std::string prefix) { 1879735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall std::string name = prefix + Str; 1889735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *ConstStr = TheModule.getGlobalVariable(name); 1899735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall if (!ConstStr) { 1909735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *value = llvm::ConstantArray::get(VMContext, Str, true); 1919735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall ConstStr = new llvm::GlobalVariable(TheModule, value->getType(), true, 1929735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::GlobalValue::LinkOnceODRLinkage, value, prefix + Str); 1939735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 194a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad return llvm::ConstantExpr::getGetElementPtr(ConstStr, Zeros); 1959735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 19681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a global structure, initialized by the elements in the vector. 19781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The element types must match the types of the structure elements in the 19881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// first argument. 1992acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::GlobalVariable *MakeGlobal(llvm::StructType *Ty, 200917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ArrayRef<llvm::Constant*> V, 2015f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name="", 2029735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::GlobalValue::LinkageTypes linkage 2039735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall =llvm::GlobalValue::InternalLinkage) { 2049735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *C = llvm::ConstantStruct::get(Ty, V); 2059735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return new llvm::GlobalVariable(TheModule, Ty, false, 2069735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall linkage, C, Name); 2079735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 20881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a global array. The vector must contain the same number of 20981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// elements that the array type declares, of the type specified as the array 21081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// element type. 2112acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::GlobalVariable *MakeGlobal(llvm::ArrayType *Ty, 212917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ArrayRef<llvm::Constant*> V, 2135f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name="", 2149735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::GlobalValue::LinkageTypes linkage 2159735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall =llvm::GlobalValue::InternalLinkage) { 2169735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::Constant *C = llvm::ConstantArray::get(Ty, V); 2179735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return new llvm::GlobalVariable(TheModule, Ty, false, 2189735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall linkage, C, Name); 2199735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 22081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a global array, inferring the array type from the specified 22181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// element type and the size of the initialiser. 2222acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::GlobalVariable *MakeGlobalArray(llvm::Type *Ty, 223917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ArrayRef<llvm::Constant*> V, 2245f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name="", 2259735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::GlobalValue::LinkageTypes linkage 2269735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall =llvm::GlobalValue::InternalLinkage) { 2279735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall llvm::ArrayType *ArrayTy = llvm::ArrayType::get(Ty, V.size()); 2289735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return MakeGlobal(ArrayTy, V, Name, linkage); 2299735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 23081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Ensures that the value has the required type, by inserting a bitcast if 23181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// required. This function lets us avoid inserting bitcasts that are 23281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// redundant. 2332acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Value* EnforceType(CGBuilderTy B, llvm::Value *V, llvm::Type *Ty){ 234c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall if (V->getType() == Ty) return V; 235c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall return B.CreateBitCast(V, Ty); 236c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 237c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // Some zeros used for GEPs in lots of places. 238c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Constant *Zeros[2]; 23981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Null pointer value. Mainly used as a terminator in various arrays. 240c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Constant *NULLPtr; 24181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// LLVM context. 242c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::LLVMContext &VMContext; 243c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnallprivate: 24481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Placeholder for the class. Lots of things refer to the class before we've 24581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// actually emitted it. We use this alias as a placeholder, and then replace 24681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// it with a pointer to the class structure before finally emitting the 24781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// module. 2485efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar llvm::GlobalAlias *ClassPtrAlias; 24981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Placeholder for the metaclass. Lots of things refer to the class before 25081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// we've / actually emitted it. We use this alias as a placeholder, and then 25181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// replace / it with a pointer to the metaclass structure before finally 25281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// emitting the / module. 2535efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar llvm::GlobalAlias *MetaClassPtrAlias; 25481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// All of the classes that have been generated for this compilation units. 25520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Classes; 25681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// All of the categories that have been generated for this compilation units. 25720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Categories; 25881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// All of the Objective-C constant strings that have been generated for this 25981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// compilation units. 26020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> ConstantStrings; 26181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Map from string values to Objective-C constant strings in the output. 26281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Used to prevent emitting Objective-C strings more than once. This should 26381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// not be required at all - CodeGenModule should manage this list. 26448272a078e54d501cb05edd797c54b8e82ceb520David Chisnall llvm::StringMap<llvm::Constant*> ObjCStrings; 26581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// All of the protocols that have been declared. 26620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::StringMap<llvm::Constant*> ExistingProtocols; 26781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// For each variant of a selector, we store the type encoding and a 26881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// placeholder value. For an untyped selector, the type will be the empty 26981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// string. Selector references are all done via the module's selector table, 27081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// so we create an alias as a placeholder and then replace it with the real 27181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// value later. 2729f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall typedef std::pair<std::string, llvm::GlobalAlias*> TypedSelector; 27381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Type of the selector map. This is roughly equivalent to the structure 27481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// used in the GNUstep runtime, which maintains a list of all of the valid 27581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// types for a selector in a table. 2765f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef llvm::DenseMap<Selector, SmallVector<TypedSelector, 2> > 2779f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelectorMap; 27881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// A map from selectors to selector types. This allows us to emit all 27981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// selectors of the same name and type together. 2809f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelectorMap SelectorTable; 2819f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 28281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Selectors related to memory management. When compiling in GC mode, we 28381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// omit these. 284ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall Selector RetainSel, ReleaseSel, AutoreleaseSel; 28581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Runtime functions used for memory management in GC mode. Note that clang 28681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// supports code generation for calling these functions, but neither GNU 28781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// runtime actually supports this API properly yet. 2889f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction IvarAssignFn, StrongCastAssignFn, MemMoveFn, WeakReadFn, 2899f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall WeakAssignFn, GlobalAssignFn; 2909f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 2919735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnallprotected: 29281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function used for throwing Objective-C exceptions. 2939f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction ExceptionThrowFn; 29481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function used for rethrowing exceptions, used at the end of @finally or 29581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// @synchronize blocks. 2969735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall LazyRuntimeFunction ExceptionReThrowFn; 29781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function called when entering a catch function. This is required for 29881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// differentiating Objective-C exceptions and foreign exceptions. 2999735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall LazyRuntimeFunction EnterCatchFn; 30081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function called when exiting from a catch block. Used to do exception 30181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// cleanup. 3029735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall LazyRuntimeFunction ExitCatchFn; 30381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function called when entering an @synchronize block. Acquires the lock. 3049f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction SyncEnterFn; 30581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function called when exiting an @synchronize block. Releases the lock. 3069f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction SyncExitFn; 3079f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 3089735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnallprivate: 3099735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall 31081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function called if fast enumeration detects that the collection is 31181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// modified during the update. 3129f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction EnumerationMutationFn; 31381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function for implementing synthesized property getters that return an 31481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// object. 3159f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction GetPropertyFn; 31681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function for implementing synthesized property setters that return an 31781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// object. 3189f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction SetPropertyFn; 31981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function used for non-object declared property getters. 3209f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction GetStructPropertyFn; 32181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Function used for non-object declared property setters. 3229f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall LazyRuntimeFunction SetStructPropertyFn; 3239f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 32481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The version of the runtime that this class targets. Must match the 32581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// version in the runtime. 326a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall int RuntimeVersion; 32781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The version of the protocol class. Used to differentiate between ObjC1 32881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// and ObjC2 protocols. Objective-C 1 protocols can not contain optional 32981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// components and can not contain declared properties. We always emit 33081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Objective-C 2 property structures, but we have to pretend that they're 33181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Objective-C 1 property structures when targeting the GCC runtime or it 33281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// will abort. 3339f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall const int ProtocolVersion; 33420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikovprivate: 33581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates an instance variable list structure. This is a structure 33681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// containing a size and an array of structures containing instance variable 33781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// metadata. This is used purely for introspection in the fragile ABI. In 33881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// the non-fragile ABI, it's used for instance variable fixup. 33920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *GenerateIvarList( 3405f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &IvarNames, 3415f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &IvarTypes, 3425f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &IvarOffsets); 34381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a method list structure. This is a structure containing a size 34481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// and an array of structures containing method metadata. 34581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// 34681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// This structure is used by both classes and categories, and contains a next 34781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// pointer allowing them to be chained together in a linked list. 3485f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner llvm::Constant *GenerateMethodList(const StringRef &ClassName, 3495f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const StringRef &CategoryName, 3505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<Selector> &MethodSels, 3515f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &MethodTypes, 35220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov bool isClassMethodList); 35381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Emits an empty protocol. This is used for @protocol() where no protocol 35481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// is found. The runtime will (hopefully) fix up the pointer to refer to the 35581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// real protocol. 356f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian llvm::Constant *GenerateEmptyProtocol(const std::string &ProtocolName); 35781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a list of property metadata structures. This follows the same 35881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// pattern as method and instance variable metadata lists. 359d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *GeneratePropertyList(const ObjCImplementationDecl *OID, 3605f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<Selector> &InstanceMethodSels, 3615f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<llvm::Constant*> &InstanceMethodTypes); 36281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a list of referenced protocols. Classes, categories, and 36381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// protocols all use this structure. 36420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *GenerateProtocolList( 3655f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<std::string> &Protocols); 36681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// To ensure that all protocols are seen by the runtime, we add a category on 36781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// a class defined in the runtime, declaring no methods, but adopting the 36881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// protocols. This is a horribly ugly hack, but it allows us to collect all 36981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// of the protocols without changing the ABI. 370d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian void GenerateProtocolHolderCategory(void); 37181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a class structure. 37220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *GenerateClassStructure( 37320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *MetaClass, 37420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *SuperClass, 37520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov unsigned info, 376d002cc6fc5b72bf00e3b7b4571ccf0f23c789b4bChris Lattner const char *Name, 37720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *Version, 37820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *InstanceSize, 37920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *IVars, 38020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *Methods, 381d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *Protocols, 382d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *IvarOffsets, 3838c757f9ea33dccff4da7810e0c1bda59c19ddc9aDavid Chisnall llvm::Constant *Properties, 384917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *StrongIvarBitmap, 385917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *WeakIvarBitmap, 3868c757f9ea33dccff4da7810e0c1bda59c19ddc9aDavid Chisnall bool isMeta=false); 38781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Generates a method list. This is used by protocols to define the required 38881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// and optional methods. 38920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *GenerateProtocolMethodList( 3905f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &MethodNames, 3915f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &MethodTypes); 39281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Returns a selector with the specified type encoding. An empty string is 39381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// used to return an untyped selector (with the types field set to NULL). 3949f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel, 3959f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall const std::string &TypeEncoding, bool lval); 39681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Returns the variable used to store the offset of an instance variable. 3979cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian llvm::GlobalVariable *ObjCIvarOffsetVariable(const ObjCInterfaceDecl *ID, 3989cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian const ObjCIvarDecl *Ivar); 39981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Emits a reference to a class. This allows the linker to object if there 40081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// is no class of the matching name. 4012a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner void EmitClassRef(const std::string &className); 402c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall /// Emits a pointer to the named class 403d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall llvm::Value *GetClassNamed(CGBuilderTy &Builder, const std::string &Name, 404d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall bool isWeak); 405c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnallprotected: 40681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Looks up the method for sending a message to the specified object. This 40781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// mechanism differs between the GCC and GNU runtimes, so this method must be 40881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// overridden in subclasses. 409c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, 410c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *&Receiver, 411c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *cmd, 412c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::MDNode *node) = 0; 413917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// Looks up the method for sending a message to a superclass. This 414917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// mechanism differs between the GCC and GNU runtimes, so this method must 415917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// be overridden in subclasses. 416c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, 417c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *ObjCSuper, 418c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *cmd) = 0; 419917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// Libobjc2 uses a bitfield representation where small(ish) bitfields are 420917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// stored in a 64-bit value with the low bit set to 1 and the remaining 63 421917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// bits set to their values, LSB first, while larger ones are stored in a 422917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// structure of this / form: 423917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// 424917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// struct { int32_t length; int32_t values[length]; }; 425917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// 426917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// The values in the array are stored in host-endian format, with the least 427917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// significant bit being assumed to come first in the bitfield. Therefore, 428917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// a bitfield with the 64th bit set will be (int64_t)&{ 2, [0, 1<<31] }, 429917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall /// while a bitfield / with the 63rd bit set will be 1<<64. 