Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1 | //===------- CGObjCGNU.cpp - Emit LLVM Code from ASTs for a Module --------===// |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
Chris Lattner | fc8f0e1 | 2011-04-15 05:22:18 +0000 | [diff] [blame] | 10 | // This provides Objective-C code generation targeting the GNU runtime. The |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 11 | // class in this file generates structures used by the GNU Objective-C runtime |
| 12 | // library. These structures are defined in objc/objc.h and objc/objc-api.h in |
| 13 | // the GNU runtime distribution. |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 14 | // |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | |
| 17 | #include "CGObjCRuntime.h" |
John McCall | 36f893c | 2011-01-28 11:13:47 +0000 | [diff] [blame] | 18 | #include "CGCleanup.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 19 | #include "CodeGenFunction.h" |
| 20 | #include "CodeGenModule.h" |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 21 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 22 | #include "clang/AST/Decl.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 23 | #include "clang/AST/DeclObjC.h" |
Anders Carlsson | 19cc4ab | 2009-07-18 19:43:29 +0000 | [diff] [blame] | 24 | #include "clang/AST/RecordLayout.h" |
Chris Lattner | 16f0049 | 2009-04-26 01:32:48 +0000 | [diff] [blame] | 25 | #include "clang/AST/StmtObjC.h" |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 26 | #include "clang/Basic/FileManager.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 27 | #include "clang/Basic/SourceManager.h" |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 28 | #include "llvm/ADT/SmallVector.h" |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 29 | #include "llvm/ADT/StringMap.h" |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 30 | #include "llvm/IR/CallSite.h" |
Chandler Carruth | 3b844ba | 2013-01-02 11:45:17 +0000 | [diff] [blame] | 31 | #include "llvm/IR/DataLayout.h" |
| 32 | #include "llvm/IR/Intrinsics.h" |
| 33 | #include "llvm/IR/LLVMContext.h" |
| 34 | #include "llvm/IR/Module.h" |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 35 | #include "llvm/Support/Compiler.h" |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 36 | #include <cstdarg> |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 37 | |
Chris Lattner | dce1406 | 2008-06-26 04:19:03 +0000 | [diff] [blame] | 38 | using namespace clang; |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 39 | using namespace CodeGen; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 40 | |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 41 | namespace { |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 42 | /// Class that lazily initialises the runtime function. Avoids inserting the |
| 43 | /// types and the function declaration into a module if they're not used, and |
| 44 | /// avoids constructing the type more than once if it's used more than once. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 45 | class LazyRuntimeFunction { |
| 46 | CodeGenModule *CGM; |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 47 | llvm::FunctionType *FTy; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 48 | const char *FunctionName; |
David Chisnall | 789ecde | 2011-05-23 22:33:28 +0000 | [diff] [blame] | 49 | llvm::Constant *Function; |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 50 | |
| 51 | public: |
| 52 | /// Constructor leaves this class uninitialized, because it is intended to |
| 53 | /// be used as a field in another class and not all of the types that are |
| 54 | /// used as arguments will necessarily be available at construction time. |
| 55 | LazyRuntimeFunction() |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 56 | : CGM(nullptr), FunctionName(nullptr), Function(nullptr) {} |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 57 | |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 58 | /// Initialises the lazy function with the name, return type, and the types |
| 59 | /// of the arguments. |
| 60 | LLVM_END_WITH_NULL |
| 61 | void init(CodeGenModule *Mod, const char *name, llvm::Type *RetTy, ...) { |
| 62 | CGM = Mod; |
| 63 | FunctionName = name; |
| 64 | Function = nullptr; |
| 65 | std::vector<llvm::Type *> ArgTys; |
| 66 | va_list Args; |
| 67 | va_start(Args, RetTy); |
| 68 | while (llvm::Type *ArgTy = va_arg(Args, llvm::Type *)) |
| 69 | ArgTys.push_back(ArgTy); |
| 70 | va_end(Args); |
| 71 | FTy = llvm::FunctionType::get(RetTy, ArgTys, false); |
| 72 | } |
David Chisnall | 5f0bcc4 | 2011-05-23 23:15:11 +0000 | [diff] [blame] | 73 | |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 74 | llvm::FunctionType *getType() { return FTy; } |
| 75 | |
| 76 | /// Overloaded cast operator, allows the class to be implicitly cast to an |
| 77 | /// LLVM constant. |
| 78 | operator llvm::Constant *() { |
| 79 | if (!Function) { |
| 80 | if (!FunctionName) |
| 81 | return nullptr; |
| 82 | Function = |
| 83 | cast<llvm::Constant>(CGM->CreateRuntimeFunction(FTy, FunctionName)); |
| 84 | } |
| 85 | return Function; |
| 86 | } |
| 87 | operator llvm::Function *() { |
| 88 | return cast<llvm::Function>((llvm::Constant *)*this); |
| 89 | } |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 93 | /// GNU Objective-C runtime code generation. This class implements the parts of |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 94 | /// Objective-C support that are specific to the GNU family of runtimes (GCC, |
| 95 | /// GNUstep and ObjFW). |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 96 | class CGObjCGNU : public CGObjCRuntime { |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 97 | protected: |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 98 | /// The LLVM module into which output is inserted |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 99 | llvm::Module &TheModule; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 100 | /// strut objc_super. Used for sending messages to super. This structure |
| 101 | /// contains the receiver (object) and the expected class. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 102 | llvm::StructType *ObjCSuperTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 103 | /// struct objc_super*. The type of the argument to the superclass message |
| 104 | /// lookup functions. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 105 | llvm::PointerType *PtrToObjCSuperTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 106 | /// LLVM type for selectors. Opaque pointer (i8*) unless a header declaring |
| 107 | /// SEL is included in a header somewhere, in which case it will be whatever |
| 108 | /// type is declared in that header, most likely {i8*, i8*}. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 109 | llvm::PointerType *SelectorTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 110 | /// LLVM i8 type. Cached here to avoid repeatedly getting it in all of the |
| 111 | /// places where it's used |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 112 | llvm::IntegerType *Int8Ty; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 113 | /// Pointer to i8 - LLVM type of char*, for all of the places where the |
| 114 | /// runtime needs to deal with C strings. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 115 | llvm::PointerType *PtrToInt8Ty; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 116 | /// Instance Method Pointer type. This is a pointer to a function that takes, |
| 117 | /// at a minimum, an object and a selector, and is the generic type for |
| 118 | /// Objective-C methods. Due to differences between variadic / non-variadic |
| 119 | /// calling conventions, it must always be cast to the correct type before |
| 120 | /// actually being used. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 121 | llvm::PointerType *IMPTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 122 | /// Type of an untyped Objective-C object. Clang treats id as a built-in type |
| 123 | /// when compiling Objective-C code, so this may be an opaque pointer (i8*), |
| 124 | /// but if the runtime header declaring it is included then it may be a |
| 125 | /// pointer to a structure. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 126 | llvm::PointerType *IdTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 127 | /// Pointer to a pointer to an Objective-C object. Used in the new ABI |
| 128 | /// message lookup function and some GC-related functions. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 129 | llvm::PointerType *PtrToIdTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 130 | /// The clang type of id. Used when using the clang CGCall infrastructure to |
| 131 | /// call Objective-C methods. |
John McCall | ead608a | 2010-02-26 00:48:12 +0000 | [diff] [blame] | 132 | CanQualType ASTIdTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 133 | /// LLVM type for C int type. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 134 | llvm::IntegerType *IntTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 135 | /// LLVM type for an opaque pointer. This is identical to PtrToInt8Ty, but is |
| 136 | /// used in the code to document the difference between i8* meaning a pointer |
| 137 | /// to a C string and i8* meaning a pointer to some opaque type. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 138 | llvm::PointerType *PtrTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 139 | /// LLVM type for C long type. The runtime uses this in a lot of places where |
| 140 | /// it should be using intptr_t, but we can't fix this without breaking |
| 141 | /// compatibility with GCC... |
Jay Foad | ef6de3d | 2011-07-11 09:56:20 +0000 | [diff] [blame] | 142 | llvm::IntegerType *LongTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 143 | /// LLVM type for C size_t. Used in various runtime data structures. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 144 | llvm::IntegerType *SizeTy; |
David Chisnall | 49de528 | 2011-10-08 08:54:36 +0000 | [diff] [blame] | 145 | /// LLVM type for C intptr_t. |
| 146 | llvm::IntegerType *IntPtrTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 147 | /// LLVM type for C ptrdiff_t. Mainly used in property accessor functions. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 148 | llvm::IntegerType *PtrDiffTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 149 | /// LLVM type for C int*. Used for GCC-ABI-compatible non-fragile instance |
| 150 | /// variables. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 151 | llvm::PointerType *PtrToIntTy; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 152 | /// LLVM type for Objective-C BOOL type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 153 | llvm::Type *BoolTy; |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 154 | /// 32-bit integer type, to save us needing to look it up every time it's used. |
| 155 | llvm::IntegerType *Int32Ty; |
| 156 | /// 64-bit integer type, to save us needing to look it up every time it's used. |
| 157 | llvm::IntegerType *Int64Ty; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 158 | /// Metadata kind used to tie method lookups to message sends. The GNUstep |
| 159 | /// runtime provides some LLVM passes that can use this to do things like |
| 160 | /// automatic IMP caching and speculative inlining. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 161 | unsigned msgSendMDKind; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 162 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 163 | /// Helper function that generates a constant string and returns a pointer to |
| 164 | /// the start of the string. The result of this function can be used anywhere |
| 165 | /// where the C code specifies const char*. |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 166 | llvm::Constant *MakeConstantString(const std::string &Str, |
| 167 | const std::string &Name="") { |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 168 | ConstantAddress Array = CGM.GetAddrOfConstantCString(Str, Name.c_str()); |
| 169 | return llvm::ConstantExpr::getGetElementPtr(Array.getElementType(), |
| 170 | Array.getPointer(), Zeros); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 171 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 172 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 173 | /// Emits a linkonce_odr string, whose name is the prefix followed by the |
| 174 | /// string value. This allows the linker to combine the strings between |
| 175 | /// different modules. Used for EH typeinfo names, selector strings, and a |
| 176 | /// few other things. |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 177 | llvm::Constant *ExportUniqueString(const std::string &Str, |
| 178 | const std::string prefix) { |
| 179 | std::string name = prefix + Str; |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 180 | auto *ConstStr = TheModule.getGlobalVariable(name); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 181 | if (!ConstStr) { |
Chris Lattner | 9401069 | 2012-02-05 02:30:40 +0000 | [diff] [blame] | 182 | llvm::Constant *value = llvm::ConstantDataArray::getString(VMContext,Str); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 183 | ConstStr = new llvm::GlobalVariable(TheModule, value->getType(), true, |
| 184 | llvm::GlobalValue::LinkOnceODRLinkage, value, prefix + Str); |
| 185 | } |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 186 | return llvm::ConstantExpr::getGetElementPtr(ConstStr->getValueType(), |
| 187 | ConstStr, Zeros); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 188 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 189 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 190 | /// Generates a global structure, initialized by the elements in the vector. |
| 191 | /// The element types must match the types of the structure elements in the |
| 192 | /// first argument. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 193 | llvm::GlobalVariable *MakeGlobal(llvm::StructType *Ty, |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 194 | ArrayRef<llvm::Constant *> V, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 195 | CharUnits Align, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 196 | StringRef Name="", |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 197 | llvm::GlobalValue::LinkageTypes linkage |
| 198 | =llvm::GlobalValue::InternalLinkage) { |
| 199 | llvm::Constant *C = llvm::ConstantStruct::get(Ty, V); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 200 | auto GV = new llvm::GlobalVariable(TheModule, Ty, false, |
| 201 | linkage, C, Name); |
| 202 | GV->setAlignment(Align.getQuantity()); |
| 203 | return GV; |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 204 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 205 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 206 | /// Generates a global array. The vector must contain the same number of |
| 207 | /// elements that the array type declares, of the type specified as the array |
| 208 | /// element type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 209 | llvm::GlobalVariable *MakeGlobal(llvm::ArrayType *Ty, |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 210 | ArrayRef<llvm::Constant *> V, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 211 | CharUnits Align, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 212 | StringRef Name="", |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 213 | llvm::GlobalValue::LinkageTypes linkage |
| 214 | =llvm::GlobalValue::InternalLinkage) { |
| 215 | llvm::Constant *C = llvm::ConstantArray::get(Ty, V); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 216 | auto GV = new llvm::GlobalVariable(TheModule, Ty, false, |
| 217 | linkage, C, Name); |
| 218 | GV->setAlignment(Align.getQuantity()); |
| 219 | return GV; |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 220 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 221 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 222 | /// Generates a global array, inferring the array type from the specified |
| 223 | /// element type and the size of the initialiser. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 224 | llvm::GlobalVariable *MakeGlobalArray(llvm::Type *Ty, |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 225 | ArrayRef<llvm::Constant *> V, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 226 | CharUnits Align, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 227 | StringRef Name="", |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 228 | llvm::GlobalValue::LinkageTypes linkage |
| 229 | =llvm::GlobalValue::InternalLinkage) { |
| 230 | llvm::ArrayType *ArrayTy = llvm::ArrayType::get(Ty, V.size()); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 231 | return MakeGlobal(ArrayTy, V, Align, Name, linkage); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 232 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 233 | |
David Chisnall | 891dac7 | 2012-10-16 15:11:55 +0000 | [diff] [blame] | 234 | /// Returns a property name and encoding string. |
| 235 | llvm::Constant *MakePropertyEncodingString(const ObjCPropertyDecl *PD, |
| 236 | const Decl *Container) { |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 237 | const ObjCRuntime &R = CGM.getLangOpts().ObjCRuntime; |
David Chisnall | 891dac7 | 2012-10-16 15:11:55 +0000 | [diff] [blame] | 238 | if ((R.getKind() == ObjCRuntime::GNUstep) && |
| 239 | (R.getVersion() >= VersionTuple(1, 6))) { |
| 240 | std::string NameAndAttributes; |
| 241 | std::string TypeStr; |
| 242 | CGM.getContext().getObjCEncodingForPropertyDecl(PD, Container, TypeStr); |
| 243 | NameAndAttributes += '\0'; |
| 244 | NameAndAttributes += TypeStr.length() + 3; |
| 245 | NameAndAttributes += TypeStr; |
| 246 | NameAndAttributes += '\0'; |
| 247 | NameAndAttributes += PD->getNameAsString(); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 248 | return MakeConstantString(NameAndAttributes); |
David Chisnall | 891dac7 | 2012-10-16 15:11:55 +0000 | [diff] [blame] | 249 | } |
| 250 | return MakeConstantString(PD->getNameAsString()); |
| 251 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 252 | |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 253 | /// Push the property attributes into two structure fields. |
| 254 | void PushPropertyAttributes(std::vector<llvm::Constant*> &Fields, |
| 255 | ObjCPropertyDecl *property, bool isSynthesized=true, bool |
| 256 | isDynamic=true) { |
| 257 | int attrs = property->getPropertyAttributes(); |
| 258 | // For read-only properties, clear the copy and retain flags |
| 259 | if (attrs & ObjCPropertyDecl::OBJC_PR_readonly) { |
| 260 | attrs &= ~ObjCPropertyDecl::OBJC_PR_copy; |
| 261 | attrs &= ~ObjCPropertyDecl::OBJC_PR_retain; |
| 262 | attrs &= ~ObjCPropertyDecl::OBJC_PR_weak; |
| 263 | attrs &= ~ObjCPropertyDecl::OBJC_PR_strong; |
| 264 | } |
| 265 | // The first flags field has the same attribute values as clang uses internally |
| 266 | Fields.push_back(llvm::ConstantInt::get(Int8Ty, attrs & 0xff)); |
| 267 | attrs >>= 8; |
| 268 | attrs <<= 2; |
| 269 | // For protocol properties, synthesized and dynamic have no meaning, so we |
| 270 | // reuse these flags to indicate that this is a protocol property (both set |
| 271 | // has no meaning, as a property can't be both synthesized and dynamic) |
| 272 | attrs |= isSynthesized ? (1<<0) : 0; |
| 273 | attrs |= isDynamic ? (1<<1) : 0; |
| 274 | // The second field is the next four fields left shifted by two, with the |
| 275 | // low bit set to indicate whether the field is synthesized or dynamic. |
| 276 | Fields.push_back(llvm::ConstantInt::get(Int8Ty, attrs & 0xff)); |
| 277 | // Two padding fields |
| 278 | Fields.push_back(llvm::ConstantInt::get(Int8Ty, 0)); |
| 279 | Fields.push_back(llvm::ConstantInt::get(Int8Ty, 0)); |
| 280 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 281 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 282 | /// Ensures that the value has the required type, by inserting a bitcast if |
| 283 | /// required. This function lets us avoid inserting bitcasts that are |
| 284 | /// redundant. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 285 | llvm::Value* EnforceType(CGBuilderTy &B, llvm::Value *V, llvm::Type *Ty) { |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 286 | if (V->getType() == Ty) return V; |
| 287 | return B.CreateBitCast(V, Ty); |
| 288 | } |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 289 | Address EnforceType(CGBuilderTy &B, Address V, llvm::Type *Ty) { |
| 290 | if (V.getType() == Ty) return V; |
| 291 | return B.CreateBitCast(V, Ty); |
| 292 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 293 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 294 | // Some zeros used for GEPs in lots of places. |
| 295 | llvm::Constant *Zeros[2]; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 296 | /// Null pointer value. Mainly used as a terminator in various arrays. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 297 | llvm::Constant *NULLPtr; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 298 | /// LLVM context. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 299 | llvm::LLVMContext &VMContext; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 300 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 301 | private: |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 302 | /// Placeholder for the class. Lots of things refer to the class before we've |
| 303 | /// actually emitted it. We use this alias as a placeholder, and then replace |
| 304 | /// it with a pointer to the class structure before finally emitting the |
| 305 | /// module. |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 306 | llvm::GlobalAlias *ClassPtrAlias; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 307 | /// Placeholder for the metaclass. Lots of things refer to the class before |
| 308 | /// we've / actually emitted it. We use this alias as a placeholder, and then |
| 309 | /// replace / it with a pointer to the metaclass structure before finally |
| 310 | /// emitting the / module. |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 311 | llvm::GlobalAlias *MetaClassPtrAlias; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 312 | /// All of the classes that have been generated for this compilation units. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 313 | std::vector<llvm::Constant*> Classes; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 314 | /// All of the categories that have been generated for this compilation units. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 315 | std::vector<llvm::Constant*> Categories; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 316 | /// All of the Objective-C constant strings that have been generated for this |
| 317 | /// compilation units. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 318 | std::vector<llvm::Constant*> ConstantStrings; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 319 | /// Map from string values to Objective-C constant strings in the output. |
| 320 | /// Used to prevent emitting Objective-C strings more than once. This should |
| 321 | /// not be required at all - CodeGenModule should manage this list. |
David Chisnall | 48272a0 | 2010-01-27 12:49:23 +0000 | [diff] [blame] | 322 | llvm::StringMap<llvm::Constant*> ObjCStrings; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 323 | /// All of the protocols that have been declared. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 324 | llvm::StringMap<llvm::Constant*> ExistingProtocols; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 325 | /// For each variant of a selector, we store the type encoding and a |
| 326 | /// placeholder value. For an untyped selector, the type will be the empty |
| 327 | /// string. Selector references are all done via the module's selector table, |
| 328 | /// so we create an alias as a placeholder and then replace it with the real |
| 329 | /// value later. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 330 | typedef std::pair<std::string, llvm::GlobalAlias*> TypedSelector; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 331 | /// Type of the selector map. This is roughly equivalent to the structure |
| 332 | /// used in the GNUstep runtime, which maintains a list of all of the valid |
| 333 | /// types for a selector in a table. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 334 | typedef llvm::DenseMap<Selector, SmallVector<TypedSelector, 2> > |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 335 | SelectorMap; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 336 | /// A map from selectors to selector types. This allows us to emit all |
| 337 | /// selectors of the same name and type together. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 338 | SelectorMap SelectorTable; |
| 339 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 340 | /// Selectors related to memory management. When compiling in GC mode, we |
| 341 | /// omit these. |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 342 | Selector RetainSel, ReleaseSel, AutoreleaseSel; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 343 | /// Runtime functions used for memory management in GC mode. Note that clang |
| 344 | /// supports code generation for calling these functions, but neither GNU |
| 345 | /// runtime actually supports this API properly yet. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 346 | LazyRuntimeFunction IvarAssignFn, StrongCastAssignFn, MemMoveFn, WeakReadFn, |
| 347 | WeakAssignFn, GlobalAssignFn; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 348 | |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 349 | typedef std::pair<std::string, std::string> ClassAliasPair; |
| 350 | /// All classes that have aliases set for them. |
| 351 | std::vector<ClassAliasPair> ClassAliases; |
| 352 | |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 353 | protected: |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 354 | /// Function used for throwing Objective-C exceptions. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 355 | LazyRuntimeFunction ExceptionThrowFn; |
James Dennett | 809d1be | 2012-06-13 22:07:09 +0000 | [diff] [blame] | 356 | /// Function used for rethrowing exceptions, used at the end of \@finally or |
| 357 | /// \@synchronize blocks. |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 358 | LazyRuntimeFunction ExceptionReThrowFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 359 | /// Function called when entering a catch function. This is required for |
| 360 | /// differentiating Objective-C exceptions and foreign exceptions. |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 361 | LazyRuntimeFunction EnterCatchFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 362 | /// Function called when exiting from a catch block. Used to do exception |
| 363 | /// cleanup. |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 364 | LazyRuntimeFunction ExitCatchFn; |
James Dennett | 809d1be | 2012-06-13 22:07:09 +0000 | [diff] [blame] | 365 | /// Function called when entering an \@synchronize block. Acquires the lock. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 366 | LazyRuntimeFunction SyncEnterFn; |
James Dennett | 809d1be | 2012-06-13 22:07:09 +0000 | [diff] [blame] | 367 | /// Function called when exiting an \@synchronize block. Releases the lock. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 368 | LazyRuntimeFunction SyncExitFn; |
| 369 | |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 370 | private: |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 371 | /// Function called if fast enumeration detects that the collection is |
| 372 | /// modified during the update. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 373 | LazyRuntimeFunction EnumerationMutationFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 374 | /// Function for implementing synthesized property getters that return an |
| 375 | /// object. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 376 | LazyRuntimeFunction GetPropertyFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 377 | /// Function for implementing synthesized property setters that return an |
| 378 | /// object. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 379 | LazyRuntimeFunction SetPropertyFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 380 | /// Function used for non-object declared property getters. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 381 | LazyRuntimeFunction GetStructPropertyFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 382 | /// Function used for non-object declared property setters. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 383 | LazyRuntimeFunction SetStructPropertyFn; |
| 384 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 385 | /// The version of the runtime that this class targets. Must match the |
| 386 | /// version in the runtime. |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 387 | int RuntimeVersion; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 388 | /// The version of the protocol class. Used to differentiate between ObjC1 |
| 389 | /// and ObjC2 protocols. Objective-C 1 protocols can not contain optional |
| 390 | /// components and can not contain declared properties. We always emit |
| 391 | /// Objective-C 2 property structures, but we have to pretend that they're |
| 392 | /// Objective-C 1 property structures when targeting the GCC runtime or it |
| 393 | /// will abort. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 394 | const int ProtocolVersion; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 395 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 396 | /// Generates an instance variable list structure. This is a structure |
| 397 | /// containing a size and an array of structures containing instance variable |
| 398 | /// metadata. This is used purely for introspection in the fragile ABI. In |
| 399 | /// the non-fragile ABI, it's used for instance variable fixup. |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 400 | llvm::Constant *GenerateIvarList(ArrayRef<llvm::Constant *> IvarNames, |
| 401 | ArrayRef<llvm::Constant *> IvarTypes, |
| 402 | ArrayRef<llvm::Constant *> IvarOffsets); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 403 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 404 | /// Generates a method list structure. This is a structure containing a size |
| 405 | /// and an array of structures containing method metadata. |
| 406 | /// |
| 407 | /// This structure is used by both classes and categories, and contains a next |
| 408 | /// pointer allowing them to be chained together in a linked list. |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 409 | llvm::Constant *GenerateMethodList(StringRef ClassName, |
| 410 | StringRef CategoryName, |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 411 | ArrayRef<Selector> MethodSels, |
| 412 | ArrayRef<llvm::Constant *> MethodTypes, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 413 | bool isClassMethodList); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 414 | |
James Dennett | 809d1be | 2012-06-13 22:07:09 +0000 | [diff] [blame] | 415 | /// Emits an empty protocol. This is used for \@protocol() where no protocol |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 416 | /// is found. The runtime will (hopefully) fix up the pointer to refer to the |
| 417 | /// real protocol. |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 418 | llvm::Constant *GenerateEmptyProtocol(const std::string &ProtocolName); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 419 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 420 | /// Generates a list of property metadata structures. This follows the same |
| 421 | /// pattern as method and instance variable metadata lists. |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 422 | llvm::Constant *GeneratePropertyList(const ObjCImplementationDecl *OID, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 423 | SmallVectorImpl<Selector> &InstanceMethodSels, |
| 424 | SmallVectorImpl<llvm::Constant*> &InstanceMethodTypes); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 425 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 426 | /// Generates a list of referenced protocols. Classes, categories, and |
| 427 | /// protocols all use this structure. |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 428 | llvm::Constant *GenerateProtocolList(ArrayRef<std::string> Protocols); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 429 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 430 | /// To ensure that all protocols are seen by the runtime, we add a category on |
| 431 | /// a class defined in the runtime, declaring no methods, but adopting the |
| 432 | /// protocols. This is a horribly ugly hack, but it allows us to collect all |
| 433 | /// of the protocols without changing the ABI. |
Dmitri Gribenko | c4a7790 | 2012-11-15 14:28:07 +0000 | [diff] [blame] | 434 | void GenerateProtocolHolderCategory(); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 435 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 436 | /// Generates a class structure. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 437 | llvm::Constant *GenerateClassStructure( |
| 438 | llvm::Constant *MetaClass, |
| 439 | llvm::Constant *SuperClass, |
| 440 | unsigned info, |
Chris Lattner | d002cc6 | 2008-06-26 04:47:04 +0000 | [diff] [blame] | 441 | const char *Name, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 442 | llvm::Constant *Version, |
| 443 | llvm::Constant *InstanceSize, |
| 444 | llvm::Constant *IVars, |
| 445 | llvm::Constant *Methods, |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 446 | llvm::Constant *Protocols, |
| 447 | llvm::Constant *IvarOffsets, |
David Chisnall | 8c757f9 | 2010-04-28 14:29:56 +0000 | [diff] [blame] | 448 | llvm::Constant *Properties, |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 449 | llvm::Constant *StrongIvarBitmap, |
| 450 | llvm::Constant *WeakIvarBitmap, |
David Chisnall | 8c757f9 | 2010-04-28 14:29:56 +0000 | [diff] [blame] | 451 | bool isMeta=false); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 452 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 453 | /// Generates a method list. This is used by protocols to define the required |
| 454 | /// and optional methods. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 455 | llvm::Constant *GenerateProtocolMethodList( |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 456 | ArrayRef<llvm::Constant *> MethodNames, |
| 457 | ArrayRef<llvm::Constant *> MethodTypes); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 458 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 459 | /// Returns a selector with the specified type encoding. An empty string is |
| 460 | /// used to return an untyped selector (with the types field set to NULL). |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 461 | llvm::Value *GetSelector(CodeGenFunction &CGF, Selector Sel, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 462 | const std::string &TypeEncoding); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 463 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 464 | /// Returns the variable used to store the offset of an instance variable. |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 465 | llvm::GlobalVariable *ObjCIvarOffsetVariable(const ObjCInterfaceDecl *ID, |
| 466 | const ObjCIvarDecl *Ivar); |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 467 | /// Emits a reference to a class. This allows the linker to object if there |
| 468 | /// is no class of the matching name. |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 469 | |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 470 | protected: |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 471 | void EmitClassRef(const std::string &className); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 472 | |
David Chisnall | c7aed3b | 2011-06-29 13:16:41 +0000 | [diff] [blame] | 473 | /// Emits a pointer to the named class |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 474 | virtual llvm::Value *GetClassNamed(CodeGenFunction &CGF, |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 475 | const std::string &Name, bool isWeak); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 476 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 477 | /// Looks up the method for sending a message to the specified object. This |
| 478 | /// mechanism differs between the GCC and GNU runtimes, so this method must be |
| 479 | /// overridden in subclasses. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 480 | virtual llvm::Value *LookupIMP(CodeGenFunction &CGF, |
| 481 | llvm::Value *&Receiver, |
| 482 | llvm::Value *cmd, |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 483 | llvm::MDNode *node, |
| 484 | MessageSendInfo &MSI) = 0; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 485 | |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 486 | /// Looks up the method for sending a message to a superclass. This |
| 487 | /// mechanism differs between the GCC and GNU runtimes, so this method must |
| 488 | /// be overridden in subclasses. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 489 | virtual llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 490 | Address ObjCSuper, |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 491 | llvm::Value *cmd, |
| 492 | MessageSendInfo &MSI) = 0; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 493 | |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 494 | /// Libobjc2 uses a bitfield representation where small(ish) bitfields are |
| 495 | /// stored in a 64-bit value with the low bit set to 1 and the remaining 63 |
| 496 | /// bits set to their values, LSB first, while larger ones are stored in a |
| 497 | /// structure of this / form: |
| 498 | /// |
| 499 | /// struct { int32_t length; int32_t values[length]; }; |
| 500 | /// |
| 501 | /// The values in the array are stored in host-endian format, with the least |
| 502 | /// significant bit being assumed to come first in the bitfield. Therefore, |
| 503 | /// a bitfield with the 64th bit set will be (int64_t)&{ 2, [0, 1<<31] }, |
| 504 | /// while a bitfield / with the 63rd bit set will be 1<<64. |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 505 | llvm::Constant *MakeBitField(ArrayRef<bool> bits); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 506 | |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 507 | public: |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 508 | CGObjCGNU(CodeGenModule &cgm, unsigned runtimeABIVersion, |
| 509 | unsigned protocolClassVersion); |
| 510 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 511 | ConstantAddress GenerateConstantString(const StringLiteral *) override; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 512 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 513 | RValue |
| 514 | GenerateMessageSend(CodeGenFunction &CGF, ReturnValueSlot Return, |
| 515 | QualType ResultType, Selector Sel, |
| 516 | llvm::Value *Receiver, const CallArgList &CallArgs, |
David Chisnall | c6cd5fd | 2010-04-28 19:33:36 +0000 | [diff] [blame] | 517 | const ObjCInterfaceDecl *Class, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 518 | const ObjCMethodDecl *Method) override; |
| 519 | RValue |
| 520 | GenerateMessageSendSuper(CodeGenFunction &CGF, ReturnValueSlot Return, |
| 521 | QualType ResultType, Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 522 | const ObjCInterfaceDecl *Class, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 523 | bool isCategoryImpl, llvm::Value *Receiver, |
| 524 | bool IsClassMessage, const CallArgList &CallArgs, |
| 525 | const ObjCMethodDecl *Method) override; |
| 526 | llvm::Value *GetClass(CodeGenFunction &CGF, |
| 527 | const ObjCInterfaceDecl *OID) override; |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 528 | llvm::Value *GetSelector(CodeGenFunction &CGF, Selector Sel) override; |
| 529 | Address GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) override; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 530 | llvm::Value *GetSelector(CodeGenFunction &CGF, |
| 531 | const ObjCMethodDecl *Method) override; |
| 532 | llvm::Constant *GetEHType(QualType T) override; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 533 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 534 | llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD, |
| 535 | const ObjCContainerDecl *CD) override; |
| 536 | void GenerateCategory(const ObjCCategoryImplDecl *CMD) override; |
| 537 | void GenerateClass(const ObjCImplementationDecl *ClassDecl) override; |
| 538 | void RegisterAlias(const ObjCCompatibleAliasDecl *OAD) override; |
| 539 | llvm::Value *GenerateProtocolRef(CodeGenFunction &CGF, |
| 540 | const ObjCProtocolDecl *PD) override; |
| 541 | void GenerateProtocol(const ObjCProtocolDecl *PD) override; |
| 542 | llvm::Function *ModuleInitFunction() override; |
| 543 | llvm::Constant *GetPropertyGetFunction() override; |
| 544 | llvm::Constant *GetPropertySetFunction() override; |
| 545 | llvm::Constant *GetOptimizedPropertySetFunction(bool atomic, |
| 546 | bool copy) override; |
| 547 | llvm::Constant *GetSetStructFunction() override; |
| 548 | llvm::Constant *GetGetStructFunction() override; |
| 549 | llvm::Constant *GetCppAtomicObjectGetFunction() override; |
| 550 | llvm::Constant *GetCppAtomicObjectSetFunction() override; |
| 551 | llvm::Constant *EnumerationMutationFunction() override; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 552 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 553 | void EmitTryStmt(CodeGenFunction &CGF, |
| 554 | const ObjCAtTryStmt &S) override; |
| 555 | void EmitSynchronizedStmt(CodeGenFunction &CGF, |
| 556 | const ObjCAtSynchronizedStmt &S) override; |
| 557 | void EmitThrowStmt(CodeGenFunction &CGF, |
| 558 | const ObjCAtThrowStmt &S, |
| 559 | bool ClearInsertionPoint=true) override; |
| 560 | llvm::Value * EmitObjCWeakRead(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 561 | Address AddrWeakObj) override; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 562 | void EmitObjCWeakAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 563 | llvm::Value *src, Address dst) override; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 564 | void EmitObjCGlobalAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 565 | llvm::Value *src, Address dest, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 566 | bool threadlocal=false) override; |
| 567 | void EmitObjCIvarAssign(CodeGenFunction &CGF, llvm::Value *src, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 568 | Address dest, llvm::Value *ivarOffset) override; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 569 | void EmitObjCStrongCastAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 570 | llvm::Value *src, Address dest) override; |
| 571 | void EmitGCMemmoveCollectable(CodeGenFunction &CGF, Address DestPtr, |
| 572 | Address SrcPtr, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 573 | llvm::Value *Size) override; |
| 574 | LValue EmitObjCValueForIvar(CodeGenFunction &CGF, QualType ObjectTy, |
| 575 | llvm::Value *BaseValue, const ObjCIvarDecl *Ivar, |
| 576 | unsigned CVRQualifiers) override; |
| 577 | llvm::Value *EmitIvarOffset(CodeGenFunction &CGF, |
| 578 | const ObjCInterfaceDecl *Interface, |
| 579 | const ObjCIvarDecl *Ivar) override; |
| 580 | llvm::Value *EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) override; |
| 581 | llvm::Constant *BuildGCBlockLayout(CodeGenModule &CGM, |
| 582 | const CGBlockInfo &blockInfo) override { |
Fariborz Jahanian | 89ecd41 | 2010-08-04 16:57:49 +0000 | [diff] [blame] | 583 | return NULLPtr; |
| 584 | } |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 585 | llvm::Constant *BuildRCBlockLayout(CodeGenModule &CGM, |
| 586 | const CGBlockInfo &blockInfo) override { |
Fariborz Jahanian | c46b435 | 2012-10-27 21:10:38 +0000 | [diff] [blame] | 587 | return NULLPtr; |
| 588 | } |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 589 | |
| 590 | llvm::Constant *BuildByrefLayout(CodeGenModule &CGM, QualType T) override { |
Fariborz Jahanian | 3ca23d7 | 2012-11-14 17:15:51 +0000 | [diff] [blame] | 591 | return NULLPtr; |
| 592 | } |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 593 | |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 594 | llvm::GlobalVariable *GetClassGlobal(StringRef Name, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 595 | bool Weak = false) override { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 596 | return nullptr; |
Fariborz Jahanian | 6f40e22 | 2011-05-17 22:21:16 +0000 | [diff] [blame] | 597 | } |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 598 | }; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 599 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 600 | /// Class representing the legacy GCC Objective-C ABI. This is the default when |
| 601 | /// -fobjc-nonfragile-abi is not specified. |
| 602 | /// |
| 603 | /// The GCC ABI target actually generates code that is approximately compatible |
| 604 | /// with the new GNUstep runtime ABI, but refrains from using any features that |
| 605 | /// would not work with the GCC runtime. For example, clang always generates |
| 606 | /// the extended form of the class structure, and the extra fields are simply |
| 607 | /// ignored by GCC libobjc. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 608 | class CGObjCGCC : public CGObjCGNU { |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 609 | /// The GCC ABI message lookup function. Returns an IMP pointing to the |
| 610 | /// method implementation for this message. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 611 | LazyRuntimeFunction MsgLookupFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 612 | /// The GCC ABI superclass message lookup function. Takes a pointer to a |
| 613 | /// structure describing the receiver and the class, and a selector as |
| 614 | /// arguments. Returns the IMP for the corresponding method. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 615 | LazyRuntimeFunction MsgLookupSuperFn; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 616 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 617 | protected: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 618 | llvm::Value *LookupIMP(CodeGenFunction &CGF, llvm::Value *&Receiver, |
| 619 | llvm::Value *cmd, llvm::MDNode *node, |
| 620 | MessageSendInfo &MSI) override { |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 621 | CGBuilderTy &Builder = CGF.Builder; |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 622 | llvm::Value *args[] = { |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 623 | EnforceType(Builder, Receiver, IdTy), |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 624 | EnforceType(Builder, cmd, SelectorTy) }; |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 625 | llvm::CallSite imp = CGF.EmitRuntimeCallOrInvoke(MsgLookupFn, args); |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 626 | imp->setMetadata(msgSendMDKind, node); |
| 627 | return imp.getInstruction(); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 628 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 629 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 630 | llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, Address ObjCSuper, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 631 | llvm::Value *cmd, MessageSendInfo &MSI) override { |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 632 | CGBuilderTy &Builder = CGF.Builder; |
| 633 | llvm::Value *lookupArgs[] = {EnforceType(Builder, ObjCSuper, |
| 634 | PtrToObjCSuperTy).getPointer(), cmd}; |
| 635 | return CGF.EmitNounwindRuntimeCall(MsgLookupSuperFn, lookupArgs); |
| 636 | } |
| 637 | |
| 638 | public: |
| 639 | CGObjCGCC(CodeGenModule &Mod) : CGObjCGNU(Mod, 8, 2) { |
| 640 | // IMP objc_msg_lookup(id, SEL); |
| 641 | MsgLookupFn.init(&CGM, "objc_msg_lookup", IMPTy, IdTy, SelectorTy, |
| 642 | nullptr); |
| 643 | // IMP objc_msg_lookup_super(struct objc_super*, SEL); |
| 644 | MsgLookupSuperFn.init(&CGM, "objc_msg_lookup_super", IMPTy, |
| 645 | PtrToObjCSuperTy, SelectorTy, nullptr); |
| 646 | } |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 647 | }; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 648 | |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 649 | /// Class used when targeting the new GNUstep runtime ABI. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 650 | class CGObjCGNUstep : public CGObjCGNU { |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 651 | /// The slot lookup function. Returns a pointer to a cacheable structure |
| 652 | /// that contains (among other things) the IMP. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 653 | LazyRuntimeFunction SlotLookupFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 654 | /// The GNUstep ABI superclass message lookup function. Takes a pointer to |
| 655 | /// a structure describing the receiver and the class, and a selector as |
| 656 | /// arguments. Returns the slot for the corresponding method. Superclass |
| 657 | /// message lookup rarely changes, so this is a good caching opportunity. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 658 | LazyRuntimeFunction SlotLookupSuperFn; |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 659 | /// Specialised function for setting atomic retain properties |
| 660 | LazyRuntimeFunction SetPropertyAtomic; |
| 661 | /// Specialised function for setting atomic copy properties |
| 662 | LazyRuntimeFunction SetPropertyAtomicCopy; |
| 663 | /// Specialised function for setting nonatomic retain properties |
| 664 | LazyRuntimeFunction SetPropertyNonAtomic; |
| 665 | /// Specialised function for setting nonatomic copy properties |
| 666 | LazyRuntimeFunction SetPropertyNonAtomicCopy; |
| 667 | /// Function to perform atomic copies of C++ objects with nontrivial copy |
| 668 | /// constructors from Objective-C ivars. |
| 669 | LazyRuntimeFunction CxxAtomicObjectGetFn; |
| 670 | /// Function to perform atomic copies of C++ objects with nontrivial copy |
| 671 | /// constructors to Objective-C ivars. |
| 672 | LazyRuntimeFunction CxxAtomicObjectSetFn; |
David Chisnall | 81a65f5 | 2011-03-26 11:48:37 +0000 | [diff] [blame] | 673 | /// Type of an slot structure pointer. This is returned by the various |
| 674 | /// lookup functions. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 675 | llvm::Type *SlotTy; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 676 | |
John McCall | 2b07dd3 | 2012-11-14 09:08:34 +0000 | [diff] [blame] | 677 | public: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 678 | llvm::Constant *GetEHType(QualType T) override; |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 679 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 680 | protected: |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 681 | llvm::Value *LookupIMP(CodeGenFunction &CGF, llvm::Value *&Receiver, |
| 682 | llvm::Value *cmd, llvm::MDNode *node, |
| 683 | MessageSendInfo &MSI) override { |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 684 | CGBuilderTy &Builder = CGF.Builder; |
| 685 | llvm::Function *LookupFn = SlotLookupFn; |
| 686 | |
| 687 | // Store the receiver on the stack so that we can reload it later |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 688 | Address ReceiverPtr = |
| 689 | CGF.CreateTempAlloca(Receiver->getType(), CGF.getPointerAlign()); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 690 | Builder.CreateStore(Receiver, ReceiverPtr); |
| 691 | |
| 692 | llvm::Value *self; |
| 693 | |
| 694 | if (isa<ObjCMethodDecl>(CGF.CurCodeDecl)) { |
| 695 | self = CGF.LoadObjCSelf(); |
| 696 | } else { |
| 697 | self = llvm::ConstantPointerNull::get(IdTy); |
| 698 | } |
| 699 | |
| 700 | // The lookup function is guaranteed not to capture the receiver pointer. |
| 701 | LookupFn->setDoesNotCapture(1); |
| 702 | |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 703 | llvm::Value *args[] = { |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 704 | EnforceType(Builder, ReceiverPtr.getPointer(), PtrToIdTy), |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 705 | EnforceType(Builder, cmd, SelectorTy), |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 706 | EnforceType(Builder, self, IdTy) }; |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 707 | llvm::CallSite slot = CGF.EmitRuntimeCallOrInvoke(LookupFn, args); |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 708 | slot.setOnlyReadsMemory(); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 709 | slot->setMetadata(msgSendMDKind, node); |
| 710 | |
| 711 | // Load the imp from the slot |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 712 | llvm::Value *imp = Builder.CreateAlignedLoad( |
| 713 | Builder.CreateStructGEP(nullptr, slot.getInstruction(), 4), |
| 714 | CGF.getPointerAlign()); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 715 | |
| 716 | // The lookup function may have changed the receiver, so make sure we use |
| 717 | // the new one. |
| 718 | Receiver = Builder.CreateLoad(ReceiverPtr, true); |
| 719 | return imp; |
| 720 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 721 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 722 | llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, Address ObjCSuper, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 723 | llvm::Value *cmd, |
| 724 | MessageSendInfo &MSI) override { |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 725 | CGBuilderTy &Builder = CGF.Builder; |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 726 | llvm::Value *lookupArgs[] = {ObjCSuper.getPointer(), cmd}; |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 727 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 728 | llvm::CallInst *slot = |
| 729 | CGF.EmitNounwindRuntimeCall(SlotLookupSuperFn, lookupArgs); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 730 | slot->setOnlyReadsMemory(); |
| 731 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 732 | return Builder.CreateAlignedLoad(Builder.CreateStructGEP(nullptr, slot, 4), |
| 733 | CGF.getPointerAlign()); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 734 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 735 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 736 | public: |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 737 | CGObjCGNUstep(CodeGenModule &Mod) : CGObjCGNU(Mod, 9, 3) { |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 738 | const ObjCRuntime &R = CGM.getLangOpts().ObjCRuntime; |