430917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *MakeBitField(llvm::SmallVectorImpl<bool> &bits); 4310f984268b05edab2cc555a427c441baa9c252658Chris Lattnerpublic: 4329f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CGObjCGNU(CodeGenModule &cgm, unsigned runtimeABIVersion, 4339f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall unsigned protocolClassVersion); 4349f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 4350d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall virtual llvm::Constant *GenerateConstantString(const StringLiteral *); 4369f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 4379f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual RValue 4389f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall GenerateMessageSend(CodeGenFunction &CGF, 439ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot Return, 4407f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar QualType ResultType, 4417f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar Selector Sel, 442f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar llvm::Value *Receiver, 443df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian const CallArgList &CallArgs, 444c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall const ObjCInterfaceDecl *Class, 445df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian const ObjCMethodDecl *Method); 4469f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual RValue 4479f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall GenerateMessageSendSuper(CodeGenFunction &CGF, 448ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot Return, 4497f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar QualType ResultType, 4507f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar Selector Sel, 451f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar const ObjCInterfaceDecl *Class, 4527ce77920a35060f1c8dd72e541e42ce296ccd168Fariborz Jahanian bool isCategoryImpl, 453f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar llvm::Value *Receiver, 45419cd87eb5fb3c197e631ce08fd52c446c4d4e8f1Daniel Dunbar bool IsClassMessage, 455d6c93d703541c992e06eb9a59a2d826a30da65b2Daniel Dunbar const CallArgList &CallArgs, 456d6c93d703541c992e06eb9a59a2d826a30da65b2Daniel Dunbar const ObjCMethodDecl *Method); 45745d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar virtual llvm::Value *GetClass(CGBuilderTy &Builder, 458ddb2a3d55a24a1dbdf9152621642d9a4b4fc2f61Daniel Dunbar const ObjCInterfaceDecl *OID); 45903b2960c14aede6ac82bdef32247094ebb72fa69Fariborz Jahanian virtual llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel, 46003b2960c14aede6ac82bdef32247094ebb72fa69Fariborz Jahanian bool lval = false); 4616d5a1c28593443f3973ef38f8fa042d59182412dDaniel Dunbar virtual llvm::Value *GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl 4626d5a1c28593443f3973ef38f8fa042d59182412dDaniel Dunbar *Method); 463cf5abc7ba032bd35158e4d75b0bc92a482fc67e8Fariborz Jahanian virtual llvm::Constant *GetEHType(QualType T); 4641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump virtual llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD, 466679a502d462ef819e6175b58e255ca3f3391e7cfFariborz Jahanian const ObjCContainerDecl *CD); 4677ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar virtual void GenerateCategory(const ObjCCategoryImplDecl *CMD); 4687ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar virtual void GenerateClass(const ObjCImplementationDecl *ClassDecl); 46945d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar virtual llvm::Value *GenerateProtocolRef(CGBuilderTy &Builder, 470af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar const ObjCProtocolDecl *PD); 471af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar virtual void GenerateProtocol(const ObjCProtocolDecl *PD); 47220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov virtual llvm::Function *ModuleInitFunction(); 473789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall virtual llvm::Constant *GetPropertyGetFunction(); 474789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall virtual llvm::Constant *GetPropertySetFunction(); 475789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall virtual llvm::Constant *GetSetStructFunction(); 476789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnall virtual llvm::Constant *GetGetStructFunction(); 477309a4368cd299cff30ab22709e2b772cf8059e45Daniel Dunbar virtual llvm::Constant *EnumerationMutationFunction(); 4781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4799f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitTryStmt(CodeGenFunction &CGF, 480f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall const ObjCAtTryStmt &S); 4819f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitSynchronizedStmt(CodeGenFunction &CGF, 482f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall const ObjCAtSynchronizedStmt &S); 4839f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitThrowStmt(CodeGenFunction &CGF, 48464d5d6c5903157c521af496479d06dc26032d718Anders Carlsson const ObjCAtThrowStmt &S); 4859f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual llvm::Value * EmitObjCWeakRead(CodeGenFunction &CGF, 4866dc2317b59cb1180a59f6c283d96b7a5dfeb5307Fariborz Jahanian llvm::Value *AddrWeakObj); 4879f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitObjCWeakAssign(CodeGenFunction &CGF, 4883e283e344595e0bd499b13b30a92b7d9c10a2140Fariborz Jahanian llvm::Value *src, llvm::Value *dst); 4899f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitObjCGlobalAssign(CodeGenFunction &CGF, 490021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian llvm::Value *src, llvm::Value *dest, 491021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian bool threadlocal=false); 4929f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitObjCIvarAssign(CodeGenFunction &CGF, 4936c7a1f364796ce1acb988714e9e42076d1ce332eFariborz Jahanian llvm::Value *src, llvm::Value *dest, 4946c7a1f364796ce1acb988714e9e42076d1ce332eFariborz Jahanian llvm::Value *ivarOffset); 4959f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitObjCStrongCastAssign(CodeGenFunction &CGF, 49658626500527695865683d1d65053743de8770b60Fariborz Jahanian llvm::Value *src, llvm::Value *dest); 4979f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual void EmitGCMemmoveCollectable(CodeGenFunction &CGF, 4981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *DestPtr, 499082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian llvm::Value *SrcPtr, 50055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *Size); 5019f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual LValue EmitObjCValueForIvar(CodeGenFunction &CGF, 502598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian QualType ObjectTy, 503598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian llvm::Value *BaseValue, 504598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian const ObjCIvarDecl *Ivar, 505598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian unsigned CVRQualifiers); 5069f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual llvm::Value *EmitIvarOffset(CodeGenFunction &CGF, 5072a03192a02dbf4fdff438d1e658356bde871aba4Daniel Dunbar const ObjCInterfaceDecl *Interface, 508f63aa3fd429cdb9145d78f0b656bc78754efedb9Fariborz Jahanian const ObjCIvarDecl *Ivar); 509c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall virtual llvm::Value *EmitNSAutoreleasePoolClassRef(CGBuilderTy &Builder); 5109f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall virtual llvm::Constant *BuildGCBlockLayout(CodeGenModule &CGM, 5116b5a61b6dc400027fd793dcadceeb9da944a37eaJohn McCall const CGBlockInfo &blockInfo) { 51289ecd41e0a6bfb3b0913dbe41c3c666340b308c7Fariborz Jahanian return NULLPtr; 51389ecd41e0a6bfb3b0913dbe41c3c666340b308c7Fariborz Jahanian } 5146f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian 5156f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian virtual llvm::GlobalVariable *GetClassGlobal(const std::string &Name) { 5166f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian return 0; 5176f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian } 5180f984268b05edab2cc555a427c441baa9c252658Chris Lattner}; 51981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// Class representing the legacy GCC Objective-C ABI. This is the default when 52081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// -fobjc-nonfragile-abi is not specified. 52181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// 52281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// The GCC ABI target actually generates code that is approximately compatible 52381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// with the new GNUstep runtime ABI, but refrains from using any features that 52481a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// would not work with the GCC runtime. For example, clang always generates 52581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// the extended form of the class structure, and the extra fields are simply 52681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// ignored by GCC libobjc. 5279f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallclass CGObjCGCC : public CGObjCGNU { 52881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The GCC ABI message lookup function. Returns an IMP pointing to the 52981a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// method implementation for this message. 530c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall LazyRuntimeFunction MsgLookupFn; 53181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The GCC ABI superclass message lookup function. Takes a pointer to a 53281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// structure describing the receiver and the class, and a selector as 53381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// arguments. Returns the IMP for the corresponding method. 534c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall LazyRuntimeFunction MsgLookupSuperFn; 535c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnallprotected: 536c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, 537c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *&Receiver, 538c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *cmd, 539c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::MDNode *node) { 540c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CGBuilderTy &Builder = CGF.Builder; 5416f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall llvm::Value *args[] = { 542c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall EnforceType(Builder, Receiver, IdTy), 5436f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall EnforceType(Builder, cmd, SelectorTy) }; 5446f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall llvm::CallSite imp = CGF.EmitCallOrInvoke(MsgLookupFn, args); 5456f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall imp->setMetadata(msgSendMDKind, node); 5466f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall return imp.getInstruction(); 547c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 548c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, 549c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *ObjCSuper, 550c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *cmd) { 551c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CGBuilderTy &Builder = CGF.Builder; 552c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *lookupArgs[] = {EnforceType(Builder, ObjCSuper, 553c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall PtrToObjCSuperTy), cmd}; 5544c7d9f1507d0f102bd4133bba63348636facd469Jay Foad return Builder.CreateCall(MsgLookupSuperFn, lookupArgs); 555c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 5569f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall public: 557c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CGObjCGCC(CodeGenModule &Mod) : CGObjCGNU(Mod, 8, 2) { 558c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // IMP objc_msg_lookup(id, SEL); 559c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall MsgLookupFn.init(&CGM, "objc_msg_lookup", IMPTy, IdTy, SelectorTy, NULL); 560c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // IMP objc_msg_lookup_super(struct objc_super*, SEL); 561c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall MsgLookupSuperFn.init(&CGM, "objc_msg_lookup_super", IMPTy, 562c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall PtrToObjCSuperTy, SelectorTy, NULL); 563c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 5649f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall}; 56581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall/// Class used when targeting the new GNUstep runtime ABI. 5669f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallclass CGObjCGNUstep : public CGObjCGNU { 56781a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The slot lookup function. Returns a pointer to a cacheable structure 56881a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// that contains (among other things) the IMP. 569c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall LazyRuntimeFunction SlotLookupFn; 57081a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// The GNUstep ABI superclass message lookup function. Takes a pointer to 57181a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// a structure describing the receiver and the class, and a selector as 57281a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// arguments. Returns the slot for the corresponding method. Superclass 57381a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// message lookup rarely changes, so this is a good caching opportunity. 574c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall LazyRuntimeFunction SlotLookupSuperFn; 57581a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// Type of an slot structure pointer. This is returned by the various 57681a65f576842a1d02b1e3db21c14652c60a36448David Chisnall /// lookup functions. 577c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Type *SlotTy; 578c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall protected: 579c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, 580c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *&Receiver, 581c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *cmd, 582c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::MDNode *node) { 583c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CGBuilderTy &Builder = CGF.Builder; 584c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Function *LookupFn = SlotLookupFn; 585c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 586c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // Store the receiver on the stack so that we can reload it later 587c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *ReceiverPtr = CGF.CreateTempAlloca(Receiver->getType()); 588c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall Builder.CreateStore(Receiver, ReceiverPtr); 589c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 590c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *self; 591c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 592c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall if (isa<ObjCMethodDecl>(CGF.CurCodeDecl)) { 593c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall self = CGF.LoadObjCSelf(); 594c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } else { 595c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall self = llvm::ConstantPointerNull::get(IdTy); 596c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 597c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 598c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // The lookup function is guaranteed not to capture the receiver pointer. 599c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall LookupFn->setDoesNotCapture(1); 600c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 6016f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall llvm::Value *args[] = { 602c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall EnforceType(Builder, ReceiverPtr, PtrToIdTy), 603c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall EnforceType(Builder, cmd, SelectorTy), 6046f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall EnforceType(Builder, self, IdTy) }; 6056f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall llvm::CallSite slot = CGF.EmitCallOrInvoke(LookupFn, args); 6066f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall slot.setOnlyReadsMemory(); 607c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall slot->setMetadata(msgSendMDKind, node); 608c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 609c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // Load the imp from the slot 6106f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall llvm::Value *imp = 6116f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall Builder.CreateLoad(Builder.CreateStructGEP(slot.getInstruction(), 4)); 612c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 613c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // The lookup function may have changed the receiver, so make sure we use 614c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // the new one. 615c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall Receiver = Builder.CreateLoad(ReceiverPtr, true); 616c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall return imp; 617c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 618c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, 619c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *ObjCSuper, 620c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *cmd) { 621c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CGBuilderTy &Builder = CGF.Builder; 622c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *lookupArgs[] = {ObjCSuper, cmd}; 623c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 6244c7d9f1507d0f102bd4133bba63348636facd469Jay Foad llvm::CallInst *slot = Builder.CreateCall(SlotLookupSuperFn, lookupArgs); 625c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall slot->setOnlyReadsMemory(); 626c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 627c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall return Builder.CreateLoad(Builder.CreateStructGEP(slot, 4)); 628c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 6299f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall public: 630c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CGObjCGNUstep(CodeGenModule &Mod) : CGObjCGNU(Mod, 9, 3) { 6317650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *SlotStructTy = llvm::StructType::get(PtrTy, 632c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall PtrTy, PtrTy, IntTy, IMPTy, NULL); 633c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall SlotTy = llvm::PointerType::getUnqual(SlotStructTy); 634c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // Slot_t objc_msg_lookup_sender(id *receiver, SEL selector, id sender); 635c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall SlotLookupFn.init(&CGM, "objc_msg_lookup_sender", SlotTy, PtrToIdTy, 636c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall SelectorTy, IdTy, NULL); 637c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // Slot_t objc_msg_lookup_super(struct objc_super*, SEL); 638c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall SlotLookupSuperFn.init(&CGM, "objc_slot_lookup_super", SlotTy, 639c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall PtrToObjCSuperTy, SelectorTy, NULL); 6409735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // If we're in ObjC++ mode, then we want to make 6419735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall if (CGM.getLangOptions().CPlusPlus) { 6429cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); 6439735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // void *__cxa_begin_catch(void *e) 6449735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall EnterCatchFn.init(&CGM, "__cxa_begin_catch", PtrTy, PtrTy, NULL); 6459735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // void __cxa_end_catch(void) 6464bd5d09e3a233ed23ec6f913166e4b75d8de215cDavid Chisnall ExitCatchFn.init(&CGM, "__cxa_end_catch", VoidTy, NULL); 6479735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // void _Unwind_Resume_or_Rethrow(void*) 648978d415adab4ef423f5aef430ddfdbefc4cfb000David Chisnall ExceptionReThrowFn.init(&CGM, "_Unwind_Resume_or_Rethrow", VoidTy, PtrTy, NULL); 6499735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 650c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 6519f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall}; 6529f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 6530f984268b05edab2cc555a427c441baa9c252658Chris Lattner} // end anonymous namespace 6540f984268b05edab2cc555a427c441baa9c252658Chris Lattner 65520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 6562a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner/// Emits a reference to a dummy variable which is emitted with each class. 6572a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner/// This ensures that a linker error will be generated when trying to link 6582a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner/// together modules where a referenced class is not defined. 659bb1c8600218b3244340331165fc7cba7bf227655Mike Stumpvoid CGObjCGNU::EmitClassRef(const std::string &className) { 6602a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner std::string symbolRef = "__objc_class_ref_" + className; 6612a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner // Don't emit two copies of the same symbol 662bb1c8600218b3244340331165fc7cba7bf227655Mike Stump if (TheModule.getGlobalVariable(symbolRef)) 663bb1c8600218b3244340331165fc7cba7bf227655Mike Stump return; 6642a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner std::string symbolName = "__objc_class_name_" + className; 6652a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner llvm::GlobalVariable *ClassSymbol = TheModule.getGlobalVariable(symbolName); 6662a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner if (!ClassSymbol) { 6671c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson ClassSymbol = new llvm::GlobalVariable(TheModule, LongTy, false, 6681c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson llvm::GlobalValue::ExternalLinkage, 0, symbolName); 6692a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner } 6701c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, ClassSymbol->getType(), true, 671f35271b8677a5f31498b89587b1da42a06dd46fdChris Lattner llvm::GlobalValue::WeakAnyLinkage, ClassSymbol, symbolRef); 6722a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner} 67320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 6745f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerstatic std::string SymbolNameForMethod(const StringRef &ClassName, 6755f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const StringRef &CategoryName, const Selector MethodName, 6769f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall bool isClassMethod) { 6779f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall std::string MethodNameColonStripped = MethodName.getAsString(); 678d346736dfe5ef584a2d0c9d27d217408ee394b9bDavid Chisnall std::replace(MethodNameColonStripped.begin(), MethodNameColonStripped.end(), 679d346736dfe5ef584a2d0c9d27d217408ee394b9bDavid Chisnall ':', '_'); 6805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner return (Twine(isClassMethod ? "_c_" : "_i_") + ClassName + "_" + 6819f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CategoryName + "_" + MethodNameColonStripped).str(); 68287935a8d5c0eeda8ad62815f4fc815ad25c7cd8eDavid Chisnall} 68320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 6849f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallCGObjCGNU::CGObjCGNU(CodeGenModule &cgm, unsigned runtimeABIVersion, 6859f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall unsigned protocolClassVersion) 686c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall : CGM(cgm), TheModule(CGM.getModule()), VMContext(cgm.getLLVMContext()), 687c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall ClassPtrAlias(0), MetaClassPtrAlias(0), RuntimeVersion(runtimeABIVersion), 688c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall ProtocolVersion(protocolClassVersion) { 689c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall 690c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall msgSendMDKind = VMContext.getMDKindID("GNUObjCMessageSend"); 691c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall 6929f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CodeGenTypes &Types = CGM.getTypes(); 693e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner IntTy = cast<llvm::IntegerType>( 6949f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Types.ConvertType(CGM.getContext().IntTy)); 695e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner LongTy = cast<llvm::IntegerType>( 6969f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Types.ConvertType(CGM.getContext().LongTy)); 6978fac25d33b13e25f512dd921d4d5a4b565f5d175David Chisnall SizeTy = cast<llvm::IntegerType>( 6989f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Types.ConvertType(CGM.getContext().getSizeType())); 6998fac25d33b13e25f512dd921d4d5a4b565f5d175David Chisnall PtrDiffTy = cast<llvm::IntegerType>( 7009f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Types.ConvertType(CGM.getContext().getPointerDiffType())); 7018fac25d33b13e25f512dd921d4d5a4b565f5d175David Chisnall BoolTy = CGM.getTypes().ConvertType(CGM.getContext().BoolTy); 7021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 703d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Int8Ty = llvm::Type::getInt8Ty(VMContext); 704d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // C string type. Used in lots of places. 705d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrToInt8Ty = llvm::PointerType::getUnqual(Int8Ty); 706d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 7074a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Zeros[0] = llvm::ConstantInt::get(LongTy, 0); 70820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Zeros[1] = Zeros[0]; 709d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian NULLPtr = llvm::ConstantPointerNull::get(PtrToInt8Ty); 710391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner // Get the selector Type. 7110d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall QualType selTy = CGM.getContext().getObjCSelType(); 7120d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (QualType() == selTy) { 7130d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall SelectorTy = PtrToInt8Ty; 7140d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall } else { 7150d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall SelectorTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(selTy)); 7160d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall } 717e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner 71896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson PtrToIntTy = llvm::PointerType::getUnqual(IntTy); 719391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner PtrTy = PtrToInt8Ty; 7201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 721917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Int32Ty = llvm::Type::getInt32Ty(VMContext); 722917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Int64Ty = llvm::Type::getInt64Ty(VMContext); 723917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall 72449de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall IntPtrTy = 72549de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall TheModule.getPointerSize() == llvm::Module::Pointer32 ? Int32Ty : Int64Ty; 72649de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall 727391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner // Object type 7287bcf6c3e098e808282cc96309c02c08ab6229940David Chisnall QualType UnqualIdTy = CGM.getContext().getObjCIdType(); 7297bcf6c3e098e808282cc96309c02c08ab6229940David Chisnall ASTIdTy = CanQualType(); 7307bcf6c3e098e808282cc96309c02c08ab6229940David Chisnall if (UnqualIdTy != QualType()) { 7317bcf6c3e098e808282cc96309c02c08ab6229940David Chisnall ASTIdTy = CGM.getContext().getCanonicalType(UnqualIdTy); 7320d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy)); 7337bcf6c3e098e808282cc96309c02c08ab6229940David Chisnall } else { 7347bcf6c3e098e808282cc96309c02c08ab6229940David Chisnall IdTy = PtrToInt8Ty; 7350d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall } 736ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall PtrToIdTy = llvm::PointerType::getUnqual(IdTy); 7371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7387650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner ObjCSuperTy = llvm::StructType::get(IdTy, IdTy, NULL); 739c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall PtrToObjCSuperTy = llvm::PointerType::getUnqual(ObjCSuperTy); 740c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 7419cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); 7429f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 7439f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // void objc_exception_throw(id); 7449f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ExceptionThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy, NULL); 7459735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall ExceptionReThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy, NULL); 7469f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // int objc_sync_enter(id); 7479f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SyncEnterFn.init(&CGM, "objc_sync_enter", IntTy, IdTy, NULL); 7489f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // int objc_sync_exit(id); 7499f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SyncExitFn.init(&CGM, "objc_sync_exit", IntTy, IdTy, NULL); 7509f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 7519f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // void objc_enumerationMutation (id) 7529f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall EnumerationMutationFn.init(&CGM, "objc_enumerationMutation", VoidTy, 7539f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall IdTy, NULL); 7549f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 7559f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // id objc_getProperty(id, SEL, ptrdiff_t, BOOL) 7569f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall GetPropertyFn.init(&CGM, "objc_getProperty", IdTy, IdTy, SelectorTy, 7579f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall PtrDiffTy, BoolTy, NULL); 7589f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // void objc_setProperty(id, SEL, ptrdiff_t, id, BOOL, BOOL) 7599f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SetPropertyFn.init(&CGM, "objc_setProperty", VoidTy, IdTy, SelectorTy, 7609f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall PtrDiffTy, IdTy, BoolTy, BoolTy, NULL); 7619f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // void objc_setPropertyStruct(void*, void*, ptrdiff_t, BOOL, BOOL) 7629f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall GetStructPropertyFn.init(&CGM, "objc_getPropertyStruct", VoidTy, PtrTy, PtrTy, 7639f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall PtrDiffTy, BoolTy, BoolTy, NULL); 7649f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // void objc_setPropertyStruct(void*, void*, ptrdiff_t, BOOL, BOOL) 7659f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SetStructPropertyFn.init(&CGM, "objc_setPropertyStruct", VoidTy, PtrTy, PtrTy, 7669f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall PtrDiffTy, BoolTy, BoolTy, NULL); 7679f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 768391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner // IMP type 7699cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *IMPArgs[] = { IdTy, SelectorTy }; 770c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall IMPTy = llvm::PointerType::getUnqual(llvm::FunctionType::get(IdTy, IMPArgs, 771c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall true)); 772ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall 773f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall const LangOptions &Opts = CGM.getLangOptions(); 774e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if ((Opts.getGC() != LangOptions::NonGC) || Opts.ObjCAutoRefCount) 775f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall RuntimeVersion = 10; 776f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall 7779735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // Don't bother initialising the GC stuff unless we're compiling in GC mode 778e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (Opts.getGC() != LangOptions::NonGC) { 779a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall // This is a bit of an hack. We should sort this out by having a proper 780a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall // CGObjCGNUstep subclass for GC, but we may want to really support the old 781a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall // ABI and GC added in ObjectiveC2.framework, so we fudge it a bit for now 782ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // Get selectors needed in GC mode 783ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall RetainSel = GetNullarySelector("retain", CGM.getContext()); 784ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall ReleaseSel = GetNullarySelector("release", CGM.getContext()); 785ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall AutoreleaseSel = GetNullarySelector("autorelease", CGM.getContext()); 786ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall 787ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // Get functions needed in GC mode 788ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall 789ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // id objc_assign_ivar(id, id, ptrdiff_t); 7909f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall IvarAssignFn.init(&CGM, "objc_assign_ivar", IdTy, IdTy, IdTy, PtrDiffTy, 7919f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall NULL); 792ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // id objc_assign_strongCast (id, id*) 7939f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall StrongCastAssignFn.init(&CGM, "objc_assign_strongCast", IdTy, IdTy, 7949f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall PtrToIdTy, NULL); 795ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // id objc_assign_global(id, id*); 7969f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall GlobalAssignFn.init(&CGM, "objc_assign_global", IdTy, IdTy, PtrToIdTy, 7979f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall NULL); 798ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // id objc_assign_weak(id, id*); 7999f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall WeakAssignFn.init(&CGM, "objc_assign_weak", IdTy, IdTy, PtrToIdTy, NULL); 800ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // id objc_read_weak(id*); 8019f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall WeakReadFn.init(&CGM, "objc_read_weak", IdTy, PtrToIdTy, NULL); 802ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall // void *objc_memmove_collectable(void*, void *, size_t); 8039f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall MemMoveFn.init(&CGM, "objc_memmove_collectable", PtrTy, PtrTy, PtrTy, 8049f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SizeTy, NULL); 805ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 80620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 807bb1c8600218b3244340331165fc7cba7bf227655Mike Stump 808c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnallllvm::Value *CGObjCGNU::GetClassNamed(CGBuilderTy &Builder, 809d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall const std::string &Name, 810d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall bool isWeak) { 811c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall llvm::Value *ClassName = CGM.GetAddrOfConstantCString(Name); 81241d63ed274d1bf7ba7459f218c8f6a385fc5c6d6David Chisnall // With the incompatible ABI, this will need to be replaced with a direct 81341d63ed274d1bf7ba7459f218c8f6a385fc5c6d6David Chisnall // reference to the class symbol. For the compatible nonfragile ABI we are 81441d63ed274d1bf7ba7459f218c8f6a385fc5c6d6David Chisnall // still performing this lookup at run time but emitting the symbol for the 81541d63ed274d1bf7ba7459f218c8f6a385fc5c6d6David Chisnall // class externally so that we can make the switch later. 816c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall // 817c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall // Libobjc2 contains an LLVM pass that replaces calls to objc_lookup_class 818c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall // with memoized versions or with static references if it's safe to do so. 819d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall if (!isWeak) 820d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall EmitClassRef(Name); 821ddb2a3d55a24a1dbdf9152621642d9a4b4fc2f61Daniel Dunbar ClassName = Builder.CreateStructGEP(ClassName, 0); 822ddb2a3d55a24a1dbdf9152621642d9a4b4fc2f61Daniel Dunbar 82320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *ClassLookupFn = 824da549e8995c447542d5631b8b67fcc3a9582797aJay Foad CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, PtrToInt8Ty, true), 82526c8294dacc2efc83d8d560593ff863e7a32a48fFariborz Jahanian "objc_lookup_class"); 82620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return Builder.CreateCall(ClassLookupFn, ClassName); 827391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner} 828391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner 829c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall// This has to perform the lookup every time, since posing and related 830c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall// techniques can modify the name -> class mapping. 831c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnallllvm::Value *CGObjCGNU::GetClass(CGBuilderTy &Builder, 832c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall const ObjCInterfaceDecl *OID) { 833d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall return GetClassNamed(Builder, OID->getNameAsString(), OID->isWeakImported()); 834c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall} 835c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnallllvm::Value *CGObjCGNU::EmitNSAutoreleasePoolClassRef(CGBuilderTy &Builder) { 836d3fc7296ae95353173bae25ee4dd3ecf4d6dced1David Chisnall return GetClassNamed(Builder, "NSAutoreleasePool", false); 837c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall} 838c7aed3b9fbfbb6e85c234a4ba6f00cab1901f2f7David Chisnall 83903b2960c14aede6ac82bdef32247094ebb72fa69Fariborz Jahanianllvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, Selector Sel, 8409f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall const std::string &TypeEncoding, bool lval) { 8419f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 8425f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TypedSelector, 2> &Types = SelectorTable[Sel]; 8439f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::GlobalAlias *SelValue = 0; 8449f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 8459f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 8465f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner for (SmallVectorImpl<TypedSelector>::iterator i = Types.begin(), 8479f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall e = Types.end() ; i!=e ; i++) { 8489f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall if (i->first == TypeEncoding) { 8499f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelValue = i->second; 8509f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall break; 8519f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 8529f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 8539f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall if (0 == SelValue) { 854c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall SelValue = new llvm::GlobalAlias(SelectorTy, 8559f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::GlobalValue::PrivateLinkage, 8569f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ".objc_selector_"+Sel.getAsString(), NULL, 8579f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall &TheModule); 8589f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Types.push_back(TypedSelector(TypeEncoding, SelValue)); 8599f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 8609f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 861c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall if (lval) { 862c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *tmp = Builder.CreateAlloca(SelValue->getType()); 863c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall Builder.CreateStore(SelValue, tmp); 864c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall return tmp; 865c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall } 866c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall return SelValue; 8679f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall} 8689f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 8699f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallllvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, Selector Sel, 8709f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall bool lval) { 8719f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return GetSelector(Builder, Sel, std::string(), lval); 872df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian} 873df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian 8746d5a1c28593443f3973ef38f8fa042d59182412dDaniel Dunbarllvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl 875df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian *Method) { 876df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian std::string SelTypes; 877df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian CGM.getContext().getObjCEncodingForMethodDecl(Method, SelTypes); 8789f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return GetSelector(Builder, Method->getSelector(), SelTypes, false); 8798e67b63530b4f39a48bc12d97376f373a6901279Chris Lattner} 8808e67b63530b4f39a48bc12d97376f373a6901279Chris Lattner 881cf5abc7ba032bd35158e4d75b0bc92a482fc67e8Fariborz Jahanianllvm::Constant *CGObjCGNU::GetEHType(QualType T) { 8829735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall if (!CGM.getLangOptions().CPlusPlus) { 8839735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall if (T->isObjCIdType() 8849735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall || T->isObjCQualifiedIdType()) { 8859735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // With the old ABI, there was only one kind of catchall, which broke 8869735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // foreign exceptions. With the new ABI, we use __objc_id_typeinfo as 8879735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // a pointer indicating object catchalls, and NULL to indicate real 8889735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // catchalls 8899735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall if (CGM.getLangOptions().ObjCNonFragileABI) { 8909735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return MakeConstantString("@id"); 8919735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } else { 8929735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return 0; 8939735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 8949735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 8959735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall 8969735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // All other types should be Objective-C interface pointer types. 8979735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall const ObjCObjectPointerType *OPT = 8989735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall T->getAs<ObjCObjectPointerType>(); 8999735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall assert(OPT && "Invalid @catch type."); 9009735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall const ObjCInterfaceDecl *IDecl = 9019735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall OPT->getObjectType()->getInterface(); 9029735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall assert(IDecl && "Invalid @catch type."); 9039735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return MakeConstantString(IDecl->getIdentifier()->getName()); 9049735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall } 90580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // For Objective-C++, we want to provide the ability to catch both C++ and 90680558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // Objective-C objects in the same function. 90780558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 90880558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // There's a particular fixed type info for 'id'. 90980558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall if (T->isObjCIdType() || 91080558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall T->isObjCQualifiedIdType()) { 91180558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::Constant *IDEHType = 91280558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall CGM.getModule().getGlobalVariable("__objc_id_type_info"); 91380558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall if (!IDEHType) 91480558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall IDEHType = 91580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall new llvm::GlobalVariable(CGM.getModule(), PtrToInt8Ty, 91680558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall false, 91780558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::GlobalValue::ExternalLinkage, 91880558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 0, "__objc_id_type_info"); 91980558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall return llvm::ConstantExpr::getBitCast(IDEHType, PtrToInt8Ty); 92080558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall } 92180558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 92280558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall const ObjCObjectPointerType *PT = 92380558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall T->getAs<ObjCObjectPointerType>(); 92480558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall assert(PT && "Invalid @catch type."); 92580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall const ObjCInterfaceType *IT = PT->getInterfaceType(); 92680558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall assert(IT && "Invalid @catch type."); 92780558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall std::string className = IT->getDecl()->getIdentifier()->getName(); 92880558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 92980558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall std::string typeinfoName = "__objc_eh_typeinfo_" + className; 93080558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 93180558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // Return the existing typeinfo if it exists 93280558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::Constant *typeinfo = TheModule.getGlobalVariable(typeinfoName); 93380558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall if (typeinfo) return typeinfo; 93480558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 93580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // Otherwise create it. 93680558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 93780558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // vtable for gnustep::libobjc::__objc_class_type_info 93880558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // It's quite ugly hard-coding this. Ideally we'd generate it using the host 93980558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // platform's name mangling. 94080558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall const char *vtableName = "_ZTVN7gnustep7libobjc22__objc_class_type_infoE"; 94180558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::Constant *Vtable = TheModule.getGlobalVariable(vtableName); 94280558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall if (!Vtable) { 94380558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall Vtable = new llvm::GlobalVariable(TheModule, PtrToInt8Ty, true, 94480558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::GlobalValue::ExternalLinkage, 0, vtableName); 94580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall } 94680558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::Constant *Two = llvm::ConstantInt::get(IntTy, 2); 947a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Vtable = llvm::ConstantExpr::getGetElementPtr(Vtable, Two); 94880558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall Vtable = llvm::ConstantExpr::getBitCast(Vtable, PtrToInt8Ty); 94980558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 95080558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::Constant *typeName = 95180558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall ExportUniqueString(className, "__objc_eh_typename_"); 95280558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall 95380558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall std::vector<llvm::Constant*> fields; 95480558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall fields.push_back(Vtable); 95580558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall fields.push_back(typeName); 95680558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::Constant *TI = 9577650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, 95880558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall NULL), fields, "__objc_eh_typeinfo_" + className, 95980558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall llvm::GlobalValue::LinkOnceODRLinkage); 96080558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall return llvm::ConstantExpr::getBitCast(TI, PtrToInt8Ty); 9615a180397870944548aaadeaebf58e415885b9489John McCall} 9625a180397870944548aaadeaebf58e415885b9489John McCall 96320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov/// Generate an NSConstantString object. 9640d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallllvm::Constant *CGObjCGNU::GenerateConstantString(const StringLiteral *SL) { 96548272a078e54d501cb05edd797c54b8e82ceb520David Chisnall 9662f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = SL->getString().str(); 9670d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 96848272a078e54d501cb05edd797c54b8e82ceb520David Chisnall // Look for an existing one 96948272a078e54d501cb05edd797c54b8e82ceb520David Chisnall llvm::StringMap<llvm::Constant*>::iterator old = ObjCStrings.find(Str); 97048272a078e54d501cb05edd797c54b8e82ceb520David Chisnall if (old != ObjCStrings.end()) 97148272a078e54d501cb05edd797c54b8e82ceb520David Chisnall return old->getValue(); 97248272a078e54d501cb05edd797c54b8e82ceb520David Chisnall 97320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Ivars; 97420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Ivars.push_back(NULLPtr); 97513fd7e5111032f54b538dd66d035b0ccc1f82467Chris Lattner Ivars.push_back(MakeConstantString(Str)); 9764a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Ivars.push_back(llvm::ConstantInt::get(IntTy, Str.size())); 97720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *ObjCStr = MakeGlobal( 9787650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, IntTy, NULL), 97920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Ivars, ".objc_str"); 98048272a078e54d501cb05edd797c54b8e82ceb520David Chisnall ObjCStr = llvm::ConstantExpr::getBitCast(ObjCStr, PtrToInt8Ty); 98148272a078e54d501cb05edd797c54b8e82ceb520David Chisnall ObjCStrings[Str] = ObjCStr; 98248272a078e54d501cb05edd797c54b8e82ceb520David Chisnall ConstantStrings.push_back(ObjCStr); 98320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return ObjCStr; 98420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 98520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 98620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov///Generates a message send where the super is the receiver. This is a message 98720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov///send to self with special delivery semantics indicating which class's method 98820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov///should be called. 9899f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallRValue 9909f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallCGObjCGNU::GenerateMessageSendSuper(CodeGenFunction &CGF, 991ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot Return, 9927f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar QualType ResultType, 9937f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar Selector Sel, 994f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar const ObjCInterfaceDecl *Class, 9957ce77920a35060f1c8dd72e541e42ce296ccd168Fariborz Jahanian bool isCategoryImpl, 996f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar llvm::Value *Receiver, 99719cd87eb5fb3c197e631ce08fd52c446c4d4e8f1Daniel Dunbar bool IsClassMessage, 998d6c93d703541c992e06eb9a59a2d826a30da65b2Daniel Dunbar const CallArgList &CallArgs, 999d6c93d703541c992e06eb9a59a2d826a30da65b2Daniel Dunbar const ObjCMethodDecl *Method) { 10000bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall CGBuilderTy &Builder = CGF.Builder; 1001e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (CGM.getLangOptions().getGC() == LangOptions::GCOnly) { 1002ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall if (Sel == RetainSel || Sel == AutoreleaseSel) { 10030bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall return RValue::get(EnforceType(Builder, Receiver, 10040bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall CGM.getTypes().ConvertType(ResultType))); 1005ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 1006ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall if (Sel == ReleaseSel) { 1007ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall return RValue::get(0); 1008ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 1009ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 1010db831948f32217ece8410099f9982ef900c3b3c3David Chisnall 1011db831948f32217ece8410099f9982ef900c3b3c3David Chisnall llvm::Value *cmd = GetSelector(Builder, Sel); 1012db831948f32217ece8410099f9982ef900c3b3c3David Chisnall 1013b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian 1014b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian CallArgList ActualArgs; 1015b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian 101604c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman ActualArgs.add(RValue::get(EnforceType(Builder, Receiver, IdTy)), ASTIdTy); 101704c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman ActualArgs.add(RValue::get(cmd), CGF.getContext().getObjCSelType()); 1018f85e193739c953358c865005855253af4f68a497John McCall ActualArgs.addFrom(CallArgs); 1019b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian 1020b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian CodeGenTypes &Types = CGM.getTypes(); 102104a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs, 1022264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola FunctionType::ExtInfo()); 1023b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian 10245efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar llvm::Value *ReceiverClass = 0; 102548e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner if (isCategoryImpl) { 102648e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner llvm::Constant *classLookupFunction = 0; 102748e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner if (IsClassMessage) { 102896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( 1029da549e8995c447542d5631b8b67fcc3a9582797aJay Foad IdTy, PtrTy, true), "objc_get_meta_class"); 103048e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner } else { 103196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( 1032da549e8995c447542d5631b8b67fcc3a9582797aJay Foad IdTy, PtrTy, true), "objc_get_class"); 10335efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar } 1034db831948f32217ece8410099f9982ef900c3b3c3David Chisnall ReceiverClass = Builder.CreateCall(classLookupFunction, 103548e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner MakeConstantString(Class->getNameAsString())); 10365efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar } else { 103748e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner // Set up global aliases for the metaclass or class pointer if they do not 103848e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner // already exist. These will are forward-references which will be set to 1039bb1c8600218b3244340331165fc7cba7bf227655Mike Stump // pointers to the class and metaclass structure created for the runtime 1040bb1c8600218b3244340331165fc7cba7bf227655Mike Stump // load function. To send a message to super, we look up the value of the 104148e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner // super_class pointer from either the class or metaclass structure. 