David Chisnall | 65bd4ac | 2013-01-11 15:33:01 +0000 | [diff] [blame] | 739 | |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 740 | llvm::StructType *SlotStructTy = llvm::StructType::get(PtrTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 741 | PtrTy, PtrTy, IntTy, IMPTy, nullptr); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 742 | SlotTy = llvm::PointerType::getUnqual(SlotStructTy); |
| 743 | // Slot_t objc_msg_lookup_sender(id *receiver, SEL selector, id sender); |
| 744 | SlotLookupFn.init(&CGM, "objc_msg_lookup_sender", SlotTy, PtrToIdTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 745 | SelectorTy, IdTy, nullptr); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 746 | // Slot_t objc_msg_lookup_super(struct objc_super*, SEL); |
| 747 | SlotLookupSuperFn.init(&CGM, "objc_slot_lookup_super", SlotTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 748 | PtrToObjCSuperTy, SelectorTy, nullptr); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 749 | // If we're in ObjC++ mode, then we want to make |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 750 | if (CGM.getLangOpts().CPlusPlus) { |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 751 | llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 752 | // void *__cxa_begin_catch(void *e) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 753 | EnterCatchFn.init(&CGM, "__cxa_begin_catch", PtrTy, PtrTy, nullptr); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 754 | // void __cxa_end_catch(void) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 755 | ExitCatchFn.init(&CGM, "__cxa_end_catch", VoidTy, nullptr); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 756 | // void _Unwind_Resume_or_Rethrow(void*) |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 757 | ExceptionReThrowFn.init(&CGM, "_Unwind_Resume_or_Rethrow", VoidTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 758 | PtrTy, nullptr); |
David Chisnall | 65bd4ac | 2013-01-11 15:33:01 +0000 | [diff] [blame] | 759 | } else if (R.getVersion() >= VersionTuple(1, 7)) { |
| 760 | llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); |
| 761 | // id objc_begin_catch(void *e) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 762 | EnterCatchFn.init(&CGM, "objc_begin_catch", IdTy, PtrTy, nullptr); |
David Chisnall | 65bd4ac | 2013-01-11 15:33:01 +0000 | [diff] [blame] | 763 | // void objc_end_catch(void) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 764 | ExitCatchFn.init(&CGM, "objc_end_catch", VoidTy, nullptr); |
David Chisnall | 65bd4ac | 2013-01-11 15:33:01 +0000 | [diff] [blame] | 765 | // void _Unwind_Resume_or_Rethrow(void*) |
| 766 | ExceptionReThrowFn.init(&CGM, "objc_exception_rethrow", VoidTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 767 | PtrTy, nullptr); |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 768 | } |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 769 | llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); |
| 770 | SetPropertyAtomic.init(&CGM, "objc_setProperty_atomic", VoidTy, IdTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 771 | SelectorTy, IdTy, PtrDiffTy, nullptr); |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 772 | SetPropertyAtomicCopy.init(&CGM, "objc_setProperty_atomic_copy", VoidTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 773 | IdTy, SelectorTy, IdTy, PtrDiffTy, nullptr); |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 774 | SetPropertyNonAtomic.init(&CGM, "objc_setProperty_nonatomic", VoidTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 775 | IdTy, SelectorTy, IdTy, PtrDiffTy, nullptr); |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 776 | SetPropertyNonAtomicCopy.init(&CGM, "objc_setProperty_nonatomic_copy", |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 777 | VoidTy, IdTy, SelectorTy, IdTy, PtrDiffTy, nullptr); |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 778 | // void objc_setCppObjectAtomic(void *dest, const void *src, void |
| 779 | // *helper); |
| 780 | CxxAtomicObjectSetFn.init(&CGM, "objc_setCppObjectAtomic", VoidTy, PtrTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 781 | PtrTy, PtrTy, nullptr); |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 782 | // void objc_getCppObjectAtomic(void *dest, const void *src, void |
| 783 | // *helper); |
| 784 | CxxAtomicObjectGetFn.init(&CGM, "objc_getCppObjectAtomic", VoidTy, PtrTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 785 | PtrTy, PtrTy, nullptr); |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 786 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 787 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 788 | llvm::Constant *GetCppAtomicObjectGetFunction() override { |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 789 | // The optimised functions were added in version 1.7 of the GNUstep |
| 790 | // runtime. |
| 791 | assert (CGM.getLangOpts().ObjCRuntime.getVersion() >= |
| 792 | VersionTuple(1, 7)); |
| 793 | return CxxAtomicObjectGetFn; |
| 794 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 795 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 796 | llvm::Constant *GetCppAtomicObjectSetFunction() override { |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 797 | // The optimised functions were added in version 1.7 of the GNUstep |
| 798 | // runtime. |
| 799 | assert (CGM.getLangOpts().ObjCRuntime.getVersion() >= |
| 800 | VersionTuple(1, 7)); |
| 801 | return CxxAtomicObjectSetFn; |
| 802 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 803 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 804 | llvm::Constant *GetOptimizedPropertySetFunction(bool atomic, |
| 805 | bool copy) override { |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 806 | // The optimised property functions omit the GC check, and so are not |
| 807 | // safe to use in GC mode. The standard functions are fast in GC mode, |
| 808 | // so there is less advantage in using them. |
| 809 | assert ((CGM.getLangOpts().getGC() == LangOptions::NonGC)); |
| 810 | // The optimised functions were added in version 1.7 of the GNUstep |
| 811 | // runtime. |
| 812 | assert (CGM.getLangOpts().ObjCRuntime.getVersion() >= |
| 813 | VersionTuple(1, 7)); |
| 814 | |
| 815 | if (atomic) { |
| 816 | if (copy) return SetPropertyAtomicCopy; |
| 817 | return SetPropertyAtomic; |
| 818 | } |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 819 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 820 | return copy ? SetPropertyNonAtomicCopy : SetPropertyNonAtomic; |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 821 | } |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 822 | }; |
| 823 | |
Bill Wendling | 2b3e50e | 2013-11-26 10:23:53 +0000 | [diff] [blame] | 824 | /// Support for the ObjFW runtime. |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 825 | class CGObjCObjFW: public CGObjCGNU { |
| 826 | protected: |
| 827 | /// The GCC ABI message lookup function. Returns an IMP pointing to the |
| 828 | /// method implementation for this message. |
| 829 | LazyRuntimeFunction MsgLookupFn; |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 830 | /// stret lookup function. While this does not seem to make sense at the |
| 831 | /// first look, this is required to call the correct forwarding function. |
| 832 | LazyRuntimeFunction MsgLookupFnSRet; |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 833 | /// The GCC ABI superclass message lookup function. Takes a pointer to a |
| 834 | /// structure describing the receiver and the class, and a selector as |
| 835 | /// arguments. Returns the IMP for the corresponding method. |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 836 | LazyRuntimeFunction MsgLookupSuperFn, MsgLookupSuperFnSRet; |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 837 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 838 | llvm::Value *LookupIMP(CodeGenFunction &CGF, llvm::Value *&Receiver, |
| 839 | llvm::Value *cmd, llvm::MDNode *node, |
| 840 | MessageSendInfo &MSI) override { |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 841 | CGBuilderTy &Builder = CGF.Builder; |
| 842 | llvm::Value *args[] = { |
| 843 | EnforceType(Builder, Receiver, IdTy), |
| 844 | EnforceType(Builder, cmd, SelectorTy) }; |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 845 | |
| 846 | llvm::CallSite imp; |
| 847 | if (CGM.ReturnTypeUsesSRet(MSI.CallInfo)) |
| 848 | imp = CGF.EmitRuntimeCallOrInvoke(MsgLookupFnSRet, args); |
| 849 | else |
| 850 | imp = CGF.EmitRuntimeCallOrInvoke(MsgLookupFn, args); |
| 851 | |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 852 | imp->setMetadata(msgSendMDKind, node); |
| 853 | return imp.getInstruction(); |
| 854 | } |
| 855 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 856 | llvm::Value *LookupIMPSuper(CodeGenFunction &CGF, Address ObjCSuper, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 857 | llvm::Value *cmd, MessageSendInfo &MSI) override { |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 858 | CGBuilderTy &Builder = CGF.Builder; |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 859 | llvm::Value *lookupArgs[] = {EnforceType(Builder, ObjCSuper.getPointer(), |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 860 | PtrToObjCSuperTy), cmd}; |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 861 | |
| 862 | if (CGM.ReturnTypeUsesSRet(MSI.CallInfo)) |
| 863 | return CGF.EmitNounwindRuntimeCall(MsgLookupSuperFnSRet, lookupArgs); |
| 864 | else |
| 865 | return CGF.EmitNounwindRuntimeCall(MsgLookupSuperFn, lookupArgs); |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 866 | } |
| 867 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 868 | llvm::Value *GetClassNamed(CodeGenFunction &CGF, |
| 869 | const std::string &Name, bool isWeak) override { |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 870 | if (isWeak) |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 871 | return CGObjCGNU::GetClassNamed(CGF, Name, isWeak); |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 872 | |
| 873 | EmitClassRef(Name); |
| 874 | |
| 875 | std::string SymbolName = "_OBJC_CLASS_" + Name; |
| 876 | |
| 877 | llvm::GlobalVariable *ClassSymbol = TheModule.getGlobalVariable(SymbolName); |
| 878 | |
| 879 | if (!ClassSymbol) |
| 880 | ClassSymbol = new llvm::GlobalVariable(TheModule, LongTy, false, |
| 881 | llvm::GlobalValue::ExternalLinkage, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 882 | nullptr, SymbolName); |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 883 | |
| 884 | return ClassSymbol; |
| 885 | } |
| 886 | |
| 887 | public: |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 888 | CGObjCObjFW(CodeGenModule &Mod): CGObjCGNU(Mod, 9, 3) { |
| 889 | // IMP objc_msg_lookup(id, SEL); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 890 | MsgLookupFn.init(&CGM, "objc_msg_lookup", IMPTy, IdTy, SelectorTy, nullptr); |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 891 | MsgLookupFnSRet.init(&CGM, "objc_msg_lookup_stret", IMPTy, IdTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 892 | SelectorTy, nullptr); |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 893 | // IMP objc_msg_lookup_super(struct objc_super*, SEL); |
| 894 | MsgLookupSuperFn.init(&CGM, "objc_msg_lookup_super", IMPTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 895 | PtrToObjCSuperTy, SelectorTy, nullptr); |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 896 | MsgLookupSuperFnSRet.init(&CGM, "objc_msg_lookup_super_stret", IMPTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 897 | PtrToObjCSuperTy, SelectorTy, nullptr); |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 898 | } |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 899 | }; |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 900 | } // end anonymous namespace |
| 901 | |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 902 | /// Emits a reference to a dummy variable which is emitted with each class. |
| 903 | /// This ensures that a linker error will be generated when trying to link |
| 904 | /// together modules where a referenced class is not defined. |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 905 | void CGObjCGNU::EmitClassRef(const std::string &className) { |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 906 | std::string symbolRef = "__objc_class_ref_" + className; |
| 907 | // Don't emit two copies of the same symbol |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 908 | if (TheModule.getGlobalVariable(symbolRef)) |
| 909 | return; |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 910 | std::string symbolName = "__objc_class_name_" + className; |
| 911 | llvm::GlobalVariable *ClassSymbol = TheModule.getGlobalVariable(symbolName); |
| 912 | if (!ClassSymbol) { |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 913 | ClassSymbol = new llvm::GlobalVariable(TheModule, LongTy, false, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 914 | llvm::GlobalValue::ExternalLinkage, |
| 915 | nullptr, symbolName); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 916 | } |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 917 | new llvm::GlobalVariable(TheModule, ClassSymbol->getType(), true, |
Chris Lattner | f35271b | 2009-08-05 05:25:18 +0000 | [diff] [blame] | 918 | llvm::GlobalValue::WeakAnyLinkage, ClassSymbol, symbolRef); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 919 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 920 | |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 921 | static std::string SymbolNameForMethod( StringRef ClassName, |
| 922 | StringRef CategoryName, const Selector MethodName, |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 923 | bool isClassMethod) { |
| 924 | std::string MethodNameColonStripped = MethodName.getAsString(); |
David Chisnall | d346736 | 2010-01-14 14:08:19 +0000 | [diff] [blame] | 925 | std::replace(MethodNameColonStripped.begin(), MethodNameColonStripped.end(), |
| 926 | ':', '_'); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 927 | return (Twine(isClassMethod ? "_c_" : "_i_") + ClassName + "_" + |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 928 | CategoryName + "_" + MethodNameColonStripped).str(); |
David Chisnall | 87935a8 | 2010-05-08 20:58:05 +0000 | [diff] [blame] | 929 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 930 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 931 | CGObjCGNU::CGObjCGNU(CodeGenModule &cgm, unsigned runtimeABIVersion, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 932 | unsigned protocolClassVersion) |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 933 | : CGObjCRuntime(cgm), TheModule(CGM.getModule()), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 934 | VMContext(cgm.getLLVMContext()), ClassPtrAlias(nullptr), |
| 935 | MetaClassPtrAlias(nullptr), RuntimeVersion(runtimeABIVersion), |
| 936 | ProtocolVersion(protocolClassVersion) { |
David Chisnall | c6cd5fd | 2010-04-28 19:33:36 +0000 | [diff] [blame] | 937 | |
| 938 | msgSendMDKind = VMContext.getMDKindID("GNUObjCMessageSend"); |
| 939 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 940 | CodeGenTypes &Types = CGM.getTypes(); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 941 | IntTy = cast<llvm::IntegerType>( |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 942 | Types.ConvertType(CGM.getContext().IntTy)); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 943 | LongTy = cast<llvm::IntegerType>( |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 944 | Types.ConvertType(CGM.getContext().LongTy)); |
David Chisnall | 8fac25d | 2010-12-26 22:13:16 +0000 | [diff] [blame] | 945 | SizeTy = cast<llvm::IntegerType>( |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 946 | Types.ConvertType(CGM.getContext().getSizeType())); |
David Chisnall | 8fac25d | 2010-12-26 22:13:16 +0000 | [diff] [blame] | 947 | PtrDiffTy = cast<llvm::IntegerType>( |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 948 | Types.ConvertType(CGM.getContext().getPointerDiffType())); |
David Chisnall | 8fac25d | 2010-12-26 22:13:16 +0000 | [diff] [blame] | 949 | BoolTy = CGM.getTypes().ConvertType(CGM.getContext().BoolTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 950 | |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 951 | Int8Ty = llvm::Type::getInt8Ty(VMContext); |
| 952 | // C string type. Used in lots of places. |
| 953 | PtrToInt8Ty = llvm::PointerType::getUnqual(Int8Ty); |
| 954 | |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 955 | Zeros[0] = llvm::ConstantInt::get(LongTy, 0); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 956 | Zeros[1] = Zeros[0]; |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 957 | NULLPtr = llvm::ConstantPointerNull::get(PtrToInt8Ty); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 958 | // Get the selector Type. |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 959 | QualType selTy = CGM.getContext().getObjCSelType(); |
| 960 | if (QualType() == selTy) { |
| 961 | SelectorTy = PtrToInt8Ty; |
| 962 | } else { |
| 963 | SelectorTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(selTy)); |
| 964 | } |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 965 | |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 966 | PtrToIntTy = llvm::PointerType::getUnqual(IntTy); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 967 | PtrTy = PtrToInt8Ty; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 968 | |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 969 | Int32Ty = llvm::Type::getInt32Ty(VMContext); |
| 970 | Int64Ty = llvm::Type::getInt64Ty(VMContext); |
| 971 | |
David Chisnall | 49de528 | 2011-10-08 08:54:36 +0000 | [diff] [blame] | 972 | IntPtrTy = |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 973 | CGM.getDataLayout().getPointerSizeInBits() == 32 ? Int32Ty : Int64Ty; |
David Chisnall | 49de528 | 2011-10-08 08:54:36 +0000 | [diff] [blame] | 974 | |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 975 | // Object type |
David Chisnall | 7bcf6c3 | 2011-04-29 14:10:35 +0000 | [diff] [blame] | 976 | QualType UnqualIdTy = CGM.getContext().getObjCIdType(); |
| 977 | ASTIdTy = CanQualType(); |
| 978 | if (UnqualIdTy != QualType()) { |
| 979 | ASTIdTy = CGM.getContext().getCanonicalType(UnqualIdTy); |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 980 | IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy)); |
David Chisnall | 7bcf6c3 | 2011-04-29 14:10:35 +0000 | [diff] [blame] | 981 | } else { |
| 982 | IdTy = PtrToInt8Ty; |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 983 | } |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 984 | PtrToIdTy = llvm::PointerType::getUnqual(IdTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 985 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 986 | ObjCSuperTy = llvm::StructType::get(IdTy, IdTy, nullptr); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 987 | PtrToObjCSuperTy = llvm::PointerType::getUnqual(ObjCSuperTy); |
| 988 | |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 989 | llvm::Type *VoidTy = llvm::Type::getVoidTy(VMContext); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 990 | |
| 991 | // void objc_exception_throw(id); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 992 | ExceptionThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy, nullptr); |
| 993 | ExceptionReThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 994 | // int objc_sync_enter(id); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 995 | SyncEnterFn.init(&CGM, "objc_sync_enter", IntTy, IdTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 996 | // int objc_sync_exit(id); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 997 | SyncExitFn.init(&CGM, "objc_sync_exit", IntTy, IdTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 998 | |
| 999 | // void objc_enumerationMutation (id) |
| 1000 | EnumerationMutationFn.init(&CGM, "objc_enumerationMutation", VoidTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1001 | IdTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1002 | |
| 1003 | // id objc_getProperty(id, SEL, ptrdiff_t, BOOL) |
| 1004 | GetPropertyFn.init(&CGM, "objc_getProperty", IdTy, IdTy, SelectorTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1005 | PtrDiffTy, BoolTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1006 | // void objc_setProperty(id, SEL, ptrdiff_t, id, BOOL, BOOL) |
| 1007 | SetPropertyFn.init(&CGM, "objc_setProperty", VoidTy, IdTy, SelectorTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1008 | PtrDiffTy, IdTy, BoolTy, BoolTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1009 | // void objc_setPropertyStruct(void*, void*, ptrdiff_t, BOOL, BOOL) |
| 1010 | GetStructPropertyFn.init(&CGM, "objc_getPropertyStruct", VoidTy, PtrTy, PtrTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1011 | PtrDiffTy, BoolTy, BoolTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1012 | // void objc_setPropertyStruct(void*, void*, ptrdiff_t, BOOL, BOOL) |
| 1013 | SetStructPropertyFn.init(&CGM, "objc_setPropertyStruct", VoidTy, PtrTy, PtrTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1014 | PtrDiffTy, BoolTy, BoolTy, nullptr); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1015 | |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1016 | // IMP type |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 1017 | llvm::Type *IMPArgs[] = { IdTy, SelectorTy }; |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1018 | IMPTy = llvm::PointerType::getUnqual(llvm::FunctionType::get(IdTy, IMPArgs, |
| 1019 | true)); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1020 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1021 | const LangOptions &Opts = CGM.getLangOpts(); |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1022 | if ((Opts.getGC() != LangOptions::NonGC) || Opts.ObjCAutoRefCount) |
David Chisnall | f074885 | 2011-07-07 11:22:31 +0000 | [diff] [blame] | 1023 | RuntimeVersion = 10; |
| 1024 | |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 1025 | // Don't bother initialising the GC stuff unless we're compiling in GC mode |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1026 | if (Opts.getGC() != LangOptions::NonGC) { |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 1027 | // This is a bit of an hack. We should sort this out by having a proper |
| 1028 | // CGObjCGNUstep subclass for GC, but we may want to really support the old |
| 1029 | // ABI and GC added in ObjectiveC2.framework, so we fudge it a bit for now |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1030 | // Get selectors needed in GC mode |
| 1031 | RetainSel = GetNullarySelector("retain", CGM.getContext()); |
| 1032 | ReleaseSel = GetNullarySelector("release", CGM.getContext()); |
| 1033 | AutoreleaseSel = GetNullarySelector("autorelease", CGM.getContext()); |
| 1034 | |
| 1035 | // Get functions needed in GC mode |
| 1036 | |
| 1037 | // id objc_assign_ivar(id, id, ptrdiff_t); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1038 | IvarAssignFn.init(&CGM, "objc_assign_ivar", IdTy, IdTy, IdTy, PtrDiffTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1039 | nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1040 | // id objc_assign_strongCast (id, id*) |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1041 | StrongCastAssignFn.init(&CGM, "objc_assign_strongCast", IdTy, IdTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1042 | PtrToIdTy, nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1043 | // id objc_assign_global(id, id*); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1044 | GlobalAssignFn.init(&CGM, "objc_assign_global", IdTy, IdTy, PtrToIdTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1045 | nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1046 | // id objc_assign_weak(id, id*); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1047 | WeakAssignFn.init(&CGM, "objc_assign_weak", IdTy, IdTy, PtrToIdTy, nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1048 | // id objc_read_weak(id*); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1049 | WeakReadFn.init(&CGM, "objc_read_weak", IdTy, PtrToIdTy, nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1050 | // void *objc_memmove_collectable(void*, void *, size_t); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1051 | MemMoveFn.init(&CGM, "objc_memmove_collectable", PtrTy, PtrTy, PtrTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1052 | SizeTy, nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1053 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1054 | } |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 1055 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1056 | llvm::Value *CGObjCGNU::GetClassNamed(CodeGenFunction &CGF, |
David Chisnall | d3fc729 | 2011-06-30 10:14:37 +0000 | [diff] [blame] | 1057 | const std::string &Name, |
| 1058 | bool isWeak) { |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1059 | llvm::Constant *ClassName = MakeConstantString(Name); |
David Chisnall | 41d63ed | 2010-01-08 00:14:31 +0000 | [diff] [blame] | 1060 | // With the incompatible ABI, this will need to be replaced with a direct |
| 1061 | // reference to the class symbol. For the compatible nonfragile ABI we are |
| 1062 | // still performing this lookup at run time but emitting the symbol for the |
| 1063 | // class externally so that we can make the switch later. |
David Chisnall | c7aed3b | 2011-06-29 13:16:41 +0000 | [diff] [blame] | 1064 | // |
| 1065 | // Libobjc2 contains an LLVM pass that replaces calls to objc_lookup_class |
| 1066 | // with memoized versions or with static references if it's safe to do so. |
David Chisnall | d3fc729 | 2011-06-30 10:14:37 +0000 | [diff] [blame] | 1067 | if (!isWeak) |
| 1068 | EmitClassRef(Name); |
Daniel Dunbar | ddb2a3d | 2008-08-16 00:25:02 +0000 | [diff] [blame] | 1069 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1070 | llvm::Constant *ClassLookupFn = |
Jay Foad | da549e8 | 2011-07-29 13:56:53 +0000 | [diff] [blame] | 1071 | CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, PtrToInt8Ty, true), |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 1072 | "objc_lookup_class"); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1073 | return CGF.EmitNounwindRuntimeCall(ClassLookupFn, ClassName); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1074 | } |
| 1075 | |
David Chisnall | c7aed3b | 2011-06-29 13:16:41 +0000 | [diff] [blame] | 1076 | // This has to perform the lookup every time, since posing and related |
| 1077 | // techniques can modify the name -> class mapping. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1078 | llvm::Value *CGObjCGNU::GetClass(CodeGenFunction &CGF, |
David Chisnall | c7aed3b | 2011-06-29 13:16:41 +0000 | [diff] [blame] | 1079 | const ObjCInterfaceDecl *OID) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1080 | return GetClassNamed(CGF, OID->getNameAsString(), OID->isWeakImported()); |
David Chisnall | c7aed3b | 2011-06-29 13:16:41 +0000 | [diff] [blame] | 1081 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1082 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1083 | llvm::Value *CGObjCGNU::EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) { |
| 1084 | return GetClassNamed(CGF, "NSAutoreleasePool", false); |
David Chisnall | c7aed3b | 2011-06-29 13:16:41 +0000 | [diff] [blame] | 1085 | } |
| 1086 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1087 | llvm::Value *CGObjCGNU::GetSelector(CodeGenFunction &CGF, Selector Sel, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1088 | const std::string &TypeEncoding) { |
Craig Topper | ad5b69d | 2013-07-14 16:47:36 +0000 | [diff] [blame] | 1089 | SmallVectorImpl<TypedSelector> &Types = SelectorTable[Sel]; |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1090 | llvm::GlobalAlias *SelValue = nullptr; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1091 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1092 | for (SmallVectorImpl<TypedSelector>::iterator i = Types.begin(), |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1093 | e = Types.end() ; i!=e ; i++) { |
| 1094 | if (i->first == TypeEncoding) { |
| 1095 | SelValue = i->second; |
| 1096 | break; |
| 1097 | } |
| 1098 | } |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1099 | if (!SelValue) { |
| 1100 | SelValue = llvm::GlobalAlias::create( |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1101 | SelectorTy->getElementType(), 0, llvm::GlobalValue::PrivateLinkage, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1102 | ".objc_selector_" + Sel.getAsString(), &TheModule); |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 1103 | Types.emplace_back(TypeEncoding, SelValue); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1104 | } |
| 1105 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1106 | return SelValue; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1107 | } |
| 1108 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1109 | Address CGObjCGNU::GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) { |
| 1110 | llvm::Value *SelValue = GetSelector(CGF, Sel); |
| 1111 | |
| 1112 | // Store it to a temporary. Does this satisfy the semantics of |
| 1113 | // GetAddrOfSelector? Hopefully. |
| 1114 | Address tmp = CGF.CreateTempAlloca(SelValue->getType(), |
| 1115 | CGF.getPointerAlign()); |
| 1116 | CGF.Builder.CreateStore(SelValue, tmp); |
| 1117 | return tmp; |
| 1118 | } |
| 1119 | |
| 1120 | llvm::Value *CGObjCGNU::GetSelector(CodeGenFunction &CGF, Selector Sel) { |
| 1121 | return GetSelector(CGF, Sel, std::string()); |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 1122 | } |
| 1123 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1124 | llvm::Value *CGObjCGNU::GetSelector(CodeGenFunction &CGF, |
| 1125 | const ObjCMethodDecl *Method) { |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 1126 | std::string SelTypes; |
| 1127 | CGM.getContext().getObjCEncodingForMethodDecl(Method, SelTypes); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1128 | return GetSelector(CGF, Method->getSelector(), SelTypes); |
Chris Lattner | 8e67b63 | 2008-06-26 04:37:12 +0000 | [diff] [blame] | 1129 | } |
| 1130 | |
Fariborz Jahanian | cf5abc7 | 2011-06-23 19:00:08 +0000 | [diff] [blame] | 1131 | llvm::Constant *CGObjCGNU::GetEHType(QualType T) { |
John McCall | 2b07dd3 | 2012-11-14 09:08:34 +0000 | [diff] [blame] | 1132 | if (T->isObjCIdType() || T->isObjCQualifiedIdType()) { |
| 1133 | // With the old ABI, there was only one kind of catchall, which broke |
| 1134 | // foreign exceptions. With the new ABI, we use __objc_id_typeinfo as |
| 1135 | // a pointer indicating object catchalls, and NULL to indicate real |
| 1136 | // catchalls |
| 1137 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { |
| 1138 | return MakeConstantString("@id"); |
| 1139 | } else { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1140 | return nullptr; |
John McCall | 2b07dd3 | 2012-11-14 09:08:34 +0000 | [diff] [blame] | 1141 | } |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 1142 | } |
John McCall | 2b07dd3 | 2012-11-14 09:08:34 +0000 | [diff] [blame] | 1143 | |
| 1144 | // All other types should be Objective-C interface pointer types. |
| 1145 | const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>(); |
| 1146 | assert(OPT && "Invalid @catch type."); |
| 1147 | const ObjCInterfaceDecl *IDecl = OPT->getObjectType()->getInterface(); |
| 1148 | assert(IDecl && "Invalid @catch type."); |
| 1149 | return MakeConstantString(IDecl->getIdentifier()->getName()); |
| 1150 | } |
| 1151 | |
| 1152 | llvm::Constant *CGObjCGNUstep::GetEHType(QualType T) { |
| 1153 | if (!CGM.getLangOpts().CPlusPlus) |
| 1154 | return CGObjCGNU::GetEHType(T); |
| 1155 | |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1156 | // For Objective-C++, we want to provide the ability to catch both C++ and |
| 1157 | // Objective-C objects in the same function. |
| 1158 | |
| 1159 | // There's a particular fixed type info for 'id'. |
| 1160 | if (T->isObjCIdType() || |
| 1161 | T->isObjCQualifiedIdType()) { |
| 1162 | llvm::Constant *IDEHType = |
| 1163 | CGM.getModule().getGlobalVariable("__objc_id_type_info"); |
| 1164 | if (!IDEHType) |
| 1165 | IDEHType = |
| 1166 | new llvm::GlobalVariable(CGM.getModule(), PtrToInt8Ty, |
| 1167 | false, |
| 1168 | llvm::GlobalValue::ExternalLinkage, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1169 | nullptr, "__objc_id_type_info"); |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1170 | return llvm::ConstantExpr::getBitCast(IDEHType, PtrToInt8Ty); |
| 1171 | } |
| 1172 | |
| 1173 | const ObjCObjectPointerType *PT = |
| 1174 | T->getAs<ObjCObjectPointerType>(); |
| 1175 | assert(PT && "Invalid @catch type."); |
| 1176 | const ObjCInterfaceType *IT = PT->getInterfaceType(); |
| 1177 | assert(IT && "Invalid @catch type."); |
| 1178 | std::string className = IT->getDecl()->getIdentifier()->getName(); |
| 1179 | |
| 1180 | std::string typeinfoName = "__objc_eh_typeinfo_" + className; |
| 1181 | |
| 1182 | // Return the existing typeinfo if it exists |
| 1183 | llvm::Constant *typeinfo = TheModule.getGlobalVariable(typeinfoName); |
David Chisnall | acd76fe | 2012-03-20 16:25:52 +0000 | [diff] [blame] | 1184 | if (typeinfo) |
| 1185 | return llvm::ConstantExpr::getBitCast(typeinfo, PtrToInt8Ty); |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1186 | |
| 1187 | // Otherwise create it. |
| 1188 | |
| 1189 | // vtable for gnustep::libobjc::__objc_class_type_info |
| 1190 | // It's quite ugly hard-coding this. Ideally we'd generate it using the host |
| 1191 | // platform's name mangling. |
| 1192 | const char *vtableName = "_ZTVN7gnustep7libobjc22__objc_class_type_infoE"; |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1193 | auto *Vtable = TheModule.getGlobalVariable(vtableName); |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1194 | if (!Vtable) { |
| 1195 | Vtable = new llvm::GlobalVariable(TheModule, PtrToInt8Ty, true, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1196 | llvm::GlobalValue::ExternalLinkage, |
| 1197 | nullptr, vtableName); |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1198 | } |
| 1199 | llvm::Constant *Two = llvm::ConstantInt::get(IntTy, 2); |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1200 | auto *BVtable = llvm::ConstantExpr::getBitCast( |
| 1201 | llvm::ConstantExpr::getGetElementPtr(Vtable->getValueType(), Vtable, Two), |
| 1202 | PtrToInt8Ty); |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1203 | |
| 1204 | llvm::Constant *typeName = |
| 1205 | ExportUniqueString(className, "__objc_eh_typename_"); |
| 1206 | |
| 1207 | std::vector<llvm::Constant*> fields; |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1208 | fields.push_back(BVtable); |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1209 | fields.push_back(typeName); |
| 1210 | llvm::Constant *TI = |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1211 | MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, nullptr), |
| 1212 | fields, CGM.getPointerAlign(), |
| 1213 | "__objc_eh_typeinfo_" + className, |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 1214 | llvm::GlobalValue::LinkOnceODRLinkage); |
| 1215 | return llvm::ConstantExpr::getBitCast(TI, PtrToInt8Ty); |
John McCall | 5a18039 | 2010-07-24 00:37:23 +0000 | [diff] [blame] | 1216 | } |
| 1217 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1218 | /// Generate an NSConstantString object. |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1219 | ConstantAddress CGObjCGNU::GenerateConstantString(const StringLiteral *SL) { |
David Chisnall | 48272a0 | 2010-01-27 12:49:23 +0000 | [diff] [blame] | 1220 | |
Benjamin Kramer | 2f4eaef | 2010-08-17 12:54:38 +0000 | [diff] [blame] | 1221 | std::string Str = SL->getString().str(); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1222 | CharUnits Align = CGM.getPointerAlign(); |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 1223 | |
David Chisnall | 48272a0 | 2010-01-27 12:49:23 +0000 | [diff] [blame] | 1224 | // Look for an existing one |
| 1225 | llvm::StringMap<llvm::Constant*>::iterator old = ObjCStrings.find(Str); |
| 1226 | if (old != ObjCStrings.end()) |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1227 | return ConstantAddress(old->getValue(), Align); |
David Chisnall | 48272a0 | 2010-01-27 12:49:23 +0000 | [diff] [blame] | 1228 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1229 | StringRef StringClass = CGM.getLangOpts().ObjCConstantStringClass; |
David Chisnall | 13df6f6 | 2012-01-04 12:02:13 +0000 | [diff] [blame] | 1230 | |
| 1231 | if (StringClass.empty()) StringClass = "NXConstantString"; |
| 1232 | |
| 1233 | std::string Sym = "_OBJC_CLASS_"; |
| 1234 | Sym += StringClass; |
| 1235 | |
| 1236 | llvm::Constant *isa = TheModule.getNamedGlobal(Sym); |
| 1237 | |
| 1238 | if (!isa) |
| 1239 | isa = new llvm::GlobalVariable(TheModule, IdTy, /* isConstant */false, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1240 | llvm::GlobalValue::ExternalWeakLinkage, nullptr, Sym); |
David Chisnall | 13df6f6 | 2012-01-04 12:02:13 +0000 | [diff] [blame] | 1241 | else if (isa->getType() != PtrToIdTy) |
| 1242 | isa = llvm::ConstantExpr::getBitCast(isa, PtrToIdTy); |
| 1243 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1244 | std::vector<llvm::Constant*> Ivars; |
David Chisnall | 13df6f6 | 2012-01-04 12:02:13 +0000 | [diff] [blame] | 1245 | Ivars.push_back(isa); |
Chris Lattner | 13fd7e5 | 2008-06-21 21:44:18 +0000 | [diff] [blame] | 1246 | Ivars.push_back(MakeConstantString(Str)); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1247 | Ivars.push_back(llvm::ConstantInt::get(IntTy, Str.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1248 | llvm::Constant *ObjCStr = MakeGlobal( |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1249 | llvm::StructType::get(PtrToIdTy, PtrToInt8Ty, IntTy, nullptr), |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1250 | Ivars, Align, ".objc_str"); |
David Chisnall | 48272a0 | 2010-01-27 12:49:23 +0000 | [diff] [blame] | 1251 | ObjCStr = llvm::ConstantExpr::getBitCast(ObjCStr, PtrToInt8Ty); |
| 1252 | ObjCStrings[Str] = ObjCStr; |
| 1253 | ConstantStrings.push_back(ObjCStr); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1254 | return ConstantAddress(ObjCStr, Align); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | ///Generates a message send where the super is the receiver. This is a message |
| 1258 | ///send to self with special delivery semantics indicating which class's method |
| 1259 | ///should be called. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1260 | RValue |
| 1261 | CGObjCGNU::GenerateMessageSendSuper(CodeGenFunction &CGF, |
John McCall | ef072fd | 2010-05-22 01:48:05 +0000 | [diff] [blame] | 1262 | ReturnValueSlot Return, |
Daniel Dunbar | 7f8ea5c | 2008-08-30 05:35:15 +0000 | [diff] [blame] | 1263 | QualType ResultType, |
| 1264 | Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 1265 | const ObjCInterfaceDecl *Class, |
Fariborz Jahanian | 7ce7792 | 2009-02-28 20:07:56 +0000 | [diff] [blame] | 1266 | bool isCategoryImpl, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 1267 | llvm::Value *Receiver, |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1268 | bool IsClassMessage, |
Daniel Dunbar | d6c93d7 | 2009-09-17 04:01:22 +0000 | [diff] [blame] | 1269 | const CallArgList &CallArgs, |
| 1270 | const ObjCMethodDecl *Method) { |
David Chisnall | 0bbe0cf | 2011-05-28 14:09:01 +0000 | [diff] [blame] | 1271 | CGBuilderTy &Builder = CGF.Builder; |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1272 | if (CGM.getLangOpts().getGC() == LangOptions::GCOnly) { |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1273 | if (Sel == RetainSel || Sel == AutoreleaseSel) { |
David Chisnall | 0bbe0cf | 2011-05-28 14:09:01 +0000 | [diff] [blame] | 1274 | return RValue::get(EnforceType(Builder, Receiver, |
| 1275 | CGM.getTypes().ConvertType(ResultType))); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1276 | } |
| 1277 | if (Sel == ReleaseSel) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1278 | return RValue::get(nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1279 | } |
| 1280 | } |
David Chisnall | db83194 | 2010-05-01 12:37:16 +0000 | [diff] [blame] | 1281 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1282 | llvm::Value *cmd = GetSelector(CGF, Sel); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 1283 | CallArgList ActualArgs; |
| 1284 | |
Eli Friedman | 04c9a49 | 2011-05-02 17:57:46 +0000 | [diff] [blame] | 1285 | ActualArgs.add(RValue::get(EnforceType(Builder, Receiver, IdTy)), ASTIdTy); |
| 1286 | ActualArgs.add(RValue::get(cmd), CGF.getContext().getObjCSelType()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1287 | ActualArgs.addFrom(CallArgs); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 1288 | |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 1289 | MessageSendInfo MSI = getMessageSendInfo(Method, ResultType, ActualArgs); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 1290 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1291 | llvm::Value *ReceiverClass = nullptr; |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1292 | if (isCategoryImpl) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1293 | llvm::Constant *classLookupFunction = nullptr; |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1294 | if (IsClassMessage) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1295 | classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
Jay Foad | da549e8 | 2011-07-29 13:56:53 +0000 | [diff] [blame] | 1296 | IdTy, PtrTy, true), "objc_get_meta_class"); |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1297 | } else { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1298 | classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get( |
Jay Foad | da549e8 | 2011-07-29 13:56:53 +0000 | [diff] [blame] | 1299 | IdTy, PtrTy, true), "objc_get_class"); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 1300 | } |
David Chisnall | db83194 | 2010-05-01 12:37:16 +0000 | [diff] [blame] | 1301 | ReceiverClass = Builder.CreateCall(classLookupFunction, |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1302 | MakeConstantString(Class->getNameAsString())); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 1303 | } else { |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1304 | // Set up global aliases for the metaclass or class pointer if they do not |
| 1305 | // already exist. These will are forward-references which will be set to |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 1306 | // pointers to the class and metaclass structure created for the runtime |
| 1307 | // load function. To send a message to super, we look up the value of the |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1308 | // super_class pointer from either the class or metaclass structure. |
| 1309 | if (IsClassMessage) { |
| 1310 | if (!MetaClassPtrAlias) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1311 | MetaClassPtrAlias = llvm::GlobalAlias::create( |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1312 | IdTy->getElementType(), 0, llvm::GlobalValue::InternalLinkage, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1313 | ".objc_metaclass_ref" + Class->getNameAsString(), &TheModule); |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1314 | } |
| 1315 | ReceiverClass = MetaClassPtrAlias; |
| 1316 | } else { |
| 1317 | if (!ClassPtrAlias) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1318 | ClassPtrAlias = llvm::GlobalAlias::create( |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1319 | IdTy->getElementType(), 0, llvm::GlobalValue::InternalLinkage, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1320 | ".objc_class_ref" + Class->getNameAsString(), &TheModule); |
Chris Lattner | 48e6e7e | 2009-05-08 15:39:58 +0000 | [diff] [blame] | 1321 | } |
| 1322 | ReceiverClass = ClassPtrAlias; |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 1323 | } |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 1324 | } |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 1325 | // Cast the pointer to a simplified version of the class structure |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1326 | llvm::Type *CastTy = llvm::StructType::get(IdTy, IdTy, nullptr); |
David Chisnall | db83194 | 2010-05-01 12:37:16 +0000 | [diff] [blame] | 1327 | ReceiverClass = Builder.CreateBitCast(ReceiverClass, |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1328 | llvm::PointerType::getUnqual(CastTy)); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 1329 | // Get the superclass pointer |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1330 | ReceiverClass = Builder.CreateStructGEP(CastTy, ReceiverClass, 1); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 1331 | // Load the superclass pointer |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1332 | ReceiverClass = |
| 1333 | Builder.CreateAlignedLoad(ReceiverClass, CGF.getPointerAlign()); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1334 | // Construct the structure used to look up the IMP |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1335 | llvm::StructType *ObjCSuperTy = llvm::StructType::get( |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1336 | Receiver->getType(), IdTy, nullptr); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1337 | |
| 1338 | // FIXME: Is this really supposed to be a dynamic alloca? |
| 1339 | Address ObjCSuper = Address(Builder.CreateAlloca(ObjCSuperTy), |
| 1340 | CGF.getPointerAlign()); |
Fariborz Jahanian | b3716ef | 2009-02-04 20:31:19 +0000 | [diff] [blame] | 1341 | |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1342 | Builder.CreateStore(Receiver, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1343 | Builder.CreateStructGEP(ObjCSuper, 0, CharUnits::Zero())); |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 1344 | Builder.CreateStore(ReceiverClass, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1345 | Builder.CreateStructGEP(ObjCSuper, 1, CGF.getPointerSize())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1346 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1347 | ObjCSuper = EnforceType(Builder, ObjCSuper, PtrToObjCSuperTy); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1348 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1349 | // Get the IMP |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 1350 | llvm::Value *imp = LookupIMPSuper(CGF, ObjCSuper, cmd, MSI); |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 1351 | imp = EnforceType(Builder, imp, MSI.MessengerType); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1352 | |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame] | 1353 | llvm::Metadata *impMD[] = { |
David Chisnall | dd5c98f | 2010-05-01 11:15:56 +0000 | [diff] [blame] | 1354 | llvm::MDString::get(VMContext, Sel.getAsString()), |
| 1355 | llvm::MDString::get(VMContext, Class->getSuperClass()->getNameAsString()), |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame] | 1356 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( |
| 1357 | llvm::Type::getInt1Ty(VMContext), IsClassMessage))}; |
Jay Foad | 6f14165 | 2011-04-21 19:59:12 +0000 | [diff] [blame] | 1358 | llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD); |
David Chisnall | dd5c98f | 2010-05-01 11:15:56 +0000 | [diff] [blame] | 1359 | |
David Chisnall | 4b02afc | 2010-05-02 13:41:58 +0000 | [diff] [blame] | 1360 | llvm::Instruction *call; |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1361 | RValue msgRet = CGF.EmitCall(MSI.CallInfo, imp, Return, ActualArgs, |
| 1362 | CGCalleeInfo(), &call); |
David Chisnall | 4b02afc | 2010-05-02 13:41:58 +0000 | [diff] [blame] | 1363 | call->setMetadata(msgSendMDKind, node); |
| 1364 | return msgRet; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1365 | } |
| 1366 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1367 | /// Generate code for a message send expression. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1368 | RValue |
| 1369 | CGObjCGNU::GenerateMessageSend(CodeGenFunction &CGF, |
John McCall | ef072fd | 2010-05-22 01:48:05 +0000 | [diff] [blame] | 1370 | ReturnValueSlot Return, |
Daniel Dunbar | 7f8ea5c | 2008-08-30 05:35:15 +0000 | [diff] [blame] | 1371 | QualType ResultType, |
| 1372 | Selector Sel, |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 1373 | llvm::Value *Receiver, |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 1374 | const CallArgList &CallArgs, |
David Chisnall | c6cd5fd | 2010-04-28 19:33:36 +0000 | [diff] [blame] | 1375 | const ObjCInterfaceDecl *Class, |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 1376 | const ObjCMethodDecl *Method) { |
David Chisnall | 0bbe0cf | 2011-05-28 14:09:01 +0000 | [diff] [blame] | 1377 | CGBuilderTy &Builder = CGF.Builder; |
| 1378 | |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1379 | // Strip out message sends to retain / release in GC mode |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1380 | if (CGM.getLangOpts().getGC() == LangOptions::GCOnly) { |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1381 | if (Sel == RetainSel || Sel == AutoreleaseSel) { |
David Chisnall | 0bbe0cf | 2011-05-28 14:09:01 +0000 | [diff] [blame] | 1382 | return RValue::get(EnforceType(Builder, Receiver, |
| 1383 | CGM.getTypes().ConvertType(ResultType))); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1384 | } |
| 1385 | if (Sel == ReleaseSel) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1386 | return RValue::get(nullptr); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 1387 | } |
| 1388 | } |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1389 | |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1390 | // If the return type is something that goes in an integer register, the |
| 1391 | // runtime will handle 0 returns. For other cases, we fill in the 0 value |
| 1392 | // ourselves. |
| 1393 | // |
| 1394 | // The language spec says the result of this kind of message send is |
| 1395 | // undefined, but lots of people seem to have forgotten to read that |
| 1396 | // paragraph and insist on sending messages to nil that have structure |
| 1397 | // returns. With GCC, this generates a random return value (whatever happens |
| 1398 | // to be on the stack / in those registers at the time) on most platforms, |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1399 | // and generates an illegal instruction trap on SPARC. With LLVM it corrupts |
| 1400 | // the stack. |
| 1401 | bool isPointerSizedReturn = (ResultType->isAnyPointerType() || |
| 1402 | ResultType->isIntegralOrEnumerationType() || ResultType->isVoidType()); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1403 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1404 | llvm::BasicBlock *startBB = nullptr; |
| 1405 | llvm::BasicBlock *messageBB = nullptr; |
| 1406 | llvm::BasicBlock *continueBB = nullptr; |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1407 | |
| 1408 | if (!isPointerSizedReturn) { |
| 1409 | startBB = Builder.GetInsertBlock(); |
| 1410 | messageBB = CGF.createBasicBlock("msgSend"); |
David Chisnall | a54da05 | 2010-05-20 13:45:48 +0000 | [diff] [blame] | 1411 | continueBB = CGF.createBasicBlock("continue"); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1412 | |
| 1413 | llvm::Value *isNil = Builder.CreateICmpEQ(Receiver, |
| 1414 | llvm::Constant::getNullValue(Receiver->getType())); |
David Chisnall | a54da05 | 2010-05-20 13:45:48 +0000 | [diff] [blame] | 1415 | Builder.CreateCondBr(isNil, continueBB, messageBB); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1416 | CGF.EmitBlock(messageBB); |
| 1417 | } |
| 1418 | |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 1419 | IdTy = cast<llvm::PointerType>(CGM.getTypes().ConvertType(ASTIdTy)); |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 1420 | llvm::Value *cmd; |
| 1421 | if (Method) |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1422 | cmd = GetSelector(CGF, Method); |
Fariborz Jahanian | df9ccc6 | 2009-05-05 21:36:57 +0000 | [diff] [blame] | 1423 | else |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1424 | cmd = GetSelector(CGF, Sel); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1425 | cmd = EnforceType(Builder, cmd, SelectorTy); |
| 1426 | Receiver = EnforceType(Builder, Receiver, IdTy); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1427 | |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame] | 1428 | llvm::Metadata *impMD[] = { |
| 1429 | llvm::MDString::get(VMContext, Sel.getAsString()), |
| 1430 | llvm::MDString::get(VMContext, Class ? Class->getNameAsString() : ""), |
| 1431 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( |
| 1432 | llvm::Type::getInt1Ty(VMContext), Class != nullptr))}; |
Jay Foad | 6f14165 | 2011-04-21 19:59:12 +0000 | [diff] [blame] | 1433 | llvm::MDNode *node = llvm::MDNode::get(VMContext, impMD); |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1434 | |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1435 | CallArgList ActualArgs; |
Eli Friedman | 04c9a49 | 2011-05-02 17:57:46 +0000 | [diff] [blame] | 1436 | ActualArgs.add(RValue::get(Receiver), ASTIdTy); |
| 1437 | ActualArgs.add(RValue::get(cmd), CGF.getContext().getObjCSelType()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1438 | ActualArgs.addFrom(CallArgs); |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 1439 | |
| 1440 | MessageSendInfo MSI = getMessageSendInfo(Method, ResultType, ActualArgs); |
| 1441 | |
David Chisnall | 89c3004 | 2011-10-24 14:07:03 +0000 | [diff] [blame] | 1442 | // Get the IMP to call |
| 1443 | llvm::Value *imp; |
| 1444 | |
| 1445 | // If we have non-legacy dispatch specified, we try using the objc_msgSend() |
| 1446 | // functions. These are not supported on all platforms (or all runtimes on a |
| 1447 | // given platform), so we |
| 1448 | switch (CGM.getCodeGenOpts().getObjCDispatchMethod()) { |
David Chisnall | 89c3004 | 2011-10-24 14:07:03 +0000 | [diff] [blame] | 1449 | case CodeGenOptions::Legacy: |
Eli Friedman | 11311ea | 2013-07-26 00:53:29 +0000 | [diff] [blame] | 1450 | imp = LookupIMP(CGF, Receiver, cmd, node, MSI); |
David Chisnall | 89c3004 | 2011-10-24 14:07:03 +0000 | [diff] [blame] | 1451 | break; |
| 1452 | case CodeGenOptions::Mixed: |
David Chisnall | 89c3004 | 2011-10-24 14:07:03 +0000 | [diff] [blame] | 1453 | case CodeGenOptions::NonLegacy: |
David Chisnall | 6f3887e | 2011-10-28 17:55:06 +0000 | [diff] [blame] | 1454 | if (CGM.ReturnTypeUsesFPRet(ResultType)) { |
| 1455 | imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true), |
| 1456 | "objc_msgSend_fpret"); |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 1457 | } else if (CGM.ReturnTypeUsesSRet(MSI.CallInfo)) { |