104248e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner if (IsClassMessage) { 104348e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner if (!MetaClassPtrAlias) { 104448e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner MetaClassPtrAlias = new llvm::GlobalAlias(IdTy, 104548e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner llvm::GlobalValue::InternalLinkage, ".objc_metaclass_ref" + 104648e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner Class->getNameAsString(), NULL, &TheModule); 104748e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner } 104848e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner ReceiverClass = MetaClassPtrAlias; 104948e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner } else { 105048e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner if (!ClassPtrAlias) { 105148e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner ClassPtrAlias = new llvm::GlobalAlias(IdTy, 105248e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner llvm::GlobalValue::InternalLinkage, ".objc_class_ref" + 105348e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner Class->getNameAsString(), NULL, &TheModule); 105448e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner } 105548e6e7e8106f2404bfdd2d8abe7a840aeeaf047bChris Lattner ReceiverClass = ClassPtrAlias; 10565efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar } 105771238f67c5df13eef19450d66b7a7ab28377192aChris Lattner } 10585efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar // Cast the pointer to a simplified version of the class structure 1059db831948f32217ece8410099f9982ef900c3b3c3David Chisnall ReceiverClass = Builder.CreateBitCast(ReceiverClass, 106096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual( 10617650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(IdTy, IdTy, NULL))); 10625efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar // Get the superclass pointer 1063db831948f32217ece8410099f9982ef900c3b3c3David Chisnall ReceiverClass = Builder.CreateStructGEP(ReceiverClass, 1); 10645efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar // Load the superclass pointer 1065db831948f32217ece8410099f9982ef900c3b3c3David Chisnall ReceiverClass = Builder.CreateLoad(ReceiverClass); 106620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Construct the structure used to look up the IMP 10677650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ObjCSuperTy = llvm::StructType::get( 106847a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson Receiver->getType(), IdTy, NULL); 1069db831948f32217ece8410099f9982ef900c3b3c3David Chisnall llvm::Value *ObjCSuper = Builder.CreateAlloca(ObjCSuperTy); 1070b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian 1071db831948f32217ece8410099f9982ef900c3b3c3David Chisnall Builder.CreateStore(Receiver, Builder.CreateStructGEP(ObjCSuper, 0)); 1072db831948f32217ece8410099f9982ef900c3b3c3David Chisnall Builder.CreateStore(ReceiverClass, Builder.CreateStructGEP(ObjCSuper, 1)); 107320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 1074c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall ObjCSuper = EnforceType(Builder, ObjCSuper, PtrToObjCSuperTy); 10752acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *impType = 1076c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall Types.GetFunctionType(FnInfo, Method ? Method->isVariadic() : false); 1077db831948f32217ece8410099f9982ef900c3b3c3David Chisnall 1078c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // Get the IMP 1079c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *imp = LookupIMPSuper(CGF, ObjCSuper, cmd); 1080c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall imp = EnforceType(Builder, imp, llvm::PointerType::getUnqual(impType)); 108120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 1082dd5c98f709837e5dd3da08d44d1ce407975df2cfDavid Chisnall llvm::Value *impMD[] = { 1083dd5c98f709837e5dd3da08d44d1ce407975df2cfDavid Chisnall llvm::MDString::get(VMContext, Sel.getAsString()), 1084dd5c98f709837e5dd3da08d44d1ce407975df2cfDavid Chisnall llvm::MDString::get(VMContext, Class->getSuperClass()->getNameAsString()), 1085dd5c98f709837e5dd3da08d44d1ce407975df2cfDavid Chisnall llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext), IsClassMessage) 1086dd5c98f709837e5dd3da08d44d1ce407975df2cfDavid Chisnall }; 10876f141659cab11109d9931d92d0988f8850778de3Jay Foad llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD); 1088dd5c98f709837e5dd3da08d44d1ce407975df2cfDavid Chisnall 10894b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall llvm::Instruction *call; 1090ef072fd2f3347cfd857d6eb787b245b950771430John McCall RValue msgRet = CGF.EmitCall(FnInfo, imp, Return, ActualArgs, 10914b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall 0, &call); 10924b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall call->setMetadata(msgSendMDKind, node); 10934b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall return msgRet; 109420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 109520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 10961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// Generate code for a message send expression. 10979f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallRValue 10989f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallCGObjCGNU::GenerateMessageSend(CodeGenFunction &CGF, 1099ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot Return, 11007f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar QualType ResultType, 11017f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar Selector Sel, 1102f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar llvm::Value *Receiver, 1103df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian const CallArgList &CallArgs, 1104c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall const ObjCInterfaceDecl *Class, 1105df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian const ObjCMethodDecl *Method) { 11060bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall CGBuilderTy &Builder = CGF.Builder; 11070bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall 1108664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // Strip out message sends to retain / release in GC mode 1109e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (CGM.getLangOptions().getGC() == LangOptions::GCOnly) { 1110ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall if (Sel == RetainSel || Sel == AutoreleaseSel) { 11110bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall return RValue::get(EnforceType(Builder, Receiver, 11120bbe0cfd374d0e564c4570b5e84a77f886c32d52David Chisnall CGM.getTypes().ConvertType(ResultType))); 1113ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 1114ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall if (Sel == ReleaseSel) { 1115ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall return RValue::get(0); 1116ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 1117ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall } 1118664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall 1119664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // If the return type is something that goes in an integer register, the 1120664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // runtime will handle 0 returns. For other cases, we fill in the 0 value 1121664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // ourselves. 1122664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // 1123664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // The language spec says the result of this kind of message send is 1124664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // undefined, but lots of people seem to have forgotten to read that 1125664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // paragraph and insist on sending messages to nil that have structure 1126664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // returns. With GCC, this generates a random return value (whatever happens 1127664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall // to be on the stack / in those registers at the time) on most platforms, 1128c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // and generates an illegal instruction trap on SPARC. With LLVM it corrupts 1129c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall // the stack. 1130c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall bool isPointerSizedReturn = (ResultType->isAnyPointerType() || 1131c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall ResultType->isIntegralOrEnumerationType() || ResultType->isVoidType()); 1132664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall 1133664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::BasicBlock *startBB = 0; 1134664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::BasicBlock *messageBB = 0; 1135a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall llvm::BasicBlock *continueBB = 0; 1136664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall 1137664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall if (!isPointerSizedReturn) { 1138664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall startBB = Builder.GetInsertBlock(); 1139664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall messageBB = CGF.createBasicBlock("msgSend"); 1140a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall continueBB = CGF.createBasicBlock("continue"); 1141664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall 1142664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::Value *isNil = Builder.CreateICmpEQ(Receiver, 1143664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::Constant::getNullValue(Receiver->getType())); 1144a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall Builder.CreateCondBr(isNil, continueBB, messageBB); 1145664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall CGF.EmitBlock(messageBB); 1146664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall } 1147664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall 11480f436560640a1cff5b6d96f80f540770f139453fDavid Chisnall IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy)); 1149df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian llvm::Value *cmd; 1150df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian if (Method) 1151d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian cmd = GetSelector(Builder, Method); 1152df9ccc6381314ccca6407abb209155e9273a631dFariborz Jahanian else 1153d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian cmd = GetSelector(Builder, Sel); 1154c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall cmd = EnforceType(Builder, cmd, SelectorTy); 1155c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall Receiver = EnforceType(Builder, Receiver, IdTy); 1156c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall 1157c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Value *impMD[] = { 1158c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::MDString::get(VMContext, Sel.getAsString()), 1159c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::MDString::get(VMContext, Class ? Class->getNameAsString() :""), 1160c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::ConstantInt::get(llvm::Type::getInt1Ty(VMContext), Class!=0) 1161c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall }; 11626f141659cab11109d9931d92d0988f8850778de3Jay Foad llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD); 1163b3716efb0966620f205c939b671b579ad331ca0dFariborz Jahanian 116489c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall CodeGenTypes &Types = CGM.getTypes(); 1165c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall CallArgList ActualArgs; 116604c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman ActualArgs.add(RValue::get(Receiver), ASTIdTy); 116704c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman ActualArgs.add(RValue::get(cmd), CGF.getContext().getObjCSelType()); 1168f85e193739c953358c865005855253af4f68a497John McCall ActualArgs.addFrom(CallArgs); 116904a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs, 1170264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola FunctionType::ExtInfo()); 117189c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall // Get the IMP to call 117289c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall llvm::Value *imp; 117389c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall 117489c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall // If we have non-legacy dispatch specified, we try using the objc_msgSend() 117589c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall // functions. These are not supported on all platforms (or all runtimes on a 117689c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall // given platform), so we 117789c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall switch (CGM.getCodeGenOpts().getObjCDispatchMethod()) { 117889c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall default: 117989c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall llvm_unreachable("Invalid dispatch method!"); 118089c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall case CodeGenOptions::Legacy: 118189c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall imp = LookupIMP(CGF, Receiver, cmd, node); 118289c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall break; 118389c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall case CodeGenOptions::Mixed: 118489c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall case CodeGenOptions::NonLegacy: 11856f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall if (CGM.ReturnTypeUsesFPRet(ResultType)) { 11866f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true), 11876f3887ec3652482d2e0e8959d8a89b785330b0b2David Chisnall "objc_msgSend_fpret"); 118889c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall } else if (CGM.ReturnTypeUsesSRet(FnInfo)) { 118989c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall // The actual types here don't matter - we're going to bitcast the 119089c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall // function anyway 119189c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true), 119289c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall "objc_msgSend_stret"); 119389c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall } else { 119489c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true), 119589c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall "objc_msgSend"); 119689c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall } 119789c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall } 119889c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall 1199403bc3f85f3b3461b73abdd9c632980bf95f34bdDavid Chisnall // Reset the receiver in case the lookup modified it 1200403bc3f85f3b3461b73abdd9c632980bf95f34bdDavid Chisnall ActualArgs[0] = CallArg(RValue::get(Receiver), ASTIdTy, false); 120189c300400b0b75d879da88f81c97a46feb0675beDavid Chisnall 12022acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *impType = 12036793966aa221764f579cc8436bd641e1ec339c6dDaniel Dunbar Types.GetFunctionType(FnInfo, Method ? Method->isVariadic() : false); 1204c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall imp = EnforceType(Builder, imp, llvm::PointerType::getUnqual(impType)); 120563e742bed90aab2e8e778e48fbbd4bce766b4373David Chisnall 12064b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall llvm::Instruction *call; 1207ef072fd2f3347cfd857d6eb787b245b950771430John McCall RValue msgRet = CGF.EmitCall(FnInfo, imp, Return, ActualArgs, 12084b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall 0, &call); 12094b02afcb45cd1a384de7d45f440a8be091dd500bDavid Chisnall call->setMetadata(msgSendMDKind, node); 1210664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall 1211a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall 1212664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall if (!isPointerSizedReturn) { 1213a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall messageBB = CGF.Builder.GetInsertBlock(); 1214a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall CGF.Builder.CreateBr(continueBB); 1215a54da05098aff1ca992f5292f3f6a39ec3cef31eDavid Chisnall CGF.EmitBlock(continueBB); 1216664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall if (msgRet.isScalar()) { 1217664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::Value *v = msgRet.getScalarVal(); 1218bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *phi = Builder.CreatePHI(v->getType(), 2); 1219664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi->addIncoming(v, messageBB); 1220664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi->addIncoming(llvm::Constant::getNullValue(v->getType()), startBB); 1221664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall msgRet = RValue::get(phi); 1222664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall } else if (msgRet.isAggregate()) { 1223664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::Value *v = msgRet.getAggregateAddr(); 1224bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *phi = Builder.CreatePHI(v->getType(), 2); 12252acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *RetTy = cast<llvm::PointerType>(v->getType()); 1226866163bf6c66211a9b4d5ba160ac02de04ce4be6David Chisnall llvm::AllocaInst *NullVal = 1227866163bf6c66211a9b4d5ba160ac02de04ce4be6David Chisnall CGF.CreateTempAlloca(RetTy->getElementType(), "null"); 1228664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall CGF.InitTempAlloca(NullVal, 1229664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall llvm::Constant::getNullValue(RetTy->getElementType())); 1230664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi->addIncoming(v, messageBB); 1231664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi->addIncoming(NullVal, startBB); 1232664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall msgRet = RValue::getAggregate(phi); 1233664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall } else /* isComplex() */ { 1234664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall std::pair<llvm::Value*,llvm::Value*> v = msgRet.getComplexVal(); 1235bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *phi = Builder.CreatePHI(v.first->getType(), 2); 1236664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi->addIncoming(v.first, messageBB); 1237664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi->addIncoming(llvm::Constant::getNullValue(v.first->getType()), 1238664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall startBB); 1239bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *phi2 = Builder.CreatePHI(v.second->getType(), 2); 1240664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi2->addIncoming(v.second, messageBB); 1241664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall phi2->addIncoming(llvm::Constant::getNullValue(v.second->getType()), 1242664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall startBB); 1243664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall msgRet = RValue::getComplex(phi, phi2); 1244664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall } 1245664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall } 1246664b7c74aff2ccdf9d13eae08b3466326fc6cc1fDavid Chisnall return msgRet; 124720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 124820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 12491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// Generates a MethodList. Used in construction of a objc_class and 125020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov/// objc_category structures. 12515f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::Constant *CGObjCGNU::GenerateMethodList(const StringRef &ClassName, 12525f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const StringRef &CategoryName, 12535f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<Selector> &MethodSels, 12545f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &MethodTypes, 125520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov bool isClassMethodList) { 12560f436560640a1cff5b6d96f80f540770f139453fDavid Chisnall if (MethodSels.empty()) 12570f436560640a1cff5b6d96f80f540770f139453fDavid Chisnall return NULLPtr; 12581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Get the method structure type. 12597650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ObjCMethodTy = llvm::StructType::get( 126020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, // Really a selector, but the runtime creates it us. 126120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, // Method types 1262c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall IMPTy, //Method pointer 126320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 126420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Methods; 126520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Elements; 126620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov for (unsigned int i = 0, e = MethodTypes.size(); i < e; ++i) { 126720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 12689f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::Constant *Method = 126920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov TheModule.getFunction(SymbolNameForMethod(ClassName, CategoryName, 12709f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall MethodSels[i], 12719f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall isClassMethodList)); 12729f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall assert(Method && "Can't generate metadata for method that doesn't exist"); 12739f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::Constant *C = MakeConstantString(MethodSels[i].getAsString()); 12749f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(C); 12759f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(MethodTypes[i]); 12769f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Method = llvm::ConstantExpr::getBitCast(Method, 1277c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall IMPTy); 12789f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(Method); 12799f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Methods.push_back(llvm::ConstantStruct::get(ObjCMethodTy, Elements)); 128020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 128120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 128220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Array of method structures 128396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodTy, 12841e64a9531bf6e9d99ad3271b3a735ef702689b06Fariborz Jahanian Methods.size()); 12857db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::Constant *MethodArray = llvm::ConstantArray::get(ObjCMethodArrayTy, 1286fba676396703e87a5034e5f308aa30a633468f66Chris Lattner Methods); 128720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 128820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Structure containing list pointer, array and array count 1289c1c20114a401e503c07d68c47e0728bb063f35c8Chris Lattner llvm::StructType *ObjCMethodListTy = llvm::StructType::create(VMContext); 12909cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *NextPtrTy = llvm::PointerType::getUnqual(ObjCMethodListTy); 12919cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner ObjCMethodListTy->setBody( 12921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump NextPtrTy, 12931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IntTy, 129420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ObjCMethodArrayTy, 129520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 129620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 129720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Methods.clear(); 129803e205031b08669f05c41eed5b896fc94c4a12bbOwen Anderson Methods.push_back(llvm::ConstantPointerNull::get( 129996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(ObjCMethodListTy))); 1300917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Methods.push_back(llvm::ConstantInt::get(Int32Ty, MethodTypes.size())); 130120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Methods.push_back(MethodArray); 13021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 130320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Create an instance of the structure 130420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return MakeGlobal(ObjCMethodListTy, Methods, ".objc_method_list"); 130520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 130620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 130720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov/// Generates an IvarList. Used in construction of a objc_class. 130820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikovllvm::Constant *CGObjCGNU::GenerateIvarList( 13095f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &IvarNames, 13105f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &IvarTypes, 13115f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &IvarOffsets) { 13121804463ee790ac3cc73f72597ccb38b983f7d263David Chisnall if (IvarNames.size() == 0) 13131804463ee790ac3cc73f72597ccb38b983f7d263David Chisnall return NULLPtr; 13141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Get the method structure type. 13157650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ObjCIvarTy = llvm::StructType::get( 131620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, 131720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, 131820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov IntTy, 131920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 132020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Ivars; 132120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Elements; 132220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov for (unsigned int i = 0, e = IvarNames.size() ; i < e ; i++) { 132320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 13248a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall Elements.push_back(IvarNames[i]); 13258a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall Elements.push_back(IvarTypes[i]); 132620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(IvarOffsets[i]); 132708e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ivars.push_back(llvm::ConstantStruct::get(ObjCIvarTy, Elements)); 132820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 132920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 133020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Array of method structures 133196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ObjCIvarArrayTy = llvm::ArrayType::get(ObjCIvarTy, 133220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov IvarNames.size()); 133320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 13341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 133520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 13364a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Elements.push_back(llvm::ConstantInt::get(IntTy, (int)IvarNames.size())); 13377db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson Elements.push_back(llvm::ConstantArray::get(ObjCIvarArrayTy, Ivars)); 133820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Structure containing array and array count 13397650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ObjCIvarListTy = llvm::StructType::get(IntTy, 134020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ObjCIvarArrayTy, 134120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 134220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 134320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Create an instance of the structure 134420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return MakeGlobal(ObjCIvarListTy, Elements, ".objc_ivar_list"); 13450f984268b05edab2cc555a427c441baa9c252658Chris Lattner} 13460f984268b05edab2cc555a427c441baa9c252658Chris Lattner 134720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov/// Generate a class structure 134820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikovllvm::Constant *CGObjCGNU::GenerateClassStructure( 134920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *MetaClass, 135020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *SuperClass, 135120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov unsigned info, 1352d002cc6fc5b72bf00e3b7b4571ccf0f23c789b4bChris Lattner const char *Name, 135320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *Version, 135420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *InstanceSize, 135520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *IVars, 135620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *Methods, 1357d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *Protocols, 1358d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *IvarOffsets, 13598c757f9ea33dccff4da7810e0c1bda59c19ddc9aDavid Chisnall llvm::Constant *Properties, 1360917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *StrongIvarBitmap, 1361917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *WeakIvarBitmap, 13628c757f9ea33dccff4da7810e0c1bda59c19ddc9aDavid Chisnall bool isMeta) { 136320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Set up the class structure 136420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Note: Several of these are char*s when they should be ids. This is 136520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // because the runtime performs this translation on load. 1366d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // 1367d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Fields marked New ABI are part of the GNUstep runtime. We emit them 1368d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // anyway; the classes will still work with the GNU runtime, they will just 1369d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // be ignored. 