David Chisnall | 89c3004 | 2011-10-24 14:07:03 +0000 | [diff] [blame] | 1458 | // The actual types here don't matter - we're going to bitcast the |
| 1459 | // function anyway |
| 1460 | imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true), |
| 1461 | "objc_msgSend_stret"); |
| 1462 | } else { |
| 1463 | imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true), |
| 1464 | "objc_msgSend"); |
| 1465 | } |
| 1466 | } |
| 1467 | |
David Chisnall | 403bc3f | 2011-12-01 18:40:09 +0000 | [diff] [blame] | 1468 | // Reset the receiver in case the lookup modified it |
| 1469 | ActualArgs[0] = CallArg(RValue::get(Receiver), ASTIdTy, false); |
David Chisnall | 89c3004 | 2011-10-24 14:07:03 +0000 | [diff] [blame] | 1470 | |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 1471 | imp = EnforceType(Builder, imp, MSI.MessengerType); |
David Chisnall | 63e742b | 2010-05-01 12:56:56 +0000 | [diff] [blame] | 1472 | |
David Chisnall | 4b02afc | 2010-05-02 13:41:58 +0000 | [diff] [blame] | 1473 | llvm::Instruction *call; |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1474 | RValue msgRet = CGF.EmitCall(MSI.CallInfo, imp, Return, ActualArgs, |
| 1475 | CGCalleeInfo(), &call); |
David Chisnall | 4b02afc | 2010-05-02 13:41:58 +0000 | [diff] [blame] | 1476 | call->setMetadata(msgSendMDKind, node); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1477 | |
David Chisnall | a54da05 | 2010-05-20 13:45:48 +0000 | [diff] [blame] | 1478 | |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1479 | if (!isPointerSizedReturn) { |
David Chisnall | a54da05 | 2010-05-20 13:45:48 +0000 | [diff] [blame] | 1480 | messageBB = CGF.Builder.GetInsertBlock(); |
| 1481 | CGF.Builder.CreateBr(continueBB); |
| 1482 | CGF.EmitBlock(continueBB); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1483 | if (msgRet.isScalar()) { |
| 1484 | llvm::Value *v = msgRet.getScalarVal(); |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1485 | llvm::PHINode *phi = Builder.CreatePHI(v->getType(), 2); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1486 | phi->addIncoming(v, messageBB); |
| 1487 | phi->addIncoming(llvm::Constant::getNullValue(v->getType()), startBB); |
| 1488 | msgRet = RValue::get(phi); |
| 1489 | } else if (msgRet.isAggregate()) { |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1490 | Address v = msgRet.getAggregateAddress(); |
| 1491 | llvm::PHINode *phi = Builder.CreatePHI(v.getType(), 2); |
| 1492 | llvm::Type *RetTy = v.getElementType(); |
| 1493 | Address NullVal = CGF.CreateTempAlloca(RetTy, v.getAlignment(), "null"); |
| 1494 | CGF.InitTempAlloca(NullVal, llvm::Constant::getNullValue(RetTy)); |
| 1495 | phi->addIncoming(v.getPointer(), messageBB); |
| 1496 | phi->addIncoming(NullVal.getPointer(), startBB); |
| 1497 | msgRet = RValue::getAggregate(Address(phi, v.getAlignment())); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1498 | } else /* isComplex() */ { |
| 1499 | std::pair<llvm::Value*,llvm::Value*> v = msgRet.getComplexVal(); |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1500 | llvm::PHINode *phi = Builder.CreatePHI(v.first->getType(), 2); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1501 | phi->addIncoming(v.first, messageBB); |
| 1502 | phi->addIncoming(llvm::Constant::getNullValue(v.first->getType()), |
| 1503 | startBB); |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1504 | llvm::PHINode *phi2 = Builder.CreatePHI(v.second->getType(), 2); |
David Chisnall | 664b7c7 | 2010-04-27 15:08:48 +0000 | [diff] [blame] | 1505 | phi2->addIncoming(v.second, messageBB); |
| 1506 | phi2->addIncoming(llvm::Constant::getNullValue(v.second->getType()), |
| 1507 | startBB); |
| 1508 | msgRet = RValue::getComplex(phi, phi2); |
| 1509 | } |
| 1510 | } |
| 1511 | return msgRet; |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 1512 | } |
| 1513 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1514 | /// Generates a MethodList. Used in construction of a objc_class and |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1515 | /// objc_category structures. |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 1516 | llvm::Constant *CGObjCGNU:: |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1517 | GenerateMethodList(StringRef ClassName, |
| 1518 | StringRef CategoryName, |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 1519 | ArrayRef<Selector> MethodSels, |
| 1520 | ArrayRef<llvm::Constant *> MethodTypes, |
| 1521 | bool isClassMethodList) { |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 1522 | if (MethodSels.empty()) |
| 1523 | return NULLPtr; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1524 | // Get the method structure type. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1525 | llvm::StructType *ObjCMethodTy = llvm::StructType::get( |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1526 | PtrToInt8Ty, // Really a selector, but the runtime creates it us. |
| 1527 | PtrToInt8Ty, // Method types |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1528 | IMPTy, //Method pointer |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1529 | nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1530 | std::vector<llvm::Constant*> Methods; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1531 | for (unsigned int i = 0, e = MethodTypes.size(); i < e; ++i) { |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1532 | llvm::Constant *Method = |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1533 | TheModule.getFunction(SymbolNameForMethod(ClassName, CategoryName, |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1534 | MethodSels[i], |
| 1535 | isClassMethodList)); |
| 1536 | assert(Method && "Can't generate metadata for method that doesn't exist"); |
| 1537 | llvm::Constant *C = MakeConstantString(MethodSels[i].getAsString()); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 1538 | Method = llvm::ConstantExpr::getBitCast(Method, |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 1539 | IMPTy); |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1540 | Methods.push_back( |
| 1541 | llvm::ConstantStruct::get(ObjCMethodTy, {C, MethodTypes[i], Method})); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1542 | } |
| 1543 | |
| 1544 | // Array of method structures |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1545 | llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodTy, |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 1546 | Methods.size()); |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 1547 | llvm::Constant *MethodArray = llvm::ConstantArray::get(ObjCMethodArrayTy, |
Chris Lattner | fba6763 | 2008-06-26 04:52:29 +0000 | [diff] [blame] | 1548 | Methods); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1549 | |
| 1550 | // Structure containing list pointer, array and array count |
Chris Lattner | c1c2011 | 2011-08-12 17:43:31 +0000 | [diff] [blame] | 1551 | llvm::StructType *ObjCMethodListTy = llvm::StructType::create(VMContext); |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 1552 | llvm::Type *NextPtrTy = llvm::PointerType::getUnqual(ObjCMethodListTy); |
| 1553 | ObjCMethodListTy->setBody( |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1554 | NextPtrTy, |
| 1555 | IntTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1556 | ObjCMethodArrayTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1557 | nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1558 | |
| 1559 | Methods.clear(); |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 1560 | Methods.push_back(llvm::ConstantPointerNull::get( |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1561 | llvm::PointerType::getUnqual(ObjCMethodListTy))); |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 1562 | Methods.push_back(llvm::ConstantInt::get(Int32Ty, MethodTypes.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1563 | Methods.push_back(MethodArray); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1564 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1565 | // Create an instance of the structure |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1566 | return MakeGlobal(ObjCMethodListTy, Methods, CGM.getPointerAlign(), |
| 1567 | ".objc_method_list"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1568 | } |
| 1569 | |
| 1570 | /// Generates an IvarList. Used in construction of a objc_class. |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 1571 | llvm::Constant *CGObjCGNU:: |
| 1572 | GenerateIvarList(ArrayRef<llvm::Constant *> IvarNames, |
| 1573 | ArrayRef<llvm::Constant *> IvarTypes, |
| 1574 | ArrayRef<llvm::Constant *> IvarOffsets) { |
David Chisnall | 1804463 | 2009-11-16 19:05:54 +0000 | [diff] [blame] | 1575 | if (IvarNames.size() == 0) |
| 1576 | return NULLPtr; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1577 | // Get the method structure type. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1578 | llvm::StructType *ObjCIvarTy = llvm::StructType::get( |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1579 | PtrToInt8Ty, |
| 1580 | PtrToInt8Ty, |
| 1581 | IntTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1582 | nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1583 | std::vector<llvm::Constant*> Ivars; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1584 | for (unsigned int i = 0, e = IvarNames.size() ; i < e ; i++) { |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1585 | Ivars.push_back(llvm::ConstantStruct::get( |
| 1586 | ObjCIvarTy, {IvarNames[i], IvarTypes[i], IvarOffsets[i]})); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1587 | } |
| 1588 | |
| 1589 | // Array of method structures |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1590 | llvm::ArrayType *ObjCIvarArrayTy = llvm::ArrayType::get(ObjCIvarTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1591 | IvarNames.size()); |
| 1592 | |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1593 | llvm::Constant *Elements[] = { |
| 1594 | llvm::ConstantInt::get(IntTy, (int)IvarNames.size()), |
| 1595 | llvm::ConstantArray::get(ObjCIvarArrayTy, Ivars)}; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1596 | // Structure containing array and array count |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1597 | llvm::StructType *ObjCIvarListTy = llvm::StructType::get(IntTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1598 | ObjCIvarArrayTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1599 | nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1600 | |
| 1601 | // Create an instance of the structure |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1602 | return MakeGlobal(ObjCIvarListTy, Elements, CGM.getPointerAlign(), |
| 1603 | ".objc_ivar_list"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1604 | } |
| 1605 | |
| 1606 | /// Generate a class structure |
| 1607 | llvm::Constant *CGObjCGNU::GenerateClassStructure( |
| 1608 | llvm::Constant *MetaClass, |
| 1609 | llvm::Constant *SuperClass, |
| 1610 | unsigned info, |
Chris Lattner | d002cc6 | 2008-06-26 04:47:04 +0000 | [diff] [blame] | 1611 | const char *Name, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1612 | llvm::Constant *Version, |
| 1613 | llvm::Constant *InstanceSize, |
| 1614 | llvm::Constant *IVars, |
| 1615 | llvm::Constant *Methods, |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1616 | llvm::Constant *Protocols, |
| 1617 | llvm::Constant *IvarOffsets, |
David Chisnall | 8c757f9 | 2010-04-28 14:29:56 +0000 | [diff] [blame] | 1618 | llvm::Constant *Properties, |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 1619 | llvm::Constant *StrongIvarBitmap, |
| 1620 | llvm::Constant *WeakIvarBitmap, |
David Chisnall | 8c757f9 | 2010-04-28 14:29:56 +0000 | [diff] [blame] | 1621 | bool isMeta) { |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1622 | // Set up the class structure |
| 1623 | // Note: Several of these are char*s when they should be ids. This is |
| 1624 | // because the runtime performs this translation on load. |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1625 | // |
| 1626 | // Fields marked New ABI are part of the GNUstep runtime. We emit them |
| 1627 | // anyway; the classes will still work with the GNU runtime, they will just |
| 1628 | // be ignored. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1629 | llvm::StructType *ClassTy = llvm::StructType::get( |
David Chisnall | 13df6f6 | 2012-01-04 12:02:13 +0000 | [diff] [blame] | 1630 | PtrToInt8Ty, // isa |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1631 | PtrToInt8Ty, // super_class |
| 1632 | PtrToInt8Ty, // name |
| 1633 | LongTy, // version |
| 1634 | LongTy, // info |
| 1635 | LongTy, // instance_size |
| 1636 | IVars->getType(), // ivars |
| 1637 | Methods->getType(), // methods |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1638 | // These are all filled in by the runtime, so we pretend |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1639 | PtrTy, // dtable |
| 1640 | PtrTy, // subclass_list |
| 1641 | PtrTy, // sibling_class |
| 1642 | PtrTy, // protocols |
| 1643 | PtrTy, // gc_object_type |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1644 | // New ABI: |
| 1645 | LongTy, // abi_version |
| 1646 | IvarOffsets->getType(), // ivar_offsets |
| 1647 | Properties->getType(), // properties |
David Chisnall | 9d06ba8 | 2011-10-25 10:12:21 +0000 | [diff] [blame] | 1648 | IntPtrTy, // strong_pointers |
| 1649 | IntPtrTy, // weak_pointers |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1650 | nullptr); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1651 | llvm::Constant *Zero = llvm::ConstantInt::get(LongTy, 0); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1652 | // Fill in the structure |
| 1653 | std::vector<llvm::Constant*> Elements; |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1654 | Elements.push_back(llvm::ConstantExpr::getBitCast(MetaClass, PtrToInt8Ty)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1655 | Elements.push_back(SuperClass); |
Chris Lattner | d002cc6 | 2008-06-26 04:47:04 +0000 | [diff] [blame] | 1656 | Elements.push_back(MakeConstantString(Name, ".class_name")); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1657 | Elements.push_back(Zero); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1658 | Elements.push_back(llvm::ConstantInt::get(LongTy, info)); |
David Chisnall | 05f3a50 | 2011-02-21 23:47:40 +0000 | [diff] [blame] | 1659 | if (isMeta) { |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 1660 | llvm::DataLayout td(&TheModule); |
Ken Dyck | e0afc89 | 2011-04-22 17:59:22 +0000 | [diff] [blame] | 1661 | Elements.push_back( |
| 1662 | llvm::ConstantInt::get(LongTy, |
| 1663 | td.getTypeSizeInBits(ClassTy) / |
| 1664 | CGM.getContext().getCharWidth())); |
David Chisnall | 05f3a50 | 2011-02-21 23:47:40 +0000 | [diff] [blame] | 1665 | } else |
| 1666 | Elements.push_back(InstanceSize); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1667 | Elements.push_back(IVars); |
| 1668 | Elements.push_back(Methods); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1669 | Elements.push_back(NULLPtr); |
| 1670 | Elements.push_back(NULLPtr); |
| 1671 | Elements.push_back(NULLPtr); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1672 | Elements.push_back(llvm::ConstantExpr::getBitCast(Protocols, PtrTy)); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1673 | Elements.push_back(NULLPtr); |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 1674 | Elements.push_back(llvm::ConstantInt::get(LongTy, 1)); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1675 | Elements.push_back(IvarOffsets); |
| 1676 | Elements.push_back(Properties); |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 1677 | Elements.push_back(StrongIvarBitmap); |
| 1678 | Elements.push_back(WeakIvarBitmap); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1679 | // Create an instance of the structure |
David Chisnall | 41d63ed | 2010-01-08 00:14:31 +0000 | [diff] [blame] | 1680 | // This is now an externally visible symbol, so that we can speed up class |
David Chisnall | 13df6f6 | 2012-01-04 12:02:13 +0000 | [diff] [blame] | 1681 | // messages in the next ABI. We may already have some weak references to |
| 1682 | // this, so check and fix them properly. |
| 1683 | std::string ClassSym((isMeta ? "_OBJC_METACLASS_": "_OBJC_CLASS_") + |
| 1684 | std::string(Name)); |
| 1685 | llvm::GlobalVariable *ClassRef = TheModule.getNamedGlobal(ClassSym); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1686 | llvm::Constant *Class = |
| 1687 | MakeGlobal(ClassTy, Elements, CGM.getPointerAlign(), ClassSym, |
| 1688 | llvm::GlobalValue::ExternalLinkage); |
David Chisnall | 13df6f6 | 2012-01-04 12:02:13 +0000 | [diff] [blame] | 1689 | if (ClassRef) { |
| 1690 | ClassRef->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(Class, |
| 1691 | ClassRef->getType())); |
| 1692 | ClassRef->removeFromParent(); |
| 1693 | Class->setName(ClassSym); |
| 1694 | } |
| 1695 | return Class; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1696 | } |
| 1697 | |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 1698 | llvm::Constant *CGObjCGNU:: |
| 1699 | GenerateProtocolMethodList(ArrayRef<llvm::Constant *> MethodNames, |
| 1700 | ArrayRef<llvm::Constant *> MethodTypes) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1701 | // Get the method structure type. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1702 | llvm::StructType *ObjCMethodDescTy = llvm::StructType::get( |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1703 | PtrToInt8Ty, // Really a selector, but the runtime does the casting for us. |
| 1704 | PtrToInt8Ty, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1705 | nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1706 | std::vector<llvm::Constant*> Methods; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1707 | for (unsigned int i = 0, e = MethodTypes.size() ; i < e ; i++) { |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1708 | Methods.push_back(llvm::ConstantStruct::get( |
| 1709 | ObjCMethodDescTy, {MethodNames[i], MethodTypes[i]})); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1710 | } |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1711 | llvm::ArrayType *ObjCMethodArrayTy = llvm::ArrayType::get(ObjCMethodDescTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1712 | MethodNames.size()); |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 1713 | llvm::Constant *Array = llvm::ConstantArray::get(ObjCMethodArrayTy, |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 1714 | Methods); |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1715 | llvm::StructType *ObjCMethodDescListTy = llvm::StructType::get( |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1716 | IntTy, ObjCMethodArrayTy, nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1717 | Methods.clear(); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1718 | Methods.push_back(llvm::ConstantInt::get(IntTy, MethodNames.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1719 | Methods.push_back(Array); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1720 | return MakeGlobal(ObjCMethodDescListTy, Methods, CGM.getPointerAlign(), |
| 1721 | ".objc_method_list"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1722 | } |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 1723 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1724 | // Create the protocol list structure used in classes, categories and so on |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 1725 | llvm::Constant *CGObjCGNU::GenerateProtocolList(ArrayRef<std::string>Protocols){ |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1726 | llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrToInt8Ty, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1727 | Protocols.size()); |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1728 | llvm::StructType *ProtocolListTy = llvm::StructType::get( |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1729 | PtrTy, //Should be a recurisve pointer, but it's always NULL here. |
David Chisnall | 8fac25d | 2010-12-26 22:13:16 +0000 | [diff] [blame] | 1730 | SizeTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1731 | ProtocolArrayTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1732 | nullptr); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1733 | std::vector<llvm::Constant*> Elements; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1734 | for (const std::string *iter = Protocols.begin(), *endIter = Protocols.end(); |
| 1735 | iter != endIter ; iter++) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1736 | llvm::Constant *protocol = nullptr; |
David Chisnall | ff80fab | 2009-11-20 14:50:59 +0000 | [diff] [blame] | 1737 | llvm::StringMap<llvm::Constant*>::iterator value = |
| 1738 | ExistingProtocols.find(*iter); |
| 1739 | if (value == ExistingProtocols.end()) { |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1740 | protocol = GenerateEmptyProtocol(*iter); |
David Chisnall | ff80fab | 2009-11-20 14:50:59 +0000 | [diff] [blame] | 1741 | } else { |
| 1742 | protocol = value->getValue(); |
| 1743 | } |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1744 | llvm::Constant *Ptr = llvm::ConstantExpr::getBitCast(protocol, |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 1745 | PtrToInt8Ty); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1746 | Elements.push_back(Ptr); |
| 1747 | } |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 1748 | llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1749 | Elements); |
| 1750 | Elements.clear(); |
| 1751 | Elements.push_back(NULLPtr); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1752 | Elements.push_back(llvm::ConstantInt::get(LongTy, Protocols.size())); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1753 | Elements.push_back(ProtocolArray); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1754 | return MakeGlobal(ProtocolListTy, Elements, CGM.getPointerAlign(), |
| 1755 | ".objc_protocol_list"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1756 | } |
| 1757 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1758 | llvm::Value *CGObjCGNU::GenerateProtocolRef(CodeGenFunction &CGF, |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 1759 | const ObjCProtocolDecl *PD) { |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1760 | llvm::Value *protocol = ExistingProtocols[PD->getNameAsString()]; |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1761 | llvm::Type *T = |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1762 | CGM.getTypes().ConvertType(CGM.getContext().getObjCProtoType()); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1763 | return CGF.Builder.CreateBitCast(protocol, llvm::PointerType::getUnqual(T)); |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1764 | } |
| 1765 | |
| 1766 | llvm::Constant *CGObjCGNU::GenerateEmptyProtocol( |
| 1767 | const std::string &ProtocolName) { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1768 | SmallVector<std::string, 0> EmptyStringVector; |
| 1769 | SmallVector<llvm::Constant*, 0> EmptyConstantVector; |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1770 | |
| 1771 | llvm::Constant *ProtocolList = GenerateProtocolList(EmptyStringVector); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1772 | llvm::Constant *MethodList = |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1773 | GenerateProtocolMethodList(EmptyConstantVector, EmptyConstantVector); |
| 1774 | // Protocols are objects containing lists of the methods implemented and |
| 1775 | // protocols adopted. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1776 | llvm::StructType *ProtocolTy = llvm::StructType::get(IdTy, |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1777 | PtrToInt8Ty, |
| 1778 | ProtocolList->getType(), |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1779 | MethodList->getType(), |
| 1780 | MethodList->getType(), |
| 1781 | MethodList->getType(), |
| 1782 | MethodList->getType(), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1783 | nullptr); |
Fariborz Jahanian | f8c4f54 | 2009-03-31 18:27:22 +0000 | [diff] [blame] | 1784 | // The isa pointer must be set to a magic number so the runtime knows it's |
| 1785 | // the correct layout. |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1786 | llvm::Constant *Elements[] = { |
| 1787 | llvm::ConstantExpr::getIntToPtr( |
| 1788 | llvm::ConstantInt::get(Int32Ty, ProtocolVersion), IdTy), |
| 1789 | MakeConstantString(ProtocolName, ".objc_protocol_name"), ProtocolList, |
| 1790 | MethodList, MethodList, MethodList, MethodList}; |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1791 | return MakeGlobal(ProtocolTy, Elements, CGM.getPointerAlign(), |
| 1792 | ".objc_protocol"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1793 | } |
| 1794 | |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 1795 | void CGObjCGNU::GenerateProtocol(const ObjCProtocolDecl *PD) { |
| 1796 | ASTContext &Context = CGM.getContext(); |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 1797 | std::string ProtocolName = PD->getNameAsString(); |
Douglas Gregor | 1d784b2 | 2012-01-01 19:51:50 +0000 | [diff] [blame] | 1798 | |
| 1799 | // Use the protocol definition, if there is one. |
| 1800 | if (const ObjCProtocolDecl *Def = PD->getDefinition()) |
| 1801 | PD = Def; |
| 1802 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1803 | SmallVector<std::string, 16> Protocols; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1804 | for (const auto *PI : PD->protocols()) |
| 1805 | Protocols.push_back(PI->getNameAsString()); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1806 | SmallVector<llvm::Constant*, 16> InstanceMethodNames; |
| 1807 | SmallVector<llvm::Constant*, 16> InstanceMethodTypes; |
| 1808 | SmallVector<llvm::Constant*, 16> OptionalInstanceMethodNames; |
| 1809 | SmallVector<llvm::Constant*, 16> OptionalInstanceMethodTypes; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1810 | for (const auto *I : PD->instance_methods()) { |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 1811 | std::string TypeStr; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1812 | Context.getObjCEncodingForMethodDecl(I, TypeStr); |
| 1813 | if (I->getImplementationControl() == ObjCMethodDecl::Optional) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1814 | OptionalInstanceMethodNames.push_back( |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1815 | MakeConstantString(I->getSelector().getAsString())); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1816 | OptionalInstanceMethodTypes.push_back(MakeConstantString(TypeStr)); |
David Chisnall | a904e01 | 2012-08-23 12:17:21 +0000 | [diff] [blame] | 1817 | } else { |
| 1818 | InstanceMethodNames.push_back( |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1819 | MakeConstantString(I->getSelector().getAsString())); |
David Chisnall | a904e01 | 2012-08-23 12:17:21 +0000 | [diff] [blame] | 1820 | InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1821 | } |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 1822 | } |
| 1823 | // Collect information about class methods: |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1824 | SmallVector<llvm::Constant*, 16> ClassMethodNames; |
| 1825 | SmallVector<llvm::Constant*, 16> ClassMethodTypes; |
| 1826 | SmallVector<llvm::Constant*, 16> OptionalClassMethodNames; |