13707650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ClassTy = llvm::StructType::get( 137120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, // class_pointer 137220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, // super_class 137320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, // name 137420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov LongTy, // version 137520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov LongTy, // info 137620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov LongTy, // instance_size 137720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov IVars->getType(), // ivars 137820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Methods->getType(), // methods 13791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // These are all filled in by the runtime, so we pretend 138020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy, // dtable 138120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy, // subclass_list 138220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy, // sibling_class 138320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy, // protocols 138420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy, // gc_object_type 1385d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // New ABI: 1386d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian LongTy, // abi_version 1387d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian IvarOffsets->getType(), // ivar_offsets 1388d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Properties->getType(), // properties 13899d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall IntPtrTy, // strong_pointers 13909d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall IntPtrTy, // weak_pointers 139120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 13924a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::Constant *Zero = llvm::ConstantInt::get(LongTy, 0); 139320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Fill in the structure 139420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Elements; 13953c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getBitCast(MetaClass, PtrToInt8Ty)); 139620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(SuperClass); 1397d002cc6fc5b72bf00e3b7b4571ccf0f23c789b4bChris Lattner Elements.push_back(MakeConstantString(Name, ".class_name")); 139820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(Zero); 13994a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Elements.push_back(llvm::ConstantInt::get(LongTy, info)); 140005f3a507bb53ed2bd5573d551a26654a604187ebDavid Chisnall if (isMeta) { 140105f3a507bb53ed2bd5573d551a26654a604187ebDavid Chisnall llvm::TargetData td(&TheModule); 1402e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck Elements.push_back( 1403e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck llvm::ConstantInt::get(LongTy, 1404e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck td.getTypeSizeInBits(ClassTy) / 1405e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck CGM.getContext().getCharWidth())); 140605f3a507bb53ed2bd5573d551a26654a604187ebDavid Chisnall } else 140705f3a507bb53ed2bd5573d551a26654a604187ebDavid Chisnall Elements.push_back(InstanceSize); 140820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(IVars); 140920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(Methods); 1410d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(NULLPtr); 1411d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(NULLPtr); 1412d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(NULLPtr); 14133c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getBitCast(Protocols, PtrTy)); 1414d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(NULLPtr); 1415917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Elements.push_back(llvm::ConstantInt::get(LongTy, 1)); 1416d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(IvarOffsets); 1417d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(Properties); 1418917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Elements.push_back(StrongIvarBitmap); 1419917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Elements.push_back(WeakIvarBitmap); 142020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Create an instance of the structure 142141d63ed274d1bf7ba7459f218c8f6a385fc5c6d6David Chisnall // This is now an externally visible symbol, so that we can speed up class 142241d63ed274d1bf7ba7459f218c8f6a385fc5c6d6David Chisnall // messages in the next ABI. 14238c757f9ea33dccff4da7810e0c1bda59c19ddc9aDavid Chisnall return MakeGlobal(ClassTy, Elements, (isMeta ? "_OBJC_METACLASS_": 14248c757f9ea33dccff4da7810e0c1bda59c19ddc9aDavid Chisnall "_OBJC_CLASS_") + std::string(Name), llvm::GlobalValue::ExternalLinkage); 142520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 142620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 142720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikovllvm::Constant *CGObjCGNU::GenerateProtocolMethodList( 14285f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &MethodNames, 14295f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<llvm::Constant *> &MethodTypes) { 14301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Get the method structure type. 14317650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ObjCMethodDescTy = llvm::StructType::get( 143220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, // Really a selector, but the runtime does the casting for us. 143320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, 143420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 143520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Methods; 143620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Elements; 143720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov for (unsigned int i = 0, e = MethodTypes.size() ; i < e ; i++) { 143820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Elements.push_back(MethodNames[i]); 14408a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall Elements.push_back(MethodTypes[i]); 144108e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Methods.push_back(llvm::ConstantStruct::get(ObjCMethodDescTy, Elements)); 144220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 144396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodDescTy, 144420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov MethodNames.size()); 14457db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::Constant *Array = llvm::ConstantArray::get(ObjCMethodArrayTy, 1446bb1c8600218b3244340331165fc7cba7bf227655Mike Stump Methods); 14477650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ObjCMethodDescListTy = llvm::StructType::get( 144820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov IntTy, ObjCMethodArrayTy, NULL); 144920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Methods.clear(); 14504a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Methods.push_back(llvm::ConstantInt::get(IntTy, MethodNames.size())); 145120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Methods.push_back(Array); 145220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return MakeGlobal(ObjCMethodDescListTy, Methods, ".objc_method_list"); 145320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 1454bb1c8600218b3244340331165fc7cba7bf227655Mike Stump 145520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov// Create the protocol list structure used in classes, categories and so on 145620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikovllvm::Constant *CGObjCGNU::GenerateProtocolList( 14575f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner const SmallVectorImpl<std::string> &Protocols) { 145896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrToInt8Ty, 145920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Protocols.size()); 14607650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ProtocolListTy = llvm::StructType::get( 146120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy, //Should be a recurisve pointer, but it's always NULL here. 14628fac25d33b13e25f512dd921d4d5a4b565f5d175David Chisnall SizeTy, 146320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ProtocolArrayTy, 146420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 14651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump std::vector<llvm::Constant*> Elements; 146620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov for (const std::string *iter = Protocols.begin(), *endIter = Protocols.end(); 146720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov iter != endIter ; iter++) { 1468ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall llvm::Constant *protocol = 0; 1469ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall llvm::StringMap<llvm::Constant*>::iterator value = 1470ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall ExistingProtocols.find(*iter); 1471ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall if (value == ExistingProtocols.end()) { 1472f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian protocol = GenerateEmptyProtocol(*iter); 1473ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall } else { 1474ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall protocol = value->getValue(); 1475ff80fabfa42d4aadbbaab4d61fa518d80b5a981aDavid Chisnall } 14763c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::Constant *Ptr = llvm::ConstantExpr::getBitCast(protocol, 1477a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson PtrToInt8Ty); 147820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(Ptr); 147920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 14807db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, 148120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements); 148220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 148320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(NULLPtr); 14844a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Elements.push_back(llvm::ConstantInt::get(LongTy, Protocols.size())); 148520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(ProtocolArray); 148620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return MakeGlobal(ProtocolListTy, Elements, ".objc_protocol_list"); 148720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 148820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 14891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Value *CGObjCGNU::GenerateProtocolRef(CGBuilderTy &Builder, 1490af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar const ObjCProtocolDecl *PD) { 1491f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian llvm::Value *protocol = ExistingProtocols[PD->getNameAsString()]; 14922acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *T = 1493f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian CGM.getTypes().ConvertType(CGM.getContext().getObjCProtoType()); 149496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return Builder.CreateBitCast(protocol, llvm::PointerType::getUnqual(T)); 1495f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian} 1496f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian 1497f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanianllvm::Constant *CGObjCGNU::GenerateEmptyProtocol( 1498f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian const std::string &ProtocolName) { 14995f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<std::string, 0> EmptyStringVector; 15005f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 0> EmptyConstantVector; 1501f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian 1502f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian llvm::Constant *ProtocolList = GenerateProtocolList(EmptyStringVector); 1503d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *MethodList = 1504f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian GenerateProtocolMethodList(EmptyConstantVector, EmptyConstantVector); 1505f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian // Protocols are objects containing lists of the methods implemented and 1506f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian // protocols adopted. 15077650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ProtocolTy = llvm::StructType::get(IdTy, 1508f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian PtrToInt8Ty, 1509f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian ProtocolList->getType(), 1510d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MethodList->getType(), 1511d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MethodList->getType(), 1512d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MethodList->getType(), 1513d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MethodList->getType(), 1514f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian NULL); 15151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump std::vector<llvm::Constant*> Elements; 1516f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian // The isa pointer must be set to a magic number so the runtime knows it's 1517f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian // the correct layout. 15183c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getIntToPtr( 1519917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ConstantInt::get(Int32Ty, ProtocolVersion), IdTy)); 1520f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian Elements.push_back(MakeConstantString(ProtocolName, ".objc_protocol_name")); 1521f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian Elements.push_back(ProtocolList); 1522d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(MethodList); 1523d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(MethodList); 1524d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(MethodList); 1525d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(MethodList); 1526f8c4f5469d7db591eeacfc3381d91f773fb7af43Fariborz Jahanian return MakeGlobal(ProtocolTy, Elements, ".objc_protocol"); 152720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 152820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 1529af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbarvoid CGObjCGNU::GenerateProtocol(const ObjCProtocolDecl *PD) { 1530af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar ASTContext &Context = CGM.getContext(); 15318ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner std::string ProtocolName = PD->getNameAsString(); 15321d784b277cdfd4eba03680715d2a082b3f28d295Douglas Gregor 15331d784b277cdfd4eba03680715d2a082b3f28d295Douglas Gregor // Use the protocol definition, if there is one. 15341d784b277cdfd4eba03680715d2a082b3f28d295Douglas Gregor if (const ObjCProtocolDecl *Def = PD->getDefinition()) 15351d784b277cdfd4eba03680715d2a082b3f28d295Douglas Gregor PD = Def; 15361d784b277cdfd4eba03680715d2a082b3f28d295Douglas Gregor 15375f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<std::string, 16> Protocols; 1538af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar for (ObjCProtocolDecl::protocol_iterator PI = PD->protocol_begin(), 1539af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar E = PD->protocol_end(); PI != E; ++PI) 1540d9d22dd9c94618490dbffb0e2caf222530ca39d3Chris Lattner Protocols.push_back((*PI)->getNameAsString()); 15415f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> InstanceMethodNames; 15425f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> InstanceMethodTypes; 15435f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> OptionalInstanceMethodNames; 15445f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> OptionalInstanceMethodTypes; 154517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (ObjCProtocolDecl::instmeth_iterator iter = PD->instmeth_begin(), 154617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis E = PD->instmeth_end(); iter != E; iter++) { 1547af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar std::string TypeStr; 1548af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar Context.getObjCEncodingForMethodDecl(*iter, TypeStr); 1549d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if ((*iter)->getImplementationControl() == ObjCMethodDecl::Optional) { 1550d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian InstanceMethodNames.push_back( 1551d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MakeConstantString((*iter)->getSelector().getAsString())); 1552d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 1553d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1554d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalInstanceMethodNames.push_back( 1555d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MakeConstantString((*iter)->getSelector().getAsString())); 1556d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalInstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 1557d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1558af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar } 1559af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar // Collect information about class methods: 15605f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> ClassMethodNames; 15615f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> ClassMethodTypes; 15625f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> OptionalClassMethodNames; 15635f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> OptionalClassMethodTypes; 15641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCProtocolDecl::classmeth_iterator 156517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis iter = PD->classmeth_begin(), endIter = PD->classmeth_end(); 156617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis iter != endIter ; iter++) { 1567af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar std::string TypeStr; 1568af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar Context.getObjCEncodingForMethodDecl((*iter),TypeStr); 1569d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if ((*iter)->getImplementationControl() == ObjCMethodDecl::Optional) { 1570d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ClassMethodNames.push_back( 1571d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MakeConstantString((*iter)->getSelector().getAsString())); 1572d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ClassMethodTypes.push_back(MakeConstantString(TypeStr)); 1573d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1574d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalClassMethodNames.push_back( 1575d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MakeConstantString((*iter)->getSelector().getAsString())); 1576d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalClassMethodTypes.push_back(MakeConstantString(TypeStr)); 1577d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1578af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar } 157920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 158020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *ProtocolList = GenerateProtocolList(Protocols); 158120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *InstanceMethodList = 158220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov GenerateProtocolMethodList(InstanceMethodNames, InstanceMethodTypes); 158320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *ClassMethodList = 158420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov GenerateProtocolMethodList(ClassMethodNames, ClassMethodTypes); 1585d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *OptionalInstanceMethodList = 1586d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian GenerateProtocolMethodList(OptionalInstanceMethodNames, 1587d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalInstanceMethodTypes); 1588d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *OptionalClassMethodList = 1589d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian GenerateProtocolMethodList(OptionalClassMethodNames, 1590d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalClassMethodTypes); 1591d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1592d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Property metadata: name, attributes, isSynthesized, setter name, setter 1593d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // types, getter name, getter types. 1594d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // The isSynthesized value is always set to 0 in a protocol. It exists to 1595d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // simplify the runtime library by allowing it to use the same data 1596d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // structures for protocol metadata everywhere. 15977650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *PropertyMetadataTy = llvm::StructType::get( 1598d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrToInt8Ty, Int8Ty, Int8Ty, PtrToInt8Ty, PtrToInt8Ty, PtrToInt8Ty, 1599d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrToInt8Ty, NULL); 1600d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> Properties; 1601d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> OptionalProperties; 1602d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1603d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Add all of the property methods need adding to the method list and to the 1604d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // property metadata list. 1605d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian for (ObjCContainerDecl::prop_iterator 1606d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian iter = PD->prop_begin(), endIter = PD->prop_end(); 1607d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian iter != endIter ; iter++) { 1608d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> Fields; 1609d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ObjCPropertyDecl *property = (*iter); 1610d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1611d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(MakeConstantString(property->getNameAsString())); 1612d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(llvm::ConstantInt::get(Int8Ty, 1613d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian property->getPropertyAttributes())); 1614d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(llvm::ConstantInt::get(Int8Ty, 0)); 1615d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { 1616d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::string TypeStr; 1617d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Context.getObjCEncodingForMethodDecl(getter,TypeStr); 1618d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 1619d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian InstanceMethodTypes.push_back(TypeEncoding); 1620d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(MakeConstantString(getter->getSelector().getAsString())); 1621d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(TypeEncoding); 1622d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1623d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1624d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1625d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1626d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { 1627d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::string TypeStr; 1628d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Context.getObjCEncodingForMethodDecl(setter,TypeStr); 1629d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 1630d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian InstanceMethodTypes.push_back(TypeEncoding); 1631d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(MakeConstantString(setter->getSelector().getAsString())); 1632d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(TypeEncoding); 1633d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1634d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1635d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1636d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1637d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if (property->getPropertyImplementation() == ObjCPropertyDecl::Optional) { 1638d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalProperties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); 1639d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1640d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Properties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); 1641d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1642d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1643d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *PropertyArray = llvm::ConstantArray::get( 1644d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::ArrayType::get(PropertyMetadataTy, Properties.size()), Properties); 1645d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant* PropertyListInitFields[] = 1646d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian {llvm::ConstantInt::get(IntTy, Properties.size()), NULLPtr, PropertyArray}; 1647d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1648d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *PropertyListInit = 1649c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::ConstantStruct::getAnon(PropertyListInitFields); 1650d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *PropertyList = new llvm::GlobalVariable(TheModule, 1651d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PropertyListInit->getType(), false, llvm::GlobalValue::InternalLinkage, 1652d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PropertyListInit, ".objc_property_list"); 1653d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1654d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *OptionalPropertyArray = 1655d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::ConstantArray::get(llvm::ArrayType::get(PropertyMetadataTy, 1656d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalProperties.size()) , OptionalProperties); 1657d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant* OptionalPropertyListInitFields[] = { 1658d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::ConstantInt::get(IntTy, OptionalProperties.size()), NULLPtr, 1659d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalPropertyArray }; 1660d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1661d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *OptionalPropertyListInit = 1662c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::ConstantStruct::getAnon(OptionalPropertyListInitFields); 1663d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *OptionalPropertyList = new llvm::GlobalVariable(TheModule, 1664d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalPropertyListInit->getType(), false, 1665d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::GlobalValue::InternalLinkage, OptionalPropertyListInit, 1666d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ".objc_property_list"); 1667d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 166820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Protocols are objects containing lists of the methods implemented and 166920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // protocols adopted. 16707650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ProtocolTy = llvm::StructType::get(IdTy, 167120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrToInt8Ty, 167220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ProtocolList->getType(), 167320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov InstanceMethodList->getType(), 167420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ClassMethodList->getType(), 1675d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalInstanceMethodList->getType(), 1676d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalClassMethodList->getType(), 1677d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PropertyList->getType(), 1678d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian OptionalPropertyList->getType(), 167920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov NULL); 16801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump std::vector<llvm::Constant*> Elements; 168120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // The isa pointer must be set to a magic number so the runtime knows it's 168220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // the correct layout. 16833c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getIntToPtr( 1684917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ConstantInt::get(Int32Ty, ProtocolVersion), IdTy)); 168520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(MakeConstantString(ProtocolName, ".objc_protocol_name")); 168620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(ProtocolList); 168720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(InstanceMethodList); 168820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(ClassMethodList); 1689d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(OptionalInstanceMethodList); 1690d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(OptionalClassMethodList); 1691d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(PropertyList); 1692d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(OptionalPropertyList); 16931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ExistingProtocols[ProtocolName] = 16943c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolTy, Elements, 169520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ".objc_protocol"), IdTy); 169620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 1697d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanianvoid CGObjCGNU::GenerateProtocolHolderCategory(void) { 1698d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Collect information about instance methods 16995f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<Selector, 1> MethodSels; 17005f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 1> MethodTypes; 1701d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1702d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> Elements; 1703d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian const std::string ClassName = "__ObjC_Protocol_Holder_Ugly_Hack"; 1704d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian const std::string CategoryName = "AnotherHack"; 1705d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(MakeConstantString(CategoryName)); 1706d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(MakeConstantString(ClassName)); 1707d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Instance method list 1708d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1709d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ClassName, CategoryName, MethodSels, MethodTypes, false), PtrTy)); 1710d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Class method list 1711d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1712d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ClassName, CategoryName, MethodSels, MethodTypes, true), PtrTy)); 1713d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Protocol list 1714d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrTy, 1715d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ExistingProtocols.size()); 17167650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *ProtocolListTy = llvm::StructType::get( 1717d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrTy, //Should be a recurisve pointer, but it's always NULL here. 17188fac25d33b13e25f512dd921d4d5a4b565f5d175David Chisnall SizeTy, 1719d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolArrayTy, 1720d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian NULL); 1721d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> ProtocolElements; 1722d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian for (llvm::StringMapIterator<llvm::Constant*> iter = 1723d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ExistingProtocols.begin(), endIter = ExistingProtocols.end(); 1724d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian iter != endIter ; iter++) { 1725d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *Ptr = llvm::ConstantExpr::getBitCast(iter->getValue(), 1726d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrTy); 1727d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements.push_back(Ptr); 1728d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1729d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, 1730d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements); 1731d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements.clear(); 1732d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements.push_back(NULLPtr); 1733d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements.push_back(llvm::ConstantInt::get(LongTy, 1734d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ExistingProtocols.size())); 1735d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements.push_back(ProtocolArray); 1736d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Elements.push_back(llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolListTy, 1737d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ProtocolElements, ".objc_protocol_list"), PtrTy)); 1738d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Categories.push_back(llvm::ConstantExpr::getBitCast( 17397650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, 1740d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrTy, PtrTy, PtrTy, NULL), Elements), PtrTy)); 1741d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian} 174220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 1743917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// Libobjc2 uses a bitfield representation where small(ish) bitfields are 1744917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// stored in a 64-bit value with the low bit set to 1 and the remaining 63 1745917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// bits set to their values, LSB first, while larger ones are stored in a 1746917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// structure of this / form: 1747917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// 1748917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// struct { int32_t length; int32_t values[length]; }; 1749917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// 1750917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// The values in the array are stored in host-endian format, with the least 1751917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// significant bit being assumed to come first in the bitfield. Therefore, a 1752917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// bitfield with the 64th bit set will be (int64_t)&{ 2, [0, 1<<31] }, while a 1753917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall/// bitfield / with the 63rd bit set will be 1<<64. 1754917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnallllvm::Constant *CGObjCGNU::MakeBitField(llvm::SmallVectorImpl<bool> &bits) { 1755917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall int bitCount = bits.size(); 17569d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall int ptrBits = 17579d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall (TheModule.getPointerSize() == llvm::Module::Pointer32) ? 32 : 64; 17589d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall if (bitCount < ptrBits) { 1759917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall uint64_t val = 1; 1760917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall for (int i=0 ; i<bitCount ; ++i) { 1761e3c944a9f620dacb0c29d16e7d61c8e7fca10963Eli Friedman if (bits[i]) val |= 1ULL<<(i+1); 1762917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall } 17639d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall return llvm::ConstantInt::get(IntPtrTy, val); 1764917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall } 1765917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::SmallVector<llvm::Constant*, 8> values; 1766917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall int v=0; 1767917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall while (v < bitCount) { 1768917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall int32_t word = 0; 1769917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall for (int i=0 ; (i<32) && (v<bitCount) ; ++i) { 1770917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall if (bits[v]) word |= 1<<i; 1771917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall v++; 1772917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall } 1773917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall values.push_back(llvm::ConstantInt::get(Int32Ty, word)); 1774917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall } 1775917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ArrayType *arrayTy = llvm::ArrayType::get(Int32Ty, values.size()); 1776917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *array = llvm::ConstantArray::get(arrayTy, values); 1777917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *fields[2] = { 1778917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ConstantInt::get(Int32Ty, values.size()), 1779917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall array }; 1780917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *GS = MakeGlobal(llvm::StructType::get(Int32Ty, arrayTy, 1781917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall NULL), fields); 178249de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall llvm::Constant *ptr = llvm::ConstantExpr::getPtrToInt(GS, IntPtrTy); 178349de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall return ptr; 1784917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall} 1785917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall 17867ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbarvoid CGObjCGNU::GenerateCategory(const ObjCCategoryImplDecl *OCD) { 17878ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner std::string ClassName = OCD->getClassInterface()->getNameAsString(); 17888ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner std::string CategoryName = OCD->getNameAsString(); 17897ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect information about instance methods 17905f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<Selector, 16> InstanceMethodSels; 17915f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> InstanceMethodTypes; 1792653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor for (ObjCCategoryImplDecl::instmeth_iterator 179317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis iter = OCD->instmeth_begin(), endIter = OCD->instmeth_end(); 1794653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor iter != endIter ; iter++) { 17957ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar InstanceMethodSels.push_back((*iter)->getSelector()); 17967ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar std::string TypeStr; 17977ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar CGM.getContext().getObjCEncodingForMethodDecl(*iter,TypeStr); 17988a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 17997ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar } 18007ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 18017ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect information about class methods 18025f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<Selector, 16> ClassMethodSels; 18035f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> ClassMethodTypes; 18041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCCategoryImplDecl::classmeth_iterator 180517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis iter = OCD->classmeth_begin(), endIter = OCD->classmeth_end(); 1806653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor iter != endIter ; iter++) { 18077ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar ClassMethodSels.push_back((*iter)->getSelector()); 18087ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar std::string TypeStr; 18097ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar CGM.getContext().getObjCEncodingForMethodDecl(*iter,TypeStr); 18108a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall ClassMethodTypes.push_back(MakeConstantString(TypeStr)); 18117ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar } 18127ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 18137ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect the names of referenced protocols 18145f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<std::string, 16> Protocols; 1815ad9e06d82ae627e858e5bfe4a7f1f9337b5b0a15David Chisnall const ObjCCategoryDecl *CatDecl = OCD->getCategoryDecl(); 1816ad9e06d82ae627e858e5bfe4a7f1f9337b5b0a15David Chisnall const ObjCList<ObjCProtocolDecl> &Protos = CatDecl->getReferencedProtocols(); 18177ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), 18187ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar E = Protos.end(); I != E; ++I) 1819d9d22dd9c94618490dbffb0e2caf222530ca39d3Chris Lattner Protocols.push_back((*I)->getNameAsString()); 18207ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 182120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Elements; 182220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(MakeConstantString(CategoryName)); 182320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(MakeConstantString(ClassName)); 18241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Instance method list 18253c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1826a4210076fc1d7ac0a20b8b4a79e18a8ae33b9c69Chris Lattner ClassName, CategoryName, InstanceMethodSels, InstanceMethodTypes, 182720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov false), PtrTy)); 182820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Class method list 18293c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( 1830a4210076fc1d7ac0a20b8b4a79e18a8ae33b9c69Chris Lattner ClassName, CategoryName, ClassMethodSels, ClassMethodTypes, true), 183120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov PtrTy)); 183220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Protocol list 18333c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Elements.push_back(llvm::ConstantExpr::getBitCast( 183420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov GenerateProtocolList(Protocols), PtrTy)); 18353c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Categories.push_back(llvm::ConstantExpr::getBitCast( 18367650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, 183747a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson PtrTy, PtrTy, PtrTy, NULL), Elements), PtrTy)); 183820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 18397ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 1840d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanianllvm::Constant *CGObjCGNU::GeneratePropertyList(const ObjCImplementationDecl *OID, 18415f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<Selector> &InstanceMethodSels, 18425f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<llvm::Constant*> &InstanceMethodTypes) { 1843d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ASTContext &Context = CGM.getContext(); 1844d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // 1845d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Property metadata: name, attributes, isSynthesized, setter name, setter 1846d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // types, getter name, getter types. 18477650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *PropertyMetadataTy = llvm::StructType::get( 1848d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrToInt8Ty, Int8Ty, Int8Ty, PtrToInt8Ty, PtrToInt8Ty, PtrToInt8Ty, 1849d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian PtrToInt8Ty, NULL); 1850d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> Properties; 1851d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1852d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1853d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Add all of the property methods need adding to the method list and to the 1854d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // property metadata list. 1855d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian for (ObjCImplDecl::propimpl_iterator 1856d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian iter = OID->propimpl_begin(), endIter = OID->propimpl_end(); 1857d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian iter != endIter ; iter++) { 1858d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> Fields; 1859d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ObjCPropertyDecl *property = (*iter)->getPropertyDecl(); 186042ba04a072c69d84a6660e4498215086662910acDavid Chisnall ObjCPropertyImplDecl *propertyImpl = *iter; 186142ba04a072c69d84a6660e4498215086662910acDavid Chisnall bool isSynthesized = (propertyImpl->getPropertyImplementation() == 186242ba04a072c69d84a6660e4498215086662910acDavid Chisnall ObjCPropertyImplDecl::Synthesize); 1863d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1864d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(MakeConstantString(property->getNameAsString())); 1865d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(llvm::ConstantInt::get(Int8Ty, 1866d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian property->getPropertyAttributes())); 186742ba04a072c69d84a6660e4498215086662910acDavid Chisnall Fields.push_back(llvm::ConstantInt::get(Int8Ty, isSynthesized)); 1868d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { 1869d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::string TypeStr; 1870d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Context.getObjCEncodingForMethodDecl(getter,TypeStr); 1871d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 187242ba04a072c69d84a6660e4498215086662910acDavid Chisnall if (isSynthesized) { 187342ba04a072c69d84a6660e4498215086662910acDavid Chisnall InstanceMethodTypes.push_back(TypeEncoding); 187442ba04a072c69d84a6660e4498215086662910acDavid Chisnall InstanceMethodSels.push_back(getter->getSelector()); 187542ba04a072c69d84a6660e4498215086662910acDavid Chisnall } 1876d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(MakeConstantString(getter->getSelector().getAsString())); 1877d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(TypeEncoding); 1878d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1879d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1880d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1881d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1882d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { 1883d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::string TypeStr; 1884d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Context.getObjCEncodingForMethodDecl(setter,TypeStr); 1885d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); 188642ba04a072c69d84a6660e4498215086662910acDavid Chisnall if (isSynthesized) { 188742ba04a072c69d84a6660e4498215086662910acDavid Chisnall InstanceMethodTypes.push_back(TypeEncoding); 188842ba04a072c69d84a6660e4498215086662910acDavid Chisnall InstanceMethodSels.push_back(setter->getSelector()); 188942ba04a072c69d84a6660e4498215086662910acDavid Chisnall } 1890d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(MakeConstantString(setter->getSelector().getAsString())); 1891d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(TypeEncoding); 1892d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } else { 1893d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1894d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Fields.push_back(NULLPtr); 1895d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1896d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Properties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); 1897d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian } 1898d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::ArrayType *PropertyArrayTy = 1899d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::ArrayType::get(PropertyMetadataTy, Properties.size()); 1900d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *PropertyArray = llvm::ConstantArray::get(PropertyArrayTy, 1901d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Properties); 1902d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant* PropertyListInitFields[] = 1903d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian {llvm::ConstantInt::get(IntTy, Properties.size()), NULLPtr, PropertyArray}; 1904d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 1905d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *PropertyListInit = 1906c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::ConstantStruct::getAnon(PropertyListInitFields); 1907d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian return new llvm::GlobalVariable(TheModule, PropertyListInit->getType(), false, 1908d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::GlobalValue::InternalLinkage, PropertyListInit, 1909d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian ".objc_property_list"); 1910d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian} 1911d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 19127ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbarvoid CGObjCGNU::GenerateClass(const ObjCImplementationDecl *OID) { 19137ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar ASTContext &Context = CGM.getContext(); 19147ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 19157ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Get the superclass name. 19161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ObjCInterfaceDecl * SuperClassDecl = 19177ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar OID->getClassInterface()->getSuperClass(); 19188ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner std::string SuperClassName; 19192a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner if (SuperClassDecl) { 19208ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner SuperClassName = SuperClassDecl->getNameAsString(); 19212a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner EmitClassRef(SuperClassName); 19222a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner } 19237ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 19247ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Get the class name 192509dc6660487fc2f4a4bb2032e30123d3e0da7230Chris Lattner ObjCInterfaceDecl *ClassDecl = 192609dc6660487fc2f4a4bb2032e30123d3e0da7230Chris Lattner const_cast<ObjCInterfaceDecl *>(OID->getClassInterface()); 19278ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner std::string ClassName = ClassDecl->getNameAsString(); 19282a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner // Emit the symbol that is used to generate linker errors if this class is 19292a8e4e1d8548dc3e30d7c9ba92127c7884a11448Chris Lattner // referenced in other modules but not declared. 1930c51db23f58bd887b16cf91554aa86c430a2496e7Fariborz Jahanian std::string classSymbolName = "__objc_class_name_" + ClassName; 19311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (llvm::GlobalVariable *symbol = 1932c51db23f58bd887b16cf91554aa86c430a2496e7Fariborz Jahanian TheModule.getGlobalVariable(classSymbolName)) { 19334a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson symbol->setInitializer(llvm::ConstantInt::get(LongTy, 0)); 1934c51db23f58bd887b16cf91554aa86c430a2496e7Fariborz Jahanian } else { 19351c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, LongTy, false, 19364a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::GlobalValue::ExternalLinkage, llvm::ConstantInt::get(LongTy, 0), 19371c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson classSymbolName); 1938c51db23f58bd887b16cf91554aa86c430a2496e7Fariborz Jahanian } 19391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19402bebbf0acee55404de4b8846713b64429e744e8fDaniel Dunbar // Get the size of instances. 19415f022d82696c84e4d127c558871d68ac6273274eKen Dyck int instanceSize = 19425f022d82696c84e4d127c558871d68ac6273274eKen Dyck Context.getASTObjCImplementationLayout(OID).getSize().getQuantity(); 19437ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 19447ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect information about instance variables. 19455f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> IvarNames; 19465f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> IvarTypes; 19475f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> IvarOffsets; 19481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1949d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian std::vector<llvm::Constant*> IvarOffsetValues; 1950917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall SmallVector<bool, 16> WeakIvars; 1951917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall SmallVector<bool, 16> StrongIvars; 1952d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 19531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump int superInstanceSize = !SuperClassDecl ? 