| 1827 | SmallVector<llvm::Constant*, 16> OptionalClassMethodTypes; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1828 | for (const auto *I : PD->class_methods()) { |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 1829 | std::string TypeStr; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1830 | Context.getObjCEncodingForMethodDecl(I,TypeStr); |
| 1831 | if (I->getImplementationControl() == ObjCMethodDecl::Optional) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1832 | OptionalClassMethodNames.push_back( |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1833 | MakeConstantString(I->getSelector().getAsString())); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1834 | OptionalClassMethodTypes.push_back(MakeConstantString(TypeStr)); |
David Chisnall | a904e01 | 2012-08-23 12:17:21 +0000 | [diff] [blame] | 1835 | } else { |
| 1836 | ClassMethodNames.push_back( |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1837 | MakeConstantString(I->getSelector().getAsString())); |
David Chisnall | a904e01 | 2012-08-23 12:17:21 +0000 | [diff] [blame] | 1838 | ClassMethodTypes.push_back(MakeConstantString(TypeStr)); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1839 | } |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 1840 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1841 | |
| 1842 | llvm::Constant *ProtocolList = GenerateProtocolList(Protocols); |
| 1843 | llvm::Constant *InstanceMethodList = |
| 1844 | GenerateProtocolMethodList(InstanceMethodNames, InstanceMethodTypes); |
| 1845 | llvm::Constant *ClassMethodList = |
| 1846 | GenerateProtocolMethodList(ClassMethodNames, ClassMethodTypes); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1847 | llvm::Constant *OptionalInstanceMethodList = |
| 1848 | GenerateProtocolMethodList(OptionalInstanceMethodNames, |
| 1849 | OptionalInstanceMethodTypes); |
| 1850 | llvm::Constant *OptionalClassMethodList = |
| 1851 | GenerateProtocolMethodList(OptionalClassMethodNames, |
| 1852 | OptionalClassMethodTypes); |
| 1853 | |
| 1854 | // Property metadata: name, attributes, isSynthesized, setter name, setter |
| 1855 | // types, getter name, getter types. |
| 1856 | // The isSynthesized value is always set to 0 in a protocol. It exists to |
| 1857 | // simplify the runtime library by allowing it to use the same data |
| 1858 | // structures for protocol metadata everywhere. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1859 | llvm::StructType *PropertyMetadataTy = llvm::StructType::get( |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 1860 | PtrToInt8Ty, Int8Ty, Int8Ty, Int8Ty, Int8Ty, PtrToInt8Ty, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1861 | PtrToInt8Ty, PtrToInt8Ty, PtrToInt8Ty, nullptr); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1862 | std::vector<llvm::Constant*> Properties; |
| 1863 | std::vector<llvm::Constant*> OptionalProperties; |
| 1864 | |
| 1865 | // Add all of the property methods need adding to the method list and to the |
| 1866 | // property metadata list. |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1867 | for (auto *property : PD->instance_properties()) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1868 | std::vector<llvm::Constant*> Fields; |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1869 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1870 | Fields.push_back(MakePropertyEncodingString(property, nullptr)); |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 1871 | PushPropertyAttributes(Fields, property); |
David Chisnall | 891dac7 | 2012-10-16 15:11:55 +0000 | [diff] [blame] | 1872 | |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1873 | if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { |
| 1874 | std::string TypeStr; |
| 1875 | Context.getObjCEncodingForMethodDecl(getter,TypeStr); |
| 1876 | llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); |
| 1877 | InstanceMethodTypes.push_back(TypeEncoding); |
| 1878 | Fields.push_back(MakeConstantString(getter->getSelector().getAsString())); |
| 1879 | Fields.push_back(TypeEncoding); |
| 1880 | } else { |
| 1881 | Fields.push_back(NULLPtr); |
| 1882 | Fields.push_back(NULLPtr); |
| 1883 | } |
| 1884 | if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { |
| 1885 | std::string TypeStr; |
| 1886 | Context.getObjCEncodingForMethodDecl(setter,TypeStr); |
| 1887 | llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); |
| 1888 | InstanceMethodTypes.push_back(TypeEncoding); |
| 1889 | Fields.push_back(MakeConstantString(setter->getSelector().getAsString())); |
| 1890 | Fields.push_back(TypeEncoding); |
| 1891 | } else { |
| 1892 | Fields.push_back(NULLPtr); |
| 1893 | Fields.push_back(NULLPtr); |
| 1894 | } |
| 1895 | if (property->getPropertyImplementation() == ObjCPropertyDecl::Optional) { |
| 1896 | OptionalProperties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); |
| 1897 | } else { |
| 1898 | Properties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); |
| 1899 | } |
| 1900 | } |
| 1901 | llvm::Constant *PropertyArray = llvm::ConstantArray::get( |
| 1902 | llvm::ArrayType::get(PropertyMetadataTy, Properties.size()), Properties); |
| 1903 | llvm::Constant* PropertyListInitFields[] = |
| 1904 | {llvm::ConstantInt::get(IntTy, Properties.size()), NULLPtr, PropertyArray}; |
| 1905 | |
| 1906 | llvm::Constant *PropertyListInit = |
Chris Lattner | c5cbb90 | 2011-06-20 04:01:35 +0000 | [diff] [blame] | 1907 | llvm::ConstantStruct::getAnon(PropertyListInitFields); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1908 | llvm::Constant *PropertyList = new llvm::GlobalVariable(TheModule, |
| 1909 | PropertyListInit->getType(), false, llvm::GlobalValue::InternalLinkage, |
| 1910 | PropertyListInit, ".objc_property_list"); |
| 1911 | |
| 1912 | llvm::Constant *OptionalPropertyArray = |
| 1913 | llvm::ConstantArray::get(llvm::ArrayType::get(PropertyMetadataTy, |
| 1914 | OptionalProperties.size()) , OptionalProperties); |
| 1915 | llvm::Constant* OptionalPropertyListInitFields[] = { |
| 1916 | llvm::ConstantInt::get(IntTy, OptionalProperties.size()), NULLPtr, |
| 1917 | OptionalPropertyArray }; |
| 1918 | |
| 1919 | llvm::Constant *OptionalPropertyListInit = |
Chris Lattner | c5cbb90 | 2011-06-20 04:01:35 +0000 | [diff] [blame] | 1920 | llvm::ConstantStruct::getAnon(OptionalPropertyListInitFields); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1921 | llvm::Constant *OptionalPropertyList = new llvm::GlobalVariable(TheModule, |
| 1922 | OptionalPropertyListInit->getType(), false, |
| 1923 | llvm::GlobalValue::InternalLinkage, OptionalPropertyListInit, |
| 1924 | ".objc_property_list"); |
| 1925 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1926 | // Protocols are objects containing lists of the methods implemented and |
| 1927 | // protocols adopted. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1928 | llvm::StructType *ProtocolTy = llvm::StructType::get(IdTy, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1929 | PtrToInt8Ty, |
| 1930 | ProtocolList->getType(), |
| 1931 | InstanceMethodList->getType(), |
| 1932 | ClassMethodList->getType(), |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1933 | OptionalInstanceMethodList->getType(), |
| 1934 | OptionalClassMethodList->getType(), |
| 1935 | PropertyList->getType(), |
| 1936 | OptionalPropertyList->getType(), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1937 | nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1938 | // The isa pointer must be set to a magic number so the runtime knows it's |
| 1939 | // the correct layout. |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 1940 | llvm::Constant *Elements[] = { |
| 1941 | llvm::ConstantExpr::getIntToPtr( |
| 1942 | llvm::ConstantInt::get(Int32Ty, ProtocolVersion), IdTy), |
| 1943 | MakeConstantString(ProtocolName, ".objc_protocol_name"), ProtocolList, |
| 1944 | InstanceMethodList, ClassMethodList, OptionalInstanceMethodList, |
| 1945 | OptionalClassMethodList, PropertyList, OptionalPropertyList}; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1946 | ExistingProtocols[ProtocolName] = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1947 | llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolTy, Elements, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1948 | CGM.getPointerAlign(), ".objc_protocol"), IdTy); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1949 | } |
Dmitri Gribenko | c4a7790 | 2012-11-15 14:28:07 +0000 | [diff] [blame] | 1950 | void CGObjCGNU::GenerateProtocolHolderCategory() { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1951 | // Collect information about instance methods |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1952 | SmallVector<Selector, 1> MethodSels; |
| 1953 | SmallVector<llvm::Constant*, 1> MethodTypes; |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1954 | |
| 1955 | std::vector<llvm::Constant*> Elements; |
| 1956 | const std::string ClassName = "__ObjC_Protocol_Holder_Ugly_Hack"; |
| 1957 | const std::string CategoryName = "AnotherHack"; |
| 1958 | Elements.push_back(MakeConstantString(CategoryName)); |
| 1959 | Elements.push_back(MakeConstantString(ClassName)); |
| 1960 | // Instance method list |
| 1961 | Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( |
| 1962 | ClassName, CategoryName, MethodSels, MethodTypes, false), PtrTy)); |
| 1963 | // Class method list |
| 1964 | Elements.push_back(llvm::ConstantExpr::getBitCast(GenerateMethodList( |
| 1965 | ClassName, CategoryName, MethodSels, MethodTypes, true), PtrTy)); |
| 1966 | // Protocol list |
| 1967 | llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(PtrTy, |
| 1968 | ExistingProtocols.size()); |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1969 | llvm::StructType *ProtocolListTy = llvm::StructType::get( |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1970 | PtrTy, //Should be a recurisve pointer, but it's always NULL here. |
David Chisnall | 8fac25d | 2010-12-26 22:13:16 +0000 | [diff] [blame] | 1971 | SizeTy, |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1972 | ProtocolArrayTy, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1973 | nullptr); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1974 | std::vector<llvm::Constant*> ProtocolElements; |
| 1975 | for (llvm::StringMapIterator<llvm::Constant*> iter = |
| 1976 | ExistingProtocols.begin(), endIter = ExistingProtocols.end(); |
| 1977 | iter != endIter ; iter++) { |
| 1978 | llvm::Constant *Ptr = llvm::ConstantExpr::getBitCast(iter->getValue(), |
| 1979 | PtrTy); |
| 1980 | ProtocolElements.push_back(Ptr); |
| 1981 | } |
| 1982 | llvm::Constant * ProtocolArray = llvm::ConstantArray::get(ProtocolArrayTy, |
| 1983 | ProtocolElements); |
| 1984 | ProtocolElements.clear(); |
| 1985 | ProtocolElements.push_back(NULLPtr); |
| 1986 | ProtocolElements.push_back(llvm::ConstantInt::get(LongTy, |
| 1987 | ExistingProtocols.size())); |
| 1988 | ProtocolElements.push_back(ProtocolArray); |
| 1989 | Elements.push_back(llvm::ConstantExpr::getBitCast(MakeGlobal(ProtocolListTy, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1990 | ProtocolElements, CGM.getPointerAlign(), |
| 1991 | ".objc_protocol_list"), PtrTy)); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1992 | Categories.push_back(llvm::ConstantExpr::getBitCast( |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 1993 | MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 1994 | PtrTy, PtrTy, PtrTy, nullptr), Elements, CGM.getPointerAlign()), |
| 1995 | PtrTy)); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 1996 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 1997 | |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 1998 | /// Libobjc2 uses a bitfield representation where small(ish) bitfields are |
| 1999 | /// stored in a 64-bit value with the low bit set to 1 and the remaining 63 |
| 2000 | /// bits set to their values, LSB first, while larger ones are stored in a |
| 2001 | /// structure of this / form: |
| 2002 | /// |
| 2003 | /// struct { int32_t length; int32_t values[length]; }; |
| 2004 | /// |
| 2005 | /// The values in the array are stored in host-endian format, with the least |
| 2006 | /// significant bit being assumed to come first in the bitfield. Therefore, a |
| 2007 | /// bitfield with the 64th bit set will be (int64_t)&{ 2, [0, 1<<31] }, while a |
| 2008 | /// bitfield / with the 63rd bit set will be 1<<64. |
Bill Wendling | 795b100 | 2012-02-22 09:30:11 +0000 | [diff] [blame] | 2009 | llvm::Constant *CGObjCGNU::MakeBitField(ArrayRef<bool> bits) { |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2010 | int bitCount = bits.size(); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2011 | int ptrBits = CGM.getDataLayout().getPointerSizeInBits(); |
David Chisnall | 9d06ba8 | 2011-10-25 10:12:21 +0000 | [diff] [blame] | 2012 | if (bitCount < ptrBits) { |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2013 | uint64_t val = 1; |
| 2014 | for (int i=0 ; i<bitCount ; ++i) { |
Eli Friedman | e3c944a | 2011-10-08 01:03:47 +0000 | [diff] [blame] | 2015 | if (bits[i]) val |= 1ULL<<(i+1); |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2016 | } |
David Chisnall | 9d06ba8 | 2011-10-25 10:12:21 +0000 | [diff] [blame] | 2017 | return llvm::ConstantInt::get(IntPtrTy, val); |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2018 | } |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 2019 | SmallVector<llvm::Constant *, 8> values; |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2020 | int v=0; |
| 2021 | while (v < bitCount) { |
| 2022 | int32_t word = 0; |
| 2023 | for (int i=0 ; (i<32) && (v<bitCount) ; ++i) { |
| 2024 | if (bits[v]) word |= 1<<i; |
| 2025 | v++; |
| 2026 | } |
| 2027 | values.push_back(llvm::ConstantInt::get(Int32Ty, word)); |
| 2028 | } |
| 2029 | llvm::ArrayType *arrayTy = llvm::ArrayType::get(Int32Ty, values.size()); |
| 2030 | llvm::Constant *array = llvm::ConstantArray::get(arrayTy, values); |
| 2031 | llvm::Constant *fields[2] = { |
| 2032 | llvm::ConstantInt::get(Int32Ty, values.size()), |
| 2033 | array }; |
| 2034 | llvm::Constant *GS = MakeGlobal(llvm::StructType::get(Int32Ty, arrayTy, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2035 | nullptr), fields, CharUnits::fromQuantity(4)); |
David Chisnall | 49de528 | 2011-10-08 08:54:36 +0000 | [diff] [blame] | 2036 | llvm::Constant *ptr = llvm::ConstantExpr::getPtrToInt(GS, IntPtrTy); |
David Chisnall | 49de528 | 2011-10-08 08:54:36 +0000 | [diff] [blame] | 2037 | return ptr; |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2038 | } |
| 2039 | |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2040 | void CGObjCGNU::GenerateCategory(const ObjCCategoryImplDecl *OCD) { |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 2041 | std::string ClassName = OCD->getClassInterface()->getNameAsString(); |
| 2042 | std::string CategoryName = OCD->getNameAsString(); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2043 | // Collect information about instance methods |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2044 | SmallVector<Selector, 16> InstanceMethodSels; |
| 2045 | SmallVector<llvm::Constant*, 16> InstanceMethodTypes; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2046 | for (const auto *I : OCD->instance_methods()) { |
| 2047 | InstanceMethodSels.push_back(I->getSelector()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2048 | std::string TypeStr; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2049 | CGM.getContext().getObjCEncodingForMethodDecl(I,TypeStr); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2050 | InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2051 | } |
| 2052 | |
| 2053 | // Collect information about class methods |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2054 | SmallVector<Selector, 16> ClassMethodSels; |
| 2055 | SmallVector<llvm::Constant*, 16> ClassMethodTypes; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2056 | for (const auto *I : OCD->class_methods()) { |
| 2057 | ClassMethodSels.push_back(I->getSelector()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2058 | std::string TypeStr; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2059 | CGM.getContext().getObjCEncodingForMethodDecl(I,TypeStr); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2060 | ClassMethodTypes.push_back(MakeConstantString(TypeStr)); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2061 | } |
| 2062 | |
| 2063 | // Collect the names of referenced protocols |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2064 | SmallVector<std::string, 16> Protocols; |
David Chisnall | ad9e06d | 2010-03-13 22:20:45 +0000 | [diff] [blame] | 2065 | const ObjCCategoryDecl *CatDecl = OCD->getCategoryDecl(); |
| 2066 | const ObjCList<ObjCProtocolDecl> &Protos = CatDecl->getReferencedProtocols(); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2067 | for (ObjCList<ObjCProtocolDecl>::iterator I = Protos.begin(), |
| 2068 | E = Protos.end(); I != E; ++I) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 2069 | Protocols.push_back((*I)->getNameAsString()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2070 | |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 2071 | llvm::Constant *Elements[] = { |
| 2072 | MakeConstantString(CategoryName), MakeConstantString(ClassName), |
| 2073 | // Instance method list |
| 2074 | llvm::ConstantExpr::getBitCast( |
| 2075 | GenerateMethodList(ClassName, CategoryName, InstanceMethodSels, |
| 2076 | InstanceMethodTypes, false), |
| 2077 | PtrTy), |
| 2078 | // Class method list |
| 2079 | llvm::ConstantExpr::getBitCast(GenerateMethodList(ClassName, CategoryName, |
| 2080 | ClassMethodSels, |
| 2081 | ClassMethodTypes, true), |
| 2082 | PtrTy), |
| 2083 | // Protocol list |
| 2084 | llvm::ConstantExpr::getBitCast(GenerateProtocolList(Protocols), PtrTy)}; |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2085 | Categories.push_back(llvm::ConstantExpr::getBitCast( |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 2086 | MakeGlobal(llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2087 | PtrTy, PtrTy, PtrTy, nullptr), Elements, CGM.getPointerAlign()), |
| 2088 | PtrTy)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2089 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2090 | |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2091 | llvm::Constant *CGObjCGNU::GeneratePropertyList(const ObjCImplementationDecl *OID, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2092 | SmallVectorImpl<Selector> &InstanceMethodSels, |
| 2093 | SmallVectorImpl<llvm::Constant*> &InstanceMethodTypes) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2094 | ASTContext &Context = CGM.getContext(); |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 2095 | // Property metadata: name, attributes, attributes2, padding1, padding2, |
| 2096 | // setter name, setter types, getter name, getter types. |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 2097 | llvm::StructType *PropertyMetadataTy = llvm::StructType::get( |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 2098 | PtrToInt8Ty, Int8Ty, Int8Ty, Int8Ty, Int8Ty, PtrToInt8Ty, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2099 | PtrToInt8Ty, PtrToInt8Ty, PtrToInt8Ty, nullptr); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2100 | std::vector<llvm::Constant*> Properties; |
| 2101 | |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2102 | // Add all of the property methods need adding to the method list and to the |
| 2103 | // property metadata list. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2104 | for (auto *propertyImpl : OID->property_impls()) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2105 | std::vector<llvm::Constant*> Fields; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2106 | ObjCPropertyDecl *property = propertyImpl->getPropertyDecl(); |
David Chisnall | 42ba04a | 2010-02-26 01:11:38 +0000 | [diff] [blame] | 2107 | bool isSynthesized = (propertyImpl->getPropertyImplementation() == |
| 2108 | ObjCPropertyImplDecl::Synthesize); |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 2109 | bool isDynamic = (propertyImpl->getPropertyImplementation() == |
| 2110 | ObjCPropertyImplDecl::Dynamic); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2111 | |
David Chisnall | 891dac7 | 2012-10-16 15:11:55 +0000 | [diff] [blame] | 2112 | Fields.push_back(MakePropertyEncodingString(property, OID)); |
David Chisnall | de38cb1 | 2013-02-28 13:59:29 +0000 | [diff] [blame] | 2113 | PushPropertyAttributes(Fields, property, isSynthesized, isDynamic); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2114 | if (ObjCMethodDecl *getter = property->getGetterMethodDecl()) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2115 | std::string TypeStr; |
| 2116 | Context.getObjCEncodingForMethodDecl(getter,TypeStr); |
| 2117 | llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); |
David Chisnall | 42ba04a | 2010-02-26 01:11:38 +0000 | [diff] [blame] | 2118 | if (isSynthesized) { |
| 2119 | InstanceMethodTypes.push_back(TypeEncoding); |
| 2120 | InstanceMethodSels.push_back(getter->getSelector()); |
| 2121 | } |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2122 | Fields.push_back(MakeConstantString(getter->getSelector().getAsString())); |
| 2123 | Fields.push_back(TypeEncoding); |
| 2124 | } else { |
| 2125 | Fields.push_back(NULLPtr); |
| 2126 | Fields.push_back(NULLPtr); |
| 2127 | } |
| 2128 | if (ObjCMethodDecl *setter = property->getSetterMethodDecl()) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2129 | std::string TypeStr; |
| 2130 | Context.getObjCEncodingForMethodDecl(setter,TypeStr); |
| 2131 | llvm::Constant *TypeEncoding = MakeConstantString(TypeStr); |
David Chisnall | 42ba04a | 2010-02-26 01:11:38 +0000 | [diff] [blame] | 2132 | if (isSynthesized) { |
| 2133 | InstanceMethodTypes.push_back(TypeEncoding); |
| 2134 | InstanceMethodSels.push_back(setter->getSelector()); |
| 2135 | } |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2136 | Fields.push_back(MakeConstantString(setter->getSelector().getAsString())); |
| 2137 | Fields.push_back(TypeEncoding); |
| 2138 | } else { |
| 2139 | Fields.push_back(NULLPtr); |
| 2140 | Fields.push_back(NULLPtr); |
| 2141 | } |
| 2142 | Properties.push_back(llvm::ConstantStruct::get(PropertyMetadataTy, Fields)); |
| 2143 | } |
| 2144 | llvm::ArrayType *PropertyArrayTy = |
| 2145 | llvm::ArrayType::get(PropertyMetadataTy, Properties.size()); |
| 2146 | llvm::Constant *PropertyArray = llvm::ConstantArray::get(PropertyArrayTy, |
| 2147 | Properties); |
| 2148 | llvm::Constant* PropertyListInitFields[] = |
| 2149 | {llvm::ConstantInt::get(IntTy, Properties.size()), NULLPtr, PropertyArray}; |
| 2150 | |
| 2151 | llvm::Constant *PropertyListInit = |
Chris Lattner | c5cbb90 | 2011-06-20 04:01:35 +0000 | [diff] [blame] | 2152 | llvm::ConstantStruct::getAnon(PropertyListInitFields); |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2153 | return new llvm::GlobalVariable(TheModule, PropertyListInit->getType(), false, |
| 2154 | llvm::GlobalValue::InternalLinkage, PropertyListInit, |
| 2155 | ".objc_property_list"); |
| 2156 | } |
| 2157 | |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2158 | void CGObjCGNU::RegisterAlias(const ObjCCompatibleAliasDecl *OAD) { |
| 2159 | // Get the class declaration for which the alias is specified. |
| 2160 | ObjCInterfaceDecl *ClassDecl = |
| 2161 | const_cast<ObjCInterfaceDecl *>(OAD->getClassInterface()); |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 2162 | ClassAliases.emplace_back(ClassDecl->getNameAsString(), |
| 2163 | OAD->getNameAsString()); |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2164 | } |
| 2165 | |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2166 | void CGObjCGNU::GenerateClass(const ObjCImplementationDecl *OID) { |
| 2167 | ASTContext &Context = CGM.getContext(); |
| 2168 | |
| 2169 | // Get the superclass name. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2170 | const ObjCInterfaceDecl * SuperClassDecl = |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2171 | OID->getClassInterface()->getSuperClass(); |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 2172 | std::string SuperClassName; |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 2173 | if (SuperClassDecl) { |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 2174 | SuperClassName = SuperClassDecl->getNameAsString(); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 2175 | EmitClassRef(SuperClassName); |
| 2176 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2177 | |
| 2178 | // Get the class name |
Chris Lattner | 09dc666 | 2009-04-01 02:00:48 +0000 | [diff] [blame] | 2179 | ObjCInterfaceDecl *ClassDecl = |
| 2180 | const_cast<ObjCInterfaceDecl *>(OID->getClassInterface()); |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 2181 | std::string ClassName = ClassDecl->getNameAsString(); |
Chris Lattner | 2a8e4e1 | 2009-06-15 01:09:11 +0000 | [diff] [blame] | 2182 | // Emit the symbol that is used to generate linker errors if this class is |
| 2183 | // referenced in other modules but not declared. |
Fariborz Jahanian | c51db23 | 2009-07-03 15:10:14 +0000 | [diff] [blame] | 2184 | std::string classSymbolName = "__objc_class_name_" + ClassName; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2185 | if (llvm::GlobalVariable *symbol = |
Fariborz Jahanian | c51db23 | 2009-07-03 15:10:14 +0000 | [diff] [blame] | 2186 | TheModule.getGlobalVariable(classSymbolName)) { |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 2187 | symbol->setInitializer(llvm::ConstantInt::get(LongTy, 0)); |
Fariborz Jahanian | c51db23 | 2009-07-03 15:10:14 +0000 | [diff] [blame] | 2188 | } else { |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 2189 | new llvm::GlobalVariable(TheModule, LongTy, false, |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 2190 | llvm::GlobalValue::ExternalLinkage, llvm::ConstantInt::get(LongTy, 0), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 2191 | classSymbolName); |
Fariborz Jahanian | c51db23 | 2009-07-03 15:10:14 +0000 | [diff] [blame] | 2192 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2193 | |
Daniel Dunbar | 2bebbf0 | 2009-05-03 10:46:44 +0000 | [diff] [blame] | 2194 | // Get the size of instances. |
Ken Dyck | 5f022d8 | 2011-02-09 01:59:34 +0000 | [diff] [blame] | 2195 | int instanceSize = |
| 2196 | Context.getASTObjCImplementationLayout(OID).getSize().getQuantity(); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2197 | |
| 2198 | // Collect information about instance variables. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2199 | SmallVector<llvm::Constant*, 16> IvarNames; |
| 2200 | SmallVector<llvm::Constant*, 16> IvarTypes; |
| 2201 | SmallVector<llvm::Constant*, 16> IvarOffsets; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2202 | |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2203 | std::vector<llvm::Constant*> IvarOffsetValues; |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2204 | SmallVector<bool, 16> WeakIvars; |
| 2205 | SmallVector<bool, 16> StrongIvars; |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2206 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2207 | int superInstanceSize = !SuperClassDecl ? 0 : |
Ken Dyck | 5f022d8 | 2011-02-09 01:59:34 +0000 | [diff] [blame] | 2208 | Context.getASTObjCInterfaceLayout(SuperClassDecl).getSize().getQuantity(); |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2209 | // For non-fragile ivars, set the instance size to 0 - {the size of just this |