0 : 19545f022d82696c84e4d127c558871d68ac6273274eKen Dyck Context.getASTObjCInterfaceLayout(SuperClassDecl).getSize().getQuantity(); 19559cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian // For non-fragile ivars, set the instance size to 0 - {the size of just this 19569cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian // class}. The runtime will then set this to the correct value on load. 19579cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { 19589cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian instanceSize = 0 - (instanceSize - superInstanceSize); 19599cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian } 19607f63cb098f2461643f71ea590c1a477603f27f63David Chisnall 1961db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *IVD = ClassDecl->all_declared_ivar_begin(); IVD; 1962db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose IVD = IVD->getNextIvar()) { 19637ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Store the name 19647f63cb098f2461643f71ea590c1a477603f27f63David Chisnall IvarNames.push_back(MakeConstantString(IVD->getNameAsString())); 19657ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Get the type encoding for this ivar 19667ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar std::string TypeStr; 19677f63cb098f2461643f71ea590c1a477603f27f63David Chisnall Context.getObjCEncodingForType(IVD->getType(), TypeStr); 19688a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall IvarTypes.push_back(MakeConstantString(TypeStr)); 19697ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Get the offset 1970d901da531433254210a08e8b1f9e1ad049b340aaDavid Chisnall uint64_t BaseOffset = ComputeIvarBaseOffset(CGM, OID, IVD); 1971aecbf24a6bad049437f8fec97e557d414003a3dbDavid Chisnall uint64_t Offset = BaseOffset; 19729cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian if (CGM.getContext().getLangOptions().ObjCNonFragileABI) { 1973d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian Offset = BaseOffset - superInstanceSize; 19749cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian } 197563ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall llvm::Constant *OffsetValue = llvm::ConstantInt::get(IntTy, Offset); 197663ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall // Create the direct offset value 197763ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall std::string OffsetName = "__objc_ivar_offset_value_" + ClassName +"." + 197863ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall IVD->getNameAsString(); 197963ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall llvm::GlobalVariable *OffsetVar = TheModule.getGlobalVariable(OffsetName); 198063ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall if (OffsetVar) { 198163ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall OffsetVar->setInitializer(OffsetValue); 198263ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall // If this is the real definition, change its linkage type so that 198363ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall // different modules will use this one, rather than their private 198463ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall // copy. 198563ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall OffsetVar->setLinkage(llvm::GlobalValue::ExternalLinkage); 198663ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall } else 198763ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall OffsetVar = new llvm::GlobalVariable(TheModule, IntTy, 1988d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian false, llvm::GlobalValue::ExternalLinkage, 198963ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall OffsetValue, 1990d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian "__objc_ivar_offset_value_" + ClassName +"." + 199163ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall IVD->getNameAsString()); 199263ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall IvarOffsets.push_back(OffsetValue); 199363ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall IvarOffsetValues.push_back(OffsetVar); 1994917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Qualifiers::ObjCLifetime lt = IVD->getType().getQualifiers().getObjCLifetime(); 1995917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall switch (lt) { 1996917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall case Qualifiers::OCL_Strong: 1997917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall StrongIvars.push_back(true); 1998917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall WeakIvars.push_back(false); 1999917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall break; 2000917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall case Qualifiers::OCL_Weak: 2001917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall StrongIvars.push_back(false); 2002917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall WeakIvars.push_back(true); 2003917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall break; 2004917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall default: 2005917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall StrongIvars.push_back(false); 2006917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall WeakIvars.push_back(false); 2007917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall } 20087ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar } 2009917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *StrongIvarBitmap = MakeBitField(StrongIvars); 2010917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Constant *WeakIvarBitmap = MakeBitField(WeakIvars); 20119f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::GlobalVariable *IvarOffsetArray = 20129f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall MakeGlobalArray(PtrToIntTy, IvarOffsetValues, ".ivar.offsets"); 20139f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 20147ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 20157ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect information about instance methods 20165f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<Selector, 16> InstanceMethodSels; 20175f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> InstanceMethodTypes; 20181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::instmeth_iterator 201917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis iter = OID->instmeth_begin(), endIter = OID->instmeth_end(); 2020653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor iter != endIter ; iter++) { 20217ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar InstanceMethodSels.push_back((*iter)->getSelector()); 20227ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar std::string TypeStr; 20237ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar Context.getObjCEncodingForMethodDecl((*iter),TypeStr); 20248a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); 20257ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar } 2026d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 2027d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian llvm::Constant *Properties = GeneratePropertyList(OID, InstanceMethodSels, 2028d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian InstanceMethodTypes); 2029d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 20307ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 20317ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect information about class methods 20325f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<Selector, 16> ClassMethodSels; 20335f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 16> ClassMethodTypes; 2034653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor for (ObjCImplementationDecl::classmeth_iterator 203517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis iter = OID->classmeth_begin(), endIter = OID->classmeth_end(); 2036653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor iter != endIter ; iter++) { 20377ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar ClassMethodSels.push_back((*iter)->getSelector()); 20387ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar std::string TypeStr; 20397ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar Context.getObjCEncodingForMethodDecl((*iter),TypeStr); 20408a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall ClassMethodTypes.push_back(MakeConstantString(TypeStr)); 20417ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar } 20427ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar // Collect the names of referenced protocols 20435f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<std::string, 16> Protocols; 20447ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar const ObjCList<ObjCProtocolDecl> &Protos =ClassDecl->getReferencedProtocols(); 20457ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), 20467ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar E = Protos.end(); I != E; ++I) 2047d9d22dd9c94618490dbffb0e2caf222530ca39d3Chris Lattner Protocols.push_back((*I)->getNameAsString()); 20487ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 20497ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 20507ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 205120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Get the superclass pointer. 205220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *SuperClass; 20538ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner if (!SuperClassName.empty()) { 205420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov SuperClass = MakeConstantString(SuperClassName, ".super_class_name"); 205520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } else { 205603e205031b08669f05c41eed5b896fc94c4a12bbOwen Anderson SuperClass = llvm::ConstantPointerNull::get(PtrToInt8Ty); 205720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 205820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Empty vector used to construct empty method lists 20595f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Constant*, 1> empty; 206020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Generate the method and instance variable lists 206120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *MethodList = GenerateMethodList(ClassName, "", 2062a4210076fc1d7ac0a20b8b4a79e18a8ae33b9c69Chris Lattner InstanceMethodSels, InstanceMethodTypes, false); 206320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *ClassMethodList = GenerateMethodList(ClassName, "", 2064a4210076fc1d7ac0a20b8b4a79e18a8ae33b9c69Chris Lattner ClassMethodSels, ClassMethodTypes, true); 206520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *IvarList = GenerateIvarList(IvarNames, IvarTypes, 206620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov IvarOffsets); 20671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Irrespective of whether we are compiling for a fragile or non-fragile ABI, 20688a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // we emit a symbol containing the offset for each ivar in the class. This 20698a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // allows code compiled for the non-Fragile ABI to inherit from code compiled 20708a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // for the legacy ABI, without causing problems. The converse is also 20718a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // possible, but causes all ivar accesses to be fragile. 2072e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall 20738a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // Offset pointer for getting at the correct field in the ivar list when 20748a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // setting up the alias. These are: The base address for the global, the 20758a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // ivar array (second field), the ivar in this list (set for each ivar), and 20768a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // the offset (third field in ivar structure) 2077917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::Type *IndexTy = Int32Ty; 20788a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::Constant *offsetPointerIndexes[] = {Zeros[0], 20791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantInt::get(IndexTy, 1), 0, 20808a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::ConstantInt::get(IndexTy, 2) }; 20818a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall 2082db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose unsigned ivarIndex = 0; 2083db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *IVD = ClassDecl->all_declared_ivar_begin(); IVD; 2084db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose IVD = IVD->getNextIvar()) { 20858a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall const std::string Name = "__objc_ivar_offset_" + ClassName + '.' 2086e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall + IVD->getNameAsString(); 2087db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose offsetPointerIndexes[2] = llvm::ConstantInt::get(IndexTy, ivarIndex); 20888a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // Get the correct ivar field 20898a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::Constant *offsetValue = llvm::ConstantExpr::getGetElementPtr( 2090a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad IvarList, offsetPointerIndexes); 2091e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // Get the existing variable, if one exists. 20928a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::GlobalVariable *offset = TheModule.getNamedGlobal(Name); 20938a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall if (offset) { 20948a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall offset->setInitializer(offsetValue); 20958a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // If this is the real definition, change its linkage type so that 20968a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // different modules will use this one, rather than their private 20978a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // copy. 20988a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall offset->setLinkage(llvm::GlobalValue::ExternalLinkage); 20998a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall } else { 21008a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // Add a new alias if there isn't one already. 21018a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall offset = new llvm::GlobalVariable(TheModule, offsetValue->getType(), 21028a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall false, llvm::GlobalValue::ExternalLinkage, offsetValue, Name); 21038a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall } 2104db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose ++ivarIndex; 21058a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall } 21069d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall llvm::Constant *ZeroPtr = llvm::ConstantInt::get(IntPtrTy, 0); 210720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov //Generate metaclass for class methods 210820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *MetaClassStruct = GenerateClassStructure(NULLPtr, 21091804463ee790ac3cc73f72597ccb38b983f7d263David Chisnall NULLPtr, 0x12L, ClassName.c_str(), 0, Zeros[0], GenerateIvarList( 2110917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall empty, empty, empty), ClassMethodList, NULLPtr, 21119d06ba82d8afb1cf01235f38f350ce5ad0c15444David Chisnall NULLPtr, NULLPtr, ZeroPtr, ZeroPtr, true); 21125efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar 211320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Generate the class structure 21148ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner llvm::Constant *ClassStruct = 2115d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian GenerateClassStructure(MetaClassStruct, SuperClass, 0x11L, 21168ec03f58c33c33a917f54bb7f2cd61b6d7ffe0caChris Lattner ClassName.c_str(), 0, 21174a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(LongTy, instanceSize), IvarList, 2118d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian MethodList, GenerateProtocolList(Protocols), IvarOffsetArray, 2119917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Properties, StrongIvarBitmap, WeakIvarBitmap); 21205efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar 21215efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar // Resolve the class aliases, if they exist. 21225efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar if (ClassPtrAlias) { 21230b9c22b61a3c99c8c0e8d898adb0f60afa76584eDavid Chisnall ClassPtrAlias->replaceAllUsesWith( 21243c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(ClassStruct, IdTy)); 21250b9c22b61a3c99c8c0e8d898adb0f60afa76584eDavid Chisnall ClassPtrAlias->eraseFromParent(); 21265efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar ClassPtrAlias = 0; 21275efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar } 21285efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar if (MetaClassPtrAlias) { 21290b9c22b61a3c99c8c0e8d898adb0f60afa76584eDavid Chisnall MetaClassPtrAlias->replaceAllUsesWith( 21303c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(MetaClassStruct, IdTy)); 21310b9c22b61a3c99c8c0e8d898adb0f60afa76584eDavid Chisnall MetaClassPtrAlias->eraseFromParent(); 21325efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar MetaClassPtrAlias = 0; 21335efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar } 21345efccb1ab81a029ddeb3ea18e239d0ddc124ec2bDaniel Dunbar 213520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Add class structure to list to be added to the symtab later 21363c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson ClassStruct = llvm::ConstantExpr::getBitCast(ClassStruct, PtrToInt8Ty); 213720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Classes.push_back(ClassStruct); 213820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 213920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 2140c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian 21411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Function *CGObjCGNU::ModuleInitFunction() { 214220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Only emit an ObjC load function if no Objective-C stuff has been called 214320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov if (Classes.empty() && Categories.empty() && ConstantStrings.empty() && 21449f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall ExistingProtocols.empty() && SelectorTable.empty()) 214520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return NULL; 21461b8956e1ce4c5770982d6e59edb16979b500677aEli Friedman 2147d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian // Add all referenced protocols to a category. 2148d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian GenerateProtocolHolderCategory(); 2149d9a1db3a4ded1c8f0daa43c0d6167576e2766453Fariborz Jahanian 21502acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *SelStructTy = dyn_cast<llvm::StructType>( 2151e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner SelectorTy->getElementType()); 2152ef6de3da8572607f786303c07150daa6e140ab19Jay Foad llvm::Type *SelStructPtrTy = SelectorTy; 2153e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner if (SelStructTy == 0) { 21547650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner SelStructTy = llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, NULL); 215596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson SelStructPtrTy = llvm::PointerType::getUnqual(SelStructTy); 2156e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner } 2157e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner 215820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Elements; 215971238f67c5df13eef19450d66b7a7ab28377192aChris Lattner llvm::Constant *Statics = NULLPtr; 216020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Generate statics list: 216171238f67c5df13eef19450d66b7a7ab28377192aChris Lattner if (ConstantStrings.size()) { 216296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *StaticsArrayTy = llvm::ArrayType::get(PtrToInt8Ty, 216371238f67c5df13eef19450d66b7a7ab28377192aChris Lattner ConstantStrings.size() + 1); 216471238f67c5df13eef19450d66b7a7ab28377192aChris Lattner ConstantStrings.push_back(NULLPtr); 21658a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall 21665f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef StringClass = CGM.getLangOptions().ObjCConstantStringClass; 21679f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 21681b0969590e712d7d52fc9c0d43d3ab85c36d07a6Daniel Dunbar if (StringClass.empty()) StringClass = "NXConstantString"; 21699f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 21708a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall Elements.push_back(MakeConstantString(StringClass, 21718a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall ".objc_static_class_name")); 21727db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson Elements.push_back(llvm::ConstantArray::get(StaticsArrayTy, 217371238f67c5df13eef19450d66b7a7ab28377192aChris Lattner ConstantStrings)); 21741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType *StaticsListTy = 21757650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(PtrToInt8Ty, StaticsArrayTy, NULL); 2176a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Type *StaticsListPtrTy = 217796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(StaticsListTy); 217871238f67c5df13eef19450d66b7a7ab28377192aChris Lattner Statics = MakeGlobal(StaticsListTy, Elements, ".objc_statics"); 21791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ArrayType *StaticsListArrayTy = 218096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType::get(StaticsListPtrTy, 2); 218171238f67c5df13eef19450d66b7a7ab28377192aChris Lattner Elements.clear(); 218271238f67c5df13eef19450d66b7a7ab28377192aChris Lattner Elements.push_back(Statics); 2183c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson Elements.push_back(llvm::Constant::getNullValue(StaticsListPtrTy)); 218471238f67c5df13eef19450d66b7a7ab28377192aChris Lattner Statics = MakeGlobal(StaticsListArrayTy, Elements, ".objc_statics_ptr"); 21853c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Statics = llvm::ConstantExpr::getBitCast(Statics, PtrTy); 218671238f67c5df13eef19450d66b7a7ab28377192aChris Lattner } 218720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Array of classes, categories, and constant objects 218896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ClassListTy = llvm::ArrayType::get(PtrToInt8Ty, 218920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Classes.size() + Categories.size() + 2); 21907650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType *SymTabTy = llvm::StructType::get(LongTy, SelStructPtrTy, 21910032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt16Ty(VMContext), 21920032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt16Ty(VMContext), 2193630404b16e886238ed68a1abbfe2e548f43aa664Chris Lattner ClassListTy, NULL); 219420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 219520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 219620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Pointer to an array of selectors used in this module. 219720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::vector<llvm::Constant*> Selectors; 21989f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall std::vector<llvm::GlobalAlias*> SelectorAliases; 21999f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall for (SelectorMap::iterator iter = SelectorTable.begin(), 22009f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall iterEnd = SelectorTable.end(); iter != iterEnd ; ++iter) { 22019f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 22029f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall std::string SelNameStr = iter->first.getAsString(); 22039f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::Constant *SelName = ExportUniqueString(SelNameStr, ".objc_sel_name"); 22049f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 22055f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<TypedSelector> &Types = iter->second; 22065f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner for (SmallVectorImpl<TypedSelector>::iterator i = Types.begin(), 22079f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall e = Types.end() ; i!=e ; i++) { 22089f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 22099f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::Constant *SelectorTypeEncoding = NULLPtr; 22109f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall if (!i->first.empty()) 22119f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelectorTypeEncoding = MakeConstantString(i->first, ".objc_sel_types"); 22129f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 22139f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(SelName); 22149f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(SelectorTypeEncoding); 22159f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); 22169f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.clear(); 22179f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 22189f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // Store the selector alias for later replacement 22199f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelectorAliases.push_back(i->second); 22209f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall } 222120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 22229f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall unsigned SelectorCount = Selectors.size(); 22239f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // NULL-terminate the selector list. This should not actually be required, 22249f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // because the selector list has a length field. Unfortunately, the GCC 22259f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // runtime decides to ignore the length field and expects a NULL terminator, 22269f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // and GCC cooperates with this by always setting the length to 0. 222720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(NULLPtr); 222820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(NULLPtr); 222908e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); 223020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 22319f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 223220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Number of static selectors 22339f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(llvm::ConstantInt::get(LongTy, SelectorCount)); 22349f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall llvm::Constant *SelectorList = MakeGlobalArray(SelStructTy, Selectors, 223520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov ".objc_selector_list"); 22361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Elements.push_back(llvm::ConstantExpr::getBitCast(SelectorList, 2237e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner SelStructPtrTy)); 223820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 223920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Now that all of the static selectors exist, create pointers to them. 22409f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall for (unsigned int i=0 ; i<SelectorCount ; i++) { 22419f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 224220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *Idxs[] = {Zeros[0], 2243917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall llvm::ConstantInt::get(Int32Ty, i), Zeros[0]}; 22449f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // FIXME: We're generating redundant loads and stores here! 2245c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall llvm::Constant *SelPtr = llvm::ConstantExpr::getGetElementPtr(SelectorList, 2246a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad makeArrayRef(Idxs, 2)); 2247e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner // If selectors are defined as an opaque type, cast the pointer to this 2248e160c9b09d2f5098dfdcca99b9c6485487e0c252Chris Lattner // type. 2249c7ef46254339450de33125f712c7b99afaf4fbcdDavid Chisnall SelPtr = llvm::ConstantExpr::getBitCast(SelPtr, SelectorTy); 22509f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelectorAliases[i]->replaceAllUsesWith(SelPtr); 22519f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SelectorAliases[i]->eraseFromParent(); 225220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov } 22539f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 225420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Number of classes defined. 22551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Elements.push_back(llvm::ConstantInt::get(llvm::Type::getInt16Ty(VMContext), 225620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Classes.size())); 225720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Number of categories defined 22581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Elements.push_back(llvm::ConstantInt::get(llvm::Type::getInt16Ty(VMContext), 225920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Categories.size())); 226020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Create an array of classes, then categories, then static object instances 226120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Classes.insert(Classes.end(), Categories.begin(), Categories.end()); 226220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // NULL-terminated list of static object instances (mainly constant strings) 226320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Classes.push_back(Statics); 226420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Classes.push_back(NULLPtr); 22657db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::Constant *ClassList = llvm::ConstantArray::get(ClassListTy, Classes); 226620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(ClassList); 22671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Construct the symbol table 226820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Constant *SymTab= MakeGlobal(SymTabTy, Elements); 226920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 227020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // The symbol table is contained in a module which has some version-checking 227120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // constants 22727650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType * ModuleTy = llvm::StructType::get(LongTy, LongTy, 2273a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall PtrToInt8Ty, llvm::PointerType::getUnqual(SymTabTy), 2274f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall (RuntimeVersion >= 10) ? IntTy : NULL, NULL); 227520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.clear(); 22769f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // Runtime version, used for ABI compatibility checking. 