| 2210 | // class}. The runtime will then set this to the correct value on load. |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2211 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2212 | instanceSize = 0 - (instanceSize - superInstanceSize); |
| 2213 | } |
David Chisnall | 7f63cb0 | 2010-04-19 00:45:34 +0000 | [diff] [blame] | 2214 | |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 2215 | for (const ObjCIvarDecl *IVD = ClassDecl->all_declared_ivar_begin(); IVD; |
| 2216 | IVD = IVD->getNextIvar()) { |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2217 | // Store the name |
David Chisnall | 7f63cb0 | 2010-04-19 00:45:34 +0000 | [diff] [blame] | 2218 | IvarNames.push_back(MakeConstantString(IVD->getNameAsString())); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2219 | // Get the type encoding for this ivar |
| 2220 | std::string TypeStr; |
David Chisnall | 7f63cb0 | 2010-04-19 00:45:34 +0000 | [diff] [blame] | 2221 | Context.getObjCEncodingForType(IVD->getType(), TypeStr); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2222 | IvarTypes.push_back(MakeConstantString(TypeStr)); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2223 | // Get the offset |
Eli Friedman | e5b4666 | 2012-11-06 22:15:52 +0000 | [diff] [blame] | 2224 | uint64_t BaseOffset = ComputeIvarBaseOffset(CGM, OID, IVD); |
David Chisnall | aecbf24 | 2009-11-17 19:32:15 +0000 | [diff] [blame] | 2225 | uint64_t Offset = BaseOffset; |
Richard Smith | 7edf9e3 | 2012-11-01 22:30:59 +0000 | [diff] [blame] | 2226 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2227 | Offset = BaseOffset - superInstanceSize; |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2228 | } |
David Chisnall | 63ff703 | 2011-07-07 12:34:51 +0000 | [diff] [blame] | 2229 | llvm::Constant *OffsetValue = llvm::ConstantInt::get(IntTy, Offset); |
| 2230 | // Create the direct offset value |
| 2231 | std::string OffsetName = "__objc_ivar_offset_value_" + ClassName +"." + |
| 2232 | IVD->getNameAsString(); |
| 2233 | llvm::GlobalVariable *OffsetVar = TheModule.getGlobalVariable(OffsetName); |
| 2234 | if (OffsetVar) { |
| 2235 | OffsetVar->setInitializer(OffsetValue); |
| 2236 | // If this is the real definition, change its linkage type so that |
| 2237 | // different modules will use this one, rather than their private |
| 2238 | // copy. |
| 2239 | OffsetVar->setLinkage(llvm::GlobalValue::ExternalLinkage); |
| 2240 | } else |
| 2241 | OffsetVar = new llvm::GlobalVariable(TheModule, IntTy, |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2242 | false, llvm::GlobalValue::ExternalLinkage, |
David Chisnall | 63ff703 | 2011-07-07 12:34:51 +0000 | [diff] [blame] | 2243 | OffsetValue, |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2244 | "__objc_ivar_offset_value_" + ClassName +"." + |
David Chisnall | 63ff703 | 2011-07-07 12:34:51 +0000 | [diff] [blame] | 2245 | IVD->getNameAsString()); |
| 2246 | IvarOffsets.push_back(OffsetValue); |
| 2247 | IvarOffsetValues.push_back(OffsetVar); |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2248 | Qualifiers::ObjCLifetime lt = IVD->getType().getQualifiers().getObjCLifetime(); |
| 2249 | switch (lt) { |
| 2250 | case Qualifiers::OCL_Strong: |
| 2251 | StrongIvars.push_back(true); |
| 2252 | WeakIvars.push_back(false); |
| 2253 | break; |
| 2254 | case Qualifiers::OCL_Weak: |
| 2255 | StrongIvars.push_back(false); |
| 2256 | WeakIvars.push_back(true); |
| 2257 | break; |
| 2258 | default: |
| 2259 | StrongIvars.push_back(false); |
| 2260 | WeakIvars.push_back(false); |
| 2261 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2262 | } |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2263 | llvm::Constant *StrongIvarBitmap = MakeBitField(StrongIvars); |
| 2264 | llvm::Constant *WeakIvarBitmap = MakeBitField(WeakIvars); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2265 | llvm::GlobalVariable *IvarOffsetArray = |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2266 | MakeGlobalArray(PtrToIntTy, IvarOffsetValues, CGM.getPointerAlign(), |
| 2267 | ".ivar.offsets"); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2268 | |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2269 | // Collect information about instance methods |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2270 | SmallVector<Selector, 16> InstanceMethodSels; |
| 2271 | SmallVector<llvm::Constant*, 16> InstanceMethodTypes; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2272 | for (const auto *I : OID->instance_methods()) { |
| 2273 | InstanceMethodSels.push_back(I->getSelector()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2274 | std::string TypeStr; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2275 | Context.getObjCEncodingForMethodDecl(I,TypeStr); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2276 | InstanceMethodTypes.push_back(MakeConstantString(TypeStr)); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2277 | } |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2278 | |
| 2279 | llvm::Constant *Properties = GeneratePropertyList(OID, InstanceMethodSels, |
| 2280 | InstanceMethodTypes); |
| 2281 | |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2282 | // Collect information about class methods |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2283 | SmallVector<Selector, 16> ClassMethodSels; |
| 2284 | SmallVector<llvm::Constant*, 16> ClassMethodTypes; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2285 | for (const auto *I : OID->class_methods()) { |
| 2286 | ClassMethodSels.push_back(I->getSelector()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2287 | std::string TypeStr; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2288 | Context.getObjCEncodingForMethodDecl(I,TypeStr); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2289 | ClassMethodTypes.push_back(MakeConstantString(TypeStr)); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2290 | } |
| 2291 | // Collect the names of referenced protocols |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2292 | SmallVector<std::string, 16> Protocols; |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2293 | for (const auto *I : ClassDecl->protocols()) |
| 2294 | Protocols.push_back(I->getNameAsString()); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2295 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2296 | // Get the superclass pointer. |
| 2297 | llvm::Constant *SuperClass; |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 2298 | if (!SuperClassName.empty()) { |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2299 | SuperClass = MakeConstantString(SuperClassName, ".super_class_name"); |
| 2300 | } else { |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 2301 | SuperClass = llvm::ConstantPointerNull::get(PtrToInt8Ty); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2302 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2303 | // Empty vector used to construct empty method lists |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2304 | SmallVector<llvm::Constant*, 1> empty; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2305 | // Generate the method and instance variable lists |
| 2306 | llvm::Constant *MethodList = GenerateMethodList(ClassName, "", |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 2307 | InstanceMethodSels, InstanceMethodTypes, false); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2308 | llvm::Constant *ClassMethodList = GenerateMethodList(ClassName, "", |
Chris Lattner | a421007 | 2008-06-26 05:08:00 +0000 | [diff] [blame] | 2309 | ClassMethodSels, ClassMethodTypes, true); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2310 | llvm::Constant *IvarList = GenerateIvarList(IvarNames, IvarTypes, |
| 2311 | IvarOffsets); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2312 | // Irrespective of whether we are compiling for a fragile or non-fragile ABI, |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2313 | // we emit a symbol containing the offset for each ivar in the class. This |
| 2314 | // allows code compiled for the non-Fragile ABI to inherit from code compiled |
| 2315 | // for the legacy ABI, without causing problems. The converse is also |
| 2316 | // possible, but causes all ivar accesses to be fragile. |
David Chisnall | e0d9876 | 2010-11-03 16:12:44 +0000 | [diff] [blame] | 2317 | |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2318 | // Offset pointer for getting at the correct field in the ivar list when |
| 2319 | // setting up the alias. These are: The base address for the global, the |
| 2320 | // ivar array (second field), the ivar in this list (set for each ivar), and |
| 2321 | // the offset (third field in ivar structure) |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2322 | llvm::Type *IndexTy = Int32Ty; |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2323 | llvm::Constant *offsetPointerIndexes[] = {Zeros[0], |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2324 | llvm::ConstantInt::get(IndexTy, 1), nullptr, |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2325 | llvm::ConstantInt::get(IndexTy, 2) }; |
| 2326 | |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 2327 | unsigned ivarIndex = 0; |
| 2328 | for (const ObjCIvarDecl *IVD = ClassDecl->all_declared_ivar_begin(); IVD; |
| 2329 | IVD = IVD->getNextIvar()) { |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2330 | const std::string Name = "__objc_ivar_offset_" + ClassName + '.' |
David Chisnall | e0d9876 | 2010-11-03 16:12:44 +0000 | [diff] [blame] | 2331 | + IVD->getNameAsString(); |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 2332 | offsetPointerIndexes[2] = llvm::ConstantInt::get(IndexTy, ivarIndex); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2333 | // Get the correct ivar field |
| 2334 | llvm::Constant *offsetValue = llvm::ConstantExpr::getGetElementPtr( |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 2335 | cast<llvm::GlobalVariable>(IvarList)->getValueType(), IvarList, |
| 2336 | offsetPointerIndexes); |
David Chisnall | e0d9876 | 2010-11-03 16:12:44 +0000 | [diff] [blame] | 2337 | // Get the existing variable, if one exists. |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2338 | llvm::GlobalVariable *offset = TheModule.getNamedGlobal(Name); |
| 2339 | if (offset) { |
Ted Kremenek | 74a1a1f | 2012-04-04 00:55:25 +0000 | [diff] [blame] | 2340 | offset->setInitializer(offsetValue); |
| 2341 | // If this is the real definition, change its linkage type so that |
| 2342 | // different modules will use this one, rather than their private |
| 2343 | // copy. |
| 2344 | offset->setLinkage(llvm::GlobalValue::ExternalLinkage); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2345 | } else { |
Ted Kremenek | 74a1a1f | 2012-04-04 00:55:25 +0000 | [diff] [blame] | 2346 | // Add a new alias if there isn't one already. |
| 2347 | offset = new llvm::GlobalVariable(TheModule, offsetValue->getType(), |
| 2348 | false, llvm::GlobalValue::ExternalLinkage, offsetValue, Name); |
| 2349 | (void) offset; // Silence dead store warning. |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2350 | } |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 2351 | ++ivarIndex; |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2352 | } |
David Chisnall | 9d06ba8 | 2011-10-25 10:12:21 +0000 | [diff] [blame] | 2353 | llvm::Constant *ZeroPtr = llvm::ConstantInt::get(IntPtrTy, 0); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2354 | //Generate metaclass for class methods |
| 2355 | llvm::Constant *MetaClassStruct = GenerateClassStructure(NULLPtr, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2356 | NULLPtr, 0x12L, ClassName.c_str(), nullptr, Zeros[0], GenerateIvarList( |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2357 | empty, empty, empty), ClassMethodList, NULLPtr, |
David Chisnall | 9d06ba8 | 2011-10-25 10:12:21 +0000 | [diff] [blame] | 2358 | NULLPtr, NULLPtr, ZeroPtr, ZeroPtr, true); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 2359 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2360 | // Generate the class structure |
Chris Lattner | 8ec03f5 | 2008-11-24 03:54:41 +0000 | [diff] [blame] | 2361 | llvm::Constant *ClassStruct = |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2362 | GenerateClassStructure(MetaClassStruct, SuperClass, 0x11L, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2363 | ClassName.c_str(), nullptr, |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 2364 | llvm::ConstantInt::get(LongTy, instanceSize), IvarList, |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2365 | MethodList, GenerateProtocolList(Protocols), IvarOffsetArray, |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2366 | Properties, StrongIvarBitmap, WeakIvarBitmap); |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 2367 | |
| 2368 | // Resolve the class aliases, if they exist. |
| 2369 | if (ClassPtrAlias) { |
David Chisnall | 0b9c22b | 2010-11-09 11:21:43 +0000 | [diff] [blame] | 2370 | ClassPtrAlias->replaceAllUsesWith( |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2371 | llvm::ConstantExpr::getBitCast(ClassStruct, IdTy)); |
David Chisnall | 0b9c22b | 2010-11-09 11:21:43 +0000 | [diff] [blame] | 2372 | ClassPtrAlias->eraseFromParent(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2373 | ClassPtrAlias = nullptr; |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 2374 | } |
| 2375 | if (MetaClassPtrAlias) { |
David Chisnall | 0b9c22b | 2010-11-09 11:21:43 +0000 | [diff] [blame] | 2376 | MetaClassPtrAlias->replaceAllUsesWith( |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2377 | llvm::ConstantExpr::getBitCast(MetaClassStruct, IdTy)); |
David Chisnall | 0b9c22b | 2010-11-09 11:21:43 +0000 | [diff] [blame] | 2378 | MetaClassPtrAlias->eraseFromParent(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2379 | MetaClassPtrAlias = nullptr; |
Daniel Dunbar | 5efccb1 | 2009-05-04 15:31:17 +0000 | [diff] [blame] | 2380 | } |
| 2381 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2382 | // Add class structure to list to be added to the symtab later |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2383 | ClassStruct = llvm::ConstantExpr::getBitCast(ClassStruct, PtrToInt8Ty); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2384 | Classes.push_back(ClassStruct); |
| 2385 | } |
| 2386 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2387 | llvm::Function *CGObjCGNU::ModuleInitFunction() { |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2388 | // Only emit an ObjC load function if no Objective-C stuff has been called |
| 2389 | if (Classes.empty() && Categories.empty() && ConstantStrings.empty() && |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2390 | ExistingProtocols.empty() && SelectorTable.empty()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2391 | return nullptr; |
Eli Friedman | 1b8956e | 2008-06-01 16:00:02 +0000 | [diff] [blame] | 2392 | |
Fariborz Jahanian | d9a1db3 | 2009-09-10 21:48:21 +0000 | [diff] [blame] | 2393 | // Add all referenced protocols to a category. |
| 2394 | GenerateProtocolHolderCategory(); |
| 2395 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2396 | llvm::StructType *SelStructTy = dyn_cast<llvm::StructType>( |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 2397 | SelectorTy->getElementType()); |
Jay Foad | ef6de3d | 2011-07-11 09:56:20 +0000 | [diff] [blame] | 2398 | llvm::Type *SelStructPtrTy = SelectorTy; |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2399 | if (!SelStructTy) { |
| 2400 | SelStructTy = llvm::StructType::get(PtrToInt8Ty, PtrToInt8Ty, nullptr); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2401 | SelStructPtrTy = llvm::PointerType::getUnqual(SelStructTy); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 2402 | } |
| 2403 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2404 | std::vector<llvm::Constant*> Elements; |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 2405 | llvm::Constant *Statics = NULLPtr; |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2406 | // Generate statics list: |
Stephen Hines | 0e2c34f | 2015-03-23 12:09:02 -0700 | [diff] [blame] | 2407 | if (!ConstantStrings.empty()) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2408 | llvm::ArrayType *StaticsArrayTy = llvm::ArrayType::get(PtrToInt8Ty, |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 2409 | ConstantStrings.size() + 1); |
| 2410 | ConstantStrings.push_back(NULLPtr); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2411 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2412 | StringRef StringClass = CGM.getLangOpts().ObjCConstantStringClass; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2413 | |
Daniel Dunbar | 1b09695 | 2009-11-29 02:38:47 +0000 | [diff] [blame] | 2414 | if (StringClass.empty()) StringClass = "NXConstantString"; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2415 | |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2416 | Elements.push_back(MakeConstantString(StringClass, |
| 2417 | ".objc_static_class_name")); |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 2418 | Elements.push_back(llvm::ConstantArray::get(StaticsArrayTy, |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 2419 | ConstantStrings)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2420 | llvm::StructType *StaticsListTy = |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2421 | llvm::StructType::get(PtrToInt8Ty, StaticsArrayTy, nullptr); |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 2422 | llvm::Type *StaticsListPtrTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2423 | llvm::PointerType::getUnqual(StaticsListTy); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2424 | Statics = MakeGlobal(StaticsListTy, Elements, CGM.getPointerAlign(), |
| 2425 | ".objc_statics"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2426 | llvm::ArrayType *StaticsListArrayTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2427 | llvm::ArrayType::get(StaticsListPtrTy, 2); |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 2428 | Elements.clear(); |
| 2429 | Elements.push_back(Statics); |
Owen Anderson | c9c88b4 | 2009-07-31 20:28:54 +0000 | [diff] [blame] | 2430 | Elements.push_back(llvm::Constant::getNullValue(StaticsListPtrTy)); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2431 | Statics = MakeGlobal(StaticsListArrayTy, Elements, |
| 2432 | CGM.getPointerAlign(), ".objc_statics_ptr"); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2433 | Statics = llvm::ConstantExpr::getBitCast(Statics, PtrTy); |
Chris Lattner | 71238f6 | 2009-04-25 23:19:45 +0000 | [diff] [blame] | 2434 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2435 | // Array of classes, categories, and constant objects |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2436 | llvm::ArrayType *ClassListTy = llvm::ArrayType::get(PtrToInt8Ty, |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2437 | Classes.size() + Categories.size() + 2); |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 2438 | llvm::StructType *SymTabTy = llvm::StructType::get(LongTy, SelStructPtrTy, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 2439 | llvm::Type::getInt16Ty(VMContext), |
| 2440 | llvm::Type::getInt16Ty(VMContext), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2441 | ClassListTy, nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2442 | |
| 2443 | Elements.clear(); |
| 2444 | // Pointer to an array of selectors used in this module. |
| 2445 | std::vector<llvm::Constant*> Selectors; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2446 | std::vector<llvm::GlobalAlias*> SelectorAliases; |
| 2447 | for (SelectorMap::iterator iter = SelectorTable.begin(), |
| 2448 | iterEnd = SelectorTable.end(); iter != iterEnd ; ++iter) { |
| 2449 | |
| 2450 | std::string SelNameStr = iter->first.getAsString(); |
| 2451 | llvm::Constant *SelName = ExportUniqueString(SelNameStr, ".objc_sel_name"); |
| 2452 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2453 | SmallVectorImpl<TypedSelector> &Types = iter->second; |
| 2454 | for (SmallVectorImpl<TypedSelector>::iterator i = Types.begin(), |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2455 | e = Types.end() ; i!=e ; i++) { |
| 2456 | |
| 2457 | llvm::Constant *SelectorTypeEncoding = NULLPtr; |
| 2458 | if (!i->first.empty()) |
| 2459 | SelectorTypeEncoding = MakeConstantString(i->first, ".objc_sel_types"); |
| 2460 | |
| 2461 | Elements.push_back(SelName); |
| 2462 | Elements.push_back(SelectorTypeEncoding); |
| 2463 | Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); |
| 2464 | Elements.clear(); |
| 2465 | |
| 2466 | // Store the selector alias for later replacement |
| 2467 | SelectorAliases.push_back(i->second); |
| 2468 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2469 | } |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2470 | unsigned SelectorCount = Selectors.size(); |
| 2471 | // NULL-terminate the selector list. This should not actually be required, |
| 2472 | // because the selector list has a length field. Unfortunately, the GCC |
| 2473 | // runtime decides to ignore the length field and expects a NULL terminator, |
| 2474 | // and GCC cooperates with this by always setting the length to 0. |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2475 | Elements.push_back(NULLPtr); |
| 2476 | Elements.push_back(NULLPtr); |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 2477 | Selectors.push_back(llvm::ConstantStruct::get(SelStructTy, Elements)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2478 | Elements.clear(); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2479 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2480 | // Number of static selectors |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2481 | Elements.push_back(llvm::ConstantInt::get(LongTy, SelectorCount)); |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 2482 | llvm::GlobalVariable *SelectorList = |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2483 | MakeGlobalArray(SelStructTy, Selectors, CGM.getPointerAlign(), |
| 2484 | ".objc_selector_list"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2485 | Elements.push_back(llvm::ConstantExpr::getBitCast(SelectorList, |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 2486 | SelStructPtrTy)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2487 | |
| 2488 | // Now that all of the static selectors exist, create pointers to them. |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2489 | for (unsigned int i=0 ; i<SelectorCount ; i++) { |
| 2490 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2491 | llvm::Constant *Idxs[] = {Zeros[0], |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2492 | llvm::ConstantInt::get(Int32Ty, i), Zeros[0]}; |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2493 | // FIXME: We're generating redundant loads and stores here! |
Pirama Arumuga Nainar | 58878f8 | 2015-05-06 11:48:57 -0700 | [diff] [blame] | 2494 | llvm::Constant *SelPtr = llvm::ConstantExpr::getGetElementPtr( |
| 2495 | SelectorList->getValueType(), SelectorList, makeArrayRef(Idxs, 2)); |
Chris Lattner | e160c9b | 2009-01-27 05:06:01 +0000 | [diff] [blame] | 2496 | // If selectors are defined as an opaque type, cast the pointer to this |
| 2497 | // type. |
David Chisnall | c7ef462 | 2011-03-23 22:52:06 +0000 | [diff] [blame] | 2498 | SelPtr = llvm::ConstantExpr::getBitCast(SelPtr, SelectorTy); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2499 | SelectorAliases[i]->replaceAllUsesWith(SelPtr); |
| 2500 | SelectorAliases[i]->eraseFromParent(); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2501 | } |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2502 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2503 | // Number of classes defined. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2504 | Elements.push_back(llvm::ConstantInt::get(llvm::Type::getInt16Ty(VMContext), |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2505 | Classes.size())); |
| 2506 | // Number of categories defined |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2507 | Elements.push_back(llvm::ConstantInt::get(llvm::Type::getInt16Ty(VMContext), |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2508 | Categories.size())); |
| 2509 | // Create an array of classes, then categories, then static object instances |
| 2510 | Classes.insert(Classes.end(), Categories.begin(), Categories.end()); |
| 2511 | // NULL-terminated list of static object instances (mainly constant strings) |
| 2512 | Classes.push_back(Statics); |
| 2513 | Classes.push_back(NULLPtr); |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 2514 | llvm::Constant *ClassList = llvm::ConstantArray::get(ClassListTy, Classes); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2515 | Elements.push_back(ClassList); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2516 | // Construct the symbol table |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2517 | llvm::Constant *SymTab = |
| 2518 | MakeGlobal(SymTabTy, Elements, CGM.getPointerAlign()); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2519 | |
| 2520 | // The symbol table is contained in a module which has some version-checking |
| 2521 | // constants |
Chris Lattner | 7650d95 | 2011-06-18 22:49:11 +0000 | [diff] [blame] | 2522 | llvm::StructType * ModuleTy = llvm::StructType::get(LongTy, LongTy, |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 2523 | PtrToInt8Ty, llvm::PointerType::getUnqual(SymTabTy), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2524 | (RuntimeVersion >= 10) ? IntTy : nullptr, nullptr); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2525 | Elements.clear(); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2526 | // Runtime version, used for ABI compatibility checking. |
| 2527 | Elements.push_back(llvm::ConstantInt::get(LongTy, RuntimeVersion)); |
Fariborz Jahanian | 91a0b51 | 2009-04-01 19:49:42 +0000 | [diff] [blame] | 2528 | // sizeof(ModuleTy) |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 2529 | llvm::DataLayout td(&TheModule); |
Ken Dyck | e0afc89 | 2011-04-22 17:59:22 +0000 | [diff] [blame] | 2530 | Elements.push_back( |
| 2531 | llvm::ConstantInt::get(LongTy, |
| 2532 | td.getTypeSizeInBits(ModuleTy) / |
| 2533 | CGM.getContext().getCharWidth())); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2534 | |
| 2535 | // The path to the source file where this module was declared |
| 2536 | SourceManager &SM = CGM.getContext().getSourceManager(); |
| 2537 | const FileEntry *mainFile = SM.getFileEntryForID(SM.getMainFileID()); |
| 2538 | std::string path = |
| 2539 | std::string(mainFile->getDir()->getName()) + '/' + mainFile->getName(); |
| 2540 | Elements.push_back(MakeConstantString(path, ".objc_source_file_name")); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2541 | Elements.push_back(SymTab); |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 2542 | |
David Chisnall | f074885 | 2011-07-07 11:22:31 +0000 | [diff] [blame] | 2543 | if (RuntimeVersion >= 10) |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2544 | switch (CGM.getLangOpts().getGC()) { |
David Chisnall | f074885 | 2011-07-07 11:22:31 +0000 | [diff] [blame] | 2545 | case LangOptions::GCOnly: |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 2546 | Elements.push_back(llvm::ConstantInt::get(IntTy, 2)); |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 2547 | break; |
David Chisnall | f074885 | 2011-07-07 11:22:31 +0000 | [diff] [blame] | 2548 | case LangOptions::NonGC: |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2549 | if (CGM.getLangOpts().ObjCAutoRefCount) |
David Chisnall | f074885 | 2011-07-07 11:22:31 +0000 | [diff] [blame] | 2550 | Elements.push_back(llvm::ConstantInt::get(IntTy, 1)); |
| 2551 | else |
| 2552 | Elements.push_back(llvm::ConstantInt::get(IntTy, 0)); |
| 2553 | break; |
| 2554 | case LangOptions::HybridGC: |
| 2555 | Elements.push_back(llvm::ConstantInt::get(IntTy, 1)); |
| 2556 | break; |
| 2557 | } |
David Chisnall | a212003 | 2011-05-22 22:37:08 +0000 | [diff] [blame] | 2558 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2559 | llvm::Value *Module = MakeGlobal(ModuleTy, Elements, CGM.getPointerAlign()); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2560 | |
| 2561 | // Create the load function calling the runtime entry point with the module |
| 2562 | // structure |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2563 | llvm::Function * LoadFunction = llvm::Function::Create( |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 2564 | llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false), |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2565 | llvm::GlobalValue::InternalLinkage, ".objc_load_function", |
| 2566 | &TheModule); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 2567 | llvm::BasicBlock *EntryBB = |
| 2568 | llvm::BasicBlock::Create(VMContext, "entry", LoadFunction); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2569 | CGBuilderTy Builder(CGM, VMContext); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2570 | Builder.SetInsertPoint(EntryBB); |
Fariborz Jahanian | 26c8294 | 2009-03-30 18:02:14 +0000 | [diff] [blame] | 2571 | |
Benjamin Kramer | 95d318c | 2011-05-28 14:26:31 +0000 | [diff] [blame] | 2572 | llvm::FunctionType *FT = |
Jay Foad | da549e8 | 2011-07-29 13:56:53 +0000 | [diff] [blame] | 2573 | llvm::FunctionType::get(Builder.getVoidTy(), |
| 2574 | llvm::PointerType::getUnqual(ModuleTy), true); |
Benjamin Kramer | 95d318c | 2011-05-28 14:26:31 +0000 | [diff] [blame] | 2575 | llvm::Value *Register = CGM.CreateRuntimeFunction(FT, "__objc_exec_class"); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2576 | Builder.CreateCall(Register, Module); |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2577 | |
David Chisnall | dccaa23 | 2012-02-01 19:16:56 +0000 | [diff] [blame] | 2578 | if (!ClassAliases.empty()) { |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2579 | llvm::Type *ArgTypes[2] = {PtrTy, PtrToInt8Ty}; |
| 2580 | llvm::FunctionType *RegisterAliasTy = |
| 2581 | llvm::FunctionType::get(Builder.getVoidTy(), |
| 2582 | ArgTypes, false); |
| 2583 | llvm::Function *RegisterAlias = llvm::Function::Create( |
| 2584 | RegisterAliasTy, |
| 2585 | llvm::GlobalValue::ExternalWeakLinkage, "class_registerAlias_np", |
| 2586 | &TheModule); |
| 2587 | llvm::BasicBlock *AliasBB = |
| 2588 | llvm::BasicBlock::Create(VMContext, "alias", LoadFunction); |
| 2589 | llvm::BasicBlock *NoAliasBB = |
| 2590 | llvm::BasicBlock::Create(VMContext, "no_alias", LoadFunction); |
| 2591 | |
| 2592 | // Branch based on whether the runtime provided class_registerAlias_np() |
| 2593 | llvm::Value *HasRegisterAlias = Builder.CreateICmpNE(RegisterAlias, |
| 2594 | llvm::Constant::getNullValue(RegisterAlias->getType())); |
| 2595 | Builder.CreateCondBr(HasRegisterAlias, AliasBB, NoAliasBB); |
| 2596 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2597 | // The true branch (has alias registration function): |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2598 | Builder.SetInsertPoint(AliasBB); |
| 2599 | // Emit alias registration calls: |
| 2600 | for (std::vector<ClassAliasPair>::iterator iter = ClassAliases.begin(); |
| 2601 | iter != ClassAliases.end(); ++iter) { |
| 2602 | llvm::Constant *TheClass = |
| 2603 | TheModule.getGlobalVariable(("_OBJC_CLASS_" + iter->first).c_str(), |
| 2604 | true); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2605 | if (TheClass) { |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2606 | TheClass = llvm::ConstantExpr::getBitCast(TheClass, PtrTy); |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 2607 | Builder.CreateCall(RegisterAlias, |
| 2608 | {TheClass, MakeConstantString(iter->second)}); |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2609 | } |
| 2610 | } |
| 2611 | // Jump to end: |
| 2612 | Builder.CreateBr(NoAliasBB); |
| 2613 | |
| 2614 | // Missing alias registration function, just return from the function: |
| 2615 | Builder.SetInsertPoint(NoAliasBB); |
| 2616 | } |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2617 | Builder.CreateRetVoid(); |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2618 | |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2619 | return LoadFunction; |
| 2620 | } |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2621 | |
Fariborz Jahanian | 679a502 | 2009-01-10 21:06:09 +0000 | [diff] [blame] | 2622 | llvm::Function *CGObjCGNU::GenerateMethod(const ObjCMethodDecl *OMD, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2623 | const ObjCContainerDecl *CD) { |
| 2624 | const ObjCCategoryImplDecl *OCD = |
Steve Naroff | 3e0a540 | 2009-01-08 19:41:02 +0000 | [diff] [blame] | 2625 | dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2626 | StringRef CategoryName = OCD ? OCD->getName() : ""; |
| 2627 | StringRef ClassName = CD->getName(); |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2628 | Selector MethodName = OMD->getSelector(); |
Douglas Gregor | f8d49f6 | 2009-01-09 17:18:27 +0000 | [diff] [blame] | 2629 | bool isClassMethod = !OMD->isInstanceMethod(); |
Daniel Dunbar | 7ded7f4 | 2008-08-15 22:20:32 +0000 | [diff] [blame] | 2630 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 2631 | CodeGenTypes &Types = CGM.getTypes(); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2632 | llvm::FunctionType *MethodTy = |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 2633 | Types.GetFunctionType(Types.arrangeObjCMethodDeclaration(OMD)); |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 2634 | std::string FunctionName = SymbolNameForMethod(ClassName, CategoryName, |
| 2635 | MethodName, isClassMethod); |
| 2636 | |
Daniel Dunbar | d6c93d7 | 2009-09-17 04:01:22 +0000 | [diff] [blame] | 2637 | llvm::Function *Method |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2638 | = llvm::Function::Create(MethodTy, |
| 2639 | llvm::GlobalValue::InternalLinkage, |
| 2640 | FunctionName, |
| 2641 | &TheModule); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 2642 | return Method; |
| 2643 | } |
| 2644 | |
David Chisnall | 789ecde | 2011-05-23 22:33:28 +0000 | [diff] [blame] | 2645 | llvm::Constant *CGObjCGNU::GetPropertyGetFunction() { |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2646 | return GetPropertyFn; |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 2647 | } |
| 2648 | |
David Chisnall | 789ecde | 2011-05-23 22:33:28 +0000 | [diff] [blame] | 2649 | llvm::Constant *CGObjCGNU::GetPropertySetFunction() { |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2650 | return SetPropertyFn; |
Daniel Dunbar | 49f6602 | 2008-09-24 03:38:44 +0000 | [diff] [blame] | 2651 | } |
| 2652 | |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 2653 | llvm::Constant *CGObjCGNU::GetOptimizedPropertySetFunction(bool atomic, |
| 2654 | bool copy) { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2655 | return nullptr; |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 2656 | } |
| 2657 | |
David Chisnall | 789ecde | 2011-05-23 22:33:28 +0000 | [diff] [blame] | 2658 | llvm::Constant *CGObjCGNU::GetGetStructFunction() { |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2659 | return GetStructPropertyFn; |
David Chisnall | 8fac25d | 2010-12-26 22:13:16 +0000 | [diff] [blame] | 2660 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 2661 | |
David Chisnall | 789ecde | 2011-05-23 22:33:28 +0000 | [diff] [blame] | 2662 | llvm::Constant *CGObjCGNU::GetSetStructFunction() { |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2663 | return SetStructPropertyFn; |
Fariborz Jahanian | 6cc5906 | 2010-04-12 18:18:10 +0000 | [diff] [blame] | 2664 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 2665 | |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 2666 | llvm::Constant *CGObjCGNU::GetCppAtomicObjectGetFunction() { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2667 | return nullptr; |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 2668 | } |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 2669 | |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 2670 | llvm::Constant *CGObjCGNU::GetCppAtomicObjectSetFunction() { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2671 | return nullptr; |
Fariborz Jahanian | e317302 | 2012-01-06 18:07:23 +0000 | [diff] [blame] | 2672 | } |
Fariborz Jahanian | 6cc5906 | 2010-04-12 18:18:10 +0000 | [diff] [blame] | 2673 | |
Daniel Dunbar | 309a436 | 2009-07-24 07:40:24 +0000 | [diff] [blame] | 2674 | llvm::Constant *CGObjCGNU::EnumerationMutationFunction() { |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2675 | return EnumerationMutationFn; |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 2676 | } |
| 2677 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2678 | void CGObjCGNU::EmitSynchronizedStmt(CodeGenFunction &CGF, |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 2679 | const ObjCAtSynchronizedStmt &S) { |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 2680 | EmitAtSynchronizedStmt(CGF, S, SyncEnterFn, SyncExitFn); |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 2681 | } |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 2682 | |
David Chisnall | 0faa516 | 2009-12-24 02:26:34 +0000 | [diff] [blame] | 2683 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2684 | void CGObjCGNU::EmitTryStmt(CodeGenFunction &CGF, |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 2685 | const ObjCAtTryStmt &S) { |
| 2686 | // Unlike the Apple non-fragile runtimes, which also uses |
| 2687 | // unwind-based zero cost exceptions, the GNU Objective C runtime's |
| 2688 | // EH support isn't a veneer over C++ EH. Instead, exception |
David Chisnall | c686004 | 2012-11-07 16:50:40 +0000 | [diff] [blame] | 2689 | // objects are created by objc_exception_throw and destroyed by |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 2690 | // the personality function; this avoids the need for bracketing |
| 2691 | // catch handlers with calls to __blah_begin_catch/__blah_end_catch |
| 2692 | // (or even _Unwind_DeleteException), but probably doesn't |
| 2693 | // interoperate very well with foreign exceptions. |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 2694 | // |
David Chisnall | 80558d2 | 2011-03-20 21:35:39 +0000 | [diff] [blame] | 2695 | // In Objective-C++ mode, we actually emit something equivalent to the C++ |
David Chisnall | 9735ca6 | 2011-03-25 11:57:33 +0000 | [diff] [blame] | 2696 | // exception handler. |
| 2697 | EmitTryCatchStmt(CGF, S, EnterCatchFn, ExitCatchFn, ExceptionReThrowFn); |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 2698 | } |
| 2699 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2700 | void CGObjCGNU::EmitThrowStmt(CodeGenFunction &CGF, |
Fariborz Jahanian | 6a3c70e | 2013-01-10 19:02:56 +0000 | [diff] [blame] | 2701 | const ObjCAtThrowStmt &S, |
| 2702 | bool ClearInsertionPoint) { |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 2703 | llvm::Value *ExceptionAsObject; |
| 2704 | |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 2705 | if (const Expr *ThrowExpr = S.getThrowExpr()) { |
John McCall | 2b014d6 | 2011-10-01 10:32:24 +0000 | [diff] [blame] | 2706 | llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr); |
Fariborz Jahanian | 1e64a95 | 2009-05-17 16:49:27 +0000 | [diff] [blame] | 2707 | ExceptionAsObject = Exception; |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 2708 | } else { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2709 | assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) && |
Chris Lattner | 5dc0867 | 2009-05-08 00:11:50 +0000 | [diff] [blame] | 2710 | "Unexpected rethrow outside @catch block."); |
| 2711 | ExceptionAsObject = CGF.ObjCEHValueStack.back(); |
| 2712 | } |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 2713 | ExceptionAsObject = CGF.Builder.CreateBitCast(ExceptionAsObject, IdTy); |
David Chisnall | c686004 | 2012-11-07 16:50:40 +0000 | [diff] [blame] | 2714 | llvm::CallSite Throw = |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2715 | CGF.EmitRuntimeCallOrInvoke(ExceptionThrowFn, ExceptionAsObject); |
David Chisnall | c686004 | 2012-11-07 16:50:40 +0000 | [diff] [blame] | 2716 | Throw.setDoesNotReturn(); |
Eli Friedman | c972c92 | 2012-08-10 21:26:17 +0000 | [diff] [blame] | 2717 | CGF.Builder.CreateUnreachable(); |
Fariborz Jahanian | 6a3c70e | 2013-01-10 19:02:56 +0000 | [diff] [blame] | 2718 | if (ClearInsertionPoint) |
| 2719 | CGF.Builder.ClearInsertionPoint(); |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 2720 | } |
| 2721 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2722 | llvm::Value * CGObjCGNU::EmitObjCWeakRead(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2723 | Address AddrWeakObj) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2724 | CGBuilderTy &B = CGF.Builder; |
David Chisnall | 31fc0c1 | 2011-05-30 12:00:26 +0000 | [diff] [blame] | 2725 | AddrWeakObj = EnforceType(B, AddrWeakObj, PtrToIdTy); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2726 | return B.CreateCall(WeakReadFn.getType(), WeakReadFn, |
| 2727 | AddrWeakObj.getPointer()); |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 2728 | } |
| 2729 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2730 | void CGObjCGNU::EmitObjCWeakAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2731 | llvm::Value *src, Address dst) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2732 | CGBuilderTy &B = CGF.Builder; |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 2733 | src = EnforceType(B, src, IdTy); |
| 2734 | dst = EnforceType(B, dst, PtrToIdTy); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2735 | B.CreateCall(WeakAssignFn.getType(), WeakAssignFn, |
| 2736 | {src, dst.getPointer()}); |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 2737 | } |
| 2738 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2739 | void CGObjCGNU::EmitObjCGlobalAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2740 | llvm::Value *src, Address dst, |
Fariborz Jahanian | 021a7a6 | 2010-07-20 20:30:03 +0000 | [diff] [blame] | 2741 | bool threadlocal) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2742 | CGBuilderTy &B = CGF.Builder; |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 2743 | src = EnforceType(B, src, IdTy); |
| 2744 | dst = EnforceType(B, dst, PtrToIdTy); |
Pirama Arumuga Nainar | b6d6993 | 2015-07-01 12:25:36 -0700 | [diff] [blame] | 2745 | // FIXME. Add threadloca assign API |
| 2746 | assert(!threadlocal && "EmitObjCGlobalAssign - Threal Local API NYI"); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2747 | B.CreateCall(GlobalAssignFn.getType(), GlobalAssignFn, |
| 2748 | {src, dst.getPointer()}); |
Fariborz Jahanian | 5862650 | 2008-11-19 00:59:10 +0000 | [diff] [blame] | 2749 | } |
| 2750 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2751 | void CGObjCGNU::EmitObjCIvarAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2752 | llvm::Value *src, Address dst, |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 2753 | llvm::Value *ivarOffset) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2754 | CGBuilderTy &B = CGF.Builder; |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 2755 | src = EnforceType(B, src, IdTy); |
David Chisnall | b44eda3 | 2011-05-25 20:33:17 +0000 | [diff] [blame] | 2756 | dst = EnforceType(B, dst, IdTy); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2757 | B.CreateCall(IvarAssignFn.getType(), IvarAssignFn, |
| 2758 | {src, dst.getPointer(), ivarOffset}); |
Fariborz Jahanian | 7eda836 | 2008-11-20 19:23:36 +0000 | [diff] [blame] | 2759 | } |
| 2760 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2761 | void CGObjCGNU::EmitObjCStrongCastAssign(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2762 | llvm::Value *src, Address dst) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2763 | CGBuilderTy &B = CGF.Builder; |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 2764 | src = EnforceType(B, src, IdTy); |
| 2765 | dst = EnforceType(B, dst, PtrToIdTy); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2766 | B.CreateCall(StrongCastAssignFn.getType(), StrongCastAssignFn, |
| 2767 | {src, dst.getPointer()}); |
Fariborz Jahanian | 5862650 | 2008-11-19 00:59:10 +0000 | [diff] [blame] | 2768 | } |
| 2769 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2770 | void CGObjCGNU::EmitGCMemmoveCollectable(CodeGenFunction &CGF, |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2771 | Address DestPtr, |
| 2772 | Address SrcPtr, |
Fariborz Jahanian | 55bcace | 2010-06-15 22:44:06 +0000 | [diff] [blame] | 2773 | llvm::Value *Size) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2774 | CGBuilderTy &B = CGF.Builder; |
David Chisnall | 68e5e13 | 2011-05-28 14:23:43 +0000 | [diff] [blame] | 2775 | DestPtr = EnforceType(B, DestPtr, PtrTy); |
| 2776 | SrcPtr = EnforceType(B, SrcPtr, PtrTy); |
David Chisnall | ef6e0f3 | 2010-02-03 15:59:02 +0000 | [diff] [blame] | 2777 | |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2778 | B.CreateCall(MemMoveFn.getType(), MemMoveFn, |
| 2779 | {DestPtr.getPointer(), SrcPtr.getPointer(), Size}); |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 2780 | } |
| 2781 | |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2782 | llvm::GlobalVariable *CGObjCGNU::ObjCIvarOffsetVariable( |
| 2783 | const ObjCInterfaceDecl *ID, |
| 2784 | const ObjCIvarDecl *Ivar) { |
| 2785 | const std::string Name = "__objc_ivar_offset_" + ID->getNameAsString() |
| 2786 | + '.' + Ivar->getNameAsString(); |
| 2787 | // Emit the variable and initialize it with what we think the correct value |
| 2788 | // is. This allows code compiled with non-fragile ivars to work correctly |
| 2789 | // when linked against code which isn't (most of the time). |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2790 | llvm::GlobalVariable *IvarOffsetPointer = TheModule.getNamedGlobal(Name); |
| 2791 | if (!IvarOffsetPointer) { |
David Chisnall | e0d9876 | 2010-11-03 16:12:44 +0000 | [diff] [blame] | 2792 | // This will cause a run-time crash if we accidentally use it. A value of |
| 2793 | // 0 would seem more sensible, but will silently overwrite the isa pointer |
| 2794 | // causing a great deal of confusion. |
| 2795 | uint64_t Offset = -1; |
| 2796 | // We can't call ComputeIvarBaseOffset() here if we have the |
| 2797 | // implementation, because it will create an invalid ASTRecordLayout object |
| 2798 | // that we are then stuck with forever, so we only initialize the ivar |
| 2799 | // offset variable with a guess if we only have the interface. The |
| 2800 | // initializer will be reset later anyway, when we are generating the class |
| 2801 | // description. |
| 2802 | if (!CGM.getContext().getObjCImplementation( |
Dan Gohman | cb421fa | 2010-04-19 16:39:44 +0000 | [diff] [blame] | 2803 | const_cast<ObjCInterfaceDecl *>(ID))) |
Eli Friedman | e5b4666 | 2012-11-06 22:15:52 +0000 | [diff] [blame] | 2804 | Offset = ComputeIvarBaseOffset(CGM, ID, Ivar); |
David Chisnall | d901da5 | 2010-04-19 01:37:25 +0000 | [diff] [blame] | 2805 | |
David Chisnall | 49de528 | 2011-10-08 08:54:36 +0000 | [diff] [blame] | 2806 | llvm::ConstantInt *OffsetGuess = llvm::ConstantInt::get(Int32Ty, Offset, |
Richard Trieu | 243f108 | 2011-09-21 02:46:06 +0000 | [diff] [blame] | 2807 | /*isSigned*/true); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2808 | // Don't emit the guess in non-PIC code because the linker will not be able |
| 2809 | // to replace it with the real version for a library. In non-PIC code you |
| 2810 | // must compile with the fragile ABI if you want to use ivars from a |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2811 | // GCC-compiled class. |
Pirama Arumuga Nainar | 4967a71 | 2016-09-19 22:19:55 -0700 | [diff] [blame^] | 2812 | if (CGM.getLangOpts().PICLevel) { |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2813 | llvm::GlobalVariable *IvarOffsetGV = new llvm::GlobalVariable(TheModule, |
David Chisnall | 917b28b | 2011-10-04 15:35:30 +0000 | [diff] [blame] | 2814 | Int32Ty, false, |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2815 | llvm::GlobalValue::PrivateLinkage, OffsetGuess, Name+".guess"); |
| 2816 | IvarOffsetPointer = new llvm::GlobalVariable(TheModule, |
| 2817 | IvarOffsetGV->getType(), false, llvm::GlobalValue::LinkOnceAnyLinkage, |
| 2818 | IvarOffsetGV, Name); |
| 2819 | } else { |
| 2820 | IvarOffsetPointer = new llvm::GlobalVariable(TheModule, |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 2821 | llvm::Type::getInt32PtrTy(VMContext), false, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2822 | llvm::GlobalValue::ExternalLinkage, nullptr, Name); |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2823 | } |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2824 | } |
David Chisnall | 8a5a9aa | 2009-08-31 16:41:57 +0000 | [diff] [blame] | 2825 | return IvarOffsetPointer; |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2826 | } |
| 2827 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2828 | LValue CGObjCGNU::EmitObjCValueForIvar(CodeGenFunction &CGF, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 2829 | QualType ObjectTy, |
| 2830 | llvm::Value *BaseValue, |
| 2831 | const ObjCIvarDecl *Ivar, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 2832 | unsigned CVRQualifiers) { |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 2833 | const ObjCInterfaceDecl *ID = |
| 2834 | ObjectTy->getAs<ObjCObjectType>()->getInterface(); |
Daniel Dunbar | 9777687 | 2009-04-22 07:32:20 +0000 | [diff] [blame] | 2835 | return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers, |
| 2836 | EmitIvarOffset(CGF, ID, Ivar)); |
Fariborz Jahanian | 0bb2036 | 2009-02-02 20:02:29 +0000 | [diff] [blame] | 2837 | } |
Mike Stump | bb1c860 | 2009-07-31 21:31:32 +0000 | [diff] [blame] | 2838 | |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2839 | static const ObjCInterfaceDecl *FindIvarInterface(ASTContext &Context, |
| 2840 | const ObjCInterfaceDecl *OID, |
| 2841 | const ObjCIvarDecl *OIVD) { |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 2842 | for (const ObjCIvarDecl *next = OID->all_declared_ivar_begin(); next; |
| 2843 | next = next->getNextIvar()) { |
| 2844 | if (OIVD == next) |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2845 | return OID; |
| 2846 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2847 | |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2848 | // Otherwise check in the super class. |
| 2849 | if (const ObjCInterfaceDecl *Super = OID->getSuperClass()) |
| 2850 | return FindIvarInterface(Context, Super, OIVD); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2851 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2852 | return nullptr; |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2853 | } |
Fariborz Jahanian | 0bb2036 | 2009-02-02 20:02:29 +0000 | [diff] [blame] | 2854 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2855 | llvm::Value *CGObjCGNU::EmitIvarOffset(CodeGenFunction &CGF, |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame] | 2856 | const ObjCInterfaceDecl *Interface, |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 2857 | const ObjCIvarDecl *Ivar) { |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2858 | if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) { |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2859 | Interface = FindIvarInterface(CGM.getContext(), Interface, Ivar); |
David Chisnall | 63ff703 | 2011-07-07 12:34:51 +0000 | [diff] [blame] | 2860 | if (RuntimeVersion < 10) |
| 2861 | return CGF.Builder.CreateZExtOrBitCast( |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2862 | CGF.Builder.CreateDefaultAlignedLoad(CGF.Builder.CreateAlignedLoad( |
| 2863 | ObjCIvarOffsetVariable(Interface, Ivar), |
| 2864 | CGF.getPointerAlign(), "ivar")), |
David Chisnall | 63ff703 | 2011-07-07 12:34:51 +0000 | [diff] [blame] | 2865 | PtrDiffTy); |
| 2866 | std::string name = "__objc_ivar_offset_value_" + |
| 2867 | Interface->getNameAsString() +"." + Ivar->getNameAsString(); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2868 | CharUnits Align = CGM.getIntAlign(); |
David Chisnall | 63ff703 | 2011-07-07 12:34:51 +0000 | [diff] [blame] | 2869 | llvm::Value *Offset = TheModule.getGlobalVariable(name); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2870 | if (!Offset) { |
| 2871 | auto GV = new llvm::GlobalVariable(TheModule, IntTy, |
David Chisnall | 3fc81d3 | 2011-08-01 17:36:53 +0000 | [diff] [blame] | 2872 | false, llvm::GlobalValue::LinkOnceAnyLinkage, |
| 2873 | llvm::Constant::getNullValue(IntTy), name); |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2874 | GV->setAlignment(Align.getQuantity()); |
| 2875 | Offset = GV; |
| 2876 | } |
| 2877 | Offset = CGF.Builder.CreateAlignedLoad(Offset, Align); |
David Chisnall | 6614845 | 2012-04-06 15:39:12 +0000 | [diff] [blame] | 2878 | if (Offset->getType() != PtrDiffTy) |
| 2879 | Offset = CGF.Builder.CreateZExtOrBitCast(Offset, PtrDiffTy); |
| 2880 | return Offset; |
Fariborz Jahanian | 9cd96ff | 2009-05-20 18:41:51 +0000 | [diff] [blame] | 2881 | } |
Eli Friedman | e5b4666 | 2012-11-06 22:15:52 +0000 | [diff] [blame] | 2882 | uint64_t Offset = ComputeIvarBaseOffset(CGF.CGM, Interface, Ivar); |
| 2883 | return llvm::ConstantInt::get(PtrDiffTy, Offset, /*isSigned*/true); |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 2884 | } |
| 2885 | |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2886 | CGObjCRuntime * |
| 2887 | clang::CodeGen::CreateGNUObjCRuntime(CodeGenModule &CGM) { |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2888 | switch (CGM.getLangOpts().ObjCRuntime.getKind()) { |
David Chisnall | 11d3f4c | 2012-07-03 20:49:52 +0000 | [diff] [blame] | 2889 | case ObjCRuntime::GNUstep: |
David Chisnall | 9f6614e | 2011-03-23 16:36:54 +0000 | [diff] [blame] | 2890 | return new CGObjCGNUstep(CGM); |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2891 | |
David Chisnall | 11d3f4c | 2012-07-03 20:49:52 +0000 | [diff] [blame] | 2892 | case ObjCRuntime::GCC: |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2893 | return new CGObjCGCC(CGM); |
| 2894 | |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 2895 | case ObjCRuntime::ObjFW: |
| 2896 | return new CGObjCObjFW(CGM); |
| 2897 | |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2898 | case ObjCRuntime::FragileMacOSX: |
| 2899 | case ObjCRuntime::MacOSX: |
| 2900 | case ObjCRuntime::iOS: |
Pirama Arumuga Nainar | 87d948e | 2016-03-03 15:49:35 -0800 | [diff] [blame] | 2901 | case ObjCRuntime::WatchOS: |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2902 | llvm_unreachable("these runtimes are not GNU runtimes"); |
| 2903 | } |
| 2904 | llvm_unreachable("bad runtime"); |
Chris Lattner | 0f98426 | 2008-03-01 08:50:34 +0000 | [diff] [blame] | 2905 | } |