22779f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(llvm::ConstantInt::get(LongTy, RuntimeVersion)); 227891a0b51438e5259a79d68d7450c453827beed9e2Fariborz Jahanian // sizeof(ModuleTy) 227974a8bbf0654fbbf37be04b240b5bbe591f37f242Benjamin Kramer llvm::TargetData td(&TheModule); 2280e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck Elements.push_back( 2281e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck llvm::ConstantInt::get(LongTy, 2282e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck td.getTypeSizeInBits(ModuleTy) / 2283e0afc892e75f526f7ecce7dd152d946337632efeKen Dyck CGM.getContext().getCharWidth())); 22849f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall 22859f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall // The path to the source file where this module was declared 22869f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall SourceManager &SM = CGM.getContext().getSourceManager(); 22879f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall const FileEntry *mainFile = SM.getFileEntryForID(SM.getMainFileID()); 22889f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall std::string path = 22899f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall std::string(mainFile->getDir()->getName()) + '/' + mainFile->getName(); 22909f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Elements.push_back(MakeConstantString(path, ".objc_source_file_name")); 229120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Elements.push_back(SymTab); 2292a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall 2293f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall if (RuntimeVersion >= 10) 2294e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor switch (CGM.getLangOptions().getGC()) { 2295f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall case LangOptions::GCOnly: 2296a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall Elements.push_back(llvm::ConstantInt::get(IntTy, 2)); 2297a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall break; 2298f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall case LangOptions::NonGC: 2299f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall if (CGM.getLangOptions().ObjCAutoRefCount) 2300f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall Elements.push_back(llvm::ConstantInt::get(IntTy, 1)); 2301f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall else 2302f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall Elements.push_back(llvm::ConstantInt::get(IntTy, 0)); 2303f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall break; 2304f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall case LangOptions::HybridGC: 2305f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall Elements.push_back(llvm::ConstantInt::get(IntTy, 1)); 2306f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall break; 2307f074885425af40e5e03569371e453d9f7ae43aa6David Chisnall } 2308a2120039ed08a5d5d6096e2560fd32c6128e951aDavid Chisnall 230920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Value *Module = MakeGlobal(ModuleTy, Elements); 231020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 231120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // Create the load function calling the runtime entry point with the module 231220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov // structure 231320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::Function * LoadFunction = llvm::Function::Create( 23140032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false), 231520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov llvm::GlobalValue::InternalLinkage, ".objc_load_function", 231620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov &TheModule); 23170032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::BasicBlock *EntryBB = 23180032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::BasicBlock::Create(VMContext, "entry", LoadFunction); 2319a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson CGBuilderTy Builder(VMContext); 232020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Builder.SetInsertPoint(EntryBB); 232126c8294dacc2efc83d8d560593ff863e7a32a48fFariborz Jahanian 232295d318c4c10437db40ca6e15fdf32e04012da58eBenjamin Kramer llvm::FunctionType *FT = 2323da549e8995c447542d5631b8b67fcc3a9582797aJay Foad llvm::FunctionType::get(Builder.getVoidTy(), 2324da549e8995c447542d5631b8b67fcc3a9582797aJay Foad llvm::PointerType::getUnqual(ModuleTy), true); 232595d318c4c10437db40ca6e15fdf32e04012da58eBenjamin Kramer llvm::Value *Register = CGM.CreateRuntimeFunction(FT, "__objc_exec_class"); 232620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Builder.CreateCall(Register, Module); 232720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov Builder.CreateRetVoid(); 23289cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian 232920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov return LoadFunction; 233020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov} 23317ded7f4983dc4a20561db7a8d02c6b2435030961Daniel Dunbar 2332679a502d462ef819e6175b58e255ca3f3391e7cfFariborz Jahanianllvm::Function *CGObjCGNU::GenerateMethod(const ObjCMethodDecl *OMD, 23331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ObjCContainerDecl *CD) { 23341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ObjCCategoryImplDecl *OCD = 23353e0a540b6d846178857289ec0eb8470a278d11a3Steve Naroff dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext()); 23365f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef CategoryName = OCD ? OCD->getName() : ""; 23375f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef ClassName = CD->getName(); 23389f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall Selector MethodName = OMD->getSelector(); 2339f8d49f64ef6ab7e632717a31631fc289aab69428Douglas Gregor bool isClassMethod = !OMD->isInstanceMethod(); 2340391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner 2341541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar CodeGenTypes &Types = CGM.getTypes(); 23422acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *MethodTy = 2343541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar Types.GetFunctionType(Types.getFunctionInfo(OMD), OMD->isVariadic()); 234420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov std::string FunctionName = SymbolNameForMethod(ClassName, CategoryName, 234520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov MethodName, isClassMethod); 234620ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov 2347d6c93d703541c992e06eb9a59a2d826a30da65b2Daniel Dunbar llvm::Function *Method 23481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump = llvm::Function::Create(MethodTy, 23491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::InternalLinkage, 23501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FunctionName, 23511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump &TheModule); 2352391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner return Method; 2353391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner} 2354391d77a26382dddf25da73e29fc1fa5aaaea4c6fChris Lattner 2355789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnallllvm::Constant *CGObjCGNU::GetPropertyGetFunction() { 23569f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return GetPropertyFn; 235749f6602707887eea1a558a1dffe0213102f887f2Daniel Dunbar} 235849f6602707887eea1a558a1dffe0213102f887f2Daniel Dunbar 2359789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnallllvm::Constant *CGObjCGNU::GetPropertySetFunction() { 23609f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return SetPropertyFn; 236149f6602707887eea1a558a1dffe0213102f887f2Daniel Dunbar} 236249f6602707887eea1a558a1dffe0213102f887f2Daniel Dunbar 2363789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnallllvm::Constant *CGObjCGNU::GetGetStructFunction() { 23649f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return GetStructPropertyFn; 23658fac25d33b13e25f512dd921d4d5a4b565f5d175David Chisnall} 2366789ecdebd04aebdb2d6b801ebe8e04a189ebc023David Chisnallllvm::Constant *CGObjCGNU::GetSetStructFunction() { 23679f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return SetStructPropertyFn; 23686cc590602f41c3e98e8af0023d54296c8eca7910Fariborz Jahanian} 23696cc590602f41c3e98e8af0023d54296c8eca7910Fariborz Jahanian 2370309a4368cd299cff30ab22709e2b772cf8059e45Daniel Dunbarllvm::Constant *CGObjCGNU::EnumerationMutationFunction() { 23719f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return EnumerationMutationFn; 23722abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson} 23732abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson 23749f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitSynchronizedStmt(CodeGenFunction &CGF, 2375f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall const ObjCAtSynchronizedStmt &S) { 23769735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall EmitAtSynchronizedStmt(CGF, S, SyncEnterFn, SyncExitFn); 2377f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall} 23785dc0867af17b3bd6f567897433853b2b4767446cChris Lattner 23795dc0867af17b3bd6f567897433853b2b4767446cChris Lattner 23809f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitTryStmt(CodeGenFunction &CGF, 2381f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall const ObjCAtTryStmt &S) { 2382f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // Unlike the Apple non-fragile runtimes, which also uses 2383f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // unwind-based zero cost exceptions, the GNU Objective C runtime's 2384f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // EH support isn't a veneer over C++ EH. Instead, exception 2385f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // objects are created by __objc_exception_throw and destroyed by 2386f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // the personality function; this avoids the need for bracketing 2387f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // catch handlers with calls to __blah_begin_catch/__blah_end_catch 2388f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // (or even _Unwind_DeleteException), but probably doesn't 2389f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall // interoperate very well with foreign exceptions. 23909735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // 239180558d2db10a96eada4d8fb79949b3263b44652bDavid Chisnall // In Objective-C++ mode, we actually emit something equivalent to the C++ 23929735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall // exception handler. 23939735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall EmitTryCatchStmt(CGF, S, EnterCatchFn, ExitCatchFn, ExceptionReThrowFn); 23949735ca6e01113aec6a825dd5b1cb1b98fb377d31David Chisnall return ; 239564d5d6c5903157c521af496479d06dc26032d718Anders Carlsson} 239664d5d6c5903157c521af496479d06dc26032d718Anders Carlsson 23979f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitThrowStmt(CodeGenFunction &CGF, 239849f6602707887eea1a558a1dffe0213102f887f2Daniel Dunbar const ObjCAtThrowStmt &S) { 23995dc0867af17b3bd6f567897433853b2b4767446cChris Lattner llvm::Value *ExceptionAsObject; 24005dc0867af17b3bd6f567897433853b2b4767446cChris Lattner 24015dc0867af17b3bd6f567897433853b2b4767446cChris Lattner if (const Expr *ThrowExpr = S.getThrowExpr()) { 24022b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr); 24031e64a9531bf6e9d99ad3271b3a735ef702689b06Fariborz Jahanian ExceptionAsObject = Exception; 24045dc0867af17b3bd6f567897433853b2b4767446cChris Lattner } else { 24051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) && 24065dc0867af17b3bd6f567897433853b2b4767446cChris Lattner "Unexpected rethrow outside @catch block."); 24075dc0867af17b3bd6f567897433853b2b4767446cChris Lattner ExceptionAsObject = CGF.ObjCEHValueStack.back(); 24085dc0867af17b3bd6f567897433853b2b4767446cChris Lattner } 2409578faa837b552403e2002b97fdfbfde14f2448e5Benjamin Kramer ExceptionAsObject = CGF.Builder.CreateBitCast(ExceptionAsObject, IdTy); 24101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24115dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // Note: This may have to be an invoke, if we want to support constructs like: 24125dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // @try { 24135dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // @throw(obj); 24145dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // } 24155dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // @catch(id) ... 24165dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // 24175dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // This is effectively turning @throw into an incredibly-expensive goto, but 24185dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // it may happen as a result of inlining followed by missed optimizations, or 24195dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // as a result of stupidity. 24205dc0867af17b3bd6f567897433853b2b4767446cChris Lattner llvm::BasicBlock *UnwindBB = CGF.getInvokeDest(); 24215dc0867af17b3bd6f567897433853b2b4767446cChris Lattner if (!UnwindBB) { 24229f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall CGF.Builder.CreateCall(ExceptionThrowFn, ExceptionAsObject); 24235dc0867af17b3bd6f567897433853b2b4767446cChris Lattner CGF.Builder.CreateUnreachable(); 24245dc0867af17b3bd6f567897433853b2b4767446cChris Lattner } else { 24254c7d9f1507d0f102bd4133bba63348636facd469Jay Foad CGF.Builder.CreateInvoke(ExceptionThrowFn, UnwindBB, UnwindBB, 24264c7d9f1507d0f102bd4133bba63348636facd469Jay Foad ExceptionAsObject); 24275dc0867af17b3bd6f567897433853b2b4767446cChris Lattner } 24285dc0867af17b3bd6f567897433853b2b4767446cChris Lattner // Clear the insertion point to indicate we are in unreachable code. 24295dc0867af17b3bd6f567897433853b2b4767446cChris Lattner CGF.Builder.ClearInsertionPoint(); 243064d5d6c5903157c521af496479d06dc26032d718Anders Carlsson} 243164d5d6c5903157c521af496479d06dc26032d718Anders Carlsson 24329f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallllvm::Value * CGObjCGNU::EmitObjCWeakRead(CodeGenFunction &CGF, 24331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *AddrWeakObj) { 2434ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall CGBuilderTy B = CGF.Builder; 243531fc0c1a16dabd397dd3323fb0dbe7052b87abd0David Chisnall AddrWeakObj = EnforceType(B, AddrWeakObj, PtrToIdTy); 2436ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall return B.CreateCall(WeakReadFn, AddrWeakObj); 24376dc2317b59cb1180a59f6c283d96b7a5dfeb5307Fariborz Jahanian} 24386dc2317b59cb1180a59f6c283d96b7a5dfeb5307Fariborz Jahanian 24399f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitObjCWeakAssign(CodeGenFunction &CGF, 24401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *src, llvm::Value *dst) { 2441ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall CGBuilderTy B = CGF.Builder; 2442ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall src = EnforceType(B, src, IdTy); 2443ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall dst = EnforceType(B, dst, PtrToIdTy); 2444ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall B.CreateCall2(WeakAssignFn, src, dst); 24453e283e344595e0bd499b13b30a92b7d9c10a2140Fariborz Jahanian} 24463e283e344595e0bd499b13b30a92b7d9c10a2140Fariborz Jahanian 24479f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitObjCGlobalAssign(CodeGenFunction &CGF, 2448021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian llvm::Value *src, llvm::Value *dst, 2449021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian bool threadlocal) { 2450ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall CGBuilderTy B = CGF.Builder; 2451ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall src = EnforceType(B, src, IdTy); 2452ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall dst = EnforceType(B, dst, PtrToIdTy); 2453021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian if (!threadlocal) 2454021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian B.CreateCall2(GlobalAssignFn, src, dst); 2455021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian else 2456021a7a63984f0f912dc9e9dae2a1b3e1509a40ceFariborz Jahanian // FIXME. Add threadloca assign API 2457b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("EmitObjCGlobalAssign - Threal Local API NYI"); 245858626500527695865683d1d65053743de8770b60Fariborz Jahanian} 245958626500527695865683d1d65053743de8770b60Fariborz Jahanian 24609f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitObjCIvarAssign(CodeGenFunction &CGF, 24616c7a1f364796ce1acb988714e9e42076d1ce332eFariborz Jahanian llvm::Value *src, llvm::Value *dst, 24626c7a1f364796ce1acb988714e9e42076d1ce332eFariborz Jahanian llvm::Value *ivarOffset) { 2463ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall CGBuilderTy B = CGF.Builder; 2464ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall src = EnforceType(B, src, IdTy); 2465b44eda31a214ad88616acbe28c3f0a70268adc6cDavid Chisnall dst = EnforceType(B, dst, IdTy); 2466ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall B.CreateCall3(IvarAssignFn, src, dst, ivarOffset); 24677eda8367cf63caee8acf907356b1d199ccaa6e89Fariborz Jahanian} 24687eda8367cf63caee8acf907356b1d199ccaa6e89Fariborz Jahanian 24699f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitObjCStrongCastAssign(CodeGenFunction &CGF, 24701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *src, llvm::Value *dst) { 2471ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall CGBuilderTy B = CGF.Builder; 2472ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall src = EnforceType(B, src, IdTy); 2473ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall dst = EnforceType(B, dst, PtrToIdTy); 2474ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall B.CreateCall2(StrongCastAssignFn, src, dst); 247558626500527695865683d1d65053743de8770b60Fariborz Jahanian} 247658626500527695865683d1d65053743de8770b60Fariborz Jahanian 24779f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallvoid CGObjCGNU::EmitGCMemmoveCollectable(CodeGenFunction &CGF, 24781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *DestPtr, 2479082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian llvm::Value *SrcPtr, 248055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *Size) { 2481ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall CGBuilderTy B = CGF.Builder; 248268e5e1331d99140ae5dd7b27c3dd28618827dfc8David Chisnall DestPtr = EnforceType(B, DestPtr, PtrTy); 248368e5e1331d99140ae5dd7b27c3dd28618827dfc8David Chisnall SrcPtr = EnforceType(B, SrcPtr, PtrTy); 2484ef6e0f3218b64d8ea3b8b57ee657fec8da228a43David Chisnall 248555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian B.CreateCall3(MemMoveFn, DestPtr, SrcPtr, Size); 2486082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian} 2487082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian 24889cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanianllvm::GlobalVariable *CGObjCGNU::ObjCIvarOffsetVariable( 24899cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian const ObjCInterfaceDecl *ID, 24909cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian const ObjCIvarDecl *Ivar) { 24919cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian const std::string Name = "__objc_ivar_offset_" + ID->getNameAsString() 24929cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian + '.' + Ivar->getNameAsString(); 24939cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian // Emit the variable and initialize it with what we think the correct value 24949cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian // is. This allows code compiled with non-fragile ivars to work correctly 24959cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian // when linked against code which isn't (most of the time). 24968a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::GlobalVariable *IvarOffsetPointer = TheModule.getNamedGlobal(Name); 24978a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall if (!IvarOffsetPointer) { 2498e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // This will cause a run-time crash if we accidentally use it. A value of 2499e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // 0 would seem more sensible, but will silently overwrite the isa pointer 2500e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // causing a great deal of confusion. 2501e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall uint64_t Offset = -1; 2502e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // We can't call ComputeIvarBaseOffset() here if we have the 2503e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // implementation, because it will create an invalid ASTRecordLayout object 2504e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // that we are then stuck with forever, so we only initialize the ivar 2505e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // offset variable with a guess if we only have the interface. The 2506e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // initializer will be reset later anyway, when we are generating the class 2507e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall // description. 2508e0d987626cc11317b36d6d3cc148c9a9d4b35850David Chisnall if (!CGM.getContext().getObjCImplementation( 2509cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman const_cast<ObjCInterfaceDecl *>(ID))) 2510d901da531433254210a08e8b1f9e1ad049b340aaDavid Chisnall Offset = ComputeIvarBaseOffset(CGM, ID, Ivar); 2511d901da531433254210a08e8b1f9e1ad049b340aaDavid Chisnall 251249de5289acea91c9d224c9aadd4d527e8f9fdaffDavid Chisnall llvm::ConstantInt *OffsetGuess = llvm::ConstantInt::get(Int32Ty, Offset, 2513243f108a7c5dc4733e9ef6b7b7c2cd0465cf2104Richard Trieu /*isSigned*/true); 25148a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // Don't emit the guess in non-PIC code because the linker will not be able 25158a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // to replace it with the real version for a library. In non-PIC code you 25168a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall // must compile with the fragile ABI if you want to use ivars from a 25171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // GCC-compiled class. 25188a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall if (CGM.getLangOptions().PICLevel) { 25198a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::GlobalVariable *IvarOffsetGV = new llvm::GlobalVariable(TheModule, 2520917b28b980a8300ce9c7c8d71b2a77bb93b7cdd2David Chisnall Int32Ty, false, 25218a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall llvm::GlobalValue::PrivateLinkage, OffsetGuess, Name+".guess"); 25228a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall IvarOffsetPointer = new llvm::GlobalVariable(TheModule, 25238a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall IvarOffsetGV->getType(), false, llvm::GlobalValue::LinkOnceAnyLinkage, 25248a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall IvarOffsetGV, Name); 25258a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall } else { 25268a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall IvarOffsetPointer = new llvm::GlobalVariable(TheModule, 25273c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer llvm::Type::getInt32PtrTy(VMContext), false, 25283c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer llvm::GlobalValue::ExternalLinkage, 0, Name); 25298a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall } 25309cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian } 25318a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall return IvarOffsetPointer; 25329cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian} 25339cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian 25349f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallLValue CGObjCGNU::EmitObjCValueForIvar(CodeGenFunction &CGF, 2535598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian QualType ObjectTy, 2536598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian llvm::Value *BaseValue, 2537598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian const ObjCIvarDecl *Ivar, 2538598d3f61b6ca854e9d3c2f3359e24468502a61aaFariborz Jahanian unsigned CVRQualifiers) { 2539c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall const ObjCInterfaceDecl *ID = 2540c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall ObjectTy->getAs<ObjCObjectType>()->getInterface(); 25419777687562c338601c2f17906e65e1c1a0aad96fDaniel Dunbar return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers, 25429777687562c338601c2f17906e65e1c1a0aad96fDaniel Dunbar EmitIvarOffset(CGF, ID, Ivar)); 25430bb20361a321593887f067515dd04cf109f4c74aFariborz Jahanian} 2544bb1c8600218b3244340331165fc7cba7bf227655Mike Stump 25459cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanianstatic const ObjCInterfaceDecl *FindIvarInterface(ASTContext &Context, 25469cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian const ObjCInterfaceDecl *OID, 25479cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian const ObjCIvarDecl *OIVD) { 2548db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *next = OID->all_declared_ivar_begin(); next; 2549db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose next = next->getNextIvar()) { 2550db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose if (OIVD == next) 25519cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian return OID; 25529cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian } 25531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25549cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian // Otherwise check in the super class. 25559cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian if (const ObjCInterfaceDecl *Super = OID->getSuperClass()) 25569cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian return FindIvarInterface(Context, Super, OIVD); 25571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25589cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian return 0; 25599cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian} 25600bb20361a321593887f067515dd04cf109f4c74aFariborz Jahanian 25619f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallllvm::Value *CGObjCGNU::EmitIvarOffset(CodeGenFunction &CGF, 25622a03192a02dbf4fdff438d1e658356bde871aba4Daniel Dunbar const ObjCInterfaceDecl *Interface, 2563f63aa3fd429cdb9145d78f0b656bc78754efedb9Fariborz Jahanian const ObjCIvarDecl *Ivar) { 25648a5a9aaddb627c0884c2ed8db55cc29fdb601195David Chisnall if (CGM.getLangOptions().ObjCNonFragileABI) { 25659cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian Interface = FindIvarInterface(CGM.getContext(), Interface, Ivar); 256663ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall if (RuntimeVersion < 10) 256763ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall return CGF.Builder.CreateZExtOrBitCast( 256863ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall CGF.Builder.CreateLoad(CGF.Builder.CreateLoad( 256963ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall ObjCIvarOffsetVariable(Interface, Ivar), false, "ivar")), 257063ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall PtrDiffTy); 257163ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall std::string name = "__objc_ivar_offset_value_" + 257263ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall Interface->getNameAsString() +"." + Ivar->getNameAsString(); 257363ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall llvm::Value *Offset = TheModule.getGlobalVariable(name); 257463ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall if (!Offset) 257563ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall Offset = new llvm::GlobalVariable(TheModule, IntTy, 25763fc81d32314eca98b51846f493a8bc77cf14a701David Chisnall false, llvm::GlobalValue::LinkOnceAnyLinkage, 25773fc81d32314eca98b51846f493a8bc77cf14a701David Chisnall llvm::Constant::getNullValue(IntTy), name); 257863ff703393543904046462aee2ac0a53b8937a3eDavid Chisnall return CGF.Builder.CreateLoad(Offset); 25799cd96ff7dfcb51fdba03df8803fff6cc36e9633fFariborz Jahanian } 25809777687562c338601c2f17906e65e1c1a0aad96fDaniel Dunbar uint64_t Offset = ComputeIvarBaseOffset(CGF.CGM, Interface, Ivar); 2581243f108a7c5dc4733e9ef6b7b7c2cd0465cf2104Richard Trieu return llvm::ConstantInt::get(PtrDiffTy, Offset, /*isSigned*/true); 2582f63aa3fd429cdb9145d78f0b656bc78754efedb9Fariborz Jahanian} 2583f63aa3fd429cdb9145d78f0b656bc78754efedb9Fariborz Jahanian 25849f6614e3c5d34998dd5a5cc6faf0746dcd611d49David ChisnallCGObjCRuntime * 25859f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnallclang::CodeGen::CreateGNUObjCRuntime(CodeGenModule &CGM) { 25869f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall if (CGM.getLangOptions().ObjCNonFragileABI) 25879f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return new CGObjCGNUstep(CGM); 25889f6614e3c5d34998dd5a5cc6faf0746dcd611d49David Chisnall return new CGObjCGCC(CGM); 25890f984268b05edab2cc555a427c441baa9c252658Chris Lattner} 2590